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; ###----------------------------------------------------------------###
; # file : exc010.u #
; # date : Mar 26 1996 #
; # descr. : functional test for mips #
; ###----------------------------------------------------------------###
; ###--------------------------------------------------------###
; # exceptions : #
; # - illegal instruction (when executing a mtc0) #
; ###--------------------------------------------------------###
new_sr .equ 0x00000000 ; try to set system mode
.org 0x00400000
.start init
init:
loadi r1 , new_sr ; init. r2 with the desired
;+value of sr
; ###--------------------------------------------------------###
; # move r1 into sr. This must generate an exception #
; # (privileged instruction) #
; ###--------------------------------------------------------###
loadi r31,back_from_exception
mtc0 r1, status ; EXCEPTION (privileged)
nop
j bad
nop
back_from_exception:
loadi r31,good
rfe ; EXCEPTION (privileged)
nop
j bad
nop
.org 0x004000d0
good: j good
nop
bad: j bad
nop
.end
|
