1/* $OpenBSD: test1.c,v 1.3 2017/08/07 16:33:52 bluhm 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 23void *hidden_check = NULL; 24__asm(".hidden hidden_check"); 25 26void *libaa_hidden_val = NULL; 27void *libab_hidden_val = NULL; 28 29int 30main() 31{ 32 void *libaa, *libab; 33 void (*hidden_test)(); 34 35 libaa = dlopen(LIBAA, RTLD_LAZY); 36 libab = dlopen(LIBAB, RTLD_LAZY); 37 if (libaa == NULL) 38 errx(1, "dlopen(%s, RTLD_LAZY) FAILED\n", LIBAA); 39 if (libab == NULL) 40 errx(1, "dlopen(%s, RTLD_LAZY) FAILED\n", LIBAB); 41 42 hidden_test = (void (*)())dlsym(libaa, "test_aa"); 43 if (hidden_test == NULL) 44 errx(1, "dlsym(libaa, \"test_aa\") FAILED\n"); 45 46 (*hidden_test)(); 47 48 hidden_test = (void (*)())dlsym(libab, "test_ab"); 49 if (hidden_test == NULL) 50 errx(1, "dlsym(libab, \"test_ab\") FAILED\n"); 51 52 (*hidden_test)(); 53 54 if (hidden_check != NULL) 55 errx(1, "hidden_check != NULL in main prog\n"); 56 57 if (libaa_hidden_val == NULL || libab_hidden_val == NULL || 58 libaa_hidden_val == libab_hidden_val) 59 errx(1, "incorrect hidden_check detected in libs\n"); 60 61 dlclose(libaa); 62 dlclose(libab); 63 64 return (0); 65} 66