// TODO(aix): find trap equivalent
func (c *sigctxt) trap() uint32 { return 0x0 }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 { return uint64(c.info.si_addr) }
func (c *sigctxt) fault() uintptr  { return uintptr(c.sigaddr()) }

func (c *sigctxt) set_r0(x uint64)   { c.regs().gpr[0] = x }
func (c *sigctxt) set_r12(x uint64)  { c.regs().gpr[12] = x }

func (c *sigctxt) ccr() uint64  { return c.regs().sc_cr }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 {
	return *(*uint64)(add(unsafe.Pointer(c.info), 16))
}
func (c *sigctxt) fault() uintptr { return uintptr(c.sigaddr()) }

func (c *sigctxt) set_r0(x uint64)   { c.regs().sc_reg[0] = x }
func (c *sigctxt) set_r12(x uint64)  { c.regs().sc_reg[12] = x }

//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) rip() uint64 { return (uint64)(c.regs().sc_lr) } /* XXX */

func (c *sigctxt) fault() uintptr  { return uintptr(c.sigaddr()) }
func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 {
	return *(*uint64)(add(unsafe.Pointer(c.info), 16))
}

//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) pc() uint64 { return uint64(c.regs().sc_elr) }

//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) pc() uint64 { return c.regs().mc_gpregs.gp_elr }

func (c *sigctxt) fault() uintptr { return uintptr(c.info.si_addr) }

func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }

func (c *sigctxt) set_pc(x uint64)  { c.regs().mc_gpregs.gp_elr = x }
func (c *sigctxt) set_sp(x uint64)  { c.regs().mc_gpregs.gp_sp = x }

//go:nosplit
//go:nowritebarrierrec
func (c *sigctxt) pc() uint64 { return uint64(c.regs().sc_sepc) }

func (c *sigctxt) sigcode() uint64 { return uint64(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 {
	return *(*uint64)(add(unsafe.Pointer(c.info), 2*goarch.PtrSize))
}

func (c *sigctxt) set_pc(x uint64) { c.regs().sc_sepc = uintptr(x) }
func (c *sigctxt) set_ra(x uint64) { c.regs().sc_ra = uintptr(x) }

func (c *sigctxt) xer() uint64  { return c.regs().xer }
func (c *sigctxt) ccr() uint64  { return c.regs().ccr }

func (c *sigctxt) sigcode() uint32 { return uint32(c.info.si_code) }
func (c *sigctxt) sigaddr() uint64 { return c.info.si_addr }
func (c *sigctxt) fault() uintptr  { return uintptr(c.regs().dar) }

func (c *sigctxt) set_r0(x uint64)   { c.regs().gpr[0] = x }
func (c *sigctxt) set_r12(x uint64)  { c.regs().gpr[12] = x }

func (c *sigctxt) sigsp() uintptr { return uintptr(c.sp()) }
func (c *sigctxt) siglr() uintptr { return uintptr(c.ra()) }
func (c *sigctxt) fault() uintptr { return uintptr(c.sigaddr()) }

// preparePanic sets up the stack to look like a call to sigpanic.
func (c *sigctxt) preparePanic(sig uint32, gp *g) {
	// We arrange RA, and pc to pretend the panicking
	// function calls sigpanic directly.

		poll.CloseFunc(s)
		return nil, err
	}
	laddr := fd.addrFunc()(lsa)
	raddr := fd.addrFunc()(rsa)
	fd.net = laddr.Network()
	if err := fd.init(); err != nil {
		fd.Close()
		return nil, err
	}
	fd.setAddr(laddr, raddr)
	return fd, nil
}

func fileConn(f *os.File) (Conn, error) {
	fd, err := newFileFD(f)
	if err != nil {
		return nil, err
	}
	switch fd.laddr.(type) {
	case *TCPAddr:

		{regAddr(REG_X6), Yxr},
		{regAddr(REG_X13), Yxr},
		{regAddr(REG_X20), YxrEvex},
		{regAddr(REG_X31), YxrEvex},
		{regAddr(REG_Y0), Yyr},
		{regAddr(REG_Y6), Yyr},
		{regAddr(REG_Y13), Yyr},
		{regAddr(REG_Y20), YyrEvex},
		{regAddr(REG_Y31), YyrEvex},
		{regAddr(REG_Z0), Yzr},
		{regAddr(REG_Z6), Yzr},
		{regAddr(REG_K0), Yk0},
		{regAddr(REG_K5), Yknot0},
		{regAddr(REG_K7), Yknot0},

	sa_flags    uint64
	sa_restorer uintptr
	sa_mask     uint64
}

type siginfoFields struct {
	si_signo int32
	si_errno int32
	si_code  int32
	// below here is a union; si_addr is the only field we use
	si_addr uint64
}

type siginfo struct {
	siginfoFields

	// Pad struct to the max size in the kernel.
	_ [_si_max_size - unsafe.Sizeof(siginfoFields{})]byte
}