xref: /freebsd-13-stable/lib/csu/i386/crt1_s.S (revision 3d497e17ebd33fe0f58d773e35ab994d750258d6)
1/*-
2 * Copyright 2009 Konstantin Belousov.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *
11 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
12 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
13 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
14 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
17 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
18 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 */
22
23#include <machine/asm.h>
24	.text
25	.align	4
26	.globl	_start
27	.type	_start, @function
28_start:
29	.cfi_startproc
30	xorl	%ebp,%ebp
31	pushl	%ebp
32	.cfi_def_cfa_offset 4
33	movl	%esp,%ebp
34	.cfi_offset %ebp,-8
35	.cfi_def_cfa_register %ebp
36	andl	$0xfffffff0,%esp # align stack
37	leal	8(%ebp),%eax
38	subl	$4,%esp
39	pushl	%eax		# argv
40	pushl	4(%ebp)		# argc
41	pushl	%edx		# rtld cleanup
42	call	_start1
43	int3
44	.cfi_endproc
45	.size	_start, . - _start
46
47	.section .note.GNU-stack,"",%progbits
48