1 /* $NetBSD: gelf_syminfo.c,v 1.4 2022/05/01 19:41:35 jkoshy Exp $ */
2
3 /*-
4 * Copyright (c) 2006,2008 Joseph Koshy
5 * All rights reserved.
6 *
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.
15 *
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.
27 */
28
29 #if HAVE_NBTOOL_CONFIG_H
30 # include "nbtool_config.h"
31 #endif
32
33 #include <sys/cdefs.h>
34
35 #include <assert.h>
36 #include <gelf.h>
37
38 #include "_libelf.h"
39
40 __RCSID("$NetBSD: gelf_syminfo.c,v 1.4 2022/05/01 19:41:35 jkoshy Exp $");
41 ELFTC_VCSID("Id: gelf_syminfo.c 3174 2015-03-27 17:13:41Z emaste");
42
43 GElf_Syminfo *
gelf_getsyminfo(Elf_Data * ed,int ndx,GElf_Syminfo * dst)44 gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst)
45 {
46 int ec;
47 Elf *e;
48 size_t msz;
49 Elf_Scn *scn;
50 uint32_t sh_type;
51 struct _Libelf_Data *d;
52 Elf32_Syminfo *syminfo32;
53 Elf64_Syminfo *syminfo64;
54
55 d = (struct _Libelf_Data *) ed;
56
57 if (d == NULL || ndx < 0 || dst == NULL ||
58 (scn = d->d_scn) == NULL ||
59 (e = scn->s_elf) == NULL) {
60 LIBELF_SET_ERROR(ARGUMENT, 0);
61 return (NULL);
62 }
63
64 ec = e->e_class;
65 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
66
67 if (ec == ELFCLASS32)
68 sh_type = scn->s_shdr.s_shdr32.sh_type;
69 else
70 sh_type = scn->s_shdr.s_shdr64.sh_type;
71
72 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
73 LIBELF_SET_ERROR(ARGUMENT, 0);
74 return (NULL);
75 }
76
77 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
78
79 assert(msz > 0);
80 assert(ndx >= 0);
81
82 if (msz * (size_t) ndx >= d->d_data.d_size) {
83 LIBELF_SET_ERROR(ARGUMENT, 0);
84 return (NULL);
85 }
86
87 if (ec == ELFCLASS32) {
88
89 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
90
91 dst->si_boundto = syminfo32->si_boundto;
92 dst->si_flags = syminfo32->si_flags;
93
94 } else {
95
96 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
97
98 *dst = *syminfo64;
99 }
100
101 return (dst);
102 }
103
104 int
gelf_update_syminfo(Elf_Data * ed,int ndx,GElf_Syminfo * gs)105 gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs)
106 {
107 int ec;
108 Elf *e;
109 size_t msz;
110 Elf_Scn *scn;
111 uint32_t sh_type;
112 struct _Libelf_Data *d;
113 Elf32_Syminfo *syminfo32;
114 Elf64_Syminfo *syminfo64;
115
116 d = (struct _Libelf_Data *) ed;
117
118 if (d == NULL || ndx < 0 || gs == NULL ||
119 (scn = d->d_scn) == NULL ||
120 (e = scn->s_elf) == NULL) {
121 LIBELF_SET_ERROR(ARGUMENT, 0);
122 return (0);
123 }
124
125 ec = e->e_class;
126 assert(ec == ELFCLASS32 || ec == ELFCLASS64);
127
128 if (ec == ELFCLASS32)
129 sh_type = scn->s_shdr.s_shdr32.sh_type;
130 else
131 sh_type = scn->s_shdr.s_shdr64.sh_type;
132
133 if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
134 LIBELF_SET_ERROR(ARGUMENT, 0);
135 return (0);
136 }
137
138 msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
139
140 assert(msz > 0);
141 assert(ndx >= 0);
142
143 if (msz * (size_t) ndx >= d->d_data.d_size) {
144 LIBELF_SET_ERROR(ARGUMENT, 0);
145 return (0);
146 }
147
148 if (ec == ELFCLASS32) {
149 syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;
150
151 syminfo32->si_boundto = gs->si_boundto;
152 syminfo32->si_flags = gs->si_flags;
153
154 } else {
155 syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;
156
157 *syminfo64 = *gs;
158 }
159
160 return (1);
161 }
162