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1 : : /* Return DIE at given offset. 2 : : Copyright (C) 2002-2010, 2017 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : Written by Ulrich Drepper <drepper@redhat.com>, 2002. 5 : : 6 : : This file is free software; you can redistribute it and/or modify 7 : : it under the terms of either 8 : : 9 : : * the GNU Lesser General Public License as published by the Free 10 : : Software Foundation; either version 3 of the License, or (at 11 : : your option) any later version 12 : : 13 : : or 14 : : 15 : : * the GNU General Public License as published by the Free 16 : : Software Foundation; either version 2 of the License, or (at 17 : : your option) any later version 18 : : 19 : : or both in parallel, as here. 20 : : 21 : : elfutils is distributed in the hope that it will be useful, but 22 : : WITHOUT ANY WARRANTY; without even the implied warranty of 23 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 : : General Public License for more details. 25 : : 26 : : You should have received copies of the GNU General Public License and 27 : : the GNU Lesser General Public License along with this program. If 28 : : not, see <http://www.gnu.org/licenses/>. */ 29 : : 30 : : #ifdef HAVE_CONFIG_H 31 : : # include <config.h> 32 : : #endif 33 : : 34 : : #include <string.h> 35 : : #include "libdwP.h" 36 : : 37 : : 38 : : Dwarf_Die * 39 : : internal_function 40 : 79032 : __libdw_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result, 41 : : bool debug_types) 42 : : { 43 [ - + ]: 79032 : if (dbg == NULL) 44 : : return NULL; 45 : : 46 : 79032 : Elf_Data *const data = dbg->sectiondata[debug_types ? IDX_debug_types 47 : 79032 : : IDX_debug_info]; 48 [ + - - + ]: 79032 : if (data == NULL || offset >= data->d_size) 49 : : { 50 : 0 : __libdw_seterrno (DWARF_E_INVALID_DWARF); 51 : 0 : return NULL; 52 : : } 53 : : 54 : : /* Clear the entire DIE structure. This signals we have not yet 55 : : determined any of the information. */ 56 : 79032 : memset (result, '\0', sizeof (Dwarf_Die)); 57 : : 58 : 79032 : result->addr = (char *) data->d_buf + offset; 59 : : 60 : : /* Get the CU. */ 61 : 79032 : result->cu = __libdw_findcu (dbg, offset, debug_types); 62 [ - + ]: 79032 : if (result->cu == NULL) 63 : : { 64 : : /* This should never happen. The input file is malformed. */ 65 : 0 : __libdw_seterrno (DWARF_E_INVALID_DWARF); 66 : 0 : result = NULL; 67 : : } 68 : : 69 : : return result; 70 : : } 71 : : 72 : : 73 : : Dwarf_Die * 74 : 56876 : dwarf_offdie (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result) 75 : : { 76 : 56876 : return __libdw_offdie (dbg, offset, result, false); 77 : : } 78 : : INTDEF(dwarf_offdie) 79 : : 80 : : Dwarf_Die * 81 : 24 : dwarf_offdie_types (Dwarf *dbg, Dwarf_Off offset, Dwarf_Die *result) 82 : : { 83 : 24 : return __libdw_offdie (dbg, offset, result, true); 84 : : }