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77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/* Get specific attribute of abbreviation.
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Copyright (C) 2003, 2004, 2005, 2014 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2003.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <dwarf.h>
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#include "libdwP.h"
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int
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dwarf_getabbrevattr (Dwarf_Abbrev *abbrev, size_t idx, unsigned int *namep,
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unsigned int *formp, Dwarf_Off *offsetp)
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{
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if (abbrev == NULL)
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return -1;
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size_t cnt = 0;
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const unsigned char *attrp = abbrev->attrp;
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const unsigned char *start_attrp;
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unsigned int name;
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unsigned int form;
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do
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{
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start_attrp = attrp;
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/* Attribute code and form are encoded as ULEB128 values.i
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XXX We have no way to bounds check. */
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get_uleb128 (name, attrp, attrp + len_leb128 (name));
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get_uleb128 (form, attrp, attrp + len_leb128 (form));
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/* If both values are zero the index is out of range. */
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if (name == 0 && form == 0)
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return -1;
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}
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while (cnt++ < idx);
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/* Store the result if requested. */
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if (namep != NULL)
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*namep = name;
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if (formp != NULL)
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*formp = form;
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if (offsetp != NULL)
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*offsetp = (start_attrp - abbrev->attrp) + abbrev->offset;
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return 0;
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}
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