1 /* 2 * Copyright (c) 2012, 2013 SAP SE. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 /* 26 * Header file to contain porting-relevant code which does not have a 27 * home anywhere else. 28 * This is intially based on hotspot/src/os/aix/vm/{loadlib,porting}_aix.{hpp,cpp} 29 */ 30 31 /* 32 * Aix' own version of dladdr(). 33 * This function tries to mimick dladdr(3) on Linux 34 * (see http://linux.die.net/man/3/dladdr) 35 * dladdr(3) is not POSIX but a GNU extension, and is not available on AIX. 36 * 37 * Differences between AIX dladdr and Linux dladdr: 38 * 39 * 1) Dl_info.dli_fbase: can never work, is disabled. 40 * A loaded image on AIX is divided in multiple segments, at least two 41 * (text and data) but potentially also far more. This is because the loader may 42 * load each member into an own segment, as for instance happens with the libC.a 43 * 2) Dl_info.dli_sname: This only works for code symbols (functions); for data, a 44 * zero-length string is returned (""). 45 * 3) Dl_info.dli_saddr: For code, this will return the entry point of the function, 46 * not the function descriptor. 47 */ 48 49 typedef struct { 50 const char *dli_fname; /* file path of loaded library */ 51 void *dli_fbase; /* doesn't make sence on AIX */ 52 const char *dli_sname; /* symbol name; "" if not known */ 53 void *dli_saddr; /* address of *entry* of function; not function descriptor; */ 54 } Dl_info; 55 56 #ifdef __cplusplus 57 extern "C" 58 #endif 59 int dladdr(void *addr, Dl_info *info);