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Source file src/runtime/os_linux_mipsx.go

Documentation: runtime

  // Copyright 2016 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.
  
  // +build linux
  // +build mips mipsle
  
  package runtime
  
  var randomNumber uint32
  
  func archauxv(tag, val uintptr) {
  	switch tag {
  	case _AT_RANDOM:
  		// sysargs filled in startupRandomData, but that
  		// pointer may not be word aligned, so we must treat
  		// it as a byte array.
  		randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
  			uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
  	}
  }
  
  //go:nosplit
  func cputicks() int64 {
  	// Currently cputicks() is used in blocking profiler and to seed fastrand().
  	// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
  	// randomNumber provides better seeding of fastrand1.
  	return nanotime() + int64(randomNumber)
  }
  
  const (
  	_SS_DISABLE  = 2
  	_NSIG        = 128 + 1
  	_SI_USER     = 0
  	_SIG_BLOCK   = 1
  	_SIG_UNBLOCK = 2
  	_SIG_SETMASK = 3
  	_RLIMIT_AS   = 6
  )
  
  type sigset [4]uint32
  
  type rlimit struct {
  	rlim_cur uintptr
  	rlim_max uintptr
  }
  
  var sigset_all = sigset{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}
  
  //go:nosplit
  //go:nowritebarrierrec
  func sigaddset(mask *sigset, i int) {
  	(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
  }
  
  func sigdelset(mask *sigset, i int) {
  	(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
  }
  
  func sigfillset(mask *[4]uint32) {
  	(*mask)[0], (*mask)[1], (*mask)[2], (*mask)[3] = ^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)
  }
  

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