[PATCH 6/6] ARM: support kernel modules in BE8 mode

[Nicolas Pitre]

On Tue, 22 Nov 2011, Bi Junxiao wrote:

> on 11/22/2011 03:29 AM Nicolas Pitre wrote:
> > On Tue, 15 Nov 2011, Junxiao Bi wrote:
> > 
> >    
> > > From: Stanley.Miao<stanley.miao at windriver.com>
> > > 
> > > In BE8 mode, data must be manipulated in big endian format while
> > > text must be little endian. Therefore, when relocating the text
> > > section of module in BE8 mode, we must convert the location offset
> > > of the text to big endian from the native little endian. After
> > > the relocation is complete, the location offset value is re-written
> > > as little endian.
> > > 
> > > Since only BE8 mode has such special requirement while other big endian
> > > mode not, cpu_to_le32 and le32_to_cpu can not be used to relocate the
> > > text. We introduce write_instr* and read_instr* to do it.
[...]
> > If only module.c requires this, please move those definitions there.
> >    
> Not only modules, all components that needs to read and write text segment
> like kprobes also needs this. As it is special to arm be8, how about define it
> in arch/arm/include/asm/swab.h?

There is a patch series proposed by Leif Lindholm adding generic ARM 
instruction condition code check that creates an opcode.h file.  That 
would be an ideal location for opcode accessor definitions.


Nicolas