@listserv.uga.edu
Subject: Re: OPSYN self execution
The problem is the RELDC OPSYN. You don't have an opcode or an OPSYN for RELDC
so why are you undefining an opcode that is not defined?
I believe you actually want DC OPSYN REALDC which will revert DC back to the
real opcode. I think
John
-Original Message-
From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@listserv.uga.edu] On
Behalf Of John Gilmore
Sent: Saturday, January 19, 2013 8:32 AM
To: ASSEMBLER-LIST@listserv.uga.edu
Subject: Re: OPSYN self execution
Jonathan,
You did miss something. The undefine
.
Regards, Jon Perryman.
From: Bodoh John Robert [Contractor] john.robert.bo...@irs.gov
To: ASSEMBLER-LIST@LISTSERV.UGA.EDU
Sent: Thu, February 7, 2013 2:46:23 PM
Subject: Re: OPSYN self execution
Sorry it has taken so long to get back to this but I haven't had
Ref: Your note of Fri, 18 Jan 2013 14:58:20 -0800
Unless I've missed something, John Ehrman's method doesn't work
for intercepting an instruction, only for a macro, such as the
READ macro shown in the example. For an instruction, you need
to save the built-in definition before you can replace
Jonathan,
You did miss something. The undefine or restore mode of
|new OPSYN
eliminates the effect of the redefinition
|old OPSYN new
John Gilmore, Ashland, MA 01721 - USA
Jan 2013 19:54:13 +
From:Bodoh John Robert john.robert.bo...@irs.gov
Subject: OPSYN Self Execution
All,
I would like to augment the DC assembler instruction in some parts of a pro=
gram. I would like to collect additional information from the DC instructi=
on. I have been playing
Just tried this out. As far as I can tell, OPSYN *completely replaces*
the subject mnemonic opcode. Thus:
DC OPSYN MYDC
ABC DC:ASM F'1'
results in 'Undefined operation code', which seems a bit like an
oversight or lost opportunity.
Brent Longborough
On 19/01/2013 13:46, Brent Longborough
Try a technique like that illustrated in this example:
Macro , Defined in the source program
L READ A,B,C
READ_XX OpSyn READ Save Wrapper's definition as READ_XX
READOpSyn , Nullify this macro's definition
- - -
On 18 January 2013 14:54, Bodoh John Robert john.robert.bo...@irs.gov wrote:
I would like to augment the DC assembler instruction in some parts of a
program. I would like to collect additional information from the DC
instruction. I have been playing with the OPSYN statement to redefine the
Ref: Your note of Fri, 18 Jan 2013 19:54:13 +
If you want to modify DC, you need to define an opcode which
refers to the original DC first so that you can invoke it from
within the macro.
DC_ OPSYN DC Set up alias for original DC
DC OPSYN MYDCRedirect DC to my macro
Jonathan Scott wrote:
If you want to modify DC, you need to define an opcode which
refers to the original DC first so that you can invoke it from
within the macro.
DC_ OPSYN DC Set up alias for original DC
DC OPSYN MYDCRedirect DC to my macro
Then within the macro you
I am out of the office until Monday 1/28/2013. I will read your note, as time
permits, when I return to the office. If your e-mail is urgent and concerns a
production issue/problem, please send your note to the 'GLO-RETS zOS Content'
mailbox for attention.
Thanks!
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