On 30 March 2012 14:22, Steve Comstock <st...@trainersfriend.com> wrote: > On 3/30/2012 12:13 PM, Tony Harminc wrote: [...] >> Is it not generally the case that LE assembler can make itself non-LE >> for purposes of calling something, just by not passing the appropriate >> value in R12?
> Whoa! That's news to me!! > > I don't think so. > > > R12 points to the Common Anchor Area; being LE-conforming > means, among other things, that an ESTAE (and usually an > ESPIE) is established; a heap and a stack have been acquired, > and other infrastructure put into place. Sure. I am not claiming that simply clearing R12 deletes the LE environment - certainly not. But how does a called program determine that its caller does have an LE environment set up? Is it not a requirement that a valid R12 be passed in, and if it is not, what does a called LE (main) program do? > That being said, LE Assembler can call non-LE programs (usually > Assembler themselves) with no problem (well, there are a few > sticky situations), with no need to change R12 contents. Sure - but that's a quite different situation. We are talking about LE assembler calling LE assembler when it may be desirable that the called program not perceive that the caller is LE enabled. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
