1) I usually don't check and it never ocurred to me to receive a list of parameters not fullword aligned. But it may be a problem if it isn't. 2) I always check. It's the first thing I do. If I don't get the right number of parameters, I interrupt the execution and immediately return an error code.
Yip Cho Paul System Programmer ________________________________________ De: IBM Mainframe Assembler List [[email protected]] em Nome de McKown, John [[email protected]] Enviado: quarta-feira, 11 de agosto de 2010 11:07 Para: [email protected] Assunto: Parameter passing: overly cautious or properly paranoid? This is just curiousity on my part. I was thinking about standard parameter passing in z/OS. That's where R1 points to a list of fullwords containing address of parameters, with the last address having the high order bit set and all previous addresses having the high order bit unset. So I was wondering the following: 1) do you check to make sure that R1 actually points to a fullword boundry. I.e. bits 30&31 are '0'b? Is this necessary or not? If R1 doesn't point to a fullword boundry, is that actually an error? That is, do you feel that a proper parameter list must be fullword aligned? 2) do you always verify bit 0 of every fullword in the list of addresses to make sure that you get the expected number of parameters? What do you do if you get too few or too many? 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 "Esta mensagem e uma correspondencia reservada e sua divulgacao, distribuicao, reproducao ou qualquer forma de utilizacao depende de autorizacao, sujeitando-se o responsavel a medidas judiciais. O remetente utiliza o correio eletronico no exercicio do seu trabalho ou em razao dele, eximindo esta instituicao de qualquer responsabilidade por utilizacao indevida. Se voce a recebeu por engano, favor elimina-la." "This message is a reserved correspondence and its disclosure, distribution, reproduction or any other form of use shall depend upon proper authorization, and the recipient responsible for such disclosure, distribution, reproduction or use shall be subject to legal actions. The sender uses the electronic mail in the exercise of his/her work or by virtue thereof, and the institution accepts no liability for its undue use. If you have received this e-mail by mistake, please delete it."
