source: rtems-tools/linkers/elftoolchain/libelf/gelf_syminfo.c @ ec24a37

4.104.115
Last change on this file since ec24a37 was ec24a37, checked in by Chris Johns <chrisj@…>, on 05/06/12 at 22:47:11

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1/*-
2 * Copyright (c) 2006,2008 Joseph Koshy
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28
29#include <assert.h>
30#include <gelf.h>
31
32#include "_libelf.h"
33
34LIBELF_VCSID("$Id: gelf_syminfo.c 1166 2010-09-04 00:54:36Z jkoshy $");
35
36GElf_Syminfo *
37gelf_getsyminfo(Elf_Data *d, int ndx, GElf_Syminfo *dst)
38{
39        int ec;
40        Elf *e;
41        Elf_Scn *scn;
42        Elf32_Syminfo *syminfo32;
43        Elf64_Syminfo *syminfo64;
44        size_t msz;
45        uint32_t sh_type;
46
47        if (d == NULL || ndx < 0 || dst == NULL ||
48            (scn = d->d_scn) == NULL ||
49            (e = scn->s_elf) == NULL) {
50                LIBELF_SET_ERROR(ARGUMENT, 0);
51                return (NULL);
52        }
53
54        ec = e->e_class;
55        assert(ec == ELFCLASS32 || ec == ELFCLASS64);
56
57        if (ec == ELFCLASS32)
58                sh_type = scn->s_shdr.s_shdr32.sh_type;
59        else
60                sh_type = scn->s_shdr.s_shdr64.sh_type;
61
62        if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
63                LIBELF_SET_ERROR(ARGUMENT, 0);
64                return (NULL);
65        }
66
67        msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
68
69        assert(msz > 0);
70
71        if (msz * ndx >= d->d_size) {
72                LIBELF_SET_ERROR(ARGUMENT, 0);
73                return (NULL);
74        }
75
76        if (ec == ELFCLASS32) {
77
78                syminfo32 = (Elf32_Syminfo *) d->d_buf + ndx;
79
80                dst->si_boundto = syminfo32->si_boundto;
81                dst->si_flags   = syminfo32->si_flags;
82
83        } else {
84
85                syminfo64 = (Elf64_Syminfo *) d->d_buf + ndx;
86
87                *dst = *syminfo64;
88        }
89
90        return (dst);
91}
92
93int
94gelf_update_syminfo(Elf_Data *d, int ndx, GElf_Syminfo *gs)
95{
96        int ec;
97        Elf *e;
98        Elf_Scn *scn;
99        Elf32_Syminfo *syminfo32;
100        Elf64_Syminfo *syminfo64;
101        size_t msz;
102        uint32_t sh_type;
103
104        if (d == NULL || ndx < 0 || gs == NULL ||
105            (scn = d->d_scn) == NULL ||
106            (e = scn->s_elf) == NULL) {
107                LIBELF_SET_ERROR(ARGUMENT, 0);
108                return (0);
109        }
110
111        ec = e->e_class;
112        assert(ec == ELFCLASS32 || ec == ELFCLASS64);
113
114        if (ec == ELFCLASS32)
115                sh_type = scn->s_shdr.s_shdr32.sh_type;
116        else
117                sh_type = scn->s_shdr.s_shdr64.sh_type;
118
119        if (_libelf_xlate_shtype(sh_type) != ELF_T_SYMINFO) {
120                LIBELF_SET_ERROR(ARGUMENT, 0);
121                return (0);
122        }
123
124        msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version);
125        assert(msz > 0);
126
127        if (msz * ndx >= d->d_size) {
128                LIBELF_SET_ERROR(ARGUMENT, 0);
129                return (0);
130        }
131
132        if (ec == ELFCLASS32) {
133                syminfo32 = (Elf32_Syminfo *) d->d_buf + ndx;
134
135                syminfo32->si_boundto  = gs->si_boundto;
136                syminfo32->si_flags  = gs->si_flags;
137
138        } else {
139                syminfo64 = (Elf64_Syminfo *) d->d_buf + ndx;
140
141                *syminfo64 = *gs;
142        }
143
144        return (1);
145}
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