Re: [offbyone RFC] Merge i386newframe

[Michal Ludvig <mludvig@suse.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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