So here is a slightly updated FTRACE_WITH_REGS plus live patching.
Reminder: make sure you have a prolog-pad gcc, and this in your
top level Makefile:
ifdef CONFIG_LIVEPATCH
KBUILD_CFLAGS += $(call cc-option,-fno-ipa-ra)
endif
Tested with v4.7-rc3 + gcc-6.1
Changes since v1:
* instead of a comment "should be CC_USING_PROLOG_PAD":
do it. CC_FLAGS_FTRACE holds it now, and the IPA
disabler has become a separate issue (see above).
Torsten Duwe (2):
arm64: implement FTRACE_WITH_REGS
arm64: implement live patching
arch/arm64/Kconfig | 4 ++
arch/arm64/Makefile | 4 ++
arch/arm64/include/asm/ftrace.h | 8 +++
arch/arm64/include/asm/livepatch.h | 37 ++++++++++++++
arch/arm64/kernel/Makefile | 6 +--
arch/arm64/kernel/entry-ftrace.S | 102 +++++++++++++++++++++++++++++++++++++
arch/arm64/kernel/ftrace.c | 43 ++++++++++++++--
include/asm-generic/vmlinux.lds.h | 2 +-
include/linux/compiler.h | 4 ++
9 files changed, 203 insertions(+), 7 deletions(-)
create mode 100644 arch/arm64/include/asm/livepatch.h
--
2.6.6
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