Assume that any system macro expanding to a PC or an SVC will clobber R15-R1.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Assembler List [ASSEMBLER-LIST@LISTSERV.UGA.EDU] on behalf of Charles Mills [charl...@mcn.org] Sent: Wednesday, January 26, 2022 4:35 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Debugging Assembler Rexx programs I'm just lazy. Rather than look up SNAP I just used DC H'0'. I seem to recall that SNAP clobbers a couple of registers but I could be wrong on that. Charles -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of Abe Kornelis Sent: Wednesday, January 26, 2022 11:38 AM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: Debugging Assembler Rexx programs Charles, I've used SNAP dumps extensively - but never in a program called from REXX. Is there a reason you left it out of your list of options? I used to like very much the ultra-short snaps with just PSW and register dump. Kind regards, Abe === Op 26/01/2022 om 18:32 schreef Charles Mills: > I have a fair amount of experience writing assembler and calling it from Rexx. > > Is your problem with "getting going" -- the linkage and that sort of thing -- > or some logic problem in your assembler once you get going? > > You might try writing the world's simplest assembler program first -- maybe > just do nothing except survive the call and return successfully. Get that > working. > > Then enhance it to return 'Hello, World!" in the result area. SAY it from > your calling Rexx to make sure you got it right. > > And then move forward one step at a time. > > You have two "non-debugger" options for debugging: > > 1. WTO's. Good especially for tracing how far you got in your logic. > 2. The old DC H'0' and debug from the dump. > > Charles > > > -----Original Message----- > From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] > On Behalf Of Joseph Reichman > Sent: Wednesday, January 26, 2022 8:35 AM > To: ASSEMBLER-LIST@LISTSERV.UGA.EDU > Subject: Re: Debugging Assembler Rexx programs > > The copy book is assembler > It tells me the name of the variable it’s length > And it’s offset which would be it’s value > > I have one Simple question > > This url > > https://secure-web.cisco.com/1UquAMCyEUPJhSwj3D2K6mMWzklK5vQ7W8h1UgBkOBeY8TCNAS1ULsCPrnOPHd84cy5sEo45DOaWrMtGJlZj42JpVZzbdSBRBG27Pjj5IG4ZrGUvxeyy5zQlwywEmMl8N3Pk0l4Gcha_s02hBu-_DnpMoRVEAJSf-gKvQCQfpbPIcRVfonOFkPZ5niLbJ6_4OxRmItVi0amiVv-HYM345rFfVs8m_7HLLVnJASIOPdyVWQzjvqFdZC7YR5e153nF3CtqFJLP_4hWs5hEFCIG9mIri4hJCVB_KcWJXLeP9qV6dGCi0Zca4uzx4Ip_TxxcX1edq7U7qCywzGYOMIKJJVa9CwzXjTttkFSTWP8bzcJkXC5VHW7Nx9Q5-V5GuWP7_0M3DoQO2TtPUFAnD-wU4dE1WtZCQebr_dt335MfatXvDHrow2VUPqFxm_ZiOwSdk/https%3A%2F%2Fshare.confex.com%2Fshare%2F115%2Fwebprogram%2FHandout%2FSession7691%2FS7691bla.pdf > > Contains what I want to do it says how to write > The program if the program is extensive > You have to debug it > > The only way to get the Rexx environment > Block > > Address tso > “Call ‘myloadlib(myprog) passenvb’ > Passenvb populates register 0 with the address of the envblock > > How would I debug this program > > It tried test ‘mylosdlib(myprog)’ cp > And used ECTENVBK but now I am getting > > A return code invalid language environment > > > >> On Jan 26, 2022, at 11:16 AM, Paul Gilmartin >> <00000014e0e4a59b-dmarc-requ...@listserv.uga.edu> wrote: >> >> On Jan 26, 2022, at 08:09:14, Joe Reichman wrote: >>> Thanks but that would never here at the IRS this place is highly sensitive >>> to anything from the outside >>> >> It's hard for these fora to help you if: >> >> o You can't show the failing code. >> >> o You can't accept working examples from outside. >> >> Must your solution involve Assembler? Why not keep the data in a file, >> read it with Rexx and populate the variables with assignment statements >> or VALUE()? >> >> -- >> gil
