// Copyright 2023 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. //go:build amd64 // +build amd64 #include "textflag.h" // func MemoryFenceReads() TEXT ·MemoryFenceReads(SB),NOSPLIT|NOFRAME,$0-0 // No memory fence is required on x86. However, a compiler fence is // required to prevent the compiler from reordering memory accesses. The Go // compiler will not reorder memory accesses around a call to an assembly // function; compare runtime.publicationBarrier. RET