//TODO LDTRSW 0x1e(LR), R5                 // c5eb81b8
	//TODO LDUR 0xbf(R13), R1                  // a1f14bb8
	//TODO LDUR -0x3c(R22), R3                 // c3425cf8
	//TODO LDURB -0xff(R17), R14               // 2e125038
	//TODO LDURH 0x80(R1), R6                  // 26004878
	//TODO LDURSB 0xde(LR), R3                 // c3e3cd38
	//TODO LDURSB 0x96(R9), R7                 // 27618938

	if err != nil {
		t.Fatal(err)
	}
	fis, err := td.Readdir(0)
	if err != nil {
		t.Fatal(err)
	}
	for _, fi := range fis {
		if !fi.IsDir() {
			continue
		}

		// TODO(gri) remove extra pkg directory eventually
		goldenFile := filepath.Join("testdata", "src", "pkg", fi.Name(), "golden.txt")
		w := NewWalker(nil, "testdata/src/pkg")
		pkg, _ := w.import_(fi.Name())
		w.export(pkg)

	MOVQ 2147483647+1(AX), AX       // ERROR "offset too large"
	MOVQ 3395469782(R10), R8        // ERROR "offset too large"
	LEAQ 3395469782(AX), AX         // ERROR "offset too large"
	ADDQ 3395469782(AX), AX         // ERROR "offset too large"
	ADDL 3395469782(AX), AX         // ERROR "offset too large"
	ADDW 3395469782(AX), AX         // ERROR "offset too large"
	LEAQ 433954697820(AX), AX       // ERROR "offset too large"

	if runtime.Compiler != "gc" {
		// The exact function names are not going to be the same.
		t.Skip("skipping for non-gc toolchain")
	}
	if runtime.GOARCH != "amd64" {
		// TODO: support SEH on other architectures.
		t.Skip("skipping on non-amd64")
	}
	// Only frames in the test package are checked.
	want := []string{
		"test._Cfunc_backtrace",
		"test.testCallbackCallersSEH.func1.1",

	}
	return tw.writeRawHeader(blk, hdr.Size, hdr.Typeflag)
}

func (tw *Writer) writePAXHeader(hdr *Header, paxHdrs map[string]string) error {
	realName, realSize := hdr.Name, hdr.Size

	// TODO(dsnet): Re-enable this when adding sparse support.
	// See https://golang.org/issue/22735
	/*
		// Handle sparse files.
		var spd sparseDatas
		var spb []byte
		if len(hdr.SparseHoles) > 0 {

	{"(0*4)(BP)", "(BP)"},
	{"(1*4)(DI)", "4(DI)"},
	{"(4*4)(BP)", "16(BP)"},
	{"(AX)", "(AX)"},
	{"(BP)(CX*4)", "(BP)(CX*4)"},
	{"(BP*8)", "0(BP*8)"},
	{"(BX)", "(BX)"},
	{"(SP)", "(SP)"},
	{"*AX", "AX"}, // TODO: Should make * illegal here; a simple alias for JMP AX.
	{"*runtime·_GetStdHandle(SB)", "*runtime._GetStdHandle(SB)"},
	{"-(4+12)(DI)", "-16(DI)"},
	{"-1(DI)(BX*1)", "-1(DI)(BX*1)"},
	{"-96(DI)(BX*1)", "-96(DI)(BX*1)"},

then an `api/next` file with the line

    pkg net/http, function F #12345

should have a corresponding file named `doc/next/6-stdlib/99-minor/net/http/12345.md`.
At a minimum, that file should contain either a full sentence or a TODO,
ideally referring to a person with the responsibility to complete the note.

Use the following forms in your markdown:

	[http.Request]                     # symbol documentation; auto-linked as in Go doc strings

	MOVWZ $-2147483648, R5          // 3ca08000

	// TODO: These are preprocessed by the assembler into MOVD $const>>shift, R5; SLD $shift, R5.
	//       This only captures the MOVD. Should the SLD be appended to the encoding by the test?
	// Hex constant 0x20004000000
	MOVD $2199090364416, R5         // 60058001
	// Hex constant 0xFFFFFE0004000000
	MOVD $-2198956146688, R5        // 38a08001

	return messWith("crc32-not-streamed.zip", func(b []byte) {
		// Corrupt foo.txt's final crc32 byte, in both
		// the file header and TOC. (0x7e -> 0x7f)
		b[0x11]++
		b[0x9d]++

		// TODO(bradfitz): add a new test that only corrupts
		// one of these values, and verify that that's also an
		// error. Currently, the reader code doesn't verify the
		// fileheader and TOC's crc32 match if they're both

				typedef[sub.Go.(*ast.Ident).Name].C = t.C
			}

			// If we've seen this typedef before, and it
			// was an anonymous struct/union/class before
			// too, use the old definition.
			// TODO: it would be safer to only do this if
			// we verify that the types are the same.
			if oldType != nil && isStructUnionClass(oldType.Go) {
				t.Go = oldType.Go
			}
		}