125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Find the debuginfo file for a module from its build ID. 225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Copyright (C) 2007, 2009 Red Hat, Inc. 325b3c049e70834cf33790a28643ab058b507b35cBen Cheng This file is part of Red Hat elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 625b3c049e70834cf33790a28643ab058b507b35cBen Cheng it under the terms of the GNU General Public License as published by the 725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Free Software Foundation; version 2 of the License. 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 1025b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 1125b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1225b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 1325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1425b3c049e70834cf33790a28643ab058b507b35cBen Cheng You should have received a copy of the GNU General Public License along 1525b3c049e70834cf33790a28643ab058b507b35cBen Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 1625b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 1725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1825b3c049e70834cf33790a28643ab058b507b35cBen Cheng In addition, as a special exception, Red Hat, Inc. gives You the 1925b3c049e70834cf33790a28643ab058b507b35cBen Cheng additional right to link the code of Red Hat elfutils with code licensed 2025b3c049e70834cf33790a28643ab058b507b35cBen Cheng under any Open Source Initiative certified open source license 2125b3c049e70834cf33790a28643ab058b507b35cBen Cheng (http://www.opensource.org/licenses/index.php) which requires the 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribution of source code with any binary distribution and to 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribute linked combinations of the two. Non-GPL Code permitted under 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng this exception must only link to the code of Red Hat elfutils through 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng those well defined interfaces identified in the file named EXCEPTION 2625b3c049e70834cf33790a28643ab058b507b35cBen Cheng found in the source code files (the "Approved Interfaces"). The files 2725b3c049e70834cf33790a28643ab058b507b35cBen Cheng of Non-GPL Code may instantiate templates or use macros or inline 2825b3c049e70834cf33790a28643ab058b507b35cBen Cheng functions from the Approved Interfaces without causing the resulting 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng work to be covered by the GNU General Public License. Only Red Hat, 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc. may make changes or additions to the list of Approved Interfaces. 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat's grant of this exception is conditioned upon your not adding 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng any new exceptions. If you wish to add a new Approved Interface or 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception, please contact Red Hat. You must obey the GNU General Public 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng License in all respects for all of the Red Hat elfutils code and other 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng code used in conjunction with Red Hat elfutils except the Non-GPL Code 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng covered by this exception. If you modify this file, you may extend this 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception to your version of the file, but you are not obligated to do 3825b3c049e70834cf33790a28643ab058b507b35cBen Cheng so. If you do not wish to provide this exception without modification, 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng you must delete this exception statement from your version and license 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng this file solely under the GPL without exception. 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is an included package of the Open Invention Network. 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng An included package of the Open Invention Network is a package for which 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Open Invention Network licensees cross-license their patents. No patent 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng license is granted, either expressly or impliedly, by designation as an 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng included package. Should you wish to participate in the Open Invention 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Network licensing program, please visit www.openinventionnetwork.com 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng <http://www.openinventionnetwork.com>. */ 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libdwflP.h" 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <unistd.h> 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5425b3c049e70834cf33790a28643ab058b507b35cBen Chengint 5525b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_build_id_find_debuginfo (Dwfl_Module *mod, 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng void **userdata __attribute__ ((unused)), 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *modname __attribute__ ((unused)), 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr base __attribute__ ((unused)), 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *file __attribute__ ((unused)), 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *debuglink __attribute__ ((unused)), 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Word crc __attribute__ ((unused)), 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng char **debuginfo_file_name) 6325b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = -1; 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng const unsigned char *bits; 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Addr vaddr; 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (INTUSE(dwfl_module_build_id) (mod, &bits, &vaddr) > 0) 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = __libdwfl_open_by_build_id (mod, true, debuginfo_file_name); 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd >= 0) 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We need to open an Elf handle on the file so we can check its 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng build ID note for validation. Backdoor the handle into the 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng module data structure since we had to open it early anyway. */ 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Error error = __libdw_open_file (&fd, &mod->debug.elf, true, false); 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (error != DWFL_E_NOERROR) 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libdwfl_seterrno (error); 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng else if (likely (__libdwfl_find_build_id (mod, false, 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng mod->debug.elf) == 2)) 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Also backdoor the gratuitous flag. */ 8125b3c049e70834cf33790a28643ab058b507b35cBen Cheng mod->debug.valid = true; 8225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 8325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 8425b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 8525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* A mismatch! */ 8725b3c049e70834cf33790a28643ab058b507b35cBen Cheng elf_end (mod->debug.elf); 8825b3c049e70834cf33790a28643ab058b507b35cBen Cheng mod->debug.elf = NULL; 8925b3c049e70834cf33790a28643ab058b507b35cBen Cheng close (fd); 9025b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = -1; 9125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 9225b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*debuginfo_file_name); 9325b3c049e70834cf33790a28643ab058b507b35cBen Cheng *debuginfo_file_name = NULL; 9425b3c049e70834cf33790a28643ab058b507b35cBen Cheng errno = 0; 9525b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 9625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 9725b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 9825b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_build_id_find_debuginfo) 99