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>
47 lines
1.7 KiB
Makefile
47 lines
1.7 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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purgatory-y := head.o purgatory.o string.o sha256.o mem.o
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targets += $(purgatory-y) purgatory.lds purgatory purgatory.chk purgatory.ro
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PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
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$(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE
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$(call if_changed_rule,cc_o_c)
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CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY
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$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
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$(call if_changed_rule,as_o_S)
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KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes
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KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
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KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
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KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common
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KBUILD_CFLAGS += -fno-stack-protector
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KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
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KBUILD_CFLAGS += $(CLANG_FLAGS)
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KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
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KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))
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# Since we link purgatory with -r unresolved symbols are not checked, so we
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# also link a purgatory.chk binary without -r to check for unresolved symbols.
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PURGATORY_LDFLAGS := -nostdlib -z nodefaultlib
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LDFLAGS_purgatory := -r $(PURGATORY_LDFLAGS) -T
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LDFLAGS_purgatory.chk := -e purgatory_start $(PURGATORY_LDFLAGS)
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$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE
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$(call if_changed,ld)
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$(obj)/purgatory.chk: $(obj)/purgatory FORCE
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$(call if_changed,ld)
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OBJCOPYFLAGS_purgatory.ro := -O elf64-s390
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OBJCOPYFLAGS_purgatory.ro += --remove-section='*debug*'
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OBJCOPYFLAGS_purgatory.ro += --remove-section='.comment'
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OBJCOPYFLAGS_purgatory.ro += --remove-section='.note.*'
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$(obj)/purgatory.ro: $(obj)/purgatory $(obj)/purgatory.chk FORCE
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$(call if_changed,objcopy)
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$(obj)/kexec-purgatory.o: $(obj)/purgatory.ro
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obj-y += kexec-purgatory.o
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