Bug#555549: 555549: adding .gnu_debuglink section in kernel modules

[Kurt Roeckx <kurt@roeckx.be>]

On Sat, Aug 14, 2010 at 09:58:24AM +0200, Bastian Blank wrote:
> On Sat, Aug 14, 2010 at 04:17:27AM +0100, Ben Hutchings wrote:
> > [I also wonder why we are copying the unstripped modules into
> > /usr/lib/debug and not just debug info?
> 
> Because the tools can't cope with them.
> 
> >                                          And shouldn't this really be
> > part of Kbuild?  Here's how we could do it in Kbuild:
> 
> >  quiet_cmd_modules_install = INSTALL $@
> > +ifdef INSTALL_MOD_DEBUGLINK
> > +      cmd_modules_install = mkdir -p $(2); mkdir -p $(3); $(OBJCOPY) --only-keep-debug $@ $(3)/$(@F) && $(OBJCOPY) --strip-debug --add-gnu-debuglink=$(3)/$(@F) $@ $(2)/$(@F)
> 
> The link looks wrong, it includes the absolute path during install time.

That's no problem.  Only the filename itself is stored in the
file.  But objcopy wants to read that file to see if it has
debug info.


Kurt