BPF_H                                       = 0x8
	BPF_IMM                                     = 0x0
	BPF_IND                                     = 0x40
	BPF_JA                                      = 0x0
	BPF_JCOND                                   = 0xe0
	BPF_JEQ                                     = 0x10
	BPF_JGE                                     = 0x30
	BPF_JGT                                     = 0x20

var nop = [][16]uint8{
	{0x90},
	{0x66, 0x90},
	{0x0F, 0x1F, 0x00},
	{0x0F, 0x1F, 0x40, 0x00},
	{0x0F, 0x1F, 0x44, 0x00, 0x00},
	{0x66, 0x0F, 0x1F, 0x44, 0x00, 0x00},
	{0x0F, 0x1F, 0x80, 0x00, 0x00, 0x00, 0x00},
	{0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
	{0x66, 0x0F, 0x1F, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00},
}

// Native Client rejects the repeated 0x66 prefix.

	if z.OldDataDir == "" {
		zb0001Len--
		zb0001Mask |= 0x10
	}
	// variable map header, size zb0001Len
	o = append(o, 0x80|uint8(zb0001Len))
	if zb0001Len == 0 {
		return
	}
	// string "BaseOptions"
	o = append(o, 0xab, 0x42, 0x61, 0x73, 0x65, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73)
	// map header, size 0
	_ = z.BaseOptions
	o = append(o, 0x80)
	// string "r"
	o = append(o, 0xa1, 0x72)

	0xeb, 0xff, 0x42, 0x88, 0x21, 0xc4, 0x00, 0x00,
	0x14, 0x00, 0xeb, 0xff, 0x42, 0x88, 0x21, 0xc4,
	0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00,
	0x00, 0xff, 0xff, 0x00, 0x17, 0x00, 0xe8, 0xff,
	0x42, 0x88, 0x21, 0xc4, 0x00, 0x00, 0x00, 0x00,
	0xff, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00,
	0x17, 0x00, 0xe8, 0xff, 0x42, 0x12, 0x46, 0x16,
	0x06, 0x00, 0x00, 0x00, 0xff, 0xff, 0x01, 0x08,

	ALDADDAD:  3<<30 | 0x1c5<<21 | 0x00<<10,
	ALDADDAW:  2<<30 | 0x1c5<<21 | 0x00<<10,
	ALDADDAH:  1<<30 | 0x1c5<<21 | 0x00<<10,
	ALDADDAB:  0<<30 | 0x1c5<<21 | 0x00<<10,
	ALDADDALD: 3<<30 | 0x1c7<<21 | 0x00<<10,
	ALDADDALW: 2<<30 | 0x1c7<<21 | 0x00<<10,
	ALDADDALH: 1<<30 | 0x1c7<<21 | 0x00<<10,
	ALDADDALB: 0<<30 | 0x1c7<<21 | 0x00<<10,
	ALDADDD:   3<<30 | 0x1c1<<21 | 0x00<<10,
	ALDADDW:   2<<30 | 0x1c1<<21 | 0x00<<10,

		}, {
			derBytes: []byte{
				0x30, 9, // SEQUENCE
				0x02, 1, // INTEGER, 1 byte
				17,
				0x02, 4, // INTEGER, 4 bytes
				0x7f, 0xff, 0xff, 0xff,
			},
		}, {
			derBytes: []byte{
				0x30, 10, // SEQUENCE
				0x02, 1, // INTEGER, 1 byte
				17,
				0x02, 5, // INTEGER, 5 bytes
				0x00, 0x80, 0x00, 0x00, 0x00,
			},
			// On 64-bit systems, encoding/asn1 will accept the

	SYS_FREXP                           = 0x1D  // 29
	SYS_LDEXP                           = 0x1E  // 30
	SYS_CEIL                            = 0x1F  // 31
	SYS_POW                             = 0x20  // 32
	SYS_SQRT                            = 0x21  // 33
	SYS_FLOOR                           = 0x22  // 34
	SYS_J1                              = 0x23  // 35
	SYS_FABS                            = 0x24  // 36

	{0x4d, 0x5a, 0x90, 0x00, 0x03, 0x00},      // PE (Windows) as generated by 6l/8l and gcc
	{0x4d, 0x5a, 0x78, 0x00, 0x01, 0x00},      // PE (Windows) as generated by llvm for dll
	{0x00, 0x00, 0x01, 0xEB},                  // Plan 9 i386
	{0x00, 0x00, 0x8a, 0x97},                  // Plan 9 amd64
	{0x00, 0x00, 0x06, 0x47},                  // Plan 9 arm
	{0x00, 0x61, 0x73, 0x6D},                  // WASM

					bi := int16((out[0] >> 16) & 31)
					invertible := false

					if bo&0x14 == 0x14 {
						// A conditional branch that is unconditionally taken. This cannot be inverted.
					} else if bo&0x10 == 0x10 {
						// A branch based on the value of CTR. Invert the CTR comparison against zero bit.
						bo ^= 0x2
						invertible = true
					} else if bo&0x04 == 0x04 {

			case sys.I386:
				rel.AddUint8(0xff)
				rel.AddUint8(0x25)
				rel.AddAddrPlus(ctxt.Arch, targ, 0)
				rel.AddUint8(0x90)
				rel.AddUint8(0x90)
			case sys.AMD64:
				rel.AddUint8(0xff)
				rel.AddUint8(0x24)
				rel.AddUint8(0x25)
				rel.AddAddrPlus4(ctxt.Arch, targ, 0)
				rel.AddUint8(0x90)
			}
		} else if tplt >= 0 {
			if su == nil {
				su = ctxt.loader.MakeSymbolUpdater(s)
			}