7f7f6f7ad6
Now Kbuild provides reasonable defaults for objtool, sanitizers, and profilers. Remove redundant variables. Note: This commit changes the coverage for some objects: - include arch/mips/vdso/vdso-image.o into UBSAN, GCOV, KCOV - include arch/sparc/vdso/vdso-image-*.o into UBSAN - include arch/sparc/vdso/vma.o into UBSAN - include arch/x86/entry/vdso/extable.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso-image-*.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vdso32-setup.o into KASAN, KCSAN, UBSAN, GCOV, KCOV - include arch/x86/entry/vdso/vma.o into GCOV, KCOV - include arch/x86/um/vdso/vma.o into KASAN, GCOV, KCOV I believe these are positive effects because all of them are kernel space objects. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Roberto Sassu <roberto.sassu@huawei.com>
1.7 KiB
SPDX-License-Identifier: GPL-2.0
Copyright 2022 Google LLC
KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie
-Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN)
$(DISABLE_LATENT_ENTROPY_PLUGIN)
$(call cc-option,-mbranch-protection=none)
-I$(srctree)/scripts/dtc/libfdt -fno-stack-protector
-include $(srctree)/include/linux/hidden.h
-D__DISABLE_EXPORTS -ffreestanding -D__NO_FORTIFY
-fno-asynchronous-unwind-tables -fno-unwind-tables
$(call cc-option,-fno-addrsig)
this code may run with the MMU off so disable unaligned accesses
CFLAGS_map_range.o += -mstrict-align
remove SCS flags from all objects in this directory
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
disable LTO
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
hostprogs := relacheck
quiet_cmd_piobjcopy = $(quiet_cmd_objcopy) cmd_piobjcopy = $(cmd_objcopy) && $(obj)/relacheck $(@) $(<)
$(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=_pi
--remove-section=.note.gnu.property
$(obj)/%.pi.o: $(obj)/%.o $(obj)/relacheck FORCE
$(call if_changed,piobjcopy)
ensure that all the lib- code ends up as __init code and data
$(obj)/lib-%.pi.o: OBJCOPYFLAGS += --prefix-alloc-sections=.init
$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE $(call if_changed_rule,cc_o_c)
obj-y := idreg-override.pi.o
map_kernel.pi.o map_range.pi.o
lib-fdt.pi.o lib-fdt_ro.pi.o
obj-$(CONFIG_RELOCATABLE) += relocate.pi.o
obj-$(CONFIG_RANDOMIZE_BASE) += kaslr_early.pi.o
obj-$(CONFIG_UNWIND_PATCH_PAC_INTO_SCS) += patch-scs.pi.o
extra-y := $(patsubst %.pi.o,%.o,$(obj-y))