[PATCH 9/9] Add compressed image support

[Johannes Stezenbach]

On Thu, Jul 19, 2012 at 07:41:25PM +0200, Sascha Hauer wrote:
> On Thu, Jul 19, 2012 at 07:08:45PM +0200, Johannes Stezenbach wrote:
> > On Thu, Jul 19, 2012 at 10:13:02AM +0200, Sascha Hauer wrote:
> > > --- a/Makefile
> > > +++ b/Makefile
> > ...
> > > +ifdef CONFIG_IMAGE_COMPRESSION_LZO
> > > +barebox: piggy.lzo.o
> > > +	@echo "  LD     " $@
> > > +	$(Q)$(LD) $(LDFLAGS) $(LDFLAGS_barebox) -o $@ \
> > > +		-T $(barebox-compressed-lds) $(barebox-compressed) \
> > > +		--start-group $(barebox-common) piggy.lzo.o --end-group
> > > +else
> > 
> > Where is barebox-compressed set?
> > 
> > I tried it and it fails to link:
> > 
> >   LD      arch/arm/lib/built-in.o
> >   LD      barebox-uncompressed
> >   SYSMAP  System.map
> >   OBJCOPY barebox-uncompressed.bin
> >   LZO     barebox-uncompressed.bin.lzo
> >   CC      piggy.lzo.o
> >   LD      barebox
> > common/built-in.o: In function `start_barebox':
> > .../barebox/common/startup.c:154: undefined reference to `__barebox_initcalls_start'
> > .../barebox/common/startup.c:154: undefined reference to `__barebox_initcalls_end'
> > 
> > $ make V=1
> > ...
> >   LD      barebox
> > arm-linux-ld -EL  -Map barebox.map -static --gc-sections -o barebox \
> >                 -T arch/arm/lib/barebox-compressed.lds  \
> >                 --start-group  common/built-in.o  drivers/built-in.o  commands/built-in.o  lib/built-in.o  crypto/built-in.o  net/built-in.o  fs/built-in.o  arch/arm/boards/foo/built-in.o  arch/arm/mach-foo/built-in.o  arch/arm/lib/built-in.o  arch/arm/cpu/built-in.o piggy.lzo.o --end-group
> > 
> > 
> > It shouldn't link all the -built-in.o into the uncompressor, should it?
> > Or is it supposed to work via --gc-sections trick?
> 
> Yes, it works using --gc-sections. Are you building a defconfig or a
> custom one? If the error above is correct start_barebox is referenced
> from the decompressor code. This should not happen.

I'm building a custom one (unpublished code).  It has some SPI flash
boot assembly code, I guess that might cause the issue wrt the new section
annotations.  I'll look at it tomorrow.  However, I still wonder
about the empty $(barebox-compressed)?


Thanks
Johannes