forked from Imagelibrary/rtems
161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
/*
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* Implementation of hooks for the CYGNUS newlib libc
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* These hooks set things up so that:
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* + '_REENT' is switched at task switch time.
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*
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* COPYRIGHT (c) 1994 by Division Incorporated
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.com/license/LICENSE.
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*
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* $Id$
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*
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
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#include <rtems.h>
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#if defined(RTEMS_NEWLIB)
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#include <rtems/libcsupport.h>
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/* Since we compile with strict ANSI we need to undef it to get
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* prototypes for extensions
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*/
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#undef __STRICT_ANSI__
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#include <stdlib.h> /* for free() */
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#include <string.h> /* for memset() */
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#include <sys/reent.h> /* for extern of _REENT (aka _impure_ptr) */
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#include <errno.h>
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#include <stdio.h>
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int _fwalk(struct _reent *ptr, int (*function) (FILE *) );
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/* do we think we are reentrant? */
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extern int libc_reentrant;
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extern struct _reent * const _global_impure_ptr __ATTRIBUTE_IMPURE_PTR__;
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/*
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* CYGNUS newlib routine that does atexit() processing and flushes
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* stdio streams
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* undocumented
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*/
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extern void _wrapup_reent(struct _reent *);
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extern void _reclaim_reent(struct _reent *);
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void libc_wrapup(void)
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{
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/*
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* In case RTEMS is already down, don't do this. It could be
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* dangerous.
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*/
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if (!_System_state_Is_up(_System_state_Get()))
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return;
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/*
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* This was already done if the user called exit() directly .
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_wrapup_reent(0);
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*/
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if (_REENT != _global_impure_ptr) {
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_wrapup_reent(_global_impure_ptr);
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#if 0
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/* Don't reclaim this one, just in case we do printfs
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* on the way out to ROM.
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*/
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_reclaim_reent(&libc_global_reent);
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#endif
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_REENT = _global_impure_ptr;
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}
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/*
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* Try to drain output buffers.
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*
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* Should this be changed to do *all* file streams?
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* _fwalk (_REENT, fclose);
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*/
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fclose (stdin);
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fclose (stdout);
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fclose (stderr);
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}
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/*
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* Function: _exit
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* Created: 94/12/10
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*
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* Description:
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* Called from exit() after it does atexit() processing and stdio fflush's
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*
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* called from bottom of exit() to really delete the task.
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* If we are using reentrant libc, then let the delete extension
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* do all the work, otherwise if a shutdown is in progress,
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* then just do it.
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*
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* Parameters:
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* exit status
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*
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* Returns:
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* does not return
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*
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* Side Effects:
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*
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* Notes:
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*
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*
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* Deficiencies/ToDo:
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*
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*
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*/
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#include <unistd.h>
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/* FIXME: These defines are a blatant hack */
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#define EXIT_SYMBOL _exit
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#if defined(__AVR__)
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#undef __USE_INIT_FINI__
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#endif
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#if defined(__USE_INIT_FINI__)
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#if defined(__m32r__)
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#define FINI_SYMBOL __fini
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#else
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#define FINI_SYMBOL _fini
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#endif
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extern void FINI_SYMBOL( void );
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#endif
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void EXIT_SYMBOL(int status)
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{
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/*
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* If the toolset uses init/fini sections, then we need to
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* run the global destructors now.
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*/
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#if defined(__USE_INIT_FINI__)
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FINI_SYMBOL();
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#endif
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/*
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* We need to do the exit processing on the global reentrancy structure.
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* This has already been done on the per task reentrancy structure
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* associated with this task.
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*/
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libc_wrapup();
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rtems_shutdown_executive(status);
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for (;;) ; /* to avoid warnings */
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}
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#endif
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