Messages in this thread | | | From | Denys Vlasenko <> | Subject | Re: Testing of function/data-sections on linux-2.6.35-rc4 | Date | Mon, 26 Jul 2010 03:31:34 +0200 |
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Hi Sam,
On Friday 23 July 2010 22:35, Sam Ravnborg wrote: > > > > Then, in order to also garbage-collect the sections, I added > > > > LDFLAGS_vmlinux += --gc-sections > > > > in top-level Makefile. > > > > This requires the additional patch (linux-2.6.35-rc4-fsgs.patch) > > which adds KEEP(section) directives to kernel linker stripts. > > Otherwise, linker will discard some crucial sections. > > > > Changelog does not address why you need: > > -Map $@.ldmap > > and what effect they have.
I didn't plan to push the last step (--gc-sections) to mainline yet. Thus the patch has debugging stuff in it.
> And it is obvious that some archs should consolidate a little more from > asm-generic/vmlinux.lds.h. > But that said this patch looks much better than the initial versions posted. > > How do you determine which sections needs the KEEP()? > Worth documenting for future when we add new sections.
No problem, I will be adding comments at every KEEP() why it's needed.
-- vda
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