1 /* 2 * Copyright (c) 2012, 2019 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 <string.h> 29 #include <sys/ldr.h> 30 #include <errno.h> 31 32 #include "porting_aix.h" 33 34 static unsigned char dladdr_buffer[0x8000]; 35 36 static void fill_dll_info(void) { 37 int rc = loadquery(L_GETINFO,dladdr_buffer, sizeof(dladdr_buffer)); 38 if (rc == -1) { 39 fprintf(stderr, "loadquery failed (%d %s)", errno, strerror(errno)); 40 fflush(stderr); 41 } 42 } 43 44 static int dladdr_dont_reload(void* addr, Dl_info* info) { 45 const struct ld_info* p = (struct ld_info*) dladdr_buffer; 46 info->dli_fbase = 0; info->dli_fname = 0; 47 info->dli_sname = 0; info->dli_saddr = 0; 48 for (;;) { 49 if (addr >= p->ldinfo_textorg && 50 addr < (((char*)p->ldinfo_textorg) + p->ldinfo_textsize)) { 51 info->dli_fname = p->ldinfo_filename; 52 info->dli_fbase = p->ldinfo_textorg; 53 return 1; /* [sic] */ 54 } 55 if (!p->ldinfo_next) { 56 break; 57 } 58 p = (struct ld_info*)(((char*)p) + p->ldinfo_next); 59 } 60 return 0; /* [sic] */ 61 } 62 63 #ifdef __cplusplus 64 extern "C" 65 #endif 66 int dladdr(void *addr, Dl_info *info) { 67 static int loaded = 0; 68 if (!loaded) { 69 fill_dll_info(); 70 loaded = 1; 71 } 72 if (!addr) { 73 return 0; /* [sic] */ 74 } 75 /* Address could be AIX function descriptor? */ 76 void* const addr0 = *( (void**) addr ); 77 int rc = dladdr_dont_reload(addr, info); 78 if (rc == 0) { 79 rc = dladdr_dont_reload(addr0, info); 80 if (rc == 0) { /* [sic] */ 81 fill_dll_info(); /* refill, maybe loadquery info is outdated */ 82 rc = dladdr_dont_reload(addr, info); 83 if (rc == 0) { 84 rc = dladdr_dont_reload(addr0, info); 85 } 86 } 87 } 88 return rc; 89 }