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Kbuild updates for v6.1

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- Remove potentially incomplete targets when Kbuid is interrupted by
    SIGINT etc. in case GNU Make may miss to do that when stderr is piped
    to another program.
 
  - Rewrite the single target build so it works more correctly.
 
  - Fix rpm-pkg builds with V=1.
 
  - List top-level subdirectories in ./Kbuild.
 
  - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in kallsyms.
 
  - Avoid two different modules in lib/zstd/ having shared code, which
    potentially causes building the common code as build-in and modular
    back-and-forth.
 
  - Unify two modpost invocations to optimize the build process.
 
  - Remove head-y syntax in favor of linker scripts for placing particular
    sections in the head of vmlinux.
 
  - Bump the minimal GNU Make version to 3.82.
 
  - Clean up misc Makefiles and scripts.
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Merge tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Remove potentially incomplete targets when Kbuid is interrupted by
   SIGINT etc in case GNU Make may miss to do that when stderr is piped
   to another program.

 - Rewrite the single target build so it works more correctly.

 - Fix rpm-pkg builds with V=1.

 - List top-level subdirectories in ./Kbuild.

 - Ignore auto-generated __kstrtab_* and __kstrtabns_* symbols in
   kallsyms.

 - Avoid two different modules in lib/zstd/ having shared code, which
   potentially causes building the common code as build-in and modular
   back-and-forth.

 - Unify two modpost invocations to optimize the build process.

 - Remove head-y syntax in favor of linker scripts for placing
   particular sections in the head of vmlinux.

 - Bump the minimal GNU Make version to 3.82.

 - Clean up misc Makefiles and scripts.

* tag 'kbuild-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (41 commits)
  docs: bump minimal GNU Make version to 3.82
  ia64: simplify esi object addition in Makefile
  Revert "kbuild: Check if linker supports the -X option"
  kbuild: rebuild .vmlinux.export.o when its prerequisite is updated
  kbuild: move modules.builtin(.modinfo) rules to Makefile.vmlinux_o
  zstd: Fixing mixed module-builtin objects
  kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols
  kallsyms: take the input file instead of reading stdin
  kallsyms: drop duplicated ignore patterns from kallsyms.c
  kbuild: reuse mksysmap output for kallsyms
  mksysmap: update comment about __crc_*
  kbuild: remove head-y syntax
  kbuild: use obj-y instead extra-y for objects placed at the head
  kbuild: hide error checker logs for V=1 builds
  kbuild: re-run modpost when it is updated
  kbuild: unify two modpost invocations
  kbuild: move vmlinux.o rule to the top Makefile
  kbuild: move .vmlinux.objs rule to Makefile.modpost
  kbuild: list sub-directories in ./Kbuild
  Makefile.compiler: replace cc-ifversion with compiler-specific macros
  ...
This commit is contained in:
Linus Torvalds 2022-10-10 12:00:45 -07:00
commit 8afc66e8d4
87 changed files with 723 additions and 757 deletions

56
Documentation/kbuild/makefiles.rst
View file

@ -341,19 +341,7 @@ more details, with real examples.
Examples are:
1) head objects
Some objects must be placed at the head of vmlinux. They are
directly linked to vmlinux without going through built-in.a
A typical use-case is an object that contains the entry point.
arch/$(SRCARCH)/Makefile should specify such objects as head-y.
Discussion:
Given that we can control the section order in the linker script,
why do we need head-y?
2) vmlinux linker script
1) vmlinux linker script
The linker script for vmlinux is located at
arch/$(SRCARCH)/kernel/vmlinux.lds
@ -361,10 +349,6 @@ more details, with real examples.
Example::
# arch/x86/kernel/Makefile
extra-y := head_$(BITS).o
extra-y += head$(BITS).o
extra-y += ebda.o
extra-y += platform-quirks.o
extra-y += vmlinux.lds
$(extra-y) should only contain targets needed for vmlinux.
@ -683,22 +667,27 @@ more details, with real examples.
In the above example, -Wno-unused-but-set-variable will be added to
KBUILD_CFLAGS only if gcc really accepts it.
cc-ifversion
cc-ifversion tests the version of $(CC) and equals the fourth parameter
if version expression is true, or the fifth (if given) if the version
expression is false.
gcc-min-version
gcc-min-version tests if the value of $(CONFIG_GCC_VERSION) is greater than
or equal to the provided value and evaluates to y if so.
Example::
#fs/reiserfs/Makefile
ccflags-y := $(call cc-ifversion, -lt, 0402, -O1)
cflags-$(call gcc-min-version, 70100) := -foo
In this example, ccflags-y will be assigned the value -O1 if the
$(CC) version is less than 4.2.
cc-ifversion takes all the shell operators:
-eq, -ne, -lt, -le, -gt, and -ge
The third parameter may be a text as in this example, but it may also
be an expanded variable or a macro.
In this example, cflags-y will be assigned the value -foo if $(CC) is gcc and
$(CONFIG_GCC_VERSION) is >= 7.1.
clang-min-version
clang-min-version tests if the value of $(CONFIG_CLANG_VERSION) is greater
than or equal to the provided value and evaluates to y if so.
Example::
cflags-$(call clang-min-version, 110000) := -foo
In this example, cflags-y will be assigned the value -foo if $(CC) is clang
and $(CONFIG_CLANG_VERSION) is >= 11.0.0.
cc-cross-prefix
cc-cross-prefix is used to check if there exists a $(CC) in path with
@ -1099,8 +1088,7 @@ When kbuild executes, the following steps are followed (roughly):
- The values of the above variables are expanded in arch/$(SRCARCH)/Makefile.
5) All object files are then linked and the resulting file vmlinux is
located at the root of the obj tree.
The very first objects linked are listed in head-y, assigned by
arch/$(SRCARCH)/Makefile.
The very first objects linked are listed in scripts/head-object-list.txt.
6) Finally, the architecture-specific part does any required post processing
and builds the final bootimage.
- This includes building boot records
@ -1272,6 +1260,9 @@ When kbuild executes, the following steps are followed (roughly):
All object files for vmlinux. They are linked to vmlinux in the same
order as listed in KBUILD_VMLINUX_OBJS.
The objects listed in scripts/head-object-list.txt are exceptions;
they are placed before the other objects.
KBUILD_VMLINUX_LIBS
All .a "lib" files for vmlinux. KBUILD_VMLINUX_OBJS and
@ -1315,8 +1306,7 @@ When kbuild executes, the following steps are followed (roughly):
machinery is all architecture-independent.
head-y, core-y, libs-y, drivers-y
$(head-y) lists objects to be linked first in vmlinux.
core-y, libs-y, drivers-y
$(libs-y) lists directories where a lib.a archive can be located.

4
Documentation/process/changes.rst
View file

@ -33,7 +33,7 @@ GNU C 5.1 gcc --version
Clang/LLVM (optional) 11.0.0 clang --version
Rust (optional) 1.62.0 rustc --version
bindgen (optional) 0.56.0 bindgen --version
GNU make 3.81 make --version
GNU make 3.82 make --version
bash 4.2 bash --version
binutils 2.23 ld -v
flex 2.5.35 flex --version
@ -108,7 +108,7 @@ It depends on ``libclang``.
Make
----
You will need GNU make 3.81 or later to build the kernel.
You will need GNU make 3.82 or later to build the kernel.
Bash
----

72
Kbuild
View file

@ -2,18 +2,18 @@
#
# Kbuild for top-level directory of the kernel
#####
# Prepare global headers and check sanity before descending into sub-directories
# ---------------------------------------------------------------------------
# Generate bounds.h
bounds-file := include/generated/bounds.h
always-y := $(bounds-file)
targets := kernel/bounds.s
$(bounds-file): kernel/bounds.s FORCE
$(call filechk,offsets,__LINUX_BOUNDS_H__)
#####
# Generate timeconst.h
timeconst-file := include/generated/timeconst.h
@ -23,12 +23,10 @@ filechk_gentimeconst = echo $(CONFIG_HZ) | bc -q $<
$(timeconst-file): kernel/time/timeconst.bc FORCE
$(call filechk,gentimeconst)
#####
# Generate asm-offsets.h
offsets-file := include/generated/asm-offsets.h
always-y += $(offsets-file)
targets += arch/$(SRCARCH)/kernel/asm-offsets.s
arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
@ -36,24 +34,66 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: $(timeconst-file) $(bounds-file)
$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
$(call filechk,offsets,__ASM_OFFSETS_H__)
#####
# Check for missing system calls
always-y += missing-syscalls
quiet_cmd_syscalls = CALL $<
cmd_syscalls = $(CONFIG_SHELL) $< $(CC) $(c_flags) $(missing_syscalls_flags)
missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
PHONY += missing-syscalls
missing-syscalls: scripts/checksyscalls.sh $(offsets-file)
$(call cmd,syscalls)
#####
# Check atomic headers are up-to-date
# Check the manual modification of atomic headers
always-y += old-atomics
quiet_cmd_check_sha1 = CHKSHA1 $<
cmd_check_sha1 = \
if ! command -v sha1sum >/dev/null; then \
echo "warning: cannot check the header due to sha1sum missing"; \
exit 0; \
fi; \
if [ "$$(sed -n '$$s:// ::p' $<)" != \
"$$(sed '$$d' $< | sha1sum | sed 's/ .*//')" ]; then \
echo "error: $< has been modified." >&2; \
exit 1; \
fi; \
touch $@
quiet_cmd_atomics = CALL $<
cmd_atomics = $(CONFIG_SHELL) $<
atomic-checks += $(addprefix $(obj)/.checked-, \
atomic-arch-fallback.h \
atomic-instrumented.h \
atomic-long.h)
old-atomics: scripts/atomic/check-atomics.sh FORCE
$(call cmd,atomics)
targets += $(atomic-checks)
$(atomic-checks): $(obj)/.checked-%: include/linux/atomic/% FORCE
$(call if_changed,check_sha1)
# A phony target that depends on all the preparation targets
PHONY += prepare
prepare: $(offsets-file) missing-syscalls $(atomic-checks)
@:
# Ordinary directory descending
# ---------------------------------------------------------------------------
obj-y += init/
obj-y += usr/
obj-y += arch/$(SRCARCH)/
obj-y += $(ARCH_CORE)
obj-y += kernel/
obj-y += certs/
obj-y += mm/
obj-y += fs/
obj-y += ipc/
obj-y += security/
obj-y += crypto/
obj-$(CONFIG_BLOCK) += block/
obj-$(CONFIG_IO_URING) += io_uring/
obj-$(CONFIG_RUST) += rust/
obj-y += $(ARCH_LIB)
obj-y += drivers/
obj-y += sound/
obj-$(CONFIG_SAMPLES) += samples/
obj-$(CONFIG_NET) += net/
obj-y += virt/
obj-y += $(ARCH_DRIVERS)

184
Makefile
View file

@ -538,7 +538,7 @@ LDFLAGS_MODULE =
CFLAGS_KERNEL =
RUSTFLAGS_KERNEL =
AFLAGS_KERNEL =
LDFLAGS_vmlinux =
export LDFLAGS_vmlinux =
# Use USERINCLUDE when you must reference the UAPI directories only.
USERINCLUDE := \
@ -648,7 +648,7 @@ quiet_cmd_makefile = GEN Makefile
} > Makefile
outputmakefile:
$(Q)if [ -f $(srctree)/.config -o \
@if [ -f $(srctree)/.config -o \
-d $(srctree)/include/config -o \
-d $(srctree)/arch/$(SRCARCH)/include/generated ]; then \
echo >&2 "***"; \
@ -710,6 +710,8 @@ else
__all: modules
endif
targets :=
# Decide whether to build built-in, modular, or both.
# Normally, just do built-in.
@ -741,11 +743,8 @@ endif
ifeq ($(KBUILD_EXTMOD),)
# Objects we will link into vmlinux / subdirs we need to visit
core-y := init/ usr/ arch/$(SRCARCH)/
drivers-y := drivers/ sound/
drivers-$(CONFIG_SAMPLES) += samples/
drivers-$(CONFIG_NET) += net/
drivers-y += virt/
core-y :=
drivers-y :=
libs-y := lib/
endif # KBUILD_EXTMOD
@ -804,7 +803,7 @@ else # !may-sync-config
PHONY += include/config/auto.conf
include/config/auto.conf:
$(Q)test -e include/generated/autoconf.h -a -e $@ || ( \
@test -e include/generated/autoconf.h -a -e $@ || ( \
echo >&2; \
echo >&2 " ERROR: Kernel configuration is invalid."; \
echo >&2 " include/generated/autoconf.h or $@ are missing.";\
@ -862,7 +861,6 @@ KBUILD_CFLAGS += $(stackp-flags-y)
KBUILD_CFLAGS-$(CONFIG_WERROR) += -Werror
KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
KBUILD_RUSTFLAGS-$(CONFIG_WERROR) += -Dwarnings
KBUILD_RUSTFLAGS += $(KBUILD_RUSTFLAGS-y)
@ -1041,7 +1039,6 @@ ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -Wno-maybe-uninitialized
endif
ifdef CONFIG_CC_IS_GCC
# The allocators already balk at large sizes, so silence the compiler
# warnings for bounds checks involving those possible values. While
# -Wno-alloc-size-larger-than would normally be used here, earlier versions
@ -1053,8 +1050,8 @@ ifdef CONFIG_CC_IS_GCC
# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
# choice, we must perform a versioned check to disable this warning.
# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0901, -Wno-alloc-size-larger-than)
endif
KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than
KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
# disable invalid "can't wrap" optimizations for signed / pointers
KBUILD_CFLAGS += -fno-strict-overflow
@ -1110,7 +1107,7 @@ KBUILD_LDFLAGS += $(call ld-option,--no-warn-rwx-segments)
endif
ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
LDFLAGS_vmlinux += $(call ld-option, -X,)
LDFLAGS_vmlinux += -X
endif
ifeq ($(CONFIG_RELR),y)
@ -1171,41 +1168,27 @@ export MODORDER := $(extmod_prefix)modules.order
export MODULES_NSDEPS := $(extmod_prefix)modules.nsdeps
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ certs/ mm/ fs/ ipc/ security/ crypto/
core-$(CONFIG_BLOCK) += block/
core-$(CONFIG_IO_URING) += io_uring/
core-$(CONFIG_RUST) += rust/
vmlinux-dirs := $(patsubst %/,%,$(filter %/, \
$(core-y) $(core-m) $(drivers-y) $(drivers-m) \
$(libs-y) $(libs-m)))
vmlinux-alldirs := $(sort $(vmlinux-dirs) Documentation \
build-dir := .
clean-dirs := $(sort . Documentation \
$(patsubst %/,%,$(filter %/, $(core-) \
$(drivers-) $(libs-))))
build-dirs := $(vmlinux-dirs)
clean-dirs := $(vmlinux-alldirs)
subdir-modorder := $(addsuffix /modules.order, $(build-dirs))
export ARCH_CORE := $(core-y)
export ARCH_LIB := $(filter %/, $(libs-y))
export ARCH_DRIVERS := $(drivers-y) $(drivers-m)
# Externally visible symbols (used by link-vmlinux.sh)
KBUILD_VMLINUX_OBJS := $(head-y) $(patsubst %/,%/built-in.a, $(core-y))
KBUILD_VMLINUX_OBJS += $(addsuffix built-in.a, $(filter %/, $(libs-y)))
KBUILD_VMLINUX_OBJS := ./built-in.a
ifdef CONFIG_MODULES
KBUILD_VMLINUX_OBJS += $(patsubst %/, %/lib.a, $(filter %/, $(libs-y)))
KBUILD_VMLINUX_LIBS := $(filter-out %/, $(libs-y))
else
KBUILD_VMLINUX_LIBS := $(patsubst %/,%/lib.a, $(libs-y))
endif
KBUILD_VMLINUX_OBJS += $(patsubst %/,%/built-in.a, $(drivers-y))
export KBUILD_VMLINUX_OBJS KBUILD_VMLINUX_LIBS
export KBUILD_VMLINUX_LIBS
export KBUILD_LDS := arch/$(SRCARCH)/kernel/vmlinux.lds
# used by scripts/Makefile.package
export KBUILD_ALLDIRS := $(sort $(filter-out arch/%,$(vmlinux-alldirs)) LICENSES arch include scripts tools)
vmlinux-deps := $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)
# Recurse until adjust_autoksyms.sh is satisfied
PHONY += autoksyms_recursive
@ -1215,7 +1198,7 @@ ifdef CONFIG_TRIM_UNUSED_KSYMS
# (this can be evaluated only once include/config/auto.conf has been included)
KBUILD_MODULES := 1
autoksyms_recursive: descend modules.order
autoksyms_recursive: $(build-dir) modules.order
$(Q)$(CONFIG_SHELL) $(srctree)/scripts/adjust_autoksyms.sh \
"$(MAKE) -f $(srctree)/Makefile autoksyms_recursive"
endif
@ -1229,21 +1212,31 @@ quiet_cmd_autoksyms_h = GEN $@
$(autoksyms_h):
$(call cmd,autoksyms_h)
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
# '$(AR) mPi' needs 'T' to workaround the bug of llvm-ar <= 14
quiet_cmd_ar_vmlinux.a = AR $@
cmd_ar_vmlinux.a = \
rm -f $@; \
$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
$(AR) mPiT $$($(AR) t $@ | head -n1) $@ $$($(AR) t $@ | grep -F --file=$(srctree)/scripts/head-object-list.txt)
# Final link of vmlinux with optional arch pass after final link
cmd_link-vmlinux = \
$(CONFIG_SHELL) $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
targets += vmlinux.a
vmlinux.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt autoksyms_recursive FORCE
$(call if_changed,ar_vmlinux.a)
vmlinux: scripts/link-vmlinux.sh autoksyms_recursive $(vmlinux-deps) FORCE
+$(call if_changed_dep,link-vmlinux)
PHONY += vmlinux_o
vmlinux_o: vmlinux.a $(KBUILD_VMLINUX_LIBS)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux_o
targets := vmlinux
vmlinux.o modules.builtin.modinfo modules.builtin: vmlinux_o
@:
PHONY += vmlinux
vmlinux: vmlinux.o $(KBUILD_LDS) modpost
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.vmlinux
# The actual objects are generated when descending,
# make sure no implicit rule kicks in
$(sort $(vmlinux-deps) $(subdir-modorder)): descend ;
$(sort $(KBUILD_LDS) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)): . ;
filechk_kernel.release = \
echo "$(KERNELVERSION)$$($(CONFIG_SHELL) $(srctree)/scripts/setlocalversion $(srctree))"
@ -1269,11 +1262,11 @@ PHONY += prepare archprepare
archprepare: outputmakefile archheaders archscripts scripts include/config/kernel.release \
asm-generic $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
include/generated/autoconf.h remove-stale-files
include/generated/compile.h include/generated/autoconf.h remove-stale-files
prepare0: archprepare
$(Q)$(MAKE) $(build)=scripts/mod
$(Q)$(MAKE) $(build)=.
$(Q)$(MAKE) $(build)=. prepare
# All the preparing..
prepare: prepare0
@ -1335,6 +1328,12 @@ $(version_h): FORCE
include/generated/utsrelease.h: include/config/kernel.release FORCE
$(call filechk,utsrelease.h)
filechk_compile.h = $(srctree)/scripts/mkcompile_h \
"$(UTS_MACHINE)" "$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
include/generated/compile.h: FORCE
$(call filechk,compile.h)
PHONY += headerdep
headerdep:
$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
@ -1509,22 +1508,16 @@ endif
# Build modules
#
# A module can be listed more than once in obj-m resulting in
# duplicate lines in modules.order files. Those are removed
# using awk while concatenating to the final file.
PHONY += modules
modules: $(if $(KBUILD_BUILTIN),vmlinux) modules_check modules_prepare
# *.ko are usually independent of vmlinux, but CONFIG_DEBUG_INFOBTF_MODULES
# is an exception.
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
modules: vmlinux
endif
cmd_modules_order = $(AWK) '!x[$$0]++' $(real-prereqs) > $@
modules.order: $(subdir-modorder) FORCE
$(call if_changed,modules_order)
targets += modules.order
modules: modules_prepare
# Target to prepare building external modules
PHONY += modules_prepare
modules_prepare: prepare
$(Q)$(MAKE) $(build)=scripts scripts/module.lds
@ -1574,7 +1567,8 @@ endif # CONFIG_MODULES
# Directories & files removed with 'make clean'
CLEAN_FILES += include/ksym vmlinux.symvers modules-only.symvers \
modules.builtin modules.builtin.modinfo modules.nsdeps \
compile_commands.json .thinlto-cache rust/test rust/doc
compile_commands.json .thinlto-cache rust/test rust/doc \
.vmlinux.objs .vmlinux.export.c
# Directories & files removed with 'make mrproper'
MRPROPER_FILES += include/config include/generated \
@ -1862,9 +1856,7 @@ else # KBUILD_EXTMOD
KBUILD_BUILTIN :=
KBUILD_MODULES := 1
build-dirs := $(KBUILD_EXTMOD)
$(MODORDER): descend
@:
build-dir := $(KBUILD_EXTMOD)
compile_commands.json: $(extmod_prefix)compile_commands.json
PHONY += compile_commands.json
@ -1893,20 +1885,24 @@ help:
@echo ' clean - remove generated files in module directory only'
@echo ''
# no-op for external module builds
PHONY += modules_prepare
endif # KBUILD_EXTMOD
# ---------------------------------------------------------------------------
# Modules
PHONY += modules modules_install
PHONY += modules modules_install modules_prepare
ifdef CONFIG_MODULES
modules: modules_check
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
$(MODORDER): $(build-dir)
@:
# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
# This is solely useful to speed up test compiles.
modules: modpost
ifneq ($(KBUILD_MODPOST_NOFINAL),1)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
endif
PHONY += modules_check
modules_check: $(MODORDER)
@ -1933,8 +1929,15 @@ modules modules_install:
@echo >&2 '***'
@exit 1
KBUILD_MODULES :=
endif # CONFIG_MODULES
PHONY += modpost
modpost: $(if $(single-build),, $(if $(KBUILD_BUILTIN), vmlinux.o)) \
$(if $(KBUILD_MODULES), modules_check)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
# Single targets
# ---------------------------------------------------------------------------
# To build individual files in subdirectories, you can do like this:
@ -1954,47 +1957,32 @@ single-ko := $(sort $(filter %.ko, $(MAKECMDGOALS)))
single-no-ko := $(filter-out $(single-ko), $(MAKECMDGOALS)) \
$(foreach x, o mod, $(patsubst %.ko, %.$x, $(single-ko)))
$(single-ko): single_modpost
$(single-ko): single_modules
@:
$(single-no-ko): descend
$(single-no-ko): $(build-dir)
@:
ifeq ($(KBUILD_EXTMOD),)
# For the single build of in-tree modules, use a temporary file to avoid
# the situation of modules_install installing an invalid modules.order.
MODORDER := .modules.tmp
endif
PHONY += single_modpost
single_modpost: $(single-no-ko) modules_prepare
# Remove MODORDER when done because it is not the real one.
PHONY += single_modules
single_modules: $(single-no-ko) modules_prepare
$(Q){ $(foreach m, $(single-ko), echo $(extmod_prefix)$m;) } > $(MODORDER)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
ifneq ($(KBUILD_MODPOST_NOFINAL),1)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
endif
$(Q)rm -f $(MODORDER)
KBUILD_MODULES := 1
export KBUILD_SINGLE_TARGETS := $(addprefix $(extmod_prefix), $(single-no-ko))
# trim unrelated directories
build-dirs := $(foreach d, $(build-dirs), \
$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
single-goals := $(addprefix $(build-dir)/, $(single-no-ko))
endif
ifndef CONFIG_MODULES
KBUILD_MODULES :=
endif
# Handle descending into subdirectories listed in $(build-dirs)
# Preset locale variables to speed up the build process. Limit locale
# tweaks to this spot to avoid wrong language settings when running
# make menuconfig etc.
# Error messages still appears in the original language
PHONY += descend $(build-dirs)
descend: $(build-dirs)
$(build-dirs): prepare
$(Q)$(MAKE) $(build)=$@ \
single-build=$(if $(filter-out $@/, $(filter $@/%, $(KBUILD_SINGLE_TARGETS))),1) \
need-builtin=1 need-modorder=1
PHONY += $(build-dir)
$(build-dir): prepare
$(Q)$(MAKE) $(build)=$@ need-builtin=1 need-modorder=1 $(single-goals)
clean-dirs := $(addprefix _clean_, $(clean-dirs))
PHONY += $(clean-dirs) clean
@ -2042,7 +2030,7 @@ quiet_cmd_gen_compile_commands = GEN $@
cmd_gen_compile_commands = $(PYTHON3) $< -a $(AR) -o $@ $(filter-out $<, $(real-prereqs))
$(extmod_prefix)compile_commands.json: scripts/clang-tools/gen_compile_commands.py \
$(if $(KBUILD_EXTMOD),,$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS)) \
$(if $(KBUILD_EXTMOD),, vmlinux.a $(KBUILD_VMLINUX_LIBS)) \
$(if $(CONFIG_MODULES), $(MODORDER)) FORCE
$(call if_changed,gen_compile_commands)

2
arch/alpha/Makefile
View file

@ -36,8 +36,6 @@ cflags-y += $(cpuflags-y)
# BWX is most important, but we don't really want any emulation ever.
KBUILD_CFLAGS += $(cflags-y) -Wa,-mev6
head-y := arch/alpha/kernel/head.o
libs-y += arch/alpha/lib/
# export what is needed by arch/alpha/boot/Makefile

4
arch/alpha/kernel/Makefile
View file

@ -3,11 +3,11 @@
# Makefile for the linux kernel.
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
asflags-y := $(KBUILD_CFLAGS)
ccflags-y := -Wno-sign-compare
obj-y := entry.o traps.o process.o osf_sys.o irq.o \
obj-y := head.o entry.o traps.o process.o osf_sys.o irq.o \
irq_alpha.o signal.o setup.o ptrace.o time.o \
systbls.o err_common.o io.o bugs.o termios.o

2
arch/arc/Makefile
View file

@ -82,8 +82,6 @@ KBUILD_CFLAGS += $(cflags-y)
KBUILD_AFLAGS += $(KBUILD_CFLAGS)
KBUILD_LDFLAGS += $(ldflags-y)
head-y := arch/arc/kernel/head.o
# w/o this dtb won't embed into kernel binary
core-y += arch/arc/boot/dts/

4
arch/arc/kernel/Makefile
View file

@ -3,7 +3,7 @@
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
obj-y := arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
obj-y := head.o arcksyms.o setup.o irq.o reset.o ptrace.o process.o devtree.o
obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o disasm.o
obj-$(CONFIG_ISA_ARCOMPACT) += entry-compact.o intc-compact.o
obj-$(CONFIG_ISA_ARCV2) += entry-arcv2.o intc-arcv2.o
@ -31,4 +31,4 @@ else
obj-y += ctx_sw_asm.o
endif
extra-y := vmlinux.lds head.o
extra-y := vmlinux.lds

3
arch/arm/Makefile
View file

@ -137,9 +137,6 @@ KBUILD_AFLAGS +=$(CFLAGS_ABI) $(AFLAGS_ISA) $(arch-y) $(tune-y) -include asm/uni
CHECKFLAGS += -D__arm__
#Default value
head-y := arch/arm/kernel/head$(MMUEXT).o
# Text offset. This list is sorted numerically by address in order to
# provide a means to avoid/resolve conflicts in multi-arch kernels.
# Note: the 32kB below this value is reserved for use by the kernel

4
arch/arm/kernel/Makefile
View file

@ -88,7 +88,7 @@ obj-$(CONFIG_VDSO) += vdso.o
obj-$(CONFIG_EFI) += efi.o
obj-$(CONFIG_PARAVIRT) += paravirt.o
head-y := head$(MMUEXT).o
obj-y += head$(MMUEXT).o
obj-$(CONFIG_DEBUG_LL) += debug.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_ARM_PATCH_PHYS_VIRT) += phys2virt.o
@ -108,4 +108,4 @@ obj-$(CONFIG_HAVE_ARM_SMCCC) += smccc-call.o
obj-$(CONFIG_GENERIC_CPU_VULNERABILITIES) += spectre.o
extra-y := $(head-y) vmlinux.lds
extra-y := vmlinux.lds

3
arch/arm64/Makefile
View file

@ -133,9 +133,6 @@ ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y)
CC_FLAGS_FTRACE := -fpatchable-function-entry=2
endif
# Default value
head-y := arch/arm64/kernel/head.o
ifeq ($(CONFIG_KASAN_SW_TAGS), y)
KASAN_SHADOW_SCALE_SHIFT := 4
else ifeq ($(CONFIG_KASAN_GENERIC), y)

4
arch/arm64/kernel/Makefile
View file

@ -86,8 +86,8 @@ $(obj)/vdso-wrap.o: $(obj)/vdso/vdso.so
$(obj)/vdso32-wrap.o: $(obj)/vdso32/vdso.so
obj-y += probes/
head-y := head.o
extra-y += $(head-y) vmlinux.lds
obj-y += head.o
extra-y += vmlinux.lds
ifeq ($(CONFIG_DEBUG_EFI),y)
AFLAGS_head.o += -DVMLINUX_PATH="\"$(realpath $(objtree)/vmlinux)\""

2
arch/csky/Makefile
View file

@ -59,8 +59,6 @@ LDFLAGS += -EL
KBUILD_AFLAGS += $(KBUILD_CFLAGS)
head-y := arch/csky/kernel/head.o
core-y += arch/csky/$(CSKYABI)/
libs-y += arch/csky/lib/ \

4
arch/csky/kernel/Makefile
View file

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y += entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
obj-y += head.o entry.o atomic.o signal.o traps.o irq.o time.o vdso.o vdso/
obj-y += power.o syscall.o syscall_table.o setup.o io.o
obj-y += process.o cpu-probe.o ptrace.o stacktrace.o
obj-y += probes/

2
arch/hexagon/Makefile
View file

@ -32,5 +32,3 @@ KBUILD_LDFLAGS += $(ldflags-y)
TIR_NAME := r19
KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__
KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME)
head-y := arch/hexagon/kernel/head.o

3
arch/hexagon/kernel/Makefile
View file

@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y += head.o
obj-$(CONFIG_SMP) += smp.o
obj-y += setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o

1
arch/ia64/Makefile
View file

@ -44,7 +44,6 @@ quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
KBUILD_CFLAGS += $(cflags-y)
head-y := arch/ia64/kernel/head.o
libs-y += arch/ia64/lib/

9
arch/ia64/kernel/Makefile
View file

@ -7,9 +7,9 @@ ifdef CONFIG_DYNAMIC_FTRACE
CFLAGS_REMOVE_ftrace.o = -pg
endif
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y := entry.o efi.o efi_stub.o gate-data.o fsys.o irq.o irq_ia64.o \
obj-y := head.o entry.o efi.o efi_stub.o gate-data.o fsys.o irq.o irq_ia64.o \
irq_lsapic.o ivt.o pal.o patch.o process.o ptrace.o sal.o \
salinfo.o setup.o signal.o sys_ia64.o time.o traps.o unaligned.o \
unwind.o mca.o mca_asm.o topology.o dma-mapping.o iosapic.o acpi.o \
@ -34,10 +34,7 @@ mca_recovery-y += mca_drv.o mca_drv_asm.o
obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_IA64_ESI) += esi.o
ifneq ($(CONFIG_IA64_ESI),)
obj-y += esi_stub.o # must be in kernel proper
endif
obj-$(CONFIG_IA64_ESI) += esi.o esi_stub.o # must be in kernel proper
obj-$(CONFIG_INTEL_IOMMU) += pci-dma.o
obj-$(CONFIG_ELF_CORE) += elfcore.o

2
arch/loongarch/Makefile
View file

@ -79,8 +79,6 @@ CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
endif
head-y := arch/loongarch/kernel/head.o
libs-y += arch/loongarch/lib/
libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

4
arch/loongarch/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for the Linux/LoongArch kernel.
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y += cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \
obj-y += head.o cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \
traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \
elf.o syscall.o signal.o time.o topology.o inst.o ptrace.o vdso.o

2
arch/m68k/68000/Makefile
View file

@ -17,4 +17,4 @@ obj-$(CONFIG_DRAGEN2) += dragen2.o
obj-$(CONFIG_UCSIMM) += ucsimm.o
obj-$(CONFIG_UCDIMM) += ucsimm.o
extra-y := head.o
obj-y += head.o

9
arch/m68k/Makefile
View file

@ -86,15 +86,6 @@ ifdef CONFIG_KGDB
KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g
endif
#
# Select the assembler head startup code. Order is important. The default
# head code is first, processor specific selections can override it after.
#
head-y := arch/m68k/kernel/head.o
head-$(CONFIG_SUN3) := arch/m68k/kernel/sun3-head.o
head-$(CONFIG_M68000) := arch/m68k/68000/head.o
head-$(CONFIG_COLDFIRE) := arch/m68k/coldfire/head.o
libs-y += arch/m68k/lib/

2
arch/m68k/coldfire/Makefile
View file

@ -45,4 +45,4 @@ obj-$(CONFIG_STMARK2) += stmark2.o
obj-$(CONFIG_PCI) += pci.o
obj-y += gpio.o
extra-y := head.o
obj-y += head.o

23
arch/m68k/kernel/Makefile
View file

@ -3,19 +3,20 @@
# Makefile for the linux kernel.
#
extra-$(CONFIG_AMIGA) := head.o
extra-$(CONFIG_ATARI) := head.o
extra-$(CONFIG_MAC) := head.o
extra-$(CONFIG_APOLLO) := head.o
extra-$(CONFIG_VME) := head.o
extra-$(CONFIG_HP300) := head.o
extra-$(CONFIG_Q40) := head.o
extra-$(CONFIG_SUN3X) := head.o
extra-$(CONFIG_VIRT) := head.o
extra-$(CONFIG_SUN3) := sun3-head.o
extra-y += vmlinux.lds
obj-y := entry.o irq.o module.o process.o ptrace.o
obj-$(CONFIG_AMIGA) := head.o
obj-$(CONFIG_ATARI) := head.o
obj-$(CONFIG_MAC) := head.o
obj-$(CONFIG_APOLLO) := head.o
obj-$(CONFIG_VME) := head.o
obj-$(CONFIG_HP300) := head.o
obj-$(CONFIG_Q40) := head.o
obj-$(CONFIG_SUN3X) := head.o
obj-$(CONFIG_VIRT) := head.o
obj-$(CONFIG_SUN3) := sun3-head.o
obj-y += entry.o irq.o module.o process.o ptrace.o
obj-y += setup.o signal.o sys_m68k.o syscalltable.o time.o traps.o
obj-$(CONFIG_MMU_MOTOROLA) += ints.o vectors.o

1
arch/microblaze/Makefile
View file

@ -48,7 +48,6 @@ CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))
# r31 holds current when in kernel mode
KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-y) $(CPUFLAGS-1) $(CPUFLAGS-2)
head-y := arch/microblaze/kernel/head.o
libs-y += arch/microblaze/lib/
boot := arch/microblaze/boot

4
arch/microblaze/kernel/Makefile
View file

@ -12,9 +12,9 @@ CFLAGS_REMOVE_ftrace.o = -pg
CFLAGS_REMOVE_process.o = -pg
endif
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y += dma.o exceptions.o \
obj-y += head.o dma.o exceptions.o \
hw_exception_handler.o irq.o \
process.o prom.o ptrace.o \
reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.o

2
arch/mips/Makefile
View file

@ -324,8 +324,6 @@ endif
OBJCOPYFLAGS += --remove-section=.reginfo
head-y := arch/mips/kernel/head.o
libs-y += arch/mips/lib/
libs-$(CONFIG_MIPS_FP_SUPPORT) += arch/mips/math-emu/

4
arch/mips/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for the Linux/MIPS kernel.
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y += branch.o cmpxchg.o elf.o entry.o genex.o idle.o irq.o \
obj-y += head.o branch.o cmpxchg.o elf.o entry.o genex.o idle.o irq.o \
process.o prom.o ptrace.o reset.o setup.o signal.o \
syscall.o time.o topology.o traps.o unaligned.o watch.o \
vdso.o cacheinfo.o

2
arch/nios2/Kbuild
View file

@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += kernel/ mm/ platform/ boot/dts/
# for cleaning
subdir- += boot

5
arch/nios2/Makefile
View file

@ -37,10 +37,7 @@ KBUILD_CFLAGS += -DUTS_SYSNAME=\"$(UTS_SYSNAME)\"
KBUILD_CFLAGS += -fno-builtin
KBUILD_CFLAGS += -G 0
head-y := arch/nios2/kernel/head.o
libs-y += arch/nios2/lib/ $(LIBGCC)
core-y += arch/nios2/kernel/ arch/nios2/mm/
core-y += arch/nios2/platform/
INSTALL_PATH ?= /tftpboot
nios2-boot := arch/$(ARCH)/boot
@ -48,8 +45,6 @@ BOOT_TARGETS = vmImage zImage
PHONY += $(BOOT_TARGETS) install
KBUILD_IMAGE := $(nios2-boot)/vmImage
core-y += $(nios2-boot)/dts/
all: vmImage
$(BOOT_TARGETS): vmlinux

2
arch/nios2/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for the nios2 linux kernel.
#
extra-y += head.o
extra-y += vmlinux.lds
obj-y += head.o
obj-y += cpuinfo.o
obj-y += entry.o
obj-y += insnemu.o

2
arch/openrisc/Makefile
View file

@ -55,8 +55,6 @@ ifeq ($(CONFIG_OPENRISC_HAVE_INST_SEXT),y)
KBUILD_CFLAGS += $(call cc-option,-msext)
endif
head-y := arch/openrisc/kernel/head.o
libs-y += $(LIBGCC)
PHONY += vmlinux.bin

4
arch/openrisc/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for the linux kernel.
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y := setup.o or32_ksyms.o process.o dma.o \
obj-y := head.o setup.o or32_ksyms.o process.o dma.o \
traps.o time.o irq.o entry.o ptrace.o signal.o \
sys_call_table.o unwinder.o

2
arch/parisc/Makefile
View file

@ -113,8 +113,6 @@ cflags-$(CONFIG_PA7100LC) += -march=1.1 -mschedule=7100LC
cflags-$(CONFIG_PA7300LC) += -march=1.1 -mschedule=7300
cflags-$(CONFIG_PA8X00) += -march=2.0 -mschedule=8000
head-y := arch/parisc/kernel/head.o
KBUILD_CFLAGS += $(cflags-y)
LIBGCC := $(shell $(CC) -print-libgcc-file-name)
export LIBGCC

4
arch/parisc/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for arch/parisc/kernel
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y := cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \
obj-y := head.o cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \
pa7300lc.o syscall.o entry.o sys_parisc.o firmware.o \
ptrace.o hardware.o inventory.o drivers.o alternative.o \
signal.o hpmc.o real2.o parisc_ksyms.o unaligned.o \

12
arch/powerpc/Makefile
View file

@ -232,18 +232,6 @@ KBUILD_CFLAGS += $(cpu-as-y)
KBUILD_AFLAGS += $(aflags-y)
KBUILD_CFLAGS += $(cflags-y)
head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o
head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o
head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o
head-$(CONFIG_PPC_85xx) := arch/powerpc/kernel/head_85xx.o
head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o
head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o
head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o
head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
# Default to zImage, override when needed
all: zImage

2
arch/powerpc/boot/wrapper
View file

@ -433,7 +433,7 @@ fi
# Extract kernel version information, some platforms want to include
# it in the image header
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
cut -d' ' -f3`
head -n1 | cut -d' ' -f3`
if [ -n "$version" ]; then
uboot_version="-n Linux-$version"
fi

20
arch/powerpc/kernel/Makefile
View file

@ -116,12 +116,12 @@ obj-$(CONFIG_PPC_E500) += cpu_setup_e500.o
obj-$(CONFIG_PPC_DOORBELL) += dbell.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
extra-$(CONFIG_PPC64) := head_64.o
extra-$(CONFIG_PPC_BOOK3S_32) := head_book3s_32.o
extra-$(CONFIG_40x) := head_40x.o
extra-$(CONFIG_44x) := head_44x.o
extra-$(CONFIG_PPC_85xx) := head_85xx.o
extra-$(CONFIG_PPC_8xx) := head_8xx.o
obj-$(CONFIG_PPC64) += head_64.o
obj-$(CONFIG_PPC_BOOK3S_32) += head_book3s_32.o
obj-$(CONFIG_40x) += head_40x.o
obj-$(CONFIG_44x) += head_44x.o
obj-$(CONFIG_PPC_8xx) += head_8xx.o
obj-$(CONFIG_FSL_BOOKE) += head_85xx.o
extra-y += vmlinux.lds
obj-$(CONFIG_RELOCATABLE) += reloc_$(BITS).o
@ -196,10 +196,10 @@ KCOV_INSTRUMENT_paca.o := n
CFLAGS_setup_64.o += -fno-stack-protector
CFLAGS_paca.o += -fno-stack-protector
extra-$(CONFIG_PPC_FPU) += fpu.o
extra-$(CONFIG_ALTIVEC) += vector.o
extra-$(CONFIG_PPC64) += entry_64.o
extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o
obj-$(CONFIG_PPC_FPU) += fpu.o
obj-$(CONFIG_ALTIVEC) += vector.o
obj-$(CONFIG_PPC64) += entry_64.o
obj-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init.o
extra-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += prom_init_check

2
arch/riscv/Makefile
View file

@ -110,8 +110,6 @@ else
KBUILD_IMAGE := $(boot)/Image.gz
endif
head-y := arch/riscv/kernel/head.o
libs-y += arch/riscv/lib/
libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a

2
arch/riscv/kernel/Makefile
View file

@ -28,9 +28,9 @@ KASAN_SANITIZE_cpufeature.o := n
endif
endif
extra-y += head.o
extra-y += vmlinux.lds
obj-y += head.o
obj-y += soc.o
obj-$(CONFIG_RISCV_ALTERNATIVE) += alternative.o
obj-y += cpu.o

2
arch/s390/Makefile
View file

@ -119,8 +119,6 @@ export KBUILD_CFLAGS_DECOMPRESSOR
OBJCOPYFLAGS := -O binary
head-y := arch/s390/kernel/head64.o
libs-y += arch/s390/lib/
drivers-y += drivers/s390/

1
arch/s390/boot/version.c
View file

@ -1,4 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
#include <generated/utsversion.h>
#include <generated/utsrelease.h>
#include <generated/compile.h>
#include "boot.h"

4
arch/s390/kernel/Makefile
View file

@ -33,7 +33,7 @@ CFLAGS_stacktrace.o += -fno-optimize-sibling-calls
CFLAGS_dumpstack.o += -fno-optimize-sibling-calls
CFLAGS_unwind_bc.o += -fno-optimize-sibling-calls
obj-y := traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o
obj-y := head64.o traps.o time.o process.o earlypgm.o early.o setup.o idle.o vtime.o
obj-y += processor.o syscall.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o cpufeature.o
obj-y += sysinfo.o lgr.o os_info.o machine_kexec.o
@ -42,7 +42,7 @@ obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o
obj-y += nospec-branch.o ipl_vmparm.o machine_kexec_reloc.o unwind_bc.o
obj-y += smp.o text_amode31.o stacktrace.o abs_lowcore.o
extra-y += head64.o vmlinux.lds
extra-y += vmlinux.lds
obj-$(CONFIG_SYSFS) += nospec-sysfs.o
CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)

2
arch/sh/Makefile
View file

@ -114,8 +114,6 @@ endif
export ld-bfd
head-y := arch/sh/kernel/head_32.o
# Mach groups
machdir-$(CONFIG_SOLUTION_ENGINE) += mach-se
machdir-$(CONFIG_SH_HP6XX) += mach-hp6xx

4
arch/sh/kernel/Makefile
View file

@ -3,7 +3,7 @@
# Makefile for the Linux/SuperH kernel.
#
extra-y := head_32.o vmlinux.lds
extra-y := vmlinux.lds
ifdef CONFIG_FUNCTION_TRACER
# Do not profile debug and lowlevel utilities
@ -12,7 +12,7 @@ endif
CFLAGS_REMOVE_return_address.o = -pg
obj-y := debugtraps.o dumpstack.o \
obj-y := head_32.o debugtraps.o dumpstack.o \
idle.o io.o irq.o irq_32.o kdebugfs.o \
machvec.o nmi_debug.o process.o \
process_32.o ptrace.o ptrace_32.o \

2
arch/sparc/Makefile
View file

@ -56,8 +56,6 @@ endif
endif
head-y := arch/sparc/kernel/head_$(BITS).o
libs-y += arch/sparc/prom/
libs-y += arch/sparc/lib/

3
arch/sparc/kernel/Makefile
View file

@ -7,8 +7,6 @@
asflags-y := -ansi
ccflags-y := -Werror
extra-y := head_$(BITS).o
# Undefine sparc when processing vmlinux.lds - it is used
# And teach CPP we are doing $(BITS) builds (for this case)
CPPFLAGS_vmlinux.lds := -Usparc -m$(BITS)
@ -22,6 +20,7 @@ CFLAGS_REMOVE_perf_event.o := -pg
CFLAGS_REMOVE_pcr.o := -pg
endif
obj-y := head_$(BITS).o
obj-$(CONFIG_SPARC64) += urtt_fill.o
obj-$(CONFIG_SPARC32) += entry.o wof.o wuf.o
obj-$(CONFIG_SPARC32) += etrap_32.o

5
arch/x86/Makefile
View file

@ -244,11 +244,6 @@ archheaders:
###
# Kernel objects
head-y := arch/x86/kernel/head_$(BITS).o
head-y += arch/x86/kernel/head$(BITS).o
head-y += arch/x86/kernel/ebda.o
head-y += arch/x86/kernel/platform-quirks.o
libs-y += arch/x86/lib/
# drivers-y are linked after core-y

1
arch/x86/boot/compressed/kaslr.c
View file

@ -29,6 +29,7 @@
#include <linux/uts.h>
#include <linux/utsname.h>
#include <linux/ctype.h>
#include <generated/utsversion.h>
#include <generated/utsrelease.h>
#define _SETUP

1
arch/x86/boot/version.c
View file

@ -11,6 +11,7 @@
*/
#include "boot.h"
#include <generated/utsversion.h>
#include <generated/utsrelease.h>
#include <generated/compile.h>

10
arch/x86/kernel/Makefile
View file

@ -3,10 +3,6 @@
# Makefile for the linux kernel.
#
extra-y := head_$(BITS).o
extra-y += head$(BITS).o
extra-y += ebda.o
extra-y += platform-quirks.o
extra-y += vmlinux.lds
CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
@ -42,7 +38,11 @@ KCOV_INSTRUMENT := n
CFLAGS_irq.o := -I $(srctree)/$(src)/../include/asm/trace
obj-y := process_$(BITS).o signal.o
obj-y += head_$(BITS).o
obj-y += head$(BITS).o
obj-y += ebda.o
obj-y += platform-quirks.o
obj-y += process_$(BITS).o signal.o
obj-$(CONFIG_COMPAT) += signal_compat.o
obj-y += traps.o idt.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time.o ioport.o dumpstack.o nmi.o

2
arch/xtensa/Makefile
View file

@ -55,8 +55,6 @@ KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(vardirs) $(plfdirs))
KBUILD_DEFCONFIG := iss_defconfig
head-y := arch/xtensa/kernel/head.o
libs-y += arch/xtensa/lib/
boot := arch/xtensa/boot

4
arch/xtensa/kernel/Makefile
View file

@ -3,9 +3,9 @@
# Makefile for the Linux/Xtensa kernel.
#
extra-y := head.o vmlinux.lds
extra-y := vmlinux.lds
obj-y := align.o coprocessor.o entry.o irq.o platform.o process.o \
obj-y := head.o align.o coprocessor.o entry.o irq.o platform.o process.o \
ptrace.o setup.o signal.o stacktrace.o syscall.o time.o traps.o \
vectors.o

2
drivers/gpu/drm/amd/display/dc/dml/Makefile
View file

@ -34,7 +34,7 @@ dml_ccflags := -mhard-float -maltivec
endif
ifdef CONFIG_CC_IS_GCC
ifeq ($(call cc-ifversion, -lt, 0701, y), y)
ifneq ($(call gcc-min-version, 70100),y)
IS_OLD_GCC = 1
endif
endif

6
include/linux/export-internal.h
View file

@ -10,8 +10,10 @@
#include <linux/compiler.h>
#include <linux/types.h>
/* __used is needed to keep __crc_* for LTO */
#define SYMBOL_CRC(sym, crc, sec) \
u32 __section("___kcrctab" sec "+" #sym) __used __crc_##sym = crc
asm(".section \"___kcrctab" sec "+" #sym "\",\"a\"" "\n" \
"__crc_" #sym ":" "\n" \
".long " #crc "\n" \
".previous" "\n")
#endif /* __LINUX_EXPORT_INTERNAL_H__ */

2
init/.gitignore vendored Normal file
View file

@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
/utsversion-tmp.h

51
init/Makefile
View file

@ -19,20 +19,43 @@ mounts-y := do_mounts.o
mounts-$(CONFIG_BLK_DEV_RAM) += do_mounts_rd.o
mounts-$(CONFIG_BLK_DEV_INITRD) += do_mounts_initrd.o
# dependencies on generated files need to be listed explicitly
$(obj)/version.o: include/generated/compile.h
#
# UTS_VERSION
#
# compile.h changes depending on hostname, generation number, etc,
# so we regenerate it always.
# mkcompile_h will make sure to only update the
# actual file if its content has changed.
smp-flag-$(CONFIG_SMP) := SMP
preempt-flag-$(CONFIG_PREEMPT_BUILD) := PREEMPT
preempt-flag-$(CONFIG_PREEMPT_DYNAMIC) := PREEMPT_DYNAMIC
preempt-flag-$(CONFIG_PREEMPT_RT) := PREEMPT_RT
quiet_cmd_compile.h = CHK $@
cmd_compile.h = \
$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \
"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT_BUILD)" \
"$(CONFIG_PREEMPT_DYNAMIC)" "$(CONFIG_PREEMPT_RT)" \
"$(CONFIG_CC_VERSION_TEXT)" "$(LD)"
build-version = $(or $(KBUILD_BUILD_VERSION), $(build-version-auto))
build-timestamp = $(or $(KBUILD_BUILD_TIMESTAMP), $(build-timestamp-auto))
include/generated/compile.h: FORCE
$(call cmd,compile.h)
# Maximum length of UTS_VERSION is 64 chars
filechk_uts_version = \
utsver=$$(echo '$(pound)'"$(build-version)" $(smp-flag-y) $(preempt-flag-y) "$(build-timestamp)" | cut -b -64); \
echo '$(pound)'define UTS_VERSION \""$${utsver}"\"
#
# Build version.c with temporary UTS_VERSION
#
$(obj)/utsversion-tmp.h: FORCE
$(call filechk,uts_version)
clean-files += utsversion-tmp.h
$(obj)/version.o: $(obj)/utsversion-tmp.h
CFLAGS_version.o := -include $(obj)/utsversion-tmp.h
#
# Build version-timestamp.c with final UTS_VERSION
#
include/generated/utsversion.h: build-version-auto = $(shell $(srctree)/$(src)/build-version)
include/generated/utsversion.h: build-timestamp-auto = $(shell LC_ALL=C date)
include/generated/utsversion.h: FORCE
$(call filechk,uts_version)
$(obj)/version-timestamp.o: include/generated/utsversion.h
CFLAGS_version-timestamp.o := -include include/generated/utsversion.h

10
init/build-version Executable file
View file

@ -0,0 +1,10 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
prev_ver=$(cat .version 2>/dev/null) &&
ver=$(expr ${prev_ver} + 1 2>/dev/null) ||
ver=1
echo ${ver} > .version
echo ${ver}

31
init/version-timestamp.c Normal file
View file

@ -0,0 +1,31 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <generated/compile.h>
#include <generated/utsrelease.h>
#include <linux/version.h>
#include <linux/proc_ns.h>
#include <linux/refcount.h>
#include <linux/uts.h>
#include <linux/utsname.h>
struct uts_namespace init_uts_ns = {
.ns.count = REFCOUNT_INIT(2),
.name = {
.sysname = UTS_SYSNAME,
.nodename = UTS_NODENAME,
.release = UTS_RELEASE,
.version = UTS_VERSION,
.machine = UTS_MACHINE,
.domainname = UTS_DOMAINNAME,
},
.user_ns = &init_user_ns,
.ns.inum = PROC_UTS_INIT_INO,
#ifdef CONFIG_UTS_NS
.ns.ops = &utsns_operations,
#endif
};
/* FIXED STRINGS! Don't touch! */
const char linux_banner[] =
"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";

37
init/version.c
View file

@ -16,27 +16,8 @@
#include <linux/uts.h>
#include <linux/utsname.h>
#include <generated/utsrelease.h>
#include <linux/version.h>
#include <linux/proc_ns.h>
struct uts_namespace init_uts_ns = {
.ns.count = REFCOUNT_INIT(2),
.name = {
.sysname = UTS_SYSNAME,
.nodename = UTS_NODENAME,
.release = UTS_RELEASE,
.version = UTS_VERSION,
.machine = UTS_MACHINE,
.domainname = UTS_DOMAINNAME,
},
.user_ns = &init_user_ns,
.ns.inum = PROC_UTS_INIT_INO,
#ifdef CONFIG_UTS_NS
.ns.ops = &utsns_operations,
#endif
};
EXPORT_SYMBOL_GPL(init_uts_ns);
static int __init early_hostname(char *arg)
{
size_t bufsize = sizeof(init_uts_ns.name.nodename);
@ -52,11 +33,6 @@ static int __init early_hostname(char *arg)
}
early_param("hostname", early_hostname);
/* FIXED STRINGS! Don't touch! */
const char linux_banner[] =
"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";
const char linux_proc_banner[] =
"%s version %s"
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
@ -64,3 +40,16 @@ const char linux_proc_banner[] =
BUILD_SALT;
BUILD_LTO_INFO;
/*
* init_uts_ns and linux_banner contain the build version and timestamp,
* which are really fixed at the very last step of build process.
* They are compiled with __weak first, and without __weak later.
*/
struct uts_namespace init_uts_ns __weak;
const char linux_banner[] __weak;
#include "version-timestamp.c"
EXPORT_SYMBOL_GPL(init_uts_ns);

6
kernel/gen_kheaders.sh
View file

@ -31,8 +31,8 @@ if [ "$building_out_of_srctree" ]; then
fi
all_dirs="$all_dirs $dir_list"
# include/generated/compile.h is ignored because it is touched even when none
# of the source files changed.
# include/generated/utsversion.h is ignored because it is generated after this
# script is executed. (utsversion.h is unneeded for kheaders)
#
# When Kconfig regenerates include/generated/autoconf.h, its timestamp is
# updated, but the contents might be still the same. When any CONFIG option is
@ -42,7 +42,7 @@ all_dirs="$all_dirs $dir_list"
#
# Ignore them for md5 calculation to avoid pointless regeneration.
headers_md5="$(find $all_dirs -name "*.h" |
grep -v "include/generated/compile.h" |
grep -v "include/generated/utsversion.h" |
grep -v "include/generated/autoconf.h" |
xargs ls -l | md5sum | cut -d ' ' -f1)"

8
lib/Kconfig
View file

@ -343,12 +343,16 @@ config LZ4HC_COMPRESS
config LZ4_DECOMPRESS
tristate
config ZSTD_COMPRESS
config ZSTD_COMMON
select XXHASH
tristate
config ZSTD_COMPRESS
select ZSTD_COMMON
tristate
config ZSTD_DECOMPRESS
select XXHASH
select ZSTD_COMMON
tristate
source "lib/xz/Kconfig"

16
lib/zstd/Makefile
View file

@ -10,14 +10,10 @@
# ################################################################
obj-$(CONFIG_ZSTD_COMPRESS) += zstd_compress.o
obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd_decompress.o
obj-$(CONFIG_ZSTD_COMMON) += zstd_common.o
zstd_compress-y := \
zstd_compress_module.o \
common/debug.o \
common/entropy_common.o \
common/error_private.o \
common/fse_decompress.o \
common/zstd_common.o \
compress/fse_compress.o \
compress/hist.o \
compress/huf_compress.o \
@ -33,12 +29,14 @@ zstd_compress-y := \
zstd_decompress-y := \
zstd_decompress_module.o \
decompress/huf_decompress.o \
decompress/zstd_ddict.o \
decompress/zstd_decompress.o \
decompress/zstd_decompress_block.o \
zstd_common-y := \
common/debug.o \
common/entropy_common.o \
common/error_private.o \
common/fse_decompress.o \
common/zstd_common.o \
decompress/huf_decompress.o \
decompress/zstd_ddict.o \
decompress/zstd_decompress.o \
decompress/zstd_decompress_block.o \

5
lib/zstd/common/entropy_common.c
View file

@ -15,6 +15,7 @@
/* *************************************
* Dependencies
***************************************/
#include <linux/module.h>
#include "mem.h"
#include "error_private.h" /* ERR_*, ERROR */
#define FSE_STATIC_LINKING_ONLY /* FSE_MIN_TABLELOG */
@ -239,7 +240,7 @@ size_t FSE_readNCount(
{
return FSE_readNCount_bmi2(normalizedCounter, maxSVPtr, tableLogPtr, headerBuffer, hbSize, /* bmi2 */ 0);
}
EXPORT_SYMBOL_GPL(FSE_readNCount);
/*! HUF_readStats() :
Read compact Huffman tree, saved by HUF_writeCTable().
@ -255,6 +256,7 @@ size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats,
U32 wksp[HUF_READ_STATS_WORKSPACE_SIZE_U32];
return HUF_readStats_wksp(huffWeight, hwSize, rankStats, nbSymbolsPtr, tableLogPtr, src, srcSize, wksp, sizeof(wksp), /* bmi2 */ 0);
}
EXPORT_SYMBOL_GPL(HUF_readStats);
FORCE_INLINE_TEMPLATE size_t
HUF_readStats_body(BYTE* huffWeight, size_t hwSize, U32* rankStats,
@ -355,3 +357,4 @@ size_t HUF_readStats_wksp(BYTE* huffWeight, size_t hwSize, U32* rankStats,
(void)bmi2;
return HUF_readStats_body_default(huffWeight, hwSize, rankStats, nbSymbolsPtr, tableLogPtr, src, srcSize, workSpace, wkspSize);
}
EXPORT_SYMBOL_GPL(HUF_readStats_wksp);

10
lib/zstd/common/zstd_common.c
View file

@ -13,6 +13,7 @@
/*-*************************************
* Dependencies
***************************************/
#include <linux/module.h>
#define ZSTD_DEPS_NEED_MALLOC
#include "zstd_deps.h" /* ZSTD_malloc, ZSTD_calloc, ZSTD_free, ZSTD_memset */
#include "error_private.h"
@ -35,14 +36,17 @@ const char* ZSTD_versionString(void) { return ZSTD_VERSION_STRING; }
* tells if a return value is an error code
* symbol is required for external callers */
unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
EXPORT_SYMBOL_GPL(ZSTD_isError);
/*! ZSTD_getErrorName() :
* provides error code string from function result (useful for debugging) */
const char* ZSTD_getErrorName(size_t code) { return ERR_getErrorName(code); }
EXPORT_SYMBOL_GPL(ZSTD_getErrorName);
/*! ZSTD_getError() :
* convert a `size_t` function result into a proper ZSTD_errorCode enum */
ZSTD_ErrorCode ZSTD_getErrorCode(size_t code) { return ERR_getErrorCode(code); }
EXPORT_SYMBOL_GPL(ZSTD_getErrorCode);
/*! ZSTD_getErrorString() :
* provides error code string from enum */
@ -59,6 +63,7 @@ void* ZSTD_customMalloc(size_t size, ZSTD_customMem customMem)
return customMem.customAlloc(customMem.opaque, size);
return ZSTD_malloc(size);
}
EXPORT_SYMBOL_GPL(ZSTD_customMalloc);
void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem)
{
@ -71,6 +76,7 @@ void* ZSTD_customCalloc(size_t size, ZSTD_customMem customMem)
}
return ZSTD_calloc(1, size);
}
EXPORT_SYMBOL_GPL(ZSTD_customCalloc);
void ZSTD_customFree(void* ptr, ZSTD_customMem customMem)
{
@ -81,3 +87,7 @@ void ZSTD_customFree(void* ptr, ZSTD_customMem customMem)
ZSTD_free(ptr);
}
}
EXPORT_SYMBOL_GPL(ZSTD_customFree);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Zstd Common");

23
scripts/Kbuild.include
View file

@ -100,8 +100,29 @@ echo-cmd = $(if $($(quiet)cmd_$(1)),\
quiet_redirect :=
silent_redirect := exec >/dev/null;
# Delete the target on interruption
#
# GNU Make automatically deletes the target if it has already been changed by
# the interrupted recipe. So, you can safely stop the build by Ctrl-C (Make
# will delete incomplete targets), and resume it later.
#
# However, this does not work when the stderr is piped to another program, like
# $ make >&2 | tee log
# Make dies with SIGPIPE before cleaning the targets.
#
# To address it, we clean the target in signal traps.
#
# Make deletes the target when it catches SIGHUP, SIGINT, SIGQUIT, SIGTERM.
# So, we cover them, and also SIGPIPE just in case.
#
# Of course, this is unneeded for phony targets.
delete-on-interrupt = \
$(if $(filter-out $(PHONY), $@), \
$(foreach sig, HUP INT QUIT TERM PIPE, \
trap 'rm -f $@; trap - $(sig); kill -s $(sig) $$$$' $(sig);))
# printing commands
cmd = @set -e; $(echo-cmd) $($(quiet)redirect) $(cmd_$(1))
cmd = @set -e; $(echo-cmd) $($(quiet)redirect) $(delete-on-interrupt) $(cmd_$(1))
###
# if_changed - execute command if any prerequisite is newer than

58
scripts/Makefile.build
View file

@ -5,8 +5,8 @@
src := $(obj)
PHONY := __build
__build:
PHONY := $(obj)/
$(obj)/:
# Init all relevant variables used in kbuild files so
# 1) they have correct type
@ -383,7 +383,7 @@ $(obj)/%.o: $(src)/%.S FORCE
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
targets += $(filter-out $(subdir-modorder), $(real-obj-m))
targets += $(real-dtb-y) $(lib-y) $(always-y) $(MAKECMDGOALS)
targets += $(real-dtb-y) $(lib-y) $(always-y)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
@ -434,7 +434,7 @@ $(obj)/built-in.a: $(real-obj-y) FORCE
cmd_modules_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \
| $(AWK) '!x[$$0]++' - > $@
> $@
$(obj)/modules.order: $(obj-m) FORCE
$(call if_changed,modules_order)
@ -460,8 +460,6 @@ $(multi-obj-m): %.o: %.mod FORCE
$(call if_changed_rule,ld_multi_m)
$(call multi_depend, $(multi-obj-m), .o, -objs -y -m)
targets := $(filter-out $(PHONY), $(targets))
# Add intermediate targets:
# When building objects with specific suffix patterns, add intermediate
# targets that the final targets are derived from.
@ -480,42 +478,19 @@ targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \
# Build
# ---------------------------------------------------------------------------
ifdef single-build
KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS))
curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \
$(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x))))
# Handle single targets without any rule: show "Nothing to be done for ..." or
# "No rule to make target ..." depending on whether the target exists.
unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \
$(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS)))
single-subdirs := $(foreach d, $(subdir-ym), \
$(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
__build: $(curdir-single) $(single-subdirs)
ifneq ($(unknown-single),)
$(Q)$(MAKE) -f /dev/null $(unknown-single)
endif
@:
ifeq ($(curdir-single),)
# Nothing to do in this directory. Do not include any .*.cmd file for speed-up
targets :=
else
targets += $(curdir-single)
endif
else
__build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
$(if $(KBUILD_MODULES), $(targets-for-modules)) \
$(subdir-ym) $(always-y)
@:
endif
# Single targets
# ---------------------------------------------------------------------------
single-subdirs := $(foreach d, $(subdir-ym), $(if $(filter $d/%, $(MAKECMDGOALS)), $d))
single-subdir-goals := $(filter $(addsuffix /%, $(single-subdirs)), $(MAKECMDGOALS))
$(single-subdir-goals): $(single-subdirs)
@:
# Descending
# ---------------------------------------------------------------------------
@ -523,9 +498,9 @@ endif
PHONY += $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) $(build)=$@ \
$(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \
need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \
need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1)
need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \
$(filter $@/%, $(single-subdir-goals))
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
@ -534,6 +509,9 @@ PHONY += FORCE
FORCE:
targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS))
targets := $(filter-out $(PHONY), $(targets))
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not

10
scripts/Makefile.compiler
View file

@ -61,9 +61,13 @@ cc-option-yn = $(call try-run,\
cc-disable-warning = $(call try-run,\
$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
# cc-ifversion
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4))
# gcc-min-version
# Usage: cflags-$(call gcc-min-version, 70100) += -foo
gcc-min-version = $(shell [ $(CONFIG_GCC_VERSION)0 -ge $(1)0 ] && echo y)
# clang-min-version
# Usage: cflags-$(call clang-min-version, 110000) += -foo
clang-min-version = $(shell [ $(CONFIG_CLANG_VERSION)0 -ge $(1)0 ] && echo y)
# ld-option
# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)

4
scripts/Makefile.extrawarn
View file

@ -48,7 +48,7 @@ else
ifdef CONFIG_CC_IS_CLANG
KBUILD_CFLAGS += -Wno-initializer-overrides
# Clang before clang-16 would warn on default argument promotions.
ifeq ($(shell [ $(CONFIG_CLANG_VERSION) -lt 160000 ] && echo y),y)
ifneq ($(call clang-min-version, 160000),y)
# Disable -Wformat
KBUILD_CFLAGS += -Wno-format
# Then re-enable flags that were part of the -Wformat group that aren't
@ -56,7 +56,7 @@ KBUILD_CFLAGS += -Wno-format
KBUILD_CFLAGS += -Wformat-extra-args -Wformat-invalid-specifier
KBUILD_CFLAGS += -Wformat-zero-length -Wnonnull
# Requires clang-12+.
ifeq ($(shell [ $(CONFIG_CLANG_VERSION) -ge 120000 ] && echo y),y)
ifeq ($(call clang-min-version, 120000),y)
KBUILD_CFLAGS += -Wformat-insufficient-args
endif
endif

33
scripts/Makefile.lib
View file

@ -90,6 +90,7 @@ always-y += $(dtb-y)
# Add subdir path
ifneq ($(obj),.)
extra-y := $(addprefix $(obj)/,$(extra-y))
always-y := $(addprefix $(obj)/,$(always-y))
targets := $(addprefix $(obj)/,$(targets))
@ -101,6 +102,7 @@ multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
endif
# Finds the multi-part object the current object will be linked into.
# If the object belongs to two or more multi-part objects, list them all.
@ -241,25 +243,26 @@ ifdef CONFIG_OBJTOOL
objtool := $(objtree)/tools/objtool/objtool
objtool_args = \
$(if $(CONFIG_HAVE_JUMP_LABEL_HACK), --hacks=jump_label) \
$(if $(CONFIG_HAVE_NOINSTR_HACK), --hacks=noinstr) \
$(if $(CONFIG_X86_KERNEL_IBT), --ibt) \
$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount) \
$(if $(CONFIG_UNWINDER_ORC), --orc) \
$(if $(CONFIG_RETPOLINE), --retpoline) \
$(if $(CONFIG_RETHUNK), --rethunk) \
$(if $(CONFIG_SLS), --sls) \
$(if $(CONFIG_STACK_VALIDATION), --stackval) \
$(if $(CONFIG_HAVE_STATIC_CALL_INLINE), --static-call) \
$(if $(CONFIG_HAVE_UACCESS_VALIDATION), --uaccess) \
objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label
objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr
objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt
objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount
objtool-args-$(CONFIG_UNWINDER_ORC) += --orc
objtool-args-$(CONFIG_RETPOLINE) += --retpoline
objtool-args-$(CONFIG_RETHUNK) += --rethunk
objtool-args-$(CONFIG_SLS) += --sls
objtool-args-$(CONFIG_STACK_VALIDATION) += --stackval
objtool-args-$(CONFIG_HAVE_STATIC_CALL_INLINE) += --static-call
objtool-args-$(CONFIG_HAVE_UACCESS_VALIDATION) += --uaccess
objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable
objtool-args = $(objtool-args-y) \
$(if $(delay-objtool), --link) \
$(if $(part-of-module), --module) \
$(if $(CONFIG_GCOV_KERNEL), --no-unreachable)
$(if $(part-of-module), --module)
delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT))
cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool_args) $@)
cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@)
cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd)
endif # CONFIG_OBJTOOL

2
scripts/Makefile.modfinal
View file

@ -57,7 +57,7 @@ if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \
printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:)
# Re-generate module BTFs if either module's .ko or vmlinux changed
$(modules): %.ko: %.o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE
$(modules): %.ko: %.o %.mod.o scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),vmlinux) FORCE
+$(call if_changed_except,ld_ko_o,vmlinux)
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
+$(if $(newer-prereqs),$(call cmd,btf_ko))

112
scripts/Makefile.modpost
View file

@ -32,49 +32,58 @@
# Step 4 is solely used to allow module versioning in external modules,
# where the CRC of each module is retrieved from the Module.symvers file.
# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules.
# This is solely useful to speed up test compiles
PHONY := __modpost
__modpost:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
MODPOST = scripts/mod/modpost \
modpost-args = \
$(if $(CONFIG_MODVERSIONS),-m) \
$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
-o $@
ifdef MODPOST_VMLINUX
quiet_cmd_modpost = MODPOST $@
cmd_modpost = $(MODPOST) $<
vmlinux.symvers: vmlinux.o
$(call cmd,modpost)
__modpost: vmlinux.symvers
else
# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
modpost-args += -n
endif
ifeq ($(KBUILD_EXTMOD),)
input-symdump := vmlinux.symvers
output-symdump := modules-only.symvers
# Generate the list of in-tree objects in vmlinux
# ---------------------------------------------------------------------------
quiet_cmd_cat = GEN $@
cmd_cat = cat $(real-prereqs) > $@
# This is used to retrieve symbol versions generated by genksyms.
ifdef CONFIG_MODVERSIONS
vmlinux.symvers Module.symvers: .vmlinux.objs
endif
ifneq ($(wildcard vmlinux.symvers),)
# Ignore libgcc.a
# Some architectures do '$(CC) --print-libgcc-file-name' to borrow libgcc.a
# from the toolchain, but there is no EXPORT_SYMBOL in it.
__modpost: Module.symvers
Module.symvers: vmlinux.symvers modules-only.symvers FORCE
$(call if_changed,cat)
quiet_cmd_vmlinux_objs = GEN $@
cmd_vmlinux_objs = \
for f in $(real-prereqs); do \
case $${f} in \
*libgcc.a) ;; \
*) $(AR) t $${f} ;; \
esac \
done > $@
targets += Module.symvers
targets += .vmlinux.objs
.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed,vmlinux_objs)
vmlinux.o-if-present := $(wildcard vmlinux.o)
output-symdump := vmlinux.symvers
ifdef KBUILD_MODULES
output-symdump := $(if $(vmlinux.o-if-present), Module.symvers, modules-only.symvers)
missing-input := $(filter-out $(vmlinux.o-if-present),vmlinux.o)
endif
else
@ -86,54 +95,37 @@ src := $(obj)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
include $(or $(wildcard $(src)/Kbuild), $(src)/Makefile)
# modpost option for external modules
MODPOST += -e
input-symdump := Module.symvers $(KBUILD_EXTRA_SYMBOLS)
module.symvers-if-present := $(wildcard Module.symvers)
output-symdump := $(KBUILD_EXTMOD)/Module.symvers
missing-input := $(filter-out $(module.symvers-if-present), Module.symvers)
modpost-args += -e $(addprefix -i ,$(module.symvers-if-present) $(KBUILD_EXTRA_SYMBOLS))
endif # ($(KBUILD_EXTMOD),)
ifneq ($(KBUILD_MODPOST_WARN)$(missing-input),)
modpost-args += -w
endif
existing-input-symdump := $(wildcard $(input-symdump))
modorder-if-needed := $(if $(KBUILD_MODULES), $(MODORDER))
# modpost options for modules (both in-kernel and external)
MODPOST += \
$(addprefix -i ,$(existing-input-symdump)) \
$(if $(KBUILD_NSDEPS),-d $(MODULES_NSDEPS)) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N)
# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
MODPOST += -n
endif
# Clear VPATH to not search for *.symvers in $(srctree). Check only $(objtree).
VPATH :=
$(input-symdump):
@echo >&2 'WARNING: Symbol version dump "$@" is missing.'
@echo >&2 ' Modules may not have dependencies or modversions.'
@echo >&2 ' You may get many unresolved symbol warnings.'
# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined symbols
ifneq ($(KBUILD_MODPOST_WARN)$(filter-out $(existing-input-symdump), $(input-symdump)),)
MODPOST += -w
endif
MODPOST = scripts/mod/modpost
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
quiet_cmd_modpost = MODPOST $@
cmd_modpost = sed 's/ko$$/o/' $< | $(MODPOST) -T -
$(output-symdump): $(MODORDER) $(input-symdump) FORCE
$(call if_changed,modpost)
cmd_modpost = \
$(if $(missing-input), \
echo >&2 "WARNING: $(missing-input) is missing."; \
echo >&2 " Modules may not have dependencies or modversions."; \
echo >&2 " You may get many unresolved symbol warnings.";) \
sed 's/ko$$/o/' $(or $(modorder-if-needed), /dev/null) | $(MODPOST) $(modpost-args) $(vmlinux.o-if-present) -T -
targets += $(output-symdump)
$(output-symdump): $(modorder-if-needed) $(vmlinux.o-if-present) $(moudle.symvers-if-present) $(MODPOST) FORCE
$(call if_changed,modpost)
__modpost: $(output-symdump)
ifneq ($(KBUILD_MODPOST_NOFINAL),1)
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modfinal
endif
PHONY += FORCE
FORCE:
@ -141,6 +133,4 @@ existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
endif
.PHONY: $(PHONY)

5
scripts/Makefile.package
View file

@ -29,7 +29,10 @@ KDEB_SOURCENAME ?= linux-upstream
KBUILD_PKG_ROOTCMD ?="fakeroot -u"
export KDEB_SOURCENAME
# Include only those top-level files that are needed by make, plus the GPL copy
TAR_CONTENT := $(KBUILD_ALLDIRS) .config .scmversion Makefile \
TAR_CONTENT := Documentation LICENSES arch block certs crypto drivers fs \
include init io_uring ipc kernel lib mm net samples scripts \
security sound tools usr virt \
.config .scmversion Makefile \
Kbuild Kconfig COPYING $(wildcard localversion*)
MKSPEC := $(srctree)/scripts/package/mkspec

21
scripts/Makefile.vmlinux
View file

@ -1,18 +1,37 @@
# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
# for c_flags
include $(srctree)/scripts/Makefile.lib
targets :=
quiet_cmd_cc_o_c = CC $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
%.o: %.c FORCE
$(call if_changed_dep,cc_o_c)
targets := $(MAKECMDGOALS)
ifdef CONFIG_MODULES
targets += .vmlinux.export.o
vmlinux: .vmlinux.export.o
endif
ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
# Final link of vmlinux with optional arch pass after final link
cmd_link_vmlinux = \
$< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \
$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
targets += vmlinux
vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE
+$(call if_changed_dep,link_vmlinux)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

47
scripts/Makefile.vmlinux_o
View file

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux.o
__default: vmlinux.o modules.builtin.modinfo modules.builtin
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
@ -18,7 +18,7 @@ quiet_cmd_gen_initcalls_lds = GEN $@
$(PERL) $(real-prereqs) > $@
.tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \
$(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed,gen_initcalls_lds)
targets := .tmp_initcalls.lds
@ -35,18 +35,11 @@ endif
objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION))
# Reuse objtool_args defined in scripts/Makefile.lib if LTO or IBT is enabled.
#
# Add some more flags as needed.
# --no-unreachable and --link might be added twice, but it is fine.
#
# Expand objtool_args to a simple variable to avoid circular reference.
vmlinux-objtool-args-$(delay-objtool) += $(objtool-args-y)
vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable
vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret)
objtool_args := \
$(if $(delay-objtool),$(objtool_args)) \
$(if $(CONFIG_NOINSTR_VALIDATION), --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret)) \
$(if $(CONFIG_GCOV_KERNEL), --no-unreachable) \
--link
objtool-args = $(vmlinux-objtool-args-y) --link
# Link of vmlinux.o used for section mismatch analysis
# ---------------------------------------------------------------------------
@ -55,7 +48,7 @@ quiet_cmd_ld_vmlinux.o = LD $@
cmd_ld_vmlinux.o = \
$(LD) ${KBUILD_LDFLAGS} -r -o $@ \
$(addprefix -T , $(initcalls-lds)) \
--whole-archive $(KBUILD_VMLINUX_OBJS) --no-whole-archive \
--whole-archive vmlinux.a --no-whole-archive \
--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
$(cmd_objtool)
@ -64,11 +57,35 @@ define rule_ld_vmlinux.o
$(call cmd,gen_objtooldep)
endef
vmlinux.o: $(initcalls-lds) $(KBUILD_VMLINUX_OBJS) $(KBUILD_VMLINUX_LIBS) FORCE
vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed_rule,ld_vmlinux.o)
targets += vmlinux.o
# module.builtin.modinfo
# ---------------------------------------------------------------------------
OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
targets += modules.builtin.modinfo
modules.builtin.modinfo: vmlinux.o FORCE
$(call if_changed,objcopy)
# module.builtin
# ---------------------------------------------------------------------------
# The second line aids cases where multiple modules share the same object.
quiet_cmd_modules_builtin = GEN $@
cmd_modules_builtin = \
tr '\0' '\n' < $< | \
sed -n 's/^[[:alnum:]:_]*\.file=//p' | \
tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@
targets += modules.builtin
modules.builtin: modules.builtin.modinfo FORCE
$(call if_changed,modules_builtin)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------

6
scripts/asn1_compiler.c
View file

@ -832,7 +832,7 @@ static void parse(void)
static struct element *element_list;
static struct element *alloc_elem(struct token *type)
static struct element *alloc_elem(void)
{
struct element *e = calloc(1, sizeof(*e));
if (!e) {
@ -860,7 +860,7 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
char *p;
int labelled = 0, implicit = 0;
top = element = alloc_elem(cursor);
top = element = alloc_elem();
element->class = ASN1_UNIV;
element->method = ASN1_PRIM;
element->tag = token_to_tag[cursor->token_type];
@ -939,7 +939,7 @@ static struct element *parse_type(struct token **_cursor, struct token *end,
if (!implicit)
element->method |= ASN1_CONS;
element->compound = implicit ? TAG_OVERRIDE : SEQUENCE;
element->children = alloc_elem(cursor);
element->children = alloc_elem();
element = element->children;
element->class = ASN1_UNIV;
element->method = ASN1_PRIM;

33
scripts/atomic/check-atomics.sh
View file

@ -1,33 +0,0 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Check if atomic headers are up-to-date
ATOMICDIR=$(dirname $0)
ATOMICTBL=${ATOMICDIR}/atomics.tbl
LINUXDIR=${ATOMICDIR}/../..
echo '' | sha1sum - > /dev/null 2>&1
if [ $? -ne 0 ]; then
printf "sha1sum not available, skipping atomic header checks.\n"
exit 0
fi
cat <<EOF |
linux/atomic/atomic-instrumented.h
linux/atomic/atomic-long.h
linux/atomic/atomic-arch-fallback.h
EOF
while read header; do
OLDSUM="$(tail -n 1 ${LINUXDIR}/include/${header})"
OLDSUM="${OLDSUM#// }"
NEWSUM="$(sed '$d' ${LINUXDIR}/include/${header} | sha1sum)"
NEWSUM="${NEWSUM%% *}"
if [ "${OLDSUM}" != "${NEWSUM}" ]; then
printf "warning: generated include/${header} has been modified.\n"
fi
done
exit 0

97
scripts/check-local-export
View file

@ -1,25 +1,14 @@
#!/usr/bin/env bash
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
#
# Copyright (C) 2022 Masahiro Yamada <masahiroy@kernel.org>
# Copyright (C) 2022 Owen Rafferty <owen@owenrafferty.com>
#
# Exit with error if a local exported symbol is found.
# EXPORT_SYMBOL should be used for global symbols.
set -e
# catch errors from ${NM}
set -o pipefail
# Run the last element of a pipeline in the current shell.
# Without this, the while-loop would be executed in a subshell, and
# the changes made to 'symbol_types' and 'export_symbols' would be lost.
shopt -s lastpipe
declare -A symbol_types
declare -a export_symbols
exit_code=0
pid=$$
# If there is no symbol in the object, ${NM} (both GNU nm and llvm-nm) shows
# 'no symbols' diagnostic (but exits with 0). It is harmless and hidden by
@ -29,43 +18,53 @@ exit_code=0
# TODO:
# Use --quiet instead of 2>/dev/null when we upgrade the minimum version of
# binutils to 2.37, llvm to 13.0.0.
# Then, the following line will be really simple:
# ${NM} --quiet ${1} |
# Then, the following line will be simpler:
# { ${NM} --quiet ${1} || kill 0; } |
{ ${NM} ${1} 2>/dev/null || { echo "${0}: ${NM} failed" >&2; false; } } |
while read value type name
do
# Skip the line if the number of fields is less than 3.
#
# case 1)
# For undefined symbols, the first field (value) is empty.
# The outout looks like this:
# " U _printk"
# It is unneeded to record undefined symbols.
#
# case 2)
# For Clang LTO, llvm-nm outputs a line with type 't' but empty name:
# "---------------- t"
if [[ -z ${name} ]]; then
continue
fi
{ ${NM} ${1} 2>/dev/null || { echo "${0}: ${NM} failed" >&2; kill $pid; } } |
${AWK} -v "file=${1}" '
BEGIN {
i = 0
}
# save (name, type) in the associative array
symbol_types[${name}]=${type}
# Skip the line if the number of fields is less than 3.
#
# case 1)
# For undefined symbols, the first field (value) is empty.
# The outout looks like this:
# " U _printk"
# It is unneeded to record undefined symbols.
#
# case 2)
# For Clang LTO, llvm-nm outputs a line with type t but empty name:
# "---------------- t"
!length($3) {
next
}
# append the exported symbol to the array
if [[ ${name} == __ksymtab_* ]]; then
export_symbols+=(${name#__ksymtab_})
fi
done
# save (name, type) in the associative array
{ symbol_types[$3]=$2 }
for name in "${export_symbols[@]}"
do
# nm(3) says "If lowercase, the symbol is usually local"
if [[ ${symbol_types[$name]} =~ [a-z] ]]; then
echo "$@: error: local symbol '${name}' was exported" >&2
exit_code=1
fi
done
# append the exported symbol to the array
($3 ~ /^__ksymtab_/) {
export_symbols[i] = $3
sub(/^__ksymtab_/, "", export_symbols[i])
i++
}
exit ${exit_code}
END {
exit_code = 0
for (j = 0; j < i; ++j) {
name = export_symbols[j]
# nm(3) says "If lowercase, the symbol is usually local"
if (symbol_types[name] ~ /[a-z]/) {
printf "%s: error: local symbol %s was exported\n",
file, name | "cat 1>&2"
exit_code = 1
}
}
exit exit_code
}'
exit $?

19
scripts/clang-tools/gen_compile_commands.py
View file

@ -109,20 +109,6 @@ def to_cmdfile(path):
return os.path.join(dir, '.' + base + '.cmd')
def cmdfiles_for_o(obj):
"""Generate the iterator of .cmd files associated with the object
Yield the .cmd file used to build the given object
Args:
obj: The object path
Yields:
The path to .cmd file
"""
yield to_cmdfile(obj)
def cmdfiles_for_a(archive, ar):
"""Generate the iterator of .cmd files associated with the archive.
@ -211,13 +197,10 @@ def main():
for path in paths:
# If 'path' is a directory, handle all .cmd files under it.
# Otherwise, handle .cmd files associated with the file.
# Most of built-in objects are linked via archives (built-in.a or lib.a)
# but some objects are linked to vmlinux directly.
# built-in objects are linked via vmlinux.a
# Modules are listed in modules.order.
if os.path.isdir(path):
cmdfiles = cmdfiles_in_dir(path)
elif path.endswith('.o'):
cmdfiles = cmdfiles_for_o(path)
elif path.endswith('.a'):
cmdfiles = cmdfiles_for_a(path, ar)
elif path.endswith('modules.order'):

53
scripts/head-object-list.txt Normal file
View file

@ -0,0 +1,53 @@
# Head objects
#
# The objects listed here are placed at the head of vmlinux. A typical use-case
# is an object that contains the entry point. This is kept for compatibility
# with head-y, which Kbuild used to support.
#
# A counter approach is to control the section placement by the linker script.
# The code marked as __HEAD goes into the ".head.text" section, which is placed
# before the normal ".text" section.
#
# If you can achieve the correct code ordering by linker script, please delete
# the entry from this file.
#
arch/alpha/kernel/head.o
arch/arc/kernel/head.o
arch/arm/kernel/head-nommu.o
arch/arm/kernel/head.o
arch/arm64/kernel/head.o
arch/csky/kernel/head.o
arch/hexagon/kernel/head.o
arch/ia64/kernel/head.o
arch/loongarch/kernel/head.o
arch/m68k/68000/head.o
arch/m68k/coldfire/head.o
arch/m68k/kernel/head.o
arch/m68k/kernel/sun3-head.o
arch/microblaze/kernel/head.o
arch/mips/kernel/head.o
arch/nios2/kernel/head.o
arch/openrisc/kernel/head.o
arch/parisc/kernel/head.o
arch/powerpc/kernel/head_40x.o
arch/powerpc/kernel/head_44x.o
arch/powerpc/kernel/head_64.o
arch/powerpc/kernel/head_8xx.o
arch/powerpc/kernel/head_85xx.o
arch/powerpc/kernel/head_book3s_32.o
arch/powerpc/kernel/entry_64.o
arch/powerpc/kernel/fpu.o
arch/powerpc/kernel/vector.o
arch/powerpc/kernel/prom_init.o
arch/riscv/kernel/head.o
arch/s390/kernel/head64.o
arch/sh/kernel/head_32.o
arch/sparc/kernel/head_32.o
arch/sparc/kernel/head_64.o
arch/x86/kernel/head_32.o
arch/x86/kernel/head_64.o
arch/x86/kernel/head32.o
arch/x86/kernel/head64.o
arch/x86/kernel/ebda.o
arch/x86/kernel/platform-quirks.o
arch/xtensa/kernel/head.o

54
scripts/kallsyms.c
View file

@ -18,6 +18,7 @@
*
*/
#include <getopt.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
@ -87,7 +88,7 @@ static unsigned char best_table_len[256];
static void usage(void)
{
fprintf(stderr, "Usage: kallsyms [--all-symbols] [--absolute-percpu] "
"[--base-relative] < in.map > out.S\n");
"[--base-relative] in.map > out.S\n");
exit(1);
}
@ -123,9 +124,6 @@ static bool is_ignored_symbol(const char *name, char type)
/* Symbol names that begin with the following are ignored.*/
static const char * const ignored_prefixes[] = {
"$", /* local symbols for ARM, MIPS, etc. */
".L", /* local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc. */
"__crc_", /* modversions */
"__efistub_", /* arm64 EFI stub namespace */
"__kvm_nvhe_$", /* arm64 local symbols in non-VHE KVM namespace */
"__kvm_nvhe_.L", /* arm64 local symbols in non-VHE KVM namespace */
@ -330,12 +328,19 @@ static void shrink_table(void)
}
}
static void read_map(FILE *in)
static void read_map(const char *in)
{
FILE *fp;
struct sym_entry *sym;
while (!feof(in)) {
sym = read_symbol(in);
fp = fopen(in, "r");
if (!fp) {
perror(in);
exit(1);
}
while (!feof(fp)) {
sym = read_symbol(fp);
if (!sym)
continue;
@ -346,12 +351,15 @@ static void read_map(FILE *in)
table = realloc(table, sizeof(*table) * table_size);
if (!table) {
fprintf(stderr, "out of memory\n");
fclose(fp);
exit (1);
}
}
table[table_cnt++] = sym;
}
fclose(fp);
}
static void output_label(const char *label)
@ -805,22 +813,26 @@ static void record_relative_base(void)
int main(int argc, char **argv)
{
if (argc >= 2) {
int i;
for (i = 1; i < argc; i++) {
if(strcmp(argv[i], "--all-symbols") == 0)
all_symbols = 1;
else if (strcmp(argv[i], "--absolute-percpu") == 0)
absolute_percpu = 1;
else if (strcmp(argv[i], "--base-relative") == 0)
base_relative = 1;
else
usage();
}
} else if (argc != 1)
while (1) {
static struct option long_options[] = {
{"all-symbols", no_argument, &all_symbols, 1},
{"absolute-percpu", no_argument, &absolute_percpu, 1},
{"base-relative", no_argument, &base_relative, 1},
{},
};
int c = getopt_long(argc, argv, "", long_options, NULL);
if (c == -1)
break;
if (c != 0)
usage();
}
if (optind >= argc)
usage();
read_map(stdin);
read_map(argv[optind]);
shrink_table();
if (absolute_percpu)
make_percpus_absolute();

2
scripts/kconfig/conf.c
View file

@ -551,7 +551,7 @@ static int conf_choice(struct menu *menu)
print_help(child);
continue;
}
sym_set_choice_value(sym, child->sym);
sym_set_tristate_value(child->sym, yes);
for (child = child->list; child; child = child->next) {
indent += 2;
conf(child);

5
scripts/kconfig/lkc.h
View file

@ -123,11 +123,6 @@ static inline struct symbol *sym_get_choice_value(struct symbol *sym)
return (struct symbol *)sym->curr.val;
}
static inline bool sym_set_choice_value(struct symbol *ch, struct symbol *chval)
{
return sym_set_tristate_value(chval, yes);
}
static inline bool sym_is_choice(struct symbol *sym)
{
return sym->flags & SYMBOL_CHOICE ? true : false;

72
scripts/link-vmlinux.sh
View file

@ -3,17 +3,15 @@
#
# link vmlinux
#
# vmlinux is linked from the objects selected by $(KBUILD_VMLINUX_OBJS) and
# $(KBUILD_VMLINUX_LIBS). Most are built-in.a files from top-level directories
# in the kernel tree, others are specified in arch/$(ARCH)/Makefile.
# vmlinux is linked from the objects in vmlinux.a and $(KBUILD_VMLINUX_LIBS).
# vmlinux.a contains objects that are linked unconditionally.
# $(KBUILD_VMLINUX_LIBS) are archives which are linked conditionally
# (not within --whole-archive), and do not require symbol indexes added.
#
# vmlinux
# ^
# |
# +--< $(KBUILD_VMLINUX_OBJS)
# | +--< init/built-in.a drivers/built-in.a mm/built-in.a + more
# +--< vmlinux.a
# |
# +--< $(KBUILD_VMLINUX_LIBS)
# | +--< lib/lib.a + more
@ -67,7 +65,7 @@ vmlinux_link()
objs=vmlinux.o
libs=
else
objs="${KBUILD_VMLINUX_OBJS}"
objs=vmlinux.a
libs="${KBUILD_VMLINUX_LIBS}"
fi
@ -75,6 +73,8 @@ vmlinux_link()
objs="${objs} .vmlinux.export.o"
fi
objs="${objs} init/version-timestamp.o"
if [ "${SRCARCH}" = "um" ]; then
wl=-Wl,
ld="${CC}"
@ -157,7 +157,7 @@ kallsyms()
fi
info KSYMS ${2}
${NM} -n ${1} | scripts/kallsyms ${kallsymopt} > ${2}
scripts/kallsyms ${kallsymopt} ${1} > ${2}
}
# Perform one step in kallsyms generation, including temporary linking of
@ -170,7 +170,8 @@ kallsyms_step()
kallsyms_S=${kallsyms_vmlinux}.S
vmlinux_link ${kallsyms_vmlinux} "${kallsymso_prev}" ${btf_vmlinux_bin_o}
kallsyms ${kallsyms_vmlinux} ${kallsyms_S}
mksysmap ${kallsyms_vmlinux} ${kallsyms_vmlinux}.syms
kallsyms ${kallsyms_vmlinux}.syms ${kallsyms_S}
info AS ${kallsyms_S}
${CC} ${NOSTDINC_FLAGS} ${LINUXINCLUDE} ${KBUILD_CPPFLAGS} \
@ -182,6 +183,7 @@ kallsyms_step()
# See mksymap for additional details
mksysmap()
{
info NM ${2}
${CONFIG_SHELL} "${srctree}/scripts/mksysmap" ${1} ${2}
}
@ -197,8 +199,6 @@ cleanup()
rm -f System.map
rm -f vmlinux
rm -f vmlinux.map
rm -f .vmlinux.objs
rm -f .vmlinux.export.c
}
# Use "make V=1" to debug this script
@ -213,52 +213,7 @@ if [ "$1" = "clean" ]; then
exit 0
fi
# Update version
info GEN .version
if [ -r .version ]; then
VERSION=$(expr 0$(cat .version) + 1)
echo $VERSION > .version
else
rm -f .version
echo 1 > .version
fi;
# final build of init/
${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init need-builtin=1
#link vmlinux.o
${MAKE} -f "${srctree}/scripts/Makefile.vmlinux_o"
# Generate the list of in-tree objects in vmlinux
#
# This is used to retrieve symbol versions generated by genksyms.
for f in ${KBUILD_VMLINUX_OBJS} ${KBUILD_VMLINUX_LIBS}; do
case ${f} in
*libgcc.a)
# Some architectures do '$(CC) --print-libgcc-file-name' to
# borrow libgcc.a from the toolchain.
# There is no EXPORT_SYMBOL in external objects. Ignore this.
;;
*.a)
${AR} t ${f} ;;
*)
echo ${f} ;;
esac
done > .vmlinux.objs
# modpost vmlinux.o to check for section mismatches
${MAKE} -f "${srctree}/scripts/Makefile.modpost" MODPOST_VMLINUX=1
info MODINFO modules.builtin.modinfo
${OBJCOPY} -j .modinfo -O binary vmlinux.o modules.builtin.modinfo
info GEN modules.builtin
# The second line aids cases where multiple modules share the same object.
tr '\0' '\n' < modules.builtin.modinfo | sed -n 's/^[[:alnum:]:_]*\.file=//p' |
tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$/.ko/' > modules.builtin
if is_enabled CONFIG_MODULES; then
${MAKE} -f "${srctree}/scripts/Makefile.vmlinux" .vmlinux.export.o
fi
${MAKE} -f "${srctree}/scripts/Makefile.build" obj=init init/version-timestamp.o
btf_vmlinux_bin_o=""
if is_enabled CONFIG_DEBUG_INFO_BTF; then
@ -318,7 +273,6 @@ if is_enabled CONFIG_DEBUG_INFO_BTF && is_enabled CONFIG_BPF; then
${RESOLVE_BTFIDS} vmlinux
fi
info SYSMAP System.map
mksysmap vmlinux System.map
if is_enabled CONFIG_BUILDTIME_TABLE_SORT; then
@ -331,9 +285,7 @@ fi
# step a (see comment above)
if is_enabled CONFIG_KALLSYMS; then
mksysmap ${kallsyms_vmlinux} .tmp_System.map
if ! cmp -s System.map .tmp_System.map; then
if ! cmp -s System.map ${kallsyms_vmlinux}.syms; then
echo >&2 Inconsistent kallsyms data
echo >&2 Try "make KALLSYMS_EXTRA_PASS=1" as a workaround
exit 1

96
scripts/mkcompile_h
View file

@ -1,33 +1,10 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
TARGET=$1
ARCH=$2
SMP=$3
PREEMPT=$4
PREEMPT_DYNAMIC=$5
PREEMPT_RT=$6
CC_VERSION="$7"
LD=$8
UTS_MACHINE=$1
CC_VERSION="$2"
LD=$3
# Do not expand names
set -f
# Fix the language to get consistent output
LC_ALL=C
export LC_ALL
if [ -z "$KBUILD_BUILD_VERSION" ]; then
VERSION=$(cat .version 2>/dev/null || echo 1)
else
VERSION=$KBUILD_BUILD_VERSION
fi
if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
TIMESTAMP=`date`
else
TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
fi
if test -z "$KBUILD_BUILD_USER"; then
LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
else
@ -39,63 +16,12 @@ else
LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
fi
UTS_VERSION="#$VERSION"
CONFIG_FLAGS=""
if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
LD_VERSION=$(LC_ALL=C $LD -v | head -n1 |
sed -e 's/(compatible with [^)]*)//' -e 's/[[:space:]]*$//')
if [ -n "$PREEMPT_RT" ] ; then
CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"
elif [ -n "$PREEMPT_DYNAMIC" ] ; then
CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_DYNAMIC"
elif [ -n "$PREEMPT" ] ; then
CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"
fi
# Truncate to maximum length
UTS_LEN=64
UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
# Generate a temporary compile.h
{ echo /\* This file is auto generated, version $VERSION \*/
if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
echo \#define UTS_MACHINE \"$ARCH\"
echo \#define UTS_VERSION \"$UTS_VERSION\"
printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"
LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
| sed 's/[[:space:]]*$//')
printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"
} > .tmpcompile
# Only replace the real compile.h if the new one is different,
# in order to preserve the timestamp and avoid unnecessary
# recompilations.
# We don't consider the file changed if only the date/time changed,
# unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for
# reproducible builds with that value referring to a commit timestamp).
# A kernel config change will increase the generation number, thus
# causing compile.h to be updated (including date/time) due to the
# changed comment in the
# first line.
if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
IGNORE_PATTERN="UTS_VERSION"
else
IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED"
fi
if [ -r $TARGET ] && \
grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \
grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \
cmp -s .tmpver.1 .tmpver.2; then
rm -f .tmpcompile
else
echo " UPD $TARGET"
mv -f .tmpcompile $TARGET
fi
rm -f .tmpver.1 .tmpver.2
cat <<EOF
#define UTS_MACHINE "${UTS_MACHINE}"
#define LINUX_COMPILE_BY "${LINUX_COMPILE_BY}"
#define LINUX_COMPILE_HOST "${LINUX_COMPILE_HOST}"
#define LINUX_COMPILER "${CC_VERSION}, ${LD_VERSION}"
EOF

24
scripts/mksysmap
View file

@ -37,8 +37,24 @@
# readprofile starts reading symbols when _stext is found, and
# continue until it finds a symbol which is not either of 'T', 't',
# 'W' or 'w'. __crc_ are 'A' and placed in the middle
# so we just ignore them to let readprofile continue to work.
# (At least sparc64 has __crc_ in the middle).
# 'W' or 'w'.
#
# Ignored prefixes:
# $ - local symbols for ARM, MIPS, etc.
# .L - local labels, .LBB,.Ltmpxxx,.L__unnamed_xx,.LASANPC, etc.
# __crc_ - modversions
# __kstrtab_ - EXPORT_SYMBOL (symbol name)
# __kstrtabns_ - EXPORT_SYMBOL (namespace)
#
# Ignored symbols:
# L0 - for LoongArch?
$NM -n $1 | grep -v '\( [aNUw] \)\|\(__crc_\)\|\( \$[adt]\)\|\( \.L\)\|\( L0\)' > $2
$NM -n $1 | grep -v \
-e ' [aNUw] ' \
-e ' \$' \
-e ' \.L' \
-e ' __crc_' \
-e ' __kstrtab_' \
-e ' __kstrtabns_' \
-e ' L0$' \
> $2

4
scripts/package/mkspec
View file

@ -88,10 +88,10 @@ $S
mkdir -p %{buildroot}/boot
%ifarch ia64
mkdir -p %{buildroot}/boot/efi
cp \$($MAKE image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
cp \$($MAKE -s image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
ln -s efi/vmlinuz-$KERNELRELEASE %{buildroot}/boot/
%else
cp \$($MAKE image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
cp \$($MAKE -s image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
%endif
$M $MAKE %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install
$MAKE %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install