@@ -1317,6 +1317,14 @@ scripts_unifdef: scripts_basic
quiet_cmd_install = INSTALL $(INSTALL_PATH)
cmd_install = unset sub_make_done; $(srctree)/scripts/install.sh
+# ---------------------------------------------------------------------------
+# vDSO install
+
+PHONY += vdso_install
+vdso_install: export INSTALL_FILES = $(vdso-install-y)
+vdso_install:
+ $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vdsoinst
+
# ---------------------------------------------------------------------------
# Tools
@@ -1560,6 +1568,7 @@ help:
@echo '* vmlinux - Build the bare kernel'
@echo '* modules - Build all modules'
@echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
+ @echo ' vdso_install - Install unstripped vdso to INSTALL_MOD_PATH (default: /)'
@echo ' dir/ - Build all files in dir and below'
@echo ' dir/file.[ois] - Build specified target only'
@echo ' dir/file.ll - Build the LLVM assembly file'
@@ -304,11 +304,7 @@ $(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
$(INSTALL_TARGETS):
$(call cmd,install)
-PHONY += vdso_install
-vdso_install:
-ifeq ($(CONFIG_VDSO),y)
- $(Q)$(MAKE) $(build)=arch/arm/vdso $@
-endif
+vdso-install-$(CONFIG_VDSO) += arch/arm/vdso/vdso.so.dbg
# My testing targets (bypasses dependencies)
bp:; $(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
@@ -331,7 +327,6 @@ define archhelp
echo ' Install using (your) ~/bin/$(INSTALLKERNEL) or'
echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
echo ' install to $$(INSTALL_PATH) and run lilo'
- echo ' vdso_install - Install unstripped vdso.so to $$(INSTALL_MOD_PATH)/vdso'
echo
echo ' multi_v7_lpae_defconfig - multi_v7_defconfig with CONFIG_ARM_LPAE enabled'
endef
@@ -63,28 +63,3 @@ quiet_cmd_vdsold_and_vdso_check = LD $@
quiet_cmd_vdsomunge = MUNGE $@
cmd_vdsomunge = $(objtree)/$(obj)/vdsomunge $< $@
-
-#
-# Install the unstripped copy of vdso.so.dbg. If our toolchain
-# supports build-id, install .build-id links as well.
-#
-# Cribbed from arch/x86/vdso/Makefile.
-#
-quiet_cmd_vdso_install = INSTALL $<
-define cmd_vdso_install
- cp $< "$(MODLIB)/vdso/vdso.so"; \
- if readelf -n $< | grep -q 'Build ID'; then \
- buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
- first=`echo $$buildid | cut -b-2`; \
- last=`echo $$buildid | cut -b3-`; \
- mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
- ln -sf "../../vdso.so" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
- fi
-endef
-
-$(MODLIB)/vdso: FORCE
- @mkdir -p $(MODLIB)/vdso
-
-PHONY += vdso_install
-vdso_install: $(obj)/vdso.so.dbg $(MODLIB)/vdso
- $(call cmd,vdso_install)
@@ -169,12 +169,6 @@ install: KBUILD_IMAGE := $(boot)/Image
install zinstall:
$(call cmd,install)
-PHONY += vdso_install
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
- $(if $(CONFIG_COMPAT_VDSO), \
- $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@)
-
archprepare:
$(Q)$(MAKE) $(build)=arch/arm64/tools kapi
ifeq ($(CONFIG_ARM64_ERRATUM_843419),y)
@@ -205,6 +199,9 @@ ifdef CONFIG_COMPAT_VDSO
endif
endif
+vdso-install-y += arch/arm64/kernel/vdso/vdso.so.dbg
+vdso-install-$(CONFIG_COMPAT_VDSO) += arch/arm64/kernel/vdso32/vdso.so.dbg:vdso32.so
+
include $(srctree)/scripts/Makefile.defconf
PHONY += virtconfig
@@ -78,13 +78,3 @@ include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE
# Actual build commands
quiet_cmd_vdsold_and_vdso_check = LD $@
cmd_vdsold_and_vdso_check = $(cmd_ld); $(cmd_vdso_check)
-
-# Install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso.so: $(obj)/vdso.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso.so
@@ -172,13 +172,3 @@ gen-vdsosym := $(srctree)/$(src)/../vdso/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
# The AArch64 nm should be able to read an AArch32 binary
cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
-
-# Install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL32 $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/vdso32.so
-
-vdso.so: $(obj)/vdso.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso.so
@@ -136,9 +136,7 @@ vdso_prepare: prepare0
$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
endif
-PHONY += vdso_install
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
+vdso-install-y += arch/loongarch/vdso/vdso.so.dbg
all: $(notdir $(KBUILD_IMAGE))
@@ -83,13 +83,3 @@ $(obj)/vdso.so: $(obj)/vdso.so.dbg FORCE
obj-y += vdso.o
$(obj)/vdso.o : $(obj)/vdso.so
-
-# install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso.so: $(obj)/vdso.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso.so
@@ -177,12 +177,8 @@ vdso_prepare: prepare0
$(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso32 include/generated/vdso32-offsets.h
endif
-PHONY += vdso_install
-
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso $@
- $(if $(CONFIG_COMPAT_VDSO), \
- $(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso32 $@)
+vdso-install-y += arch/parisc/kernel/vdso32/vdso32.so
+vdso-install-$(CONFIG_64BIT) += arch/parisc/kernel/vdso64/vdso64.so
install: KBUILD_IMAGE := vmlinux
zinstall: KBUILD_IMAGE := vmlinuz
@@ -131,12 +131,6 @@ endif
libs-y += arch/riscv/lib/
libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
-PHONY += vdso_install
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
- $(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
- $(build)=arch/riscv/kernel/compat_vdso compat_$@)
-
ifeq ($(KBUILD_EXTMOD),)
ifeq ($(CONFIG_MMU),y)
prepare: vdso_prepare
@@ -148,6 +142,9 @@ vdso_prepare: prepare0
endif
endif
+vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
+vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg:../compat_vdso/compat_vdso.so
+
ifneq ($(CONFIG_XIP_KERNEL),y)
ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_ARCH_CANAAN),yy)
KBUILD_IMAGE := $(boot)/loader.bin
@@ -76,13 +76,3 @@ quiet_cmd_compat_vdsold = VDSOLD $@
# actual build commands
quiet_cmd_compat_vdsoas = VDSOAS $@
cmd_compat_vdsoas = $(COMPAT_CC) $(a_flags) $(COMPAT_CC_FLAGS) -c -o $@ $<
-
-# install commands for the unstripped file
-quiet_cmd_compat_vdso_install = INSTALL $@
- cmd_compat_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/compat_vdso/$@
-
-compat_vdso.so: $(obj)/compat_vdso.so.dbg
- @mkdir -p $(MODLIB)/compat_vdso
- $(call cmd,compat_vdso_install)
-
-compat_vdso_install: compat_vdso.so
@@ -73,13 +73,3 @@ quiet_cmd_vdsold = VDSOLD $@
cmd_vdsold = $(LD) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \
$(OBJCOPY) $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \
rm $@.tmp
-
-# install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso.so: $(obj)/vdso.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso.so
@@ -138,9 +138,6 @@ bzImage: vmlinux
zfcpdump:
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
-
archheaders:
$(Q)$(MAKE) $(build)=$(syscalls) uapi
@@ -160,6 +157,9 @@ vdso_prepare: prepare0
$(if $(CONFIG_COMPAT),$(Q)$(MAKE) \
$(build)=arch/s390/kernel/vdso32 include/generated/vdso32-offsets.h)
+vdso-install-y += arch/s390/kernel/vdso64/vdso64.so.dbg
+vdso-install-$(CONFIG_COMPAT) += arch/s390/kernel/vdso32/vdso32.so.dbg
+
ifdef CONFIG_EXPOLINE_EXTERN
modules_prepare: expoline_prepare
expoline_prepare: scripts
@@ -61,16 +61,6 @@ quiet_cmd_vdso32as = VDSO32A $@
quiet_cmd_vdso32cc = VDSO32C $@
cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $<
-# install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso32.so: $(obj)/vdso32.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso32.so
-
# Generate VDSO offsets using helper script
gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
@@ -70,16 +70,6 @@ quiet_cmd_vdso64as = VDSO64A $@
quiet_cmd_vdso64cc = VDSO64C $@
cmd_vdso64cc = $(CC) $(c_flags) -c -o $@ $<
-# install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
- cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-
-vdso64.so: $(obj)/vdso64.so.dbg
- @mkdir -p $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-vdso_install: vdso64.so
-
# Generate VDSO offsets using helper script
gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
@@ -76,9 +76,8 @@ install:
archheaders:
$(Q)$(MAKE) $(build)=arch/sparc/kernel/syscalls all
-PHONY += vdso_install
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/sparc/vdso $@
+vdso-install-$(CONFIG_SPARC64) += arch/sparc/vdso/vdso64.so.dbg
+vdso-install-$(CONFIG_COMPAT) += arch/sparc/vdso/vdso32.so.dbg
# This is the image used for packaging
KBUILD_IMAGE := $(boot)/zImage
@@ -116,30 +116,3 @@ quiet_cmd_vdso = VDSO $@
VDSO_LDFLAGS = -shared --hash-style=both --build-id=sha1 -Bsymbolic
GCOV_PROFILE := n
-
-#
-# Install the unstripped copies of vdso*.so. If our toolchain supports
-# build-id, install .build-id links as well.
-#
-quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
-define cmd_vdso_install
- cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
- if readelf -n $< |grep -q 'Build ID'; then \
- buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
- first=`echo $$buildid | cut -b-2`; \
- last=`echo $$buildid | cut -b3-`; \
- mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
- ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
- fi
-endef
-
-vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
-
-$(MODLIB)/vdso: FORCE
- @mkdir -p $(MODLIB)/vdso
-
-$(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso FORCE
- $(call cmd,vdso_install)
-
-PHONY += vdso_install $(vdso_img_insttargets)
-vdso_install: $(vdso_img_insttargets) FORCE
@@ -291,9 +291,10 @@ PHONY += install
install:
$(call cmd,install)
-PHONY += vdso_install
-vdso_install:
- $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
+vdso-install-$(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
archprepare: checkbin
checkbin:
@@ -190,31 +190,4 @@ GCOV_PROFILE := n
quiet_cmd_vdso_and_check = VDSO $@
cmd_vdso_and_check = $(cmd_vdso); $(cmd_vdso_check)
-#
-# Install the unstripped copies of vdso*.so. If our toolchain supports
-# build-id, install .build-id links as well.
-#
-quiet_cmd_vdso_install = INSTALL $(@:install_%=%)
-define cmd_vdso_install
- cp $< "$(MODLIB)/vdso/$(@:install_%=%)"; \
- if readelf -n $< |grep -q 'Build ID'; then \
- buildid=`readelf -n $< |grep 'Build ID' |sed -e 's/^.*Build ID: \(.*\)$$/\1/'`; \
- first=`echo $$buildid | cut -b-2`; \
- last=`echo $$buildid | cut -b3-`; \
- mkdir -p "$(MODLIB)/vdso/.build-id/$$first"; \
- ln -sf "../../$(@:install_%=%)" "$(MODLIB)/vdso/.build-id/$$first/$$last.debug"; \
- fi
-endef
-
-vdso_img_insttargets := $(vdso_img_sodbg:%.dbg=install_%)
-
-$(MODLIB)/vdso: FORCE
- @mkdir -p $(MODLIB)/vdso
-
-$(vdso_img_insttargets): install_%: $(obj)/%.dbg $(MODLIB)/vdso
- $(call cmd,vdso_install)
-
-PHONY += vdso_install $(vdso_img_insttargets)
-vdso_install: $(vdso_img_insttargets)
-
clean-files := vdso32.so vdso32.so.dbg vdso64* vdso-image-*.c vdsox32.so*
new file mode 100644
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# ==========================================================================
+# Install unstripped copies of vDSO
+# ==========================================================================
+
+PHONY := __default
+__default:
+ @:
+
+include $(srctree)/scripts/Kbuild.include
+
+install-dir := $(MODLIB)/vdso
+
+define gen_install_rules
+
+src := $$(firstword $$(subst :,$(space),$(1)))
+dest := $(install-dir)/$$(or $$(word 2,$$(subst :,$(space),$(1))),$$(patsubst %.dbg,%,$$(notdir $(1))))
+
+__default: $$(dest)
+$$(dest): $$(src) FORCE
+ $$(call cmd,install)
+
+# Some architectures create .build-id symlinks
+ifneq ($(filter arm sparc x86, $(SRCARCH)),)
+link := $(install-dir)/.build-id/$$(shell $(READELF) -n $$(src) | sed -n 's@^.*Build ID: \(..\)\(.*\)@\1/\2@p')
+
+__default: $$(link)
+$$(link): $$(dest) FORCE
+ $$(call cmd,symlink)
+endif
+
+endef
+
+$(foreach x, $(sort $(INSTALL_FILES)), $(eval $(call gen_install_rules,$(x))))
+
+quiet_cmd_install = INSTALL $@
+ cmd_install = mkdir -p $(dir $@); cp $< $@
+
+quiet_cmd_symlink = SYMLINK $@
+ cmd_symlink = mkdir -p $(dir $@); ln -sf --relative $< $@
+
+PHONY += FORCE
+FORCE:
+
+.PHONY: $(PHONY)
Currently, there is no standard implementation for vdso_install, leading to various issues: 1. Code duplication Many architectures duplicate similar code just for copying files to the install destination. Some architectures (arm, sparc, x86) create build-id symlinks, introducing more code duplication. 2. Unintended updates of in-tree build artifacts The vdso_install rule depends on the vdso files to install. It may update in-tree build artifacts. This can be problematic, as explained in commit 19514fc665ff ("arm, kbuild: make "make install" not depend on vmlinux"). 3. Broken code in some architectures Makefile code is often copied from one architecture to another without proper adaptation. 'make vdso_install' for parisc does not work. 'make vdso_install' for s390 installs vdso64, but not vdso32. To address these problems, this commit introduces a generic vdso_install rule. Architectures that support vdso_install need to define vdso-install-y in arch/*/Makefile. vdso-install-y lists the files to install. For example, arch/x86/Makefile looks like this: vdso-install-$(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 --- Changes in v2: - Add vdso-install-y for parisc Makefile | 9 ++++++ arch/arm/Makefile | 7 +--- arch/arm/vdso/Makefile | 25 -------------- arch/arm64/Makefile | 9 ++---- arch/arm64/kernel/vdso/Makefile | 10 ------ arch/arm64/kernel/vdso32/Makefile | 10 ------ arch/loongarch/Makefile | 4 +-- arch/loongarch/vdso/Makefile | 10 ------ arch/parisc/Makefile | 8 ++--- arch/riscv/Makefile | 9 ++---- arch/riscv/kernel/compat_vdso/Makefile | 10 ------ arch/riscv/kernel/vdso/Makefile | 10 ------ arch/s390/Makefile | 6 ++-- arch/s390/kernel/vdso32/Makefile | 10 ------ arch/s390/kernel/vdso64/Makefile | 10 ------ arch/sparc/Makefile | 5 ++- arch/sparc/vdso/Makefile | 27 ---------------- arch/x86/Makefile | 7 ++-- arch/x86/entry/vdso/Makefile | 27 ---------------- scripts/Makefile.vdsoinst | 45 ++++++++++++++++++++++++++ 20 files changed, 73 insertions(+), 185 deletions(-) create mode 100644 scripts/Makefile.vdsoinst