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
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/* Do relocations for ELF dynamic linking.
Copyright (C) 1995,96,97,98,99,2000,2001 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 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 RELCOUNT_IDX VERSYMIDX (DT_RELACOUNT)
# define Rel Rela
# define elf_machine_rel elf_machine_rela
# define elf_machine_rel_relative elf_machine_rela_relative
#else
# define RELCOUNT_IDX VERSYMIDX (DT_RELCOUNT)
#endif
#ifndef VERSYMIDX
# define VERSYMIDX(sym) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGIDX (sym))
#endif
/* Perform the relocations in MAP on the running program image as specified
by RELTAG, SZTAG. If LAZY is nonzero, this is the first pass on PLT
relocations; they should be set up to call _dl_runtime_resolve, rather
than fully resolved now. */
static inline void
elf_dynamic_do_rel (struct link_map *map,
ElfW(Addr) reladdr, ElfW(Addr) relsize,
int lazy)
{
const ElfW(Rel) *r = (const void *) reladdr;
const ElfW(Rel) *end = (const void *) (reladdr + relsize);
ElfW(Addr) l_addr = map->l_addr;
if (lazy)
{
/* Doing lazy PLT relocations; they need very little info. */
for (; r < end; ++r)
elf_machine_lazy_rel (map, l_addr, r);
}
else
{
const ElfW(Sym) *const symtab =
(const void *) D_PTR (map, l_info[DT_SYMTAB]);
ElfW(Word) nrelative = (map->l_info[RELCOUNT_IDX] == NULL
? 0 : map->l_info[RELCOUNT_IDX]->d_un.d_val);
const ElfW(Rel) *endrel = r + nrelative;
#ifndef RTLD_BOOTSTRAP
/* This is defined in rtld.c, but nowhere in the static libc.a; make
the reference weak so static programs can still link. This
declaration cannot be done when compiling rtld.c (i.e. #ifdef
RTLD_BOOTSTRAP) because rtld.c contains the common defn for
_dl_rtld_map, which is incompatible with a weak decl in the same
file. */
weak_extern (_dl_rtld_map);
if (map != &_dl_rtld_map) /* Already done in rtld itself. */
#endif
for (; r < endrel; ++r)
elf_machine_rel_relative (l_addr, r,
(void *) (l_addr + r->r_offset));
if (map->l_info[VERSYMIDX (DT_VERSYM)])
{
const ElfW(Half) *const version =
(const void *) D_PTR (map, l_info[VERSYMIDX (DT_VERSYM)]);
for (; r < end; ++r)
{
ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)];
elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
&map->l_versions[ndx],
(void *) (l_addr + r->r_offset));
}
}
else
for (; r < end; ++r)
elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
(void *) (l_addr + r->r_offset));
}
}
#undef elf_dynamic_do_rel
#undef Rel
#undef elf_machine_rel
#undef elf_machine_rel_relative
#undef RELCOUNT_IDX
|
