func (c *sigctxt) r8() uint32  { return c.regs().__gregs[8] }
func (c *sigctxt) r9() uint32  { return c.regs().__gregs[9] }
func (c *sigctxt) r10() uint32 { return c.regs().__gregs[10] }
func (c *sigctxt) fp() uint32  { return c.regs().__gregs[11] }
func (c *sigctxt) ip() uint32  { return c.regs().__gregs[12] }
func (c *sigctxt) sp() uint32  { return c.regs().__gregs[13] }

func (c *sigctxt) r14() uint64 { return c.regs().__gregs[_REG_X14] }
func (c *sigctxt) r15() uint64 { return c.regs().__gregs[_REG_X15] }
func (c *sigctxt) r16() uint64 { return c.regs().__gregs[_REG_X16] }
func (c *sigctxt) r17() uint64 { return c.regs().__gregs[_REG_X17] }
func (c *sigctxt) r18() uint64 { return c.regs().__gregs[_REG_X18] }
func (c *sigctxt) r19() uint64 { return c.regs().__gregs[_REG_X19] }

func (c *sigctxt) eax() uint32 { return c.regs().__gregs[_REG_EAX] }
func (c *sigctxt) ebx() uint32 { return c.regs().__gregs[_REG_EBX] }
func (c *sigctxt) ecx() uint32 { return c.regs().__gregs[_REG_ECX] }
func (c *sigctxt) edx() uint32 { return c.regs().__gregs[_REG_EDX] }
func (c *sigctxt) edi() uint32 { return c.regs().__gregs[_REG_EDI] }
func (c *sigctxt) esi() uint32 { return c.regs().__gregs[_REG_ESI] }

func (c *sigctxt) rsp() uint64 { return c.regs().__gregs[_REG_RSP] }
func (c *sigctxt) r8() uint64  { return c.regs().__gregs[_REG_R8] }
func (c *sigctxt) r9() uint64  { return c.regs().__gregs[_REG_R9] }
func (c *sigctxt) r10() uint64 { return c.regs().__gregs[_REG_R10] }
func (c *sigctxt) r11() uint64 { return c.regs().__gregs[_REG_R11] }
func (c *sigctxt) r12() uint64 { return c.regs().__gregs[_REG_R12] }

func (c *sigctxt) r0() uint32  { return c.regs().__gregs[_REG_R0] }
func (c *sigctxt) r1() uint32  { return c.regs().__gregs[_REG_R1] }
func (c *sigctxt) r2() uint32  { return c.regs().__gregs[_REG_R2] }
func (c *sigctxt) r3() uint32  { return c.regs().__gregs[_REG_R3] }
func (c *sigctxt) r4() uint32  { return c.regs().__gregs[_REG_R4] }
func (c *sigctxt) r5() uint32  { return c.regs().__gregs[_REG_R5] }

	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_EIP] = uint32(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_UESP] = uint32(uintptr(stk))
	mc.__gregs[_REG_EBX] = uint32(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_EDX] = uint32(uintptr(unsafe.Pointer(gp)))
	mc.__gregs[_REG_ESI] = uint32(fn)

	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_RIP] = uint64(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_RSP] = uint64(uintptr(stk))
	mc.__gregs[_REG_R8] = uint64(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_R9] = uint64(uintptr(unsafe.Pointer(gp)))
	mc.__gregs[_REG_R12] = uint64(fn)

	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_R15] = uint32(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_R13] = uint32(uintptr(stk))
	mc.__gregs[_REG_R0] = uint32(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_R1] = uint32(uintptr(unsafe.Pointer(gp)))
	mc.__gregs[_REG_R2] = uint32(fn)
}

func checkgoarm() {
	// TODO(minux): FP checks like in os_linux_arm.go.

	// Machine dependent mcontext initialisation for LWP.
	mc.__gregs[_REG_ELR] = uint64(abi.FuncPCABI0(lwp_tramp))
	mc.__gregs[_REG_X31] = uint64(uintptr(stk))
	mc.__gregs[_REG_X0] = uint64(uintptr(unsafe.Pointer(mp)))
	mc.__gregs[_REG_X1] = uint64(uintptr(unsafe.Pointer(mp.g0)))
	mc.__gregs[_REG_X2] = uint64(fn)
}

//go:nosplit
func cputicks() int64 {

	_       [4]byte // EABI
}

func (tv *timeval) set_usec(x int32) {
	tv.tv_usec = x
}

type itimerval struct {
	it_interval timeval
	it_value    timeval
}

type mcontextt struct {
	__gregs     [17]uint32
	_           [4]byte   // EABI
	__fpu       [272]byte // EABI
	_mc_tlsbase uint32
	_           [4]byte // EABI
}

type ucontextt struct {
	uc_flags    uint32
	uc_link     *ucontextt