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| Subject | Re: Pointless Nostalgia: System Service Dispatching |
| References | (1 earlier) <nl0br9$5q7$1@Iltempo.Update.UU.SE> <11185428-ecac-4acc-814e-b3a1063a4bf4@googlegroups.com> <nl3491$rou$1@Iltempo.Update.UU.SE> <00B0B657.24DF3378@SendSpamHere.ORG> <nl3r1k$f2f$1@Iltempo.Update.UU.SE> |
| From | VAXman- @SendSpamHere.ORG |
| Message-ID | <00B0B66F.E33DC123@SendSpamHere.ORG> (permalink) |
| Organization | c.2016 Brian Schenkenberger. Prior employers of copyright holder and their agents must first obtain written permission to copy this posting. |
| Date | 2016-06-30 19:52 +0000 |
In article <nl3r1k$f2f$1@Iltempo.Update.UU.SE>, Johnny Billquist <bqt@softjar.se> writes:
>On 2016-06-30 18:55, VAXman-@SendSpamHere.ORG wrote:
>> In article <nl3491$rou$1@Iltempo.Update.UU.SE>, Johnny Billquist <bqt@softjar.se> writes:
>>> On 2016-06-30 01:05, lawrencedo99@gmail.com wrote:
>>>> On Wednesday, June 29, 2016 at 11:36:10 PM UTC+12, Johnny Billquist wrote:
>>>>> Consider a $QIOW for example. If you get an AST, you do not want the $QIOW
>>>>> to be reexecuted.
>>>>
>>>> That’s not a problem, because there is no actual $QIOW system call.
>>>
>>> There isn't? Did I place the $ on the wrong side or something now? Or
>>> what are you suggesting?
>>
>> SYS$QIOW => SYS$QIO+SYS$SYNCH
>
>Functionally, yes. But does it actually put two different syscalls in
>your instruction stream, one after the other?
In *your* instruction stream meaning the code YOU'VE written? No. There's
a vector you'd call that maintains the 2 system calls.
>On RSX, QIO$ and QIOW$ are two different DICs, even though QIOW$ really
>is the same as a QIO$ followed by a WTEF$
>
>Looking on a VMS system, it's a bit unclear. The $QIO_S and $QIOW_S
>calls different functions. But what those functions do, in turn, I don't
>know. (SYS$QIO and SYS$QIOW)
.MACRO $QIO_S EFN=#0,CHAN,FUNC,IOSB=0,ASTADR=0,ASTPRM=#0,-
P1=0,P2=#0,P3=#0,P4=#0,P5=#0,P6=#0
.GLOBL SYS$QIO
$PUSHTWO P6,P5
$PUSHTWO P4,P3
PUSHL P2
$PUSHADR P1
$QIOPUSH ASTPRM,ASTADR
$PUSHADR IOSB,CONTEXT=Q
MOVZWL FUNC,-(SP)
MOVZWL CHAN,-(SP)
PUSHL EFN
CALLS #12,G^SYS$QIO
.ENDM $QIO_S
.MACRO $QIOW_S EFN=#0,CHAN,FUNC,IOSB=0,ASTADR=0,ASTPRM=#0,-
P1=0,P2=#0,P3=#0,P4=#0,P5=#0,P6=#0
.GLOBL SYS$QIOW
$PUSHTWO P6,P5
$PUSHTWO P4,P3
PUSHL P2
$PUSHADR P1
$QIOPUSH ASTPRM,ASTADR
$PUSHADR IOSB,CONTEXT=Q
MOVZWL FUNC,-(SP)
MOVZWL CHAN,-(SP)
PUSHL EFN
CALLS #12,G^SYS$QIOW
.ENDM $QIOW_S
But that SYS$QIOW looks something like:
.ENTRY SYS$QIOW,0
$QIOWDEF
$SYNCHDEF
CALLG (AP),G^SYS$QIO
BLBC R0,ERROR
PUSHL QIOW$_IOSB(AP)
PUSHL QIOW$_EFN(AP)
CALLS #SYNCH$_NARGS,G^SYS$SYNCH
ERROR: RET
It's actually a bit more elaborate today due to threads but nothing to write
home about.
--
VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG
I speak to machines with the voice of humanity.
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Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-29 02:53 -0700
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-29 13:36 +0200
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-29 16:05 -0700
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-30 14:45 +0200
Re: Pointless Nostalgia: System Service Dispatching moroney@world.std.spaamtrap.com (Michael Moroney) - 2016-06-30 16:53 +0000
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-06-30 15:32 -0700
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-06-30 16:55 +0000
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-06-30 21:13 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-06-30 19:52 +0000
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 14:11 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-01 12:46 +0000
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 17:40 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-01 16:59 +0000
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-01 19:45 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-01 20:01 +0000
Re: Pointless Nostalgia: System Service Dispatching Johnny Billquist <bqt@softjar.se> - 2016-07-04 12:35 +0200
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-01 15:18 -0700
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-02 20:02 +0000
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-03 14:10 -0700
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-04 14:56 -0700
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-04 13:25 +0000
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-05 00:46 +0000
Re: Pointless Nostalgia: System Service Dispatching David Froble <davef@tsoft-inc.com> - 2016-07-05 08:43 -0400
Re: Pointless Nostalgia: System Service Dispatching lawrencedo99@gmail.com - 2016-07-05 15:40 -0700
Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-06 07:33 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-06 00:08 +0000
Re: Pointless Nostalgia: System Service Dispatching David Froble <davef@tsoft-inc.com> - 2016-07-05 22:57 -0400
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-06 10:43 +0000
Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-05 12:30 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-05 13:00 +0000
Re: Pointless Nostalgia: System Service Dispatching Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-07-06 15:12 +0000
Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-06 21:50 +0200
[OT] Real Genius, was: Re: Pointless Nostalgia: System Service Dispatching Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2016-07-07 19:55 +0000
Re: [OT] Real Genius, was: Re: Pointless Nostalgia: System Service Dispatching Paul Sture <nospam@sture.ch> - 2016-07-07 22:27 +0200
Re: Pointless Nostalgia: System Service Dispatching VAXman- @SendSpamHere.ORG - 2016-07-06 15:42 +0000
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