1 /* $NetBSD: dwarf_cu.c,v 1.5 2024/03/03 17:37:30 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 John Birrell (jb (at) freebsd.org) 5 * Copyright (c) 2014,2023 Kai Wang 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include "_libdwarf.h" 31 32 __RCSID("$NetBSD: dwarf_cu.c,v 1.5 2024/03/03 17:37:30 christos Exp $"); 33 ELFTC_VCSID("Id: dwarf_cu.c 4013 2023-10-14 22:40:50Z kaiwang27"); 34 35 int 36 dwarf_next_cu_header_d(Dwarf_Debug dbg, Dwarf_Bool is_info, 37 Dwarf_Unsigned *cu_length, Dwarf_Half *cu_version, 38 Dwarf_Off *cu_abbrev_offset, Dwarf_Half *cu_pointer_size, 39 Dwarf_Half *cu_offset_size, Dwarf_Half *cu_extension_size, 40 Dwarf_Sig8 *type_signature, Dwarf_Unsigned *type_offset, 41 Dwarf_Unsigned *cu_next_offset, Dwarf_Half *cu_type, 42 Dwarf_Error *error) 43 { 44 Dwarf_CU cu; 45 int ret; 46 47 if (dbg == NULL) { 48 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); 49 return (DW_DLV_ERROR); 50 } 51 52 if (is_info) { 53 if (dbg->dbg_cu_current == NULL) 54 ret = _dwarf_info_first_cu(dbg, error); 55 else 56 ret = _dwarf_info_next_cu(dbg, error); 57 } else { 58 if (dbg->dbg_tu_current == NULL) 59 ret = _dwarf_info_first_tu(dbg, error); 60 else 61 ret = _dwarf_info_next_tu(dbg, error); 62 } 63 64 if (ret == DW_DLE_NO_ENTRY) { 65 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 66 return (DW_DLV_NO_ENTRY); 67 } else if (ret != DW_DLE_NONE) 68 return (DW_DLV_ERROR); 69 70 if (is_info) { 71 if (dbg->dbg_cu_current == NULL) { 72 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 73 return (DW_DLV_NO_ENTRY); 74 } 75 cu = dbg->dbg_cu_current; 76 } else { 77 if (dbg->dbg_tu_current == NULL) { 78 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 79 return (DW_DLV_NO_ENTRY); 80 } 81 cu = dbg->dbg_tu_current; 82 } 83 84 if (cu_length) 85 *cu_length = cu->cu_length; 86 if (cu_version) 87 *cu_version = cu->cu_version; 88 if (cu_abbrev_offset) 89 *cu_abbrev_offset = (Dwarf_Off) cu->cu_abbrev_offset; 90 if (cu_pointer_size) 91 *cu_pointer_size = cu->cu_pointer_size; 92 if (cu_offset_size) { 93 if (cu->cu_length_size == 4) 94 *cu_offset_size = 4; 95 else 96 *cu_offset_size = 8; 97 } 98 if (cu_extension_size) { 99 if (cu->cu_length_size == 4) 100 *cu_extension_size = 0; 101 else 102 *cu_extension_size = 4; 103 } 104 if (cu_next_offset) 105 *cu_next_offset = cu->cu_next_offset; 106 107 if (!is_info) { 108 if (type_signature) 109 *type_signature = cu->cu_type_sig; 110 if (type_offset) 111 *type_offset = cu->cu_type_offset; 112 } 113 114 if (cu_type) 115 *cu_type = cu->cu_unit_type; 116 117 return (DW_DLV_OK); 118 } 119 120 int 121 dwarf_next_cu_header_c(Dwarf_Debug dbg, Dwarf_Bool is_info, 122 Dwarf_Unsigned *cu_length, Dwarf_Half *cu_version, 123 Dwarf_Off *cu_abbrev_offset, Dwarf_Half *cu_pointer_size, 124 Dwarf_Half *cu_offset_size, Dwarf_Half *cu_extension_size, 125 Dwarf_Sig8 *type_signature, Dwarf_Unsigned *type_offset, 126 Dwarf_Unsigned *cu_next_offset, Dwarf_Error *error) 127 { 128 129 return (dwarf_next_cu_header_d(dbg, 1, cu_length, cu_version, 130 cu_abbrev_offset, cu_pointer_size, cu_offset_size, 131 cu_extension_size, NULL, NULL, cu_next_offset, NULL, error)); 132 } 133 134 135 int 136 dwarf_next_cu_header_b(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length, 137 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset, 138 Dwarf_Half *cu_pointer_size, Dwarf_Half *cu_offset_size, 139 Dwarf_Half *cu_extension_size, Dwarf_Unsigned *cu_next_offset, 140 Dwarf_Error *error) 141 { 142 143 return (dwarf_next_cu_header_c(dbg, 1, cu_length, cu_version, 144 cu_abbrev_offset, cu_pointer_size, cu_offset_size, 145 cu_extension_size, NULL, NULL, cu_next_offset, error)); 146 } 147 148 int 149 dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length, 150 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset, 151 Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset, 152 Dwarf_Error *error) 153 { 154 155 return (dwarf_next_cu_header_b(dbg, cu_length, cu_version, 156 cu_abbrev_offset, cu_pointer_size, NULL, NULL, cu_next_offset, 157 error)); 158 } 159 160 int 161 dwarf_next_types_section(Dwarf_Debug dbg, Dwarf_Error *error) 162 { 163 164 /* Free resource allocated for current .debug_types section. */ 165 _dwarf_type_unit_cleanup(dbg); 166 dbg->dbg_types_loaded = 0; 167 dbg->dbg_types_off = 0; 168 169 /* Reset type unit pointer. */ 170 dbg->dbg_tu_current = NULL; 171 172 /* Search for the next .debug_types section. */ 173 dbg->dbg_types_sec = _dwarf_find_next_types_section(dbg, 174 dbg->dbg_types_sec); 175 176 if (dbg->dbg_types_sec == NULL) { 177 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 178 return (DW_DLV_NO_ENTRY); 179 } 180 181 return (DW_DLV_OK); 182 } 183
Indexes created Sun Mar 01 05:31:48 UTC 2026