diff options
Diffstat (limited to 'arch/arm64/Makefile')
| -rw-r--r-- | arch/arm64/Makefile | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile new file mode 100644 index 000000000..6b005c8fe --- /dev/null +++ b/arch/arm64/Makefile @@ -0,0 +1,236 @@ +# +# arch/arm64/Makefile +# +# This file is included by the global makefile so that you can add your own +# architecture-specific flags and dependencies. +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 1995-2001 by Russell King + +LDFLAGS_vmlinux :=--no-undefined -X --pic-veneer + +ifeq ($(CONFIG_RELOCATABLE), y) +# Pass --no-apply-dynamic-relocs to restore pre-binutils-2.27 behaviour +# for relative relocs, since this leads to better Image compression +# with the relocation offsets always being zero. +LDFLAGS_vmlinux += -shared -Bsymbolic -z notext --no-apply-dynamic-relocs +endif + +ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) +LDFLAGS_vmlinux += --fix-cortex-a53-843419 +endif + +cc_has_k_constraint := $(call try-run,echo \ + 'int main(void) { \ + asm volatile("and w0, w0, %w0" :: "K" (4294967295)); \ + return 0; \ + }' | $(CC) -S -x c -o "$$TMP" -,,-DCONFIG_CC_HAS_K_CONSTRAINT=1) + +ifeq ($(CONFIG_BROKEN_GAS_INST),y) +$(warning Detected assembler with broken .inst; disassembly will be unreliable) +endif + +# The GCC option -ffreestanding is required in order to compile code containing +# ARM/NEON intrinsics in a non C99-compliant environment (such as the kernel) +CC_FLAGS_FPU := -ffreestanding +# Enable <arm_neon.h> +CC_FLAGS_FPU += -isystem $(shell $(CC) -print-file-name=include) +CC_FLAGS_NO_FPU := -mgeneral-regs-only + +KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) \ + $(compat_vdso) $(cc_has_k_constraint) +KBUILD_CFLAGS += $(call cc-disable-warning, psabi) +KBUILD_AFLAGS += $(compat_vdso) + +ifeq ($(call rustc-min-version, 108500),y) +KBUILD_RUSTFLAGS += --target=aarch64-unknown-none-softfloat +else +KBUILD_RUSTFLAGS += --target=aarch64-unknown-none -Ctarget-feature="-neon" +endif + +KBUILD_CFLAGS += $(call cc-option,-mabi=lp64) +KBUILD_AFLAGS += $(call cc-option,-mabi=lp64) + +# Avoid generating .eh_frame* sections. +ifneq ($(CONFIG_UNWIND_TABLES),y) +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables +KBUILD_AFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables +KBUILD_RUSTFLAGS += -Cforce-unwind-tables=n +else +KBUILD_CFLAGS += -fasynchronous-unwind-tables +KBUILD_AFLAGS += -fasynchronous-unwind-tables +KBUILD_RUSTFLAGS += -Cforce-unwind-tables=y -Zuse-sync-unwind=n +# Work around rustc bug on compilers without +# https://github.com/rust-lang/rust/pull/156973. +KBUILD_RUSTFLAGS += $(if $(call rustc-min-version,109800),,-Zllvm_module_flag=uwtable:u32:2:max) +endif + +ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y) +prepare: stack_protector_prepare +stack_protector_prepare: prepare0 + $(eval KBUILD_CFLAGS += -mstack-protector-guard=sysreg \ + -mstack-protector-guard-reg=sp_el0 \ + -mstack-protector-guard-offset=$(shell \ + awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}' \ + $(objtree)/include/generated/asm-offsets.h)) +endif + +ifeq ($(CONFIG_ARM64_BTI_KERNEL),y) + 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 + KBUILD_CFLAGS += $(call cc-option,-mbranch-protection=none) +endif + +# 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 + +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) +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 -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 -z norelro) +UTS_MACHINE := aarch64 +endif + +ifeq ($(CONFIG_LD_IS_LLD), y) +KBUILD_LDFLAGS += -z norelro +endif + +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 + +ifeq ($(CONFIG_KASAN_SW_TAGS), y) +KASAN_SHADOW_SCALE_SHIFT := 4 +else ifeq ($(CONFIG_KASAN_GENERIC), y) +KASAN_SHADOW_SCALE_SHIFT := 3 +endif + +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) + +libs-y := arch/arm64/lib/ $(libs-y) +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: $(notdir $(KBUILD_IMAGE)) + +image.fit: dtbs + +vmlinuz.efi image.fit: Image +$(BOOT_TARGETS): vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +Image.%: Image + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + +ifeq ($(CONFIG_COMPRESSED_INSTALL),y) + DEFAULT_KBUILD_IMAGE = $(KBUILD_IMAGE) +else + DEFAULT_KBUILD_IMAGE = $(boot)/Image +endif + +install: KBUILD_IMAGE := $(DEFAULT_KBUILD_IMAGE) +install zinstall: + $(call cmd,install) + +archprepare: + $(Q)$(MAKE) $(build)=arch/arm64/tools kapi + +ifeq ($(KBUILD_EXTMOD),) +# We need to generate vdso-offsets.h before compiling certain files in kernel/. +# In order to do that, we should use the archprepare target, but we can't since +# asm-offsets.h is included in some files used to generate vdso-offsets.h, and +# asm-offsets.h is built in prepare0, for which archprepare is a dependency. +# Therefore we need to generate the header after prepare0 has been made, hence +# this hack. +prepare: vdso_prepare +vdso_prepare: prepare0 + $(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 ' 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' + echo ' install to $$(INSTALL_PATH) and run lilo' +endef |