Re: [offbyone RFC] Merge i386newframe

[Michal Ludvig <mludvig at suse dot cz>]

Andrew Cagney wrote:
> > Hi Andrew,
> > this patch is a merge of Mark's i386newframe-branch to your 
> > offbyone-branch. It works quite well, unwinds through signal frames 
> > and frameless functions, but still has some strange regressions that 
> > aren't present in i386newframe branch.
> >
> > For example this program:
> > int var;
> > void foo ()
> > {
> >   var = 0x1234;
> > }
> > int main ()
> > {
> >   foo ();
> >   return 0;
> > }
> >
> > Running it in the GDB:
> > (gdb) b main
> > Breakpoint 1 at 0x804832c: file tst.c, line 8.
> > (gdb) r
> > Starting program: tst
> >
> > Breakpoint 1, main () at tst.c:8
> > 8         foo ();
> > (gdb) n
>
>
> I suspect Daniel's answered this.  The frame ID needs to be constant 
> through out the lifetime of the frame.  Getting that right isn't 
> trivial.  However, getting it right can receive a bonus: d10v now 
> passing mips_pro.exp.

You mean the whole ID should be constant or just id.base? If id.pc must 
be constant as well, it couldn't represent the PC register anymore...
I'm confused.

Michal Ludvig
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