[PATCHv4,Hurd] Add hardware watch support

[Joel Brobecker]

Hello Samuel,

On Fri, Sep 12, 2014 at 08:29:11PM +0200, Samuel Thibault wrote:
> 2014-09-06  Samuel Thibault  <samuel.thibault@ens-lyon.org>
> 
> 	Add hardware watch support to gnu-i386 platform.
> 
>         This allows to get the "watch" command keep native code execution.
> 
> 	* gdb/gdb/gnu-nat.c (inf_threads): New function.
> 	* gdb/gdb/gnu-nat.h (inf_threads_ftype): New type.
> 	(inf_threads): New declaration.
> 	* gdb/gdb/i386gnu-nat.c: Include "x86-nat.h" and "inf-child.h".
> 	[i386_DEBUG_STATE] (i386_gnu_dr_get, i386_gnu_dr_set,
> 	i386_gnu_dr_set_control_one, i386_gnu_dr_set_control,
> 	i386_gnu_dr_set_addr_one, i386_gnu_dr_set_addr, i386_gnu_dr_get_reg,
> 	i386_gnu_dr_get_addr, 386_gnu_dr_get_status, i386_gnu_dr_get_control):
> 	New functions
> 	(reg_addr): New structure.
> 	(_initialize_i386gnu_nat) [i386_DEBUG_STATE]: Initialize hardware i386
> 	debugging register hooks.

This is now OK. I double-checked that Samuel does have a copyright
assignment on file, so Thomas is good to go for pushing the patch in
if he approves as well.  If Sergio has any further comment on the patch,
we can address them as followups.

Thank you,
-- 
Joel