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li t0,0x400
csrw mseccfg,t0 # Turn on MLPE (enable Zicfilp)
li t0,1
csrw 0x800,t0 # Enable lightweight mode (will make each pause 1s long)
li a7,4
la a0,test1msg
ecall # Display test 1 explanation
pause
pause
la s0,test1jump
jalr zero,s0,0 # This jump lands on a landing pad
.word 0 # Invalid instruction just to make sure the jump really happened
test1jump:
lpad 0
li a7,4
la a0,test1done
ecall # Tell user we got here
pause
pause
li a7,4
la a0,test2msg
ecall # Display test 2 explanation
pause
pause
la s0,test2jump
jalr zero,s0,0 # This jump doesn't land on a landing pad
.word 0 # Another invalid instruction to jump over
test2jump:
# No landing pad! This should crash
li a7,4
la a0,test2done
ecall # Tell user we got here (we shouldn't have!)
li a7,10
ecall
test1msg: .asciz "Testing OK jump\nThis should work\n\n\n\n"
test1done: .asciz "OK jump jumped\nThis is expected\n\n\n\n"
test2msg: .asciz "Testing bad jump\nThis should crash\n\n\n\n"
test2done: .asciz "Bad jump jumped!\nThis shouldn't\nhappen\n\n\n"
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