Re: [PATCH] Set TIF_IRET in more places

[Daniel Jacobowitz]

On Tue, Jan 07, 2003 at 06:33:48PM -0800, Linus Torvalds wrote:
> 
> On Tue, 7 Jan 2003, Richard Henderson wrote:
> > > We're open to better ideas ...
> > 
> > Something like having dwarf2 unwind information for the
> > vsyscall page on the page as well?
> 
> What would the unwind info look like? The current BK kernel will put the 
> signal return into the vsyscall page, so gdb could pick up the info from 
> there. But I have no idea what the unwind info looks like, or how to tell 
> gdb about it.

Right now you can't, since GDB won't use the unwind info anyway; but
Richard is probably talking about MD_FALLBACK_FRAME_STATE_FOR, which is
used for exception handling unwinding instead of debugging unwinding.

Someday soon I hope to have GDB properly using this info, too.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer