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Message-ID: <20210203120222.451068583@infradead.org>
Date: Wed, 03 Feb 2021 13:02:22 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Josh Poimboeuf <jpoimboe@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>
Cc: Miroslav Benes <mbenes@...e.cz>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Julien Thierry <jthierry@...hat.com>,
Kees Cook <keescook@...omium.org>, x86@...nel.org,
linux-kernel@...r.kernel.org, peterz@...radead.org
Subject: [PATCH 0/5] objtool: The stack swizzle again
Hi
The stack swizzle is current again, these patches implement objtool support for
the native x86_64 stack swizzle pattern.
It allows Thomas to use his preferred minimal stack swizzle without (much)
limitations.
We used to use SP_INDIRECT with hints back before the entry code rewrite, the
current code relies on asm with a frame-pointer setup, but that all needs to
change again.
Avoid the hint abuse and detect the pattern directly.
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