linux-kernel - Re: [PATCH V3 10/17] riscv: compat: Add elf.h implementation

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Date:   Thu, 20 Jan 2022 21:35:56 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Anup Patel <anup@...infault.org>,
        gregkh <gregkh@...uxfoundation.org>,
        liush <liush@...winnertech.com>, Wei Fu <wefu@...hat.com>,
        Drew Fustini <drew@...gleboard.org>,
        Wang Junqiang <wangjunqiang@...as.ac.cn>,
        Christoph Hellwig <hch@....de>,
        Christoph Hellwig <hch@...radead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        linux-csky@...r.kernel.org,
        linux-s390 <linux-s390@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        inux-parisc@...r.kernel.org,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH V3 10/17] riscv: compat: Add elf.h implementation

On Thu, Jan 20, 2022 at 9:33 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> On Thu, Jan 20, 2022 at 8:39 AM <guoren@...nel.org> wrote:
> > From: Guo Ren <guoren@...ux.alibaba.com>
> >
> > Implement necessary type and macro for compat elf. See the code
> > comment for detail.
> >
> > Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
>
> Reviewed-by: Arnd Bergmann <arnd@...db.de>
>
> > +
> > +/*
> > + * FIXME: not sure SET_PERSONALITY for compat process is right!
> > + */
> > +#define SET_PERSONALITY(ex)                                    \
> > +do {    if ((ex).e_ident[EI_CLASS] == ELFCLASS32)              \
> > +               set_thread_flag(TIF_32BIT);                     \
> > +       else                                                    \
> > +               clear_thread_flag(TIF_32BIT);                   \
> > +       if (personality(current->personality) != PER_LINUX32)   \
> > +               set_personality(PER_LINUX |                     \
> > +                       (current->personality & (~PER_MASK)));  \
> > +} while (0)
> > +
>
> The implementation looks good to me now,  you can remove that comment above it.
Thx for pointing it out. I forgot.

>
>         Arnd



-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/