1 /*- 2 * Copyright (c) 2007 John Birrell (jb@freebsd.org) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include "_libdwarf.h" 28 29 ELFTC_VCSID("$Id: dwarf_cu.c 2072 2011-10-27 03:26:49Z jkoshy $"); 30 31 int 32 dwarf_next_cu_header_b(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length, 33 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset, 34 Dwarf_Half *cu_pointer_size, Dwarf_Half *cu_offset_size, 35 Dwarf_Half *cu_extension_size, Dwarf_Unsigned *cu_next_offset, 36 Dwarf_Error *error) 37 { 38 Dwarf_CU cu; 39 int ret; 40 41 if (dbg == NULL) { 42 DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT); 43 return (DW_DLV_ERROR); 44 } 45 46 if (dbg->dbg_cu_current == NULL) 47 ret = _dwarf_info_first_cu(dbg, error); 48 else 49 ret = _dwarf_info_next_cu(dbg, error); 50 51 if (ret == DW_DLE_NO_ENTRY) { 52 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 53 return (DW_DLV_NO_ENTRY); 54 } else if (ret != DW_DLE_NONE) 55 return (DW_DLV_ERROR); 56 57 if (dbg->dbg_cu_current == NULL) { 58 DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY); 59 return (DW_DLV_NO_ENTRY); 60 } 61 cu = dbg->dbg_cu_current; 62 63 if (cu_length) 64 *cu_length = cu->cu_length; 65 if (cu_version) 66 *cu_version = cu->cu_version; 67 if (cu_abbrev_offset) 68 *cu_abbrev_offset = (Dwarf_Off) cu->cu_abbrev_offset; 69 if (cu_pointer_size) 70 *cu_pointer_size = cu->cu_pointer_size; 71 if (cu_offset_size) { 72 if (cu->cu_length_size == 4) 73 *cu_offset_size = 4; 74 else 75 *cu_offset_size = 8; 76 } 77 if (cu_extension_size) { 78 if (cu->cu_length_size == 4) 79 *cu_extension_size = 0; 80 else 81 *cu_extension_size = 4; 82 } 83 if (cu_next_offset) 84 *cu_next_offset = dbg->dbg_cu_current->cu_next_offset; 85 86 return (DW_DLV_OK); 87 } 88 89 int 90 dwarf_next_cu_header(Dwarf_Debug dbg, Dwarf_Unsigned *cu_length, 91 Dwarf_Half *cu_version, Dwarf_Off *cu_abbrev_offset, 92 Dwarf_Half *cu_pointer_size, Dwarf_Unsigned *cu_next_offset, 93 Dwarf_Error *error) 94 { 95 96 return (dwarf_next_cu_header_b(dbg, cu_length, cu_version, 97 cu_abbrev_offset, cu_pointer_size, NULL, NULL, cu_next_offset, 98 error)); 99 } 100