forked from Minki/linux
1a381d4a0a
Linking the ARM64 defconfig kernel with LLVM lld fails with the error: ld.lld: error: unknown argument: -p Makefile:1015: recipe for target 'vmlinux' failed Without this flag, the ARM64 defconfig kernel successfully links with lld and boots on Dragonboard 410c. After digging through binutils source and changelogs, it turns out that -p is only relevant to ancient binutils installations targeting 32-bit ARM. binutils accepts -p for AArch64 too, but it's always been undocumented and silently ignored. A comment in ld/emultempl/aarch64elf.em explains that it's "Only here for backwards compatibility". Since this flag is a no-op on ARM64, we can safely drop it. Acked-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Greg Hackmann <ghackmann@google.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
168 lines
5.2 KiB
Makefile
168 lines
5.2 KiB
Makefile
#
|
|
# 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
|
|
CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
|
|
GZFLAGS :=-9
|
|
|
|
ifeq ($(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 += -pie -shared -Bsymbolic \
|
|
$(call ld-option, --no-apply-dynamic-relocs)
|
|
endif
|
|
|
|
ifeq ($(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
|
|
|
|
KBUILD_DEFCONFIG := defconfig
|
|
|
|
# Check for binutils support for specific extensions
|
|
lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
|
|
|
|
ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
|
|
ifeq ($(lseinstr),)
|
|
$(warning LSE atomics not supported by binutils)
|
|
endif
|
|
endif
|
|
|
|
ifeq ($(CONFIG_ARM64), y)
|
|
brokengasinst := $(call as-instr,1:\n.inst 0\n.rept . - 1b\n\nnop\n.endr\n,,-DCONFIG_BROKEN_GAS_INST=1)
|
|
|
|
ifneq ($(brokengasinst),)
|
|
$(warning Detected assembler with broken .inst; disassembly will be unreliable)
|
|
endif
|
|
endif
|
|
|
|
KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst)
|
|
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
|
|
KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
|
|
|
|
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
|
|
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
|
|
|
|
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
|
|
KBUILD_CPPFLAGS += -mbig-endian
|
|
CHECKFLAGS += -D__AARCH64EB__
|
|
AS += -EB
|
|
LDFLAGS += -EB -maarch64elfb
|
|
UTS_MACHINE := aarch64_be
|
|
else
|
|
KBUILD_CPPFLAGS += -mlittle-endian
|
|
CHECKFLAGS += -D__AARCH64EL__
|
|
AS += -EL
|
|
LDFLAGS += -EL -maarch64elf
|
|
UTS_MACHINE := aarch64
|
|
endif
|
|
|
|
CHECKFLAGS += -D__aarch64__
|
|
|
|
ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
|
|
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/arm64/kernel/module.lds
|
|
endif
|
|
|
|
# Default value
|
|
head-y := arch/arm64/kernel/head.o
|
|
|
|
# The byte offset of the kernel image in RAM from the start of RAM.
|
|
ifeq ($(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 := 0x00080000
|
|
endif
|
|
|
|
# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT))
|
|
# - (1 << (64 - KASAN_SHADOW_SCALE_SHIFT))
|
|
# in 32-bit arithmetic
|
|
KASAN_SHADOW_SCALE_SHIFT := 3
|
|
KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
|
|
(0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
|
|
+ (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) \
|
|
- (1 << (64 - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) )) )
|
|
|
|
export TEXT_OFFSET GZFLAGS
|
|
|
|
core-y += arch/arm64/kernel/ arch/arm64/mm/
|
|
core-$(CONFIG_NET) += arch/arm64/net/
|
|
core-$(CONFIG_KVM) += arch/arm64/kvm/
|
|
core-$(CONFIG_XEN) += arch/arm64/xen/
|
|
core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
|
|
libs-y := arch/arm64/lib/ $(libs-y)
|
|
core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
|
|
|
|
# Default target when executing plain make
|
|
boot := arch/arm64/boot
|
|
KBUILD_IMAGE := $(boot)/Image.gz
|
|
KBUILD_DTBS := dtbs
|
|
|
|
all: Image.gz $(KBUILD_DTBS)
|
|
|
|
|
|
Image: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
Image.%: Image
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
zinstall install:
|
|
$(Q)$(MAKE) $(build)=$(boot) $@
|
|
|
|
%.dtb: scripts
|
|
$(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
|
|
|
|
PHONY += dtbs dtbs_install
|
|
|
|
dtbs: prepare scripts
|
|
$(Q)$(MAKE) $(build)=$(boot)/dts
|
|
|
|
dtbs_install:
|
|
$(Q)$(MAKE) $(dtbinst)=$(boot)/dts
|
|
|
|
PHONY += vdso_install
|
|
vdso_install:
|
|
$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
|
|
|
|
# We use MRPROPER_FILES and CLEAN_FILES now
|
|
archclean:
|
|
$(Q)$(MAKE) $(clean)=$(boot)
|
|
$(Q)$(MAKE) $(clean)=$(boot)/dts
|
|
|
|
# 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
|
|
|
|
define archhelp
|
|
echo '* Image.gz - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
|
|
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
|
|
echo '* dtbs - Build device tree blobs for enabled boards'
|
|
echo ' dtbs_install - Install dtbs to $(INSTALL_DTBS_PATH)'
|
|
echo ' install - Install uncompressed kernel'
|
|
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
|