linux-kernel - Re: [PATCH] gcc-plugins: arm_ssp_per_task

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Date:   Thu, 16 May 2019 10:47:08 +0200
From:   Ard Biesheuvel <ard.biesheuvel@...aro.org>
To:     Doug Anderson <dianders@...omium.org>
Cc:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        Kees Cook <keescook@...omium.org>,
        Emese Revfy <re.emese@...il.com>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gcc-plugins: arm_ssp_per_task_plugin: Fix for older GCC < 6

On Sat, 11 May 2019 at 00:42, Doug Anderson <dianders@...omium.org> wrote:
>
> Hi,
>
> > Use gen_rtx_set instead of gen_rtx_SET. The former is a wrapper macro
> > that handles the difference between GCC versions implementing
> > the latter.
> >
> > This fixes the following error on my system with g++ 5.4.0 as the host
> > compiler
> >
> >    HOSTCXX -fPIC scripts/gcc-plugins/arm_ssp_per_task_plugin.o
> >  scripts/gcc-plugins/arm_ssp_per_task_plugin.c:42:14: error: macro "gen_rtx_SET" requires 3 arguments, but only 2 given
> >           mask)),
> >                ^
> >  scripts/gcc-plugins/arm_ssp_per_task_plugin.c: In function ‘unsigned int arm_pertask_ssp_rtl_execute()’:
> >  scripts/gcc-plugins/arm_ssp_per_task_plugin.c:39:20: error: ‘gen_rtx_SET’ was not declared in this scope
> >     emit_insn_before(gen_rtx_SET
> >
> > Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> > ---
> >  scripts/gcc-plugins/arm_ssp_per_task_plugin.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
>
> I can confirm that I was getting compile errors before this patch and
> applying it allowed me to compile and boot.  Thanks!  :-)
>
> Tested-by: Douglas Anderson <dianders@...omium.org>
>

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>