}
	memmove(dst, src, size)

	// Move pointers returned in registers to a place where the GC can see them.
	for i := range regs.Ints {
		if regs.ReturnIsPtr.Get(i) {
			regs.Ptrs[i] = unsafe.Pointer(regs.Ints[i])
		}
	}
}

// typedslicecopy should be an internal detail,
// but widely used packages access it using linkname.

	a.retPop = c.retPop

	// Convert from C to Go ABI.
	var regs abi.RegArgs
	var frame [callbackMaxFrame]byte
	goArgs := unsafe.Pointer(&frame)
	for _, part := range c.abiMap.parts {
		switch part.kind {
		case abiPartStack:
			memmove(add(goArgs, part.dstStackOffset), add(a.args, part.srcStackOffset), part.len)
		case abiPartReg:
			goReg := unsafe.Pointer(&regs.Ints[part.dstRegister])

	STMG	R6, R15, 48(R15)		// Save non-volatile regs.
	BL	runtime·load_g(SB)		// Saved by racecall.
	CMPBNE	R2, $0, rest			// raceGetProcCmd?
	MOVD	g_m(g), R2			// R2 = thread.
	MOVD	m_p(R2), R2			// R2 = processor.
	MVC	$8, p_raceprocctx(R2), (R3)	// *R3 = ThreadState *.
	LMG	48(R15), R6, R15		// Restore non-volatile regs.
	BR	R14				// Return to C.
rest:	MOVD	g_m(g), R4			// R4 = current thread.

			continue
		}
		argRegs = intArgRegs
		unlock(&finlock)
		if raceenabled {
			racefingo()
		}
		for fb != nil {
			for i := fb.cnt; i > 0; i-- {
				f := &fb.fin[i-1]

				var regs abi.RegArgs
				// The args may be passed in registers or on stack. Even for
				// the register case, we still need the spill slots.
				// TODO: revisit if we remove spill slots.
				//

	if cleanFuzzcache {
		fuzzDir := cache.Default().FuzzDir()
		if err := sh.RemoveAll(fuzzDir); err != nil {
			base.Error(err)
		}
	}
}

var cleaned = map[*load.Package]bool{}

// TODO: These are dregs left by Makefile-based builds.
// Eventually, can stop deleting these.
var cleanDir = map[string]bool{
	"_test": true,
	"_obj":  true,
}

var cleanFile = map[string]bool{
	"_testmain.go": true,

	iov.SetLen(int(unsafe.Sizeof(*regsout)))
	return ptracePtr(PTRACE_GETREGSET, pid, uintptr(_NT_PRSTATUS), unsafe.Pointer(&iov))
}

func PtraceSetRegs(pid int, regs *PtraceRegs) (err error) {
	var iov Iovec
	iov.Base = (*byte)(unsafe.Pointer(regs))
	iov.SetLen(int(unsafe.Sizeof(*regs)))
	return ptracePtr(PTRACE_SETREGSET, pid, uintptr(_NT_PRSTATUS), unsafe.Pointer(&iov))
}

func PtraceSetOptions(pid int, options int) (err error) {

		p.As = AMOVD
		p.From.Type = obj.TYPE_MEM
		p.From.Reg = REGSP
		p.From.Offset = 8
		p.To.Type = obj.TYPE_REG
		p.To.Reg = REG_R2
	}

	// The instructions which unspill regs should be preemptible.
	p = c.ctxt.EndUnsafePoint(p, c.newprog, -1)
	unspill := c.cursym.Func().UnspillRegisterArgs(p, c.newprog)

	// BR	start
	p = obj.Appendp(unspill, c.newprog)
	p.As = ABR