Source file src/runtime/os_linux_mipsx.go

     1	// Copyright 2016 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	// +build linux
     6	// +build mips mipsle
     7	
     8	package runtime
     9	
    10	var randomNumber uint32
    11	
    12	func archauxv(tag, val uintptr) {
    13		switch tag {
    14		case _AT_RANDOM:
    15			// sysargs filled in startupRandomData, but that
    16			// pointer may not be word aligned, so we must treat
    17			// it as a byte array.
    18			randomNumber = uint32(startupRandomData[4]) | uint32(startupRandomData[5])<<8 |
    19				uint32(startupRandomData[6])<<16 | uint32(startupRandomData[7])<<24
    20		}
    21	}
    22	
    23	//go:nosplit
    24	func cputicks() int64 {
    25		// Currently cputicks() is used in blocking profiler and to seed fastrand().
    26		// nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
    27		// randomNumber provides better seeding of fastrand1.
    28		return nanotime() + int64(randomNumber)
    29	}
    30	
    31	const (
    32		_SS_DISABLE  = 2
    33		_NSIG        = 128 + 1
    34		_SI_USER     = 0
    35		_SIG_BLOCK   = 1
    36		_SIG_UNBLOCK = 2
    37		_SIG_SETMASK = 3
    38	)
    39	
    40	type sigset [4]uint32
    41	
    42	var sigset_all = sigset{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}
    43	
    44	//go:nosplit
    45	//go:nowritebarrierrec
    46	func sigaddset(mask *sigset, i int) {
    47		(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
    48	}
    49	
    50	func sigdelset(mask *sigset, i int) {
    51		(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
    52	}
    53	
    54	func sigfillset(mask *[4]uint32) {
    55		(*mask)[0], (*mask)[1], (*mask)[2], (*mask)[3] = ^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)
    56	}
    57	

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