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afedc3126e
Early code designates the code executed when the MMU is not yet enabled, and this comes with some limitations (see Documentation/arch/riscv/boot.rst, section "Pre-MMU execution"). FORTIFY_SOURCE must be disabled then since it can trigger kernel panics as reported in [1]. Reported-by: Jason Montleon <jmontleo@redhat.com> Closes: https://lore.kernel.org/linux-riscv/CAJD_bPJes4QhmXY5f63GHV9B9HFkSCoaZjk-qCT2NGS7Q9HODg@mail.gmail.com/ [1] Fixes:a35707c3d8("riscv: add memory-type errata for T-Head") Fixes:26e7aacb83("riscv: Allow to downgrade paging mode from the command line") Cc: stable@vger.kernel.org Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/20241009072749.45006-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
42 lines
1.5 KiB
Makefile
42 lines
1.5 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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-include $(srctree)/include/linux/hidden.h \
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-D__DISABLE_EXPORTS -ffreestanding \
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-fno-asynchronous-unwind-tables -fno-unwind-tables \
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$(call cc-option,-fno-addrsig)
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# Disable LTO
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KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS))
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KBUILD_CFLAGS += -mcmodel=medany
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CFLAGS_cmdline_early.o += -D__NO_FORTIFY
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CFLAGS_fdt_early.o += -D__NO_FORTIFY
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# lib/string.c already defines __NO_FORTIFY
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CFLAGS_ctype.o += -D__NO_FORTIFY
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CFLAGS_lib-fdt.o += -D__NO_FORTIFY
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CFLAGS_lib-fdt_ro.o += -D__NO_FORTIFY
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CFLAGS_archrandom_early.o += -D__NO_FORTIFY
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$(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 archrandom_early.pi.o
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extra-y := $(patsubst %.pi.o,%.o,$(obj-y))
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