1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1997-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 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 <dlldefs.h> 28 29 /* 30 * dlsym() with `_' weak fallback 31 */ 32 33 void* 34 dlllook(void* dll, const char* name) 35 { 36 register void* addr; 37 char buf[256]; 38 39 if (!(addr = dlsym(dll, name)) && strlen(name) < (sizeof(buf) - 2)) 40 { 41 buf[0] = '_'; 42 strcpy(buf + 1, name); 43 addr = dlsym(dll, buf); 44 } 45 return addr; 46 } 47