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https://github.com/golang/go
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6820be25da
Change-Id: I0e95f8a5962c547da20e19a356ae1cf8375c9107 Reviewed-on: https://go-review.googlesource.com/1270 Reviewed-by: Russ Cox <rsc@golang.org>
36 lines
701 B
Go
36 lines
701 B
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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import "unsafe"
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const (
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_AT_NULL = 0
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_AT_RANDOM = 25
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_AT_SYSINFO = 32
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)
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var _vdso uint32
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func sysargs(argc int32, argv **byte) {
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// skip over argv, envv to get to auxv
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n := argc + 1
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for argv_index(argv, n) != nil {
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n++
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}
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n++
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auxv := (*[1 << 28]uint32)(add(unsafe.Pointer(argv), uintptr(n)*ptrSize))
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for i := 0; auxv[i] != _AT_NULL; i += 2 {
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switch auxv[i] {
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case _AT_SYSINFO:
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_vdso = auxv[i+1]
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case _AT_RANDOM:
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startupRandomData = (*[16]byte)(unsafe.Pointer(uintptr(auxv[i+1])))[:]
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}
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}
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}
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