Re: Reserving a syscall number

[linux-os]

On Wed, 27 Oct 2004, John Richard Moser wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> How would one go about having a specific syscall number reserved in
> entry.S?  I'm exploring doing a kill inside the kernel from a detection
> done in userspace, which would allow the executable header of the binary
> to indicate whether the task should be killed or not; if it works, the
> changes will likely not go into mainline, but will still require a
> non-changing syscall index (assuming I understood the syscall manpage
> properly).
>
> On a side note, if a syscall doesn't exist, how would that be detected
> in userspace?
> - --

Look at ld.so.preload for potential capabilities to control any
executable.

Also what's the problem with sending the task a signal when
the detection has been done?

If the usual capabilites are not sufficient, then make
a driver (module).


Cheers,
Dick Johnson
Penguin : Linux version 2.6.9 on an i686 machine (5537.79 BogoMips).
 Notice : All mail here is now cached and reviewed by John Ashcroft.
                 98.36% of all statistics are fiction.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/