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/* Error handling in libasm.
Copyright (C) 2002, 2004, 2005 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <libintl.h>
#include <stdbool.h>
#include <stdlib.h>
#include "libasmP.h"
/* This is the key for the thread specific memory. */
static tls_key_t key;
/* The error number. Used in non-threaded programs. */
static int global_error;
static bool threaded;
/* We need to initialize the thread-specific data. */
once_define (static, once);
/* The initialization and destruction functions. */
static void init (void);
static void free_key_mem (void *mem);
int
asm_errno (void)
{
int result;
/* If we have not yet initialized the buffer do it now. */
once_execute (once, init);
if (threaded)
{
/* We have a key. Use it to get the thread-specific buffer. */
int *buffer = getspecific (key);
if (buffer == NULL)
{
/* No buffer allocated so far. */
buffer = (int *) malloc (sizeof (int));
if (buffer == NULL)
/* No more memory available. We use the static buffer. */
buffer = &global_error;
setspecific (key, buffer);
*buffer = 0;
}
result = *buffer;
*buffer = ASM_E_NOERROR;
return result;
}
result = global_error;
global_error = ASM_E_NOERROR;
return result;
}
void
__libasm_seterrno (value)
int value;
{
/* If we have not yet initialized the buffer do it now. */
once_execute (once, init);
if (threaded)
{
/* We have a key. Use it to get the thread-specific buffer. */
int *buffer = getspecific (key);
if (buffer == NULL)
{
/* No buffer allocated so far. */
buffer = malloc (sizeof (int));
if (buffer == NULL)
/* No more memory available. We use the static buffer. */
buffer = &global_error;
setspecific (key, buffer);
}
*buffer = value;
}
global_error = value;
}
/* Return the appropriate message for the error. */
static const char *msgs[ASM_E_NUM] =
{
[ASM_E_NOERROR] = N_("no error"),
[ASM_E_NOMEM] = N_("out of memory"),
[ASM_E_CANNOT_CREATE] = N_("cannot create output file"),
[ASM_E_INVALID] = N_("invalid parameter"),
[ASM_E_CANNOT_CHMOD] = N_("cannot change mode of output file"),
[ASM_E_CANNOT_RENAME] = N_("cannot rename output file"),
[ASM_E_DUPLSYM] = N_("duplicate symbol"),
[ASM_E_TYPE] = N_("invalid section type for operation"),
[ASM_E_IOERROR] = N_("error during output of data"),
};
const char *
asm_errmsg (error)
int error;
{
int last_error;
/* If we have not yet initialized the buffer do it now. */
once_execute (once, init);
if ((error == 0 || error == -1) && threaded)
{
/* We have a key. Use it to get the thread-specific buffer. */
int *buffer = (int *) getspecific (key);
if (buffer == NULL)
{
/* No buffer allocated so far. */
buffer = (int *) malloc (sizeof (int));
if (buffer == NULL)
/* No more memory available. We use the static buffer. */
buffer = &global_error;
setspecific (key, buffer);
*buffer = 0;
}
last_error = *buffer;
}
else
last_error = global_error;
if (error < -1)
return _("unknown error");
if (error == 0 && last_error == 0)
/* No error. */
return NULL;
if (error != -1)
last_error = error;
if (last_error == ASM_E_LIBELF)
return elf_errmsg (-1);
return _(msgs[last_error]);
}
/* Free the thread specific data, this is done if a thread terminates. */
static void
free_key_mem (void *mem)
{
free (mem);
setspecific (key, NULL);
}
/* Initialize the key for the global variable. */
static void
init (void)
{
// XXX Screw you, gcc4, the unused function attribute does not work.
__asm ("" :: "r" (free_key_mem));
if (key_create (&key, free_key_mem) == 0)
/* Creating the key succeeded. */
threaded = true;
}
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