linux-kernel - Re: [PATCH] powerpc: e500: Fix compilation with gcc e500 compiler

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAK8P3a0qzes1rXJDKF_6j0-KeB5V4M7ZMeHRrNk-KOQwA0vVEw@mail.gmail.com>
Date:   Fri, 8 Jul 2022 22:06:46 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Pali Rohár <pali@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <michael@...erman.id.au>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] powerpc: e500: Fix compilation with gcc e500 compiler

On Fri, Jul 8, 2022 at 7:14 PM Pali Rohár <pali@...nel.org> wrote:
>
> -ifeq ($(HAS_BIARCH),y)
> -ifeq ($(CROSS32_COMPILE),)
> -ifdef CONFIG_PPC32
> -# These options will be overridden by any -mcpu option that the CPU
> -# or platform code sets later on the command line, but they are needed
> -# to set a sane 32-bit cpu target for the 64-bit cross compiler which
> -# may default to the wrong ISA.
> -KBUILD_CFLAGS          += -mcpu=powerpc
> -KBUILD_AFLAGS          += -mcpu=powerpc
> -endif
> -endif

I think to remove these, we first need to ensure that /some/ option is
set for any of
the CPU options.
>
> -ifdef CONFIG_PPC32
> -ifdef CONFIG_PPC_E500MC
> -CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
> -else
> +CFLAGS-$(CONFIG_PPC_E500MC) += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
>  CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
> -endif
> -endif
>

And this part will not do what you want because CONFIG_PPC_E500MC is only
set when CONFIG_E500 is also set, so the -mcpu=e500mc option always
gets overridden by -mcpu=8540

         Arnd