linux-kernel - Re: [PATCH -fixes] riscv: Fix relocatable kernels with early alternatives using -fno-pie

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Message-ID: <20230529-skillet-quarters-3fbc3b6edb3a@spud>
Date:   Mon, 29 May 2023 20:06:58 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Alexandre Ghiti <alexghiti@...osinc.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Andreas Schwab <schwab@...ux-m68k.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -fixes] riscv: Fix relocatable kernels with early
 alternatives using -fno-pie

On Mon, May 29, 2023 at 08:51:57PM +0200, Alexandre Ghiti wrote:
> 
> On 28/05/2023 15:56, Conor Dooley wrote:
> > On Sun, May 28, 2023 at 03:42:59PM +0200, Alexandre Ghiti wrote:
> > > Hmmm, it still works for me with both clang and gcc-9.
> > gcc-9 is a bit of a relic, do you have more recent compilers lying
> > around? If not, I can try some older compilers at some point.
> > 
> > > You don't have to do that now but is there a way I could get your compiled
> > > image? With the sha1 used to build it? Sorry, I don't see what happens, I
> > > need to get my hands dirty in some debug!
> > What do you mean by "sha1"? It falls with v6.4-rc1 which is a stable
> > hash, if that's what you're looking for.
> > 
> > Otherwise,
> > https://github.com/ConchuOD/riscv-env/releases/download/v2022.03/vmlinux.bin
> > (ignore the release crap haha, too lazy to find a proper hosting
> > mechanism)
> 
> 
> Ok, I don't get much info without the symbols, can you also provide the
> vmlinux please? But at least your image does not boot, not during the early
> boot though because the mmu is enabled.

Do you see anything print when you try it? Cos I do not. Iff I have time
tomorrow, I'll go poking with gdb. I'm sorry I have not really done any
investigating, I have been really busy this last week or so with
dt-binding stuff but I should be freer again from tomorrow.

https://github.com/ConchuOD/riscv-env/releases/download/v2022.03/vmlinux

> I tried with gcc-12 and it still works fine on my end, so frustrating!

Crap! Also, should you not be enjoying a public holiday rather than
debugging?! Or maybe debugging is enjoyable for you...

Cheers,
Conor.

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