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

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Date:   Tue, 23 Aug 2016 13:21:04 +1000
From:   Balbir Singh <bsingharora@...il.com>
To:     Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>
Cc:     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>,
        Oliver O'Halloran <oohall@...il.com>
Subject: Re: [PATCH v5 04/13] powerpc: Factor out relocation code from
 module_64.c to elf_util_64.c.


> 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

Balbir Singh