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 | |
---|
34 | LIBELF_VCSID("$Id$"); |
---|
35 | |
---|
36 | GElf_Sym * |
---|
37 | gelf_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 | |
---|
84 | int |
---|
85 | gelf_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 | } |
---|