gdbserver Linux_low.c

gdbserver Linux_low.c

[Raja Saleru]

 
Hi 
 
In gdbserver source file Linux_low.c look at the following data structure 
 
static struct target_ops linux_target_ops = {
  linux_create_inferior,
  linux_attach,
  linux_kill,
  linux_thread_alive,
  linux_resume,
  linux_wait,
  linux_fetch_registers,
  linux_store_registers,
  linux_read_memory,
  linux_write_memory,
  linux_look_up_symbols,
};
 
the last member linux_look_up_symbols, what this function does ?
 
This is assigned to the following function
 
linux_look_up_symbols (void)
{
#ifdef USE_THREAD_DB
  if (using_threads)
    return;
 
  using_threads = thread_db_init ();
#endif
}
 
Actually where it does any symbol related functionality ?
 
can anybody clarrify these questions ? Thanks in advance
 
Regards
Raja Saleru 
   
 

Re: gdbserver Linux_low.c

[Daniel Jacobowitz]

On Mon, Jun 09, 2003 at 06:55:14PM +0900, Raja Saleru wrote:
>  
> Hi 
>  
> In gdbserver source file Linux_low.c look at the following data structure 
>  
> static struct target_ops linux_target_ops = {
>   linux_create_inferior,
>   linux_attach,
>   linux_kill,
>   linux_thread_alive,
>   linux_resume,
>   linux_wait,
>   linux_fetch_registers,
>   linux_store_registers,
>   linux_read_memory,
>   linux_write_memory,
>   linux_look_up_symbols,
> };
>  
> the last member linux_look_up_symbols, what this function does ?
>  
> This is assigned to the following function
>  
> linux_look_up_symbols (void)
> {
> #ifdef USE_THREAD_DB
>   if (using_threads)
>     return;
>  
>   using_threads = thread_db_init ();
> #endif
> }
>  
> Actually where it does any symbol related functionality ?
>  
> can anybody clarrify these questions ? Thanks in advance

If you look at the linuxthreads_db/ directory in glibc source, you'll
see the trick - thread_db_init calls back into the application.  Take a
look at gdbserver/proc-service.c, function ps_pglobal_lookup.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer

Re: gdbserver Linux_low.c

[Daniel Jacobowitz]

You've started sending mail from 2002 again.  Please fix that.

On Mon, Jun 10, 2002 at 10:51:19AM +0900, Raja Saleru wrote:
> 
> Thank u very much, I will look at in depth.
> 
> If we disable to thread support, then in gdb server side does it also does
> the symbolic adress finding ? I think not.  Im I right ?

I don't know what you mean.

> To get all the posted mailings to my inbox what can I have to do ? can u
> tell me please ?

See http://sources.redhat.com/gdb/ for information on how to subscribe.

> 
> Regards
> Raja S
> 
> 
> 
> 
> 
> -------Original Message-------
>  
> From: Daniel Jacobowitz
> Date: 2003?N06??09?? 22:21:04
> To: Raja Saleru
> Cc: Gdb Redhat
> Subject: Re: gdbserver Linux_low.c
>  
> On Mon, Jun 09, 2003 at 06:55:14PM +0900, Raja Saleru wrote:
> >
> > Hi
> >
> > In gdbserver source file Linux_low.c look at the following data structure
> >
> > static struct target_ops linux_target_ops = {
> > linux_create_inferior,
> > linux_attach,
> > linux_kill,
> > linux_thread_alive,
> > linux_resume,
> > linux_wait,
> > linux_fetch_registers,
> > linux_store_registers,
> > linux_read_memory,
> > linux_write_memory,
> > linux_look_up_symbols,
> > };
> >
> > the last member linux_look_up_symbols, what this function does ?
> >
> > This is assigned to the following function
> >
> > linux_look_up_symbols (void)
> > {
> > #ifdef USE_THREAD_DB
> > if (using_threads)
> > return;
> >
> > using_threads = thread_db_init ();
> > #endif
> > }
> >
> > Actually where it does any symbol related functionality ?
> >
> > can anybody clarrify these questions ? Thanks in advance
>  
> If you look at the linuxthreads_db/ directory in glibc source, you'll
> see the trick - thread_db_init calls back into the application. Take a
> look at gdbserver/proc-service.c, function ps_pglobal_lookup.
>  
> --
> Daniel Jacobowitz
> MontaVista Software Debian GNU/Linux Developer
>  
> .


-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer