linux-kernel - Re: [RFC PATCH v2 00/13] objtool: add base support for arm64

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Message-ID: <YD/g2G3Yi8o99f7H@hirez.programming.kicks-ass.net>
Date:   Wed, 3 Mar 2021 20:17:44 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Julien Thierry <jthierry@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        catalin.marinas@....com, will@...nel.org, mark.rutland@....com,
        ardb@...nel.org, masahiroy@...nel.org, jpoimboe@...hat.com,
        ycote@...hat.com
Subject: Re: [RFC PATCH v2 00/13] objtool: add base support for arm64

On Wed, Mar 03, 2021 at 06:09:19PM +0100, Julien Thierry wrote:
> Hi,
> 
> This series enables objtool to start doing stack validation on arm64
> kernel builds. 

> -->
> 
> Julien Thierry (12):
>   tools: Add some generic functions and headers
>   tools: arm64: Make aarch64 instruction decoder available to tools
>   tools: bug: Remove duplicate definition
>   objtool: arm64: Add base definition for arm64 backend
>   objtool: arm64: Decode add/sub instructions
>   objtool: arm64: Decode jump and call related instructions
>   objtool: arm64: Decode other system instructions
>   objtool: arm64: Decode load/store instructions
>   objtool: arm64: Decode LDR instructions
>   objtool: arm64: Accept padding in code sections
>   objtool: arm64: Handle supported relocations in alternatives
>   objtool: arm64: Ignore replacement section for alternative callback
> 
> Raphael Gault (1):
>   objtool: arm64: Enable stack validation for arm64


These patches look very reasonable to me,

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>


One selfish thing, would it make sense to have a make target that builds
all supported srcarch targets?

This might be useful when hacking on objtool to make sure everything
builds.