1/* Audit modules for tst-audit24b.
2 Copyright (C) 2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <link.h>
20#include <inttypes.h>
21#include <stdlib.h>
22#include <string.h>
23#include <tst-auditmod24.h>
24
25#define TEST_NAME "tst-audit24b"
26#define TEST_FUNC "tst_audit24b"
27
28#define AUDIT24_COOKIE 0x1
29#define AUDIT24MOD1_COOKIE 0x2
30#define AUDIT24MOD2_COOKIE 0x3
31
32unsigned int
33la_version (unsigned int version)
34{
35 return LAV_CURRENT;
36}
37
38unsigned int
39la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
40{
41 const char *p = strrchr (s: map->l_name, c: '/');
42 const char *l_name = p == NULL ? TEST_NAME : p + 1;
43
44 uintptr_t ck = -1;
45 if (strcmp (s1: l_name, TEST_NAME "mod1.so") == 0)
46 ck = AUDIT24MOD1_COOKIE;
47 else if (strcmp (s1: l_name, TEST_NAME "mod2.so") == 0)
48 ck = AUDIT24MOD2_COOKIE;
49 else if (strcmp (s1: l_name, TEST_NAME) == 0)
50 ck = AUDIT24_COOKIE;
51
52 *cookie = ck;
53 return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
54}
55
56static int
57tst_func1 (void)
58{
59 return 1;
60}
61
62static int
63tst_func2 (void)
64{
65 return 2;
66}
67
68#if __ELF_NATIVE_CLASS == 64
69uintptr_t
70la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
71 uintptr_t *refcook, uintptr_t *defcook,
72 unsigned int *flags, const char *symname)
73#else
74uintptr_t
75la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
76 uintptr_t *refcook, uintptr_t *defcook,
77 unsigned int *flags, const char *symname)
78#endif
79{
80 if (*refcook == AUDIT24_COOKIE)
81 {
82 if (*defcook == AUDIT24MOD1_COOKIE)
83 {
84 if (strcmp (s1: symname, TEST_FUNC "mod1_func1") == 0)
85 return (uintptr_t) tst_func1;
86 else if (strcmp (s1: symname, TEST_FUNC "mod1_func2") == 0)
87 return sym->st_value;
88 abort ();
89 }
90 /* malloc functions. */
91 return sym->st_value;
92 }
93 else if (*refcook == AUDIT24MOD1_COOKIE)
94 {
95 if (*defcook == AUDIT24MOD2_COOKIE
96 && (strcmp (s1: symname, TEST_FUNC "mod2_func1") == 0))
97 {
98 test_symbind_flags (flags: *flags);
99 return (uintptr_t) tst_func2;
100 }
101 }
102
103 abort ();
104}
105

source code of glibc/elf/tst-auditmod24b.c