| ;;; GRUB Multiboot header, calls main() in main.c |
| |
| MBOOT_PAGE_ALIGN equ 1<<0 |
| MBOOT_MEM_INFO equ 1<<1 |
| MBOOT_HEADER_MAGIC equ 0x1BADB002 |
| |
| MBOOT_HEADER_FLAGS equ MBOOT_PAGE_ALIGN | MBOOT_MEM_INFO |
| MBOOT_CHECKSUM equ -(MBOOT_HEADER_MAGIC + MBOOT_HEADER_FLAGS) |
| |
| |
| [bits 32] |
| |
| [global mboot] |
| [extern code] |
| [extern bss] |
| [extern end] |
| |
| mboot: |
| dd MBOOT_HEADER_MAGIC ; This tells GRUB to start executing here: |
| dd MBOOT_HEADER_FLAGS |
| dd MBOOT_CHECKSUM |
| |
| dd mboot ; Current location |
| dd code ; .text section |
| dd bss ; End of .data |
| dd end ; End of kernel |
| dd start |
| |
| [global start] |
| [extern kmain] ; C code |
| |
| start: |
| push ebx ; Holds multiboot header location |
| |
| cli |
| call kmain |
| jmp $ |