42 lines
1.1 KiB
Go
42 lines
1.1 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 ring0
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import (
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"unsafe"
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)
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// eface mirrors runtime.eface.
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type eface struct {
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typ uintptr
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data unsafe.Pointer
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}
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// kernelAddr returns the kernel virtual address for the given object.
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//
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//go:nosplit
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func kernelAddr(obj interface{}) uintptr {
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e := (*eface)(unsafe.Pointer(&obj))
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return KernelStartAddress | uintptr(e.data)
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}
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// kernelFunc returns the address of the given function.
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//
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//go:nosplit
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func kernelFunc(fn func()) uintptr {
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fnptr := (**uintptr)(unsafe.Pointer(&fn))
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return KernelStartAddress | **fnptr
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}
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