Resguardo inicial

This commit is contained in:
lastdragon
2026-09-06 12:53:21 -06:00
parent 662efe3c2a
commit ad2088d178
94853 changed files with 43200404 additions and 0 deletions
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# SPDX-License-Identifier: GPL-2.0-only
/asn1_compiler
/gen_packed_field_checks
/generate_rust_target
/insert-sys-cert
/kallsyms
/module.lds
/recordmcount
/rustdoc_test_builder
/rustdoc_test_gen
/sign-file
/sorttable
/target.json
/tracepoint-update
/unifdef
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# SPDX-License-Identifier: GPL-2.0
####
# kbuild: Generic definitions
# Convenient variables
comma := ,
quote := "
squote := '
empty :=
space := $(empty) $(empty)
space_escape := _-_SPACE_-_
pound := \#
define newline
endef
###
# Comparison macros.
# Usage: $(call test-lt, $(CONFIG_LLD_VERSION), 150000)
#
# Use $(intcmp ...) if supported. (Make >= 4.4)
# Otherwise, fall back to the 'test' shell command.
ifeq ($(intcmp 1,0,,,y),y)
test-ge = $(intcmp $(strip $1)0, $(strip $2)0,,y,y)
test-gt = $(intcmp $(strip $1)0, $(strip $2)0,,,y)
else
test-ge = $(shell test $(strip $1)0 -ge $(strip $2)0 && echo y)
test-gt = $(shell test $(strip $1)0 -gt $(strip $2)0 && echo y)
endif
test-le = $(call test-ge, $2, $1)
test-lt = $(call test-gt, $2, $1)
###
# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
dot-target = $(dir $@).$(notdir $@)
###
# Name of target with a '.tmp_' as filename prefix. foo/bar.o => foo/.tmp_bar.o
tmp-target = $(dir $@).tmp_$(notdir $@)
###
# The temporary file to save gcc -MMD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(dot-target).d)
###
# filename of target with directory and extension stripped
basetarget = $(basename $(notdir $@))
###
# real prerequisites without phony targets
real-prereqs = $(filter-out $(PHONY), $^)
###
# Escape single quote for use in echo statements
escsq = $(subst $(squote),'\$(squote)',$1)
###
# Quote a string to pass it to C files. foo => '"foo"'
stringify = $(squote)$(quote)$1$(quote)$(squote)
###
# The path to Kbuild or Makefile. Kbuild has precedence over Makefile.
kbuild-file = $(or $(wildcard $(src)/Kbuild),$(src)/Makefile)
###
# Read a file, replacing newlines with spaces
#
# Make 4.2 or later can read a file by using its builtin function.
ifneq ($(filter-out 4.0 4.1, $(MAKE_VERSION)),)
read-file = $(subst $(newline),$(space),$(file < $1))
else
read-file = $(shell cat $1 2>/dev/null)
endif
###
# Easy method for doing a status message
kecho := :
quiet_kecho := echo
silent_kecho := :
kecho := $($(quiet)kecho)
###
# filechk is used to check if the content of a generated file is updated.
# Sample usage:
#
# filechk_sample = echo $(KERNELRELEASE)
# version.h: FORCE
# $(call filechk,sample)
#
# The rule defined shall write to stdout the content of the new file.
# The existing file will be compared with the new one.
# - If no file exist it is created
# - If the content differ the new file is used
# - If they are equal no change, and no timestamp update
define filechk
$(check-FORCE)
$(Q)set -e; \
mkdir -p $(dir $@); \
trap "rm -f $(tmp-target)" EXIT; \
{ $(filechk_$(1)); } > $(tmp-target); \
if [ ! -r $@ ] || ! cmp -s $@ $(tmp-target); then \
$(kecho) ' UPD $@'; \
mv -f $(tmp-target) $@; \
fi
endef
###
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
# Usage:
# $(Q)$(MAKE) $(build)=dir
build := -f $(srctree)/scripts/Makefile.build obj
###
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=
# Usage:
# $(Q)$(MAKE) $(clean)=dir
clean := -f $(srctree)/scripts/Makefile.clean obj
# pring log
#
# If quiet is "silent_", print nothing and sink stdout
# If quiet is "quiet_", print short log
# If quiet is empty, print short log and whole command
silent_log_print = exec >/dev/null;
quiet_log_print = $(if $(quiet_cmd_$1), echo ' $(call escsq,$(quiet_cmd_$1)$(why))';)
log_print = echo '$(pound) $(call escsq,$(or $(quiet_cmd_$1),cmd_$1 $@)$(why))'; \
echo ' $(call escsq,$(cmd_$1))';
# 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) $$$$' $(sig);))
# print and execute commands
cmd = @$(if $(cmd_$(1)),set -e; $($(quiet)log_print) $(delete-on-interrupt) $(cmd_$(1)),:)
###
# if_changed - execute command if any prerequisite is newer than
# target, or command line has changed
# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
# including used config symbols
# if_changed_rule - as if_changed but execute rule instead
# See Documentation/kbuild/makefiles.rst for more info
ifneq ($(KBUILD_NOCMDDEP),1)
# Check if both commands are the same including their order. Result is empty
# string if equal. User may override this check using make KBUILD_NOCMDDEP=1
# If the target does not exist, the *.cmd file should not be included so
# $(savedcmd_$@) gets empty. Then, target will be built even if $(newer-prereqs)
# happens to become empty.
cmd-check = $(filter-out $(subst $(space),$(space_escape),$(strip $(savedcmd_$@))), \
$(subst $(space),$(space_escape),$(strip $(cmd_$1))))
else
# We still need to detect missing targets.
cmd-check = $(if $(strip $(savedcmd_$@)),,1)
endif
# Replace >$< with >$$< to preserve $ when reloading the .cmd file
# (needed for make)
# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
# (needed for make)
# Replace >'< with >'\''< to be able to enclose the whole string in '...'
# (needed for the shell)
make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
# Find any prerequisites that are newer than target or that do not exist.
# PHONY targets skipped in both cases.
# If there is no prerequisite other than phony targets, $(newer-prereqs) becomes
# empty even if the target does not exist. cmd-check saves this corner case.
newer-prereqs = $(filter-out $(PHONY),$?)
# It is a typical mistake to forget the FORCE prerequisite. Check it here so
# no more breakage will slip in.
check-FORCE = $(if $(filter FORCE, $^),,$(warning FORCE prerequisite is missing))
if-changed-cond = $(newer-prereqs)$(cmd-check)$(check-FORCE)
# Execute command if command has changed or prerequisite(s) are updated.
if_changed = $(if $(if-changed-cond),$(cmd_and_savecmd),@:)
cmd_and_savecmd = \
$(cmd); \
printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd
# Execute the command and also postprocess generated .d dependencies file.
if_changed_dep = $(if $(if-changed-cond),$(cmd_and_fixdep),@:)
cmd_and_fixdep = \
$(cmd); \
$(objtree)/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 $(if-changed-cond),$(rule_$(1)),@:)
###
# why - tell why a target got built
# enabled by make V=2
# Output (listed in the order they are checked):
# (1) - due to target is PHONY
# (2) - due to target missing
# (3) - due to: file1.h file2.h
# (4) - due to command line change
# (5) - due to missing .cmd file
# (6) - due to target not in $(targets)
# (1) PHONY targets are always build
# (2) No target, so we better build it
# (3) Prerequisite is newer than target
# (4) The command line stored in the file named dir/.target.cmd
# differed from actual command line. This happens when compiler
# options changes
# (5) No dir/.target.cmd file (used to store command line)
# (6) No dir/.target.cmd file and target not listed in $(targets)
# This is a good hint that there is a bug in the kbuild file
ifneq ($(findstring 2, $(KBUILD_VERBOSE)),)
_why = \
$(if $(filter $@, $(PHONY)),- due to target is PHONY, \
$(if $(wildcard $@), \
$(if $(newer-prereqs),- due to: $(newer-prereqs), \
$(if $(cmd-check), \
$(if $(savedcmd_$@),- due to command line change, \
$(if $(filter $@, $(targets)), \
- due to missing .cmd file, \
- due to $(notdir $@) not in $$(targets) \
) \
) \
) \
), \
- due to target missing \
) \
)
why = $(space)$(strip $(_why))
endif
###############################################################################
# delete partially updated (i.e. corrupted) files on error
.DELETE_ON_ERROR:
# do not delete intermediate files automatically
#
# .NOTINTERMEDIATE is more correct, but only available on newer Make versions.
# Make 4.4 introduced .NOTINTERMEDIATE, and it appears in .FEATURES, but the
# global .NOTINTERMEDIATE does not work. We can use it on Make > 4.4.
# Use .SECONDARY for older Make versions, but "newer-prereq" cannot detect
# deleted files.
ifneq ($(and $(filter notintermediate, $(.FEATURES)),$(filter-out 4.4,$(MAKE_VERSION))),)
.NOTINTERMEDIATE:
else
.SECONDARY:
endif
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# SPDX-License-Identifier: GPL-2.0-only
# Kconfig helper macros
# Convenient variables
comma := ,
quote := "
squote := '
empty :=
space := $(empty) $(empty)
dollar := $
right_paren := )
left_paren := (
# $(if-success,<command>,<then>,<else>)
# Return <then> if <command> exits with 0, <else> otherwise.
if-success = $(shell,{ $(1); } >/dev/null 2>&1 && echo "$(2)" || echo "$(3)")
# $(success,<command>)
# Return y if <command> exits with 0, n otherwise
success = $(if-success,$(1),y,n)
# $(failure,<command>)
# Return n if <command> exits with 0, y otherwise
failure = $(if-success,$(1),n,y)
# $(cc-option,<flag>)
# Return y if the compiler supports <flag>, n otherwise
cc-option = $(success,trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(CC) -Werror $(CLANG_FLAGS) $(1) -c -x c /dev/null -o .tmp_$$/tmp.o)
# $(ld-option,<flag>)
# Return y if the linker supports <flag>, n otherwise
ld-option = $(success,$(LD) -v $(1))
# $(as-instr,<instr>)
# Return y if the assembler supports <instr>, n otherwise
as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) $(2) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o /dev/null -)
as-instr64 = $(as-instr,$(1),$(m64-flag))
# check if $(CC) and $(LD) exist
$(error-if,$(failure,command -v $(CC)),C compiler '$(CC)' not found)
$(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)
# Get the C compiler name, version, and error out if it is not supported.
cc-info := $(shell,$(srctree)/scripts/cc-version.sh $(CC))
$(error-if,$(success,test -z "$(cc-info)"),Sorry$(comma) this C compiler is not supported.)
cc-name := $(shell,set -- $(cc-info) && echo $1)
cc-version := $(shell,set -- $(cc-info) && echo $2)
# Get the assembler name, version, and error out if it is not supported.
as-info := $(shell,$(srctree)/scripts/as-version.sh $(CC) $(CLANG_FLAGS))
$(error-if,$(success,test -z "$(as-info)"),Sorry$(comma) this assembler is not supported.)
as-name := $(shell,set -- $(as-info) && echo $1)
as-version := $(shell,set -- $(as-info) && echo $2)
# Get the linker name, version, and error out if it is not supported.
ld-info := $(shell,$(srctree)/scripts/ld-version.sh $(LD))
$(error-if,$(success,test -z "$(ld-info)"),Sorry$(comma) this linker is not supported.)
ld-name := $(shell,set -- $(ld-info) && echo $1)
ld-version := $(shell,set -- $(ld-info) && echo $2)
# machine bit flags
# $(m32-flag): -m32 if the compiler supports it, or an empty string otherwise.
# $(m64-flag): -m64 if the compiler supports it, or an empty string otherwise.
cc-option-bit = $(if-success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null,$(1))
m32-flag := $(cc-option-bit,-m32)
m64-flag := $(cc-option-bit,-m64)
# Test whether the compiler can link userspace applications
cc_can_link_user = $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(1))
rustc-version := $(shell,$(srctree)/scripts/rustc-version.sh $(RUSTC))
rustc-llvm-version := $(shell,$(srctree)/scripts/rustc-llvm-version.sh $(RUSTC))
# $(rustc-option,<flag>)
# Return y if the Rust compiler supports <flag>, n otherwise
# If you are testing for unstable features, consider testing RUSTC_VERSION
# instead, as features may have different completeness while available.
rustc-option = $(success,trap "rm -rf .tmp_$$" EXIT; mkdir .tmp_$$; $(RUSTC) $(1) --crate-type=rlib /dev/null --out-dir=.tmp_$$ -o .tmp_$$/tmp.rlib)
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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
PARAM="-npro -kr -i8 -ts8 -sob -l80 -ss -ncs -cp1"
RES=`indent --version | cut -d' ' -f3`
if [ "$RES" = "" ]; then
exit 1
fi
V1=`echo $RES | cut -d'.' -f1`
V2=`echo $RES | cut -d'.' -f2`
V3=`echo $RES | cut -d'.' -f3`
if [ $V1 -gt 2 ]; then
PARAM="$PARAM -il0"
elif [ $V1 -eq 2 ]; then
if [ $V2 -gt 2 ]; then
PARAM="$PARAM -il0"
elif [ $V2 -eq 2 ]; then
if [ $V3 -ge 10 ]; then
PARAM="$PARAM -il0"
fi
fi
fi
indent $PARAM "$@"
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# SPDX-License-Identifier: GPL-2.0
###
# scripts contains sources for various helper programs used throughout
# the kernel for the build process.
hostprogs-always-$(CONFIG_KALLSYMS) += kallsyms
hostprogs-always-$(BUILD_C_RECORDMCOUNT) += recordmcount
hostprogs-always-$(CONFIG_BUILDTIME_TABLE_SORT) += sorttable
hostprogs-always-$(CONFIG_ASN1) += asn1_compiler
hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT) += sign-file
hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert
hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS) += rustdoc_test_builder
hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS) += rustdoc_test_gen
hostprogs-always-$(CONFIG_TRACEPOINTS) += tracepoint-update
sorttable-objs := sorttable.o elf-parse.o
tracepoint-update-objs := tracepoint-update.o elf-parse.o
ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),)
always-$(CONFIG_RUST) += target.json
filechk_rust_target = $< < include/config/auto.conf
$(obj)/target.json: scripts/generate_rust_target include/config/auto.conf FORCE
$(call filechk,rust_target)
endif
hostprogs += generate_rust_target
generate_rust_target-rust := y
rustdoc_test_builder-rust := y
rustdoc_test_gen-rust := y
HOSTCFLAGS_tracepoint-update.o = -I$(srctree)/tools/include
HOSTCFLAGS_elf-parse.o = -I$(srctree)/tools/include
HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
HOSTLDLIBS_sorttable = -lpthread
HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include
HOSTCFLAGS_sign-file.o = $(shell $(HOSTPKG_CONFIG) --cflags libcrypto 2> /dev/null)
HOSTCFLAGS_sign-file.o += -I$(srctree)/tools/include/uapi/
HOSTLDLIBS_sign-file = $(shell $(HOSTPKG_CONFIG) --libs libcrypto 2> /dev/null || echo -lcrypto)
ifdef CONFIG_UNWINDER_ORC
ifeq ($(ARCH),x86_64)
SRCARCH := x86
endif
ifeq ($(ARCH),loongarch)
SRCARCH := loongarch
endif
HOSTCFLAGS_sorttable.o += -I$(srctree)/tools/arch/$(SRCARCH)/include
HOSTCFLAGS_sorttable.o += -DUNWINDER_ORC_ENABLED
endif
ifdef CONFIG_BUILDTIME_MCOUNT_SORT
HOSTCFLAGS_sorttable.o += -DMCOUNT_SORT_ENABLED
endif
# The following programs are only built on demand
hostprogs += unifdef gen_packed_field_checks
# The module linker script is preprocessed on demand
targets += module.lds
subdir-$(CONFIG_GCC_PLUGINS) += gcc-plugins
subdir-$(CONFIG_GENKSYMS) += genksyms
subdir-$(CONFIG_GENDWARFKSYMS) += gendwarfksyms
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
subdir-$(CONFIG_SECURITY_IPE) += ipe
# Let clean descend into subdirs
subdir- += basic dtc gdb kconfig mod
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# SPDX-License-Identifier: GPL-2.0
# include/asm-generic contains a lot of files that are used
# verbatim by several architectures.
#
# This Makefile generates arch/$(SRCARCH)/include/generated/(uapi/)/asm
# headers from multiple sources:
# - a small wrapper to include the corresponding asm-generic/*.h
# is generated for each file listed as generic-y
# - uapi/asm/unistd_*.h files listed as syscalls-y are generated from
# syscall.tbl with the __NR_* macros
# - Corresponding asm/syscall_table_*.h are generated from the same input
PHONY := all
all:
src := $(srctree)/$(subst /generated,,$(obj))
syscall_abis_32 += common,32
syscall_abis_64 += common,64
syscalltbl := $(srctree)/scripts/syscall.tbl
syshdr-args := --emit-nr
# let architectures override $(syscall_abis_%) and $(syscalltbl)
-include $(srctree)/arch/$(SRCARCH)/kernel/Makefile.syscalls
include $(srctree)/scripts/Kbuild.include
-include $(kbuild-file)
syshdr := $(srctree)/scripts/syscallhdr.sh
systbl := $(srctree)/scripts/syscalltbl.sh
# $(generic)/Kbuild lists mandatory-y. Exclude um since it is a special case.
ifneq ($(SRCARCH),um)
include $(srctree)/$(generic)/Kbuild
endif
redundant := $(filter $(mandatory-y) $(generated-y), $(generic-y))
redundant += $(foreach f, $(generic-y), $(if $(wildcard $(src)/$(f)),$(f)))
redundant := $(sort $(redundant))
$(if $(redundant),\
$(warning redundant generic-y found in $(src)/Kbuild: $(redundant)))
# If arch does not implement mandatory headers, fallback to asm-generic ones.
mandatory-y := $(filter-out $(generated-y), $(mandatory-y))
generic-y += $(foreach f, $(mandatory-y), $(if $(wildcard $(src)/$(f)),,$(f)))
generic-y := $(addprefix $(obj)/, $(generic-y))
syscall-y := $(addprefix $(obj)/, $(syscall-y))
generated-y := $(addprefix $(obj)/, $(generated-y))
# Remove stale wrappers when the corresponding files are removed from generic-y
old-headers := $(wildcard $(obj)/*.h)
unwanted := $(filter-out $(generic-y) $(generated-y) $(syscall-y),$(old-headers))
quiet_cmd_wrap = WRAP $@
cmd_wrap = echo "\#include <asm-generic/$*.h>" > $@
quiet_cmd_remove = REMOVE $(unwanted)
cmd_remove = rm -f $(unwanted)
quiet_cmd_syshdr = SYSHDR $@
cmd_syshdr = $(CONFIG_SHELL) $(syshdr) \
$(if $(syshdr-args-$*),$(syshdr-args-$*),$(syshdr-args)) \
$(if $(syscall_compat),--prefix "compat$*_") \
--abis $(subst $(space),$(comma),$(strip $(syscall_abis_$*))) \
$< $@
quiet_cmd_systbl = SYSTBL $@
cmd_systbl = $(CONFIG_SHELL) $(systbl) \
$(if $(systbl-args-$*),$(systbl-args-$*),$(systbl-args)) \
--abis $(subst $(space),$(comma),$(strip $(syscall_abis_$*))) \
$< $@
all: $(generic-y) $(syscall-y)
$(if $(unwanted),$(call cmd,remove))
@:
$(obj)/%.h: $(srctree)/$(generic)/%.h
$(call cmd,wrap)
$(obj)/unistd_%.h: $(syscalltbl) $(syshdr) FORCE
$(call if_changed,syshdr)
$(obj)/unistd_compat_%.h: syscall_compat:=1
$(obj)/unistd_compat_%.h: $(syscalltbl) $(syshdr) FORCE
$(call if_changed,syshdr)
$(obj)/syscall_table_%.h: $(syscalltbl) $(systbl) FORCE
$(call if_changed,systbl)
targets := $(syscall-y)
# Create output directory. Skip it if at least one old header exists
# since we know the output directory already exists.
ifeq ($(old-headers),)
$(shell mkdir -p $(obj))
endif
PHONY += FORCE
FORCE:
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
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# SPDX-License-Identifier: GPL-2.0
# Enable available and selected Clang AutoFDO features.
CFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true
RUSTFLAGS_AUTOFDO_CLANG := $(if $(call rustc-min-version,109800),-Zdebuginfo-for-profiling,-Zdebug-info-for-profiling) -Cllvm-args=-enable-fs-discriminator=true -Cllvm-args=-improved-fs-discriminator=true
ifndef CONFIG_DEBUG_INFO
CFLAGS_AUTOFDO_CLANG += -gmlt
RUSTFLAGS_AUTOFDO_CLANG += -Cdebuginfo=line-tables-only
endif
ifdef CLANG_AUTOFDO_PROFILE
CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections
CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions
RUSTFLAGS_AUTOFDO_CLANG += -Zprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -Zfunction-sections=y
RUSTFLAGS_AUTOFDO_CLANG += -Cllvm-args=-split-machine-functions
endif
ifdef CONFIG_LTO_CLANG_THIN
ifdef CLANG_AUTOFDO_PROFILE
KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE)
endif
KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto
KBUILD_LDFLAGS += -plugin-opt=-split-machine-functions
endif
export CFLAGS_AUTOFDO_CLANG RUSTFLAGS_AUTOFDO_CLANG
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# SPDX-License-Identifier: GPL-2.0
pahole-ver := $(CONFIG_PAHOLE_VERSION)
pahole-flags-y :=
JOBS := $(patsubst -j%,%,$(filter -j%,$(MAKEFLAGS)))
ifeq ($(call test-le, $(pahole-ver), 125),y)
pahole-flags-y += --btf_gen_floats -j$(JOBS)
pahole-flags-$(call test-ge, $(pahole-ver), 125) += --skip_encoding_btf_inconsistent_proto --btf_gen_optimized
else
# Switch to using --btf_features for v1.26 and later.
pahole-flags-$(call test-ge, $(pahole-ver), 126) = -j$(JOBS) --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func,decl_tag_kfuncs
pahole-flags-$(call test-ge, $(pahole-ver), 130) += --btf_features=attributes
pahole-flags-$(call test-ge, $(pahole-ver), 131) += --btf_features=layout
endif
pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE) += --lang_exclude=rust
export PAHOLE_FLAGS := $(pahole-flags-y)
resolve-btfids-flags-y :=
resolve-btfids-flags-$(CONFIG_WERROR) += --fatal_warnings
resolve-btfids-flags-$(if $(KBUILD_EXTMOD),y) += --distill_base
resolve-btfids-flags-$(if $(KBUILD_VERBOSE),y) += --verbose
export RESOLVE_BTFIDS_FLAGS := $(resolve-btfids-flags-y)
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@@ -0,0 +1,596 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Building
# ==========================================================================
src := $(srcroot)/$(obj)
PHONY := $(obj)/
$(obj)/:
# Init all relevant variables used in kbuild files so
# 1) they have correct type
# 2) they do not inherit any value from the environment
obj-y :=
obj-m :=
lib-y :=
lib-m :=
always-y :=
always-m :=
targets :=
subdir-y :=
subdir-m :=
asflags-y :=
ccflags-y :=
rustflags-y :=
cppflags-y :=
ldflags-y :=
subdir-asflags-y :=
subdir-ccflags-y :=
# Read auto.conf if it exists, otherwise ignore
-include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.compiler
include $(kbuild-file)
include $(srctree)/scripts/Makefile.lib
# flags that take effect in current and sub directories
KBUILD_AFLAGS += $(subdir-asflags-y)
KBUILD_CFLAGS += $(subdir-ccflags-y)
KBUILD_RUSTFLAGS += $(subdir-rustflags-y)
# Figure out what we need to build from the various variables
# ===========================================================================
# When an object is listed to be built compiled-in and modular,
# only build the compiled-in version
obj-m := $(filter-out $(obj-y),$(obj-m))
# Libraries are always collected in one lib file.
# Filter out objects already built-in
lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
# Subdirectories we need to descend into
subdir-ym := $(sort $(subdir-y) $(subdir-m) \
$(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m))))
# Handle objects in subdirs:
# - If we encounter foo/ in $(obj-y), replace it by foo/built-in.a and
# foo/modules.order
# - If we encounter foo/ in $(obj-m), replace it by foo/modules.order
#
# Generate modules.order to determine modorder. Unfortunately, we don't have
# information about ordering between -y and -m subdirs. Just put -y's first.
ifdef need-modorder
obj-m := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m))
else
obj-m := $(filter-out %/, $(obj-m))
endif
ifdef need-builtin
obj-y := $(patsubst %/, %/built-in.a, $(obj-y))
else
obj-y := $(filter-out %/, $(obj-y))
endif
# Expand $(foo-objs) $(foo-y) etc. by replacing their individuals
suffix-search = $(strip $(foreach s, $3, $($(1:%$(strip $2)=%$s))))
# List composite targets that are constructed by combining other targets
multi-search = $(sort $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $m)))
# List primitive targets that are compiled from source files
real-search = $(foreach m, $1, $(if $(call suffix-search, $m, $2, $3 -), $(call suffix-search, $m, $2, $3), $m))
# If $(foo-objs), $(foo-y), $(foo-m), or $(foo-) exists, foo.o is a composite object
multi-obj-y := $(call multi-search, $(obj-y), .o, -objs -y)
multi-obj-m := $(call multi-search, $(obj-m), .o, -objs -y -m)
multi-obj-ym := $(multi-obj-y) $(multi-obj-m)
# Replace multi-part objects by their individual parts,
# including built-in.a from subdirectories
real-obj-y := $(call real-search, $(obj-y), .o, -objs -y)
real-obj-m := $(call real-search, $(obj-m), .o, -objs -y -m)
always-y += $(always-m)
# hostprogs-always-y += foo
# ... is a shorthand for
# hostprogs += foo
# always-y += foo
hostprogs += $(hostprogs-always-y) $(hostprogs-always-m)
always-y += $(hostprogs-always-y) $(hostprogs-always-m)
# userprogs-always-y is likewise.
userprogs += $(userprogs-always-y) $(userprogs-always-m)
always-y += $(userprogs-always-y) $(userprogs-always-m)
# Add subdir path
ifneq ($(obj),.)
extra-y := $(addprefix $(obj)/, $(extra-y))
always-y := $(addprefix $(obj)/, $(always-y))
targets := $(addprefix $(obj)/, $(targets))
obj-m := $(addprefix $(obj)/, $(obj-m))
lib-y := $(addprefix $(obj)/, $(lib-y))
real-obj-y := $(addprefix $(obj)/, $(real-obj-y))
real-obj-m := $(addprefix $(obj)/, $(real-obj-m))
multi-obj-m := $(addprefix $(obj)/, $(multi-obj-m))
subdir-ym := $(addprefix $(obj)/, $(subdir-ym))
endif
ifndef obj
$(warning kbuild: Makefile.build is included improperly)
endif
ifeq ($(need-modorder),)
ifneq ($(obj-m),)
$(warning $(patsubst %.o,'%.ko',$(obj-m)) will not be built even though obj-m is specified.)
$(warning You cannot use subdir-y/m to visit a module Makefile. Use obj-y/m instead.)
endif
endif
# ===========================================================================
# subdir-builtin and subdir-modorder may contain duplications. Use $(sort ...)
subdir-builtin := $(sort $(filter %/built-in.a, $(real-obj-y)))
subdir-modorder := $(sort $(filter %/modules.order, $(obj-m)))
targets-for-builtin := $(extra-y)
ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),)
targets-for-builtin += $(obj)/lib.a
endif
ifdef need-builtin
targets-for-builtin += $(obj)/built-in.a
endif
targets-for-modules := $(foreach x, o mod, \
$(patsubst %.o, %.$x, $(filter %.o, $(obj-m))))
ifdef need-modorder
targets-for-modules += $(obj)/modules.order
endif
targets += $(targets-for-builtin) $(targets-for-modules)
# Linus' kernel sanity checking tool
ifeq ($(KBUILD_CHECKSRC),1)
quiet_cmd_checksrc = CHECK $<
cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
else ifeq ($(KBUILD_CHECKSRC),2)
quiet_cmd_force_checksrc = CHECK $<
cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
endif
ifeq ($(KBUILD_EXTMOD),)
ifneq ($(KBUILD_EXTRA_WARN),)
cmd_checkdoc = PYTHONDONTWRITEBYTECODE=1 $(PYTHON3) $(KERNELDOC) -none $(KDOCFLAGS) \
$(if $(findstring 2, $(KBUILD_EXTRA_WARN)), -Wall) \
$<
endif
endif
# Compile C sources (.c)
# ---------------------------------------------------------------------------
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -fverbose-asm -S -o $@ $<
$(obj)/%.s: $(obj)/%.c FORCE
$(call if_changed_dep,cc_s_c)
quiet_cmd_cpp_i_c = CPP $(quiet_modtag) $@
cmd_cpp_i_c = $(CPP) $(c_flags) -o $@ $<
$(obj)/%.i: $(obj)/%.c FORCE
$(call if_changed_dep,cpp_i_c)
getexportsymbols = $(NM) $@ | sed -n 's/.* __export_symbol_\(.*\)/$(1)/p'
gendwarfksyms = $(objtree)/scripts/gendwarfksyms/gendwarfksyms \
$(if $(KBUILD_SYMTYPES), --symtypes $(@:.o=.symtypes)) \
$(if $(KBUILD_GENDWARFKSYMS_STABLE), --stable)
genksyms = $(objtree)/scripts/genksyms/genksyms \
$(if $(KBUILD_SYMTYPES), -T $(@:.o=.symtypes)) \
$(if $(KBUILD_PRESERVE), -p) \
$(addprefix -r , $(wildcard $(@:.o=.symref)))
# These mirror gensymtypes_S and co below, keep them in synch.
ifdef CONFIG_GENDWARFKSYMS
cmd_gensymtypes_c = $(if $(skip_gendwarfksyms),, \
$(call getexportsymbols,\1) | $(gendwarfksyms) $@)
else
cmd_gensymtypes_c = $(CPP) -D__GENKSYMS__ $(c_flags) $< | $(genksyms)
endif # CONFIG_GENDWARFKSYMS
# LLVM assembly
# Generate .ll files from .c
quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@
cmd_cc_ll_c = $(CC) $(c_flags) -emit-llvm -S -fno-discard-value-names -o $@ $<
$(obj)/%.ll: $(obj)/%.c FORCE
$(call if_changed_dep,cc_ll_c)
# C (.c) files
# The C file is compiled and updated dependency information is generated.
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
is-single-obj-m = $(and $(part-of-module),$(filter $@, $(obj-m)),y)
ifdef CONFIG_MODVERSIONS
# When module versioning is enabled the following steps are executed:
# o compile a <file>.o from <file>.c
# o if <file>.o doesn't contain a __export_symbol_*, 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 dump them into the .cmd file.
# o modpost will extract versions from that file and create *.c files that will
# be compiled and linked to the kernel and/or modules.
gen_symversions = \
if $(NM) $@ 2>/dev/null | grep -q ' __export_symbol_'; then \
$(cmd_gensymtypes_$1) >> $(dot-target).cmd; \
fi
cmd_gen_symversions_c = $(call gen_symversions,c)
endif
ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
# compiler will not generate __mcount_loc use recordmcount or recordmcount.pl
ifdef BUILD_C_RECORDMCOUNT
ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
RECORDMCOUNT_FLAGS = -w
endif
# Due to recursion, we must skip empty.o.
# The empty.o file is created in the make process in order to determine
# the target endianness and word size. It is made before all other C
# files, including recordmcount.
sub_cmd_record_mcount = \
if [ $(@) != "scripts/mod/empty.o" ]; then \
$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
fi;
recordmcount_source := $(srctree)/scripts/recordmcount.c \
$(srctree)/scripts/recordmcount.h
else
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) $(KBUILD_CFLAGS)" \
"$(LD) $(KBUILD_LDFLAGS)" "$(NM)" "$(RM)" "$(MV)" \
"$(if $(part-of-module),1,0)" "$(@)";
recordmcount_source := $(srctree)/scripts/recordmcount.pl
endif # BUILD_C_RECORDMCOUNT
cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \
$(sub_cmd_record_mcount))
endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
# '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
is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(target-stem).o)$(OBJECT_FILES_NON_STANDARD)n),$(is-kernel-object))
ifdef CONFIG_OBJTOOL
$(obj)/%.o: private objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y))
endif
ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi)))
endif
# Built-in and composite module parts
$(obj)/%.o: $(obj)/%.c $(recordmcount_source) FORCE
$(call if_changed_rule,cc_o_c)
$(call cmd,force_checksrc)
# To make this rule robust against "Argument list too long" error,
# ensure to add $(obj)/ prefix by a shell command.
cmd_mod = printf '%s\n' $(call real-search, $*.o, .o, -objs -y -m) | \
$(AWK) '!x[$$0]++ { print("$(obj)/"$$0) }' > $@
$(obj)/%.mod: FORCE
$(call if_changed,mod)
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
System.map $(OBJDUMP) > $@
$(obj)/%.lst: $(obj)/%.c FORCE
$(call if_changed_dep,cc_lst_c)
# Compile Rust sources (.rs)
# ---------------------------------------------------------------------------
# The features in this list are the ones allowed for non-`rust/` code.
#
# - Stable since Rust 1.87.0: `feature(asm_goto)`.
# - Stable since Rust 1.89.0: `feature(generic_arg_infer)`.
# - Expected to become stable: `feature(arbitrary_self_types)`.
# - To be determined: `feature(used_with_arg)`.
#
# Please see https://github.com/Rust-for-Linux/linux/issues/2 for details on
# the unstable features in use.
rust_allowed_features := arbitrary_self_types,asm_goto,generic_arg_infer,used_with_arg
# `--out-dir` is required to avoid temporaries being created by `rustc` in the
# current working directory, which may be not accessible in the out-of-tree
# modules case.
rust_common_cmd = \
OBJTREE=$(abspath $(objtree)) \
RUST_MODFILE=$(modfile) $(RUSTC_OR_CLIPPY) $(rust_flags) \
-Zallow-features=$(rust_allowed_features) \
-Zcrate-attr=no_std \
-Zcrate-attr='feature($(rust_allowed_features))' \
-Zunstable-options --extern pin_init --extern kernel \
--extern zerocopy --extern zerocopy_derive \
--crate-type rlib -L $(objtree)/rust/ \
--sysroot=/dev/null \
--out-dir $(dir $@) --emit=dep-info=$(depfile)
# `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit
# will be used. We explicitly request `-Ccodegen-units=1` in any case, and
# the compiler shows a warning if it is not 1. However, if we ever stop
# requesting it explicitly and we start using some other `--emit` that does not
# imply it (and for which codegen is performed), then we would be out of sync,
# i.e. the outputs we would get for the different single targets (e.g. `.ll`)
# would not match each other.
quiet_cmd_rustc_o_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
cmd_rustc_o_rs = $(rust_common_cmd) --emit=$(if $(CONFIG_RUST_INLINE_HELPERS),llvm-bc=$(patsubst %.o,%.bc,$@),obj=$@) $< \
$(if $(CONFIG_RUST_INLINE_HELPERS),;$(LLVM_LINK) --internalize --suppress-warnings $(patsubst %.o,%.bc,$@) \
$(objtree)/rust/helpers/helpers$(if $(part-of-module),_module).bc -o $(patsubst %.o,%.m.bc,$@); \
$(CC) $(CLANG_FLAGS) $(KBUILD_CFLAGS) -Wno-override-module -c $(patsubst %.o,%.m.bc,$@) -o $@ \
$(cmd_ld_single)) \
$(cmd_objtool)
define rule_rustc_o_rs
$(call cmd_and_fixdep,rustc_o_rs)
$(call cmd,gen_objtooldep)
endef
$(obj)/%.o: $(obj)/%.rs FORCE
+$(call if_changed_rule,rustc_o_rs)
quiet_cmd_rustc_rsi_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
cmd_rustc_rsi_rs = \
$(rust_common_cmd) -Zunpretty=expanded $< >$@; \
command -v $(RUSTFMT) >/dev/null && $(RUSTFMT) --config-path $(srctree)/.rustfmt.toml $@
$(obj)/%.rsi: $(obj)/%.rs FORCE
+$(call if_changed_dep,rustc_rsi_rs)
quiet_cmd_rustc_s_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
cmd_rustc_s_rs = $(rust_common_cmd) --emit=asm=$@ $<
$(obj)/%.s: $(obj)/%.rs FORCE
+$(call if_changed_dep,rustc_s_rs)
quiet_cmd_rustc_ll_rs = $(RUSTC_OR_CLIPPY_QUIET) $(quiet_modtag) $@
cmd_rustc_ll_rs = $(rust_common_cmd) --emit=llvm-ir=$@ $<
$(obj)/%.ll: $(obj)/%.rs FORCE
+$(call if_changed_dep,rustc_ll_rs)
quiet_cmd_rustc_rs_rs_S = RSCPP $(quiet_modtag) $@
cmd_rustc_rs_rs_S = $(CPP) $(c_flags) -xc -C -P $< | sed '1,/^\/\/ Cut here.$$/d' >$@
$(obj)/%.rs: $(obj)/%.rs.S FORCE
+$(call if_changed_dep,rustc_rs_rs_S)
# Compile assembler sources (.S)
# ---------------------------------------------------------------------------
# .S file exports must have their C prototypes defined in asm/asm-prototypes.h
# or a file that it includes, in order to get versioned symbols. We build a
# dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
# the .S file (with trailing ';'), and run genksyms on that, to extract vers.
#
# This is convoluted. The .S file must first be preprocessed to run guards and
# expand names, then the resulting exports must be constructed into plain
# EXPORT_SYMBOL(symbol); to build our dummy C file, and that gets preprocessed
# to make the genksyms input or compiled into an object for gendwarfksyms.
#
# These mirror gensymtypes_c and co above, keep them in synch.
getasmexports = \
{ echo "\#include <linux/kernel.h>" ; \
echo "\#include <linux/string.h>" ; \
echo "\#include <asm/asm-prototypes.h>" ; \
$(call getexportsymbols,EXPORT_SYMBOL(\1);) ; }
ifdef CONFIG_GENDWARFKSYMS
cmd_gensymtypes_S = \
$(getasmexports) | \
$(CC) $(c_flags) -c -o $(@:.o=.gendwarfksyms.o) -xc -; \
$(call getexportsymbols,\1) | \
$(gendwarfksyms) $(@:.o=.gendwarfksyms.o)
else
cmd_gensymtypes_S = \
$(getasmexports) | \
$(CPP) -D__GENKSYMS__ $(c_flags) -xc - | $(genksyms)
endif # CONFIG_GENDWARFKSYMS
quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@
cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $<
$(obj)/%.s: $(obj)/%.S FORCE
$(call if_changed_dep,cpp_s_S)
ifdef CONFIG_ASM_MODVERSIONS
# versioning matches the C process described above, with difference that
# we parse asm-prototypes.h C header to get function definitions.
cmd_gen_symversions_S = $(call gen_symversions,S)
endif
$(obj)/%.o: $(obj)/%.S FORCE
$(call if_changed_rule,as_o_S)
targets += $(filter-out $(subdir-builtin), $(real-obj-y))
targets += $(filter-out $(subdir-modorder), $(real-obj-m))
targets += $(lib-y) $(always-y)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
quiet_cmd_cpp_lds_S = LDS $@
cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -U$(ARCH) \
-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
$(obj)/%.lds: $(src)/%.lds.S FORCE
$(call if_changed_dep,cpp_lds_S)
# ASN.1 grammar
# ---------------------------------------------------------------------------
quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch]
cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
$(basename $@).c $(basename $@).h
$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
$(call cmd,asn1_compiler)
# Build the compiled-in targets
# ---------------------------------------------------------------------------
# To build objects in subdirs, we need to descend into the directories
$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
#
# Rule to compile a set of .o files into one .a file (without symbol table)
#
# To make this rule robust against "Argument list too long" error,
# remove $(obj)/ prefix, and restore it by a shell command.
quiet_cmd_ar_builtin = AR $@
cmd_ar_builtin = rm -f $@; \
$(if $(real-prereqs), printf "$(obj)/%s " $(patsubst $(obj)/%,%,$(real-prereqs)) | xargs) \
$(AR) cDPrST $@
$(obj)/built-in.a: $(real-obj-y) FORCE
$(call if_changed,ar_builtin)
# This is a list of build artifacts from the current Makefile and its
# sub-directories. The timestamp should be updated when any of the member files.
cmd_gen_order = { $(foreach m, $(real-prereqs), \
$(if $(filter %/$(notdir $@), $m), cat $m, echo $m);) :; } \
> $@
$(obj)/modules.order: $(obj-m) FORCE
$(call if_changed,gen_order)
#
# Rule to compile a set of .o files into one .a file (with symbol table)
#
$(obj)/lib.a: $(lib-y) FORCE
$(call if_changed,ar)
quiet_cmd_ld_multi_m = LD [M] $@
cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool)
define rule_ld_multi_m
$(call cmd_and_savecmd,ld_multi_m)
$(call cmd,gen_objtooldep)
endef
$(multi-obj-m): private objtool-enabled := $(delay-objtool)
$(multi-obj-m): private part-of-module := y
$(multi-obj-m): %.o: %.mod FORCE
$(call if_changed_rule,ld_multi_m)
$(call multi_depend, $(multi-obj-m), .o, -objs -y -m)
# Add intermediate targets:
# When building objects with specific suffix patterns, add intermediate
# targets that the final targets are derived from.
intermediate_targets = $(foreach sfx, $(2), \
$(patsubst %$(strip $(1)),%$(sfx), \
$(filter %$(strip $(1)), $(targets))))
# %.asn1.o <- %.asn1.[ch] <- %.asn1
targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h)
# Include additional build rules when necessary
# ---------------------------------------------------------------------------
# $(sort ...) is used here to remove duplicated words and excessive spaces.
hostprogs := $(sort $(hostprogs))
ifneq ($(hostprogs),)
include $(srctree)/scripts/Makefile.host
endif
# $(sort ...) is used here to remove duplicated words and excessive spaces.
userprogs := $(sort $(userprogs))
ifneq ($(userprogs),)
include $(srctree)/scripts/Makefile.userprogs
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
# ---------------------------------------------------------------------------
PHONY += $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) $(build)=$@ \
need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \
need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1) \
$(filter $@/%, $(single-subdir-goals))
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS))
targets := $(filter-out $(PHONY), $(targets))
# Now that targets is fully known, include dtb rules if needed
ifneq ($(need-dtbslist)$(dtb-y)$(dtb-)$(filter %.dtb %.dtb.o %.dtbo.o,$(targets)),)
include $(srctree)/scripts/Makefile.dtbs
endif
# Build
# Needs to be after the include of Makefile.dtbs, which updates always-y
# ---------------------------------------------------------------------------
$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
$(if $(KBUILD_MODULES), $(targets-for-modules)) \
$(subdir-ym) $(always-y)
@:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
# Create directories for object files if they do not exist
obj-dirs := $(sort $(patsubst %/,%, $(dir $(targets))))
# 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
.PHONY: $(PHONY)
+42
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@@ -0,0 +1,42 @@
# Individual arch/{arch}/Makefiles should use -EL/-EB to set intended
# endianness and -m32/-m64 to set word size based on Kconfigs instead of
# relying on the target triple.
CLANG_TARGET_FLAGS_arm := arm-linux-gnueabi
CLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu
CLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl
CLANG_TARGET_FLAGS_loongarch := loongarch64-linux-gnusf
CLANG_TARGET_FLAGS_m68k := m68k-linux-gnu
CLANG_TARGET_FLAGS_mips := mipsel-linux-gnu
CLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu
CLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu
CLANG_TARGET_FLAGS_s390 := s390x-linux-gnu
CLANG_TARGET_FLAGS_sparc := sparc64-linux-gnu
CLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu
# This is only for i386 UM builds, which need the 32-bit target not -m32
CLANG_TARGET_FLAGS_i386 := i386-linux-gnu
CLANG_TARGET_FLAGS_um := $(CLANG_TARGET_FLAGS_$(SUBARCH))
CLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(SRCARCH))
ifeq ($(CLANG_TARGET_FLAGS),)
$(error add '--target=' option to scripts/Makefile.clang)
else
CLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS)
endif
ifeq ($(LLVM_IAS),0)
CLANG_FLAGS += -fno-integrated-as
GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
else
CLANG_FLAGS += -fintegrated-as
endif
# By default, clang only warns when it encounters an unknown warning flag or
# certain optimization flags it knows it has not implemented.
# Make it behave more like gcc by erroring when these flags are encountered
# so they can be implemented or wrapped in cc-option.
CLANG_FLAGS += -Werror=unknown-warning-option
CLANG_FLAGS += -Werror=ignored-optimization-argument
CLANG_FLAGS += -Werror=option-ignored
CLANG_FLAGS += -Werror=unused-command-line-argument
KBUILD_CPPFLAGS += $(CLANG_FLAGS)
export CLANG_FLAGS
+63
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@@ -0,0 +1,63 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Cleaning up
# ==========================================================================
src := $(srcroot)/$(obj)
PHONY := __clean
__clean:
include $(srctree)/scripts/Kbuild.include
include $(kbuild-file)
# Figure out what we need to build from the various variables
# ==========================================================================
subdir-ymn := $(sort $(subdir-y) $(subdir-m) $(subdir-) \
$(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m) $(obj-))))
# Add subdir path
subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn))
# build a list of files to remove, usually relative to the current
# directory
__clean-files := \
$(clean-files) $(targets) $(hostprogs) $(userprogs) \
$(extra-y) $(extra-m) $(extra-) \
$(always-y) $(always-m) $(always-) \
$(hostprogs-always-y) $(hostprogs-always-m) $(hostprogs-always-) \
$(userprogs-always-y) $(userprogs-always-m) $(userprogs-always-)
__clean-files := $(filter-out $(no-clean-files), $(__clean-files))
__clean-files := $(wildcard $(addprefix $(obj)/, $(__clean-files)))
# ==========================================================================
# To make this rule robust against "Argument list too long" error,
# remove $(obj)/ prefix, and restore it by a shell command.
quiet_cmd_clean = CLEAN $(obj)
cmd_clean = printf '$(obj)/%s ' $(patsubst $(obj)/%,%,$(__clean-files)) | xargs rm -rf
__clean: $(subdir-ymn)
ifneq ($(strip $(__clean-files)),)
$(call cmd,clean)
endif
@:
# ===========================================================================
# Generic stuff
# ===========================================================================
# Descending
# ---------------------------------------------------------------------------
PHONY += $(subdir-ymn)
$(subdir-ymn):
$(Q)$(MAKE) $(clean)=$@
.PHONY: $(PHONY)
+93
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@@ -0,0 +1,93 @@
# SPDX-License-Identifier: GPL-2.0-only
# cc-cross-prefix
# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
# Return first <prefix> where a <prefix>gcc is found in PATH.
# If no gcc found in PATH with listed prefixes return nothing
#
# Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it
# would try to directly execute the shell builtin 'command'. This workaround
# should be kept for a long time since this issue was fixed only after the
# GNU Make 4.2.1 release.
cc-cross-prefix = $(firstword $(foreach c, $(1), \
$(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c))))
# output directory for tests below
TMPOUT = .tmp_$$$$
# try-run
# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
# Exit code chooses option. "$$TMP" serves as a temporary file and is
# automatically cleaned up.
try-run = $(shell set -e; \
TMP=$(TMPOUT)/tmp; \
trap "rm -rf $(TMPOUT)" EXIT; \
mkdir -p $(TMPOUT); \
if ($(1)) >/dev/null 2>&1; \
then echo "$(2)"; \
else echo "$(3)"; \
fi)
# as-option
# Usage: aflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
as-option = $(call try-run,\
$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(1) -c -x assembler-with-cpp /dev/null -o "$$TMP",$(1),$(2))
# as-instr
# Usage: aflags-y += $(call as-instr,instr,option1,option2)
as-instr = $(call try-run,\
printf "%b\n" "$(1)" | $(CC) -Werror $(CLANG_FLAGS) $(KBUILD_AFLAGS) -Wa$(comma)--fatal-warnings -c -x assembler-with-cpp -o "$$TMP" -,$(2),$(3))
# __cc-option
# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
__cc-option = $(call try-run,\
$(1) -Werror $(2) $(3:-Wno-%=-W%) -c -x c /dev/null -o "$$TMP",$(3),$(4))
# cc-option
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
cc-option = $(call __cc-option, $(CC),\
$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
# cc-option-yn
# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
cc-option-yn = $(if $(call cc-option,$1),y,n)
# cc-disable-warning
# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
cc-disable-warning = $(call cc-option,-Wno-$(strip $1))
# gcc-min-version
# Usage: cflags-$(call gcc-min-version, 110100) += -foo
gcc-min-version = $(call test-ge, $(CONFIG_GCC_VERSION), $1)
# clang-min-version
# Usage: cflags-$(call clang-min-version, 110000) += -foo
clang-min-version = $(call test-ge, $(CONFIG_CLANG_VERSION), $1)
# rustc-min-version
# Usage: rustc-$(call rustc-min-version, 108500) += -Cfoo
rustc-min-version = $(call test-ge, $(CONFIG_RUSTC_VERSION), $1)
# ld-option
# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
# __rustc-option
# Usage: MY_RUSTFLAGS += $(call __rustc-option,$(RUSTC),$(MY_RUSTFLAGS),-Cinstrument-coverage,-Zinstrument-coverage)
# TODO: remove RUSTC_BOOTSTRAP=1 when we raise the minimum GNU Make version to 4.4
__rustc-option = $(call try-run,\
echo '$(pound)![allow(missing_docs)]$(pound)![feature(no_core)]$(pound)![no_core]' | RUSTC_BOOTSTRAP=1\
$(1) --sysroot=/dev/null $(KBUILD_RUSTFLAGS_OPTION_CHKS) $(filter-out --sysroot=/dev/null --target=%target.json,$(2)) $(3)\
--crate-type=rlib --out-dir=$(TMPOUT) --emit=obj=- - >/dev/null,$(3),$(4))
# rustc-option
# Usage: rustflags-y += $(call rustc-option,-Cinstrument-coverage,-Zinstrument-coverage)
rustc-option = $(call __rustc-option, $(RUSTC),\
$(KBUILD_RUSTFLAGS),$(1),$(2))
# rustc-option-yn
# Usage: flag := $(call rustc-option-yn,-Cinstrument-coverage)
rustc-option-yn = $(if $(call rustc-option,$1),y,n)
@@ -0,0 +1,11 @@
# SPDX-License-Identifier: GPL-2.0
context-analysis-cflags := -DWARN_CONTEXT_ANALYSIS \
-fexperimental-late-parse-attributes -Wthread-safety \
-Wthread-safety-pointer -Wthread-safety-beta
ifndef CONFIG_WARN_CONTEXT_ANALYSIS_ALL
context-analysis-cflags += --warning-suppression-mappings=$(srctree)/scripts/context-analysis-suppression.txt
endif
export CFLAGS_CONTEXT_ANALYSIS := $(context-analysis-cflags)
+52
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@@ -0,0 +1,52 @@
DEBUG_CFLAGS :=
DEBUG_RUSTFLAGS :=
debug-flags-y := -g
ifdef CONFIG_DEBUG_INFO_SPLIT
DEBUG_CFLAGS += -gsplit-dwarf
endif
debug-flags-$(CONFIG_DEBUG_INFO_DWARF4) += -gdwarf-4
debug-flags-$(CONFIG_DEBUG_INFO_DWARF5) += -gdwarf-5
ifeq ($(CONFIG_CC_IS_CLANG)$(CONFIG_AS_IS_GNU),yy)
# Clang does not pass -g or -gdwarf-* option down to GAS.
# Add -Wa, prefix to explicitly specify the flags.
KBUILD_AFLAGS += $(addprefix -Wa$(comma), $(debug-flags-y))
endif
DEBUG_CFLAGS += $(debug-flags-y)
KBUILD_AFLAGS += $(debug-flags-y)
ifdef CONFIG_DEBUG_INFO_DWARF4
DEBUG_RUSTFLAGS += -Zdwarf-version=4
else ifdef CONFIG_DEBUG_INFO_DWARF5
DEBUG_RUSTFLAGS += -Zdwarf-version=5
endif
ifdef CONFIG_DEBUG_INFO_REDUCED
DEBUG_CFLAGS += -fno-var-tracking
DEBUG_RUSTFLAGS += -Cdebuginfo=1
ifdef CONFIG_CC_IS_GCC
DEBUG_CFLAGS += -femit-struct-debug-baseonly
endif
else
DEBUG_RUSTFLAGS += -Cdebuginfo=2
endif
ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZLIB
DEBUG_CFLAGS += -gz=zlib
DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zlib
KBUILD_AFLAGS += -gz=zlib
KBUILD_LDFLAGS += --compress-debug-sections=zlib
else ifdef CONFIG_DEBUG_INFO_COMPRESSED_ZSTD
DEBUG_CFLAGS += -gz=zstd
DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zstd
KBUILD_AFLAGS += -gz=zstd
KBUILD_LDFLAGS += --compress-debug-sections=zstd
endif
KBUILD_CFLAGS += $(DEBUG_CFLAGS)
export DEBUG_CFLAGS
KBUILD_RUSTFLAGS += $(DEBUG_RUSTFLAGS)
export DEBUG_RUSTFLAGS
+30
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@@ -0,0 +1,30 @@
# SPDX-License-Identifier: GPL-2.0
# Configuration heplers
cmd_merge_fragments = \
$(srctree)/scripts/kconfig/merge_config.sh \
$4 -m -O $(objtree) $(srctree)/arch/$(SRCARCH)/configs/$2 \
$(foreach config,$3,$(srctree)/arch/$(SRCARCH)/configs/$(config).config)
# Creates 'merged defconfigs'
# ---------------------------------------------------------------------------
# Usage:
# $(call merge_into_defconfig,base_config,config_fragment1 config_fragment2 ...)
#
# Input config fragments without '.config' suffix
define merge_into_defconfig
$(call cmd,merge_fragments,$1,$2)
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
endef
# Creates 'merged defconfigs without warning about overrides'
# ---------------------------------------------------------------------------
# Usage:
# $(call merge_into_defconfig_override,base_config,config_fragment1 config_fragment2 ...)
#
# Input config fragments without '.config' suffix
define merge_into_defconfig_override
$(call cmd,merge_fragments,$1,$2,-Q)
+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
endef
+43
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@@ -0,0 +1,43 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Installing dtb files
#
# Installs all dtb files listed in $(dtb-y) either in the
# INSTALL_DTBS_PATH directory or the default location:
#
# $INSTALL_PATH/dtbs/$KERNELRELEASE
# ==========================================================================
PHONY := __dtbs_install
__dtbs_install:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
dst := $(INSTALL_DTBS_PATH)
quiet_cmd_dtb_install = INSTALL $@
cmd_dtb_install = install -D -m 0644 $< $@
$(dst)/%: $(obj)/%
$(call cmd,dtb_install)
dtbs := $(patsubst $(obj)/%,%,$(call read-file, $(obj)/dtbs-list))
ifdef CONFIG_ARCH_WANT_FLAT_DTB_INSTALL
define gen_install_rules
$(dst)/%: $(obj)/$(1)%
$$(call cmd,dtb_install)
endef
$(foreach d, $(sort $(dir $(dtbs))), $(eval $(call gen_install_rules,$(d))))
dtbs := $(notdir $(dtbs))
endif # CONFIG_ARCH_WANT_FLAT_DTB_INSTALL
__dtbs_install: $(addprefix $(dst)/, $(dtbs))
@:
.PHONY: $(PHONY)
+153
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@@ -0,0 +1,153 @@
# SPDX-License-Identifier: GPL-2.0-only
all-dtb := $(dtb-y) $(dtb-)
# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built
dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-)
# Composite DTB (i.e. DTB constructed by overlay)
multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs)
# Primitive DTB compiled from *.dts
real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs)
# Base DTB that overlay is applied onto
base-dtb-y := $(filter %.dtb, $(call real-search, $(multi-dtb-y), .dtb, -dtbs))
# Ensure that any .dtbo is applied to at least one base .dtb. Otherwise, it
# does not get validated.
applied-dtbo := $(filter %.dtbo, \
$(call real-search, $(call multi-search, $(all-dtb), .dtb, -dtbs), .dtb, -dtbs))
unapplied-dtbo := $(filter-out $(applied-dtbo),$(filter %.dtbo, $(dtb-y)))
$(if $(unapplied-dtbo), $(warning .dtbo is not applied to any base: $(unapplied-dtbo)))
dtb-y := $(addprefix $(obj)/, $(dtb-y))
multi-dtb-y := $(addprefix $(obj)/, $(multi-dtb-y))
real-dtb-y := $(addprefix $(obj)/, $(real-dtb-y))
always-y += $(dtb-y)
targets += $(real-dtb-y)
# dtbs-list
# ---------------------------------------------------------------------------
ifdef need-dtbslist
subdir-dtbslist := $(addsuffix /dtbs-list, $(subdir-ym))
dtb-y += $(subdir-dtbslist)
always-y += $(obj)/dtbs-list
endif
$(subdir-dtbslist): $(obj)/%/dtbs-list: $(obj)/% ;
$(obj)/dtbs-list: $(dtb-y) FORCE
$(call if_changed,gen_order)
# Assembly file to wrap dtb(o)
# ---------------------------------------------------------------------------
builtin-dtb-section = $(if $(filter arch/$(SRCARCH)/boot/dts%, $(obj)),.dtb.init.rodata,.rodata)
# Generate an assembly file to wrap the output of the device tree compiler
quiet_cmd_wrap_S_dtb = WRAP $@
cmd_wrap_S_dtb = { \
symbase=__$(patsubst .%,%,$(suffix $<))_$(subst -,_,$(notdir $*)); \
echo '\#include <asm-generic/vmlinux.lds.h>'; \
echo '.section $(builtin-dtb-section),"a"'; \
echo '.balign STRUCT_ALIGNMENT'; \
echo ".global $${symbase}_begin"; \
echo "$${symbase}_begin:"; \
echo '.incbin "$<" '; \
echo ".global $${symbase}_end"; \
echo "$${symbase}_end:"; \
echo '.balign STRUCT_ALIGNMENT'; \
} > $@
$(obj)/%.dtb.S: $(obj)/%.dtb FORCE
$(call if_changed,wrap_S_dtb)
$(obj)/%.dtbo.S: $(obj)/%.dtbo FORCE
$(call if_changed,wrap_S_dtb)
# Schema check
# ---------------------------------------------------------------------------
ifneq ($(CHECK_DTBS),)
DT_CHECKER ?= dt-validate
DT_CHECKER_FLAGS ?= $(if $(DT_SCHEMA_FILES),-l $(DT_SCHEMA_FILES),-m)
DT_BINDING_DIR := Documentation/devicetree/bindings
DT_TMP_SCHEMA := $(objtree)/$(DT_BINDING_DIR)/processed-schema.json
dtb-check-enabled = $(if $(filter %.dtb, $@),y)
endif
quiet_dtb_check_tag = $(if $(dtb-check-enabled),[C], )
cmd_dtb_check = $(if $(dtb-check-enabled),; $(DT_CHECKER) $(DT_CHECKER_FLAGS) -u $(srctree)/$(DT_BINDING_DIR) -p $(DT_TMP_SCHEMA) $@ || true)
# Overlay
# ---------------------------------------------------------------------------
# NOTE:
# Do not replace $(filter %.dtb %.dtbo, $^) with $(real-prereqs). When a single
# DTB is turned into a multi-blob DTB, $^ will contain header file dependencies
# recorded in the .*.cmd file.
quiet_cmd_fdtoverlay = OVL $(quiet_dtb_check_tag) $@
cmd_fdtoverlay = $(objtree)/scripts/dtc/fdtoverlay -o $@ -i $(filter %.dtb %.dtbo, $^) $(cmd_dtb_check)
$(multi-dtb-y): $(DT_TMP_SCHEMA) FORCE
$(call if_changed,fdtoverlay)
$(call multi_depend, $(multi-dtb-y), .dtb, -dtbs)
# DTC
# ---------------------------------------------------------------------------
DTC ?= $(objtree)/scripts/dtc/dtc
DTC_FLAGS += -Wno-unique_unit_address
# Disable noisy checks by default
ifeq ($(findstring 1,$(KBUILD_EXTRA_WARN)),)
DTC_FLAGS += -Wno-unit_address_vs_reg \
-Wno-avoid_unnecessary_addr_size \
-Wno-alias_paths \
-Wno-interrupt_map \
-Wno-simple_bus_reg
else
DTC_FLAGS += -Wunique_unit_address_if_enabled
endif
ifneq ($(findstring 2,$(KBUILD_EXTRA_WARN)),)
DTC_FLAGS += -Wnode_name_chars_strict \
-Wproperty_name_chars_strict \
-Wunique_unit_address
endif
DTC_FLAGS += $(DTC_FLAGS_$(target-stem))
# Set -@ if the target is a base DTB that overlay is applied onto
DTC_FLAGS += $(if $(filter $(patsubst $(obj)/%,%,$@), $(base-dtb-y)), -@)
DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
dtc_cpp_flags = -Wp,-MMD,$(depfile).pre.tmp -nostdinc -I $(DTC_INCLUDE) -undef -D__DTS__
dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
quiet_cmd_dtc = DTC $(quiet_dtb_check_tag) $@
cmd_dtc = \
$(HOSTCC) -E $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
$(DTC) -o $@ -b 0 $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) \
$(DTC_FLAGS) -d $(depfile).dtc.tmp $(dtc-tmp) ; \
cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) \
$(cmd_dtb_check)
$(obj)/%.dtb: $(obj)/%.dts $(DTC) $(DT_TMP_SCHEMA) FORCE
$(call if_changed_dep,dtc)
$(obj)/%.dtbo: $(src)/%.dtso $(DTC) FORCE
$(call if_changed_dep,dtc)
# targets
# ---------------------------------------------------------------------------
targets += $(always-y)
# %.dtb.o <- %.dtb.S <- %.dtb <- %.dts
# %.dtbo.o <- %.dtbo.S <- %.dtbo <- %.dtso
targets += $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \
$(call intermediate_targets, .dtbo.o, .dtbo.S .dtbo)
+29
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@@ -0,0 +1,29 @@
# SPDX-License-Identifier: GPL-2.0
gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += latent_entropy_plugin.so
gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) \
+= -DLATENT_ENTROPY_PLUGIN
ifdef CONFIG_GCC_PLUGIN_LATENT_ENTROPY
DISABLE_LATENT_ENTROPY_PLUGIN += -fplugin-arg-latent_entropy_plugin-disable -ULATENT_ENTROPY_PLUGIN
endif
export DISABLE_LATENT_ENTROPY_PLUGIN
# All the plugin CFLAGS are collected here in case a build target needs to
# filter them out of the KBUILD_CFLAGS.
GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y)) -DGCC_PLUGINS
export GCC_PLUGINS_CFLAGS
# Add the flags to the build!
KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
# Some plugins are enabled outside of this Makefile, but they still need to
# be included in GCC_PLUGIN so they can get built.
gcc-plugin-external-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) \
+= randomize_layout_plugin.so
gcc-plugin-external-$(CONFIG_GCC_PLUGIN_STACKLEAK) \
+= stackleak_plugin.so
# All enabled GCC plugins are collected here for building in
# scripts/gcc-scripts/Makefile.
GCC_PLUGIN := $(gcc-plugin-y) $(gcc-plugin-external-y)
export GCC_PLUGIN
+84
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@@ -0,0 +1,84 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Installing headers
#
# All headers under include/uapi, include/generated/uapi,
# arch/<arch>/include/uapi and arch/<arch>/include/generated/uapi are
# exported.
# They are preprocessed to remove __KERNEL__ section of the file.
#
# ==========================================================================
PHONY := __headers
__headers:
include $(srctree)/scripts/Kbuild.include
src := $(srctree)/$(obj)
gen := $(objtree)/$(subst include/,include/generated/,$(obj))
dst := usr/include
-include $(src)/Kbuild
# $(filter %/, ...) is a workaround for GNU Make <= 4.2.1, where
# $(wildcard $(src)/*/) contains not only directories but also regular files.
src-subdirs := $(patsubst $(src)/%/,%,$(filter %/, $(wildcard $(src)/*/)))
gen-subdirs := $(patsubst $(gen)/%/,%,$(filter %/, $(wildcard $(gen)/*/)))
all-subdirs := $(sort $(src-subdirs) $(gen-subdirs))
src-headers := $(if $(src-subdirs), $(shell cd $(src) && find $(src-subdirs) -name '*.h'))
src-headers := $(filter-out $(no-export-headers), $(src-headers))
gen-headers := $(if $(gen-subdirs), $(shell cd $(gen) && find $(gen-subdirs) -name '*.h'))
gen-headers := $(filter-out $(no-export-headers), $(gen-headers))
# If the same header is exported from source and generated directories,
# the former takes precedence, but this should be warned.
duplicated := $(filter $(gen-headers), $(src-headers))
$(if $(duplicated), $(warning duplicated header export: $(duplicated)))
gen-headers := $(filter-out $(duplicated), $(gen-headers))
# Add dst path prefix
all-subdirs := $(addprefix $(dst)/, $(all-subdirs))
src-headers := $(addprefix $(dst)/, $(src-headers))
gen-headers := $(addprefix $(dst)/, $(gen-headers))
all-headers := $(src-headers) $(gen-headers)
# Work out what needs to be removed
old-subdirs := $(wildcard $(all-subdirs))
old-headers := $(if $(old-subdirs),$(shell find $(old-subdirs) -name '*.h'))
unwanted := $(filter-out $(all-headers), $(old-headers))
# Create directories
existing-dirs := $(sort $(dir $(old-headers)))
wanted-dirs := $(sort $(dir $(all-headers)))
new-dirs := $(filter-out $(existing-dirs), $(wanted-dirs))
$(if $(new-dirs), $(shell mkdir -p $(new-dirs)))
# Rules
quiet_cmd_install = HDRINST $@
cmd_install = $(CONFIG_SHELL) $(srctree)/scripts/headers_install.sh $< $@
$(src-headers): $(dst)/%.h: $(src)/%.h $(srctree)/scripts/headers_install.sh FORCE
$(call if_changed,install)
$(gen-headers): $(dst)/%.h: $(gen)/%.h $(srctree)/scripts/headers_install.sh FORCE
$(call if_changed,install)
quiet_cmd_remove = REMOVE $(unwanted)
cmd_remove = rm -f $(unwanted)
__headers: $(all-headers)
ifneq ($(unwanted),)
$(call cmd,remove)
endif
@:
existing-headers := $(filter $(old-headers), $(all-headers))
-include $(foreach f,$(existing-headers),$(dir $(f)).$(notdir $(f)).cmd)
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)
+165
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@@ -0,0 +1,165 @@
# SPDX-License-Identifier: GPL-2.0
# LEX
# ---------------------------------------------------------------------------
quiet_cmd_flex = LEX $@
cmd_flex = $(LEX) -o$@ -L $<
$(obj)/%.lex.c: $(src)/%.l FORCE
$(call if_changed,flex)
# YACC
# ---------------------------------------------------------------------------
quiet_cmd_bison = YACC $(basename $@).[ch]
cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $<
$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE
$(call if_changed,bison)
# ==========================================================================
# Building binaries on the host system
# Binaries are used during the compilation of the kernel, for example
# to preprocess a data file.
#
# Both C and C++ are supported, but preferred language is C for such utilities.
# Rust is also supported, but it may only be used in scenarios where a Rust
# toolchain is required to be available (e.g. when `CONFIG_RUST` is enabled).
#
# Sample syntax (see Documentation/kbuild/makefiles.rst for reference)
# hostprogs := bin2hex
# Will compile bin2hex.c and create an executable named bin2hex
#
# hostprogs := lxdialog
# lxdialog-objs := checklist.o lxdialog.o
# Will compile lxdialog.c and checklist.c, and then link the executable
# lxdialog, based on checklist.o and lxdialog.o
#
# hostprogs := qconf
# qconf-cxxobjs := qconf.o
# qconf-objs := menu.o
# Will compile qconf as a C++ program, and menu as a C program.
# They are linked as C++ code to the executable qconf
#
# hostprogs := target
# target-rust := y
# Will compile `target` as a Rust program, using `target.rs` as the crate root.
# The crate may consist of several source files.
# C code
# Executables compiled from a single .c file
host-csingle := $(foreach m,$(hostprogs), \
$(if $($(m)-objs)$($(m)-cxxobjs)$($(m)-rust),,$(m)))
# C executables linked based on several .o files
host-cmulti := $(foreach m,$(hostprogs),\
$(if $($(m)-cxxobjs)$($(m)-rust),,$(if $($(m)-objs),$(m))))
# Object (.o) files compiled from .c files
host-cobjs := $(sort $(foreach m,$(hostprogs),$($(m)-objs)))
# C++ code
# C++ executables compiled from at least one .cc file
# and zero or more .c files
host-cxxmulti := $(foreach m,$(hostprogs),$(if $($(m)-cxxobjs),$(m)))
# C++ Object (.o) files compiled from .cc files
host-cxxobjs := $(sort $(foreach m,$(host-cxxmulti),$($(m)-cxxobjs)))
# Rust code
# Executables compiled from a single Rust crate (which may consist of
# one or more .rs files)
host-rust := $(foreach m,$(hostprogs),$(if $($(m)-rust),$(m)))
host-csingle := $(addprefix $(obj)/,$(host-csingle))
host-cmulti := $(addprefix $(obj)/,$(host-cmulti))
host-cobjs := $(addprefix $(obj)/,$(host-cobjs))
host-cxxmulti := $(addprefix $(obj)/,$(host-cxxmulti))
host-cxxobjs := $(addprefix $(obj)/,$(host-cxxobjs))
host-rust := $(addprefix $(obj)/,$(host-rust))
#####
# Handle options to gcc. Support building with separate output directory
hostc_flags = -Wp,-MMD,$(depfile) \
$(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \
$(HOSTCFLAGS_$(target-stem).o)
hostcxx_flags = -Wp,-MMD,$(depfile) \
$(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
$(HOSTCXXFLAGS_$(target-stem).o)
# `--out-dir` is required to avoid temporaries being created by `rustc` in the
# current working directory, which may be not accessible in the out-of-tree
# modules case.
hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \
-Clinker-flavor=gcc -Clinker=$(HOSTCC) \
-Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \
$(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \
$(HOSTRUSTFLAGS_$(target-stem))
# $(obj) for including generated headers from checkin source files
ifdef building_out_of_srctree
hostc_flags += -I $(obj)
hostcxx_flags += -I $(obj)
endif
#####
# Compile programs on the host
# Create executable from a single .c file
# host-csingle -> Executable
quiet_cmd_host-csingle = HOSTCC $@
cmd_host-csingle = $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-csingle): $(obj)/%: $(obj)/%.c FORCE
$(call if_changed_dep,host-csingle)
# Link an executable based on list of .o files, all plain c
# host-cmulti -> executable
quiet_cmd_host-cmulti = HOSTLD $@
cmd_host-cmulti = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(addprefix $(obj)/, $($(target-stem)-objs)) \
$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-cmulti): FORCE
$(call if_changed,host-cmulti)
$(call multi_depend, $(host-cmulti), , -objs)
# Create .o file from a single .c file
# host-cobjs -> .o
quiet_cmd_host-cobjs = HOSTCC $@
cmd_host-cobjs = $(HOSTCC) $(hostc_flags) -c -o $@ $<
$(host-cobjs): $(obj)/%.o: $(obj)/%.c FORCE
$(call if_changed_dep,host-cobjs)
# Link an executable based on list of .o files, a mixture of .c and .cc
# host-cxxmulti -> executable
quiet_cmd_host-cxxmulti = HOSTLD $@
cmd_host-cxxmulti = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
$(foreach o,objs cxxobjs,\
$(addprefix $(obj)/, $($(target-stem)-$(o)))) \
$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
$(host-cxxmulti): FORCE
$(call if_changed,host-cxxmulti)
$(call multi_depend, $(host-cxxmulti), , -objs -cxxobjs)
# Create .o file from a single .cc (C++) file
quiet_cmd_host-cxxobjs = HOSTCXX $@
cmd_host-cxxobjs = $(HOSTCXX) $(hostcxx_flags) -c -o $@ $<
$(host-cxxobjs): $(obj)/%.o: $(obj)/%.cc FORCE
$(call if_changed_dep,host-cxxobjs)
# Create executable from a single Rust crate (which may consist of
# one or more `.rs` files)
# host-rust -> Executable
quiet_cmd_host-rust = HOSTRUSTC $@
cmd_host-rust = \
$(HOSTRUSTC) $(hostrust_flags) --emit=link=$@ $<
$(host-rust): $(obj)/%: $(src)/%.rs FORCE
+$(call if_changed_dep,host-rust)
targets += $(host-csingle) $(host-cmulti) $(host-cobjs) \
$(host-cxxmulti) $(host-cxxobjs) $(host-rust)
# %.lex.o <- %.lex.c <- %.l
# %.tab.o <- %.tab.[ch] <- %.y
targets += $(call intermediate_targets, .lex.o, .lex.c) \
$(call intermediate_targets, .tab.o, .tab.c .tab.h)
+106
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@@ -0,0 +1,106 @@
# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX
# Safe for compiler to generate meminstrinsic calls in uninstrumented files.
CFLAGS_KASAN_NOSANITIZE :=
else
# Don't let compiler generate memintrinsic calls in uninstrumented files
# because they are instrumented.
CFLAGS_KASAN_NOSANITIZE := -fno-builtin
endif
KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
rustc-param = $(call rustc-option, -Cllvm-args=-$(1),)
check-args = $(foreach arg,$(2),$(call $(1),$(arg)))
kasan_params :=
ifdef CONFIG_KASAN_STACK
stack_enable := 1
else
stack_enable := 0
endif
ifdef CONFIG_KASAN_GENERIC
ifdef CONFIG_KASAN_INLINE
# When the number of memory accesses in a function is less than this
# call threshold number, the compiler will use inline instrumentation.
# 10000 is chosen offhand as a sufficiently large number to make all
# kernel functions to be instrumented inline.
call_threshold := 10000
else
call_threshold := 0
endif
# First, enable -fsanitize=kernel-address together with providing the shadow
# mapping offset, as for GCC, -fasan-shadow-offset fails without -fsanitize
# (GCC accepts the shadow mapping offset via -fasan-shadow-offset instead of
# a --param like the other KASAN parameters).
# Instead of ifdef-checking the compiler, rely on cc-option.
CFLAGS_KASAN := $(call cc-option, -fsanitize=kernel-address \
-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
$(call cc-option, -fsanitize=kernel-address \
-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
# The minimum supported `rustc` version has a minimum supported LLVM
# version late enough that we can assume support for -asan-mapping-offset.
RUSTFLAGS_KASAN := -Zsanitizer=kernel-address \
-Zsanitizer-recover=kernel-address \
-Cllvm-args=-asan-mapping-offset=$(KASAN_SHADOW_OFFSET)
# Now, add other parameters enabled similarly in GCC, Clang, and rustc.
# As some of them are not supported by older compilers, these will be filtered
# through `cc-param` or `rust-param` as applicable.
kasan_params += asan-instrumentation-with-call-threshold=$(call_threshold) \
asan-stack=$(stack_enable) \
asan-instrument-allocas=1 \
asan-globals=1
# Instrument memcpy/memset/memmove calls by using instrumented __asan_mem*()
# instead. With compilers that don't support this option, compiler-inserted
# memintrinsics won't be checked by KASAN on GENERIC_ENTRY architectures.
kasan_params += asan-kernel-mem-intrinsic-prefix=1
endif # CONFIG_KASAN_GENERIC
ifdef CONFIG_KASAN_SW_TAGS
CFLAGS_KASAN := -fsanitize=kernel-hwaddress
RUSTFLAGS_KASAN := -Zsanitizer=kernel-hwaddress \
-Zsanitizer-recover=kernel-hwaddress
ifdef CONFIG_KASAN_INLINE
kasan_params += hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)
else
kasan_params += hwasan-instrument-with-calls=1
endif
kasan_params += hwasan-instrument-stack=$(stack_enable) \
hwasan-use-short-granules=0 \
hwasan-inline-all-checks=0
# Instrument memcpy/memset/memmove calls by using instrumented __(hw)asan_mem*().
ifdef CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX
ifdef CONFIG_CC_IS_GCC
kasan_params += asan-kernel-mem-intrinsic-prefix=1
else
kasan_params += hwasan-kernel-mem-intrinsic-prefix=1
endif
endif # CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX
endif # CONFIG_KASAN_SW_TAGS
# Add all as-supported KASAN LLVM parameters requested by the configuration.
CFLAGS_KASAN += $(call check-args, cc-param, $(kasan_params))
ifdef CONFIG_RUST
# Avoid calling `rustc-param` unless Rust is enabled.
RUSTFLAGS_KASAN += $(call check-args, rustc-param, $(kasan_params))
endif # CONFIG_RUST
export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE RUSTFLAGS_KASAN
+11
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@@ -0,0 +1,11 @@
# SPDX-License-Identifier: GPL-2.0-only
kcov-flags-y += -fsanitize-coverage=trace-pc
kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS) += -fsanitize-coverage=trace-cmp
kcov-rflags-y += -Cpasses=sancov-module
kcov-rflags-y += -Cllvm-args=-sanitizer-coverage-level=3
kcov-rflags-y += -Cllvm-args=-sanitizer-coverage-trace-pc
kcov-rflags-$(CONFIG_KCOV_ENABLE_COMPARISONS) += -Cllvm-args=-sanitizer-coverage-trace-compares
export CFLAGS_KCOV := $(kcov-flags-y)
export RUSTFLAGS_KCOV := $(kcov-rflags-y)
+26
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@@ -0,0 +1,26 @@
# SPDX-License-Identifier: GPL-2.0
# GCC and Clang accept backend options differently. Do not wrap in cc-option,
# because Clang accepts "--param" even if it is unused.
ifdef CONFIG_CC_IS_CLANG
cc-param = -mllvm -$(1)
else
cc-param = --param $(1)
endif
# Keep most options here optional, to allow enabling more compilers if absence
# of some options does not break KCSAN nor causes false positive reports.
kcsan-cflags := -fsanitize=thread -fno-optimize-sibling-calls \
$(call cc-option,$(call cc-param,tsan-compound-read-before-write=1),$(call cc-option,$(call cc-param,tsan-instrument-read-before-write=1))) \
$(call cc-param,tsan-distinguish-volatile=1)
ifdef CONFIG_CC_IS_GCC
# GCC started warning about operations unsupported by the TSan runtime. But
# KCSAN != TSan, so just ignore these warnings.
kcsan-cflags += -Wno-tsan
endif
ifndef CONFIG_KCSAN_WEAK_MEMORY
kcsan-cflags += $(call cc-option,$(call cc-param,tsan-instrument-func-entry-exit=0))
endif
export CFLAGS_KCSAN := $(kcsan-cflags)
+8
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@@ -0,0 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
kmsan-cflags := -fsanitize=kernel-memory
ifdef CONFIG_KMSAN_CHECK_PARAM_RETVAL
kmsan-cflags += -fsanitize-memory-param-retval
endif
export CFLAGS_KMSAN := $(kmsan-cflags)
+21
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@@ -0,0 +1,21 @@
# SPDX-License-Identifier: GPL-2.0
ifdef CONFIG_GCC_PLUGIN_STACKLEAK
kstack-erase-cflags-y += -fplugin=$(objtree)/scripts/gcc-plugins/stackleak_plugin.so
kstack-erase-cflags-y += -fplugin-arg-stackleak_plugin-track-min-size=$(CONFIG_KSTACK_ERASE_TRACK_MIN_SIZE)
kstack-erase-cflags-y += -fplugin-arg-stackleak_plugin-arch=$(SRCARCH)
kstack-erase-cflags-$(CONFIG_GCC_PLUGIN_STACKLEAK_VERBOSE) += -fplugin-arg-stackleak_plugin-verbose
DISABLE_KSTACK_ERASE := -fplugin-arg-stackleak_plugin-disable
endif
ifdef CONFIG_CC_IS_CLANG
kstack-erase-cflags-y += -fsanitize-coverage=stack-depth
kstack-erase-cflags-y += -fsanitize-coverage-stack-depth-callback-min=$(CONFIG_KSTACK_ERASE_TRACK_MIN_SIZE)
DISABLE_KSTACK_ERASE := -fno-sanitize-coverage=stack-depth
endif
KSTACK_ERASE_CFLAGS := $(kstack-erase-cflags-y)
export KSTACK_ERASE_CFLAGS DISABLE_KSTACK_ERASE
KBUILD_CFLAGS += $(KSTACK_ERASE_CFLAGS)
+515
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@@ -0,0 +1,515 @@
# SPDX-License-Identifier: GPL-2.0
# 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.
modname-multi = $(sort $(foreach m,$(multi-obj-ym),\
$(if $(filter $*.o, $(call suffix-search, $m, .o, -objs -y -m)),$(m:.o=))))
__modname = $(or $(modname-multi),$(basetarget))
modname = $(subst $(space),:,$(__modname))
modfile = $(addprefix $(obj)/,$(__modname))
# target with $(obj)/ and its suffix stripped
target-stem = $(basename $(patsubst $(obj)/%,%,$@))
# These flags are needed for modversions and compiling, so we define them here
# $(modname_flags) defines KBUILD_MODNAME as the name of the module it will
# end up in (or would, if it gets compiled in)
name-fix-token = $(subst $(comma),_,$(subst -,_,$1))
name-fix = $(call stringify,$(call name-fix-token,$1))
basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) \
-D__KBUILD_MODNAME=$(call name-fix-token,$(modname))
modfile_flags = -DKBUILD_MODFILE=$(call stringify,$(modfile))
_c_flags = $(filter-out $(CFLAGS_REMOVE_$(target-stem).o), \
$(filter-out $(ccflags-remove-y), \
$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(ccflags-y)) \
$(CFLAGS_$(target-stem).o))
_rust_flags = $(filter-out $(RUSTFLAGS_REMOVE_$(target-stem).o), \
$(filter-out $(rustflags-remove-y), \
$(KBUILD_RUSTFLAGS) $(rustflags-y)) \
$(RUSTFLAGS_$(target-stem).o))
_a_flags = $(filter-out $(AFLAGS_REMOVE_$(target-stem).o), \
$(filter-out $(asflags-remove-y), \
$(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) $(asflags-y)) \
$(AFLAGS_$(target-stem).o))
_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
#
# Enable gcov profiling flags for a file, directory or for all files depending
# on variables GCOV_PROFILE_obj.o, GCOV_PROFILE and CONFIG_GCOV_PROFILE_ALL
# (in this order)
#
ifeq ($(CONFIG_GCOV_KERNEL),y)
_c_flags += $(if $(patsubst n%,, \
$(GCOV_PROFILE_$(target-stem).o)$(GCOV_PROFILE)$(if $(is-kernel-object),$(CONFIG_GCOV_PROFILE_ALL))), \
$(CFLAGS_GCOV))
endif
#
# Enable address sanitizer flags for kernel except some files or directories
# we don't want to check (depends on variables KASAN_SANITIZE_obj.o, KASAN_SANITIZE)
#
ifeq ($(CONFIG_KASAN),y)
ifneq ($(CONFIG_KASAN_HW_TAGS),y)
_c_flags += $(if $(patsubst n%,, \
$(KASAN_SANITIZE_$(target-stem).o)$(KASAN_SANITIZE)$(is-kernel-object)), \
$(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE))
_rust_flags += $(if $(patsubst n%,, \
$(KASAN_SANITIZE_$(target-stem).o)$(KASAN_SANITIZE)$(is-kernel-object)), \
$(RUSTFLAGS_KASAN))
endif
endif
ifeq ($(CONFIG_KMSAN),y)
_c_flags += $(if $(patsubst n%,, \
$(KMSAN_SANITIZE_$(target-stem).o)$(KMSAN_SANITIZE)$(is-kernel-object)), \
$(CFLAGS_KMSAN))
_c_flags += $(if $(patsubst n%,, \
$(KMSAN_ENABLE_CHECKS_$(target-stem).o)$(KMSAN_ENABLE_CHECKS)$(is-kernel-object)), \
, -mllvm -msan-disable-checks=1)
endif
ifeq ($(CONFIG_UBSAN),y)
_c_flags += $(if $(patsubst n%,, \
$(UBSAN_SANITIZE_$(target-stem).o)$(UBSAN_SANITIZE)$(is-kernel-object)), \
$(CFLAGS_UBSAN))
_c_flags += $(if $(patsubst n%,, \
$(UBSAN_INTEGER_WRAP_$(target-stem).o)$(UBSAN_SANITIZE_$(target-stem).o)$(UBSAN_INTEGER_WRAP)$(UBSAN_SANITIZE)$(is-kernel-object)), \
$(CFLAGS_UBSAN_INTEGER_WRAP))
endif
ifeq ($(CONFIG_KCOV),y)
_c_flags += $(if $(patsubst n%,, \
$(KCOV_INSTRUMENT_$(target-stem).o)$(KCOV_INSTRUMENT)$(if $(is-kernel-object),$(CONFIG_KCOV_INSTRUMENT_ALL))), \
$(CFLAGS_KCOV))
_rust_flags += $(if $(patsubst n%,, \
$(KCOV_INSTRUMENT_$(target-stem).o)$(KCOV_INSTRUMENT)$(if $(is-kernel-object),$(CONFIG_KCOV_INSTRUMENT_ALL))), \
$(RUSTFLAGS_KCOV))
endif
#
# Enable KCSAN flags except some files or directories we don't want to check
# (depends on variables KCSAN_SANITIZE_obj.o, KCSAN_SANITIZE)
#
ifeq ($(CONFIG_KCSAN),y)
_c_flags += $(if $(patsubst n%,, \
$(KCSAN_SANITIZE_$(target-stem).o)$(KCSAN_SANITIZE)$(is-kernel-object)), \
$(CFLAGS_KCSAN))
# Some uninstrumented files provide implied barriers required to avoid false
# positives: set KCSAN_INSTRUMENT_BARRIERS for barrier instrumentation only.
_c_flags += $(if $(patsubst n%,, \
$(KCSAN_INSTRUMENT_BARRIERS_$(target-stem).o)$(KCSAN_INSTRUMENT_BARRIERS)n), \
-D__KCSAN_INSTRUMENT_BARRIERS__)
endif
#
# Enable context analysis flags only where explicitly opted in.
# (depends on variables CONTEXT_ANALYSIS_obj.o, CONTEXT_ANALYSIS)
#
ifeq ($(CONFIG_WARN_CONTEXT_ANALYSIS),y)
_c_flags += $(if $(patsubst n%,, \
$(CONTEXT_ANALYSIS_$(target-stem).o)$(CONTEXT_ANALYSIS)$(if $(is-kernel-object),$(CONFIG_WARN_CONTEXT_ANALYSIS_ALL))), \
$(CFLAGS_CONTEXT_ANALYSIS))
endif
#
# Enable AutoFDO build flags except some files or directories we don't want to
# enable (depends on variables AUTOFDO_PROFILE_obj.o and AUTOFDO_PROFILE).
#
ifeq ($(CONFIG_AUTOFDO_CLANG),y)
_c_flags += $(if $(patsubst n%,, \
$(AUTOFDO_PROFILE_$(target-stem).o)$(AUTOFDO_PROFILE)$(is-kernel-object)), \
$(CFLAGS_AUTOFDO_CLANG))
_rust_flags += $(if $(patsubst n%,, \
$(AUTOFDO_PROFILE_$(target-stem).o)$(AUTOFDO_PROFILE)$(is-kernel-object)), \
$(RUSTFLAGS_AUTOFDO_CLANG))
endif
#
# Enable Propeller build flags except some files or directories we don't want to
# enable (depends on variables AUTOFDO_PROPELLER_obj.o and PROPELLER_PROFILE).
#
ifdef CONFIG_PROPELLER_CLANG
_c_flags += $(if $(patsubst n%,, \
$(AUTOFDO_PROFILE_$(target-stem).o)$(AUTOFDO_PROFILE)$(PROPELLER_PROFILE))$(is-kernel-object), \
$(CFLAGS_PROPELLER_CLANG))
endif
# $(src) for including checkin headers from generated source files
# $(obj) for including generated headers from checkin source files
ifdef building_out_of_srctree
_c_flags += $(addprefix -I, $(src) $(obj))
_a_flags += $(addprefix -I, $(src) $(obj))
_cpp_flags += $(addprefix -I, $(src) $(obj))
endif
# If $(is-kernel-object) is 'y', this object will be linked to vmlinux or modules
is-kernel-object = $(or $(part-of-builtin),$(part-of-module))
part-of-builtin = $(if $(filter $(basename $@).o, $(real-obj-y) $(lib-y)),y)
part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
quiet_modtag = $(if $(part-of-module),[M], )
modkern_cflags = \
$(if $(part-of-module), \
$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL) $(modfile_flags))
modkern_rustflags = \
$(if $(part-of-module), \
$(KBUILD_RUSTFLAGS_MODULE) $(RUSTFLAGS_MODULE), \
$(KBUILD_RUSTFLAGS_KERNEL) $(RUSTFLAGS_KERNEL))
modkern_aflags = $(if $(part-of-module), \
$(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
$(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) $(modfile_flags))
c_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
-include $(srctree)/include/linux/compiler_types.h \
$(_c_flags) $(modkern_cflags) \
$(basename_flags) $(modname_flags)
rust_flags = $(_rust_flags) $(modkern_rustflags) @$(objtree)/include/generated/rustc_cfg
a_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
$(_a_flags) $(modkern_aflags) $(modname_flags)
cpp_flags = -Wp,-MMD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
$(_cpp_flags)
ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F))
ifdef CONFIG_OBJTOOL
objtool := $(objtree)/tools/objtool/objtool
objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label
objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr
objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake
objtool-args-$(CONFIG_X86_KERNEL_IBT) += --ibt
objtool-args-$(CONFIG_CALL_PADDING) += --prefix=$(CONFIG_FUNCTION_PADDING_BYTES)
ifdef CONFIG_CALL_PADDING
objtool-args-$(CONFIG_CFI) += --cfi
objtool-args-$(CONFIG_FINEIBT) += --fineibt
endif
objtool-args-$(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL) += --mcount
ifdef CONFIG_FTRACE_MCOUNT_USE_OBJTOOL
objtool-args-$(CONFIG_HAVE_OBJTOOL_NOP_MCOUNT) += --mnop
endif
objtool-args-$(CONFIG_UNWINDER_ORC) += --orc
objtool-args-$(CONFIG_MITIGATION_RETPOLINE) += --retpoline
objtool-args-$(CONFIG_MITIGATION_RETHUNK) += --rethunk
objtool-args-$(CONFIG_MITIGATION_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-$(or $(CONFIG_GCOV_KERNEL),$(CONFIG_KCOV)) += --no-unreachable
objtool-args-$(CONFIG_OBJTOOL_WERROR) += --werror
objtool-args = $(objtool-args-y) \
$(if $(delay-objtool), --link) \
$(if $(part-of-module), --module)
delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT),$(CONFIG_KLP_BUILD))
cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool-args) $@)
cmd_gen_objtooldep = $(if $(objtool-enabled), { echo ; echo '$@: $$(wildcard $(objtool))' ; } >> $(dot-target).cmd)
objtool-enabled := y
endif # CONFIG_OBJTOOL
# Useful for describing the dependency of composite objects
# Usage:
# $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)
define multi_depend
$(foreach m, $1, \
$(eval $m: \
$(addprefix $(obj)/, $(call suffix-search, $(patsubst $(obj)/%,%,$m), $2, $3))))
endef
# Remove ".." and "." from a path, without using "realpath"
# Usage:
# $(call normalize_path,path/to/../file)
define normalize_path
$(strip $(eval elements :=) \
$(foreach elem,$(subst /, ,$1), \
$(if $(filter-out .,$(elem)), \
$(if $(filter ..,$(elem)), \
$(eval elements := $(wordlist 2,$(words $(elements)),x $(elements))), \
$(eval elements := $(elements) $(elem))))) \
$(subst $(space),/,$(elements)))
endef
# Build commands
# ===========================================================================
# These are shared by some Makefile.* files.
ifdef CONFIG_LTO_CLANG
# Run $(LD) here to convert LLVM IR to ELF in the following cases:
# - when this object needs objtool processing, as objtool cannot process LLVM IR
# - when this is a single-object module, as modpost cannot process LLVM IR
cmd_ld_single = $(if $(objtool-enabled)$(is-single-obj-m), ; $(LD) $(ld_flags) -r -o $(tmp-target) $@; mv $(tmp-target) $@)
endif
ifdef CONFIG_LTO_CLANG_THIN_DIST
# Save the _c_flags, sliently.
quiet_cmd_save_c_flags =
saved_c_flags = $(_c_flags) $(modkern_cflags)
cmd_save_c_flags = printf '\n%s\n' 'saved_c_flags_$@ := $(call escsq,$(saved_c_flags))' >> $(dot-target).cmd
endif
quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< \
$(cmd_ld_single) \
$(cmd_objtool)
define rule_cc_o_c
$(call cmd_and_fixdep,cc_o_c)
$(call cmd,save_c_flags)
$(call cmd,checksrc)
$(call cmd,checkdoc)
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_c)
$(call cmd,record_mcount)
$(call cmd,warn_shared_object)
endef
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< $(cmd_objtool)
define rule_as_o_S
$(call cmd_and_fixdep,as_o_S)
$(call cmd,gen_objtooldep)
$(call cmd,gen_symversions_S)
$(call cmd,warn_shared_object)
endef
# Copy a file
# ===========================================================================
# 'cp' preserves permissions. If you use it to copy a file in read-only srctree,
# the copy would be read-only as well, leading to an error when executing the
# rule next time. Use 'cat' instead in order to generate a writable file.
quiet_cmd_copy = COPY $@
cmd_copy = cat $< > $@
$(obj)/%: $(src)/%_shipped
$(call cmd,copy)
# Touch a file
# ===========================================================================
quiet_cmd_touch = TOUCH $(call normalize_path,$@)
cmd_touch = touch $@
# Commands useful for building a boot image
# ===========================================================================
#
# Use as following:
#
# target: source(s) FORCE
# $(if_changed,ld/objcopy/gzip)
#
# and add target to 'targets' so that we know we have to
# read in the saved command line
# Linking
# ---------------------------------------------------------------------------
quiet_cmd_ld = LD $@
cmd_ld = $(LD) $(ld_flags) $(real-prereqs) -o $@
# Archive
# ---------------------------------------------------------------------------
quiet_cmd_ar = AR $@
cmd_ar = rm -f $@; $(AR) cDPrsT $@ $(real-prereqs)
# Objcopy
# ---------------------------------------------------------------------------
quiet_cmd_objcopy = OBJCOPY $@
cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
# Gzip
# ---------------------------------------------------------------------------
quiet_cmd_gzip = GZIP $@
cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@
# Bzip2
# ---------------------------------------------------------------------------
# Bzip2 and LZMA do not include size in file... so we have to fake that;
# append the size as a 32-bit littleendian number as gzip does.
size_append = printf $(shell \
dec_size=0; \
for F in $(real-prereqs); do \
fsize=$$($(CONFIG_SHELL) $(srctree)/scripts/file-size.sh $$F); \
dec_size=$$(expr $$dec_size + $$fsize); \
done; \
printf "%08x\n" $$dec_size | \
sed 's/\(..\)/\1 /g' | { \
read ch0 ch1 ch2 ch3; \
for ch in $$ch3 $$ch2 $$ch1 $$ch0; do \
printf '%s%03o' '\\' $$((0x$$ch)); \
done; \
} \
)
quiet_cmd_file_size = GEN $@
cmd_file_size = $(size_append) > $@
quiet_cmd_bzip2 = BZIP2 $@
cmd_bzip2 = cat $(real-prereqs) | $(KBZIP2) -9 > $@
quiet_cmd_bzip2_with_size = BZIP2 $@
cmd_bzip2_with_size = { cat $(real-prereqs) | $(KBZIP2) -9; $(size_append); } > $@
# Lzma
# ---------------------------------------------------------------------------
quiet_cmd_lzma = LZMA $@
cmd_lzma = cat $(real-prereqs) | $(LZMA) -9 > $@
quiet_cmd_lzma_with_size = LZMA $@
cmd_lzma_with_size = { cat $(real-prereqs) | $(LZMA) -9; $(size_append); } > $@
quiet_cmd_lzo = LZO $@
cmd_lzo = cat $(real-prereqs) | $(KLZOP) -9 > $@
quiet_cmd_lzo_with_size = LZO $@
cmd_lzo_with_size = { cat $(real-prereqs) | $(KLZOP) -9; $(size_append); } > $@
quiet_cmd_lz4 = LZ4 $@
cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -9 - - > $@
quiet_cmd_lz4_with_size = LZ4 $@
cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -9 - -; \
$(size_append); } > $@
# U-Boot mkimage
# ---------------------------------------------------------------------------
MKIMAGE := $(srctree)/scripts/mkuboot.sh
# SRCARCH just happens to match slightly more than ARCH (on sparc), so reduces
# the number of overrides in arch makefiles
UIMAGE_ARCH ?= $(SRCARCH)
UIMAGE_COMPRESSION ?= $(or $(2),none)
UIMAGE_OPTS-y ?=
UIMAGE_TYPE ?= kernel
UIMAGE_LOADADDR ?= arch_must_set_this
UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR)
UIMAGE_NAME ?= Linux-$(KERNELRELEASE)
quiet_cmd_uimage = UIMAGE $@
cmd_uimage = $(BASH) $(MKIMAGE) -A $(UIMAGE_ARCH) -O linux \
-C $(UIMAGE_COMPRESSION) $(UIMAGE_OPTS-y) \
-T $(UIMAGE_TYPE) \
-a $(UIMAGE_LOADADDR) -e $(UIMAGE_ENTRYADDR) \
-n '$(UIMAGE_NAME)' -d $< $@
# Flat Image Tree (FIT)
# This allows for packaging of a kernel and all devicetrees files, using
# compression.
# ---------------------------------------------------------------------------
MAKE_FIT := $(srctree)/scripts/make_fit.py
# Use this to override the compression algorithm
FIT_COMPRESSION ?= gzip
quiet_cmd_fit = FIT $@
cmd_fit = $(MAKE_FIT) -o $@ --arch $(UIMAGE_ARCH) --os linux \
--name '$(UIMAGE_NAME)' $(FIT_EXTRA_ARGS) \
$(if $(findstring 1,$(KBUILD_VERBOSE)),-v) \
$(if $(FIT_DECOMPOSE_DTBS),--decompose-dtbs) \
--compress $(FIT_COMPRESSION) -k $< @$(word 2,$^)
# XZ
# ---------------------------------------------------------------------------
# Use xzkern or xzkern_with_size to compress the kernel image and xzmisc to
# compress other things.
#
# xzkern uses a big LZMA2 dictionary since it doesn't increase memory usage
# of the kernel decompressor. A BCJ filter is used if it is available for
# the target architecture.
#
# xzkern_with_size also appends uncompressed size of the data using
# size_append. The .xz format has the size information available at the end
# of the file too, but it's in more complex format and it's good to avoid
# changing the part of the boot code that reads the uncompressed size.
# Note that the bytes added by size_append will make the xz tool think that
# the file is corrupt. This is expected.
#
# xzmisc doesn't use size_append, so it can be used to create normal .xz
# files. xzmisc uses smaller LZMA2 dictionary than xzkern, because a very
# big dictionary would increase the memory usage too much in the multi-call
# decompression mode. A BCJ filter isn't used either.
quiet_cmd_xzkern = XZKERN $@
cmd_xzkern = cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh > $@
quiet_cmd_xzkern_with_size = XZKERN $@
cmd_xzkern_with_size = { cat $(real-prereqs) | sh $(srctree)/scripts/xz_wrap.sh; \
$(size_append); } > $@
quiet_cmd_xzmisc = XZMISC $@
cmd_xzmisc = cat $(real-prereqs) | $(XZ) --check=crc32 --lzma2=dict=1MiB > $@
# ZSTD
# ---------------------------------------------------------------------------
# Appends the uncompressed size of the data using size_append. The .zst
# format has the size information available at the beginning of the file too,
# but it's in a more complex format and it's good to avoid changing the part
# of the boot code that reads the uncompressed size.
#
# Note that the bytes added by size_append will make the zstd tool think that
# the file is corrupt. This is expected.
#
# zstd uses a maximum window size of 8 MB. zstd22 uses a maximum window size of
# 128 MB. zstd22 is used for kernel compression because it is decompressed in a
# single pass, so zstd doesn't need to allocate a window buffer. When streaming
# decompression is used, like initramfs decompression, zstd22 should likely not
# be used because it would require zstd to allocate a 128 MB buffer.
quiet_cmd_zstd = ZSTD $@
cmd_zstd = cat $(real-prereqs) | $(ZSTD) -19 > $@
quiet_cmd_zstd22 = ZSTD22 $@
cmd_zstd22 = cat $(real-prereqs) | $(ZSTD) -22 --ultra > $@
quiet_cmd_zstd22_with_size = ZSTD22 $@
cmd_zstd22_with_size = { cat $(real-prereqs) | $(ZSTD) -22 --ultra; $(size_append); } > $@
# ASM offsets
# ---------------------------------------------------------------------------
# Default sed regexp - multiline due to syntax constraints
#
# Use [:space:] because LLVM's integrated assembler inserts <tab> around
# the .ascii directive whereas GCC keeps the <space> as-is.
define sed-offsets
's:^[[:space:]]*\.ascii[[:space:]]*"\(.*\)".*:\1:; \
/^->/{s:->#\(.*\):/* \1 */:; \
s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \
s:->::; p;}'
endef
# Use filechk to avoid rebuilds when a header changes, but the resulting file
# does not
define filechk_offsets
echo "#ifndef $2"; \
echo "#define $2"; \
echo "/*"; \
echo " * DO NOT MODIFY."; \
echo " *"; \
echo " * This file was generated by Kbuild"; \
echo " */"; \
echo ""; \
sed -ne $(sed-offsets) < $<; \
echo ""; \
echo "#endif"
endef
+74
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@@ -0,0 +1,74 @@
# SPDX-License-Identifier: GPL-2.0-only
# ===========================================================================
# Module final link
# ===========================================================================
PHONY := __modfinal
__modfinal:
include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
# find all modules listed in modules.order
modules := $(call read-file, modules.order)
__modfinal: $(modules:%.o=%.ko)
@:
# modname and part-of-module are set to make c_flags define proper module flags
modname = $(notdir $(@:.mod.o=))
part-of-module = y
GCOV_PROFILE := n
ccflags-remove-y := $(CC_FLAGS_CFI)
%.mod.o: %.mod.c FORCE
$(call if_changed_rule,cc_o_c)
.module-common.o: $(srctree)/scripts/module-common.c FORCE
$(call if_changed_rule,cc_o_c)
ifneq ($(WARN_ON_UNUSED_TRACEPOINTS),)
cmd_check_tracepoint = $(objtree)/scripts/tracepoint-update --module $<;
endif
quiet_cmd_ld_ko_o = LD [M] $@
cmd_ld_ko_o = \
$(LD) -r $(KBUILD_LDFLAGS) \
$(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \
-T $(objtree)/scripts/module.lds -o $@ $(filter %.o, $^)
quiet_cmd_btf_ko = BTF [M] $@
cmd_btf_ko = \
if [ ! -f $(objtree)/vmlinux ]; then \
printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \
else \
$(CONFIG_SHELL) $(srctree)/scripts/gen-btf.sh --btf_base $(objtree)/vmlinux $@; \
fi;
# Re-generate module BTFs if either module's .ko or vmlinux changed
%.ko: %.o %.mod.o .module-common.o $(objtree)/scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),$(objtree)/vmlinux) FORCE
+$(call if_changed,ld_ko_o)
ifdef CONFIG_DEBUG_INFO_BTF_MODULES
+$(if $(newer-prereqs),$(call cmd,btf_ko))
endif
+$(call cmd,check_tracepoint)
targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) .module-common.o
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+167
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@@ -0,0 +1,167 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# Installing modules
# ==========================================================================
PHONY := __modinst
__modinst:
include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
install-y :=
ifeq ($(KBUILD_EXTMOD)$(sign-only),)
# remove the old directory and symlink
$(shell rm -fr $(MODLIB)/kernel $(MODLIB)/build)
install-$(CONFIG_MODULES) += $(addprefix $(MODLIB)/, build modules.order)
$(MODLIB)/build: FORCE
$(call cmd,symlink)
quiet_cmd_symlink = SYMLINK $@
cmd_symlink = ln -s $(CURDIR) $@
$(MODLIB)/modules.order: modules.order FORCE
$(call cmd,install_modorder)
quiet_cmd_install_modorder = INSTALL $@
cmd_install_modorder = sed 's:^\(.*\)\.o$$:kernel/\1.ko:' $< > $@
# Install modules.builtin(.modinfo,.ranges) even when CONFIG_MODULES is disabled.
install-y += $(addprefix $(MODLIB)/, modules.builtin modules.builtin.modinfo)
install-$(CONFIG_BUILTIN_MODULE_RANGES) += $(MODLIB)/modules.builtin.ranges
$(addprefix $(MODLIB)/, modules.builtin modules.builtin.modinfo modules.builtin.ranges): $(MODLIB)/%: % FORCE
$(call cmd,install)
endif
modules := $(call read-file, modules.order)
ifeq ($(KBUILD_EXTMOD),)
dst := $(MODLIB)/kernel
else
INSTALL_MOD_DIR ?= updates
dst := $(MODLIB)/$(INSTALL_MOD_DIR)
endif
$(foreach x, % :, $(if $(findstring $x, $(dst)), \
$(error module installation path cannot contain '$x')))
suffix-y :=
ifdef CONFIG_MODULE_COMPRESS_ALL
suffix-$(CONFIG_MODULE_COMPRESS_GZIP) := .gz
suffix-$(CONFIG_MODULE_COMPRESS_XZ) := .xz
suffix-$(CONFIG_MODULE_COMPRESS_ZSTD) := .zst
endif
modules := $(patsubst %.o, $(dst)/%.ko$(suffix-y), $(modules))
install-$(CONFIG_MODULES) += $(modules)
__modinst: $(install-y)
@:
#
# Installation
#
quiet_cmd_install = INSTALL $@
cmd_install = cp $< $@
# Strip
#
# INSTALL_MOD_STRIP, if defined, will cause modules to be stripped after they
# are installed. If INSTALL_MOD_STRIP is '1', then the default option
# --strip-debug will be used. Otherwise, INSTALL_MOD_STRIP value will be used
# as the options to the strip command.
ifdef INSTALL_MOD_STRIP
ifeq ($(INSTALL_MOD_STRIP),1)
strip-option := --strip-debug
else
strip-option := $(INSTALL_MOD_STRIP)
endif
quiet_cmd_strip = STRIP $@
cmd_strip = $(STRIP) $(strip-option) $@
else
quiet_cmd_strip =
cmd_strip = :
endif
#
# Signing
# Don't stop modules_install even if we can't sign external modules.
#
ifeq ($(filter pkcs11:%, $(CONFIG_MODULE_SIG_KEY)),)
sig-key := $(if $(wildcard $(CONFIG_MODULE_SIG_KEY)),,$(objtree)/)$(CONFIG_MODULE_SIG_KEY)
else
sig-key := $(CONFIG_MODULE_SIG_KEY)
endif
quiet_cmd_sign = SIGN $@
cmd_sign = $(objtree)/scripts/sign-file $(CONFIG_MODULE_SIG_HASH) "$(sig-key)" $(objtree)/certs/signing_key.x509 $@ \
$(if $(KBUILD_EXTMOD),|| true)
ifeq ($(sign-only),)
# During modules_install, modules are signed only when CONFIG_MODULE_SIG_ALL=y.
ifndef CONFIG_MODULE_SIG_ALL
quiet_cmd_sign :=
cmd_sign := :
endif
# Create necessary directories
$(foreach dir, $(sort $(dir $(install-y))), $(shell mkdir -p $(dir)))
$(dst)/%.ko: %.ko FORCE
$(call cmd,install)
$(call cmd,strip)
$(call cmd,sign)
ifdef CONFIG_MODULES
__modinst: depmod
PHONY += depmod
depmod: $(install-y)
$(call cmd,depmod)
quiet_cmd_depmod = DEPMOD $(MODLIB)
cmd_depmod = $(srctree)/scripts/depmod.sh $(KERNELRELEASE)
endif
else
$(dst)/%.ko: FORCE
$(call cmd,sign)
endif
#
# Compression
#
quiet_cmd_gzip = GZIP $@
cmd_gzip = $(KGZIP) -n -f $<
quiet_cmd_xz = XZ $@
cmd_xz = $(XZ) --check=crc32 --lzma2=dict=1MiB -f $<
quiet_cmd_zstd = ZSTD $@
cmd_zstd = $(ZSTD) --rm -f -q $<
$(dst)/%.ko.gz: $(dst)/%.ko FORCE
$(call cmd,gzip)
$(dst)/%.ko.xz: $(dst)/%.ko FORCE
$(call cmd,xz)
$(dst)/%.ko.zst: $(dst)/%.ko FORCE
$(call cmd,zstd)
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)
+157
View File
@@ -0,0 +1,157 @@
# SPDX-License-Identifier: GPL-2.0
# ===========================================================================
# Module versions
# ===========================================================================
#
# Stage one of module building created the following:
# a) The individual .o files used for the module
# b) A <module>.o file which is the .o files above linked together
# c) A <module>.mod file, listing the name of the preliminary <module>.o file,
# plus all .o files
# d) modules.order, which lists all the modules
# Stage 2 is handled by this file and does the following
# 1) Find all modules listed in modules.order
# 2) modpost is then used to
# 3) create one <module>.mod.c file per module
# 4) create one Module.symvers file with CRC for all exported symbols
# Step 3 is used to place certain information in the module's ELF
# section, including information such as:
# Version magic (see include/linux/vermagic.h for full details)
# - Kernel release
# - SMP is CONFIG_SMP
# - PREEMPT is CONFIG_PREEMPT[_RT]
# - GCC Version
# Module info
# - Module version (MODULE_VERSION)
# - Module alias'es (MODULE_ALIAS)
# - Module license (MODULE_LICENSE)
# - See include/linux/module.h for more details
# 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.
PHONY := __modpost
__modpost:
include $(objtree)/include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
MODPOST = $(objtree)/scripts/mod/modpost
modpost-args = \
$(if $(CONFIG_MODULES),-M) \
$(if $(CONFIG_MODVERSIONS),-m) \
$(if $(CONFIG_BASIC_MODVERSIONS),-b) \
$(if $(CONFIG_EXTENDED_MODVERSIONS),-x) \
$(if $(CONFIG_MODULE_SRCVERSION_ALL),-a) \
$(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \
$(if $(KBUILD_MODPOST_WARN),-w) \
$(if $(KBUILD_NSDEPS),-d modules.nsdeps) \
$(if $(CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS)$(KBUILD_NSDEPS),-N) \
$(if $(findstring 1, $(KBUILD_EXTRA_WARN)),-W) \
-o $@
modpost-deps := $(MODPOST)
# 'make -i -k' ignores compile errors, and builds as many modules as possible.
ifneq ($(findstring i,$(filter-out --%,$(MAKEFLAGS))),)
modpost-args += -n
endif
# Read out modules.order to pass in modpost.
# Otherwise, allmodconfig would fail with "Argument list too long".
ifdef KBUILD_MODULES
modpost-args += -T modules.order
modpost-deps += modules.order
endif
ifeq ($(KBUILD_EXTMOD),)
# Generate the list of in-tree objects in vmlinux
# ---------------------------------------------------------------------------
# This is used to retrieve symbol versions generated by genksyms.
ifdef CONFIG_MODVERSIONS
vmlinux.symvers Module.symvers: .vmlinux.objs
endif
# 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.
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 += .vmlinux.objs
.vmlinux.objs: vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed,vmlinux_objs)
ifdef CONFIG_TRIM_UNUSED_KSYMS
ksym-wl := $(CONFIG_UNUSED_KSYMS_WHITELIST)
ksym-wl := $(if $(filter-out /%, $(ksym-wl)),$(if $(wildcard $(ksym-wl)),,$(srctree)/))$(ksym-wl)
modpost-args += -t $(addprefix -u , $(ksym-wl))
modpost-deps += $(ksym-wl)
endif
ifeq ($(wildcard vmlinux.o),)
missing-input := vmlinux.o
output-symdump := modules-only.symvers
else
modpost-args += vmlinux.o
modpost-deps += vmlinux.o
output-symdump := $(if $(KBUILD_MODULES), Module.symvers, vmlinux.symvers)
endif
else
# set src + obj - they may be used in the modules's Makefile
obj := .
src := $(srcroot)
# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
include $(kbuild-file)
output-symdump := Module.symvers
ifeq ($(wildcard $(objtree)/Module.symvers),)
missing-input := $(objtree)/Module.symvers
else
modpost-args += -i $(objtree)/Module.symvers
modpost-deps += $(objtree)/Module.symvers
endif
modpost-args += -e $(addprefix -i , $(KBUILD_EXTRA_SYMBOLS))
endif # ($(KBUILD_EXTMOD),)
quiet_cmd_modpost = 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 errors."; \
echo >&2 " You can set KBUILD_MODPOST_WARN=1 to turn errors into warning"; \
echo >&2 " if you want to proceed at your own risk.";) \
$(MODPOST) $(modpost-args)
targets += $(output-symdump)
$(output-symdump): $(modpost-deps) FORCE
$(call if_changed,modpost)
__modpost: $(output-symdump)
PHONY += FORCE
FORCE:
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+286
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@@ -0,0 +1,286 @@
# SPDX-License-Identifier: GPL-2.0-only
# Makefile for the different targets used to generate full packages of a kernel
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
# Git
# ---------------------------------------------------------------------------
filechk_HEAD = git -C $(srctree) rev-parse --verify HEAD 2>/dev/null
.tmp_HEAD: check-git FORCE
$(call filechk,HEAD)
PHONY += check-git
check-git:
@if ! $(srctree)/scripts/check-git; then \
echo >&2 "error: creating source package requires git repository"; \
false; \
fi
git-config-tar.gz = -c tar.tar.gz.command="$(KGZIP)"
git-config-tar.bz2 = -c tar.tar.bz2.command="$(KBZIP2)"
git-config-tar.lzma = -c tar.tar.lzma.command="$(LZMA)"
git-config-tar.xz = -c tar.tar.xz.command="$(XZ)"
git-config-tar.zst = -c tar.tar.zst.command="$(ZSTD)"
quiet_cmd_archive = ARCHIVE $@
cmd_archive = git -C $(srctree) $(git-config-tar$(suffix $@)) archive \
--output=$$(realpath $@) $(archive-args)
suffix-gzip := .gz
suffix-bzip2 := .bz2
suffix-lzma := .lzma
suffix-xz := .xz
# Linux source tarball
# ---------------------------------------------------------------------------
linux-tarballs := $(addprefix linux, .tar.gz .tar.bz2 .tar.lzma .tar.xz)
targets += $(linux-tarballs)
$(linux-tarballs): archive-args = --prefix=linux/ $$(cat $<)
$(linux-tarballs): .tmp_HEAD FORCE
$(call if_changed,archive)
# rpm-pkg srcrpm-pkg binrpm-pkg
# ---------------------------------------------------------------------------
quiet_cmd_mkspec = GEN $@
cmd_mkspec = $(srctree)/scripts/package/mkspec $@
rpmbuild/SPECS/kernel.spec: FORCE
$(call cmd,mkspec)
PHONY += rpm-sources
rpm-sources: linux.tar.gz
$(Q)mkdir -p rpmbuild/SOURCES
$(Q)ln -f linux.tar.gz rpmbuild/SOURCES/linux.tar.gz
$(Q)cp $(KCONFIG_CONFIG) rpmbuild/SOURCES/config
$(Q)$(srctree)/scripts/package/gen-diff-patch rpmbuild/SOURCES/diff.patch
PHONY += rpm-pkg srcrpm-pkg binrpm-pkg
ifneq ($(CC),$(HOSTCC))
rpm-no-devel = --without=devel
endif
rpm-pkg: private build-type := a
srcrpm-pkg: private build-type := s
binrpm-pkg: private build-type := b
rpm-pkg srcrpm-pkg: rpm-sources
rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec
+$(strip rpmbuild -b$(build-type) rpmbuild/SPECS/kernel.spec \
--define='_topdir $(abspath rpmbuild)' \
$(if $(filter a b, $(build-type)), \
--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \
$$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps) \
$(rpm-no-devel)) \
$(RPMOPTS))
# deb-pkg srcdeb-pkg bindeb-pkg
# ---------------------------------------------------------------------------
KDEB_SOURCE_COMPRESS ?= gzip
supported-deb-source-compress := gzip bzip2 lzma xz
PHONY += linux.tar.unsupported-deb-src-compress
linux.tar.unsupported-deb-src-compress:
@echo "error: KDEB_SOURCE_COMPRESS=$(KDEB_SOURCE_COMPRESS) is not supported. The supported values are: $(supported-deb-source-compress)" >&2
@false
debian-orig-suffix := \
$(strip $(if $(filter $(supported-deb-source-compress), $(KDEB_SOURCE_COMPRESS)), \
$(suffix-$(KDEB_SOURCE_COMPRESS)),.unsupported-deb-src-compress))
quiet_cmd_debianize = GEN $@
cmd_debianize = $(srctree)/scripts/package/mkdebian $(mkdebian-opts)
debian: FORCE
$(call cmd,debianize)
PHONY += debian-orig
debian-orig: private source = $(shell dpkg-parsechangelog -S Source)
debian-orig: private version = $(shell dpkg-parsechangelog -S Version | sed 's/-[^-]*$$//')
debian-orig: private orig-name = $(source)_$(version).orig.tar$(debian-orig-suffix)
debian-orig: mkdebian-opts = --need-source
debian-orig: linux.tar$(debian-orig-suffix) debian
$(Q)if [ "$$(df --output=target .. 2>/dev/null)" = "$$(df --output=target $< 2>/dev/null)" ]; then \
ln -f $< ../$(orig-name); \
else \
cp $< ../$(orig-name); \
fi
PHONY += deb-pkg srcdeb-pkg bindeb-pkg
deb-pkg: private build-type := source,binary
srcdeb-pkg: private build-type := source
bindeb-pkg: private build-type := binary
deb-pkg srcdeb-pkg: debian-orig
bindeb-pkg: debian
deb-pkg srcdeb-pkg bindeb-pkg:
+$(strip dpkg-buildpackage \
--build=$(build-type) --no-pre-clean --unsigned-changes \
$(if $(findstring source, $(build-type)), \
--unsigned-source --compression=$(KDEB_SOURCE_COMPRESS)) \
$(if $(findstring binary, $(build-type)), \
-R'$(MAKE) -f debian/rules' -j1 -a$$(cat debian/arch), \
--no-check-builddeps) \
$(DPKG_FLAGS))
# snap-pkg
# ---------------------------------------------------------------------------
PHONY += snap-pkg
snap-pkg:
rm -rf $(objtree)/snap
mkdir $(objtree)/snap
$(MAKE) clean
sed "s@KERNELRELEASE@$(KERNELRELEASE)@; \
s@SRCTREE@$(realpath $(srctree))@" \
$(srctree)/scripts/package/snapcraft.template > \
$(objtree)/snap/snapcraft.yaml
cd $(objtree)/snap && \
snapcraft --target-arch=$(UTS_MACHINE)
# pacman-pkg
# ---------------------------------------------------------------------------
PHONY += pacman-pkg
pacman-pkg:
@ln -srf $(srctree)/scripts/package/PKGBUILD $(objtree)/PKGBUILD
+BUILDDIR="$(realpath $(objtree))/pacman" \
CARCH="$(UTS_MACHINE)" \
KBUILD_MAKEFLAGS="$(MAKEFLAGS)" \
KBUILD_REVISION="$(shell $(srctree)/scripts/build-version)" \
makepkg $(MAKEPKGOPTS)
# dir-pkg tar*-pkg - tarball targets
# ---------------------------------------------------------------------------
tar-install: FORCE
$(Q)$(MAKE) -f $(srctree)/Makefile
+$(Q)$(srctree)/scripts/package/buildtar $@
compress-tar.gz = -I "$(KGZIP)"
compress-tar.bz2 = -I "$(KBZIP2)"
compress-tar.xz = -I "$(XZ)"
compress-tar.zst = -I "$(ZSTD)"
quiet_cmd_tar = TAR $@
cmd_tar = cd $<; tar cf ../$@ $(compress-tar$(suffix $@)) --owner=root --group=root --sort=name *
dir-tarballs := $(addprefix linux-$(KERNELRELEASE)-$(ARCH), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst)
$(dir-tarballs): tar-install
$(call cmd,tar)
PHONY += dir-pkg
dir-pkg: tar-install
@echo "Kernel tree successfully created in $<"
PHONY += tar-pkg
tar-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar
@:
tar%-pkg: linux-$(KERNELRELEASE)-$(ARCH).tar.% FORCE
@:
# modules-cpio-pkg - generate an initramfs with the modules
# ---------------------------------------------------------------------------
.tmp_modules_cpio: FORCE
$(Q)$(MAKE) -f $(srctree)/Makefile
$(Q)rm -rf $@
$(Q)$(MAKE) -f $(srctree)/Makefile INSTALL_MOD_PATH=$@/$(INSTALL_MOD_PATH) modules_install
quiet_cmd_cpio = CPIO $@
cmd_cpio = $(CONFIG_SHELL) $(srctree)/usr/gen_initramfs.sh -o $@ $<
modules-$(KERNELRELEASE)-$(ARCH).cpio: .tmp_modules_cpio
$(call cmd,cpio)
PHONY += modules-cpio-pkg
modules-cpio-pkg: modules-$(KERNELRELEASE)-$(ARCH).cpio
@:
# perf-tar*-src-pkg - generate a source tarball with perf source
# ---------------------------------------------------------------------------
.tmp_perf:
$(Q)mkdir .tmp_perf
.tmp_perf/HEAD: .tmp_HEAD | .tmp_perf
$(call cmd,copy)
quiet_cmd_perf_version_file = GEN $@
cmd_perf_version_file = cd $(srctree)/tools/perf; util/PERF-VERSION-GEN $(dir $(abspath $@))
# PERF-VERSION-FILE and .tmp_HEAD are independent, but this avoids updating the
# timestamp of PERF-VERSION-FILE.
# The best is to fix tools/perf/util/PERF-VERSION-GEN.
.tmp_perf/PERF-VERSION-FILE: .tmp_HEAD $(srctree)/tools/perf/util/PERF-VERSION-GEN | .tmp_perf
$(call cmd,perf_version_file)
perf-archive-args = --add-file=$$(realpath $(word 2, $^)) \
--add-file=$$(realpath $(word 3, $^)) \
$$(cat $(word 2, $^))^{tree} $$(cat $<)
perf-tarballs := $(addprefix perf-$(KERNELVERSION), .tar .tar.gz .tar.bz2 .tar.xz .tar.zst)
targets += $(perf-tarballs)
$(perf-tarballs): archive-args = --prefix=perf-$(KERNELVERSION)/ $(perf-archive-args)
$(perf-tarballs): tools/perf/MANIFEST .tmp_perf/HEAD .tmp_perf/PERF-VERSION-FILE FORCE
$(call if_changed,archive)
PHONY += perf-tar-src-pkg
perf-tar-src-pkg: perf-$(KERNELVERSION).tar
@:
perf-tar%-src-pkg: perf-$(KERNELVERSION).tar.% FORCE
@:
# Help text displayed when executing 'make help'
# ---------------------------------------------------------------------------
PHONY += help
help:
@echo ' rpm-pkg - Build both source and binary RPM kernel packages'
@echo ' srcrpm-pkg - Build only the source kernel RPM package'
@echo ' binrpm-pkg - Build only the binary kernel RPM package'
@echo ' deb-pkg - Build both source and binary deb kernel packages'
@echo ' srcdeb-pkg - Build only the source kernel deb package'
@echo ' bindeb-pkg - Build only the binary kernel deb package'
@echo ' snap-pkg - Build only the binary kernel snap package'
@echo ' (will connect to external hosts)'
@echo ' pacman-pkg - Build only the binary kernel pacman package'
@echo ' dir-pkg - Build the kernel as a plain directory structure'
@echo ' tar-pkg - Build the kernel as an uncompressed tarball'
@echo ' targz-pkg - Build the kernel as a gzip compressed tarball'
@echo ' tarbz2-pkg - Build the kernel as a bzip2 compressed tarball'
@echo ' tarxz-pkg - Build the kernel as a xz compressed tarball'
@echo ' tarzst-pkg - Build the kernel as a zstd compressed tarball'
@echo ' modules-cpio-pkg - Build the kernel modules as cpio archive'
@echo ' (uses INSTALL_MOD_PATH inside the archive)'
@echo ' perf-tar-src-pkg - Build the perf source tarball with no compression'
@echo ' perf-targz-src-pkg - Build the perf source tarball with gzip compression'
@echo ' perf-tarbz2-src-pkg - Build the perf source tarball with bz2 compression'
@echo ' perf-tarxz-src-pkg - Build the perf source tarball with xz compression'
@echo ' perf-tarzst-src-pkg - Build the perf source tarball with zst compression'
PHONY += FORCE
FORCE:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+39
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@@ -0,0 +1,39 @@
# SPDX-License-Identifier: GPL-2.0
# Enable available and selected Clang Propeller features.
ifdef CLANG_PROPELLER_PROFILE_PREFIX
CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=list=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt -ffunction-sections
KBUILD_LDFLAGS += --symbol-ordering-file=$(CLANG_PROPELLER_PROFILE_PREFIX)_ld_profile.txt --no-warn-symbol-ordering
else
# Starting with Clang v20, the '-fbasic-block-sections=labels' option is
# deprecated. Use the recommended '-fbasic-block-address-map' option.
# Link: https://github.com/llvm/llvm-project/pull/110039
ifeq ($(call clang-min-version, 200000),y)
CFLAGS_PROPELLER_CLANG := -fbasic-block-address-map
else
CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=labels
endif
endif
# Propeller requires debug information to embed module names in the profiles.
# If CONFIG_DEBUG_INFO is not enabled, set -gmlt option. Skip this for AutoFDO,
# as the option should already be set.
ifndef CONFIG_DEBUG_INFO
ifndef CONFIG_AUTOFDO_CLANG
CFLAGS_PROPELLER_CLANG += -gmlt
endif
endif
ifdef CONFIG_LTO_CLANG_THIN
ifdef CLANG_PROPELLER_PROFILE_PREFIX
KBUILD_LDFLAGS += --lto-basic-block-sections=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt
else
ifeq ($(call test-ge, $(CONFIG_LLD_VERSION), 200000),y)
KBUILD_LDFLAGS += --lto-basic-block-address-map
else
KBUILD_LDFLAGS += --lto-basic-block-sections=labels
endif
endif
endif
export CFLAGS_PROPELLER_CLANG
+17
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@@ -0,0 +1,17 @@
# SPDX-License-Identifier: GPL-2.0
randstruct-cflags-y += -DRANDSTRUCT
ifdef CONFIG_GCC_PLUGIN_RANDSTRUCT
randstruct-cflags-y \
+= -fplugin=$(objtree)/scripts/gcc-plugins/randomize_layout_plugin.so
randstruct-cflags-$(CONFIG_RANDSTRUCT_PERFORMANCE) \
+= -fplugin-arg-randomize_layout_plugin-performance-mode
else
randstruct-cflags-y \
+= -frandomize-layout-seed-file=$(objtree)/scripts/basic/randstruct.seed
endif
export RANDSTRUCT_CFLAGS := $(randstruct-cflags-y)
KBUILD_CFLAGS += $(RANDSTRUCT_CFLAGS)
+40
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@@ -0,0 +1,40 @@
PHONY := __default
__default:
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
native-objs := $(patsubst %.o,%.thinlto-native.o,$(call read-file, vmlinux.thinlto-index))
__default: $(native-objs)
# Generate .thinlto-native.o (obj) from .o (bitcode) and .thinlto.bc (summary) files
# ---------------------------------------------------------------------------
quiet_cmd_cc_o_bc = CC $(quiet_modtag) $@
be_flags = $(shell sed -n '/saved_c_flags_/s/.*:= //p' \
$(dir $(<)).$(notdir $(<)).cmd)
cmd_cc_o_bc = \
$(CC) $(be_flags) -x ir -fno-lto -Wno-unused-command-line-argument \
-fthinlto-index=$(word 2, $^) -c -o $@ $<
targets += $(native-objs)
$(native-objs): %.thinlto-native.o: %.o %.o.thinlto.bc FORCE
$(call if_changed,cc_o_bc)
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f, $(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+28
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@@ -0,0 +1,28 @@
# SPDX-License-Identifier: GPL-2.0
# Shared with KVM/arm64.
export CFLAGS_UBSAN_TRAP := $(call cc-option,-fsanitize-trap=undefined,-fsanitize-undefined-trap-on-error)
# Enable available and selected UBSAN features.
ubsan-cflags-$(CONFIG_UBSAN_ALIGNMENT) += -fsanitize=alignment
ubsan-cflags-$(CONFIG_UBSAN_BOUNDS_STRICT) += -fsanitize=bounds-strict
ubsan-cflags-$(CONFIG_UBSAN_ARRAY_BOUNDS) += -fsanitize=array-bounds
ubsan-cflags-$(CONFIG_UBSAN_LOCAL_BOUNDS) += -fsanitize=local-bounds
ubsan-cflags-$(CONFIG_UBSAN_SHIFT) += -fsanitize=shift
ubsan-cflags-$(CONFIG_UBSAN_DIV_ZERO) += -fsanitize=integer-divide-by-zero
ubsan-cflags-$(CONFIG_UBSAN_UNREACHABLE) += -fsanitize=unreachable
ubsan-cflags-$(CONFIG_UBSAN_BOOL) += -fsanitize=bool
ubsan-cflags-$(CONFIG_UBSAN_ENUM) += -fsanitize=enum
ubsan-cflags-$(CONFIG_UBSAN_TRAP) += $(CFLAGS_UBSAN_TRAP)
export CFLAGS_UBSAN := $(ubsan-cflags-y)
ubsan-integer-wrap-cflags-$(CONFIG_UBSAN_INTEGER_WRAP) += \
-DINTEGER_WRAP \
-fsanitize-undefined-ignore-overflow-pattern=all \
-fsanitize=signed-integer-overflow \
-fsanitize=unsigned-integer-overflow \
-fsanitize=implicit-signed-integer-truncation \
-fsanitize=implicit-unsigned-integer-truncation \
-fsanitize-ignorelist=$(srctree)/scripts/integer-wrap-ignore.scl
export CFLAGS_UBSAN_INTEGER_WRAP := $(ubsan-integer-wrap-cflags-y)
+45
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@@ -0,0 +1,45 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# Build userspace programs for the target system
#
# Executables compiled from a single .c file
user-csingle := $(foreach m, $(userprogs), $(if $($(m)-objs),,$(m)))
# Executables linked based on several .o files
user-cmulti := $(foreach m, $(userprogs), $(if $($(m)-objs),$(m)))
# Objects compiled from .c files
user-cobjs := $(sort $(foreach m, $(userprogs), $($(m)-objs)))
user-csingle := $(addprefix $(obj)/, $(user-csingle))
user-cmulti := $(addprefix $(obj)/, $(user-cmulti))
user-cobjs := $(addprefix $(obj)/, $(user-cobjs))
user_ccflags = -Wp,-MMD,$(depfile) $(KBUILD_USERCFLAGS) $(userccflags) \
$($(target-stem)-userccflags)
user_ldflags = $(KBUILD_USERLDFLAGS) $(userldflags) $($(target-stem)-userldflags)
user_ldlibs = $(userldlibs) $($(target-stem)-userldlibs)
# Create an executable from a single .c file
quiet_cmd_user_cc_c = CC [U] $@
cmd_user_cc_c = $(CC) $(user_ccflags) $(user_ldflags) -o $@ $< \
$(user_ldlibs)
$(user-csingle): $(obj)/%: $(src)/%.c FORCE
$(call if_changed_dep,user_cc_c)
# Link an executable based on list of .o files
quiet_cmd_user_ld = LD [U] $@
cmd_user_ld = $(CC) $(user_ldflags) -o $@ \
$(addprefix $(obj)/, $($(target-stem)-objs)) $(user_ldlibs)
$(user-cmulti): FORCE
$(call if_changed,user_ld)
$(call multi_depend, $(user-cmulti), , -objs)
# Create .o file from a .c file
quiet_cmd_user_cc_o_c = CC [U] $@
cmd_user_cc_o_c = $(CC) $(user_ccflags) -c -o $@ $<
$(user-cobjs): $(obj)/%.o: $(src)/%.c FORCE
$(call if_changed_dep,user_cc_o_c)
targets += $(user-csingle) $(user-cmulti) $(user-cobjs)
+45
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@@ -0,0 +1,45 @@
# SPDX-License-Identifier: GPL-2.0-only
# ==========================================================================
# Install unstripped copies of vDSO
# ==========================================================================
PHONY := __default
__default:
@:
include $(srctree)/scripts/Kbuild.include
install-dir := $(MODLIB)/vdso
define gen_install_rules
dest := $(install-dir)/$$(patsubst %.dbg,%,$$(notdir $(1)))
__default: $$(dest)
$$(dest): $(1) FORCE
$$(call cmd,install)
build-id-file := $$(shell $(READELF) -n $(1) 2>/dev/null | sed -n 's@^.*Build ID: \(..\)\(.*\)@\1/\2@p')
ifneq ($$(build-id-file),)
link := $(install-dir)/.build-id/$$(build-id-file).debug
__default: $$(link)
$$(link): $$(dest) FORCE
$$(call cmd,symlink)
endif
endef
$(foreach x, $(sort $(INSTALL_FILES)), $(eval $(call gen_install_rules,$(x))))
quiet_cmd_install = INSTALL $@
cmd_install = mkdir -p $(dir $@); cp $< $@
quiet_cmd_symlink = SYMLINK $@
cmd_symlink = mkdir -p $(dir $@); ln -sf --relative $< $@
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)
+175
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@@ -0,0 +1,175 @@
# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
targets :=
%.o: %.c FORCE
$(call if_changed_rule,cc_o_c)
%.o: %.S FORCE
$(call if_changed_rule,as_o_S)
# Built-in dtb
# ---------------------------------------------------------------------------
quiet_cmd_wrap_dtbs = WRAP $@
cmd_wrap_dtbs = { \
echo '\#include <asm-generic/vmlinux.lds.h>'; \
echo '.section .dtb.init.rodata,"a"'; \
while read dtb; do \
symbase=__dtb_$$(basename -s .dtb "$${dtb}" | tr - _); \
echo '.balign STRUCT_ALIGNMENT'; \
echo ".global $${symbase}_begin"; \
echo "$${symbase}_begin:"; \
echo '.incbin "'$$dtb'" '; \
echo ".global $${symbase}_end"; \
echo "$${symbase}_end:"; \
done < $<; \
} > $@
.builtin-dtbs.S: .builtin-dtbs-list FORCE
$(call if_changed,wrap_dtbs)
quiet_cmd_gen_dtbs_list = GEN $@
cmd_gen_dtbs_list = \
$(if $(CONFIG_BUILTIN_DTB_NAME), echo "arch/$(SRCARCH)/boot/dts/$(CONFIG_BUILTIN_DTB_NAME).dtb",:) > $@
.builtin-dtbs-list: arch/$(SRCARCH)/boot/dts/dtbs-list FORCE
$(call if_changed,$(if $(CONFIG_BUILTIN_DTB_ALL),copy,gen_dtbs_list))
targets += .builtin-dtbs-list
ifdef CONFIG_GENERIC_BUILTIN_DTB
targets += .builtin-dtbs.S .builtin-dtbs.o
vmlinux.unstripped: .builtin-dtbs.o
endif
# vmlinux.unstripped
# ---------------------------------------------------------------------------
ifdef CONFIG_ARCH_WANTS_PRE_LINK_VMLINUX
vmlinux.unstripped: arch/$(SRCARCH)/tools/vmlinux.arch.o
arch/$(SRCARCH)/tools/vmlinux.arch.o: vmlinux.o FORCE
$(Q)$(MAKE) $(build)=arch/$(SRCARCH)/tools $@
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.unstripped .vmlinux.export.o
vmlinux.unstripped: scripts/link-vmlinux.sh vmlinux.o .vmlinux.export.o $(KBUILD_LDS) FORCE
+$(call if_changed_dep,link_vmlinux)
ifdef CONFIG_DEBUG_INFO_BTF
vmlinux.unstripped: $(RESOLVE_BTFIDS) $(srctree)/scripts/gen-btf.sh
endif
ifdef CONFIG_BUILDTIME_TABLE_SORT
vmlinux.unstripped: scripts/sorttable
endif
# vmlinux
# ---------------------------------------------------------------------------
remove-section-y := .modinfo
remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel*' '!.rel*.dyn'
# for compatibility with binutils < 2.32
# https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=c12d9fa2afe7abcbe407a00e15719e1a1350c2a7
remove-section-$(CONFIG_ARCH_VMLINUX_NEEDS_RELOCS) += '.rel.*'
remove-symbols := -w --strip-unneeded-symbol='__mod_device_table__*'
# To avoid warnings: "empty loadable segment detected at ..." from GNU objcopy,
# it is necessary to remove the PT_LOAD flag from the segment.
quiet_cmd_strip_relocs = OBJCOPY $@
cmd_strip_relocs = $(OBJCOPY) $(patsubst %,--set-section-flags %=noload,$(remove-section-y)) $< $@; \
$(OBJCOPY) $(addprefix --remove-section=,$(remove-section-y)) $(remove-symbols) $@
targets += vmlinux
vmlinux: vmlinux.unstripped FORCE
$(call if_changed,strip_relocs)
# modules.builtin.modinfo
# ---------------------------------------------------------------------------
# .modinfo in vmlinux.unstripped is aligned to 8 bytes for compatibility with
# tools that expect vmlinux to have sufficiently aligned sections but the
# additional bytes used for padding .modinfo to satisfy this requirement break
# certain versions of kmod with
#
# depmod: ERROR: kmod_builtin_iter_next: unexpected string without modname prefix
#
# Strip the trailing padding bytes after extracting .modinfo to comply with
# what kmod expects to parse.
quiet_cmd_modules_builtin_modinfo = GEN $@
cmd_modules_builtin_modinfo = $(cmd_objcopy); \
sed -i 's/\x00\+$$/\x00/g' $@; \
chmod -x $@
OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary
targets += modules.builtin.modinfo
modules.builtin.modinfo: vmlinux.unstripped FORCE
$(call if_changed,modules_builtin_modinfo)
# modules.builtin
# ---------------------------------------------------------------------------
__default: modules.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/$$/.ko/' > $@
targets += modules.builtin
modules.builtin: modules.builtin.modinfo FORCE
$(call if_changed,modules_builtin)
# modules.builtin.ranges
# ---------------------------------------------------------------------------
ifdef CONFIG_BUILTIN_MODULE_RANGES
__default: modules.builtin.ranges
quiet_cmd_modules_builtin_ranges = GEN $@
cmd_modules_builtin_ranges = gawk -f $(real-prereqs) > $@
targets += modules.builtin.ranges
modules.builtin.ranges: $(srctree)/scripts/generate_builtin_ranges.awk \
modules.builtin vmlinux.map vmlinux.o.map FORCE
$(call if_changed,modules_builtin_ranges)
vmlinux.map: vmlinux.unstripped
@:
endif
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# Read all saved command lines and dependencies for the $(targets) we
# may be building above, using $(if_changed{,_dep}). As an
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+82
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@@ -0,0 +1,82 @@
# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux.a
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
include $(srctree)/scripts/Makefile.lib
# Link of built-in-fixup.a
# ---------------------------------------------------------------------------
quiet_cmd_ar_builtin_fixup = AR $@
cmd_ar_builtin_fixup = \
rm -f $@; \
$(AR) cDPrST $@ $(KBUILD_VMLINUX_OBJS); \
$(AR) mPi $$($(AR) t $@ | sed -n 1p) $@ $$($(AR) t $@ | grep -F -f $(srctree)/scripts/head-object-list.txt)
targets += built-in-fixup.a
built-in-fixup.a: $(KBUILD_VMLINUX_OBJS) scripts/head-object-list.txt FORCE
$(call if_changed,ar_builtin_fixup)
ifdef CONFIG_LTO_CLANG_THIN_DIST
quiet_cmd_builtin.order = GEN $@
cmd_builtin.order = $(AR) t $< > $@
targets += builtin.order
builtin.order: built-in-fixup.a FORCE
$(call if_changed,builtin.order)
quiet_cmd_ld_thinlto_index = LD $@
cmd_ld_thinlto_index = \
$(LD) $(KBUILD_LDFLAGS) -r --thinlto-index-only=$@ @$<
targets += vmlinux.thinlto-index
vmlinux.thinlto-index: builtin.order FORCE
$(call if_changed,ld_thinlto_index)
quiet_cmd_ar_vmlinux.a = GEN $@
cmd_ar_vmlinux.a = \
rm -f $@; \
while read -r obj; do \
if grep -Fqx $${obj} $(word 2, $^); then \
echo $${obj%.o}.thinlto-native.o; \
else \
echo $${obj}; \
fi; \
done < $< | xargs $(AR) cDPrS --thin $@
targets += vmlinux.a
vmlinux.a: builtin.order vmlinux.thinlto-index FORCE
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.thinlto
$(call if_changed,ar_vmlinux.a)
else
# vmlinux.a
# ---------------------------------------------------------------------------
targets += vmlinux.a
vmlinux.a: built-in-fixup.a FORCE
$(call if_changed,copy)
endif
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+95
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@@ -0,0 +1,95 @@
# SPDX-License-Identifier: GPL-2.0-only
PHONY := __default
__default: vmlinux.o
include include/config/auto.conf
include $(srctree)/scripts/Kbuild.include
# for objtool
include $(srctree)/scripts/Makefile.lib
# Generate a linker script to ensure correct ordering of initcalls for Clang LTO
# ---------------------------------------------------------------------------
quiet_cmd_gen_initcalls_lds = GEN $@
cmd_gen_initcalls_lds = \
$(PYTHON3) $(srctree)/scripts/jobserver-exec \
$(PERL) $(real-prereqs) > $@
.tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \
vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed,gen_initcalls_lds)
targets := .tmp_initcalls.lds
ifdef CONFIG_LTO_CLANG
initcalls-lds := .tmp_initcalls.lds
endif
# objtool for vmlinux.o
# ---------------------------------------------------------------------------
#
# For delay-objtool (IBT or LTO), objtool doesn't run on individual translation
# units. Instead it runs on vmlinux.o.
#
# For !delay-objtool + CONFIG_NOINSTR_VALIDATION, it runs on both translation
# units and vmlinux.o, with the latter only used for noinstr/unret validation.
objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION))
ifeq ($(delay-objtool),y)
vmlinux-objtool-args-y += $(objtool-args-y)
else
vmlinux-objtool-args-$(CONFIG_OBJTOOL_WERROR) += --werror
endif
vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr \
$(if $(or $(CONFIG_MITIGATION_UNRET_ENTRY),$(CONFIG_MITIGATION_SRSO)), --unret)
objtool-args = $(vmlinux-objtool-args-y) --link
# Link of vmlinux.o used for section mismatch analysis
# ---------------------------------------------------------------------------
vmlinux-o-ld-args-$(CONFIG_BUILTIN_MODULE_RANGES) += -Map=$@.map
quiet_cmd_ld_vmlinux.o = LD $@
cmd_ld_vmlinux.o = \
$(LD) ${KBUILD_LDFLAGS} -r -o $@ \
$(vmlinux-o-ld-args-y) \
$(addprefix -T , $(initcalls-lds)) \
--whole-archive vmlinux.a --no-whole-archive \
--start-group $(KBUILD_VMLINUX_LIBS) --end-group \
$(cmd_objtool)
cmd_check_function_names = $(srctree)/scripts/check-function-names.sh $@
define rule_ld_vmlinux.o
$(call cmd_and_savecmd,ld_vmlinux.o)
$(call cmd,gen_objtooldep)
$(call cmd,check_function_names)
endef
vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE
$(call if_changed_rule,ld_vmlinux.o)
targets += vmlinux.o
# Add FORCE to the prerequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
PHONY += FORCE
FORCE:
# 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
# exist, we will rebuild anyway in that case.
existing-targets := $(wildcard $(sort $(targets)))
-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
.PHONY: $(PHONY)
+219
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@@ -0,0 +1,219 @@
# SPDX-License-Identifier: GPL-2.0
# ==========================================================================
# make W=... settings
#
# There are four warning groups enabled by W=1, W=2, W=3, and W=e
# They are independent, and can be combined like W=12 or W=123e.
# ==========================================================================
# Default set of warnings, always enabled
KBUILD_CFLAGS += -Wall
KBUILD_CFLAGS += -Wextra
KBUILD_CFLAGS += -Wundef
KBUILD_CFLAGS += -Werror=implicit-function-declaration
KBUILD_CFLAGS += -Werror=implicit-int
KBUILD_CFLAGS += -Werror=return-type
KBUILD_CFLAGS += -Werror=strict-prototypes
KBUILD_CFLAGS += -Wno-format-security
KBUILD_CFLAGS += -Wno-trigraphs
KBUILD_CFLAGS += -Wno-frame-address
KBUILD_CFLAGS += $(call cc-option, -Wno-address-of-packed-member)
KBUILD_CFLAGS += -Wmissing-declarations
KBUILD_CFLAGS += -Wmissing-prototypes
ifneq ($(CONFIG_FRAME_WARN),0)
KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN)
endif
KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds
ifdef CONFIG_CC_IS_CLANG
# Clang checks for overflow/truncation with '%p', while GCC does not:
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111219
KBUILD_CFLAGS += $(call cc-option, -Wno-format-overflow-non-kprintf)
KBUILD_CFLAGS += $(call cc-option, -Wno-format-truncation-non-kprintf)
# Clang may emit a warning when a const variable, such as the dummy variables
# in typecheck(), or const member of an aggregate type are not initialized,
# which can result in unexpected behavior. However, in many audited cases of
# the "field" variant of the warning, this is intentional because the field is
# never used within a particular call path, the field is within a union with
# other non-const members, or the containing object is not const so the field
# can be modified via memcpy() / memset(). While the variable warning also gets
# disabled with this same switch, there should not be too much coverage lost
# because -Wuninitialized will still flag when an uninitialized const variable
# is used.
KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe)
else
# gcc inanely warns about local variables called 'main'
KBUILD_CFLAGS += -Wno-main
endif
# Too noisy on range checks and in macros handling both signed and unsigned.
KBUILD_CFLAGS += -Wno-type-limits
# These result in bogus false positives
KBUILD_CFLAGS += $(call cc-option, -Wno-dangling-pointer)
# Stack Variable Length Arrays (VLAs) must not be used in the kernel.
# Function array parameters should, however, be usable, but -Wvla will
# warn for those. Clang has no way yet to distinguish between the VLA
# types, so depend on GCC for now to keep stack VLAs out of the tree.
# https://github.com/llvm/llvm-project/issues/57098
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98217
KBUILD_CFLAGS += $(call cc-option,-Wvla-larger-than=1)
# disable pointer signed / unsigned warnings in gcc 4.0
KBUILD_CFLAGS += -Wno-pointer-sign
# In order to make sure new function cast mismatches are not introduced
# in the kernel (to avoid tripping CFI checking), the kernel should be
# globally built with -Wcast-function-type.
KBUILD_CFLAGS += -Wcast-function-type
# Currently, disable -Wstringop-overflow for GCC 11, globally.
KBUILD_CFLAGS-$(CONFIG_CC_NO_STRINGOP_OVERFLOW) += $(call cc-option, -Wno-stringop-overflow)
KBUILD_CFLAGS-$(CONFIG_CC_STRINGOP_OVERFLOW) += $(call cc-option, -Wstringop-overflow)
# Currently, disable -Wunterminated-string-initialization as broken
KBUILD_CFLAGS += $(call cc-option, -Wno-unterminated-string-initialization)
# The allocators already balk at large sizes, so silence the compiler
# warnings for bounds checks involving those possible values. While
# -Wno-alloc-size-larger-than would normally be used here, earlier versions
# of gcc (<9.1) weirdly don't handle the option correctly when _other_
# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX
# doesn't work (as it is documented to), silently resolving to "0" prior to
# version 9.1 (and producing an error more recently). Numeric values larger
# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently
# ignored, continuing to default to PTRDIFF_MAX. So, left with no other
# choice, we must perform a versioned check to disable this warning.
# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au
KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than
KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH)
# Prohibit date/time macros, which would make the build non-deterministic
KBUILD_CFLAGS += -Werror=date-time
# enforce correct pointer usage
KBUILD_CFLAGS += -Werror=incompatible-pointer-types
# Require designated initializers for all marked structures
KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init)
# Warn if there is an enum types mismatch
KBUILD_CFLAGS += $(call cc-option,-Wenum-conversion)
KBUILD_CFLAGS += -Wunused
#
# W=1 - warnings which may be relevant and do not occur too often
#
ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),)
KBUILD_CFLAGS += -Wmissing-format-attribute
KBUILD_CFLAGS += -Wmissing-include-dirs
KBUILD_CFLAGS += -Wunused-const-variable
KBUILD_CPPFLAGS += -Wundef
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1
else
# Some diagnostics enabled by default are noisy.
# Suppress them by using -Wno... except for W=1.
KBUILD_CFLAGS += -Wno-unused-but-set-variable
KBUILD_CFLAGS += -Wno-unused-const-variable
KBUILD_CFLAGS += $(call cc-option, -Wno-packed-not-aligned)
KBUILD_CFLAGS += $(call cc-option, -Wno-format-overflow)
ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -Wno-format-truncation
endif
KBUILD_CFLAGS += $(call cc-option, -Wno-stringop-truncation)
KBUILD_CFLAGS += -Wno-override-init # alias for -Wno-initializer-overrides in clang
ifdef CONFIG_CC_IS_CLANG
KBUILD_CFLAGS += -Wno-pointer-to-enum-cast
KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare
KBUILD_CFLAGS += -Wno-unaligned-access
KBUILD_CFLAGS += -Wno-enum-compare-conditional
endif
endif
#
# W=2 - warnings which occur quite often but may still be relevant
#
ifneq ($(findstring 2, $(KBUILD_EXTRA_WARN)),)
KBUILD_CFLAGS += -Wdisabled-optimization
KBUILD_CFLAGS += -Wshadow
KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
KBUILD_CFLAGS += -Wunused-macros
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2
else
# The following turn off the warnings enabled by -Wextra
KBUILD_CFLAGS += -Wno-missing-field-initializers
KBUILD_CFLAGS += -Wno-shift-negative-value
ifdef CONFIG_CC_IS_CLANG
KBUILD_CFLAGS += -Wno-enum-enum-conversion
endif
ifdef CONFIG_CC_IS_GCC
KBUILD_CFLAGS += -Wno-maybe-uninitialized
endif
endif
#
# W=3 - more obscure warnings, can most likely be ignored
#
ifneq ($(findstring 3, $(KBUILD_EXTRA_WARN)),)
KBUILD_CFLAGS += -Wbad-function-cast
KBUILD_CFLAGS += -Wcast-align
KBUILD_CFLAGS += -Wcast-qual
KBUILD_CFLAGS += -Wconversion
KBUILD_CFLAGS += -Wpacked
KBUILD_CFLAGS += -Wpadded
KBUILD_CFLAGS += -Wpointer-arith
KBUILD_CFLAGS += -Wredundant-decls
KBUILD_CFLAGS += -Wsign-compare
KBUILD_CFLAGS += -Wswitch-default
KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3
else
# The following turn off the warnings enabled by -Wextra
KBUILD_CFLAGS += -Wno-sign-compare
KBUILD_CFLAGS += -Wno-unused-parameter
endif
#
# W=e and CONFIG_WERROR - error out on warnings
#
ifneq ($(findstring e, $(KBUILD_EXTRA_WARN))$(CONFIG_WERROR),)
KBUILD_CPPFLAGS += -Werror
KBUILD_AFLAGS += -Wa,--fatal-warnings
KBUILD_LDFLAGS += --fatal-warnings
KBUILD_USERCFLAGS += -Werror
KBUILD_USERLDFLAGS += -Wl,--fatal-warnings
KBUILD_RUSTFLAGS += -Dwarnings
# While hostprog flags are used during build bootstrapping (thus should not
# depend on CONFIG_ symbols), -Werror is disruptive and should be opted into.
# Only apply -Werror to hostprogs built after the initial Kconfig stage.
KBUILD_HOSTCFLAGS += -Werror
KBUILD_HOSTLDFLAGS += -Wl,--fatal-warnings
KBUILD_HOSTRUSTFLAGS += -Dwarnings
endif
+82
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@@ -0,0 +1,82 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
#
# Print the assembler name and its version in a 5 or 6-digit form.
# Also, perform the minimum version check.
# (If it is the integrated assembler, return 0 as the version, and
# skip the version check.)
set -e
# Convert the version string x.y.z to a canonical 5 or 6-digit form.
get_canonical_version()
{
IFS=.
set -- $1
# If the 2nd or 3rd field is missing, fill it with a zero.
#
# The 4th field, if present, is ignored.
# This occurs in development snapshots as in 2.35.1.20201116
echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
}
# Clang fails to handle -Wa,--version unless -fno-integrated-as is given.
# We check -fintegrated-as, expecting it is explicitly passed in for the
# integrated assembler case.
check_integrated_as()
{
while [ $# -gt 0 ]; do
if [ "$1" = -fintegrated-as ]; then
# For the integrated assembler, we do not check the
# version here. It is the same as the clang version, and
# it has been already checked by scripts/cc-version.sh.
echo LLVM 0
exit 0
fi
shift
done
}
check_integrated_as "$@"
orig_args="$@"
# Get the first line of the --version output.
IFS='
'
set -- $(LC_ALL=C "$@" -Wa,--version -c -x assembler-with-cpp /dev/null -o /dev/null 2>/dev/null)
# Split the line on spaces.
IFS=' '
set -- $1
min_tool_version=$(dirname $0)/min-tool-version.sh
if [ "$1" = GNU -a "$2" = assembler ]; then
shift $(($# - 1))
version=$1
min_version=$($min_tool_version binutils)
name=GNU
else
echo "$orig_args: unknown assembler invoked" >&2
exit 1
fi
# Some distributions append a package release number, as in 2.34-4.fc32
# Trim the hyphen and any characters that follow.
version=${version%-*}
cversion=$(get_canonical_version $version)
min_cversion=$(get_canonical_version $min_version)
if [ "$cversion" -lt "$min_cversion" ]; then
echo >&2 "***"
echo >&2 "*** Assembler is too old."
echo >&2 "*** Your $name assembler version: $version"
echo >&2 "*** Minimum $name assembler version: $min_version"
echo >&2 "***"
exit 1
fi
echo $name $cversion
File diff suppressed because it is too large Load Diff
+290
View File
@@ -0,0 +1,290 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# helpers for dealing with atomics.tbl
#meta_in(meta, match)
meta_in()
{
case "$1" in
[$2]) return 0;;
esac
return 1
}
#meta_has_ret(meta)
meta_has_ret()
{
meta_in "$1" "bBiIfFlR"
}
#meta_has_acquire(meta)
meta_has_acquire()
{
meta_in "$1" "BFIlR"
}
#meta_has_release(meta)
meta_has_release()
{
meta_in "$1" "BFIRs"
}
#meta_has_relaxed(meta)
meta_has_relaxed()
{
meta_in "$1" "BFIR"
}
#meta_is_implicitly_relaxed(meta)
meta_is_implicitly_relaxed()
{
meta_in "$1" "vls"
}
#find_template(tmpltype, pfx, name, sfx, order)
find_template()
{
local tmpltype="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local base=""
local file=""
# We may have fallbacks for a specific case (e.g. read_acquire()), or
# an entire class, e.g. *inc*().
#
# Start at the most specific, and fall back to the most general. Once
# we find a specific fallback, don't bother looking for more.
for base in "${pfx}${name}${sfx}${order}" "${pfx}${name}${sfx}" "${name}"; do
file="${ATOMICDIR}/${tmpltype}/${base}"
if [ -f "${file}" ]; then
printf "${file}"
break
fi
done
}
#find_fallback_template(pfx, name, sfx, order)
find_fallback_template()
{
find_template "fallbacks" "$@"
}
#find_kerneldoc_template(pfx, name, sfx, order)
find_kerneldoc_template()
{
find_template "kerneldoc" "$@"
}
#gen_ret_type(meta, int)
gen_ret_type() {
local meta="$1"; shift
local int="$1"; shift
case "${meta}" in
[sv]) printf "void";;
[bB]) printf "bool";;
[aiIfFlR]) printf "${int}";;
esac
}
#gen_ret_stmt(meta)
gen_ret_stmt()
{
if meta_has_ret "${meta}"; then
printf "return ";
fi
}
# gen_param_name(arg)
gen_param_name()
{
# strip off the leading 'c' for 'cv'
local name="${1#c}"
printf "${name#*:}"
}
# gen_param_type(arg, int, atomic)
gen_param_type()
{
local type="${1%%:*}"; shift
local int="$1"; shift
local atomic="$1"; shift
case "${type}" in
i) type="${int} ";;
p) type="${int} *";;
v) type="${atomic}_t *";;
cv) type="const ${atomic}_t *";;
esac
printf "${type}"
}
#gen_param(arg, int, atomic)
gen_param()
{
local arg="$1"; shift
local int="$1"; shift
local atomic="$1"; shift
local name="$(gen_param_name "${arg}")"
local type="$(gen_param_type "${arg}" "${int}" "${atomic}")"
printf "${type}${name}"
}
#gen_params(int, atomic, arg...)
gen_params()
{
local int="$1"; shift
local atomic="$1"; shift
while [ "$#" -gt 0 ]; do
gen_param "$1" "${int}" "${atomic}"
[ "$#" -gt 1 ] && printf ", "
shift;
done
}
#gen_args(arg...)
gen_args()
{
while [ "$#" -gt 0 ]; do
printf "$(gen_param_name "$1")"
[ "$#" -gt 1 ] && printf ", "
shift;
done
}
#gen_desc_return(meta)
gen_desc_return()
{
local meta="$1"; shift
case "${meta}" in
[v])
printf "Return: Nothing."
;;
[Ff])
printf "Return: The original value of @v."
;;
[R])
printf "Return: The updated value of @v."
;;
[l])
printf "Return: The value of @v."
;;
esac
}
#gen_template_kerneldoc(template, class, meta, pfx, name, sfx, order, atomic, int, args...)
gen_template_kerneldoc()
{
local template="$1"; shift
local class="$1"; shift
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomic="$1"; shift
local int="$1"; shift
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
local ret="$(gen_ret_type "${meta}" "${int}")"
local retstmt="$(gen_ret_stmt "${meta}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local args="$(gen_args "$@")"
local desc_order=""
local desc_instrumentation=""
local desc_return=""
if [ ! -z "${order}" ]; then
desc_order="${order##_}"
elif meta_is_implicitly_relaxed "${meta}"; then
desc_order="relaxed"
else
desc_order="full"
fi
if [ -z "${class}" ]; then
desc_noinstr="Unsafe to use in noinstr code; use raw_${atomicname}() there."
else
desc_noinstr="Safe to use in noinstr code; prefer ${atomicname}() elsewhere."
fi
desc_return="$(gen_desc_return "${meta}")"
. ${template}
}
#gen_kerneldoc(class, meta, pfx, name, sfx, order, atomic, int, args...)
gen_kerneldoc()
{
local class="$1"; shift
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
local tmpl="$(find_kerneldoc_template "${pfx}" "${name}" "${sfx}" "${order}")"
if [ -z "${tmpl}" ]; then
printf "/*\n"
printf " * No kerneldoc available for ${class}${atomicname}\n"
printf " */\n"
else
gen_template_kerneldoc "${tmpl}" "${class}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
fi
}
#gen_proto_order_variants(meta, pfx, name, sfx, ...)
gen_proto_order_variants()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
if meta_has_acquire "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
fi
if meta_has_release "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
fi
if meta_has_relaxed "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
fi
}
#gen_proto_variants(meta, name, ...)
gen_proto_variants()
{
local meta="$1"; shift
local name="$1"; shift
local pfx=""
local sfx=""
meta_in "${meta}" "fF" && pfx="fetch_"
meta_in "${meta}" "R" && sfx="_return"
gen_proto_order_variants "${meta}" "${pfx}" "${name}" "${sfx}" "$@"
}
#gen_proto(meta, ...)
gen_proto() {
local meta="$1"; shift
for m in $(echo "${meta}" | grep -o .); do
gen_proto_variants "${m}" "$@"
done
}
+41
View File
@@ -0,0 +1,41 @@
# name meta args...
#
# Where meta contains a string of variants to generate.
# Upper-case implies _{acquire,release,relaxed} variants.
# Valid meta values are:
# * B/b - bool: returns bool
# * v - void: returns void
# * I/i - int: returns base type
# * R - return: returns base type (has _return variants)
# * F/f - fetch: returns base type (has fetch_ variants)
# * l - load: returns base type (has _acquire order variant)
# * s - store: returns void (has _release order variant)
#
# Where args contains list of type[:name], where type is:
# * cv - const pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t)
# * v - pointer to atomic base type (atomic_t/atomic64_t/atomic_long_t)
# * i - base type (int/s64/long)
# * p - pointer to base type (int/s64/long)
#
read l cv
set s v i
add vRF i v
sub vRF i v
inc vRF v
dec vRF v
and vF i v
andnot vF i v
or vF i v
xor vF i v
xchg I v i:new
cmpxchg I v i:old i:new
try_cmpxchg B v p:old i:new
sub_and_test b i v
dec_and_test b v
inc_and_test b v
add_negative B i v
add_unless fb v i:a i:u
inc_not_zero b v
inc_unless_negative b v
dec_unless_positive b v
dec_if_positive i v
+5
View File
@@ -0,0 +1,5 @@
cat <<EOF
${ret} ret = arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
__atomic_acquire_fence();
return ret;
EOF
+3
View File
@@ -0,0 +1,3 @@
cat <<EOF
return raw_${atomic}_add_return${order}(i, v) < 0;
EOF
+3
View File
@@ -0,0 +1,3 @@
cat << EOF
return raw_${atomic}_fetch_add_unless(v, a, u) != u;
EOF
+3
View File
@@ -0,0 +1,3 @@
cat <<EOF
${retstmt}raw_${atomic}_${pfx}and${sfx}${order}(~i, v);
EOF
@@ -0,0 +1,3 @@
cat <<EOF
return raw_cmpxchg${order}(&v->counter, old, new);
EOF
+3
View File
@@ -0,0 +1,3 @@
cat <<EOF
${retstmt}raw_${atomic}_${pfx}sub${sfx}${order}(1, v);
EOF
+3
View File
@@ -0,0 +1,3 @@
cat <<EOF
return raw_${atomic}_dec_return(v) == 0;
EOF
+11
View File
@@ -0,0 +1,11 @@
cat <<EOF
${int} dec, c = raw_${atomic}_read(v);
do {
dec = c - 1;
if (unlikely(dec < 0))
break;
} while (!raw_${atomic}_try_cmpxchg(v, &c, dec));
return dec;
EOF
+10
View File
@@ -0,0 +1,10 @@
cat <<EOF
${int} c = raw_${atomic}_read(v);
do {
if (unlikely(c > 0))
return false;
} while (!raw_${atomic}_try_cmpxchg(v, &c, c - 1));
return true;
EOF
+7
View File
@@ -0,0 +1,7 @@
cat <<EOF
${ret} ret;
__atomic_pre_full_fence();
ret = arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
__atomic_post_full_fence();
return ret;
EOF
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@@ -0,0 +1,10 @@
cat << EOF
${int} c = raw_${atomic}_read(v);
do {
if (unlikely(c == u))
break;
} while (!raw_${atomic}_try_cmpxchg(v, &c, c + a));
return c;
EOF
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@@ -0,0 +1,3 @@
cat <<EOF
${retstmt}raw_${atomic}_${pfx}add${sfx}${order}(1, v);
EOF
+3
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@@ -0,0 +1,3 @@
cat <<EOF
return raw_${atomic}_inc_return(v) == 0;
EOF
+3
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@@ -0,0 +1,3 @@
cat <<EOF
return raw_${atomic}_add_unless(v, 1, 0);
EOF
+10
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@@ -0,0 +1,10 @@
cat <<EOF
${int} c = raw_${atomic}_read(v);
do {
if (unlikely(c < 0))
return false;
} while (!raw_${atomic}_try_cmpxchg(v, &c, c + 1));
return true;
EOF
+12
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@@ -0,0 +1,12 @@
cat <<EOF
${int} ret;
if (__native_word(${atomic}_t)) {
ret = smp_load_acquire(&(v)->counter);
} else {
ret = raw_${atomic}_read(v);
__atomic_acquire_fence();
}
return ret;
EOF
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@@ -0,0 +1,4 @@
cat <<EOF
__atomic_release_fence();
${retstmt}arch_${atomic}_${pfx}${name}${sfx}_relaxed(${args});
EOF
+8
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@@ -0,0 +1,8 @@
cat <<EOF
if (__native_word(${atomic}_t)) {
smp_store_release(&(v)->counter, i);
} else {
__atomic_release_fence();
raw_${atomic}_set(v, i);
}
EOF
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@@ -0,0 +1,3 @@
cat <<EOF
return raw_${atomic}_sub_return(i, v) == 0;
EOF
+7
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@@ -0,0 +1,7 @@
cat <<EOF
${int} r, o = *old;
r = raw_${atomic}_cmpxchg${order}(v, o, new);
if (unlikely(r != o))
*old = r;
return likely(r == o);
EOF
@@ -0,0 +1,3 @@
cat <<EOF
return raw_xchg${order}(&v->counter, new);
EOF
+336
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@@ -0,0 +1,336 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
ATOMICDIR=$(dirname $0)
. ${ATOMICDIR}/atomic-tbl.sh
#gen_template_fallback(template, meta, pfx, name, sfx, order, atomic, int, args...)
gen_template_fallback()
{
local template="$1"; shift
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomic="$1"; shift
local int="$1"; shift
local ret="$(gen_ret_type "${meta}" "${int}")"
local retstmt="$(gen_ret_stmt "${meta}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local args="$(gen_args "$@")"
. ${template}
}
#gen_order_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
gen_order_fallback()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local tmpl_order=${order#_}
local tmpl="${ATOMICDIR}/fallbacks/${tmpl_order:-fence}"
gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
}
#gen_proto_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
gen_proto_fallback()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
}
#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, args...)
gen_proto_order_variant()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomic="$1"; shift
local int="$1"; shift
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
local basename="${atomic}_${pfx}${name}${sfx}"
local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
local ret="$(gen_ret_type "${meta}" "${int}")"
local retstmt="$(gen_ret_stmt "${meta}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local args="$(gen_args "$@")"
gen_kerneldoc "raw_" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
printf "static __always_inline ${ret}\n"
printf "raw_${atomicname}(${params})\n"
printf "{\n"
# Where there is no possible fallback, this order variant is mandatory
# and must be provided by arch code. Add a comment to the header to
# make this obvious.
#
# Ideally we'd error on a missing definition, but arch code might
# define this order variant as a C function without a preprocessor
# symbol.
if [ -z ${template} ] && [ -z "${order}" ] && ! meta_has_relaxed "${meta}"; then
printf "\t${retstmt}arch_${atomicname}(${args});\n"
printf "}\n\n"
return
fi
printf "#if defined(arch_${atomicname})\n"
printf "\t${retstmt}arch_${atomicname}(${args});\n"
# Allow FULL/ACQUIRE/RELEASE ops to be defined in terms of RELAXED ops
if [ "${order}" != "_relaxed" ] && meta_has_relaxed "${meta}"; then
printf "#elif defined(arch_${basename}_relaxed)\n"
gen_order_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
fi
# Allow ACQUIRE/RELEASE/RELAXED ops to be defined in terms of FULL ops
if [ ! -z "${order}" ] && ! meta_is_implicitly_relaxed "${meta}"; then
printf "#elif defined(arch_${basename})\n"
printf "\t${retstmt}arch_${basename}(${args});\n"
fi
printf "#else\n"
if [ ! -z "${template}" ]; then
gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
else
printf "#error \"Unable to define raw_${atomicname}\"\n"
fi
printf "#endif\n"
printf "}\n\n"
}
#gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...)
gen_proto_order_variants()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local atomic="$1"
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
if meta_has_acquire "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
fi
if meta_has_release "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
fi
if meta_has_relaxed "${meta}"; then
gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
fi
}
#gen_basic_fallbacks(basename)
gen_basic_fallbacks()
{
local basename="$1"; shift
cat << EOF
#define raw_${basename}_acquire arch_${basename}
#define raw_${basename}_release arch_${basename}
#define raw_${basename}_relaxed arch_${basename}
EOF
}
gen_order_fallbacks()
{
local xchg="$1"; shift
cat <<EOF
#define raw_${xchg}_relaxed arch_${xchg}_relaxed
#ifdef arch_${xchg}_acquire
#define raw_${xchg}_acquire arch_${xchg}_acquire
#else
#define raw_${xchg}_acquire(...) \\
__atomic_op_acquire(arch_${xchg}, __VA_ARGS__)
#endif
#ifdef arch_${xchg}_release
#define raw_${xchg}_release arch_${xchg}_release
#else
#define raw_${xchg}_release(...) \\
__atomic_op_release(arch_${xchg}, __VA_ARGS__)
#endif
#ifdef arch_${xchg}
#define raw_${xchg} arch_${xchg}
#else
#define raw_${xchg}(...) \\
__atomic_op_fence(arch_${xchg}, __VA_ARGS__)
#endif
EOF
}
gen_xchg_order_fallback()
{
local xchg="$1"; shift
local order="$1"; shift
local forder="${order:-_fence}"
printf "#if defined(arch_${xchg}${order})\n"
printf "#define raw_${xchg}${order} arch_${xchg}${order}\n"
if [ "${order}" != "_relaxed" ]; then
printf "#elif defined(arch_${xchg}_relaxed)\n"
printf "#define raw_${xchg}${order}(...) \\\\\n"
printf " __atomic_op${forder}(arch_${xchg}, __VA_ARGS__)\n"
fi
if [ ! -z "${order}" ]; then
printf "#elif defined(arch_${xchg})\n"
printf "#define raw_${xchg}${order} arch_${xchg}\n"
fi
printf "#else\n"
printf "extern void raw_${xchg}${order}_not_implemented(void);\n"
printf "#define raw_${xchg}${order}(...) raw_${xchg}${order}_not_implemented()\n"
printf "#endif\n\n"
}
gen_xchg_fallbacks()
{
local xchg="$1"; shift
for order in "" "_acquire" "_release" "_relaxed"; do
gen_xchg_order_fallback "${xchg}" "${order}"
done
}
gen_try_cmpxchg_fallback()
{
local prefix="$1"; shift
local cmpxchg="$1"; shift;
local suffix="$1"; shift;
cat <<EOF
#define raw_${prefix}try_${cmpxchg}${suffix}(_ptr, _oldp, _new) \\
({ \\
typeof(*(_ptr)) *___op = (_oldp), ___o = *___op, ___r; \\
___r = raw_${prefix}${cmpxchg}${suffix}((_ptr), ___o, (_new)); \\
if (unlikely(___r != ___o)) \\
*___op = ___r; \\
likely(___r == ___o); \\
})
EOF
}
gen_try_cmpxchg_order_fallback()
{
local cmpxchg="$1"; shift
local order="$1"; shift
local forder="${order:-_fence}"
printf "#if defined(arch_try_${cmpxchg}${order})\n"
printf "#define raw_try_${cmpxchg}${order} arch_try_${cmpxchg}${order}\n"
if [ "${order}" != "_relaxed" ]; then
printf "#elif defined(arch_try_${cmpxchg}_relaxed)\n"
printf "#define raw_try_${cmpxchg}${order}(...) \\\\\n"
printf " __atomic_op${forder}(arch_try_${cmpxchg}, __VA_ARGS__)\n"
fi
if [ ! -z "${order}" ]; then
printf "#elif defined(arch_try_${cmpxchg})\n"
printf "#define raw_try_${cmpxchg}${order} arch_try_${cmpxchg}\n"
fi
printf "#else\n"
gen_try_cmpxchg_fallback "" "${cmpxchg}" "${order}"
printf "#endif\n\n"
}
gen_try_cmpxchg_order_fallbacks()
{
local cmpxchg="$1"; shift;
for order in "" "_acquire" "_release" "_relaxed"; do
gen_try_cmpxchg_order_fallback "${cmpxchg}" "${order}"
done
}
gen_def_and_try_cmpxchg_fallback()
{
local prefix="$1"; shift
local cmpxchg="$1"; shift
local suffix="$1"; shift
printf "#define raw_${prefix}${cmpxchg}${suffix} arch_${prefix}${cmpxchg}${suffix}\n\n"
printf "#ifdef arch_${prefix}try_${cmpxchg}${suffix}\n"
printf "#define raw_${prefix}try_${cmpxchg}${suffix} arch_${prefix}try_${cmpxchg}${suffix}\n"
printf "#else\n"
gen_try_cmpxchg_fallback "${prefix}" "${cmpxchg}" "${suffix}"
printf "#endif\n\n"
}
cat << EOF
// SPDX-License-Identifier: GPL-2.0
// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY
#ifndef _LINUX_ATOMIC_FALLBACK_H
#define _LINUX_ATOMIC_FALLBACK_H
#include <linux/compiler.h>
EOF
for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128"; do
gen_xchg_fallbacks "${xchg}"
done
for cmpxchg in "cmpxchg" "cmpxchg64" "cmpxchg128"; do
gen_try_cmpxchg_order_fallbacks "${cmpxchg}"
done
for cmpxchg in "cmpxchg" "cmpxchg64" "cmpxchg128"; do
gen_def_and_try_cmpxchg_fallback "" "${cmpxchg}" "_local"
done
for cmpxchg in "cmpxchg"; do
gen_def_and_try_cmpxchg_fallback "sync_" "${cmpxchg}" ""
done
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic" "int" ${args}
done
cat <<EOF
#ifdef CONFIG_GENERIC_ATOMIC64
#include <asm-generic/atomic64.h>
#endif
EOF
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
done
cat <<EOF
#endif /* _LINUX_ATOMIC_FALLBACK_H */
EOF
+184
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@@ -0,0 +1,184 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
ATOMICDIR=$(dirname $0)
. ${ATOMICDIR}/atomic-tbl.sh
#gen_param_check(meta, arg)
gen_param_check()
{
local meta="$1"; shift
local arg="$1"; shift
local type="${arg%%:*}"
local name="$(gen_param_name "${arg}")"
local rw="atomic_write"
case "${type#c}" in
i) return;;
esac
if [ ${type#c} != ${type} ]; then
# We don't write to constant parameters.
rw="atomic_read"
elif [ "${type}" = "p" ] ; then
# The "old" argument in try_cmpxchg() gets accessed non-atomically
rw="read_write"
elif [ "${meta}" != "s" ]; then
# An atomic RMW: if this parameter is not a constant, and this atomic is
# not just a 's'tore, this parameter is both read from and written to.
rw="atomic_read_write"
fi
printf "\tinstrument_${rw}(${name}, sizeof(*${name}));\n"
}
#gen_params_checks(meta, arg...)
gen_params_checks()
{
local meta="$1"; shift
local order="$1"; shift
if [ "${order}" = "_release" ]; then
printf "\tkcsan_release();\n"
elif [ -z "${order}" ] && ! meta_in "$meta" "slv"; then
# RMW with return value is fully ordered
printf "\tkcsan_mb();\n"
fi
while [ "$#" -gt 0 ]; do
gen_param_check "$meta" "$1"
shift;
done
}
#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
gen_proto_order_variant()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomic="$1"; shift
local int="$1"; shift
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
local ret="$(gen_ret_type "${meta}" "${int}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local checks="$(gen_params_checks "${meta}" "${order}" "$@")"
local args="$(gen_args "$@")"
local retstmt="$(gen_ret_stmt "${meta}")"
gen_kerneldoc "" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "${atomic}" "${int}" "$@"
cat <<EOF
static __always_inline ${ret}
${atomicname}(${params})
{
${checks}
${retstmt}raw_${atomicname}(${args});
}
EOF
printf "\n"
}
gen_xchg()
{
local xchg="$1"; shift
local order="$1"; shift
kcsan_barrier=""
if [ "${xchg%_local}" = "${xchg}" ]; then
case "$order" in
_release) kcsan_barrier="kcsan_release()" ;;
"") kcsan_barrier="kcsan_mb()" ;;
esac
fi
if [ "${xchg%${xchg#try_cmpxchg}}" = "try_cmpxchg" ] ; then
cat <<EOF
#define ${xchg}${order}(ptr, oldp, ...) \\
({ \\
typeof(ptr) __ai_ptr = (ptr); \\
typeof(oldp) __ai_oldp = (oldp); \\
EOF
[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
cat <<EOF
instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
instrument_read_write(__ai_oldp, sizeof(*__ai_oldp)); \\
raw_${xchg}${order}(__ai_ptr, __ai_oldp, __VA_ARGS__); \\
})
EOF
else
cat <<EOF
#define ${xchg}${order}(ptr, ...) \\
({ \\
typeof(ptr) __ai_ptr = (ptr); \\
EOF
[ -n "$kcsan_barrier" ] && printf "\t${kcsan_barrier}; \\\\\n"
cat <<EOF
instrument_atomic_read_write(__ai_ptr, sizeof(*__ai_ptr)); \\
raw_${xchg}${order}(__ai_ptr, __VA_ARGS__); \\
})
EOF
fi
}
cat << EOF
// SPDX-License-Identifier: GPL-2.0
// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY
/*
* This file provoides atomic operations with explicit instrumentation (e.g.
* KASAN, KCSAN), which should be used unless it is necessary to avoid
* instrumentation. Where it is necessary to aovid instrumenation, the
* raw_atomic*() operations should be used.
*/
#ifndef _LINUX_ATOMIC_INSTRUMENTED_H
#define _LINUX_ATOMIC_INSTRUMENTED_H
#include <linux/build_bug.h>
#include <linux/compiler.h>
#include <linux/instrumented.h>
EOF
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic" "int" ${args}
done
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
done
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic_long" "long" ${args}
done
for xchg in "xchg" "cmpxchg" "cmpxchg64" "cmpxchg128" "try_cmpxchg" "try_cmpxchg64" "try_cmpxchg128"; do
for order in "" "_acquire" "_release" "_relaxed"; do
gen_xchg "${xchg}" "${order}"
printf "\n"
done
done
for xchg in "cmpxchg_local" "cmpxchg64_local" "cmpxchg128_local" "sync_cmpxchg" \
"try_cmpxchg_local" "try_cmpxchg64_local" "try_cmpxchg128_local" "sync_try_cmpxchg"; do
gen_xchg "${xchg}" ""
printf "\n"
done
cat <<EOF
#endif /* _LINUX_ATOMIC_INSTRUMENTED_H */
EOF
+100
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@@ -0,0 +1,100 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
ATOMICDIR=$(dirname $0)
. ${ATOMICDIR}/atomic-tbl.sh
#gen_cast(arg, int, atomic)
gen_cast()
{
local arg="$1"; shift
local int="$1"; shift
local atomic="$1"; shift
[ "${arg%%:*}" = "p" ] || return
printf "($(gen_param_type "${arg}" "${int}" "${atomic}"))"
}
#gen_args_cast(int, atomic, arg...)
gen_args_cast()
{
local int="$1"; shift
local atomic="$1"; shift
while [ "$#" -gt 0 ]; do
local cast="$(gen_cast "$1" "${int}" "${atomic}")"
local arg="$(gen_param_name "$1")"
printf "${cast}${arg}"
[ "$#" -gt 1 ] && printf ", "
shift;
done
}
#gen_proto_order_variant(meta, pfx, name, sfx, order, arg...)
gen_proto_order_variant()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomicname="${pfx}${name}${sfx}${order}"
local ret="$(gen_ret_type "${meta}" "long")"
local params="$(gen_params "long" "atomic_long" "$@")"
local argscast_32="$(gen_args_cast "int" "atomic" "$@")"
local argscast_64="$(gen_args_cast "s64" "atomic64" "$@")"
local retstmt="$(gen_ret_stmt "${meta}")"
gen_kerneldoc "raw_" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "atomic_long" "long" "$@"
cat <<EOF
static __always_inline ${ret}
raw_atomic_long_${atomicname}(${params})
{
#ifdef CONFIG_64BIT
${retstmt}raw_atomic64_${atomicname}(${argscast_64});
#else
${retstmt}raw_atomic_${atomicname}(${argscast_32});
#endif
}
EOF
}
cat << EOF
// SPDX-License-Identifier: GPL-2.0
// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY
#ifndef _LINUX_ATOMIC_LONG_H
#define _LINUX_ATOMIC_LONG_H
#include <linux/compiler.h>
#include <asm/types.h>
#ifdef CONFIG_64BIT
typedef atomic64_t atomic_long_t;
#define ATOMIC_LONG_INIT(i) ATOMIC64_INIT(i)
#define atomic_long_cond_read_acquire atomic64_cond_read_acquire
#define atomic_long_cond_read_relaxed atomic64_cond_read_relaxed
#else
typedef atomic_t atomic_long_t;
#define ATOMIC_LONG_INIT(i) ATOMIC_INIT(i)
#define atomic_long_cond_read_acquire atomic_cond_read_acquire
#define atomic_long_cond_read_relaxed atomic_cond_read_relaxed
#endif
EOF
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" ${args}
done
cat <<EOF
#endif /* _LINUX_ATOMIC_LONG_H */
EOF
+21
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@@ -0,0 +1,21 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Generate atomic headers
ATOMICDIR=$(dirname $0)
ATOMICTBL=${ATOMICDIR}/atomics.tbl
LINUXDIR=${ATOMICDIR}/../..
cat <<EOF |
gen-atomic-instrumented.sh linux/atomic/atomic-instrumented.h
gen-atomic-long.sh linux/atomic/atomic-long.h
gen-atomic-fallback.sh linux/atomic/atomic-arch-fallback.h
gen-rust-atomic-helpers.sh ../rust/helpers/atomic.c
EOF
while read script header args; do
/bin/sh ${ATOMICDIR}/${script} ${ATOMICTBL} ${args} > ${LINUXDIR}/include/${header}
HASH="$(sha1sum ${LINUXDIR}/include/${header})"
HASH="${HASH%% *}"
printf "// %s\n" "${HASH}" >> ${LINUXDIR}/include/${header}
done
+62
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@@ -0,0 +1,62 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
ATOMICDIR=$(dirname $0)
. ${ATOMICDIR}/atomic-tbl.sh
#gen_proto_order_variant(meta, pfx, name, sfx, order, atomic, int, arg...)
gen_proto_order_variant()
{
local meta="$1"; shift
local pfx="$1"; shift
local name="$1"; shift
local sfx="$1"; shift
local order="$1"; shift
local atomic="$1"; shift
local int="$1"; shift
local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
local ret="$(gen_ret_type "${meta}" "${int}")"
local params="$(gen_params "${int}" "${atomic}" "$@")"
local args="$(gen_args "$@")"
local retstmt="$(gen_ret_stmt "${meta}")"
cat <<EOF
__rust_helper ${ret}
rust_helper_${atomicname}(${params})
{
${retstmt}${atomicname}(${args});
}
EOF
}
cat << EOF
// SPDX-License-Identifier: GPL-2.0
// Generated by $0
// DO NOT MODIFY THIS FILE DIRECTLY
/*
* This file provides helpers for the various atomic functions for Rust.
*/
#ifndef _RUST_ATOMIC_API_H
#define _RUST_ATOMIC_API_H
#include <linux/atomic.h>
EOF
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic" "int" ${args}
done
grep '^[a-z]' "$1" | while read name meta args; do
gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
done
cat <<EOF
#endif /* _RUST_ATOMIC_API_H */
EOF
+13
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@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic add with ${desc_order} ordering
* @i: ${int} value to add
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v + @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic add and test if negative with ${desc_order} ordering
* @i: ${int} value to add
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v + @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: @true if the resulting value of @v is negative, @false otherwise.
*/
EOF
@@ -0,0 +1,19 @@
if [ -z "${pfx}" ]; then
desc_return="Return: @true if @v was updated, @false otherwise."
fi
cat <<EOF
/**
* ${class}${atomicname}() - atomic add unless value with ${desc_order} ordering
* @v: pointer to ${atomic}_t
* @a: ${int} value to add
* @u: ${int} value to compare with
*
* If (@v != @u), atomically updates @v to (@v + @a) with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic bitwise AND with ${desc_order} ordering
* @i: ${int} value
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v & @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic bitwise AND NOT with ${desc_order} ordering
* @i: ${int} value
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v & ~@i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,15 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic compare and exchange with ${desc_order} ordering
* @v: pointer to ${atomic}_t
* @old: ${int} value to compare with
* @new: ${int} value to assign
*
* If (@v == @old), atomically updates @v to @new with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: The original value of @v.
*/
EOF
+12
View File
@@ -0,0 +1,12 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic decrement with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v - 1) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,12 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic decrement and test if zero with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v - 1) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: @true if the resulting value of @v is zero, @false otherwise.
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic decrement if positive with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* If (@v > 0), atomically updates @v to (@v - 1) with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: The old value of (@v - 1), regardless of whether @v was updated.
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic decrement unless positive with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* If (@v <= 0), atomically updates @v to (@v - 1) with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: @true if @v was updated, @false otherwise.
*/
EOF
+12
View File
@@ -0,0 +1,12 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic increment with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v + 1) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,12 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic increment and test if zero with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v + 1) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: @true if the resulting value of @v is zero, @false otherwise.
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic increment unless zero with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* If (@v != 0), atomically updates @v to (@v + 1) with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: @true if @v was updated, @false otherwise.
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic increment unless negative with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* If (@v >= 0), atomically updates @v to (@v + 1) with ${desc_order} ordering.
* Otherwise, @v is not modified and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: @true if @v was updated, @false otherwise.
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic bitwise OR with ${desc_order} ordering
* @i: ${int} value
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v | @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
+12
View File
@@ -0,0 +1,12 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic load with ${desc_order} ordering
* @v: pointer to ${atomic}_t
*
* Atomically loads the value of @v with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: The value loaded from @v.
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic set with ${desc_order} ordering
* @v: pointer to ${atomic}_t
* @i: ${int} value to assign
*
* Atomically sets @v to @i with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: Nothing.
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic subtract with ${desc_order} ordering
* @i: ${int} value to subtract
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v - @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic subtract and test if zero with ${desc_order} ordering
* @i: ${int} value to subtract
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v - @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: @true if the resulting value of @v is zero, @false otherwise.
*/
EOF
@@ -0,0 +1,16 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic compare and exchange with ${desc_order} ordering
* @v: pointer to ${atomic}_t
* @old: pointer to ${int} value to compare with
* @new: ${int} value to assign
*
* If (@v == @old), atomically updates @v to @new with ${desc_order} ordering.
* Otherwise, @v is not modified, @old is updated to the current value of @v,
* and relaxed ordering is provided.
*
* ${desc_noinstr}
*
* Return: @true if the exchange occurred, @false otherwise.
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic exchange with ${desc_order} ordering
* @v: pointer to ${atomic}_t
* @new: ${int} value to assign
*
* Atomically updates @v to @new with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* Return: The original value of @v.
*/
EOF
+13
View File
@@ -0,0 +1,13 @@
cat <<EOF
/**
* ${class}${atomicname}() - atomic bitwise XOR with ${desc_order} ordering
* @i: ${int} value
* @v: pointer to ${atomic}_t
*
* Atomically updates @v to (@v ^ @i) with ${desc_order} ordering.
*
* ${desc_noinstr}
*
* ${desc_return}
*/
EOF
+451
View File
@@ -0,0 +1,451 @@
# SPDX-License-Identifier: GPL-2.0-only
# bash completion for GNU make with kbuild extension -*- shell-script -*-
# Load the default completion script for make. It is typically located at
# /usr/share/bash-completion/completions/make, but we do not rely on it.
__kbuild_load_default_make_completion()
{
local -a dirs=("${BASH_COMPLETION_USER_DIR:-${XDG_DATA_HOME:-$HOME/.local/share}/bash-completion}/completions")
local ifs=$IFS IFS=: dir compfile this_dir
for dir in ${XDG_DATA_DIRS:-/usr/local/share:/usr/share}; do
dirs+=("$dir"/bash-completion/completions)
done
IFS=$ifs
this_dir="$(realpath "$(dirname "${BASH_SOURCE[0]}")")"
for dir in "${dirs[@]}"; do
if [[ ! -d ${dir} || ${dir} = "${this_dir}" ]]; then
continue
fi
for compfile in make make.bash _make; do
compfile=$dir/$compfile
# Avoid trying to source dirs; https://bugzilla.redhat.com/903540
if [[ -f ${compfile} ]] && . "${compfile}" &>/dev/null; then
__kbuild_default_make_completion=$(
# shellcheck disable=SC2046 # word splitting is the point here
set -- $(complete -p make)
while [[ $# -gt 1 && "$1" != -F ]]; do
shift
done
if [[ "$1" = -F ]]; then
echo "$2"
fi
)
return
fi
done
done
}
__kbuild_load_default_make_completion
__kbuild_handle_variable()
{
local var=${1%%=*}
local cur=${cur#"${var}"=}
local srctree=$2
local keywords=()
case $var in
ARCH)
# sub-directories under arch/
keywords+=($(find "${srctree}/arch" -mindepth 1 -maxdepth 1 -type d -printf '%P\n'))
# architectures hard-coded in the top Makefile
keywords+=(i386 x86_64 sparc32 sparc64 parisc64)
;;
CROSS_COMPILE)
# toolchains with a full path
local cross_compile=()
local c c2
_filedir
for c in "${COMPREPLY[@]}"; do
# eval for tilde expansion
# suppress error, as this fails when it contains a space
eval "c2=${c}" 2>/dev/null || continue
if [[ ${c} == *-elfedit && ! -d ${c2} && -x ${c2} ]]; then
cross_compile+=("${c%elfedit}")
fi
done
# toolchains in the PATH environment
while read -r c; do
if [[ ${c} == *-elfedit ]]; then
keywords+=("${c%elfedit}")
fi
done < <(compgen -c)
COMPREPLY=()
_filedir -d
# Add cross_compile directly without passing it to compgen.
# Otherwise, toolchain paths with a tilde do not work.
# e.g.)
# CROSS_COMPILE=~/0day/gcc-14.2.0-nolibc/aarch64-linux/bin/aarch64-linux-
COMPREPLY+=("${cross_compile[@]}")
;;
LLVM)
# LLVM=1 uses the default 'clang' etc.
keywords+=(1)
# suffix for a particular version. LLVM=-18 uses 'clang-18' etc.
while read -r c; do
if [[ ${c} == clang-[0-9]* ]]; then
keywords+=("${c#clang}")
fi
done < <(compgen -c)
# directory path to LLVM toolchains
_filedir -d
;;
KCONFIG_ALLCONFIG)
# KCONFIG_ALLCONFIG=1 selects the default fragment
keywords+=(1)
# or the path to a fragment file
_filedir
;;
C | KBUILD_CHECKSRC)
keywords+=(1 2)
;;
V | KBUILD_VERBOSE)
keywords+=({,1}{,2})
;;
W | KBUILD_EXTRA_WARN)
keywords+=({,1}{,2}{,3}{,c}{,e})
;;
KBUILD_ABS_SRCTREE | KBUILD_MODPOST_NOFINAL | KBUILD_MODPOST_WARN | \
CLIPPY | KBUILD_CLIPPY | KCONFIG_NOSILENTUPDATE | \
KCONFIG_OVERWRITECONFIG | KCONFIG_WARN_UNKNOWN_SYMBOL | \
KCONFIG_WERROR )
keywords+=(1)
;;
INSTALL_MOD_STRIP)
keywords+=(1 --strip-debug --strip-unneeded)
;;
O | KBUILD_OUTPUT | M | KBUILD_EXTMOD | MO | KBUILD_EXTMOD_OUTPUT | *_PATH)
# variables that take a directory.
_filedir -d
return
;;
KBUILD_EXTRA_SYMBOL | KBUILD_KCONFIG | KCONFIG_CONFIG)
# variables that take a file.
_filedir
return
esac
COMPREPLY+=($(compgen -W "${keywords[*]}" -- "${cur}"))
}
# Check the -C, -f options and 'source' symlink. Return the source tree we are
# working in.
__kbuild_get_srctree()
{
local words=("$@")
local cwd makef_dir
# see if a path was specified with -C/--directory
for ((i = 1; i < ${#words[@]}; i++)); do
if [[ ${words[i]} == -@(C|-directory) ]]; then
# eval for tilde expansion.
# suppress error, as this fails when it contains a space
eval "cwd=${words[i + 1]}" 2>/dev/null
break
fi
done
if [[ -z ${cwd} ]]; then
cwd=.
fi
# see if a Makefile was specified with -f/--file/--makefile
for ((i = 1; i < ${#words[@]}; i++)); do
if [[ ${words[i]} == -@(f|-?(make)file) ]]; then
# eval for tilde expansion
# suppress error, as this fails when it contains a space
eval "makef_dir=${words[i + 1]%/*}" 2>/dev/null
break
fi
done
if [ -z "${makef_dir}" ]; then
makef_dir=${cwd}
elif [[ ${makef_dir} != /* ]]; then
makef_dir=${cwd}/${makef_dir}
fi
# If ${makef_dir} is a build directory created by the O= option, there
# is a symbolic link 'source', which points to the kernel source tree.
if [[ -L ${makef_dir}/source ]]; then
makef_dir=$(readlink "${makef_dir}/source")
fi
echo "${makef_dir}"
}
# Get SRCARCH to do a little more clever things
__kbuild_get_srcarch()
{
local words=("$@")
local arch srcarch uname_m
# see if ARCH= is explicitly specified
for ((i = 1; i < ${#words[@]}; i++)); do
if [[ ${words[i]} == ARCH=* ]]; then
arch=${words[i]#ARCH=}
break
fi
done
# If ARCH= is not specified, check the build marchine's architecture
if [[ -z ${arch} ]]; then
uname_m=$(uname -m)
# shellcheck disable=SC2209 # 'sh' is SuperH, not a shell command
case ${uname_m} in
arm64 | aarch64*) arch=arm64 ;;
arm* | sa110) arch=arm ;;
i?86 | x86_64) arch=x86 ;;
loongarch*) arch=loongarch ;;
mips*) arch=mips ;;
ppc*) arch=powerpc ;;
riscv*) arch=riscv ;;
s390x) arch=s390 ;;
sh[234]*) arch=sh ;;
sun4u) arch=sparc64 ;;
*) arch=${uname_m} ;;
esac
fi
case ${arch} in
parisc64) srcarch=parisc ;;
sparc32 | sparc64) srcarch=sparc ;;
i386 | x86_64) srcarch=x86 ;;
*) srcarch=${arch} ;;
esac
echo "$srcarch"
}
# small Makefile to parse obj-* syntax
__kbuild_tmp_makefile()
{
cat <<'EOF'
.PHONY: __default
__default:
$(foreach m,$(obj-y) $(obj-m) $(obj-),$(foreach s, -objs -y -m -,$($(m:%.o=%$s))) $(m))
EOF
echo "include ${1}"
}
_make_for_kbuild ()
{
# shellcheck disable=SC2034 # these are set by _init_completion
local cur prev words cword split
_init_completion -s || return
local srctree
srctree=$(__kbuild_get_srctree "${words[@]}")
# If 'kernel' and 'Documentation' directories are found, we assume this
# is a kernel tree. Otherwise, we fall back to the generic rule provided
# by the bash-completion project.
if [[ ! -d ${srctree}/kernel || ! -d ${srctree}/Documentation ]]; then
if [ -n "${__kbuild_default_make_completion}" ]; then
"${__kbuild_default_make_completion}" "$@"
fi
return
fi
# make options with a parameter (copied from the bash-completion project)
case ${prev} in
--file | --makefile | --old-file | --assume-old | --what-if | --new-file | \
--assume-new | -!(-*)[foW])
_filedir
return
;;
--include-dir | --directory | -!(-*)[ICm])
_filedir -d
return
;;
-!(-*)E)
COMPREPLY=($(compgen -v -- "$cur"))
return
;;
--eval | -!(-*)[DVx])
return
;;
--jobs | -!(-*)j)
COMPREPLY=($(compgen -W "{1..$(($(_ncpus) * 2))}" -- "$cur"))
return
;;
esac
local keywords=()
case ${cur} in
-*)
# make options (copied from the bash-completion project)
local opts
opts="$(_parse_help "$1")"
COMPREPLY=($(compgen -W "${opts:-$(_parse_usage "$1")}" -- "$cur"))
if [[ ${COMPREPLY-} == *= ]]; then
compopt -o nospace
fi
return
;;
*=*)
__kbuild_handle_variable "${cur}" "${srctree}"
return
;;
KBUILD_*)
# There are many variables prefixed with 'KBUILD_'.
# Display them only when 'KBUILD_' is entered.
# shellcheck disable=SC2191 # '=' is appended for variables
keywords+=(
KBUILD_{CHECKSRC,EXTMOD,EXTMOD_OUTPUT,OUTPUT,VERBOSE,EXTRA_WARN,CLIPPY}=
KBUILD_BUILD_{USER,HOST,TIMESTAMP}=
KBUILD_MODPOST_{NOFINAL,WARN}=
KBUILD_{ABS_SRCTREE,EXTRA_SYMBOLS,KCONFIG}=
)
;;
KCONFIG_*)
# There are many variables prefixed with 'KCONFIG_'.
# Display them only when 'KCONFIG_' is entered.
# shellcheck disable=SC2191 # '=' is appended for variables
keywords+=(
KCONFIG_{CONFIG,ALLCONFIG,NOSILENTUPDATE,OVERWRITECONFIG}=
KCONFIG_{SEED,PROBABILITY}=
KCONFIG_WARN_UNKNOWN_SYMBOL=
KCONFIG_WERROR=
)
;;
*)
# By default, hide KBUILD_* and KCONFIG_* variables.
# Instead, display only the prefix parts.
keywords+=(KBUILD_ KCONFIG_)
;;
esac
if [[ ${cur} != /* && ${cur} != *//* ]]; then
local dir srcarch kbuild_file tmp
srcarch=$(__kbuild_get_srcarch "${words[@]}")
# single build
dir=${cur}
while true; do
if [[ ${dir} == */* ]]; then
dir=${dir%/*}
else
dir=.
fi
# Search for 'Kbuild' or 'Makefile' in the parent
# directories (may not be a direct parent)
if [[ -f ${srctree}/${dir}/Kbuild ]]; then
kbuild_file=${srctree}/${dir}/Kbuild
break
fi
if [[ -f ${srctree}/${dir}/Makefile ]]; then
kbuild_file=${srctree}/${dir}/Makefile
break
fi
if [[ ${dir} == . ]]; then
break
fi
done
if [[ -n ${kbuild_file} ]]; then
tmp=($(__kbuild_tmp_makefile "${kbuild_file}" |
SRCARCH=${srcarch} obj=${dir} src=${srctree}/${dir} \
"${1}" -n -f - 2>/dev/null))
# Add $(obj)/ prefix
if [[ ${dir} != . ]]; then
tmp=("${tmp[@]/#/${dir}\/}")
fi
keywords+=("${tmp[@]}")
fi
# *_defconfig and *.config files. These might be grouped into
# subdirectories, e.g., arch/powerpc/configs/*/*_defconfig.
if [[ ${cur} == */* ]]; then
dir=${cur%/*}
else
dir=.
fi
tmp=($(find "${srctree}/arch/${srcarch}/configs/${dir}" \
"${srctree}/kernel/configs/${dir}" \
-mindepth 1 -maxdepth 1 -type d -printf '%P/\n' \
-o -printf '%P\n' 2>/dev/null))
if [[ ${dir} != . ]]; then
tmp=("${tmp[@]/#/${dir}\/}")
fi
keywords+=("${tmp[@]}")
fi
# shellcheck disable=SC2191 # '=' is appended for variables
keywords+=(
#
# variables (append =)
#
ARCH=
CROSS_COMPILE=
LLVM=
C= M= MO= O= V= W=
INSTALL{,_MOD,_HDR,_DTBS}_PATH=
KERNELRELEASE=
#
# targets
#
all help
clean mrproper distclean
clang-{tidy,analyzer} compile_commands.json
coccicheck
dtbs{,_check,_install} dt_binding_{check,schemas}
headers{,_install}
vmlinux install
modules{,_prepare,_install,_sign}
vdso_install
tags TAGS cscope gtags
rust{available,fmt,fmtcheck}
kernel{version,release} image_name
kselftest{,-all,-install,-clean,-merge}
# configuration
{,old,olddef,sync,def,savedef,rand,listnew,helpnew,test,tiny}config
{,build_}{menu,n,g,x}config
local{mod,yes}config
all{no,yes,mod,def}config
{yes2mod,mod2yes,mod2no}config
# docs
{html,textinfo,info,latex,pdf,epub,xml,linkcheck,refcheck,clean}docs
# package
{,bin,src}{rpm,deb}-pkg
{pacman,dir,tar}-pkg
tar{,gz,bz2,xz,zst}-pkg
perf-tar{,gz,bz2,xz,zst}-src-pkg
)
COMPREPLY=($(compgen -W "${keywords[*]}" -- "${cur}"))
# Do not append a space for variables, subdirs, "KBUILD_", "KCONFIG_".
if [[ ${COMPREPLY-} == *[=/] || ${COMPREPLY-} =~ ^(KBUILD|KCONFIG)_$ ]]; then
compopt -o nospace
fi
} && complete -F _make_for_kbuild make
+3
View File
@@ -0,0 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
/fixdep
/randstruct.seed
+21
View File
@@ -0,0 +1,21 @@
# SPDX-License-Identifier: GPL-2.0-only
#
# fixdep: used to generate dependency information during build process
hostprogs-always-y += fixdep
# randstruct: the seed is needed before building the gcc-plugin or
# before running a Clang kernel build.
gen-randstruct-seed := $(srctree)/scripts/gen-randstruct-seed.sh
quiet_cmd_create_randstruct_seed = GENSEED $@
cmd_create_randstruct_seed = \
$(CONFIG_SHELL) $(gen-randstruct-seed) \
$@ $(objtree)/include/generated/randstruct_hash.h
$(obj)/randstruct.seed: $(gen-randstruct-seed) FORCE
$(call if_changed,create_randstruct_seed)
always-$(CONFIG_RANDSTRUCT) += randstruct.seed
# integer-wrap: if the .scl file changes, we need to do a full rebuild.
$(obj)/../../include/generated/integer-wrap.h: $(srctree)/scripts/integer-wrap-ignore.scl FORCE
$(call if_changed,touch)
always-$(CONFIG_UBSAN_INTEGER_WRAP) += ../../include/generated/integer-wrap.h
+440
View File
@@ -0,0 +1,440 @@
/*
* "Optimize" a list of dependencies as spit out by gcc -MD
* for the kernel build
* ===========================================================================
*
* Author Kai Germaschewski
* Copyright 2002 by Kai Germaschewski <kai.germaschewski@gmx.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*
* Introduction:
*
* gcc produces a very nice and correct list of dependencies which
* tells make when to remake a file.
*
* To use this list as-is however has the drawback that virtually
* every file in the kernel includes autoconf.h.
*
* If the user re-runs make *config, autoconf.h will be
* regenerated. make notices that and will rebuild every file which
* includes autoconf.h, i.e. basically all files. This is extremely
* annoying if the user just changed CONFIG_HIS_DRIVER from n to m.
*
* So we play the same trick that "mkdep" played before. We replace
* the dependency on autoconf.h by a dependency on every config
* option which is mentioned in any of the listed prerequisites.
*
* kconfig populates a tree in include/config/ with an empty file
* for each config symbol and when the configuration is updated
* the files representing changed config options are touched
* which then let make pick up the changes and the files that use
* the config symbols are rebuilt.
*
* So if the user changes his CONFIG_HIS_DRIVER option, only the objects
* which depend on "include/config/HIS_DRIVER" will be rebuilt,
* so most likely only his driver ;-)
*
* The idea above dates, by the way, back to Michael E Chastain, AFAIK.
*
* So to get dependencies right, there are two issues:
* o if any of the files the compiler read changed, we need to rebuild
* o if the command line given to the compile the file changed, we
* better rebuild as well.
*
* The former is handled by using the -MD output, the later by saving
* the command line used to compile the old object and comparing it
* to the one we would now use.
*
* Again, also this idea is pretty old and has been discussed on
* kbuild-devel a long time ago. I don't have a sensibly working
* internet connection right now, so I rather don't mention names
* without double checking.
*
* This code here has been based partially based on mkdep.c, which
* says the following about its history:
*
* Copyright abandoned, Michael Chastain, <mailto:mec@shout.net>.
* This is a C version of syncdep.pl by Werner Almesberger.
*
*
* It is invoked as
*
* fixdep <depfile> <target> <cmdline>
*
* and will read the dependency file <depfile>
*
* The transformed dependency snipped is written to stdout.
*
* It first generates a line
*
* savedcmd_<target> = <cmdline>
*
* and then basically copies the .<target>.d file to stdout, in the
* process filtering out the dependency on autoconf.h and adding
* dependencies on include/config/MY_OPTION for every
* CONFIG_MY_OPTION encountered in any of the prerequisites.
*
* We don't even try to really parse the header files, but
* merely grep, i.e. if CONFIG_FOO is mentioned in a comment, it will
* be picked up as well. It's not a problem with respect to
* correctness, since that can only give too many dependencies, thus
* we cannot miss a rebuild. Since people tend to not mention totally
* unrelated CONFIG_ options all over the place, it's not an
* efficiency problem either.
*
* (Note: it'd be easy to port over the complete mkdep state machine,
* but I don't think the added complexity is worth it)
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <xalloc.h>
static void usage(void)
{
fprintf(stderr, "Usage: fixdep <depfile> <target> <cmdline>\n");
exit(1);
}
struct item {
struct item *next;
unsigned int len;
unsigned int hash;
char name[];
};
#define HASHSZ 256
static struct item *config_hashtab[HASHSZ], *file_hashtab[HASHSZ];
static unsigned int strhash(const char *str, unsigned int sz)
{
/* fnv32 hash */
unsigned int i, hash = 2166136261U;
for (i = 0; i < sz; i++)
hash = (hash ^ str[i]) * 0x01000193;
return hash;
}
/*
* Add a new value to the configuration string.
*/
static void add_to_hashtable(const char *name, int len, unsigned int hash,
struct item *hashtab[])
{
struct item *aux;
aux = xmalloc(sizeof(*aux) + len);
memcpy(aux->name, name, len);
aux->len = len;
aux->hash = hash;
aux->next = hashtab[hash % HASHSZ];
hashtab[hash % HASHSZ] = aux;
}
/*
* Lookup a string in the hash table. If found, just return true.
* If not, add it to the hashtable and return false.
*/
static bool in_hashtable(const char *name, int len, struct item *hashtab[])
{
struct item *aux;
unsigned int hash = strhash(name, len);
for (aux = hashtab[hash % HASHSZ]; aux; aux = aux->next) {
if (aux->hash == hash && aux->len == len &&
memcmp(aux->name, name, len) == 0)
return true;
}
add_to_hashtable(name, len, hash, hashtab);
return false;
}
/*
* Record the use of a CONFIG_* word.
*/
static void use_config(const char *m, int slen)
{
if (in_hashtable(m, slen, config_hashtab))
return;
/* Print out a dependency path from a symbol name. */
printf(" $(wildcard include/config/%.*s) \\\n", slen, m);
}
/* test if s ends in sub */
static int str_ends_with(const char *s, int slen, const char *sub)
{
int sublen = strlen(sub);
if (sublen > slen)
return 0;
return !memcmp(s + slen - sublen, sub, sublen);
}
static void parse_config_file(const char *p)
{
const char *q, *r;
const char *start = p;
while ((p = strstr(p, "CONFIG_"))) {
if (p > start && (isalnum(p[-1]) || p[-1] == '_')) {
p += 7;
continue;
}
p += 7;
q = p;
while (isalnum(*q) || *q == '_')
q++;
if (str_ends_with(p, q - p, "_MODULE"))
r = q - 7;
else
r = q;
if (r > p)
use_config(p, r - p);
p = q;
}
}
static void *read_file(const char *filename)
{
struct stat st;
int fd;
char *buf;
fd = open(filename, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "fixdep: error opening file: ");
perror(filename);
exit(2);
}
if (fstat(fd, &st) < 0) {
fprintf(stderr, "fixdep: error fstat'ing file: ");
perror(filename);
exit(2);
}
buf = xmalloc(st.st_size + 1);
if (read(fd, buf, st.st_size) != st.st_size) {
perror("fixdep: read");
exit(2);
}
buf[st.st_size] = '\0';
close(fd);
return buf;
}
/* Ignore certain dependencies */
static int is_ignored_file(const char *s, int len)
{
return str_ends_with(s, len, "include/generated/autoconf.h");
}
/* Do not parse these files */
static int is_no_parse_file(const char *s, int len)
{
/* rustc may list binary files in dep-info */
return str_ends_with(s, len, ".rlib") ||
str_ends_with(s, len, ".rmeta") ||
str_ends_with(s, len, ".so");
}
/*
* Important: The below generated source_foo.o and deps_foo.o variable
* 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 *p, const char *target)
{
bool saw_any_target = false;
bool is_target = true;
bool is_source = false;
bool need_parse;
char *q, saved_c;
while (*p) {
/* handle some special characters first. */
switch (*p) {
case '#':
/*
* skip comments.
* rustc may emit comments to dep-info.
*/
p++;
while (*p != '\0' && *p != '\n') {
/*
* escaped newlines continue the comment across
* multiple lines.
*/
if (*p == '\\')
p++;
p++;
}
continue;
case ' ':
case '\t':
/* skip whitespaces */
p++;
continue;
case '\\':
/*
* backslash/newline combinations continue the
* statement. Skip it just like a whitespace.
*/
if (*(p + 1) == '\n') {
p += 2;
continue;
}
break;
case '\n':
/*
* Makefiles use a line-based syntax, where the newline
* is the end of a statement. After seeing a newline,
* we expect the next token is a target.
*/
p++;
is_target = true;
continue;
case ':':
/*
* assume the first dependency after a colon as the
* source file.
*/
p++;
is_target = false;
is_source = true;
continue;
}
/* find the end of the token */
q = p;
while (*q != ' ' && *q != '\t' && *q != '\n' && *q != '#' && *q != ':') {
if (*q == '\\') {
/*
* backslash/newline combinations work like as
* a whitespace, so this is the end of token.
*/
if (*(q + 1) == '\n')
break;
/* escaped special characters */
if (*(q + 1) == '#' || *(q + 1) == ':') {
memmove(p + 1, p, q - p);
p++;
}
q++;
}
if (*q == '\0')
break;
q++;
}
/* Just discard the target */
if (is_target) {
p = q;
continue;
}
saved_c = *q;
*q = '\0';
need_parse = false;
/*
* Do not list the source file as dependency, so that kbuild is
* not confused if a .c file is rewritten into .S or vice versa.
* Storing it in source_* is needed for modpost to compute
* srcversions.
*/
if (is_source) {
/*
* The DT build rule concatenates multiple dep files.
* When processing them, only process the first source
* name, which will be the original one, and ignore any
* other source names, which will be intermediate
* temporary files.
*
* rustc emits the same dependency list for each
* emission type. It is enough to list the source name
* just once.
*/
if (!saw_any_target) {
saw_any_target = true;
printf("source_%s := %s\n\n", target, p);
printf("deps_%s := \\\n", target);
need_parse = true;
}
} else if (!is_ignored_file(p, q - p) &&
!in_hashtable(p, q - p, file_hashtab)) {
printf(" %s \\\n", p);
need_parse = true;
}
if (need_parse && !is_no_parse_file(p, q - p)) {
void *buf;
buf = read_file(p);
parse_config_file(buf);
free(buf);
}
is_source = false;
*q = saved_c;
p = q;
}
if (!saw_any_target) {
fprintf(stderr, "fixdep: parse error; no targets found\n");
exit(1);
}
printf("\n%s: $(deps_%s)\n\n", target, target);
printf("$(deps_%s):\n", target);
}
int main(int argc, char *argv[])
{
const char *depfile, *target, *cmdline;
void *buf;
if (argc != 4)
usage();
depfile = argv[1];
target = argv[2];
cmdline = argv[3];
printf("savedcmd_%s := %s\n\n", target, cmdline);
buf = read_file(depfile);
parse_dep_file(buf, target);
free(buf);
fflush(stdout);
/*
* In the intended usage, the stdout is redirected to .*.cmd files.
* Call ferror() to catch errors such as "No space left on device".
*/
if (ferror(stdout)) {
fprintf(stderr, "fixdep: not all data was written to the output\n");
exit(1);
}
return 0;
}
+113
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#!/usr/bin/env python3
#
# Copyright 2004 Matt Mackall <mpm@selenic.com>
#
# inspired by perl Bloat-O-Meter (c) 1997 by Andi Kleen
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import sys, os, re, argparse
from signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE, SIG_DFL)
parser = argparse.ArgumentParser(description="Simple script used to compare the symbol sizes of 2 object files")
group = parser.add_mutually_exclusive_group()
group.add_argument('-c', help='categorize output based on symbol type', action='store_true')
group.add_argument('-d', help='Show delta of Data Section', action='store_true')
group.add_argument('-t', help='Show delta of text Section', action='store_true')
parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')
parser.add_argument('file_old', help='First file to compare')
parser.add_argument('file_new', help='Second file to compare')
args = parser.parse_args()
re_NUMBER = re.compile(r'\.[0-9]+')
def getsizes(file, format):
sym = {}
nm = "nm"
if args.prefix:
nm = "{}nm".format(args.prefix)
with os.popen("{} --size-sort {}".format(nm, file)) as f:
for line in f:
if line.startswith("\n") or ":" in line:
continue
size, type, name = line.split()
if type in format:
# strip generated symbols
if name.startswith("__mod_"): continue
if name.startswith("__se_sys"): continue
if name.startswith("__se_compat_sys"): continue
if name.startswith("__addressable_"): continue
if name.startswith("__noinstr_text_start"): continue
if name.startswith("_sdata"): continue
if name == "linux_banner": continue
if name == "vermagic": continue
# statics and some other optimizations adds random .NUMBER
name = re_NUMBER.sub('', name)
sym[name] = sym.get(name, 0) + int(size, 16)
return sym
def calc(oldfile, newfile, format):
old = getsizes(oldfile, format)
new = getsizes(newfile, format)
grow, shrink, add, remove, up, down = 0, 0, 0, 0, 0, 0
delta, common = [], {}
otot, ntot = 0, 0
for a in old:
if a in new:
common[a] = 1
for name in old:
otot += old[name]
if name not in common:
remove += 1
down += old[name]
delta.append((-old[name], name))
for name in new:
ntot += new[name]
if name not in common:
add += 1
up += new[name]
delta.append((new[name], name))
for name in common:
d = new.get(name, 0) - old.get(name, 0)
if d>0: grow, up = grow+1, up+d
if d<0: shrink, down = shrink+1, down-d
delta.append((d, name))
delta.sort(reverse=True)
return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
def print_result(symboltype, symbolformat):
grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
calc(args.file_old, args.file_new, symbolformat)
print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
(add, remove, grow, shrink, up, -down, up-down))
print("%-40s %7s %7s %+7s" % (symboltype, "old", "new", "delta"))
for d, n in delta:
if d: print("%-40s %7s %7s %+7d" % (n, old.get(n,"-"), new.get(n,"-"), d))
if otot:
percent = (ntot - otot) * 100.0 / otot
else:
percent = 0
print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
if args.c:
print_result("Function", "tTwW")
print_result("Data", "dDbBvV")
print_result("RO Data", "rR")
elif args.d:
print_result("Data", "dDbBrRvV")
elif args.t:
print_result("Function", "tTwW")
else:
print_result("Function", "tTdDbBrRvVwW")
+224
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#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0-only
# Copyright 2008, Intel Corporation
#
# This file is part of the Linux kernel
#
# Authors:
# Arjan van de Ven <arjan@linux.intel.com>
#
# This script turns a dmesg output into a SVG graphic that shows which
# functions take how much time. You can view SVG graphics with various
# programs, including Inkscape, The Gimp and Firefox.
#
#
# For this script to work, the kernel needs to be compiled with the
# CONFIG_PRINTK_TIME configuration option enabled, and with
# "initcall_debug" passed on the kernel command line.
#
# usage:
# dmesg | perl scripts/bootgraph.pl > output.svg
#
use strict;
use Getopt::Long;
my $header = 0;
sub help {
my $text = << "EOM";
Usage:
1) dmesg | perl scripts/bootgraph.pl [OPTION] > output.svg
2) perl scripts/bootgraph.pl -h
Options:
-header Insert kernel version and date
EOM
my $std=shift;
if ($std == 1) {
print STDERR $text;
} else {
print $text;
}
exit;
}
GetOptions(
'h|help' =>\&help,
'header' =>\$header
);
my %start;
my %end;
my %type;
my $done = 0;
my $maxtime = 0;
my $firsttime = 99999;
my $count = 0;
my %pids;
my %pidctr;
my $headerstep = 20;
my $xheader = 15;
my $yheader = 25;
my $cyheader = 0;
while (<>) {
my $line = $_;
if ($line =~ /([0-9\.]+)\] calling ([a-zA-Z0-9\_\.]+)\+/) {
my $func = $2;
if ($done == 0) {
$start{$func} = $1;
$type{$func} = 0;
if ($1 < $firsttime) {
$firsttime = $1;
}
}
if ($line =~ /\@ ([0-9]+)/) {
$pids{$func} = $1;
}
$count = $count + 1;
}
if ($line =~ /([0-9\.]+)\] async_waiting @ ([0-9]+)/) {
my $pid = $2;
my $func;
if (!defined($pidctr{$pid})) {
$func = "wait_" . $pid . "_1";
$pidctr{$pid} = 1;
} else {
$pidctr{$pid} = $pidctr{$pid} + 1;
$func = "wait_" . $pid . "_" . $pidctr{$pid};
}
if ($done == 0) {
$start{$func} = $1;
$type{$func} = 1;
if ($1 < $firsttime) {
$firsttime = $1;
}
}
$pids{$func} = $pid;
$count = $count + 1;
}
if ($line =~ /([0-9\.]+)\] initcall ([a-zA-Z0-9\_\.]+)\+.*returned/) {
if ($done == 0) {
$end{$2} = $1;
$maxtime = $1;
}
}
if ($line =~ /([0-9\.]+)\] async_continuing @ ([0-9]+)/) {
my $pid = $2;
my $func = "wait_" . $pid . "_" . $pidctr{$pid};
$end{$func} = $1;
$maxtime = $1;
}
if ($line =~ /Write protecting the/) {
$done = 1;
}
if ($line =~ /Freeing unused kernel memory/) {
$done = 1;
}
}
if ($count == 0) {
print STDERR <<END;
No data found in the dmesg. Make sure that 'printk.time=1' and
'initcall_debug' are passed on the kernel command line.
END
help(1);
exit 1;
}
print "<?xml version=\"1.0\" standalone=\"no\"?> \n";
print "<svg width=\"2000\" height=\"100%\" version=\"1.1\" xmlns=\"http://www.w3.org/2000/svg\">\n";
if ($header) {
my $version = `uname -a`;
my $date = `date`;
print "<text transform=\"translate($xheader,$yheader)\">Kernel version: $version</text>\n";
$cyheader = $yheader+$headerstep;
print "<text transform=\"translate($xheader,$cyheader)\">Date: $date</text>\n";
}
my @styles;
$styles[0] = "fill:rgb(0,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[1] = "fill:rgb(0,255,0);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[2] = "fill:rgb(255,0,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[3] = "fill:rgb(255,255,20);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[4] = "fill:rgb(255,0,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[5] = "fill:rgb(0,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[6] = "fill:rgb(0,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[7] = "fill:rgb(0,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[8] = "fill:rgb(255,0,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[9] = "fill:rgb(255,255,128);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[10] = "fill:rgb(255,128,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
$styles[11] = "fill:rgb(128,255,255);fill-opacity:0.5;stroke-width:1;stroke:rgb(0,0,0)";
my $style_wait = "fill:rgb(128,128,128);fill-opacity:0.5;stroke-width:0;stroke:rgb(0,0,0)";
my $mult = 1950.0 / ($maxtime - $firsttime);
my $threshold2 = ($maxtime - $firsttime) / 120.0;
my $threshold = $threshold2/10;
my $stylecounter = 0;
my %rows;
my $rowscount = 1;
my @initcalls = sort { $start{$a} <=> $start{$b} } keys(%start);
foreach my $key (@initcalls) {
my $duration = $end{$key} - $start{$key};
if ($duration >= $threshold) {
my ($s, $s2, $s3, $e, $w, $y, $y2, $style);
my $pid = $pids{$key};
if (!defined($rows{$pid})) {
$rows{$pid} = $rowscount;
$rowscount = $rowscount + 1;
}
$s = ($start{$key} - $firsttime) * $mult;
$s2 = $s + 6;
$s3 = $s + 1;
$e = ($end{$key} - $firsttime) * $mult;
$w = $e - $s;
$y = $rows{$pid} * 150;
$y2 = $y + 4;
$style = $styles[$stylecounter];
$stylecounter = $stylecounter + 1;
if ($stylecounter > 11) {
$stylecounter = 0;
};
if ($type{$key} == 1) {
$y = $y + 15;
print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"115\" style=\"$style_wait\"/>\n";
} else {
print "<rect x=\"$s\" width=\"$w\" y=\"$y\" height=\"145\" style=\"$style\"/>\n";
if ($duration >= $threshold2) {
print "<text transform=\"translate($s2,$y2) rotate(90)\">$key</text>\n";
} else {
print "<text transform=\"translate($s3,$y2) rotate(90)\" font-size=\"3pt\">$key</text>\n";
}
}
}
}
# print the time line on top
my $time = $firsttime;
my $step = ($maxtime - $firsttime) / 15;
while ($time < $maxtime) {
my $s3 = ($time - $firsttime) * $mult;
my $tm = int($time * 100) / 100.0;
print "<text transform=\"translate($s3,89) rotate(90)\">$tm</text>\n";
$time = $time + $step;
}
print "</svg>\n";
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+10
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@@ -0,0 +1,10 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
prev_ver=$(cat .version 2>/dev/null) &&
ver=$(expr ${prev_ver} + 1 2>/dev/null) ||
ver=1
echo ${ver} > .version
echo ${ver}

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