MIPS saved register troubles

[Andrew Cagney]

> I spent some time fiddling with backtraces in an o32 application, using a
> mips64-linux GDB, this morning.  They don't work so well :)  The basic
> problem is the [0,NUM_REGS) hack.  mips_register_raw_size reports that
> register $28 is 8 bytes wide, so legacy_saved_regs_prev_register loads two
> consecutive saved values into $28, and it looks like 0x7ffffe007ffffd8c ($s8
> concatenated with $sp).

Can you provide more details?

> Fixing this is going to be ugly.  Andrew, I don't suppose you have a plan to
> migrate MIPS to the new frame code, thereby making all this go away?

I'm not so sure?  BTW, you can't miss my irregular MIPS cleanups.  My 
current problem is:
[regression] Internal error: pc 0x400b21 in read in psymtab, but not in 
symtab.
http://sources.redhat.com/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=1519
look familar?

Andrew