diff options
Diffstat (limited to 'elfutils/libdwfl/dwfl_build_id_find_debuginfo.c')
| -rw-r--r-- | elfutils/libdwfl/dwfl_build_id_find_debuginfo.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/elfutils/libdwfl/dwfl_build_id_find_debuginfo.c b/elfutils/libdwfl/dwfl_build_id_find_debuginfo.c new file mode 100644 index 00000000..97def072 --- /dev/null +++ b/elfutils/libdwfl/dwfl_build_id_find_debuginfo.c @@ -0,0 +1,92 @@ +/* Find the debuginfo file for a module from its build ID. + Copyright (C) 2007 Red Hat, Inc. + This file is part of Red Hat elfutils. + + Red Hat elfutils is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by the + Free Software Foundation; version 2 of the License. + + Red Hat elfutils 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 for more details. + + You should have received a copy of the GNU General Public License along + with Red Hat elfutils; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. + + In addition, as a special exception, Red Hat, Inc. gives You the + additional right to link the code of Red Hat elfutils with code licensed + under any Open Source Initiative certified open source license + (http://www.opensource.org/licenses/index.php) which requires the + distribution of source code with any binary distribution and to + distribute linked combinations of the two. Non-GPL Code permitted under + this exception must only link to the code of Red Hat elfutils through + those well defined interfaces identified in the file named EXCEPTION + found in the source code files (the "Approved Interfaces"). The files + of Non-GPL Code may instantiate templates or use macros or inline + functions from the Approved Interfaces without causing the resulting + work to be covered by the GNU General Public License. Only Red Hat, + Inc. may make changes or additions to the list of Approved Interfaces. + Red Hat's grant of this exception is conditioned upon your not adding + any new exceptions. If you wish to add a new Approved Interface or + exception, please contact Red Hat. You must obey the GNU General Public + License in all respects for all of the Red Hat elfutils code and other + code used in conjunction with Red Hat elfutils except the Non-GPL Code + covered by this exception. If you modify this file, you may extend this + exception to your version of the file, but you are not obligated to do + so. If you do not wish to provide this exception without modification, + you must delete this exception statement from your version and license + this file solely under the GPL without exception. + + Red Hat elfutils is an included package of the Open Invention Network. + An included package of the Open Invention Network is a package for which + Open Invention Network licensees cross-license their patents. No patent + license is granted, either expressly or impliedly, by designation as an + included package. Should you wish to participate in the Open Invention + Network licensing program, please visit www.openinventionnetwork.com + <http://www.openinventionnetwork.com>. */ + +#include "libdwflP.h" +#include <unistd.h> + + +int +dwfl_build_id_find_debuginfo (Dwfl_Module *mod, + void **userdata __attribute__ ((unused)), + const char *modname __attribute__ ((unused)), + Dwarf_Addr base __attribute__ ((unused)), + const char *file __attribute__ ((unused)), + const char *debuglink __attribute__ ((unused)), + GElf_Word crc __attribute__ ((unused)), + char **debuginfo_file_name) +{ + int fd = -1; + const unsigned char *bits; + GElf_Addr vaddr; + if (INTUSE(dwfl_module_build_id) (mod, &bits, &vaddr) > 0) + fd = __libdwfl_open_by_build_id (mod, true, debuginfo_file_name); + if (fd >= 0) + { + /* We need to open an Elf handle on the file so we can check its + build ID note for validation. Backdoor the handle into the + module data structure since we had to open it early anyway. */ + mod->debug.elf = elf_begin (fd, ELF_C_READ_MMAP_PRIVATE, NULL); + if (likely (__libdwfl_find_build_id (mod, false, mod->debug.elf) == 2)) + /* Also backdoor the gratuitous flag. */ + mod->debug.valid = true; + else + { + /* A mismatch! */ + elf_end (mod->debug.elf); + mod->debug.elf = NULL; + close (fd); + fd = -1; + free (*debuginfo_file_name); + *debuginfo_file_name = NULL; + errno = 0; + } + } + return fd; +} +INTDEF (dwfl_build_id_find_debuginfo) |