diff options
Diffstat (limited to 'src/libdw/dwarf_hasattr.c')
| -rw-r--r-- | src/libdw/dwarf_hasattr.c | 102 |
1 files changed, 57 insertions, 45 deletions
diff --git a/src/libdw/dwarf_hasattr.c b/src/libdw/dwarf_hasattr.c index b1c4292a..812c09bc 100644 --- a/src/libdw/dwarf_hasattr.c +++ b/src/libdw/dwarf_hasattr.c @@ -1,52 +1,31 @@ /* Check whether given DIE has specific attribute. - Copyright (C) 2003, 2005 Red Hat, Inc. - This file is part of Red Hat elfutils. + Copyright (C) 2003, 2005, 2014 Red Hat, Inc. + This file is part of elfutils. Written by Ulrich Drepper <drepper@redhat.com>, 2003. - 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. + This file is free software; you can redistribute it and/or modify + it under the terms of either - Red Hat elfutils is distributed in the hope that it will be useful, but + * the GNU Lesser General Public License as published by the Free + Software Foundation; either version 3 of the License, or (at + your option) any later version + + or + + * the GNU General Public License as published by the Free + Software Foundation; either version 2 of the License, or (at + your option) any later version + + or both in parallel, as here. + + 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>. */ + You should have received copies of the GNU General Public License and + the GNU Lesser General Public License along with this program. If + not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H # include <config.h> @@ -64,10 +43,43 @@ dwarf_hasattr (die, search_name) if (die == NULL) return 0; - /* Search for the attribute with the given name. */ - unsigned int code; - (void) __libdw_find_attr (die, search_name, &code, NULL); + /* Find the abbreviation entry. */ + Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL); + if (unlikely (abbrevp == DWARF_END_ABBREV)) + { + invalid_dwarf: + __libdw_seterrno (DWARF_E_INVALID_DWARF); + return 0; + } + + Dwarf *dbg = die->cu->dbg; + + /* Search the name attribute. */ + unsigned char *const endp + = ((unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf + + dbg->sectiondata[IDX_debug_abbrev]->d_size); + + const unsigned char *attrp = abbrevp->attrp; + while (1) + { + /* Are we still in bounds? This test needs to be refined. */ + if (unlikely (attrp >= endp)) + goto invalid_dwarf; + + /* Get attribute name and form. */ + unsigned int attr_name; + get_uleb128 (attr_name, attrp, endp); + unsigned int attr_form; + if (unlikely (attrp >= endp)) + goto invalid_dwarf; + get_uleb128 (attr_form, attrp, endp); + + /* We can stop if we found the attribute with value zero. */ + if (attr_name == 0 || attr_form == 0) + return 0; - return code == search_name; + if (attr_name == search_name) + return 1; + } } INTDEF (dwarf_hasattr) |