55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// Copyright 2011 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 (
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"runtime/internal/sys"
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"unsafe"
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)
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var executablePath string
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func sysargs(argc int32, argv **byte) {
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n := argc + 1
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// skip over argv, envp to get to auxv
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for argv_index(argv, n) != nil {
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n++
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}
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// skip NULL separator
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n++
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// now argv+n is auxv
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auxv := (*[1 << 28]uintptr)(add(unsafe.Pointer(argv), uintptr(n)*sys.PtrSize))
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sysauxv(auxv[:])
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}
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const (
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_AT_NULL = 0 // Terminates the vector
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_AT_PAGESZ = 6 // Page size in bytes
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_AT_SUN_EXECNAME = 2014 // exec() path name
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)
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func sysauxv(auxv []uintptr) {
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for i := 0; auxv[i] != _AT_NULL; i += 2 {
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tag, val := auxv[i], auxv[i+1]
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switch tag {
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case _AT_PAGESZ:
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physPageSize = val
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case _AT_SUN_EXECNAME:
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executablePath = gostringnocopy((*byte)(unsafe.Pointer(val)))
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}
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}
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}
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//go:linkname solarisExecutablePath os.solarisExecutablePath
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// solarisExecutablePath is called from the os package to fetch the
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// saved executable path.
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func solarisExecutablePath() string {
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return executablePath
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}
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