From: Andrew Cooper <Andrew.Cooper3@citrix.com>
To: Peter Zijlstra <peterz@infradead.org>,
Joao Moreira <joao@overdrivepizza.com>
Cc: Kees Cook <keescook@chromium.org>,
"x86@kernel.org" <x86@kernel.org>,
"hjl.tools@gmail.com" <hjl.tools@gmail.com>,
"jpoimboe@redhat.com" <jpoimboe@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"ndesaulniers@google.com" <ndesaulniers@google.com>,
"samitolvanen@google.com" <samitolvanen@google.com>,
"llvm@lists.linux.dev" <llvm@lists.linux.dev>
Subject: Re: [RFC][PATCH 6/6] objtool: Add IBT validation / fixups
Date: Wed, 16 Feb 2022 00:57:47 +0000 [thread overview]
Message-ID: <a599d509-8995-0eb6-65a1-5d8505e4851e@citrix.com> (raw)
In-Reply-To: <20220211133803.GV23216@worktop.programming.kicks-ass.net>
On 11/02/2022 13:38, Peter Zijlstra wrote:
> Now, this setup provides:
>
> - minimal size (please yell if there's a smaller option I missed;
> s/ud2/int3/ ?)
It's probably best not to overload int3. #BP is already has magic
properties, and what happens if someone wants to breakpoint one of these?
I'll make my usual into suggestion for 64bit builds.
ud2 is the sensible approach, with a caveat that whatever is hiding here
should have metadata.
~Andrew
next prev parent reply other threads:[~2022-02-16 0:57 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-22 17:03 [RFC][PATCH 0/6] x86: Kernel IBT beginnings Peter Zijlstra
2021-11-22 17:03 ` [RFC][PATCH 1/6] x86: Annotate _THIS_IP_ Peter Zijlstra
2021-11-23 13:53 ` Mark Rutland
2021-11-23 14:14 ` Peter Zijlstra
2021-11-24 18:18 ` Josh Poimboeuf
2021-11-22 17:03 ` [RFC][PATCH 2/6] x86: Base IBT bits Peter Zijlstra
2022-02-08 23:32 ` Kees Cook
2021-11-22 17:03 ` [RFC][PATCH 3/6] x86: Add ENDBR to IRET-to-Self Peter Zijlstra
2021-11-22 18:09 ` Peter Zijlstra
2022-02-08 23:33 ` Kees Cook
2021-11-22 17:03 ` [RFC][PATCH 4/6] objtool: Read the _THIS_IP_ hints Peter Zijlstra
2021-11-22 17:03 ` [RFC][PATCH 5/6] x86: Sprinkle ENDBR dust Peter Zijlstra
2021-11-23 14:00 ` Mark Rutland
2021-11-23 14:21 ` Peter Zijlstra
2022-02-08 23:38 ` Kees Cook
2021-11-22 17:03 ` [RFC][PATCH 6/6] objtool: Add IBT validation / fixups Peter Zijlstra
2021-11-24 19:30 ` Josh Poimboeuf
2022-02-08 23:43 ` Kees Cook
2022-02-09 5:09 ` Josh Poimboeuf
2022-02-09 11:41 ` Peter Zijlstra
2022-02-09 11:45 ` Peter Zijlstra
2021-12-24 2:05 ` joao
2022-02-08 23:42 ` Kees Cook
2022-02-09 2:21 ` Joao Moreira
2022-02-09 4:05 ` Kees Cook
2022-02-09 5:18 ` Joao Moreira
2022-02-11 13:38 ` Peter Zijlstra
2022-02-14 21:38 ` Sami Tolvanen
2022-02-14 22:25 ` Peter Zijlstra
2022-02-15 16:56 ` Sami Tolvanen
2022-02-15 20:03 ` Kees Cook
2022-02-15 21:05 ` Peter Zijlstra
2022-02-15 23:05 ` Kees Cook
2022-02-15 23:38 ` Joao Moreira
2022-02-16 12:24 ` Peter Zijlstra
2022-02-15 20:53 ` Peter Zijlstra
2022-02-15 22:45 ` Joao Moreira
2022-02-16 0:57 ` Andrew Cooper [this message]
2022-03-02 3:06 ` Peter Collingbourne
2022-03-02 3:32 ` Joao Moreira
2022-06-08 17:53 ` Fāng-ruì Sòng
2022-06-09 0:05 ` Sami Tolvanen
2021-11-23 7:58 ` [RFC][PATCH 0/6] x86: Kernel IBT beginnings Christoph Hellwig
2021-11-23 9:02 ` Peter Zijlstra
2022-02-08 23:48 ` Kees Cook
2022-02-09 0:09 ` Nick Desaulniers
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