elfutils/libdw/dwarf_error.c

/* Retrieve ELF descriptor used for DWARF access.
   Copyright (C) 2002, 2003, 2004, 2005, 2009 Red Hat, Inc.
   This file is part of Red Hat elfutils.
   Written by Ulrich Drepper <drepper@redhat.com>, 2002.

   Red Hat elfutils is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by the
   Free Software Foundation; version 2 of the License.

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   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with Red Hat elfutils; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.

   In addition, as a special exception, Red Hat, Inc. gives You the
   additional right to link the code of Red Hat elfutils with code licensed
   under any Open Source Initiative certified open source license
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   this file solely under the GPL without exception.

   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <assert.h>
#include <stddef.h>

#include "libdwP.h"


/* The error number.  */
static __thread int global_error;


int
dwarf_errno (void)
{
  int result = global_error;
  global_error = DWARF_E_NOERROR;
  return result;
}
INTDEF(dwarf_errno)


/* XXX For now we use string pointers.  Once the table stablelizes
   make it more DSO-friendly.  */
static const char *errmsgs[] =
  {
    [DWARF_E_NOERROR] = N_("no error"),
    [DWARF_E_UNKNOWN_ERROR] = N_("unknown error"),
    [DWARF_E_INVALID_ACCESS] = N_("invalid access"),
    [DWARF_E_NO_REGFILE] = N_("no regular file"),
    [DWARF_E_IO_ERROR] = N_("I/O error"),
    [DWARF_E_INVALID_ELF] = N_("invalid ELF file"),
    [DWARF_E_NO_DWARF] = N_("no DWARF information"),
    [DWARF_E_NOELF] = N_("no ELF file"),
    [DWARF_E_GETEHDR_ERROR] = N_("cannot get ELF header"),
    [DWARF_E_NOMEM] = N_("out of memory"),
    [DWARF_E_UNIMPL] = N_("not implemented"),
    [DWARF_E_INVALID_CMD] = N_("invalid command"),
    [DWARF_E_INVALID_VERSION] = N_("invalid version"),
    [DWARF_E_INVALID_FILE] = N_("invalid file"),
    [DWARF_E_NO_ENTRY] = N_("no entries found"),
    [DWARF_E_INVALID_DWARF] = N_("invalid DWARF"),
    [DWARF_E_NO_STRING] = N_("no string data"),
    [DWARF_E_NO_ADDR] = N_("no address value"),
    [DWARF_E_NO_CONSTANT] = N_("no constant value"),
    [DWARF_E_NO_REFERENCE] = N_("no reference value"),
    [DWARF_E_INVALID_REFERENCE] = N_("invalid reference value"),
    [DWARF_E_NO_DEBUG_LINE] = N_(".debug_line section missing"),
    [DWARF_E_INVALID_DEBUG_LINE] = N_("invalid .debug_line section"),
    [DWARF_E_TOO_BIG] = N_("debug information too big"),
    [DWARF_E_VERSION] = N_("invalid DWARF version"),
    [DWARF_E_INVALID_DIR_IDX] = N_("invalid directory index"),
    [DWARF_E_ADDR_OUTOFRANGE] = N_("address out of range"),
    [DWARF_E_NO_LOCLIST] = N_("no location list value"),
    [DWARF_E_NO_BLOCK] = N_("no block data"),
    [DWARF_E_INVALID_LINE_IDX] = N_("invalid line index"),
    [DWARF_E_INVALID_ARANGE_IDX] = N_("invalid address range index"),
    [DWARF_E_NO_MATCH] = N_("no matching address range"),
    [DWARF_E_NO_FLAG] = N_("no flag value"),
    [DWARF_E_INVALID_OFFSET] = N_("invalid offset"),
    [DWARF_E_NO_DEBUG_RANGES] = N_(".debug_ranges section missing"),
    [DWARF_E_INVALID_CFI] = N_("invalid CFI section"),
  };
#define nerrmsgs (sizeof (errmsgs) / sizeof (errmsgs[0]))


void
__libdw_seterrno (value)
     int value;
{
  global_error = (value >= 0 && value < (int) nerrmsgs
		  ? value : DWARF_E_UNKNOWN_ERROR);
}


const char *
dwarf_errmsg (error)
     int error;
{
  int last_error = global_error;

  if (error == 0)
    return last_error != 0 ? _(errmsgs[last_error]) : NULL;
  else if (error < -1 || error >= (int) nerrmsgs)
    return _(errmsgs[DWARF_E_UNKNOWN_ERROR]);

  return _(errmsgs[error == -1 ? last_error : error]);
}
INTDEF(dwarf_errmsg)