}
	defer syscall.Close(fd)

	buf := bytes.Repeat([]byte{0xCD}, direntBufSize)
	for {
		n, err := syscall.ReadDirent(fd, buf)
		if err == syscall.EINVAL {
			// On linux, 'man getdents64' says that EINVAL indicates “result buffer is too small”.
			// Try a bigger buffer.
			t.Logf("ReadDirent: %v; retrying with larger buffer", err)
			buf = bytes.Repeat([]byte{0xCD}, len(buf)*2)
			continue
		}
		if err != nil {

	},
	{
		"truncated dict",
		"",
		[]byte{0x78, 0xbb},
		[]byte{0x00},
		io.ErrUnexpectedEOF,
	},
	{
		"truncated checksum",
		"",
		[]byte{0x78, 0xbb, 0x00, 0x01, 0x00, 0x01, 0xca, 0x48,
			0xcd, 0xc9, 0xc9, 0xd7, 0x51, 0x28, 0xcf, 0x2f,
			0xca, 0x49, 0x01, 0x04, 0x00, 0x00, 0xff, 0xff,
		},
		[]byte{0x00},
		io.ErrUnexpectedEOF,
	},
	{
		"empty",
		"",

	0x35, 0xfe, 0xaa, 0x3f, 0xe7, 0x29, 0x98, 0x65, 0x4b, 0xb3, 0x4f, 0xdc, 0xe6, 0x96, 0xe4, 0x16,
	0xe1, 0xff, 0x33, 0xd9, 0xec, 0x20, 0x63, 0xd7, 0x14, 0x1b, 0xa8, 0x14, 0x43, 0x5e, 0x24, 0x52,
	0xf1, 0x97, 0xc7, 0x65, 0x0e, 0x8a, 0xcd, 0x17, 0x50, 0xe4, 0x50, 0xf3, 0x57, 0xc5, 0xad, 0xde,
	0xd6, 0x2e, 0x47, 0xa8, 0xb1, 0xdf, 0x11, 0xd7, 0x51, 0xb5, 0x4b, 0x83, 0xf0, 0xa1, 0xf7, 0x14,

		pc := uintptr(c.rip())
		// OS X will leave the pc just after the INT 3 instruction.
		// INT 3 is usually 1 byte, but there is a 2-byte form.
		code := (*[2]byte)(unsafe.Pointer(pc - 2))
		if code[1] != 0xCC && (code[0] != 0xCD || code[1] != 3) {
			// SIGTRAP on something other than INT 3.
			c.set_sigcode(_SI_USER)
		}

	case _SIGSEGV:
		// x86-64 has 48-bit virtual addresses. The top 16 bits must echo bit 47.

	BYTE $0x44; BYTE $0x45; BYTE $0x42; BYTE $0x46
	BYTE $0x43; BYTE $0x47; BYTE $0x9c; BYTE $0x48
	BYTE $0x54; BYTE $0x51; BYTE $0x52; BYTE $0x53
	BYTE $0x58; BYTE $0x55; BYTE $0x56; BYTE $0x57
	BYTE $0x8c; BYTE $0x49; BYTE $0xcd; BYTE $0xce
	BYTE $0xcb; BYTE $0xcf; BYTE $0xcc; BYTE $0xe1
	BYTE $0x70; BYTE $0xdd; BYTE $0xde; BYTE $0xdb
	BYTE $0xdc; BYTE $0x8d; BYTE $0x8e; BYTE $0xdf

retry:
	WORD $0xB9931022 // TROO 2,2,b'0001'

	0xcb, 0xcc, 0xd7, 0x4f, 0x2c, 0xc8, 0xcc, 0x4d, 0x4c, 0xce, 0xc8, 0xcc, 0x4b, 0x2d, 0xaa, 0xd4,
	0x2f, 0xc8, 0x4e, 0xd7, 0x2f, 0x2d, 0xc9, 0xcc, 0xd1, 0xcf, 0xcc, 0x2b, 0x29, 0x2e, 0x29, 0xd2,
	0x4f, 0x4f, 0xcd, 0x4b, 0x2d, 0x4a, 0x2c, 0x49, 0x4d, 0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17,
	0x52, 0x86, 0x68, 0xd2, 0x43, 0xd6, 0xa4, 0x57, 0x90, 0x9d, 0xae, 0x07, 0xd2, 0xa4, 0x07, 0xd1,

		0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x01,
		0x01, 0x00, 0x01, 0xff, 0x00, 0x01, 0x00, 0x00,
		0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0xff, 0x01,
	},
	{
		0xcd, 0xff, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01,
		0x03, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
		0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00,
		0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,