alcedo/kernel/arch/i386/boot.s

29 lines
672 B
ArmAsm

# http://wiki.osdev.org/Bare_Bones_with_NASM
.set MBALIGN, 1<<0 # align loaded modules on page boundaries
.set MEMINFO, 1<<1 # provide memory map
.set FLAGS, MBALIGN | MEMINFO # this is the Multiboot 'flag' field
.set MAGIC, 0x1BADB002 # 'magic number' lets bootloader find the header
.set CHECKSUM,-(MAGIC + FLAGS) # checksum of above, to prove we are multiboot
.section .multiboot
.align 4
.long MAGIC
.long FLAGS
.long CHECKSUM
.section .bss
stack_bottom:
.skip 16384 # 16 KiB
stack_top:
.section .text
.global _start
.type _start, @function
_start:
mov $stack_top, %esp
call kernel_main
cli
.hang: hlt
jmp .hang
.end: