Branch data Line data Source code
1 : : /* Update symbol information in symbol table at the given index.
2 : : Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc.
3 : : This file is part of elfutils.
4 : : Written by Ulrich Drepper <drepper@redhat.com>, 2000.
5 : :
6 : : This file is free software; you can redistribute it and/or modify
7 : : it under the terms of either
8 : :
9 : : * the GNU Lesser General Public License as published by the Free
10 : : Software Foundation; either version 3 of the License, or (at
11 : : your option) any later version
12 : :
13 : : or
14 : :
15 : : * the GNU General Public License as published by the Free
16 : : Software Foundation; either version 2 of the License, or (at
17 : : your option) any later version
18 : :
19 : : or both in parallel, as here.
20 : :
21 : : elfutils is distributed in the hope that it will be useful, but
22 : : WITHOUT ANY WARRANTY; without even the implied warranty of
23 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 : : General Public License for more details.
25 : :
26 : : You should have received copies of the GNU General Public License and
27 : : the GNU Lesser General Public License along with this program. If
28 : : not, see <http://www.gnu.org/licenses/>. */
29 : :
30 : : #ifdef HAVE_CONFIG_H
31 : : # include <config.h>
32 : : #endif
33 : :
34 : : #include <gelf.h>
35 : : #include <stdlib.h>
36 : : #include <string.h>
37 : :
38 : : #include "libelfP.h"
39 : :
40 : :
41 : : int
42 : 91601 : gelf_update_sym (Elf_Data *data, int ndx, GElf_Sym *src)
43 : : {
44 : 91601 : Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
45 : 91601 : Elf_Scn *scn;
46 : 91601 : int result = 0;
47 : :
48 [ + - ]: 91601 : if (data == NULL)
49 : : return 0;
50 : :
51 [ - + ]: 91601 : if (unlikely (data_scn->d.d_type != ELF_T_SYM))
52 : : {
53 : : /* The type of the data better should match. */
54 : 0 : __libelf_seterrno (ELF_E_DATA_MISMATCH);
55 : 0 : return 0;
56 : : }
57 : :
58 : 91601 : scn = data_scn->s;
59 : 91601 : rwlock_wrlock (scn->elf->lock);
60 : :
61 [ + + ]: 91601 : if (scn->elf->class == ELFCLASS32)
62 : : {
63 : 89800 : Elf32_Sym *sym;
64 : :
65 : : /* There is the possibility that the values in the input are
66 : : too large. */
67 [ + - ]: 89800 : if (unlikely (src->st_value > 0xffffffffull)
68 [ - + ]: 89800 : || unlikely (src->st_size > 0xffffffffull))
69 : : {
70 : 0 : __libelf_seterrno (ELF_E_INVALID_DATA);
71 : 0 : goto out;
72 : : }
73 : :
74 : : /* Check whether we have to resize the data buffer. */
75 [ - + ]: 89800 : if (INVALID_NDX (ndx, Elf32_Sym, &data_scn->d))
76 : : {
77 : 0 : __libelf_seterrno (ELF_E_INVALID_INDEX);
78 : 0 : goto out;
79 : : }
80 : :
81 : 89800 : sym = &((Elf32_Sym *) data_scn->d.d_buf)[ndx];
82 : :
83 : : #define COPY(name) \
84 : : sym->name = src->name
85 : 89800 : COPY (st_name);
86 : 89800 : COPY (st_value);
87 : 89800 : COPY (st_size);
88 : : /* Please note that we can simply copy the `st_info' element since
89 : : the definitions of ELFxx_ST_BIND and ELFxx_ST_TYPE are the same
90 : : for the 64 bit variant. */
91 : 89800 : COPY (st_info);
92 : 89800 : COPY (st_other);
93 : 89800 : COPY (st_shndx);
94 : : }
95 : : else
96 : : {
97 : : /* Check whether we have to resize the data buffer. */
98 [ - + ]: 1801 : if (INVALID_NDX (ndx, Elf64_Sym, &data_scn->d))
99 : : {
100 : 0 : __libelf_seterrno (ELF_E_INVALID_INDEX);
101 : 0 : goto out;
102 : : }
103 : :
104 : 1801 : ((Elf64_Sym *) data_scn->d.d_buf)[ndx] = *src;
105 : : }
106 : :
107 : 91601 : result = 1;
108 : :
109 : : /* Mark the section as modified. */
110 : 91601 : scn->flags |= ELF_F_DIRTY;
111 : :
112 : 91601 : out:
113 : 91601 : rwlock_unlock (scn->elf->lock);
114 : :
115 : 91601 : return result;
116 : : }
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