"H. J. Lu" wrote:
> On Tue, Jul 16, 2002 at 09:16:48PM +0200, Carsten Langgaard wrote:
> > Thanks.
> > Now that we are at it, what should personality return in case it's called with a
> > value, which isn't defined in the personality.h file.
> > Should it return -EINVAL ?
> > I don't think, that is the case at the moment, I believe you can set personality
> > to anything.
> >
>
> Like this?
>
No, I don't think the patch is correct.
I don't know how this actually should work, maybe someone who do know can help out
here.
But it look like the idea is, that we have a default execution domain (linux), which
have pers_low = 0 (PER_LINUX) and pers_high = 0.
If one want other execution domains, one much call the register_exec_domain to
register the execution domain and personality.
So if personality is call with a value that isn't register, it then accept the
personality and sets the execution domain to the default settings (which is linux).
So the question is should personality, return -EINVAL, if it got a personality value
which hasn't been registered or should it accept the personality, but set the
execution domain to the default setting ?
If the later is true, should it also accept values outside the values defined in the
personality.h file ?
So what should the following user calls return, if not registered in the kernel?
personality(PER_BSD):
personality(0x47):
Could someone with a better understand than I, please comment this.
>
> H.J.
> ---
> --- kernel/exec_domain.c.per Mon Jun 10 10:05:27 2002
> +++ kernel/exec_domain.c Tue Jul 16 19:06:13 2002
> @@ -223,7 +223,8 @@ sys_personality(u_long personality)
>
> if (personality != 0xffffffff) {
> set_personality(personality);
> - if (current->personality != personality)
> + if (personality < current->exec_domain->pers_low
> + || personality > current->exec_domain->pers_high)
> return -EINVAL;
> }
>
--
_ _ ____ ___ Carsten Langgaard Mailto:carstenl@mips.com
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