| /* Return tag of given DIE. |
| Copyright (C) 2003-2011, 2014 Red Hat, Inc. |
| This file is part of elfutils. |
| Written by Ulrich Drepper <drepper@redhat.com>, 2003. |
| |
| This file is free software; you can redistribute it and/or modify |
| it under the terms of either |
| |
| * 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 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> |
| #endif |
| |
| #include "libdwP.h" |
| |
| |
| Dwarf_Abbrev * |
| internal_function |
| __libdw_findabbrev (struct Dwarf_CU *cu, unsigned int code) |
| { |
| Dwarf_Abbrev *abb; |
| |
| /* Abbreviation code can never have a value of 0. */ |
| if (unlikely (code == 0)) |
| return DWARF_END_ABBREV; |
| |
| /* See whether the entry is already in the hash table. */ |
| abb = Dwarf_Abbrev_Hash_find (&cu->abbrev_hash, code, NULL); |
| if (abb == NULL) |
| while (cu->last_abbrev_offset != (size_t) -1l) |
| { |
| size_t length; |
| |
| /* Find the next entry. It gets automatically added to the |
| hash table. */ |
| abb = __libdw_getabbrev (cu->dbg, cu, cu->last_abbrev_offset, &length, |
| NULL); |
| if (abb == NULL || abb == DWARF_END_ABBREV) |
| { |
| /* Make sure we do not try to search for it again. */ |
| cu->last_abbrev_offset = (size_t) -1l; |
| return DWARF_END_ABBREV; |
| } |
| |
| cu->last_abbrev_offset += length; |
| |
| /* Is this the code we are looking for? */ |
| if (abb->code == code) |
| break; |
| } |
| |
| /* This is our second (or third, etc.) call to __libdw_findabbrev |
| and the code is invalid. */ |
| if (unlikely (abb == NULL)) |
| abb = DWARF_END_ABBREV; |
| |
| return abb; |
| } |
| |
| |
| int |
| dwarf_tag (Dwarf_Die *die) |
| { |
| /* Find the abbreviation entry. */ |
| Dwarf_Abbrev *abbrevp = __libdw_dieabbrev (die, NULL); |
| if (unlikely (abbrevp == DWARF_END_ABBREV)) |
| { |
| __libdw_seterrno (DWARF_E_INVALID_DWARF); |
| return DW_TAG_invalid; |
| } |
| |
| return abbrevp->tag; |
| } |
| INTDEF(dwarf_tag) |