diff options
Diffstat (limited to 'arch/x86/purgatory/Makefile')
| -rw-r--r-- | arch/x86/purgatory/Makefile | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 17f09dc26381..5ce1d4263000 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -1,5 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 -OBJECT_FILES_NON_STANDARD := y purgatory-y := purgatory.o stack.o setup-x86_$(BITS).o sha256.o entry64.o string.o @@ -12,7 +11,16 @@ $(obj)/string.o: $(srctree)/arch/x86/boot/compressed/string.c FORCE $(obj)/sha256.o: $(srctree)/lib/crypto/sha256.c FORCE $(call if_changed_rule,cc_o_c) -CFLAGS_sha256.o := -D__DISABLE_EXPORTS +CFLAGS_sha256.o := -D__DISABLE_EXPORTS -D__NO_FORTIFY + +# When profile-guided optimization is enabled, llvm emits two different +# overlapping text sections, which is not supported by kexec. Remove profile +# optimization flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) + +# When LTO is enabled, llvm emits many text sections, which is not supported +# by kexec. Remove -flto=* flags. +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO),$(KBUILD_CFLAGS)) # When linking purgatory.ro with -r unresolved symbols are not checked, # also link a purgatory.chk binary without -r to check for unresolved symbols. @@ -21,20 +29,13 @@ LDFLAGS_purgatory.ro := -r $(PURGATORY_LDFLAGS) LDFLAGS_purgatory.chk := $(PURGATORY_LDFLAGS) targets += purgatory.ro purgatory.chk -# Sanitizer, etc. runtimes are unavailable and cannot be linked here. -GCOV_PROFILE := n -KASAN_SANITIZE := n -UBSAN_SANITIZE := n -KCSAN_SANITIZE := n -KMSAN_SANITIZE := n -KCOV_INSTRUMENT := n - # These are adjustments to the compiler flags used for objects that # make up the standalone purgatory.ro PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel -PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss -g0 -PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN) -DDISABLE_BRANCH_PROFILING +PURGATORY_CFLAGS := -mcmodel=small -ffreestanding -fno-zero-initialized-in-bss -g0 +PURGATORY_CFLAGS += -fpic -fvisibility=hidden +PURGATORY_CFLAGS += $(DISABLE_KSTACK_ERASE) -DDISABLE_BRANCH_PROFILING PURGATORY_CFLAGS += -fno-stack-protector # Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That @@ -52,11 +53,11 @@ ifdef CONFIG_STACKPROTECTOR_STRONG PURGATORY_CFLAGS_REMOVE += -fstack-protector-strong endif -ifdef CONFIG_RETPOLINE +ifdef CONFIG_MITIGATION_RETPOLINE PURGATORY_CFLAGS_REMOVE += $(RETPOLINE_CFLAGS) endif -ifdef CONFIG_CFI_CLANG +ifdef CONFIG_CFI PURGATORY_CFLAGS_REMOVE += $(CC_FLAGS_CFI) endif @@ -69,8 +70,7 @@ CFLAGS_sha256.o += $(PURGATORY_CFLAGS) CFLAGS_REMOVE_string.o += $(PURGATORY_CFLAGS_REMOVE) CFLAGS_string.o += $(PURGATORY_CFLAGS) -AFLAGS_REMOVE_setup-x86_$(BITS).o += -Wa,-gdwarf-2 -AFLAGS_REMOVE_entry64.o += -Wa,-gdwarf-2 +asflags-remove-y += $(foreach x, -g -gdwarf-4 -gdwarf-5, $(x) -Wa,$(x)) $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE $(call if_changed,ld) |