41 lines
1.0 KiB
Go
41 lines
1.0 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package pgalloc
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import (
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"reflect"
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"syscall"
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"unsafe"
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)
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func unsafeSlice(addr uintptr, length int) (slice []byte) {
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sh := (*reflect.SliceHeader)(unsafe.Pointer(&slice))
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sh.Data = addr
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sh.Len = length
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sh.Cap = length
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return
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}
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func mincore(s []byte, buf []byte) error {
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if _, _, errno := syscall.RawSyscall(
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syscall.SYS_MINCORE,
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uintptr(unsafe.Pointer(&s[0])),
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uintptr(len(s)),
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uintptr(unsafe.Pointer(&buf[0]))); errno != 0 {
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return errno
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}
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return nil
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}
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