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

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/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but 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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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <sysdep.h>
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	.text
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	.type	_exit,@function
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	.global	_exit
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_exit:
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	movl	4(%esp), %ebx
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	/* Try the new syscall first.  */
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#ifdef __NR_exit_group
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	movl	$__NR_exit_group, %eax
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	ENTER_KERNEL
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#endif
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	/* Not available.  Now the old one.  */
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	movl	$__NR_exit, %eax
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	/* Don't bother using ENTER_KERNEL here.  If the exit_group
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	   syscall is not available AT_SYSINFO isn't either.  */
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	int	$0x80
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	/* This must not fail.  Be sure we don't return.  */
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	hlt
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	.size	_exit,.-_exit
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libc_hidden_def (_exit)
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rtld_hidden_def (_exit)
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weak_alias (_exit, _Exit)