1 // Copyright 2015 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 mips64 mips64le 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 fastrand. 28 return nanotime() + int64(randomNumber) 29 } 30 31 const ( 32 _SS_DISABLE = 2 33 _NSIG = 129 34 _SI_USER = 0 35 _SIG_BLOCK = 1 36 _SIG_UNBLOCK = 2 37 _SIG_SETMASK = 3 38 _RLIMIT_AS = 6 39 ) 40 41 type sigset [2]uint64 42 43 type rlimit struct { 44 rlim_cur uintptr 45 rlim_max uintptr 46 } 47 48 var sigset_all = sigset{^uint64(0), ^uint64(0)} 49 50 //go:nosplit 51 //go:nowritebarrierrec 52 func sigaddset(mask *sigset, i int) { 53 (*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63) 54 } 55 56 func sigdelset(mask *sigset, i int) { 57 (*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63) 58 } 59 60 func sigfillset(mask *[2]uint64) { 61 (*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0) 62 } 63
