;;
;;  test/demos/asm/get_sp.asm
;;	Copyright (C) 2008 Markus Broeker
;;

%include "asm/tools.inc"

segment .data
label1  	db  			"NASM Powered...", 10, 0
reg_format	db			"EAX=%08x EBX=%08x ECX=%08x EDX=%08x", 10, 0
st_format	db			"EBP=%08x ESP=%08x ESI=%08x EDI=%08x", 10, 10, 0
trace_fmt	db			"[EBP-20] = %08x", 10, \
					"[EBP-16] = %08x", 10, "[EBP-12] = %08x", 10, \
					"[EBP- 8] = %08x", 10, "[EBP- 4] = %08x", 10, \
					"[EBP+ 0] = %08x", 10, "[EBP+ 4] = %08x", 10, \
					"[EBP+ 8] = %08x", 10, "[EBP+12] = %08x", 10, \
					"[EBP+16] = %08x", 10, "[EBP+20] = %08x", 10, 10, 0

segment .bss
	savexp resd 1			;; uninitialized dword value
					;; currently not used

segment .text
	global get_sp

get_sp:
	enter 4,0			;; push ebp		;; Save Base-Pointer
					;; mov ebp, esp ;; Copy Stackpointer for !!local usage!!
					;; sub esp, 4   ;; Make room for 1 DWORD

	mov [ebp-4], esp		;; Store result in !! local variable !!

	push DWORD label1
	call printf
	add esp, byte 4			;; remove label1 from stack

	call stack_trace

	call reg_info
	call stack_info

	call reg_info
	call stack_info

	call stack_trace

	;; clean up
	mov eax, [ebp-4]		;; return local var
	leave 				;; mov esp, ebp pop ebp
	ret				;; return eax