github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/os_netbsd_arm64.go (about)

     1  // Copyright 2019 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 runtime
     6  
     7  import (
     8  	"internal/abi"
     9  	"unsafe"
    10  )
    11  
    12  func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
    13  	// Machine dependent mcontext initialisation for LWP.
    14  	mc.__gregs[_REG_ELR] = uint64(abi.FuncPCABI0(lwp_tramp))
    15  	mc.__gregs[_REG_X31] = uint64(uintptr(stk))
    16  	mc.__gregs[_REG_X0] = uint64(uintptr(unsafe.Pointer(mp)))
    17  	mc.__gregs[_REG_X1] = uint64(uintptr(unsafe.Pointer(mp.g0)))
    18  	mc.__gregs[_REG_X2] = uint64(fn)
    19  }
    20  
    21  //go:nosplit
    22  func cputicks() int64 {
    23  	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
    24  	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
    25  	return nanotime()
    26  }