Merge tag 'kbuild-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

- Implement the binary search in modpost for faster symbol lookup

- Respect HOSTCC when linking host programs written in Rust

- Change the binrpm-pkg target to generate kernel-devel RPM package

- Fix endianness issues for tee and ishtp MODULE_DEVICE_TABLE

- Unify vdso_install rules

- Remove unused __memexit* annotations

- Eliminate stale whitelisting for __devinit/__devexit from modpost

- Enable dummy-tools to handle the -fpatchable-function-entry flag

- Add 'userldlibs' syntax

* tag 'kbuild-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
kbuild: support 'userldlibs' syntax
kbuild: dummy-tools: pretend we understand -fpatchable-function-entry
kbuild: Correct missing architecture-specific hyphens
modpost: squash ALL_{INIT,EXIT}_TEXT_SECTIONS to ALL_TEXT_SECTIONS
modpost: merge sectioncheck table entries regarding init/exit sections
modpost: use ALL_INIT_SECTIONS for the section check from DATA_SECTIONS
modpost: disallow the combination of EXPORT_SYMBOL and __meminit*
modpost: remove EXIT_SECTIONS macro
modpost: remove MEM_INIT_SECTIONS macro
modpost: remove more symbol patterns from the section check whitelist
modpost: disallow *driver to reference .meminit* sections
linux/init: remove __memexit* annotations
modpost: remove ALL_EXIT_DATA_SECTIONS macro
kbuild: simplify cmd_ld_multi_m
kbuild: avoid too many execution of scripts/pahole-flags.sh
kbuild: remove ARCH_POSTLINK from module builds
kbuild: unify no-compiler-targets and no-sync-config-targets
kbuild: unify vdso_install rules
docs: kbuild: add INSTALL_DTBS_PATH
UML: remove unused cmd_vdso_install
...

.gitignore

···
 #
 # RPM spec file (make rpm-pkg)
 #
-/kernel.spec
 /rpmbuild/
 
 #

Documentation/kbuild/kbuild.rst

···
 
 The value can be overridden in which case the default value is ignored.
 
+INSTALL_DTBS_PATH
+-----------------
+INSTALL_DTBS_PATH specifies where to install device tree blobs for
+relocations required by build roots.  This is not defined in the
+makefile but the argument can be passed to make if needed.
+
 KBUILD_ABS_SRCTREE
 --------------------------------------------------
 Kbuild uses a relative path to point to the tree when possible. For instance,

Documentation/kbuild/makefiles.rst

···
   # net/bpfilter/Makefile
   bpfilter_umh-userldflags += -static
 
+To specify libraries linked to a userspace program, you can use
+``<executable>-userldlibs``. The ``userldlibs`` syntax specifies libraries
+linked to all userspace programs created in the current Makefile.
+
 When linking bpfilter_umh, it will be passed the extra option -static.
 
 From command line, :ref:`USERCFLAGS and USERLDFLAGS <userkbuildflags>` will also be used.
···
   default option --strip-debug will be used.  Otherwise, the
   INSTALL_MOD_STRIP value will be used as the option(s) to the strip
   command.
+
+INSTALL_DTBS_PATH
+  This variable specifies a prefix for relocations required by build
+  roots. It defines a place for installing the device tree blobs. Like
+  INSTALL_MOD_PATH, it isn't defined in the Makefile, but can be passed
+  by the user if desired. Otherwise it defaults to the kernel install
+  path.
 
 Makefile language
 =================

MAINTAINERS

···
 F:	net/sched/cls_bpf.c
 F:	samples/bpf/
 F:	scripts/bpf_doc.py
-F:	scripts/pahole-flags.sh
+F:	scripts/Makefile.btf
 F:	scripts/pahole-version.sh
 F:	tools/bpf/
 F:	tools/lib/bpf/

Makefile

···
 			 $(version_h) headers headers_% archheaders archscripts \
 			 %asm-generic kernelversion %src-pkg dt_binding_check \
 			 outputmakefile rustavailable rustfmt rustfmtcheck
-# Installation targets should not require compiler. Unfortunately, vdso_install
-# is an exception where build artifacts may be updated. This must be fixed.
-no-compiler-targets := $(no-dot-config-targets) install dtbs_install \
-			headers_install modules_install modules_sign kernelrelease image_name
 no-sync-config-targets := $(no-dot-config-targets) %install modules_sign kernelrelease \
 			  image_name
 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.rsi %.s %.symtypes %/
···
 config-build	:=
 mixed-build	:=
 need-config	:= 1
-need-compiler	:= 1
 may-sync-config	:= 1
 single-build	:=
 
···
 	endif
 endif
 
-ifneq ($(filter $(no-compiler-targets), $(MAKECMDGOALS)),)
-	ifeq ($(filter-out $(no-compiler-targets), $(MAKECMDGOALS)),)
-		need-compiler :=
-	endif
-endif
-
 ifneq ($(filter $(no-sync-config-targets), $(MAKECMDGOALS)),)
 	ifeq ($(filter-out $(no-sync-config-targets), $(MAKECMDGOALS)),)
 		may-sync-config :=
 	endif
 endif
+
+need-compiler := $(may-sync-config)
 
 ifneq ($(KBUILD_EXTMOD),)
 	may-sync-config :=
···
 XZ		= xz
 ZSTD		= zstd
 
-PAHOLE_FLAGS	= $(shell PAHOLE=$(PAHOLE) $(srctree)/scripts/pahole-flags.sh)
-
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
 		  -Wbitwise -Wno-return-void -Wno-unknown-attribute $(CF)
 NOSTDINC_FLAGS :=
···
 export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
 export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_RUSTFLAGS_MODULE KBUILD_LDFLAGS_MODULE
 export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL KBUILD_RUSTFLAGS_KERNEL
-export PAHOLE_FLAGS
 
 # Files to ignore in find ... statements
 
···
 # *config targets only - make sure prerequisites are updated, and descend
 # in scripts/kconfig to make the *config target
 
-# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
+# Read arch-specific Makefile to set KBUILD_DEFCONFIG as needed.
 # KBUILD_DEFCONFIG may point out an alternative default configuration
 # used for 'make defconfig'
 include $(srctree)/arch/$(SRCARCH)/Makefile
···
 
 else #!config-build
 # ===========================================================================
-# Build targets only - this includes vmlinux, arch specific targets, clean
+# Build targets only - this includes vmlinux, arch-specific targets, clean
 # targets and others. In general all targets except *config targets.
 
 # If building an external module we do not care about the all: rule
···
 # include additional Makefiles when needed
 include-y			:= scripts/Makefile.extrawarn
 include-$(CONFIG_DEBUG_INFO)	+= scripts/Makefile.debug
+include-$(CONFIG_DEBUG_INFO_BTF)+= scripts/Makefile.btf
 include-$(CONFIG_KASAN)		+= scripts/Makefile.kasan
 include-$(CONFIG_KCSAN)		+= scripts/Makefile.kcsan
 include-$(CONFIG_KMSAN)		+= scripts/Makefile.kmsan
···
       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
 
 ifdef CONFIG_OBJTOOL
···
 		  certs/signing_key.pem \
 		  certs/x509.genkey \
 		  vmlinux-gdb.py \
-		  kernel.spec rpmbuild \
+		  rpmbuild \
 		  rust/libmacros.so
 
 # clean - Delete most, but leave enough to build external modules
···
 	@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'
···
 	@echo  'Documentation targets:'
 	@$(MAKE) -f $(srctree)/Documentation/Makefile dochelp
 	@echo  ''
-	@echo  'Architecture specific targets ($(SRCARCH)):'
+	@echo  'Architecture-specific targets ($(SRCARCH)):'
 	@$(or $(archhelp),\
-		echo '  No architecture specific help defined for $(SRCARCH)')
+		echo '  No architecture-specific help defined for $(SRCARCH)')
 	@echo  ''
 	@$(if $(boards), \
 		$(foreach b, $(boards), \
···
 boards-per-dir = $(sort $(notdir $(wildcard $(srctree)/arch/$(SRCARCH)/configs/$*/*_defconfig)))
 
 $(help-board-dirs): help-%:
-	@echo  'Architecture specific targets ($(SRCARCH) $*):'
+	@echo  'Architecture-specific targets ($(SRCARCH) $*):'
 	@$(if $(boards-per-dir), \
 		$(foreach b, $(boards-per-dir), \
 		printf "  %-24s - Build for %s\\n" $*/$(b) $(subst _defconfig,,$(b));) \

arch/arm/Makefile

···
 $(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) $(boot)/bootpImage
···
   echo  '                  Install using (your) ~/bin/$(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

arch/arm/vdso/Makefile

···
 
 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)

arch/arm64/Makefile

···
 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)
···
 	include/generated/vdso32-offsets.h 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/vdso.so.dbg:vdso32.so
 
 include $(srctree)/scripts/Makefile.defconf
 

arch/arm64/kernel/vdso/Makefile

···
 # 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

arch/arm64/kernel/vdso32/Makefile

···
 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

arch/csky/kernel/vdso/Makefile

···
 # that contains the same symbols at the same offsets.
 quiet_cmd_so2s = SO2S    $@
       cmd_so2s = $(NM) -D $< | $(srctree)/$(src)/so2s.sh > $@
-
-# 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

arch/loongarch/Makefile

···
 	$(Q)$(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))
 

arch/loongarch/vdso/Makefile

···
 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

arch/mips/Makefile.postlink

···
 	$(call if_changed,relocs)
 endif
 
-%.ko: FORCE
-	@true
-
 clean:
 	@true
 

arch/parisc/Makefile

···
 	$(Q)$(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

arch/powerpc/Makefile.postlink

···
 	$(call if_changed,relocs_check)
 endif
 
-%.ko: FORCE
-	@true
-
 clean:
 	rm -f .tmp_symbols.txt
 

arch/riscv/Makefile

···
 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
···
 
 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)

arch/riscv/Makefile.postlink

···
 	$(call if_changed,relocs_strip)
 endif
 
-%.ko: FORCE
-	@true
-
 clean:
 	@true
 

arch/riscv/kernel/compat_vdso/Makefile

···
 # 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

arch/riscv/kernel/vdso/Makefile

···
       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

arch/s390/Makefile

···
 zfcpdump:
 	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
-vdso_install:
-	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
-
 archheaders:
 	$(Q)$(MAKE) $(build)=$(syscalls) uapi
 
···
 	$(Q)$(MAKE) $(build)=arch/s390/kernel/vdso64 include/generated/vdso64-offsets.h
 	$(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

arch/s390/kernel/vdso32/Makefile

···
 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 $@

arch/s390/kernel/vdso64/Makefile

···
 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 $@

arch/sparc/Makefile

···
 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

arch/sparc/vdso/Makefile

···
 
 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

arch/x86/Makefile

···
 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:

arch/x86/Makefile.postlink

···
 	$(call cmd,strip_relocs)
 endif
 
-%.ko: FORCE
-	@true
-
 clean:
 	@rm -f $(OUT_RELOCS)/vmlinux.relocs
 

arch/x86/entry/vdso/Makefile

···
 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*

arch/x86/um/vdso/Makefile

···
 
 VDSO_LDFLAGS = -fPIC -shared -Wl,--hash-style=sysv -z noexecstack
 GCOV_PROFILE := n
-
-#
-# Install the unstripped copy of vdso*.so listed in $(vdso-install-y).
-#
-quiet_cmd_vdso_install = INSTALL $@
-      cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
-$(vdso-install-y): %.so: $(obj)/%.so.dbg FORCE
-	@mkdir -p $(MODLIB)/vdso
-	$(call cmd,vdso_install)
-
-PHONY += vdso_install $(vdso-install-y)
-vdso_install: $(vdso-install-y)

include/asm-generic/vmlinux.lds.h

···
 	*(.ref.data)							\
 	*(.data..shared_aligned) /* percpu related */			\
 	MEM_KEEP(init.data*)						\
-	MEM_KEEP(exit.data*)						\
 	*(.data.unlikely)						\
 	__start_once = .;						\
 	*(.data.once)							\
···
 	__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {		\
 		*(.ref.rodata)						\
 		MEM_KEEP(init.rodata)					\
-		MEM_KEEP(exit.rodata)					\
 	}								\
 									\
 	/* Built-in module parameters. */				\
···
 		*(.ref.text)						\
 		*(.text.asan.* .text.tsan.*)				\
 	MEM_KEEP(init.text*)						\
-	MEM_KEEP(exit.text*)						\
 
 
 /* sched.text is aling to function alignment to secure we have same
···
 	*(.exit.data .exit.data.*)					\
 	*(.fini_array .fini_array.*)					\
 	*(.dtors .dtors.*)						\
-	MEM_DISCARD(exit.data*)						\
-	MEM_DISCARD(exit.rodata*)
 
 #define EXIT_TEXT							\
 	*(.exit.text)							\
 	*(.text.exit)							\
-	MEM_DISCARD(exit.text)
 
 #define EXIT_CALL							\
 	*(.exitcall.exit)

include/linux/init.h

···
 						  __latent_entropy
 #define __meminitdata    __section(".meminit.data")
 #define __meminitconst   __section(".meminit.rodata")
-#define __memexit        __section(".memexit.text") __exitused __cold notrace
-#define __memexitdata    __section(".memexit.data")
-#define __memexitconst   __section(".memexit.rodata")
 
 /* For assembly routines */
 #define __HEAD		.section	".head.text","ax"

rust/Makefile

···
 quiet_cmd_rustc_procmacro = $(RUSTC_OR_CLIPPY_QUIET) P $@
       cmd_rustc_procmacro = \
 	$(RUSTC_OR_CLIPPY) $(rust_common_flags) \
+		-Clinker-flavor=gcc -Clinker=$(HOSTCC) \
+		-Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \
 		--emit=dep-info=$(depfile) --emit=link=$@ --extern proc_macro \
 		--crate-type proc-macro \
 		--crate-name $(patsubst lib%.so,%,$(notdir $@)) $<

scripts/Makefile.btf

···
+# SPDX-License-Identifier: GPL-2.0
+
+pahole-ver := $(CONFIG_PAHOLE_VERSION)
+pahole-flags-y :=
+
+# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
+ifeq ($(call test-le, $(pahole-ver), 121),y)
+pahole-flags-$(call test-ge, $(pahole-ver), 118)	+= --skip_encoding_btf_vars
+endif
+
+pahole-flags-$(call test-ge, $(pahole-ver), 121)	+= --btf_gen_floats
+
+pahole-flags-$(call test-ge, $(pahole-ver), 122)	+= -j
+
+pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE)		+= --lang_exclude=rust
+
+pahole-flags-$(call test-ge, $(pahole-ver), 125)	+= --skip_encoding_btf_inconsistent_proto --btf_gen_optimized
+
+export PAHOLE_FLAGS := $(pahole-flags-y)

scripts/Makefile.build

···
 	$(call if_changed,ar)
 
 quiet_cmd_ld_multi_m = LD [M]  $@
-      cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool)
+      cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool)
 
 define rule_ld_multi_m
 	$(call cmd_and_savecmd,ld_multi_m)

scripts/Makefile.host

···
 # current working directory, which may be not accessible in the out-of-tree
 # modules case.
 hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
+		 -Clinker-flavor=gcc -Clinker=$(HOSTCC) \
+		 -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \
                  $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
                  $(HOSTRUSTFLAGS_$(target-stem))
 

scripts/Makefile.modfinal

···
 %.mod.o: %.mod.c FORCE
 	$(call if_changed_dep,cc_o_c)
 
-ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
-
 quiet_cmd_ld_ko_o = LD [M]  $@
       cmd_ld_ko_o +=							\
 	$(LD) -r $(KBUILD_LDFLAGS)					\
 		$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE)		\
-		-T scripts/module.lds -o $@ $(filter %.o, $^);		\
-	$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
+		-T scripts/module.lds -o $@ $(filter %.o, $^)
 
 quiet_cmd_btf_ko = BTF [M] $@
       cmd_btf_ko = 							\

scripts/Makefile.package

···
 # ---------------------------------------------------------------------------
 
 quiet_cmd_mkspec = GEN     $@
-      cmd_mkspec = $(srctree)/scripts/package/mkspec > $@
+      cmd_mkspec = $(srctree)/scripts/package/mkspec $@
 
-kernel.spec: FORCE
+rpmbuild/SPECS/kernel.spec: FORCE
 	$(call cmd,mkspec)
 
 PHONY += rpm-sources
···
 binrpm-pkg: private build-type := b
 
 rpm-pkg srcrpm-pkg: rpm-sources
-rpm-pkg srcrpm-pkg binrpm-pkg: kernel.spec
-	+$(strip rpmbuild -b$(build-type) kernel.spec \
+rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec
+	+$(strip rpmbuild -b$(build-type) rpmbuild/SPECS/kernel.spec \
 	--define='_topdir $(abspath rpmbuild)' \
 	$(if $(filter a b, $(build-type)), \
 		--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \
 		$$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps)) \
-	$(if $(filter b, $(build-type)), \
-		--without devel) \
 	$(RPMOPTS))
 
 # deb-pkg srcdeb-pkg bindeb-pkg

scripts/Makefile.userprogs

···
 user_ccflags	= -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(userccflags) \
 			$($(target-stem)-userccflags)
 user_ldflags	= $(KBUILD_USERLDFLAGS) $(userldflags) $($(target-stem)-userldflags)
+user_ldlibs	= $(userldlibs) $($(target-stem)-userldlibs)
 
 # Create an executable from a single .c file
 quiet_cmd_user_cc_c = CC [U]  $@
       cmd_user_cc_c = $(CC) $(user_ccflags) $(user_ldflags) -o $@ $< \
-		      $($(target-stem)-userldlibs)
+		      $(user_ldlibs)
 $(user-csingle): $(obj)/%: $(src)/%.c FORCE
 	$(call if_changed_dep,user_cc_c)
 
 # Link an executable based on list of .o files
 quiet_cmd_user_ld = LD [U]  $@
       cmd_user_ld = $(CC) $(user_ldflags) -o $@ \
-		    $(addprefix $(obj)/, $($(target-stem)-objs)) \
-		    $($(target-stem)-userldlibs)
+		    $(addprefix $(obj)/, $($(target-stem)-objs)) $(user_ldlibs)
 $(user-cmulti): FORCE
 	$(call if_changed,user_ld)
 $(call multi_depend, $(user-cmulti), , -objs)

scripts/Makefile.vdsoinst

···
+# 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)

scripts/dummy-tools/gcc

···
 		fi
 		exit 0
 	fi
+
+	# For arch/powerpc/tools/gcc-check-fpatchable-function-entry.sh
+	if arg_contain -m64 "$@" && arg_contain -fpatchable-function-entry=2 "$@"; then
+		echo "func:"
+		echo ".section __patchable_function_entries"
+		echo ".localentry"
+		echo "  nop"
+		echo "  nop"
+		exit 0
+	fi
 fi
 
 # To set GCC_PLUGINS

scripts/mod/Makefile

···
 hostprogs-always-y	+= modpost mk_elfconfig
 always-y		+= empty.o
 
-modpost-objs	:= modpost.o file2alias.o sumversion.o
+modpost-objs	:= modpost.o file2alias.o sumversion.o symsearch.o
 
 devicetable-offsets-file := devicetable-offsets.h
 
···
 
 # dependencies on generated files need to be listed explicitly
 
-$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h
+$(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o $(obj)/symsearch.o: $(obj)/elfconfig.h
 $(obj)/file2alias.o: $(obj)/$(devicetable-offsets-file)
 
 quiet_cmd_elfconfig = MKELF   $@

scripts/mod/file2alias.c

···
 /* Looks like: tee:uuid */
 static int do_tee_entry(const char *filename, void *symval, char *alias)
 {
-	DEF_FIELD(symval, tee_client_device_id, uuid);
+	DEF_FIELD_ADDR(symval, tee_client_device_id, uuid);
 
 	sprintf(alias, "tee:%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
-		uuid.b[0], uuid.b[1], uuid.b[2], uuid.b[3], uuid.b[4],
-		uuid.b[5], uuid.b[6], uuid.b[7], uuid.b[8], uuid.b[9],
-		uuid.b[10], uuid.b[11], uuid.b[12], uuid.b[13], uuid.b[14],
-		uuid.b[15]);
+		uuid->b[0], uuid->b[1], uuid->b[2], uuid->b[3], uuid->b[4],
+		uuid->b[5], uuid->b[6], uuid->b[7], uuid->b[8], uuid->b[9],
+		uuid->b[10], uuid->b[11], uuid->b[12], uuid->b[13], uuid->b[14],
+		uuid->b[15]);
 
 	add_wildcard(alias);
 	return 1;
···
 /* Looks like: ishtp:{guid} */
 static int do_ishtp_entry(const char *filename, void *symval, char *alias)
 {
-	DEF_FIELD(symval, ishtp_device_id, guid);
+	DEF_FIELD_ADDR(symval, ishtp_device_id, guid);
 
 	strcpy(alias, ISHTP_MODULE_PREFIX "{");
-	add_guid(alias, guid);
+	add_guid(alias, *guid);
 	strcat(alias, "}");
 
 	return 1;

scripts/mod/modpost.c

···
 #include <errno.h>
 #include "modpost.h"
 #include "../../include/linux/license.h"
-#include "../../include/linux/module_symbol.h"
 
 static bool module_enabled;
 /* Are we using CONFIG_MODVERSIONS? */
···
 			*p = TO_NATIVE(*p);
 	}
 
+	symsearch_init(info);
+
 	return 1;
 }
 
 static void parse_elf_finish(struct elf_info *info)
 {
+	symsearch_finish(info);
 	release_file(info->hdr, info->size);
 }
 
···
 #define ALL_INIT_DATA_SECTIONS \
 	".init.setup", ".init.rodata", ".meminit.rodata", \
 	".init.data", ".meminit.data"
-#define ALL_EXIT_DATA_SECTIONS \
-	".exit.data", ".memexit.data"
-
-#define ALL_INIT_TEXT_SECTIONS \
-	".init.text", ".meminit.text"
-#define ALL_EXIT_TEXT_SECTIONS \
-	".exit.text", ".memexit.text"
 
 #define ALL_PCI_INIT_SECTIONS	\
 	".pci_fixup_early", ".pci_fixup_header", ".pci_fixup_final", \
 	".pci_fixup_enable", ".pci_fixup_resume", \
 	".pci_fixup_resume_early", ".pci_fixup_suspend"
 
-#define ALL_XXXINIT_SECTIONS MEM_INIT_SECTIONS
-#define ALL_XXXEXIT_SECTIONS MEM_EXIT_SECTIONS
+#define ALL_XXXINIT_SECTIONS ".meminit.*"
 
 #define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
-#define ALL_EXIT_SECTIONS EXIT_SECTIONS, ALL_XXXEXIT_SECTIONS
+#define ALL_EXIT_SECTIONS ".exit.*"
 
 #define DATA_SECTIONS ".data", ".data.rel"
 #define TEXT_SECTIONS ".text", ".text.*", ".sched.text", \
···
 		".coldtext", ".softirqentry.text"
 
 #define INIT_SECTIONS      ".init.*"
-#define MEM_INIT_SECTIONS  ".meminit.*"
 
-#define EXIT_SECTIONS      ".exit.*"
-#define MEM_EXIT_SECTIONS  ".memexit.*"
-
-#define ALL_TEXT_SECTIONS  ALL_INIT_TEXT_SECTIONS, ALL_EXIT_TEXT_SECTIONS, \
+#define ALL_TEXT_SECTIONS  ".init.text", ".meminit.text", ".exit.text", \
 		TEXT_SECTIONS, OTHER_TEXT_SECTIONS
 
 enum mismatch {
-	TEXT_TO_ANY_INIT,
-	DATA_TO_ANY_INIT,
-	TEXTDATA_TO_ANY_EXIT,
+	TEXTDATA_TO_ANY_INIT_EXIT,
 	XXXINIT_TO_SOME_INIT,
-	XXXEXIT_TO_SOME_EXIT,
 	ANY_INIT_TO_ANY_EXIT,
 	ANY_EXIT_TO_ANY_INIT,
 	EXTABLE_TO_NON_TEXT,
···
  * normal code and data
  */
 {
-	.fromsec = { TEXT_SECTIONS, NULL },
-	.bad_tosec = { ALL_INIT_SECTIONS, NULL },
-	.mismatch = TEXT_TO_ANY_INIT,
-},
-{
-	.fromsec = { DATA_SECTIONS, NULL },
-	.bad_tosec = { ALL_XXXINIT_SECTIONS, INIT_SECTIONS, NULL },
-	.mismatch = DATA_TO_ANY_INIT,
-},
-{
 	.fromsec = { TEXT_SECTIONS, DATA_SECTIONS, NULL },
-	.bad_tosec = { ALL_EXIT_SECTIONS, NULL },
-	.mismatch = TEXTDATA_TO_ANY_EXIT,
+	.bad_tosec = { ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL },
+	.mismatch = TEXTDATA_TO_ANY_INIT_EXIT,
 },
 /* Do not reference init code/data from meminit code/data */
 {
 	.fromsec = { ALL_XXXINIT_SECTIONS, NULL },
 	.bad_tosec = { INIT_SECTIONS, NULL },
 	.mismatch = XXXINIT_TO_SOME_INIT,
-},
-/* Do not reference exit code/data from memexit code/data */
-{
-	.fromsec = { ALL_XXXEXIT_SECTIONS, NULL },
-	.bad_tosec = { EXIT_SECTIONS, NULL },
-	.mismatch = XXXEXIT_TO_SOME_EXIT,
 },
 /* Do not use exit code/data from init code */
 {
···
 	/* symbols in data sections that may refer to any init/exit sections */
 	if (match(fromsec, PATTERNS(DATA_SECTIONS)) &&
 	    match(tosec, PATTERNS(ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS)) &&
-	    match(fromsym, PATTERNS("*_template", // scsi uses *_template a lot
-				    "*_timer", // arm uses ops structures named _timer a lot
-				    "*_sht", // scsi also used *_sht to some extent
-				    "*_ops",
-				    "*_probe",
-				    "*_probe_one",
-				    "*_console")))
-		return 0;
-
-	/* symbols in data sections that may refer to meminit sections */
-	if (match(fromsec, PATTERNS(DATA_SECTIONS)) &&
-	    match(tosec, PATTERNS(ALL_XXXINIT_SECTIONS, ALL_XXXEXIT_SECTIONS)) &&
-	    match(fromsym, PATTERNS("*driver")))
+	    match(fromsym, PATTERNS("*_ops", "*_probe", "*_console")))
 		return 0;
 
 	/*
···
 	 */
 	if (!extra_warn &&
 	    match(fromsec, PATTERNS(DATA_SECTIONS)) &&
-	    match(tosec, PATTERNS(EXIT_SECTIONS)) &&
+	    match(tosec, PATTERNS(ALL_EXIT_SECTIONS)) &&
 	    match(fromsym, PATTERNS("*driver")))
 		return 0;
 
···
 	return 1;
 }
 
-/*
- * If there's no name there, ignore it; likewise, ignore it if it's
- * one of the magic symbols emitted used by current tools.
- *
- * Otherwise if find_symbols_between() returns those symbols, they'll
- * fail the whitelist tests and cause lots of false alarms ... fixable
- * only by merging __exit and __init sections into __text, bloating
- * the kernel (which is especially evil on embedded platforms).
- */
-static inline bool is_valid_name(struct elf_info *elf, Elf_Sym *sym)
-{
-	const char *name = elf->strtab + sym->st_name;
-
-	if (!name || !strlen(name))
-		return false;
-	return !is_mapping_symbol(name);
-}
-
-/* Look up the nearest symbol based on the section and the address */
-static Elf_Sym *find_nearest_sym(struct elf_info *elf, Elf_Addr addr,
-				 unsigned int secndx, bool allow_negative,
-				 Elf_Addr min_distance)
-{
-	Elf_Sym *sym;
-	Elf_Sym *near = NULL;
-	Elf_Addr sym_addr, distance;
-	bool is_arm = (elf->hdr->e_machine == EM_ARM);
-
-	for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
-		if (get_secindex(elf, sym) != secndx)
-			continue;
-		if (!is_valid_name(elf, sym))
-			continue;
-
-		sym_addr = sym->st_value;
-
-		/*
-		 * For ARM Thumb instruction, the bit 0 of st_value is set
-		 * if the symbol is STT_FUNC type. Mask it to get the address.
-		 */
-		if (is_arm && ELF_ST_TYPE(sym->st_info) == STT_FUNC)
-			 sym_addr &= ~1;
-
-		if (addr >= sym_addr)
-			distance = addr - sym_addr;
-		else if (allow_negative)
-			distance = sym_addr - addr;
-		else
-			continue;
-
-		if (distance <= min_distance) {
-			min_distance = distance;
-			near = sym;
-		}
-
-		if (min_distance == 0)
-			break;
-	}
-	return near;
-}
-
 static Elf_Sym *find_fromsym(struct elf_info *elf, Elf_Addr addr,
 			     unsigned int secndx)
 {
-	return find_nearest_sym(elf, addr, secndx, false, ~0);
+	return symsearch_find_nearest(elf, addr, secndx, false, ~0);
 }
 
 static Elf_Sym *find_tosym(struct elf_info *elf, Elf_Addr addr, Elf_Sym *sym)
···
 	 * Strive to find a better symbol name, but the resulting name may not
 	 * match the symbol referenced in the original code.
 	 */
-	return find_nearest_sym(elf, addr, get_secindex(elf, sym), true, 20);
+	return symsearch_find_nearest(elf, addr, get_secindex(elf, sym),
+				      true, 20);
 }
 
 static bool is_executable_section(struct elf_info *elf, unsigned int secndx)
···
 	    ELF_ST_TYPE(sym->st_info) == STT_LOPROC)
 		s->is_func = true;
 
-	if (match(secname, PATTERNS(INIT_SECTIONS)))
+	if (match(secname, PATTERNS(ALL_INIT_SECTIONS)))
 		warn("%s: %s: EXPORT_SYMBOL used for init symbol. Remove __init or EXPORT_SYMBOL.\n",
 		     mod->name, name);
-	else if (match(secname, PATTERNS(EXIT_SECTIONS)))
+	else if (match(secname, PATTERNS(ALL_EXIT_SECTIONS)))
 		warn("%s: %s: EXPORT_SYMBOL used for exit symbol. Remove __exit or EXPORT_SYMBOL.\n",
 		     mod->name, name);
 }
···
 		return;
 	}
 
-	if (is_64bit) {
-		Elf64_Xword r_info64 = r_info;
-
-		r_info = TO_NATIVE(r_info64);
-	} else {
-		Elf32_Word r_info32 = r_info;
-
-		r_info = TO_NATIVE(r_info32);
-	}
+	if (is_64bit)
+		r_info = TO_NATIVE((Elf64_Xword)r_info);
+	else
+		r_info = TO_NATIVE((Elf32_Word)r_info);
 
 	*r_type = ELF_R_TYPE(r_info);
 	*r_sym = ELF_R_SYM(r_info);
 }
 
 static void section_rela(struct module *mod, struct elf_info *elf,
-			 Elf_Shdr *sechdr)
+			 unsigned int fsecndx, const char *fromsec,
+			 const Elf_Rela *start, const Elf_Rela *stop)
 {
-	Elf_Rela *rela;
-	unsigned int fsecndx = sechdr->sh_info;
-	const char *fromsec = sec_name(elf, fsecndx);
-	Elf_Rela *start = (void *)elf->hdr + sechdr->sh_offset;
-	Elf_Rela *stop  = (void *)start + sechdr->sh_size;
-
-	/* if from section (name) is know good then skip it */
-	if (match(fromsec, section_white_list))
-		return;
+	const Elf_Rela *rela;
 
 	for (rela = start; rela < stop; rela++) {
 		Elf_Addr taddr, r_offset;
···
 }
 
 static void section_rel(struct module *mod, struct elf_info *elf,
-			Elf_Shdr *sechdr)
+			unsigned int fsecndx, const char *fromsec,
+			const Elf_Rel *start, const Elf_Rel *stop)
 {
-	Elf_Rel *rel;
-	unsigned int fsecndx = sechdr->sh_info;
-	const char *fromsec = sec_name(elf, fsecndx);
-	Elf_Rel *start = (void *)elf->hdr + sechdr->sh_offset;
-	Elf_Rel *stop  = (void *)start + sechdr->sh_size;
-
-	/* if from section (name) is know good then skip it */
-	if (match(fromsec, section_white_list))
-		return;
+	const Elf_Rel *rel;
 
 	for (rel = start; rel < stop; rel++) {
 		Elf_Sym *tsym;
···
 static void check_sec_ref(struct module *mod, struct elf_info *elf)
 {
 	int i;
-	Elf_Shdr *sechdrs = elf->sechdrs;
 
 	/* Walk through all sections */
 	for (i = 0; i < elf->num_sections; i++) {
-		check_section(mod->name, elf, &elf->sechdrs[i]);
+		Elf_Shdr *sechdr = &elf->sechdrs[i];
+
+		check_section(mod->name, elf, sechdr);
 		/* We want to process only relocation sections and not .init */
-		if (sechdrs[i].sh_type == SHT_RELA)
-			section_rela(mod, elf, &elf->sechdrs[i]);
-		else if (sechdrs[i].sh_type == SHT_REL)
-			section_rel(mod, elf, &elf->sechdrs[i]);
+		if (sechdr->sh_type == SHT_REL || sechdr->sh_type == SHT_RELA) {
+			/* section to which the relocation applies */
+			unsigned int secndx = sechdr->sh_info;
+			const char *secname = sec_name(elf, secndx);
+			const void *start, *stop;
+
+			/* If the section is known good, skip it */
+			if (match(secname, section_white_list))
+				continue;
+
+			start = sym_get_data_by_offset(elf, i, 0);
+			stop = start + sechdr->sh_size;
+
+			if (sechdr->sh_type == SHT_RELA)
+				section_rela(mod, elf, secndx, secname,
+					     start, stop);
+			else
+				section_rel(mod, elf, secndx, secname,
+					    start, stop);
+		}
 	}
 }
 

scripts/mod/modpost.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <byteswap.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
···
 #include <fcntl.h>
 #include <unistd.h>
 #include <elf.h>
+#include "../../include/linux/module_symbol.h"
 
 #include "list.h"
 #include "elfconfig.h"
···
 #define ELF_R_TYPE  ELF64_R_TYPE
 #endif
 
+#define bswap(x) \
+({ \
+	_Static_assert(sizeof(x) == 1 || sizeof(x) == 2 || \
+		       sizeof(x) == 4 || sizeof(x) == 8, "bug"); \
+	(typeof(x))(sizeof(x) == 2 ? bswap_16(x) : \
+		    sizeof(x) == 4 ? bswap_32(x) : \
+		    sizeof(x) == 8 ? bswap_64(x) : \
+		    x); \
+})
+
 #if KERNEL_ELFDATA != HOST_ELFDATA
 
-static inline void __endian(const void *src, void *dest, unsigned int size)
-{
-	unsigned int i;
-	for (i = 0; i < size; i++)
-		((unsigned char*)dest)[i] = ((unsigned char*)src)[size - i-1];
-}
-
-#define TO_NATIVE(x)						\
-({								\
-	typeof(x) __x;						\
-	__endian(&(x), &(__x), sizeof(__x));			\
-	__x;							\
-})
+#define TO_NATIVE(x) (bswap(x))
 
 #else /* endianness matches */
 
···
 	 * take shndx from symtab_shndx_start[N] instead */
 	Elf32_Word   *symtab_shndx_start;
 	Elf32_Word   *symtab_shndx_stop;
+
+	struct symsearch *symsearch;
 };
 
 /* Accessor for sym->st_shndx, hides ugliness of "64k sections" */
···
 
 	return index;
 }
+
+/*
+ * If there's no name there, ignore it; likewise, ignore it if it's
+ * one of the magic symbols emitted used by current tools.
+ *
+ * Internal symbols created by tools should be ignored by modpost.
+ */
+static inline bool is_valid_name(struct elf_info *elf, Elf_Sym *sym)
+{
+	const char *name = elf->strtab + sym->st_name;
+
+	if (!name || !strlen(name))
+		return false;
+	return !is_mapping_symbol(name);
+}
+
+/* symsearch.c */
+void symsearch_init(struct elf_info *elf);
+void symsearch_finish(struct elf_info *elf);
+Elf_Sym *symsearch_find_nearest(struct elf_info *elf, Elf_Addr addr,
+				unsigned int secndx, bool allow_negative,
+				Elf_Addr min_distance);
 
 /* file2alias.c */
 void handle_moddevtable(struct module *mod, struct elf_info *info,

scripts/mod/symsearch.c

···
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Helper functions for finding the symbol in an ELF which is "nearest"
+ * to a given address.
+ */
+
+#include "modpost.h"
+
+struct syminfo {
+	unsigned int symbol_index;
+	unsigned int section_index;
+	Elf_Addr addr;
+};
+
+/*
+ * Container used to hold an entire binary search table.
+ * Entries in table are ascending, sorted first by section_index,
+ * then by addr, and last by symbol_index.  The sorting by
+ * symbol_index is used to ensure predictable behavior when
+ * multiple symbols are present with the same address; all
+ * symbols past the first are effectively ignored, by eliding
+ * them in symsearch_fixup().
+ */
+struct symsearch {
+	unsigned int table_size;
+	struct syminfo table[];
+};
+
+static int syminfo_compare(const void *s1, const void *s2)
+{
+	const struct syminfo *sym1 = s1;
+	const struct syminfo *sym2 = s2;
+
+	if (sym1->section_index > sym2->section_index)
+		return 1;
+	if (sym1->section_index < sym2->section_index)
+		return -1;
+	if (sym1->addr > sym2->addr)
+		return 1;
+	if (sym1->addr < sym2->addr)
+		return -1;
+	if (sym1->symbol_index > sym2->symbol_index)
+		return 1;
+	if (sym1->symbol_index < sym2->symbol_index)
+		return -1;
+	return 0;
+}
+
+static unsigned int symbol_count(struct elf_info *elf)
+{
+	unsigned int result = 0;
+
+	for (Elf_Sym *sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+		if (is_valid_name(elf, sym))
+			result++;
+	}
+	return result;
+}
+
+/*
+ * Populate the search array that we just allocated.
+ * Be slightly paranoid here.  The ELF file is mmap'd and could
+ * conceivably change between symbol_count() and symsearch_populate().
+ * If we notice any difference, bail out rather than potentially
+ * propagating errors or crashing.
+ */
+static void symsearch_populate(struct elf_info *elf,
+			       struct syminfo *table,
+			       unsigned int table_size)
+{
+	bool is_arm = (elf->hdr->e_machine == EM_ARM);
+
+	for (Elf_Sym *sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
+		if (is_valid_name(elf, sym)) {
+			if (table_size-- == 0)
+				fatal("%s: size mismatch\n", __func__);
+			table->symbol_index = sym - elf->symtab_start;
+			table->section_index = get_secindex(elf, sym);
+			table->addr = sym->st_value;
+
+			/*
+			 * For ARM Thumb instruction, the bit 0 of st_value is
+			 * set if the symbol is STT_FUNC type. Mask it to get
+			 * the address.
+			 */
+			if (is_arm && ELF_ST_TYPE(sym->st_info) == STT_FUNC)
+				table->addr &= ~1;
+
+			table++;
+		}
+	}
+
+	if (table_size != 0)
+		fatal("%s: size mismatch\n", __func__);
+}
+
+/*
+ * Do any fixups on the table after sorting.
+ * For now, this just finds adjacent entries which have
+ * the same section_index and addr, and it propagates
+ * the first symbol_index over the subsequent entries,
+ * so that only one symbol_index is seen for any given
+ * section_index and addr.  This ensures that whether
+ * we're looking at an address from "above" or "below"
+ * that we see the same symbol_index.
+ * This does leave some duplicate entries in the table;
+ * in practice, these are a small fraction of the
+ * total number of entries, and they are harmless to
+ * the binary search algorithm other than a few occasional
+ * unnecessary comparisons.
+ */
+static void symsearch_fixup(struct syminfo *table, unsigned int table_size)
+{
+	/* Don't look at index 0, it will never change. */
+	for (unsigned int i = 1; i < table_size; i++) {
+		if (table[i].addr == table[i - 1].addr &&
+		    table[i].section_index == table[i - 1].section_index) {
+			table[i].symbol_index = table[i - 1].symbol_index;
+		}
+	}
+}
+
+void symsearch_init(struct elf_info *elf)
+{
+	unsigned int table_size = symbol_count(elf);
+
+	elf->symsearch = NOFAIL(malloc(sizeof(struct symsearch) +
+				       sizeof(struct syminfo) * table_size));
+	elf->symsearch->table_size = table_size;
+
+	symsearch_populate(elf, elf->symsearch->table, table_size);
+	qsort(elf->symsearch->table, table_size,
+	      sizeof(struct syminfo), syminfo_compare);
+
+	symsearch_fixup(elf->symsearch->table, table_size);
+}
+
+void symsearch_finish(struct elf_info *elf)
+{
+	free(elf->symsearch);
+	elf->symsearch = NULL;
+}
+
+/*
+ * Find the syminfo which is in secndx and "nearest" to addr.
+ * allow_negative: allow returning a symbol whose address is > addr.
+ * min_distance: ignore symbols which are further away than this.
+ *
+ * Returns a pointer into the symbol table for success.
+ * Returns NULL if no legal symbol is found within the requested range.
+ */
+Elf_Sym *symsearch_find_nearest(struct elf_info *elf, Elf_Addr addr,
+				unsigned int secndx, bool allow_negative,
+				Elf_Addr min_distance)
+{
+	unsigned int hi = elf->symsearch->table_size;
+	unsigned int lo = 0;
+	struct syminfo *table = elf->symsearch->table;
+	struct syminfo target;
+
+	target.addr = addr;
+	target.section_index = secndx;
+	target.symbol_index = ~0;  /* compares greater than any actual index */
+	while (hi > lo) {
+		unsigned int mid = lo + (hi - lo) / 2;  /* Avoids overflow */
+
+		if (syminfo_compare(&table[mid], &target) > 0)
+			hi = mid;
+		else
+			lo = mid + 1;
+	}
+
+	/*
+	 * table[hi], if it exists, is the first entry in the array which
+	 * lies beyond target.  table[hi - 1], if it exists, is the last
+	 * entry in the array which comes before target, including the
+	 * case where it perfectly matches the section and the address.
+	 *
+	 * Note -- if the address we're looking up falls perfectly
+	 * in the middle of two symbols, this is written to always
+	 * prefer the symbol with the lower address.
+	 */
+	Elf_Sym *result = NULL;
+
+	if (allow_negative &&
+	    hi < elf->symsearch->table_size &&
+	    table[hi].section_index == secndx &&
+	    table[hi].addr - addr <= min_distance) {
+		min_distance = table[hi].addr - addr;
+		result = &elf->symtab_start[table[hi].symbol_index];
+	}
+	if (hi > 0 &&
+	    table[hi - 1].section_index == secndx &&
+	    addr - table[hi - 1].addr <= min_distance) {
+		result = &elf->symtab_start[table[hi - 1].symbol_index];
+	}
+	return result;
+}

scripts/package/mkspec

···
 #	Patched for non-x86 by Opencon (L) 2002 <[e-mail]>
 #
 
+output=$1
+
+mkdir -p "$(dirname "${output}")"
+
+exec >"${output}"
+
 if grep -q CONFIG_MODULES=y include/config/auto.conf; then
 echo '%define with_devel %{?_without_devel: 0} %{?!_without_devel: 1}'
 else

scripts/pahole-flags.sh

···
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-
-extra_paholeopt=
-
-if ! [ -x "$(command -v ${PAHOLE})" ]; then
-	exit 0
-fi
-
-pahole_ver=$($(dirname $0)/pahole-version.sh ${PAHOLE})
-
-if [ "${pahole_ver}" -ge "118" ] && [ "${pahole_ver}" -le "121" ]; then
-	# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars
-	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_vars"
-fi
-if [ "${pahole_ver}" -ge "121" ]; then
-	extra_paholeopt="${extra_paholeopt} --btf_gen_floats"
-fi
-if [ "${pahole_ver}" -ge "122" ]; then
-	extra_paholeopt="${extra_paholeopt} -j"
-fi
-if [ "${pahole_ver}" -ge "124" ]; then
-	# see PAHOLE_HAS_LANG_EXCLUDE
-	extra_paholeopt="${extra_paholeopt} --lang_exclude=rust"
-fi
-if [ "${pahole_ver}" -ge "125" ]; then
-	extra_paholeopt="${extra_paholeopt} --skip_encoding_btf_inconsistent_proto --btf_gen_optimized"
-fi
-
-echo ${extra_paholeopt}

scripts/remove-stale-files

···
 
 find . -name '*.usyms' | xargs rm -f
 
-rm -f binkernel.spec
+rm -f *.spec