1 /* $OpenBSD: test1.c,v 1.2 2007/08/01 12:53:28 kurt Exp $ */ 2 3 /* 4 * Copyright (c) 2007 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 <err.h> 21 #include <stdio.h> 22 23 void *hidden_check = NULL; 24 __asm(".hidden hidden_check"); 25 26 void *libaa_hidden_val = NULL; 27 void *libab_hidden_val = NULL; 28 29 int 30 main() 31 { 32 void *libaa, *libab; 33 void (*hidden_test)(); 34 int i; 35 36 libaa = dlopen(LIBAA, RTLD_LAZY); 37 libab = dlopen(LIBAB, RTLD_LAZY); 38 if (libaa == NULL) 39 errx(1, "dlopen(%s, RTLD_LAZY) FAILED\n", LIBAA); 40 if (libab == NULL) 41 errx(1, "dlopen(%s, RTLD_LAZY) FAILED\n", LIBAB); 42 43 hidden_test = (void (*)())dlsym(libaa, "test_aa"); 44 if (hidden_test == NULL) 45 errx(1, "dlsym(libaa, \"test_aa\") FAILED\n"); 46 47 (*hidden_test)(); 48 49 hidden_test = (void (*)())dlsym(libab, "test_ab"); 50 if (hidden_test == NULL) 51 errx(1, "dlsym(libab, \"test_ab\") FAILED\n"); 52 53 (*hidden_test)(); 54 55 if (hidden_check != NULL) 56 errx(1, "hidden_check != NULL in main prog\n"); 57 58 if (libaa_hidden_val == NULL || libab_hidden_val == NULL || 59 libaa_hidden_val == libab_hidden_val) 60 errx(1, "incorrect hidden_check detected in libs\n"); 61 62 dlclose(libaa); 63 dlclose(libab); 64 65 return (0); 66 } 67