// Spills/loads arguments in registers to/from an internal/abi.RegArgs
// respectively. Does not follow the Go ABI.
func spillArgs()
func unspillArgs()

// getfp returns the frame pointer register of its caller or 0 if not implemented.
// TODO: Make this a compiler intrinsic

// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

TEXT	·getFP(SB), NOSPLIT|NOFRAME, $0-8
	MOVD	R29, ret+0(FP)

type gsignalStack struct{}

const preemptMSupported = false

func preemptM(mp *m) {
	// No threads, so nothing to do.
}

// getfp returns the frame pointer register of its caller or 0 if not implemented.
// TODO: Make this a compiler intrinsic
func getfp() uintptr { return 0 }

func setProcessCPUProfiler(hz int32) {}
func setThreadCPUProfiler(hz int32)  {}
func sigdisable(uint32)              {}

// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

TEXT	·getFP(SB), NOSPLIT|NOFRAME, $0-8
	MOVQ	BP, ret+0(FP)

		} else if gp != nil {
			nstk += gcallers(gp, skip, pcBuf[1:])
		}
	} else {
		// Fast path: Unwind using frame pointers.
		pcBuf[0] = uintptr(skip)
		if getg() == gp {
			nstk += fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf[1:])
		} else if gp != nil {
			// Three cases:
			//
			// (1) We're called on the g0 stack through mcall(fn) or systemstack(fn). To
			// behave like gcallers above, we start unwinding from sched.bp, which

// getcallerfp returns the frame pointer of the caller of the caller
// of this function.
//
//go:nosplit
//go:noinline
func getcallerfp() uintptr {
	fp := getfp() // This frame's FP.
	if fp != 0 {
		fp = *(*uintptr)(unsafe.Pointer(fp)) // The caller's FP.
		fp = *(*uintptr)(unsafe.Pointer(fp)) // The caller's caller's FP.
	}
	return fp

// FPCallers works like Callers and uses frame pointer unwinding to populate
// pcBuf with the return addresses of the physical frames on the stack.
func FPCallers(pcBuf []uintptr) int {
	return fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf)
}

const FramePointerEnabled = framepointer_enabled

var (
	IsPinned      = isPinned
	GetPinCounter = pinnerGetPinCounter
)

func SetPinnerLeakPanic(f func()) {

				// frame, whereas the saved frame pointer will give us the
				// caller's return address first (so, not including
				// saveblockevent)
				mp.profStack[0] -= 1
			}
			nstk += fpTracebackPCs(unsafe.Pointer(getfp()), mp.profStack[1:])
		} else {
			mp.profStack[1] = gp.m.curg.sched.pc
			nstk += 1 + fpTracebackPCs(unsafe.Pointer(gp.m.curg.sched.bp), mp.profStack[2:])
		}
	}

	JMP	runtime·goPanicSlice3CU<ABIInternal>(SB)
TEXT runtime·panicSliceConvert<ABIInternal>(SB),NOSPLIT,$0-16
	MOVD	R2, R0
	MOVD	R3, R1
	JMP	runtime·goPanicSliceConvert<ABIInternal>(SB)

TEXT ·getfp<ABIInternal>(SB),NOSPLIT|NOFRAME,$0
	MOVD R29, R0

TEXT runtime·retpolineR13(SB),NOSPLIT|NOFRAME,$0; RETPOLINE(13)
TEXT runtime·retpolineR14(SB),NOSPLIT|NOFRAME,$0; RETPOLINE(14)
TEXT runtime·retpolineR15(SB),NOSPLIT|NOFRAME,$0; RETPOLINE(15)

TEXT ·getfp<ABIInternal>(SB),NOSPLIT|NOFRAME,$0
	MOVQ BP, AX