1 // Copyright 2014 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 package sys 6 7 // Declarations for runtime services implemented in C or assembly. 8 9 const PtrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const 10 const RegSize = 4 << (^Uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const 11 const SpAlign = 1*(1-GoarchArm64) + 16*GoarchArm64 // SP alignment: 1 normally, 16 for ARM64 12 13 var DefaultGoroot string // set at link time 14 15 // AIX requires a larger stack for syscalls. 16 const StackGuardMultiplier = StackGuardMultiplierDefault*(1-GoosAix) + 2*GoosAix 17