linux-kernel - Re: [PATCH v7 2/4] x86/stackvalidate: Compile-time stack validation

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Message-ID: <20150714205738.GO19282@twins.programming.kicks-ass.net>
Date:	Tue, 14 Jul 2015 22:57:38 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Josh Poimboeuf <jpoimboe@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Michal Marek <mmarek@...e.cz>,
	Andy Lutomirski <luto@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Pedro Alves <palves@...hat.com>, x86@...nel.org,
	live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 2/4] x86/stackvalidate: Compile-time stack validation

On Tue, Jul 14, 2015 at 12:14:08PM -0500, Josh Poimboeuf wrote:
> This adds a CONFIG_STACK_VALIDATION option which enables a host tool
> named stackvalidate which runs at compile time.  It analyzes every .o
> file and ensures the validity of its stack metadata.  It enforces a set
> of rules on asm code and C inline assembly code so that stack traces can
> be reliable.
> 
> Currently it checks frame pointer usage.  I plan to add DWARF CFI
> validation as well.

Validation or Annotation, as in the generation of DWARF CFI info?
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