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95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
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/* Return tag of given DIE.
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Copyright (C) 2003-2011, 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 "libdwP.h"
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Dwarf_Abbrev *
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internal_function
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__libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code)
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{
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Dwarf_Abbrev *abb;
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/* Abbreviation code can never have a value of 0. */
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if (unlikely (code == 0))
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return DWARF_END_ABBREV;
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/* See whether the entry is already in the hash table. */
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abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code, NULL);
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if (abb == NULL)
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while (cu->last_abbrev_offset != (size_t) -1l)
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{
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size_t length;
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/* Find the next entry. It gets automatically added to the
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hash table. */
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abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length,
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NULL);
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if (abb == NULL || abb == DWARF_END_ABBREV)
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{
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/* Make sure we do not try to search for it again. */
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cu->last_abbrev_offset = (size_t) -1l;
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return DWARF_END_ABBREV;
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}
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cu->last_abbrev_offset += length;
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/* Is this the code we are looking for? */
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if (abb->code == code)
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break;
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}
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/* This is our second (or third, etc.) call to __libdw_findabbrev
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and the code is invalid. */
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if (unlikely (abb == NULL))
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abb = DWARF_END_ABBREV;
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return abb;
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}
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int
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dwarf_tag (Dwarf_Die *die)
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{
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/* Find the abbreviation entry. */
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Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL);
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if (unlikely (abbrevp == DWARF_END_ABBREV))
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{
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__libdw_seterrno (DWARF_E_INVALID_DWARF);
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return DW_TAG_invalid;
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}
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return abbrevp->tag;
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}
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INTDEF(dwarf_tag)
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