Al Viro wrote:
> AFAICS, the patch below should do it for i386; instead of
> using a dummy loop to tell gcc that this sucker never returns,
> we do
> static void __always_inline __noreturn __BUG(const char *file, int line);
> containing the actual asm we want to insert and define BUG() as
> __BUG(__FILE__, __LINE__). It looks safe, but I don't claim enough
> experience with gcc __asm__ potential nastiness, so...
>
> Comments, objections?
>
Does it work? When I wrote the BUG code I tried this, but gcc kept
warning about "noreturn function returns". I couldn't work out a way to
convince gcc that the asm is the end of the line.
I'm actually in favour of dropping the loop and the noreturn stuff
altogether. It means that gcc thinks everything is live at the time of
the BUG, and the debugging info at the point of the ud2a is more useful.
J
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