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/* mboot.S
* legacybios assembler bootstrap for multiboot
*
* Copyright (C) 2003 Stefan Reinauer
*
* See the file "COPYING" for further information about
* the copyright and warranty status of this work.
*/
#define ASM 1
#include <multiboot.h>
.text
.code32
.globl start, _start
/* unused */
start:
_start:
jmp multiboot_entry
/* Align 32 bits boundary. */
.align 4
/* Multiboot header. */
multiboot_header:
.long MULTIBOOT_HEADER_MAGIC /* magic */
.long MULTIBOOT_HEADER_FLAGS /* flags */
.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
/* checksum */
.long multiboot_header /* header_addr */
.long _start /* load_addr */
.long _edata /* load_end_addr */
.long _end /* bss_end_addr */
.long multiboot_entry /* entry_addr */
multiboot_entry:
/* Initialize stack pointer. */
movl $(stack + STACK_SIZE), %esp
/* Reset EFLAGS. */
pushl $0
popf
/* pointer to multiboot information structure. */
pushl %ebx
/* magic value. */
pushl %eax
/* jump to C main function... */
call EXT_C(cmain)
loop: hlt
jmp loop
.comm stack, STACK_SIZE /* stack area. */
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