Line data    Source code

       1             : /* Retrieve ELF descriptor used for DWARF access.
       2             :    Copyright (C) 2002, 2003, 2004, 2005, 2009, 2014, 2015 Red Hat, Inc.
       3             :    This file is part of elfutils.
       4             :    Written by Ulrich Drepper <drepper@redhat.com>, 2002.
       5             : 
       6             :    This file is free software; you can redistribute it and/or modify
       7             :    it under the terms of either
       8             : 
       9             :      * the GNU Lesser General Public License as published by the Free
      10             :        Software Foundation; either version 3 of the License, or (at
      11             :        your option) any later version
      12             : 
      13             :    or
      14             : 
      15             :      * the GNU General Public License as published by the Free
      16             :        Software Foundation; either version 2 of the License, or (at
      17             :        your option) any later version
      18             : 
      19             :    or both in parallel, as here.
      20             : 
      21             :    elfutils is distributed in the hope that it will be useful, but
      22             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      23             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      24             :    General Public License for more details.
      25             : 
      26             :    You should have received copies of the GNU General Public License and
      27             :    the GNU Lesser General Public License along with this program.  If
      28             :    not, see <http://www.gnu.org/licenses/>.  */
      29             : 
      30             : #ifdef HAVE_CONFIG_H
      31             : # include <config.h>
      32             : #endif
      33             : 
      34             : #include <assert.h>
      35             : #include <stddef.h>
      36             : 
      37             : #include "libdwP.h"
      38             : 
      39             : 
      40             : /* The error number.  */
      41             : static __thread int global_error;
      42             : 
      43             : 
      44             : int
      45         219 : dwarf_errno (void)
      46             : {
      47         219 :   int result = global_error;
      48         219 :   global_error = DWARF_E_NOERROR;
      49         219 :   return result;
      50             : }
      51             : INTDEF(dwarf_errno)
      52             : 
      53             : 
      54             : /* XXX For now we use string pointers.  Once the table stablelizes
      55             :    make it more DSO-friendly.  */
      56             : static const char *errmsgs[] =
      57             :   {
      58             :     [DWARF_E_NOERROR] = N_("no error"),
      59             :     [DWARF_E_UNKNOWN_ERROR] = N_("unknown error"),
      60             :     [DWARF_E_INVALID_ACCESS] = N_("invalid access"),
      61             :     [DWARF_E_NO_REGFILE] = N_("no regular file"),
      62             :     [DWARF_E_IO_ERROR] = N_("I/O error"),
      63             :     [DWARF_E_INVALID_ELF] = N_("invalid ELF file"),
      64             :     [DWARF_E_NO_DWARF] = N_("no DWARF information"),
      65             :     [DWARF_E_COMPRESSED_ERROR] = N_("cannot decompress DWARF"),
      66             :     [DWARF_E_NOELF] = N_("no ELF file"),
      67             :     [DWARF_E_GETEHDR_ERROR] = N_("cannot get ELF header"),
      68             :     [DWARF_E_NOMEM] = N_("out of memory"),
      69             :     [DWARF_E_UNIMPL] = N_("not implemented"),
      70             :     [DWARF_E_INVALID_CMD] = N_("invalid command"),
      71             :     [DWARF_E_INVALID_VERSION] = N_("invalid version"),
      72             :     [DWARF_E_INVALID_FILE] = N_("invalid file"),
      73             :     [DWARF_E_NO_ENTRY] = N_("no entries found"),
      74             :     [DWARF_E_INVALID_DWARF] = N_("invalid DWARF"),
      75             :     [DWARF_E_NO_STRING] = N_("no string data"),
      76             :     [DWARF_E_NO_ADDR] = N_("no address value"),
      77             :     [DWARF_E_NO_CONSTANT] = N_("no constant value"),
      78             :     [DWARF_E_NO_REFERENCE] = N_("no reference value"),
      79             :     [DWARF_E_INVALID_REFERENCE] = N_("invalid reference value"),
      80             :     [DWARF_E_NO_DEBUG_LINE] = N_(".debug_line section missing"),
      81             :     [DWARF_E_INVALID_DEBUG_LINE] = N_("invalid .debug_line section"),
      82             :     [DWARF_E_TOO_BIG] = N_("debug information too big"),
      83             :     [DWARF_E_VERSION] = N_("invalid DWARF version"),
      84             :     [DWARF_E_INVALID_DIR_IDX] = N_("invalid directory index"),
      85             :     [DWARF_E_ADDR_OUTOFRANGE] = N_("address out of range"),
      86             :     [DWARF_E_NO_LOCLIST] = N_("no location list value"),
      87             :     [DWARF_E_NO_BLOCK] = N_("no block data"),
      88             :     [DWARF_E_INVALID_LINE_IDX] = N_("invalid line index"),
      89             :     [DWARF_E_INVALID_ARANGE_IDX] = N_("invalid address range index"),
      90             :     [DWARF_E_NO_MATCH] = N_("no matching address range"),
      91             :     [DWARF_E_NO_FLAG] = N_("no flag value"),
      92             :     [DWARF_E_INVALID_OFFSET] = N_("invalid offset"),
      93             :     [DWARF_E_NO_DEBUG_RANGES] = N_(".debug_ranges section missing"),
      94             :     [DWARF_E_INVALID_CFI] = N_("invalid CFI section"),
      95             :     [DWARF_E_NO_ALT_DEBUGLINK] = N_("no alternative debug link found"),
      96             :     [DWARF_E_INVALID_OPCODE] = N_("invalid opcode"),
      97             :     [DWARF_E_NOT_CUDIE] = N_("not a CU (unit) DIE"),
      98             :   };
      99             : #define nerrmsgs (sizeof (errmsgs) / sizeof (errmsgs[0]))
     100             : 
     101             : 
     102             : void
     103             : internal_function
     104         218 : __libdw_seterrno (int value)
     105             : {
     106         436 :   global_error = (value >= 0 && value < (int) nerrmsgs
     107         218 :                   ? value : DWARF_E_UNKNOWN_ERROR);
     108         218 : }
     109             : 
     110             : 
     111             : const char *
     112          13 : dwarf_errmsg (int error)
     113             : {
     114          13 :   int last_error = global_error;
     115             : 
     116          13 :   if (error == 0)
     117           0 :     return last_error != 0 ? _(errmsgs[last_error]) : NULL;
     118          13 :   else if (error < -1 || error >= (int) nerrmsgs)
     119           0 :     return _(errmsgs[DWARF_E_UNKNOWN_ERROR]);
     120             : 
     121          13 :   return _(errmsgs[error == -1 ? last_error : error]);
     122             : }
     123             : INTDEF(dwarf_errmsg)