mirror of
https://github.com/golang/go
synced 2024-11-06 12:36:22 -07:00
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
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// Copyright 2016 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 mips mipsle
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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 fastrand().
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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 = 128 + 1
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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 [4]uint32
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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{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}
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//go:nosplit
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//go:nowritebarrierrec
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func sigaddset(mask *sigset, i int) {
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(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
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}
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func sigdelset(mask *sigset, i int) {
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(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
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}
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func sigfillset(mask *[4]uint32) {
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(*mask)[0], (*mask)[1], (*mask)[2], (*mask)[3] = ^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)
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}
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