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Date: Mon, 11 Aug 2014 10:31:22 +0100
From: "Jan Beulich" <JBeulich@suse.com>
To: "Andy Lutomirski" <luto@amacapital.net>
Cc: "Kees Cook" <keescook@chromium.org>, "Will Drewry" <wad@chromium.org>,
        "Frederic Weisbecker" <fweisbec@gmail.com>,
        "Denys Vlasenko" <vda.linux@googlemail.com>, "X86 ML" <x86@kernel.org>,
        "Alexei Starovoitov" <ast@plumgrid.com>,
        "Denys Vlasenko" <dvlasenk@redhat.com>,
        "Oleg Nesterov" <oleg@redhat.com>,
        "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
        "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 4/5] x86: entry_64.S: always allocate complete
 "struct pt_regs"
References: <1406904498-21647-1-git-send-email-dvlasenk@redhat.com>
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>>> On 11.08.14 at 11:07, <luto@amacapital.net> wrote:
> How does one test the entry CFI annotations?  The best that I know of
> is to single-step through using gdb attached to qemu and see whether
> backtraces seem to work.

Or have the kernel generate a backtrace from a suitable location and
check that the backtrace is correct (of course provided you have Dwarf
stack unwinding support in your kernel).

Jan