File: | src/sys/arch/amd64/stand/boot/../../../../lib/libsa/loadfile.c |
Warning: | line 127, column 7 Although the value stored to 'nr' is used in the enclosing expression, the value is never actually read from 'nr' |
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1 | /* $NetBSD: loadfile.c,v 1.10 2000/12/03 02:53:04 tsutsui Exp $ */ |
2 | /* $OpenBSD: loadfile.c,v 1.21 2021/10/24 17:49:19 deraadt Exp $ */ |
3 | |
4 | /*- |
5 | * Copyright (c) 1997 The NetBSD Foundation, Inc. |
6 | * All rights reserved. |
7 | * |
8 | * This code is derived from software contributed to The NetBSD Foundation |
9 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
10 | * NASA Ames Research Center and by Christos Zoulas. |
11 | * |
12 | * Redistribution and use in source and binary forms, with or without |
13 | * modification, are permitted provided that the following conditions |
14 | * are met: |
15 | * 1. Redistributions of source code must retain the above copyright |
16 | * notice, this list of conditions and the following disclaimer. |
17 | * 2. Redistributions in binary form must reproduce the above copyright |
18 | * notice, this list of conditions and the following disclaimer in the |
19 | * documentation and/or other materials provided with the distribution. |
20 | * |
21 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
23 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
24 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
25 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
31 | * POSSIBILITY OF SUCH DAMAGE. |
32 | */ |
33 | |
34 | /* |
35 | * Copyright (c) 1992, 1993 |
36 | * The Regents of the University of California. All rights reserved. |
37 | * |
38 | * This code is derived from software contributed to Berkeley by |
39 | * Ralph Campbell. |
40 | * |
41 | * Redistribution and use in source and binary forms, with or without |
42 | * modification, are permitted provided that the following conditions |
43 | * are met: |
44 | * 1. Redistributions of source code must retain the above copyright |
45 | * notice, this list of conditions and the following disclaimer. |
46 | * 2. Redistributions in binary form must reproduce the above copyright |
47 | * notice, this list of conditions and the following disclaimer in the |
48 | * documentation and/or other materials provided with the distribution. |
49 | * 3. Neither the name of the University nor the names of its contributors |
50 | * may be used to endorse or promote products derived from this software |
51 | * without specific prior written permission. |
52 | * |
53 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
54 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
55 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
56 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
57 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
58 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
59 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
60 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
61 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
62 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
63 | * SUCH DAMAGE. |
64 | * |
65 | * @(#)boot.c 8.1 (Berkeley) 6/10/93 |
66 | */ |
67 | |
68 | #ifdef _STANDALONE1 |
69 | #include <lib/libkern/libkern.h> |
70 | #include <lib/libsa/stand.h> |
71 | #else |
72 | #include <stdio.h> |
73 | #include <string.h> |
74 | #include <errno.h> |
75 | #include <stdlib.h> |
76 | #include <unistd.h> |
77 | #include <fcntl.h> |
78 | #include <err.h> |
79 | #endif |
80 | |
81 | #include <sys/param.h> |
82 | #include <sys/exec.h> |
83 | |
84 | #include "loadfile.h" |
85 | |
86 | #ifdef BOOT_ELF |
87 | #include <sys/exec_elf.h> |
88 | #if defined(BOOT_ELF32) && defined(BOOT_ELF64) |
89 | /* |
90 | * Both defined, so elf32_exec() and elf64_exec() need to be separately |
91 | * created (can't do it by including loadfile_elf.c here). |
92 | */ |
93 | int elf32_exec(int, Elf32_Ehdr *, uint64_t *, int); |
94 | int elf64_exec(int, Elf64_Ehdr *, uint64_t *, int); |
95 | #else |
96 | #include "loadfile_elf.c" |
97 | #endif |
98 | #endif |
99 | |
100 | /* |
101 | * Open 'filename', read in program and return -1 on error otherwise fd, |
102 | * with file still open. |
103 | * Also fills in marks. |
104 | */ |
105 | int |
106 | loadfile(const char *fname, uint64_t *marks, int flags) |
107 | { |
108 | union { |
109 | #if defined(BOOT_ELF32) || (defined(BOOT_ELF) && ELFSIZE64 == 32) |
110 | Elf32_Ehdr elf32; |
111 | #endif |
112 | #if defined(BOOT_ELF64) || (defined(BOOT_ELF) && ELFSIZE64 == 64) |
113 | Elf64_Ehdr elf64; |
114 | #endif |
115 | |
116 | } hdr; |
117 | ssize_t nr; |
118 | int fd, rval; |
119 | |
120 | /* Open the file. */ |
121 | if ((fd = open(fname, O_RDONLY0x0000)) < 0) { |
122 | WARN(("open %s", fname ? fname : "<default>"))(void)(printf ("open %s", fname ? fname : "<default>"), printf((errno ? ": %s\n" : "\n"), strerror(errno))); |
123 | return -1; |
124 | } |
125 | |
126 | /* Read the exec header. */ |
127 | if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) { |
Although the value stored to 'nr' is used in the enclosing expression, the value is never actually read from 'nr' | |
128 | WARN(("read header"))(void)(printf ("read header"), printf((errno ? ": %s\n" : "\n" ), strerror(errno))); |
129 | goto err; |
130 | } |
131 | |
132 | #if defined(BOOT_ELF32) || (defined(BOOT_ELF) && ELFSIZE64 == 32) |
133 | if (memcmp(hdr.elf32.e_ident, ELFMAG"\177ELF", SELFMAG4) == 0 && |
134 | hdr.elf32.e_ident[EI_CLASS4] == ELFCLASS321) { |
135 | rval = elf32_exec(fd, &hdr.elf32, marks, flags); |
136 | } else |
137 | #endif |
138 | #if defined(BOOT_ELF64) || (defined(BOOT_ELF) && ELFSIZE64 == 64) |
139 | if (memcmp(hdr.elf64.e_ident, ELFMAG"\177ELF", SELFMAG4) == 0 && |
140 | hdr.elf64.e_ident[EI_CLASS4] == ELFCLASS642) { |
141 | rval = elf64_exec(fd, &hdr.elf64, marks, flags); |
142 | } else |
143 | #endif |
144 | { |
145 | rval = 1; |
146 | errno = EFTYPE79; |
147 | WARN(("%s", fname ? fname : "<default>"))(void)(printf ("%s", fname ? fname : "<default>"), printf ((errno ? ": %s\n" : "\n"), strerror(errno))); |
148 | } |
149 | |
150 | if (rval == 0) { |
151 | PROGRESS(("=0x%lx\n", marks[MARK_END] - marks[MARK_START]))(void) printf ("=0x%lx\n", marks[4] - marks[0]); |
152 | return fd; |
153 | } |
154 | err: |
155 | (void)close(fd); |
156 | return -1; |
157 | } |