| /* |
| * Copyright (c) 2016, 2018 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| #include <stdio.h> |
| #include <sys/ldr.h> |
| |
| #include "java_md_aix.h" |
| |
| static unsigned char dladdr_buffer[0x8000]; |
| |
| static int fill_dll_info(void) { |
| return loadquery(L_GETINFO, dladdr_buffer, sizeof(dladdr_buffer)); |
| } |
| |
| static int dladdr_dont_reload(void *addr, Dl_info *info) { |
| const struct ld_info *p = (struct ld_info *)dladdr_buffer; |
| memset((void *)info, 0, sizeof(Dl_info)); |
| for (;;) { |
| if (addr >= p->ldinfo_textorg && |
| addr < p->ldinfo_textorg + p->ldinfo_textsize) { |
| info->dli_fname = p->ldinfo_filename; |
| return 1; |
| } |
| if (!p->ldinfo_next) { |
| break; |
| } |
| p = (struct ld_info *)(((char *)p) + p->ldinfo_next); |
| } |
| return 0; |
| } |
| |
| int dladdr(void *addr, Dl_info *info) { |
| static int loaded = 0; |
| int rc = 0; |
| void *addr0; |
| if (!addr) { |
| return rc; |
| } |
| if (!loaded) { |
| if (fill_dll_info() == -1) |
| return rc; |
| loaded = 1; |
| } |
| |
| // first try with addr on cached data |
| rc = dladdr_dont_reload(addr, info); |
| |
| // addr could be an AIX function descriptor, so try dereferenced version |
| if (rc == 0) { |
| addr0 = *((void **)addr); |
| rc = dladdr_dont_reload(addr0, info); |
| } |
| |
| // if we had no success until now, maybe loadquery info is outdated. |
| // refresh and retry |
| if (rc == 0) { |
| if (fill_dll_info() == -1) |
| return rc; |
| rc = dladdr_dont_reload(addr, info); |
| if (rc == 0) { |
| rc = dladdr_dont_reload(addr0, info); |
| } |
| } |
| return rc; |
| } |