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
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/* Audit modules for tst-audit24a.
Copyright (C) 2022 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, see
<https://www.gnu.org/licenses/>. */
#include <link.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <tst-auditmod24.h>
#define AUDIT24_COOKIE 0x1
#define AUDIT24MOD1_COOKIE 0x2
#define AUDIT24MOD2_COOKIE 0x3
#ifndef TEST_NAME
# define TEST_NAME "tst-audit24a"
#endif
#ifndef TEST_MOD
# define TEST_MOD TEST_NAME
#endif
#ifndef TEST_FUNC
# define TEST_FUNC "tst_audit24a"
#endif
unsigned int
la_version (unsigned int version)
{
return LAV_CURRENT;
}
unsigned int
la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
{
const char *p = strrchr (map->l_name, '/');
const char *l_name = p == NULL ? TEST_NAME : p + 1;
uintptr_t ck = -1;
if (strcmp (l_name, TEST_MOD "mod1.so") == 0)
ck = AUDIT24MOD1_COOKIE;
else if (strcmp (l_name, TEST_MOD "mod2.so") == 0)
ck = AUDIT24MOD2_COOKIE;
else if (strcmp (l_name, TEST_NAME) == 0)
ck = AUDIT24_COOKIE;
*cookie = ck;
return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
}
static int
tst_func1 (void)
{
return 1;
}
static int
tst_func2 (void)
{
return 10;
}
#if __ELF_NATIVE_CLASS == 64
uintptr_t
la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
uintptr_t *refcook, uintptr_t *defcook,
unsigned int *flags, const char *symname)
#else
uintptr_t
la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
uintptr_t *refcook, uintptr_t *defcook,
unsigned int *flags, const char *symname)
#endif
{
if (*refcook == AUDIT24_COOKIE)
{
if (*defcook == AUDIT24MOD1_COOKIE)
{
/* Check if bind-now symbols are advertised to not call the PLT
hooks. */
test_symbind_flags (*flags);
if (strcmp (symname, TEST_FUNC "mod1_func1") == 0)
return (uintptr_t) tst_func1;
else if (strcmp (symname, TEST_FUNC "mod1_func2") == 0)
return sym->st_value;
abort ();
}
if (*defcook == AUDIT24MOD2_COOKIE
&& (strcmp (symname, TEST_FUNC "mod2_func1") == 0))
{
test_symbind_flags (*flags);
return (uintptr_t) tst_func2;
}
/* malloc functions. */
return sym->st_value;
}
if (symname[0] != '\0')
abort ();
return sym->st_value;
}
|
