mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-31 14:13:39 +00:00
57fbad15c2
In preparation for adding Clang sanitizer coverage stack depth tracking that can support stack depth callbacks: - Add the new top-level CONFIG_KSTACK_ERASE option which will be implemented either with the stackleak GCC plugin, or with the Clang stack depth callback support. - Rename CONFIG_GCC_PLUGIN_STACKLEAK as needed to CONFIG_KSTACK_ERASE, but keep it for anything specific to the GCC plugin itself. - Rename all exposed "STACKLEAK" names and files to "KSTACK_ERASE" (named for what it does rather than what it protects against), but leave as many of the internals alone as possible to avoid even more churn. While here, also split "prev_lowest_stack" into CONFIG_KSTACK_ERASE_METRICS, since that's the only place it is referenced from. Suggested-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20250717232519.2984886-1-kees@kernel.org Signed-off-by: Kees Cook <kees@kernel.org>
43 lines
1.5 KiB
Makefile
43 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 $(DISABLE_KSTACK_ERASE) \
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$(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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