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| author | nybidari <59618317+nybidari@users.noreply.github.com> | 2020-02-25 15:33:59 -0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-02-25 15:33:59 -0800 |
| commit | 818abc2bd5096bf7dc6f621cfd2923bee4e0fc7b (patch) | |
| tree | 0f7f90cecb6afc332a3229651eba4da391a46b41 /pkg/syncevent/waiter_arm64.s | |
| parent | acc405ba60834f5dce9ce04cd762d5cda02224cb (diff) | |
| parent | 72e3f3a3eef3a1dc02db0ff71f98a5d7fe89a6e3 (diff) | |
Merge branch 'master' into iptables
Diffstat (limited to 'pkg/syncevent/waiter_arm64.s')
| -rw-r--r-- | pkg/syncevent/waiter_arm64.s | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/pkg/syncevent/waiter_arm64.s b/pkg/syncevent/waiter_arm64.s new file mode 100644 index 000000000..20d7ac23b --- /dev/null +++ b/pkg/syncevent/waiter_arm64.s @@ -0,0 +1,34 @@ +// 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. + +#include "textflag.h" + +// See waiter_noasm_unsafe.go for a description of waiterUnlock. +// +// func waiterUnlock(g unsafe.Pointer, wg *unsafe.Pointer) bool +TEXT ·waiterUnlock(SB),NOSPLIT,$0-24 + MOVD wg+8(FP), R0 + MOVD $·preparingG(SB), R1 + MOVD g+0(FP), R2 +again: + LDAXR (R0), R3 + CMP R1, R3 + BNE ok + STLXR R2, (R0), R3 + CBNZ R3, again +ok: + CSET EQ, R0 + MOVB R0, ret+16(FP) + RET + |