Re: [PATCH 1/2] tracing/syscalls: allow multiple syscall numbers per syscall

Andy Lutomirski
2016-08-29T23:55:27Z

On Aug 29, 2016 11:30 AM, "Marcin Nowakowski"
<marcin.nowakowski-1AXoQHu6uovQT0dZR+AlfA@public.gmane.org> wrote:
>
> Syscall metadata makes an assumption that only a single syscall number
> corresponds to a given method. This is true for most archs, but
> can break tracing otherwise.
>
> For MIPS platforms, depending on the choice of supported ABIs, up to 3
> system call numbers can correspond to the same call - depending on which
> ABI the userspace app uses.

MIPS isn't special here. x86 does the same thing. Why isn't this a
problem on x86?

Also, you seem to be partially reinventing AUDIT_ARCH here. Can you
use that and integrate with syscall_get_arch()?

--Andy