On Mon, 14 May 2018 19:21:59 +0000, Seymour J Metz <sme...@gmu.edu> wrote:
>>>In all of this, I don't remember the OP ever mentioning saving and restoring >>>the 64-bit registers. Without doing that the calling conventions are >>>violated, >>>and you are breaking any AMODE(64) caller. >>The intention was for this to be used by a 32-bit >>program, that only executes 32-bit instructions, >>that only ever change 32-bit registers, which >>means that you only need to save and restore >>32-bit registers. >So there was no intention to run under z/OS? I don't understand the comment. z/OS is indeed a target, and if you try running a 32-bit program in AM64 on z/OS you will find that it runs perfectly fine, and you only need to save the 32-bit registers. So long as you only use 32-bit instructions and don't disturb the upper 32 bits of registers. BFN. Paul. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
