cvs commit: src/lib/libc/i386/gen _setjmp.S setjmp.S

[David Schultz]

On Sun, Jun 29, 2008, Bruce Evans wrote:
> On Sat, 28 Jun 2008, David Schultz wrote:
> > Don't clobber the FPU exception flags in longjmp.  C99 requires them
> > to remain unchanged.
> >
> >...but got cut off somehow.
> 
> This is wrong.  It breaks longjmp() from all COMPAT_[3-4] signal
> handlers (not just ones for SIGFPE).  I don't like the corresponding
> change for amd64 either, and only approved it since amd64 doesn't
> support COMPAT_[3-4] signal handlers.

How is it possible for an application linked against an 8.X libc,
and which is doing anything even remotely close to reasonable,
to get COMPAT_3 or COMPAT_4 signal behavior?