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Diffstat (limited to 'pkg/sync/race_arm64.s')
| -rw-r--r-- | pkg/sync/race_arm64.s | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/pkg/sync/race_arm64.s b/pkg/sync/race_arm64.s new file mode 100644 index 000000000..88f091fda --- /dev/null +++ b/pkg/sync/race_arm64.s @@ -0,0 +1,35 @@ +// Copyright 2020 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build race +// +build arm64 + +#include "textflag.h" + +// func RaceUncheckedAtomicCompareAndSwapUintptr(ptr *uintptr, old, new uintptr) bool +TEXT ·RaceUncheckedAtomicCompareAndSwapUintptr(SB),NOSPLIT,$0-25 + MOVD ptr+0(FP), R0 + MOVD old+8(FP), R1 + MOVD new+16(FP), R1 +again: + LDAXR (R0), R3 + CMP R1, R3 + BNE ok + STLXR R2, (R0), R3 + CBNZ R3, again +ok: + CSET EQ, R0 + MOVB R0, ret+24(FP) + RET + |