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
31 unsigned int
la_version(unsigned int version)32 la_version (unsigned int version)
33 {
34 return LAV_CURRENT;
35 }
36
37 unsigned int
la_objopen(struct link_map * map,Lmid_t lmid,uintptr_t * cookie)38 la_objopen (struct link_map *map, Lmid_t lmid, uintptr_t *cookie)
39 {
40 const char *p = strrchr (map->l_name, '/');
41 const char *l_name = p == NULL ? "tst-audit24d" : p + 1;
42
43 uintptr_t ck = -1;
44 if (strcmp (l_name, "tst-audit24dmod1.so") == 0)
45 ck = AUDIT24MOD1_COOKIE;
46 else if (strcmp (l_name, "tst-audit24dmod2.so") == 0)
47 ck = AUDIT24MOD2_COOKIE;
48 else if (strcmp (l_name, "tst-audit24dmod3.so") == 0)
49 ck = AUDIT24MOD3_COOKIE;
50 else if (strcmp (l_name, "tst-audit24dmod.so") == 0)
51 ck = AUDIT24MOD4_COOKIE;
52 else if (strcmp (l_name, "tst-audit24d") == 0)
53 ck = AUDIT24_COOKIE;
54
55 *cookie = ck;
56 return ck == -1 ? 0 : LA_FLG_BINDFROM | LA_FLG_BINDTO;
57 }
58
59 static int
tst_audit24dmod1_func1(void)60 tst_audit24dmod1_func1 (void)
61 {
62 return 1;
63 }
64
65 static int
tst_audit24dmod2_func1(void)66 tst_audit24dmod2_func1 (void)
67 {
68 return 10;
69 }
70
71 static int
tst_audit24dmod3_func1(void)72 tst_audit24dmod3_func1 (void)
73 {
74 return 30;
75 }
76
77 #include <stdio.h>
78
79 #if __ELF_NATIVE_CLASS == 64
80 uintptr_t
la_symbind64(Elf64_Sym * sym,unsigned int ndx,uintptr_t * refcook,uintptr_t * defcook,unsigned int * flags,const char * symname)81 la_symbind64 (Elf64_Sym *sym, unsigned int ndx,
82 uintptr_t *refcook, uintptr_t *defcook,
83 unsigned int *flags, const char *symname)
84 #else
85 uintptr_t
86 la_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 (symname, "tst_audit24dmod1_func1") == 0)
96 return (uintptr_t) tst_audit24dmod1_func1;
97 else if (strcmp (symname, "tst_audit24dmod1_func2") == 0)
98 return sym->st_value;
99 abort ();
100 }
101 if (*defcook == AUDIT24MOD2_COOKIE
102 && (strcmp (symname, "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 (symname, "tst_audit24dmod3_func1") == 0)
112 {
113 test_symbind_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