nacl-mask.s
6.72 KB
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# RUN: llvm-mc -filetype=obj -triple=mipsel-unknown-nacl %s \
# RUN: | llvm-objdump -d -z --no-show-raw-insn - | FileCheck %s
# This test tests that address-masking sandboxing is added when given assembly
# input.
# Test that address-masking sandboxing is added before indirect branches and
# returns.
.align 4
test1:
.set noreorder
jr $a0
nop
jr $ra
nop
# CHECK-LABEL: <test1>:
# CHECK: and $4, $4, $14
# CHECK-NEXT: jr $4
# Check that additional nop is inserted, to align mask and jr to the next
# bundle.
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK: and $ra, $ra, $14
# CHECK-NEXT: jr $ra
# Test that address-masking sandboxing is added before load instructions.
.align 4
test2:
.set noreorder
lb $4, 0($1)
nop
lbu $4, 0($2)
lh $4, 0($3)
lhu $1, 0($4)
lw $4, 0($5)
lwc1 $f0, 0($6)
ldc1 $f2, 0($7)
ll $4, 0($8)
lwl $4, 0($9)
lwr $4, 0($10)
lw $4, 0($sp)
lw $4, 0($t8)
# CHECK-LABEL: <test2>:
# CHECK: and $1, $1, $15
# CHECK-NEXT: lb $4, 0($1)
# Check that additional nop is inserted, to align mask and load to the next
# bundle.
# CHECK: nop
# CHECK: nop
# CHECK: and $2, $2, $15
# CHECK-NEXT: lbu $4, 0($2)
# CHECK: and $3, $3, $15
# CHECK-NEXT: lh $4, 0($3)
# CHECK: and $4, $4, $15
# CHECK-NEXT: lhu $1, 0($4)
# CHECK: and $5, $5, $15
# CHECK-NEXT: lw $4, 0($5)
# CHECK: and $6, $6, $15
# CHECK-NEXT: lwc1 $f0, 0($6)
# CHECK: and $7, $7, $15
# CHECK-NEXT: ldc1 $f2, 0($7)
# CHECK: and $8, $8, $15
# CHECK-NEXT: ll $4, 0($8)
# CHECK: and $9, $9, $15
# CHECK-NEXT: lwl $4, 0($9)
# CHECK: and $10, $10, $15
# CHECK-NEXT: lwr $4, 0($10)
# Check that loads where base register is $sp or $t8 (thread pointer register)
# are not masked.
# CHECK-NOT: and
# CHECK: lw $4, 0($sp)
# CHECK-NOT: and
# CHECK: lw $4, 0($24)
# Test that address-masking sandboxing is added before store instructions.
.align 4
test3:
.set noreorder
sb $4, 0($1)
nop
sh $4, 0($2)
sw $4, 0($3)
swc1 $f0, 0($4)
sdc1 $f2, 0($5)
swl $4, 0($6)
swr $4, 0($7)
sc $4, 0($8)
sw $4, 0($sp)
sw $4, 0($t8)
# CHECK-LABEL: <test3>:
# CHECK: and $1, $1, $15
# CHECK-NEXT: sb $4, 0($1)
# Check that additional nop is inserted, to align mask and store to the next
# bundle.
# CHECK: nop
# CHECK: nop
# CHECK: and $2, $2, $15
# CHECK-NEXT: sh $4, 0($2)
# CHECK: and $3, $3, $15
# CHECK-NEXT: sw $4, 0($3)
# CHECK: and $4, $4, $15
# CHECK-NEXT: swc1 $f0, 0($4)
# CHECK: and $5, $5, $15
# CHECK-NEXT: sdc1 $f2, 0($5)
# CHECK: and $6, $6, $15
# CHECK-NEXT: swl $4, 0($6)
# CHECK: and $7, $7, $15
# CHECK-NEXT: swr $4, 0($7)
# CHECK: and $8, $8, $15
# CHECK-NEXT: sc $4, 0($8)
# Check that stores where base register is $sp or $t8 (thread pointer register)
# are not masked.
# CHECK-NOT: and
# CHECK: sw $4, 0($sp)
# CHECK-NOT: and
# CHECK: sw $4, 0($24)
# Test that address-masking sandboxing is added after instructions that change
# stack pointer.
.align 4
test4:
.set noreorder
addiu $sp, $sp, 24
nop
addu $sp, $sp, $1
lw $sp, 0($2)
lw $sp, 123($sp)
sw $sp, 123($sp)
# CHECK-LABEL: <test4>:
# CHECK: addiu $sp, $sp, 24
# CHECK-NEXT: and $sp, $sp, $15
# Check that additional nop is inserted, to align instruction and mask to the
# next bundle.
# CHECK: nop
# CHECK: nop
# CHECK: addu $sp, $sp, $1
# CHECK-NEXT: and $sp, $sp, $15
# Since we next check sandboxing sequence which consists of 3 instructions,
# check that 2 additional nops are inserted, to align it to the next bundle.
# CHECK: nop
# CHECK: nop
# Check that for instructions that change stack-pointer and load from memory
# masks are added before and after the instruction.
# CHECK: and $2, $2, $15
# CHECK-NEXT: lw $sp, 0($2)
# CHECK-NEXT: and $sp, $sp, $15
# For loads where $sp is destination and base, check that mask is added after
# but not before.
# CHECK-NOT: and
# CHECK: lw $sp, 123($sp)
# CHECK-NEXT: and $sp, $sp, $15
# For stores where $sp is destination and base, check that mask is added neither
# before nor after.
# CHECK-NOT: and
# CHECK: sw $sp, 123($sp)
# CHECK-NOT: and
# Test that call + branch delay is aligned at bundle end. Test that mask is
# added before indirect calls.
.align 4
test5:
.set noreorder
jal func1
addiu $4, $zero, 1
nop
bal func2
addiu $4, $zero, 2
nop
nop
bltzal $t1, func3
addiu $4, $zero, 3
nop
nop
nop
bgezal $t2, func4
addiu $4, $zero, 4
jalr $t9
addiu $4, $zero, 5
# CHECK: nop
# CHECK-NEXT: nop
# CHECK-LABEL: <test5>:
# CHECK-NEXT: jal
# CHECK-NEXT: addiu $4, $zero, 1
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: bal
# CHECK-NEXT: addiu $4, $zero, 2
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: bltzal
# CHECK-NEXT: addiu $4, $zero, 3
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: bgezal
# CHECK-NEXT: addiu $4, $zero, 4
# CHECK-NEXT: nop
# CHECK-NEXT: and $25, $25, $14
# CHECK-NEXT: jalr $25
# CHECK-NEXT: addiu $4, $zero, 5
# Test that we can put non-dangerous loads and stores in branch delay slot.
.align 4
test6:
.set noreorder
jal func1
sw $4, 0($sp)
bal func2
lw $5, 0($t8)
jalr $t9
sw $sp, 0($sp)
# CHECK: nop
# CHECK-NEXT: nop
# CHECK-LABEL: <test6>:
# CHECK-NEXT: jal
# CHECK-NEXT: sw $4, 0($sp)
# CHECK-NEXT: nop
# CHECK-NEXT: nop
# CHECK-NEXT: bal
# CHECK-NEXT: lw $5, 0($24)
# CHECK-NEXT: nop
# CHECK-NEXT: and $25, $25, $14
# CHECK-NEXT: jalr
# CHECK-NEXT: sw $sp, 0($sp)