1 /*
2 * Copyright (c) 2012, 2018 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #include <stdio.h>
28 #include <sys/ldr.h>
29 #include <errno.h>
30
31 #include "porting_aix.h"
32
33 static unsigned char dladdr_buffer[0x8000];
34
fill_dll_info(void)35 static void fill_dll_info(void) {
36 int rc = loadquery(L_GETINFO,dladdr_buffer, sizeof(dladdr_buffer));
37 if (rc == -1) {
38 fprintf(stderr, "loadquery failed (%d %s)", errno, strerror(errno));
39 fflush(stderr);
40 }
41 }
42
dladdr_dont_reload(void * addr,Dl_info * info)43 static int dladdr_dont_reload(void* addr, Dl_info* info) {
44 const struct ld_info* p = (struct ld_info*) dladdr_buffer;
45 memset((void *)info, 0, sizeof(Dl_info));
46 for (;;) {
47 if (addr >= p->ldinfo_textorg &&
48 addr < p->ldinfo_textorg + p->ldinfo_textsize) {
49 info->dli_fname = p->ldinfo_filename;
50 info->dli_fbase = p->ldinfo_textorg;
51 return 1; /* [sic] */
52 }
53 if (!p->ldinfo_next) {
54 break;
55 }
56 p = (struct ld_info*)(((char*)p) + p->ldinfo_next);
57 }
58 return 0; /* [sic] */
59 }
60
61 #ifdef __cplusplus
62 extern "C"
63 #endif
dladdr(void * addr,Dl_info * info)64 int dladdr(void *addr, Dl_info *info) {
65 static int loaded = 0;
66 if (!loaded) {
67 fill_dll_info();
68 loaded = 1;
69 }
70 if (!addr) {
71 return 0; /* [sic] */
72 }
73 /* Address could be AIX function descriptor? */
74 void* const addr0 = *( (void**) addr );
75 int rc = dladdr_dont_reload(addr, info);
76 if (rc == 0) {
77 rc = dladdr_dont_reload(addr0, info);
78 if (rc == 0) { /* [sic] */
79 fill_dll_info(); /* refill, maybe loadquery info is outdated */
80 rc = dladdr_dont_reload(addr, info);
81 if (rc == 0) {
82 rc = dladdr_dont_reload(addr0, info);
83 }
84 }
85 }
86 return rc;
87 }
88