[PATCH/RFC] Per-architecture DWARF CFI register state initialization hooks

[Andrew Cagney]

>> Sorry, my analysis wasn't completely correct.  What actually happens
>> is an init-order problem during the initialization of the gdbarch
>> in initialize_current_architecture.  The problem is that I call
>> dwarf2_frame_set_init_reg from within the s390_gdbarch_init routine
>> (which I gather is the right place?), and at this point in time,
>> the gdbarch_data call in dwarf2_frame_set_init_reg returns NULL
>> because the gdbarch hasn't finished initialization yet:

I've committed the attatched.  It follows the convention described in 
that revised doco patch I posted:
http://sources.redhat.com/ml/gdb-patches/2004-02/msg00381.html

Andrew

>> gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
>> {
>>   gdb_assert (data->index < gdbarch->nr_data);
>>   /* The data-pointer isn't initialized, call init() to get a value but
>>      only if the architecture initializaiton has completed.  Otherwise
>>      punt - hope that the caller knows what they are doing.  */
>>   if (gdbarch->data[data->index] == NULL
>>       && gdbarch->initialized_p)
> 
> 
> Oopsie.  Yes, now I can see what's going on - I'm not sure what should
> change here.  Andrew, do you recall if the initialized_p check was for
> any specific problem, or might we be able to remove it?
> 
> -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer