brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 23:36:23 +09:00
Code Issues Projects Releases Wiki Activity

powerpc: disable KASAN instrumentation on early/critical files.

Browse Source 
All files containing functions run before kasan_early_init() is called
must have KASAN instrumentation disabled.

For those file, branch profiling also have to be disabled otherwise
each if () generates a call to ftrace_likely_update().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy 2019-04-26 16:23:33 +00:00 committed by Michael Ellerman
parent b4abe38fd6
commit f072015c7b
6 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
arch/powerpc/kernel/Makefile
View File

@ -31,6 +31,18 @@ CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
endif
KASAN_SANITIZE_early_32.o := n
KASAN_SANITIZE_cputable.o := n
KASAN_SANITIZE_prom_init.o := n
KASAN_SANITIZE_btext.o := n
ifdef CONFIG_KASAN
CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y := cputable.o ptrace.o syscalls.o \
irq.o align.o signal_32.o pmc.o vdso.o \
process.o systbl.o idle.o \

8
arch/powerpc/lib/Makefile
View File

@ -8,6 +8,14 @@ ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC)
CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
KASAN_SANITIZE_code-patching.o := n
KASAN_SANITIZE_feature-fixups.o := n
ifdef CONFIG_KASAN
CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y += alloc.o code-patching.o feature-fixups.o
ifndef CONFIG_KASAN

6
arch/powerpc/mm/Makefile
View File

@ -5,6 +5,12 @@
ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC)
KASAN_SANITIZE_ppc_mmu_32.o := n
ifdef CONFIG_KASAN
CFLAGS_ppc_mmu_32.o += -DDISABLE_BRANCH_PROFILING
endif
obj-y := fault.o mem.o pgtable.o mmap.o \
init_$(BITS).o pgtable_$(BITS).o \
pgtable-frag.o \

6
arch/powerpc/platforms/powermac/Makefile
View File

@ -2,6 +2,12 @@
CFLAGS_bootx_init.o += -fPIC
CFLAGS_bootx_init.o += $(call cc-option, -fno-stack-protector)
KASAN_SANITIZE_bootx_init.o := n
ifdef CONFIG_KASAN
CFLAGS_bootx_init.o += -DDISABLE_BRANCH_PROFILING
endif
ifdef CONFIG_FUNCTION_TRACER
# Do not trace early boot code
CFLAGS_REMOVE_bootx_init.o = $(CC_FLAGS_FTRACE)

3
arch/powerpc/purgatory/Makefile
View File

@ -1,4 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
KASAN_SANITIZE := n
targets += trampoline.o purgatory.ro kexec-purgatory.c
LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined

1
arch/powerpc/xmon/Makefile
View File

@ -7,6 +7,7 @@ subdir-ccflags-y := $(call cc-disable-warning, builtin-requires-header)
GCOV_PROFILE := n
KCOV_INSTRUMENT := n
UBSAN_SANITIZE := n
KASAN_SANITIZE := n
# Disable ftrace for the entire directory
ORIG_CFLAGS := $(KBUILD_CFLAGS)