RE: [PING] [RFC-v3] Add windows Thread Information Block

["Pierre Muller" <pierre dot muller at ics-cnrs dot unistra dot fr>]

Hi Pedro,

> -----Message d'origine-----
> De?: gdb-patches-owner@sourceware.org [mailto:gdb-patches-
> owner@sourceware.org] De la part de Pedro Alves
> Envoyé?: Thursday, March 11, 2010 1:24 AM
> À?: gdb-patches@sourceware.org
> Cc?: Pierre Muller
> Objet?: Re: [PING] [RFC-v3] Add windows Thread Information Block
> 
> On Wednesday 10 March 2010 17:14:19, Pierre Muller wrote:
> > +typedef struct thread_information_block_32
> > +  {
> > +    uint32_t current_seh;                      /* %fs:0x0000 */
> > +    uint32_t current_top_of_stack;             /* %fs:0x0004 */
> > +    uint32_t current_bottom_of_stack;          /* %fs:0x0008 */
> > +    uint32_t sub_system_tib;                   /* %fs:0x000c */
> > +    uint32_t fiber_data;                       /* %fs:0x0010 */
> > +    uint32_t arbitrary_data_slot;              /* %fs:0x0014 */
> > +    uint32_t linear_address_tib;               /* %fs:0x0018 */
> > +    uint32_t environment_pointer;              /* %fs:0x001c */
> > +    uint32_t process_id;                       /* %fs:0x0020 */
> > +    uint32_t current_thread_id;                        /* %fs:0x0024
> */
> > +    uint32_t thread_local_storage;             /* %fs:0x0028 */
> > +    uint32_t active_rpc_handle;                        /* %fs:0x002c
> */
> > +    uint32_t process_environment_block;                /* %fs:0x0030
> */
> > +    uint32_t last_error_number;                        /* %fs:0x0034
> */
> > +  }
> > +thread_information_32;
> 
> Where did you get these offsets from?
> According to
> <http://en.wikipedia.org/wiki/Win32_Thread_Information_Block>,
> thread_local_storage should be 0x2c, and active_rpc_handle 0x28, as in,
> someone has it swapped.

  Strange because, IIRC, this is the source where I got the offsets too...

>  I think I actually tested that wikipedia had
> it
> right last time I asked you this, but in any case, can you confirm?

  I checked it on gdb itself, but both fields are zeroed.
Now I remember having read somewhere that 
for newer Windows OS, the Thread Local Storage block is inside the 
Thread Information block itself:
see same Wikipedia page:
address : FS[0xE10]  length : 256 description : TLS slots, 4 bytes per slot
so I will need to check on an older Win9X virtual machine
before I can answer this question.

Pierre