1b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper/* Error handling in libdwfl. 2d26aea9da7d618de41c797da405637dd67733956Roland McGrath Copyright (C) 2005-2015 Red Hat, Inc. 3de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is part of elfutils. 4b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 5de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is free software; you can redistribute it and/or modify 6de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard it under the terms of either 7b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 8de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU Lesser General Public License as published by the Free 9de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 3 of the License, or (at 10de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 11de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 12de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or 13de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 14de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU General Public License as published by the Free 15de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 2 of the License, or (at 16de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 17de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 18de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or both in parallel, as here. 19de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 20de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard elfutils is distributed in the hope that it will be useful, but 21361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper WITHOUT ANY WARRANTY; without even the implied warranty of 22361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper General Public License for more details. 24361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper 25de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard You should have received copies of the GNU General Public License and 26de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard the GNU Lesser General Public License along with this program. If 27de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard not, see <http://www.gnu.org/licenses/>. */ 28b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 29b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#ifdef HAVE_CONFIG_H 30b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper# include <config.h> 31b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#endif 32b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 33b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <assert.h> 34b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <libintl.h> 35b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <stdbool.h> 36b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <stdint.h> 37b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <stdlib.h> 38b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <errno.h> 39b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 40b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include "libdwflP.h" 41b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 42b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 43b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper/* The error number. */ 44b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperstatic __thread int global_error; 45b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 46b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 47b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperint 48b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperdwfl_errno (void) 49b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 507e678fa3f6051f7ef24b4610c9a66cab858b6b6eUlrich Drepper int result = global_error; 51b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper global_error = DWFL_E_NOERROR; 52b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return result; 53b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 54ed431ddb74331f24add8c6d932ebed129c4385d8Roland McGrathINTDEF (dwfl_errno) 55b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 56b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 57d26aea9da7d618de41c797da405637dd67733956Roland McGrathstruct msgtable 58b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 59b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define DWFL_ERROR(name, text) char msg_##name[sizeof text]; 60b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper DWFL_ERRORS 61b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#undef DWFL_ERROR 62d26aea9da7d618de41c797da405637dd67733956Roland McGrath}; 63d26aea9da7d618de41c797da405637dd67733956Roland McGrath 64d26aea9da7d618de41c797da405637dd67733956Roland McGrathstatic const union 65d26aea9da7d618de41c797da405637dd67733956Roland McGrath{ 66d26aea9da7d618de41c797da405637dd67733956Roland McGrath struct msgtable table; 67d26aea9da7d618de41c797da405637dd67733956Roland McGrath char strings[ 68d26aea9da7d618de41c797da405637dd67733956Roland McGrath#define DWFL_ERROR(name, text) + sizeof text 69d26aea9da7d618de41c797da405637dd67733956Roland McGrath DWFL_ERRORS 70d26aea9da7d618de41c797da405637dd67733956Roland McGrath#undef DWFL_ERROR 71d26aea9da7d618de41c797da405637dd67733956Roland McGrath ]; 72b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} msgtable = 73b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 74d26aea9da7d618de41c797da405637dd67733956Roland McGrath .table = 75d26aea9da7d618de41c797da405637dd67733956Roland McGrath { 76b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define DWFL_ERROR(name, text) text, 77d26aea9da7d618de41c797da405637dd67733956Roland McGrath DWFL_ERRORS 78b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#undef DWFL_ERROR 79d26aea9da7d618de41c797da405637dd67733956Roland McGrath } 80b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper }; 81d26aea9da7d618de41c797da405637dd67733956Roland McGrath#define msgstr (msgtable.strings) 82b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 83b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperstatic const uint_fast16_t msgidx[] = 84b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 85b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define DWFL_ERROR(name, text) \ 86b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper [DWFL_E_##name] = offsetof (struct msgtable, msg_##name), 87b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper DWFL_ERRORS 88b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#undef DWFL_ERROR 89b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper}; 90b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#define nmsgidx (sizeof msgidx / sizeof msgidx[0]) 91b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 92b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 93b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperstatic inline int 94b08d5a8fb42f4586d756068065186b5af7e48daUlrich Dreppercanonicalize (Dwfl_Error error) 95b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 96b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper unsigned int value; 97b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 98b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper switch (error) 99b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 100b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper default: 101b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper value = error; 102b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if ((value &~ 0xffff) != 0) 103b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 104b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper assert (value < nmsgidx); 105b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 106b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case DWFL_E_ERRNO: 107b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper value = DWFL_E (ERRNO, errno); 108b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 109b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case DWFL_E_LIBELF: 110b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper value = DWFL_E (LIBELF, elf_errno ()); 111b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 112b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case DWFL_E_LIBDW: 1134959bf89d92b59ba72bea5786d7b3f9b5564f750Roland McGrath value = DWFL_E (LIBDW, INTUSE(dwarf_errno) ()); 114b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 115b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#if 0 116b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper DWFL_E_LIBEBL: 117b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper value = DWFL_E (LIBEBL, ebl_errno ()); 118b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper break; 119b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#endif 120b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 121b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 122b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return value; 123b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 124b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 125b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperint 126077c65f3be02e5d01b0c4dea3f6c854077d156fcUlrich Drepperinternal_function 127b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper__libdwfl_canon_error (Dwfl_Error error) 128b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 129b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return canonicalize (error); 130b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 131b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 132b08d5a8fb42f4586d756068065186b5af7e48daUlrich Dreppervoid 133077c65f3be02e5d01b0c4dea3f6c854077d156fcUlrich Drepperinternal_function 134b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper__libdwfl_seterrno (Dwfl_Error error) 135b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 1367e678fa3f6051f7ef24b4610c9a66cab858b6b6eUlrich Drepper global_error = canonicalize (error); 137b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 138b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 139b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 140b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperconst char * 1411ccdfb683ad6c7e59793136c3a657ddf131cafd1Mark Wielaarddwfl_errmsg (int error) 142b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 143b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (error == 0 || error == -1) 144b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 1457e678fa3f6051f7ef24b4610c9a66cab858b6b6eUlrich Drepper int last_error = global_error; 146b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 147b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (error == 0 && last_error == 0) 148b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return NULL; 149b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 150b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper error = last_error; 151b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper global_error = DWFL_E_NOERROR; 152b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 153b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 154b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper switch (error &~ 0xffff) 155b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 156b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case OTHER_ERROR (ERRNO): 157b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return strerror_r (error & 0xffff, "bad", 0); 158b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case OTHER_ERROR (LIBELF): 159b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return elf_errmsg (error & 0xffff); 160b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case OTHER_ERROR (LIBDW): 1614959bf89d92b59ba72bea5786d7b3f9b5564f750Roland McGrath return INTUSE(dwarf_errmsg) (error & 0xffff); 162b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#if 0 163b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper case OTHER_ERROR (LIBEBL): 164b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return ebl_errmsg (error & 0xffff); 165b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#endif 166b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 167b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 168b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return _(&msgstr[msgidx[(unsigned int) error < nmsgidx 169b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper ? error : DWFL_E_UNKNOWN_ERROR]]); 170b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 171b08d5a8fb42f4586d756068065186b5af7e48daUlrich DrepperINTDEF (dwfl_errmsg) 172