tk_wri_dev.s

tkernel操作系统的源代码,是一位日本教授领导开发的,占有很大市场

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.01.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2004/6/28.
 *
 *----------------------------------------------------------------------
 */

/*
 *	T-Kernel extended SVC interface library (m32104)
 *
 *	   created from /usr/local/te/include/tk/devmgr.h
 */

#include <machine.h>
#include <tk/sysdef.h>
#include <sys/svc/fndevmgr.h>

	.text
	.balign	4
	.globl	Csym(tk_wri_dev)
	.type	Csym(tk_wri_dev), @function
Csym(tk_wri_dev):
	st	r3, @-sp
	st	r2, @-sp
	st	r1, @-sp
	st	r0, @-sp
	seth	r4, #high(DEVICE_TK_WRI_DEV_FN)
	or3	r4, r4, #low(DEVICE_TK_WRI_DEV_FN)
	mv	r0, sp
	trap	#TRAP_SVC
	addi	sp, #4*4
	jmp	r14