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https://github.com/autc04/Retro68.git
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172 lines
3.5 KiB
C
172 lines
3.5 KiB
C
/* Error handling in libdwfl.
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Copyright (C) 2005-2015 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <assert.h>
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#include <libintl.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "libdwflP.h"
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/* The error number. */
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static __thread int global_error;
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int
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dwfl_errno (void)
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{
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int result = global_error;
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global_error = DWFL_E_NOERROR;
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return result;
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}
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INTDEF (dwfl_errno)
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struct msgtable
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{
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#define DWFL_ERROR(name, text) char msg_##name[sizeof text];
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DWFL_ERRORS
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#undef DWFL_ERROR
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};
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static const union
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{
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struct msgtable table;
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char strings[
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#define DWFL_ERROR(name, text) + sizeof text
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DWFL_ERRORS
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#undef DWFL_ERROR
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];
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} msgtable =
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{
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.table =
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{
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#define DWFL_ERROR(name, text) text,
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DWFL_ERRORS
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#undef DWFL_ERROR
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}
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};
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#define msgstr (msgtable.strings)
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static const uint_fast16_t msgidx[] =
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{
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#define DWFL_ERROR(name, text) \
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[DWFL_E_##name] = offsetof (struct msgtable, msg_##name),
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DWFL_ERRORS
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#undef DWFL_ERROR
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};
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#define nmsgidx (sizeof msgidx / sizeof msgidx[0])
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static inline int
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canonicalize (Dwfl_Error error)
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{
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unsigned int value;
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switch (error)
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{
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default:
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value = error;
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if ((value &~ 0xffff) != 0)
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break;
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assert (value < nmsgidx);
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break;
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case DWFL_E_ERRNO:
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value = DWFL_E (ERRNO, errno);
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break;
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case DWFL_E_LIBELF:
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value = DWFL_E (LIBELF, elf_errno ());
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break;
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case DWFL_E_LIBDW:
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value = DWFL_E (LIBDW, INTUSE(dwarf_errno) ());
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break;
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#if 0
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DWFL_E_LIBEBL:
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value = DWFL_E (LIBEBL, ebl_errno ());
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break;
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#endif
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}
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return value;
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}
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int
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internal_function
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__libdwfl_canon_error (Dwfl_Error error)
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{
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return canonicalize (error);
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}
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void
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internal_function
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__libdwfl_seterrno (Dwfl_Error error)
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{
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global_error = canonicalize (error);
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}
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const char *
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dwfl_errmsg (int error)
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{
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if (error == 0 || error == -1)
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{
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int last_error = global_error;
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if (error == 0 && last_error == 0)
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return NULL;
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error = last_error;
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global_error = DWFL_E_NOERROR;
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}
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switch (error &~ 0xffff)
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{
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case OTHER_ERROR (ERRNO):
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return strerror_r (error & 0xffff, "bad", 0);
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case OTHER_ERROR (LIBELF):
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return elf_errmsg (error & 0xffff);
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case OTHER_ERROR (LIBDW):
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return INTUSE(dwarf_errmsg) (error & 0xffff);
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#if 0
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case OTHER_ERROR (LIBEBL):
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return ebl_errmsg (error & 0xffff);
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#endif
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}
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return _(&msgstr[msgidx[(unsigned int) error < nmsgidx
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? error : DWFL_E_UNKNOWN_ERROR]]);
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}
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INTDEF (dwfl_errmsg)
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