1/* Retrieve ELF descriptor used for DWARF access. 2 Copyright (C) 2002-2005, 2009, 2014, 2015, 2017, 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#ifdef HAVE_CONFIG_H 30# include <config.h> 31#endif 32 33#include <assert.h> 34#include <stddef.h> 35 36#include "libdwP.h" 37 38 39/* The error number. */ 40static __thread int global_error; 41 42 43int 44dwarf_errno (void) 45{ 46 int result = global_error; 47 global_error = DWARF_E_NOERROR; 48 return result; 49} 50INTDEF(dwarf_errno) 51 52 53/* XXX For now we use string pointers. Once the table stablelizes 54 make it more DSO-friendly. */ 55static const char *errmsgs[] = 56 { 57 [DWARF_E_NOERROR] = N_("no error"), 58 [DWARF_E_UNKNOWN_ERROR] = N_("unknown error"), 59 [DWARF_E_INVALID_ACCESS] = N_("invalid access"), 60 [DWARF_E_NO_REGFILE] = N_("no regular file"), 61 [DWARF_E_IO_ERROR] = N_("I/O error"), 62 [DWARF_E_INVALID_ELF] = N_("invalid ELF file"), 63 [DWARF_E_NO_DWARF] = N_("no DWARF information"), 64 [DWARF_E_COMPRESSED_ERROR] = N_("cannot decompress DWARF"), 65 [DWARF_E_NOELF] = N_("no ELF file"), 66 [DWARF_E_GETEHDR_ERROR] = N_("cannot get ELF header"), 67 [DWARF_E_NOMEM] = N_("out of memory"), 68 [DWARF_E_UNIMPL] = N_("not implemented"), 69 [DWARF_E_INVALID_CMD] = N_("invalid command"), 70 [DWARF_E_INVALID_VERSION] = N_("invalid version"), 71 [DWARF_E_INVALID_FILE] = N_("invalid file"), 72 [DWARF_E_NO_ENTRY] = N_("no entries found"), 73 [DWARF_E_INVALID_DWARF] = N_("invalid DWARF"), 74 [DWARF_E_NO_STRING] = N_("no string data"), 75 [DWARF_E_NO_DEBUG_STR] = N_(".debug_str section missing"), 76 [DWARF_E_NO_DEBUG_LINE_STR] = N_(".debug_line_str section missing"), 77 [DWARF_E_NO_STR_OFFSETS] = N_(".debug_str_offsets section missing"), 78 [DWARF_E_NO_ADDR] = N_("no address value"), 79 [DWARF_E_NO_CONSTANT] = N_("no constant value"), 80 [DWARF_E_NO_REFERENCE] = N_("no reference value"), 81 [DWARF_E_INVALID_REFERENCE] = N_("invalid reference value"), 82 [DWARF_E_NO_DEBUG_LINE] = N_(".debug_line section missing"), 83 [DWARF_E_INVALID_DEBUG_LINE] = N_("invalid .debug_line section"), 84 [DWARF_E_TOO_BIG] = N_("debug information too big"), 85 [DWARF_E_VERSION] = N_("invalid DWARF version"), 86 [DWARF_E_INVALID_DIR_IDX] = N_("invalid directory index"), 87 [DWARF_E_ADDR_OUTOFRANGE] = N_("address out of range"), 88 [DWARF_E_NO_DEBUG_LOC] = N_(".debug_loc section missing"), 89 [DWARF_E_NO_DEBUG_LOCLISTS] = N_(".debug_loclists section missing"), 90 [DWARF_E_NO_LOC_VALUE] = N_("not a location list value"), 91 [DWARF_E_NO_BLOCK] = N_("no block data"), 92 [DWARF_E_INVALID_LINE_IDX] = N_("invalid line index"), 93 [DWARF_E_INVALID_ARANGE_IDX] = N_("invalid address range index"), 94 [DWARF_E_NO_MATCH] = N_("no matching address range"), 95 [DWARF_E_NO_FLAG] = N_("no flag value"), 96 [DWARF_E_INVALID_OFFSET] = N_("invalid offset"), 97 [DWARF_E_NO_DEBUG_RANGES] = N_(".debug_ranges section missing"), 98 [DWARF_E_NO_DEBUG_RNGLISTS] = N_(".debug_rnglists section missing"), 99 [DWARF_E_INVALID_CFI] = N_("invalid CFI section"), 100 [DWARF_E_NO_ALT_DEBUGLINK] = N_("no alternative debug link found"), 101 [DWARF_E_INVALID_OPCODE] = N_("invalid opcode"), 102 [DWARF_E_NOT_CUDIE] = N_("not a CU (unit) DIE"), 103 [DWARF_E_UNKNOWN_LANGUAGE] = N_("unknown language code"), 104 [DWARF_E_NO_DEBUG_ADDR] = N_(".debug_addr section missing"), 105 }; 106#define nerrmsgs (sizeof (errmsgs) / sizeof (errmsgs[0])) 107 108 109void 110internal_function 111__libdw_seterrno (int value) 112{ 113 global_error = (value >= 0 && value < (int) nerrmsgs 114 ? value : DWARF_E_UNKNOWN_ERROR); 115} 116 117 118const char * 119dwarf_errmsg (int error) 120{ 121 int last_error = global_error; 122 123 if (error == 0) 124 return last_error != 0 ? _(errmsgs[last_error]) : NULL; 125 else if (error < -1 || error >= (int) nerrmsgs) 126 return _(errmsgs[DWARF_E_UNKNOWN_ERROR]); 127 128 return _(errmsgs[error == -1 ? last_error : error]); 129} 130INTDEF(dwarf_errmsg) 131