1 /* $OpenBSD: bb.c,v 1.3 2005/09/28 14:57:10 kurt Exp $ */
2
3 /*
4 * Copyright (c) 2005 Kurt Miller <kurt@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <dlfcn.h>
20 #include <stdio.h>
21
22 int bbSymbol;
23
24 /*
25 * bbTest1 checks dlsym symbol visibility from a single dlopened object
26 * group that looks like libbb -> libcc. This was opened from libaa in
27 * the main object group. So the default search order will be prog2 ->
28 * libaa -> libbb -> libcc. only dlsym(RTLD_DEFAULT,...) should see
29 * symbols in prog2 and libaa. the rest are limited to libbb and libcc.
30 */
31 int
bbTest1(void * libbb)32 bbTest1(void *libbb)
33 {
34 int ret = 0;
35
36 /* check RTLD_DEFAULT can see symbols in main object group */
37 if (dlsym(RTLD_DEFAULT, "mainSymbol") == NULL) {
38 printf("dlsym(RTLD_DEFAULT, \"mainSymbol\") == NULL\n");
39 ret = 1;
40 }
41
42 /* check RTLD_DEFAULT can see symbols in the libbb object group */
43 if (dlsym(RTLD_DEFAULT, "bbSymbol") == NULL) {
44 printf("dlsym(RTLD_DEFAULT, \"bbSymbol\") == NULL\n");
45 ret = 1;
46 }
47
48 /* check RTLD_SELF can *not* see symbols in main object group */
49 if (dlsym(RTLD_SELF, "aaSymbol") != NULL) {
50 printf("dlsym(RTLD_SELF, \"aaSymbol\") != NULL\n");
51 ret = 1;
52 }
53
54 /* check RTLD_NEXT can *not* see symbols in main object group */
55 if (dlsym(RTLD_NEXT, "aaSymbol") != NULL) {
56 printf("dlsym(RTLD_NEXT, \"aaSymbol\") != NULL\n");
57 ret = 1;
58 }
59
60 /* check NULL can *not* see symbols in main object group */
61 if (dlsym(NULL, "aaSymbol") != NULL) {
62 printf("dlsym(NULL, \"aaSymbol\") != NULL\n");
63 ret = 1;
64 }
65
66 /* check RTLD_SELF can see symbols in local object group */
67 if (dlsym(RTLD_SELF, "ccSymbol") == NULL) {
68 printf("dlsym(RTLD_SELF, \"ccSymbol\") == NULL\n");
69 ret = 1;
70 }
71
72 /* check RTLD_NEXT can see symbols in local object group */
73 if (dlsym(RTLD_NEXT, "ccSymbol") == NULL) {
74 printf("dlsym(RTLD_NEXT, \"ccSymbol\") == NULL\n");
75 ret = 1;
76 }
77
78 /* check NULL can see symbols in local object group */
79 if (dlsym(NULL, "ccSymbol") == NULL) {
80 printf("dlsym(NULL, \"ccSymbol\") == NULL\n");
81 ret = 1;
82 }
83
84 /* check RTLD_NEXT skips libbb and can't find bbSymbol */
85 if (dlsym(RTLD_NEXT, "bbSymbol") != NULL) {
86 printf("dlsym(RTLD_NEXT, \"bbSymbol\") != NULL\n");
87 ret = 1;
88 }
89
90 /* check dlsym(libbb,..) can *not* see symbols in libaa */
91 if (dlsym(libbb, "aaSymbol") != NULL) {
92 printf("dlsym(libbb, \"aaSymbol\") != NULL\n");
93 ret = 1;
94 }
95
96 /* check dlsym(libbb,..) can see symbols in libcc */
97 if (dlsym(libbb, "ccSymbol") == NULL) {
98 printf("dlsym(libbb, \"ccSymbol\") == NULL\n");
99 ret = 1;
100 }
101
102 return (ret);
103 }
104