1 /* Provides information and DIEs associated with the Dwarf_CU unit. 2 Copyright (C) 2018 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of either 7 8 * the GNU Lesser General Public License as published by the Free 9 Software Foundation; either version 3 of the License, or (at 10 your option) any later version 11 12 or 13 14 * the GNU General Public License as published by the Free 15 Software Foundation; either version 2 of the License, or (at 16 your option) any later version 17 18 or both in parallel, as here. 19 20 elfutils is distributed in the hope that it will be useful, but 21 WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 General Public License for more details. 24 25 You should have received copies of the GNU General Public License and 26 the GNU Lesser General Public License along with this program. If 27 not, see <http://www.gnu.org/licenses/>. */ 28 29 30 #ifdef HAVE_CONFIG_H 31 # include <config.h> 32 #endif 33 34 #include <string.h> 35 #include "libdwP.h" 36 37 38 int 39 dwarf_cu_info (Dwarf_CU *cu, 40 Dwarf_Half *version, uint8_t *unit_type, 41 Dwarf_Die *cudie, Dwarf_Die *subdie, 42 uint64_t *unit_id, 43 uint8_t *address_size, uint8_t *offset_size) 44 { 45 if (cu == NULL) 46 return -1; 47 48 if (version != NULL) 49 *version = cu->version; 50 51 if (unit_type != NULL) 52 *unit_type = cu->unit_type; 53 54 if (cudie != NULL) 55 { 56 if (cu->version >= 2 && cu->version <= 5 57 && cu->unit_type >= DW_UT_compile 58 && cu->unit_type <= DW_UT_split_type) 59 *cudie = CUDIE (cu); 60 else 61 { 62 invalid: 63 __libdw_seterrno (DWARF_E_INVALID_DWARF); 64 return -1; 65 } 66 } 67 68 if (subdie != NULL) 69 { 70 if (cu->version >= 2 && cu->version <= 5) 71 { 72 /* For types, return the actual type DIE. For skeletons, 73 find the associated split compile unit and return its 74 DIE. */ 75 if (cu->unit_type == DW_UT_type 76 || cu->unit_type == DW_UT_split_type) 77 *subdie = SUBDIE(cu); 78 else if (cu->unit_type == DW_UT_skeleton) 79 { 80 Dwarf_CU *split_cu = __libdw_find_split_unit (cu); 81 if (split_cu != NULL) 82 *subdie = CUDIE(split_cu); 83 else 84 memset (subdie, '\0', sizeof (Dwarf_Die)); 85 } 86 else 87 memset (subdie, '\0', sizeof (Dwarf_Die)); 88 } 89 else 90 goto invalid; 91 } 92 93 if (unit_id != NULL) 94 *unit_id = cu->unit_id8; 95 96 if (address_size != NULL) 97 *address_size = cu->address_size; 98 99 if (offset_size != NULL) 100 *offset_size = cu->offset_size; 101 102 return 0; 103 } 104
