Initial code drop of version 0.153
Change-Id: I97d4765497db839471de6b10aa612bfaca110297
diff --git a/0.153/libdw/dwarf_getattrs.c b/0.153/libdw/dwarf_getattrs.c
new file mode 100644
index 0000000..051dc25
--- /dev/null
+++ b/0.153/libdw/dwarf_getattrs.c
@@ -0,0 +1,146 @@
+/* Get attributes of the DIE.
+ Copyright (C) 2004, 2005, 2008, 2009 Red Hat, Inc.
+ This file is part of Red Hat elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+ 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>. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "libdwP.h"
+
+
+ptrdiff_t
+dwarf_getattrs (Dwarf_Die *die, int (*callback) (Dwarf_Attribute *, void *),
+ void *arg, ptrdiff_t offset)
+{
+ if (die == NULL)
+ return -1l;
+
+ if (unlikely (offset == 1))
+ return 1;
+
+ const unsigned char *die_addr = die->addr;
+
+ /* Get the abbreviation code. */
+ unsigned int u128;
+ get_uleb128 (u128, die_addr);
+
+ if (die->abbrev == NULL)
+ /* Find the abbreviation. */
+ die->abbrev = __libdw_findabbrev (die->cu, u128);
+
+ if (unlikely (die->abbrev == DWARF_END_ABBREV))
+ {
+ invalid_dwarf:
+ __libdw_seterrno (DWARF_E_INVALID_DWARF);
+ return -1l;
+ }
+
+ /* This is where the attributes start. */
+ const unsigned char *attrp = die->abbrev->attrp;
+ const unsigned char *const offset_attrp = die->abbrev->attrp + offset;
+
+ /* Go over the list of attributes. */
+ Dwarf *dbg = die->cu->dbg;
+ while (1)
+ {
+ /* Are we still in bounds? */
+ if (unlikely (attrp
+ >= ((unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf
+ + dbg->sectiondata[IDX_debug_abbrev]->d_size)))
+ goto invalid_dwarf;
+
+ /* Get attribute name and form. */
+ Dwarf_Attribute attr;
+ const unsigned char *remembered_attrp = attrp;
+
+ // XXX Fix bound checks
+ get_uleb128 (attr.code, attrp);
+ get_uleb128 (attr.form, attrp);
+
+ /* We can stop if we found the attribute with value zero. */
+ if (attr.code == 0 && attr.form == 0)
+ /* Do not return 0 here - there would be no way to
+ distinguish this value from the attribute at offset 0.
+ Instead we return +1 which would never be a valid
+ offset of an attribute. */
+ return 1l;
+
+ /* If we are not to OFFSET_ATTRP yet, we just have to skip
+ the values of the intervening attributes. */
+ if (remembered_attrp >= offset_attrp)
+ {
+ /* Fill in the rest. */
+ attr.valp = (unsigned char *) die_addr;
+ attr.cu = die->cu;
+
+ /* Now call the callback function. */
+ if (callback (&attr, arg) != DWARF_CB_OK)
+ /* Return the offset of the start of the attribute, so that
+ dwarf_getattrs() can be restarted from this point if the
+ caller so desires. */
+ return remembered_attrp - die->abbrev->attrp;
+ }
+
+ /* Skip over the rest of this attribute (if there is any). */
+ if (attr.form != 0)
+ {
+ size_t len = __libdw_form_val_len (dbg, die->cu, attr.form,
+ die_addr);
+
+ if (unlikely (len == (size_t) -1l))
+ /* Something wrong with the file. */
+ return -1l;
+
+ // XXX We need better boundary checks.
+ die_addr += len;
+ }
+ }
+ /* NOTREACHED */
+}