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-rw-r--r--scripts/Makefile.build128
1 files changed, 49 insertions, 79 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 6a6be9f440cf..fd03d60f6c5a 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -75,14 +75,14 @@ __build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
# Linus' kernel sanity checking tool
ifeq ($(KBUILD_CHECKSRC),1)
quiet_cmd_checksrc = CHECK $<
- cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
+ cmd_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
else ifeq ($(KBUILD_CHECKSRC),2)
quiet_cmd_force_checksrc = CHECK $<
- cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
+ cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $<
endif
ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),)
- cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ;
+ cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
endif
# Do section mismatch analysis for each module/built-in.a
@@ -94,23 +94,14 @@ endif
# ---------------------------------------------------------------------------
# Default is built-in, unless we know otherwise
+$(foreach x, i ll lst o s symtypes, $(patsubst %.o,%.$(x),$(real-obj-m))): \
+ part-of-module := y
+
modkern_cflags = \
$(if $(part-of-module), \
$(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
$(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
-quiet_modtag := $(empty) $(empty)
-
-$(real-obj-m) : part-of-module := y
-$(real-obj-m:.o=.i) : part-of-module := y
-$(real-obj-m:.o=.s) : part-of-module := y
-$(real-obj-m:.o=.lst): part-of-module := y
-
-$(real-obj-m) : quiet_modtag := [M]
-$(real-obj-m:.o=.i) : quiet_modtag := [M]
-$(real-obj-m:.o=.s) : quiet_modtag := [M]
-$(real-obj-m:.o=.lst): quiet_modtag := [M]
-
-$(obj-m) : quiet_modtag := [M]
+quiet_modtag = $(if $(part-of-module),[M], )
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<
@@ -134,7 +125,6 @@ cmd_gensymtypes_c = \
quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
cmd_cc_symtypes_c = \
- set -e; \
$(call cmd_gensymtypes_c,true,$@) >/dev/null; \
test -s $@ || rm -f $@
@@ -154,36 +144,31 @@ $(obj)/%.ll: $(src)/%.c FORCE
# (See cmd_cc_o_c + relevant part of rule_cc_o_c)
quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
+ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
-ifndef CONFIG_MODVERSIONS
-cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
-
-else
+ifdef CONFIG_MODVERSIONS
# When module versioning is enabled the following steps are executed:
-# o compile a .tmp_<file>.o from <file>.c
-# o if .tmp_<file>.o doesn't contain a __ksymtab version, i.e. does
-# not export symbols, we just rename .tmp_<file>.o to <file>.o and
-# are done.
+# o compile a <file>.o from <file>.c
+# o if <file>.o doesn't contain a __ksymtab version, i.e. does
+# not export symbols, it's done.
# o otherwise, we calculate symbol versions using the good old
# genksyms on the preprocessed source and postprocess them in a way
# that they are usable as a linker script
-# o generate <file>.o from .tmp_<file>.o using the linker to
+# o generate .tmp_<file>.o from <file>.o using the linker to
# replace the unresolved symbols __crc_exported_symbol with
# the actual value of the checksum generated by genksyms
-
-cmd_cc_o_c = $(CC) $(c_flags) -c -o $(@D)/.tmp_$(@F) $<
+# o remove .tmp_<file>.o to <file>.o
cmd_modversions_c = \
- if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
+ if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \
$(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
> $(@D)/.tmp_$(@F:.o=.ver); \
\
- $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
+ $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \
-T $(@D)/.tmp_$(@F:.o=.ver); \
- rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
- else \
mv -f $(@D)/.tmp_$(@F) $@; \
- fi;
+ rm -f $(@D)/.tmp_$(@F:.o=.ver); \
+ fi
endif
ifdef CONFIG_FTRACE_MCOUNT_RECORD
@@ -204,7 +189,7 @@ sub_cmd_record_mcount = \
recordmcount_source := $(srctree)/scripts/recordmcount.c \
$(srctree)/scripts/recordmcount.h
else
-sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
+sub_cmd_record_mcount = perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
"$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
"$(if $(CONFIG_64BIT),64,32)" \
"$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS)" \
@@ -216,7 +201,7 @@ cmd_record_mcount = \
if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
"$(CC_FLAGS_FTRACE)" ]; then \
$(sub_cmd_record_mcount) \
- fi;
+ fi
endif # CC_USING_RECORD_MCOUNT
endif # CONFIG_FTRACE_MCOUNT_RECORD
@@ -239,19 +224,12 @@ ifdef CONFIG_RETPOLINE
objtool_args += --retpoline
endif
-
-ifdef CONFIG_MODVERSIONS
-objtool_o = $(@D)/.tmp_$(@F)
-else
-objtool_o = $(@)
-endif
-
# 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
# 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
# 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
cmd_objtool = $(if $(patsubst y%,, \
$(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
- $(__objtool_obj) $(objtool_args) "$(objtool_o)";)
+ $(__objtool_obj) $(objtool_args) $@)
objtool_obj = $(if $(patsubst y%,, \
$(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
$(__objtool_obj))
@@ -264,19 +242,26 @@ objtool_dep = $(objtool_obj) \
$(wildcard include/config/orc/unwinder.h \
include/config/stack/validation.h)
+ifdef CONFIG_TRIM_UNUSED_KSYMS
+cmd_gen_ksymdeps = \
+ $(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
+endif
+
define rule_cc_o_c
- $(call echo-cmd,checksrc) $(cmd_checksrc) \
- $(call cmd_and_fixdep,cc_o_c) \
- $(cmd_checkdoc) \
- $(call echo-cmd,objtool) $(cmd_objtool) \
- $(cmd_modversions_c) \
- $(call echo-cmd,record_mcount) $(cmd_record_mcount)
+ $(call cmd,checksrc)
+ $(call cmd_and_fixdep,cc_o_c)
+ $(call cmd,gen_ksymdeps)
+ $(call cmd,checkdoc)
+ $(call cmd,objtool)
+ $(call cmd,modversions_c)
+ $(call cmd,record_mcount)
endef
define rule_as_o_S
- $(call cmd_and_fixdep,as_o_S) \
- $(call echo-cmd,objtool) $(cmd_objtool) \
- $(cmd_modversions_S)
+ $(call cmd_and_fixdep,as_o_S)
+ $(call cmd,gen_ksymdeps)
+ $(call cmd,objtool)
+ $(call cmd,modversions_S)
endef
# List module undefined symbols (or empty line if not enabled)
@@ -340,7 +325,6 @@ cmd_gensymtypes_S = \
quiet_cmd_cc_symtypes_S = SYM $(quiet_modtag) $@
cmd_cc_symtypes_S = \
- set -e; \
$(call cmd_gensymtypes_S,true,$@) >/dev/null; \
test -s $@ || rm -f $@
@@ -355,35 +339,27 @@ $(obj)/%.s: $(src)/%.S FORCE
$(call if_changed_dep,cpp_s_S)
quiet_cmd_as_o_S = AS $(quiet_modtag) $@
+ cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
-ifndef CONFIG_MODVERSIONS
-cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
-
-else
+ifdef CONFIG_MODVERSIONS
ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)
-ifeq ($(ASM_PROTOTYPES),)
-cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
-
-else
+ifneq ($(ASM_PROTOTYPES),)
# versioning matches the C process described above, with difference that
# we parse asm-prototypes.h C header to get function definitions.
-cmd_as_o_S = $(CC) $(a_flags) -c -o $(@D)/.tmp_$(@F) $<
-
cmd_modversions_S = \
- if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
+ if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \
$(call cmd_gensymtypes_S,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
> $(@D)/.tmp_$(@F:.o=.ver); \
\
- $(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) \
+ $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \
-T $(@D)/.tmp_$(@F:.o=.ver); \
- rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver); \
- else \
mv -f $(@D)/.tmp_$(@F) $@; \
- fi;
+ rm -f $(@D)/.tmp_$(@F:.o=.ver); \
+ fi
endif
endif
@@ -527,25 +503,19 @@ FORCE:
# optimization, we don't need to read them if the target does not
# exist, we will rebuild anyway in that case.
-cmd_files := $(wildcard $(foreach f,$(sort $(targets)),$(dir $(f)).$(notdir $(f)).cmd))
+existing-targets := $(wildcard $(sort $(targets)))
-ifneq ($(cmd_files),)
- include $(cmd_files)
-endif
+-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
ifneq ($(KBUILD_SRC),)
# Create directories for object files if they do not exist
obj-dirs := $(sort $(obj) $(patsubst %/,%, $(dir $(targets))))
-# If cmd_files exist, their directories apparently exist. Skip mkdir.
-exist-dirs := $(sort $(patsubst %/,%, $(dir $(cmd_files))))
-obj-dirs := $(strip $(filter-out $(exist-dirs), $(obj-dirs)))
+# If targets exist, their directories apparently exist. Skip mkdir.
+existing-dirs := $(sort $(patsubst %/,%, $(dir $(existing-targets))))
+obj-dirs := $(strip $(filter-out $(existing-dirs), $(obj-dirs)))
ifneq ($(obj-dirs),)
$(shell mkdir -p $(obj-dirs))
endif
endif
-# Some files contained in $(targets) are intermediate artifacts.
-# We never want them to be removed automatically.
-.SECONDARY: $(targets)
-
.PHONY: $(PHONY)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.