| 1 | %define MULTIBOOT_HEADER_MAGIC 0x1badb002 |
| 2 | |
| 3 | ; Flags: |
| 4 | ; |
| 5 | ; bit 2: request framebuffer |
| 6 | %define MULTIBOOT_HEADER_FLAGS (1 << 2) |
| 7 | |
| 8 | extern multiboot_main |
| 9 | |
| 10 | global _start |
| 11 | |
| 12 | section .multiboot_header |
| 13 | |
| 14 | align 4 |
| 15 | header_start: |
| 16 | dd MULTIBOOT_HEADER_MAGIC ; Magic number (multiboot 1) |
| 17 | dd MULTIBOOT_HEADER_FLAGS ; Flags |
| 18 | dd -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) ; Checksum |
| 19 | header_end: |
| 20 | |
| 21 | section .text |
| 22 | bits 32 |
| 23 | |
| 24 | _start: |
| 25 | cli |
| 26 | |
| 27 | mov esp, stack_top |
| 28 | |
| 29 | push ebx |
| 30 | push eax |
| 31 | |
| 32 | call multiboot_main ; Jump to our multiboot test kernel |
| 33 | |
| 34 | section .bss |
| 35 | stack_bottom: |
| 36 | resb 4096 * 16 |
| 37 | stack_top: |
