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
49typedef 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
57extern "C"
58#endif
59int dladdr(void *addr, Dl_info *info);
60