This series is a followup to the single patch 'modversions: treat symbol
CRCs as 32 bit quantities on 64 bit archs', of which three versions have
been sent out so far [0][1][2]
Given the recent issues regarding modversions, I have added some more
people to cc this time.
As pointed out by Michael, GNU ld behaves a bit differently between arm64
and PowerPC64, and where the former gets rid of all runtime relocations
related to CRCs, the latter is not as easily convinced.
Patch #1 fixes the issue where CRCs are corrupted by the runtime relocation
routines for 32-bit PowerPC, for which the original fix was effectively
reverted by commit 0e0ed6406e61 ("powerpc/modules: Module CRC relocation fix
causes perf issues")
Patch #2 adds handling of R_PPC64_ADDR32 relocations against the NULL .dynsym
symbol entry to the PPC64 runtime relocation routines, so it is prepared to
deal with CRCs being emitted as 32-bit quantities.
Patch #3 is the original patch from the v1 and v2 submissions.
Changes since v3:
- rebased onto v4.10-rc
- add Suzuki's ack to patch #1
- update patch #2 to work around the binutils-powerpc behavior to only
account for R_PPC64_RELATIVE relocations in the RELACOUNT entry in
.dynamic
Changes since v2:
- added #1 and #2
- updated #3 to deal with CRC entries being emitted from assembler
- added Rusty's ack (#3)
Branch can be found here:
https://git.kernel.org/cgit/linux/kernel/git/ardb/linux.git/log/?h=kcrctab-reloc
[0] http://marc.info/?l=linux-kernel&m=147652300207369&w=2
[1] http://marc.info/?l=linux-kernel&m=147695629614409&w=2
[2] http://marc.info/?l=linux-kernel&m=147758564705776&w=2
Ard Biesheuvel (3):
powerpc/reloc32: fix corrupted modversion CRCs
powerpc/reloc64: add support for 32-bit CRC pseudo-symbols
modversions: treat symbol CRCs as 32 bit quantities on 64 bit archs
arch/powerpc/include/asm/module.h | 4 --
arch/powerpc/kernel/module_64.c | 8 ---
arch/powerpc/kernel/reloc_32.S | 36 ++++++++++--
arch/powerpc/kernel/reloc_64.S | 60 ++++++++++++--------
arch/powerpc/kernel/vmlinux.lds.S | 1 +
arch/powerpc/relocs_check.sh | 5 +-
include/asm-generic/export.h | 7 +--
include/linux/export.h | 8 +++
include/linux/module.h | 14 ++---
kernel/module.c | 47 ++++++---------
10 files changed, 105 insertions(+), 85 deletions(-)
--
2.7.4
