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/* ia32-crt0.S - Startup code for ia32.
Copyright (C) 2003 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#define ASM 1
#include "multiboot.h"
/* The size of our stack (64*4KB). */
#define STACK_SIZE 64*0x1000
.text
.globl start, _start
start:
_start:
/* Initialize the stack pointer. */
movl $(stack + STACK_SIZE), %esp
/* Reset EFLAGS. */
pushl $0
popf
/* Now enter the cmain function. Instead of using call, we
jump and put a return address of 0 on the stack. We also zeor
the frame pointer. In this way, __builtin_return_address
works more reliably. */
pushl $0
xor %ebp, %ebp
jmp cmain
/* Not reached. */
loop: hlt
jmp loop
/* Our stack area. */
.comm stack, STACK_SIZE
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