}

// intFromReg loads an argSize sized integer from reg and places it at to.
//
// argSize must be non-zero, fit in a register, and a power-of-two.
func intFromReg(r *abi.RegArgs, reg int, argSize uintptr, to unsafe.Pointer) {
	memmove(to, r.IntRegArgAddr(reg, argSize), argSize)
}

// intToReg loads an argSize sized integer and stores it into reg.
//
// argSize must be non-zero, fit in a register, and a power-of-two.

	}
	argp := a.data
	var argSize uintptr
	if argp != nil {
		argSize = (*ptrtype)(unsafe.Pointer(a._type)).Elem.Size_
	}

	h := new(debugCallHandler)
	h.gp = gp
	// gp may not be running right now, but we can still get the M
	// it will run on since it's locked.
	h.mp = gp.lockedm.ptr()
	h.fv, h.regArgs, h.argp, h.argSize = fv, regArgs, argp, argSize

	// Write the argument frame size.
	*(*uintptr)(unsafe.Pointer(uintptr(sp - 32))) = h.argSize
	// Save current registers.
	h.sigCtxt.savedRegs = *ctxt.cregs()
}

// case 0
func (h *debugCallHandler) debugCallRun(ctxt *sigctxt) {
	sp := ctxt.sp()
	memmove(unsafe.Pointer(uintptr(sp)+32), h.argp, h.argSize)
	if h.regArgs != nil {
		storeRegArgs(ctxt.cregs(), h.regArgs)
	}

func FuncLayout(t Type, rcvr Type) (frametype Type, argSize, retOffset uintptr, stack, gc, inReg, outReg []byte, ptrs bool) {
	var ft *abi.Type
	var abid abiDesc
	if rcvr != nil {
		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.common())), rcvr.common())
	} else {
		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.(*rtype))), nil)
	}
	// Extract size information.
	argSize = abid.stackCallArgsSize
	retOffset = abid.retOffset

		p.errorf("TEXT %q: ABIInternal requires NOSPLIT", name)
	}

	// Next operand is the frame and arg size.
	// Bizarre syntax: $frameSize-argSize is two words, not subtraction.
	// Both frameSize and argSize must be simple integers; only frameSize
	// can be negative.
	// The "-argSize" may be missing; if so, set it to objabi.ArgsSizeUnknown.
	// Parse left to right.
	op := operands[next]
	if len(op) < 2 || op[0].ScanToken != '$' {

// no pointers to heap objects in its local stack variables.
#define NO_LOCAL_POINTERS	FUNCDATA $FUNCDATA_LocalsPointerMaps, no_pointers_stackmap(SB)

// ArgsSizeUnknown is set in Func.argsize to mark all functions
// whose argument size is unknown (C vararg functions, and
// assembly code without an explicit specification).
// This value is generated by the compiler, assembler, or linker.

		{name: "CALLtail", argLength: -1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true, tailCall: true},                                 // tail call static function aux.(*obj.LSym).  last arg=mem, auxint=argsize, returns mem

		// of uinptrs this function consumes. Store the argsize and discard
		// the %n suffix if any.
		m.argsize = -1
		extName := ldr.SymExtname(s)
		if i := strings.IndexByte(extName, '%'); i >= 0 {
			var err error
			m.argsize, err = strconv.Atoi(extName[i+1:])
			if err != nil {
				ctxt.Errorf(s, "failed to parse stdcall decoration: %v", err)
			}
			m.argsize *= ctxt.Arch.PtrSize

	FuncID_runtime_main
	FuncID_sigpanic
	FuncID_systemstack
	FuncID_systemstack_switch
	FuncIDWrapper // any autogenerated code (hash/eq algorithms, method wrappers, etc.)
)

// ArgsSizeUnknown is set in Func.argsize to mark all functions
// whose argument size is unknown (C vararg functions, and
// assembly code without an explicit specification).
// This value is generated by the compiler, assembler, or linker.

		{name: "CALLtail", argLength: -1, reg: call, aux: "CallOff", call: true, tailCall: true}, // tail call static function aux.(*gc.Sym). last arg=mem, auxint=argsize, returns mem
		{name: "CALLclosure", argLength: -1, reg: callClosure, aux: "CallOff", call: true},       // call function via closure. arg0=codeptr, arg1=closure, last arg=mem, auxint=argsize, returns mem