/*-
 * Copyright (c) 2008-2010 Rui Paulo <rpaulo@FreeBSD.org>
 * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
 *
 *	$BSDSUniX$
 */

	.text

#include <machine/asm.h>

#define EFI_SUCCESS		0

/*
 * EFI entry point. 
 * _start(EFI_IMAGE image_handle, EFI_SYSTEM_TABLE *system_table);
 *
 * We calculate the base address along with _DYNAMIC, relocate us and finally
 * pass control to efi_main.
 */

ENTRY(_start)
	pushl	%ebp
	movl	%esp, %ebp

	pushl	12(%ebp)	/* image_handle */
	pushl	8(%ebp)		/* system_table */
	call	0f
0:	popl	%eax
	movl	%eax, %ebx
	addl	$ImageBase-0b, %eax
	addl	$_DYNAMIC-0b, %ebx
	pushl	%ebx		/* dynamic */
	pushl	%eax		/* ImageBase */
	call	_reloc
	cmpl	$EFI_SUCCESS, %eax
	jne	1f
	popl	%ebx		/* remove ImageBase from the stack */
	popl	%ebx		/* remove dynamic from the stack */
	call	efi_main
1:	leave
	ret
END(_start)

	.data
	.section .reloc, "a"
	.long	0
	.long	10
	.word	0
