File: | src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Object/MachOObjectFile.cpp |
Warning: | line 4038, column 41 The right operand of '-' is a garbage value |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
1 | //===- MachOObjectFile.cpp - Mach-O object file binding -------------------===// | |||
2 | // | |||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |||
4 | // See https://llvm.org/LICENSE.txt for license information. | |||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |||
6 | // | |||
7 | //===----------------------------------------------------------------------===// | |||
8 | // | |||
9 | // This file defines the MachOObjectFile class, which binds the MachOObject | |||
10 | // class to the generic ObjectFile wrapper. | |||
11 | // | |||
12 | //===----------------------------------------------------------------------===// | |||
13 | ||||
14 | #include "llvm/ADT/ArrayRef.h" | |||
15 | #include "llvm/ADT/None.h" | |||
16 | #include "llvm/ADT/STLExtras.h" | |||
17 | #include "llvm/ADT/SmallVector.h" | |||
18 | #include "llvm/ADT/StringRef.h" | |||
19 | #include "llvm/ADT/StringSwitch.h" | |||
20 | #include "llvm/ADT/Triple.h" | |||
21 | #include "llvm/ADT/Twine.h" | |||
22 | #include "llvm/BinaryFormat/MachO.h" | |||
23 | #include "llvm/Object/Error.h" | |||
24 | #include "llvm/Object/MachO.h" | |||
25 | #include "llvm/Object/ObjectFile.h" | |||
26 | #include "llvm/Object/SymbolicFile.h" | |||
27 | #include "llvm/Support/DataExtractor.h" | |||
28 | #include "llvm/Support/Debug.h" | |||
29 | #include "llvm/Support/Error.h" | |||
30 | #include "llvm/Support/ErrorHandling.h" | |||
31 | #include "llvm/Support/Format.h" | |||
32 | #include "llvm/Support/Host.h" | |||
33 | #include "llvm/Support/LEB128.h" | |||
34 | #include "llvm/Support/MemoryBuffer.h" | |||
35 | #include "llvm/Support/SwapByteOrder.h" | |||
36 | #include "llvm/Support/raw_ostream.h" | |||
37 | #include <algorithm> | |||
38 | #include <cassert> | |||
39 | #include <cstddef> | |||
40 | #include <cstdint> | |||
41 | #include <cstring> | |||
42 | #include <limits> | |||
43 | #include <list> | |||
44 | #include <memory> | |||
45 | #include <system_error> | |||
46 | ||||
47 | using namespace llvm; | |||
48 | using namespace object; | |||
49 | ||||
50 | namespace { | |||
51 | ||||
52 | struct section_base { | |||
53 | char sectname[16]; | |||
54 | char segname[16]; | |||
55 | }; | |||
56 | ||||
57 | } // end anonymous namespace | |||
58 | ||||
59 | static Error malformedError(const Twine &Msg) { | |||
60 | return make_error<GenericBinaryError>("truncated or malformed object (" + | |||
61 | Msg + ")", | |||
62 | object_error::parse_failed); | |||
63 | } | |||
64 | ||||
65 | // FIXME: Replace all uses of this function with getStructOrErr. | |||
66 | template <typename T> | |||
67 | static T getStruct(const MachOObjectFile &O, const char *P) { | |||
68 | // Don't read before the beginning or past the end of the file | |||
69 | if (P < O.getData().begin() || P + sizeof(T) > O.getData().end()) | |||
70 | report_fatal_error("Malformed MachO file."); | |||
71 | ||||
72 | T Cmd; | |||
73 | memcpy(&Cmd, P, sizeof(T)); | |||
74 | if (O.isLittleEndian() != sys::IsLittleEndianHost) | |||
75 | MachO::swapStruct(Cmd); | |||
76 | return Cmd; | |||
77 | } | |||
78 | ||||
79 | template <typename T> | |||
80 | static Expected<T> getStructOrErr(const MachOObjectFile &O, const char *P) { | |||
81 | // Don't read before the beginning or past the end of the file | |||
82 | if (P < O.getData().begin() || P + sizeof(T) > O.getData().end()) | |||
83 | return malformedError("Structure read out-of-range"); | |||
84 | ||||
85 | T Cmd; | |||
86 | memcpy(&Cmd, P, sizeof(T)); | |||
87 | if (O.isLittleEndian() != sys::IsLittleEndianHost) | |||
88 | MachO::swapStruct(Cmd); | |||
89 | return Cmd; | |||
90 | } | |||
91 | ||||
92 | static const char * | |||
93 | getSectionPtr(const MachOObjectFile &O, MachOObjectFile::LoadCommandInfo L, | |||
94 | unsigned Sec) { | |||
95 | uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(L.Ptr); | |||
96 | ||||
97 | bool Is64 = O.is64Bit(); | |||
98 | unsigned SegmentLoadSize = Is64 ? sizeof(MachO::segment_command_64) : | |||
99 | sizeof(MachO::segment_command); | |||
100 | unsigned SectionSize = Is64 ? sizeof(MachO::section_64) : | |||
101 | sizeof(MachO::section); | |||
102 | ||||
103 | uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + Sec * SectionSize; | |||
104 | return reinterpret_cast<const char*>(SectionAddr); | |||
105 | } | |||
106 | ||||
107 | static const char *getPtr(const MachOObjectFile &O, size_t Offset) { | |||
108 | assert(Offset <= O.getData().size())((void)0); | |||
109 | return O.getData().data() + Offset; | |||
110 | } | |||
111 | ||||
112 | static MachO::nlist_base | |||
113 | getSymbolTableEntryBase(const MachOObjectFile &O, DataRefImpl DRI) { | |||
114 | const char *P = reinterpret_cast<const char *>(DRI.p); | |||
115 | return getStruct<MachO::nlist_base>(O, P); | |||
116 | } | |||
117 | ||||
118 | static StringRef parseSegmentOrSectionName(const char *P) { | |||
119 | if (P[15] == 0) | |||
120 | // Null terminated. | |||
121 | return P; | |||
122 | // Not null terminated, so this is a 16 char string. | |||
123 | return StringRef(P, 16); | |||
124 | } | |||
125 | ||||
126 | static unsigned getCPUType(const MachOObjectFile &O) { | |||
127 | return O.getHeader().cputype; | |||
128 | } | |||
129 | ||||
130 | static unsigned getCPUSubType(const MachOObjectFile &O) { | |||
131 | return O.getHeader().cpusubtype; | |||
132 | } | |||
133 | ||||
134 | static uint32_t | |||
135 | getPlainRelocationAddress(const MachO::any_relocation_info &RE) { | |||
136 | return RE.r_word0; | |||
137 | } | |||
138 | ||||
139 | static unsigned | |||
140 | getScatteredRelocationAddress(const MachO::any_relocation_info &RE) { | |||
141 | return RE.r_word0 & 0xffffff; | |||
142 | } | |||
143 | ||||
144 | static bool getPlainRelocationPCRel(const MachOObjectFile &O, | |||
145 | const MachO::any_relocation_info &RE) { | |||
146 | if (O.isLittleEndian()) | |||
147 | return (RE.r_word1 >> 24) & 1; | |||
148 | return (RE.r_word1 >> 7) & 1; | |||
149 | } | |||
150 | ||||
151 | static bool | |||
152 | getScatteredRelocationPCRel(const MachO::any_relocation_info &RE) { | |||
153 | return (RE.r_word0 >> 30) & 1; | |||
154 | } | |||
155 | ||||
156 | static unsigned getPlainRelocationLength(const MachOObjectFile &O, | |||
157 | const MachO::any_relocation_info &RE) { | |||
158 | if (O.isLittleEndian()) | |||
159 | return (RE.r_word1 >> 25) & 3; | |||
160 | return (RE.r_word1 >> 5) & 3; | |||
161 | } | |||
162 | ||||
163 | static unsigned | |||
164 | getScatteredRelocationLength(const MachO::any_relocation_info &RE) { | |||
165 | return (RE.r_word0 >> 28) & 3; | |||
166 | } | |||
167 | ||||
168 | static unsigned getPlainRelocationType(const MachOObjectFile &O, | |||
169 | const MachO::any_relocation_info &RE) { | |||
170 | if (O.isLittleEndian()) | |||
171 | return RE.r_word1 >> 28; | |||
172 | return RE.r_word1 & 0xf; | |||
173 | } | |||
174 | ||||
175 | static uint32_t getSectionFlags(const MachOObjectFile &O, | |||
176 | DataRefImpl Sec) { | |||
177 | if (O.is64Bit()) { | |||
178 | MachO::section_64 Sect = O.getSection64(Sec); | |||
179 | return Sect.flags; | |||
180 | } | |||
181 | MachO::section Sect = O.getSection(Sec); | |||
182 | return Sect.flags; | |||
183 | } | |||
184 | ||||
185 | static Expected<MachOObjectFile::LoadCommandInfo> | |||
186 | getLoadCommandInfo(const MachOObjectFile &Obj, const char *Ptr, | |||
187 | uint32_t LoadCommandIndex) { | |||
188 | if (auto CmdOrErr = getStructOrErr<MachO::load_command>(Obj, Ptr)) { | |||
189 | if (CmdOrErr->cmdsize + Ptr > Obj.getData().end()) | |||
190 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
191 | " extends past end of file"); | |||
192 | if (CmdOrErr->cmdsize < 8) | |||
193 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
194 | " with size less than 8 bytes"); | |||
195 | return MachOObjectFile::LoadCommandInfo({Ptr, *CmdOrErr}); | |||
196 | } else | |||
197 | return CmdOrErr.takeError(); | |||
198 | } | |||
199 | ||||
200 | static Expected<MachOObjectFile::LoadCommandInfo> | |||
201 | getFirstLoadCommandInfo(const MachOObjectFile &Obj) { | |||
202 | unsigned HeaderSize = Obj.is64Bit() ? sizeof(MachO::mach_header_64) | |||
203 | : sizeof(MachO::mach_header); | |||
204 | if (sizeof(MachO::load_command) > Obj.getHeader().sizeofcmds) | |||
205 | return malformedError("load command 0 extends past the end all load " | |||
206 | "commands in the file"); | |||
207 | return getLoadCommandInfo(Obj, getPtr(Obj, HeaderSize), 0); | |||
208 | } | |||
209 | ||||
210 | static Expected<MachOObjectFile::LoadCommandInfo> | |||
211 | getNextLoadCommandInfo(const MachOObjectFile &Obj, uint32_t LoadCommandIndex, | |||
212 | const MachOObjectFile::LoadCommandInfo &L) { | |||
213 | unsigned HeaderSize = Obj.is64Bit() ? sizeof(MachO::mach_header_64) | |||
214 | : sizeof(MachO::mach_header); | |||
215 | if (L.Ptr + L.C.cmdsize + sizeof(MachO::load_command) > | |||
216 | Obj.getData().data() + HeaderSize + Obj.getHeader().sizeofcmds) | |||
217 | return malformedError("load command " + Twine(LoadCommandIndex + 1) + | |||
218 | " extends past the end all load commands in the file"); | |||
219 | return getLoadCommandInfo(Obj, L.Ptr + L.C.cmdsize, LoadCommandIndex + 1); | |||
220 | } | |||
221 | ||||
222 | template <typename T> | |||
223 | static void parseHeader(const MachOObjectFile &Obj, T &Header, | |||
224 | Error &Err) { | |||
225 | if (sizeof(T) > Obj.getData().size()) { | |||
226 | Err = malformedError("the mach header extends past the end of the " | |||
227 | "file"); | |||
228 | return; | |||
229 | } | |||
230 | if (auto HeaderOrErr = getStructOrErr<T>(Obj, getPtr(Obj, 0))) | |||
231 | Header = *HeaderOrErr; | |||
232 | else | |||
233 | Err = HeaderOrErr.takeError(); | |||
234 | } | |||
235 | ||||
236 | // This is used to check for overlapping of Mach-O elements. | |||
237 | struct MachOElement { | |||
238 | uint64_t Offset; | |||
239 | uint64_t Size; | |||
240 | const char *Name; | |||
241 | }; | |||
242 | ||||
243 | static Error checkOverlappingElement(std::list<MachOElement> &Elements, | |||
244 | uint64_t Offset, uint64_t Size, | |||
245 | const char *Name) { | |||
246 | if (Size == 0) | |||
247 | return Error::success(); | |||
248 | ||||
249 | for (auto it=Elements.begin() ; it != Elements.end(); ++it) { | |||
250 | auto E = *it; | |||
251 | if ((Offset >= E.Offset && Offset < E.Offset + E.Size) || | |||
252 | (Offset + Size > E.Offset && Offset + Size < E.Offset + E.Size) || | |||
253 | (Offset <= E.Offset && Offset + Size >= E.Offset + E.Size)) | |||
254 | return malformedError(Twine(Name) + " at offset " + Twine(Offset) + | |||
255 | " with a size of " + Twine(Size) + ", overlaps " + | |||
256 | E.Name + " at offset " + Twine(E.Offset) + " with " | |||
257 | "a size of " + Twine(E.Size)); | |||
258 | auto nt = it; | |||
259 | nt++; | |||
260 | if (nt != Elements.end()) { | |||
261 | auto N = *nt; | |||
262 | if (Offset + Size <= N.Offset) { | |||
263 | Elements.insert(nt, {Offset, Size, Name}); | |||
264 | return Error::success(); | |||
265 | } | |||
266 | } | |||
267 | } | |||
268 | Elements.push_back({Offset, Size, Name}); | |||
269 | return Error::success(); | |||
270 | } | |||
271 | ||||
272 | // Parses LC_SEGMENT or LC_SEGMENT_64 load command, adds addresses of all | |||
273 | // sections to \param Sections, and optionally sets | |||
274 | // \param IsPageZeroSegment to true. | |||
275 | template <typename Segment, typename Section> | |||
276 | static Error parseSegmentLoadCommand( | |||
277 | const MachOObjectFile &Obj, const MachOObjectFile::LoadCommandInfo &Load, | |||
278 | SmallVectorImpl<const char *> &Sections, bool &IsPageZeroSegment, | |||
279 | uint32_t LoadCommandIndex, const char *CmdName, uint64_t SizeOfHeaders, | |||
280 | std::list<MachOElement> &Elements) { | |||
281 | const unsigned SegmentLoadSize = sizeof(Segment); | |||
282 | if (Load.C.cmdsize < SegmentLoadSize) | |||
283 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
284 | " " + CmdName + " cmdsize too small"); | |||
285 | if (auto SegOrErr = getStructOrErr<Segment>(Obj, Load.Ptr)) { | |||
286 | Segment S = SegOrErr.get(); | |||
287 | const unsigned SectionSize = sizeof(Section); | |||
288 | uint64_t FileSize = Obj.getData().size(); | |||
289 | if (S.nsects > std::numeric_limits<uint32_t>::max() / SectionSize || | |||
290 | S.nsects * SectionSize > Load.C.cmdsize - SegmentLoadSize) | |||
291 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
292 | " inconsistent cmdsize in " + CmdName + | |||
293 | " for the number of sections"); | |||
294 | for (unsigned J = 0; J < S.nsects; ++J) { | |||
295 | const char *Sec = getSectionPtr(Obj, Load, J); | |||
296 | Sections.push_back(Sec); | |||
297 | auto SectionOrErr = getStructOrErr<Section>(Obj, Sec); | |||
298 | if (!SectionOrErr) | |||
299 | return SectionOrErr.takeError(); | |||
300 | Section s = SectionOrErr.get(); | |||
301 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
302 | Obj.getHeader().filetype != MachO::MH_DSYM && | |||
303 | s.flags != MachO::S_ZEROFILL && | |||
304 | s.flags != MachO::S_THREAD_LOCAL_ZEROFILL && | |||
305 | s.offset > FileSize) | |||
306 | return malformedError("offset field of section " + Twine(J) + " in " + | |||
307 | CmdName + " command " + Twine(LoadCommandIndex) + | |||
308 | " extends past the end of the file"); | |||
309 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
310 | Obj.getHeader().filetype != MachO::MH_DSYM && | |||
311 | s.flags != MachO::S_ZEROFILL && | |||
312 | s.flags != MachO::S_THREAD_LOCAL_ZEROFILL && S.fileoff == 0 && | |||
313 | s.offset < SizeOfHeaders && s.size != 0) | |||
314 | return malformedError("offset field of section " + Twine(J) + " in " + | |||
315 | CmdName + " command " + Twine(LoadCommandIndex) + | |||
316 | " not past the headers of the file"); | |||
317 | uint64_t BigSize = s.offset; | |||
318 | BigSize += s.size; | |||
319 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
320 | Obj.getHeader().filetype != MachO::MH_DSYM && | |||
321 | s.flags != MachO::S_ZEROFILL && | |||
322 | s.flags != MachO::S_THREAD_LOCAL_ZEROFILL && | |||
323 | BigSize > FileSize) | |||
324 | return malformedError("offset field plus size field of section " + | |||
325 | Twine(J) + " in " + CmdName + " command " + | |||
326 | Twine(LoadCommandIndex) + | |||
327 | " extends past the end of the file"); | |||
328 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
329 | Obj.getHeader().filetype != MachO::MH_DSYM && | |||
330 | s.flags != MachO::S_ZEROFILL && | |||
331 | s.flags != MachO::S_THREAD_LOCAL_ZEROFILL && | |||
332 | s.size > S.filesize) | |||
333 | return malformedError("size field of section " + | |||
334 | Twine(J) + " in " + CmdName + " command " + | |||
335 | Twine(LoadCommandIndex) + | |||
336 | " greater than the segment"); | |||
337 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
338 | Obj.getHeader().filetype != MachO::MH_DSYM && s.size != 0 && | |||
339 | s.addr < S.vmaddr) | |||
340 | return malformedError("addr field of section " + Twine(J) + " in " + | |||
341 | CmdName + " command " + Twine(LoadCommandIndex) + | |||
342 | " less than the segment's vmaddr"); | |||
343 | BigSize = s.addr; | |||
344 | BigSize += s.size; | |||
345 | uint64_t BigEnd = S.vmaddr; | |||
346 | BigEnd += S.vmsize; | |||
347 | if (S.vmsize != 0 && s.size != 0 && BigSize > BigEnd) | |||
348 | return malformedError("addr field plus size of section " + Twine(J) + | |||
349 | " in " + CmdName + " command " + | |||
350 | Twine(LoadCommandIndex) + | |||
351 | " greater than than " | |||
352 | "the segment's vmaddr plus vmsize"); | |||
353 | if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB && | |||
354 | Obj.getHeader().filetype != MachO::MH_DSYM && | |||
355 | s.flags != MachO::S_ZEROFILL && | |||
356 | s.flags != MachO::S_THREAD_LOCAL_ZEROFILL) | |||
357 | if (Error Err = checkOverlappingElement(Elements, s.offset, s.size, | |||
358 | "section contents")) | |||
359 | return Err; | |||
360 | if (s.reloff > FileSize) | |||
361 | return malformedError("reloff field of section " + Twine(J) + " in " + | |||
362 | CmdName + " command " + Twine(LoadCommandIndex) + | |||
363 | " extends past the end of the file"); | |||
364 | BigSize = s.nreloc; | |||
365 | BigSize *= sizeof(struct MachO::relocation_info); | |||
366 | BigSize += s.reloff; | |||
367 | if (BigSize > FileSize) | |||
368 | return malformedError("reloff field plus nreloc field times sizeof(" | |||
369 | "struct relocation_info) of section " + | |||
370 | Twine(J) + " in " + CmdName + " command " + | |||
371 | Twine(LoadCommandIndex) + | |||
372 | " extends past the end of the file"); | |||
373 | if (Error Err = checkOverlappingElement(Elements, s.reloff, s.nreloc * | |||
374 | sizeof(struct | |||
375 | MachO::relocation_info), | |||
376 | "section relocation entries")) | |||
377 | return Err; | |||
378 | } | |||
379 | if (S.fileoff > FileSize) | |||
380 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
381 | " fileoff field in " + CmdName + | |||
382 | " extends past the end of the file"); | |||
383 | uint64_t BigSize = S.fileoff; | |||
384 | BigSize += S.filesize; | |||
385 | if (BigSize > FileSize) | |||
386 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
387 | " fileoff field plus filesize field in " + | |||
388 | CmdName + " extends past the end of the file"); | |||
389 | if (S.vmsize != 0 && S.filesize > S.vmsize) | |||
390 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
391 | " filesize field in " + CmdName + | |||
392 | " greater than vmsize field"); | |||
393 | IsPageZeroSegment |= StringRef("__PAGEZERO").equals(S.segname); | |||
394 | } else | |||
395 | return SegOrErr.takeError(); | |||
396 | ||||
397 | return Error::success(); | |||
398 | } | |||
399 | ||||
400 | static Error checkSymtabCommand(const MachOObjectFile &Obj, | |||
401 | const MachOObjectFile::LoadCommandInfo &Load, | |||
402 | uint32_t LoadCommandIndex, | |||
403 | const char **SymtabLoadCmd, | |||
404 | std::list<MachOElement> &Elements) { | |||
405 | if (Load.C.cmdsize < sizeof(MachO::symtab_command)) | |||
406 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
407 | " LC_SYMTAB cmdsize too small"); | |||
408 | if (*SymtabLoadCmd != nullptr) | |||
409 | return malformedError("more than one LC_SYMTAB command"); | |||
410 | auto SymtabOrErr = getStructOrErr<MachO::symtab_command>(Obj, Load.Ptr); | |||
411 | if (!SymtabOrErr) | |||
412 | return SymtabOrErr.takeError(); | |||
413 | MachO::symtab_command Symtab = SymtabOrErr.get(); | |||
414 | if (Symtab.cmdsize != sizeof(MachO::symtab_command)) | |||
415 | return malformedError("LC_SYMTAB command " + Twine(LoadCommandIndex) + | |||
416 | " has incorrect cmdsize"); | |||
417 | uint64_t FileSize = Obj.getData().size(); | |||
418 | if (Symtab.symoff > FileSize) | |||
419 | return malformedError("symoff field of LC_SYMTAB command " + | |||
420 | Twine(LoadCommandIndex) + " extends past the end " | |||
421 | "of the file"); | |||
422 | uint64_t SymtabSize = Symtab.nsyms; | |||
423 | const char *struct_nlist_name; | |||
424 | if (Obj.is64Bit()) { | |||
425 | SymtabSize *= sizeof(MachO::nlist_64); | |||
426 | struct_nlist_name = "struct nlist_64"; | |||
427 | } else { | |||
428 | SymtabSize *= sizeof(MachO::nlist); | |||
429 | struct_nlist_name = "struct nlist"; | |||
430 | } | |||
431 | uint64_t BigSize = SymtabSize; | |||
432 | BigSize += Symtab.symoff; | |||
433 | if (BigSize > FileSize) | |||
434 | return malformedError("symoff field plus nsyms field times sizeof(" + | |||
435 | Twine(struct_nlist_name) + ") of LC_SYMTAB command " + | |||
436 | Twine(LoadCommandIndex) + " extends past the end " | |||
437 | "of the file"); | |||
438 | if (Error Err = checkOverlappingElement(Elements, Symtab.symoff, SymtabSize, | |||
439 | "symbol table")) | |||
440 | return Err; | |||
441 | if (Symtab.stroff > FileSize) | |||
442 | return malformedError("stroff field of LC_SYMTAB command " + | |||
443 | Twine(LoadCommandIndex) + " extends past the end " | |||
444 | "of the file"); | |||
445 | BigSize = Symtab.stroff; | |||
446 | BigSize += Symtab.strsize; | |||
447 | if (BigSize > FileSize) | |||
448 | return malformedError("stroff field plus strsize field of LC_SYMTAB " | |||
449 | "command " + Twine(LoadCommandIndex) + " extends " | |||
450 | "past the end of the file"); | |||
451 | if (Error Err = checkOverlappingElement(Elements, Symtab.stroff, | |||
452 | Symtab.strsize, "string table")) | |||
453 | return Err; | |||
454 | *SymtabLoadCmd = Load.Ptr; | |||
455 | return Error::success(); | |||
456 | } | |||
457 | ||||
458 | static Error checkDysymtabCommand(const MachOObjectFile &Obj, | |||
459 | const MachOObjectFile::LoadCommandInfo &Load, | |||
460 | uint32_t LoadCommandIndex, | |||
461 | const char **DysymtabLoadCmd, | |||
462 | std::list<MachOElement> &Elements) { | |||
463 | if (Load.C.cmdsize < sizeof(MachO::dysymtab_command)) | |||
464 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
465 | " LC_DYSYMTAB cmdsize too small"); | |||
466 | if (*DysymtabLoadCmd != nullptr) | |||
467 | return malformedError("more than one LC_DYSYMTAB command"); | |||
468 | auto DysymtabOrErr = | |||
469 | getStructOrErr<MachO::dysymtab_command>(Obj, Load.Ptr); | |||
470 | if (!DysymtabOrErr) | |||
471 | return DysymtabOrErr.takeError(); | |||
472 | MachO::dysymtab_command Dysymtab = DysymtabOrErr.get(); | |||
473 | if (Dysymtab.cmdsize != sizeof(MachO::dysymtab_command)) | |||
474 | return malformedError("LC_DYSYMTAB command " + Twine(LoadCommandIndex) + | |||
475 | " has incorrect cmdsize"); | |||
476 | uint64_t FileSize = Obj.getData().size(); | |||
477 | if (Dysymtab.tocoff > FileSize) | |||
478 | return malformedError("tocoff field of LC_DYSYMTAB command " + | |||
479 | Twine(LoadCommandIndex) + " extends past the end of " | |||
480 | "the file"); | |||
481 | uint64_t BigSize = Dysymtab.ntoc; | |||
482 | BigSize *= sizeof(MachO::dylib_table_of_contents); | |||
483 | BigSize += Dysymtab.tocoff; | |||
484 | if (BigSize > FileSize) | |||
485 | return malformedError("tocoff field plus ntoc field times sizeof(struct " | |||
486 | "dylib_table_of_contents) of LC_DYSYMTAB command " + | |||
487 | Twine(LoadCommandIndex) + " extends past the end of " | |||
488 | "the file"); | |||
489 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.tocoff, | |||
490 | Dysymtab.ntoc * sizeof(struct | |||
491 | MachO::dylib_table_of_contents), | |||
492 | "table of contents")) | |||
493 | return Err; | |||
494 | if (Dysymtab.modtaboff > FileSize) | |||
495 | return malformedError("modtaboff field of LC_DYSYMTAB command " + | |||
496 | Twine(LoadCommandIndex) + " extends past the end of " | |||
497 | "the file"); | |||
498 | BigSize = Dysymtab.nmodtab; | |||
499 | const char *struct_dylib_module_name; | |||
500 | uint64_t sizeof_modtab; | |||
501 | if (Obj.is64Bit()) { | |||
502 | sizeof_modtab = sizeof(MachO::dylib_module_64); | |||
503 | struct_dylib_module_name = "struct dylib_module_64"; | |||
504 | } else { | |||
505 | sizeof_modtab = sizeof(MachO::dylib_module); | |||
506 | struct_dylib_module_name = "struct dylib_module"; | |||
507 | } | |||
508 | BigSize *= sizeof_modtab; | |||
509 | BigSize += Dysymtab.modtaboff; | |||
510 | if (BigSize > FileSize) | |||
511 | return malformedError("modtaboff field plus nmodtab field times sizeof(" + | |||
512 | Twine(struct_dylib_module_name) + ") of LC_DYSYMTAB " | |||
513 | "command " + Twine(LoadCommandIndex) + " extends " | |||
514 | "past the end of the file"); | |||
515 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.modtaboff, | |||
516 | Dysymtab.nmodtab * sizeof_modtab, | |||
517 | "module table")) | |||
518 | return Err; | |||
519 | if (Dysymtab.extrefsymoff > FileSize) | |||
520 | return malformedError("extrefsymoff field of LC_DYSYMTAB command " + | |||
521 | Twine(LoadCommandIndex) + " extends past the end of " | |||
522 | "the file"); | |||
523 | BigSize = Dysymtab.nextrefsyms; | |||
524 | BigSize *= sizeof(MachO::dylib_reference); | |||
525 | BigSize += Dysymtab.extrefsymoff; | |||
526 | if (BigSize > FileSize) | |||
527 | return malformedError("extrefsymoff field plus nextrefsyms field times " | |||
528 | "sizeof(struct dylib_reference) of LC_DYSYMTAB " | |||
529 | "command " + Twine(LoadCommandIndex) + " extends " | |||
530 | "past the end of the file"); | |||
531 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.extrefsymoff, | |||
532 | Dysymtab.nextrefsyms * | |||
533 | sizeof(MachO::dylib_reference), | |||
534 | "reference table")) | |||
535 | return Err; | |||
536 | if (Dysymtab.indirectsymoff > FileSize) | |||
537 | return malformedError("indirectsymoff field of LC_DYSYMTAB command " + | |||
538 | Twine(LoadCommandIndex) + " extends past the end of " | |||
539 | "the file"); | |||
540 | BigSize = Dysymtab.nindirectsyms; | |||
541 | BigSize *= sizeof(uint32_t); | |||
542 | BigSize += Dysymtab.indirectsymoff; | |||
543 | if (BigSize > FileSize) | |||
544 | return malformedError("indirectsymoff field plus nindirectsyms field times " | |||
545 | "sizeof(uint32_t) of LC_DYSYMTAB command " + | |||
546 | Twine(LoadCommandIndex) + " extends past the end of " | |||
547 | "the file"); | |||
548 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.indirectsymoff, | |||
549 | Dysymtab.nindirectsyms * | |||
550 | sizeof(uint32_t), | |||
551 | "indirect table")) | |||
552 | return Err; | |||
553 | if (Dysymtab.extreloff > FileSize) | |||
554 | return malformedError("extreloff field of LC_DYSYMTAB command " + | |||
555 | Twine(LoadCommandIndex) + " extends past the end of " | |||
556 | "the file"); | |||
557 | BigSize = Dysymtab.nextrel; | |||
558 | BigSize *= sizeof(MachO::relocation_info); | |||
559 | BigSize += Dysymtab.extreloff; | |||
560 | if (BigSize > FileSize) | |||
561 | return malformedError("extreloff field plus nextrel field times sizeof" | |||
562 | "(struct relocation_info) of LC_DYSYMTAB command " + | |||
563 | Twine(LoadCommandIndex) + " extends past the end of " | |||
564 | "the file"); | |||
565 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.extreloff, | |||
566 | Dysymtab.nextrel * | |||
567 | sizeof(MachO::relocation_info), | |||
568 | "external relocation table")) | |||
569 | return Err; | |||
570 | if (Dysymtab.locreloff > FileSize) | |||
571 | return malformedError("locreloff field of LC_DYSYMTAB command " + | |||
572 | Twine(LoadCommandIndex) + " extends past the end of " | |||
573 | "the file"); | |||
574 | BigSize = Dysymtab.nlocrel; | |||
575 | BigSize *= sizeof(MachO::relocation_info); | |||
576 | BigSize += Dysymtab.locreloff; | |||
577 | if (BigSize > FileSize) | |||
578 | return malformedError("locreloff field plus nlocrel field times sizeof" | |||
579 | "(struct relocation_info) of LC_DYSYMTAB command " + | |||
580 | Twine(LoadCommandIndex) + " extends past the end of " | |||
581 | "the file"); | |||
582 | if (Error Err = checkOverlappingElement(Elements, Dysymtab.locreloff, | |||
583 | Dysymtab.nlocrel * | |||
584 | sizeof(MachO::relocation_info), | |||
585 | "local relocation table")) | |||
586 | return Err; | |||
587 | *DysymtabLoadCmd = Load.Ptr; | |||
588 | return Error::success(); | |||
589 | } | |||
590 | ||||
591 | static Error checkLinkeditDataCommand(const MachOObjectFile &Obj, | |||
592 | const MachOObjectFile::LoadCommandInfo &Load, | |||
593 | uint32_t LoadCommandIndex, | |||
594 | const char **LoadCmd, const char *CmdName, | |||
595 | std::list<MachOElement> &Elements, | |||
596 | const char *ElementName) { | |||
597 | if (Load.C.cmdsize < sizeof(MachO::linkedit_data_command)) | |||
598 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
599 | CmdName + " cmdsize too small"); | |||
600 | if (*LoadCmd != nullptr) | |||
601 | return malformedError("more than one " + Twine(CmdName) + " command"); | |||
602 | auto LinkDataOrError = | |||
603 | getStructOrErr<MachO::linkedit_data_command>(Obj, Load.Ptr); | |||
604 | if (!LinkDataOrError) | |||
605 | return LinkDataOrError.takeError(); | |||
606 | MachO::linkedit_data_command LinkData = LinkDataOrError.get(); | |||
607 | if (LinkData.cmdsize != sizeof(MachO::linkedit_data_command)) | |||
608 | return malformedError(Twine(CmdName) + " command " + | |||
609 | Twine(LoadCommandIndex) + " has incorrect cmdsize"); | |||
610 | uint64_t FileSize = Obj.getData().size(); | |||
611 | if (LinkData.dataoff > FileSize) | |||
612 | return malformedError("dataoff field of " + Twine(CmdName) + " command " + | |||
613 | Twine(LoadCommandIndex) + " extends past the end of " | |||
614 | "the file"); | |||
615 | uint64_t BigSize = LinkData.dataoff; | |||
616 | BigSize += LinkData.datasize; | |||
617 | if (BigSize > FileSize) | |||
618 | return malformedError("dataoff field plus datasize field of " + | |||
619 | Twine(CmdName) + " command " + | |||
620 | Twine(LoadCommandIndex) + " extends past the end of " | |||
621 | "the file"); | |||
622 | if (Error Err = checkOverlappingElement(Elements, LinkData.dataoff, | |||
623 | LinkData.datasize, ElementName)) | |||
624 | return Err; | |||
625 | *LoadCmd = Load.Ptr; | |||
626 | return Error::success(); | |||
627 | } | |||
628 | ||||
629 | static Error checkDyldInfoCommand(const MachOObjectFile &Obj, | |||
630 | const MachOObjectFile::LoadCommandInfo &Load, | |||
631 | uint32_t LoadCommandIndex, | |||
632 | const char **LoadCmd, const char *CmdName, | |||
633 | std::list<MachOElement> &Elements) { | |||
634 | if (Load.C.cmdsize < sizeof(MachO::dyld_info_command)) | |||
635 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
636 | CmdName + " cmdsize too small"); | |||
637 | if (*LoadCmd != nullptr) | |||
638 | return malformedError("more than one LC_DYLD_INFO and or LC_DYLD_INFO_ONLY " | |||
639 | "command"); | |||
640 | auto DyldInfoOrErr = | |||
641 | getStructOrErr<MachO::dyld_info_command>(Obj, Load.Ptr); | |||
642 | if (!DyldInfoOrErr) | |||
643 | return DyldInfoOrErr.takeError(); | |||
644 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
645 | if (DyldInfo.cmdsize != sizeof(MachO::dyld_info_command)) | |||
646 | return malformedError(Twine(CmdName) + " command " + | |||
647 | Twine(LoadCommandIndex) + " has incorrect cmdsize"); | |||
648 | uint64_t FileSize = Obj.getData().size(); | |||
649 | if (DyldInfo.rebase_off > FileSize) | |||
650 | return malformedError("rebase_off field of " + Twine(CmdName) + | |||
651 | " command " + Twine(LoadCommandIndex) + " extends " | |||
652 | "past the end of the file"); | |||
653 | uint64_t BigSize = DyldInfo.rebase_off; | |||
654 | BigSize += DyldInfo.rebase_size; | |||
655 | if (BigSize > FileSize) | |||
656 | return malformedError("rebase_off field plus rebase_size field of " + | |||
657 | Twine(CmdName) + " command " + | |||
658 | Twine(LoadCommandIndex) + " extends past the end of " | |||
659 | "the file"); | |||
660 | if (Error Err = checkOverlappingElement(Elements, DyldInfo.rebase_off, | |||
661 | DyldInfo.rebase_size, | |||
662 | "dyld rebase info")) | |||
663 | return Err; | |||
664 | if (DyldInfo.bind_off > FileSize) | |||
665 | return malformedError("bind_off field of " + Twine(CmdName) + | |||
666 | " command " + Twine(LoadCommandIndex) + " extends " | |||
667 | "past the end of the file"); | |||
668 | BigSize = DyldInfo.bind_off; | |||
669 | BigSize += DyldInfo.bind_size; | |||
670 | if (BigSize > FileSize) | |||
671 | return malformedError("bind_off field plus bind_size field of " + | |||
672 | Twine(CmdName) + " command " + | |||
673 | Twine(LoadCommandIndex) + " extends past the end of " | |||
674 | "the file"); | |||
675 | if (Error Err = checkOverlappingElement(Elements, DyldInfo.bind_off, | |||
676 | DyldInfo.bind_size, | |||
677 | "dyld bind info")) | |||
678 | return Err; | |||
679 | if (DyldInfo.weak_bind_off > FileSize) | |||
680 | return malformedError("weak_bind_off field of " + Twine(CmdName) + | |||
681 | " command " + Twine(LoadCommandIndex) + " extends " | |||
682 | "past the end of the file"); | |||
683 | BigSize = DyldInfo.weak_bind_off; | |||
684 | BigSize += DyldInfo.weak_bind_size; | |||
685 | if (BigSize > FileSize) | |||
686 | return malformedError("weak_bind_off field plus weak_bind_size field of " + | |||
687 | Twine(CmdName) + " command " + | |||
688 | Twine(LoadCommandIndex) + " extends past the end of " | |||
689 | "the file"); | |||
690 | if (Error Err = checkOverlappingElement(Elements, DyldInfo.weak_bind_off, | |||
691 | DyldInfo.weak_bind_size, | |||
692 | "dyld weak bind info")) | |||
693 | return Err; | |||
694 | if (DyldInfo.lazy_bind_off > FileSize) | |||
695 | return malformedError("lazy_bind_off field of " + Twine(CmdName) + | |||
696 | " command " + Twine(LoadCommandIndex) + " extends " | |||
697 | "past the end of the file"); | |||
698 | BigSize = DyldInfo.lazy_bind_off; | |||
699 | BigSize += DyldInfo.lazy_bind_size; | |||
700 | if (BigSize > FileSize) | |||
701 | return malformedError("lazy_bind_off field plus lazy_bind_size field of " + | |||
702 | Twine(CmdName) + " command " + | |||
703 | Twine(LoadCommandIndex) + " extends past the end of " | |||
704 | "the file"); | |||
705 | if (Error Err = checkOverlappingElement(Elements, DyldInfo.lazy_bind_off, | |||
706 | DyldInfo.lazy_bind_size, | |||
707 | "dyld lazy bind info")) | |||
708 | return Err; | |||
709 | if (DyldInfo.export_off > FileSize) | |||
710 | return malformedError("export_off field of " + Twine(CmdName) + | |||
711 | " command " + Twine(LoadCommandIndex) + " extends " | |||
712 | "past the end of the file"); | |||
713 | BigSize = DyldInfo.export_off; | |||
714 | BigSize += DyldInfo.export_size; | |||
715 | if (BigSize > FileSize) | |||
716 | return malformedError("export_off field plus export_size field of " + | |||
717 | Twine(CmdName) + " command " + | |||
718 | Twine(LoadCommandIndex) + " extends past the end of " | |||
719 | "the file"); | |||
720 | if (Error Err = checkOverlappingElement(Elements, DyldInfo.export_off, | |||
721 | DyldInfo.export_size, | |||
722 | "dyld export info")) | |||
723 | return Err; | |||
724 | *LoadCmd = Load.Ptr; | |||
725 | return Error::success(); | |||
726 | } | |||
727 | ||||
728 | static Error checkDylibCommand(const MachOObjectFile &Obj, | |||
729 | const MachOObjectFile::LoadCommandInfo &Load, | |||
730 | uint32_t LoadCommandIndex, const char *CmdName) { | |||
731 | if (Load.C.cmdsize < sizeof(MachO::dylib_command)) | |||
732 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
733 | CmdName + " cmdsize too small"); | |||
734 | auto CommandOrErr = getStructOrErr<MachO::dylib_command>(Obj, Load.Ptr); | |||
735 | if (!CommandOrErr) | |||
736 | return CommandOrErr.takeError(); | |||
737 | MachO::dylib_command D = CommandOrErr.get(); | |||
738 | if (D.dylib.name < sizeof(MachO::dylib_command)) | |||
739 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
740 | CmdName + " name.offset field too small, not past " | |||
741 | "the end of the dylib_command struct"); | |||
742 | if (D.dylib.name >= D.cmdsize) | |||
743 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
744 | CmdName + " name.offset field extends past the end " | |||
745 | "of the load command"); | |||
746 | // Make sure there is a null between the starting offset of the name and | |||
747 | // the end of the load command. | |||
748 | uint32_t i; | |||
749 | const char *P = (const char *)Load.Ptr; | |||
750 | for (i = D.dylib.name; i < D.cmdsize; i++) | |||
751 | if (P[i] == '\0') | |||
752 | break; | |||
753 | if (i >= D.cmdsize) | |||
754 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
755 | CmdName + " library name extends past the end of the " | |||
756 | "load command"); | |||
757 | return Error::success(); | |||
758 | } | |||
759 | ||||
760 | static Error checkDylibIdCommand(const MachOObjectFile &Obj, | |||
761 | const MachOObjectFile::LoadCommandInfo &Load, | |||
762 | uint32_t LoadCommandIndex, | |||
763 | const char **LoadCmd) { | |||
764 | if (Error Err = checkDylibCommand(Obj, Load, LoadCommandIndex, | |||
765 | "LC_ID_DYLIB")) | |||
766 | return Err; | |||
767 | if (*LoadCmd != nullptr) | |||
768 | return malformedError("more than one LC_ID_DYLIB command"); | |||
769 | if (Obj.getHeader().filetype != MachO::MH_DYLIB && | |||
770 | Obj.getHeader().filetype != MachO::MH_DYLIB_STUB) | |||
771 | return malformedError("LC_ID_DYLIB load command in non-dynamic library " | |||
772 | "file type"); | |||
773 | *LoadCmd = Load.Ptr; | |||
774 | return Error::success(); | |||
775 | } | |||
776 | ||||
777 | static Error checkDyldCommand(const MachOObjectFile &Obj, | |||
778 | const MachOObjectFile::LoadCommandInfo &Load, | |||
779 | uint32_t LoadCommandIndex, const char *CmdName) { | |||
780 | if (Load.C.cmdsize < sizeof(MachO::dylinker_command)) | |||
781 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
782 | CmdName + " cmdsize too small"); | |||
783 | auto CommandOrErr = getStructOrErr<MachO::dylinker_command>(Obj, Load.Ptr); | |||
784 | if (!CommandOrErr) | |||
785 | return CommandOrErr.takeError(); | |||
786 | MachO::dylinker_command D = CommandOrErr.get(); | |||
787 | if (D.name < sizeof(MachO::dylinker_command)) | |||
788 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
789 | CmdName + " name.offset field too small, not past " | |||
790 | "the end of the dylinker_command struct"); | |||
791 | if (D.name >= D.cmdsize) | |||
792 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
793 | CmdName + " name.offset field extends past the end " | |||
794 | "of the load command"); | |||
795 | // Make sure there is a null between the starting offset of the name and | |||
796 | // the end of the load command. | |||
797 | uint32_t i; | |||
798 | const char *P = (const char *)Load.Ptr; | |||
799 | for (i = D.name; i < D.cmdsize; i++) | |||
800 | if (P[i] == '\0') | |||
801 | break; | |||
802 | if (i >= D.cmdsize) | |||
803 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
804 | CmdName + " dyld name extends past the end of the " | |||
805 | "load command"); | |||
806 | return Error::success(); | |||
807 | } | |||
808 | ||||
809 | static Error checkVersCommand(const MachOObjectFile &Obj, | |||
810 | const MachOObjectFile::LoadCommandInfo &Load, | |||
811 | uint32_t LoadCommandIndex, | |||
812 | const char **LoadCmd, const char *CmdName) { | |||
813 | if (Load.C.cmdsize != sizeof(MachO::version_min_command)) | |||
814 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
815 | CmdName + " has incorrect cmdsize"); | |||
816 | if (*LoadCmd != nullptr) | |||
817 | return malformedError("more than one LC_VERSION_MIN_MACOSX, " | |||
818 | "LC_VERSION_MIN_IPHONEOS, LC_VERSION_MIN_TVOS or " | |||
819 | "LC_VERSION_MIN_WATCHOS command"); | |||
820 | *LoadCmd = Load.Ptr; | |||
821 | return Error::success(); | |||
822 | } | |||
823 | ||||
824 | static Error checkNoteCommand(const MachOObjectFile &Obj, | |||
825 | const MachOObjectFile::LoadCommandInfo &Load, | |||
826 | uint32_t LoadCommandIndex, | |||
827 | std::list<MachOElement> &Elements) { | |||
828 | if (Load.C.cmdsize != sizeof(MachO::note_command)) | |||
829 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
830 | " LC_NOTE has incorrect cmdsize"); | |||
831 | auto NoteCmdOrErr = getStructOrErr<MachO::note_command>(Obj, Load.Ptr); | |||
832 | if (!NoteCmdOrErr) | |||
833 | return NoteCmdOrErr.takeError(); | |||
834 | MachO::note_command Nt = NoteCmdOrErr.get(); | |||
835 | uint64_t FileSize = Obj.getData().size(); | |||
836 | if (Nt.offset > FileSize) | |||
837 | return malformedError("offset field of LC_NOTE command " + | |||
838 | Twine(LoadCommandIndex) + " extends " | |||
839 | "past the end of the file"); | |||
840 | uint64_t BigSize = Nt.offset; | |||
841 | BigSize += Nt.size; | |||
842 | if (BigSize > FileSize) | |||
843 | return malformedError("size field plus offset field of LC_NOTE command " + | |||
844 | Twine(LoadCommandIndex) + " extends past the end of " | |||
845 | "the file"); | |||
846 | if (Error Err = checkOverlappingElement(Elements, Nt.offset, Nt.size, | |||
847 | "LC_NOTE data")) | |||
848 | return Err; | |||
849 | return Error::success(); | |||
850 | } | |||
851 | ||||
852 | static Error | |||
853 | parseBuildVersionCommand(const MachOObjectFile &Obj, | |||
854 | const MachOObjectFile::LoadCommandInfo &Load, | |||
855 | SmallVectorImpl<const char*> &BuildTools, | |||
856 | uint32_t LoadCommandIndex) { | |||
857 | auto BVCOrErr = | |||
858 | getStructOrErr<MachO::build_version_command>(Obj, Load.Ptr); | |||
859 | if (!BVCOrErr) | |||
860 | return BVCOrErr.takeError(); | |||
861 | MachO::build_version_command BVC = BVCOrErr.get(); | |||
862 | if (Load.C.cmdsize != | |||
863 | sizeof(MachO::build_version_command) + | |||
864 | BVC.ntools * sizeof(MachO::build_tool_version)) | |||
865 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
866 | " LC_BUILD_VERSION_COMMAND has incorrect cmdsize"); | |||
867 | ||||
868 | auto Start = Load.Ptr + sizeof(MachO::build_version_command); | |||
869 | BuildTools.resize(BVC.ntools); | |||
870 | for (unsigned i = 0; i < BVC.ntools; ++i) | |||
871 | BuildTools[i] = Start + i * sizeof(MachO::build_tool_version); | |||
872 | ||||
873 | return Error::success(); | |||
874 | } | |||
875 | ||||
876 | static Error checkRpathCommand(const MachOObjectFile &Obj, | |||
877 | const MachOObjectFile::LoadCommandInfo &Load, | |||
878 | uint32_t LoadCommandIndex) { | |||
879 | if (Load.C.cmdsize < sizeof(MachO::rpath_command)) | |||
880 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
881 | " LC_RPATH cmdsize too small"); | |||
882 | auto ROrErr = getStructOrErr<MachO::rpath_command>(Obj, Load.Ptr); | |||
883 | if (!ROrErr) | |||
884 | return ROrErr.takeError(); | |||
885 | MachO::rpath_command R = ROrErr.get(); | |||
886 | if (R.path < sizeof(MachO::rpath_command)) | |||
887 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
888 | " LC_RPATH path.offset field too small, not past " | |||
889 | "the end of the rpath_command struct"); | |||
890 | if (R.path >= R.cmdsize) | |||
891 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
892 | " LC_RPATH path.offset field extends past the end " | |||
893 | "of the load command"); | |||
894 | // Make sure there is a null between the starting offset of the path and | |||
895 | // the end of the load command. | |||
896 | uint32_t i; | |||
897 | const char *P = (const char *)Load.Ptr; | |||
898 | for (i = R.path; i < R.cmdsize; i++) | |||
899 | if (P[i] == '\0') | |||
900 | break; | |||
901 | if (i >= R.cmdsize) | |||
902 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
903 | " LC_RPATH library name extends past the end of the " | |||
904 | "load command"); | |||
905 | return Error::success(); | |||
906 | } | |||
907 | ||||
908 | static Error checkEncryptCommand(const MachOObjectFile &Obj, | |||
909 | const MachOObjectFile::LoadCommandInfo &Load, | |||
910 | uint32_t LoadCommandIndex, | |||
911 | uint64_t cryptoff, uint64_t cryptsize, | |||
912 | const char **LoadCmd, const char *CmdName) { | |||
913 | if (*LoadCmd != nullptr) | |||
914 | return malformedError("more than one LC_ENCRYPTION_INFO and or " | |||
915 | "LC_ENCRYPTION_INFO_64 command"); | |||
916 | uint64_t FileSize = Obj.getData().size(); | |||
917 | if (cryptoff > FileSize) | |||
918 | return malformedError("cryptoff field of " + Twine(CmdName) + | |||
919 | " command " + Twine(LoadCommandIndex) + " extends " | |||
920 | "past the end of the file"); | |||
921 | uint64_t BigSize = cryptoff; | |||
922 | BigSize += cryptsize; | |||
923 | if (BigSize > FileSize) | |||
924 | return malformedError("cryptoff field plus cryptsize field of " + | |||
925 | Twine(CmdName) + " command " + | |||
926 | Twine(LoadCommandIndex) + " extends past the end of " | |||
927 | "the file"); | |||
928 | *LoadCmd = Load.Ptr; | |||
929 | return Error::success(); | |||
930 | } | |||
931 | ||||
932 | static Error checkLinkerOptCommand(const MachOObjectFile &Obj, | |||
933 | const MachOObjectFile::LoadCommandInfo &Load, | |||
934 | uint32_t LoadCommandIndex) { | |||
935 | if (Load.C.cmdsize < sizeof(MachO::linker_option_command)) | |||
936 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
937 | " LC_LINKER_OPTION cmdsize too small"); | |||
938 | auto LinkOptionOrErr = | |||
939 | getStructOrErr<MachO::linker_option_command>(Obj, Load.Ptr); | |||
940 | if (!LinkOptionOrErr) | |||
941 | return LinkOptionOrErr.takeError(); | |||
942 | MachO::linker_option_command L = LinkOptionOrErr.get(); | |||
943 | // Make sure the count of strings is correct. | |||
944 | const char *string = (const char *)Load.Ptr + | |||
945 | sizeof(struct MachO::linker_option_command); | |||
946 | uint32_t left = L.cmdsize - sizeof(struct MachO::linker_option_command); | |||
947 | uint32_t i = 0; | |||
948 | while (left > 0) { | |||
949 | while (*string == '\0' && left > 0) { | |||
950 | string++; | |||
951 | left--; | |||
952 | } | |||
953 | if (left > 0) { | |||
954 | i++; | |||
955 | uint32_t NullPos = StringRef(string, left).find('\0'); | |||
956 | if (0xffffffff == NullPos) | |||
957 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
958 | " LC_LINKER_OPTION string #" + Twine(i) + | |||
959 | " is not NULL terminated"); | |||
960 | uint32_t len = std::min(NullPos, left) + 1; | |||
961 | string += len; | |||
962 | left -= len; | |||
963 | } | |||
964 | } | |||
965 | if (L.count != i) | |||
966 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
967 | " LC_LINKER_OPTION string count " + Twine(L.count) + | |||
968 | " does not match number of strings"); | |||
969 | return Error::success(); | |||
970 | } | |||
971 | ||||
972 | static Error checkSubCommand(const MachOObjectFile &Obj, | |||
973 | const MachOObjectFile::LoadCommandInfo &Load, | |||
974 | uint32_t LoadCommandIndex, const char *CmdName, | |||
975 | size_t SizeOfCmd, const char *CmdStructName, | |||
976 | uint32_t PathOffset, const char *PathFieldName) { | |||
977 | if (PathOffset < SizeOfCmd) | |||
978 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
979 | CmdName + " " + PathFieldName + ".offset field too " | |||
980 | "small, not past the end of the " + CmdStructName); | |||
981 | if (PathOffset >= Load.C.cmdsize) | |||
982 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
983 | CmdName + " " + PathFieldName + ".offset field " | |||
984 | "extends past the end of the load command"); | |||
985 | // Make sure there is a null between the starting offset of the path and | |||
986 | // the end of the load command. | |||
987 | uint32_t i; | |||
988 | const char *P = (const char *)Load.Ptr; | |||
989 | for (i = PathOffset; i < Load.C.cmdsize; i++) | |||
990 | if (P[i] == '\0') | |||
991 | break; | |||
992 | if (i >= Load.C.cmdsize) | |||
993 | return malformedError("load command " + Twine(LoadCommandIndex) + " " + | |||
994 | CmdName + " " + PathFieldName + " name extends past " | |||
995 | "the end of the load command"); | |||
996 | return Error::success(); | |||
997 | } | |||
998 | ||||
999 | static Error checkThreadCommand(const MachOObjectFile &Obj, | |||
1000 | const MachOObjectFile::LoadCommandInfo &Load, | |||
1001 | uint32_t LoadCommandIndex, | |||
1002 | const char *CmdName) { | |||
1003 | if (Load.C.cmdsize < sizeof(MachO::thread_command)) | |||
1004 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1005 | CmdName + " cmdsize too small"); | |||
1006 | auto ThreadCommandOrErr = | |||
1007 | getStructOrErr<MachO::thread_command>(Obj, Load.Ptr); | |||
1008 | if (!ThreadCommandOrErr) | |||
1009 | return ThreadCommandOrErr.takeError(); | |||
1010 | MachO::thread_command T = ThreadCommandOrErr.get(); | |||
1011 | const char *state = Load.Ptr + sizeof(MachO::thread_command); | |||
1012 | const char *end = Load.Ptr + T.cmdsize; | |||
1013 | uint32_t nflavor = 0; | |||
1014 | uint32_t cputype = getCPUType(Obj); | |||
1015 | while (state < end) { | |||
1016 | if(state + sizeof(uint32_t) > end) | |||
1017 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1018 | "flavor in " + CmdName + " extends past end of " | |||
1019 | "command"); | |||
1020 | uint32_t flavor; | |||
1021 | memcpy(&flavor, state, sizeof(uint32_t)); | |||
1022 | if (Obj.isLittleEndian() != sys::IsLittleEndianHost) | |||
1023 | sys::swapByteOrder(flavor); | |||
1024 | state += sizeof(uint32_t); | |||
1025 | ||||
1026 | if(state + sizeof(uint32_t) > end) | |||
1027 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1028 | " count in " + CmdName + " extends past end of " | |||
1029 | "command"); | |||
1030 | uint32_t count; | |||
1031 | memcpy(&count, state, sizeof(uint32_t)); | |||
1032 | if (Obj.isLittleEndian() != sys::IsLittleEndianHost) | |||
1033 | sys::swapByteOrder(count); | |||
1034 | state += sizeof(uint32_t); | |||
1035 | ||||
1036 | if (cputype == MachO::CPU_TYPE_I386) { | |||
1037 | if (flavor == MachO::x86_THREAD_STATE32) { | |||
1038 | if (count != MachO::x86_THREAD_STATE32_COUNT) | |||
1039 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1040 | " count not x86_THREAD_STATE32_COUNT for " | |||
1041 | "flavor number " + Twine(nflavor) + " which is " | |||
1042 | "a x86_THREAD_STATE32 flavor in " + CmdName + | |||
1043 | " command"); | |||
1044 | if (state + sizeof(MachO::x86_thread_state32_t) > end) | |||
1045 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1046 | " x86_THREAD_STATE32 extends past end of " | |||
1047 | "command in " + CmdName + " command"); | |||
1048 | state += sizeof(MachO::x86_thread_state32_t); | |||
1049 | } else { | |||
1050 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1051 | " unknown flavor (" + Twine(flavor) + ") for " | |||
1052 | "flavor number " + Twine(nflavor) + " in " + | |||
1053 | CmdName + " command"); | |||
1054 | } | |||
1055 | } else if (cputype == MachO::CPU_TYPE_X86_64) { | |||
1056 | if (flavor == MachO::x86_THREAD_STATE) { | |||
1057 | if (count != MachO::x86_THREAD_STATE_COUNT) | |||
1058 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1059 | " count not x86_THREAD_STATE_COUNT for " | |||
1060 | "flavor number " + Twine(nflavor) + " which is " | |||
1061 | "a x86_THREAD_STATE flavor in " + CmdName + | |||
1062 | " command"); | |||
1063 | if (state + sizeof(MachO::x86_thread_state_t) > end) | |||
1064 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1065 | " x86_THREAD_STATE extends past end of " | |||
1066 | "command in " + CmdName + " command"); | |||
1067 | state += sizeof(MachO::x86_thread_state_t); | |||
1068 | } else if (flavor == MachO::x86_FLOAT_STATE) { | |||
1069 | if (count != MachO::x86_FLOAT_STATE_COUNT) | |||
1070 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1071 | " count not x86_FLOAT_STATE_COUNT for " | |||
1072 | "flavor number " + Twine(nflavor) + " which is " | |||
1073 | "a x86_FLOAT_STATE flavor in " + CmdName + | |||
1074 | " command"); | |||
1075 | if (state + sizeof(MachO::x86_float_state_t) > end) | |||
1076 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1077 | " x86_FLOAT_STATE extends past end of " | |||
1078 | "command in " + CmdName + " command"); | |||
1079 | state += sizeof(MachO::x86_float_state_t); | |||
1080 | } else if (flavor == MachO::x86_EXCEPTION_STATE) { | |||
1081 | if (count != MachO::x86_EXCEPTION_STATE_COUNT) | |||
1082 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1083 | " count not x86_EXCEPTION_STATE_COUNT for " | |||
1084 | "flavor number " + Twine(nflavor) + " which is " | |||
1085 | "a x86_EXCEPTION_STATE flavor in " + CmdName + | |||
1086 | " command"); | |||
1087 | if (state + sizeof(MachO::x86_exception_state_t) > end) | |||
1088 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1089 | " x86_EXCEPTION_STATE extends past end of " | |||
1090 | "command in " + CmdName + " command"); | |||
1091 | state += sizeof(MachO::x86_exception_state_t); | |||
1092 | } else if (flavor == MachO::x86_THREAD_STATE64) { | |||
1093 | if (count != MachO::x86_THREAD_STATE64_COUNT) | |||
1094 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1095 | " count not x86_THREAD_STATE64_COUNT for " | |||
1096 | "flavor number " + Twine(nflavor) + " which is " | |||
1097 | "a x86_THREAD_STATE64 flavor in " + CmdName + | |||
1098 | " command"); | |||
1099 | if (state + sizeof(MachO::x86_thread_state64_t) > end) | |||
1100 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1101 | " x86_THREAD_STATE64 extends past end of " | |||
1102 | "command in " + CmdName + " command"); | |||
1103 | state += sizeof(MachO::x86_thread_state64_t); | |||
1104 | } else if (flavor == MachO::x86_EXCEPTION_STATE64) { | |||
1105 | if (count != MachO::x86_EXCEPTION_STATE64_COUNT) | |||
1106 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1107 | " count not x86_EXCEPTION_STATE64_COUNT for " | |||
1108 | "flavor number " + Twine(nflavor) + " which is " | |||
1109 | "a x86_EXCEPTION_STATE64 flavor in " + CmdName + | |||
1110 | " command"); | |||
1111 | if (state + sizeof(MachO::x86_exception_state64_t) > end) | |||
1112 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1113 | " x86_EXCEPTION_STATE64 extends past end of " | |||
1114 | "command in " + CmdName + " command"); | |||
1115 | state += sizeof(MachO::x86_exception_state64_t); | |||
1116 | } else { | |||
1117 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1118 | " unknown flavor (" + Twine(flavor) + ") for " | |||
1119 | "flavor number " + Twine(nflavor) + " in " + | |||
1120 | CmdName + " command"); | |||
1121 | } | |||
1122 | } else if (cputype == MachO::CPU_TYPE_ARM) { | |||
1123 | if (flavor == MachO::ARM_THREAD_STATE) { | |||
1124 | if (count != MachO::ARM_THREAD_STATE_COUNT) | |||
1125 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1126 | " count not ARM_THREAD_STATE_COUNT for " | |||
1127 | "flavor number " + Twine(nflavor) + " which is " | |||
1128 | "a ARM_THREAD_STATE flavor in " + CmdName + | |||
1129 | " command"); | |||
1130 | if (state + sizeof(MachO::arm_thread_state32_t) > end) | |||
1131 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1132 | " ARM_THREAD_STATE extends past end of " | |||
1133 | "command in " + CmdName + " command"); | |||
1134 | state += sizeof(MachO::arm_thread_state32_t); | |||
1135 | } else { | |||
1136 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1137 | " unknown flavor (" + Twine(flavor) + ") for " | |||
1138 | "flavor number " + Twine(nflavor) + " in " + | |||
1139 | CmdName + " command"); | |||
1140 | } | |||
1141 | } else if (cputype == MachO::CPU_TYPE_ARM64 || | |||
1142 | cputype == MachO::CPU_TYPE_ARM64_32) { | |||
1143 | if (flavor == MachO::ARM_THREAD_STATE64) { | |||
1144 | if (count != MachO::ARM_THREAD_STATE64_COUNT) | |||
1145 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1146 | " count not ARM_THREAD_STATE64_COUNT for " | |||
1147 | "flavor number " + Twine(nflavor) + " which is " | |||
1148 | "a ARM_THREAD_STATE64 flavor in " + CmdName + | |||
1149 | " command"); | |||
1150 | if (state + sizeof(MachO::arm_thread_state64_t) > end) | |||
1151 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1152 | " ARM_THREAD_STATE64 extends past end of " | |||
1153 | "command in " + CmdName + " command"); | |||
1154 | state += sizeof(MachO::arm_thread_state64_t); | |||
1155 | } else { | |||
1156 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1157 | " unknown flavor (" + Twine(flavor) + ") for " | |||
1158 | "flavor number " + Twine(nflavor) + " in " + | |||
1159 | CmdName + " command"); | |||
1160 | } | |||
1161 | } else if (cputype == MachO::CPU_TYPE_POWERPC) { | |||
1162 | if (flavor == MachO::PPC_THREAD_STATE) { | |||
1163 | if (count != MachO::PPC_THREAD_STATE_COUNT) | |||
1164 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1165 | " count not PPC_THREAD_STATE_COUNT for " | |||
1166 | "flavor number " + Twine(nflavor) + " which is " | |||
1167 | "a PPC_THREAD_STATE flavor in " + CmdName + | |||
1168 | " command"); | |||
1169 | if (state + sizeof(MachO::ppc_thread_state32_t) > end) | |||
1170 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1171 | " PPC_THREAD_STATE extends past end of " | |||
1172 | "command in " + CmdName + " command"); | |||
1173 | state += sizeof(MachO::ppc_thread_state32_t); | |||
1174 | } else { | |||
1175 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1176 | " unknown flavor (" + Twine(flavor) + ") for " | |||
1177 | "flavor number " + Twine(nflavor) + " in " + | |||
1178 | CmdName + " command"); | |||
1179 | } | |||
1180 | } else { | |||
1181 | return malformedError("unknown cputype (" + Twine(cputype) + ") load " | |||
1182 | "command " + Twine(LoadCommandIndex) + " for " + | |||
1183 | CmdName + " command can't be checked"); | |||
1184 | } | |||
1185 | nflavor++; | |||
1186 | } | |||
1187 | return Error::success(); | |||
1188 | } | |||
1189 | ||||
1190 | static Error checkTwoLevelHintsCommand(const MachOObjectFile &Obj, | |||
1191 | const MachOObjectFile::LoadCommandInfo | |||
1192 | &Load, | |||
1193 | uint32_t LoadCommandIndex, | |||
1194 | const char **LoadCmd, | |||
1195 | std::list<MachOElement> &Elements) { | |||
1196 | if (Load.C.cmdsize != sizeof(MachO::twolevel_hints_command)) | |||
1197 | return malformedError("load command " + Twine(LoadCommandIndex) + | |||
1198 | " LC_TWOLEVEL_HINTS has incorrect cmdsize"); | |||
1199 | if (*LoadCmd != nullptr) | |||
1200 | return malformedError("more than one LC_TWOLEVEL_HINTS command"); | |||
1201 | auto HintsOrErr = getStructOrErr<MachO::twolevel_hints_command>(Obj, Load.Ptr); | |||
1202 | if(!HintsOrErr) | |||
1203 | return HintsOrErr.takeError(); | |||
1204 | MachO::twolevel_hints_command Hints = HintsOrErr.get(); | |||
1205 | uint64_t FileSize = Obj.getData().size(); | |||
1206 | if (Hints.offset > FileSize) | |||
1207 | return malformedError("offset field of LC_TWOLEVEL_HINTS command " + | |||
1208 | Twine(LoadCommandIndex) + " extends past the end of " | |||
1209 | "the file"); | |||
1210 | uint64_t BigSize = Hints.nhints; | |||
1211 | BigSize *= sizeof(MachO::twolevel_hint); | |||
1212 | BigSize += Hints.offset; | |||
1213 | if (BigSize > FileSize) | |||
1214 | return malformedError("offset field plus nhints times sizeof(struct " | |||
1215 | "twolevel_hint) field of LC_TWOLEVEL_HINTS command " + | |||
1216 | Twine(LoadCommandIndex) + " extends past the end of " | |||
1217 | "the file"); | |||
1218 | if (Error Err = checkOverlappingElement(Elements, Hints.offset, Hints.nhints * | |||
1219 | sizeof(MachO::twolevel_hint), | |||
1220 | "two level hints")) | |||
1221 | return Err; | |||
1222 | *LoadCmd = Load.Ptr; | |||
1223 | return Error::success(); | |||
1224 | } | |||
1225 | ||||
1226 | // Returns true if the libObject code does not support the load command and its | |||
1227 | // contents. The cmd value it is treated as an unknown load command but with | |||
1228 | // an error message that says the cmd value is obsolete. | |||
1229 | static bool isLoadCommandObsolete(uint32_t cmd) { | |||
1230 | if (cmd == MachO::LC_SYMSEG || | |||
1231 | cmd == MachO::LC_LOADFVMLIB || | |||
1232 | cmd == MachO::LC_IDFVMLIB || | |||
1233 | cmd == MachO::LC_IDENT || | |||
1234 | cmd == MachO::LC_FVMFILE || | |||
1235 | cmd == MachO::LC_PREPAGE || | |||
1236 | cmd == MachO::LC_PREBOUND_DYLIB || | |||
1237 | cmd == MachO::LC_TWOLEVEL_HINTS || | |||
1238 | cmd == MachO::LC_PREBIND_CKSUM) | |||
1239 | return true; | |||
1240 | return false; | |||
1241 | } | |||
1242 | ||||
1243 | Expected<std::unique_ptr<MachOObjectFile>> | |||
1244 | MachOObjectFile::create(MemoryBufferRef Object, bool IsLittleEndian, | |||
1245 | bool Is64Bits, uint32_t UniversalCputype, | |||
1246 | uint32_t UniversalIndex) { | |||
1247 | Error Err = Error::success(); | |||
1248 | std::unique_ptr<MachOObjectFile> Obj( | |||
1249 | new MachOObjectFile(std::move(Object), IsLittleEndian, | |||
1250 | Is64Bits, Err, UniversalCputype, | |||
1251 | UniversalIndex)); | |||
1252 | if (Err) | |||
1253 | return std::move(Err); | |||
1254 | return std::move(Obj); | |||
1255 | } | |||
1256 | ||||
1257 | MachOObjectFile::MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian, | |||
1258 | bool Is64bits, Error &Err, | |||
1259 | uint32_t UniversalCputype, | |||
1260 | uint32_t UniversalIndex) | |||
1261 | : ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object) { | |||
1262 | ErrorAsOutParameter ErrAsOutParam(&Err); | |||
1263 | uint64_t SizeOfHeaders; | |||
1264 | uint32_t cputype; | |||
1265 | if (is64Bit()) { | |||
1266 | parseHeader(*this, Header64, Err); | |||
1267 | SizeOfHeaders = sizeof(MachO::mach_header_64); | |||
1268 | cputype = Header64.cputype; | |||
1269 | } else { | |||
1270 | parseHeader(*this, Header, Err); | |||
1271 | SizeOfHeaders = sizeof(MachO::mach_header); | |||
1272 | cputype = Header.cputype; | |||
1273 | } | |||
1274 | if (Err) | |||
1275 | return; | |||
1276 | SizeOfHeaders += getHeader().sizeofcmds; | |||
1277 | if (getData().data() + SizeOfHeaders > getData().end()) { | |||
1278 | Err = malformedError("load commands extend past the end of the file"); | |||
1279 | return; | |||
1280 | } | |||
1281 | if (UniversalCputype != 0 && cputype != UniversalCputype) { | |||
1282 | Err = malformedError("universal header architecture: " + | |||
1283 | Twine(UniversalIndex) + "'s cputype does not match " | |||
1284 | "object file's mach header"); | |||
1285 | return; | |||
1286 | } | |||
1287 | std::list<MachOElement> Elements; | |||
1288 | Elements.push_back({0, SizeOfHeaders, "Mach-O headers"}); | |||
1289 | ||||
1290 | uint32_t LoadCommandCount = getHeader().ncmds; | |||
1291 | LoadCommandInfo Load; | |||
1292 | if (LoadCommandCount != 0) { | |||
1293 | if (auto LoadOrErr = getFirstLoadCommandInfo(*this)) | |||
1294 | Load = *LoadOrErr; | |||
1295 | else { | |||
1296 | Err = LoadOrErr.takeError(); | |||
1297 | return; | |||
1298 | } | |||
1299 | } | |||
1300 | ||||
1301 | const char *DyldIdLoadCmd = nullptr; | |||
1302 | const char *FuncStartsLoadCmd = nullptr; | |||
1303 | const char *SplitInfoLoadCmd = nullptr; | |||
1304 | const char *CodeSignDrsLoadCmd = nullptr; | |||
1305 | const char *CodeSignLoadCmd = nullptr; | |||
1306 | const char *VersLoadCmd = nullptr; | |||
1307 | const char *SourceLoadCmd = nullptr; | |||
1308 | const char *EntryPointLoadCmd = nullptr; | |||
1309 | const char *EncryptLoadCmd = nullptr; | |||
1310 | const char *RoutinesLoadCmd = nullptr; | |||
1311 | const char *UnixThreadLoadCmd = nullptr; | |||
1312 | const char *TwoLevelHintsLoadCmd = nullptr; | |||
1313 | for (unsigned I = 0; I < LoadCommandCount; ++I) { | |||
1314 | if (is64Bit()) { | |||
1315 | if (Load.C.cmdsize % 8 != 0) { | |||
1316 | // We have a hack here to allow 64-bit Mach-O core files to have | |||
1317 | // LC_THREAD commands that are only a multiple of 4 and not 8 to be | |||
1318 | // allowed since the macOS kernel produces them. | |||
1319 | if (getHeader().filetype != MachO::MH_CORE || | |||
1320 | Load.C.cmd != MachO::LC_THREAD || Load.C.cmdsize % 4) { | |||
1321 | Err = malformedError("load command " + Twine(I) + " cmdsize not a " | |||
1322 | "multiple of 8"); | |||
1323 | return; | |||
1324 | } | |||
1325 | } | |||
1326 | } else { | |||
1327 | if (Load.C.cmdsize % 4 != 0) { | |||
1328 | Err = malformedError("load command " + Twine(I) + " cmdsize not a " | |||
1329 | "multiple of 4"); | |||
1330 | return; | |||
1331 | } | |||
1332 | } | |||
1333 | LoadCommands.push_back(Load); | |||
1334 | if (Load.C.cmd == MachO::LC_SYMTAB) { | |||
1335 | if ((Err = checkSymtabCommand(*this, Load, I, &SymtabLoadCmd, Elements))) | |||
1336 | return; | |||
1337 | } else if (Load.C.cmd == MachO::LC_DYSYMTAB) { | |||
1338 | if ((Err = checkDysymtabCommand(*this, Load, I, &DysymtabLoadCmd, | |||
1339 | Elements))) | |||
1340 | return; | |||
1341 | } else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) { | |||
1342 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &DataInCodeLoadCmd, | |||
1343 | "LC_DATA_IN_CODE", Elements, | |||
1344 | "data in code info"))) | |||
1345 | return; | |||
1346 | } else if (Load.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) { | |||
1347 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &LinkOptHintsLoadCmd, | |||
1348 | "LC_LINKER_OPTIMIZATION_HINT", | |||
1349 | Elements, "linker optimization " | |||
1350 | "hints"))) | |||
1351 | return; | |||
1352 | } else if (Load.C.cmd == MachO::LC_FUNCTION_STARTS) { | |||
1353 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &FuncStartsLoadCmd, | |||
1354 | "LC_FUNCTION_STARTS", Elements, | |||
1355 | "function starts data"))) | |||
1356 | return; | |||
1357 | } else if (Load.C.cmd == MachO::LC_SEGMENT_SPLIT_INFO) { | |||
1358 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &SplitInfoLoadCmd, | |||
1359 | "LC_SEGMENT_SPLIT_INFO", Elements, | |||
1360 | "split info data"))) | |||
1361 | return; | |||
1362 | } else if (Load.C.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS) { | |||
1363 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &CodeSignDrsLoadCmd, | |||
1364 | "LC_DYLIB_CODE_SIGN_DRS", Elements, | |||
1365 | "code signing RDs data"))) | |||
1366 | return; | |||
1367 | } else if (Load.C.cmd == MachO::LC_CODE_SIGNATURE) { | |||
1368 | if ((Err = checkLinkeditDataCommand(*this, Load, I, &CodeSignLoadCmd, | |||
1369 | "LC_CODE_SIGNATURE", Elements, | |||
1370 | "code signature data"))) | |||
1371 | return; | |||
1372 | } else if (Load.C.cmd == MachO::LC_DYLD_INFO) { | |||
1373 | if ((Err = checkDyldInfoCommand(*this, Load, I, &DyldInfoLoadCmd, | |||
1374 | "LC_DYLD_INFO", Elements))) | |||
1375 | return; | |||
1376 | } else if (Load.C.cmd == MachO::LC_DYLD_INFO_ONLY) { | |||
1377 | if ((Err = checkDyldInfoCommand(*this, Load, I, &DyldInfoLoadCmd, | |||
1378 | "LC_DYLD_INFO_ONLY", Elements))) | |||
1379 | return; | |||
1380 | } else if (Load.C.cmd == MachO::LC_UUID) { | |||
1381 | if (Load.C.cmdsize != sizeof(MachO::uuid_command)) { | |||
1382 | Err = malformedError("LC_UUID command " + Twine(I) + " has incorrect " | |||
1383 | "cmdsize"); | |||
1384 | return; | |||
1385 | } | |||
1386 | if (UuidLoadCmd) { | |||
1387 | Err = malformedError("more than one LC_UUID command"); | |||
1388 | return; | |||
1389 | } | |||
1390 | UuidLoadCmd = Load.Ptr; | |||
1391 | } else if (Load.C.cmd == MachO::LC_SEGMENT_64) { | |||
1392 | if ((Err = parseSegmentLoadCommand<MachO::segment_command_64, | |||
1393 | MachO::section_64>( | |||
1394 | *this, Load, Sections, HasPageZeroSegment, I, | |||
1395 | "LC_SEGMENT_64", SizeOfHeaders, Elements))) | |||
1396 | return; | |||
1397 | } else if (Load.C.cmd == MachO::LC_SEGMENT) { | |||
1398 | if ((Err = parseSegmentLoadCommand<MachO::segment_command, | |||
1399 | MachO::section>( | |||
1400 | *this, Load, Sections, HasPageZeroSegment, I, | |||
1401 | "LC_SEGMENT", SizeOfHeaders, Elements))) | |||
1402 | return; | |||
1403 | } else if (Load.C.cmd == MachO::LC_ID_DYLIB) { | |||
1404 | if ((Err = checkDylibIdCommand(*this, Load, I, &DyldIdLoadCmd))) | |||
1405 | return; | |||
1406 | } else if (Load.C.cmd == MachO::LC_LOAD_DYLIB) { | |||
1407 | if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_DYLIB"))) | |||
1408 | return; | |||
1409 | Libraries.push_back(Load.Ptr); | |||
1410 | } else if (Load.C.cmd == MachO::LC_LOAD_WEAK_DYLIB) { | |||
1411 | if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_WEAK_DYLIB"))) | |||
1412 | return; | |||
1413 | Libraries.push_back(Load.Ptr); | |||
1414 | } else if (Load.C.cmd == MachO::LC_LAZY_LOAD_DYLIB) { | |||
1415 | if ((Err = checkDylibCommand(*this, Load, I, "LC_LAZY_LOAD_DYLIB"))) | |||
1416 | return; | |||
1417 | Libraries.push_back(Load.Ptr); | |||
1418 | } else if (Load.C.cmd == MachO::LC_REEXPORT_DYLIB) { | |||
1419 | if ((Err = checkDylibCommand(*this, Load, I, "LC_REEXPORT_DYLIB"))) | |||
1420 | return; | |||
1421 | Libraries.push_back(Load.Ptr); | |||
1422 | } else if (Load.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) { | |||
1423 | if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_UPWARD_DYLIB"))) | |||
1424 | return; | |||
1425 | Libraries.push_back(Load.Ptr); | |||
1426 | } else if (Load.C.cmd == MachO::LC_ID_DYLINKER) { | |||
1427 | if ((Err = checkDyldCommand(*this, Load, I, "LC_ID_DYLINKER"))) | |||
1428 | return; | |||
1429 | } else if (Load.C.cmd == MachO::LC_LOAD_DYLINKER) { | |||
1430 | if ((Err = checkDyldCommand(*this, Load, I, "LC_LOAD_DYLINKER"))) | |||
1431 | return; | |||
1432 | } else if (Load.C.cmd == MachO::LC_DYLD_ENVIRONMENT) { | |||
1433 | if ((Err = checkDyldCommand(*this, Load, I, "LC_DYLD_ENVIRONMENT"))) | |||
1434 | return; | |||
1435 | } else if (Load.C.cmd == MachO::LC_VERSION_MIN_MACOSX) { | |||
1436 | if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd, | |||
1437 | "LC_VERSION_MIN_MACOSX"))) | |||
1438 | return; | |||
1439 | } else if (Load.C.cmd == MachO::LC_VERSION_MIN_IPHONEOS) { | |||
1440 | if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd, | |||
1441 | "LC_VERSION_MIN_IPHONEOS"))) | |||
1442 | return; | |||
1443 | } else if (Load.C.cmd == MachO::LC_VERSION_MIN_TVOS) { | |||
1444 | if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd, | |||
1445 | "LC_VERSION_MIN_TVOS"))) | |||
1446 | return; | |||
1447 | } else if (Load.C.cmd == MachO::LC_VERSION_MIN_WATCHOS) { | |||
1448 | if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd, | |||
1449 | "LC_VERSION_MIN_WATCHOS"))) | |||
1450 | return; | |||
1451 | } else if (Load.C.cmd == MachO::LC_NOTE) { | |||
1452 | if ((Err = checkNoteCommand(*this, Load, I, Elements))) | |||
1453 | return; | |||
1454 | } else if (Load.C.cmd == MachO::LC_BUILD_VERSION) { | |||
1455 | if ((Err = parseBuildVersionCommand(*this, Load, BuildTools, I))) | |||
1456 | return; | |||
1457 | } else if (Load.C.cmd == MachO::LC_RPATH) { | |||
1458 | if ((Err = checkRpathCommand(*this, Load, I))) | |||
1459 | return; | |||
1460 | } else if (Load.C.cmd == MachO::LC_SOURCE_VERSION) { | |||
1461 | if (Load.C.cmdsize != sizeof(MachO::source_version_command)) { | |||
1462 | Err = malformedError("LC_SOURCE_VERSION command " + Twine(I) + | |||
1463 | " has incorrect cmdsize"); | |||
1464 | return; | |||
1465 | } | |||
1466 | if (SourceLoadCmd) { | |||
1467 | Err = malformedError("more than one LC_SOURCE_VERSION command"); | |||
1468 | return; | |||
1469 | } | |||
1470 | SourceLoadCmd = Load.Ptr; | |||
1471 | } else if (Load.C.cmd == MachO::LC_MAIN) { | |||
1472 | if (Load.C.cmdsize != sizeof(MachO::entry_point_command)) { | |||
1473 | Err = malformedError("LC_MAIN command " + Twine(I) + | |||
1474 | " has incorrect cmdsize"); | |||
1475 | return; | |||
1476 | } | |||
1477 | if (EntryPointLoadCmd) { | |||
1478 | Err = malformedError("more than one LC_MAIN command"); | |||
1479 | return; | |||
1480 | } | |||
1481 | EntryPointLoadCmd = Load.Ptr; | |||
1482 | } else if (Load.C.cmd == MachO::LC_ENCRYPTION_INFO) { | |||
1483 | if (Load.C.cmdsize != sizeof(MachO::encryption_info_command)) { | |||
1484 | Err = malformedError("LC_ENCRYPTION_INFO command " + Twine(I) + | |||
1485 | " has incorrect cmdsize"); | |||
1486 | return; | |||
1487 | } | |||
1488 | MachO::encryption_info_command E = | |||
1489 | getStruct<MachO::encryption_info_command>(*this, Load.Ptr); | |||
1490 | if ((Err = checkEncryptCommand(*this, Load, I, E.cryptoff, E.cryptsize, | |||
1491 | &EncryptLoadCmd, "LC_ENCRYPTION_INFO"))) | |||
1492 | return; | |||
1493 | } else if (Load.C.cmd == MachO::LC_ENCRYPTION_INFO_64) { | |||
1494 | if (Load.C.cmdsize != sizeof(MachO::encryption_info_command_64)) { | |||
1495 | Err = malformedError("LC_ENCRYPTION_INFO_64 command " + Twine(I) + | |||
1496 | " has incorrect cmdsize"); | |||
1497 | return; | |||
1498 | } | |||
1499 | MachO::encryption_info_command_64 E = | |||
1500 | getStruct<MachO::encryption_info_command_64>(*this, Load.Ptr); | |||
1501 | if ((Err = checkEncryptCommand(*this, Load, I, E.cryptoff, E.cryptsize, | |||
1502 | &EncryptLoadCmd, "LC_ENCRYPTION_INFO_64"))) | |||
1503 | return; | |||
1504 | } else if (Load.C.cmd == MachO::LC_LINKER_OPTION) { | |||
1505 | if ((Err = checkLinkerOptCommand(*this, Load, I))) | |||
1506 | return; | |||
1507 | } else if (Load.C.cmd == MachO::LC_SUB_FRAMEWORK) { | |||
1508 | if (Load.C.cmdsize < sizeof(MachO::sub_framework_command)) { | |||
1509 | Err = malformedError("load command " + Twine(I) + | |||
1510 | " LC_SUB_FRAMEWORK cmdsize too small"); | |||
1511 | return; | |||
1512 | } | |||
1513 | MachO::sub_framework_command S = | |||
1514 | getStruct<MachO::sub_framework_command>(*this, Load.Ptr); | |||
1515 | if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_FRAMEWORK", | |||
1516 | sizeof(MachO::sub_framework_command), | |||
1517 | "sub_framework_command", S.umbrella, | |||
1518 | "umbrella"))) | |||
1519 | return; | |||
1520 | } else if (Load.C.cmd == MachO::LC_SUB_UMBRELLA) { | |||
1521 | if (Load.C.cmdsize < sizeof(MachO::sub_umbrella_command)) { | |||
1522 | Err = malformedError("load command " + Twine(I) + | |||
1523 | " LC_SUB_UMBRELLA cmdsize too small"); | |||
1524 | return; | |||
1525 | } | |||
1526 | MachO::sub_umbrella_command S = | |||
1527 | getStruct<MachO::sub_umbrella_command>(*this, Load.Ptr); | |||
1528 | if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_UMBRELLA", | |||
1529 | sizeof(MachO::sub_umbrella_command), | |||
1530 | "sub_umbrella_command", S.sub_umbrella, | |||
1531 | "sub_umbrella"))) | |||
1532 | return; | |||
1533 | } else if (Load.C.cmd == MachO::LC_SUB_LIBRARY) { | |||
1534 | if (Load.C.cmdsize < sizeof(MachO::sub_library_command)) { | |||
1535 | Err = malformedError("load command " + Twine(I) + | |||
1536 | " LC_SUB_LIBRARY cmdsize too small"); | |||
1537 | return; | |||
1538 | } | |||
1539 | MachO::sub_library_command S = | |||
1540 | getStruct<MachO::sub_library_command>(*this, Load.Ptr); | |||
1541 | if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_LIBRARY", | |||
1542 | sizeof(MachO::sub_library_command), | |||
1543 | "sub_library_command", S.sub_library, | |||
1544 | "sub_library"))) | |||
1545 | return; | |||
1546 | } else if (Load.C.cmd == MachO::LC_SUB_CLIENT) { | |||
1547 | if (Load.C.cmdsize < sizeof(MachO::sub_client_command)) { | |||
1548 | Err = malformedError("load command " + Twine(I) + | |||
1549 | " LC_SUB_CLIENT cmdsize too small"); | |||
1550 | return; | |||
1551 | } | |||
1552 | MachO::sub_client_command S = | |||
1553 | getStruct<MachO::sub_client_command>(*this, Load.Ptr); | |||
1554 | if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_CLIENT", | |||
1555 | sizeof(MachO::sub_client_command), | |||
1556 | "sub_client_command", S.client, "client"))) | |||
1557 | return; | |||
1558 | } else if (Load.C.cmd == MachO::LC_ROUTINES) { | |||
1559 | if (Load.C.cmdsize != sizeof(MachO::routines_command)) { | |||
1560 | Err = malformedError("LC_ROUTINES command " + Twine(I) + | |||
1561 | " has incorrect cmdsize"); | |||
1562 | return; | |||
1563 | } | |||
1564 | if (RoutinesLoadCmd) { | |||
1565 | Err = malformedError("more than one LC_ROUTINES and or LC_ROUTINES_64 " | |||
1566 | "command"); | |||
1567 | return; | |||
1568 | } | |||
1569 | RoutinesLoadCmd = Load.Ptr; | |||
1570 | } else if (Load.C.cmd == MachO::LC_ROUTINES_64) { | |||
1571 | if (Load.C.cmdsize != sizeof(MachO::routines_command_64)) { | |||
1572 | Err = malformedError("LC_ROUTINES_64 command " + Twine(I) + | |||
1573 | " has incorrect cmdsize"); | |||
1574 | return; | |||
1575 | } | |||
1576 | if (RoutinesLoadCmd) { | |||
1577 | Err = malformedError("more than one LC_ROUTINES_64 and or LC_ROUTINES " | |||
1578 | "command"); | |||
1579 | return; | |||
1580 | } | |||
1581 | RoutinesLoadCmd = Load.Ptr; | |||
1582 | } else if (Load.C.cmd == MachO::LC_UNIXTHREAD) { | |||
1583 | if ((Err = checkThreadCommand(*this, Load, I, "LC_UNIXTHREAD"))) | |||
1584 | return; | |||
1585 | if (UnixThreadLoadCmd) { | |||
1586 | Err = malformedError("more than one LC_UNIXTHREAD command"); | |||
1587 | return; | |||
1588 | } | |||
1589 | UnixThreadLoadCmd = Load.Ptr; | |||
1590 | } else if (Load.C.cmd == MachO::LC_THREAD) { | |||
1591 | if ((Err = checkThreadCommand(*this, Load, I, "LC_THREAD"))) | |||
1592 | return; | |||
1593 | // Note: LC_TWOLEVEL_HINTS is really obsolete and is not supported. | |||
1594 | } else if (Load.C.cmd == MachO::LC_TWOLEVEL_HINTS) { | |||
1595 | if ((Err = checkTwoLevelHintsCommand(*this, Load, I, | |||
1596 | &TwoLevelHintsLoadCmd, Elements))) | |||
1597 | return; | |||
1598 | } else if (Load.C.cmd == MachO::LC_IDENT) { | |||
1599 | // Note: LC_IDENT is ignored. | |||
1600 | continue; | |||
1601 | } else if (isLoadCommandObsolete(Load.C.cmd)) { | |||
1602 | Err = malformedError("load command " + Twine(I) + " for cmd value of: " + | |||
1603 | Twine(Load.C.cmd) + " is obsolete and not " | |||
1604 | "supported"); | |||
1605 | return; | |||
1606 | } | |||
1607 | // TODO: generate a error for unknown load commands by default. But still | |||
1608 | // need work out an approach to allow or not allow unknown values like this | |||
1609 | // as an option for some uses like lldb. | |||
1610 | if (I < LoadCommandCount - 1) { | |||
1611 | if (auto LoadOrErr = getNextLoadCommandInfo(*this, I, Load)) | |||
1612 | Load = *LoadOrErr; | |||
1613 | else { | |||
1614 | Err = LoadOrErr.takeError(); | |||
1615 | return; | |||
1616 | } | |||
1617 | } | |||
1618 | } | |||
1619 | if (!SymtabLoadCmd) { | |||
1620 | if (DysymtabLoadCmd) { | |||
1621 | Err = malformedError("contains LC_DYSYMTAB load command without a " | |||
1622 | "LC_SYMTAB load command"); | |||
1623 | return; | |||
1624 | } | |||
1625 | } else if (DysymtabLoadCmd) { | |||
1626 | MachO::symtab_command Symtab = | |||
1627 | getStruct<MachO::symtab_command>(*this, SymtabLoadCmd); | |||
1628 | MachO::dysymtab_command Dysymtab = | |||
1629 | getStruct<MachO::dysymtab_command>(*this, DysymtabLoadCmd); | |||
1630 | if (Dysymtab.nlocalsym != 0 && Dysymtab.ilocalsym > Symtab.nsyms) { | |||
1631 | Err = malformedError("ilocalsym in LC_DYSYMTAB load command " | |||
1632 | "extends past the end of the symbol table"); | |||
1633 | return; | |||
1634 | } | |||
1635 | uint64_t BigSize = Dysymtab.ilocalsym; | |||
1636 | BigSize += Dysymtab.nlocalsym; | |||
1637 | if (Dysymtab.nlocalsym != 0 && BigSize > Symtab.nsyms) { | |||
1638 | Err = malformedError("ilocalsym plus nlocalsym in LC_DYSYMTAB load " | |||
1639 | "command extends past the end of the symbol table"); | |||
1640 | return; | |||
1641 | } | |||
1642 | if (Dysymtab.nextdefsym != 0 && Dysymtab.iextdefsym > Symtab.nsyms) { | |||
1643 | Err = malformedError("iextdefsym in LC_DYSYMTAB load command " | |||
1644 | "extends past the end of the symbol table"); | |||
1645 | return; | |||
1646 | } | |||
1647 | BigSize = Dysymtab.iextdefsym; | |||
1648 | BigSize += Dysymtab.nextdefsym; | |||
1649 | if (Dysymtab.nextdefsym != 0 && BigSize > Symtab.nsyms) { | |||
1650 | Err = malformedError("iextdefsym plus nextdefsym in LC_DYSYMTAB " | |||
1651 | "load command extends past the end of the symbol " | |||
1652 | "table"); | |||
1653 | return; | |||
1654 | } | |||
1655 | if (Dysymtab.nundefsym != 0 && Dysymtab.iundefsym > Symtab.nsyms) { | |||
1656 | Err = malformedError("iundefsym in LC_DYSYMTAB load command " | |||
1657 | "extends past the end of the symbol table"); | |||
1658 | return; | |||
1659 | } | |||
1660 | BigSize = Dysymtab.iundefsym; | |||
1661 | BigSize += Dysymtab.nundefsym; | |||
1662 | if (Dysymtab.nundefsym != 0 && BigSize > Symtab.nsyms) { | |||
1663 | Err = malformedError("iundefsym plus nundefsym in LC_DYSYMTAB load " | |||
1664 | " command extends past the end of the symbol table"); | |||
1665 | return; | |||
1666 | } | |||
1667 | } | |||
1668 | if ((getHeader().filetype == MachO::MH_DYLIB || | |||
1669 | getHeader().filetype == MachO::MH_DYLIB_STUB) && | |||
1670 | DyldIdLoadCmd == nullptr) { | |||
1671 | Err = malformedError("no LC_ID_DYLIB load command in dynamic library " | |||
1672 | "filetype"); | |||
1673 | return; | |||
1674 | } | |||
1675 | assert(LoadCommands.size() == LoadCommandCount)((void)0); | |||
1676 | ||||
1677 | Err = Error::success(); | |||
1678 | } | |||
1679 | ||||
1680 | Error MachOObjectFile::checkSymbolTable() const { | |||
1681 | uint32_t Flags = 0; | |||
1682 | if (is64Bit()) { | |||
1683 | MachO::mach_header_64 H_64 = MachOObjectFile::getHeader64(); | |||
1684 | Flags = H_64.flags; | |||
1685 | } else { | |||
1686 | MachO::mach_header H = MachOObjectFile::getHeader(); | |||
1687 | Flags = H.flags; | |||
1688 | } | |||
1689 | uint8_t NType = 0; | |||
1690 | uint8_t NSect = 0; | |||
1691 | uint16_t NDesc = 0; | |||
1692 | uint32_t NStrx = 0; | |||
1693 | uint64_t NValue = 0; | |||
1694 | uint32_t SymbolIndex = 0; | |||
1695 | MachO::symtab_command S = getSymtabLoadCommand(); | |||
1696 | for (const SymbolRef &Symbol : symbols()) { | |||
1697 | DataRefImpl SymDRI = Symbol.getRawDataRefImpl(); | |||
1698 | if (is64Bit()) { | |||
1699 | MachO::nlist_64 STE_64 = getSymbol64TableEntry(SymDRI); | |||
1700 | NType = STE_64.n_type; | |||
1701 | NSect = STE_64.n_sect; | |||
1702 | NDesc = STE_64.n_desc; | |||
1703 | NStrx = STE_64.n_strx; | |||
1704 | NValue = STE_64.n_value; | |||
1705 | } else { | |||
1706 | MachO::nlist STE = getSymbolTableEntry(SymDRI); | |||
1707 | NType = STE.n_type; | |||
1708 | NSect = STE.n_sect; | |||
1709 | NDesc = STE.n_desc; | |||
1710 | NStrx = STE.n_strx; | |||
1711 | NValue = STE.n_value; | |||
1712 | } | |||
1713 | if ((NType & MachO::N_STAB) == 0) { | |||
1714 | if ((NType & MachO::N_TYPE) == MachO::N_SECT) { | |||
1715 | if (NSect == 0 || NSect > Sections.size()) | |||
1716 | return malformedError("bad section index: " + Twine((int)NSect) + | |||
1717 | " for symbol at index " + Twine(SymbolIndex)); | |||
1718 | } | |||
1719 | if ((NType & MachO::N_TYPE) == MachO::N_INDR) { | |||
1720 | if (NValue >= S.strsize) | |||
1721 | return malformedError("bad n_value: " + Twine((int)NValue) + " past " | |||
1722 | "the end of string table, for N_INDR symbol at " | |||
1723 | "index " + Twine(SymbolIndex)); | |||
1724 | } | |||
1725 | if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL && | |||
1726 | (((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) || | |||
1727 | (NType & MachO::N_TYPE) == MachO::N_PBUD)) { | |||
1728 | uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc); | |||
1729 | if (LibraryOrdinal != 0 && | |||
1730 | LibraryOrdinal != MachO::EXECUTABLE_ORDINAL && | |||
1731 | LibraryOrdinal != MachO::DYNAMIC_LOOKUP_ORDINAL && | |||
1732 | LibraryOrdinal - 1 >= Libraries.size() ) { | |||
1733 | return malformedError("bad library ordinal: " + Twine(LibraryOrdinal) + | |||
1734 | " for symbol at index " + Twine(SymbolIndex)); | |||
1735 | } | |||
1736 | } | |||
1737 | } | |||
1738 | if (NStrx >= S.strsize) | |||
1739 | return malformedError("bad string table index: " + Twine((int)NStrx) + | |||
1740 | " past the end of string table, for symbol at " | |||
1741 | "index " + Twine(SymbolIndex)); | |||
1742 | SymbolIndex++; | |||
1743 | } | |||
1744 | return Error::success(); | |||
1745 | } | |||
1746 | ||||
1747 | void MachOObjectFile::moveSymbolNext(DataRefImpl &Symb) const { | |||
1748 | unsigned SymbolTableEntrySize = is64Bit() ? | |||
1749 | sizeof(MachO::nlist_64) : | |||
1750 | sizeof(MachO::nlist); | |||
1751 | Symb.p += SymbolTableEntrySize; | |||
1752 | } | |||
1753 | ||||
1754 | Expected<StringRef> MachOObjectFile::getSymbolName(DataRefImpl Symb) const { | |||
1755 | StringRef StringTable = getStringTableData(); | |||
1756 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb); | |||
1757 | if (Entry.n_strx == 0) | |||
1758 | // A n_strx value of 0 indicates that no name is associated with a | |||
1759 | // particular symbol table entry. | |||
1760 | return StringRef(); | |||
1761 | const char *Start = &StringTable.data()[Entry.n_strx]; | |||
1762 | if (Start < getData().begin() || Start >= getData().end()) { | |||
1763 | return malformedError("bad string index: " + Twine(Entry.n_strx) + | |||
1764 | " for symbol at index " + Twine(getSymbolIndex(Symb))); | |||
1765 | } | |||
1766 | return StringRef(Start); | |||
1767 | } | |||
1768 | ||||
1769 | unsigned MachOObjectFile::getSectionType(SectionRef Sec) const { | |||
1770 | DataRefImpl DRI = Sec.getRawDataRefImpl(); | |||
1771 | uint32_t Flags = getSectionFlags(*this, DRI); | |||
1772 | return Flags & MachO::SECTION_TYPE; | |||
1773 | } | |||
1774 | ||||
1775 | uint64_t MachOObjectFile::getNValue(DataRefImpl Sym) const { | |||
1776 | if (is64Bit()) { | |||
1777 | MachO::nlist_64 Entry = getSymbol64TableEntry(Sym); | |||
1778 | return Entry.n_value; | |||
1779 | } | |||
1780 | MachO::nlist Entry = getSymbolTableEntry(Sym); | |||
1781 | return Entry.n_value; | |||
1782 | } | |||
1783 | ||||
1784 | // getIndirectName() returns the name of the alias'ed symbol who's string table | |||
1785 | // index is in the n_value field. | |||
1786 | std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb, | |||
1787 | StringRef &Res) const { | |||
1788 | StringRef StringTable = getStringTableData(); | |||
1789 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb); | |||
1790 | if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR) | |||
1791 | return object_error::parse_failed; | |||
1792 | uint64_t NValue = getNValue(Symb); | |||
1793 | if (NValue >= StringTable.size()) | |||
1794 | return object_error::parse_failed; | |||
1795 | const char *Start = &StringTable.data()[NValue]; | |||
1796 | Res = StringRef(Start); | |||
1797 | return std::error_code(); | |||
1798 | } | |||
1799 | ||||
1800 | uint64_t MachOObjectFile::getSymbolValueImpl(DataRefImpl Sym) const { | |||
1801 | return getNValue(Sym); | |||
1802 | } | |||
1803 | ||||
1804 | Expected<uint64_t> MachOObjectFile::getSymbolAddress(DataRefImpl Sym) const { | |||
1805 | return getSymbolValue(Sym); | |||
1806 | } | |||
1807 | ||||
1808 | uint32_t MachOObjectFile::getSymbolAlignment(DataRefImpl DRI) const { | |||
1809 | uint32_t Flags = cantFail(getSymbolFlags(DRI)); | |||
1810 | if (Flags & SymbolRef::SF_Common) { | |||
1811 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, DRI); | |||
1812 | return 1 << MachO::GET_COMM_ALIGN(Entry.n_desc); | |||
1813 | } | |||
1814 | return 0; | |||
1815 | } | |||
1816 | ||||
1817 | uint64_t MachOObjectFile::getCommonSymbolSizeImpl(DataRefImpl DRI) const { | |||
1818 | return getNValue(DRI); | |||
1819 | } | |||
1820 | ||||
1821 | Expected<SymbolRef::Type> | |||
1822 | MachOObjectFile::getSymbolType(DataRefImpl Symb) const { | |||
1823 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb); | |||
1824 | uint8_t n_type = Entry.n_type; | |||
1825 | ||||
1826 | // If this is a STAB debugging symbol, we can do nothing more. | |||
1827 | if (n_type & MachO::N_STAB) | |||
1828 | return SymbolRef::ST_Debug; | |||
1829 | ||||
1830 | switch (n_type & MachO::N_TYPE) { | |||
1831 | case MachO::N_UNDF : | |||
1832 | return SymbolRef::ST_Unknown; | |||
1833 | case MachO::N_SECT : | |||
1834 | Expected<section_iterator> SecOrError = getSymbolSection(Symb); | |||
1835 | if (!SecOrError) | |||
1836 | return SecOrError.takeError(); | |||
1837 | section_iterator Sec = *SecOrError; | |||
1838 | if (Sec == section_end()) | |||
1839 | return SymbolRef::ST_Other; | |||
1840 | if (Sec->isData() || Sec->isBSS()) | |||
1841 | return SymbolRef::ST_Data; | |||
1842 | return SymbolRef::ST_Function; | |||
1843 | } | |||
1844 | return SymbolRef::ST_Other; | |||
1845 | } | |||
1846 | ||||
1847 | Expected<uint32_t> MachOObjectFile::getSymbolFlags(DataRefImpl DRI) const { | |||
1848 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, DRI); | |||
1849 | ||||
1850 | uint8_t MachOType = Entry.n_type; | |||
1851 | uint16_t MachOFlags = Entry.n_desc; | |||
1852 | ||||
1853 | uint32_t Result = SymbolRef::SF_None; | |||
1854 | ||||
1855 | if ((MachOType & MachO::N_TYPE) == MachO::N_INDR) | |||
1856 | Result |= SymbolRef::SF_Indirect; | |||
1857 | ||||
1858 | if (MachOType & MachO::N_STAB) | |||
1859 | Result |= SymbolRef::SF_FormatSpecific; | |||
1860 | ||||
1861 | if (MachOType & MachO::N_EXT) { | |||
1862 | Result |= SymbolRef::SF_Global; | |||
1863 | if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF) { | |||
1864 | if (getNValue(DRI)) | |||
1865 | Result |= SymbolRef::SF_Common; | |||
1866 | else | |||
1867 | Result |= SymbolRef::SF_Undefined; | |||
1868 | } | |||
1869 | ||||
1870 | if (!(MachOType & MachO::N_PEXT)) | |||
1871 | Result |= SymbolRef::SF_Exported; | |||
1872 | } | |||
1873 | ||||
1874 | if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF)) | |||
1875 | Result |= SymbolRef::SF_Weak; | |||
1876 | ||||
1877 | if (MachOFlags & (MachO::N_ARM_THUMB_DEF)) | |||
1878 | Result |= SymbolRef::SF_Thumb; | |||
1879 | ||||
1880 | if ((MachOType & MachO::N_TYPE) == MachO::N_ABS) | |||
1881 | Result |= SymbolRef::SF_Absolute; | |||
1882 | ||||
1883 | return Result; | |||
1884 | } | |||
1885 | ||||
1886 | Expected<section_iterator> | |||
1887 | MachOObjectFile::getSymbolSection(DataRefImpl Symb) const { | |||
1888 | MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb); | |||
1889 | uint8_t index = Entry.n_sect; | |||
1890 | ||||
1891 | if (index == 0) | |||
1892 | return section_end(); | |||
1893 | DataRefImpl DRI; | |||
1894 | DRI.d.a = index - 1; | |||
1895 | if (DRI.d.a >= Sections.size()){ | |||
1896 | return malformedError("bad section index: " + Twine((int)index) + | |||
1897 | " for symbol at index " + Twine(getSymbolIndex(Symb))); | |||
1898 | } | |||
1899 | return section_iterator(SectionRef(DRI, this)); | |||
1900 | } | |||
1901 | ||||
1902 | unsigned MachOObjectFile::getSymbolSectionID(SymbolRef Sym) const { | |||
1903 | MachO::nlist_base Entry = | |||
1904 | getSymbolTableEntryBase(*this, Sym.getRawDataRefImpl()); | |||
1905 | return Entry.n_sect - 1; | |||
1906 | } | |||
1907 | ||||
1908 | void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const { | |||
1909 | Sec.d.a++; | |||
1910 | } | |||
1911 | ||||
1912 | Expected<StringRef> MachOObjectFile::getSectionName(DataRefImpl Sec) const { | |||
1913 | ArrayRef<char> Raw = getSectionRawName(Sec); | |||
1914 | return parseSegmentOrSectionName(Raw.data()); | |||
1915 | } | |||
1916 | ||||
1917 | uint64_t MachOObjectFile::getSectionAddress(DataRefImpl Sec) const { | |||
1918 | if (is64Bit()) | |||
1919 | return getSection64(Sec).addr; | |||
1920 | return getSection(Sec).addr; | |||
1921 | } | |||
1922 | ||||
1923 | uint64_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const { | |||
1924 | return Sec.d.a; | |||
1925 | } | |||
1926 | ||||
1927 | uint64_t MachOObjectFile::getSectionSize(DataRefImpl Sec) const { | |||
1928 | // In the case if a malformed Mach-O file where the section offset is past | |||
1929 | // the end of the file or some part of the section size is past the end of | |||
1930 | // the file return a size of zero or a size that covers the rest of the file | |||
1931 | // but does not extend past the end of the file. | |||
1932 | uint32_t SectOffset, SectType; | |||
1933 | uint64_t SectSize; | |||
1934 | ||||
1935 | if (is64Bit()) { | |||
1936 | MachO::section_64 Sect = getSection64(Sec); | |||
1937 | SectOffset = Sect.offset; | |||
1938 | SectSize = Sect.size; | |||
1939 | SectType = Sect.flags & MachO::SECTION_TYPE; | |||
1940 | } else { | |||
1941 | MachO::section Sect = getSection(Sec); | |||
1942 | SectOffset = Sect.offset; | |||
1943 | SectSize = Sect.size; | |||
1944 | SectType = Sect.flags & MachO::SECTION_TYPE; | |||
1945 | } | |||
1946 | if (SectType == MachO::S_ZEROFILL || SectType == MachO::S_GB_ZEROFILL) | |||
1947 | return SectSize; | |||
1948 | uint64_t FileSize = getData().size(); | |||
1949 | if (SectOffset > FileSize) | |||
1950 | return 0; | |||
1951 | if (FileSize - SectOffset < SectSize) | |||
1952 | return FileSize - SectOffset; | |||
1953 | return SectSize; | |||
1954 | } | |||
1955 | ||||
1956 | ArrayRef<uint8_t> MachOObjectFile::getSectionContents(uint32_t Offset, | |||
1957 | uint64_t Size) const { | |||
1958 | return arrayRefFromStringRef(getData().substr(Offset, Size)); | |||
1959 | } | |||
1960 | ||||
1961 | Expected<ArrayRef<uint8_t>> | |||
1962 | MachOObjectFile::getSectionContents(DataRefImpl Sec) const { | |||
1963 | uint32_t Offset; | |||
1964 | uint64_t Size; | |||
1965 | ||||
1966 | if (is64Bit()) { | |||
1967 | MachO::section_64 Sect = getSection64(Sec); | |||
1968 | Offset = Sect.offset; | |||
1969 | Size = Sect.size; | |||
1970 | } else { | |||
1971 | MachO::section Sect = getSection(Sec); | |||
1972 | Offset = Sect.offset; | |||
1973 | Size = Sect.size; | |||
1974 | } | |||
1975 | ||||
1976 | return getSectionContents(Offset, Size); | |||
1977 | } | |||
1978 | ||||
1979 | uint64_t MachOObjectFile::getSectionAlignment(DataRefImpl Sec) const { | |||
1980 | uint32_t Align; | |||
1981 | if (is64Bit()) { | |||
1982 | MachO::section_64 Sect = getSection64(Sec); | |||
1983 | Align = Sect.align; | |||
1984 | } else { | |||
1985 | MachO::section Sect = getSection(Sec); | |||
1986 | Align = Sect.align; | |||
1987 | } | |||
1988 | ||||
1989 | return uint64_t(1) << Align; | |||
1990 | } | |||
1991 | ||||
1992 | Expected<SectionRef> MachOObjectFile::getSection(unsigned SectionIndex) const { | |||
1993 | if (SectionIndex < 1 || SectionIndex > Sections.size()) | |||
1994 | return malformedError("bad section index: " + Twine((int)SectionIndex)); | |||
1995 | ||||
1996 | DataRefImpl DRI; | |||
1997 | DRI.d.a = SectionIndex - 1; | |||
1998 | return SectionRef(DRI, this); | |||
1999 | } | |||
2000 | ||||
2001 | Expected<SectionRef> MachOObjectFile::getSection(StringRef SectionName) const { | |||
2002 | for (const SectionRef &Section : sections()) { | |||
2003 | auto NameOrErr = Section.getName(); | |||
2004 | if (!NameOrErr) | |||
2005 | return NameOrErr.takeError(); | |||
2006 | if (*NameOrErr == SectionName) | |||
2007 | return Section; | |||
2008 | } | |||
2009 | return errorCodeToError(object_error::parse_failed); | |||
2010 | } | |||
2011 | ||||
2012 | bool MachOObjectFile::isSectionCompressed(DataRefImpl Sec) const { | |||
2013 | return false; | |||
2014 | } | |||
2015 | ||||
2016 | bool MachOObjectFile::isSectionText(DataRefImpl Sec) const { | |||
2017 | uint32_t Flags = getSectionFlags(*this, Sec); | |||
2018 | return Flags & MachO::S_ATTR_PURE_INSTRUCTIONS; | |||
2019 | } | |||
2020 | ||||
2021 | bool MachOObjectFile::isSectionData(DataRefImpl Sec) const { | |||
2022 | uint32_t Flags = getSectionFlags(*this, Sec); | |||
2023 | unsigned SectionType = Flags & MachO::SECTION_TYPE; | |||
2024 | return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) && | |||
2025 | !(SectionType == MachO::S_ZEROFILL || | |||
2026 | SectionType == MachO::S_GB_ZEROFILL); | |||
2027 | } | |||
2028 | ||||
2029 | bool MachOObjectFile::isSectionBSS(DataRefImpl Sec) const { | |||
2030 | uint32_t Flags = getSectionFlags(*this, Sec); | |||
2031 | unsigned SectionType = Flags & MachO::SECTION_TYPE; | |||
2032 | return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) && | |||
2033 | (SectionType == MachO::S_ZEROFILL || | |||
2034 | SectionType == MachO::S_GB_ZEROFILL); | |||
2035 | } | |||
2036 | ||||
2037 | bool MachOObjectFile::isDebugSection(DataRefImpl Sec) const { | |||
2038 | Expected<StringRef> SectionNameOrErr = getSectionName(Sec); | |||
2039 | if (!SectionNameOrErr) { | |||
2040 | // TODO: Report the error message properly. | |||
2041 | consumeError(SectionNameOrErr.takeError()); | |||
2042 | return false; | |||
2043 | } | |||
2044 | StringRef SectionName = SectionNameOrErr.get(); | |||
2045 | return SectionName.startswith("__debug") || | |||
2046 | SectionName.startswith("__zdebug") || | |||
2047 | SectionName.startswith("__apple") || SectionName == "__gdb_index" || | |||
2048 | SectionName == "__swift_ast"; | |||
2049 | } | |||
2050 | ||||
2051 | unsigned MachOObjectFile::getSectionID(SectionRef Sec) const { | |||
2052 | return Sec.getRawDataRefImpl().d.a; | |||
2053 | } | |||
2054 | ||||
2055 | bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) const { | |||
2056 | uint32_t Flags = getSectionFlags(*this, Sec); | |||
2057 | unsigned SectionType = Flags & MachO::SECTION_TYPE; | |||
2058 | return SectionType == MachO::S_ZEROFILL || | |||
2059 | SectionType == MachO::S_GB_ZEROFILL; | |||
2060 | } | |||
2061 | ||||
2062 | bool MachOObjectFile::isSectionBitcode(DataRefImpl Sec) const { | |||
2063 | StringRef SegmentName = getSectionFinalSegmentName(Sec); | |||
2064 | if (Expected<StringRef> NameOrErr = getSectionName(Sec)) | |||
2065 | return (SegmentName == "__LLVM" && *NameOrErr == "__bitcode"); | |||
2066 | return false; | |||
2067 | } | |||
2068 | ||||
2069 | bool MachOObjectFile::isSectionStripped(DataRefImpl Sec) const { | |||
2070 | if (is64Bit()) | |||
2071 | return getSection64(Sec).offset == 0; | |||
2072 | return getSection(Sec).offset == 0; | |||
2073 | } | |||
2074 | ||||
2075 | relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const { | |||
2076 | DataRefImpl Ret; | |||
2077 | Ret.d.a = Sec.d.a; | |||
2078 | Ret.d.b = 0; | |||
2079 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2080 | } | |||
2081 | ||||
2082 | relocation_iterator | |||
2083 | MachOObjectFile::section_rel_end(DataRefImpl Sec) const { | |||
2084 | uint32_t Num; | |||
2085 | if (is64Bit()) { | |||
2086 | MachO::section_64 Sect = getSection64(Sec); | |||
2087 | Num = Sect.nreloc; | |||
2088 | } else { | |||
2089 | MachO::section Sect = getSection(Sec); | |||
2090 | Num = Sect.nreloc; | |||
2091 | } | |||
2092 | ||||
2093 | DataRefImpl Ret; | |||
2094 | Ret.d.a = Sec.d.a; | |||
2095 | Ret.d.b = Num; | |||
2096 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2097 | } | |||
2098 | ||||
2099 | relocation_iterator MachOObjectFile::extrel_begin() const { | |||
2100 | DataRefImpl Ret; | |||
2101 | // for DYSYMTAB symbols, Ret.d.a == 0 for external relocations | |||
2102 | Ret.d.a = 0; // Would normally be a section index. | |||
2103 | Ret.d.b = 0; // Index into the external relocations | |||
2104 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2105 | } | |||
2106 | ||||
2107 | relocation_iterator MachOObjectFile::extrel_end() const { | |||
2108 | MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand(); | |||
2109 | DataRefImpl Ret; | |||
2110 | // for DYSYMTAB symbols, Ret.d.a == 0 for external relocations | |||
2111 | Ret.d.a = 0; // Would normally be a section index. | |||
2112 | Ret.d.b = DysymtabLoadCmd.nextrel; // Index into the external relocations | |||
2113 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2114 | } | |||
2115 | ||||
2116 | relocation_iterator MachOObjectFile::locrel_begin() const { | |||
2117 | DataRefImpl Ret; | |||
2118 | // for DYSYMTAB symbols, Ret.d.a == 1 for local relocations | |||
2119 | Ret.d.a = 1; // Would normally be a section index. | |||
2120 | Ret.d.b = 0; // Index into the local relocations | |||
2121 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2122 | } | |||
2123 | ||||
2124 | relocation_iterator MachOObjectFile::locrel_end() const { | |||
2125 | MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand(); | |||
2126 | DataRefImpl Ret; | |||
2127 | // for DYSYMTAB symbols, Ret.d.a == 1 for local relocations | |||
2128 | Ret.d.a = 1; // Would normally be a section index. | |||
2129 | Ret.d.b = DysymtabLoadCmd.nlocrel; // Index into the local relocations | |||
2130 | return relocation_iterator(RelocationRef(Ret, this)); | |||
2131 | } | |||
2132 | ||||
2133 | void MachOObjectFile::moveRelocationNext(DataRefImpl &Rel) const { | |||
2134 | ++Rel.d.b; | |||
2135 | } | |||
2136 | ||||
2137 | uint64_t MachOObjectFile::getRelocationOffset(DataRefImpl Rel) const { | |||
2138 | assert((getHeader().filetype == MachO::MH_OBJECT ||((void)0) | |||
2139 | getHeader().filetype == MachO::MH_KEXT_BUNDLE) &&((void)0) | |||
2140 | "Only implemented for MH_OBJECT && MH_KEXT_BUNDLE")((void)0); | |||
2141 | MachO::any_relocation_info RE = getRelocation(Rel); | |||
2142 | return getAnyRelocationAddress(RE); | |||
2143 | } | |||
2144 | ||||
2145 | symbol_iterator | |||
2146 | MachOObjectFile::getRelocationSymbol(DataRefImpl Rel) const { | |||
2147 | MachO::any_relocation_info RE = getRelocation(Rel); | |||
2148 | if (isRelocationScattered(RE)) | |||
2149 | return symbol_end(); | |||
2150 | ||||
2151 | uint32_t SymbolIdx = getPlainRelocationSymbolNum(RE); | |||
2152 | bool isExtern = getPlainRelocationExternal(RE); | |||
2153 | if (!isExtern) | |||
2154 | return symbol_end(); | |||
2155 | ||||
2156 | MachO::symtab_command S = getSymtabLoadCommand(); | |||
2157 | unsigned SymbolTableEntrySize = is64Bit() ? | |||
2158 | sizeof(MachO::nlist_64) : | |||
2159 | sizeof(MachO::nlist); | |||
2160 | uint64_t Offset = S.symoff + SymbolIdx * SymbolTableEntrySize; | |||
2161 | DataRefImpl Sym; | |||
2162 | Sym.p = reinterpret_cast<uintptr_t>(getPtr(*this, Offset)); | |||
2163 | return symbol_iterator(SymbolRef(Sym, this)); | |||
2164 | } | |||
2165 | ||||
2166 | section_iterator | |||
2167 | MachOObjectFile::getRelocationSection(DataRefImpl Rel) const { | |||
2168 | return section_iterator(getAnyRelocationSection(getRelocation(Rel))); | |||
2169 | } | |||
2170 | ||||
2171 | uint64_t MachOObjectFile::getRelocationType(DataRefImpl Rel) const { | |||
2172 | MachO::any_relocation_info RE = getRelocation(Rel); | |||
2173 | return getAnyRelocationType(RE); | |||
2174 | } | |||
2175 | ||||
2176 | void MachOObjectFile::getRelocationTypeName( | |||
2177 | DataRefImpl Rel, SmallVectorImpl<char> &Result) const { | |||
2178 | StringRef res; | |||
2179 | uint64_t RType = getRelocationType(Rel); | |||
2180 | ||||
2181 | unsigned Arch = this->getArch(); | |||
2182 | ||||
2183 | switch (Arch) { | |||
2184 | case Triple::x86: { | |||
2185 | static const char *const Table[] = { | |||
2186 | "GENERIC_RELOC_VANILLA", | |||
2187 | "GENERIC_RELOC_PAIR", | |||
2188 | "GENERIC_RELOC_SECTDIFF", | |||
2189 | "GENERIC_RELOC_PB_LA_PTR", | |||
2190 | "GENERIC_RELOC_LOCAL_SECTDIFF", | |||
2191 | "GENERIC_RELOC_TLV" }; | |||
2192 | ||||
2193 | if (RType > 5) | |||
2194 | res = "Unknown"; | |||
2195 | else | |||
2196 | res = Table[RType]; | |||
2197 | break; | |||
2198 | } | |||
2199 | case Triple::x86_64: { | |||
2200 | static const char *const Table[] = { | |||
2201 | "X86_64_RELOC_UNSIGNED", | |||
2202 | "X86_64_RELOC_SIGNED", | |||
2203 | "X86_64_RELOC_BRANCH", | |||
2204 | "X86_64_RELOC_GOT_LOAD", | |||
2205 | "X86_64_RELOC_GOT", | |||
2206 | "X86_64_RELOC_SUBTRACTOR", | |||
2207 | "X86_64_RELOC_SIGNED_1", | |||
2208 | "X86_64_RELOC_SIGNED_2", | |||
2209 | "X86_64_RELOC_SIGNED_4", | |||
2210 | "X86_64_RELOC_TLV" }; | |||
2211 | ||||
2212 | if (RType > 9) | |||
2213 | res = "Unknown"; | |||
2214 | else | |||
2215 | res = Table[RType]; | |||
2216 | break; | |||
2217 | } | |||
2218 | case Triple::arm: { | |||
2219 | static const char *const Table[] = { | |||
2220 | "ARM_RELOC_VANILLA", | |||
2221 | "ARM_RELOC_PAIR", | |||
2222 | "ARM_RELOC_SECTDIFF", | |||
2223 | "ARM_RELOC_LOCAL_SECTDIFF", | |||
2224 | "ARM_RELOC_PB_LA_PTR", | |||
2225 | "ARM_RELOC_BR24", | |||
2226 | "ARM_THUMB_RELOC_BR22", | |||
2227 | "ARM_THUMB_32BIT_BRANCH", | |||
2228 | "ARM_RELOC_HALF", | |||
2229 | "ARM_RELOC_HALF_SECTDIFF" }; | |||
2230 | ||||
2231 | if (RType > 9) | |||
2232 | res = "Unknown"; | |||
2233 | else | |||
2234 | res = Table[RType]; | |||
2235 | break; | |||
2236 | } | |||
2237 | case Triple::aarch64: | |||
2238 | case Triple::aarch64_32: { | |||
2239 | static const char *const Table[] = { | |||
2240 | "ARM64_RELOC_UNSIGNED", "ARM64_RELOC_SUBTRACTOR", | |||
2241 | "ARM64_RELOC_BRANCH26", "ARM64_RELOC_PAGE21", | |||
2242 | "ARM64_RELOC_PAGEOFF12", "ARM64_RELOC_GOT_LOAD_PAGE21", | |||
2243 | "ARM64_RELOC_GOT_LOAD_PAGEOFF12", "ARM64_RELOC_POINTER_TO_GOT", | |||
2244 | "ARM64_RELOC_TLVP_LOAD_PAGE21", "ARM64_RELOC_TLVP_LOAD_PAGEOFF12", | |||
2245 | "ARM64_RELOC_ADDEND" | |||
2246 | }; | |||
2247 | ||||
2248 | if (RType >= array_lengthof(Table)) | |||
2249 | res = "Unknown"; | |||
2250 | else | |||
2251 | res = Table[RType]; | |||
2252 | break; | |||
2253 | } | |||
2254 | case Triple::ppc: { | |||
2255 | static const char *const Table[] = { | |||
2256 | "PPC_RELOC_VANILLA", | |||
2257 | "PPC_RELOC_PAIR", | |||
2258 | "PPC_RELOC_BR14", | |||
2259 | "PPC_RELOC_BR24", | |||
2260 | "PPC_RELOC_HI16", | |||
2261 | "PPC_RELOC_LO16", | |||
2262 | "PPC_RELOC_HA16", | |||
2263 | "PPC_RELOC_LO14", | |||
2264 | "PPC_RELOC_SECTDIFF", | |||
2265 | "PPC_RELOC_PB_LA_PTR", | |||
2266 | "PPC_RELOC_HI16_SECTDIFF", | |||
2267 | "PPC_RELOC_LO16_SECTDIFF", | |||
2268 | "PPC_RELOC_HA16_SECTDIFF", | |||
2269 | "PPC_RELOC_JBSR", | |||
2270 | "PPC_RELOC_LO14_SECTDIFF", | |||
2271 | "PPC_RELOC_LOCAL_SECTDIFF" }; | |||
2272 | ||||
2273 | if (RType > 15) | |||
2274 | res = "Unknown"; | |||
2275 | else | |||
2276 | res = Table[RType]; | |||
2277 | break; | |||
2278 | } | |||
2279 | case Triple::UnknownArch: | |||
2280 | res = "Unknown"; | |||
2281 | break; | |||
2282 | } | |||
2283 | Result.append(res.begin(), res.end()); | |||
2284 | } | |||
2285 | ||||
2286 | uint8_t MachOObjectFile::getRelocationLength(DataRefImpl Rel) const { | |||
2287 | MachO::any_relocation_info RE = getRelocation(Rel); | |||
2288 | return getAnyRelocationLength(RE); | |||
2289 | } | |||
2290 | ||||
2291 | // | |||
2292 | // guessLibraryShortName() is passed a name of a dynamic library and returns a | |||
2293 | // guess on what the short name is. Then name is returned as a substring of the | |||
2294 | // StringRef Name passed in. The name of the dynamic library is recognized as | |||
2295 | // a framework if it has one of the two following forms: | |||
2296 | // Foo.framework/Versions/A/Foo | |||
2297 | // Foo.framework/Foo | |||
2298 | // Where A and Foo can be any string. And may contain a trailing suffix | |||
2299 | // starting with an underbar. If the Name is recognized as a framework then | |||
2300 | // isFramework is set to true else it is set to false. If the Name has a | |||
2301 | // suffix then Suffix is set to the substring in Name that contains the suffix | |||
2302 | // else it is set to a NULL StringRef. | |||
2303 | // | |||
2304 | // The Name of the dynamic library is recognized as a library name if it has | |||
2305 | // one of the two following forms: | |||
2306 | // libFoo.A.dylib | |||
2307 | // libFoo.dylib | |||
2308 | // | |||
2309 | // The library may have a suffix trailing the name Foo of the form: | |||
2310 | // libFoo_profile.A.dylib | |||
2311 | // libFoo_profile.dylib | |||
2312 | // These dyld image suffixes are separated from the short name by a '_' | |||
2313 | // character. Because the '_' character is commonly used to separate words in | |||
2314 | // filenames guessLibraryShortName() cannot reliably separate a dylib's short | |||
2315 | // name from an arbitrary image suffix; imagine if both the short name and the | |||
2316 | // suffix contains an '_' character! To better deal with this ambiguity, | |||
2317 | // guessLibraryShortName() will recognize only "_debug" and "_profile" as valid | |||
2318 | // Suffix values. Calling code needs to be tolerant of guessLibraryShortName() | |||
2319 | // guessing incorrectly. | |||
2320 | // | |||
2321 | // The Name of the dynamic library is also recognized as a library name if it | |||
2322 | // has the following form: | |||
2323 | // Foo.qtx | |||
2324 | // | |||
2325 | // If the Name of the dynamic library is none of the forms above then a NULL | |||
2326 | // StringRef is returned. | |||
2327 | StringRef MachOObjectFile::guessLibraryShortName(StringRef Name, | |||
2328 | bool &isFramework, | |||
2329 | StringRef &Suffix) { | |||
2330 | StringRef Foo, F, DotFramework, V, Dylib, Lib, Dot, Qtx; | |||
2331 | size_t a, b, c, d, Idx; | |||
2332 | ||||
2333 | isFramework = false; | |||
2334 | Suffix = StringRef(); | |||
2335 | ||||
2336 | // Pull off the last component and make Foo point to it | |||
2337 | a = Name.rfind('/'); | |||
2338 | if (a == Name.npos || a == 0) | |||
2339 | goto guess_library; | |||
2340 | Foo = Name.slice(a+1, Name.npos); | |||
2341 | ||||
2342 | // Look for a suffix starting with a '_' | |||
2343 | Idx = Foo.rfind('_'); | |||
2344 | if (Idx != Foo.npos && Foo.size() >= 2) { | |||
2345 | Suffix = Foo.slice(Idx, Foo.npos); | |||
2346 | if (Suffix != "_debug" && Suffix != "_profile") | |||
2347 | Suffix = StringRef(); | |||
2348 | else | |||
2349 | Foo = Foo.slice(0, Idx); | |||
2350 | } | |||
2351 | ||||
2352 | // First look for the form Foo.framework/Foo | |||
2353 | b = Name.rfind('/', a); | |||
2354 | if (b == Name.npos) | |||
2355 | Idx = 0; | |||
2356 | else | |||
2357 | Idx = b+1; | |||
2358 | F = Name.slice(Idx, Idx + Foo.size()); | |||
2359 | DotFramework = Name.slice(Idx + Foo.size(), | |||
2360 | Idx + Foo.size() + sizeof(".framework/")-1); | |||
2361 | if (F == Foo && DotFramework == ".framework/") { | |||
2362 | isFramework = true; | |||
2363 | return Foo; | |||
2364 | } | |||
2365 | ||||
2366 | // Next look for the form Foo.framework/Versions/A/Foo | |||
2367 | if (b == Name.npos) | |||
2368 | goto guess_library; | |||
2369 | c = Name.rfind('/', b); | |||
2370 | if (c == Name.npos || c == 0) | |||
2371 | goto guess_library; | |||
2372 | V = Name.slice(c+1, Name.npos); | |||
2373 | if (!V.startswith("Versions/")) | |||
2374 | goto guess_library; | |||
2375 | d = Name.rfind('/', c); | |||
2376 | if (d == Name.npos) | |||
2377 | Idx = 0; | |||
2378 | else | |||
2379 | Idx = d+1; | |||
2380 | F = Name.slice(Idx, Idx + Foo.size()); | |||
2381 | DotFramework = Name.slice(Idx + Foo.size(), | |||
2382 | Idx + Foo.size() + sizeof(".framework/")-1); | |||
2383 | if (F == Foo && DotFramework == ".framework/") { | |||
2384 | isFramework = true; | |||
2385 | return Foo; | |||
2386 | } | |||
2387 | ||||
2388 | guess_library: | |||
2389 | // pull off the suffix after the "." and make a point to it | |||
2390 | a = Name.rfind('.'); | |||
2391 | if (a == Name.npos || a == 0) | |||
2392 | return StringRef(); | |||
2393 | Dylib = Name.slice(a, Name.npos); | |||
2394 | if (Dylib != ".dylib") | |||
2395 | goto guess_qtx; | |||
2396 | ||||
2397 | // First pull off the version letter for the form Foo.A.dylib if any. | |||
2398 | if (a >= 3) { | |||
2399 | Dot = Name.slice(a-2, a-1); | |||
2400 | if (Dot == ".") | |||
2401 | a = a - 2; | |||
2402 | } | |||
2403 | ||||
2404 | b = Name.rfind('/', a); | |||
2405 | if (b == Name.npos) | |||
2406 | b = 0; | |||
2407 | else | |||
2408 | b = b+1; | |||
2409 | // ignore any suffix after an underbar like Foo_profile.A.dylib | |||
2410 | Idx = Name.rfind('_'); | |||
2411 | if (Idx != Name.npos && Idx != b) { | |||
2412 | Lib = Name.slice(b, Idx); | |||
2413 | Suffix = Name.slice(Idx, a); | |||
2414 | if (Suffix != "_debug" && Suffix != "_profile") { | |||
2415 | Suffix = StringRef(); | |||
2416 | Lib = Name.slice(b, a); | |||
2417 | } | |||
2418 | } | |||
2419 | else | |||
2420 | Lib = Name.slice(b, a); | |||
2421 | // There are incorrect library names of the form: | |||
2422 | // libATS.A_profile.dylib so check for these. | |||
2423 | if (Lib.size() >= 3) { | |||
2424 | Dot = Lib.slice(Lib.size()-2, Lib.size()-1); | |||
2425 | if (Dot == ".") | |||
2426 | Lib = Lib.slice(0, Lib.size()-2); | |||
2427 | } | |||
2428 | return Lib; | |||
2429 | ||||
2430 | guess_qtx: | |||
2431 | Qtx = Name.slice(a, Name.npos); | |||
2432 | if (Qtx != ".qtx") | |||
2433 | return StringRef(); | |||
2434 | b = Name.rfind('/', a); | |||
2435 | if (b == Name.npos) | |||
2436 | Lib = Name.slice(0, a); | |||
2437 | else | |||
2438 | Lib = Name.slice(b+1, a); | |||
2439 | // There are library names of the form: QT.A.qtx so check for these. | |||
2440 | if (Lib.size() >= 3) { | |||
2441 | Dot = Lib.slice(Lib.size()-2, Lib.size()-1); | |||
2442 | if (Dot == ".") | |||
2443 | Lib = Lib.slice(0, Lib.size()-2); | |||
2444 | } | |||
2445 | return Lib; | |||
2446 | } | |||
2447 | ||||
2448 | // getLibraryShortNameByIndex() is used to get the short name of the library | |||
2449 | // for an undefined symbol in a linked Mach-O binary that was linked with the | |||
2450 | // normal two-level namespace default (that is MH_TWOLEVEL in the header). | |||
2451 | // It is passed the index (0 - based) of the library as translated from | |||
2452 | // GET_LIBRARY_ORDINAL (1 - based). | |||
2453 | std::error_code MachOObjectFile::getLibraryShortNameByIndex(unsigned Index, | |||
2454 | StringRef &Res) const { | |||
2455 | if (Index >= Libraries.size()) | |||
2456 | return object_error::parse_failed; | |||
2457 | ||||
2458 | // If the cache of LibrariesShortNames is not built up do that first for | |||
2459 | // all the Libraries. | |||
2460 | if (LibrariesShortNames.size() == 0) { | |||
2461 | for (unsigned i = 0; i < Libraries.size(); i++) { | |||
2462 | auto CommandOrErr = | |||
2463 | getStructOrErr<MachO::dylib_command>(*this, Libraries[i]); | |||
2464 | if (!CommandOrErr) | |||
2465 | return object_error::parse_failed; | |||
2466 | MachO::dylib_command D = CommandOrErr.get(); | |||
2467 | if (D.dylib.name >= D.cmdsize) | |||
2468 | return object_error::parse_failed; | |||
2469 | const char *P = (const char *)(Libraries[i]) + D.dylib.name; | |||
2470 | StringRef Name = StringRef(P); | |||
2471 | if (D.dylib.name+Name.size() >= D.cmdsize) | |||
2472 | return object_error::parse_failed; | |||
2473 | StringRef Suffix; | |||
2474 | bool isFramework; | |||
2475 | StringRef shortName = guessLibraryShortName(Name, isFramework, Suffix); | |||
2476 | if (shortName.empty()) | |||
2477 | LibrariesShortNames.push_back(Name); | |||
2478 | else | |||
2479 | LibrariesShortNames.push_back(shortName); | |||
2480 | } | |||
2481 | } | |||
2482 | ||||
2483 | Res = LibrariesShortNames[Index]; | |||
2484 | return std::error_code(); | |||
2485 | } | |||
2486 | ||||
2487 | uint32_t MachOObjectFile::getLibraryCount() const { | |||
2488 | return Libraries.size(); | |||
2489 | } | |||
2490 | ||||
2491 | section_iterator | |||
2492 | MachOObjectFile::getRelocationRelocatedSection(relocation_iterator Rel) const { | |||
2493 | DataRefImpl Sec; | |||
2494 | Sec.d.a = Rel->getRawDataRefImpl().d.a; | |||
2495 | return section_iterator(SectionRef(Sec, this)); | |||
2496 | } | |||
2497 | ||||
2498 | basic_symbol_iterator MachOObjectFile::symbol_begin() const { | |||
2499 | DataRefImpl DRI; | |||
2500 | MachO::symtab_command Symtab = getSymtabLoadCommand(); | |||
2501 | if (!SymtabLoadCmd || Symtab.nsyms == 0) | |||
2502 | return basic_symbol_iterator(SymbolRef(DRI, this)); | |||
2503 | ||||
2504 | return getSymbolByIndex(0); | |||
2505 | } | |||
2506 | ||||
2507 | basic_symbol_iterator MachOObjectFile::symbol_end() const { | |||
2508 | DataRefImpl DRI; | |||
2509 | MachO::symtab_command Symtab = getSymtabLoadCommand(); | |||
2510 | if (!SymtabLoadCmd || Symtab.nsyms == 0) | |||
2511 | return basic_symbol_iterator(SymbolRef(DRI, this)); | |||
2512 | ||||
2513 | unsigned SymbolTableEntrySize = is64Bit() ? | |||
2514 | sizeof(MachO::nlist_64) : | |||
2515 | sizeof(MachO::nlist); | |||
2516 | unsigned Offset = Symtab.symoff + | |||
2517 | Symtab.nsyms * SymbolTableEntrySize; | |||
2518 | DRI.p = reinterpret_cast<uintptr_t>(getPtr(*this, Offset)); | |||
2519 | return basic_symbol_iterator(SymbolRef(DRI, this)); | |||
2520 | } | |||
2521 | ||||
2522 | symbol_iterator MachOObjectFile::getSymbolByIndex(unsigned Index) const { | |||
2523 | MachO::symtab_command Symtab = getSymtabLoadCommand(); | |||
2524 | if (!SymtabLoadCmd || Index >= Symtab.nsyms) | |||
2525 | report_fatal_error("Requested symbol index is out of range."); | |||
2526 | unsigned SymbolTableEntrySize = | |||
2527 | is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist); | |||
2528 | DataRefImpl DRI; | |||
2529 | DRI.p = reinterpret_cast<uintptr_t>(getPtr(*this, Symtab.symoff)); | |||
2530 | DRI.p += Index * SymbolTableEntrySize; | |||
2531 | return basic_symbol_iterator(SymbolRef(DRI, this)); | |||
2532 | } | |||
2533 | ||||
2534 | uint64_t MachOObjectFile::getSymbolIndex(DataRefImpl Symb) const { | |||
2535 | MachO::symtab_command Symtab = getSymtabLoadCommand(); | |||
2536 | if (!SymtabLoadCmd) | |||
2537 | report_fatal_error("getSymbolIndex() called with no symbol table symbol"); | |||
2538 | unsigned SymbolTableEntrySize = | |||
2539 | is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist); | |||
2540 | DataRefImpl DRIstart; | |||
2541 | DRIstart.p = reinterpret_cast<uintptr_t>(getPtr(*this, Symtab.symoff)); | |||
2542 | uint64_t Index = (Symb.p - DRIstart.p) / SymbolTableEntrySize; | |||
2543 | return Index; | |||
2544 | } | |||
2545 | ||||
2546 | section_iterator MachOObjectFile::section_begin() const { | |||
2547 | DataRefImpl DRI; | |||
2548 | return section_iterator(SectionRef(DRI, this)); | |||
2549 | } | |||
2550 | ||||
2551 | section_iterator MachOObjectFile::section_end() const { | |||
2552 | DataRefImpl DRI; | |||
2553 | DRI.d.a = Sections.size(); | |||
2554 | return section_iterator(SectionRef(DRI, this)); | |||
2555 | } | |||
2556 | ||||
2557 | uint8_t MachOObjectFile::getBytesInAddress() const { | |||
2558 | return is64Bit() ? 8 : 4; | |||
2559 | } | |||
2560 | ||||
2561 | StringRef MachOObjectFile::getFileFormatName() const { | |||
2562 | unsigned CPUType = getCPUType(*this); | |||
2563 | if (!is64Bit()) { | |||
2564 | switch (CPUType) { | |||
2565 | case MachO::CPU_TYPE_I386: | |||
2566 | return "Mach-O 32-bit i386"; | |||
2567 | case MachO::CPU_TYPE_ARM: | |||
2568 | return "Mach-O arm"; | |||
2569 | case MachO::CPU_TYPE_ARM64_32: | |||
2570 | return "Mach-O arm64 (ILP32)"; | |||
2571 | case MachO::CPU_TYPE_POWERPC: | |||
2572 | return "Mach-O 32-bit ppc"; | |||
2573 | default: | |||
2574 | return "Mach-O 32-bit unknown"; | |||
2575 | } | |||
2576 | } | |||
2577 | ||||
2578 | switch (CPUType) { | |||
2579 | case MachO::CPU_TYPE_X86_64: | |||
2580 | return "Mach-O 64-bit x86-64"; | |||
2581 | case MachO::CPU_TYPE_ARM64: | |||
2582 | return "Mach-O arm64"; | |||
2583 | case MachO::CPU_TYPE_POWERPC64: | |||
2584 | return "Mach-O 64-bit ppc64"; | |||
2585 | default: | |||
2586 | return "Mach-O 64-bit unknown"; | |||
2587 | } | |||
2588 | } | |||
2589 | ||||
2590 | Triple::ArchType MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType) { | |||
2591 | switch (CPUType) { | |||
2592 | case MachO::CPU_TYPE_I386: | |||
2593 | return Triple::x86; | |||
2594 | case MachO::CPU_TYPE_X86_64: | |||
2595 | return Triple::x86_64; | |||
2596 | case MachO::CPU_TYPE_ARM: | |||
2597 | return Triple::arm; | |||
2598 | case MachO::CPU_TYPE_ARM64: | |||
2599 | return Triple::aarch64; | |||
2600 | case MachO::CPU_TYPE_ARM64_32: | |||
2601 | return Triple::aarch64_32; | |||
2602 | case MachO::CPU_TYPE_POWERPC: | |||
2603 | return Triple::ppc; | |||
2604 | case MachO::CPU_TYPE_POWERPC64: | |||
2605 | return Triple::ppc64; | |||
2606 | default: | |||
2607 | return Triple::UnknownArch; | |||
2608 | } | |||
2609 | } | |||
2610 | ||||
2611 | Triple MachOObjectFile::getArchTriple(uint32_t CPUType, uint32_t CPUSubType, | |||
2612 | const char **McpuDefault, | |||
2613 | const char **ArchFlag) { | |||
2614 | if (McpuDefault) | |||
2615 | *McpuDefault = nullptr; | |||
2616 | if (ArchFlag) | |||
2617 | *ArchFlag = nullptr; | |||
2618 | ||||
2619 | switch (CPUType) { | |||
2620 | case MachO::CPU_TYPE_I386: | |||
2621 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2622 | case MachO::CPU_SUBTYPE_I386_ALL: | |||
2623 | if (ArchFlag) | |||
2624 | *ArchFlag = "i386"; | |||
2625 | return Triple("i386-apple-darwin"); | |||
2626 | default: | |||
2627 | return Triple(); | |||
2628 | } | |||
2629 | case MachO::CPU_TYPE_X86_64: | |||
2630 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2631 | case MachO::CPU_SUBTYPE_X86_64_ALL: | |||
2632 | if (ArchFlag) | |||
2633 | *ArchFlag = "x86_64"; | |||
2634 | return Triple("x86_64-apple-darwin"); | |||
2635 | case MachO::CPU_SUBTYPE_X86_64_H: | |||
2636 | if (ArchFlag) | |||
2637 | *ArchFlag = "x86_64h"; | |||
2638 | return Triple("x86_64h-apple-darwin"); | |||
2639 | default: | |||
2640 | return Triple(); | |||
2641 | } | |||
2642 | case MachO::CPU_TYPE_ARM: | |||
2643 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2644 | case MachO::CPU_SUBTYPE_ARM_V4T: | |||
2645 | if (ArchFlag) | |||
2646 | *ArchFlag = "armv4t"; | |||
2647 | return Triple("armv4t-apple-darwin"); | |||
2648 | case MachO::CPU_SUBTYPE_ARM_V5TEJ: | |||
2649 | if (ArchFlag) | |||
2650 | *ArchFlag = "armv5e"; | |||
2651 | return Triple("armv5e-apple-darwin"); | |||
2652 | case MachO::CPU_SUBTYPE_ARM_XSCALE: | |||
2653 | if (ArchFlag) | |||
2654 | *ArchFlag = "xscale"; | |||
2655 | return Triple("xscale-apple-darwin"); | |||
2656 | case MachO::CPU_SUBTYPE_ARM_V6: | |||
2657 | if (ArchFlag) | |||
2658 | *ArchFlag = "armv6"; | |||
2659 | return Triple("armv6-apple-darwin"); | |||
2660 | case MachO::CPU_SUBTYPE_ARM_V6M: | |||
2661 | if (McpuDefault) | |||
2662 | *McpuDefault = "cortex-m0"; | |||
2663 | if (ArchFlag) | |||
2664 | *ArchFlag = "armv6m"; | |||
2665 | return Triple("armv6m-apple-darwin"); | |||
2666 | case MachO::CPU_SUBTYPE_ARM_V7: | |||
2667 | if (ArchFlag) | |||
2668 | *ArchFlag = "armv7"; | |||
2669 | return Triple("armv7-apple-darwin"); | |||
2670 | case MachO::CPU_SUBTYPE_ARM_V7EM: | |||
2671 | if (McpuDefault) | |||
2672 | *McpuDefault = "cortex-m4"; | |||
2673 | if (ArchFlag) | |||
2674 | *ArchFlag = "armv7em"; | |||
2675 | return Triple("thumbv7em-apple-darwin"); | |||
2676 | case MachO::CPU_SUBTYPE_ARM_V7K: | |||
2677 | if (McpuDefault) | |||
2678 | *McpuDefault = "cortex-a7"; | |||
2679 | if (ArchFlag) | |||
2680 | *ArchFlag = "armv7k"; | |||
2681 | return Triple("armv7k-apple-darwin"); | |||
2682 | case MachO::CPU_SUBTYPE_ARM_V7M: | |||
2683 | if (McpuDefault) | |||
2684 | *McpuDefault = "cortex-m3"; | |||
2685 | if (ArchFlag) | |||
2686 | *ArchFlag = "armv7m"; | |||
2687 | return Triple("thumbv7m-apple-darwin"); | |||
2688 | case MachO::CPU_SUBTYPE_ARM_V7S: | |||
2689 | if (McpuDefault) | |||
2690 | *McpuDefault = "cortex-a7"; | |||
2691 | if (ArchFlag) | |||
2692 | *ArchFlag = "armv7s"; | |||
2693 | return Triple("armv7s-apple-darwin"); | |||
2694 | default: | |||
2695 | return Triple(); | |||
2696 | } | |||
2697 | case MachO::CPU_TYPE_ARM64: | |||
2698 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2699 | case MachO::CPU_SUBTYPE_ARM64_ALL: | |||
2700 | if (McpuDefault) | |||
2701 | *McpuDefault = "cyclone"; | |||
2702 | if (ArchFlag) | |||
2703 | *ArchFlag = "arm64"; | |||
2704 | return Triple("arm64-apple-darwin"); | |||
2705 | case MachO::CPU_SUBTYPE_ARM64E: | |||
2706 | if (McpuDefault) | |||
2707 | *McpuDefault = "apple-a12"; | |||
2708 | if (ArchFlag) | |||
2709 | *ArchFlag = "arm64e"; | |||
2710 | return Triple("arm64e-apple-darwin"); | |||
2711 | default: | |||
2712 | return Triple(); | |||
2713 | } | |||
2714 | case MachO::CPU_TYPE_ARM64_32: | |||
2715 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2716 | case MachO::CPU_SUBTYPE_ARM64_32_V8: | |||
2717 | if (McpuDefault) | |||
2718 | *McpuDefault = "cyclone"; | |||
2719 | if (ArchFlag) | |||
2720 | *ArchFlag = "arm64_32"; | |||
2721 | return Triple("arm64_32-apple-darwin"); | |||
2722 | default: | |||
2723 | return Triple(); | |||
2724 | } | |||
2725 | case MachO::CPU_TYPE_POWERPC: | |||
2726 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2727 | case MachO::CPU_SUBTYPE_POWERPC_ALL: | |||
2728 | if (ArchFlag) | |||
2729 | *ArchFlag = "ppc"; | |||
2730 | return Triple("ppc-apple-darwin"); | |||
2731 | default: | |||
2732 | return Triple(); | |||
2733 | } | |||
2734 | case MachO::CPU_TYPE_POWERPC64: | |||
2735 | switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) { | |||
2736 | case MachO::CPU_SUBTYPE_POWERPC_ALL: | |||
2737 | if (ArchFlag) | |||
2738 | *ArchFlag = "ppc64"; | |||
2739 | return Triple("ppc64-apple-darwin"); | |||
2740 | default: | |||
2741 | return Triple(); | |||
2742 | } | |||
2743 | default: | |||
2744 | return Triple(); | |||
2745 | } | |||
2746 | } | |||
2747 | ||||
2748 | Triple MachOObjectFile::getHostArch() { | |||
2749 | return Triple(sys::getDefaultTargetTriple()); | |||
2750 | } | |||
2751 | ||||
2752 | bool MachOObjectFile::isValidArch(StringRef ArchFlag) { | |||
2753 | auto validArchs = getValidArchs(); | |||
2754 | return llvm::is_contained(validArchs, ArchFlag); | |||
2755 | } | |||
2756 | ||||
2757 | ArrayRef<StringRef> MachOObjectFile::getValidArchs() { | |||
2758 | static const std::array<StringRef, 18> ValidArchs = {{ | |||
2759 | "i386", | |||
2760 | "x86_64", | |||
2761 | "x86_64h", | |||
2762 | "armv4t", | |||
2763 | "arm", | |||
2764 | "armv5e", | |||
2765 | "armv6", | |||
2766 | "armv6m", | |||
2767 | "armv7", | |||
2768 | "armv7em", | |||
2769 | "armv7k", | |||
2770 | "armv7m", | |||
2771 | "armv7s", | |||
2772 | "arm64", | |||
2773 | "arm64e", | |||
2774 | "arm64_32", | |||
2775 | "ppc", | |||
2776 | "ppc64", | |||
2777 | }}; | |||
2778 | ||||
2779 | return ValidArchs; | |||
2780 | } | |||
2781 | ||||
2782 | Triple::ArchType MachOObjectFile::getArch() const { | |||
2783 | return getArch(getCPUType(*this), getCPUSubType(*this)); | |||
2784 | } | |||
2785 | ||||
2786 | Triple MachOObjectFile::getArchTriple(const char **McpuDefault) const { | |||
2787 | return getArchTriple(Header.cputype, Header.cpusubtype, McpuDefault); | |||
2788 | } | |||
2789 | ||||
2790 | relocation_iterator MachOObjectFile::section_rel_begin(unsigned Index) const { | |||
2791 | DataRefImpl DRI; | |||
2792 | DRI.d.a = Index; | |||
2793 | return section_rel_begin(DRI); | |||
2794 | } | |||
2795 | ||||
2796 | relocation_iterator MachOObjectFile::section_rel_end(unsigned Index) const { | |||
2797 | DataRefImpl DRI; | |||
2798 | DRI.d.a = Index; | |||
2799 | return section_rel_end(DRI); | |||
2800 | } | |||
2801 | ||||
2802 | dice_iterator MachOObjectFile::begin_dices() const { | |||
2803 | DataRefImpl DRI; | |||
2804 | if (!DataInCodeLoadCmd) | |||
2805 | return dice_iterator(DiceRef(DRI, this)); | |||
2806 | ||||
2807 | MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand(); | |||
2808 | DRI.p = reinterpret_cast<uintptr_t>(getPtr(*this, DicLC.dataoff)); | |||
2809 | return dice_iterator(DiceRef(DRI, this)); | |||
2810 | } | |||
2811 | ||||
2812 | dice_iterator MachOObjectFile::end_dices() const { | |||
2813 | DataRefImpl DRI; | |||
2814 | if (!DataInCodeLoadCmd) | |||
2815 | return dice_iterator(DiceRef(DRI, this)); | |||
2816 | ||||
2817 | MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand(); | |||
2818 | unsigned Offset = DicLC.dataoff + DicLC.datasize; | |||
2819 | DRI.p = reinterpret_cast<uintptr_t>(getPtr(*this, Offset)); | |||
2820 | return dice_iterator(DiceRef(DRI, this)); | |||
2821 | } | |||
2822 | ||||
2823 | ExportEntry::ExportEntry(Error *E, const MachOObjectFile *O, | |||
2824 | ArrayRef<uint8_t> T) : E(E), O(O), Trie(T) {} | |||
2825 | ||||
2826 | void ExportEntry::moveToFirst() { | |||
2827 | ErrorAsOutParameter ErrAsOutParam(E); | |||
2828 | pushNode(0); | |||
2829 | if (*E) | |||
2830 | return; | |||
2831 | pushDownUntilBottom(); | |||
2832 | } | |||
2833 | ||||
2834 | void ExportEntry::moveToEnd() { | |||
2835 | Stack.clear(); | |||
2836 | Done = true; | |||
2837 | } | |||
2838 | ||||
2839 | bool ExportEntry::operator==(const ExportEntry &Other) const { | |||
2840 | // Common case, one at end, other iterating from begin. | |||
2841 | if (Done || Other.Done) | |||
2842 | return (Done == Other.Done); | |||
2843 | // Not equal if different stack sizes. | |||
2844 | if (Stack.size() != Other.Stack.size()) | |||
2845 | return false; | |||
2846 | // Not equal if different cumulative strings. | |||
2847 | if (!CumulativeString.equals(Other.CumulativeString)) | |||
2848 | return false; | |||
2849 | // Equal if all nodes in both stacks match. | |||
2850 | for (unsigned i=0; i < Stack.size(); ++i) { | |||
2851 | if (Stack[i].Start != Other.Stack[i].Start) | |||
2852 | return false; | |||
2853 | } | |||
2854 | return true; | |||
2855 | } | |||
2856 | ||||
2857 | uint64_t ExportEntry::readULEB128(const uint8_t *&Ptr, const char **error) { | |||
2858 | unsigned Count; | |||
2859 | uint64_t Result = decodeULEB128(Ptr, &Count, Trie.end(), error); | |||
2860 | Ptr += Count; | |||
2861 | if (Ptr > Trie.end()) | |||
2862 | Ptr = Trie.end(); | |||
2863 | return Result; | |||
2864 | } | |||
2865 | ||||
2866 | StringRef ExportEntry::name() const { | |||
2867 | return CumulativeString; | |||
2868 | } | |||
2869 | ||||
2870 | uint64_t ExportEntry::flags() const { | |||
2871 | return Stack.back().Flags; | |||
2872 | } | |||
2873 | ||||
2874 | uint64_t ExportEntry::address() const { | |||
2875 | return Stack.back().Address; | |||
2876 | } | |||
2877 | ||||
2878 | uint64_t ExportEntry::other() const { | |||
2879 | return Stack.back().Other; | |||
2880 | } | |||
2881 | ||||
2882 | StringRef ExportEntry::otherName() const { | |||
2883 | const char* ImportName = Stack.back().ImportName; | |||
2884 | if (ImportName) | |||
2885 | return StringRef(ImportName); | |||
2886 | return StringRef(); | |||
2887 | } | |||
2888 | ||||
2889 | uint32_t ExportEntry::nodeOffset() const { | |||
2890 | return Stack.back().Start - Trie.begin(); | |||
2891 | } | |||
2892 | ||||
2893 | ExportEntry::NodeState::NodeState(const uint8_t *Ptr) | |||
2894 | : Start(Ptr), Current(Ptr) {} | |||
2895 | ||||
2896 | void ExportEntry::pushNode(uint64_t offset) { | |||
2897 | ErrorAsOutParameter ErrAsOutParam(E); | |||
2898 | const uint8_t *Ptr = Trie.begin() + offset; | |||
2899 | NodeState State(Ptr); | |||
2900 | const char *error; | |||
2901 | uint64_t ExportInfoSize = readULEB128(State.Current, &error); | |||
2902 | if (error) { | |||
2903 | *E = malformedError("export info size " + Twine(error) + | |||
2904 | " in export trie data at node: 0x" + | |||
2905 | Twine::utohexstr(offset)); | |||
2906 | moveToEnd(); | |||
2907 | return; | |||
2908 | } | |||
2909 | State.IsExportNode = (ExportInfoSize != 0); | |||
2910 | const uint8_t* Children = State.Current + ExportInfoSize; | |||
2911 | if (Children > Trie.end()) { | |||
2912 | *E = malformedError( | |||
2913 | "export info size: 0x" + Twine::utohexstr(ExportInfoSize) + | |||
2914 | " in export trie data at node: 0x" + Twine::utohexstr(offset) + | |||
2915 | " too big and extends past end of trie data"); | |||
2916 | moveToEnd(); | |||
2917 | return; | |||
2918 | } | |||
2919 | if (State.IsExportNode) { | |||
2920 | const uint8_t *ExportStart = State.Current; | |||
2921 | State.Flags = readULEB128(State.Current, &error); | |||
2922 | if (error) { | |||
2923 | *E = malformedError("flags " + Twine(error) + | |||
2924 | " in export trie data at node: 0x" + | |||
2925 | Twine::utohexstr(offset)); | |||
2926 | moveToEnd(); | |||
2927 | return; | |||
2928 | } | |||
2929 | uint64_t Kind = State.Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK; | |||
2930 | if (State.Flags != 0 && | |||
2931 | (Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_REGULAR && | |||
2932 | Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE && | |||
2933 | Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL)) { | |||
2934 | *E = malformedError( | |||
2935 | "unsupported exported symbol kind: " + Twine((int)Kind) + | |||
2936 | " in flags: 0x" + Twine::utohexstr(State.Flags) + | |||
2937 | " in export trie data at node: 0x" + Twine::utohexstr(offset)); | |||
2938 | moveToEnd(); | |||
2939 | return; | |||
2940 | } | |||
2941 | if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT) { | |||
2942 | State.Address = 0; | |||
2943 | State.Other = readULEB128(State.Current, &error); // dylib ordinal | |||
2944 | if (error) { | |||
2945 | *E = malformedError("dylib ordinal of re-export " + Twine(error) + | |||
2946 | " in export trie data at node: 0x" + | |||
2947 | Twine::utohexstr(offset)); | |||
2948 | moveToEnd(); | |||
2949 | return; | |||
2950 | } | |||
2951 | if (O != nullptr) { | |||
2952 | if (State.Other > O->getLibraryCount()) { | |||
2953 | *E = malformedError( | |||
2954 | "bad library ordinal: " + Twine((int)State.Other) + " (max " + | |||
2955 | Twine((int)O->getLibraryCount()) + | |||
2956 | ") in export trie data at node: 0x" + Twine::utohexstr(offset)); | |||
2957 | moveToEnd(); | |||
2958 | return; | |||
2959 | } | |||
2960 | } | |||
2961 | State.ImportName = reinterpret_cast<const char*>(State.Current); | |||
2962 | if (*State.ImportName == '\0') { | |||
2963 | State.Current++; | |||
2964 | } else { | |||
2965 | const uint8_t *End = State.Current + 1; | |||
2966 | if (End >= Trie.end()) { | |||
2967 | *E = malformedError("import name of re-export in export trie data at " | |||
2968 | "node: 0x" + | |||
2969 | Twine::utohexstr(offset) + | |||
2970 | " starts past end of trie data"); | |||
2971 | moveToEnd(); | |||
2972 | return; | |||
2973 | } | |||
2974 | while(*End != '\0' && End < Trie.end()) | |||
2975 | End++; | |||
2976 | if (*End != '\0') { | |||
2977 | *E = malformedError("import name of re-export in export trie data at " | |||
2978 | "node: 0x" + | |||
2979 | Twine::utohexstr(offset) + | |||
2980 | " extends past end of trie data"); | |||
2981 | moveToEnd(); | |||
2982 | return; | |||
2983 | } | |||
2984 | State.Current = End + 1; | |||
2985 | } | |||
2986 | } else { | |||
2987 | State.Address = readULEB128(State.Current, &error); | |||
2988 | if (error) { | |||
2989 | *E = malformedError("address " + Twine(error) + | |||
2990 | " in export trie data at node: 0x" + | |||
2991 | Twine::utohexstr(offset)); | |||
2992 | moveToEnd(); | |||
2993 | return; | |||
2994 | } | |||
2995 | if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER) { | |||
2996 | State.Other = readULEB128(State.Current, &error); | |||
2997 | if (error) { | |||
2998 | *E = malformedError("resolver of stub and resolver " + Twine(error) + | |||
2999 | " in export trie data at node: 0x" + | |||
3000 | Twine::utohexstr(offset)); | |||
3001 | moveToEnd(); | |||
3002 | return; | |||
3003 | } | |||
3004 | } | |||
3005 | } | |||
3006 | if(ExportStart + ExportInfoSize != State.Current) { | |||
3007 | *E = malformedError( | |||
3008 | "inconsistant export info size: 0x" + | |||
3009 | Twine::utohexstr(ExportInfoSize) + " where actual size was: 0x" + | |||
3010 | Twine::utohexstr(State.Current - ExportStart) + | |||
3011 | " in export trie data at node: 0x" + Twine::utohexstr(offset)); | |||
3012 | moveToEnd(); | |||
3013 | return; | |||
3014 | } | |||
3015 | } | |||
3016 | State.ChildCount = *Children; | |||
3017 | if (State.ChildCount != 0 && Children + 1 >= Trie.end()) { | |||
3018 | *E = malformedError("byte for count of childern in export trie data at " | |||
3019 | "node: 0x" + | |||
3020 | Twine::utohexstr(offset) + | |||
3021 | " extends past end of trie data"); | |||
3022 | moveToEnd(); | |||
3023 | return; | |||
3024 | } | |||
3025 | State.Current = Children + 1; | |||
3026 | State.NextChildIndex = 0; | |||
3027 | State.ParentStringLength = CumulativeString.size(); | |||
3028 | Stack.push_back(State); | |||
3029 | } | |||
3030 | ||||
3031 | void ExportEntry::pushDownUntilBottom() { | |||
3032 | ErrorAsOutParameter ErrAsOutParam(E); | |||
3033 | const char *error; | |||
3034 | while (Stack.back().NextChildIndex < Stack.back().ChildCount) { | |||
3035 | NodeState &Top = Stack.back(); | |||
3036 | CumulativeString.resize(Top.ParentStringLength); | |||
3037 | for (;*Top.Current != 0 && Top.Current < Trie.end(); Top.Current++) { | |||
3038 | char C = *Top.Current; | |||
3039 | CumulativeString.push_back(C); | |||
3040 | } | |||
3041 | if (Top.Current >= Trie.end()) { | |||
3042 | *E = malformedError("edge sub-string in export trie data at node: 0x" + | |||
3043 | Twine::utohexstr(Top.Start - Trie.begin()) + | |||
3044 | " for child #" + Twine((int)Top.NextChildIndex) + | |||
3045 | " extends past end of trie data"); | |||
3046 | moveToEnd(); | |||
3047 | return; | |||
3048 | } | |||
3049 | Top.Current += 1; | |||
3050 | uint64_t childNodeIndex = readULEB128(Top.Current, &error); | |||
3051 | if (error) { | |||
3052 | *E = malformedError("child node offset " + Twine(error) + | |||
3053 | " in export trie data at node: 0x" + | |||
3054 | Twine::utohexstr(Top.Start - Trie.begin())); | |||
3055 | moveToEnd(); | |||
3056 | return; | |||
3057 | } | |||
3058 | for (const NodeState &node : nodes()) { | |||
3059 | if (node.Start == Trie.begin() + childNodeIndex){ | |||
3060 | *E = malformedError("loop in childern in export trie data at node: 0x" + | |||
3061 | Twine::utohexstr(Top.Start - Trie.begin()) + | |||
3062 | " back to node: 0x" + | |||
3063 | Twine::utohexstr(childNodeIndex)); | |||
3064 | moveToEnd(); | |||
3065 | return; | |||
3066 | } | |||
3067 | } | |||
3068 | Top.NextChildIndex += 1; | |||
3069 | pushNode(childNodeIndex); | |||
3070 | if (*E) | |||
3071 | return; | |||
3072 | } | |||
3073 | if (!Stack.back().IsExportNode) { | |||
3074 | *E = malformedError("node is not an export node in export trie data at " | |||
3075 | "node: 0x" + | |||
3076 | Twine::utohexstr(Stack.back().Start - Trie.begin())); | |||
3077 | moveToEnd(); | |||
3078 | return; | |||
3079 | } | |||
3080 | } | |||
3081 | ||||
3082 | // We have a trie data structure and need a way to walk it that is compatible | |||
3083 | // with the C++ iterator model. The solution is a non-recursive depth first | |||
3084 | // traversal where the iterator contains a stack of parent nodes along with a | |||
3085 | // string that is the accumulation of all edge strings along the parent chain | |||
3086 | // to this point. | |||
3087 | // | |||
3088 | // There is one "export" node for each exported symbol. But because some | |||
3089 | // symbols may be a prefix of another symbol (e.g. _dup and _dup2), an export | |||
3090 | // node may have child nodes too. | |||
3091 | // | |||
3092 | // The algorithm for moveNext() is to keep moving down the leftmost unvisited | |||
3093 | // child until hitting a node with no children (which is an export node or | |||
3094 | // else the trie is malformed). On the way down, each node is pushed on the | |||
3095 | // stack ivar. If there is no more ways down, it pops up one and tries to go | |||
3096 | // down a sibling path until a childless node is reached. | |||
3097 | void ExportEntry::moveNext() { | |||
3098 | assert(!Stack.empty() && "ExportEntry::moveNext() with empty node stack")((void)0); | |||
3099 | if (!Stack.back().IsExportNode) { | |||
3100 | *E = malformedError("node is not an export node in export trie data at " | |||
3101 | "node: 0x" + | |||
3102 | Twine::utohexstr(Stack.back().Start - Trie.begin())); | |||
3103 | moveToEnd(); | |||
3104 | return; | |||
3105 | } | |||
3106 | ||||
3107 | Stack.pop_back(); | |||
3108 | while (!Stack.empty()) { | |||
3109 | NodeState &Top = Stack.back(); | |||
3110 | if (Top.NextChildIndex < Top.ChildCount) { | |||
3111 | pushDownUntilBottom(); | |||
3112 | // Now at the next export node. | |||
3113 | return; | |||
3114 | } else { | |||
3115 | if (Top.IsExportNode) { | |||
3116 | // This node has no children but is itself an export node. | |||
3117 | CumulativeString.resize(Top.ParentStringLength); | |||
3118 | return; | |||
3119 | } | |||
3120 | Stack.pop_back(); | |||
3121 | } | |||
3122 | } | |||
3123 | Done = true; | |||
3124 | } | |||
3125 | ||||
3126 | iterator_range<export_iterator> | |||
3127 | MachOObjectFile::exports(Error &E, ArrayRef<uint8_t> Trie, | |||
3128 | const MachOObjectFile *O) { | |||
3129 | ExportEntry Start(&E, O, Trie); | |||
3130 | if (Trie.empty()) | |||
3131 | Start.moveToEnd(); | |||
3132 | else | |||
3133 | Start.moveToFirst(); | |||
3134 | ||||
3135 | ExportEntry Finish(&E, O, Trie); | |||
3136 | Finish.moveToEnd(); | |||
3137 | ||||
3138 | return make_range(export_iterator(Start), export_iterator(Finish)); | |||
3139 | } | |||
3140 | ||||
3141 | iterator_range<export_iterator> MachOObjectFile::exports(Error &Err) const { | |||
3142 | return exports(Err, getDyldInfoExportsTrie(), this); | |||
3143 | } | |||
3144 | ||||
3145 | MachORebaseEntry::MachORebaseEntry(Error *E, const MachOObjectFile *O, | |||
3146 | ArrayRef<uint8_t> Bytes, bool is64Bit) | |||
3147 | : E(E), O(O), Opcodes(Bytes), Ptr(Bytes.begin()), | |||
3148 | PointerSize(is64Bit ? 8 : 4) {} | |||
3149 | ||||
3150 | void MachORebaseEntry::moveToFirst() { | |||
3151 | Ptr = Opcodes.begin(); | |||
3152 | moveNext(); | |||
3153 | } | |||
3154 | ||||
3155 | void MachORebaseEntry::moveToEnd() { | |||
3156 | Ptr = Opcodes.end(); | |||
3157 | RemainingLoopCount = 0; | |||
3158 | Done = true; | |||
3159 | } | |||
3160 | ||||
3161 | void MachORebaseEntry::moveNext() { | |||
3162 | ErrorAsOutParameter ErrAsOutParam(E); | |||
3163 | // If in the middle of some loop, move to next rebasing in loop. | |||
3164 | SegmentOffset += AdvanceAmount; | |||
3165 | if (RemainingLoopCount) { | |||
3166 | --RemainingLoopCount; | |||
3167 | return; | |||
3168 | } | |||
3169 | // REBASE_OPCODE_DONE is only used for padding if we are not aligned to | |||
3170 | // pointer size. Therefore it is possible to reach the end without ever having | |||
3171 | // seen REBASE_OPCODE_DONE. | |||
3172 | if (Ptr == Opcodes.end()) { | |||
3173 | Done = true; | |||
3174 | return; | |||
3175 | } | |||
3176 | bool More = true; | |||
3177 | while (More) { | |||
3178 | // Parse next opcode and set up next loop. | |||
3179 | const uint8_t *OpcodeStart = Ptr; | |||
3180 | uint8_t Byte = *Ptr++; | |||
3181 | uint8_t ImmValue = Byte & MachO::REBASE_IMMEDIATE_MASK; | |||
3182 | uint8_t Opcode = Byte & MachO::REBASE_OPCODE_MASK; | |||
3183 | uint32_t Count, Skip; | |||
3184 | const char *error = nullptr; | |||
3185 | switch (Opcode) { | |||
3186 | case MachO::REBASE_OPCODE_DONE: | |||
3187 | More = false; | |||
3188 | Done = true; | |||
3189 | moveToEnd(); | |||
3190 | DEBUG_WITH_TYPE("mach-o-rebase", dbgs() << "REBASE_OPCODE_DONE\n")do { } while (false); | |||
3191 | break; | |||
3192 | case MachO::REBASE_OPCODE_SET_TYPE_IMM: | |||
3193 | RebaseType = ImmValue; | |||
3194 | if (RebaseType > MachO::REBASE_TYPE_TEXT_PCREL32) { | |||
3195 | *E = malformedError("for REBASE_OPCODE_SET_TYPE_IMM bad bind type: " + | |||
3196 | Twine((int)RebaseType) + " for opcode at: 0x" + | |||
3197 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3198 | moveToEnd(); | |||
3199 | return; | |||
3200 | } | |||
3201 | DEBUG_WITH_TYPE(do { } while (false) | |||
3202 | "mach-o-rebase",do { } while (false) | |||
3203 | dbgs() << "REBASE_OPCODE_SET_TYPE_IMM: "do { } while (false) | |||
3204 | << "RebaseType=" << (int) RebaseType << "\n")do { } while (false); | |||
3205 | break; | |||
3206 | case MachO::REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: | |||
3207 | SegmentIndex = ImmValue; | |||
3208 | SegmentOffset = readULEB128(&error); | |||
3209 | if (error) { | |||
3210 | *E = malformedError("for REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " + | |||
3211 | Twine(error) + " for opcode at: 0x" + | |||
3212 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3213 | moveToEnd(); | |||
3214 | return; | |||
3215 | } | |||
3216 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3217 | PointerSize); | |||
3218 | if (error) { | |||
3219 | *E = malformedError("for REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " + | |||
3220 | Twine(error) + " for opcode at: 0x" + | |||
3221 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3222 | moveToEnd(); | |||
3223 | return; | |||
3224 | } | |||
3225 | DEBUG_WITH_TYPE(do { } while (false) | |||
3226 | "mach-o-rebase",do { } while (false) | |||
3227 | dbgs() << "REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "do { } while (false) | |||
3228 | << "SegmentIndex=" << SegmentIndex << ", "do { } while (false) | |||
3229 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3230 | << "\n")do { } while (false); | |||
3231 | break; | |||
3232 | case MachO::REBASE_OPCODE_ADD_ADDR_ULEB: | |||
3233 | SegmentOffset += readULEB128(&error); | |||
3234 | if (error) { | |||
3235 | *E = malformedError("for REBASE_OPCODE_ADD_ADDR_ULEB " + Twine(error) + | |||
3236 | " for opcode at: 0x" + | |||
3237 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3238 | moveToEnd(); | |||
3239 | return; | |||
3240 | } | |||
3241 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3242 | PointerSize); | |||
3243 | if (error) { | |||
3244 | *E = malformedError("for REBASE_OPCODE_ADD_ADDR_ULEB " + Twine(error) + | |||
3245 | " for opcode at: 0x" + | |||
3246 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3247 | moveToEnd(); | |||
3248 | return; | |||
3249 | } | |||
3250 | DEBUG_WITH_TYPE("mach-o-rebase",do { } while (false) | |||
3251 | dbgs() << "REBASE_OPCODE_ADD_ADDR_ULEB: "do { } while (false) | |||
3252 | << format("SegmentOffset=0x%06X",do { } while (false) | |||
3253 | SegmentOffset) << "\n")do { } while (false); | |||
3254 | break; | |||
3255 | case MachO::REBASE_OPCODE_ADD_ADDR_IMM_SCALED: | |||
3256 | SegmentOffset += ImmValue * PointerSize; | |||
3257 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3258 | PointerSize); | |||
3259 | if (error) { | |||
3260 | *E = malformedError("for REBASE_OPCODE_ADD_ADDR_IMM_SCALED " + | |||
3261 | Twine(error) + " for opcode at: 0x" + | |||
3262 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3263 | moveToEnd(); | |||
3264 | return; | |||
3265 | } | |||
3266 | DEBUG_WITH_TYPE("mach-o-rebase",do { } while (false) | |||
3267 | dbgs() << "REBASE_OPCODE_ADD_ADDR_IMM_SCALED: "do { } while (false) | |||
3268 | << format("SegmentOffset=0x%06X",do { } while (false) | |||
3269 | SegmentOffset) << "\n")do { } while (false); | |||
3270 | break; | |||
3271 | case MachO::REBASE_OPCODE_DO_REBASE_IMM_TIMES: | |||
3272 | AdvanceAmount = PointerSize; | |||
3273 | Skip = 0; | |||
3274 | Count = ImmValue; | |||
3275 | if (ImmValue != 0) | |||
3276 | RemainingLoopCount = ImmValue - 1; | |||
3277 | else | |||
3278 | RemainingLoopCount = 0; | |||
3279 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3280 | PointerSize, Count, Skip); | |||
3281 | if (error) { | |||
3282 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_IMM_TIMES " + | |||
3283 | Twine(error) + " for opcode at: 0x" + | |||
3284 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3285 | moveToEnd(); | |||
3286 | return; | |||
3287 | } | |||
3288 | DEBUG_WITH_TYPE(do { } while (false) | |||
3289 | "mach-o-rebase",do { } while (false) | |||
3290 | dbgs() << "REBASE_OPCODE_DO_REBASE_IMM_TIMES: "do { } while (false) | |||
3291 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3292 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3293 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3294 | << "\n")do { } while (false); | |||
3295 | return; | |||
3296 | case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES: | |||
3297 | AdvanceAmount = PointerSize; | |||
3298 | Skip = 0; | |||
3299 | Count = readULEB128(&error); | |||
3300 | if (error) { | |||
3301 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES " + | |||
3302 | Twine(error) + " for opcode at: 0x" + | |||
3303 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3304 | moveToEnd(); | |||
3305 | return; | |||
3306 | } | |||
3307 | if (Count != 0) | |||
3308 | RemainingLoopCount = Count - 1; | |||
3309 | else | |||
3310 | RemainingLoopCount = 0; | |||
3311 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3312 | PointerSize, Count, Skip); | |||
3313 | if (error) { | |||
3314 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES " + | |||
3315 | Twine(error) + " for opcode at: 0x" + | |||
3316 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3317 | moveToEnd(); | |||
3318 | return; | |||
3319 | } | |||
3320 | DEBUG_WITH_TYPE(do { } while (false) | |||
3321 | "mach-o-rebase",do { } while (false) | |||
3322 | dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES: "do { } while (false) | |||
3323 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3324 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3325 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3326 | << "\n")do { } while (false); | |||
3327 | return; | |||
3328 | case MachO::REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: | |||
3329 | Skip = readULEB128(&error); | |||
3330 | if (error) { | |||
3331 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB " + | |||
3332 | Twine(error) + " for opcode at: 0x" + | |||
3333 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3334 | moveToEnd(); | |||
3335 | return; | |||
3336 | } | |||
3337 | AdvanceAmount = Skip + PointerSize; | |||
3338 | Count = 1; | |||
3339 | RemainingLoopCount = 0; | |||
3340 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3341 | PointerSize, Count, Skip); | |||
3342 | if (error) { | |||
3343 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB " + | |||
3344 | Twine(error) + " for opcode at: 0x" + | |||
3345 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3346 | moveToEnd(); | |||
3347 | return; | |||
3348 | } | |||
3349 | DEBUG_WITH_TYPE(do { } while (false) | |||
3350 | "mach-o-rebase",do { } while (false) | |||
3351 | dbgs() << "REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: "do { } while (false) | |||
3352 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3353 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3354 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3355 | << "\n")do { } while (false); | |||
3356 | return; | |||
3357 | case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: | |||
3358 | Count = readULEB128(&error); | |||
3359 | if (error) { | |||
3360 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_" | |||
3361 | "ULEB " + | |||
3362 | Twine(error) + " for opcode at: 0x" + | |||
3363 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3364 | moveToEnd(); | |||
3365 | return; | |||
3366 | } | |||
3367 | if (Count != 0) | |||
3368 | RemainingLoopCount = Count - 1; | |||
3369 | else | |||
3370 | RemainingLoopCount = 0; | |||
3371 | Skip = readULEB128(&error); | |||
3372 | if (error) { | |||
3373 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_" | |||
3374 | "ULEB " + | |||
3375 | Twine(error) + " for opcode at: 0x" + | |||
3376 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3377 | moveToEnd(); | |||
3378 | return; | |||
3379 | } | |||
3380 | AdvanceAmount = Skip + PointerSize; | |||
3381 | ||||
3382 | error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3383 | PointerSize, Count, Skip); | |||
3384 | if (error) { | |||
3385 | *E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_" | |||
3386 | "ULEB " + | |||
3387 | Twine(error) + " for opcode at: 0x" + | |||
3388 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3389 | moveToEnd(); | |||
3390 | return; | |||
3391 | } | |||
3392 | DEBUG_WITH_TYPE(do { } while (false) | |||
3393 | "mach-o-rebase",do { } while (false) | |||
3394 | dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: "do { } while (false) | |||
3395 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3396 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3397 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3398 | << "\n")do { } while (false); | |||
3399 | return; | |||
3400 | default: | |||
3401 | *E = malformedError("bad rebase info (bad opcode value 0x" + | |||
3402 | Twine::utohexstr(Opcode) + " for opcode at: 0x" + | |||
3403 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3404 | moveToEnd(); | |||
3405 | return; | |||
3406 | } | |||
3407 | } | |||
3408 | } | |||
3409 | ||||
3410 | uint64_t MachORebaseEntry::readULEB128(const char **error) { | |||
3411 | unsigned Count; | |||
3412 | uint64_t Result = decodeULEB128(Ptr, &Count, Opcodes.end(), error); | |||
3413 | Ptr += Count; | |||
3414 | if (Ptr > Opcodes.end()) | |||
3415 | Ptr = Opcodes.end(); | |||
3416 | return Result; | |||
3417 | } | |||
3418 | ||||
3419 | int32_t MachORebaseEntry::segmentIndex() const { return SegmentIndex; } | |||
3420 | ||||
3421 | uint64_t MachORebaseEntry::segmentOffset() const { return SegmentOffset; } | |||
3422 | ||||
3423 | StringRef MachORebaseEntry::typeName() const { | |||
3424 | switch (RebaseType) { | |||
3425 | case MachO::REBASE_TYPE_POINTER: | |||
3426 | return "pointer"; | |||
3427 | case MachO::REBASE_TYPE_TEXT_ABSOLUTE32: | |||
3428 | return "text abs32"; | |||
3429 | case MachO::REBASE_TYPE_TEXT_PCREL32: | |||
3430 | return "text rel32"; | |||
3431 | } | |||
3432 | return "unknown"; | |||
3433 | } | |||
3434 | ||||
3435 | // For use with the SegIndex of a checked Mach-O Rebase entry | |||
3436 | // to get the segment name. | |||
3437 | StringRef MachORebaseEntry::segmentName() const { | |||
3438 | return O->BindRebaseSegmentName(SegmentIndex); | |||
3439 | } | |||
3440 | ||||
3441 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Rebase entry | |||
3442 | // to get the section name. | |||
3443 | StringRef MachORebaseEntry::sectionName() const { | |||
3444 | return O->BindRebaseSectionName(SegmentIndex, SegmentOffset); | |||
3445 | } | |||
3446 | ||||
3447 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Rebase entry | |||
3448 | // to get the address. | |||
3449 | uint64_t MachORebaseEntry::address() const { | |||
3450 | return O->BindRebaseAddress(SegmentIndex, SegmentOffset); | |||
3451 | } | |||
3452 | ||||
3453 | bool MachORebaseEntry::operator==(const MachORebaseEntry &Other) const { | |||
3454 | #ifdef EXPENSIVE_CHECKS | |||
3455 | assert(Opcodes == Other.Opcodes && "compare iterators of different files")((void)0); | |||
3456 | #else | |||
3457 | assert(Opcodes.data() == Other.Opcodes.data() && "compare iterators of different files")((void)0); | |||
3458 | #endif | |||
3459 | return (Ptr == Other.Ptr) && | |||
3460 | (RemainingLoopCount == Other.RemainingLoopCount) && | |||
3461 | (Done == Other.Done); | |||
3462 | } | |||
3463 | ||||
3464 | iterator_range<rebase_iterator> | |||
3465 | MachOObjectFile::rebaseTable(Error &Err, MachOObjectFile *O, | |||
3466 | ArrayRef<uint8_t> Opcodes, bool is64) { | |||
3467 | if (O->BindRebaseSectionTable == nullptr) | |||
3468 | O->BindRebaseSectionTable = std::make_unique<BindRebaseSegInfo>(O); | |||
3469 | MachORebaseEntry Start(&Err, O, Opcodes, is64); | |||
3470 | Start.moveToFirst(); | |||
3471 | ||||
3472 | MachORebaseEntry Finish(&Err, O, Opcodes, is64); | |||
3473 | Finish.moveToEnd(); | |||
3474 | ||||
3475 | return make_range(rebase_iterator(Start), rebase_iterator(Finish)); | |||
3476 | } | |||
3477 | ||||
3478 | iterator_range<rebase_iterator> MachOObjectFile::rebaseTable(Error &Err) { | |||
3479 | return rebaseTable(Err, this, getDyldInfoRebaseOpcodes(), is64Bit()); | |||
3480 | } | |||
3481 | ||||
3482 | MachOBindEntry::MachOBindEntry(Error *E, const MachOObjectFile *O, | |||
3483 | ArrayRef<uint8_t> Bytes, bool is64Bit, Kind BK) | |||
3484 | : E(E), O(O), Opcodes(Bytes), Ptr(Bytes.begin()), | |||
3485 | PointerSize(is64Bit ? 8 : 4), TableKind(BK) {} | |||
3486 | ||||
3487 | void MachOBindEntry::moveToFirst() { | |||
3488 | Ptr = Opcodes.begin(); | |||
3489 | moveNext(); | |||
3490 | } | |||
3491 | ||||
3492 | void MachOBindEntry::moveToEnd() { | |||
3493 | Ptr = Opcodes.end(); | |||
3494 | RemainingLoopCount = 0; | |||
3495 | Done = true; | |||
3496 | } | |||
3497 | ||||
3498 | void MachOBindEntry::moveNext() { | |||
3499 | ErrorAsOutParameter ErrAsOutParam(E); | |||
3500 | // If in the middle of some loop, move to next binding in loop. | |||
3501 | SegmentOffset += AdvanceAmount; | |||
3502 | if (RemainingLoopCount) { | |||
3503 | --RemainingLoopCount; | |||
3504 | return; | |||
3505 | } | |||
3506 | // BIND_OPCODE_DONE is only used for padding if we are not aligned to | |||
3507 | // pointer size. Therefore it is possible to reach the end without ever having | |||
3508 | // seen BIND_OPCODE_DONE. | |||
3509 | if (Ptr == Opcodes.end()) { | |||
3510 | Done = true; | |||
3511 | return; | |||
3512 | } | |||
3513 | bool More = true; | |||
3514 | while (More) { | |||
3515 | // Parse next opcode and set up next loop. | |||
3516 | const uint8_t *OpcodeStart = Ptr; | |||
3517 | uint8_t Byte = *Ptr++; | |||
3518 | uint8_t ImmValue = Byte & MachO::BIND_IMMEDIATE_MASK; | |||
3519 | uint8_t Opcode = Byte & MachO::BIND_OPCODE_MASK; | |||
3520 | int8_t SignExtended; | |||
3521 | const uint8_t *SymStart; | |||
3522 | uint32_t Count, Skip; | |||
3523 | const char *error = nullptr; | |||
3524 | switch (Opcode) { | |||
3525 | case MachO::BIND_OPCODE_DONE: | |||
3526 | if (TableKind == Kind::Lazy) { | |||
3527 | // Lazying bindings have a DONE opcode between entries. Need to ignore | |||
3528 | // it to advance to next entry. But need not if this is last entry. | |||
3529 | bool NotLastEntry = false; | |||
3530 | for (const uint8_t *P = Ptr; P < Opcodes.end(); ++P) { | |||
3531 | if (*P) { | |||
3532 | NotLastEntry = true; | |||
3533 | } | |||
3534 | } | |||
3535 | if (NotLastEntry) | |||
3536 | break; | |||
3537 | } | |||
3538 | More = false; | |||
3539 | moveToEnd(); | |||
3540 | DEBUG_WITH_TYPE("mach-o-bind", dbgs() << "BIND_OPCODE_DONE\n")do { } while (false); | |||
3541 | break; | |||
3542 | case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: | |||
3543 | if (TableKind == Kind::Weak) { | |||
3544 | *E = malformedError("BIND_OPCODE_SET_DYLIB_ORDINAL_IMM not allowed in " | |||
3545 | "weak bind table for opcode at: 0x" + | |||
3546 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3547 | moveToEnd(); | |||
3548 | return; | |||
3549 | } | |||
3550 | Ordinal = ImmValue; | |||
3551 | LibraryOrdinalSet = true; | |||
3552 | if (ImmValue > O->getLibraryCount()) { | |||
3553 | *E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB bad " | |||
3554 | "library ordinal: " + | |||
3555 | Twine((int)ImmValue) + " (max " + | |||
3556 | Twine((int)O->getLibraryCount()) + | |||
3557 | ") for opcode at: 0x" + | |||
3558 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3559 | moveToEnd(); | |||
3560 | return; | |||
3561 | } | |||
3562 | DEBUG_WITH_TYPE(do { } while (false) | |||
3563 | "mach-o-bind",do { } while (false) | |||
3564 | dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: "do { } while (false) | |||
3565 | << "Ordinal=" << Ordinal << "\n")do { } while (false); | |||
3566 | break; | |||
3567 | case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: | |||
3568 | if (TableKind == Kind::Weak) { | |||
3569 | *E = malformedError("BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB not allowed in " | |||
3570 | "weak bind table for opcode at: 0x" + | |||
3571 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3572 | moveToEnd(); | |||
3573 | return; | |||
3574 | } | |||
3575 | Ordinal = readULEB128(&error); | |||
3576 | LibraryOrdinalSet = true; | |||
3577 | if (error) { | |||
3578 | *E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB " + | |||
3579 | Twine(error) + " for opcode at: 0x" + | |||
3580 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3581 | moveToEnd(); | |||
3582 | return; | |||
3583 | } | |||
3584 | if (Ordinal > (int)O->getLibraryCount()) { | |||
3585 | *E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB bad " | |||
3586 | "library ordinal: " + | |||
3587 | Twine((int)Ordinal) + " (max " + | |||
3588 | Twine((int)O->getLibraryCount()) + | |||
3589 | ") for opcode at: 0x" + | |||
3590 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3591 | moveToEnd(); | |||
3592 | return; | |||
3593 | } | |||
3594 | DEBUG_WITH_TYPE(do { } while (false) | |||
3595 | "mach-o-bind",do { } while (false) | |||
3596 | dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: "do { } while (false) | |||
3597 | << "Ordinal=" << Ordinal << "\n")do { } while (false); | |||
3598 | break; | |||
3599 | case MachO::BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: | |||
3600 | if (TableKind == Kind::Weak) { | |||
3601 | *E = malformedError("BIND_OPCODE_SET_DYLIB_SPECIAL_IMM not allowed in " | |||
3602 | "weak bind table for opcode at: 0x" + | |||
3603 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3604 | moveToEnd(); | |||
3605 | return; | |||
3606 | } | |||
3607 | if (ImmValue) { | |||
3608 | SignExtended = MachO::BIND_OPCODE_MASK | ImmValue; | |||
3609 | Ordinal = SignExtended; | |||
3610 | if (Ordinal < MachO::BIND_SPECIAL_DYLIB_FLAT_LOOKUP) { | |||
3611 | *E = malformedError("for BIND_OPCODE_SET_DYLIB_SPECIAL_IMM unknown " | |||
3612 | "special ordinal: " + | |||
3613 | Twine((int)Ordinal) + " for opcode at: 0x" + | |||
3614 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3615 | moveToEnd(); | |||
3616 | return; | |||
3617 | } | |||
3618 | } else | |||
3619 | Ordinal = 0; | |||
3620 | LibraryOrdinalSet = true; | |||
3621 | DEBUG_WITH_TYPE(do { } while (false) | |||
3622 | "mach-o-bind",do { } while (false) | |||
3623 | dbgs() << "BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: "do { } while (false) | |||
3624 | << "Ordinal=" << Ordinal << "\n")do { } while (false); | |||
3625 | break; | |||
3626 | case MachO::BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: | |||
3627 | Flags = ImmValue; | |||
3628 | SymStart = Ptr; | |||
3629 | while (*Ptr && (Ptr < Opcodes.end())) { | |||
3630 | ++Ptr; | |||
3631 | } | |||
3632 | if (Ptr == Opcodes.end()) { | |||
3633 | *E = malformedError( | |||
3634 | "for BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM " | |||
3635 | "symbol name extends past opcodes for opcode at: 0x" + | |||
3636 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3637 | moveToEnd(); | |||
3638 | return; | |||
3639 | } | |||
3640 | SymbolName = StringRef(reinterpret_cast<const char*>(SymStart), | |||
3641 | Ptr-SymStart); | |||
3642 | ++Ptr; | |||
3643 | DEBUG_WITH_TYPE(do { } while (false) | |||
3644 | "mach-o-bind",do { } while (false) | |||
3645 | dbgs() << "BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: "do { } while (false) | |||
3646 | << "SymbolName=" << SymbolName << "\n")do { } while (false); | |||
3647 | if (TableKind == Kind::Weak) { | |||
3648 | if (ImmValue & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION) | |||
3649 | return; | |||
3650 | } | |||
3651 | break; | |||
3652 | case MachO::BIND_OPCODE_SET_TYPE_IMM: | |||
3653 | BindType = ImmValue; | |||
3654 | if (ImmValue > MachO::BIND_TYPE_TEXT_PCREL32) { | |||
3655 | *E = malformedError("for BIND_OPCODE_SET_TYPE_IMM bad bind type: " + | |||
3656 | Twine((int)ImmValue) + " for opcode at: 0x" + | |||
3657 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3658 | moveToEnd(); | |||
3659 | return; | |||
3660 | } | |||
3661 | DEBUG_WITH_TYPE(do { } while (false) | |||
3662 | "mach-o-bind",do { } while (false) | |||
3663 | dbgs() << "BIND_OPCODE_SET_TYPE_IMM: "do { } while (false) | |||
3664 | << "BindType=" << (int)BindType << "\n")do { } while (false); | |||
3665 | break; | |||
3666 | case MachO::BIND_OPCODE_SET_ADDEND_SLEB: | |||
3667 | Addend = readSLEB128(&error); | |||
3668 | if (error) { | |||
3669 | *E = malformedError("for BIND_OPCODE_SET_ADDEND_SLEB " + Twine(error) + | |||
3670 | " for opcode at: 0x" + | |||
3671 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3672 | moveToEnd(); | |||
3673 | return; | |||
3674 | } | |||
3675 | DEBUG_WITH_TYPE(do { } while (false) | |||
3676 | "mach-o-bind",do { } while (false) | |||
3677 | dbgs() << "BIND_OPCODE_SET_ADDEND_SLEB: "do { } while (false) | |||
3678 | << "Addend=" << Addend << "\n")do { } while (false); | |||
3679 | break; | |||
3680 | case MachO::BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: | |||
3681 | SegmentIndex = ImmValue; | |||
3682 | SegmentOffset = readULEB128(&error); | |||
3683 | if (error) { | |||
3684 | *E = malformedError("for BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " + | |||
3685 | Twine(error) + " for opcode at: 0x" + | |||
3686 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3687 | moveToEnd(); | |||
3688 | return; | |||
3689 | } | |||
3690 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3691 | PointerSize); | |||
3692 | if (error) { | |||
3693 | *E = malformedError("for BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " + | |||
3694 | Twine(error) + " for opcode at: 0x" + | |||
3695 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3696 | moveToEnd(); | |||
3697 | return; | |||
3698 | } | |||
3699 | DEBUG_WITH_TYPE(do { } while (false) | |||
3700 | "mach-o-bind",do { } while (false) | |||
3701 | dbgs() << "BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "do { } while (false) | |||
3702 | << "SegmentIndex=" << SegmentIndex << ", "do { } while (false) | |||
3703 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3704 | << "\n")do { } while (false); | |||
3705 | break; | |||
3706 | case MachO::BIND_OPCODE_ADD_ADDR_ULEB: | |||
3707 | SegmentOffset += readULEB128(&error); | |||
3708 | if (error) { | |||
3709 | *E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB " + Twine(error) + | |||
3710 | " for opcode at: 0x" + | |||
3711 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3712 | moveToEnd(); | |||
3713 | return; | |||
3714 | } | |||
3715 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3716 | PointerSize); | |||
3717 | if (error) { | |||
3718 | *E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB " + Twine(error) + | |||
3719 | " for opcode at: 0x" + | |||
3720 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3721 | moveToEnd(); | |||
3722 | return; | |||
3723 | } | |||
3724 | DEBUG_WITH_TYPE("mach-o-bind",do { } while (false) | |||
3725 | dbgs() << "BIND_OPCODE_ADD_ADDR_ULEB: "do { } while (false) | |||
3726 | << format("SegmentOffset=0x%06X",do { } while (false) | |||
3727 | SegmentOffset) << "\n")do { } while (false); | |||
3728 | break; | |||
3729 | case MachO::BIND_OPCODE_DO_BIND: | |||
3730 | AdvanceAmount = PointerSize; | |||
3731 | RemainingLoopCount = 0; | |||
3732 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3733 | PointerSize); | |||
3734 | if (error) { | |||
3735 | *E = malformedError("for BIND_OPCODE_DO_BIND " + Twine(error) + | |||
3736 | " for opcode at: 0x" + | |||
3737 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3738 | moveToEnd(); | |||
3739 | return; | |||
3740 | } | |||
3741 | if (SymbolName == StringRef()) { | |||
3742 | *E = malformedError( | |||
3743 | "for BIND_OPCODE_DO_BIND missing preceding " | |||
3744 | "BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for opcode at: 0x" + | |||
3745 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3746 | moveToEnd(); | |||
3747 | return; | |||
3748 | } | |||
3749 | if (!LibraryOrdinalSet && TableKind != Kind::Weak) { | |||
3750 | *E = | |||
3751 | malformedError("for BIND_OPCODE_DO_BIND missing preceding " | |||
3752 | "BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode at: 0x" + | |||
3753 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3754 | moveToEnd(); | |||
3755 | return; | |||
3756 | } | |||
3757 | DEBUG_WITH_TYPE("mach-o-bind",do { } while (false) | |||
3758 | dbgs() << "BIND_OPCODE_DO_BIND: "do { } while (false) | |||
3759 | << format("SegmentOffset=0x%06X",do { } while (false) | |||
3760 | SegmentOffset) << "\n")do { } while (false); | |||
3761 | return; | |||
3762 | case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: | |||
3763 | if (TableKind == Kind::Lazy) { | |||
3764 | *E = malformedError("BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB not allowed in " | |||
3765 | "lazy bind table for opcode at: 0x" + | |||
3766 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3767 | moveToEnd(); | |||
3768 | return; | |||
3769 | } | |||
3770 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3771 | PointerSize); | |||
3772 | if (error) { | |||
3773 | *E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB " + | |||
3774 | Twine(error) + " for opcode at: 0x" + | |||
3775 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3776 | moveToEnd(); | |||
3777 | return; | |||
3778 | } | |||
3779 | if (SymbolName == StringRef()) { | |||
3780 | *E = malformedError( | |||
3781 | "for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB missing " | |||
3782 | "preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for opcode " | |||
3783 | "at: 0x" + | |||
3784 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3785 | moveToEnd(); | |||
3786 | return; | |||
3787 | } | |||
3788 | if (!LibraryOrdinalSet && TableKind != Kind::Weak) { | |||
3789 | *E = malformedError( | |||
3790 | "for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB missing " | |||
3791 | "preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode at: 0x" + | |||
3792 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3793 | moveToEnd(); | |||
3794 | return; | |||
3795 | } | |||
3796 | AdvanceAmount = readULEB128(&error) + PointerSize; | |||
3797 | if (error) { | |||
3798 | *E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB " + | |||
3799 | Twine(error) + " for opcode at: 0x" + | |||
3800 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3801 | moveToEnd(); | |||
3802 | return; | |||
3803 | } | |||
3804 | // Note, this is not really an error until the next bind but make no sense | |||
3805 | // for a BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB to not be followed by another | |||
3806 | // bind operation. | |||
3807 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset + | |||
3808 | AdvanceAmount, PointerSize); | |||
3809 | if (error) { | |||
3810 | *E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB (after adding " | |||
3811 | "ULEB) " + | |||
3812 | Twine(error) + " for opcode at: 0x" + | |||
3813 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3814 | moveToEnd(); | |||
3815 | return; | |||
3816 | } | |||
3817 | RemainingLoopCount = 0; | |||
3818 | DEBUG_WITH_TYPE(do { } while (false) | |||
3819 | "mach-o-bind",do { } while (false) | |||
3820 | dbgs() << "BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: "do { } while (false) | |||
3821 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3822 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3823 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3824 | << "\n")do { } while (false); | |||
3825 | return; | |||
3826 | case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: | |||
3827 | if (TableKind == Kind::Lazy) { | |||
3828 | *E = malformedError("BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED not " | |||
3829 | "allowed in lazy bind table for opcode at: 0x" + | |||
3830 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3831 | moveToEnd(); | |||
3832 | return; | |||
3833 | } | |||
3834 | if (SymbolName == StringRef()) { | |||
3835 | *E = malformedError( | |||
3836 | "for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED " | |||
3837 | "missing preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for " | |||
3838 | "opcode at: 0x" + | |||
3839 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3840 | moveToEnd(); | |||
3841 | return; | |||
3842 | } | |||
3843 | if (!LibraryOrdinalSet && TableKind != Kind::Weak) { | |||
3844 | *E = malformedError( | |||
3845 | "for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED " | |||
3846 | "missing preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode " | |||
3847 | "at: 0x" + | |||
3848 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3849 | moveToEnd(); | |||
3850 | return; | |||
3851 | } | |||
3852 | AdvanceAmount = ImmValue * PointerSize + PointerSize; | |||
3853 | RemainingLoopCount = 0; | |||
3854 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset + | |||
3855 | AdvanceAmount, PointerSize); | |||
3856 | if (error) { | |||
3857 | *E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED " + | |||
3858 | Twine(error) + " for opcode at: 0x" + | |||
3859 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3860 | moveToEnd(); | |||
3861 | return; | |||
3862 | } | |||
3863 | DEBUG_WITH_TYPE("mach-o-bind",do { } while (false) | |||
3864 | dbgs()do { } while (false) | |||
3865 | << "BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: "do { } while (false) | |||
3866 | << format("SegmentOffset=0x%06X", SegmentOffset) << "\n")do { } while (false); | |||
3867 | return; | |||
3868 | case MachO::BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: | |||
3869 | if (TableKind == Kind::Lazy) { | |||
3870 | *E = malformedError("BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB not " | |||
3871 | "allowed in lazy bind table for opcode at: 0x" + | |||
3872 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3873 | moveToEnd(); | |||
3874 | return; | |||
3875 | } | |||
3876 | Count = readULEB128(&error); | |||
3877 | if (Count != 0) | |||
3878 | RemainingLoopCount = Count - 1; | |||
3879 | else | |||
3880 | RemainingLoopCount = 0; | |||
3881 | if (error) { | |||
3882 | *E = malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " | |||
3883 | " (count value) " + | |||
3884 | Twine(error) + " for opcode at: 0x" + | |||
3885 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3886 | moveToEnd(); | |||
3887 | return; | |||
3888 | } | |||
3889 | Skip = readULEB128(&error); | |||
3890 | AdvanceAmount = Skip + PointerSize; | |||
3891 | if (error) { | |||
3892 | *E = malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " | |||
3893 | " (skip value) " + | |||
3894 | Twine(error) + " for opcode at: 0x" + | |||
3895 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3896 | moveToEnd(); | |||
3897 | return; | |||
3898 | } | |||
3899 | if (SymbolName == StringRef()) { | |||
3900 | *E = malformedError( | |||
3901 | "for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " | |||
3902 | "missing preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for " | |||
3903 | "opcode at: 0x" + | |||
3904 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3905 | moveToEnd(); | |||
3906 | return; | |||
3907 | } | |||
3908 | if (!LibraryOrdinalSet && TableKind != Kind::Weak) { | |||
3909 | *E = malformedError( | |||
3910 | "for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " | |||
3911 | "missing preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode " | |||
3912 | "at: 0x" + | |||
3913 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3914 | moveToEnd(); | |||
3915 | return; | |||
3916 | } | |||
3917 | error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset, | |||
3918 | PointerSize, Count, Skip); | |||
3919 | if (error) { | |||
3920 | *E = | |||
3921 | malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " + | |||
3922 | Twine(error) + " for opcode at: 0x" + | |||
3923 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3924 | moveToEnd(); | |||
3925 | return; | |||
3926 | } | |||
3927 | DEBUG_WITH_TYPE(do { } while (false) | |||
3928 | "mach-o-bind",do { } while (false) | |||
3929 | dbgs() << "BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: "do { } while (false) | |||
3930 | << format("SegmentOffset=0x%06X", SegmentOffset)do { } while (false) | |||
3931 | << ", AdvanceAmount=" << AdvanceAmountdo { } while (false) | |||
3932 | << ", RemainingLoopCount=" << RemainingLoopCountdo { } while (false) | |||
3933 | << "\n")do { } while (false); | |||
3934 | return; | |||
3935 | default: | |||
3936 | *E = malformedError("bad bind info (bad opcode value 0x" + | |||
3937 | Twine::utohexstr(Opcode) + " for opcode at: 0x" + | |||
3938 | Twine::utohexstr(OpcodeStart - Opcodes.begin())); | |||
3939 | moveToEnd(); | |||
3940 | return; | |||
3941 | } | |||
3942 | } | |||
3943 | } | |||
3944 | ||||
3945 | uint64_t MachOBindEntry::readULEB128(const char **error) { | |||
3946 | unsigned Count; | |||
3947 | uint64_t Result = decodeULEB128(Ptr, &Count, Opcodes.end(), error); | |||
3948 | Ptr += Count; | |||
3949 | if (Ptr > Opcodes.end()) | |||
3950 | Ptr = Opcodes.end(); | |||
3951 | return Result; | |||
3952 | } | |||
3953 | ||||
3954 | int64_t MachOBindEntry::readSLEB128(const char **error) { | |||
3955 | unsigned Count; | |||
3956 | int64_t Result = decodeSLEB128(Ptr, &Count, Opcodes.end(), error); | |||
3957 | Ptr += Count; | |||
3958 | if (Ptr > Opcodes.end()) | |||
3959 | Ptr = Opcodes.end(); | |||
3960 | return Result; | |||
3961 | } | |||
3962 | ||||
3963 | int32_t MachOBindEntry::segmentIndex() const { return SegmentIndex; } | |||
3964 | ||||
3965 | uint64_t MachOBindEntry::segmentOffset() const { return SegmentOffset; } | |||
3966 | ||||
3967 | StringRef MachOBindEntry::typeName() const { | |||
3968 | switch (BindType) { | |||
3969 | case MachO::BIND_TYPE_POINTER: | |||
3970 | return "pointer"; | |||
3971 | case MachO::BIND_TYPE_TEXT_ABSOLUTE32: | |||
3972 | return "text abs32"; | |||
3973 | case MachO::BIND_TYPE_TEXT_PCREL32: | |||
3974 | return "text rel32"; | |||
3975 | } | |||
3976 | return "unknown"; | |||
3977 | } | |||
3978 | ||||
3979 | StringRef MachOBindEntry::symbolName() const { return SymbolName; } | |||
3980 | ||||
3981 | int64_t MachOBindEntry::addend() const { return Addend; } | |||
3982 | ||||
3983 | uint32_t MachOBindEntry::flags() const { return Flags; } | |||
3984 | ||||
3985 | int MachOBindEntry::ordinal() const { return Ordinal; } | |||
3986 | ||||
3987 | // For use with the SegIndex of a checked Mach-O Bind entry | |||
3988 | // to get the segment name. | |||
3989 | StringRef MachOBindEntry::segmentName() const { | |||
3990 | return O->BindRebaseSegmentName(SegmentIndex); | |||
3991 | } | |||
3992 | ||||
3993 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Bind entry | |||
3994 | // to get the section name. | |||
3995 | StringRef MachOBindEntry::sectionName() const { | |||
3996 | return O->BindRebaseSectionName(SegmentIndex, SegmentOffset); | |||
3997 | } | |||
3998 | ||||
3999 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Bind entry | |||
4000 | // to get the address. | |||
4001 | uint64_t MachOBindEntry::address() const { | |||
4002 | return O->BindRebaseAddress(SegmentIndex, SegmentOffset); | |||
4003 | } | |||
4004 | ||||
4005 | bool MachOBindEntry::operator==(const MachOBindEntry &Other) const { | |||
4006 | #ifdef EXPENSIVE_CHECKS | |||
4007 | assert(Opcodes == Other.Opcodes && "compare iterators of different files")((void)0); | |||
4008 | #else | |||
4009 | assert(Opcodes.data() == Other.Opcodes.data() && "compare iterators of different files")((void)0); | |||
4010 | #endif | |||
4011 | return (Ptr == Other.Ptr) && | |||
4012 | (RemainingLoopCount == Other.RemainingLoopCount) && | |||
4013 | (Done == Other.Done); | |||
4014 | } | |||
4015 | ||||
4016 | // Build table of sections so SegIndex/SegOffset pairs can be translated. | |||
4017 | BindRebaseSegInfo::BindRebaseSegInfo(const object::MachOObjectFile *Obj) { | |||
4018 | uint32_t CurSegIndex = Obj->hasPageZeroSegment() ? 1 : 0; | |||
4019 | StringRef CurSegName; | |||
4020 | uint64_t CurSegAddress; | |||
4021 | for (const SectionRef &Section : Obj->sections()) { | |||
4022 | SectionInfo Info; | |||
4023 | Expected<StringRef> NameOrErr = Section.getName(); | |||
4024 | if (!NameOrErr) | |||
4025 | consumeError(NameOrErr.takeError()); | |||
4026 | else | |||
4027 | Info.SectionName = *NameOrErr; | |||
4028 | Info.Address = Section.getAddress(); | |||
4029 | Info.Size = Section.getSize(); | |||
4030 | Info.SegmentName = | |||
4031 | Obj->getSectionFinalSegmentName(Section.getRawDataRefImpl()); | |||
4032 | if (!Info.SegmentName.equals(CurSegName)) { | |||
4033 | ++CurSegIndex; | |||
4034 | CurSegName = Info.SegmentName; | |||
4035 | CurSegAddress = Info.Address; | |||
4036 | } | |||
4037 | Info.SegmentIndex = CurSegIndex - 1; | |||
4038 | Info.OffsetInSegment = Info.Address - CurSegAddress; | |||
| ||||
4039 | Info.SegmentStartAddress = CurSegAddress; | |||
4040 | Sections.push_back(Info); | |||
4041 | } | |||
4042 | MaxSegIndex = CurSegIndex; | |||
4043 | } | |||
4044 | ||||
4045 | // For use with a SegIndex, SegOffset, and PointerSize triple in | |||
4046 | // MachOBindEntry::moveNext() to validate a MachOBindEntry or MachORebaseEntry. | |||
4047 | // | |||
4048 | // Given a SegIndex, SegOffset, and PointerSize, verify a valid section exists | |||
4049 | // that fully contains a pointer at that location. Multiple fixups in a bind | |||
4050 | // (such as with the BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB opcode) can | |||
4051 | // be tested via the Count and Skip parameters. | |||
4052 | const char * BindRebaseSegInfo::checkSegAndOffsets(int32_t SegIndex, | |||
4053 | uint64_t SegOffset, | |||
4054 | uint8_t PointerSize, | |||
4055 | uint32_t Count, | |||
4056 | uint32_t Skip) { | |||
4057 | if (SegIndex == -1) | |||
4058 | return "missing preceding *_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB"; | |||
4059 | if (SegIndex >= MaxSegIndex) | |||
4060 | return "bad segIndex (too large)"; | |||
4061 | for (uint32_t i = 0; i < Count; ++i) { | |||
4062 | uint32_t Start = SegOffset + i * (PointerSize + Skip); | |||
4063 | uint32_t End = Start + PointerSize; | |||
4064 | bool Found = false; | |||
4065 | for (const SectionInfo &SI : Sections) { | |||
4066 | if (SI.SegmentIndex != SegIndex) | |||
4067 | continue; | |||
4068 | if ((SI.OffsetInSegment<=Start) && (Start<(SI.OffsetInSegment+SI.Size))) { | |||
4069 | if (End <= SI.OffsetInSegment + SI.Size) { | |||
4070 | Found = true; | |||
4071 | break; | |||
4072 | } | |||
4073 | else | |||
4074 | return "bad offset, extends beyond section boundary"; | |||
4075 | } | |||
4076 | } | |||
4077 | if (!Found) | |||
4078 | return "bad offset, not in section"; | |||
4079 | } | |||
4080 | return nullptr; | |||
4081 | } | |||
4082 | ||||
4083 | // For use with the SegIndex of a checked Mach-O Bind or Rebase entry | |||
4084 | // to get the segment name. | |||
4085 | StringRef BindRebaseSegInfo::segmentName(int32_t SegIndex) { | |||
4086 | for (const SectionInfo &SI : Sections) { | |||
4087 | if (SI.SegmentIndex == SegIndex) | |||
4088 | return SI.SegmentName; | |||
4089 | } | |||
4090 | llvm_unreachable("invalid SegIndex")__builtin_unreachable(); | |||
4091 | } | |||
4092 | ||||
4093 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase | |||
4094 | // to get the SectionInfo. | |||
4095 | const BindRebaseSegInfo::SectionInfo &BindRebaseSegInfo::findSection( | |||
4096 | int32_t SegIndex, uint64_t SegOffset) { | |||
4097 | for (const SectionInfo &SI : Sections) { | |||
4098 | if (SI.SegmentIndex != SegIndex) | |||
4099 | continue; | |||
4100 | if (SI.OffsetInSegment > SegOffset) | |||
4101 | continue; | |||
4102 | if (SegOffset >= (SI.OffsetInSegment + SI.Size)) | |||
4103 | continue; | |||
4104 | return SI; | |||
4105 | } | |||
4106 | llvm_unreachable("SegIndex and SegOffset not in any section")__builtin_unreachable(); | |||
4107 | } | |||
4108 | ||||
4109 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase | |||
4110 | // entry to get the section name. | |||
4111 | StringRef BindRebaseSegInfo::sectionName(int32_t SegIndex, | |||
4112 | uint64_t SegOffset) { | |||
4113 | return findSection(SegIndex, SegOffset).SectionName; | |||
4114 | } | |||
4115 | ||||
4116 | // For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase | |||
4117 | // entry to get the address. | |||
4118 | uint64_t BindRebaseSegInfo::address(uint32_t SegIndex, uint64_t OffsetInSeg) { | |||
4119 | const SectionInfo &SI = findSection(SegIndex, OffsetInSeg); | |||
4120 | return SI.SegmentStartAddress + OffsetInSeg; | |||
4121 | } | |||
4122 | ||||
4123 | iterator_range<bind_iterator> | |||
4124 | MachOObjectFile::bindTable(Error &Err, MachOObjectFile *O, | |||
4125 | ArrayRef<uint8_t> Opcodes, bool is64, | |||
4126 | MachOBindEntry::Kind BKind) { | |||
4127 | if (O->BindRebaseSectionTable == nullptr) | |||
4128 | O->BindRebaseSectionTable = std::make_unique<BindRebaseSegInfo>(O); | |||
4129 | MachOBindEntry Start(&Err, O, Opcodes, is64, BKind); | |||
4130 | Start.moveToFirst(); | |||
4131 | ||||
4132 | MachOBindEntry Finish(&Err, O, Opcodes, is64, BKind); | |||
4133 | Finish.moveToEnd(); | |||
4134 | ||||
4135 | return make_range(bind_iterator(Start), bind_iterator(Finish)); | |||
4136 | } | |||
4137 | ||||
4138 | iterator_range<bind_iterator> MachOObjectFile::bindTable(Error &Err) { | |||
4139 | return bindTable(Err, this, getDyldInfoBindOpcodes(), is64Bit(), | |||
4140 | MachOBindEntry::Kind::Regular); | |||
4141 | } | |||
4142 | ||||
4143 | iterator_range<bind_iterator> MachOObjectFile::lazyBindTable(Error &Err) { | |||
4144 | return bindTable(Err, this, getDyldInfoLazyBindOpcodes(), is64Bit(), | |||
4145 | MachOBindEntry::Kind::Lazy); | |||
4146 | } | |||
4147 | ||||
4148 | iterator_range<bind_iterator> MachOObjectFile::weakBindTable(Error &Err) { | |||
4149 | return bindTable(Err, this, getDyldInfoWeakBindOpcodes(), is64Bit(), | |||
| ||||
4150 | MachOBindEntry::Kind::Weak); | |||
4151 | } | |||
4152 | ||||
4153 | MachOObjectFile::load_command_iterator | |||
4154 | MachOObjectFile::begin_load_commands() const { | |||
4155 | return LoadCommands.begin(); | |||
4156 | } | |||
4157 | ||||
4158 | MachOObjectFile::load_command_iterator | |||
4159 | MachOObjectFile::end_load_commands() const { | |||
4160 | return LoadCommands.end(); | |||
4161 | } | |||
4162 | ||||
4163 | iterator_range<MachOObjectFile::load_command_iterator> | |||
4164 | MachOObjectFile::load_commands() const { | |||
4165 | return make_range(begin_load_commands(), end_load_commands()); | |||
4166 | } | |||
4167 | ||||
4168 | StringRef | |||
4169 | MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const { | |||
4170 | ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec); | |||
4171 | return parseSegmentOrSectionName(Raw.data()); | |||
4172 | } | |||
4173 | ||||
4174 | ArrayRef<char> | |||
4175 | MachOObjectFile::getSectionRawName(DataRefImpl Sec) const { | |||
4176 | assert(Sec.d.a < Sections.size() && "Should have detected this earlier")((void)0); | |||
4177 | const section_base *Base = | |||
4178 | reinterpret_cast<const section_base *>(Sections[Sec.d.a]); | |||
4179 | return makeArrayRef(Base->sectname); | |||
4180 | } | |||
4181 | ||||
4182 | ArrayRef<char> | |||
4183 | MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const { | |||
4184 | assert(Sec.d.a < Sections.size() && "Should have detected this earlier")((void)0); | |||
4185 | const section_base *Base = | |||
4186 | reinterpret_cast<const section_base *>(Sections[Sec.d.a]); | |||
4187 | return makeArrayRef(Base->segname); | |||
4188 | } | |||
4189 | ||||
4190 | bool | |||
4191 | MachOObjectFile::isRelocationScattered(const MachO::any_relocation_info &RE) | |||
4192 | const { | |||
4193 | if (getCPUType(*this) == MachO::CPU_TYPE_X86_64) | |||
4194 | return false; | |||
4195 | return getPlainRelocationAddress(RE) & MachO::R_SCATTERED; | |||
4196 | } | |||
4197 | ||||
4198 | unsigned MachOObjectFile::getPlainRelocationSymbolNum( | |||
4199 | const MachO::any_relocation_info &RE) const { | |||
4200 | if (isLittleEndian()) | |||
4201 | return RE.r_word1 & 0xffffff; | |||
4202 | return RE.r_word1 >> 8; | |||
4203 | } | |||
4204 | ||||
4205 | bool MachOObjectFile::getPlainRelocationExternal( | |||
4206 | const MachO::any_relocation_info &RE) const { | |||
4207 | if (isLittleEndian()) | |||
4208 | return (RE.r_word1 >> 27) & 1; | |||
4209 | return (RE.r_word1 >> 4) & 1; | |||
4210 | } | |||
4211 | ||||
4212 | bool MachOObjectFile::getScatteredRelocationScattered( | |||
4213 | const MachO::any_relocation_info &RE) const { | |||
4214 | return RE.r_word0 >> 31; | |||
4215 | } | |||
4216 | ||||
4217 | uint32_t MachOObjectFile::getScatteredRelocationValue( | |||
4218 | const MachO::any_relocation_info &RE) const { | |||
4219 | return RE.r_word1; | |||
4220 | } | |||
4221 | ||||
4222 | uint32_t MachOObjectFile::getScatteredRelocationType( | |||
4223 | const MachO::any_relocation_info &RE) const { | |||
4224 | return (RE.r_word0 >> 24) & 0xf; | |||
4225 | } | |||
4226 | ||||
4227 | unsigned MachOObjectFile::getAnyRelocationAddress( | |||
4228 | const MachO::any_relocation_info &RE) const { | |||
4229 | if (isRelocationScattered(RE)) | |||
4230 | return getScatteredRelocationAddress(RE); | |||
4231 | return getPlainRelocationAddress(RE); | |||
4232 | } | |||
4233 | ||||
4234 | unsigned MachOObjectFile::getAnyRelocationPCRel( | |||
4235 | const MachO::any_relocation_info &RE) const { | |||
4236 | if (isRelocationScattered(RE)) | |||
4237 | return getScatteredRelocationPCRel(RE); | |||
4238 | return getPlainRelocationPCRel(*this, RE); | |||
4239 | } | |||
4240 | ||||
4241 | unsigned MachOObjectFile::getAnyRelocationLength( | |||
4242 | const MachO::any_relocation_info &RE) const { | |||
4243 | if (isRelocationScattered(RE)) | |||
4244 | return getScatteredRelocationLength(RE); | |||
4245 | return getPlainRelocationLength(*this, RE); | |||
4246 | } | |||
4247 | ||||
4248 | unsigned | |||
4249 | MachOObjectFile::getAnyRelocationType( | |||
4250 | const MachO::any_relocation_info &RE) const { | |||
4251 | if (isRelocationScattered(RE)) | |||
4252 | return getScatteredRelocationType(RE); | |||
4253 | return getPlainRelocationType(*this, RE); | |||
4254 | } | |||
4255 | ||||
4256 | SectionRef | |||
4257 | MachOObjectFile::getAnyRelocationSection( | |||
4258 | const MachO::any_relocation_info &RE) const { | |||
4259 | if (isRelocationScattered(RE) || getPlainRelocationExternal(RE)) | |||
4260 | return *section_end(); | |||
4261 | unsigned SecNum = getPlainRelocationSymbolNum(RE); | |||
4262 | if (SecNum == MachO::R_ABS || SecNum > Sections.size()) | |||
4263 | return *section_end(); | |||
4264 | DataRefImpl DRI; | |||
4265 | DRI.d.a = SecNum - 1; | |||
4266 | return SectionRef(DRI, this); | |||
4267 | } | |||
4268 | ||||
4269 | MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const { | |||
4270 | assert(DRI.d.a < Sections.size() && "Should have detected this earlier")((void)0); | |||
4271 | return getStruct<MachO::section>(*this, Sections[DRI.d.a]); | |||
4272 | } | |||
4273 | ||||
4274 | MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const { | |||
4275 | assert(DRI.d.a < Sections.size() && "Should have detected this earlier")((void)0); | |||
4276 | return getStruct<MachO::section_64>(*this, Sections[DRI.d.a]); | |||
4277 | } | |||
4278 | ||||
4279 | MachO::section MachOObjectFile::getSection(const LoadCommandInfo &L, | |||
4280 | unsigned Index) const { | |||
4281 | const char *Sec = getSectionPtr(*this, L, Index); | |||
4282 | return getStruct<MachO::section>(*this, Sec); | |||
4283 | } | |||
4284 | ||||
4285 | MachO::section_64 MachOObjectFile::getSection64(const LoadCommandInfo &L, | |||
4286 | unsigned Index) const { | |||
4287 | const char *Sec = getSectionPtr(*this, L, Index); | |||
4288 | return getStruct<MachO::section_64>(*this, Sec); | |||
4289 | } | |||
4290 | ||||
4291 | MachO::nlist | |||
4292 | MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI) const { | |||
4293 | const char *P = reinterpret_cast<const char *>(DRI.p); | |||
4294 | return getStruct<MachO::nlist>(*this, P); | |||
4295 | } | |||
4296 | ||||
4297 | MachO::nlist_64 | |||
4298 | MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI) const { | |||
4299 | const char *P = reinterpret_cast<const char *>(DRI.p); | |||
4300 | return getStruct<MachO::nlist_64>(*this, P); | |||
4301 | } | |||
4302 | ||||
4303 | MachO::linkedit_data_command | |||
4304 | MachOObjectFile::getLinkeditDataLoadCommand(const LoadCommandInfo &L) const { | |||
4305 | return getStruct<MachO::linkedit_data_command>(*this, L.Ptr); | |||
4306 | } | |||
4307 | ||||
4308 | MachO::segment_command | |||
4309 | MachOObjectFile::getSegmentLoadCommand(const LoadCommandInfo &L) const { | |||
4310 | return getStruct<MachO::segment_command>(*this, L.Ptr); | |||
4311 | } | |||
4312 | ||||
4313 | MachO::segment_command_64 | |||
4314 | MachOObjectFile::getSegment64LoadCommand(const LoadCommandInfo &L) const { | |||
4315 | return getStruct<MachO::segment_command_64>(*this, L.Ptr); | |||
4316 | } | |||
4317 | ||||
4318 | MachO::linker_option_command | |||
4319 | MachOObjectFile::getLinkerOptionLoadCommand(const LoadCommandInfo &L) const { | |||
4320 | return getStruct<MachO::linker_option_command>(*this, L.Ptr); | |||
4321 | } | |||
4322 | ||||
4323 | MachO::version_min_command | |||
4324 | MachOObjectFile::getVersionMinLoadCommand(const LoadCommandInfo &L) const { | |||
4325 | return getStruct<MachO::version_min_command>(*this, L.Ptr); | |||
4326 | } | |||
4327 | ||||
4328 | MachO::note_command | |||
4329 | MachOObjectFile::getNoteLoadCommand(const LoadCommandInfo &L) const { | |||
4330 | return getStruct<MachO::note_command>(*this, L.Ptr); | |||
4331 | } | |||
4332 | ||||
4333 | MachO::build_version_command | |||
4334 | MachOObjectFile::getBuildVersionLoadCommand(const LoadCommandInfo &L) const { | |||
4335 | return getStruct<MachO::build_version_command>(*this, L.Ptr); | |||
4336 | } | |||
4337 | ||||
4338 | MachO::build_tool_version | |||
4339 | MachOObjectFile::getBuildToolVersion(unsigned index) const { | |||
4340 | return getStruct<MachO::build_tool_version>(*this, BuildTools[index]); | |||
4341 | } | |||
4342 | ||||
4343 | MachO::dylib_command | |||
4344 | MachOObjectFile::getDylibIDLoadCommand(const LoadCommandInfo &L) const { | |||
4345 | return getStruct<MachO::dylib_command>(*this, L.Ptr); | |||
4346 | } | |||
4347 | ||||
4348 | MachO::dyld_info_command | |||
4349 | MachOObjectFile::getDyldInfoLoadCommand(const LoadCommandInfo &L) const { | |||
4350 | return getStruct<MachO::dyld_info_command>(*this, L.Ptr); | |||
4351 | } | |||
4352 | ||||
4353 | MachO::dylinker_command | |||
4354 | MachOObjectFile::getDylinkerCommand(const LoadCommandInfo &L) const { | |||
4355 | return getStruct<MachO::dylinker_command>(*this, L.Ptr); | |||
4356 | } | |||
4357 | ||||
4358 | MachO::uuid_command | |||
4359 | MachOObjectFile::getUuidCommand(const LoadCommandInfo &L) const { | |||
4360 | return getStruct<MachO::uuid_command>(*this, L.Ptr); | |||
4361 | } | |||
4362 | ||||
4363 | MachO::rpath_command | |||
4364 | MachOObjectFile::getRpathCommand(const LoadCommandInfo &L) const { | |||
4365 | return getStruct<MachO::rpath_command>(*this, L.Ptr); | |||
4366 | } | |||
4367 | ||||
4368 | MachO::source_version_command | |||
4369 | MachOObjectFile::getSourceVersionCommand(const LoadCommandInfo &L) const { | |||
4370 | return getStruct<MachO::source_version_command>(*this, L.Ptr); | |||
4371 | } | |||
4372 | ||||
4373 | MachO::entry_point_command | |||
4374 | MachOObjectFile::getEntryPointCommand(const LoadCommandInfo &L) const { | |||
4375 | return getStruct<MachO::entry_point_command>(*this, L.Ptr); | |||
4376 | } | |||
4377 | ||||
4378 | MachO::encryption_info_command | |||
4379 | MachOObjectFile::getEncryptionInfoCommand(const LoadCommandInfo &L) const { | |||
4380 | return getStruct<MachO::encryption_info_command>(*this, L.Ptr); | |||
4381 | } | |||
4382 | ||||
4383 | MachO::encryption_info_command_64 | |||
4384 | MachOObjectFile::getEncryptionInfoCommand64(const LoadCommandInfo &L) const { | |||
4385 | return getStruct<MachO::encryption_info_command_64>(*this, L.Ptr); | |||
4386 | } | |||
4387 | ||||
4388 | MachO::sub_framework_command | |||
4389 | MachOObjectFile::getSubFrameworkCommand(const LoadCommandInfo &L) const { | |||
4390 | return getStruct<MachO::sub_framework_command>(*this, L.Ptr); | |||
4391 | } | |||
4392 | ||||
4393 | MachO::sub_umbrella_command | |||
4394 | MachOObjectFile::getSubUmbrellaCommand(const LoadCommandInfo &L) const { | |||
4395 | return getStruct<MachO::sub_umbrella_command>(*this, L.Ptr); | |||
4396 | } | |||
4397 | ||||
4398 | MachO::sub_library_command | |||
4399 | MachOObjectFile::getSubLibraryCommand(const LoadCommandInfo &L) const { | |||
4400 | return getStruct<MachO::sub_library_command>(*this, L.Ptr); | |||
4401 | } | |||
4402 | ||||
4403 | MachO::sub_client_command | |||
4404 | MachOObjectFile::getSubClientCommand(const LoadCommandInfo &L) const { | |||
4405 | return getStruct<MachO::sub_client_command>(*this, L.Ptr); | |||
4406 | } | |||
4407 | ||||
4408 | MachO::routines_command | |||
4409 | MachOObjectFile::getRoutinesCommand(const LoadCommandInfo &L) const { | |||
4410 | return getStruct<MachO::routines_command>(*this, L.Ptr); | |||
4411 | } | |||
4412 | ||||
4413 | MachO::routines_command_64 | |||
4414 | MachOObjectFile::getRoutinesCommand64(const LoadCommandInfo &L) const { | |||
4415 | return getStruct<MachO::routines_command_64>(*this, L.Ptr); | |||
4416 | } | |||
4417 | ||||
4418 | MachO::thread_command | |||
4419 | MachOObjectFile::getThreadCommand(const LoadCommandInfo &L) const { | |||
4420 | return getStruct<MachO::thread_command>(*this, L.Ptr); | |||
4421 | } | |||
4422 | ||||
4423 | MachO::any_relocation_info | |||
4424 | MachOObjectFile::getRelocation(DataRefImpl Rel) const { | |||
4425 | uint32_t Offset; | |||
4426 | if (getHeader().filetype == MachO::MH_OBJECT) { | |||
4427 | DataRefImpl Sec; | |||
4428 | Sec.d.a = Rel.d.a; | |||
4429 | if (is64Bit()) { | |||
4430 | MachO::section_64 Sect = getSection64(Sec); | |||
4431 | Offset = Sect.reloff; | |||
4432 | } else { | |||
4433 | MachO::section Sect = getSection(Sec); | |||
4434 | Offset = Sect.reloff; | |||
4435 | } | |||
4436 | } else { | |||
4437 | MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand(); | |||
4438 | if (Rel.d.a == 0) | |||
4439 | Offset = DysymtabLoadCmd.extreloff; // Offset to the external relocations | |||
4440 | else | |||
4441 | Offset = DysymtabLoadCmd.locreloff; // Offset to the local relocations | |||
4442 | } | |||
4443 | ||||
4444 | auto P = reinterpret_cast<const MachO::any_relocation_info *>( | |||
4445 | getPtr(*this, Offset)) + Rel.d.b; | |||
4446 | return getStruct<MachO::any_relocation_info>( | |||
4447 | *this, reinterpret_cast<const char *>(P)); | |||
4448 | } | |||
4449 | ||||
4450 | MachO::data_in_code_entry | |||
4451 | MachOObjectFile::getDice(DataRefImpl Rel) const { | |||
4452 | const char *P = reinterpret_cast<const char *>(Rel.p); | |||
4453 | return getStruct<MachO::data_in_code_entry>(*this, P); | |||
4454 | } | |||
4455 | ||||
4456 | const MachO::mach_header &MachOObjectFile::getHeader() const { | |||
4457 | return Header; | |||
4458 | } | |||
4459 | ||||
4460 | const MachO::mach_header_64 &MachOObjectFile::getHeader64() const { | |||
4461 | assert(is64Bit())((void)0); | |||
4462 | return Header64; | |||
4463 | } | |||
4464 | ||||
4465 | uint32_t MachOObjectFile::getIndirectSymbolTableEntry( | |||
4466 | const MachO::dysymtab_command &DLC, | |||
4467 | unsigned Index) const { | |||
4468 | uint64_t Offset = DLC.indirectsymoff + Index * sizeof(uint32_t); | |||
4469 | return getStruct<uint32_t>(*this, getPtr(*this, Offset)); | |||
4470 | } | |||
4471 | ||||
4472 | MachO::data_in_code_entry | |||
4473 | MachOObjectFile::getDataInCodeTableEntry(uint32_t DataOffset, | |||
4474 | unsigned Index) const { | |||
4475 | uint64_t Offset = DataOffset + Index * sizeof(MachO::data_in_code_entry); | |||
4476 | return getStruct<MachO::data_in_code_entry>(*this, getPtr(*this, Offset)); | |||
4477 | } | |||
4478 | ||||
4479 | MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const { | |||
4480 | if (SymtabLoadCmd) | |||
4481 | return getStruct<MachO::symtab_command>(*this, SymtabLoadCmd); | |||
4482 | ||||
4483 | // If there is no SymtabLoadCmd return a load command with zero'ed fields. | |||
4484 | MachO::symtab_command Cmd; | |||
4485 | Cmd.cmd = MachO::LC_SYMTAB; | |||
4486 | Cmd.cmdsize = sizeof(MachO::symtab_command); | |||
4487 | Cmd.symoff = 0; | |||
4488 | Cmd.nsyms = 0; | |||
4489 | Cmd.stroff = 0; | |||
4490 | Cmd.strsize = 0; | |||
4491 | return Cmd; | |||
4492 | } | |||
4493 | ||||
4494 | MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const { | |||
4495 | if (DysymtabLoadCmd) | |||
4496 | return getStruct<MachO::dysymtab_command>(*this, DysymtabLoadCmd); | |||
4497 | ||||
4498 | // If there is no DysymtabLoadCmd return a load command with zero'ed fields. | |||
4499 | MachO::dysymtab_command Cmd; | |||
4500 | Cmd.cmd = MachO::LC_DYSYMTAB; | |||
4501 | Cmd.cmdsize = sizeof(MachO::dysymtab_command); | |||
4502 | Cmd.ilocalsym = 0; | |||
4503 | Cmd.nlocalsym = 0; | |||
4504 | Cmd.iextdefsym = 0; | |||
4505 | Cmd.nextdefsym = 0; | |||
4506 | Cmd.iundefsym = 0; | |||
4507 | Cmd.nundefsym = 0; | |||
4508 | Cmd.tocoff = 0; | |||
4509 | Cmd.ntoc = 0; | |||
4510 | Cmd.modtaboff = 0; | |||
4511 | Cmd.nmodtab = 0; | |||
4512 | Cmd.extrefsymoff = 0; | |||
4513 | Cmd.nextrefsyms = 0; | |||
4514 | Cmd.indirectsymoff = 0; | |||
4515 | Cmd.nindirectsyms = 0; | |||
4516 | Cmd.extreloff = 0; | |||
4517 | Cmd.nextrel = 0; | |||
4518 | Cmd.locreloff = 0; | |||
4519 | Cmd.nlocrel = 0; | |||
4520 | return Cmd; | |||
4521 | } | |||
4522 | ||||
4523 | MachO::linkedit_data_command | |||
4524 | MachOObjectFile::getDataInCodeLoadCommand() const { | |||
4525 | if (DataInCodeLoadCmd) | |||
4526 | return getStruct<MachO::linkedit_data_command>(*this, DataInCodeLoadCmd); | |||
4527 | ||||
4528 | // If there is no DataInCodeLoadCmd return a load command with zero'ed fields. | |||
4529 | MachO::linkedit_data_command Cmd; | |||
4530 | Cmd.cmd = MachO::LC_DATA_IN_CODE; | |||
4531 | Cmd.cmdsize = sizeof(MachO::linkedit_data_command); | |||
4532 | Cmd.dataoff = 0; | |||
4533 | Cmd.datasize = 0; | |||
4534 | return Cmd; | |||
4535 | } | |||
4536 | ||||
4537 | MachO::linkedit_data_command | |||
4538 | MachOObjectFile::getLinkOptHintsLoadCommand() const { | |||
4539 | if (LinkOptHintsLoadCmd) | |||
4540 | return getStruct<MachO::linkedit_data_command>(*this, LinkOptHintsLoadCmd); | |||
4541 | ||||
4542 | // If there is no LinkOptHintsLoadCmd return a load command with zero'ed | |||
4543 | // fields. | |||
4544 | MachO::linkedit_data_command Cmd; | |||
4545 | Cmd.cmd = MachO::LC_LINKER_OPTIMIZATION_HINT; | |||
4546 | Cmd.cmdsize = sizeof(MachO::linkedit_data_command); | |||
4547 | Cmd.dataoff = 0; | |||
4548 | Cmd.datasize = 0; | |||
4549 | return Cmd; | |||
4550 | } | |||
4551 | ||||
4552 | ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const { | |||
4553 | if (!DyldInfoLoadCmd) | |||
4554 | return None; | |||
4555 | ||||
4556 | auto DyldInfoOrErr = | |||
4557 | getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd); | |||
4558 | if (!DyldInfoOrErr) | |||
4559 | return None; | |||
4560 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
4561 | const uint8_t *Ptr = | |||
4562 | reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.rebase_off)); | |||
4563 | return makeArrayRef(Ptr, DyldInfo.rebase_size); | |||
4564 | } | |||
4565 | ||||
4566 | ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const { | |||
4567 | if (!DyldInfoLoadCmd) | |||
4568 | return None; | |||
4569 | ||||
4570 | auto DyldInfoOrErr = | |||
4571 | getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd); | |||
4572 | if (!DyldInfoOrErr) | |||
4573 | return None; | |||
4574 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
4575 | const uint8_t *Ptr = | |||
4576 | reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.bind_off)); | |||
4577 | return makeArrayRef(Ptr, DyldInfo.bind_size); | |||
4578 | } | |||
4579 | ||||
4580 | ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const { | |||
4581 | if (!DyldInfoLoadCmd) | |||
4582 | return None; | |||
4583 | ||||
4584 | auto DyldInfoOrErr = | |||
4585 | getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd); | |||
4586 | if (!DyldInfoOrErr) | |||
4587 | return None; | |||
4588 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
4589 | const uint8_t *Ptr = | |||
4590 | reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.weak_bind_off)); | |||
4591 | return makeArrayRef(Ptr, DyldInfo.weak_bind_size); | |||
4592 | } | |||
4593 | ||||
4594 | ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const { | |||
4595 | if (!DyldInfoLoadCmd) | |||
4596 | return None; | |||
4597 | ||||
4598 | auto DyldInfoOrErr = | |||
4599 | getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd); | |||
4600 | if (!DyldInfoOrErr) | |||
4601 | return None; | |||
4602 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
4603 | const uint8_t *Ptr = | |||
4604 | reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.lazy_bind_off)); | |||
4605 | return makeArrayRef(Ptr, DyldInfo.lazy_bind_size); | |||
4606 | } | |||
4607 | ||||
4608 | ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const { | |||
4609 | if (!DyldInfoLoadCmd) | |||
4610 | return None; | |||
4611 | ||||
4612 | auto DyldInfoOrErr = | |||
4613 | getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd); | |||
4614 | if (!DyldInfoOrErr) | |||
4615 | return None; | |||
4616 | MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get(); | |||
4617 | const uint8_t *Ptr = | |||
4618 | reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.export_off)); | |||
4619 | return makeArrayRef(Ptr, DyldInfo.export_size); | |||
4620 | } | |||
4621 | ||||
4622 | ArrayRef<uint8_t> MachOObjectFile::getUuid() const { | |||
4623 | if (!UuidLoadCmd) | |||
4624 | return None; | |||
4625 | // Returning a pointer is fine as uuid doesn't need endian swapping. | |||
4626 | const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid)__builtin_offsetof(MachO::uuid_command, uuid); | |||
4627 | return makeArrayRef(reinterpret_cast<const uint8_t *>(Ptr), 16); | |||
4628 | } | |||
4629 | ||||
4630 | StringRef MachOObjectFile::getStringTableData() const { | |||
4631 | MachO::symtab_command S = getSymtabLoadCommand(); | |||
4632 | return getData().substr(S.stroff, S.strsize); | |||
4633 | } | |||
4634 | ||||
4635 | bool MachOObjectFile::is64Bit() const { | |||
4636 | return getType() == getMachOType(false, true) || | |||
4637 | getType() == getMachOType(true, true); | |||
4638 | } | |||
4639 | ||||
4640 | void MachOObjectFile::ReadULEB128s(uint64_t Index, | |||
4641 | SmallVectorImpl<uint64_t> &Out) const { | |||
4642 | DataExtractor extractor(ObjectFile::getData(), true, 0); | |||
4643 | ||||
4644 | uint64_t offset = Index; | |||
4645 | uint64_t data = 0; | |||
4646 | while (uint64_t delta = extractor.getULEB128(&offset)) { | |||
4647 | data += delta; | |||
4648 | Out.push_back(data); | |||
4649 | } | |||
4650 | } | |||
4651 | ||||
4652 | bool MachOObjectFile::isRelocatableObject() const { | |||
4653 | return getHeader().filetype == MachO::MH_OBJECT; | |||
4654 | } | |||
4655 | ||||
4656 | Expected<std::unique_ptr<MachOObjectFile>> | |||
4657 | ObjectFile::createMachOObjectFile(MemoryBufferRef Buffer, | |||
4658 | uint32_t UniversalCputype, | |||
4659 | uint32_t UniversalIndex) { | |||
4660 | StringRef Magic = Buffer.getBuffer().slice(0, 4); | |||
4661 | if (Magic == "\xFE\xED\xFA\xCE") | |||
4662 | return MachOObjectFile::create(Buffer, false, false, | |||
4663 | UniversalCputype, UniversalIndex); | |||
4664 | if (Magic == "\xCE\xFA\xED\xFE") | |||
4665 | return MachOObjectFile::create(Buffer, true, false, | |||
4666 | UniversalCputype, UniversalIndex); | |||
4667 | if (Magic == "\xFE\xED\xFA\xCF") | |||
4668 | return MachOObjectFile::create(Buffer, false, true, | |||
4669 | UniversalCputype, UniversalIndex); | |||
4670 | if (Magic == "\xCF\xFA\xED\xFE") | |||
4671 | return MachOObjectFile::create(Buffer, true, true, | |||
4672 | UniversalCputype, UniversalIndex); | |||
4673 | return make_error<GenericBinaryError>("Unrecognized MachO magic number", | |||
4674 | object_error::invalid_file_type); | |||
4675 | } | |||
4676 | ||||
4677 | StringRef MachOObjectFile::mapDebugSectionName(StringRef Name) const { | |||
4678 | return StringSwitch<StringRef>(Name) | |||
4679 | .Case("debug_str_offs", "debug_str_offsets") | |||
4680 | .Default(Name); | |||
4681 | } |
1 | // -*- C++ -*- |
2 | //===----------------------------------------------------------------------===// |
3 | // |
4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | // See https://llvm.org/LICENSE.txt for license information. |
6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | #ifndef _LIBCPP___MEMORY_UNIQUE_PTR_H |
11 | #define _LIBCPP___MEMORY_UNIQUE_PTR_H |
12 | |
13 | #include <__config> |
14 | #include <__functional_base> |
15 | #include <__functional/hash.h> |
16 | #include <__functional/operations.h> |
17 | #include <__memory/allocator_traits.h> // __pointer |
18 | #include <__memory/compressed_pair.h> |
19 | #include <__utility/forward.h> |
20 | #include <cstddef> |
21 | #include <type_traits> |
22 | #include <utility> |
23 | |
24 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
25 | # include <__memory/auto_ptr.h> |
26 | #endif |
27 | |
28 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
29 | #pragma GCC system_header |
30 | #endif |
31 | |
32 | _LIBCPP_PUSH_MACROSpush_macro("min") push_macro("max") |
33 | #include <__undef_macros> |
34 | |
35 | _LIBCPP_BEGIN_NAMESPACE_STDnamespace std { inline namespace __1 { |
36 | |
37 | template <class _Tp> |
38 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) default_delete { |
39 | static_assert(!is_function<_Tp>::value, |
40 | "default_delete cannot be instantiated for function types"); |
41 | #ifndef _LIBCPP_CXX03_LANG |
42 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) constexpr default_delete() _NOEXCEPTnoexcept = default; |
43 | #else |
44 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) default_delete() {} |
45 | #endif |
46 | template <class _Up> |
47 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
48 | default_delete(const default_delete<_Up>&, |
49 | typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = |
50 | 0) _NOEXCEPTnoexcept {} |
51 | |
52 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) void operator()(_Tp* __ptr) const _NOEXCEPTnoexcept { |
53 | static_assert(sizeof(_Tp) > 0, |
54 | "default_delete can not delete incomplete type"); |
55 | static_assert(!is_void<_Tp>::value, |
56 | "default_delete can not delete incomplete type"); |
57 | delete __ptr; |
58 | } |
59 | }; |
60 | |
61 | template <class _Tp> |
62 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) default_delete<_Tp[]> { |
63 | private: |
64 | template <class _Up> |
65 | struct _EnableIfConvertible |
66 | : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; |
67 | |
68 | public: |
69 | #ifndef _LIBCPP_CXX03_LANG |
70 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) constexpr default_delete() _NOEXCEPTnoexcept = default; |
71 | #else |
72 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) default_delete() {} |
73 | #endif |
74 | |
75 | template <class _Up> |
76 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
77 | default_delete(const default_delete<_Up[]>&, |
78 | typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPTnoexcept {} |
79 | |
80 | template <class _Up> |
81 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
82 | typename _EnableIfConvertible<_Up>::type |
83 | operator()(_Up* __ptr) const _NOEXCEPTnoexcept { |
84 | static_assert(sizeof(_Tp) > 0, |
85 | "default_delete can not delete incomplete type"); |
86 | static_assert(!is_void<_Tp>::value, |
87 | "default_delete can not delete void type"); |
88 | delete[] __ptr; |
89 | } |
90 | }; |
91 | |
92 | template <class _Deleter> |
93 | struct __unique_ptr_deleter_sfinae { |
94 | static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); |
95 | typedef const _Deleter& __lval_ref_type; |
96 | typedef _Deleter&& __good_rval_ref_type; |
97 | typedef true_type __enable_rval_overload; |
98 | }; |
99 | |
100 | template <class _Deleter> |
101 | struct __unique_ptr_deleter_sfinae<_Deleter const&> { |
102 | typedef const _Deleter& __lval_ref_type; |
103 | typedef const _Deleter&& __bad_rval_ref_type; |
104 | typedef false_type __enable_rval_overload; |
105 | }; |
106 | |
107 | template <class _Deleter> |
108 | struct __unique_ptr_deleter_sfinae<_Deleter&> { |
109 | typedef _Deleter& __lval_ref_type; |
110 | typedef _Deleter&& __bad_rval_ref_type; |
111 | typedef false_type __enable_rval_overload; |
112 | }; |
113 | |
114 | #if defined(_LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI) |
115 | # define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) |
116 | #else |
117 | # define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI |
118 | #endif |
119 | |
120 | template <class _Tp, class _Dp = default_delete<_Tp> > |
121 | class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) unique_ptr { |
122 | public: |
123 | typedef _Tp element_type; |
124 | typedef _Dp deleter_type; |
125 | typedef _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) typename __pointer<_Tp, deleter_type>::type pointer; |
126 | |
127 | static_assert(!is_rvalue_reference<deleter_type>::value, |
128 | "the specified deleter type cannot be an rvalue reference"); |
129 | |
130 | private: |
131 | __compressed_pair<pointer, deleter_type> __ptr_; |
132 | |
133 | struct __nat { int __for_bool_; }; |
134 | |
135 | typedef _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; |
136 | |
137 | template <bool _Dummy> |
138 | using _LValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
139 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; |
140 | |
141 | template <bool _Dummy> |
142 | using _GoodRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
143 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; |
144 | |
145 | template <bool _Dummy> |
146 | using _BadRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
147 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; |
148 | |
149 | template <bool _Dummy, class _Deleter = typename __dependent_type< |
150 | __identity<deleter_type>, _Dummy>::type> |
151 | using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
152 | typename enable_if<is_default_constructible<_Deleter>::value && |
153 | !is_pointer<_Deleter>::value>::type; |
154 | |
155 | template <class _ArgType> |
156 | using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
157 | typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; |
158 | |
159 | template <class _UPtr, class _Up> |
160 | using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
161 | is_convertible<typename _UPtr::pointer, pointer>::value && |
162 | !is_array<_Up>::value |
163 | >::type; |
164 | |
165 | template <class _UDel> |
166 | using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
167 | (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || |
168 | (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) |
169 | >::type; |
170 | |
171 | template <class _UDel> |
172 | using _EnableIfDeleterAssignable = typename enable_if< |
173 | is_assignable<_Dp&, _UDel&&>::value |
174 | >::type; |
175 | |
176 | public: |
177 | template <bool _Dummy = true, |
178 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
179 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
180 | _LIBCPP_CONSTEXPRconstexpr unique_ptr() _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
181 | |
182 | template <bool _Dummy = true, |
183 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
184 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
185 | _LIBCPP_CONSTEXPRconstexpr unique_ptr(nullptr_t) _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
186 | |
187 | template <bool _Dummy = true, |
188 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
189 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
190 | explicit unique_ptr(pointer __p) _NOEXCEPTnoexcept : __ptr_(__p, __default_init_tag()) {} |
191 | |
192 | template <bool _Dummy = true, |
193 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > |
194 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
195 | unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
196 | : __ptr_(__p, __d) {} |
197 | |
198 | template <bool _Dummy = true, |
199 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > |
200 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
201 | unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
202 | : __ptr_(__p, _VSTDstd::__1::move(__d)) { |
203 | static_assert(!is_reference<deleter_type>::value, |
204 | "rvalue deleter bound to reference"); |
205 | } |
206 | |
207 | template <bool _Dummy = true, |
208 | class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > |
209 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
210 | unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; |
211 | |
212 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
213 | unique_ptr(unique_ptr&& __u) _NOEXCEPTnoexcept |
214 | : __ptr_(__u.release(), _VSTDstd::__1::forward<deleter_type>(__u.get_deleter())) { |
215 | } |
216 | |
217 | template <class _Up, class _Ep, |
218 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
219 | class = _EnableIfDeleterConvertible<_Ep> |
220 | > |
221 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
222 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept |
223 | : __ptr_(__u.release(), _VSTDstd::__1::forward<_Ep>(__u.get_deleter())) {} |
224 | |
225 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
226 | template <class _Up> |
227 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
228 | unique_ptr(auto_ptr<_Up>&& __p, |
229 | typename enable_if<is_convertible<_Up*, _Tp*>::value && |
230 | is_same<_Dp, default_delete<_Tp> >::value, |
231 | __nat>::type = __nat()) _NOEXCEPTnoexcept |
232 | : __ptr_(__p.release(), __default_init_tag()) {} |
233 | #endif |
234 | |
235 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
236 | unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPTnoexcept { |
237 | reset(__u.release()); |
238 | __ptr_.second() = _VSTDstd::__1::forward<deleter_type>(__u.get_deleter()); |
239 | return *this; |
240 | } |
241 | |
242 | template <class _Up, class _Ep, |
243 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
244 | class = _EnableIfDeleterAssignable<_Ep> |
245 | > |
246 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
247 | unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept { |
248 | reset(__u.release()); |
249 | __ptr_.second() = _VSTDstd::__1::forward<_Ep>(__u.get_deleter()); |
250 | return *this; |
251 | } |
252 | |
253 | #if _LIBCPP_STD_VER14 <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) |
254 | template <class _Up> |
255 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
256 | typename enable_if<is_convertible<_Up*, _Tp*>::value && |
257 | is_same<_Dp, default_delete<_Tp> >::value, |
258 | unique_ptr&>::type |
259 | operator=(auto_ptr<_Up> __p) { |
260 | reset(__p.release()); |
261 | return *this; |
262 | } |
263 | #endif |
264 | |
265 | #ifdef _LIBCPP_CXX03_LANG |
266 | unique_ptr(unique_ptr const&) = delete; |
267 | unique_ptr& operator=(unique_ptr const&) = delete; |
268 | #endif |
269 | |
270 | |
271 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
272 | ~unique_ptr() { reset(); } |
273 | |
274 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
275 | unique_ptr& operator=(nullptr_t) _NOEXCEPTnoexcept { |
276 | reset(); |
277 | return *this; |
278 | } |
279 | |
280 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
281 | typename add_lvalue_reference<_Tp>::type |
282 | operator*() const { |
283 | return *__ptr_.first(); |
284 | } |
285 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
286 | pointer operator->() const _NOEXCEPTnoexcept { |
287 | return __ptr_.first(); |
288 | } |
289 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
290 | pointer get() const _NOEXCEPTnoexcept { |
291 | return __ptr_.first(); |
292 | } |
293 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
294 | deleter_type& get_deleter() _NOEXCEPTnoexcept { |
295 | return __ptr_.second(); |
296 | } |
297 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
298 | const deleter_type& get_deleter() const _NOEXCEPTnoexcept { |
299 | return __ptr_.second(); |
300 | } |
301 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
302 | explicit operator bool() const _NOEXCEPTnoexcept { |
303 | return __ptr_.first() != nullptr; |
304 | } |
305 | |
306 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
307 | pointer release() _NOEXCEPTnoexcept { |
308 | pointer __t = __ptr_.first(); |
309 | __ptr_.first() = pointer(); |
310 | return __t; |
311 | } |
312 | |
313 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
314 | void reset(pointer __p = pointer()) _NOEXCEPTnoexcept { |
315 | pointer __tmp = __ptr_.first(); |
316 | __ptr_.first() = __p; |
317 | if (__tmp) |
318 | __ptr_.second()(__tmp); |
319 | } |
320 | |
321 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
322 | void swap(unique_ptr& __u) _NOEXCEPTnoexcept { |
323 | __ptr_.swap(__u.__ptr_); |
324 | } |
325 | }; |
326 | |
327 | |
328 | template <class _Tp, class _Dp> |
329 | class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) unique_ptr<_Tp[], _Dp> { |
330 | public: |
331 | typedef _Tp element_type; |
332 | typedef _Dp deleter_type; |
333 | typedef typename __pointer<_Tp, deleter_type>::type pointer; |
334 | |
335 | private: |
336 | __compressed_pair<pointer, deleter_type> __ptr_; |
337 | |
338 | template <class _From> |
339 | struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; |
340 | |
341 | template <class _FromElem> |
342 | struct _CheckArrayPointerConversion<_FromElem*> |
343 | : integral_constant<bool, |
344 | is_same<_FromElem*, pointer>::value || |
345 | (is_same<pointer, element_type*>::value && |
346 | is_convertible<_FromElem(*)[], element_type(*)[]>::value) |
347 | > |
348 | {}; |
349 | |
350 | typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; |
351 | |
352 | template <bool _Dummy> |
353 | using _LValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
354 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; |
355 | |
356 | template <bool _Dummy> |
357 | using _GoodRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
358 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; |
359 | |
360 | template <bool _Dummy> |
361 | using _BadRValRefType _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
362 | typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; |
363 | |
364 | template <bool _Dummy, class _Deleter = typename __dependent_type< |
365 | __identity<deleter_type>, _Dummy>::type> |
366 | using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
367 | typename enable_if<is_default_constructible<_Deleter>::value && |
368 | !is_pointer<_Deleter>::value>::type; |
369 | |
370 | template <class _ArgType> |
371 | using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = |
372 | typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; |
373 | |
374 | template <class _Pp> |
375 | using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
376 | _CheckArrayPointerConversion<_Pp>::value |
377 | >::type; |
378 | |
379 | template <class _UPtr, class _Up, |
380 | class _ElemT = typename _UPtr::element_type> |
381 | using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
382 | is_array<_Up>::value && |
383 | is_same<pointer, element_type*>::value && |
384 | is_same<typename _UPtr::pointer, _ElemT*>::value && |
385 | is_convertible<_ElemT(*)[], element_type(*)[]>::value |
386 | >::type; |
387 | |
388 | template <class _UDel> |
389 | using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
390 | (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || |
391 | (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) |
392 | >::type; |
393 | |
394 | template <class _UDel> |
395 | using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE__attribute__((nodebug)) = typename enable_if< |
396 | is_assignable<_Dp&, _UDel&&>::value |
397 | >::type; |
398 | |
399 | public: |
400 | template <bool _Dummy = true, |
401 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
402 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
403 | _LIBCPP_CONSTEXPRconstexpr unique_ptr() _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
404 | |
405 | template <bool _Dummy = true, |
406 | class = _EnableIfDeleterDefaultConstructible<_Dummy> > |
407 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
408 | _LIBCPP_CONSTEXPRconstexpr unique_ptr(nullptr_t) _NOEXCEPTnoexcept : __ptr_(pointer(), __default_init_tag()) {} |
409 | |
410 | template <class _Pp, bool _Dummy = true, |
411 | class = _EnableIfDeleterDefaultConstructible<_Dummy>, |
412 | class = _EnableIfPointerConvertible<_Pp> > |
413 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
414 | explicit unique_ptr(_Pp __p) _NOEXCEPTnoexcept |
415 | : __ptr_(__p, __default_init_tag()) {} |
416 | |
417 | template <class _Pp, bool _Dummy = true, |
418 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, |
419 | class = _EnableIfPointerConvertible<_Pp> > |
420 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
421 | unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
422 | : __ptr_(__p, __d) {} |
423 | |
424 | template <bool _Dummy = true, |
425 | class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > |
426 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
427 | unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
428 | : __ptr_(nullptr, __d) {} |
429 | |
430 | template <class _Pp, bool _Dummy = true, |
431 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, |
432 | class = _EnableIfPointerConvertible<_Pp> > |
433 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
434 | unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
435 | : __ptr_(__p, _VSTDstd::__1::move(__d)) { |
436 | static_assert(!is_reference<deleter_type>::value, |
437 | "rvalue deleter bound to reference"); |
438 | } |
439 | |
440 | template <bool _Dummy = true, |
441 | class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > |
442 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
443 | unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPTnoexcept |
444 | : __ptr_(nullptr, _VSTDstd::__1::move(__d)) { |
445 | static_assert(!is_reference<deleter_type>::value, |
446 | "rvalue deleter bound to reference"); |
447 | } |
448 | |
449 | template <class _Pp, bool _Dummy = true, |
450 | class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, |
451 | class = _EnableIfPointerConvertible<_Pp> > |
452 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
453 | unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; |
454 | |
455 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
456 | unique_ptr(unique_ptr&& __u) _NOEXCEPTnoexcept |
457 | : __ptr_(__u.release(), _VSTDstd::__1::forward<deleter_type>(__u.get_deleter())) { |
458 | } |
459 | |
460 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
461 | unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPTnoexcept { |
462 | reset(__u.release()); |
463 | __ptr_.second() = _VSTDstd::__1::forward<deleter_type>(__u.get_deleter()); |
464 | return *this; |
465 | } |
466 | |
467 | template <class _Up, class _Ep, |
468 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
469 | class = _EnableIfDeleterConvertible<_Ep> |
470 | > |
471 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
472 | unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept |
473 | : __ptr_(__u.release(), _VSTDstd::__1::forward<_Ep>(__u.get_deleter())) { |
474 | } |
475 | |
476 | template <class _Up, class _Ep, |
477 | class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, |
478 | class = _EnableIfDeleterAssignable<_Ep> |
479 | > |
480 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
481 | unique_ptr& |
482 | operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPTnoexcept { |
483 | reset(__u.release()); |
484 | __ptr_.second() = _VSTDstd::__1::forward<_Ep>(__u.get_deleter()); |
485 | return *this; |
486 | } |
487 | |
488 | #ifdef _LIBCPP_CXX03_LANG |
489 | unique_ptr(unique_ptr const&) = delete; |
490 | unique_ptr& operator=(unique_ptr const&) = delete; |
491 | #endif |
492 | |
493 | public: |
494 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
495 | ~unique_ptr() { reset(); } |
496 | |
497 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
498 | unique_ptr& operator=(nullptr_t) _NOEXCEPTnoexcept { |
499 | reset(); |
500 | return *this; |
501 | } |
502 | |
503 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
504 | typename add_lvalue_reference<_Tp>::type |
505 | operator[](size_t __i) const { |
506 | return __ptr_.first()[__i]; |
507 | } |
508 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
509 | pointer get() const _NOEXCEPTnoexcept { |
510 | return __ptr_.first(); |
511 | } |
512 | |
513 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
514 | deleter_type& get_deleter() _NOEXCEPTnoexcept { |
515 | return __ptr_.second(); |
516 | } |
517 | |
518 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
519 | const deleter_type& get_deleter() const _NOEXCEPTnoexcept { |
520 | return __ptr_.second(); |
521 | } |
522 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
523 | explicit operator bool() const _NOEXCEPTnoexcept { |
524 | return __ptr_.first() != nullptr; |
525 | } |
526 | |
527 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
528 | pointer release() _NOEXCEPTnoexcept { |
529 | pointer __t = __ptr_.first(); |
530 | __ptr_.first() = pointer(); |
531 | return __t; |
532 | } |
533 | |
534 | template <class _Pp> |
535 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
536 | typename enable_if< |
537 | _CheckArrayPointerConversion<_Pp>::value |
538 | >::type |
539 | reset(_Pp __p) _NOEXCEPTnoexcept { |
540 | pointer __tmp = __ptr_.first(); |
541 | __ptr_.first() = __p; |
542 | if (__tmp) |
543 | __ptr_.second()(__tmp); |
544 | } |
545 | |
546 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
547 | void reset(nullptr_t = nullptr) _NOEXCEPTnoexcept { |
548 | pointer __tmp = __ptr_.first(); |
549 | __ptr_.first() = nullptr; |
550 | if (__tmp) |
551 | __ptr_.second()(__tmp); |
552 | } |
553 | |
554 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
555 | void swap(unique_ptr& __u) _NOEXCEPTnoexcept { |
556 | __ptr_.swap(__u.__ptr_); |
557 | } |
558 | |
559 | }; |
560 | |
561 | template <class _Tp, class _Dp> |
562 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
563 | typename enable_if< |
564 | __is_swappable<_Dp>::value, |
565 | void |
566 | >::type |
567 | swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPTnoexcept {__x.swap(__y);} |
568 | |
569 | template <class _T1, class _D1, class _T2, class _D2> |
570 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
571 | bool |
572 | operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} |
573 | |
574 | template <class _T1, class _D1, class _T2, class _D2> |
575 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
576 | bool |
577 | operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} |
578 | |
579 | template <class _T1, class _D1, class _T2, class _D2> |
580 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
581 | bool |
582 | operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) |
583 | { |
584 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
585 | typedef typename unique_ptr<_T2, _D2>::pointer _P2; |
586 | typedef typename common_type<_P1, _P2>::type _Vp; |
587 | return less<_Vp>()(__x.get(), __y.get()); |
588 | } |
589 | |
590 | template <class _T1, class _D1, class _T2, class _D2> |
591 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
592 | bool |
593 | operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} |
594 | |
595 | template <class _T1, class _D1, class _T2, class _D2> |
596 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
597 | bool |
598 | operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} |
599 | |
600 | template <class _T1, class _D1, class _T2, class _D2> |
601 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
602 | bool |
603 | operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} |
604 | |
605 | template <class _T1, class _D1> |
606 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
607 | bool |
608 | operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPTnoexcept |
609 | { |
610 | return !__x; |
611 | } |
612 | |
613 | template <class _T1, class _D1> |
614 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
615 | bool |
616 | operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPTnoexcept |
617 | { |
618 | return !__x; |
619 | } |
620 | |
621 | template <class _T1, class _D1> |
622 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
623 | bool |
624 | operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPTnoexcept |
625 | { |
626 | return static_cast<bool>(__x); |
627 | } |
628 | |
629 | template <class _T1, class _D1> |
630 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
631 | bool |
632 | operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPTnoexcept |
633 | { |
634 | return static_cast<bool>(__x); |
635 | } |
636 | |
637 | template <class _T1, class _D1> |
638 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
639 | bool |
640 | operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
641 | { |
642 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
643 | return less<_P1>()(__x.get(), nullptr); |
644 | } |
645 | |
646 | template <class _T1, class _D1> |
647 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
648 | bool |
649 | operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
650 | { |
651 | typedef typename unique_ptr<_T1, _D1>::pointer _P1; |
652 | return less<_P1>()(nullptr, __x.get()); |
653 | } |
654 | |
655 | template <class _T1, class _D1> |
656 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
657 | bool |
658 | operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
659 | { |
660 | return nullptr < __x; |
661 | } |
662 | |
663 | template <class _T1, class _D1> |
664 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
665 | bool |
666 | operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
667 | { |
668 | return __x < nullptr; |
669 | } |
670 | |
671 | template <class _T1, class _D1> |
672 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
673 | bool |
674 | operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
675 | { |
676 | return !(nullptr < __x); |
677 | } |
678 | |
679 | template <class _T1, class _D1> |
680 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
681 | bool |
682 | operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
683 | { |
684 | return !(__x < nullptr); |
685 | } |
686 | |
687 | template <class _T1, class _D1> |
688 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
689 | bool |
690 | operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) |
691 | { |
692 | return !(__x < nullptr); |
693 | } |
694 | |
695 | template <class _T1, class _D1> |
696 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
697 | bool |
698 | operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) |
699 | { |
700 | return !(nullptr < __x); |
701 | } |
702 | |
703 | #if _LIBCPP_STD_VER14 > 11 |
704 | |
705 | template<class _Tp> |
706 | struct __unique_if |
707 | { |
708 | typedef unique_ptr<_Tp> __unique_single; |
709 | }; |
710 | |
711 | template<class _Tp> |
712 | struct __unique_if<_Tp[]> |
713 | { |
714 | typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; |
715 | }; |
716 | |
717 | template<class _Tp, size_t _Np> |
718 | struct __unique_if<_Tp[_Np]> |
719 | { |
720 | typedef void __unique_array_known_bound; |
721 | }; |
722 | |
723 | template<class _Tp, class... _Args> |
724 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
725 | typename __unique_if<_Tp>::__unique_single |
726 | make_unique(_Args&&... __args) |
727 | { |
728 | return unique_ptr<_Tp>(new _Tp(_VSTDstd::__1::forward<_Args>(__args)...)); |
729 | } |
730 | |
731 | template<class _Tp> |
732 | inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
733 | typename __unique_if<_Tp>::__unique_array_unknown_bound |
734 | make_unique(size_t __n) |
735 | { |
736 | typedef typename remove_extent<_Tp>::type _Up; |
737 | return unique_ptr<_Tp>(new _Up[__n]()); |
738 | } |
739 | |
740 | template<class _Tp, class... _Args> |
741 | typename __unique_if<_Tp>::__unique_array_known_bound |
742 | make_unique(_Args&&...) = delete; |
743 | |
744 | #endif // _LIBCPP_STD_VER > 11 |
745 | |
746 | template <class _Tp> struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash; |
747 | |
748 | template <class _Tp, class _Dp> |
749 | #ifdef _LIBCPP_CXX03_LANG |
750 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash<unique_ptr<_Tp, _Dp> > |
751 | #else |
752 | struct _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) hash<__enable_hash_helper< |
753 | unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > |
754 | #endif |
755 | { |
756 | #if _LIBCPP_STD_VER14 <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS) |
757 | _LIBCPP_DEPRECATED_IN_CXX17 typedef unique_ptr<_Tp, _Dp> argument_type; |
758 | _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t result_type; |
759 | #endif |
760 | |
761 | _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__ )) |
762 | size_t operator()(const unique_ptr<_Tp, _Dp>& __ptr) const |
763 | { |
764 | typedef typename unique_ptr<_Tp, _Dp>::pointer pointer; |
765 | return hash<pointer>()(__ptr.get()); |
766 | } |
767 | }; |
768 | |
769 | _LIBCPP_END_NAMESPACE_STD} } |
770 | |
771 | _LIBCPP_POP_MACROSpop_macro("min") pop_macro("max") |
772 | |
773 | #endif // _LIBCPP___MEMORY_UNIQUE_PTR_H |