diff options
Diffstat (limited to 'arch/arm64/Makefile')
| -rw-r--r-- | arch/arm64/Makefile | 184 |
1 files changed, 111 insertions, 73 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 76359cfb328a..73a10f65ce8b 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -10,29 +10,17 @@ # # Copyright (C) 1995-2001 by Russell King -LDFLAGS_vmlinux :=--no-undefined -X -CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET) +LDFLAGS_vmlinux :=--no-undefined -X --pic-veneer ifeq ($(CONFIG_RELOCATABLE), y) # Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour # for relative relocs, since this leads to better Image compression # with the relocation offsets always being zero. -LDFLAGS_vmlinux += -shared -Bsymbolic -z notext -z norelro \ - $(call ld-option, --no-apply-dynamic-relocs) +LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --no-apply-dynamic-relocs endif ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) - ifeq ($(call ld-option, --fix-cortex-a53-843419),) -$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum) - else LDFLAGS_vmlinux += --fix-cortex-a53-843419 - endif -endif - -ifeq ($(CONFIG_ARM64_USE_LSE_ATOMICS), y) - ifneq ($(CONFIG_ARM64_LSE_ATOMICS), y) -$(warning LSE atomics not supported by binutils) - endif endif cc_has_k_constraint := $(call try-run,echo \ @@ -45,15 +33,38 @@ ifeq ($(CONFIG_BROKEN_GAS_INST),y) $(warning Detected assembler with broken .inst; disassembly will be unreliable) endif -KBUILD_CFLAGS += -mgeneral-regs-only \ +# The GCC option -ffreestanding is required in order to compile code containing +# ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel) +CC_FLAGS_FPU := -ffreestanding +# Enable <arm_neon.h> +CC_FLAGS_FPU += -isystem $(shell $(CC) -print-file-name=include) +CC_FLAGS_NO_FPU := -mgeneral-regs-only + +KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) \ $(compat_vdso) $(cc_has_k_constraint) -KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_CFLAGS += $(call cc-disable-warning, psabi) KBUILD_AFLAGS += $(compat_vdso) +ifeq ($(call rustc-min-version, 108500),y) +KBUILD_RUSTFLAGS += --target=aarch64-unknown-none-softfloat +else +KBUILD_RUSTFLAGS += --target=aarch64-unknown-none -Ctarget-feature="-neon" +endif + KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) +# Avoid generating .eh_frame* sections. +ifneq ($(CONFIG_UNWIND_TABLES),y) +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables +KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables +KBUILD_RUSTFLAGS += -Cforce-unwind-tables=n +else +KBUILD_CFLAGS += -fasynchronous-unwind-tables +KBUILD_AFLAGS += -fasynchronous-unwind-tables +KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y -Zuse-sync-unwind=n +endif + ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) prepare: stack_protector_prepare stack_protector_prepare: prepare0 @@ -61,34 +72,48 @@ stack_protector_prepare: prepare0 -mstack-protector-guard-reg=sp_el0 \ -mstack-protector-guard-offset=$(shell \ awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ - include/generated/asm-offsets.h)) + $(objtree)/include/generated/asm-offsets.h)) endif -# Ensure that if the compiler supports branch protection we default it -# off, this will be overridden if we are using branch protection. -branch-prot-flags-y += $(call cc-option,-mbranch-protection=none) - -ifeq ($(CONFIG_ARM64_PTR_AUTH),y) -branch-prot-flags-$(CONFIG_CC_HAS_SIGN_RETURN_ADDRESS) := -msign-return-address=all -# We enable additional protection for leaf functions as there is some -# narrow potential for ROP protection benefits and no substantial -# performance impact has been observed. ifeq ($(CONFIG_ARM64_BTI_KERNEL),y) -branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET_BTI) := -mbranch-protection=pac-ret+leaf+bti + KBUILD_CFLAGS += -mbranch-protection=pac-ret+bti + KBUILD_RUSTFLAGS += -Zbranch-protection=bti,pac-ret +else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y) + KBUILD_RUSTFLAGS += -Zbranch-protection=pac-ret + ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y) + KBUILD_CFLAGS += -mbranch-protection=pac-ret + else + KBUILD_CFLAGS += -msign-return-address=non-leaf + endif else -branch-prot-flags-$(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET) := -mbranch-protection=pac-ret+leaf + KBUILD_CFLAGS += $(call cc-option,-mbranch-protection=none) endif -# -march=armv8.3-a enables the non-nops instructions for PAC, to avoid the -# compiler to generate them and consequently to break the single image contract -# we pass it only to the assembler. This option is utilized only in case of non -# integrated assemblers. -branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a + +# Tell the assembler to support instructions from the latest target +# architecture. +# +# For non-integrated assemblers we'll pass this on the command line, and for +# integrated assemblers we'll define ARM64_ASM_ARCH and ARM64_ASM_PREAMBLE for +# inline usage. +# +# We cannot pass the same arch flag to the compiler as this would allow it to +# freely generate instructions which are not supported by earlier architecture +# versions, which would prevent a single kernel image from working on earlier +# hardware. +ifeq ($(CONFIG_AS_HAS_ARMV8_5), y) + asm-arch := armv8.5-a +else + asm-arch := armv8.4-a endif -KBUILD_CFLAGS += $(branch-prot-flags-y) +ifdef asm-arch +KBUILD_CFLAGS += -Wa,-march=$(asm-arch) \ + -DARM64_ASM_ARCH='"$(asm-arch)"' +endif ifeq ($(CONFIG_SHADOW_CALL_STACK), y) KBUILD_CFLAGS += -ffixed-x18 +KBUILD_RUSTFLAGS += -Zfixed-x18 endif ifeq ($(CONFIG_CPU_BIG_ENDIAN), y) @@ -96,42 +121,33 @@ KBUILD_CPPFLAGS += -mbig-endian CHECKFLAGS += -D__AARCH64EB__ # Prefer the baremetal ELF build target, but not all toolchains include # it so fall back to the standard linux version if needed. -KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb) +KBUILD_LDFLAGS += -EB $(call ld-option, -maarch64elfb, -maarch64linuxb -z norelro) UTS_MACHINE := aarch64_be else KBUILD_CPPFLAGS += -mlittle-endian CHECKFLAGS += -D__AARCH64EL__ # Same as above, prefer ELF but fall back to linux target if needed. -KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux) +KBUILD_LDFLAGS += -EL $(call ld-option, -maarch64elf, -maarch64linux -z norelro) UTS_MACHINE := aarch64 endif -CHECKFLAGS += -D__aarch64__ - -ifeq ($(CONFIG_ARM64_MODULE_PLTS),y) -KBUILD_LDS_MODULE += $(srctree)/arch/arm64/kernel/module.lds +ifeq ($(CONFIG_LD_IS_LLD), y) +KBUILD_LDFLAGS += -z norelro endif -ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y) +CHECKFLAGS += -D__aarch64__ + +ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS),y) + KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY + CC_FLAGS_FTRACE := -fpatchable-function-entry=4,2 +else ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_ARGS),y) KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY CC_FLAGS_FTRACE := -fpatchable-function-entry=2 endif -# Default value -head-y := arch/arm64/kernel/head.o - -# The byte offset of the kernel image in RAM from the start of RAM. -ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y) -TEXT_OFFSET := $(shell awk "BEGIN {srand(); printf \"0x%06x\n\", \ - int(2 * 1024 * 1024 / (2 ^ $(CONFIG_ARM64_PAGE_SHIFT)) * \ - rand()) * (2 ^ $(CONFIG_ARM64_PAGE_SHIFT))}") -else -TEXT_OFFSET := 0x0 -endif - ifeq ($(CONFIG_KASAN_SW_TAGS), y) KASAN_SHADOW_SCALE_SHIFT := 4 -else +else ifeq ($(CONFIG_KASAN_GENERIC), y) KASAN_SHADOW_SCALE_SHIFT := 3 endif @@ -139,35 +155,45 @@ KBUILD_CFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) KBUILD_CPPFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) KBUILD_AFLAGS += -DKASAN_SHADOW_SCALE_SHIFT=$(KASAN_SHADOW_SCALE_SHIFT) -export TEXT_OFFSET - -core-y += arch/arm64/ libs-y := arch/arm64/lib/ $(libs-y) -core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a +libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a # Default target when executing plain make boot := arch/arm64/boot + +BOOT_TARGETS := Image vmlinuz.efi image.fit + +PHONY += $(BOOT_TARGETS) + +ifeq ($(CONFIG_EFI_ZBOOT),) KBUILD_IMAGE := $(boot)/Image.gz +else +KBUILD_IMAGE := $(boot)/vmlinuz.efi +endif -all: Image.gz +all: $(notdir $(KBUILD_IMAGE)) +image.fit: dtbs -Image: vmlinux +vmlinuz.efi image.fit: Image +$(BOOT_TARGETS): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ Image.%: Image $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ -zinstall install: - $(Q)$(MAKE) $(build)=$(boot) $@ +ifeq ($(CONFIG_COMPRESSED_INSTALL),y) + DEFAULT_KBUILD_IMAGE = $(KBUILD_IMAGE) +else + DEFAULT_KBUILD_IMAGE = $(boot)/Image +endif -PHONY += vdso_install -vdso_install: - $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@ +install: KBUILD_IMAGE := $(DEFAULT_KBUILD_IMAGE) +install zinstall: + $(call cmd,install) -# We use MRPROPER_FILES and CLEAN_FILES now -archclean: - $(Q)$(MAKE) $(clean)=$(boot) +archprepare: + $(Q)$(MAKE) $(build)=arch/arm64/tools kapi ifeq ($(KBUILD_EXTMOD),) # We need to generate vdso-offsets.h before compiling certain files in kernel/. @@ -178,16 +204,28 @@ ifeq ($(KBUILD_EXTMOD),) # this hack. prepare: vdso_prepare vdso_prepare: prepare0 - $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso include/generated/vdso-offsets.h - $(if $(CONFIG_COMPAT_VDSO),$(Q)$(MAKE) \ - $(build)=arch/arm64/kernel/vdso32 \ - include/generated/vdso32-offsets.h) + $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso \ + include/generated/vdso-offsets.h arch/arm64/kernel/vdso/vdso.so +ifdef CONFIG_COMPAT_VDSO + $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 \ + arch/arm64/kernel/vdso32/vdso.so +endif endif +vdso-install-y += arch/arm64/kernel/vdso/vdso.so.dbg +vdso-install-$(CONFIG_COMPAT_VDSO) += arch/arm64/kernel/vdso32/vdso32.so.dbg + +include $(srctree)/scripts/Makefile.defconf + +PHONY += virtconfig +virtconfig: + $(call merge_into_defconfig_override,defconfig,virt) + define archhelp echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)' echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)' - echo ' install - Install uncompressed kernel' + echo ' image.fit - Flat Image Tree (arch/$(ARCH)/boot/image.fit)' + echo ' install - Install kernel (compressed if COMPRESSED_INSTALL set)' echo ' zinstall - Install compressed kernel' echo ' Install using (your) ~/bin/installkernel or' echo ' (distribution) /sbin/installkernel or' |