On Fri, 10 Nov 2000, Alexander Viro wrote:
> diff -urN rc11-2/include/asm-i386/processor.h
>rc11-2-show_task/include/asm-i386/processor.h
> --- rc11-2/include/asm-i386/processor.h Fri Nov 10 09:14:04 2000
> +++ rc11-2-show_task/include/asm-i386/processor.h Fri Nov 10 16:08:15 2000
> @@ -412,7 +412,7 @@
> */
> extern inline unsigned long thread_saved_pc(struct thread_struct *t)
> {
> - return ((unsigned long *)t->esp)[3];
> + return ((unsigned long **)t->esp)[0][1];
> }
The above needs to get verified: it should be something like
unsigned long *ebp = *((unsigned long **)t->esp);
if ((void *) ebp < (void *) t)
return 0;
if ((void *) ebp >= (void *) t + 2*PAGE_SIZE)
return 0;
if (3 & (unsigned long)ebp)
return 0;
return *ebp;
because otherwise I guarantee that we'll eventually have a bug with a
invalid pointer reference in the debugging code and that would be bad.
Linus
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