linux/arch/powerpc
Anton Blanchard 1674400aae powerpc: Fix -mcmodel=medium breakage in prom_init.c
Commit 5ac47f7a6e (powerpc: Relocate prom_init.c on 64bit) made
prom_init.c position independent by manually relocating its entries
in the TOC.

We get the address of the TOC entries with the __prom_init_toc_start
linker symbol. If __prom_init_toc_start ends up as an entry in the
TOC then we need to add an offset to get the current address. This is
the case for older toolchains.

On the other hand, if we have a newer toolchain that supports
-mcmodel=medium then __prom_init_toc_start will be created by a
relative offset from r2 (the TOC pointer). Since r2 has already been
relocated, nothing more needs to be done.  Adding an offset in this
case is wrong and Aaro Koskinen and Alexander Graf have noticed noticed
G5 and OpenBIOS breakage.

Alan Modra suggested we just use r2 to get at the TOC which is simpler
and works with both old and new toolchains.

Reported-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anton Blanchard <anton@samba.org>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-03-13 10:06:52 +11:00
..
boot Merge remote-tracking branch 'agust/next' into next 2013-02-20 11:39:05 +11:00
configs Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
crypto powerpc: Fix compile of sha1-powerpc-asm.S on 32-bit 2013-03-05 16:56:26 +11:00
include powerpc: Add DSCR FSCR register bit definition 2013-03-05 16:56:30 +11:00
kernel powerpc: Fix -mcmodel=medium breakage in prom_init.c 2013-03-13 10:06:52 +11:00
kvm hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
lib uprobes/powerpc: Add dependency on single step emulation 2013-01-29 11:35:06 +11:00
math-emu
mm powerpc: Fix STAB initialization 2013-03-13 10:06:22 +11:00
net PPC: net: bpf_jit_comp: add VLAN instructions for BPF JIT 2012-11-17 22:12:47 -05:00
oprofile Merge branch 'merge' into next 2013-01-29 11:33:37 +11:00
perf Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-02-23 17:09:55 -08:00
platforms powerpc: Remove last traces of POWER4_ONLY 2013-03-13 10:06:49 +11:00
sysdev Merge remote-tracking branch 'agust/next' into next 2013-02-20 11:39:05 +11:00
xmon powerpc: Rename set_break to avoid naming conflict 2013-01-16 05:25:47 +11:00
Kconfig arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS 2013-02-27 19:10:23 -08:00
Kconfig.debug
Makefile powerpc: Avoid load of static chain register when calling nested functions through a pointer on 64bit 2013-01-10 17:01:27 +11:00
relocs_check.pl