c.floatParamRegs = paramFloatRegLOONG64
		c.FPReg = framepointerRegLOONG64
		c.LinkReg = linkRegLOONG64
		c.hasGReg = true
	case "s390x":
		c.PtrSize = 8
		c.RegSize = 8
		c.lowerBlock = rewriteBlockS390X
		c.lowerValue = rewriteValueS390X
		c.registers = registersS390X[:]
		c.gpRegMask = gpRegMaskS390X
		c.fpRegMask = fpRegMaskS390X
		c.FPReg = framepointerRegS390X
		c.LinkReg = linkRegS390X

type Reg struct {
	Ra      uint64
	Sp      uint64
	Gp      uint64
	Tp      uint64
	T       [7]uint64
	S       [12]uint64
	A       [8]uint64
	Sepc    uint64
	Sstatus uint64
}

type FpReg struct {
	X    [32][2]uint64
	Fcsr uint64
}

type FpExtendedPrecision struct{}

type PtraceIoDesc struct {
	Op   int32
	Offs uintptr
	Addr *byte
	Len  uint64
}

	Edx    uint32
	Ecx    uint32
	Eax    uint32
	Trapno uint32
	Err    uint32
	Eip    uint32
	Cs     uint32
	Eflags uint32
	Esp    uint32
	Ss     uint32
	Gs     uint32
}

type FpReg struct {
	Env   [7]uint32
	Acc   [8][10]uint8
	Ex_sw uint32
	Pad   [64]uint8
}

type FpExtendedPrecision struct{}

type PtraceIoDesc struct {
	Op   int32
	Offs uintptr
	Addr *byte

}

type Sigset_t struct {
	Val [4]uint32
}

type Reg struct {
	X    [30]uint64
	Lr   uint64
	Sp   uint64
	Elr  uint64
	Spsr uint32
	_    [4]byte
}

type FpReg struct {
	Q  [32][16]uint8
	Sr uint32
	Cr uint32
	_  [8]byte
}

type FpExtendedPrecision struct{}

type PtraceIoDesc struct {
	Op   int32
	Offs uintptr
	Addr *byte
	Len  uint64

	_      [32]byte
}

type Sigset_t struct {
	Val [4]uint32
}

type Reg struct {
	R    [13]uint32
	Sp   uint32
	Lr   uint32
	Pc   uint32
	Cpsr uint32
}

type FpReg struct {
	Fpsr uint32
	Fpr  [8]FpExtendedPrecision
}

type FpExtendedPrecision struct {
	Exponent    uint32
	Mantissa_hi uint32
	Mantissa_lo uint32
}

type PtraceIoDesc struct {

	Trapno uint32
	Fs     uint16
	Gs     uint16
	Err    uint32
	Es     uint16
	Ds     uint16
	Rip    int64
	Cs     int64
	Rflags int64
	Rsp    int64
	Ss     int64
}

type FpReg struct {
	Env   [4]uint64
	Acc   [8][16]uint8
	Xacc  [16][16]uint8
	Spare [12]uint64
}

type FpExtendedPrecision struct{}

type PtraceIoDesc struct {
	Op   int32
	Offs uintptr

	return ptrace(PT_CONTINUE, pid, 1, signal)
}

func PtraceDetach(pid int) (err error) {
	return ptrace(PT_DETACH, pid, 1, 0)
}

func PtraceGetFpRegs(pid int, fpregsout *FpReg) (err error) {
	return ptracePtr(PT_GETFPREGS, pid, unsafe.Pointer(fpregsout), 0)
}

func PtraceGetRegs(pid int, regsout *Reg) (err error) {
	return ptracePtr(PT_GETREGS, pid, unsafe.Pointer(regsout), 0)
}

	s.allocatable &^= 1 << s.SPReg
	s.allocatable &^= 1 << s.SBReg
	if s.f.Config.hasGReg {
		s.allocatable &^= 1 << s.GReg
	}
	if buildcfg.FramePointerEnabled && s.f.Config.FPReg >= 0 {
		s.allocatable &^= 1 << uint(s.f.Config.FPReg)
	}
	if s.f.Config.LinkReg != -1 {
		if isLeaf(f) {
			// Leaf functions don't save/restore the link register.
			s.allocatable &^= 1 << uint(s.f.Config.LinkReg)
		}
	}