blob: b271aaae3584a9c0162e5b94c9fc97e2904489b6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
newscn.c - implementation of the elf_newscn(3) function.
Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <private.h>
static Elf_Scn*
_buildscn(Elf *elf, size_t size) {
Elf_Scn *scn;
elf_assert(elf);
elf_assert(size);
elf_assert(_elf_scn_init.s_magic == SCN_MAGIC);
while ((scn = (Elf_Scn*)malloc(sizeof(*scn) + size))) {
*scn = _elf_scn_init;
scn->s_elf = elf;
scn->s_shdr = (char*)(scn + 1);
memset(scn->s_shdr, 0, size);
scn->s_scn_flags = ELF_F_DIRTY;
scn->s_shdr_flags = ELF_F_DIRTY;
scn->s_freeme = 1;
if (elf->e_scn_n) {
scn->s_index = elf->e_scn_n->s_index + 1;
elf->e_scn_n->s_link = scn;
elf->e_scn_n = scn;
return scn;
}
elf_assert(scn->s_index == SHN_UNDEF);
elf->e_scn_1 = elf->e_scn_n = scn;
}
seterr(ERROR_MEM_SCN);
return NULL;
}
Elf_Scn*
elf_newscn(Elf *elf) {
Elf_Scn *scn;
if (!elf) {
return NULL;
}
elf_assert(elf->e_magic == ELF_MAGIC);
if (!elf->e_ehdr && !elf->e_readable) {
seterr(ERROR_NOEHDR);
}
else if (elf->e_kind != ELF_K_ELF) {
seterr(ERROR_NOTELF);
}
else if (elf->e_ehdr || _elf_cook(elf)) {
elf_assert(elf->e_ehdr);
if (elf->e_class == ELFCLASS32) {
if ((scn = _buildscn(elf, sizeof(Elf32_Shdr)))) {
((Elf32_Ehdr*)elf->e_ehdr)->e_shnum = scn->s_index + 1;
elf->e_ehdr_flags |= ELF_F_DIRTY;
return scn;
}
}
else if (valid_class(elf->e_class)) {
seterr(ERROR_UNIMPLEMENTED);
}
else {
seterr(ERROR_UNKNOWN_CLASS);
}
}
return NULL;
}
|
