| // Copyright 2009 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| package runtime | |
| import "unsafe" | |
| const ( | |
| _AT_NULL = 0 | |
| _AT_RANDOM = 25 | |
| _AT_SYSINFO = 32 | |
| ) | |
| var _vdso uint32 | |
| func sysargs(argc int32, argv **byte) { | |
| // skip over argv, envv to get to auxv | |
| n := argc + 1 | |
| for argv_index(argv, n) != nil { | |
| n++ | |
| } | |
| n++ | |
| auxv := (*[1 << 28]uint32)(add(unsafe.Pointer(argv), uintptr(n)*ptrSize)) | |
| for i := 0; auxv[i] != _AT_NULL; i += 2 { | |
| switch auxv[i] { | |
| case _AT_SYSINFO: | |
| _vdso = auxv[i+1] | |
| case _AT_RANDOM: | |
| startupRandomData = (*[16]byte)(unsafe.Pointer(uintptr(auxv[i+1])))[:] | |
| } | |
| } | |
| } |