Re : [gdbserver][WinCE][ARM] gdbserver crash: issue with GetThreadContext???

[Matthieu H <maat_h at yahoo dot fr>]

Pierre, you are absolutely right, thank you!
I'll check this then


----- Message d'origine ----
> De : Pierre Muller <pierre.muller@ics-cnrs.unistra.fr>
> À : Matthieu H <mhameau@yahoo.fr>
> Cc : Pedro Alves <pedro@codesourcery.com>; gdb@sourceware.org
> Envoyé le : Mar 15 février 2011, 10h 10min 31s
> Objet : RE: [gdbserver][WinCE][ARM] gdbserver crash: issue with 
>GetThreadContext???
> 
> 
> 
> > -----Message d'origine-----
> > De : gdb-owner@sourceware.org [mailto:gdb-owner@sourceware.org] De  la
> > part de Matthieu H
> > Envoyé : mardi 15 février 2011  09:53
> > À : Pedro Alves; gdb@sourceware.org
> > Objet : Re :  [gdbserver][WinCE][ARM] gdbserver crash: issue with
> >  GetThreadContext???
> > 
> > Many thanks Pedro.
> > 
> > I  tested this:
> > 
> > >   char buffer[2048];
> > >    memset (buffer, 0xaa, sizeof buffer);
> > >   GetThreadContext  (th->h, (CONTEXT *)buffer);
> > >   // add code that dumps the  buffer contents
> > 
> > then printed out the contents of the buffer  into a file after the call
> > to
> > GetThreadContext.
> > 
> >  Surprisingly the contents of the buffer did not changed at all...???
> > I  will double check, but it is very strange :-/
> 
>   This is because  GetThreadContext only copies some parts of
> the register context depending on  the value of
> the ContextFlags field of the context structure.
> 
>    This flags is probably 0xaaaaaaaaa
> in your case, which is probably  invalid.
>   You should first set a valid value to that field
> (CONTEXT  *)buffer->ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT;
> (as in  gdbserver/win32-arm-low.c)
> and after also check that the function  succeeds
> by testing that the BOOL return value is non zero.
> 
> 
> Pierre  Muller
> GDB pascal language maintainer
> 
> 
> 
> 
>