linux-kernel - Re: [PATCH v5 04/13] powerpc: Factor out relocation code from module_64.c to elf_util

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Message-Id: <2306975.WkzT978XXa@hactar>
Date:   Tue, 23 Aug 2016 21:53:12 -0300
From:   Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
To:     "Oliver O'Halloran" <oohall@...il.com>
Cc:     Balbir Singh <bsingharora@...il.com>, kexec@...ts.infradead.org,
        Stewart Smith <stewart@...ux.vnet.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Baoquan He <bhe@...hat.com>, linuxppc-dev@...ts.ozlabs.org,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Paul Mackerras <paulus@...ba.org>,
        Eric Biederman <ebiederm@...ssion.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dave Young <dyoung@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vivek Goyal <vgoyal@...hat.com>
Subject: Re: [PATCH v5 04/13] powerpc: Factor out relocation code from module_64.c to elf_util_64.c.

Am Mittwoch, 24 August 2016, 10:50:26 schrieb Oliver O'Halloran:
> On Tue, Aug 23, 2016 at 1:21 PM, Balbir Singh <bsingharora@...il.com> 
wrote:
> >> zImage on ppc64 BE is an ELF32 file. This patch set only supports
> >> loading
> >> ELF files of the same class as the kernel, so a 64 bit kernel can't
> >> load an ELF32 file. It would be possible to add such support, but it
> >> would be a new feature.
> >> 
> >> The distros I was able to check on ppc64 LE and BE all use vmlinux.
> >> kexec-tools with kexec_load also doesn't support zImage. Do you think
> >> it is important to support zImage?
> > 
> > Well if it didn't work already, I think its low priority. Michael should
> > be able to confirm this. Oliver's been trying to cleanup the zImage to
> > get rid the old zImage limitation, cc'ing him
> 
> I don't think it's ever worked so I wouldn't worry too much about
> supporting it. Fixing kexec-into-zImage and fixing the 32bit wrapper
> on 64bit BE kernel problem has been on my TODO list for a while, but
> it's not a priority.

Ok, thanks for your input.

-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center