diff options
Diffstat (limited to 'arch/x86/boot/startup/Makefile')
| -rw-r--r-- | arch/x86/boot/startup/Makefile | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/boot/startup/Makefile b/arch/x86/boot/startup/Makefile index b514f7e81332..e8fdf020b422 100644 --- a/arch/x86/boot/startup/Makefile +++ b/arch/x86/boot/startup/Makefile @@ -4,6 +4,7 @@ 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 $(srctree)/include/linux/hidden.h @@ -19,6 +20,7 @@ KCOV_INSTRUMENT := n obj-$(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-$(CONFIG_EFI_MIXED) += efi-mixed.o @@ -28,3 +30,23 @@ lib-$(CONFIG_EFI_MIXED) += efi-mixed.o # 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)) |