On Fri, Aug 08, 2014 at 08:35:42AM +0100, AKASHI Takahiro wrote:

On 08/06/2014 12:08 AM, Kees Cook wrote:

quoted

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

quoted

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?

As discussed in a few weeks ago, aarch64 won't support PTRACE_SET_SYSCALL.

Well, I don't think anything was set in stone. If you have a compelling
reason why adding the new request gives you something over setting w8
directly, then we can extend ptrace.

Will