| # SPDX-License-Identifier: GPL-2.0 |
| |
| KBUILD_AFLAGS += -D__DISABLE_EXPORTS |
| KBUILD_CFLAGS += -D__DISABLE_EXPORTS -mcmodel=small -fPIC \ |
| -Os -DDISABLE_BRANCH_PROFILING \ |
| $(DISABLE_STACKLEAK_PLUGIN) \ |
| $(DISABLE_LATENT_ENTROPY_PLUGIN) \ |
| -fno-stack-protector -D__NO_FORTIFY \ |
| -fno-jump-tables \ |
| -include $(srctree)/include/linux/hidden.h |
| |
| # disable ftrace hooks and LTO |
| KBUILD_CFLAGS := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) |
| KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS)) |
| KASAN_SANITIZE := n |
| KCSAN_SANITIZE := n |
| KMSAN_SANITIZE := n |
| UBSAN_SANITIZE := n |
| KCOV_INSTRUMENT := n |
| |
| obj-$(CONFIG_X86_64) += gdt_idt.o map_kernel.o |
| obj-$(CONFIG_AMD_MEM_ENCRYPT) += sme.o sev-startup.o |
| pi-objs := $(patsubst %.o,$(obj)/%.o,$(obj-y)) |
| |
| lib-$(CONFIG_X86_64) += la57toggle.o |
| lib-$(CONFIG_EFI_MIXED) += efi-mixed.o |
| |
| # |
| # Disable objtool validation for all library code, which is intended |
| # to be linked into the decompressor or the EFI stub but not vmlinux |
| # |
| $(patsubst %.o,$(obj)/%.o,$(lib-y)): OBJECT_FILES_NON_STANDARD := y |
| |
| # |
| # Invoke objtool for each object individually to check for absolute |
| # relocations, even if other objtool actions are being deferred. |
| # |
| $(pi-objs): objtool-enabled = 1 |
| $(pi-objs): objtool-args = $(if $(delay-objtool),,$(objtool-args-y)) --noabs |
| |
| # |
| # Confine the startup code by prefixing all symbols with __pi_ (for position |
| # independent). This ensures that startup code can only call other startup |
| # code, or code that has explicitly been made accessible to it via a symbol |
| # alias. |
| # |
| $(obj)/%.pi.o: OBJCOPYFLAGS := --prefix-symbols=__pi_ |
| $(obj)/%.pi.o: $(obj)/%.o FORCE |
| $(call if_changed,objcopy) |
| |
| targets += $(obj-y) |
| obj-y := $(patsubst %.o,%.pi.o,$(obj-y)) |
