github.com/geraldss/go/src@v0.0.0-20210511222824-ac7d0ebfc235/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 "unsafe"
     8  
     9  func lwp_mcontext_init(mc *mcontextt, stk unsafe.Pointer, mp *m, gp *g, fn uintptr) {
    10  	// Machine dependent mcontext initialisation for LWP.
    11  	mc.__gregs[_REG_ELR] = uint64(funcPC(lwp_tramp))
    12  	mc.__gregs[_REG_X31] = uint64(uintptr(stk))
    13  	mc.__gregs[_REG_X0] = uint64(uintptr(unsafe.Pointer(mp)))
    14  	mc.__gregs[_REG_X1] = uint64(uintptr(unsafe.Pointer(mp.g0)))
    15  	mc.__gregs[_REG_X2] = uint64(fn)
    16  }
    17  
    18  //go:nosplit
    19  func cputicks() int64 {
    20  	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
    21  	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
    22  	return nanotime()
    23  }