On Fri, 2017-08-18 at 15:49 -0700, Ram Pai wrote:

Coming back to the your main question, "why we need to provide the
contents of AMR register to the signal handler?" --   the only reason
i can see is, probably tools like gdb and ptrace may find it useful.

And since it was suggested that content of IAMR is also useful to the
application, the value of which cannot be accessed from userspace,
it may make sense to provide both the contents.

I'd rather you added ptrace calls to obtain & set it. I don't think we
need to touch the signal frame, it's too much of an ABI compatibility
burden.

Cheers,
Ben.