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https://github.com/golang/go
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2e32efc44a
Fixes #15148. Change-Id: If3b628f30521adeec1625689dbc98aaf4a9ec858 Reviewed-on: https://go-review.googlesource.com/22811 Reviewed-by: Keith Randall <khr@golang.org> Run-TryBot: Minux Ma <minux@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
// Copyright 2015 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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// +build linux
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// +build mips64 mips64le
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package runtime
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var randomNumber uint32
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func archauxv(tag, val uintptr) {
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switch tag {
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case _AT_RANDOM:
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// sysargs filled in startupRandomData, but that
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// pointer may not be word aligned, so we must treat
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// it as a byte array.
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randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
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uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
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}
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}
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//go:nosplit
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func cputicks() int64 {
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// Currently cputicks() is used in blocking profiler and to seed fastrand1().
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// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
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// randomNumber provides better seeding of fastrand1.
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return nanotime() + int64(randomNumber)
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}
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const (
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_SS_DISABLE = 2
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_NSIG = 65
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_SI_USER = 0
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_SIG_BLOCK = 1
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_SIG_UNBLOCK = 2
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_SIG_SETMASK = 3
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_RLIMIT_AS = 6
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)
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type sigset [2]uint64
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type rlimit struct {
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rlim_cur uintptr
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rlim_max uintptr
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}
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var sigset_all = sigset{^uint64(0), ^uint64(0)}
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func sigaddset(mask *sigset, i int) {
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(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
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}
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func sigdelset(mask *sigset, i int) {
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(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
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}
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func sigfillset(mask *[2]uint64) {
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(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)
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}
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func sigcopyset(mask *sigset, m sigmask) {
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(*mask)[0] = uint64(m[0]) | uint64(m[1])<<32
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}
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