On Fri, Jul 25, 2014 at 2:37 AM, AKASHI Takahiro
[off-list ref] wrote:

I found a bug in my current patch (v5). When 32-bit tracer skips a system call,
we should not update syscallno from x8 since syscallno is re-written directly
via ptrace(PTRACE_SET_SYSCALL).

Ah, yes. Will aarch64 have a PTRACE_SET_SYSCALL option, or is this
strictly a 32-bit vs 64-bit issue?

I'm sure that my next version should work with 32/64-bit tracers on 64-bit
kernel.

Do you have a git tree uploaded anywhere? I'd love to follow this more
closely. When do you expect a v6?

Thanks!

-Kees

-- 
Kees Cook
Chrome OS Security