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 #include <stdio.h> 26 #include <sys/ldr.h> 27 #include <errno.h> 28 29 #include "porting_aix.h" 30 31 static unsigned char dladdr_buffer[0x4000]; 32 33 static void fill_dll_info(void) { 34 int rc = loadquery(L_GETINFO,dladdr_buffer, sizeof(dladdr_buffer)); 35 if (rc == -1) { 36 fprintf(stderr, "loadquery failed (%d %s)", errno, strerror(errno)); 37 fflush(stderr); 38 } 39 } 40 41 static int dladdr_dont_reload(void* addr, Dl_info* info) { 42 const struct ld_info* p = (struct ld_info*) dladdr_buffer; 43 info->dli_fbase = 0; info->dli_fname = 0; 44 info->dli_sname = 0; info->dli_saddr = 0; 45 for (;;) { 46 if (addr >= p->ldinfo_textorg && 47 addr < (((char*)p->ldinfo_textorg) + p->ldinfo_textsize)) { 48 info->dli_fname = p->ldinfo_filename; 49 info->dli_fbase = p->ldinfo_textorg; 50 return 1; /* [sic] */ 51 } 52 if (!p->ldinfo_next) { 53 break; 54 } 55 p = (struct ld_info*)(((char*)p) + p->ldinfo_next); 56 } 57 return 0; /* [sic] */ 58 } 59 60 #ifdef __cplusplus 61 extern "C" 62 #endif 63 int dladdr(void *addr, Dl_info *info) { 64 static int loaded = 0; 65 if (!loaded) { 66 fill_dll_info(); 67 loaded = 1; 68 } 69 if (!addr) { 70 return 0; /* [sic] */ 71 } 72 /* Address could be AIX function descriptor? */ 73 void* const addr0 = *( (void**) addr ); 74 int rc = dladdr_dont_reload(addr, info); 75 if (rc == 0) { 76 rc = dladdr_dont_reload(addr0, info); 77 if (rc == 0) { /* [sic] */ 78 fill_dll_info(); /* refill, maybe loadquery info is outdated */ 79 rc = dladdr_dont_reload(addr, info); 80 if (rc == 0) { 81 rc = dladdr_dont_reload(addr0, info); 82 } 83 } 84 } 85 return rc; 86 }