github.com/c0deoo1/golang1.5@v0.0.0-20220525150107-c87c805d4593/src/runtime/os_netbsd_arm.go (about)

     1  // Copyright 2013 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_R15] = uint32(funcPC(lwp_tramp))
    12  	mc.__gregs[_REG_R13] = uint32(uintptr(stk))
    13  	mc.__gregs[_REG_R0] = uint32(uintptr(unsafe.Pointer(mp)))
    14  	mc.__gregs[_REG_R1] = uint32(uintptr(unsafe.Pointer(gp)))
    15  	mc.__gregs[_REG_R2] = uint32(fn)
    16  }
    17  
    18  func checkgoarm() {
    19  	// TODO(minux)
    20  }
    21  
    22  //go:nosplit
    23  func cputicks() int64 {
    24  	// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand1().
    25  	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
    26  	// TODO: need more entropy to better seed fastrand1.
    27  	return nanotime()
    28  }