Re: [patch/rfc] New program_changed event, cleanup some HPUXHPPAmess

[Andrew Cagney <cagney at gnu dot org>]

> +static void
> +hppa_hpux_observer_inferior_created (struct target_ops *objfile, int from_tty)
> +{
> +  struct gdbarch_tdep *tdep;
> +  struct minimal_symbol *minsym;
> +
> +  tdep = gdbarch_tdep (current_gdbarch);
> +
> +  /* Some HP-UX related globals to clear when a new "main"
> +     symbol file is loaded. HP-specific.  */
> +
> +  /* Indicates HP-compiled code.  */
> +  deprecated_hp_som_som_object_present = 0;
> +  /* Must reinitialize exception stuff.  */
> +  hp_cxx_exception_support_initialized = 0;
> +
> +  minsym = lookup_minimal_symbol ("$$dyncall_external", NULL, NULL);
> +  if (minsym)
> +    tdep->dyncall_external = SYMBOL_VALUE_ADDRESS (minsym);
> +  else
> +    tdep->dyncall_external = -1;
> +
> +  minsym = lookup_minimal_symbol ("_sr4export", NULL, NULL);
> +  if (minsym)
> +    tdep->sr4export = SYMBOL_VALUE_ADDRESS (minsym);
> +  else
> +    tdep->sr4export = -1;
> +}

Unfortunatly, not really but as you've noticed, it does ``work'', sigh. 
 At least we can now see what the code is doing.

The above values are dependant on the inferior (and make change between 
inferior invocations) and not the architecture so their lifetime should 
be bound to the inferior.  This patch binds them to the current 
``global'' architecture :-(

Can, for the immediate term, hppa_hpux_skip_trampoline_code be 
simplified so that it doesn't even try to cache these values?  This will 
put a real strain on the symtab but I think its the symtab that is the 
place that needs the fix.

Andrew