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 memset((void *)info, 0, sizeof(Dl_info)); 47 for (;;) { 48 if (addr >= p->ldinfo_textorg && 49 addr < p->ldinfo_textorg + p->ldinfo_textsize) { 50 info->dli_fname = p->ldinfo_filename; 51 info->dli_fbase = p->ldinfo_textorg; 52 return 1; /* [sic] */ 53 } 54 if (!p->ldinfo_next) { 55 break; 56 } 57 p = (struct ld_info*)(((char*)p) + p->ldinfo_next); 58 } 59 return 0; /* [sic] */ 60 } 61 62 #ifdef __cplusplus 63 extern "C" 64 #endif 65 int dladdr(void *addr, Dl_info *info) { 66 static int loaded = 0; 67 if (!loaded) { 68 fill_dll_info(); 69 loaded = 1; 70 } 71 if (!addr) { 72 return 0; /* [sic] */ 73 } 74 /* Address could be AIX function descriptor? */ 75 void* const addr0 = *( (void**) addr ); 76 int rc = dladdr_dont_reload(addr, info); 77 if (rc == 0) { 78 rc = dladdr_dont_reload(addr0, info); 79 if (rc == 0) { /* [sic] */ 80 fill_dll_info(); /* refill, maybe loadquery info is outdated */ 81 rc = dladdr_dont_reload(addr, info); 82 if (rc == 0) { 83 rc = dladdr_dont_reload(addr0, info); 84 } 85 } 86 } 87 return rc; 88 }