shreg.asm

一个小型的操作系统,采用gcc进行开发,几千行的代码,方便初学者学习

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; Snixos Project version 1.0, 2003.6
; (C) Copyright 2003,2004,2005 Jockeyson,KeqiangGao <[e-mail]>
; All Rights Reserved.
; Distributed under the terms of the GNU General Public License.
;
; This program is a free and open source software and you can redistribute 
; it and/or modify it under the terms of the GNU General Public License as
; published by the Free Software Foundation. As no any liability is assumed 
; for any incidental or consequential damages in connection with the 
; information or program fragments contained herein,so any exception arised
; is at your own risk. It is ABSOLUTELY WITHOUT ANY WARRANTY.
; Bug report please send to [e-mail] .
;
;  shreg.asm:  	show cpu registers in Snixos Project
;  		protype inc C: void showreg()
;  Author : [e-mail]
;  Time   : 2003.6
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

bits 32	
global shreg
extern printf
shreg:
        push ebp
        mov ebp,esp
	push gs
	push fs
	push ss
	push es
	push ds
	push cs
	pushf
	push ebp
        push eax
        mov eax,esp
        add eax,9*4
        xchg eax,[esp] ; value of esp send to stack when shreg is called 
	push edi
	push esi
	push edx
	push ecx
	push ebx
	push eax
        push dword .str
        call printf
	add esp,68

	leave
        ret
.str db 10,"EAX=%0X EBX=%0X ECX=%0X EDX=%0X ESI=%0X EDI=%0X",10, "ESP=%0X EBP=%0X Eflg=%0X ",10,"cs=%0X ds=%0X es=%0X ss=%0X fs=%0X gs=%0X",10,0