From 658f874b94ad83d9b4abed47d9aba856fe5f617c Mon Sep 17 00:00:00 2001 From: Andrei Vagin Date: Wed, 9 Dec 2020 00:42:53 -0800 Subject: Prepare for supporting cross compilation. PiperOrigin-RevId: 346496532 --- pkg/flipcall/packet_window_mmap_arm64.go | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 pkg/flipcall/packet_window_mmap_arm64.go (limited to 'pkg/flipcall/packet_window_mmap_arm64.go') diff --git a/pkg/flipcall/packet_window_mmap_arm64.go b/pkg/flipcall/packet_window_mmap_arm64.go new file mode 100644 index 000000000..b9c9c44f6 --- /dev/null +++ b/pkg/flipcall/packet_window_mmap_arm64.go @@ -0,0 +1,27 @@ +// 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 arm64 + +package flipcall + +import ( + "syscall" +) + +// Return a memory mapping of the pwd in memory that can be shared outside the sandbox. +func packetWindowMmap(pwd PacketWindowDescriptor) (uintptr, syscall.Errno) { + m, _, err := syscall.RawSyscall6(syscall.SYS_MMAP, 0, uintptr(pwd.Length), syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_SHARED, uintptr(pwd.FD), uintptr(pwd.Offset)) + return m, err +} -- cgit v1.2.3