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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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84fe419dc7
KASLR implementation relies on a relocatable kernel so that we can move the kernel mapping. The seed needed to virtually move the kernel is taken from the device tree, so we rely on the bootloader to provide a correct seed. Zkr could be used unconditionnally instead if implemented, but that's for another patch. Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Tested-by: Conor Dooley <conor.dooley@microchip.com> Tested-by: Song Shuai <songshuaishuai@tinylab.org> Reviewed-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Sami Tolvanen <samitolvanen@google.com> Link: https://lore.kernel.org/r/20230722123850.634544-2-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
39 lines
1.2 KiB
Makefile
39 lines
1.2 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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# This file was copied from arm64/kernel/pi/Makefile.
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KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) -fpie \
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-Os -DDISABLE_BRANCH_PROFILING $(DISABLE_STACKLEAK_PLUGIN) \
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$(call cc-option,-mbranch-protection=none) \
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-I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \
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-D__DISABLE_EXPORTS -ffreestanding \
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-fno-asynchronous-unwind-tables -fno-unwind-tables \
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$(call cc-option,-fno-addrsig)
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KBUILD_CFLAGS += -mcmodel=medany
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CFLAGS_cmdline_early.o += -D__NO_FORTIFY
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CFLAGS_lib-fdt_ro.o += -D__NO_FORTIFY
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GCOV_PROFILE := n
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KASAN_SANITIZE := n
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KCSAN_SANITIZE := n
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UBSAN_SANITIZE := n
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KCOV_INSTRUMENT := n
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$(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ \
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--remove-section=.note.gnu.property \
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--prefix-alloc-sections=.init.pi
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$(obj)/%.pi.o: $(obj)/%.o FORCE
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$(call if_changed,objcopy)
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$(obj)/lib-%.o: $(srctree)/lib/%.c FORCE
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$(call if_changed_rule,cc_o_c)
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$(obj)/string.o: $(srctree)/lib/string.c FORCE
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$(call if_changed_rule,cc_o_c)
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$(obj)/ctype.o: $(srctree)/lib/ctype.c FORCE
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$(call if_changed_rule,cc_o_c)
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obj-y := cmdline_early.pi.o fdt_early.pi.o string.pi.o ctype.pi.o lib-fdt.pi.o lib-fdt_ro.pi.o
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extra-y := $(patsubst %.pi.o,%.o,$(obj-y))
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