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Kbuild updates for v4.21

Browse source 
Kbuild core:
  - remove unneeded $(call cc-option,...) switches
  - consolidate Clang compiler flags into CLANG_FLAGS
  - announce the deprecation of SUBDIRS
  - fix single target build for external module
  - simplify the dependencies of 'prepare' stage targets
  - allow fixdep to directly write to .*.cmd files
  - simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS
  - change if_changed_rule to accept multi-line recipe
  - move .SECONDARY special target to scripts/Kbuild.include
  - remove redundant 'set -e'
  - improve parallel execution for CONFIG_HEADERS_CHECK
  - misc cleanups
 
 Treewide fixes and cleanups
  - set Clang flags correctly for PowerPC boot images
  - fix UML build error with CONFIG_GCC_PLUGINS
  - remove unneeded patterns from .gitignore files
  - refactor firmware/Makefile
  - remove unneeded rules for *offsets.s
  - avoid unneeded regeneration of intermediate .s files
  - clean up ./Kbuild
 
 Modpost:
  - remove unused -M, -K options
  - fix false positive warnings about section mismatch
  - use simple devtable lookup instead of linker magic
  - misc cleanups
 
 Coccinelle:
  - relax boolinit.cocci checks for overall consistency
  - fix warning messages of boolinit.cocci
 
 Other tools:
  - improve -dirty check of scripts/setlocalversion
  - add a tool to generate compile_commands.json from .*.cmd files
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Merge tag 'kbuild-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:
 "Kbuild core:
   - remove unneeded $(call cc-option,...) switches
   - consolidate Clang compiler flags into CLANG_FLAGS
   - announce the deprecation of SUBDIRS
   - fix single target build for external module
   - simplify the dependencies of 'prepare' stage targets
   - allow fixdep to directly write to .*.cmd files
   - simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS
   - change if_changed_rule to accept multi-line recipe
   - move .SECONDARY special target to scripts/Kbuild.include
   - remove redundant 'set -e'
   - improve parallel execution for CONFIG_HEADERS_CHECK
   - misc cleanups

  Treewide fixes and cleanups
   - set Clang flags correctly for PowerPC boot images
   - fix UML build error with CONFIG_GCC_PLUGINS
   - remove unneeded patterns from .gitignore files
   - refactor firmware/Makefile
   - remove unneeded rules for *offsets.s
   - avoid unneeded regeneration of intermediate .s files
   - clean up ./Kbuild

  Modpost:
   - remove unused -M, -K options
   - fix false positive warnings about section mismatch
   - use simple devtable lookup instead of linker magic
   - misc cleanups

  Coccinelle:
   - relax boolinit.cocci checks for overall consistency
   - fix warning messages of boolinit.cocci

  Other tools:
   - improve -dirty check of scripts/setlocalversion
   - add a tool to generate compile_commands.json from .*.cmd files"

* tag 'kbuild-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (51 commits)
  kbuild: remove unused cmd_gentimeconst
  kbuild: remove $(obj)/ prefixes in ./Kbuild
  treewide: add intermediate .s files to targets
  treewide: remove explicit rules for *offsets.s
  firmware: refactor firmware/Makefile
  firmware: remove unnecessary patterns from .gitignore
  scripts: remove unnecessary ihex2fw and check-lc_ctypes from .gitignore
  um: remove unused filechk_gen_header in Makefile
  scripts: add a tool to produce a compile_commands.json file
  kbuild: add -Werror=implicit-int flag unconditionally
  kbuild: add -Werror=strict-prototypes flag unconditionally
  kbuild: add -fno-PIE flag unconditionally
  scripts: coccinelle: Correct warning message
  scripts: coccinelle: only suggest true/false in files that already use them
  kbuild: handle part-of-module correctly for *.ll and *.symtypes
  kbuild: refactor part-of-module
  kbuild: refactor quiet_modtag
  kbuild: remove redundant quiet_modtag for $(obj-m)
  kbuild: refactor Makefile.asm-generic
  user/Makefile: Fix typo and capitalization in comment section
  ...
This commit is contained in:
Linus Torvalds 2018-12-29 12:03:17 -08:00
commit 668c35f69c
37 changed files with 541 additions and 560 deletions
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7
Documentation/kbuild/kbuild.txt
View file

@ -81,12 +81,7 @@ KBUILD_EXTMOD
--------------------------------------------------
Set the directory to look for the kernel source when building external
modules.
The directory can be specified in several ways:
1) Use "M=..." on the command line
2) Environment variable KBUILD_EXTMOD
3) Environment variable SUBDIRS
The possibilities are listed in the order they take precedence.
Using "M=..." will always override the others.
Setting "M=..." takes precedence over KBUILD_EXTMOD.
KBUILD_OUTPUT
--------------------------------------------------

21
Kbuild
View file

@ -16,11 +16,7 @@ bounds-file := include/generated/bounds.h
always := $(bounds-file)
targets := kernel/bounds.s
# We use internal kbuild rules to avoid the "is up to date" message from make
kernel/bounds.s: kernel/bounds.c FORCE
$(call if_changed_dep,cc_s_c)
$(obj)/$(bounds-file): kernel/bounds.s FORCE
$(bounds-file): kernel/bounds.s FORCE
$(call filechk,offsets,__LINUX_BOUNDS_H__)
#####
@ -30,15 +26,11 @@ timeconst-file := include/generated/timeconst.h
targets += $(timeconst-file)
quiet_cmd_gentimeconst = GEN $@
define cmd_gentimeconst
(echo $(CONFIG_HZ) | bc -q $< ) > $@
endef
define filechk_gentimeconst
(echo $(CONFIG_HZ) | bc -q $< )
endef
$(obj)/$(timeconst-file): kernel/time/timeconst.bc FORCE
$(timeconst-file): kernel/time/timeconst.bc FORCE
$(call filechk,gentimeconst)
#####
@ -50,12 +42,9 @@ offsets-file := include/generated/asm-offsets.h
always += $(offsets-file)
targets += arch/$(SRCARCH)/kernel/asm-offsets.s
# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
$(obj)/$(timeconst-file) $(obj)/$(bounds-file) FORCE
$(call if_changed_dep,cc_s_c)
arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
$(call filechk,offsets,__ASM_OFFSETS_H__)
#####
@ -77,7 +66,7 @@ missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py
build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file)
build_constants_py: $(timeconst-file) $(bounds-file)
@$(MAKE) $(build)=scripts/gdb/linux $@
# Keep these three files during make clean

111
Makefile
View file

@ -186,6 +186,10 @@ endif
# Old syntax make ... SUBDIRS=$PWD is still supported
# Setting the environment variable KBUILD_EXTMOD take precedence
ifdef SUBDIRS
$(warning ================= WARNING ================)
$(warning 'SUBDIRS' will be removed after Linux 5.3)
$(warning Please use 'M=' or 'KBUILD_EXTMOD' instead)
$(warning ==========================================)
KBUILD_EXTMOD ?= $(SUBDIRS)
endif
@ -422,10 +426,10 @@ LINUXINCLUDE := \
-I$(objtree)/include \
$(USERINCLUDE)
KBUILD_AFLAGS := -D__ASSEMBLY__
KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common -fshort-wchar \
-Werror-implicit-function-declaration \
KBUILD_AFLAGS := -D__ASSEMBLY__ -fno-PIE
KBUILD_CFLAGS := -Wall -Wundef -Werror=strict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common -fshort-wchar -fno-PIE \
-Werror-implicit-function-declaration -Werror=implicit-int \
-Wno-format-security \
-std=gnu89
KBUILD_CPPFLAGS := -D__KERNEL__
@ -487,18 +491,18 @@ endif
ifneq ($(shell $(CC) --version 2>&1 | head -n 1 | grep clang),)
ifneq ($(CROSS_COMPILE),)
CLANG_TARGET := --target=$(notdir $(CROSS_COMPILE:%-=%))
CLANG_FLAGS := --target=$(notdir $(CROSS_COMPILE:%-=%))
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(LD)))
CLANG_PREFIX := --prefix=$(GCC_TOOLCHAIN_DIR)
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)
GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
endif
ifneq ($(GCC_TOOLCHAIN),)
CLANG_GCC_TC := --gcc-toolchain=$(GCC_TOOLCHAIN)
CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
endif
KBUILD_CFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
KBUILD_AFLAGS += $(CLANG_TARGET) $(CLANG_GCC_TC) $(CLANG_PREFIX)
KBUILD_CFLAGS += $(call cc-option, -no-integrated-as)
KBUILD_AFLAGS += $(call cc-option, -no-integrated-as)
CLANG_FLAGS += -no-integrated-as
KBUILD_CFLAGS += $(CLANG_FLAGS)
KBUILD_AFLAGS += $(CLANG_FLAGS)
export CLANG_FLAGS
endif
RETPOLINE_CFLAGS_GCC := -mindirect-branch=thunk-extern -mindirect-branch-register
@ -510,9 +514,6 @@ RETPOLINE_VDSO_CFLAGS := $(call cc-option,$(RETPOLINE_VDSO_CFLAGS_GCC),$(call cc
export RETPOLINE_CFLAGS
export RETPOLINE_VDSO_CFLAGS
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
# check for 'asm goto'
ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
CC_HAVE_ASM_GOTO := 1
@ -828,12 +829,6 @@ KBUILD_CFLAGS += $(call cc-option,-fno-stack-check,)
# conserve stack if available
KBUILD_CFLAGS += $(call cc-option,-fconserve-stack)
# disallow errors like 'EXPORT_GPL(foo);' with missing header
KBUILD_CFLAGS += $(call cc-option,-Werror=implicit-int)
# require functions to have arguments in prototypes, not empty 'int foo()'
KBUILD_CFLAGS += $(call cc-option,-Werror=strict-prototypes)
# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS += $(call cc-option,-Werror=date-time)
@ -1026,14 +1021,13 @@ cmd_link-vmlinux = \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
ifdef CONFIG_HEADERS_CHECK
$(Q)$(MAKE) -f $(srctree)/Makefile headers_check
endif
ifdef CONFIG_GDB_SCRIPTS
$(Q)ln -fsn $(abspath $(srctree)/scripts/gdb/vmlinux-gdb.py)
endif
+$(call if_changed,link-vmlinux)
targets := vmlinux
# Build samples along the rest of the kernel. This needs headers_install.
ifdef CONFIG_SAMPLES
vmlinux-dirs += samples
@ -1051,7 +1045,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
# Error messages still appears in the original language
PHONY += $(vmlinux-dirs)
$(vmlinux-dirs): prepare scripts
$(vmlinux-dirs): prepare
$(Q)$(MAKE) $(build)=$@ need-builtin=1
define filechk_kernel.release
@ -1066,7 +1060,7 @@ include/config/kernel.release: $(srctree)/Makefile FORCE
# Carefully list dependencies so we do not try to build scripts twice
# in parallel
PHONY += scripts
scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h)
scripts: scripts_basic scripts_dtc
$(Q)$(MAKE) $(build)=$(@)
# Things we need to do before we recursively start building the kernel
@ -1099,22 +1093,23 @@ prepare2: prepare3 outputmakefile asm-generic
prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
$(cmd_crmodverdir)
archprepare: archheaders archscripts prepare1 scripts_basic
archprepare: archheaders archscripts prepare1 scripts
prepare0: archprepare gcc-plugins
prepare0: archprepare
$(Q)$(MAKE) $(build)=scripts/mod
$(Q)$(MAKE) $(build)=.
# All the preparing..
prepare: prepare0 prepare-objtool
# Support for using generic headers in asm-generic
asm-generic := -f $(srctree)/scripts/Makefile.asm-generic obj
PHONY += asm-generic uapi-asm-generic
asm-generic: uapi-asm-generic
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
src=asm obj=arch/$(SRCARCH)/include/generated/asm
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/asm
uapi-asm-generic:
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
src=uapi/asm obj=arch/$(SRCARCH)/include/generated/uapi/asm
$(Q)$(MAKE) $(asm-generic)=arch/$(SRCARCH)/include/generated/uapi/asm
PHONY += prepare-objtool
prepare-objtool: $(objtool_target)
@ -1199,6 +1194,10 @@ headers_check: headers_install
$(Q)$(MAKE) $(hdr-inst)=include/uapi dst=include HDRCHECK=1
$(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi $(hdr-dst) HDRCHECK=1
ifdef CONFIG_HEADERS_CHECK
all: headers_check
endif
# ---------------------------------------------------------------------------
# Kernel selftest
@ -1283,7 +1282,7 @@ modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
# Target to prepare building external modules
PHONY += modules_prepare
modules_prepare: prepare scripts
modules_prepare: prepare
# Target to install modules
PHONY += modules_install
@ -1551,9 +1550,6 @@ else # KBUILD_EXTMOD
# We are always building modules
KBUILD_MODULES := 1
PHONY += crmodverdir
crmodverdir:
$(cmd_crmodverdir)
PHONY += $(objtree)/Module.symvers
$(objtree)/Module.symvers:
@ -1565,7 +1561,7 @@ $(objtree)/Module.symvers:
module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
PHONY += $(module-dirs) modules
$(module-dirs): crmodverdir $(objtree)/Module.symvers
$(module-dirs): prepare $(objtree)/Module.symvers
$(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
modules: $(module-dirs)
@ -1604,10 +1600,9 @@ help:
@echo ' clean - remove generated files in module directory only'
@echo ''
# Dummies...
PHONY += prepare scripts
prepare: ;
scripts: ;
PHONY += prepare
prepare:
$(cmd_crmodverdir)
endif # KBUILD_EXTMOD
clean: $(clean-dirs)
@ -1712,36 +1707,33 @@ else
target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
endif
%.s: %.c prepare scripts FORCE
%.s: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.i: %.c prepare scripts FORCE
%.i: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.c prepare scripts FORCE
%.o: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.lst: %.c prepare scripts FORCE
%.lst: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.s: %.S prepare scripts FORCE
%.s: %.S prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.o: %.S prepare scripts FORCE
%.o: %.S prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.symtypes: %.c prepare scripts FORCE
%.symtypes: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
%.ll: %.c prepare scripts FORCE
%.ll: %.c prepare FORCE
$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
# Modules
/: prepare scripts FORCE
$(cmd_crmodverdir)
/: prepare FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
$(build)=$(build-dir)
# Make sure the latest headers are built for Documentation
Documentation/ samples/: headers_install
%/: prepare scripts FORCE
$(cmd_crmodverdir)
%/: prepare FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
$(build)=$(build-dir)
%.ko: prepare scripts FORCE
$(cmd_crmodverdir)
%.ko: prepare FORCE
$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
$(build)=$(build-dir) $(@:.ko=.o)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
@ -1765,13 +1757,12 @@ quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
cmd_crmodverdir = $(Q)mkdir -p $(MODVERDIR) \
$(if $(KBUILD_MODULES),; rm -f $(MODVERDIR)/*)
# read all saved command lines
cmd_files := $(wildcard .*.cmd)
# read saved command lines for existing targets
existing-targets := $(wildcard $(sort $(targets)))
ifneq ($(cmd_files),)
$(cmd_files): ; # Do not try to update included dependency files
include $(cmd_files)
endif
cmd_files := $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
$(cmd_files): ; # Do not try to update included dependency files
-include $(cmd_files)
endif # ifeq ($(config-targets),1)
endif # ifeq ($(mixed-targets),1)

2
arch/arm/crypto/Makefile
View file

@ -67,4 +67,4 @@ $(src)/sha512-core.S_shipped: $(src)/sha512-armv4.pl
$(call cmd,perl)
endif
targets += sha256-core.S sha512-core.S
clean-files += sha256-core.S sha512-core.S

5
arch/arm/mach-at91/Makefile
View file

@ -19,10 +19,9 @@ ifeq ($(CONFIG_PM_DEBUG),y)
CFLAGS_pm.o += -DDEBUG
endif
arch/arm/mach-at91/pm_data-offsets.s: arch/arm/mach-at91/pm_data-offsets.c
$(call if_changed_dep,cc_s_c)
include/generated/at91_pm_data-offsets.h: arch/arm/mach-at91/pm_data-offsets.s FORCE
$(call filechk,offsets,__PM_DATA_OFFSETS_H__)
arch/arm/mach-at91/pm_suspend.o: include/generated/at91_pm_data-offsets.h
targets += pm_data-offsets.s

5
arch/arm/mach-omap2/Makefile
View file

@ -236,10 +236,9 @@ obj-y += omap_phy_internal.o
obj-$(CONFIG_MACH_OMAP2_TUSB6010) += usb-tusb6010.o
arch/arm/mach-omap2/pm-asm-offsets.s: arch/arm/mach-omap2/pm-asm-offsets.c
$(call if_changed_dep,cc_s_c)
include/generated/ti-pm-asm-offsets.h: arch/arm/mach-omap2/pm-asm-offsets.s FORCE
$(call filechk,offsets,__TI_PM_ASM_OFFSETS_H__)
$(obj)/sleep33xx.o $(obj)/sleep43xx.o: include/generated/ti-pm-asm-offsets.h
targets += pm-asm-offsets.s

2
arch/arm64/crypto/Makefile
View file

@ -78,4 +78,4 @@ $(src)/sha512-core.S_shipped: $(src)/sha512-armv8.pl
$(call cmd,perlasm)
endif
targets += sha256-core.S sha512-core.S
clean-files += sha256-core.S sha512-core.S

7
arch/ia64/kernel/Makefile
View file

@ -50,10 +50,7 @@ CFLAGS_traps.o += -mfixed-range=f2-f5,f16-f31
# The gate DSO image is built using a special linker script.
include $(src)/Makefile.gate
# We use internal kbuild rules to avoid the "is up to date" message from make
arch/$(SRCARCH)/kernel/nr-irqs.s: arch/$(SRCARCH)/kernel/nr-irqs.c
$(Q)mkdir -p $(dir $@)
$(call if_changed_dep,cc_s_c)
include/generated/nr-irqs.h: arch/$(SRCARCH)/kernel/nr-irqs.s FORCE
$(call filechk,offsets,__ASM_NR_IRQS_H__)
targets += nr-irqs.s

5
arch/powerpc/boot/Makefile
View file

@ -55,6 +55,11 @@ BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
BOOTARFLAGS := -cr$(KBUILD_ARFLAGS)
ifdef CONFIG_CC_IS_CLANG
BOOTCFLAGS += $(CLANG_FLAGS)
BOOTAFLAGS += $(CLANG_FLAGS)
endif
ifdef CONFIG_DEBUG_INFO
BOOTCFLAGS += -g
endif

26
arch/um/Makefile
View file

@ -23,8 +23,6 @@ OS := $(shell uname -s)
# features.
SHELL := /bin/bash
filechk_gen_header = $<
core-y += $(ARCH_DIR)/kernel/ \
$(ARCH_DIR)/drivers/ \
$(ARCH_DIR)/os-$(OS)/
@ -116,7 +114,8 @@ endef
archheaders:
$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
archprepare: include/generated/user_constants.h
archprepare:
$(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
@ -146,25 +145,4 @@ archclean:
@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
-o -name '*.gcov' \) -type f -print | xargs rm -f
# Generated files
$(HOST_DIR)/um/user-offsets.s: __headers FORCE
$(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
define filechk_gen-asm-offsets
(set -e; \
echo "/*"; \
echo " * DO NOT MODIFY."; \
echo " *"; \
echo " * This file was generated by arch/$(ARCH)/Makefile"; \
echo " *"; \
echo " */"; \
echo ""; \
sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}" < $<; \
echo ""; )
endef
include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
$(call filechk,gen-asm-offsets)
export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH

5
arch/x86/um/Makefile
View file

@ -36,9 +36,12 @@ subarch-$(CONFIG_MODULES) += ../kernel/module.o
USER_OBJS := bugs_$(BITS).o ptrace_user.o fault.o
extra-y += user-offsets.s
$(obj)/user-offsets.s: c_flags = -Wp,-MD,$(depfile) $(USER_CFLAGS) \
-Iarch/x86/include/generated
targets += user-offsets.s
include/generated/user_constants.h: $(obj)/user-offsets.s
$(call filechk,offsets,__USER_CONSTANT_H__)
UNPROFILE_OBJS := stub_segv.o
CFLAGS_stub_segv.o := $(CFLAGS_NO_HARDENING)

5
drivers/memory/Makefile.asm-offsets
View file

@ -1,5 +1,4 @@
drivers/memory/emif-asm-offsets.s: drivers/memory/emif-asm-offsets.c
$(call if_changed_dep,cc_s_c)
include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE
$(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__)
targets += emif-asm-offsets.s

7
drivers/mtd/maps/scx200_docflash.c
View file

@ -216,10 +216,3 @@ static void __exit cleanup_scx200_docflash(void)
module_init(init_scx200_docflash);
module_exit(cleanup_scx200_docflash);
/*
Local variables:
compile-command: "make -k -C ../../.. SUBDIRS=drivers/mtd/maps modules"
c-basic-offset: 8
End:
*/

7
drivers/watchdog/scx200_wdt.c
View file

@ -262,10 +262,3 @@ static void __exit scx200_wdt_cleanup(void)
module_init(scx200_wdt_init);
module_exit(scx200_wdt_cleanup);
/*
Local variables:
compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
c-basic-offset: 8
End:
*/

5
firmware/.gitignore vendored
View file

@ -1,6 +1 @@
*.gen.S
*.fw
*.bin
*.csp
*.dsp
ihex2fw

76
firmware/Makefile
View file

@ -1,61 +1,41 @@
# SPDX-License-Identifier: GPL-2.0
#
# kbuild file for firmware/
#
# Create $(fwabs) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
# Create $(fwdir) from $(CONFIG_EXTRA_FIRMWARE_DIR) -- if it doesn't have a
# leading /, it's relative to $(srctree).
fwdir := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE_DIR))
fwabs := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
fwdir := $(addprefix $(srctree)/,$(filter-out /%,$(fwdir)))$(filter /%,$(fwdir))
fw-external-y := $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE))
obj-y := $(addsuffix .gen.o, $(subst $(quote),,$(CONFIG_EXTRA_FIRMWARE)))
quiet_cmd_fwbin = MK_FW $@
cmd_fwbin = FWNAME="$(patsubst firmware/%.gen.S,%,$@)"; \
FWSTR="$(subst /,_,$(subst .,_,$(subst -,_,$(patsubst \
firmware/%.gen.S,%,$@))))"; \
ASM_WORD=$(if $(CONFIG_64BIT),.quad,.long); \
ASM_ALIGN=$(if $(CONFIG_64BIT),3,2); \
PROGBITS=$(if $(CONFIG_ARM),%,@)progbits; \
echo "/* Generated by firmware/Makefile */" > $@;\
echo " .section .rodata" >>$@;\
echo " .p2align $${ASM_ALIGN}" >>$@;\
echo "_fw_$${FWSTR}_bin:" >>$@;\
echo " .incbin \"$(2)\"" >>$@;\
echo "_fw_end:" >>$@;\
echo " .section .rodata.str,\"aMS\",$${PROGBITS},1" >>$@;\
echo " .p2align $${ASM_ALIGN}" >>$@;\
echo "_fw_$${FWSTR}_name:" >>$@;\
echo " .string \"$$FWNAME\"" >>$@;\
echo " .section .builtin_fw,\"a\",$${PROGBITS}" >>$@;\
echo " .p2align $${ASM_ALIGN}" >>$@;\
echo " $${ASM_WORD} _fw_$${FWSTR}_name" >>$@;\
echo " $${ASM_WORD} _fw_$${FWSTR}_bin" >>$@;\
echo " $${ASM_WORD} _fw_end - _fw_$${FWSTR}_bin" >>$@;
FWNAME = $(patsubst $(obj)/%.gen.S,%,$@)
FWSTR = $(subst /,_,$(subst .,_,$(subst -,_,$(FWNAME))))
ASM_WORD = $(if $(CONFIG_64BIT),.quad,.long)
ASM_ALIGN = $(if $(CONFIG_64BIT),3,2)
PROGBITS = $(if $(CONFIG_ARM),%,@)progbits
# One of these files will change, or come into existence, whenever
# the configuration changes between 32-bit and 64-bit. The .S files
# need to change when that happens.
wordsize_deps := $(wildcard include/config/64bit.h include/config/32bit.h \
include/config/ppc32.h include/config/ppc64.h \
include/config/superh32.h include/config/superh64.h \
include/config/x86_32.h include/config/x86_64.h \
firmware/Makefile)
filechk_fwbin = { \
echo "/* Generated by $(src)/Makefile */" ;\
echo " .section .rodata" ;\
echo " .p2align $(ASM_ALIGN)" ;\
echo "_fw_$(FWSTR)_bin:" ;\
echo " .incbin \"$(fwdir)/$(FWNAME)\"" ;\
echo "_fw_end:" ;\
echo " .section .rodata.str,\"aMS\",$(PROGBITS),1" ;\
echo " .p2align $(ASM_ALIGN)" ;\
echo "_fw_$(FWSTR)_name:" ;\
echo " .string \"$(FWNAME)\"" ;\
echo " .section .builtin_fw,\"a\",$(PROGBITS)" ;\
echo " .p2align $(ASM_ALIGN)" ;\
echo " $(ASM_WORD) _fw_$(FWSTR)_name" ;\
echo " $(ASM_WORD) _fw_$(FWSTR)_bin" ;\
echo " $(ASM_WORD) _fw_end - _fw_$(FWSTR)_bin" ;\
}
$(patsubst %,$(obj)/%.gen.S, $(fw-external-y)): %: $(wordsize_deps) \
include/config/extra/firmware/dir.h
$(call cmd,fwbin,$(fwabs)/$(patsubst $(obj)/%.gen.S,%,$@))
$(obj)/%.gen.S: FORCE
$(call filechk,fwbin)
# The .o files depend on the binaries directly; the .S files don't.
$(patsubst %,$(obj)/%.gen.o, $(fw-external-y)): $(obj)/%.gen.o: $(fwdir)/%
obj-y += $(patsubst %,%.gen.o, $(fw-external-y))
ifeq ($(KBUILD_SRC),)
# Makefile.build only creates subdirectories for O= builds, but external
# firmware might live outside the kernel source tree
_dummy := $(foreach d,$(addprefix $(obj)/,$(dir $(fw-external-y))), $(shell [ -d $(d) ] || mkdir -p $(d)))
endif
$(addprefix $(obj)/, $(obj-y)): $(obj)/%.gen.o: $(fwdir)/%
targets := $(patsubst $(obj)/%,%, \
$(shell find $(obj) -name \*.gen.S 2>/dev/null))

13
include/asm-generic/export.h
View file

@ -59,16 +59,19 @@ __kcrctab_\name:
.endm
#undef __put
#if defined(__KSYM_DEPS__)
#define __EXPORT_SYMBOL(sym, val, sec) === __KSYM_##sym ===
#elif defined(CONFIG_TRIM_UNUSED_KSYMS)
#if defined(CONFIG_TRIM_UNUSED_KSYMS)
#include <linux/kconfig.h>
#include <generated/autoksyms.h>
.macro __ksym_marker sym
.section ".discard.ksym","a"
__ksym_marker_\sym:
.previous
.endm
#define __EXPORT_SYMBOL(sym, val, sec) \
__ksym_marker sym; \
__cond_export_sym(sym, val, sec, __is_defined(__KSYM_##sym))
#define __cond_export_sym(sym, val, sec, conf) \
___cond_export_sym(sym, val, sec, conf)

22
include/linux/export.h
View file

@ -92,22 +92,22 @@ struct kernel_symbol {
*/
#define __EXPORT_SYMBOL(sym, sec)
#elif defined(__KSYM_DEPS__)
/*
* For fine grained build dependencies, we want to tell the build system
* about each possible exported symbol even if they're not actually exported.
* We use a string pattern that is unlikely to be valid code that the build
* system filters out from the preprocessor output (see ksym_dep_filter
* in scripts/Kbuild.include).
*/
#define __EXPORT_SYMBOL(sym, sec) === __KSYM_##sym ===
#elif defined(CONFIG_TRIM_UNUSED_KSYMS)
#include <generated/autoksyms.h>
/*
* For fine grained build dependencies, we want to tell the build system
* about each possible exported symbol even if they're not actually exported.
* We use a symbol pattern __ksym_marker_<symbol> that the build system filters
* from the $(NM) output (see scripts/gen_ksymdeps.sh). These symbols are
* discarded in the final link stage.
*/
#define __ksym_marker(sym) \
static int __ksym_marker_##sym[0] __section(".discard.ksym") __used
#define __EXPORT_SYMBOL(sym, sec) \
__ksym_marker(sym); \
__cond_export_sym(sym, sec, __is_defined(__KSYM_##sym))
#define __cond_export_sym(sym, sec, conf) \
___cond_export_sym(sym, sec, conf)

4
samples/bpf/Makefile
View file

@ -235,12 +235,10 @@ $(LIBBPF): FORCE
# Fix up variables inherited from Kbuild that tools/ build system won't like
$(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O=
$(obj)/syscall_nrs.s: $(src)/syscall_nrs.c
$(call if_changed_dep,cc_s_c)
$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
$(call filechk,offsets,__SYSCALL_NRS_H__)
targets += syscall_nrs.s
clean-files += syscall_nrs.h
FORCE:

2
samples/connector/Makefile
View file

@ -14,4 +14,4 @@ HOSTCFLAGS_ucon.o += -I$(objtree)/usr/include
all: modules
modules clean:
$(MAKE) -C ../.. SUBDIRS=$(CURDIR) $@
$(MAKE) -C ../.. M=$(CURDIR) $@

2
scripts/.gitignore vendored
View file

@ -6,9 +6,7 @@ conmakehash
kallsyms
pnmtologo
unifdef
ihex2fw
recordmcount
check-lc_ctype
sortextable
asn1_compiler
extract-cert

52
scripts/Kbuild.include
View file

@ -213,7 +213,7 @@ echo-cmd = $(if $($(quiet)cmd_$(1)),\
echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';)
# printing commands
cmd = @$(echo-cmd) $(cmd_$(1))
cmd = @set -e; $(echo-cmd) $(cmd_$(1))
# Add $(obj)/ for paths that are not absolute
objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
@ -249,56 +249,21 @@ any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
# Execute command if command has changed or prerequisite(s) are updated.
if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
@set -e; \
$(echo-cmd) $(cmd_$(1)); \
$(cmd); \
printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
# Execute the command and also postprocess generated .d dependencies file.
if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \
@set -e; \
$(cmd_and_fixdep), @:)
ifndef CONFIG_TRIM_UNUSED_KSYMS
if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),$(cmd_and_fixdep),@:)
cmd_and_fixdep = \
$(echo-cmd) $(cmd_$(1)); \
scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\
rm -f $(depfile); \
mv -f $(dot-target).tmp $(dot-target).cmd;
else
# Filter out exported kernel symbol names from the preprocessor output.
# See also __KSYM_DEPS__ in include/linux/export.h.
# We disable the depfile generation here, so as not to overwrite the existing
# depfile while fixdep is parsing it.
flags_nodeps = $(filter-out -Wp$(comma)-M%, $($(1)))
ksym_dep_filter = \
case "$(1)" in \
cc_*_c|cpp_i_c) \
$(CPP) $(call flags_nodeps,c_flags) -D__KSYM_DEPS__ $< ;; \
as_*_S|cpp_s_S) \
$(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;; \
boot*|build*|cpp_its_S|*cpp_lds_S|dtc|host*|vdso*) : ;; \
*) echo "Don't know how to preprocess $(1)" >&2; false ;; \
esac | tr ";" "\n" | sed -n 's/^.*=== __KSYM_\(.*\) ===.*$$/_\1/p'
cmd_and_fixdep = \
$(echo-cmd) $(cmd_$(1)); \
$(ksym_dep_filter) | \
scripts/basic/fixdep -e $(depfile) $@ '$(make-cmd)' \
> $(dot-target).tmp; \
rm -f $(depfile); \
mv -f $(dot-target).tmp $(dot-target).cmd;
endif
$(cmd); \
scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
rm -f $(depfile)
# Usage: $(call if_changed_rule,foo)
# Will check if $(cmd_foo) or any of the prerequisites changed,
# and if so will execute $(rule_foo).
if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \
@set -e; \
$(rule_$(1)), @:)
if_changed_rule = $(if $(strip $(any-prereq) $(arg-check)),$(rule_$(1)),@:)
###
# why - tell why a target got built
@ -391,3 +356,6 @@ endef
# delete partially updated (i.e. corrupted) files on error
.DELETE_ON_ERROR:
# do not delete intermediate files automatically
.SECONDARY:

4
scripts/Makefile
View file

@ -36,10 +36,10 @@ PHONY += build_unifdef
build_unifdef: $(obj)/unifdef
@:
subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
subdir-$(CONFIG_MODVERSIONS) += genksyms
subdir-y += mod
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
subdir-$(CONFIG_GDB_SCRIPTS) += gdb
# Let clean descend into subdirs
subdir- += basic dtc kconfig package gcc-plugins
subdir- += basic dtc kconfig mod package

37
scripts/Makefile.asm-generic
View file

@ -2,41 +2,42 @@
# include/asm-generic contains a lot of files that are used
# verbatim by several architectures.
#
# This Makefile reads the file arch/$(SRCARCH)/include/$(src)/Kbuild
# This Makefile reads the file arch/$(SRCARCH)/include/(uapi/)/asm/Kbuild
# and for each file listed in this file with generic-y creates
# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/$(src))
# a small wrapper file in arch/$(SRCARCH)/include/generated/(uapi/)/asm.
PHONY := all
all:
kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild
-include $(kbuild-file)
src := $(subst /generated,,$(obj))
-include $(src)/Kbuild
include scripts/Kbuild.include
# Create output directory if not already present
_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
generic-y := $(addprefix $(obj)/, $(generic-y))
generated-y := $(addprefix $(obj)/, $(generated-y))
# Stale wrappers when the corresponding files are removed from generic-y
# need removing.
generated-y := $(generic-y) $(generated-y)
all-files := $(patsubst %, $(obj)/%, $(generated-y))
old-headers := $(wildcard $(obj)/*.h)
unwanted := $(filter-out $(all-files),$(old-headers))
# Remove stale wrappers when the corresponding files are removed from generic-y
old-headers := $(wildcard $(obj)/*.h)
unwanted := $(filter-out $(generic-y) $(generated-y),$(old-headers))
quiet_cmd_wrap = WRAP $@
cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@
cmd_wrap = echo "\#include <asm-generic/$*.h>" > $@
quiet_cmd_remove = REMOVE $(unwanted)
cmd_remove = rm -f $(unwanted)
cmd_remove = rm -f $(unwanted)
all: $(patsubst %, $(obj)/%, $(generic-y)) FORCE
$(if $(unwanted),$(call cmd,remove),)
all: $(generic-y)
$(if $(unwanted),$(call cmd,remove))
@:
$(obj)/%.h:
$(call cmd,wrap)
PHONY += FORCE
# Create output directory. Skip it if at least one old header exists
# since we know the output directory already exists.
ifeq ($(old-headers),)
$(shell mkdir -p $(obj))
endif
.PHONY: $(PHONY)
FORCE: ;

128
scripts/Makefile.build
View file

@ -75,14 +75,14 @@ __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
# Linus' kernel sanity checking tool
ifeq ($(KBUILD_CHECKSRC),1)
quiet_cmd_checksrc = CHECK $<
cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
else ifeq ($(KBUILD_CHECKSRC),2)
quiet_cmd_force_checksrc = CHECK $<
cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
endif
ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ;
cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
endif
# Do section mismatch analysis for each module/built-in.a
@ -94,23 +94,14 @@ endif
# ---------------------------------------------------------------------------
# Default is built-in, unless we know otherwise
$(foreach x, i ll lst o s symtypes, $(patsubst %.o,%.$(x),$(real-obj-m))): \
part-of-module := y
modkern_cflags = \
$(if $(part-of-module), \
$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
quiet_modtag := $(empty) $(empty)
$(real-obj-m) : part-of-module := y
$(real-obj-m:.o=.i) : part-of-module := y
$(real-obj-m:.o=.s) : part-of-module := y
$(real-obj-m:.o=.lst): part-of-module := y
$(real-obj-m) : quiet_modtag := [M]
$(real-obj-m:.o=.i) : quiet_modtag := [M]
$(real-obj-m:.o=.s) : quiet_modtag := [M]
$(real-obj-m:.o=.lst): quiet_modtag := [M]
$(obj-m) : quiet_modtag := [M]
quiet_modtag = $(if $(part-of-module),[M], )
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
@ -134,7 +125,6 @@ cmd_gensymtypes_c = \
quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
cmd_cc_symtypes_c = \
set -e; \
$(call cmd_gensymtypes_c,true,$@) >/dev/null; \
test -s $@ || rm -f $@
@ -154,36 +144,31 @@ $(obj)/%.ll: $(src)/%.c FORCE
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
ifndef CONFIG_MODVERSIONS
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
else
ifdef CONFIG_MODVERSIONS
# When module versioning is enabled the following steps are executed:
# o compile a .tmp_<file>.o from <file>.c
# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
# not export symbols, we just rename .tmp_<file>.o to <file>.o and
# are done.
# o compile a <file>.o from <file>.c
# o if <file>.o doesn't contain a __ksymtab version, i.e. does
# not export symbols, it's done.
# o otherwise, we calculate symbol versions using the good old
# genksyms on the preprocessed source and postprocess them in a way
# that they are usable as a linker script
# o generate <file>.o from .tmp_<file>.o using the linker to
# o generate .tmp_<file>.o from <file>.o using the linker to
# replace the unresolved symbols __crc_exported_symbol with
# the actual value of the checksum generated by genksyms
cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
# o remove .tmp_<file>.o to <file>.o
cmd_modversions_c = \
if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \
$(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
> $(@D)/.tmp_$(@F:.o=.ver); \
\
$(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
$(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \
-T $(@D)/.tmp_$(@F:.o=.ver); \
rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
else \
mv -f $(@D)/.tmp_$(@F) $@; \
fi;
rm -f $(@D)/.tmp_$(@F:.o=.ver); \
fi
endif
ifdef CONFIG_FTRACE_MCOUNT_RECORD
@ -204,7 +189,7 @@ sub_cmd_record_mcount = \
recordmcount_source := $(srctree)/scripts/recordmcount.c \
$(srctree)/scripts/recordmcount.h
else
sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
"$(if $(CONFIG_64BIT),64,32)" \
"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
@ -216,7 +201,7 @@ cmd_record_mcount = \
if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
"$(CC_FLAGS_FTRACE)" ]; then \
$(sub_cmd_record_mcount) \
fi;
fi
endif # CC_USING_RECORD_MCOUNT
endif # CONFIG_FTRACE_MCOUNT_RECORD
@ -239,19 +224,12 @@ ifdef CONFIG_RETPOLINE
objtool_args += --retpoline
endif
ifdef CONFIG_MODVERSIONS
objtool_o = $(@D)/.tmp_$(@F)
else
objtool_o = $(@)
endif
# 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
# 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
# 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
cmd_objtool = $(if $(patsubst y%,, \
$(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
$(__objtool_obj) $(objtool_args) "$(objtool_o)";)
$(__objtool_obj) $(objtool_args) $@)
objtool_obj = $(if $(patsubst y%,, \
$(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
$(__objtool_obj))
@ -264,19 +242,26 @@ objtool_dep = $(objtool_obj) \
$(wildcard include/config/orc/unwinder.h \
include/config/stack/validation.h)
ifdef CONFIG_TRIM_UNUSED_KSYMS
cmd_gen_ksymdeps = \
$(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
endif
define rule_cc_o_c
$(call echo-cmd,checksrc) $(cmd_checksrc) \
$(call cmd_and_fixdep,cc_o_c) \
$(cmd_checkdoc) \
$(call echo-cmd,objtool) $(cmd_objtool) \
$(cmd_modversions_c) \
$(call echo-cmd,record_mcount) $(cmd_record_mcount)
$(call cmd,checksrc)
$(call cmd_and_fixdep,cc_o_c)
$(call cmd,gen_ksymdeps)
$(call cmd,checkdoc)
$(call cmd,objtool)
$(call cmd,modversions_c)
$(call cmd,record_mcount)
endef
define rule_as_o_S
$(call cmd_and_fixdep,as_o_S) \
$(call echo-cmd,objtool) $(cmd_objtool) \
$(cmd_modversions_S)
$(call cmd_and_fixdep,as_o_S)
$(call cmd,gen_ksymdeps)
$(call cmd,objtool)
$(call cmd,modversions_S)
endef
# List module undefined symbols (or empty line if not enabled)
@ -340,7 +325,6 @@ cmd_gensymtypes_S = \
quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
cmd_cc_symtypes_S = \
set -e; \
$(call cmd_gensymtypes_S,true,$@) >/dev/null; \
test -s $@ || rm -f $@
@ -355,35 +339,27 @@ $(obj)/%.s: $(src)/%.S FORCE
$(call if_changed_dep,cpp_s_S)
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
ifndef CONFIG_MODVERSIONS
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
else
ifdef CONFIG_MODVERSIONS
ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)
ifeq ($(ASM_PROTOTYPES),)
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
else
ifneq ($(ASM_PROTOTYPES),)
# versioning matches the C process described above, with difference that
# we parse asm-prototypes.h C header to get function definitions.
cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $<
cmd_modversions_S = \
if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \
$(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
> $(@D)/.tmp_$(@F:.o=.ver); \
\
$(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
$(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \
-T $(@D)/.tmp_$(@F:.o=.ver); \
rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
else \
mv -f $(@D)/.tmp_$(@F) $@; \
fi;
rm -f $(@D)/.tmp_$(@F:.o=.ver); \
fi
endif
endif
@ -527,25 +503,19 @@ FORCE:
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
existing-targets := $(wildcard $(sort $(targets)))
ifneq ($(cmd_files),)
include $(cmd_files)
endif
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
ifneq ($(KBUILD_SRC),)
# Create directories for object files if they do not exist
obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
# If cmd_files exist, their directories apparently exist. Skip mkdir.
exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files))))
obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs)))
# If targets exist, their directories apparently exist. Skip mkdir.
existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
ifneq ($(obj-dirs),)
$(shell mkdir -p $(obj-dirs))
endif
endif
# Some files contained in $(targets) are intermediate artifacts.
# We never want them to be removed automatically.
.SECONDARY: $(targets)
.PHONY: $(PHONY)

8
scripts/Makefile.gcc-plugins
View file

@ -55,11 +55,3 @@ KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
# All enabled GCC plugins are collected here for building below.
GCC_PLUGIN := $(gcc-plugin-y)
export GCC_PLUGIN
# Actually do the build, if requested.
PHONY += gcc-plugins
gcc-plugins: scripts_basic
ifdef CONFIG_GCC_PLUGINS
$(Q)$(MAKE) $(build)=scripts/gcc-plugins
endif
@:

1
scripts/Makefile.headersinst
View file

@ -44,7 +44,6 @@ kbuild-file := $(srctree)/$(obj)/Kbuild
installdir := $(INSTALL_HDR_PATH)/$(dst)
gendir := $(objtree)/$(subst include/,include/generated/,$(obj))
header-files := $(notdir $(wildcard $(srcdir)/*.h))
header-files += $(notdir $(wildcard $(srcdir)/*.agh))
header-files := $(filter-out $(no-export-headers), $(header-files))
genhdr-files := $(notdir $(wildcard $(gendir)/*.h))
genhdr-files := $(filter-out $(header-files), $(genhdr-files))

2
scripts/Makefile.lib
View file

@ -426,7 +426,7 @@ endef
# Use filechk to avoid rebuilds when a header changes, but the resulting file
# does not
define filechk_offsets
(set -e; \
( \
echo "#ifndef $2"; \
echo "#define $2"; \
echo "/*"; \

31
scripts/basic/fixdep.c
View file

@ -105,8 +105,7 @@
static void usage(void)
{
fprintf(stderr, "Usage: fixdep [-e] <depfile> <target> <cmdline>\n");
fprintf(stderr, " -e insert extra dependencies given on stdin\n");
fprintf(stderr, "Usage: fixdep <depfile> <target> <cmdline>\n");
exit(1);
}
@ -131,21 +130,6 @@ static void print_dep(const char *m, int slen, const char *dir)
printf(".h) \\\n");
}
static void do_extra_deps(void)
{
char buf[80];
while (fgets(buf, sizeof(buf), stdin)) {
int len = strlen(buf);
if (len < 2 || buf[len - 1] != '\n') {
fprintf(stderr, "fixdep: bad data on stdin\n");
exit(1);
}
print_dep(buf, len - 1, "include/ksym");
}
}
struct item {
struct item *next;
unsigned int len;
@ -293,7 +277,7 @@ static int is_ignored_file(const char *s, int len)
* assignments are parsed not only by make, but also by the rather simple
* parser in scripts/mod/sumversion.c.
*/
static void parse_dep_file(char *m, const char *target, int insert_extra_deps)
static void parse_dep_file(char *m, const char *target)
{
char *p;
int is_last, is_target;
@ -369,9 +353,6 @@ static void parse_dep_file(char *m, const char *target, int insert_extra_deps)
exit(1);
}
if (insert_extra_deps)
do_extra_deps();
printf("\n%s: $(deps_%s)\n\n", target, target);
printf("$(deps_%s):\n", target);
}
@ -379,13 +360,9 @@ static void parse_dep_file(char *m, const char *target, int insert_extra_deps)
int main(int argc, char *argv[])
{
const char *depfile, *target, *cmdline;
int insert_extra_deps = 0;
void *buf;
if (argc == 5 && !strcmp(argv[1], "-e")) {
insert_extra_deps = 1;
argv++;
} else if (argc != 4)
if (argc != 4)
usage();
depfile = argv[1];
@ -395,7 +372,7 @@ int main(int argc, char *argv[])
printf("cmd_%s := %s\n\n", target, cmdline);
buf = read_file(depfile);
parse_dep_file(buf, target, insert_extra_deps);
parse_dep_file(buf, target);
free(buf);
return 0;

43
scripts/coccinelle/misc/boolinit.cocci
View file

@ -13,10 +13,17 @@ virtual context
virtual org
virtual report
@boolok@
symbol true,false;
@@
(
true
|
false
)
@depends on patch@
bool t;
symbol true;
symbol false;
@@
(
@ -63,7 +70,7 @@ bool t;
+ t
)
@depends on patch@
@depends on patch && boolok@
bool b;
@@
(
@ -116,19 +123,23 @@ position p;
* t@p != 0
)
@r3 depends on !patch@
@r3 depends on !patch && boolok@
bool b;
position p1,p2;
constant c;
position p1;
@@
(
*b@p1 = 0
|
*b@p1 = 1
|
*b@p2 = c
)
@r4 depends on !patch@
bool b;
position p2;
constant c != {0,1};
@@
*b@p2 = c
@script:python depends on org@
p << r1.p;
@@
@ -139,19 +150,19 @@ cocci.print_main("WARNING: Comparison to bool",p)
p << r2.p;
@@
cocci.print_main("WARNING: Comparison of bool to 0/1",p)
cocci.print_main("WARNING: Comparison of 0/1 to bool variable",p)
@script:python depends on org@
p1 << r3.p1;
@@
cocci.print_main("WARNING: Assignment of bool to 0/1",p1)
cocci.print_main("WARNING: Assignment of 0/1 to bool variable",p1)
@script:python depends on org@
p2 << r3.p2;
p2 << r4.p2;
@@
cocci.print_main("ERROR: Assignment of bool to non-0/1 constant",p2)
cocci.print_main("ERROR: Assignment of non-0/1 constant to bool variable",p2)
@script:python depends on report@
p << r1.p;
@ -163,16 +174,16 @@ coccilib.report.print_report(p[0],"WARNING: Comparison to bool")
p << r2.p;
@@
coccilib.report.print_report(p[0],"WARNING: Comparison of bool to 0/1")
coccilib.report.print_report(p[0],"WARNING: Comparison of 0/1 to bool variable")
@script:python depends on report@
p1 << r3.p1;
@@
coccilib.report.print_report(p1[0],"WARNING: Assignment of bool to 0/1")
coccilib.report.print_report(p1[0],"WARNING: Assignment of 0/1 to bool variable")
@script:python depends on report@
p2 << r3.p2;
p2 << r4.p2;
@@
coccilib.report.print_report(p2[0],"ERROR: Assignment of bool to non-0/1 constant")
coccilib.report.print_report(p2[0],"ERROR: Assignment of non-0/1 constant to bool variable")

151
scripts/gen_compile_commands.py Executable file
View file

@ -0,0 +1,151 @@
#!/usr/bin/env python
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) Google LLC, 2018
#
# Author: Tom Roeder <tmroeder@google.com>
#
"""A tool for generating compile_commands.json in the Linux kernel."""
import argparse
import json
import logging
import os
import re
_DEFAULT_OUTPUT = 'compile_commands.json'
_DEFAULT_LOG_LEVEL = 'WARNING'
_FILENAME_PATTERN = r'^\..*\.cmd$'
_LINE_PATTERN = r'^cmd_[^ ]*\.o := (.* )([^ ]*\.c)$'
_VALID_LOG_LEVELS = ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL']
# A kernel build generally has over 2000 entries in its compile_commands.json
# database. If this code finds 500 or fewer, then warn the user that they might
# not have all the .cmd files, and they might need to compile the kernel.
_LOW_COUNT_THRESHOLD = 500
def parse_arguments():
"""Sets up and parses command-line arguments.
Returns:
log_level: A logging level to filter log output.
directory: The directory to search for .cmd files.
output: Where to write the compile-commands JSON file.
"""
usage = 'Creates a compile_commands.json database from kernel .cmd files'
parser = argparse.ArgumentParser(description=usage)
directory_help = ('Path to the kernel source directory to search '
'(defaults to the working directory)')
parser.add_argument('-d', '--directory', type=str, help=directory_help)
output_help = ('The location to write compile_commands.json (defaults to '
'compile_commands.json in the search directory)')
parser.add_argument('-o', '--output', type=str, help=output_help)
log_level_help = ('The level of log messages to produce (one of ' +
', '.join(_VALID_LOG_LEVELS) + '; defaults to ' +
_DEFAULT_LOG_LEVEL + ')')
parser.add_argument(
'--log_level', type=str, default=_DEFAULT_LOG_LEVEL,
help=log_level_help)
args = parser.parse_args()
log_level = args.log_level
if log_level not in _VALID_LOG_LEVELS:
raise ValueError('%s is not a valid log level' % log_level)
directory = args.directory or os.getcwd()
output = args.output or os.path.join(directory, _DEFAULT_OUTPUT)
directory = os.path.abspath(directory)
return log_level, directory, output
def process_line(root_directory, file_directory, command_prefix, relative_path):
"""Extracts information from a .cmd line and creates an entry from it.
Args:
root_directory: The directory that was searched for .cmd files. Usually
used directly in the "directory" entry in compile_commands.json.
file_directory: The path to the directory the .cmd file was found in.
command_prefix: The extracted command line, up to the last element.
relative_path: The .c file from the end of the extracted command.
Usually relative to root_directory, but sometimes relative to
file_directory and sometimes neither.
Returns:
An entry to append to compile_commands.
Raises:
ValueError: Could not find the extracted file based on relative_path and
root_directory or file_directory.
"""
# The .cmd files are intended to be included directly by Make, so they
# escape the pound sign '#', either as '\#' or '$(pound)' (depending on the
# kernel version). The compile_commands.json file is not interepreted
# by Make, so this code replaces the escaped version with '#'.
prefix = command_prefix.replace('\#', '#').replace('$(pound)', '#')
cur_dir = root_directory
expected_path = os.path.join(cur_dir, relative_path)
if not os.path.exists(expected_path):
# Try using file_directory instead. Some of the tools have a different
# style of .cmd file than the kernel.
cur_dir = file_directory
expected_path = os.path.join(cur_dir, relative_path)
if not os.path.exists(expected_path):
raise ValueError('File %s not in %s or %s' %
(relative_path, root_directory, file_directory))
return {
'directory': cur_dir,
'file': relative_path,
'command': prefix + relative_path,
}
def main():
"""Walks through the directory and finds and parses .cmd files."""
log_level, directory, output = parse_arguments()
level = getattr(logging, log_level)
logging.basicConfig(format='%(levelname)s: %(message)s', level=level)
filename_matcher = re.compile(_FILENAME_PATTERN)
line_matcher = re.compile(_LINE_PATTERN)
compile_commands = []
for dirpath, _, filenames in os.walk(directory):
for filename in filenames:
if not filename_matcher.match(filename):
continue
filepath = os.path.join(dirpath, filename)
with open(filepath, 'rt') as f:
for line in f:
result = line_matcher.match(line)
if not result:
continue
try:
entry = process_line(directory, dirpath,
result.group(1), result.group(2))
compile_commands.append(entry)
except ValueError as err:
logging.info('Could not add line from %s: %s',
filepath, err)
with open(output, 'wt') as f:
json.dump(compile_commands, f, indent=2, sort_keys=True)
count = len(compile_commands)
if count < _LOW_COUNT_THRESHOLD:
logging.warning(
'Found %s entries. Have you compiled the kernel?', count)
if __name__ == '__main__':
main()

25
scripts/gen_ksymdeps.sh Executable file
View file

@ -0,0 +1,25 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
set -e
# List of exported symbols
ksyms=$($NM $1 | sed -n 's/.*__ksym_marker_\(.*\)/\1/p' | tr A-Z a-z)
if [ -z "$ksyms" ]; then
exit 0
fi
echo
echo "ksymdeps_$1 := \\"
for s in $ksyms
do
echo $s | sed -e 's:^_*: $(wildcard include/ksym/:' \
-e 's:__*:/:g' -e 's/$/.h) \\/'
done
echo
echo "$1: \$(ksymdeps_$1)"
echo
echo "\$(ksymdeps_$1):"

149
scripts/mod/file2alias.c
View file

@ -47,49 +47,9 @@ typedef struct {
struct devtable {
const char *device_id; /* name of table, __mod_<name>__*_device_table. */
unsigned long id_size;
void *function;
int (*do_entry)(const char *filename, void *symval, char *alias);
};
#define ___cat(a,b) a ## b
#define __cat(a,b) ___cat(a,b)
/* we need some special handling for this host tool running eventually on
* Darwin. The Mach-O section handling is a bit different than ELF section
* handling. The differnces in detail are:
* a) we have segments which have sections
* b) we need a API call to get the respective section symbols */
#if defined(__MACH__)
#include <mach-o/getsect.h>
#define INIT_SECTION(name) do { \
unsigned long name ## _len; \
char *__cat(pstart_,name) = getsectdata("__TEXT", \
#name, &__cat(name,_len)); \
char *__cat(pstop_,name) = __cat(pstart_,name) + \
__cat(name, _len); \
__cat(__start_,name) = (void *)__cat(pstart_,name); \
__cat(__stop_,name) = (void *)__cat(pstop_,name); \
} while (0)
#define SECTION(name) __attribute__((section("__TEXT, " #name)))
struct devtable **__start___devtable, **__stop___devtable;
#else
#define INIT_SECTION(name) /* no-op for ELF */
#define SECTION(name) __attribute__((section(#name)))
/* We construct a table of pointers in an ELF section (pointers generally
* go unpadded by gcc). ld creates boundary syms for us. */
extern struct devtable *__start___devtable[], *__stop___devtable[];
#endif /* __MACH__ */
#if !defined(__used)
# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
# define __used __attribute__((__unused__))
# else
# define __used __attribute__((__used__))
# endif
#endif
/* Define a variable f that holds the value of field f of struct devid
* based at address m.
*/
@ -110,16 +70,6 @@ extern struct devtable *__start___devtable[], *__stop___devtable[];
#define DEF_FIELD_ADDR(m, devid, f) \
DEF_FIELD_ADDR_VAR(m, devid, f, f)
/* Add a table entry. We test function type matches while we're here. */
#define ADD_TO_DEVTABLE(device_id, type, function) \
static struct devtable __cat(devtable,__LINE__) = { \
device_id + 0*sizeof((function)((const char *)NULL, \
(void *)NULL, \
(char *)NULL)), \
SIZE_##type, (function) }; \
static struct devtable *SECTION(__devtable) __used \
__cat(devtable_ptr,__LINE__) = &__cat(devtable,__LINE__)
#define ADD(str, sep, cond, field) \
do { \
strcat(str, sep); \
@ -439,7 +389,6 @@ static int do_hid_entry(const char *filename,
return 1;
}
ADD_TO_DEVTABLE("hid", hid_device_id, do_hid_entry);
/* Looks like: ieee1394:venNmoNspNverN */
static int do_ieee1394_entry(const char *filename,
@ -464,7 +413,6 @@ static int do_ieee1394_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ieee1394", ieee1394_device_id, do_ieee1394_entry);
/* Looks like: pci:vNdNsvNsdNbcNscNiN. */
static int do_pci_entry(const char *filename,
@ -508,7 +456,6 @@ static int do_pci_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("pci", pci_device_id, do_pci_entry);
/* looks like: "ccw:tNmNdtNdmN" */
static int do_ccw_entry(const char *filename,
@ -532,7 +479,6 @@ static int do_ccw_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ccw", ccw_device_id, do_ccw_entry);
/* looks like: "ap:tN" */
static int do_ap_entry(const char *filename,
@ -543,7 +489,6 @@ static int do_ap_entry(const char *filename,
sprintf(alias, "ap:t%02X*", dev_type);
return 1;
}
ADD_TO_DEVTABLE("ap", ap_device_id, do_ap_entry);
/* looks like: "css:tN" */
static int do_css_entry(const char *filename,
@ -554,7 +499,6 @@ static int do_css_entry(const char *filename,
sprintf(alias, "css:t%01X", type);
return 1;
}
ADD_TO_DEVTABLE("css", css_device_id, do_css_entry);
/* Looks like: "serio:tyNprNidNexN" */
static int do_serio_entry(const char *filename,
@ -574,7 +518,6 @@ static int do_serio_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("serio", serio_device_id, do_serio_entry);
/* looks like: "acpi:ACPI0003" or "acpi:PNP0C0B" or "acpi:LNXVIDEO" or
* "acpi:bbsspp" (bb=base-class, ss=sub-class, pp=prog-if)
@ -612,7 +555,6 @@ static int do_acpi_entry(const char *filename,
}
return 1;
}
ADD_TO_DEVTABLE("acpi", acpi_device_id, do_acpi_entry);
/* looks like: "pnp:dD" */
static void do_pnp_device_entry(void *symval, unsigned long size,
@ -736,7 +678,6 @@ static int do_pcmcia_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("pcmcia", pcmcia_device_id, do_pcmcia_entry);
static int do_vio_entry(const char *filename, void *symval,
char *alias)
@ -756,7 +697,6 @@ static int do_vio_entry(const char *filename, void *symval,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("vio", vio_device_id, do_vio_entry);
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
@ -829,7 +769,6 @@ static int do_input_entry(const char *filename, void *symval,
do_input(alias, *swbit, 0, INPUT_DEVICE_ID_SW_MAX);
return 1;
}
ADD_TO_DEVTABLE("input", input_device_id, do_input_entry);
static int do_eisa_entry(const char *filename, void *symval,
char *alias)
@ -841,7 +780,6 @@ static int do_eisa_entry(const char *filename, void *symval,
strcat(alias, "*");
return 1;
}
ADD_TO_DEVTABLE("eisa", eisa_device_id, do_eisa_entry);
/* Looks like: parisc:tNhvNrevNsvN */
static int do_parisc_entry(const char *filename, void *symval,
@ -861,7 +799,6 @@ static int do_parisc_entry(const char *filename, void *symval,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("parisc", parisc_device_id, do_parisc_entry);
/* Looks like: sdio:cNvNdN. */
static int do_sdio_entry(const char *filename,
@ -878,7 +815,6 @@ static int do_sdio_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("sdio", sdio_device_id, do_sdio_entry);
/* Looks like: ssb:vNidNrevN. */
static int do_ssb_entry(const char *filename,
@ -895,7 +831,6 @@ static int do_ssb_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ssb", ssb_device_id, do_ssb_entry);
/* Looks like: bcma:mNidNrevNclN. */
static int do_bcma_entry(const char *filename,
@ -914,7 +849,6 @@ static int do_bcma_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("bcma", bcma_device_id, do_bcma_entry);
/* Looks like: virtio:dNvN */
static int do_virtio_entry(const char *filename, void *symval,
@ -930,7 +864,6 @@ static int do_virtio_entry(const char *filename, void *symval,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("virtio", virtio_device_id, do_virtio_entry);
/*
* Looks like: vmbus:guid
@ -953,7 +886,6 @@ static int do_vmbus_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("vmbus", hv_vmbus_device_id, do_vmbus_entry);
/* Looks like: rpmsg:S */
static int do_rpmsg_entry(const char *filename, void *symval,
@ -964,7 +896,6 @@ static int do_rpmsg_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("rpmsg", rpmsg_device_id, do_rpmsg_entry);
/* Looks like: i2c:S */
static int do_i2c_entry(const char *filename, void *symval,
@ -975,7 +906,6 @@ static int do_i2c_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("i2c", i2c_device_id, do_i2c_entry);
/* Looks like: spi:S */
static int do_spi_entry(const char *filename, void *symval,
@ -986,7 +916,6 @@ static int do_spi_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("spi", spi_device_id, do_spi_entry);
static const struct dmifield {
const char *prefix;
@ -1041,7 +970,6 @@ static int do_dmi_entry(const char *filename, void *symval,
strcat(alias, ":");
return 1;
}
ADD_TO_DEVTABLE("dmi", dmi_system_id, do_dmi_entry);
static int do_platform_entry(const char *filename,
void *symval, char *alias)
@ -1050,7 +978,6 @@ static int do_platform_entry(const char *filename,
sprintf(alias, PLATFORM_MODULE_PREFIX "%s", *name);
return 1;
}
ADD_TO_DEVTABLE("platform", platform_device_id, do_platform_entry);
static int do_mdio_entry(const char *filename,
void *symval, char *alias)
@ -1075,7 +1002,6 @@ static int do_mdio_entry(const char *filename,
return 1;
}
ADD_TO_DEVTABLE("mdio", mdio_device_id, do_mdio_entry);
/* Looks like: zorro:iN. */
static int do_zorro_entry(const char *filename, void *symval,
@ -1086,7 +1012,6 @@ static int do_zorro_entry(const char *filename, void *symval,
ADD(alias, "i", id != ZORRO_WILDCARD, id);
return 1;
}
ADD_TO_DEVTABLE("zorro", zorro_device_id, do_zorro_entry);
/* looks like: "pnp:dD" */
static int do_isapnp_entry(const char *filename,
@ -1102,7 +1027,6 @@ static int do_isapnp_entry(const char *filename,
(function >> 12) & 0x0f, (function >> 8) & 0x0f);
return 1;
}
ADD_TO_DEVTABLE("isapnp", isapnp_device_id, do_isapnp_entry);
/* Looks like: "ipack:fNvNdN". */
static int do_ipack_entry(const char *filename,
@ -1118,7 +1042,6 @@ static int do_ipack_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("ipack", ipack_device_id, do_ipack_entry);
/*
* Append a match expression for a single masked hex digit.
@ -1189,7 +1112,6 @@ static int do_amba_entry(const char *filename,
return 1;
}
ADD_TO_DEVTABLE("amba", amba_id, do_amba_entry);
/*
* looks like: "mipscdmm:tN"
@ -1205,7 +1127,6 @@ static int do_mips_cdmm_entry(const char *filename,
sprintf(alias, "mipscdmm:t%02X*", type);
return 1;
}
ADD_TO_DEVTABLE("mipscdmm", mips_cdmm_device_id, do_mips_cdmm_entry);
/* LOOKS like cpu:type:x86,venVVVVfamFFFFmodMMMM:feature:*,FEAT,*
* All fields are numbers. It would be nicer to use strings for vendor
@ -1230,7 +1151,6 @@ static int do_x86cpu_entry(const char *filename, void *symval,
sprintf(alias + strlen(alias), "%04X*", feature);
return 1;
}
ADD_TO_DEVTABLE("x86cpu", x86_cpu_id, do_x86cpu_entry);
/* LOOKS like cpu:type:*:feature:*FEAT* */
static int do_cpu_entry(const char *filename, void *symval, char *alias)
@ -1240,7 +1160,6 @@ static int do_cpu_entry(const char *filename, void *symval, char *alias)
sprintf(alias, "cpu:type:*:feature:*%04X*", feature);
return 1;
}
ADD_TO_DEVTABLE("cpu", cpu_feature, do_cpu_entry);
/* Looks like: mei:S:uuid:N:* */
static int do_mei_entry(const char *filename, void *symval,
@ -1259,7 +1178,6 @@ static int do_mei_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("mei", mei_cl_device_id, do_mei_entry);
/* Looks like: rapidio:vNdNavNadN */
static int do_rio_entry(const char *filename,
@ -1279,7 +1197,6 @@ static int do_rio_entry(const char *filename,
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry);
/* Looks like: ulpi:vNpN */
static int do_ulpi_entry(const char *filename, void *symval,
@ -1292,7 +1209,6 @@ static int do_ulpi_entry(const char *filename, void *symval,
return 1;
}
ADD_TO_DEVTABLE("ulpi", ulpi_device_id, do_ulpi_entry);
/* Looks like: hdaudio:vNrNaN */
static int do_hda_entry(const char *filename, void *symval, char *alias)
@ -1309,7 +1225,6 @@ static int do_hda_entry(const char *filename, void *symval, char *alias)
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("hdaudio", hda_device_id, do_hda_entry);
/* Looks like: sdw:mNpN */
static int do_sdw_entry(const char *filename, void *symval, char *alias)
@ -1324,7 +1239,6 @@ static int do_sdw_entry(const char *filename, void *symval, char *alias)
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("sdw", sdw_device_id, do_sdw_entry);
/* Looks like: fsl-mc:vNdN */
static int do_fsl_mc_entry(const char *filename, void *symval,
@ -1336,7 +1250,6 @@ static int do_fsl_mc_entry(const char *filename, void *symval,
sprintf(alias, "fsl-mc:v%08Xd%s", vendor, *obj_type);
return 1;
}
ADD_TO_DEVTABLE("fslmc", fsl_mc_device_id, do_fsl_mc_entry);
/* Looks like: tbsvc:kSpNvNrN */
static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
@ -1361,7 +1274,6 @@ static int do_tbsvc_entry(const char *filename, void *symval, char *alias)
add_wildcard(alias);
return 1;
}
ADD_TO_DEVTABLE("tbsvc", tb_service_id, do_tbsvc_entry);
/* Looks like: typec:idNmN */
static int do_typec_entry(const char *filename, void *symval, char *alias)
@ -1374,7 +1286,6 @@ static int do_typec_entry(const char *filename, void *symval, char *alias)
return 1;
}
ADD_TO_DEVTABLE("typec", typec_device_id, do_typec_entry);
/* Does namelen bytes of name exactly match the symbol? */
static bool sym_is(const char *name, unsigned namelen, const char *symbol)
@ -1388,12 +1299,11 @@ static bool sym_is(const char *name, unsigned namelen, const char *symbol)
static void do_table(void *symval, unsigned long size,
unsigned long id_size,
const char *device_id,
void *function,
int (*do_entry)(const char *filename, void *symval, char *alias),
struct module *mod)
{
unsigned int i;
char alias[500];
int (*do_entry)(const char *, void *entry, char *alias) = function;
device_id_check(mod->name, device_id, size, id_size, symval);
/* Leave last one: it's the terminator. */
@ -1407,6 +1317,48 @@ static void do_table(void *symval, unsigned long size,
}
}
static const struct devtable devtable[] = {
{"hid", SIZE_hid_device_id, do_hid_entry},
{"ieee1394", SIZE_ieee1394_device_id, do_ieee1394_entry},
{"pci", SIZE_pci_device_id, do_pci_entry},
{"ccw", SIZE_ccw_device_id, do_ccw_entry},
{"ap", SIZE_ap_device_id, do_ap_entry},
{"css", SIZE_css_device_id, do_css_entry},
{"serio", SIZE_serio_device_id, do_serio_entry},
{"acpi", SIZE_acpi_device_id, do_acpi_entry},
{"pcmcia", SIZE_pcmcia_device_id, do_pcmcia_entry},
{"vio", SIZE_vio_device_id, do_vio_entry},
{"input", SIZE_input_device_id, do_input_entry},
{"eisa", SIZE_eisa_device_id, do_eisa_entry},
{"parisc", SIZE_parisc_device_id, do_parisc_entry},
{"sdio", SIZE_sdio_device_id, do_sdio_entry},
{"ssb", SIZE_ssb_device_id, do_ssb_entry},
{"bcma", SIZE_bcma_device_id, do_bcma_entry},
{"virtio", SIZE_virtio_device_id, do_virtio_entry},
{"vmbus", SIZE_hv_vmbus_device_id, do_vmbus_entry},
{"rpmsg", SIZE_rpmsg_device_id, do_rpmsg_entry},
{"i2c", SIZE_i2c_device_id, do_i2c_entry},
{"spi", SIZE_spi_device_id, do_spi_entry},
{"dmi", SIZE_dmi_system_id, do_dmi_entry},
{"platform", SIZE_platform_device_id, do_platform_entry},
{"mdio", SIZE_mdio_device_id, do_mdio_entry},
{"zorro", SIZE_zorro_device_id, do_zorro_entry},
{"isapnp", SIZE_isapnp_device_id, do_isapnp_entry},
{"ipack", SIZE_ipack_device_id, do_ipack_entry},
{"amba", SIZE_amba_id, do_amba_entry},
{"mipscdmm", SIZE_mips_cdmm_device_id, do_mips_cdmm_entry},
{"x86cpu", SIZE_x86_cpu_id, do_x86cpu_entry},
{"cpu", SIZE_cpu_feature, do_cpu_entry},
{"mei", SIZE_mei_cl_device_id, do_mei_entry},
{"rapidio", SIZE_rio_device_id, do_rio_entry},
{"ulpi", SIZE_ulpi_device_id, do_ulpi_entry},
{"hdaudio", SIZE_hda_device_id, do_hda_entry},
{"sdw", SIZE_sdw_device_id, do_sdw_entry},
{"fslmc", SIZE_fsl_mc_device_id, do_fsl_mc_entry},
{"tbsvc", SIZE_tb_service_id, do_tbsvc_entry},
{"typec", SIZE_typec_device_id, do_typec_entry},
};
/* Create MODULE_ALIAS() statements.
* At this time, we cannot write the actual output C source yet,
* so we write into the mod->dev_table_buf buffer. */
@ -1460,13 +1412,14 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
else if (sym_is(name, namelen, "pnp_card"))
do_pnp_card_entries(symval, sym->st_size, mod);
else {
struct devtable **p;
INIT_SECTION(__devtable);
int i;
for (p = __start___devtable; p < __stop___devtable; p++) {
if (sym_is(name, namelen, (*p)->device_id)) {
do_table(symval, sym->st_size, (*p)->id_size,
(*p)->device_id, (*p)->function, mod);
for (i = 0; i < ARRAY_SIZE(devtable); i++) {
const struct devtable *p = &devtable[i];
if (sym_is(name, namelen, p->device_id)) {
do_table(symval, sym->st_size, p->id_size,
p->device_id, p->do_entry, mod);
break;
}
}

114
scripts/mod/modpost.c
View file

@ -1163,6 +1163,14 @@ static const struct sectioncheck *section_mismatch(
* fromsec = text section
* refsymname = *.constprop.*
*
* Pattern 6:
* Hide section mismatch warnings for ELF local symbols. The goal
* is to eliminate false positive modpost warnings caused by
* compiler-generated ELF local symbol names such as ".LANCHOR1".
* Autogenerated symbol names bypass modpost's "Pattern 2"
* whitelisting, which relies on pattern-matching against symbol
* names to work. (One situation where gcc can autogenerate ELF
* local symbols is when "-fsection-anchors" is used.)
**/
static int secref_whitelist(const struct sectioncheck *mismatch,
const char *fromsec, const char *fromsym,
@ -1201,9 +1209,37 @@ static int secref_whitelist(const struct sectioncheck *mismatch,
match(fromsym, optim_symbols))
return 0;
/* Check for pattern 6 */
if (strstarts(fromsym, ".L"))
return 0;
return 1;
}
static inline int is_arm_mapping_symbol(const char *str)
{
return str[0] == '$' && strchr("axtd", str[1])
&& (str[2] == '\0' || str[2] == '.');
}
/*
* If there's no name there, ignore it; likewise, ignore it if it's
* one of the magic symbols emitted used by current ARM tools.
*
* Otherwise if find_symbols_between() returns those symbols, they'll
* fail the whitelist tests and cause lots of false alarms ... fixable
* only by merging __exit and __init sections into __text, bloating
* the kernel (which is especially evil on embedded platforms).
*/
static inline int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
{
const char *name = elf->strtab + sym->st_name;
if (!name || !strlen(name))
return 0;
return !is_arm_mapping_symbol(name);
}
/**
* Find symbol based on relocation record info.
* In some cases the symbol supplied is a valid symbol so
@ -1229,6 +1265,8 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
continue;
if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
continue;
if (!is_valid_name(elf, sym))
continue;
if (sym->st_value == addr)
return sym;
/* Find a symbol nearby - addr are maybe negative */
@ -1247,30 +1285,6 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
return NULL;
}
static inline int is_arm_mapping_symbol(const char *str)
{
return str[0] == '$' && strchr("axtd", str[1])
&& (str[2] == '\0' || str[2] == '.');
}
/*
* If there's no name there, ignore it; likewise, ignore it if it's
* one of the magic symbols emitted used by current ARM 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 int is_valid_name(struct elf_info *elf, Elf_Sym *sym)
{
const char *name = elf->strtab + sym->st_name;
if (!name || !strlen(name))
return 0;
return !is_arm_mapping_symbol(name);
}
/*
* Find symbols before or equal addr and after addr - in the section sec.
* If we find two symbols with equal offset prefer one with a valid name.
@ -2083,15 +2097,27 @@ static void check_for_unused(enum export exp, const char *m, const char *s)
}
}
static void check_exports(struct module *mod)
static int check_exports(struct module *mod)
{
struct symbol *s, *exp;
int err = 0;
for (s = mod->unres; s; s = s->next) {
const char *basename;
exp = find_symbol(s->name);
if (!exp || exp->module == mod)
if (!exp || exp->module == mod) {
if (have_vmlinux && !s->weak) {
if (warn_unresolved) {
warn("\"%s\" [%s.ko] undefined!\n",
s->name, mod->name);
} else {
merror("\"%s\" [%s.ko] undefined!\n",
s->name, mod->name);
err = 1;
}
}
continue;
}
basename = strrchr(mod->name, '/');
if (basename)
basename++;
@ -2101,6 +2127,8 @@ static void check_exports(struct module *mod)
check_for_gpl_usage(exp->export, basename, exp->name);
check_for_unused(exp->export, basename, exp->name);
}
return err;
}
static int check_modname_len(struct module *mod)
@ -2178,19 +2206,8 @@ static int add_versions(struct buffer *b, struct module *mod)
for (s = mod->unres; s; s = s->next) {
exp = find_symbol(s->name);
if (!exp || exp->module == mod) {
if (have_vmlinux && !s->weak) {
if (warn_unresolved) {
warn("\"%s\" [%s.ko] undefined!\n",
s->name, mod->name);
} else {
merror("\"%s\" [%s.ko] undefined!\n",
s->name, mod->name);
err = 1;
}
}
if (!exp || exp->module == mod)
continue;
}
s->module = exp->module;
s->crc_valid = exp->crc_valid;
s->crc = exp->crc;
@ -2227,15 +2244,15 @@ static int add_versions(struct buffer *b, struct module *mod)
return err;
}
static void add_depends(struct buffer *b, struct module *mod,
struct module *modules)
static void add_depends(struct buffer *b, struct module *mod)
{
struct symbol *s;
struct module *m;
int first = 1;
for (m = modules; m; m = m->next)
m->seen = is_vmlinux(m->name);
/* Clear ->seen flag of modules that own symbols needed by this. */
for (s = mod->unres; s; s = s->next)
if (s->module)
s->module->seen = is_vmlinux(s->module->name);
buf_printf(b, "\n");
buf_printf(b, "static const char __module_depends[]\n");
@ -2416,7 +2433,7 @@ int main(int argc, char **argv)
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;
while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awM:K:E")) != -1) {
while ((opt = getopt(argc, argv, "i:I:e:mnsST:o:awE")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@ -2482,12 +2499,6 @@ int main(int argc, char **argv)
if (files_source)
read_symbols_from_files(files_source);
for (mod = modules; mod; mod = mod->next) {
if (mod->skip)
continue;
check_exports(mod);
}
err = 0;
for (mod = modules; mod; mod = mod->next) {
@ -2499,12 +2510,13 @@ int main(int argc, char **argv)
buf.pos = 0;
err |= check_modname_len(mod);
err |= check_exports(mod);
add_header(&buf, mod);
add_intree_flag(&buf, !external_module);
add_retpoline(&buf);
add_staging_flag(&buf, mod->name);
err |= add_versions(&buf, mod);
add_depends(&buf, mod, modules);
add_depends(&buf, mod);
add_moddevtable(&buf, mod);
add_srcversion(&buf, mod);

1
scripts/package/Makefile
View file

@ -33,7 +33,6 @@ MKSPEC := $(srctree)/scripts/package/mkspec
quiet_cmd_src_tar = TAR $(2).tar.gz
cmd_src_tar = \
set -e; \
if test "$(objtree)" != "$(srctree)"; then \
echo >&2; \
echo >&2 " ERROR:"; \

12
scripts/setlocalversion
View file

@ -73,8 +73,16 @@ scm_version()
printf -- '-svn%s' "`git svn find-rev $head`"
fi
# Check for uncommitted changes
if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
# Check for uncommitted changes.
# First, with git-status, but --no-optional-locks is only
# supported in git >= 2.14, so fall back to git-diff-index if
# it fails. Note that git-diff-index does not refresh the
# index, so it may give misleading results. See
# git-update-index(1), git-diff-index(1), and git-status(1).
if {
git --no-optional-locks status -uno --porcelain 2>/dev/null ||
git diff-index --name-only HEAD
} | grep -qvE '^(.. )?scripts/package'; then
printf '%s' -dirty
fi

4
usr/Makefile
View file

@ -49,10 +49,10 @@ $(deps_initramfs): ;
$(deps_initramfs): klibcdirs
# We rebuild initramfs_data.cpio if:
# 1) Any included file is newer then initramfs_data.cpio
# 1) Any included file is newer than initramfs_data.cpio
# 2) There are changes in which files are included (added or deleted)
# 3) If gen_init_cpio are newer than initramfs_data.cpio
# 4) arguments to gen_initramfs.sh changes
# 4) Arguments to gen_initramfs.sh changes
$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y)
$(call if_changed,initfs)