diff options
Diffstat (limited to '')
| -rw-r--r-- | scripts/Makefile | 51 | ||||
| -rw-r--r-- | scripts/Makefile.asm-generic | 42 | ||||
| -rw-r--r-- | scripts/Makefile.build | 579 | ||||
| -rw-r--r-- | scripts/Makefile.clean | 90 | ||||
| -rw-r--r-- | scripts/Makefile.dtbinst | 40 | ||||
| -rw-r--r-- | scripts/Makefile.extrawarn | 78 | ||||
| -rw-r--r-- | scripts/Makefile.gcc-plugins | 53 | ||||
| -rw-r--r-- | scripts/Makefile.headersinst | 130 | ||||
| -rw-r--r-- | scripts/Makefile.host | 164 | ||||
| -rw-r--r-- | scripts/Makefile.kasan | 47 | ||||
| -rw-r--r-- | scripts/Makefile.kcov | 9 | ||||
| -rw-r--r-- | scripts/Makefile.lib | 422 | ||||
| -rw-r--r-- | scripts/Makefile.modbuiltin | 57 | ||||
| -rw-r--r-- | scripts/Makefile.modinst | 38 | ||||
| -rw-r--r-- | scripts/Makefile.modpost | 152 | ||||
| -rw-r--r-- | scripts/Makefile.modsign | 30 | ||||
| -rw-r--r-- | scripts/Makefile.ubsan | 20 |
17 files changed, 2002 insertions, 0 deletions
diff --git a/scripts/Makefile b/scripts/Makefile new file mode 100644 index 000000000..3ce4981bb --- /dev/null +++ b/scripts/Makefile @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0 +### +# scripts contains sources for various helper programs used throughout +# the kernel for the build process. +# --------------------------------------------------------------------------- +# kallsyms: Find all symbols in vmlinux +# pnmttologo: Convert pnm files to logo files +# conmakehash: Create chartable +# conmakehash: Create arrays for initializing the kernel console tables + +HOST_EXTRACFLAGS += -I$(srctree)/tools/include + +CRYPTO_LIBS = $(shell pkg-config --libs libcrypto 2> /dev/null || echo -lcrypto) +CRYPTO_CFLAGS = $(shell pkg-config --cflags libcrypto 2> /dev/null) + +hostprogs-$(CONFIG_BUILD_BIN2C) += bin2c +hostprogs-$(CONFIG_KALLSYMS) += kallsyms +hostprogs-$(CONFIG_LOGO) += pnmtologo +hostprogs-$(CONFIG_VT) += conmakehash +hostprogs-$(BUILD_C_RECORDMCOUNT) += recordmcount +hostprogs-$(CONFIG_BUILDTIME_EXTABLE_SORT) += sortextable +hostprogs-$(CONFIG_ASN1) += asn1_compiler +hostprogs-$(CONFIG_MODULE_SIG) += sign-file +hostprogs-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += extract-cert +hostprogs-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert + +HOSTCFLAGS_sortextable.o = -I$(srctree)/tools/include +HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include +HOSTCFLAGS_sign-file.o = $(CRYPTO_CFLAGS) +HOSTLDLIBS_sign-file = $(CRYPTO_LIBS) +HOSTCFLAGS_extract-cert.o = $(CRYPTO_CFLAGS) +HOSTLDLIBS_extract-cert = $(CRYPTO_LIBS) + +always := $(hostprogs-y) $(hostprogs-m) + +# The following hostprogs-y programs are only build on demand +hostprogs-y += unifdef + +# These targets are used internally to avoid "is up to date" messages +PHONY += build_unifdef +build_unifdef: $(obj)/unifdef + @: + +subdir-$(CONFIG_MODVERSIONS) += genksyms +subdir-y += mod +subdir-$(CONFIG_SECURITY_SELINUX) += selinux +subdir-$(CONFIG_DTC) += dtc +subdir-$(CONFIG_GDB_SCRIPTS) += gdb + +# Let clean descend into subdirs +subdir- += basic kconfig package gcc-plugins diff --git a/scripts/Makefile.asm-generic b/scripts/Makefile.asm-generic new file mode 100644 index 000000000..32ad8e93f --- /dev/null +++ b/scripts/Makefile.asm-generic @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: GPL-2.0 +# include/asm-generic contains a lot of files that are used +# verbatim by several architectures. +# +# This Makefile reads the file arch/$(SRCARCH)/include/$(src)/Kbuild +# and for each file listed in this file with generic-y creates +# a small wrapper file in $(obj) (arch/$(SRCARCH)/include/generated/$(src)) + +PHONY := all +all: + +kbuild-file := $(srctree)/arch/$(SRCARCH)/include/$(src)/Kbuild +-include $(kbuild-file) + +include scripts/Kbuild.include + +# Create output directory if not already present +_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) + +# Stale wrappers when the corresponding files are removed from generic-y +# need removing. +generated-y := $(generic-y) $(generated-y) +all-files := $(patsubst %, $(obj)/%, $(generated-y)) +old-headers := $(wildcard $(obj)/*.h) +unwanted := $(filter-out $(all-files),$(old-headers)) + +quiet_cmd_wrap = WRAP $@ +cmd_wrap = echo "\#include <asm-generic/$*.h>" >$@ + +quiet_cmd_remove = REMOVE $(unwanted) +cmd_remove = rm -f $(unwanted) + +all: $(patsubst %, $(obj)/%, $(generic-y)) FORCE + $(if $(unwanted),$(call cmd,remove),) + @: + +$(obj)/%.h: + $(call cmd,wrap) + +PHONY += FORCE +.PHONY: $(PHONY) +FORCE: ; diff --git a/scripts/Makefile.build b/scripts/Makefile.build new file mode 100644 index 000000000..64fac0ad3 --- /dev/null +++ b/scripts/Makefile.build @@ -0,0 +1,579 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# Building +# ========================================================================== + +src := $(obj) + +PHONY := __build +__build: + +# 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 := +targets := +subdir-y := +subdir-m := +EXTRA_AFLAGS := +EXTRA_CFLAGS := +EXTRA_CPPFLAGS := +EXTRA_LDFLAGS := +asflags-y := +ccflags-y := +cppflags-y := +ldflags-y := + +subdir-asflags-y := +subdir-ccflags-y := + +# Read auto.conf if it exists, otherwise ignore +-include include/config/auto.conf + +include scripts/Kbuild.include + +# For backward compatibility check that these variables do not change +save-cflags := $(CFLAGS) + +# The filename Kbuild has precedence over Makefile +kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) +kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) +include $(kbuild-file) + +# If the save-* variables changed error out +ifeq ($(KBUILD_NOPEDANTIC),) + ifneq ("$(save-cflags)","$(CFLAGS)") + $(error CFLAGS was changed in "$(kbuild-file)". Fix it to use ccflags-y) + endif +endif + +include scripts/Makefile.lib + +# Do not include host rules unless needed +ifneq ($(hostprogs-y)$(hostprogs-m)$(hostlibs-y)$(hostlibs-m)$(hostcxxlibs-y)$(hostcxxlibs-m),) +include scripts/Makefile.host +endif + +ifndef obj +$(warning kbuild: Makefile.build is included improperly) +endif + +# =========================================================================== + +ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) +lib-target := $(obj)/lib.a +real-obj-y += $(obj)/lib-ksyms.o +endif + +ifneq ($(strip $(real-obj-y) $(need-builtin)),) +builtin-target := $(obj)/built-in.a +endif + +modorder-target := $(obj)/modules.order + +# We keep a list of all modules in $(MODVERDIR) + +__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \ + $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \ + $(subdir-ym) $(always) + @: + +# Linus' kernel sanity checking tool +ifneq ($(KBUILD_CHECKSRC),0) + ifeq ($(KBUILD_CHECKSRC),2) + quiet_cmd_force_checksrc = CHECK $< + cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; + else + quiet_cmd_checksrc = CHECK $< + cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ; + endif +endif + +ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),) + cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ; +endif + +# Do section mismatch analysis for each module/built-in.a +ifdef CONFIG_DEBUG_SECTION_MISMATCH + cmd_secanalysis = ; scripts/mod/modpost $@ +endif + +# Compile C sources (.c) +# --------------------------------------------------------------------------- + +# Default is built-in, unless we know otherwise +modkern_cflags = \ + $(if $(part-of-module), \ + $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \ + $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) +quiet_modtag := $(empty) $(empty) + +$(real-obj-m) : part-of-module := y +$(real-obj-m:.o=.i) : part-of-module := y +$(real-obj-m:.o=.s) : part-of-module := y +$(real-obj-m:.o=.lst): part-of-module := y + +$(real-obj-m) : quiet_modtag := [M] +$(real-obj-m:.o=.i) : quiet_modtag := [M] +$(real-obj-m:.o=.s) : quiet_modtag := [M] +$(real-obj-m:.o=.lst): quiet_modtag := [M] + +$(obj-m) : quiet_modtag := [M] + +quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ +cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< + +$(obj)/%.s: $(src)/%.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: $(src)/%.c FORCE + $(call if_changed_dep,cpp_i_c) + +# These mirror gensymtypes_S and co below, keep them in synch. +cmd_gensymtypes_c = \ + $(CPP) -D__GENKSYMS__ $(c_flags) $< | \ + $(GENKSYMS) $(if $(1), -T $(2)) \ + $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ + $(if $(KBUILD_PRESERVE),-p) \ + -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) + +quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@ +cmd_cc_symtypes_c = \ + set -e; \ + $(call cmd_gensymtypes_c,true,$@) >/dev/null; \ + test -s $@ || rm -f $@ + +$(obj)/%.symtypes : $(src)/%.c FORCE + $(call cmd,cc_symtypes_c) + +# 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 -o $@ $< + +$(obj)/%.ll: $(src)/%.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) + +quiet_cmd_cc_o_c = CC $(quiet_modtag) $@ + +ifndef CONFIG_MODVERSIONS +cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< + +else +# When module versioning is enabled the following steps are executed: +# o compile a .tmp_<file>.o from <file>.c +# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does +# not export symbols, we just rename .tmp_<file>.o to <file>.o and +# are done. +# o otherwise, we calculate symbol versions using the good old +# genksyms on the preprocessed source and postprocess them in a way +# that they are usable as a linker script +# o generate <file>.o from .tmp_<file>.o using the linker to +# replace the unresolved symbols __crc_exported_symbol with +# the actual value of the checksum generated by genksyms + +cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $< + +cmd_modversions_c = \ + if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ + $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ + > $(@D)/.tmp_$(@F:.o=.ver); \ + \ + $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ + -T $(@D)/.tmp_$(@F:.o=.ver); \ + rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ + else \ + mv -f $(@D)/.tmp_$(@F) $@; \ + fi; +endif + +ifdef CONFIG_FTRACE_MCOUNT_RECORD +ifndef CC_USING_RECORD_MCOUNT +# compiler will not generate __mcount_loc use recordmcount or recordmcount.pl +ifdef BUILD_C_RECORDMCOUNT +ifeq ("$(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 = set -e ; 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 $(CC_FLAGS_FTRACE),$(_c_flags))" = \ + "$(CC_FLAGS_FTRACE)" ]; then \ + $(sub_cmd_record_mcount) \ + fi; +endif # CC_USING_RECORD_MCOUNT +endif # CONFIG_FTRACE_MCOUNT_RECORD + +ifdef CONFIG_STACK_VALIDATION +ifneq ($(SKIP_STACK_VALIDATION),1) + +__objtool_obj := $(objtree)/tools/objtool/objtool + +objtool_args = $(if $(CONFIG_UNWINDER_ORC),orc generate,check) + +objtool_args += $(if $(part-of-module), --module,) + +ifndef CONFIG_FRAME_POINTER +objtool_args += --no-fp +endif +ifdef CONFIG_GCOV_KERNEL +objtool_args += --no-unreachable +endif +ifdef CONFIG_RETPOLINE + objtool_args += --retpoline +endif + + +ifdef CONFIG_MODVERSIONS +objtool_o = $(@D)/.tmp_$(@F) +else +objtool_o = $(@) +endif + +# 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory +# 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file +# 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file +cmd_objtool = $(if $(patsubst y%,, \ + $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ + $(__objtool_obj) $(objtool_args) "$(objtool_o)";) +objtool_obj = $(if $(patsubst y%,, \ + $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \ + $(__objtool_obj)) + +endif # SKIP_STACK_VALIDATION +endif # CONFIG_STACK_VALIDATION + +# Rebuild all objects when objtool changes, or is enabled/disabled. +objtool_dep = $(objtool_obj) \ + $(wildcard include/config/orc/unwinder.h \ + include/config/stack/validation.h) + +define rule_cc_o_c + $(call echo-cmd,checksrc) $(cmd_checksrc) \ + $(call cmd_and_fixdep,cc_o_c) \ + $(cmd_checkdoc) \ + $(call echo-cmd,objtool) $(cmd_objtool) \ + $(cmd_modversions_c) \ + $(call echo-cmd,record_mcount) $(cmd_record_mcount) +endef + +define rule_as_o_S + $(call cmd_and_fixdep,as_o_S) \ + $(call echo-cmd,objtool) $(cmd_objtool) \ + $(cmd_modversions_S) +endef + +# List module undefined symbols (or empty line if not enabled) +ifdef CONFIG_TRIM_UNUSED_KSYMS +cmd_undef_syms = $(NM) $@ | sed -n 's/^ *U //p' | xargs echo +else +cmd_undef_syms = echo +endif + +# Built-in and composite module parts +$(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE + $(call cmd,force_checksrc) + $(call if_changed_rule,cc_o_c) + +# Single-part modules are special since we need to mark them in $(MODVERDIR) + +$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE + $(call cmd,force_checksrc) + $(call if_changed_rule,cc_o_c) + @{ echo $(@:.o=.ko); echo $@; \ + $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.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: $(src)/%.c FORCE + $(call if_changed_dep,cc_lst_c) + +# Compile assembler sources (.S) +# --------------------------------------------------------------------------- + +modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) + +$(real-obj-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) +$(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) + +# .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. +# +# These mirror gensymtypes_c and co above, keep them in synch. +cmd_gensymtypes_S = \ + (echo "\#include <linux/kernel.h>" ; \ + echo "\#include <asm/asm-prototypes.h>" ; \ + $(CPP) $(a_flags) $< | \ + grep "\<___EXPORT_SYMBOL\>" | \ + sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ) | \ + $(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \ + $(GENKSYMS) $(if $(1), -T $(2)) \ + $(patsubst y,-R,$(CONFIG_MODULE_REL_CRCS)) \ + $(if $(KBUILD_PRESERVE),-p) \ + -r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null)) + +quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@ +cmd_cc_symtypes_S = \ + set -e; \ + $(call cmd_gensymtypes_S,true,$@) >/dev/null; \ + test -s $@ || rm -f $@ + +$(obj)/%.symtypes : $(src)/%.S FORCE + $(call cmd,cc_symtypes_S) + + +quiet_cmd_cpp_s_S = CPP $(quiet_modtag) $@ +cmd_cpp_s_S = $(CPP) $(a_flags) -o $@ $< + +$(obj)/%.s: $(src)/%.S FORCE + $(call if_changed_dep,cpp_s_S) + +quiet_cmd_as_o_S = AS $(quiet_modtag) $@ + +ifndef CONFIG_MODVERSIONS +cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + +else + +ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h) + +ifeq ($(ASM_PROTOTYPES),) +cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< + +else + +# versioning matches the C process described above, with difference that +# we parse asm-prototypes.h C header to get function definitions. + +cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $< + +cmd_modversions_S = \ + if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \ + $(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ + > $(@D)/.tmp_$(@F:.o=.ver); \ + \ + $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \ + -T $(@D)/.tmp_$(@F:.o=.ver); \ + rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \ + else \ + mv -f $(@D)/.tmp_$(@F) $@; \ + fi; +endif +endif + +$(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE + $(call if_changed_rule,as_o_S) + +targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y) +targets += $(extra-y) $(MAKECMDGOALS) $(always) + +# 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 $@ + cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \ + $(subst .h,.c,$@) $(subst .c,.h,$@) + +$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler + $(call cmd,asn1_compiler) + +# Build the compiled-in targets +# --------------------------------------------------------------------------- + +# To build objects in subdirs, we need to descend into the directories +$(sort $(subdir-obj-y)): $(subdir-ym) ; + +# +# Rule to compile a set of .o files into one .o file +# +ifdef builtin-target + +# built-in.a archives are made with no symbol table or index which +# makes them small and fast, but unable to be used by the linker. +# scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol +# table and index. +quiet_cmd_ar_builtin = AR $@ + cmd_ar_builtin = rm -f $@; \ + $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^) + +$(builtin-target): $(real-obj-y) FORCE + $(call if_changed,ar_builtin) + +targets += $(builtin-target) +endif # builtin-target + +# +# Rule to create modules.order file +# +# Create commands to either record .ko file or cat modules.order from +# a subdirectory +modorder-cmds = \ + $(foreach m, $(modorder), \ + $(if $(filter %/modules.order, $m), \ + cat $m;, echo kernel/$m;)) + +$(modorder-target): $(subdir-ym) FORCE + $(Q)(cat /dev/null; $(modorder-cmds)) > $@ + +# +# Rule to compile a set of .o files into one .a file +# +ifdef lib-target +quiet_cmd_link_l_target = AR $@ + +# lib target archives do get a symbol table and index +cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) + +$(lib-target): $(lib-y) FORCE + $(call if_changed,link_l_target) + +targets += $(lib-target) + +dummy-object = $(obj)/.lib_exports.o +ksyms-lds = $(dot-target).lds + +quiet_cmd_export_list = EXPORTS $@ +cmd_export_list = $(OBJDUMP) -h $< | \ + sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\ + rm -f $(dummy-object);\ + echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\ + $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\ + rm $(dummy-object) $(ksyms-lds) + +$(obj)/lib-ksyms.o: $(lib-target) FORCE + $(call if_changed,export_list) + +targets += $(obj)/lib-ksyms.o + +endif + +# +# Rule to link composite objects +# +# Composite objects are specified in kbuild makefile as follows: +# <composite-object>-objs := <list of .o files> +# or +# <composite-object>-y := <list of .o files> +# or +# <composite-object>-m := <list of .o files> +# The -m syntax only works if <composite object> is a module +link_multi_deps = \ +$(filter $(addprefix $(obj)/, \ +$($(subst $(obj)/,,$(@:.o=-objs))) \ +$($(subst $(obj)/,,$(@:.o=-y))) \ +$($(subst $(obj)/,,$(@:.o=-m)))), $^) + +quiet_cmd_link_multi-m = LD [M] $@ +cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) + +$(multi-used-m): FORCE + $(call if_changed,link_multi-m) + @{ echo $(@:.o=.ko); echo $(link_multi_deps); \ + $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) +$(call multi_depend, $(multi-used-m), .o, -objs -y -m) + +targets += $(multi-used-m) +targets := $(filter-out $(PHONY), $(targets)) + +# Add intermediate targets: +# When building objects with specific suffix patterns, add intermediate +# targets that the final targets are derived from. +intermediate_targets = $(foreach sfx, $(2), \ + $(patsubst %$(strip $(1)),%$(sfx), \ + $(filter %$(strip $(1)), $(targets)))) +# %.asn1.o <- %.asn1.[ch] <- %.asn1 +# %.dtb.o <- %.dtb.S <- %.dtb <- %.dts +# %.lex.o <- %.lex.c <- %.l +# %.tab.o <- %.tab.[ch] <- %.y +targets += $(call intermediate_targets, .asn1.o, .asn1.c .asn1.h) \ + $(call intermediate_targets, .dtb.o, .dtb.S .dtb) \ + $(call intermediate_targets, .lex.o, .lex.c) \ + $(call intermediate_targets, .tab.o, .tab.c .tab.h) + +# Descending +# --------------------------------------------------------------------------- + +PHONY += $(subdir-ym) +$(subdir-ym): + $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1) + +# Add FORCE to the prequisites 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. + +cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + include $(cmd_files) +endif + +ifneq ($(KBUILD_SRC),) +# Create directories for object files if they do not exist +obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets)))) +# If cmd_files exist, their directories apparently exist. Skip mkdir. +exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files)))) +obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs))) +ifneq ($(obj-dirs),) +$(shell mkdir -p $(obj-dirs)) +endif +endif + +# Some files contained in $(targets) are intermediate artifacts. +# We never want them to be removed automatically. +.SECONDARY: $(targets) + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean new file mode 100644 index 000000000..0b80e3207 --- /dev/null +++ b/scripts/Makefile.clean @@ -0,0 +1,90 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# Cleaning up +# ========================================================================== + +src := $(obj) + +PHONY := __clean +__clean: + +include scripts/Kbuild.include + +# The filename Kbuild has precedence over Makefile +kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) +include $(if $(wildcard $(kbuild-dir)/Kbuild), $(kbuild-dir)/Kbuild, $(kbuild-dir)/Makefile) + +# Figure out what we need to build from the various variables +# ========================================================================== + +__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) +subdir-y += $(__subdir-y) +__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) +subdir-m += $(__subdir-m) +__subdir- := $(patsubst %/,%,$(filter %/, $(obj-))) +subdir- += $(__subdir-) + +# Subdirectories we need to descend into + +subdir-ym := $(sort $(subdir-y) $(subdir-m)) +subdir-ymn := $(sort $(subdir-ym) $(subdir-)) + +# Add subdir path + +subdir-ymn := $(addprefix $(obj)/,$(subdir-ymn)) + +# build a list of files to remove, usually relative to the current +# directory + +__clean-files := $(extra-y) $(extra-m) $(extra-) \ + $(always) $(targets) $(clean-files) \ + $(hostprogs-y) $(hostprogs-m) $(hostprogs-) \ + $(hostlibs-y) $(hostlibs-m) $(hostlibs-) \ + $(hostcxxlibs-y) $(hostcxxlibs-m) + +__clean-files := $(filter-out $(no-clean-files), $(__clean-files)) + +# clean-files is given relative to the current directory, unless it +# starts with $(objtree)/ (which means "./", so do not add "./" unless +# you want to delete a file from the toplevel object directory). + +__clean-files := $(wildcard \ + $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(__clean-files))) \ + $(filter $(objtree)/%, $(__clean-files))) + +# same as clean-files + +__clean-dirs := $(wildcard \ + $(addprefix $(obj)/, $(filter-out $(objtree)/%, $(clean-dirs))) \ + $(filter $(objtree)/%, $(clean-dirs))) + +# ========================================================================== + +quiet_cmd_clean = CLEAN $(obj) + cmd_clean = rm -f $(__clean-files) +quiet_cmd_cleandir = CLEAN $(__clean-dirs) + cmd_cleandir = rm -rf $(__clean-dirs) + + +__clean: $(subdir-ymn) +ifneq ($(strip $(__clean-files)),) + +$(call cmd,clean) +endif +ifneq ($(strip $(__clean-dirs)),) + +$(call cmd,cleandir) +endif + @: + + +# =========================================================================== +# Generic stuff +# =========================================================================== + +# Descending +# --------------------------------------------------------------------------- + +PHONY += $(subdir-ymn) +$(subdir-ymn): + $(Q)$(MAKE) $(clean)=$@ + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.dtbinst b/scripts/Makefile.dtbinst new file mode 100644 index 000000000..7301ab5e2 --- /dev/null +++ b/scripts/Makefile.dtbinst @@ -0,0 +1,40 @@ +# 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 +# ========================================================================== + +src := $(obj) + +PHONY := __dtbs_install +__dtbs_install: + +export dtbinst_root ?= $(obj) + +include include/config/auto.conf +include scripts/Kbuild.include +include $(src)/Makefile + +dtbinst-files := $(sort $(dtb-y) $(if $(CONFIG_OF_ALL_DTBS), $(dtb-))) +dtbinst-dirs := $(subdir-y) $(subdir-m) + +# Helper targets for Installing DTBs into the boot directory +quiet_cmd_dtb_install = INSTALL $< + cmd_dtb_install = mkdir -p $(2); cp $< $(2) + +install-dir = $(patsubst $(dtbinst_root)%,$(INSTALL_DTBS_PATH)%,$(obj)) + +$(dtbinst-files): %.dtb: $(obj)/%.dtb + $(call cmd,dtb_install,$(install-dir)) + +$(dtbinst-dirs): + $(Q)$(MAKE) $(dtbinst)=$(obj)/$@ + +PHONY += $(dtbinst-files) $(dtbinst-dirs) +__dtbs_install: $(dtbinst-files) $(dtbinst-dirs) + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn new file mode 100644 index 000000000..65df61413 --- /dev/null +++ b/scripts/Makefile.extrawarn @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# +# make W=... settings +# +# W=1 - warnings that may be relevant and does not occur too often +# W=2 - warnings that occur quite often but may still be relevant +# W=3 - the more obscure warnings, can most likely be ignored +# +# $(call cc-option, -W...) handles gcc -W.. options which +# are not supported by all versions of the compiler +# ========================================================================== + +KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) + +ifeq ("$(origin W)", "command line") + export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) +endif + +ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS +warning- := $(empty) + +warning-1 := -Wextra -Wunused -Wno-unused-parameter +warning-1 += -Wmissing-declarations +warning-1 += -Wmissing-format-attribute +warning-1 += $(call cc-option, -Wmissing-prototypes) +warning-1 += -Wold-style-definition +warning-1 += $(call cc-option, -Wmissing-include-dirs) +warning-1 += $(call cc-option, -Wunused-but-set-variable) +warning-1 += $(call cc-option, -Wunused-const-variable) +warning-1 += $(call cc-option, -Wpacked-not-aligned) +warning-1 += $(call cc-disable-warning, missing-field-initializers) +warning-1 += $(call cc-disable-warning, sign-compare) + +warning-2 := -Waggregate-return +warning-2 += -Wcast-align +warning-2 += -Wdisabled-optimization +warning-2 += -Wnested-externs +warning-2 += -Wshadow +warning-2 += $(call cc-option, -Wlogical-op) +warning-2 += $(call cc-option, -Wmissing-field-initializers) +warning-2 += $(call cc-option, -Wsign-compare) +warning-2 += $(call cc-option, -Wmaybe-uninitialized) +warning-2 += $(call cc-option, -Wunused-macros) + +warning-3 := -Wbad-function-cast +warning-3 += -Wcast-qual +warning-3 += -Wconversion +warning-3 += -Wpacked +warning-3 += -Wpadded +warning-3 += -Wpointer-arith +warning-3 += -Wredundant-decls +warning-3 += -Wswitch-default +warning-3 += $(call cc-option, -Wpacked-bitfield-compat) +warning-3 += $(call cc-option, -Wvla) + +warning := $(warning-$(findstring 1, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) +warning += $(warning-$(findstring 2, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) +warning += $(warning-$(findstring 3, $(KBUILD_ENABLE_EXTRA_GCC_CHECKS))) + +ifeq ("$(strip $(warning))","") + $(error W=$(KBUILD_ENABLE_EXTRA_GCC_CHECKS) is unknown) +endif + +KBUILD_CFLAGS += $(warning) +else + +ifeq ($(cc-name),clang) +KBUILD_CFLAGS += $(call cc-disable-warning, initializer-overrides) +KBUILD_CFLAGS += $(call cc-disable-warning, unused-value) +KBUILD_CFLAGS += $(call cc-disable-warning, format) +KBUILD_CFLAGS += $(call cc-disable-warning, sign-compare) +KBUILD_CFLAGS += $(call cc-disable-warning, format-zero-length) +KBUILD_CFLAGS += $(call cc-disable-warning, uninitialized) +KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) +KBUILD_CFLAGS += $(call cc-disable-warning, unaligned-access) +endif +endif diff --git a/scripts/Makefile.gcc-plugins b/scripts/Makefile.gcc-plugins new file mode 100644 index 000000000..93ca13e4f --- /dev/null +++ b/scripts/Makefile.gcc-plugins @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: GPL-2.0 + +gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so + +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 +endif +export DISABLE_LATENT_ENTROPY_PLUGIN + +gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so + +gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += structleak_plugin.so +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE) \ + += -fplugin-arg-structleak_plugin-verbose +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) \ + += -fplugin-arg-structleak_plugin-byref-all +ifdef CONFIG_GCC_PLUGIN_STRUCTLEAK + DISABLE_STRUCTLEAK_PLUGIN += -fplugin-arg-structleak_plugin-disable +endif +export DISABLE_STRUCTLEAK_PLUGIN +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) \ + += -DSTRUCTLEAK_PLUGIN + +gcc-plugin-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) += randomize_layout_plugin.so +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT) \ + += -DRANDSTRUCT_PLUGIN +gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_RANDSTRUCT_PERFORMANCE) \ + += -fplugin-arg-randomize_layout_plugin-performance-mode + +# 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)) +# The sancov_plugin.so is included via CFLAGS_KCOV, so it is removed here. +GCC_PLUGINS_CFLAGS := $(filter-out %/sancov_plugin.so, $(GCC_PLUGINS_CFLAGS)) +export GCC_PLUGINS_CFLAGS + +# Add the flags to the build! +KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS) + +# All enabled GCC plugins are collected here for building below. +GCC_PLUGIN := $(gcc-plugin-y) +export GCC_PLUGIN + +# Actually do the build, if requested. +PHONY += gcc-plugins +gcc-plugins: scripts_basic +ifdef CONFIG_GCC_PLUGINS + $(Q)$(MAKE) $(build)=scripts/gcc-plugins +endif + @: diff --git a/scripts/Makefile.headersinst b/scripts/Makefile.headersinst new file mode 100644 index 000000000..d5e131471 --- /dev/null +++ b/scripts/Makefile.headersinst @@ -0,0 +1,130 @@ +# 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 scripts/Kbuild.include + +srcdir := $(srctree)/$(obj) + +# When make is run under a fakechroot environment, the function +# $(wildcard $(srcdir)/*/.) doesn't only return directories, but also regular +# files. So, we are using a combination of sort/dir/wildcard which works +# with fakechroot. +subdirs := $(patsubst $(srcdir)/%/,%,\ + $(filter-out $(srcdir)/,\ + $(sort $(dir $(wildcard $(srcdir)/*/))))) + +# Recursion +__headers: $(subdirs) + +PHONY += $(subdirs) +$(subdirs): + $(Q)$(MAKE) $(hdr-inst)=$(obj)/$@ dst=$(dst)/$@ + +# Skip header install/check for include/uapi and arch/$(SRCARCH)/include/uapi. +# We have only sub-directories there. +skip-inst := $(if $(filter %/uapi,$(obj)),1) + +ifeq ($(skip-inst),) + +# Kbuild file is optional +kbuild-file := $(srctree)/$(obj)/Kbuild +-include $(kbuild-file) + +installdir := $(INSTALL_HDR_PATH)/$(dst) +gendir := $(objtree)/$(subst include/,include/generated/,$(obj)) +header-files := $(notdir $(wildcard $(srcdir)/*.h)) +header-files += $(notdir $(wildcard $(srcdir)/*.agh)) +header-files := $(filter-out $(no-export-headers), $(header-files)) +genhdr-files := $(notdir $(wildcard $(gendir)/*.h)) +genhdr-files := $(filter-out $(header-files), $(genhdr-files)) + +# files used to track state of install/check +install-file := $(installdir)/.install +check-file := $(installdir)/.check + +# all headers files for this dir +all-files := $(header-files) $(genhdr-files) +output-files := $(addprefix $(installdir)/, $(all-files)) + +ifneq ($(mandatory-y),) +missing := $(filter-out $(all-files),$(mandatory-y)) +ifneq ($(missing),) +$(error Some mandatory headers ($(missing)) are missing in $(obj)) +endif +endif + +# Work out what needs to be removed +oldheaders := $(patsubst $(installdir)/%,%,$(wildcard $(installdir)/*.h)) +unwanted := $(filter-out $(all-files),$(oldheaders)) + +# Prefix unwanted with full paths to $(INSTALL_HDR_PATH) +unwanted-file := $(addprefix $(installdir)/, $(unwanted)) + +printdir = $(patsubst $(INSTALL_HDR_PATH)/%/,%,$(dir $@)) + +quiet_cmd_install = INSTALL $(printdir) ($(words $(all-files))\ + file$(if $(word 2, $(all-files)),s)) + cmd_install = \ + $(CONFIG_SHELL) $< $(installdir) $(srcdir) $(header-files); \ + $(CONFIG_SHELL) $< $(installdir) $(gendir) $(genhdr-files); \ + touch $@ + +quiet_cmd_remove = REMOVE $(unwanted) + cmd_remove = rm -f $(unwanted-file) + +quiet_cmd_check = CHECK $(printdir) ($(words $(all-files)) files) +# Headers list can be pretty long, xargs helps to avoid +# the "Argument list too long" error. + cmd_check = for f in $(all-files); do \ + echo "$(installdir)/$${f}"; done \ + | xargs \ + $(PERL) $< $(INSTALL_HDR_PATH)/include $(SRCARCH); \ + touch $@ + +ifndef HDRCHECK +# Rules for installing headers +__headers: $(install-file) + @: + +targets += $(install-file) +$(install-file): scripts/headers_install.sh \ + $(addprefix $(srcdir)/,$(header-files)) \ + $(addprefix $(gendir)/,$(genhdr-files)) FORCE + $(if $(unwanted),$(call cmd,remove),) + $(if $(wildcard $(dir $@)),,$(shell mkdir -p $(dir $@))) + $(call if_changed,install) + +else +__headers: $(check-file) + @: + +targets += $(check-file) +$(check-file): scripts/headers_check.pl $(output-files) FORCE + $(call if_changed,check) + +endif + +cmd_files := $(wildcard \ + $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + include $(cmd_files) +endif + +endif # skip-inst + +PHONY += FORCE +FORCE: ; + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.host b/scripts/Makefile.host new file mode 100644 index 000000000..0393f75db --- /dev/null +++ b/scripts/Makefile.host @@ -0,0 +1,164 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# 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. +# +# Sample syntax (see Documentation/kbuild/makefiles.txt for reference) +# hostprogs-y := bin2hex +# Will compile bin2hex.c and create an executable named bin2hex +# +# hostprogs-y := 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-y := 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 := $(sort $(hostprogs-y) $(hostprogs-m)) +host-cshlib := $(sort $(hostlibs-y) $(hostlibs-m)) +host-cxxshlib := $(sort $(hostcxxlibs-y) $(hostcxxlibs-m)) + +# C code +# Executables compiled from a single .c file +host-csingle := $(foreach m,$(__hostprogs), \ + $(if $($(m)-objs)$($(m)-cxxobjs),,$(m))) + +# C executables linked based on several .o files +host-cmulti := $(foreach m,$(__hostprogs),\ + $(if $($(m)-cxxobjs),,$(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))) + +# Object (.o) files used by the shared libaries +host-cshobjs := $(sort $(foreach m,$(host-cshlib),$($(m:.so=-objs)))) +host-cxxshobjs := $(sort $(foreach m,$(host-cxxshlib),$($(m:.so=-objs)))) + +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-cshlib := $(addprefix $(obj)/,$(host-cshlib)) +host-cxxshlib := $(addprefix $(obj)/,$(host-cxxshlib)) +host-cshobjs := $(addprefix $(obj)/,$(host-cshobjs)) +host-cxxshobjs := $(addprefix $(obj)/,$(host-cxxshobjs)) + +##### +# Handle options to gcc. Support building with separate output directory + +_hostc_flags = $(KBUILD_HOSTCFLAGS) $(HOST_EXTRACFLAGS) \ + $(HOSTCFLAGS_$(basetarget).o) +_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \ + $(HOSTCXXFLAGS_$(basetarget).o) + +ifeq ($(KBUILD_SRC),) +__hostc_flags = $(_hostc_flags) +__hostcxx_flags = $(_hostcxx_flags) +else +__hostc_flags = -I$(obj) $(call flags,_hostc_flags) +__hostcxx_flags = -I$(obj) $(call flags,_hostcxx_flags) +endif + +hostc_flags = -Wp,-MD,$(depfile) $(__hostc_flags) +hostcxx_flags = -Wp,-MD,$(depfile) $(__hostcxx_flags) + +##### +# 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_$(@F)) +$(host-csingle): $(obj)/%: $(src)/%.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)/,$($(@F)-objs)) \ + $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) +$(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: $(src)/%.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)/,$($(@F)-$(o)))) \ + $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) +$(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: $(src)/%.cc FORCE + $(call if_changed_dep,host-cxxobjs) + +# Compile .c file, create position independent .o file +# host-cshobjs -> .o +quiet_cmd_host-cshobjs = HOSTCC -fPIC $@ + cmd_host-cshobjs = $(HOSTCC) $(hostc_flags) -fPIC -c -o $@ $< +$(host-cshobjs): $(obj)/%.o: $(src)/%.c FORCE + $(call if_changed_dep,host-cshobjs) + +# Compile .c file, create position independent .o file +# Note that plugin capable gcc versions can be either C or C++ based +# therefore plugin source files have to be compilable in both C and C++ mode. +# This is why a C++ compiler is invoked on a .c file. +# host-cxxshobjs -> .o +quiet_cmd_host-cxxshobjs = HOSTCXX -fPIC $@ + cmd_host-cxxshobjs = $(HOSTCXX) $(hostcxx_flags) -fPIC -c -o $@ $< +$(host-cxxshobjs): $(obj)/%.o: $(src)/%.c FORCE + $(call if_changed_dep,host-cxxshobjs) + +# Link a shared library, based on position independent .o files +# *.o -> .so shared library (host-cshlib) +quiet_cmd_host-cshlib = HOSTLLD -shared $@ + cmd_host-cshlib = $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ + $(addprefix $(obj)/,$($(@F:.so=-objs))) \ + $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) +$(host-cshlib): FORCE + $(call if_changed,host-cshlib) +$(call multi_depend, $(host-cshlib), .so, -objs) + +# Link a shared library, based on position independent .o files +# *.o -> .so shared library (host-cxxshlib) +quiet_cmd_host-cxxshlib = HOSTLLD -shared $@ + cmd_host-cxxshlib = $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -shared -o $@ \ + $(addprefix $(obj)/,$($(@F:.so=-objs))) \ + $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(@F)) +$(host-cxxshlib): FORCE + $(call if_changed,host-cxxshlib) +$(call multi_depend, $(host-cxxshlib), .so, -objs) + +targets += $(host-csingle) $(host-cmulti) $(host-cobjs)\ + $(host-cxxmulti) $(host-cxxobjs) $(host-cshlib) $(host-cshobjs) $(host-cxxshlib) $(host-cxxshobjs) diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan new file mode 100644 index 000000000..69552a399 --- /dev/null +++ b/scripts/Makefile.kasan @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: GPL-2.0 +ifdef CONFIG_KASAN +ifdef CONFIG_KASAN_INLINE + call_threshold := 10000 +else + call_threshold := 0 +endif + +KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET) + +CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address + +cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1))) + +ifeq ($(call cc-option, $(CFLAGS_KASAN_MINIMAL) -Werror),) + ifneq ($(CONFIG_COMPILE_TEST),y) + $(warning Cannot use CONFIG_KASAN: \ + -fsanitize=kernel-address is not supported by compiler) + endif +else + # -fasan-shadow-offset fails without -fsanitize + CFLAGS_KASAN_SHADOW := $(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))) + + ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),) + CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) + else + # Now add all the compiler specific options that are valid standalone + CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \ + $(call cc-param,asan-globals=1) \ + $(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \ + $(call cc-param,asan-stack=1) \ + $(call cc-param,asan-use-after-scope=1) \ + $(call cc-param,asan-instrument-allocas=1) + endif + +endif + +ifdef CONFIG_KASAN_EXTRA +CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) +endif + +CFLAGS_KASAN_NOSANITIZE := -fno-builtin + +endif diff --git a/scripts/Makefile.kcov b/scripts/Makefile.kcov new file mode 100644 index 000000000..3d61c4bfc --- /dev/null +++ b/scripts/Makefile.kcov @@ -0,0 +1,9 @@ +ifdef CONFIG_KCOV + +kcov-flags-$(CONFIG_CC_HAS_SANCOV_TRACE_PC) += -fsanitize-coverage=trace-pc +kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS) += -fsanitize-coverage=trace-cmp +kcov-flags-$(CONFIG_GCC_PLUGIN_SANCOV) += -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so + +export CFLAGS_KCOV := $(kcov-flags-y) + +endif diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib new file mode 100644 index 000000000..a232741e3 --- /dev/null +++ b/scripts/Makefile.lib @@ -0,0 +1,422 @@ +# SPDX-License-Identifier: GPL-2.0 +# Backward compatibility +asflags-y += $(EXTRA_AFLAGS) +ccflags-y += $(EXTRA_CFLAGS) +cppflags-y += $(EXTRA_CPPFLAGS) +ldflags-y += $(EXTRA_LDFLAGS) + +# flags that take effect in current and sub directories +KBUILD_AFLAGS += $(subdir-asflags-y) +KBUILD_CFLAGS += $(subdir-ccflags-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))) + +# Determine modorder. +# Unfortunately, we don't have information about ordering between -y +# and -m subdirs. Just put -y's first. +modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko)) + +# Handle objects in subdirs +# --------------------------------------------------------------------------- +# o if we encounter foo/ in $(obj-y), replace it by foo/built-in.a +# and add the directory to the list of dirs to descend into: $(subdir-y) +# o if we encounter foo/ in $(obj-m), remove it from $(obj-m) +# and add the directory to the list of dirs to descend into: $(subdir-m) +__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y))) +subdir-y += $(__subdir-y) +__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m))) +subdir-m += $(__subdir-m) +obj-y := $(patsubst %/, %/built-in.a, $(obj-y)) +obj-m := $(filter-out %/, $(obj-m)) + +# Subdirectories we need to descend into +subdir-ym := $(sort $(subdir-y) $(subdir-m)) + +# if $(foo-objs), $(foo-y), or $(foo-m) exists, foo.o is a composite object +multi-used-y := $(sort $(foreach m,$(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m)))) +multi-used-m := $(sort $(foreach m,$(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))), $(m)))) +multi-used := $(multi-used-y) $(multi-used-m) +single-used-m := $(sort $(filter-out $(multi-used-m),$(obj-m))) + +# $(subdir-obj-y) is the list of objects in $(obj-y) which uses dir/ to +# tell kbuild to descend +subdir-obj-y := $(filter %/built-in.a, $(obj-y)) + +# Replace multi-part objects by their individual parts, +# including built-in.a from subdirectories +real-obj-y := $(foreach m, $(obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))),$($(m:.o=-objs)) $($(m:.o=-y)),$(m))) +real-obj-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m)),$(m))) + +# DTB +# If CONFIG_OF_ALL_DTBS is enabled, all DT blobs are built +extra-y += $(dtb-y) +extra-$(CONFIG_OF_ALL_DTBS) += $(dtb-) + +# Add subdir path + +extra-y := $(addprefix $(obj)/,$(extra-y)) +always := $(addprefix $(obj)/,$(always)) +targets := $(addprefix $(obj)/,$(targets)) +modorder := $(addprefix $(obj)/,$(modorder)) +obj-m := $(addprefix $(obj)/,$(obj-m)) +lib-y := $(addprefix $(obj)/,$(lib-y)) +subdir-obj-y := $(addprefix $(obj)/,$(subdir-obj-y)) +real-obj-y := $(addprefix $(obj)/,$(real-obj-y)) +real-obj-m := $(addprefix $(obj)/,$(real-obj-m)) +single-used-m := $(addprefix $(obj)/,$(single-used-m)) +multi-used-m := $(addprefix $(obj)/,$(multi-used-m)) +subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) + +# Finds the multi-part object the current object will be linked into. +# If the object belongs to two or more multi-part objects, all of them are +# concatenated with a colon separator. +modname-multi = $(subst $(space),:,$(sort $(foreach m,$(multi-used),\ + $(if $(filter $*.o, $($(m:.o=-objs)) $($(m:.o=-y)) $($(m:.o=-m))),$(m:.o=))))) + +modname = $(if $(modname-multi),$(modname-multi),$(basetarget)) + +# 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 = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote) +basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget)) +modname_flags = -DKBUILD_MODNAME=$(call name-fix,$(modname)) + +orig_c_flags = $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) \ + $(ccflags-y) $(CFLAGS_$(basetarget).o) +_c_flags = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(orig_c_flags)) +orig_a_flags = $(KBUILD_CPPFLAGS) $(KBUILD_AFLAGS) \ + $(asflags-y) $(AFLAGS_$(basetarget).o) +_a_flags = $(filter-out $(AFLAGS_REMOVE_$(basetarget).o), $(orig_a_flags)) +_cpp_flags = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(@F)) + +# +# 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_$(basetarget).o)$(GCOV_PROFILE)$(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) +_c_flags += $(if $(patsubst n%,, \ + $(KASAN_SANITIZE_$(basetarget).o)$(KASAN_SANITIZE)y), \ + $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) +endif + +ifeq ($(CONFIG_UBSAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ + $(CFLAGS_UBSAN)) +endif + +ifeq ($(CONFIG_KCOV),y) +_c_flags += $(if $(patsubst n%,, \ + $(KCOV_INSTRUMENT_$(basetarget).o)$(KCOV_INSTRUMENT)$(CONFIG_KCOV_INSTRUMENT_ALL)), \ + $(CFLAGS_KCOV)) +endif + +# If building the kernel in a separate objtree expand all occurrences +# of -Idir to -I$(srctree)/dir except for absolute paths (starting with '/'). + +ifeq ($(KBUILD_SRC),) +__c_flags = $(_c_flags) +__a_flags = $(_a_flags) +__cpp_flags = $(_cpp_flags) +else + +# -I$(obj) locates generated .h files +# $(call addtree,-I$(obj)) locates .h files in srctree, from generated .c files +# and locates generated .h files +# FIXME: Replace both with specific CFLAGS* statements in the makefiles +__c_flags = $(if $(obj),$(call addtree,-I$(src)) -I$(obj)) \ + $(call flags,_c_flags) +__a_flags = $(call flags,_a_flags) +__cpp_flags = $(call flags,_cpp_flags) +endif + +c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + -include $(srctree)/include/linux/compiler_types.h \ + $(__c_flags) $(modkern_cflags) \ + $(basename_flags) $(modname_flags) + +a_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + $(__a_flags) $(modkern_aflags) + +cpp_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \ + $(__cpp_flags) + +ld_flags = $(KBUILD_LDFLAGS) $(ldflags-y) $(LDFLAGS_$(@F)) + +DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes + +dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \ + $(addprefix -I,$(DTC_INCLUDE)) \ + -undef -D__DTS__ + +# 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, $(notdir $1), \ + $(eval $(obj)/$m: \ + $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) +endef + +# 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 $@ + cmd_bison = $(YACC) -o$@ -t -l $< + +$(obj)/%.tab.c: $(src)/%.y FORCE + $(call if_changed,bison) + +quiet_cmd_bison_h = YACC $@ + cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l $< + +$(obj)/%.tab.h: $(src)/%.y FORCE + $(call if_changed,bison_h) + +# Shipped files +# =========================================================================== + +quiet_cmd_shipped = SHIPPED $@ +cmd_shipped = cat $< > $@ + +$(obj)/%: $(src)/%_shipped + $(call cmd,shipped) + +# Commands useful for building a boot image +# =========================================================================== +# +# Use as following: +# +# target: source(s) FORCE +# $(if_changed,ld/objcopy/gzip) +# +# and add target to extra-y so that we know we have to +# read in the saved command line + +# Linking +# --------------------------------------------------------------------------- + +quiet_cmd_ld = LD $@ +cmd_ld = $(LD) $(ld_flags) $(filter-out FORCE,$^) -o $@ + +# Objcopy +# --------------------------------------------------------------------------- + +quiet_cmd_objcopy = OBJCOPY $@ +cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@ + +# Gzip +# --------------------------------------------------------------------------- + +quiet_cmd_gzip = GZIP $@ +cmd_gzip = (cat $(filter-out FORCE,$^) | gzip -n -f -9 > $@) || \ + (rm -f $@ ; false) + +# DTC +# --------------------------------------------------------------------------- +DTC ?= $(objtree)/scripts/dtc/dtc + +# Disable noisy checks by default +ifeq ($(findstring 1,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) +DTC_FLAGS += -Wno-unit_address_vs_reg \ + -Wno-unit_address_format \ + -Wno-avoid_unnecessary_addr_size \ + -Wno-alias_paths \ + -Wno-graph_child_address \ + -Wno-graph_port \ + -Wno-simple_bus_reg \ + -Wno-unique_unit_address \ + -Wno-pci_device_reg +endif + +ifneq ($(findstring 2,$(KBUILD_ENABLE_EXTRA_GCC_CHECKS)),) +DTC_FLAGS += -Wnode_name_chars_strict \ + -Wproperty_name_chars_strict +endif + +DTC_FLAGS += $(DTC_FLAGS_$(basetarget)) + +# Generate an assembly file to wrap the output of the device tree compiler +quiet_cmd_dt_S_dtb= DTB $@ +cmd_dt_S_dtb= \ +( \ + echo '\#include <asm-generic/vmlinux.lds.h>'; \ + echo '.section .dtb.init.rodata,"a"'; \ + echo '.balign STRUCT_ALIGNMENT'; \ + echo '.global __dtb_$(subst -,_,$(*F))_begin'; \ + echo '__dtb_$(subst -,_,$(*F))_begin:'; \ + echo '.incbin "$<" '; \ + echo '__dtb_$(subst -,_,$(*F))_end:'; \ + echo '.global __dtb_$(subst -,_,$(*F))_end'; \ + echo '.balign STRUCT_ALIGNMENT'; \ +) > $@ + +$(obj)/%.dtb.S: $(obj)/%.dtb FORCE + $(call if_changed,dt_S_dtb) + +quiet_cmd_dtc = DTC $@ +cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \ + $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \ + $(DTC) -O dtb -o $@ -b 0 \ + $(addprefix -i,$(dir $<) $(DTC_INCLUDE)) $(DTC_FLAGS) \ + -d $(depfile).dtc.tmp $(dtc-tmp) ; \ + cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile) + +$(obj)/%.dtb: $(src)/%.dts $(DTC) FORCE + $(call if_changed_dep,dtc) + +dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp) + +# 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 $1; 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_bzip2 = BZIP2 $@ +cmd_bzip2 = (cat $(filter-out FORCE,$^) | \ + bzip2 -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + +# Lzma +# --------------------------------------------------------------------------- + +quiet_cmd_lzma = LZMA $@ +cmd_lzma = (cat $(filter-out FORCE,$^) | \ + lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + +quiet_cmd_lzo = LZO $@ +cmd_lzo = (cat $(filter-out FORCE,$^) | \ + lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + +quiet_cmd_lz4 = LZ4 $@ +cmd_lz4 = (cat $(filter-out FORCE,$^) | \ + lz4c -l -c1 stdin stdout && $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + +# 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 ?= $(if $(2),$(2),none) +UIMAGE_OPTS-y ?= +UIMAGE_TYPE ?= kernel +UIMAGE_LOADADDR ?= arch_must_set_this +UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) +UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' +UIMAGE_IN ?= $< +UIMAGE_OUT ?= $@ + +quiet_cmd_uimage = UIMAGE $(UIMAGE_OUT) + cmd_uimage = $(CONFIG_SHELL) $(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 $(UIMAGE_IN) $(UIMAGE_OUT) + +# XZ +# --------------------------------------------------------------------------- +# Use xzkern 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 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 $(filter-out FORCE,$^) | \ + sh $(srctree)/scripts/xz_wrap.sh && \ + $(call size_append, $(filter-out FORCE,$^))) > $@ || \ + (rm -f $@ ; false) + +quiet_cmd_xzmisc = XZMISC $@ +cmd_xzmisc = (cat $(filter-out FORCE,$^) | \ + xz --check=crc32 --lzma2=dict=1MiB) > $@ || \ + (rm -f $@ ; false) + +# 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 + (set -e; \ + 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 diff --git a/scripts/Makefile.modbuiltin b/scripts/Makefile.modbuiltin new file mode 100644 index 000000000..a072a4267 --- /dev/null +++ b/scripts/Makefile.modbuiltin @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# Generating modules.builtin +# ========================================================================== + +src := $(obj) + +PHONY := __modbuiltin +__modbuiltin: + +include include/config/auto.conf +# tristate.conf sets tristate variables to uppercase 'Y' or 'M' +# That way, we get the list of built-in modules in obj-Y +include include/config/tristate.conf + +include scripts/Kbuild.include + +ifneq ($(KBUILD_SRC),) +# Create output directory if not already present +_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj)) +endif + +# The filename Kbuild has precedence over Makefile +kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src)) +kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile) +include $(kbuild-file) + +include scripts/Makefile.lib +__subdir-Y := $(patsubst %/,%,$(filter %/, $(obj-Y))) +subdir-Y += $(__subdir-Y) +subdir-ym := $(sort $(subdir-y) $(subdir-Y) $(subdir-m)) +subdir-ym := $(addprefix $(obj)/,$(subdir-ym)) +obj-Y := $(addprefix $(obj)/,$(obj-Y)) + +modbuiltin-subdirs := $(patsubst %,%/modules.builtin, $(subdir-ym)) +modbuiltin-mods := $(filter %.ko, $(obj-Y:.o=.ko)) +modbuiltin-target := $(obj)/modules.builtin + +__modbuiltin: $(modbuiltin-target) $(subdir-ym) + @: + +$(modbuiltin-target): $(subdir-ym) FORCE + $(Q)(for m in $(modbuiltin-mods); do echo kernel/$$m; done; \ + cat /dev/null $(modbuiltin-subdirs)) > $@ + +PHONY += FORCE + +FORCE: + +# Descending +# --------------------------------------------------------------------------- + +PHONY += $(subdir-ym) +$(subdir-ym): + $(Q)$(MAKE) $(modbuiltin)=$@ + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.modinst b/scripts/Makefile.modinst new file mode 100644 index 000000000..ff5ca9817 --- /dev/null +++ b/scripts/Makefile.modinst @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# Installing modules +# ========================================================================== + +PHONY := __modinst +__modinst: + +include scripts/Kbuild.include + +# + +__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod))) +modules := $(patsubst %.o,%.ko,$(wildcard $(__modules:.ko=.o))) + +PHONY += $(modules) +__modinst: $(modules) + @: + +# Don't stop modules_install if we can't sign external modules. +quiet_cmd_modules_install = INSTALL $@ + cmd_modules_install = \ + mkdir -p $(2) ; \ + cp $@ $(2) ; \ + $(mod_strip_cmd) $(2)/$(notdir $@) ; \ + $(mod_sign_cmd) $(2)/$(notdir $@) $(patsubst %,|| true,$(KBUILD_EXTMOD)) && \ + $(mod_compress_cmd) $(2)/$(notdir $@) + +# Modules built outside the kernel source tree go into extra by default +INSTALL_MOD_DIR ?= extra +ext-mod-dir = $(INSTALL_MOD_DIR)$(subst $(patsubst %/,%,$(KBUILD_EXTMOD)),,$(@D)) + +modinst_dir = $(if $(KBUILD_EXTMOD),$(ext-mod-dir),kernel/$(@D)) + +$(modules): + $(call cmd,modules_install,$(MODLIB)/$(modinst_dir)) + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost new file mode 100644 index 000000000..51884c7b8 --- /dev/null +++ b/scripts/Makefile.modpost @@ -0,0 +1,152 @@ +# 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 in $(MODVERDIR)/, listing the name of the +# the preliminary <module>.o file, plus all .o files + +# Stage 2 is handled by this file and does the following +# 1) Find all modules from the files listed in $(MODVERDIR)/ +# 2) modpost is then used to +# 3) create one <module>.mod.c file pr. module +# 4) create one Module.symvers file with CRC for all exported symbols +# 5) compile all <module>.mod.c files +# 6) final link of the module to a <module.ko> file + +# Step 3 is used to place certain information in the module's ELF +# section, including information such as: +# Version magic (see include/linux/vermagic.h for full details) +# - Kernel release +# - SMP is CONFIG_SMP +# - PREEMPT is CONFIG_PREEMPT +# - GCC Version +# Module info +# - Module version (MODULE_VERSION) +# - Module alias'es (MODULE_ALIAS) +# - Module license (MODULE_LICENSE) +# - See include/linux/module.h for more details + +# Step 4 is solely used to allow module versioning in external modules, +# where the CRC of each module is retrieved from the Module.symvers file. + +# KBUILD_MODPOST_WARN can be set to avoid error out in case of undefined +# symbols in the final module linking stage +# KBUILD_MODPOST_NOFINAL can be set to skip the final link of modules. +# This is solely useful to speed up test compiles +PHONY := _modpost +_modpost: __modpost + +include include/config/auto.conf +include scripts/Kbuild.include + +# When building external modules load the Kbuild file to retrieve EXTRA_SYMBOLS info +ifneq ($(KBUILD_EXTMOD),) + +# set src + obj - they may be used when building the .mod.c file +obj := $(KBUILD_EXTMOD) +src := $(obj) + +# Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS +include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \ + $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile) +endif + +include scripts/Makefile.lib + +kernelsymfile := $(objtree)/Module.symvers +modulesymfile := $(firstword $(KBUILD_EXTMOD))/Module.symvers + +# Step 1), find all modules listed in $(MODVERDIR)/ +MODLISTCMD := find $(MODVERDIR) -name '*.mod' | xargs -r grep -h '\.ko$$' | sort -u +__modules := $(shell $(MODLISTCMD)) +modules := $(patsubst %.o,%.ko, $(wildcard $(__modules:.ko=.o))) + +# Stop after building .o files if NOFINAL is set. Makes compile tests quicker +_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules)) + +# Step 2), invoke modpost +# Includes step 3,4 +modpost = scripts/mod/modpost \ + $(if $(CONFIG_MODVERSIONS),-m) \ + $(if $(CONFIG_MODULE_SRCVERSION_ALL),-a,) \ + $(if $(KBUILD_EXTMOD),-i,-o) $(kernelsymfile) \ + $(if $(KBUILD_EXTMOD),-I $(modulesymfile)) \ + $(if $(KBUILD_EXTMOD),$(addprefix -e ,$(KBUILD_EXTRA_SYMBOLS))) \ + $(if $(KBUILD_EXTMOD),-o $(modulesymfile)) \ + $(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \ + $(if $(CONFIG_SECTION_MISMATCH_WARN_ONLY),,-E) \ + $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) + +MODPOST_OPT=$(subst -i,-n,$(filter -i,$(MAKEFLAGS))) + +# We can go over command line length here, so be careful. +quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules + cmd_modpost = $(MODLISTCMD) | sed 's/\.ko$$/.o/' | $(modpost) $(MODPOST_OPT) -s -T - + +PHONY += __modpost +__modpost: $(modules:.ko=.o) FORCE + $(call cmd,modpost) $(wildcard vmlinux) + +quiet_cmd_kernel-mod = MODPOST $@ + cmd_kernel-mod = $(modpost) $@ + +vmlinux.o: FORCE + $(call cmd,kernel-mod) + +# Declare generated files as targets for modpost +$(modules:.ko=.mod.c): __modpost ; + + +# Step 5), compile all *.mod.c files + +# modname is set to make c_flags define KBUILD_MODNAME +modname = $(notdir $(@:.mod.o=)) + +quiet_cmd_cc_o_c = CC $@ + cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \ + -c -o $@ $< + +$(modules:.ko=.mod.o): %.mod.o: %.mod.c FORCE + $(call if_changed_dep,cc_o_c) + +targets += $(modules:.ko=.mod.o) + +ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) + +# Step 6), final link of the modules with optional arch pass after final link +quiet_cmd_ld_ko_o = LD [M] $@ + cmd_ld_ko_o = \ + $(LD) -r $(KBUILD_LDFLAGS) \ + $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ + -o $@ $(filter-out FORCE,$^) ; \ + $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) + +$(modules): %.ko :%.o %.mod.o FORCE + +$(call if_changed,ld_ko_o) + +targets += $(modules) + + +# Add FORCE to the prequisites 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. + +cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd)) + +ifneq ($(cmd_files),) + include $(cmd_files) +endif + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.modsign b/scripts/Makefile.modsign new file mode 100644 index 000000000..da56aa78d --- /dev/null +++ b/scripts/Makefile.modsign @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0 +# ========================================================================== +# Signing modules +# ========================================================================== + +PHONY := __modsign +__modsign: + +include scripts/Kbuild.include + +__modules := $(sort $(shell grep -h '\.ko$$' /dev/null $(wildcard $(MODVERDIR)/*.mod))) +modules := $(patsubst %.o,%.ko,$(wildcard $(__modules:.ko=.o))) + +PHONY += $(modules) +__modsign: $(modules) + @: + +quiet_cmd_sign_ko = SIGN [M] $(2)/$(notdir $@) + cmd_sign_ko = $(mod_sign_cmd) $(2)/$(notdir $@) + +# Modules built outside the kernel source tree go into extra by default +INSTALL_MOD_DIR ?= extra +ext-mod-dir = $(INSTALL_MOD_DIR)$(subst $(patsubst %/,%,$(KBUILD_EXTMOD)),,$(@D)) + +modinst_dir = $(if $(KBUILD_EXTMOD),$(ext-mod-dir),kernel/$(@D)) + +$(modules): + $(call cmd,sign_ko,$(MODLIB)/$(modinst_dir)) + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.ubsan b/scripts/Makefile.ubsan new file mode 100644 index 000000000..38b2b4818 --- /dev/null +++ b/scripts/Makefile.ubsan @@ -0,0 +1,20 @@ +# SPDX-License-Identifier: GPL-2.0 +ifdef CONFIG_UBSAN + CFLAGS_UBSAN += $(call cc-option, -fsanitize=shift) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=integer-divide-by-zero) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=unreachable) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=vla-bound) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=signed-integer-overflow) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=bounds) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=object-size) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=bool) + CFLAGS_UBSAN += $(call cc-option, -fsanitize=enum) + +ifdef CONFIG_UBSAN_ALIGNMENT + CFLAGS_UBSAN += $(call cc-option, -fsanitize=alignment) +endif + + # -fsanitize=* options makes GCC less smart than usual and + # increase number of 'maybe-uninitialized false-positives + CFLAGS_UBSAN += $(call cc-option, -Wno-maybe-uninitialized) +endif |