Messages in this thread | | | Date | Wed, 27 Oct 2004 15:55:37 -0400 | From | John Richard Moser <> | Subject | Re: Reserving a syscall number |
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linux-os wrote: | 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). |
I'm attempting to figure a way to control the IBM stack smash protector via a flag in the ELF header, without opening the executable image on disk and checking manually. If there is a way to do this from userspace, that would be acceptable.
| | 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. |
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