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linux/arch/arm/Makefile
Masahiro Yamada 56769ba4b2 kbuild: unify vdso_install rules 
Currently, there is no standard implementation for vdso_install,
leading to various issues:

 1. Code duplication

    Many architectures duplicate similar code just for copying files
    to the install destination.

    Some architectures (arm, sparc, x86) create build-id symlinks,
    introducing more code duplication.

 2. Unintended updates of in-tree build artifacts

    The vdso_install rule depends on the vdso files to install.
    It may update in-tree build artifacts. This can be problematic,
    as explained in commit 19514fc665 ("arm, kbuild: make
    "make install" not depend on vmlinux").

 3. Broken code in some architectures

    Makefile code is often copied from one architecture to another
    without proper adaptation.

    'make vdso_install' for parisc does not work.

    'make vdso_install' for s390 installs vdso64, but not vdso32.

To address these problems, this commit introduces a generic vdso_install
rule.

Architectures that support vdso_install need to define vdso-install-y
in arch/*/Makefile. vdso-install-y lists the files to install.

For example, arch/x86/Makefile looks like this:

  vdso-install-$(CONFIG_X86_64)           += arch/x86/entry/vdso/vdso64.so.dbg
  vdso-install-$(CONFIG_X86_X32_ABI)      += arch/x86/entry/vdso/vdsox32.so.dbg
  vdso-install-$(CONFIG_X86_32)           += arch/x86/entry/vdso/vdso32.so.dbg
  vdso-install-$(CONFIG_IA32_EMULATION)   += arch/x86/entry/vdso/vdso32.so.dbg

These files will be installed to $(MODLIB)/vdso/ with the .dbg suffix,
if exists, stripped away.

vdso-install-y can optionally take the second field after the colon
separator. This is needed because some architectures install a vdso
file as a different base name.

The following is a snippet from arch/arm64/Makefile.

  vdso-install-$(CONFIG_COMPAT_VDSO)      += arch/arm64/kernel/vdso32/vdso.so.dbg:vdso32.so

This will rename vdso.so.dbg to vdso32.so during installation. If such
architectures change their implementation so that the base names match,
this workaround will go away.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Sven Schnelle <svens@linux.ibm.com> # s390
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Reviewed-by: Guo Ren <guoren@kernel.org>
Acked-by: Helge Deller <deller@gmx.de>  # parisc
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
2023-10-28 21:09:02 +09:00

333 lines
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Makefile
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#
# arch/arm/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 -z norelro
ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
LDFLAGS_vmlinux += --be8
KBUILD_LDFLAGS_MODULE += --be8
endif
GZFLAGS :=-9
#KBUILD_CFLAGS +=-pipe
# Never generate .eh_frame
KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
# Disable FDPIC ABI
KBUILD_CFLAGS += $(call cc-option,-mno-fdpic)
# This should work on most of the modern platforms
KBUILD_DEFCONFIG := multi_v7_defconfig
# defines filename extension depending memory management type.
ifeq ($(CONFIG_MMU),)
MMUEXT := -nommu
KBUILD_CFLAGS += $(call cc-option,-mno-unaligned-access)
endif
ifeq ($(CONFIG_FRAME_POINTER),y)
KBUILD_CFLAGS +=-fno-omit-frame-pointer
ifeq ($(CONFIG_CC_IS_GCC),y)
KBUILD_CFLAGS += -mapcs -mno-sched-prolog
endif
endif
ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
KBUILD_CPPFLAGS += -mbig-endian
CHECKFLAGS += -D__ARMEB__
KBUILD_LDFLAGS += -EB
else
KBUILD_CPPFLAGS += -mlittle-endian
CHECKFLAGS += -D__ARMEL__
KBUILD_LDFLAGS += -EL
endif
#
# The Scalar Replacement of Aggregates (SRA) optimization pass in GCC 4.9 and
# later may result in code being generated that handles signed short and signed
# char struct members incorrectly. So disable it.
# (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65932)
#
KBUILD_CFLAGS += $(call cc-option,-fno-ipa-sra)
# This selects which instruction set is used.
arch-$(CONFIG_CPU_32v7M) :=-march=armv7-m
arch-$(CONFIG_CPU_32v7) :=-march=armv7-a
arch-$(CONFIG_CPU_32v6) :=-march=armv6
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7
ifeq ($(CONFIG_CPU_32v6),y)
arch-$(CONFIG_CPU_32v6K) :=-march=armv6k
endif
arch-$(CONFIG_CPU_32v5) :=-march=armv5te
arch-$(CONFIG_CPU_32v4T) :=-march=armv4t
arch-$(CONFIG_CPU_32v4) :=-march=armv4
arch-$(CONFIG_CPU_32v3) :=-march=armv3m
# Note that GCC does not numerically define an architecture version
# macro, but instead defines a whole series of macros which makes
# testing for a specific architecture or later rather impossible.
cpp-$(CONFIG_CPU_32v7M) :=-D__LINUX_ARM_ARCH__=7
cpp-$(CONFIG_CPU_32v7) :=-D__LINUX_ARM_ARCH__=7
cpp-$(CONFIG_CPU_32v6) :=-D__LINUX_ARM_ARCH__=6
# Only override the compiler option if ARMv6. The ARMv6K extensions are
# always available in ARMv7
ifeq ($(CONFIG_CPU_32v6),y)
cpp-$(CONFIG_CPU_32v6K) :=-D__LINUX_ARM_ARCH__=6
endif
cpp-$(CONFIG_CPU_32v5) :=-D__LINUX_ARM_ARCH__=5
cpp-$(CONFIG_CPU_32v4T) :=-D__LINUX_ARM_ARCH__=4
cpp-$(CONFIG_CPU_32v4) :=-D__LINUX_ARM_ARCH__=4
cpp-$(CONFIG_CPU_32v3) :=-D__LINUX_ARM_ARCH__=3
# This selects how we optimise for the processor.
tune-$(CONFIG_CPU_ARM7TDMI) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM720T) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM740T) :=-mtune=arm7tdmi
tune-$(CONFIG_CPU_ARM9TDMI) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM940T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM946E) :=-mtune=arm9e
tune-$(CONFIG_CPU_ARM920T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM922T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM925T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_ARM926T) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_FA526) :=-mtune=arm9tdmi
tune-$(CONFIG_CPU_SA110) :=-mtune=strongarm110
tune-$(CONFIG_CPU_SA1100) :=-mtune=strongarm1100
tune-$(CONFIG_CPU_XSCALE) :=-mtune=xscale
tune-$(CONFIG_CPU_XSC3) :=-mtune=xscale
tune-$(CONFIG_CPU_FEROCEON) :=-mtune=xscale
tune-$(CONFIG_CPU_V6) :=-mtune=arm1136j-s
tune-$(CONFIG_CPU_V6K) :=-mtune=arm1136j-s
ifeq ($(CONFIG_AEABI),y)
CFLAGS_ABI :=-mabi=aapcs-linux -mfpu=vfp
else
CFLAGS_ABI :=$(call cc-option,-mapcs-32,-mabi=apcs-gnu) $(call cc-option,-mno-thumb-interwork,)
endif
ifeq ($(CONFIG_ARM_UNWIND),y)
CFLAGS_ABI +=-funwind-tables
endif
ifeq ($(CONFIG_CC_IS_CLANG),y)
CFLAGS_ABI += -meabi gnu
endif
ifeq ($(CONFIG_CURRENT_POINTER_IN_TPIDRURO),y)
KBUILD_CFLAGS += -mtp=cp15
endif
# Accept old syntax despite ".syntax unified"
AFLAGS_NOWARN :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
ifeq ($(CONFIG_THUMB2_KERNEL),y)
CFLAGS_ISA :=-Wa,-mimplicit-it=always $(AFLAGS_NOWARN)
AFLAGS_ISA :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
CFLAGS_ISA +=-mthumb
else
CFLAGS_ISA :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
AFLAGS_ISA :=$(CFLAGS_ISA)
endif
# Need -Uarm for gcc < 3.x
KBUILD_CPPFLAGS +=$(cpp-y)
KBUILD_CFLAGS +=$(CFLAGS_ABI) $(CFLAGS_ISA) $(arch-y) $(tune-y) $(call cc-option,-mshort-load-bytes,$(call cc-option,-malignment-traps,)) -msoft-float -Uarm
KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) -Wa,$(arch-y) $(tune-y) -include asm/unified.h -msoft-float
CHECKFLAGS += -D__arm__
# Text offset. This list is sorted numerically by address in order to
# provide a means to avoid/resolve conflicts in multi-arch kernels.
# Note: the 32kB below this value is reserved for use by the kernel
# during boot, and this offset is critical to the functioning of
# kexec-tools.
textofs-y := 0x00008000
# RTD1195 has Boot ROM at start of address space
textofs-$(CONFIG_ARCH_REALTEK) := 0x00108000
# SA1111 DMA bug: we don't want the kernel to live in precious DMA-able memory
ifeq ($(CONFIG_ARCH_SA1100),y)
textofs-$(CONFIG_SA1111) := 0x00208000
endif
textofs-$(CONFIG_ARCH_IPQ40XX) := 0x00208000
textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
textofs-$(CONFIG_ARCH_MESON) := 0x00208000
textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
# Machine directory name. This list is sorted alphanumerically
# by CONFIG_* macro name.
machine-$(CONFIG_ARCH_ACTIONS) += actions
machine-$(CONFIG_ARCH_AIROHA) += airoha
machine-$(CONFIG_ARCH_ALPINE) += alpine
machine-$(CONFIG_ARCH_ARTPEC) += artpec
machine-$(CONFIG_ARCH_ASPEED) += aspeed
machine-$(CONFIG_ARCH_AT91) += at91
machine-$(CONFIG_ARCH_AXXIA) += axxia
machine-$(CONFIG_ARCH_BCM) += bcm
machine-$(CONFIG_ARCH_BERLIN) += berlin
machine-$(CONFIG_ARCH_CLPS711X) += clps711x
machine-$(CONFIG_ARCH_DAVINCI) += davinci
machine-$(CONFIG_ARCH_DIGICOLOR) += digicolor
machine-$(CONFIG_ARCH_DOVE) += dove
machine-$(CONFIG_ARCH_EP93XX) += ep93xx
machine-$(CONFIG_ARCH_EXYNOS) += exynos
machine-$(CONFIG_ARCH_FOOTBRIDGE) += footbridge
machine-$(CONFIG_ARCH_GEMINI) += gemini
machine-$(CONFIG_ARCH_HIGHBANK) += highbank
machine-$(CONFIG_ARCH_HISI) += hisi
machine-$(CONFIG_ARCH_HPE) += hpe
machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx
machine-$(CONFIG_ARCH_KEYSTONE) += keystone
machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx
machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx
machine-$(CONFIG_ARCH_MESON) += meson
machine-$(CONFIG_ARCH_MMP) += mmp
machine-$(CONFIG_ARCH_MOXART) += moxart
machine-$(CONFIG_ARCH_MV78XX0) += mv78xx0
machine-$(CONFIG_ARCH_MVEBU) += mvebu
machine-$(CONFIG_ARCH_MXC) += imx
machine-$(CONFIG_ARCH_MEDIATEK) += mediatek
machine-$(CONFIG_ARCH_MILBEAUT) += milbeaut
machine-$(CONFIG_ARCH_MXS) += mxs
machine-$(CONFIG_ARCH_MSTARV7) += mstar
machine-$(CONFIG_ARCH_NOMADIK) += nomadik
machine-$(CONFIG_ARCH_NPCM) += npcm
machine-$(CONFIG_ARCH_NSPIRE) += nspire
machine-$(CONFIG_ARCH_OMAP1) += omap1
machine-$(CONFIG_ARCH_OMAP2PLUS) += omap2
machine-$(CONFIG_ARCH_ORION5X) += orion5x
machine-$(CONFIG_ARCH_PXA) += pxa
machine-$(CONFIG_ARCH_QCOM) += qcom
machine-$(CONFIG_ARCH_REALTEK) += realtek
machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip
machine-$(CONFIG_ARCH_RPC) += rpc
machine-$(CONFIG_PLAT_SAMSUNG) += s3c
machine-$(CONFIG_ARCH_S5PV210) += s5pv210
machine-$(CONFIG_ARCH_SA1100) += sa1100
machine-$(CONFIG_ARCH_RENESAS) += shmobile
machine-$(CONFIG_ARCH_INTEL_SOCFPGA) += socfpga
machine-$(CONFIG_ARCH_STI) += sti
machine-$(CONFIG_ARCH_STM32) += stm32
machine-$(CONFIG_ARCH_SUNPLUS) += sunplus
machine-$(CONFIG_ARCH_SUNXI) += sunxi
machine-$(CONFIG_ARCH_TEGRA) += tegra
machine-$(CONFIG_ARCH_U8500) += ux500
machine-$(CONFIG_ARCH_VT8500) += vt8500
machine-$(CONFIG_ARCH_ZYNQ) += zynq
machine-$(CONFIG_PLAT_VERSATILE) += versatile
machine-$(CONFIG_PLAT_SPEAR) += spear
# legacy platforms provide their own mach/*.h headers globally,
# these three are mutually exclusive
machdirs-$(CONFIG_ARCH_FOOTBRIDGE) += arch/arm/mach-footbridge
machdirs-$(CONFIG_ARCH_RPC) += arch/arm/mach-rpc
machdirs-$(CONFIG_ARCH_SA1100) += arch/arm/mach-sa1100
KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
# The byte offset of the kernel image in RAM from the start of RAM.
TEXT_OFFSET := $(textofs-y)
export TEXT_OFFSET GZFLAGS MMUEXT
# If we have a machine-specific directory, then include it in the build.
core-y += $(patsubst %,arch/arm/mach-%/,$(machine-y))
# For cleaning
core- += $(patsubst %,arch/arm/mach-%/,$(machine-))
core-$(CONFIG_PLAT_ORION) += arch/arm/plat-orion/
libs-y := arch/arm/lib/ $(libs-y)
# Default target when executing plain make
boot := arch/arm/boot
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := $(boot)/xipImage
else
KBUILD_IMAGE := $(boot)/zImage
endif
ifeq ($(CONFIG_STACKPROTECTOR_PER_TASK),y)
prepare: stack_protector_prepare
ifeq ($(CONFIG_CC_HAVE_STACKPROTECTOR_TLS),y)
stack_protector_prepare: prepare0
$(eval KBUILD_CFLAGS += \
-mstack-protector-guard=tls \
-mstack-protector-guard-offset=$(shell \
awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
include/generated/asm-offsets.h))
else
stack_protector_prepare: prepare0
$(eval SSP_PLUGIN_CFLAGS := \
-fplugin-arg-arm_ssp_per_task_plugin-offset=$(shell \
awk '{if ($$2 == "TSK_STACK_CANARY") print $$3;}'\
include/generated/asm-offsets.h))
$(eval KBUILD_CFLAGS += $(SSP_PLUGIN_CFLAGS))
$(eval GCC_PLUGINS_CFLAGS += $(SSP_PLUGIN_CFLAGS))
endif
endif
all: $(notdir $(KBUILD_IMAGE))
archheaders:
$(Q)$(MAKE) $(build)=arch/arm/tools uapi
archprepare:
$(Q)$(MAKE) $(build)=arch/arm/tools kapi
# Convert bzImage to zImage
bzImage: zImage
BOOT_TARGETS = zImage Image xipImage bootpImage uImage
INSTALL_TARGETS = zinstall uinstall install
PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
bootpImage uImage: zImage
zImage: Image
$(BOOT_TARGETS): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
@$(kecho) ' Kernel: $(boot)/$@ is ready'
$(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
$(INSTALL_TARGETS):
$(call cmd,install)
vdso-install-$(CONFIG_VDSO) += arch/arm/vdso/vdso.so.dbg
# My testing targets (bypasses dependencies)
bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
include $(srctree)/scripts/Makefile.defconf
PHONY += multi_v7_lpae_defconfig
multi_v7_lpae_defconfig:
$(call merge_into_defconfig,multi_v7_defconfig,lpae)
define archhelp
echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
echo '* xipImage - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
echo ' uImage - U-Boot wrapped zImage'
echo ' bootpImage - Combined zImage and initial RAM disk'
echo ' (supply initrd image via make variable INITRD=<path>)'
echo ' install - Install uncompressed kernel'
echo ' zinstall - Install compressed kernel'
echo ' uinstall - Install U-Boot wrapped compressed kernel'
echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
echo ' install to $$(INSTALL_PATH) and run lilo'
echo
echo ' multi_v7_lpae_defconfig - multi_v7_defconfig with CONFIG_ARM_LPAE enabled'
endef
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