Messages in this thread | | | From | Andrew Lutomirski <> | Date | Wed, 22 Feb 2012 15:51:40 -0800 | Subject | Re: [PATCH v10 05/11] seccomp: add system call filtering using BPF |
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On Wed, Feb 22, 2012 at 3:46 PM, Indan Zupancic <indan@nul.nu> wrote: > On Wed, February 22, 2012 20:47, Will Drewry wrote: >> On Wed, Feb 22, 2012 at 8:23 AM, Ben Hutchings >>> I would have thought the way to make sure the architecture is always >>> checked is to pack it together with the syscall number. > > I missed that suggestion, putting the syscall number and arch in one > data field would indeed make it harder to not check the arch.
Is there enough room? On x86-64 at least, rax could conceivably be extended to 64 bits some day. Bit 30 is already spoken for by x32.
--Andy
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