Messages in this thread | | | Date | Sat, 22 Feb 2020 07:55:21 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 2/2] x86/boot/compressed: Remove unnecessary sections from bzImage |
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On Fri, Feb 21, 2020 at 10:08:45PM -0700, Nathan Chancellor wrote: > On Thu, Jan 09, 2020 at 10:02:18AM -0500, Arvind Sankar wrote: > > Discarding the sections that are unused in the compressed kernel saves > > about 10 KiB on 32-bit and 6 KiB on 64-bit, mostly from .eh_frame. > > > > Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu> > > --- > > arch/x86/boot/compressed/vmlinux.lds.S | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/arch/x86/boot/compressed/vmlinux.lds.S b/arch/x86/boot/compressed/vmlinux.lds.S > > index 508cfa6828c5..12a20603d92e 100644 > > --- a/arch/x86/boot/compressed/vmlinux.lds.S > > +++ b/arch/x86/boot/compressed/vmlinux.lds.S > > @@ -73,4 +73,9 @@ SECTIONS > > #endif > > . = ALIGN(PAGE_SIZE); /* keep ZO size page aligned */ > > _end = .; > > + > > + /* Discard all remaining sections */ > > + /DISCARD/ : { > > + *(*) > > + } > > } > > -- > > 2.24.1 > > > > This patch breaks linking with ld.lld: > > $ make -j$(nproc) -s CC=clang LD=ld.lld O=out.x86_64 distclean defconfig bzImage > ld.lld: error: discarding .shstrtab section is not allowed
Well, why is it not allowed? And why isn't the GNU linker complaining?
-- Regards/Gruss, Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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