freebsd-skq/lib/csu/i386-elf/crt1_s.S
kib 435503f326 The (%esp & 0xf) == 0 should be true before the call instruction is
executed, for the properly aligned stack.

Reported and tested by:	rstone
Pointy hat to:	kib
MFC after:	3 days
2011-01-13 23:00:22 +00:00

55 lines
1.8 KiB
ArmAsm

/*-
* Copyright 2009 Konstantin Belousov.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
.text
.align 4
.globl _start
.type _start, @function
_start:
.cfi_startproc
xorl %ebp,%ebp
pushl %ebp
.cfi_def_cfa_offset 4
movl %esp,%ebp
.cfi_offset %ebp,-8
.cfi_def_cfa_register %ebp
andl $0xfffffff0,%esp # align stack
leal 8(%ebp),%eax
subl $4,%esp
pushl %eax # argv
pushl 4(%ebp) # argc
pushl %edx # rtld cleanup
call _start1
int3
.cfi_endproc
.size _start, . - _start
.section .note.GNU-stack,"",%progbits