In a recent note, Charles Mills said: > Date: Fri, 29 Sep 2006 16:18:06 -0700 > > I believe I recall doing that also, although the timeframe would have been > ~1970, back when I found it more amusing than I do today to play "what if?" > in MVS (then OS/360). > Not so much such bravado as naivete. Modifying code generation in a compiler, I needed to become familiar with the documented formats of SYSLIN records. On discovering the entry address in the END record, I assumed with delight that I could save one instruction per load module by omitting the BC 15 and letting ATTACH bypass the eyecatchers.
I had never previously used a system on which executables were re-editable, nor one with CKD DASD, so neither the possibility nor the desirability of relinking to reblock occurred to me. And, regardless, it would not have occurred to me that simple relinking would fail to preserve such an important attribute from the previous link editing. An expert regular contributor to ASSEMBLER-LIST has taken the position that preserving such information is unnecessary and even undesirable -- the programmer should either retain the original link editing commands (SMP/E does so) or rely on AMBLIST to recreate them. IBM development has apparently judged otherwise and lately provided the "-attr" option on the INCLUDE command. I suspect this is to support IEBCOPY's use of Binder to reblock and convert between load modules and program objects. > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf > Of Paul Gilmartin > > > http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/iea2b160/5.1.1 > > * Through an assembler- or compiler-produced END statement > of an input object module if one is present. ... -- gil -- StorageTek INFORMATION made POWERFUL ---------------------------------------------------------------------- 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
