On Mon, Oct 15, 2001 at 11:02:58AM -0500, Timur Tabi wrote:
> David Ford wrote:
>
> > That should throw a segmentation fault, in the kernel an OOPS, in this
> > statement the code is trying to dereference a NULL pointer and store a
> > value at 0x0.
>
>
> I much smarter way to do this would be to use this code:
>
> static inline void int3(void) { __asm__ __volatile__ (".byte 0xCC\n"); };
>
> Granted, it's x86-specific, but it works better, since gdb will halt the code
> right at that spot rather than inside some trap hander. And it's just more
> elegant.
If you want to do it like that, I'd suggest ud2 for in-kernel use:
#define b0rk() asm volatile("ud2")
--
Mark Zealey (aka JALH on irc.openprojects.net: #zealos and many more)
mark@zealos.org
mark@itsolve.co.uk
UL++++>$ G!>(GCM/GCS/GS/GM) dpu? s:-@ a16! C++++>$ P++++>+++++$ L+++>+++++$
!E---? W+++>$ N- !o? !w--- O? !M? !V? !PS !PE--@ PGP+? r++ !t---?@ !X---?
!R- b+ !tv b+ DI+ D+? G+++ e>+++++ !h++* r!-- y--
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