> -----Original Message----- > From: IBM Mainframe Assembler List > [mailto:[email protected]] On Behalf Of Steve Marak > Sent: Thursday, August 12, 2010 4:04 PM > To: [email protected] > Subject: Re: Parameter passing: overly cautious or properly paranoid? > > I like John's question at least as much for what our answers say about > us as for the technical content ... > > Anyway. > > 1) No, but I use ICM to retrieve the values, a habit from the > days when > alignment mattered more. I suppose that implies I don't think > not being > on a fullword boundary is an error, though I always fullword align > parameter lists I'm passing to other code. > > 2) Since I follow each ICM with branches to detect a zero parameter > address (which may or not be valid, depending on what I'm doing) or > end-of-list, I suppose I do. If the situation calls for a specific > number of parameters and I get a different number, that's an immediate > exit with indicative return code. > > Depending on the situation, of course, there may be more paranoia, but > rarely less, even when I wrote both the calling and called > routines. (I > know I can't trust me, because that's what they want me to think.) > > Steve
I used to do a ICM and branch on zero also. I now use the LT and branch on zero. LT is like LTR, but is from storage. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-691-6183 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(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM
