1/* Audit module for tst-audit24d.
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 AUDIT24_COOKIE 0x0
26#define AUDIT24MOD1_COOKIE 0x1
27#define AUDIT24MOD2_COOKIE 0x2
28#define AUDIT24MOD3_COOKIE 0x3
29#define AUDIT24MOD4_COOKIE 0x4
30
31unsigned int
32la_version (unsigned int version)
33{
34 return LAV_CURRENT;
35}
36
37unsigned int
38la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
39{
40 const char *p = strrchr (s: map->l_name, c: '/');
41 const char *l_name = p == NULL ? "tst-audit24d" : p + 1;
42
43 uintptr_t ck = -1;
44 if (strcmp (s1: l_name, s2: "tst-audit24dmod1.so") == 0)
45 ck = AUDIT24MOD1_COOKIE;
46 else if (strcmp (s1: l_name, s2: "tst-audit24dmod2.so") == 0)
47 ck = AUDIT24MOD2_COOKIE;
48 else if (strcmp (s1: l_name, s2: "tst-audit24dmod3.so") == 0)
49 ck = AUDIT24MOD3_COOKIE;
50 else if (strcmp (s1: l_name, s2: "tst-audit24dmod.so") == 0)
51 ck = AUDIT24MOD4_COOKIE;
52 else if (strcmp (s1: l_name, s2: "tst-audit24d") == 0)
53 ck = AUDIT24_COOKIE;
54
55 *cookie = ck;
56 return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
57}
58
59static int
60tst_audit24dmod1_func1 (void)
61{
62 return 1;
63}
64
65static int
66tst_audit24dmod2_func1 (void)
67{
68 return 10;
69}
70
71static int
72tst_audit24dmod3_func1 (void)
73{
74 return 30;
75}
76
77#include <stdio.h>
78
79#if __ELF_NATIVE_CLASS == 64
80uintptr_t
81la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
82 uintptr_t *refcook, uintptr_t *defcook,
83 unsigned int *flags, const char *symname)
84#else
85uintptr_t
86la_symbind32 (Elf32_Sym *sym, unsigned int ndx,
87 uintptr_t *refcook, uintptr_t *defcook,
88 unsigned int *flags, const char *symname)
89#endif
90{
91 if (*refcook == AUDIT24_COOKIE)
92 {
93 if (*defcook == AUDIT24MOD1_COOKIE)
94 {
95 if (strcmp (s1: symname, s2: "tst_audit24dmod1_func1") == 0)
96 return (uintptr_t) tst_audit24dmod1_func1;
97 else if (strcmp (s1: symname, s2: "tst_audit24dmod1_func2") == 0)
98 return sym->st_value;
99 abort ();
100 }
101 if (*defcook == AUDIT24MOD2_COOKIE
102 && (strcmp (s1: symname, s2: "tst_audit24dmod2_func1") == 0))
103 return (uintptr_t) tst_audit24dmod2_func1;
104
105 /* malloc functions. */
106 return sym->st_value;
107 }
108 else if (*refcook == AUDIT24MOD1_COOKIE)
109 {
110 if (*defcook == AUDIT24MOD3_COOKIE
111 && strcmp (s1: symname, s2: "tst_audit24dmod3_func1") == 0)
112 {
113 test_symbind_flags (flags: *flags);
114
115 return (uintptr_t) tst_audit24dmod3_func1;
116 }
117 }
118
119 if (symname[0] != '\0')
120 abort ();
121 return sym->st_value;
122}
123

source code of glibc/elf/tst-auditmod24d.c