linux-kernel - Re: [PATCH V9 20/20] riscv: compat: Add COMPAT Kbuild skeletal support

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Message-ID: <20220524220646.GA3990738@roeck-us.net>
Date:   Tue, 24 May 2022 15:06:46 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Guo Ren <guoren@...nel.org>
Cc:     Palmer Dabbelt <palmer@...belt.com>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Christoph Hellwig <hch@....de>,
        linux-arch <linux-arch@...r.kernel.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>,
        Parisc List <linux-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>,
        Heiko Stübner <heiko@...ech.de>,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [PATCH V9 20/20] riscv: compat: Add COMPAT Kbuild skeletal
 support

On Wed, May 25, 2022 at 01:46:38AM +0800, Guo Ren wrote:
[ ... ]

> > The problem is come from "__dls3's vdso decode part in musl's
> > ldso/dynlink.c". The ehdr->e_phnum & ehdr->e_phentsize are wrong.
> >
> > I think the root cause is from musl's implementation with the wrong
> > elf parser. I would fix that soon.
> Not elf parser, it's "aux vector just past environ[]". I think I could
> solve this, but anyone who could help dig in is welcome.
> 

I am not sure I understand what you are saying here. Point is that my
root file system, generated with musl a year or so ago, crashes with
your patch set applied. That is a regression, even if there is a bug
in musl.

Guenter