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// 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
//go:nosplit
func linux_setup_vdso(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:
startup_random_data = (*byte)(unsafe.Pointer(uintptr(auxv[i+1])))
startup_random_data_len = 16
}
}
}
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