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Appendix: Kernel Call Arguments and Return Values

The following table lists the wide- and fast-emitting mode kernel call arguments and return values for each kernel call.

Note: Many functions listed below are internal function calls that you won't find documented in the Library Reference. They're included in this table because you may see them listed in your trace output. Some of the internal functions include:

  • All functions that begin with _
  • InterruptDetachFunc()
  • SignalFault().

All functions with a _r (restartable) use the same call arguments and return values as the equivalent function without the _r.

The rmsg tag indicates the contents of the message. When several are specified, the contents of rmsg are bytes 0-3 in the first, 4-7 in the second, and so on.

Function Wide-emitting
call arguments 		Fast-emitting
call arguments 		Wide-emitting
return values 		Fast-emitting
return values
_bad() A1: empty,
A2: empty 		A1: empty,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ChannelCreate() A1: flags,
A2: empty 		A1: flags,
A2: empty 		R1: chid,
R2: empty 		R1: chid,
R2: empty
ChannelDestroy() A1: chid,
A2: empty 		A1: chid,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ClockAdjust() A1: id,
A2: new->tick_count,
A3: new->tick_nsec_inc 		A1: id,
A2: new->tick_count 		R1: ret_val,
R2: old->tick_count,
R3: old->tick_nsec_inc 		R1: ret_val,
R2: old->tick_count
ClockId() A1: pid,
A2: tid 		A1: pid,
A2: tid 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ClockPeriod() A1: id,
A2: new->nsec,
A3: new->fract 		A1: id,
A2: new->nsec 		R1: ret_val,
R2: old->nsec,
R3: old->fract 		R1: ret_val,
R2: old
ClockTime() A1: id,
A2: new(sec),
A3: new(nsec) 		A1: id,
A2: new(sec) 		R1: ret_val,
R2: old(sec),
R3: old(nsec) 		R1: ret_val,
R2: old
ConnectAttach() A1: nd,
A2: pid,
A3: chid,
A4: index,
A5: flags 		A1: nd,
A2: pid 		R1: coid,
R2: empty 		R1: coid,
R2: empty
ConnectClientInfo() A1: scoid,
A2: ngroups 		A1: scoid,
A2: ngroups 		R1: ret_val,
R2: info->nd,
R3: info->pid,
R4: info->sid,
R5: flags,
R6: info->ruid,
R7: info->euid,
R8: info->suid,
R9: info->rgid,
R10: info->egid,
R11: info->sgid,
R12: info->ngroups,
R13: info->grouplist[0],
R14: info->grouplist[1],
R15: info->grouplist[2],
R16: info->grouplist[3],
R17: info->grouplist[4],
R18: info->grouplist[5],
R19: info->grouplist[6],
R20: info->grouplist[7] 		R1: ret_val,
R2: info->nd
ConnectDetach() A1: coid,
A2: empty 		A1: coid,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ConnectFlags() A1: pid,
A2: coid,
A3: masks,
A4: bits 		A1: coid,
A2: bits 		R1: old_flags,
R2: empty 		R1: old_flags,
R2: empty
ConnectServerInfo() A1: pid,
A2: coid 		A1: pid,
A2: coid 		R1: coid,
R2: info->nd,
R3: info->srcnd,
R4: info->pid,
R5: info->tid,
R6: info->chid,
R7: info->scoid,
R8: info->coid,
R9: info->msglen,
R10: info->srcmsglen,
R11: info->dstmsglen,
R12: info->priority,
R13: info->flags,
R14: info->reserved 		R1: coid,
R2: info->nd
InterruptAttach() A1: intr,
A2: handler_p,
A3: area_p,
A4: areasize,
A5: flags 		A1: intr,
A2: flags 		R1: int_fun_id,
R2: empty 		R1: int_fun_id,
R2: empty
InterruptDetachFunc() A1: intr,
A2: handler_p 		A1: intr,
A2: handler_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
InterruptMask() A1: intr,
A2: id 		A1: intr,
A2: id 		R1: mask_level,
R2: empty 		R1: mask_level,
R2: empty
InterruptUnmask() A1: intr,
A2: id 		A1: intr,
A2: id 		R1: mask_level,
R2: empty 		R1: mask_level,
R2: empty
InterruptWait() A1: flags,
A2: timeout_tv_sec,
A3: timeout_tv_nsec 		A1: flags,
A2: empty 		R1: ret_val,
R2: timeout_p 		R1: ret_val,
R2: empty
MsgDeliverEvent() A1: rcvid,
A2: event->sigev_notify,
A3: event->sigev_notify_function_p,
A4: event->sigev_value,
A5: event->sigev_notify_attributes_p 		A1: rcvid,
A2: event->sigev_notify 		R1: ret_val,
R2: event_p 		R1: ret_val,
R2: empty
MsgError() A1: rcvid,
A2: err 		A1: rcvid,
A2: err 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
MsgInfo() A1: rcvid,
A2: info_p 		A1: rcvid,
A2: info_p 		R1: ret_val,
R2: info->nd,
R3: info->srcnd,
R4: info->pid,
R5: info->tid,
R6: info->chid,
R7: info->scoid,
R8: info->coid,
R9: info->msglen,
R10: info->srcmsglen,
R11: info->dstmsglen,
R12: info->priority,
R13: info->flags,
R14: empty 		R1: ret_val,
R2: info->nd
MsgKeyData() A1: rcvid,
A2: op 		A1: rcvid,
A2: op 		R1: ret_val,
R2: newkey 		R1: ret_val,
R2: newkey
MsgReadv() A1: rcvid,
A2: rmsg_p,
A3: rparts,
A4: offset 		A1: rcvid,
A2: offset 		R1: rbytes,
R2: rmsg,
R3: rmsg,
R4: rmsg 		R1: rbytes,
R2: rmsg
MsgReceivePulse() A1: chid,
A2: rparts 		A1: chid,
A2: rparts 		R1: ret_val,
R2: rmsg, R3:rmsg, R4:rmsg 		R1: ret_val,
R2: empty
MsgReceivev() A1: chid,
A2: rparts 		A1: chid,
A2: rparts 		R1: rcvid,
R2: rmsg,
R3: rmsg,
R4: rmsg,
R5: info->nd,
R6: info->srcnd,
R7: info->pid,
R8: info->tid,
R9: info->chid,
R10: info->scoid,
R11: info->coid,
R12: info->msglen,
R13: info->srcmsglen,
R14: info->dstmsglen,
R15: info->priority,
R16: info->flags,
R17: empty,
R18:empty 		R1: rcvid,
R2: rmsg
MsgReplyv() A1: rcvid,
A2: sparts,
A3: status,
A4: smsg,
A5: smsg,
A6: smsg 		A1: rcvid,
A2: status 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
MsgSendPulse() A1: coid,
A2: priority,
A3: code,
A4: value 		A1: coid,
A2: code 		R1: status,
R2: empty 		R1: status,
R2: empty
MsgSendv() A1: coid,
A2: rcvid,
A3: pid,
A4: msg,
A5: msg,
A6: msg
A7: sparts
A8: rparts 		A1: coid,
A2: rcvid,
A3: pid,
A4: msg 		R1: status,
R2: rmsg,
R3: rmsg,
R4: rmsg 		R1: status,
R2:rmsg

(pid returns 0 for
network
processes)
MsgSendvnc() A1: coid,
A2: rcvid,
A3: pid,
A4: msg,
A5: msg,
A6: msg
A7: sparts
A8: rparts 		A1: coid,
A2: rcvid,
A3: pid,
A4: msg 		R1: status,
R2: rmsg,
R3: rmsg,
R4: rmsg 		R1: status,
R2:rmsg

(pid returns 0 for
network
processes)
MsgVerifyEvent() A1: rcvid,
A2: event->sigev_notify,
A3: event->sigev_notify_function_p,
A4: event->sigev_value,
A5: event->sigev_notify_attributes_p 		A1: rcvid,
A2: event->sigev_notify 		R1: status,
R2: empty 		R1: status,
R2: empty
MsgWritev() A1: rcvid,
A2: sparts,
A3: offset,
A4: msg,
A5: msg,
A6: msg 		A1: rcvid,
A2: offset 		R1: wbytes,
R2: empty 		R1: wbytes,
R2: empty
Function Wide-emitting
call arguments 		Fast-emitting
call arguments 		Wide-emitting
return values 		Fast-emitting
return values
NetCred() A1: coid,
A2: info_p 		A1: coid,
A2: info_p 		R1: ret_val,
R2: info->nd,
R3: info->pid,
R4: info->sid,
R5: info->flags,
R6: info->ruid,
R7: info->euid,
R8: info->suid,
R9: info->rgid,
R10: info->egid,
R11: info->sgid,
R12: info->ngroups,
R13: info->grouplist[0],
R14: info->grouplist[1],
R15: info->grouplist[2],
R16: info->grouplist[3],
R17: info->grouplist[4],
R18: info->grouplist[5],
R19: info->grouplist[6],
R20: info->grouplist[7] 		R1: ret_val,
R2: info->nd
NetInfoscoid() A1: scoid,
A2: empty 		A1: scoid,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
NetSignalKill() A1: cred->ruid,
A2: cred->euid,
A3: nd,
A4: pid,
A5: tid,
A6: signo,
A7: code,
A8: value 		A1: pid,
A2: signo 		R1: empty,
R2: empty 		R1: status,
R2: empty
NetUnblock() A1: vtid,
A2: empty 		A1: vtid,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
NetVtid() A1: vtid,
A2: info_p,
A3: tid,
A4: coid,
A5: priority,
A6: srcmsglen,
A7: keydata,
A8: srcnd,
A9: dstmsglen,
A10: zero 		A1: vtid,
A2: info_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
_nop() A1: dummy,
A2: empty 		A1: dummy,
A2: empty 		R1: empty,
R2: empty 		R1: empty,
R2: empty
_Ring0() A1: func_p,
A2: arg_p 		A1: func_p,
A2: arg_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SchedGet() A1: pid,
A2: tid 		A1: pid,
A2: tid 		R1: ret_val,
R2: sched_priority,
R3: sched_curpriority,
R4: param.__ss_low_priority,
R5: param.__ss_max_repl,
R6: param.__ss_repl_period.tv_sec,
R7: param.__ss_repl_period.tv_nsec,
R8: param.__ss_init_budget.tv_sec,
R9: param.__ss_init_budget.tv_nsec,
R10: param.empty,
R11: param.empty 		R1: ret_val,
R2: sched_priority
SchedInfo() A1: pid,
A2: policy 		A1: pid,
A2: policy 		R1: ret_val,
R2: priority_min,
R3: priority_max,
R4: interval_sec,
R5: interval_nsec,
R6: priority_priv,
 R1: ret_val,
R2: priority_max
SchedSet() A1: pid,
A2: tid,
A3: policy,
A4: sched_priority,
A5: sched_curpriority,
A6: param.__ss_low_priority,
A7: param.__ss_max_repl,
A8: param.__ss_repl_period.tv_sec,
A9: param.__ss_repl_period.tv_nsec,
A10: param.__ss_init_budget.tv_sec,
A11: param.__ss_init_budget.tv_nsec,
A12: param.empty,
A13: param.empty 		A1: pid,
A2: priority 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SchedYield() A1: empty,
A2: empty 		A1: empty,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SignalAction() A1: pid,
A2: sigstub_p,
A3: signo,
A4: act->sa_handler_p,
A5: act->sa_flags,
A6: act->sa_mask.bits[0],
A7: act->sa_mask.bits[1] 		A1: signo,
A2: act->sa_handler_p 		R1: ret_val,
R2: oact->sa_handler_p,
R3: oact->sa_flags,
R4: oact->sa_mask.bits[0],
R5: oact->sa_mask.bits[1] 		R1: ret_val,
R2: oact->sa_handler_p
SignalFault() A1: sigcode,
A2: addr 		A1: sigcode,
A2: addr 		R1: ret_val,
R2: reg_1,
R3: reg_2,
R4: reg_3,
R5: reg_4,
R6: reg_5 		R1: ret_val,
R2: reg_1
SignalKill() A1: nd,
A2: pid,
A3: tid,
A4: signo,
A5: code,
A6: value 		A1: pid,
A2: signo 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SignalProcmask() A1: pid,
A2: tid,
A3: how,
A4: sig_blocked->bits[0],
A5: sig_blocked->bits[1] 		A1: pid,
A2: tid 		R1: ret_val,
R2: old_sig_blocked->bits[0],
R3: old_sig_blocked->bits[1] 		R1: ret_val,
R2: old_sig_blocked->bits[0]
SignalReturn() A1: s_p,
A2: empty 		A1: s_p,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SignalSuspend() A1: sig_blocked->bits[0],
A2: sig_blocked->bits[1] 		A1: sig_blocked->bits[0],
A2: sig_blocked->bits[1] 		R1: ret_val,
R2: sig_blocked_p 		R1: ret_val,
R2: sig_blocked_p
SignalWaitinfo() A1: sig_wait->bits[0],
A2: sig_wait->bits[1] 		A1: sig_wait->bits[0],
A2: sig_wait->bits[1] 		R1: sig_num,
R2: si_signo,
R3: si_code,
R4: si_errno,
R5: p[0],
R6: p[1],
R7: p[2],
R8: p[3],
R9: p[4],
R10: p[5],
R11: p[6] 		R1: sig_num,
R2: si_code
SyncCondvarSignal() A1: sync_p,
A2: all,
A3: sync->count,
A4: sync->owner 		A1: sync_p,
A2: all 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncCondvarWait() A1: sync_p,
A2: mutex_p,
A3: sync->count,
A4: sync->owner,
A5: mutex->count,
A6: mutex->owner 		A1: sync_p,
A2: mutex_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncCtl() A1: cmd,
A2: sync_p,
A3: data_p,
A4: count,
A5: owner 		A1: cmd,
A2: sync_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncDestroy() A1: sync_p,
A2: count,
A3: owner 		A1: sync_p,
A2: owner 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncMutexLock() A1: sync_p,
A2: count,
A3: owner 		A1: sync_p,
A2: owner 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncMutexRevive() A1: sync_p,
A2: count,
A3: owner 		A1: sync_p,
A2: owner 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncMutexUnlock() A1: sync_p,
A2: count,
A3: owner 		A1: sync_p,
A2: owner 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncSemPost() A1: sync_p,
A2: count,
A3: owner 		A1: sync_p,
A2: count 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncSemWait() A1: sync_p,
A2: try,
A3: count,
A4: owner 		A1: sync_p,
A2: count 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SyncTypeCreate() A1: type,
A2: sync_p,
A3: count,
A4: owner,
A5: protocol,
A6: flags,
A7: prioceiling,
A8: clockid 		A1: type,
A2: sync_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SysCpupageGet() A1: index,
A2: empty 		A1: index,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
SysCpupageSet() A1: index,
A2: value 		A1: index,
A2: value 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadDestroyAll() A1: empty,
A2: empty 		A1: empty,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadCancel() A1: tid,
A2: canstub_p 		A1: tid,
A2: canstub_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadCreate() A1: pid,
A2: func_p,
A3: arg_p,
A4: flags,
A5: stacksize,
A6: stackaddr_p,
A7: exitfunc_p,
A8: policy,
A9: sched_priority,
A10: sched_curpriority,
A11: param.__ss_low_priority,
A12: param.__ss_max_repl,
A13: param.__ss_repl_period.tv_sec,
A14: param.__ss_repl_period.tv_nsec,
A15: param.__ss_init_budget.tv_sec,
A16: param.__ss_init_budget.tv_nsec,
A17: param.empty,
A18: param.empty,
A19: guardsize,
A20: empty,
A21: empty,
A22: empty 		A1: func_p,
A2: arg_p 		R1: thread_id,
R2: owner 		R1: thread_id,
R2: owner
ThreadCtl() A1: cmd,
A2: data_p 		A1: cmd,
A2: data_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadDestroy() A1: tid,
A2: priority,
A3: status_p 		A1: tid,
A2: status_p 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadDetach() A1: tid,
A2: empty 		A1: tid,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
ThreadJoin() A1: tid,
A2: status_pp 		A1: tid,
A2: status_pp 		R1: ret_val,
R2: status_p 		R1: ret_val,
R2: status_p
TimerAlarm() A1: id,
A2: itime->nsec(sec),
A3: itime->nsec(nsec),
A4: itime->interval_nsec(sec),
A5: itime->interval_nsec(nsec) 		A1: id,
A2: itime->nsec(sec) 		R1: ret_val,
R2: oitime->nsec(sec),
R3: oitime->nsec(nsec),
R4: oitime->interval_nsec(sec),
R5: oitime->interval_nsec(nsec) 		R1: ret_val,
R2: oitime->nsec(sec)
TimerCreate() A1: id,
A2: event->sigev_notify,
A3: event->sigev_notify_function_p,
A4: event->sigev_value,
A5: event->sigev_notify_attributes_p 		A1: id,
A2: event->sigev_notify 		R1: timer_id,
R2: empty 		R1: timer_id,
R2: empty
TimerDestroy() A1: id,
A2: empty 		A1: id,
A2: empty 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
TimerInfo() A1: pid,
A2: id,
A3: flags,
A4: info_p 		A1: pid,
A2: id 		R1: prev_id,
R2: info->itime.nsec(sec),
R3: info->itime.nsec(nsec),
R4: info->itime.interval_nsec(sec),
R5: info->itime.interval_nsec(nsec),
R6: info->otime.nsec(sec),
R7: info->otime.nsec(nsec),
R8: info->otime.interval_nsec(sec),
R9: info->otime.interval_nsec(nsec),
R10: info->flags,
R11: info->tid,
R12: info->notify,
R13: info->clockid,
R14: info->overruns,
R15: info->event.sigev_notify,
R16: info->event.sigev_notify_function_p,
R17: info->event.sigev_value,
R18: info->event.sigev_notify_attributes_p 		R1: prev_id,
R2: info->itime.nsec(sec)
TimerSettime() A1: id,
A2: flags,
A3: itime->nsec(sec),
A4: itime->nsec(nsec),
A5: itime->interval_nsec(sec),
A6: itime->interval_nsec(nsec) 		A1: id,
A2: itime->nsec(sec) 		R1: ret_val,
R2: oitime->nsec(sec),
R3: oitime->nsec(nsec),
R4: oitime->interval_nsec(sec),
R5: oitime->interval_nsec(nsec) 		R1: ret_val,
R2: oitime->nsec(sec)
TimerTimeout() A1: id,
A2: timeout_flags,
A3: ntime(sec),
A4: ntime(nsec),
A5: event->sigev_notify,
A6: event->sigev_notify_function_p,
A7: event->sigev_value,
A8: event->sigev_notify_attributes_p 		A1: timeout_flags,
A2: ntime(sec) 		R1: prev_timeout_flags,
R2: otime(sec),
R3: otime(nsec) 		R1: prev_timeout_flags,
R2: otime(sec)
TraceEvent() A1: mode,
A2: class[header],
A3: event[time_off],
A4: data_1,
A5: data_2 		A1: mode,
A2: class 		R1: ret_val,
R2: empty 		R1: ret_val,
R2: empty
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