[RFA] sighandler backtrace on x86-64

[Michal Ludvig]

Elena Zannoni wrote:
> Do you need to make the whole structure accessible? would it be enough
> for your purposes to just add
> struct context;
> struct context_reg;
> to the .h file?

Hmm, I don't think so. I'm afraid I'll have to artifically create the 
content of context_reg for the sighandler caller frame.

 > I don't see any uses of the structures and functions you are
 > exporting.
 > Could you postpone these changes until they are actually used?

Sure I can. Anyway having all structures in .h isn't a bad habit, is it?

>  > +struct context *context_alloc ();
>  > +void context_cpy (struct context *dst, struct context *src);
>  > +struct frame_state *frame_state_alloc ();
> 
> 'extern' keyword?

It is the default for function declarations, and AFAIK is never used for 
them in gdb's headers.

Can I commit without the struct context movement?

Michal Ludvig
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