[PATCH] i386/x86-64: adjust unwind information register encodings

[H. J. Lu]

On Fri, May 06, 2005 at 06:04:45PM +0200, Jan Beulich wrote:
> >>> "H. J. Lu" <hjl@lucon.org> 06.05.05 17:33:26 >>>
> >On Fri, May 06, 2005 at 05:05:48PM +0200, Jan Beulich wrote:
> >> >>> "H. J. Lu" <hjl@lucon.org> 06.05.05 16:00:38 >>>
> >> >On Fri, May 06, 2005 at 02:01:21PM +0200, Jan Beulich wrote:
> >> >> The register numbers used in x86-64's .eh_frame entries neither matched the
> >> >> ABI nor the gcc implementation. Additionally, a significant amount of
> >> >> registers were missing in both 32- and 64-bit modes (even now there are, but
> >> >> only those for which there don't appear to be register numbers assigned in
> >> >> the respective ABI).
> >> >> 
> >> >
> >> >Have we been generating wrong unwind info up to now?
> >> 
> >> Yes, it looks like that.
> >
> >How has it ever worked with glibc and gdb?
> 
> Because the CFI directives are rarely used, and (as Daniel pointed out) only some registers were mis-numbered.
> 

CFI directives are used in glibc. Have you double checked them?


H.J.