Drop main() prototype. Syncs with NetBSD-8
[minix.git] / external / bsd / elftoolchain / dist / libelf / gelf_dyn.c
blobed836043bd97d469740b4144f5c88395ea9299e8
1 /* $NetBSD: gelf_dyn.c,v 1.2 2014/03/09 16:58:04 christos Exp $ */
3 /*-
4 * Copyright (c) 2006,2008 Joseph Koshy
5 * All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
29 #if HAVE_NBTOOL_CONFIG_H
30 # include "nbtool_config.h"
31 #endif
33 #include <sys/cdefs.h>
35 #include <assert.h>
36 #include <gelf.h>
37 #include <limits.h>
39 #include "_libelf.h"
41 __RCSID("$NetBSD: gelf_dyn.c,v 1.2 2014/03/09 16:58:04 christos Exp $");
42 ELFTC_VCSID("Id: gelf_dyn.c 2272 2011-12-03 17:07:31Z jkoshy ");
44 GElf_Dyn *
45 gelf_getdyn(Elf_Data *ed, int ndx, GElf_Dyn *dst)
47 int ec;
48 Elf *e;
49 size_t msz;
50 Elf_Scn *scn;
51 Elf32_Dyn *dyn32;
52 Elf64_Dyn *dyn64;
53 uint32_t sh_type;
54 struct _Libelf_Data *d;
56 d = (struct _Libelf_Data *) ed;
58 if (d == NULL || ndx < 0 || dst == NULL ||
59 (scn = d->d_scn) == NULL ||
60 (e = scn->s_elf) == NULL) {
61 LIBELF_SET_ERROR(ARGUMENT, 0);
62 return (NULL);
65 ec = e->e_class;
66 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
68 if (ec == ELFCLASS32)
69 sh_type = scn->s_shdr.s_shdr32.sh_type;
70 else
71 sh_type = scn->s_shdr.s_shdr64.sh_type;
73 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
74 LIBELF_SET_ERROR(ARGUMENT, 0);
75 return (NULL);
78 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
80 assert(msz > 0);
82 if (msz * ndx >= d->d_data.d_size) {
83 LIBELF_SET_ERROR(ARGUMENT, 0);
84 return (NULL);
87 if (ec == ELFCLASS32) {
88 dyn32 = (Elf32_Dyn *) d->d_data.d_buf + ndx;
90 dst->d_tag = dyn32->d_tag;
91 dst->d_un.d_val = (Elf64_Xword) dyn32->d_un.d_val;
93 } else {
95 dyn64 = (Elf64_Dyn *) d->d_data.d_buf + ndx;
97 *dst = *dyn64;
100 return (dst);
104 gelf_update_dyn(Elf_Data *ed, int ndx, GElf_Dyn *ds)
106 int ec;
107 Elf *e;
108 size_t msz;
109 Elf_Scn *scn;
110 Elf32_Dyn *dyn32;
111 Elf64_Dyn *dyn64;
112 uint32_t sh_type;
113 struct _Libelf_Data *d;
115 d = (struct _Libelf_Data *) ed;
117 if (d == NULL || ndx < 0 || ds == NULL ||
118 (scn = d->d_scn) == NULL ||
119 (e = scn->s_elf) == NULL) {
120 LIBELF_SET_ERROR(ARGUMENT, 0);
121 return (0);
124 ec = e->e_class;
125 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
127 if (ec == ELFCLASS32)
128 sh_type = scn->s_shdr.s_shdr32.sh_type;
129 else
130 sh_type = scn->s_shdr.s_shdr64.sh_type;
132 if (_libelf_xlate_shtype(sh_type) != ELF_T_DYN) {
133 LIBELF_SET_ERROR(ARGUMENT, 0);
134 return (0);
137 msz = _libelf_msize(ELF_T_DYN, ec, e->e_version);
138 assert(msz > 0);
140 if (msz * ndx >= d->d_data.d_size) {
141 LIBELF_SET_ERROR(ARGUMENT, 0);
142 return (0);
145 if (ec == ELFCLASS32) {
146 dyn32 = (Elf32_Dyn *) d->d_data.d_buf + ndx;
148 LIBELF_COPY_S32(dyn32, ds, d_tag);
149 LIBELF_COPY_U32(dyn32, ds, d_un.d_val);
150 } else {
151 dyn64 = (Elf64_Dyn *) d->d_data.d_buf + ndx;
153 *dyn64 = *ds;
156 return (1);