ldr.SetAttrLocal(s, true)
	ctxt.xdefine("runtime.egcdata", sym.SRODATA, ldr.SymAddr(s)+ldr.SymSize(s))
	ldr.SetSymSect(ldr.LookupOrCreateSym("runtime.egcdata", 0), ldr.SymSect(s))

	s = ldr.LookupOrCreateSym("runtime.gcbss", 0)
	ldr.SetAttrLocal(s, true)
	ctxt.xdefine("runtime.egcbss", sym.SRODATA, ldr.SymAddr(s)+ldr.SymSize(s))
	ldr.SetSymSect(ldr.LookupOrCreateSym("runtime.egcbss", 0), ldr.SymSect(s))

	// (LO) instruction sequences used to implement absolute relocations
	// on PPC64 prior to ISA 3.1 (P10). For consistency, maintain this
	// restriction for ISA 3.1 unless it becomes problematic.
	t := ldr.SymAddr(rs) + r.Add()
	if t < 0 || t >= 1<<31 {
		ldr.Errorf(s, "relocation for %s is too big (>=2G): 0x%x", ldr.SymName(s), ldr.SymValue(rs))
	}

func (c *sigctxt) fault() uintptr  { return uintptr(c.info.si_addr) }
func (c *sigctxt) trap() uint32    { return 0 }
func (c *sigctxt) error() uint32   { return 0 }
func (c *sigctxt) oldmask() uint32 { return 0 }

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

func (c *sigctxt) set_pc(x uint32)  { c.regs().__gregs[15] = x }

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

func (c *sigctxt) set_eip(x uint32)     { c.regs().mc_eip = x }
func (c *sigctxt) set_esp(x uint32)     { c.regs().mc_esp = x }
func (c *sigctxt) set_sigcode(x uint32) { c.info.si_code = int32(x) }

			continue
		}
		if v.Type.IsTuple() && v.Type.FieldType(1).IsMemory() {
			// We could handle this situation however it is likely
			// to be very rare.
			return false
		}
		if v.Op.SymEffect()&SymAddr != 0 {
			// This case prevents an operation that calculates the
			// address of a local variable from being forced to schedule
			// before its corresponding VarDef.
			// See issue 28445.
			//   v1 = LOAD ...

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_rip(x uint64)     { c.regs().mc_rip = x }
func (c *sigctxt) set_rsp(x uint64)     { c.regs().mc_rsp = x }
func (c *sigctxt) set_sigcode(x uint64) { c.info.si_code = int32(x) }

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_rip(x uint64)     { c.regs().mc_rip = x }
func (c *sigctxt) set_rsp(x uint64)     { c.regs().mc_rsp = x }
func (c *sigctxt) set_sigcode(x uint64) { c.info.si_code = int32(x) }

//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 c.regs().mc_gpregs.gp_sepc }

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_sepc = x }
func (c *sigctxt) set_ra(x uint64) { c.regs().mc_gpregs.gp_ra = x }
func (c *sigctxt) set_sp(x uint64) { c.regs().mc_gpregs.gp_sp = x }

// 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 }