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glibc  2.9
_exit.c
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00001 /* Copyright (C) 1994, 1997, 1999 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
00004      On-Line Applications Research Corporation.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <unistd.h>
00022 #include <stdlib.h>
00023 #include "m68020.h"
00024 
00025 /* Return control to 135Bug */
00026 
00027 void
00028 __exit_trap ()
00029 {
00030   set_vbr( 0 );                     /* restore 135Bug vectors */
00031   asm volatile( "trap   #15"  );    /* trap to 135Bug */
00032   asm volatile( ".short 0x63" );    /* return to 135Bug (.RETURN) */
00033   asm volatile( "jmp    main" );    /* restart program */
00034 }
00035 
00036 /* The function `_exit' should take a status argument and simply
00037    terminate program execution, using the low-order 8 bits of the
00038    given integer as status.  */
00039 
00040 void
00041 __attribute__ ((noreturn))
00042 _exit (status)
00043      int status;
00044 {
00045   /* status is ignored */
00046 
00047   M68Kvec[ 45 ] = __exit_trap;   /* install exit_trap handler */
00048   asm volatile( "trap #13" );  /* insures SUPV mode */
00049 }
00050 weak_alias (_exit, _Exit)