IBM S/390 prologue analysis revisited

[Andrew Cagney]

> I'd like to revisit the question of how to proceed with the s390 frame
> unwinding / prologue analysis code.  I'd like to commit my prologue
> analysis changes, but the IBM GDB folks have expressed a general
> interest in keeping the prologue analysis logic minimal and using
> Dwarf CFI everywhere.  So I'd like to outline my reasons, and see what
> the community thinks is the best approach to take.

You mean: [just for the record]: new prologue analyzer for S/390
http://sources.redhat.com/ml/gdb-patches/2003-04/msg00352.html

I thought the conclusion was that it could/should go in anyway.

As for IBM and the s390.

http://www10.software.ibm.com/developerworks/opensource/linux390/current2_4_19-may2002.shtml#debug20030416
> Note: This patch changes gdb common code in a manner that might cause problems for other platforms. Use the debugger sources created by appyling this patch only to build a debugger for the s390 or s390x architectures.

Yes, someone needs to get CFI working, but that isn't the way to do it :-(

Andrew