linux-kernel - Re: [PATCH v8 1/3] riscv: Introduce CONFIG

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Date:   Fri, 19 May 2023 23:48:59 +0200
From:   Andreas Schwab <schwab@...ux-m68k.org>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Alexandre Ghiti <alexghiti@...osinc.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v8 1/3] riscv: Introduce CONFIG_RELOCATABLE

On Mai 19 2023, Alexandre Ghiti wrote:

> I have tested the following patch successfully, can you give it a try
> while I make sure this is the only place I forgot to add the -fno-pie
> flag?
>
> diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> index fbdccc21418a..153864e4f399 100644
> --- a/arch/riscv/kernel/Makefile
> +++ b/arch/riscv/kernel/Makefile
> @@ -23,6 +23,10 @@ ifdef CONFIG_FTRACE
>  CFLAGS_REMOVE_alternative.o = $(CC_FLAGS_FTRACE)
>  CFLAGS_REMOVE_cpufeature.o = $(CC_FLAGS_FTRACE)
>  endif
> +ifdef CONFIG_RELOCATABLE
> +CFLAGS_alternative.o += -fno-pie
> +CFLAGS_cpufeature.o += -fno-pie
> +endif
>  ifdef CONFIG_KASAN
>  KASAN_SANITIZE_alternative.o := n
>  KASAN_SANITIZE_cpufeature.o := n

I can confirm that this fixes the crash.

-- 
Andreas Schwab, schwab@...ux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
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