source: rtems-tools/rtemstoolkit/elftoolchain/libelf/gelf_symshndx.c @ 0c5db2d

5
Last change on this file since 0c5db2d was 0c5db2d, checked in by Chris Johns <chrisj@…>, on 04/29/18 at 01:55:37

rtemstoolkit: Update elftoolchain to the latest code.

The update is taken from https://github.com/elftoolchain/elftoolchain.

Update #3417

  • Property mode set to 100644
File size: 3.3 KB
Line 
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("$Id$");
35
36GElf_Sym *
37gelf_getsymshndx(Elf_Data *d, Elf_Data *id, int ndx, GElf_Sym *dst,
38    Elf32_Word *shindex)
39{
40        int ec;
41        Elf *e;
42        Elf_Scn *scn;
43        size_t msz;
44        uint32_t sh_type;
45
46        if (gelf_getsym(d, ndx, dst) == 0)
47                return (NULL);
48
49        if (id == NULL || (scn = id->d_scn) == NULL ||
50            (e = scn->s_elf) == NULL || (e != d->d_scn->s_elf) ||
51            shindex == NULL) {
52                LIBELF_SET_ERROR(ARGUMENT, 0);
53                return (NULL);
54        }
55
56        ec = e->e_class;
57        assert(ec == ELFCLASS32 || ec == ELFCLASS64);
58
59        if (ec == ELFCLASS32)
60                sh_type = scn->s_shdr.s_shdr32.sh_type;
61        else
62                sh_type = scn->s_shdr.s_shdr64.sh_type;
63
64        if (_libelf_xlate_shtype(sh_type) != ELF_T_WORD ||
65           id->d_type != ELF_T_WORD) {
66                LIBELF_SET_ERROR(ARGUMENT, 0);
67                return (NULL);
68        }
69
70        msz = _libelf_msize(ELF_T_WORD, ec, e->e_version);
71
72        assert(msz > 0);
73
74        if (msz * ndx >= id->d_size) {
75                LIBELF_SET_ERROR(ARGUMENT, 0);
76                return (NULL);
77        }
78
79        *shindex = ((Elf32_Word *) id->d_buf)[ndx];
80
81        return (dst);
82}
83
84int
85gelf_update_symshndx(Elf_Data *d, Elf_Data *id, int ndx, GElf_Sym *gs,
86    Elf32_Word xindex)
87{
88        int ec;
89        Elf *e;
90        Elf_Scn *scn;
91        size_t msz;
92        uint32_t sh_type;
93
94        if (gelf_update_sym(d, ndx, gs) == 0)
95                return (0);
96
97        if (id == NULL || (scn = id->d_scn) == NULL ||
98            (e = scn->s_elf) == NULL || (e != d->d_scn->s_elf)) {
99                LIBELF_SET_ERROR(ARGUMENT, 0);
100                return (0);
101        }
102
103        ec = e->e_class;
104        assert(ec == ELFCLASS32 || ec == ELFCLASS64);
105
106        if (ec == ELFCLASS32)
107                sh_type = scn->s_shdr.s_shdr32.sh_type;
108        else
109                sh_type = scn->s_shdr.s_shdr64.sh_type;
110
111        if (_libelf_xlate_shtype(sh_type) != ELF_T_WORD ||
112            d->d_type != ELF_T_WORD) {
113                LIBELF_SET_ERROR(ARGUMENT, 0);
114                return (0);
115        }
116
117        msz = _libelf_msize(ELF_T_WORD, ec, e->e_version);
118        assert(msz > 0);
119
120        if (msz * ndx >= id->d_size) {
121                LIBELF_SET_ERROR(ARGUMENT, 0);
122                return (0);
123        }
124
125        *(((Elf32_Word *) id->d_buf) + ndx) = xindex;
126
127        return (1);
128}
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