data []byte     // raw memory for the function
}

// funcData returns the ith funcData in t.functab.
func (t *LineTable) funcData(i uint32) funcData {
	data := t.funcdata[t.funcTab().funcOff(int(i)):]
	return funcData{t: t, data: data}
}

// IsZero reports whether f is the zero value.
func (f funcData) IsZero() bool {
	return f.t == nil && f.data == nil
}

			}
		}

		// Write funcdata refs as offsets from go:func.* and go:funcrel.*.
		funcdata = funcData(ldr, s, fi, inlSyms[s], funcdata)
		// Missing funcdata will be ^0. See runtime/symtab.go:funcdata.
		off = int64(startLocations[i] + funcSize + numPCData(ldr, s, fi)*4)
		for j := range funcdata {
			dataoff := off + int64(4*j)
			fdsym := funcdata[j]

			case "no_pointers_stackmap":
				if p.From.Type != TYPE_CONST || p.From.Offset != abi.FUNCDATA_LocalsPointerMaps {
					ctxt.Diag("%s: FUNCDATA use of no_pointers_stackmap(SB) without FUNCDATA_LocalsPointerMaps", p.Pos)
				}
				// funcdata for functions with no local variables in frame.
				// Define two zero-length bitmaps, because the same index is used

	switch goarch.ArchFamily {
	case goarch.ARM64:
		minsize = sys.StackAlign
	default:
		minsize = sys.MinFrameSize
	}
	if size > minsize {
		stackid := pcdata
		stkmap := (*stackmap)(funcdata(f, abi.FUNCDATA_LocalsPointerMaps))
		if stkmap == nil || stkmap.n <= 0 {
			print("runtime: frame ", funcname(f), " untyped locals ", hex(frame.varp-size), "+", hex(size), "\n")
			throw("missing stackmap")
		}

// return the number of aux symbols s have.
func nAuxSym(s *LSym) int {
	n := 0
	if s.Gotype != nil {
		n++
	}
	if fn := s.Func(); fn != nil {
		// FuncInfo is an aux symbol, each Funcdata is an aux symbol
		n += 1 + len(fn.Pcln.Funcdata)
		if fn.dwarfInfoSym != nil && fn.dwarfInfoSym.Size != 0 {
			n++
		}
		if fn.dwarfLocSym != nil && fn.dwarfLocSym.Size != 0 {
			n++
		}

	p.append(prog, "", true)
}

// asmFuncData assembles a FUNCDATA pseudo-op.
// FUNCDATA $1, funcdata<>+4(SB)
func (p *Parser) asmFuncData(operands [][]lex.Token) {
	if len(operands) != 2 {
		p.errorf("expect two operands for FUNCDATA")
		return
	}

	// Operand 0 must be an immediate constant.
	valueAddr := p.address(operands[0])
	if !p.validImmediate("FUNCDATA", &valueAddr) {
		return
	}

	//
	// pcdata [npcdata]uint32

	// funcdata contains the offset past moduledata.gofunc which contains a
	// pointer to that index's funcdata. e.g.,
	// *(moduledata.gofunc +  _func.funcdata[_FUNCDATA_ArgsPointerMaps]) is
	// the argument pointer map.
	//
	// An offset of ^uint32(0) indicates that there is no entry.
	//
	// funcdata [nfuncdata]uint32
}

}

// funcdata returns a pointer to the ith funcdata for f.
// funcdata should be kept in sync with cmd/link:writeFuncs.
func funcdata(f funcInfo, i uint8) unsafe.Pointer {
	if i < 0 || i >= f.nfuncdata {
		return nil
	}
	base := f.datap.gofunc // load gofunc address early so that we calculate during cache misses

	0x000f 00015 (x.go:3)	SUBQ	$16, SP
	0x0013 00019 (x.go:3)	MOVQ	BP, 8(SP)
	0x0018 00024 (x.go:3)	LEAQ	8(SP), BP
	0x001d 00029 (x.go:3)	FUNCDATA	$0, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
	0x001d 00029 (x.go:3)	FUNCDATA	$1, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
	0x001d 00029 (x.go:3)	FUNCDATA	$2, gclocals·33cdeccccebe80329f1fdbee7f5874cb(SB)
	0x001d 00029 (x.go:4)	PCDATA	$0, $0
	0x001d 00029 (x.go:4)	PCDATA	$1, $0

		// stackmap for this function. It is likely that we are looking
		// at the function prologue, assume so and hope for the best.
		pcdata = 0
	}
	stkmap := (*stackmap)(funcdata(f, abi.FUNCDATA_LocalsPointerMaps))

	var bv bitvector
	if stkmap != nil && stkmap.n > 0 {
		bv = stackmapdata(stkmap, pcdata)
	} else {
		bv.n = -1
	}

	// Dump main body of stack frame.