| File: | src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c |
| Warning: | line 1178, column 4 Dereference of null pointer |
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| 1 | /* .eh_frame section optimization. | |||
| 2 | Copyright 2001, 2002, 2003 Free Software Foundation, Inc. | |||
| 3 | Written by Jakub Jelinek <jakub@redhat.com>. | |||
| 4 | ||||
| 5 | This file is part of BFD, the Binary File Descriptor library. | |||
| 6 | ||||
| 7 | This program is free software; you can redistribute it and/or modify | |||
| 8 | it under the terms of the GNU General Public License as published by | |||
| 9 | the Free Software Foundation; either version 2 of the License, or | |||
| 10 | (at your option) any later version. | |||
| 11 | ||||
| 12 | This program is distributed in the hope that it will be useful, | |||
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |||
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |||
| 15 | GNU General Public License for more details. | |||
| 16 | ||||
| 17 | You should have received a copy of the GNU General Public License | |||
| 18 | along with this program; if not, write to the Free Software | |||
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |||
| 20 | ||||
| 21 | #include "bfd.h" | |||
| 22 | #include "sysdep.h" | |||
| 23 | #include "libbfd.h" | |||
| 24 | #include "elf-bfd.h" | |||
| 25 | #include "elf/dwarf2.h" | |||
| 26 | ||||
| 27 | #define EH_FRAME_HDR_SIZE8 8 | |||
| 28 | ||||
| 29 | /* Helper function for reading uleb128 encoded data. */ | |||
| 30 | ||||
| 31 | static bfd_vma | |||
| 32 | read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 33 | char *buf, | |||
| 34 | unsigned int *bytes_read_ptr) | |||
| 35 | { | |||
| 36 | bfd_vma result; | |||
| 37 | unsigned int num_read; | |||
| 38 | int shift; | |||
| 39 | unsigned char byte; | |||
| 40 | ||||
| 41 | result = 0; | |||
| 42 | shift = 0; | |||
| 43 | num_read = 0; | |||
| 44 | do | |||
| 45 | { | |||
| 46 | byte = bfd_get_8 (abfd, (bfd_byte *) buf)(*(unsigned char *) ((bfd_byte *) buf) & 0xff); | |||
| 47 | buf++; | |||
| 48 | num_read++; | |||
| 49 | result |= (((bfd_vma) byte & 0x7f) << shift); | |||
| 50 | shift += 7; | |||
| 51 | } | |||
| 52 | while (byte & 0x80); | |||
| 53 | *bytes_read_ptr = num_read; | |||
| 54 | return result; | |||
| 55 | } | |||
| 56 | ||||
| 57 | /* Helper function for reading sleb128 encoded data. */ | |||
| 58 | ||||
| 59 | static bfd_signed_vma | |||
| 60 | read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 61 | char *buf, | |||
| 62 | unsigned int * bytes_read_ptr) | |||
| 63 | { | |||
| 64 | bfd_vma result; | |||
| 65 | int shift; | |||
| 66 | int num_read; | |||
| 67 | unsigned char byte; | |||
| 68 | ||||
| 69 | result = 0; | |||
| 70 | shift = 0; | |||
| 71 | num_read = 0; | |||
| 72 | do | |||
| 73 | { | |||
| 74 | byte = bfd_get_8 (abfd, (bfd_byte *) buf)(*(unsigned char *) ((bfd_byte *) buf) & 0xff); | |||
| 75 | buf ++; | |||
| 76 | num_read ++; | |||
| 77 | result |= (((bfd_vma) byte & 0x7f) << shift); | |||
| 78 | shift += 7; | |||
| 79 | } | |||
| 80 | while (byte & 0x80); | |||
| 81 | if (byte & 0x40) | |||
| 82 | result |= (((bfd_vma) -1) << (shift - 7)) << 7; | |||
| 83 | *bytes_read_ptr = num_read; | |||
| 84 | return result; | |||
| 85 | } | |||
| 86 | ||||
| 87 | #define read_uleb128(VAR, BUF)do { (VAR) = read_unsigned_leb128 (abfd, buf, &leb128_tmp ); (BUF) += leb128_tmp; } while (0) \ | |||
| 88 | do \ | |||
| 89 | { \ | |||
| 90 | (VAR) = read_unsigned_leb128 (abfd, buf, &leb128_tmp); \ | |||
| 91 | (BUF) += leb128_tmp; \ | |||
| 92 | } \ | |||
| 93 | while (0) | |||
| 94 | ||||
| 95 | #define read_sleb128(VAR, BUF)do { (VAR) = read_signed_leb128 (abfd, buf, &leb128_tmp); (BUF) += leb128_tmp; } while (0) \ | |||
| 96 | do \ | |||
| 97 | { \ | |||
| 98 | (VAR) = read_signed_leb128 (abfd, buf, &leb128_tmp); \ | |||
| 99 | (BUF) += leb128_tmp; \ | |||
| 100 | } \ | |||
| 101 | while (0) | |||
| 102 | ||||
| 103 | /* Return 0 if either encoding is variable width, or not yet known to bfd. */ | |||
| 104 | ||||
| 105 | static | |||
| 106 | int get_DW_EH_PE_width (int encoding, int ptr_size) | |||
| 107 | { | |||
| 108 | /* DW_EH_PE_ values of 0x60 and 0x70 weren't defined at the time .eh_frame | |||
| 109 | was added to bfd. */ | |||
| 110 | if ((encoding & 0x60) == 0x60) | |||
| 111 | return 0; | |||
| 112 | ||||
| 113 | switch (encoding & 7) | |||
| 114 | { | |||
| 115 | case DW_EH_PE_udata20x02: return 2; | |||
| 116 | case DW_EH_PE_udata40x03: return 4; | |||
| 117 | case DW_EH_PE_udata80x04: return 8; | |||
| 118 | case DW_EH_PE_absptr0x00: return ptr_size; | |||
| 119 | default: | |||
| 120 | break; | |||
| 121 | } | |||
| 122 | ||||
| 123 | return 0; | |||
| 124 | } | |||
| 125 | ||||
| 126 | #define get_DW_EH_PE_signed(encoding)(((encoding) & 0x08) != 0) (((encoding) & DW_EH_PE_signed0x08) != 0) | |||
| 127 | ||||
| 128 | /* Read a width sized value from memory. */ | |||
| 129 | ||||
| 130 | static bfd_vma | |||
| 131 | read_value (bfd *abfd, bfd_byte *buf, int width, int is_signed) | |||
| 132 | { | |||
| 133 | bfd_vma value; | |||
| 134 | ||||
| 135 | switch (width) | |||
| 136 | { | |||
| 137 | case 2: | |||
| 138 | if (is_signed) | |||
| 139 | value = bfd_get_signed_16 (abfd, buf)((*((abfd)->xvec->bfd_getx_signed_16)) (buf)); | |||
| 140 | else | |||
| 141 | value = bfd_get_16 (abfd, buf)((*((abfd)->xvec->bfd_getx16)) (buf)); | |||
| 142 | break; | |||
| 143 | case 4: | |||
| 144 | if (is_signed) | |||
| 145 | value = bfd_get_signed_32 (abfd, buf)((*((abfd)->xvec->bfd_getx_signed_32)) (buf)); | |||
| 146 | else | |||
| 147 | value = bfd_get_32 (abfd, buf)((*((abfd)->xvec->bfd_getx32)) (buf)); | |||
| 148 | break; | |||
| 149 | case 8: | |||
| 150 | if (is_signed) | |||
| 151 | value = bfd_get_signed_64 (abfd, buf)((*((abfd)->xvec->bfd_getx_signed_64)) (buf)); | |||
| 152 | else | |||
| 153 | value = bfd_get_64 (abfd, buf)((*((abfd)->xvec->bfd_getx64)) (buf)); | |||
| 154 | break; | |||
| 155 | default: | |||
| 156 | BFD_FAIL (){ bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,156); }; | |||
| 157 | return 0; | |||
| 158 | } | |||
| 159 | ||||
| 160 | return value; | |||
| 161 | } | |||
| 162 | ||||
| 163 | /* Store a width sized value to memory. */ | |||
| 164 | ||||
| 165 | static void | |||
| 166 | write_value (bfd *abfd, bfd_byte *buf, bfd_vma value, int width) | |||
| 167 | { | |||
| 168 | switch (width) | |||
| 169 | { | |||
| 170 | case 2: bfd_put_16 (abfd, value, buf)((*((abfd)->xvec->bfd_putx16)) ((value),(buf))); break; | |||
| 171 | case 4: bfd_put_32 (abfd, value, buf)((*((abfd)->xvec->bfd_putx32)) ((value),(buf))); break; | |||
| 172 | case 8: bfd_put_64 (abfd, value, buf)((*((abfd)->xvec->bfd_putx64)) ((value), (buf))); break; | |||
| 173 | default: BFD_FAIL (){ bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,173); }; | |||
| 174 | } | |||
| 175 | } | |||
| 176 | ||||
| 177 | /* Return zero if C1 and C2 CIEs can be merged. */ | |||
| 178 | ||||
| 179 | static | |||
| 180 | int cie_compare (struct cie *c1, struct cie *c2) | |||
| 181 | { | |||
| 182 | if (c1->hdr.length == c2->hdr.length | |||
| 183 | && c1->version == c2->version | |||
| 184 | && strcmp (c1->augmentation, c2->augmentation) == 0 | |||
| 185 | && strcmp (c1->augmentation, "eh") != 0 | |||
| 186 | && c1->code_align == c2->code_align | |||
| 187 | && c1->data_align == c2->data_align | |||
| 188 | && c1->ra_column == c2->ra_column | |||
| 189 | && c1->augmentation_size == c2->augmentation_size | |||
| 190 | && c1->personality == c2->personality | |||
| 191 | && c1->per_encoding == c2->per_encoding | |||
| 192 | && c1->lsda_encoding == c2->lsda_encoding | |||
| 193 | && c1->fde_encoding == c2->fde_encoding | |||
| 194 | && c1->initial_insn_length == c2->initial_insn_length | |||
| 195 | && memcmp (c1->initial_instructions, | |||
| 196 | c2->initial_instructions, | |||
| 197 | c1->initial_insn_length) == 0) | |||
| 198 | return 0; | |||
| 199 | ||||
| 200 | return 1; | |||
| 201 | } | |||
| 202 | ||||
| 203 | /* This function is called for each input file before the .eh_frame | |||
| 204 | section is relocated. It discards duplicate CIEs and FDEs for discarded | |||
| 205 | functions. The function returns TRUE iff any entries have been | |||
| 206 | deleted. */ | |||
| 207 | ||||
| 208 | bfd_boolean | |||
| 209 | _bfd_elf_discard_section_eh_frame | |||
| 210 | (bfd *abfd, struct bfd_link_info *info, asection *sec, | |||
| 211 | bfd_boolean (*reloc_symbol_deleted_p) (bfd_vma, void *), | |||
| 212 | struct elf_reloc_cookie *cookie) | |||
| 213 | { | |||
| 214 | bfd_byte *ehbuf = NULL((void*)0), *buf; | |||
| 215 | bfd_byte *last_cie, *last_fde; | |||
| 216 | struct cie_header hdr; | |||
| 217 | struct cie cie; | |||
| 218 | struct elf_link_hash_table *htab; | |||
| 219 | struct eh_frame_hdr_info *hdr_info; | |||
| 220 | struct eh_frame_sec_info *sec_info = NULL((void*)0); | |||
| 221 | unsigned int leb128_tmp; | |||
| 222 | unsigned int cie_usage_count, last_cie_ndx, i, offset; | |||
| 223 | unsigned int make_relative, make_lsda_relative; | |||
| 224 | bfd_size_type new_size; | |||
| 225 | unsigned int ptr_size; | |||
| 226 | ||||
| 227 | if (sec->_raw_size == 0) | |||
| 228 | { | |||
| 229 | /* This file does not contain .eh_frame information. */ | |||
| 230 | return FALSE0; | |||
| 231 | } | |||
| 232 | ||||
| 233 | if ((sec->output_section != NULL((void*)0) | |||
| 234 | && bfd_is_abs_section (sec->output_section)((sec->output_section) == ((asection *) &bfd_abs_section )))) | |||
| 235 | { | |||
| 236 | /* At least one of the sections is being discarded from the | |||
| 237 | link, so we should just ignore them. */ | |||
| 238 | return FALSE0; | |||
| 239 | } | |||
| 240 | ||||
| 241 | htab = elf_hash_table (info)((struct elf_link_hash_table *) ((info)->hash)); | |||
| 242 | hdr_info = &htab->eh_info; | |||
| 243 | ||||
| 244 | /* Read the frame unwind information from abfd. */ | |||
| 245 | ||||
| 246 | ehbuf = bfd_malloc (sec->_raw_size); | |||
| 247 | if (ehbuf == NULL((void*)0)) | |||
| 248 | goto free_no_table; | |||
| 249 | ||||
| 250 | if (! bfd_get_section_contents (abfd, sec, ehbuf, 0, sec->_raw_size)) | |||
| 251 | goto free_no_table; | |||
| 252 | ||||
| 253 | if (sec->_raw_size >= 4 | |||
| 254 | && bfd_get_32 (abfd, ehbuf)((*((abfd)->xvec->bfd_getx32)) (ehbuf)) == 0 | |||
| 255 | && cookie->rel == cookie->relend) | |||
| 256 | { | |||
| 257 | /* Empty .eh_frame section. */ | |||
| 258 | free (ehbuf); | |||
| 259 | return FALSE0; | |||
| 260 | } | |||
| 261 | ||||
| 262 | /* If .eh_frame section size doesn't fit into int, we cannot handle | |||
| 263 | it (it would need to use 64-bit .eh_frame format anyway). */ | |||
| 264 | if (sec->_raw_size != (unsigned int) sec->_raw_size) | |||
| 265 | goto free_no_table; | |||
| 266 | ||||
| 267 | ptr_size = (elf_elfheader (abfd)(((abfd) -> tdata.elf_obj_data) -> elf_header)->e_ident[EI_CLASS4] | |||
| 268 | == ELFCLASS642) ? 8 : 4; | |||
| 269 | buf = ehbuf; | |||
| 270 | last_cie = NULL((void*)0); | |||
| 271 | last_cie_ndx = 0; | |||
| 272 | memset (&cie, 0, sizeof (cie)); | |||
| 273 | cie_usage_count = 0; | |||
| 274 | new_size = sec->_raw_size; | |||
| 275 | make_relative = hdr_info->last_cie.make_relative; | |||
| 276 | make_lsda_relative = hdr_info->last_cie.make_lsda_relative; | |||
| 277 | sec_info = bfd_zmalloc (sizeof (struct eh_frame_sec_info) | |||
| 278 | + 99 * sizeof (struct eh_cie_fde)); | |||
| 279 | if (sec_info == NULL((void*)0)) | |||
| 280 | goto free_no_table; | |||
| 281 | sec_info->alloced = 100; | |||
| 282 | ||||
| 283 | #define ENSURE_NO_RELOCS(buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table \ | |||
| 284 | if (cookie->rel < cookie->relend \ | |||
| 285 | && (cookie->rel->r_offset \ | |||
| 286 | < (bfd_size_type) ((buf) - ehbuf)) \ | |||
| 287 | && cookie->rel->r_info != 0) \ | |||
| 288 | goto free_no_table | |||
| 289 | ||||
| 290 | #define SKIP_RELOCS(buf)while (cookie->rel < cookie->relend && (cookie ->rel->r_offset < (bfd_size_type) ((buf) - ehbuf))) cookie ->rel++ \ | |||
| 291 | while (cookie->rel < cookie->relend \ | |||
| 292 | && (cookie->rel->r_offset \ | |||
| 293 | < (bfd_size_type) ((buf) - ehbuf))) \ | |||
| 294 | cookie->rel++ | |||
| 295 | ||||
| 296 | #define GET_RELOC(buf)((cookie->rel < cookie->relend && (cookie-> rel->r_offset == (bfd_size_type) ((buf) - ehbuf))) ? cookie ->rel : ((void*)0)) \ | |||
| 297 | ((cookie->rel < cookie->relend \ | |||
| 298 | && (cookie->rel->r_offset \ | |||
| 299 | == (bfd_size_type) ((buf) - ehbuf))) \ | |||
| 300 | ? cookie->rel : NULL((void*)0)) | |||
| 301 | ||||
| 302 | for (;;) | |||
| 303 | { | |||
| 304 | unsigned char *aug; | |||
| 305 | ||||
| 306 | if (sec_info->count == sec_info->alloced) | |||
| 307 | { | |||
| 308 | sec_info = bfd_realloc (sec_info, | |||
| 309 | sizeof (struct eh_frame_sec_info) | |||
| 310 | + (sec_info->alloced + 99) | |||
| 311 | * sizeof (struct eh_cie_fde)); | |||
| 312 | if (sec_info == NULL((void*)0)) | |||
| 313 | goto free_no_table; | |||
| 314 | ||||
| 315 | memset (&sec_info->entry[sec_info->alloced], 0, | |||
| 316 | 100 * sizeof (struct eh_cie_fde)); | |||
| 317 | sec_info->alloced += 100; | |||
| 318 | } | |||
| 319 | ||||
| 320 | last_fde = buf; | |||
| 321 | /* If we are at the end of the section, we still need to decide | |||
| 322 | on whether to output or discard last encountered CIE (if any). */ | |||
| 323 | if ((bfd_size_type) (buf - ehbuf) == sec->_raw_size) | |||
| 324 | hdr.id = (unsigned int) -1; | |||
| 325 | else | |||
| 326 | { | |||
| 327 | if ((bfd_size_type) (buf + 4 - ehbuf) > sec->_raw_size) | |||
| 328 | /* No space for CIE/FDE header length. */ | |||
| 329 | goto free_no_table; | |||
| 330 | ||||
| 331 | hdr.length = bfd_get_32 (abfd, buf)((*((abfd)->xvec->bfd_getx32)) (buf)); | |||
| 332 | if (hdr.length == 0xffffffff) | |||
| 333 | /* 64-bit .eh_frame is not supported. */ | |||
| 334 | goto free_no_table; | |||
| 335 | buf += 4; | |||
| 336 | if ((bfd_size_type) (buf - ehbuf) + hdr.length > sec->_raw_size) | |||
| 337 | /* CIE/FDE not contained fully in this .eh_frame input section. */ | |||
| 338 | goto free_no_table; | |||
| 339 | ||||
| 340 | sec_info->entry[sec_info->count].offset = last_fde - ehbuf; | |||
| 341 | sec_info->entry[sec_info->count].size = 4 + hdr.length; | |||
| 342 | ||||
| 343 | if (hdr.length == 0) | |||
| 344 | { | |||
| 345 | /* CIE with length 0 must be only the last in the section. */ | |||
| 346 | if ((bfd_size_type) (buf - ehbuf) < sec->_raw_size) | |||
| 347 | goto free_no_table; | |||
| 348 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 349 | sec_info->count++; | |||
| 350 | /* Now just finish last encountered CIE processing and break | |||
| 351 | the loop. */ | |||
| 352 | hdr.id = (unsigned int) -1; | |||
| 353 | } | |||
| 354 | else | |||
| 355 | { | |||
| 356 | hdr.id = bfd_get_32 (abfd, buf)((*((abfd)->xvec->bfd_getx32)) (buf)); | |||
| 357 | buf += 4; | |||
| 358 | if (hdr.id == (unsigned int) -1) | |||
| 359 | goto free_no_table; | |||
| 360 | } | |||
| 361 | } | |||
| 362 | ||||
| 363 | if (hdr.id == 0 || hdr.id == (unsigned int) -1) | |||
| 364 | { | |||
| 365 | unsigned int initial_insn_length; | |||
| 366 | ||||
| 367 | /* CIE */ | |||
| 368 | if (last_cie != NULL((void*)0)) | |||
| 369 | { | |||
| 370 | /* Now check if this CIE is identical to the last CIE, | |||
| 371 | in which case we can remove it provided we adjust | |||
| 372 | all FDEs. Also, it can be removed if we have removed | |||
| 373 | all FDEs using it. */ | |||
| 374 | if ((!info->relocatable | |||
| 375 | && hdr_info->last_cie_sec | |||
| 376 | && (sec->output_section | |||
| 377 | == hdr_info->last_cie_sec->output_section) | |||
| 378 | && cie_compare (&cie, &hdr_info->last_cie) == 0) | |||
| 379 | || cie_usage_count == 0) | |||
| 380 | { | |||
| 381 | new_size -= cie.hdr.length + 4; | |||
| 382 | sec_info->entry[last_cie_ndx].removed = 1; | |||
| 383 | sec_info->entry[last_cie_ndx].sec = hdr_info->last_cie_sec; | |||
| 384 | sec_info->entry[last_cie_ndx].new_offset | |||
| 385 | = hdr_info->last_cie_offset; | |||
| 386 | } | |||
| 387 | else | |||
| 388 | { | |||
| 389 | hdr_info->last_cie = cie; | |||
| 390 | hdr_info->last_cie_sec = sec; | |||
| 391 | hdr_info->last_cie_offset = last_cie - ehbuf; | |||
| 392 | sec_info->entry[last_cie_ndx].make_relative | |||
| 393 | = cie.make_relative; | |||
| 394 | sec_info->entry[last_cie_ndx].make_lsda_relative | |||
| 395 | = cie.make_lsda_relative; | |||
| 396 | sec_info->entry[last_cie_ndx].per_encoding_relative | |||
| 397 | = (cie.per_encoding & 0x70) == DW_EH_PE_pcrel0x10; | |||
| 398 | } | |||
| 399 | } | |||
| 400 | ||||
| 401 | if (hdr.id == (unsigned int) -1) | |||
| 402 | break; | |||
| 403 | ||||
| 404 | last_cie_ndx = sec_info->count; | |||
| 405 | sec_info->entry[sec_info->count].cie = 1; | |||
| 406 | ||||
| 407 | cie_usage_count = 0; | |||
| 408 | memset (&cie, 0, sizeof (cie)); | |||
| 409 | cie.hdr = hdr; | |||
| 410 | cie.version = *buf++; | |||
| 411 | ||||
| 412 | /* Cannot handle unknown versions. */ | |||
| 413 | if (cie.version != 1) | |||
| 414 | goto free_no_table; | |||
| 415 | if (strlen (buf) > sizeof (cie.augmentation) - 1) | |||
| 416 | goto free_no_table; | |||
| 417 | ||||
| 418 | strcpy (cie.augmentation, buf); | |||
| 419 | buf = strchr (buf, '\0') + 1; | |||
| 420 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 421 | if (buf[0] == 'e' && buf[1] == 'h') | |||
| 422 | { | |||
| 423 | /* GCC < 3.0 .eh_frame CIE */ | |||
| 424 | /* We cannot merge "eh" CIEs because __EXCEPTION_TABLE__ | |||
| 425 | is private to each CIE, so we don't need it for anything. | |||
| 426 | Just skip it. */ | |||
| 427 | buf += ptr_size; | |||
| 428 | SKIP_RELOCS (buf)while (cookie->rel < cookie->relend && (cookie ->rel->r_offset < (bfd_size_type) ((buf) - ehbuf))) cookie ->rel++; | |||
| 429 | } | |||
| 430 | read_uleb128 (cie.code_align, buf)do { (cie.code_align) = read_unsigned_leb128 (abfd, buf, & leb128_tmp); (buf) += leb128_tmp; } while (0); | |||
| 431 | read_sleb128 (cie.data_align, buf)do { (cie.data_align) = read_signed_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 432 | /* Note - in DWARF2 the return address column is an unsigned byte. | |||
| 433 | In DWARF3 it is a ULEB128. We are following DWARF3. For most | |||
| 434 | ports this will not matter as the value will be less than 128. | |||
| 435 | For the others (eg FRV, SH, MMIX, IA64) they need a fixed GCC | |||
| 436 | which conforms to the DWARF3 standard. */ | |||
| 437 | read_uleb128 (cie.ra_column, buf)do { (cie.ra_column) = read_unsigned_leb128 (abfd, buf, & leb128_tmp); (buf) += leb128_tmp; } while (0); | |||
| 438 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 439 | cie.lsda_encoding = DW_EH_PE_omit0xff; | |||
| 440 | cie.fde_encoding = DW_EH_PE_omit0xff; | |||
| 441 | cie.per_encoding = DW_EH_PE_omit0xff; | |||
| 442 | aug = cie.augmentation; | |||
| 443 | if (aug[0] != 'e' || aug[1] != 'h') | |||
| 444 | { | |||
| 445 | if (*aug == 'z') | |||
| 446 | { | |||
| 447 | aug++; | |||
| 448 | read_uleb128 (cie.augmentation_size, buf)do { (cie.augmentation_size) = read_unsigned_leb128 (abfd, buf , &leb128_tmp); (buf) += leb128_tmp; } while (0); | |||
| 449 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 450 | } | |||
| 451 | ||||
| 452 | while (*aug != '\0') | |||
| 453 | switch (*aug++) | |||
| 454 | { | |||
| 455 | case 'L': | |||
| 456 | cie.lsda_encoding = *buf++; | |||
| 457 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 458 | if (get_DW_EH_PE_width (cie.lsda_encoding, ptr_size) == 0) | |||
| 459 | goto free_no_table; | |||
| 460 | break; | |||
| 461 | case 'R': | |||
| 462 | cie.fde_encoding = *buf++; | |||
| 463 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 464 | if (get_DW_EH_PE_width (cie.fde_encoding, ptr_size) == 0) | |||
| 465 | goto free_no_table; | |||
| 466 | break; | |||
| 467 | case 'P': | |||
| 468 | { | |||
| 469 | int per_width; | |||
| 470 | ||||
| 471 | cie.per_encoding = *buf++; | |||
| 472 | per_width = get_DW_EH_PE_width (cie.per_encoding, | |||
| 473 | ptr_size); | |||
| 474 | if (per_width == 0) | |||
| 475 | goto free_no_table; | |||
| 476 | if ((cie.per_encoding & 0xf0) == DW_EH_PE_aligned0x50) | |||
| 477 | buf = (ehbuf | |||
| 478 | + ((buf - ehbuf + per_width - 1) | |||
| 479 | & ~((bfd_size_type) per_width - 1))); | |||
| 480 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 481 | /* Ensure we have a reloc here, against | |||
| 482 | a global symbol. */ | |||
| 483 | if (GET_RELOC (buf)((cookie->rel < cookie->relend && (cookie-> rel->r_offset == (bfd_size_type) ((buf) - ehbuf))) ? cookie ->rel : ((void*)0)) != NULL((void*)0)) | |||
| 484 | { | |||
| 485 | unsigned long r_symndx; | |||
| 486 | ||||
| 487 | #ifdef BFD64 | |||
| 488 | if (ptr_size == 8) | |||
| 489 | r_symndx = ELF64_R_SYM (cookie->rel->r_info)((cookie->rel->r_info) >> 32); | |||
| 490 | else | |||
| 491 | #endif | |||
| 492 | r_symndx = ELF32_R_SYM (cookie->rel->r_info)((cookie->rel->r_info) >> 8); | |||
| 493 | if (r_symndx >= cookie->locsymcount) | |||
| 494 | { | |||
| 495 | struct elf_link_hash_entry *h; | |||
| 496 | ||||
| 497 | r_symndx -= cookie->extsymoff; | |||
| 498 | h = cookie->sym_hashes[r_symndx]; | |||
| 499 | ||||
| 500 | while (h->root.type == bfd_link_hash_indirect | |||
| 501 | || h->root.type == bfd_link_hash_warning) | |||
| 502 | h = (struct elf_link_hash_entry *) | |||
| 503 | h->root.u.i.link; | |||
| 504 | ||||
| 505 | cie.personality = h; | |||
| 506 | } | |||
| 507 | cookie->rel++; | |||
| 508 | } | |||
| 509 | buf += per_width; | |||
| 510 | } | |||
| 511 | break; | |||
| 512 | default: | |||
| 513 | /* Unrecognized augmentation. Better bail out. */ | |||
| 514 | goto free_no_table; | |||
| 515 | } | |||
| 516 | } | |||
| 517 | ||||
| 518 | /* For shared libraries, try to get rid of as many RELATIVE relocs | |||
| 519 | as possible. */ | |||
| 520 | if (info->shared | |||
| 521 | && (get_elf_backend_data (abfd)((const struct elf_backend_data *) (abfd)->xvec->backend_data ) | |||
| 522 | ->elf_backend_can_make_relative_eh_frame | |||
| 523 | (abfd, info, sec)) | |||
| 524 | && (cie.fde_encoding & 0xf0) == DW_EH_PE_absptr0x00) | |||
| 525 | cie.make_relative = 1; | |||
| 526 | ||||
| 527 | if (info->shared | |||
| 528 | && (get_elf_backend_data (abfd)((const struct elf_backend_data *) (abfd)->xvec->backend_data ) | |||
| 529 | ->elf_backend_can_make_lsda_relative_eh_frame | |||
| 530 | (abfd, info, sec)) | |||
| 531 | && (cie.lsda_encoding & 0xf0) == DW_EH_PE_absptr0x00) | |||
| 532 | cie.make_lsda_relative = 1; | |||
| 533 | ||||
| 534 | /* If FDE encoding was not specified, it defaults to | |||
| 535 | DW_EH_absptr. */ | |||
| 536 | if (cie.fde_encoding == DW_EH_PE_omit0xff) | |||
| 537 | cie.fde_encoding = DW_EH_PE_absptr0x00; | |||
| 538 | ||||
| 539 | initial_insn_length = cie.hdr.length - (buf - last_fde - 4); | |||
| 540 | if (initial_insn_length <= 50) | |||
| 541 | { | |||
| 542 | cie.initial_insn_length = initial_insn_length; | |||
| 543 | memcpy (cie.initial_instructions, buf, initial_insn_length); | |||
| 544 | } | |||
| 545 | buf += initial_insn_length; | |||
| 546 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 547 | last_cie = last_fde; | |||
| 548 | } | |||
| 549 | else | |||
| 550 | { | |||
| 551 | /* Ensure this FDE uses the last CIE encountered. */ | |||
| 552 | if (last_cie == NULL((void*)0) | |||
| 553 | || hdr.id != (unsigned int) (buf - 4 - last_cie)) | |||
| 554 | goto free_no_table; | |||
| 555 | ||||
| 556 | ENSURE_NO_RELOCS (buf)if (cookie->rel < cookie->relend && (cookie-> rel->r_offset < (bfd_size_type) ((buf) - ehbuf)) && cookie->rel->r_info != 0) goto free_no_table; | |||
| 557 | if (GET_RELOC (buf)((cookie->rel < cookie->relend && (cookie-> rel->r_offset == (bfd_size_type) ((buf) - ehbuf))) ? cookie ->rel : ((void*)0)) == NULL((void*)0)) | |||
| 558 | /* This should not happen. */ | |||
| 559 | goto free_no_table; | |||
| 560 | if ((*reloc_symbol_deleted_p) (buf - ehbuf, cookie)) | |||
| 561 | { | |||
| 562 | /* This is a FDE against a discarded section. It should | |||
| 563 | be deleted. */ | |||
| 564 | new_size -= hdr.length + 4; | |||
| 565 | sec_info->entry[sec_info->count].removed = 1; | |||
| 566 | } | |||
| 567 | else | |||
| 568 | { | |||
| 569 | if (info->shared | |||
| 570 | && (((cie.fde_encoding & 0xf0) == DW_EH_PE_absptr0x00 | |||
| 571 | && cie.make_relative == 0) | |||
| 572 | || (cie.fde_encoding & 0xf0) == DW_EH_PE_aligned0x50)) | |||
| 573 | { | |||
| 574 | /* If a shared library uses absolute pointers | |||
| 575 | which we cannot turn into PC relative, | |||
| 576 | don't create the binary search table, | |||
| 577 | since it is affected by runtime relocations. */ | |||
| 578 | hdr_info->table = FALSE0; | |||
| 579 | } | |||
| 580 | cie_usage_count++; | |||
| 581 | hdr_info->fde_count++; | |||
| 582 | } | |||
| 583 | if (cie.lsda_encoding != DW_EH_PE_omit0xff) | |||
| 584 | { | |||
| 585 | unsigned int dummy; | |||
| 586 | ||||
| 587 | aug = buf; | |||
| 588 | buf += 2 * get_DW_EH_PE_width (cie.fde_encoding, ptr_size); | |||
| 589 | if (cie.augmentation[0] == 'z') | |||
| 590 | read_uleb128 (dummy, buf)do { (dummy) = read_unsigned_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 591 | /* If some new augmentation data is added before LSDA | |||
| 592 | in FDE augmentation area, this need to be adjusted. */ | |||
| 593 | sec_info->entry[sec_info->count].lsda_offset = (buf - aug); | |||
| 594 | } | |||
| 595 | buf = last_fde + 4 + hdr.length; | |||
| 596 | SKIP_RELOCS (buf)while (cookie->rel < cookie->relend && (cookie ->rel->r_offset < (bfd_size_type) ((buf) - ehbuf))) cookie ->rel++; | |||
| 597 | } | |||
| 598 | ||||
| 599 | sec_info->entry[sec_info->count].fde_encoding = cie.fde_encoding; | |||
| 600 | sec_info->entry[sec_info->count].lsda_encoding = cie.lsda_encoding; | |||
| 601 | sec_info->count++; | |||
| 602 | } | |||
| 603 | ||||
| 604 | elf_section_data (sec)((struct bfd_elf_section_data*)sec->used_by_bfd)->sec_info = sec_info; | |||
| 605 | sec->sec_info_type = ELF_INFO_TYPE_EH_FRAME3; | |||
| 606 | ||||
| 607 | /* Ok, now we can assign new offsets. */ | |||
| 608 | offset = 0; | |||
| 609 | last_cie_ndx = 0; | |||
| 610 | for (i = 0; i < sec_info->count; i++) | |||
| 611 | { | |||
| 612 | if (! sec_info->entry[i].removed) | |||
| 613 | { | |||
| 614 | sec_info->entry[i].new_offset = offset; | |||
| 615 | offset += sec_info->entry[i].size; | |||
| 616 | if (sec_info->entry[i].cie) | |||
| 617 | { | |||
| 618 | last_cie_ndx = i; | |||
| 619 | make_relative = sec_info->entry[i].make_relative; | |||
| 620 | make_lsda_relative = sec_info->entry[i].make_lsda_relative; | |||
| 621 | } | |||
| 622 | else | |||
| 623 | { | |||
| 624 | sec_info->entry[i].make_relative = make_relative; | |||
| 625 | sec_info->entry[i].make_lsda_relative = make_lsda_relative; | |||
| 626 | sec_info->entry[i].per_encoding_relative = 0; | |||
| 627 | } | |||
| 628 | } | |||
| 629 | else if (sec_info->entry[i].cie && sec_info->entry[i].sec == sec) | |||
| 630 | { | |||
| 631 | /* Need to adjust new_offset too. */ | |||
| 632 | BFD_ASSERT (sec_info->entry[last_cie_ndx].offset{ if (!(sec_info->entry[last_cie_ndx].offset == sec_info-> entry[i].new_offset)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,633); } | |||
| 633 | == sec_info->entry[i].new_offset){ if (!(sec_info->entry[last_cie_ndx].offset == sec_info-> entry[i].new_offset)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,633); }; | |||
| 634 | sec_info->entry[i].new_offset | |||
| 635 | = sec_info->entry[last_cie_ndx].new_offset; | |||
| 636 | } | |||
| 637 | } | |||
| 638 | if (hdr_info->last_cie_sec == sec) | |||
| 639 | { | |||
| 640 | BFD_ASSERT (sec_info->entry[last_cie_ndx].offset{ if (!(sec_info->entry[last_cie_ndx].offset == hdr_info-> last_cie_offset)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,641); } | |||
| 641 | == hdr_info->last_cie_offset){ if (!(sec_info->entry[last_cie_ndx].offset == hdr_info-> last_cie_offset)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,641); }; | |||
| 642 | hdr_info->last_cie_offset = sec_info->entry[last_cie_ndx].new_offset; | |||
| 643 | } | |||
| 644 | ||||
| 645 | /* FIXME: Currently it is not possible to shrink sections to zero size at | |||
| 646 | this point, so build a fake minimal CIE. */ | |||
| 647 | if (new_size == 0) | |||
| 648 | new_size = 16; | |||
| 649 | ||||
| 650 | /* Shrink the sec as needed. */ | |||
| 651 | sec->_cooked_size = new_size; | |||
| 652 | if (sec->_cooked_size == 0) | |||
| 653 | sec->flags |= SEC_EXCLUDE0x40000; | |||
| 654 | ||||
| 655 | free (ehbuf); | |||
| 656 | return new_size != sec->_raw_size; | |||
| 657 | ||||
| 658 | free_no_table: | |||
| 659 | if (ehbuf) | |||
| 660 | free (ehbuf); | |||
| 661 | if (sec_info) | |||
| 662 | free (sec_info); | |||
| 663 | hdr_info->table = FALSE0; | |||
| 664 | hdr_info->last_cie.hdr.length = 0; | |||
| 665 | return FALSE0; | |||
| 666 | } | |||
| 667 | ||||
| 668 | /* This function is called for .eh_frame_hdr section after | |||
| 669 | _bfd_elf_discard_section_eh_frame has been called on all .eh_frame | |||
| 670 | input sections. It finalizes the size of .eh_frame_hdr section. */ | |||
| 671 | ||||
| 672 | bfd_boolean | |||
| 673 | _bfd_elf_discard_section_eh_frame_hdr (bfd *abfd, struct bfd_link_info *info) | |||
| 674 | { | |||
| 675 | struct elf_link_hash_table *htab; | |||
| 676 | struct eh_frame_hdr_info *hdr_info; | |||
| 677 | asection *sec; | |||
| 678 | ||||
| 679 | htab = elf_hash_table (info)((struct elf_link_hash_table *) ((info)->hash)); | |||
| 680 | hdr_info = &htab->eh_info; | |||
| 681 | sec = hdr_info->hdr_sec; | |||
| 682 | if (sec == NULL((void*)0)) | |||
| 683 | return FALSE0; | |||
| 684 | ||||
| 685 | sec->_cooked_size = EH_FRAME_HDR_SIZE8; | |||
| 686 | if (hdr_info->table) | |||
| 687 | sec->_cooked_size += 4 + hdr_info->fde_count * 8; | |||
| 688 | ||||
| 689 | /* Request program headers to be recalculated. */ | |||
| 690 | elf_tdata (abfd)((abfd) -> tdata.elf_obj_data)->program_header_size = 0; | |||
| 691 | elf_tdata (abfd)((abfd) -> tdata.elf_obj_data)->eh_frame_hdr = sec; | |||
| 692 | return TRUE1; | |||
| 693 | } | |||
| 694 | ||||
| 695 | /* This function is called from size_dynamic_sections. | |||
| 696 | It needs to decide whether .eh_frame_hdr should be output or not, | |||
| 697 | because later on it is too late for calling _bfd_strip_section_from_output, | |||
| 698 | since dynamic symbol table has been sized. */ | |||
| 699 | ||||
| 700 | bfd_boolean | |||
| 701 | _bfd_elf_maybe_strip_eh_frame_hdr (struct bfd_link_info *info) | |||
| 702 | { | |||
| 703 | asection *o; | |||
| 704 | bfd *abfd; | |||
| 705 | struct elf_link_hash_table *htab; | |||
| 706 | struct eh_frame_hdr_info *hdr_info; | |||
| 707 | ||||
| 708 | htab = elf_hash_table (info)((struct elf_link_hash_table *) ((info)->hash)); | |||
| 709 | hdr_info = &htab->eh_info; | |||
| 710 | if (hdr_info->hdr_sec == NULL((void*)0)) | |||
| 711 | return TRUE1; | |||
| 712 | ||||
| 713 | if (bfd_is_abs_section (hdr_info->hdr_sec->output_section)((hdr_info->hdr_sec->output_section) == ((asection *) & bfd_abs_section))) | |||
| 714 | { | |||
| 715 | hdr_info->hdr_sec = NULL((void*)0); | |||
| 716 | return TRUE1; | |||
| 717 | } | |||
| 718 | ||||
| 719 | abfd = NULL((void*)0); | |||
| 720 | if (info->eh_frame_hdr) | |||
| 721 | for (abfd = info->input_bfds; abfd != NULL((void*)0); abfd = abfd->link_next) | |||
| 722 | { | |||
| 723 | /* Count only sections which have at least a single CIE or FDE. | |||
| 724 | There cannot be any CIE or FDE <= 8 bytes. */ | |||
| 725 | o = bfd_get_section_by_name (abfd, ".eh_frame"); | |||
| 726 | if (o && o->_raw_size > 8 && !bfd_is_abs_section (o->output_section)((o->output_section) == ((asection *) &bfd_abs_section ))) | |||
| 727 | break; | |||
| 728 | } | |||
| 729 | ||||
| 730 | if (abfd == NULL((void*)0)) | |||
| 731 | { | |||
| 732 | _bfd_strip_section_from_output (info, hdr_info->hdr_sec); | |||
| 733 | hdr_info->hdr_sec = NULL((void*)0); | |||
| 734 | return TRUE1; | |||
| 735 | } | |||
| 736 | ||||
| 737 | hdr_info->table = TRUE1; | |||
| 738 | return TRUE1; | |||
| 739 | } | |||
| 740 | ||||
| 741 | /* Adjust an address in the .eh_frame section. Given OFFSET within | |||
| 742 | SEC, this returns the new offset in the adjusted .eh_frame section, | |||
| 743 | or -1 if the address refers to a CIE/FDE which has been removed | |||
| 744 | or to offset with dynamic relocation which is no longer needed. */ | |||
| 745 | ||||
| 746 | bfd_vma | |||
| 747 | _bfd_elf_eh_frame_section_offset (bfd *output_bfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 748 | asection *sec, | |||
| 749 | bfd_vma offset) | |||
| 750 | { | |||
| 751 | struct eh_frame_sec_info *sec_info; | |||
| 752 | unsigned int lo, hi, mid; | |||
| 753 | ||||
| 754 | if (sec->sec_info_type != ELF_INFO_TYPE_EH_FRAME3) | |||
| 755 | return offset; | |||
| 756 | sec_info = elf_section_data (sec)((struct bfd_elf_section_data*)sec->used_by_bfd)->sec_info; | |||
| 757 | ||||
| 758 | if (offset >= sec->_raw_size) | |||
| 759 | return offset - (sec->_cooked_size - sec->_raw_size); | |||
| 760 | ||||
| 761 | lo = 0; | |||
| 762 | hi = sec_info->count; | |||
| 763 | mid = 0; | |||
| 764 | while (lo < hi) | |||
| 765 | { | |||
| 766 | mid = (lo + hi) / 2; | |||
| 767 | if (offset < sec_info->entry[mid].offset) | |||
| 768 | hi = mid; | |||
| 769 | else if (offset | |||
| 770 | >= sec_info->entry[mid].offset + sec_info->entry[mid].size) | |||
| 771 | lo = mid + 1; | |||
| 772 | else | |||
| 773 | break; | |||
| 774 | } | |||
| 775 | ||||
| 776 | BFD_ASSERT (lo < hi){ if (!(lo < hi)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,776); }; | |||
| 777 | ||||
| 778 | /* FDE or CIE was removed. */ | |||
| 779 | if (sec_info->entry[mid].removed) | |||
| 780 | return (bfd_vma) -1; | |||
| 781 | ||||
| 782 | /* If converting to DW_EH_PE_pcrel, there will be no need for run-time | |||
| 783 | relocation against FDE's initial_location field. */ | |||
| 784 | if (sec_info->entry[mid].make_relative | |||
| 785 | && ! sec_info->entry[mid].cie | |||
| 786 | && offset == sec_info->entry[mid].offset + 8) | |||
| 787 | return (bfd_vma) -2; | |||
| 788 | ||||
| 789 | /* If converting LSDA pointers to DW_EH_PE_pcrel, there will be no need | |||
| 790 | for run-time relocation against LSDA field. */ | |||
| 791 | if (sec_info->entry[mid].make_lsda_relative | |||
| 792 | && ! sec_info->entry[mid].cie | |||
| 793 | && (offset == (sec_info->entry[mid].offset + 8 | |||
| 794 | + sec_info->entry[mid].lsda_offset))) | |||
| 795 | return (bfd_vma) -2; | |||
| 796 | ||||
| 797 | return (offset + sec_info->entry[mid].new_offset | |||
| 798 | - sec_info->entry[mid].offset); | |||
| 799 | } | |||
| 800 | ||||
| 801 | /* Write out .eh_frame section. This is called with the relocated | |||
| 802 | contents. */ | |||
| 803 | ||||
| 804 | bfd_boolean | |||
| 805 | _bfd_elf_write_section_eh_frame (bfd *abfd, | |||
| 806 | struct bfd_link_info *info, | |||
| 807 | asection *sec, | |||
| 808 | bfd_byte *contents) | |||
| 809 | { | |||
| 810 | struct eh_frame_sec_info *sec_info; | |||
| 811 | struct elf_link_hash_table *htab; | |||
| 812 | struct eh_frame_hdr_info *hdr_info; | |||
| 813 | unsigned int i; | |||
| 814 | bfd_byte *p, *buf; | |||
| 815 | unsigned int leb128_tmp; | |||
| 816 | unsigned int cie_offset = 0; | |||
| 817 | unsigned int ptr_size; | |||
| 818 | ||||
| 819 | ptr_size = (elf_elfheader (sec->owner)(((sec->owner) -> tdata.elf_obj_data) -> elf_header)->e_ident[EI_CLASS4] | |||
| 820 | == ELFCLASS642) ? 8 : 4; | |||
| 821 | ||||
| 822 | if (sec->sec_info_type != ELF_INFO_TYPE_EH_FRAME3) | |||
| 823 | return bfd_set_section_contents (abfd, sec->output_section, contents, | |||
| 824 | sec->output_offset, sec->_raw_size); | |||
| 825 | sec_info = elf_section_data (sec)((struct bfd_elf_section_data*)sec->used_by_bfd)->sec_info; | |||
| 826 | htab = elf_hash_table (info)((struct elf_link_hash_table *) ((info)->hash)); | |||
| 827 | hdr_info = &htab->eh_info; | |||
| 828 | if (hdr_info->table && hdr_info->array == NULL((void*)0)) | |||
| 829 | hdr_info->array | |||
| 830 | = bfd_malloc (hdr_info->fde_count * sizeof(*hdr_info->array)); | |||
| 831 | if (hdr_info->array == NULL((void*)0)) | |||
| 832 | hdr_info = NULL((void*)0); | |||
| 833 | ||||
| 834 | p = contents; | |||
| 835 | for (i = 0; i < sec_info->count; ++i) | |||
| 836 | { | |||
| 837 | if (sec_info->entry[i].removed) | |||
| 838 | { | |||
| 839 | if (sec_info->entry[i].cie) | |||
| 840 | { | |||
| 841 | /* If CIE is removed due to no remaining FDEs referencing it | |||
| 842 | and there were no CIEs kept before it, sec_info->entry[i].sec | |||
| 843 | will be zero. */ | |||
| 844 | if (sec_info->entry[i].sec == NULL((void*)0)) | |||
| 845 | cie_offset = 0; | |||
| 846 | else | |||
| 847 | { | |||
| 848 | cie_offset = sec_info->entry[i].new_offset; | |||
| 849 | cie_offset += (sec_info->entry[i].sec->output_section->vma | |||
| 850 | + sec_info->entry[i].sec->output_offset | |||
| 851 | - sec->output_section->vma | |||
| 852 | - sec->output_offset); | |||
| 853 | } | |||
| 854 | } | |||
| 855 | continue; | |||
| 856 | } | |||
| 857 | ||||
| 858 | if (sec_info->entry[i].cie) | |||
| 859 | { | |||
| 860 | /* CIE */ | |||
| 861 | cie_offset = sec_info->entry[i].new_offset; | |||
| 862 | if (sec_info->entry[i].make_relative | |||
| 863 | || sec_info->entry[i].make_lsda_relative | |||
| 864 | || sec_info->entry[i].per_encoding_relative) | |||
| 865 | { | |||
| 866 | unsigned char *aug; | |||
| 867 | unsigned int action; | |||
| 868 | unsigned int dummy, per_width, per_encoding; | |||
| 869 | ||||
| 870 | /* Need to find 'R' or 'L' augmentation's argument and modify | |||
| 871 | DW_EH_PE_* value. */ | |||
| 872 | action = (sec_info->entry[i].make_relative ? 1 : 0) | |||
| 873 | | (sec_info->entry[i].make_lsda_relative ? 2 : 0) | |||
| 874 | | (sec_info->entry[i].per_encoding_relative ? 4 : 0); | |||
| 875 | buf = contents + sec_info->entry[i].offset; | |||
| 876 | /* Skip length, id and version. */ | |||
| 877 | buf += 9; | |||
| 878 | aug = buf; | |||
| 879 | buf = strchr (buf, '\0') + 1; | |||
| 880 | read_uleb128 (dummy, buf)do { (dummy) = read_unsigned_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 881 | read_sleb128 (dummy, buf)do { (dummy) = read_signed_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 882 | read_uleb128 (dummy, buf)do { (dummy) = read_unsigned_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 883 | if (*aug == 'z') | |||
| 884 | { | |||
| 885 | read_uleb128 (dummy, buf)do { (dummy) = read_unsigned_leb128 (abfd, buf, &leb128_tmp ); (buf) += leb128_tmp; } while (0); | |||
| 886 | aug++; | |||
| 887 | } | |||
| 888 | ||||
| 889 | while (action) | |||
| 890 | switch (*aug++) | |||
| 891 | { | |||
| 892 | case 'L': | |||
| 893 | if (action & 2) | |||
| 894 | { | |||
| 895 | BFD_ASSERT (*buf == sec_info->entry[i].lsda_encoding){ if (!(*buf == sec_info->entry[i].lsda_encoding)) bfd_assert ("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c",895); }; | |||
| 896 | *buf |= DW_EH_PE_pcrel0x10; | |||
| 897 | action &= ~2; | |||
| 898 | } | |||
| 899 | buf++; | |||
| 900 | break; | |||
| 901 | case 'P': | |||
| 902 | per_encoding = *buf++; | |||
| 903 | per_width = get_DW_EH_PE_width (per_encoding, | |||
| 904 | ptr_size); | |||
| 905 | BFD_ASSERT (per_width != 0){ if (!(per_width != 0)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,905); }; | |||
| 906 | BFD_ASSERT (((per_encoding & 0x70) == DW_EH_PE_pcrel){ if (!(((per_encoding & 0x70) == 0x10) == sec_info->entry [i].per_encoding_relative)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,907); } | |||
| 907 | == sec_info->entry[i].per_encoding_relative){ if (!(((per_encoding & 0x70) == 0x10) == sec_info->entry [i].per_encoding_relative)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,907); }; | |||
| 908 | if ((per_encoding & 0xf0) == DW_EH_PE_aligned0x50) | |||
| 909 | buf = (contents | |||
| 910 | + ((buf - contents + per_width - 1) | |||
| 911 | & ~((bfd_size_type) per_width - 1))); | |||
| 912 | if (action & 4) | |||
| 913 | { | |||
| 914 | bfd_vma value; | |||
| 915 | ||||
| 916 | value = read_value (abfd, buf, per_width, | |||
| 917 | get_DW_EH_PE_signed(((per_encoding) & 0x08) != 0) | |||
| 918 | (per_encoding)(((per_encoding) & 0x08) != 0)); | |||
| 919 | value += (sec_info->entry[i].offset | |||
| 920 | - sec_info->entry[i].new_offset); | |||
| 921 | write_value (abfd, buf, value, per_width); | |||
| 922 | action &= ~4; | |||
| 923 | } | |||
| 924 | buf += per_width; | |||
| 925 | break; | |||
| 926 | case 'R': | |||
| 927 | if (action & 1) | |||
| 928 | { | |||
| 929 | BFD_ASSERT (*buf == sec_info->entry[i].fde_encoding){ if (!(*buf == sec_info->entry[i].fde_encoding)) bfd_assert ("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c",929); }; | |||
| 930 | *buf |= DW_EH_PE_pcrel0x10; | |||
| 931 | action &= ~1; | |||
| 932 | } | |||
| 933 | buf++; | |||
| 934 | break; | |||
| 935 | default: | |||
| 936 | BFD_FAIL (){ bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,936); }; | |||
| 937 | } | |||
| 938 | } | |||
| 939 | } | |||
| 940 | else if (sec_info->entry[i].size > 4) | |||
| 941 | { | |||
| 942 | /* FDE */ | |||
| 943 | bfd_vma value = 0, address; | |||
| 944 | unsigned int width; | |||
| 945 | ||||
| 946 | buf = contents + sec_info->entry[i].offset; | |||
| 947 | /* Skip length. */ | |||
| 948 | buf += 4; | |||
| 949 | bfd_put_32 (abfd,((*((abfd)->xvec->bfd_putx32)) ((sec_info->entry[i]. new_offset + 4 - cie_offset),(buf))) | |||
| 950 | sec_info->entry[i].new_offset + 4 - cie_offset, buf)((*((abfd)->xvec->bfd_putx32)) ((sec_info->entry[i]. new_offset + 4 - cie_offset),(buf))); | |||
| 951 | buf += 4; | |||
| 952 | width = get_DW_EH_PE_width (sec_info->entry[i].fde_encoding, | |||
| 953 | ptr_size); | |||
| 954 | address = value = read_value (abfd, buf, width, | |||
| 955 | get_DW_EH_PE_signed(((sec_info->entry[i].fde_encoding) & 0x08) != 0) | |||
| 956 | (sec_info->entry[i].fde_encoding)(((sec_info->entry[i].fde_encoding) & 0x08) != 0)); | |||
| 957 | if (value) | |||
| 958 | { | |||
| 959 | switch (sec_info->entry[i].fde_encoding & 0xf0) | |||
| 960 | { | |||
| 961 | case DW_EH_PE_indirect0x80: | |||
| 962 | case DW_EH_PE_textrel0x20: | |||
| 963 | BFD_ASSERT (hdr_info == NULL){ if (!(hdr_info == ((void*)0))) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,963); }; | |||
| 964 | break; | |||
| 965 | case DW_EH_PE_datarel0x30: | |||
| 966 | { | |||
| 967 | asection *got = bfd_get_section_by_name (abfd, ".got"); | |||
| 968 | ||||
| 969 | BFD_ASSERT (got != NULL){ if (!(got != ((void*)0))) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,969); }; | |||
| 970 | address += got->vma; | |||
| 971 | } | |||
| 972 | break; | |||
| 973 | case DW_EH_PE_pcrel0x10: | |||
| 974 | value += (sec_info->entry[i].offset | |||
| 975 | - sec_info->entry[i].new_offset); | |||
| 976 | address += (sec->output_section->vma + sec->output_offset | |||
| 977 | + sec_info->entry[i].offset + 8); | |||
| 978 | break; | |||
| 979 | } | |||
| 980 | if (sec_info->entry[i].make_relative) | |||
| 981 | value -= (sec->output_section->vma + sec->output_offset | |||
| 982 | + sec_info->entry[i].new_offset + 8); | |||
| 983 | write_value (abfd, buf, value, width); | |||
| 984 | } | |||
| 985 | ||||
| 986 | if (hdr_info) | |||
| 987 | { | |||
| 988 | hdr_info->array[hdr_info->array_count].initial_loc = address; | |||
| 989 | hdr_info->array[hdr_info->array_count++].fde | |||
| 990 | = (sec->output_section->vma + sec->output_offset | |||
| 991 | + sec_info->entry[i].new_offset); | |||
| 992 | } | |||
| 993 | ||||
| 994 | if ((sec_info->entry[i].lsda_encoding & 0xf0) == DW_EH_PE_pcrel0x10 | |||
| 995 | || sec_info->entry[i].make_lsda_relative) | |||
| 996 | { | |||
| 997 | buf += sec_info->entry[i].lsda_offset; | |||
| 998 | width = get_DW_EH_PE_width (sec_info->entry[i].lsda_encoding, | |||
| 999 | ptr_size); | |||
| 1000 | value = read_value (abfd, buf, width, | |||
| 1001 | get_DW_EH_PE_signed(((sec_info->entry[i].lsda_encoding) & 0x08) != 0) | |||
| 1002 | (sec_info->entry[i].lsda_encoding)(((sec_info->entry[i].lsda_encoding) & 0x08) != 0)); | |||
| 1003 | if (value) | |||
| 1004 | { | |||
| 1005 | if ((sec_info->entry[i].lsda_encoding & 0xf0) | |||
| 1006 | == DW_EH_PE_pcrel0x10) | |||
| 1007 | value += (sec_info->entry[i].offset | |||
| 1008 | - sec_info->entry[i].new_offset); | |||
| 1009 | else if (sec_info->entry[i].make_lsda_relative) | |||
| 1010 | value -= (sec->output_section->vma + sec->output_offset | |||
| 1011 | + sec_info->entry[i].new_offset + 8 | |||
| 1012 | + sec_info->entry[i].lsda_offset); | |||
| 1013 | write_value (abfd, buf, value, width); | |||
| 1014 | } | |||
| 1015 | } | |||
| 1016 | } | |||
| 1017 | else | |||
| 1018 | /* Terminating FDE must be at the end of .eh_frame section only. */ | |||
| 1019 | BFD_ASSERT (i == sec_info->count - 1){ if (!(i == sec_info->count - 1)) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,1019); }; | |||
| 1020 | ||||
| 1021 | BFD_ASSERT (p == contents + sec_info->entry[i].new_offset){ if (!(p == contents + sec_info->entry[i].new_offset)) bfd_assert ("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c",1021); }; | |||
| 1022 | memmove (p, contents + sec_info->entry[i].offset, | |||
| 1023 | sec_info->entry[i].size); | |||
| 1024 | p += sec_info->entry[i].size; | |||
| 1025 | } | |||
| 1026 | ||||
| 1027 | /* FIXME: Once _bfd_elf_discard_section_eh_frame will be able to | |||
| 1028 | shrink sections to zero size, this won't be needed any more. */ | |||
| 1029 | if (p == contents && sec->_cooked_size == 16) | |||
| 1030 | { | |||
| 1031 | bfd_put_32 (abfd, 12, p)((*((abfd)->xvec->bfd_putx32)) ((12),(p))); /* Fake CIE length */ | |||
| 1032 | bfd_put_32 (abfd, 0, p + 4)((*((abfd)->xvec->bfd_putx32)) ((0),(p + 4))); /* Fake CIE id */ | |||
| 1033 | p[8] = 1; /* Fake CIE version */ | |||
| 1034 | memset (p + 9, 0, 7); /* Fake CIE augmentation, 3xleb128 | |||
| 1035 | and 3xDW_CFA_nop as pad */ | |||
| 1036 | p += 16; | |||
| 1037 | } | |||
| 1038 | else | |||
| 1039 | { | |||
| 1040 | unsigned int alignment = 1 << sec->alignment_power; | |||
| 1041 | unsigned int pad = sec->_cooked_size % alignment; | |||
| 1042 | ||||
| 1043 | /* Don't pad beyond the raw size of the output section. It | |||
| 1044 | can happen at the last input section. */ | |||
| 1045 | if (pad | |||
| 1046 | && ((sec->output_offset + sec->_cooked_size + pad) | |||
| 1047 | <= sec->output_section->_raw_size)) | |||
| 1048 | { | |||
| 1049 | /* Find the last CIE/FDE. */ | |||
| 1050 | for (i = sec_info->count - 1; i > 0; i--) | |||
| 1051 | if (! sec_info->entry[i].removed) | |||
| 1052 | break; | |||
| 1053 | ||||
| 1054 | /* The size of the last CIE/FDE must be at least 4. */ | |||
| 1055 | if (sec_info->entry[i].removed | |||
| 1056 | || sec_info->entry[i].size < 4) | |||
| 1057 | abort ()_bfd_abort ("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" , 1057, __PRETTY_FUNCTION__); | |||
| 1058 | ||||
| 1059 | pad = alignment - pad; | |||
| 1060 | ||||
| 1061 | buf = contents + sec_info->entry[i].new_offset; | |||
| 1062 | ||||
| 1063 | /* Update length. */ | |||
| 1064 | sec_info->entry[i].size += pad; | |||
| 1065 | bfd_put_32 (abfd, sec_info->entry[i].size - 4, buf)((*((abfd)->xvec->bfd_putx32)) ((sec_info->entry[i]. size - 4),(buf))); | |||
| 1066 | ||||
| 1067 | /* Pad it with DW_CFA_nop */ | |||
| 1068 | memset (p, 0, pad); | |||
| 1069 | p += pad; | |||
| 1070 | ||||
| 1071 | sec->_cooked_size += pad; | |||
| 1072 | } | |||
| 1073 | } | |||
| 1074 | ||||
| 1075 | BFD_ASSERT ((bfd_size_type) (p - contents) == sec->_cooked_size){ if (!((bfd_size_type) (p - contents) == sec->_cooked_size )) bfd_assert("/usr/src/gnu/usr.bin/binutils/bfd/elf-eh-frame.c" ,1075); }; | |||
| 1076 | ||||
| 1077 | return bfd_set_section_contents (abfd, sec->output_section, | |||
| 1078 | contents, (file_ptr) sec->output_offset, | |||
| 1079 | sec->_cooked_size); | |||
| 1080 | } | |||
| 1081 | ||||
| 1082 | /* Helper function used to sort .eh_frame_hdr search table by increasing | |||
| 1083 | VMA of FDE initial location. */ | |||
| 1084 | ||||
| 1085 | static int | |||
| 1086 | vma_compare (const void *a, const void *b) | |||
| 1087 | { | |||
| 1088 | const struct eh_frame_array_ent *p = a; | |||
| 1089 | const struct eh_frame_array_ent *q = b; | |||
| 1090 | if (p->initial_loc > q->initial_loc) | |||
| 1091 | return 1; | |||
| 1092 | if (p->initial_loc < q->initial_loc) | |||
| 1093 | return -1; | |||
| 1094 | return 0; | |||
| 1095 | } | |||
| 1096 | ||||
| 1097 | /* Write out .eh_frame_hdr section. This must be called after | |||
| 1098 | _bfd_elf_write_section_eh_frame has been called on all input | |||
| 1099 | .eh_frame sections. | |||
| 1100 | .eh_frame_hdr format: | |||
| 1101 | ubyte version (currently 1) | |||
| 1102 | ubyte eh_frame_ptr_enc (DW_EH_PE_* encoding of pointer to start of | |||
| 1103 | .eh_frame section) | |||
| 1104 | ubyte fde_count_enc (DW_EH_PE_* encoding of total FDE count | |||
| 1105 | number (or DW_EH_PE_omit if there is no | |||
| 1106 | binary search table computed)) | |||
| 1107 | ubyte table_enc (DW_EH_PE_* encoding of binary search table, | |||
| 1108 | or DW_EH_PE_omit if not present. | |||
| 1109 | DW_EH_PE_datarel is using address of | |||
| 1110 | .eh_frame_hdr section start as base) | |||
| 1111 | [encoded] eh_frame_ptr (pointer to start of .eh_frame section) | |||
| 1112 | optionally followed by: | |||
| 1113 | [encoded] fde_count (total number of FDEs in .eh_frame section) | |||
| 1114 | fde_count x [encoded] initial_loc, fde | |||
| 1115 | (array of encoded pairs containing | |||
| 1116 | FDE initial_location field and FDE address, | |||
| 1117 | sorted by increasing initial_loc). */ | |||
| 1118 | ||||
| 1119 | bfd_boolean | |||
| 1120 | _bfd_elf_write_section_eh_frame_hdr (bfd *abfd, struct bfd_link_info *info) | |||
| 1121 | { | |||
| 1122 | struct elf_link_hash_table *htab; | |||
| 1123 | struct eh_frame_hdr_info *hdr_info; | |||
| 1124 | asection *sec; | |||
| 1125 | bfd_byte *contents; | |||
| 1126 | asection *eh_frame_sec; | |||
| 1127 | bfd_size_type size; | |||
| 1128 | bfd_boolean retval; | |||
| 1129 | bfd_vma encoded_eh_frame; | |||
| 1130 | ||||
| 1131 | htab = elf_hash_table (info)((struct elf_link_hash_table *) ((info)->hash)); | |||
| 1132 | hdr_info = &htab->eh_info; | |||
| 1133 | sec = hdr_info->hdr_sec; | |||
| 1134 | if (sec == NULL((void*)0)) | |||
| ||||
| 1135 | return TRUE1; | |||
| 1136 | ||||
| 1137 | size = EH_FRAME_HDR_SIZE8; | |||
| 1138 | if (hdr_info->array && hdr_info->array_count == hdr_info->fde_count) | |||
| 1139 | size += 4 + hdr_info->fde_count * 8; | |||
| 1140 | contents = bfd_malloc (size); | |||
| 1141 | if (contents == NULL((void*)0)) | |||
| 1142 | return FALSE0; | |||
| 1143 | ||||
| 1144 | eh_frame_sec = bfd_get_section_by_name (abfd, ".eh_frame"); | |||
| 1145 | if (eh_frame_sec == NULL((void*)0)) | |||
| 1146 | { | |||
| 1147 | free (contents); | |||
| 1148 | return FALSE0; | |||
| 1149 | } | |||
| 1150 | ||||
| 1151 | memset (contents, 0, EH_FRAME_HDR_SIZE8); | |||
| 1152 | contents[0] = 1; /* Version. */ | |||
| 1153 | contents[1] = get_elf_backend_data (abfd)((const struct elf_backend_data *) (abfd)->xvec->backend_data )->elf_backend_encode_eh_address | |||
| 1154 | (abfd, info, eh_frame_sec, 0, sec, 4, | |||
| 1155 | &encoded_eh_frame); /* .eh_frame offset. */ | |||
| 1156 | ||||
| 1157 | if (hdr_info->array
| |||
| 1158 | { | |||
| 1159 | contents[2] = DW_EH_PE_udata40x03; /* FDE count encoding. */ | |||
| 1160 | contents[3] = DW_EH_PE_datarel0x30 | DW_EH_PE_sdata40x0B; /* Search table enc. */ | |||
| 1161 | } | |||
| 1162 | else | |||
| 1163 | { | |||
| 1164 | contents[2] = DW_EH_PE_omit0xff; | |||
| 1165 | contents[3] = DW_EH_PE_omit0xff; | |||
| 1166 | } | |||
| 1167 | bfd_put_32 (abfd, encoded_eh_frame, contents + 4)((*((abfd)->xvec->bfd_putx32)) ((encoded_eh_frame),(contents + 4))); | |||
| 1168 | ||||
| 1169 | if (contents[2] != DW_EH_PE_omit0xff) | |||
| 1170 | { | |||
| 1171 | unsigned int i; | |||
| 1172 | ||||
| 1173 | bfd_put_32 (abfd, hdr_info->fde_count, contents + EH_FRAME_HDR_SIZE)((*((abfd)->xvec->bfd_putx32)) ((hdr_info->fde_count ),(contents + 8))); | |||
| 1174 | qsort (hdr_info->array, hdr_info->fde_count, sizeof (*hdr_info->array), | |||
| 1175 | vma_compare); | |||
| 1176 | for (i = 0; i < hdr_info->fde_count; i++) | |||
| 1177 | { | |||
| 1178 | bfd_put_32 (abfd,((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. initial_loc - sec->output_section->vma),(contents + 8 + i * 8 + 4))) | |||
| ||||
| 1179 | hdr_info->array[i].initial_loc((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. initial_loc - sec->output_section->vma),(contents + 8 + i * 8 + 4))) | |||
| 1180 | - sec->output_section->vma,((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. initial_loc - sec->output_section->vma),(contents + 8 + i * 8 + 4))) | |||
| 1181 | contents + EH_FRAME_HDR_SIZE + i * 8 + 4)((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. initial_loc - sec->output_section->vma),(contents + 8 + i * 8 + 4))); | |||
| 1182 | bfd_put_32 (abfd,((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. fde - sec->output_section->vma),(contents + 8 + i * 8 + 8))) | |||
| 1183 | hdr_info->array[i].fde - sec->output_section->vma,((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. fde - sec->output_section->vma),(contents + 8 + i * 8 + 8))) | |||
| 1184 | contents + EH_FRAME_HDR_SIZE + i * 8 + 8)((*((abfd)->xvec->bfd_putx32)) ((hdr_info->array[i]. fde - sec->output_section->vma),(contents + 8 + i * 8 + 8))); | |||
| 1185 | } | |||
| 1186 | } | |||
| 1187 | ||||
| 1188 | retval = bfd_set_section_contents (abfd, sec->output_section, | |||
| 1189 | contents, (file_ptr) sec->output_offset, | |||
| 1190 | sec->_cooked_size); | |||
| 1191 | free (contents); | |||
| 1192 | return retval; | |||
| 1193 | } | |||
| 1194 | ||||
| 1195 | /* Decide whether we can use a PC-relative encoding within the given | |||
| 1196 | EH frame section. This is the default implementation. */ | |||
| 1197 | ||||
| 1198 | bfd_boolean | |||
| 1199 | _bfd_elf_can_make_relative (bfd *input_bfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 1200 | struct bfd_link_info *info ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 1201 | asection *eh_frame_section ATTRIBUTE_UNUSED__attribute__ ((__unused__))) | |||
| 1202 | { | |||
| 1203 | return TRUE1; | |||
| 1204 | } | |||
| 1205 | ||||
| 1206 | /* Select an encoding for the given address. Preference is given to | |||
| 1207 | PC-relative addressing modes. */ | |||
| 1208 | ||||
| 1209 | bfd_byte | |||
| 1210 | _bfd_elf_encode_eh_address (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 1211 | struct bfd_link_info *info ATTRIBUTE_UNUSED__attribute__ ((__unused__)), | |||
| 1212 | asection *osec, bfd_vma offset, | |||
| 1213 | asection *loc_sec, bfd_vma loc_offset, | |||
| 1214 | bfd_vma *encoded) | |||
| 1215 | { | |||
| 1216 | *encoded = osec->vma + offset - | |||
| 1217 | (loc_sec->output_section->vma + loc_sec->output_offset + loc_offset); | |||
| 1218 | return DW_EH_PE_pcrel0x10 | DW_EH_PE_sdata40x0B; | |||
| 1219 | } |