//go:noescape
func setitimer(mode int32, new, old *itimerval)

//go:noescape
func sysctl(mib *uint32, miblen uint32, out *byte, size *uintptr, dst *byte, ndst uintptr) int32

func raiseproc(sig uint32)

func thr_self() thread
func thr_kill(tid thread, sig int)

//go:noescape
func sys_umtx_op(addr *uint32, mode int32, val uint32, uaddr1 uintptr, ut *umtx_time) int32

func osyield()

//go:nosplit
func osyield_no_g() {

	MUL	R3, R4
	SUB	R4, R5
	MOVW	$1000, R4
	MUL	R4, R5
	MOVD	R5, 16(RSP)

	// nanosleep(&ts, 0)
	ADD	$8, RSP, R0
	MOVD	$0, R1
	MOVD	$SYS_nanosleep, R8
	SVC
	RET

// func thr_self() thread
TEXT runtime·thr_self(SB),NOSPLIT,$8-8
	MOVD	$ptr-8(SP), R0	// arg 1 &8(SP)
	MOVD	$SYS_thr_self, R8
	SVC
	MOVD	ptr-8(SP), R0
	MOVD	R0, ret+0(FP)
	RET

// func thr_kill(t thread, sig int)

TEXT runtime·write1(SB),NOSPLIT,$-4
	MOVL	$SYS_write, AX
	INT	$0x80
	JAE	2(PC)
	NEGL	AX			// caller expects negative errno
	MOVL	AX, ret+12(FP)
	RET

TEXT runtime·thr_self(SB),NOSPLIT,$8-4
	// thr_self(&0(FP))
	LEAL	ret+0(FP), AX
	MOVL	AX, 4(SP)
	MOVL	$SYS_thr_self, AX
	INT	$0x80
	RET

TEXT runtime·thr_kill(SB),NOSPLIT,$-4
	// thr_kill(tid, sig)
	MOVL	$SYS_thr_kill, AX
	INT	$0x80
	RET

	MUL	A1, A0, A0
	MOV	$1000000000, A1
	DIV	A1, A0, A2
	MOV	A2, 8(X2)
	REM	A1, A0, A3
	MOV	A3, 16(X2)
	ADD	$8, X2, A0
	MOV	ZERO, A1
	MOV	$SYS_nanosleep, T0
	ECALL
	RET

// func thr_self() thread
TEXT runtime·thr_self(SB),NOSPLIT,$8-8
	MOV	$ptr-8(SP), A0	// arg 1 &8(SP)
	MOV	$SYS_thr_self, T0
	ECALL
	MOV	ptr-8(SP), A0
	MOV	A0, ret+0(FP)
	RET

// func thr_kill(t thread, sig int)

TEXT runtime·closefd(SB),NOSPLIT|NOFRAME,$0
	MOVW fd+0(FP), R0	// arg 1 fd
	MOVW $SYS_close, R7
	SWI $0
	MOVW.CS	$-1, R0
	MOVW	R0, ret+4(FP)
	RET

TEXT runtime·thr_self(SB),NOSPLIT,$0-4
	// thr_self(&0(FP))
	MOVW $ret+0(FP), R0 // arg 1
	MOVW $SYS_thr_self, R7
	SWI $0
	RET

TEXT runtime·thr_kill(SB),NOSPLIT,$0-8
	// thr_kill(tid, sig)
	MOVW tid+0(FP), R0	// arg 1 id

	MOVL	n+16(FP), DX		// arg 3 count
	MOVL	$SYS_write, AX
	SYSCALL
	JCC	2(PC)
	NEGQ	AX			// caller expects negative errno
	MOVL	AX, ret+24(FP)
	RET

TEXT runtime·thr_self(SB),NOSPLIT,$0-8
	// thr_self(&0(FP))
	LEAQ	ret+0(FP), DI	// arg 1
	MOVL	$SYS_thr_self, AX
	SYSCALL
	RET

TEXT runtime·thr_kill(SB),NOSPLIT,$0-16
	// thr_kill(tid, sig)
	MOVQ	tid+0(FP), DI	// arg 1 id

	SYS_THR_CREATE               = 430 // { int thr_create(ucontext_t *ctx, long *id, \
	SYS_THR_EXIT                 = 431 // { void thr_exit(long *state); }
	SYS_THR_SELF                 = 432 // { int thr_self(long *id); }
	SYS_THR_KILL                 = 433 // { int thr_kill(long id, int sig); }
	SYS__UMTX_LOCK               = 434 // { int _umtx_lock(struct umtx *umtx); }

	SYS_THR_CREATE               = 430 // { int thr_create(ucontext_t *ctx, long *id, \
	SYS_THR_EXIT                 = 431 // { void thr_exit(long *state); }
	SYS_THR_SELF                 = 432 // { int thr_self(long *id); }
	SYS_THR_KILL                 = 433 // { int thr_kill(long id, int sig); }
	SYS__UMTX_LOCK               = 434 // { int _umtx_lock(struct umtx *umtx); }

	SYS_THR_CREATE               = 430 // { int thr_create(ucontext_t *ctx, long *id, \
	SYS_THR_EXIT                 = 431 // { void thr_exit(long *state); }
	SYS_THR_SELF                 = 432 // { int thr_self(long *id); }
	SYS_THR_KILL                 = 433 // { int thr_kill(long id, int sig); }
	SYS__UMTX_LOCK               = 434 // { int _umtx_lock(struct umtx *umtx); }

	SYS_THR_CREATE               = 430 // { int thr_create(ucontext_t *ctx, long *id, int flags); }
	SYS_THR_EXIT                 = 431 // { void thr_exit(long *state); }
	SYS_THR_SELF                 = 432 // { int thr_self(long *id); }
	SYS_THR_KILL                 = 433 // { int thr_kill(long id, int sig); }
	SYS_JAIL_ATTACH              = 436 // { int jail_attach(int jid); }