> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Tom Marchant > Sent: Thursday, February 04, 2010 3:43 PM > To: [email protected] > Subject: Re: Word-1 of the Co nventional Save Area > > On Thu, 4 Feb 2010 14:57:05 -0600, Rick Fochtman wrote: > > >Tom Marchant wrote: > > > >>On Thu, 4 Feb 2010 11:54:44 -0600, McKown, John wrote: > >> > >> > >> > >>>Of course, I always zero 8(,13) just before I RETURN (in HLASM). > >>> > >>> > >> > >>Of course? Why? > >> > >> > >> > >So you know where the chain ends in a dump. > > What's wrong with register 13? IAC, forward chain is not reliable. > > -- > Tom Marchant
What if R13 has been destroyed somehow? You can do forward chaining by starting at TCBFSA to the first save area, then using the pointer in word 3 of the save areas to chain forward until it is zero. That is what the SYSUDUMP formatter does. But I do agree that the forward chain is not always reliable. It is for every compiled language that I'm aware of. But it depends on the HLASM programmer following the convention if there is any assembler along the line. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets® 9151 Boulevard 26 • N. Richland Hills • TX 76010 (817) 255-3225 phone • (817)-961-6183 cell [email protected] • www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets® is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. –The Chesapeake Life Insurance Company®, Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
