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
5package runtime
6
7import (
8	"internal/abi"
9	"unsafe"
10)
11
12func 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
22func cputicks() int64 {
23	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
24	return nanotime()
25}
26