linux-kernel - Re: [PATCH] C6X: add support to build with BINFMT_ELF

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Message-ID: <1335129679.12741.4.camel@deneb.redhat.com>
Date:	Sun, 22 Apr 2012 17:21:18 -0400
From:	Mark Salter <msalter@...hat.com>
To:	Mike Frysinger <vapier.adi@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Aurelien Jacquiot <a-jacquiot@...com>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] C6X: add support to build with BINFMT_ELF_FDPIC

On Sat, 2012-04-21 at 01:01 -0400, Mike Frysinger wrote:
> On Fri, Apr 20, 2012 at 17:47, Mark Salter wrote:
> > --- a/arch/c6x/kernel/process.c
> > +++ b/arch/c6x/kernel/process.c
> >
> > +
> > +/* Fill in the fpu structure for a core dump. This is easy -- we don't have any */
> > +int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
> > +{
> > +       /* Not valid */
> > +       return 0;
> > +}
> 
> you could avoid this like Blackfin has:
> arch/blackfin/include/asm/elf.h:
> #define ELF_CORE_COPY_FPREGS(...) 0     /* Blackfin has no FPU */

Yes, thanks. That's a better way I missed.

> 
> > --- a/fs/Kconfig.binfmt
> > +++ b/fs/Kconfig.binfmt
> >
> >  config BINFMT_ELF_FDPIC
> >        bool "Kernel support for FDPIC ELF binaries"
> >        default y
> > -       depends on (FRV || BLACKFIN || (SUPERH32 && !MMU))
> > +       depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || TMS320C6X)
> 
> shouldn't the main arch symbol be "C6X" to match arch/c6x/ ?

It probably should have been. Most architectures use that convention but
there are notable exceptions like powerpc and sh.

> -mike


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