39 lines
532 B
ArmAsm
39 lines
532 B
ArmAsm
.define trp, fatal
|
|
|
|
fatal:
|
|
calr trp
|
|
sc $EXIT
|
|
|
|
trp:
|
|
push *RR14, R1
|
|
inc R15, $2
|
|
popl saveret, *RR14
|
|
pop R1, *RR14 !trap number in R1
|
|
pushl *RR14, saveret
|
|
push *RR14, R0
|
|
dec R15, $2
|
|
cp R1, $16
|
|
jr UGE, 1f
|
|
ld R0, trpim
|
|
bit R0, R1
|
|
jr NE, 2f !ignore
|
|
1: sub R15, $24
|
|
ldm *RR14, R2, $12
|
|
push *RR14, R1
|
|
ld R1, trppc
|
|
cp R1, $0
|
|
jr EQ, 3f
|
|
clr trppc
|
|
call 0(R1)
|
|
inc R15, $2
|
|
ldm R2, *RR14, $12
|
|
add R15, $24
|
|
2: pop R1, *RR14
|
|
pop R0, *RR14
|
|
ret
|
|
3: push *RR14, $err
|
|
calr printf
|
|
sc $EXIT
|
|
.data
|
|
err: .asciz "trap error %d\n"
|