cvs commit: src/lib/libc/i386/gen _setjmp.S setjmp.S
das at FreeBSD.ORG
Sun Jun 29 02:22:39 UTC 2008
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?
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