TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
	MOV	$SYS_getpid, T0
	ECALL
	// arg 1 pid - already in A0
	MOVW	sig+0(FP), A1	// arg 2
	MOV	$SYS_kill, T0
	ECALL
	RET

// func setitimer(mode int32, new, old *itimerval)
TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
	MOVW	mode+0(FP), A0
	MOV	new+8(FP), A1
	MOV	old+16(FP), A2
	MOV	$SYS_setitimer, T0
	ECALL
	RET

	SVC
	RET

// func raiseproc(sig uint32)
TEXT runtime·raiseproc(SB),NOSPLIT|NOFRAME,$0
	MOVD	$SYS_getpid, R8
	SVC
	MOVW	sig+0(FP), R1
	MOVD	$SYS_kill, R8
	SVC
	RET

// func setitimer(mode int32, new, old *itimerval)
TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
	MOVW	mode+0(FP), R0
	MOVD	new+8(FP), R1
	MOVD	old+16(FP), R2
	MOVD	$SYS_setitimer, R8
	SVC
	RET

			setsig(_SIGPROF, abi.FuncPCABIInternal(sighandler))
		}

		var it itimerval
		it.it_interval.tv_sec = 0
		it.it_interval.set_usec(1000000 / hz)
		it.it_value = it.it_interval
		setitimer(_ITIMER_PROF, &it, nil)
	} else {
		setitimer(_ITIMER_PROF, &itimerval{}, nil)

		// If the Go signal handler should be disabled by default,
		// switch back to the signal handler that was installed

	SYS_SETPGID                  = 82  // { int setpgid(int pid, int pgid); }
	SYS_SETITIMER                = 83  // { int setitimer(u_int which, struct \
	SYS_SWAPON                   = 85  // { int swapon(char *name); }
	SYS_GETITIMER                = 86  // { int getitimer(u_int which, \
	SYS_GETDTABLESIZE            = 89  // { int getdtablesize(void); }
	SYS_DUP2                     = 90  // { int dup2(u_int from, u_int to); }

	SYS_SETPGID                  = 82  // { int setpgid(int pid, int pgid); }
	SYS_SETITIMER                = 83  // { int setitimer(u_int which, struct \
	SYS_SWAPON                   = 85  // { int swapon(char *name); }
	SYS_GETITIMER                = 86  // { int getitimer(u_int which, \
	SYS_GETDTABLESIZE            = 89  // { int getdtablesize(void); }
	SYS_DUP2                     = 90  // { int dup2(u_int from, u_int to); }

	RET

// func tgkill(tgid, tid, sig int)
TEXT ·tgkill(SB),NOSPLIT|NOFRAME,$0-24
	MOV	tgid+0(FP), A0
	MOV	tid+8(FP), A1
	MOV	sig+16(FP), A2
	MOV	$SYS_tgkill, A7
	ECALL
	RET

// func setitimer(mode int32, new, old *itimerval)
TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
	MOVW	mode+0(FP), A0
	MOV	new+8(FP), A1
	MOV	old+16(FP), A2
	MOV	$SYS_setitimer, A7
	ECALL
	RET

	SYS_GETPGRP       = 81  // { int getpgrp(void); }
	SYS_SETPGID       = 82  // { int setpgid(int pid, int pgid); }
	SYS_SETITIMER     = 83  // { int setitimer(u_int which, struct itimerval *itv, \
	SYS_SWAPON        = 85  // { int swapon(char *name); }
	SYS_GETITIMER     = 86  // { int getitimer(u_int which, struct itimerval *itv); }
	SYS_GETDTABLESIZE = 89  // { int getdtablesize(void); }
	SYS_DUP2          = 90  // { int dup2(u_int from, u_int to); }

	SYS_SETPGID                  = 82  // { int setpgid(int pid, int pgid); }
	SYS_SETITIMER                = 83  // { int setitimer(u_int which, struct \
	SYS_SWAPON                   = 85  // { int swapon(char *name); }
	SYS_GETITIMER                = 86  // { int getitimer(u_int which, \
	SYS_GETDTABLESIZE            = 89  // { int getdtablesize(void); }
	SYS_DUP2                     = 90  // { int dup2(u_int from, u_int to); }

	RET

// func tgkill(tgid, tid, sig int)
TEXT ·tgkill(SB),NOSPLIT|NOFRAME,$0-24
	MOVV	tgid+0(FP), R4
	MOVV	tid+8(FP), R5
	MOVV	sig+16(FP), R6
	MOVV	$SYS_tgkill, R11
	SYSCALL
	RET

// func setitimer(mode int32, new, old *itimerval)
TEXT runtime·setitimer(SB),NOSPLIT|NOFRAME,$0-24
	MOVW	mode+0(FP), R4
	MOVV	new+8(FP), R5
	MOVV	old+16(FP), R6
	MOVV	$SYS_setitimer, R11
	SYSCALL
	RET

	SYS_LUTIMES              = 424 // { int|sys|50|lutimes(const char *path, const struct timeval *tptr); }
	SYS_SETITIMER            = 425 // { int|sys|50|setitimer(int which, const struct itimerval *itv, struct itimerval *oitv); }
	SYS_GETITIMER            = 426 // { int|sys|50|getitimer(int which, struct itimerval *itv); }
	SYS_CLOCK_GETTIME        = 427 // { int|sys|50|clock_gettime(clockid_t clock_id, struct timespec *tp); }