scale             uint8     // amd64/386 indexed load scale
}

type inputInfo struct {
	idx  int     // index in Args array
	regs regMask // allowed input registers
}

type outputInfo struct {
	idx  int     // index in output tuple
	regs regMask // allowed output registers
}

type regInfo struct {
	// inputs encodes the register restrictions for an instruction's inputs.

// the caller's frame due to issue #43228.
TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
	// Start with standard C stack frame layout and linkage, allocate
	// 32 bytes of argument space, save callee-save regs, and set R0 to $0.
	STACK_AND_SAVE_HOST_TO_GO_ABI(32)
	// The above will not preserve R2 (TOC). Save it in case Go is
	// compiled without a TOC pointer (e.g -buildmode=default).
	MOVD	R2, 24(R1)

	// Load the current g.

	s.Ctim = Timespec{int64(st.Ctime), int64(st.Ctime_nsec)}
	s.Blksize = st.Blksize
	s.Blocks = st.Blocks
}

func (r *PtraceRegs) PC() uint64 { return r.Regs[64] }

func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = pc }

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint64(length)
}

func (msghdr *Msghdr) SetControllen(length int) {
	msghdr.Controllen = uint64(length)
}

}

type sigactiont struct {
	sa_flags  int32
	pad_cgo_0 [4]byte
	_funcptr  [8]byte
	sa_mask   sigset
}

type fpregset struct {
	fp_reg_set [528]byte
}

type mcontext struct {
	gregs  [28]int64
	fpregs fpregset
}

type ucontext struct {
	uc_flags    uint64
	uc_link     *ucontext
	uc_sigmask  sigset
	uc_stack    stackt
	pad_cgo_0   [8]byte
	uc_mcontext mcontext

	}

	_, _, errno = RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
	return errno
}

func (r *PtraceRegs) PC() uint64 { return uint64(r.Regs[64]) }

func (r *PtraceRegs) SetPC(pc uint64) { r.Regs[64] = uint32(pc) }

func (iov *Iovec) SetLen(length int) {
	iov.Len = uint32(length)
}

func (msghdr *Msghdr) SetControllen(length int) {
	msghdr.Controllen = uint32(length)

}

type stackt struct {
	ss_sp     *byte
	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type sigcontext struct {
	fault_address uint64
	/* AArch64 registers */
	regs       [31]uint64
	sp         uint64
	pc         uint64
	pstate     uint64
	_pad       [8]byte // __attribute__((__aligned__(16)))
	__reserved [4096]byte
}

type sockaddr_un struct {
	family uint16

	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type sigcontext struct {
	_unused     [4]uint64
	signal      int32
	_pad0       int32
	handler     uint64
	oldmask     uint64
	regs        *ptregs
	gp_regs     [48]uint64
	fp_regs     [33]float64
	v_regs      *vreg
	vmx_reserve [101]int64
}

type ucontext struct {
	uc_flags    uint64
	uc_link     *ucontext
	uc_stack    stackt

	a.retPop = c.retPop

	// Convert from C to Go ABI.
	var regs abi.RegArgs
	var frame [callbackMaxFrame]byte
	goArgs := unsafe.Pointer(&frame)
	for _, part := range c.abiMap.parts {
		switch part.kind {
		case abiPartStack:
			memmove(add(goArgs, part.dstStackOffset), add(a.args, part.srcStackOffset), part.len)
		case abiPartReg:
			goReg := unsafe.Pointer(&regs.Ints[part.dstRegister])

	STMG	R6, R15, 48(R15)		// Save non-volatile regs.
	BL	runtime·load_g(SB)		// Saved by racecall.
	CMPBNE	R2, $0, rest			// raceGetProcCmd?
	MOVD	g_m(g), R2			// R2 = thread.
	MOVD	m_p(R2), R2			// R2 = processor.
	MVC	$8, p_raceprocctx(R2), (R3)	// *R3 = ThreadState *.
	LMG	48(R15), R6, R15		// Restore non-volatile regs.
	BR	R14				// Return to C.
rest:	MOVD	g_m(g), R4			// R4 = current thread.

	significand [4]uint16
	exponent    uint16
}

type stackt struct {
	ss_sp     *byte
	ss_flags  int32
	pad_cgo_0 [4]byte
	ss_size   uintptr
}

type mcontext struct {
	gregs       [23]uint64
	fpregs      *fpstate
	__reserved1 [8]uint64
}

type ucontext struct {
	uc_flags     uint64
	uc_link      *ucontext
	uc_stack     stackt
	uc_mcontext  mcontext