Line data    Source code

       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.  */
      40             : static __thread int global_error;
      41             : 
      42             : 
      43             : int
      44      423335 : dwarf_errno (void)
      45             : {
      46      423335 :   int result = global_error;
      47      423335 :   global_error = DWARF_E_NOERROR;
      48      423335 :   return result;
      49             : }
      50             : INTDEF(dwarf_errno)
      51             : 
      52             : 
      53             : /* XXX For now we use string pointers.  Once the table stablelizes
      54             :    make it more DSO-friendly.  */
      55             : static 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             : 
     109             : void
     110             : internal_function
     111     5992839 : __libdw_seterrno (int value)
     112             : {
     113    11985678 :   global_error = (value >= 0 && value < (int) nerrmsgs
     114     5992839 :                   ? value : DWARF_E_UNKNOWN_ERROR);
     115     5992839 : }
     116             : 
     117             : 
     118             : const char *
     119          14 : dwarf_errmsg (int error)
     120             : {
     121          14 :   int last_error = global_error;
     122             : 
     123          14 :   if (error == 0)
     124           0 :     return last_error != 0 ? _(errmsgs[last_error]) : NULL;
     125          14 :   else if (error < -1 || error >= (int) nerrmsgs)
     126           0 :     return _(errmsgs[DWARF_E_UNKNOWN_ERROR]);
     127             : 
     128          19 :   return _(errmsgs[error == -1 ? last_error : error]);
     129             : }
     130             : INTDEF(dwarf_errmsg)