On Sun, Aug 05, 2007 at 10:56:04AM +0200, Axel Reinhold wrote: > i found a bug in linux-2.4.35. > > the bug produces a crashing kernel when compiled > with gcc >=4.2.0 and VIA C3 optimized -march=c3 > (CONFIG_MCYRIXIII=y) > > this issue was first discussed on the gcc bugzilla: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32264 > > and tracked down to the include/asm-i386/hw_irq.h > module with the help of the gcc guys: > > (pluto at agmk dot net) wrote: > >yup, i see something new :) > > > >please look at line 12137 of i8259.i: > > > >__attribute__((regparm(0))) void call_do_IRQ(void); __asm__(... > > > >as you can see there is a semicolon after call_do_IRQ(void) > >and following asm statement isn't treated as a function body. > >in this way -O1 -f{no-}unit-at-a-time accidentally produces > >different code. it's not a gcc bug. > > > >linux-2.4.35/include/asm-i386/hw_irq.h > >contains these evil macros. > > is there a chance to fix this? > these macros a far beyond my capabilities to fix.
That's one of the ugliest things I've discovered to date ! I have no idea how to fix it, I'm downloading gcc-4.2 right now to try to find a solution. I've never compiled 2.4 with gcc 4.2, so there may be surprises. Regards, Willy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
