linux-kernel - Re: [PATCH RFC 00/43] x86/pie: Make kernel image's virtual address flexible

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Message-ID: <20230428152206.GA1464060@hirez.programming.kicks-ass.net>
Date:   Fri, 28 Apr 2023 17:22:06 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Hou Wenlong <houwenlong.hwl@...group.com>
Cc:     linux-kernel@...r.kernel.org,
        Thomas Garnier <thgarnie@...omium.org>,
        Lai Jiangshan <jiangshan.ljs@...group.com>,
        Kees Cook <keescook@...omium.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, bpf@...r.kernel.org,
        llvm@...ts.linux.dev
Subject: Re: [PATCH RFC 00/43] x86/pie: Make kernel image's virtual address
 flexible


For some raison I didn't get 0/n but did get all of the others. Please
keep your Cc list consistent.

On Fri, Apr 28, 2023 at 05:50:40PM +0800, Hou Wenlong wrote:

>   - It is not allowed to reference global variables in an alternative
>     section since RIP-relative addressing is not fixed in
>     apply_alternatives(). Fortunately, all disallowed relocations in the
>     alternative section can be captured by objtool. I believe that this
>     issue can also be fixed by using objtool.

https://lkml.kernel.org/r/Y9py2a5Xw0xbB8ou@hirez.programming.kicks-ass.net