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
|
/* Do relocations for ELF dynamic linking.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C 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.
The GNU C 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 the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/* This file may be included twice, to define both
`elf_dynamic_do_rel' and `elf_dynamic_do_rela'. */
#ifdef DO_RELA
#define elf_dynamic_do_rel elf_dynamic_do_rela
#define Elf32_Rel Elf32_Rela
#define elf_machine_rel elf_machine_rela
#endif
/* Perform the relocations in MAP on the running program image as specified
by RELTAG, SZTAG. *RESOLVE is called to resolve symbol values; it
modifies its argument pointer to point to the defining symbol, and
returns the base load address of the defining object. */
static inline void
elf_dynamic_do_rel (struct link_map *map,
int reltag, int sztag,
Elf32_Addr (*resolve) (const Elf32_Sym **))
{
const Elf32_Sym *const symtab
= (const Elf32_Sym *) map->l_info[DT_SYMTAB]->d_un.d_ptr;
const Elf32_Rel *r = (const Elf32_Rel *) map->l_info[reltag]->d_un.d_ptr;
const Elf32_Rel *end = &r[map->l_info[sztag]->d_un.d_val / sizeof *r];
for (; r < end; ++r)
{
const Elf32_Sym *definer = &symtab[ELF32_R_SYM (r->r_info)];
Elf32_Addr loadbase;
if (ELF32_R_SYM (r->r_info) == STN_UNDEF)
loadbase = 0; /* This value will not be consulted. */
else
{
if (resolve)
loadbase = (*resolve) (&definer);
else
{
assert (definer->st_shndx != SHN_UNDEF);
loadbase = map->l_addr;
}
}
elf_machine_rel (map, r, loadbase, definer);
}
}
#undef elf_dynamic_do_rel
#undef Elf32_Rel
#undef elf_machine_rel
|
