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56769ba4b2
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>
204 lines
6.0 KiB
Makefile
204 lines
6.0 KiB
Makefile
#
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# parisc/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies.
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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# Portions Copyright (C) 1999 The Puffin Group
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#
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# Modified for PA-RISC Linux by Paul Lahaie, Alex deVries,
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# Mike Shaver, Helge Deller and Martin K. Petersen
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#
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boot := arch/parisc/boot
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KBUILD_IMAGE := $(boot)/bzImage
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CHECKFLAGS += -D__hppa__=1
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ifdef CONFIG_64BIT
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UTS_MACHINE := parisc64
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CHECKFLAGS += -D__LP64__=1
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LD_BFD := elf64-hppa-linux
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else # 32-bit
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LD_BFD := elf32-hppa-linux
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endif
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# select defconfig based on actual architecture
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ifeq ($(ARCH),parisc64)
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KBUILD_DEFCONFIG := generic-64bit_defconfig
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CC_ARCHES := hppa64
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else
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KBUILD_DEFCONFIG := generic-32bit_defconfig
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CC_ARCHES := hppa hppa2.0 hppa1.1
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endif
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export LD_BFD
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# Set default 32 bits cross compilers for vdso
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CC_ARCHES_32 = hppa hppa2.0 hppa1.1
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CC_SUFFIXES = linux linux-gnu unknown-linux-gnu suse-linux
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CROSS32_COMPILE := $(call cc-cross-prefix, \
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$(foreach a,$(CC_ARCHES_32), \
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$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
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CROSS32CC := $(CROSS32_COMPILE)gcc
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export CROSS32CC
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# Set default cross compiler for kernel build
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ifdef cross_compiling
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ifeq ($(CROSS_COMPILE),)
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CC_SUFFIXES = linux linux-gnu unknown-linux-gnu suse-linux
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CROSS_COMPILE := $(call cc-cross-prefix, \
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$(foreach a,$(CC_ARCHES), \
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$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
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endif
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endif
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ifdef CONFIG_DYNAMIC_FTRACE
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ifdef CONFIG_64BIT
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NOP_COUNT := 8
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else
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NOP_COUNT := 5
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endif
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export CC_USING_RECORD_MCOUNT:=1
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export CC_USING_PATCHABLE_FUNCTION_ENTRY:=1
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KBUILD_AFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY=1
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KBUILD_CFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY=1 \
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-DFTRACE_PATCHABLE_FUNCTION_SIZE=$(NOP_COUNT)
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CC_FLAGS_FTRACE := -fpatchable-function-entry=$(NOP_COUNT),$(shell echo $$(($(NOP_COUNT)-1)))
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endif
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OBJCOPY_FLAGS =-O binary -R .note -R .comment -S
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cflags-y := -pipe
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# These flags should be implied by an hppa-linux configuration, but they
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# are not in gcc 3.2.
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cflags-y += -mno-space-regs
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# -mfast-indirect-calls is only relevant for 32-bit kernels.
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ifndef CONFIG_64BIT
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cflags-y += -mfast-indirect-calls
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endif
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# Currently we save and restore fpregs on all kernel entry/interruption paths.
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# If that gets optimized, we might need to disable the use of fpregs in the
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# kernel.
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cflags-y += -mdisable-fpregs
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# Use long jumps instead of long branches (needed if your linker fails to
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# link a too big vmlinux executable). Not enabled for building modules.
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ifdef CONFIG_MLONGCALLS
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KBUILD_CFLAGS_KERNEL += -mlong-calls
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endif
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# Without this, "ld -r" results in .text sections that are too big (> 0x40000)
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# for branches to reach stubs. And multiple .text sections trigger a warning
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# when creating the sysfs module information section.
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ifndef CONFIG_64BIT
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KBUILD_CFLAGS_MODULE += -ffunction-sections
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endif
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# select which processor to optimise for
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cflags-$(CONFIG_PA7000) += -march=1.1 -mschedule=7100
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cflags-$(CONFIG_PA7200) += -march=1.1 -mschedule=7200
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cflags-$(CONFIG_PA7100LC) += -march=1.1 -mschedule=7100LC
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cflags-$(CONFIG_PA7300LC) += -march=1.1 -mschedule=7300
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cflags-$(CONFIG_PA8X00) += -march=2.0 -mschedule=8000
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KBUILD_CFLAGS += $(cflags-y)
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LIBGCC := $(shell $(CC) -print-libgcc-file-name)
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export LIBGCC
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libs-y += arch/parisc/lib/ $(LIBGCC)
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drivers-y += arch/parisc/video/
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boot := arch/parisc/boot
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PALO := $(shell if (which palo 2>&1); then : ; \
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elif [ -x /sbin/palo ]; then echo /sbin/palo; \
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fi)
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PALOCONF := $(shell if [ -f $(srctree)/palo.conf ]; then echo $(srctree)/palo.conf; \
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else echo $(objtree)/palo.conf; \
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fi)
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palo lifimage: vmlinuz
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@if test ! -x "$(PALO)"; then \
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echo 'ERROR: Please install palo first (apt-get install palo)';\
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echo 'or build it from source and install it somewhere in your $$PATH';\
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false; \
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fi
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@if test ! -f "$(PALOCONF)"; then \
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cp $(srctree)/arch/parisc/defpalo.conf $(objtree)/palo.conf; \
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echo 'A generic palo config file ($(objree)/palo.conf) has been created for you.'; \
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echo 'You should check it and re-run "make palo".'; \
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echo 'WARNING: the "lifimage" file is now placed in this directory by default!'; \
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false; \
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fi
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$(PALO) -f $(PALOCONF)
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BOOT_TARGETS = zImage Image palo lifimage
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INSTALL_TARGETS = zinstall install
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PHONY += bzImage $(BOOT_TARGETS) $(INSTALL_TARGETS)
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# Default kernel to build
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all: bzImage
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zImage: vmlinuz
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Image: vmlinux
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bzImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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vmlinuz: bzImage
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$(OBJCOPY) $(boot)/bzImage $@
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ifeq ($(KBUILD_EXTMOD),)
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# We need to generate vdso-offsets.h before compiling certain files in kernel/.
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# In order to do that, we should use the archprepare target, but we can't since
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# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
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# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
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# Therefore we need to generate the header after prepare0 has been made, hence
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# this hack.
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prepare: vdso_prepare
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vdso_prepare: prepare0
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$(if $(CONFIG_64BIT),$(Q)$(MAKE) \
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$(build)=arch/parisc/kernel/vdso64 include/generated/vdso64-offsets.h)
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$(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso32 include/generated/vdso32-offsets.h
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endif
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vdso-install-y += arch/parisc/kernel/vdso32/vdso32.so
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vdso-install-$(CONFIG_64BIT) += arch/parisc/kernel/vdso64/vdso64.so
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install: KBUILD_IMAGE := vmlinux
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zinstall: KBUILD_IMAGE := vmlinuz
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install zinstall:
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$(call cmd,install)
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CLEAN_FILES += lifimage
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MRPROPER_FILES += palo.conf
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define archhelp
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@echo '* vmlinux - Uncompressed kernel image (./vmlinux)'
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@echo ' vmlinuz - Compressed kernel image (./vmlinuz)'
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@echo ' palo - Bootable image (./lifimage)'
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@echo ' install - Install uncompressed vmlinux kernel using'
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@echo ' (your) ~/bin/$(INSTALLKERNEL) or'
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@echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
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@echo ' copy to $$(INSTALL_PATH)'
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@echo ' zinstall - Install compressed vmlinuz kernel'
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endef
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archheaders:
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$(Q)$(MAKE) $(build)=arch/parisc/kernel/syscalls all
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