diff options
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 181 |
1 files changed, 85 insertions, 96 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 01a9f567d5af..1d581ba5df66 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -1,93 +1,4 @@ # 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) -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 # 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. @@ -166,14 +77,17 @@ _c_flags += $(if $(patsubst n%,, \ $(UBSAN_SANITIZE_$(target-stem).o)$(UBSAN_SANITIZE)$(is-kernel-object)), \ $(CFLAGS_UBSAN)) _c_flags += $(if $(patsubst n%,, \ - $(UBSAN_SIGNED_WRAP_$(target-stem).o)$(UBSAN_SANITIZE_$(target-stem).o)$(UBSAN_SIGNED_WRAP)$(UBSAN_SANITIZE)$(is-kernel-object)), \ - $(CFLAGS_UBSAN_SIGNED_WRAP)) + $(UBSAN_INTEGER_WRAP_$(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 # @@ -191,15 +105,33 @@ _c_flags += $(if $(patsubst n%,, \ -D__KCSAN_INSTRUMENT_BARRIERS__) endif +# +# Enable AutoFDO build flags except some files or directories we don't want to +# enable (depends on variables AUTOFDO_PROFILE_obj.o and AUTOFDO_PROFILE). +# +ifeq ($(CONFIG_AUTOFDO_CLANG),y) +_c_flags += $(if $(patsubst n%,, \ + $(AUTOFDO_PROFILE_$(target-stem).o)$(AUTOFDO_PROFILE)$(is-kernel-object)), \ + $(CFLAGS_AUTOFDO_CLANG)) +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 # $(obj) for including generated headers from checkin source files -ifeq ($(KBUILD_EXTMOD),) ifdef building_out_of_srctree _c_flags += $(addprefix -I, $(src) $(obj)) _a_flags += $(addprefix -I, $(src) $(obj)) _cpp_flags += $(addprefix -I, $(src) $(obj)) endif -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)) @@ -257,8 +189,9 @@ 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-$(CONFIG_GCOV_KERNEL) += --no-unreachable +objtool-args-$(or $(CONFIG_GCOV_KERNEL),$(CONFIG_KCOV)) += --no-unreachable objtool-args-$(CONFIG_PREFIX_SYMBOLS) += --prefix=$(CONFIG_FUNCTION_PADDING_BYTES) +objtool-args-$(CONFIG_OBJTOOL_WERROR) += --Werror objtool-args = $(objtool-args-y) \ $(if $(delay-objtool), --link) \ @@ -269,6 +202,8 @@ delay-objtool := $(or $(CONFIG_LTO_CLANG),$(CONFIG_X86_KERNEL_IBT)) 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 @@ -280,6 +215,55 @@ $(foreach m, $1, \ $(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 + +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,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, @@ -291,6 +275,11 @@ quiet_cmd_copy = COPY $@ $(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 # =========================================================================== # @@ -371,10 +360,10 @@ 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 -c1 stdin stdout > $@ + cmd_lz4 = cat $(real-prereqs) | $(LZ4) -l -9 - - > $@ quiet_cmd_lz4_with_size = LZ4 $@ - cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -c1 stdin stdout; \ + cmd_lz4_with_size = { cat $(real-prereqs) | $(LZ4) -l -9 - -; \ $(size_append); } > $@ # U-Boot mkimage |