Re: [2/10] Remove &builtin_type_ from tdep code (amd64/s390/sparc64)

["Ulrich Weigand" <uweigand at de dot ibm dot com>]

Daniel Jacobowitz wrote:
> On Wed, Jun 13, 2007 at 03:06:11PM +0200, Ulrich Weigand wrote:
> > However, this macro is not fully equivalent; in particular it
> > is no longer possible to use &builtin_type_double.
> 
> You keep saying this, but is it true? :-)

Well, you can take the address, but you won't get the gdbarch-swap
effect any more.  So if you were relying on that, it'll break ...

> You can't take the address of a function's return value, but you can
> take the address of a dereference.  Of course using
> &builtin_type_double in m68k_gdbarch_init won't work since
> current_gdbarch is NULL then.  But we should be able to save
> builtin_type (gdbarch)->builtin_double if we wanted to, I think.

Not really, as the per-gdbarch data elements are allocated only
*after* gdbarch_init returns.  (At least those installed using
gdbarch_data_register_post_init as builtin_type is.)

So calling builtin_type (gdbarch) within m68k_gdbarch_init should
itself return NULL.

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com