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arch: fix SVC interrupt handler
author Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date Wed, 27 Apr 2011 13:00:16 -0400
parents ca308c8ca41e
children cabcdc3727e3
line wrap: on
line source

#include "svcint.h"

.text
	.align	4
.globl SVCINT
	.type	SVCINT, @function
SVCINT:
	stmg	%r0,%r15,_PSA_GPRS

	xgr	%r2,%r2
	ic	%r2,_PSA_SVC_ID+3	# r2 = SVC
	lmg	%r3,%r6,_PSA_GPRS+16	# shift all the args
	xgr	%r7,%r7			# just to make sure accesses to more
					# than 4 args fail
	larl	%r15,_SVC_STACK
	lg	%r15,0(%r15)

	# call into C... f(svc, arg0, arg1, arg2, arg3)
	larl	%r14,_SVC_HANDLER
	lg	%r14,0(%r14)
	basr	%r14,%r14

	stmg	%r2,%r3,_PSA_GPRS+16	# store the return value

	lmg	%r0,%r15,_PSA_GPRS
	lpswe	_PSA_OLD_SVC_PSW