powerpc: Fix build bug with binutils < 2.18 and GCC < 4.2

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binutils < 2.18 has a bug that makes it misbehave when taking an
ELF file with all segments at load address 0 as input.  This
happens when running "strip" on vmlinux, because of the AT() magic
in this linker script.  People using GCC >= 4.2 won't run into
this problem, because the "build-id" support will put some data
into the "notes" segment (at a non-zero load address).

To work around this, we force some data into both the "dummy"
segment and the kernel segment, so the dummy segment will get a
non-zero load address.  It's not enough to always create the
"notes" segment, since if nothing gets assigned to it, its load
address will be zero.

Signed-off-by: Segher Boessenkool <segher@kernel.crashing.org>
Tested-By: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

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Segher Boessenkool 2008-07-22 09:03:45 +10:00 • committed by Benjamin Herrenschmidt

parent f36c5227cd

commit c69cccc95f

1 changed files with 28 additions and 3 deletions

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arch/powerpc/kernel/vmlinux.lds.S

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