IMO, If you are going down the path of writing C/C++ for z/OS of much significance, you will likely need to write some assembler routines that you can call from C/C++. Just bite the bullet and figure out the calling conventions (XPLINK?) and you will be glad in the long run.
The compiler inlining support is another option that often good, but in many cases it can be tricky because you have to carefully declare all of the register clobbers, not to mention the crazy syntax and symantics of __asm. Kirk Wolf Dovetailed Technologies, LLC http://coztoolkit.com Dovetailed Technologies: +1 636.300.0901 Note: Our website and domain name have changed from dovetail.com to coztoolkit.com On Mon, Aug 15, 2022, at 1:17 PM, Tony Harminc wrote: > Marginally related to my previous question - I'd like to do a TESTAUTH from > C/C++ code, and refuse to run if I'm not APF authorized. I'm not proposing > to actual use the result for any sort of my own security testing, but just > to know if calling a C/C++ library function that is documented to require > APF (or better) is likely to fail so I can tell the user early. > > I don't see a C library function to do this. The TESTAUTH expansion is > tiny, and I could use __ASM(...), but it's perhaps neater to just test > JSCBAUTH directly in C code. Yes, I realize TESTAUTH is more than just > testing that one bit, but I think it's true that if that bit is off (and > I'm not in supervisor state or system key, which I won't be), then a > TESTAUTH would fail, and that's all I want to know. > > Oddly enough, there *is* a library function that appears to test for the > Program Controlled state. Well, maybe not - it's __must_stay_clean() which > tests for the "must not lose Program Controlled" status, so not quite the > same. > > What's the best approach? > > Tony H. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
