1 // Copyright 2006 Google LLC
2 //
3 // Redistribution and use in source and binary forms, with or without
4 // modification, are permitted provided that the following conditions are
5 // met:
6 //
7 // * Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above
10 // copyright notice, this list of conditions and the following disclaimer
11 // in the documentation and/or other materials provided with the
12 // distribution.
13 // * Neither the name of Google LLC nor the names of its
14 // contributors may be used to endorse or promote products derived from
15 // this software without specific prior written permission.
16 //
17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29 // macho_utilties.cc: Utilities for dealing with mach-o files
30 //
31 // Author: Dave Camp
32
33 #ifdef HAVE_CONFIG_H
34 #include <config.h> // Must come first
35 #endif
36
37 #include "common/mac/byteswap.h"
38 #include "common/mac/macho_utilities.h"
39
40 #include <mach-o/fat.h>
41 #include <mach-o/loader.h>
42
breakpad_swap_uuid_command(struct breakpad_uuid_command * uc)43 void breakpad_swap_uuid_command(struct breakpad_uuid_command *uc) {
44 uc->cmd = ByteSwap(uc->cmd);
45 uc->cmdsize = ByteSwap(uc->cmdsize);
46 }
47
breakpad_swap_load_command(struct load_command * lc)48 void breakpad_swap_load_command(struct load_command *lc) {
49 lc->cmd = ByteSwap(lc->cmd);
50 lc->cmdsize = ByteSwap(lc->cmdsize);
51 }
52
breakpad_swap_dylib_command(struct dylib_command * dc)53 void breakpad_swap_dylib_command(struct dylib_command *dc) {
54 dc->cmd = ByteSwap(dc->cmd);
55 dc->cmdsize = ByteSwap(dc->cmdsize);
56
57 dc->dylib.name.offset = ByteSwap(dc->dylib.name.offset);
58 dc->dylib.timestamp = ByteSwap(dc->dylib.timestamp);
59 dc->dylib.current_version = ByteSwap(dc->dylib.current_version);
60 dc->dylib.compatibility_version = ByteSwap(dc->dylib.compatibility_version);
61 }
62
breakpad_swap_segment_command(struct segment_command * sc)63 void breakpad_swap_segment_command(struct segment_command *sc) {
64 sc->cmd = ByteSwap(sc->cmd);
65 sc->cmdsize = ByteSwap(sc->cmdsize);
66
67 sc->vmaddr = ByteSwap(sc->vmaddr);
68 sc->vmsize = ByteSwap(sc->vmsize);
69 sc->fileoff = ByteSwap(sc->fileoff);
70 sc->filesize = ByteSwap(sc->filesize);
71 sc->maxprot = ByteSwap(sc->maxprot);
72 sc->initprot = ByteSwap(sc->initprot);
73 sc->nsects = ByteSwap(sc->nsects);
74 sc->flags = ByteSwap(sc->flags);
75 }
76
breakpad_swap_segment_command_64(struct segment_command_64 * sg)77 void breakpad_swap_segment_command_64(struct segment_command_64 *sg) {
78 sg->cmd = ByteSwap(sg->cmd);
79 sg->cmdsize = ByteSwap(sg->cmdsize);
80
81 sg->vmaddr = ByteSwap(sg->vmaddr);
82 sg->vmsize = ByteSwap(sg->vmsize);
83 sg->fileoff = ByteSwap(sg->fileoff);
84 sg->filesize = ByteSwap(sg->filesize);
85
86 sg->maxprot = ByteSwap(sg->maxprot);
87 sg->initprot = ByteSwap(sg->initprot);
88 sg->nsects = ByteSwap(sg->nsects);
89 sg->flags = ByteSwap(sg->flags);
90 }
91
breakpad_swap_fat_header(struct fat_header * fh)92 void breakpad_swap_fat_header(struct fat_header *fh) {
93 fh->magic = ByteSwap(fh->magic);
94 fh->nfat_arch = ByteSwap(fh->nfat_arch);
95 }
96
breakpad_swap_fat_arch(struct fat_arch * fa,uint32_t narchs)97 void breakpad_swap_fat_arch(struct fat_arch *fa, uint32_t narchs) {
98 for (uint32_t i = 0; i < narchs; ++i) {
99 fa[i].cputype = ByteSwap(fa[i].cputype);
100 fa[i].cpusubtype = ByteSwap(fa[i].cpusubtype);
101 fa[i].offset = ByteSwap(fa[i].offset);
102 fa[i].size = ByteSwap(fa[i].size);
103 fa[i].align = ByteSwap(fa[i].align);
104 }
105 }
106
breakpad_swap_mach_header(struct mach_header * mh)107 void breakpad_swap_mach_header(struct mach_header *mh) {
108 mh->magic = ByteSwap(mh->magic);
109 mh->cputype = ByteSwap(mh->cputype);
110 mh->cpusubtype = ByteSwap(mh->cpusubtype);
111 mh->filetype = ByteSwap(mh->filetype);
112 mh->ncmds = ByteSwap(mh->ncmds);
113 mh->sizeofcmds = ByteSwap(mh->sizeofcmds);
114 mh->flags = ByteSwap(mh->flags);
115 }
116
breakpad_swap_mach_header_64(struct mach_header_64 * mh)117 void breakpad_swap_mach_header_64(struct mach_header_64 *mh) {
118 mh->magic = ByteSwap(mh->magic);
119 mh->cputype = ByteSwap(mh->cputype);
120 mh->cpusubtype = ByteSwap(mh->cpusubtype);
121 mh->filetype = ByteSwap(mh->filetype);
122 mh->ncmds = ByteSwap(mh->ncmds);
123 mh->sizeofcmds = ByteSwap(mh->sizeofcmds);
124 mh->flags = ByteSwap(mh->flags);
125 mh->reserved = ByteSwap(mh->reserved);
126 }
127
breakpad_swap_section(struct section * s,uint32_t nsects)128 void breakpad_swap_section(struct section *s,
129 uint32_t nsects) {
130 for (uint32_t i = 0; i < nsects; i++) {
131 s[i].addr = ByteSwap(s[i].addr);
132 s[i].size = ByteSwap(s[i].size);
133
134 s[i].offset = ByteSwap(s[i].offset);
135 s[i].align = ByteSwap(s[i].align);
136 s[i].reloff = ByteSwap(s[i].reloff);
137 s[i].nreloc = ByteSwap(s[i].nreloc);
138 s[i].flags = ByteSwap(s[i].flags);
139 s[i].reserved1 = ByteSwap(s[i].reserved1);
140 s[i].reserved2 = ByteSwap(s[i].reserved2);
141 }
142 }
143
breakpad_swap_section_64(struct section_64 * s,uint32_t nsects)144 void breakpad_swap_section_64(struct section_64 *s,
145 uint32_t nsects) {
146 for (uint32_t i = 0; i < nsects; i++) {
147 s[i].addr = ByteSwap(s[i].addr);
148 s[i].size = ByteSwap(s[i].size);
149
150 s[i].offset = ByteSwap(s[i].offset);
151 s[i].align = ByteSwap(s[i].align);
152 s[i].reloff = ByteSwap(s[i].reloff);
153 s[i].nreloc = ByteSwap(s[i].nreloc);
154 s[i].flags = ByteSwap(s[i].flags);
155 s[i].reserved1 = ByteSwap(s[i].reserved1);
156 s[i].reserved2 = ByteSwap(s[i].reserved2);
157 }
158 }
159