1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1997-2012 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 /* 22 * Glenn Fowler 23 * AT&T Research 24 */ 25 26 #include <ast.h> 27 #include <error.h> 28 #include <dlldefs.h> 29 30 /* 31 * dlsym() with `_' weak fallback 32 */ 33 34 void* 35 dlllook(void* dll, const char* name) 36 { 37 register void* addr; 38 char buf[256]; 39 40 if (!(addr = dlsym(dll, name)) && strlen(name) < (sizeof(buf) - 2)) 41 { 42 buf[0] = '_'; 43 strcpy(buf + 1, name); 44 name = (const char*)buf; 45 addr = dlsym(dll, name); 46 } 47 errorf("dll", NiL, -1, "dlllook: %s addr %p", name, addr); 48 return addr; 49 } 50