diff options
Diffstat (limited to 'src/pkg/sync/atomic/asm_linux_arm.s')
| -rw-r--r-- | src/pkg/sync/atomic/asm_linux_arm.s | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/pkg/sync/atomic/asm_linux_arm.s b/src/pkg/sync/atomic/asm_linux_arm.s index 098acf35b..5b16894b9 100644 --- a/src/pkg/sync/atomic/asm_linux_arm.s +++ b/src/pkg/sync/atomic/asm_linux_arm.s @@ -80,6 +80,10 @@ TEXT cas64<>(SB),7,$0 TEXT kernelCAS64<>(SB),7,$0 // int (*__kuser_cmpxchg64_t)(const int64_t *oldval, const int64_t *newval, volatile int64_t *ptr); MOVW addr+0(FP), R2 // ptr + // make unaligned atomic access panic + AND.S $7, R2, R1 + BEQ 2(PC) + MOVW R1, (R1) MOVW $4(FP), R0 // oldval MOVW $12(FP), R1 // newval BL cas64<>(SB) @@ -91,6 +95,10 @@ TEXT kernelCAS64<>(SB),7,$0 TEXT generalCAS64<>(SB),7,$20 // bool runtime·cas64(uint64 volatile *addr, uint64 *old, uint64 new) MOVW addr+0(FP), R0 + // make unaligned atomic access panic + AND.S $7, R0, R1 + BEQ 2(PC) + MOVW R1, (R1) MOVW R0, 4(R13) MOVW $4(FP), R1 // oldval MOVW R1, 8(R13) |