diff options
| author | Dennis Kobert <dennis@kobert.dev> | 2019-10-24 19:12:49 +0200 |
|---|---|---|
| committer | natrixaeria <upezu@student.kit.edu> | 2019-10-24 20:08:58 +0200 |
| commit | 5b86e31087f6261dca28bb8c51a7a595998cc1d1 (patch) | |
| tree | 134bbe6ffa380f89b4d80e0bd1e3980a996b4b2b | |
| parent | 579d96f06f94a77363d467789ff95fcf5ed281b8 (diff) | |
Add error section and init stack
| -rw-r--r-- | kernel/src/boot.asm | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/src/boot.asm b/kernel/src/boot.asm index 839457e..a10b14c 100644 --- a/kernel/src/boot.asm +++ b/kernel/src/boot.asm @@ -3,6 +3,22 @@ global start section .text bits 32 start: + mov esp, stack_top + ; print 'OK' mov dword [0xb8000], 0x2f4b2f4f hlt + +; Prints 'ERR: ' and the given error code to the screen and halts +; parameter: error code letter (ascii) in al +error: + mov dword [0xb8000], 0x4f524f45 + mov dword [0xb8004], 0x4f3a4f52 + mov dword [0xb8008], 0x4f504f20 + mov byte [0xb800a], al + hlt + +section .bss +stack_bottom: + resb 64 +stack_top: |