sysdeps/unix/sysv/linux/i386/_exit.S

   1 /* Copyright (C) 2002-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sysdep.h>
  19
  20         .text
  21         .type   _exit,@function
  22         .global _exit
  23 _exit:
  24         movl    4(%esp), %ebx
  25
  26         /* Try the new syscall first.  */
  27 #ifdef __NR_exit_group
  28         movl    $__NR_exit_group, %eax
  29         ENTER_KERNEL
  30 #endif
  31
  32         /* Not available.  Now the old one.  */
  33         movl    $__NR_exit, %eax
  34         /* Don't bother using ENTER_KERNEL here.  If the exit_group
  35            syscall is not available AT_SYSINFO isn't either.  */
  36         int     $0x80
  37
  38         /* This must not fail.  Be sure we don't return.  */
  39         hlt
  40         .size   _exit,.-_exit
  41
  42 libc_hidden_def (_exit)
  43 weak_alias (_exit, _Exit)