// CC BY
// code by SASANO Takayoshi

#define	MULTIBOOT_HEADER_MAGIC	0x1badb002
#define	MULTIBOOT_PAGE_ALIGN	0x00000001
#define	MULTIBOOT_MEMORY_INFO	0x00000002

#define	MULTIBOOT_FLAGS		(MULTIBOOT_PAGE_ALIGN | MULTIBOOT_MEMORY_INFO)
#define	MULTIBOOT_CHECKSUM	-(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_FLAGS)

	.section	.multiboot_header, "a"
	.align	4
	.long	MULTIBOOT_HEADER_MAGIC
	.long	MULTIBOOT_FLAGS
	.long	MULTIBOOT_CHECKSUM


	.text
	.code32
	.global	_start
	.type	_start, @function
_start:
	movl	$stack_top, %esp
	pushl	$0
	popf
	movl	%eax, multiboot_magic
	movl	%ebx, multiboot_information

	call	main

die:	
	hlt
	jmp	die


	.bss
	.comm	multiboot_magic, 4
	.comm	multiboot_information, 4


	.section	.bootstrap_stack, "aw", @nobits
stack_bottom:
	.skip	4096
stack_top: