Re: [rfa] Attach vsyscall support for GNU/Linux

Daniel Jacobowitz
2004-11-01T16:15:53Z

On Tue, Oct 26, 2004 at 12:12:26AM +0200, Mark Kettenis wrote:
> Date: Sun, 24 Oct 2004 19:16:36 -0400
> From: Daniel Jacobowitz <drow@false.org>
>
> Thanks for the explanation Daniel!
>
> Unwinding bugs aside, I think it's valuable for GDB to know that it is
> at a signal trampoline. I think the custom display in backtrace is
> valuable. That means we should look for signal handlers before looking
> for CFI. For NPTL that value judgement would fall the other way - not
> having to special-case signal handlers is a clear win.
>
> Given the fact that it is desirable for GDB to know that it's dealing
> with a signal handler, I think the correct approach is to extend the
> DWARF2 unwinder with a method to get the frame type, similar to what
> we already do for pre-initializing the register state.
>
> I'll see if I can come up with a patch for you to test.

Had any time for this, Mark? If not, I can try it.

I think this patch is very important for 6.3.

--
Daniel Jacobowitz