Orion

; This file contains a few assembly routines related to tasking.  These routines
; should be minimal, and get called from within various functions from the
; tasking system.  See the relevant C source for a better description of how the
; functions work.

; Get the return address
[global read_eip]
read_eip:
	mov eax, [esp]
	ret

; Switch to a task's context
[global context_switch]
context_switch:
	cli
	mov ecx, [esp + 4]
	mov eax, [esp + 8]
	mov ebp, [esp + 12]
	mov esp, [esp + 16]
	mov cr3, eax
	mov eax, 0x10032004 ; Magic number
	sti
	jmp ecx