From 9370bb92b2d16684ee45cf24e879c93c509162da Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Thu, 19 Dec 2024 01:47:39 +0000
Subject: [PATCH] add wifi6 8852be driver
---
kernel/scripts/Makefile.build | 532 ++++++++++++++++++++++------------------------------------
1 files changed, 203 insertions(+), 329 deletions(-)
diff --git a/kernel/scripts/Makefile.build b/kernel/scripts/Makefile.build
index e510a1f..f90c39a 100644
--- a/kernel/scripts/Makefile.build
+++ b/kernel/scripts/Makefile.build
@@ -16,6 +16,8 @@
lib-y :=
lib-m :=
always :=
+always-y :=
+always-m :=
targets :=
subdir-y :=
subdir-m :=
@@ -36,96 +38,80 @@
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),)
+# Do not include hostprogs rules unless needed.
+# $(sort ...) is used here to remove duplicated words and excessive spaces.
+hostprogs := $(sort $(hostprogs))
+ifneq ($(hostprogs),)
include scripts/Makefile.host
+endif
+
+# Do not include userprogs rules unless needed.
+# $(sort ...) is used here to remove duplicated words and excessive spaces.
+userprogs := $(sort $(userprogs))
+ifneq ($(userprogs),)
+include scripts/Makefile.userprogs
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-)),)
-lib-target := $(obj)/lib.a
-real-obj-y += $(obj)/lib-ksyms.o
+targets-for-builtin += $(obj)/lib.a
endif
-ifneq ($(strip $(real-obj-y) $(need-builtin)),)
-builtin-target := $(obj)/built-in.a
+ifdef need-builtin
+targets-for-builtin += $(obj)/built-in.a
endif
-modorder-target := $(obj)/modules.order
+targets-for-modules := $(patsubst %.o, %.mod, $(filter %.o, $(obj-m)))
-# We keep a list of all modules in $(MODVERDIR)
+ifdef need-modorder
+targets-for-modules += $(obj)/modules.order
+endif
-__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
- $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
- $(subdir-ym) $(always)
- @:
+targets += $(targets-for-builtin) $(targets-for-modules)
# Linus' kernel sanity checking tool
-ifneq ($(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) $< ;
- endif
+ifeq ($(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) $<
endif
-ifneq ($(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 $@
+ifneq ($(KBUILD_EXTRA_WARN),)
+ cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $<
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 $@ $<
+ cmd_cc_s_c = $(CC) -fverbose-asm $(filter-out $(DEBUG_CFLAGS) $(CC_FLAGS_LTO), $(c_flags)) -S -o $@ $<
$(obj)/%.s: $(src)/%.c FORCE
$(call if_changed_dep,cc_s_c)
@@ -139,14 +125,13 @@
# These mirror gensymtypes_S and co below, keep them in synch.
cmd_gensymtypes_c = \
$(CPP) -D__GENKSYMS__ $(c_flags) $< | \
- $(GENKSYMS) $(if $(1), -T $(2)) \
+ scripts/genksyms/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 $@
@@ -166,69 +151,49 @@
# (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
ifdef CONFIG_LTO_CLANG
# Generate .o.symversions files for each .o with exported symbols, and link these
# to the kernel and/or modules at the end.
cmd_modversions_c = \
- if $(OBJDUMP) -h $(@D)/.tmp_$(@F) >/dev/null 2>/dev/null; then \
- if $(OBJDUMP) -h $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
- $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
- > $(@D)/$(@F).symversions; \
- fi; \
- else \
- if $(LLVM_NM) $(@D)/.tmp_$(@F) | grep -q __ksymtab; then \
- $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
- > $(@D)/$(@F).symversions; \
- fi; \
- fi; \
- mv -f $(@D)/.tmp_$(@F) $@;
+ if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \
+ $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \
+ > $@.symversions; \
+ fi;
else
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
endif
-ifdef CONFIG_FTRACE_MCOUNT_RECORD
-ifndef CC_USING_RECORD_MCOUNT
+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
-
-ifdef CONFIG_LTO_CLANG
-# With LTO, we postpone running recordmcount until after the LTO link step, so
-# let's export the parameters for the link script.
-export RECORDMCOUNT_FLAGS
-else
# 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
@@ -237,68 +202,39 @@
if [ $(@) != "scripts/mod/empty.o" ]; then \
$(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)"; \
fi;
-endif
-
recordmcount_source := $(srctree)/scripts/recordmcount.c \
$(srctree)/scripts/recordmcount.h
-else # !BUILD_C_RECORDMCOUNT
-sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
+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 := $(srctree)/scripts/recordmcount.pl
endif # BUILD_C_RECORDMCOUNT
-
-ifndef CONFIG_LTO_CLANG
-cmd_record_mcount = \
- if [ "$(findstring $(CC_FLAGS_FTRACE),$(_c_flags))" = \
- "$(CC_FLAGS_FTRACE)" ]; then \
- $(sub_cmd_record_mcount) \
- fi;
-endif # CONFIG_LTO_CLANG
-endif # CC_USING_RECORD_MCOUNT
-endif # CONFIG_FTRACE_MCOUNT_RECORD
+cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)), \
+ $(sub_cmd_record_mcount))
+endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
ifdef CONFIG_STACK_VALIDATION
+ifndef CONFIG_LTO_CLANG
ifneq ($(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) $(objtool_args) $@)
objtool_obj = $(if $(patsubst y%,, \
$(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
$(__objtool_obj))
endif # SKIP_STACK_VALIDATION
+endif # CONFIG_LTO_CLANG
endif # CONFIG_STACK_VALIDATION
# Rebuild all objects when objtool changes, or is enabled/disabled.
@@ -306,40 +242,44 @@
$(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
+
+# List module undefined symbols
+undefined_syms = $(NM) $< | $(AWK) '$$1 == "U" { printf("%s%s", x++ ? " " : "", $$2) }';
+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_and_fixdep,cc_o_c)
+ $(call cmd,gen_ksymdeps)
+ $(call cmd,checksrc)
+ $(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)
-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
- $(call cmd,force_checksrc)
+.SECONDEXPANSION:
+$(obj)/%.o: $(src)/%.c $(recordmcount_source) $$(objtool_dep) FORCE
$(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)
+
+cmd_mod = { \
+ echo $(if $($*-objs)$($*-y)$($*-m), $(addprefix $(obj)/, $($*-objs) $($*-y) $($*-m)), $(@:.mod=.o)); \
+ $(undefined_syms) echo; \
+ } > $@
+
+$(obj)/%.mod: $(obj)/%.o FORCE
+ $(call if_changed,mod)
quiet_cmd_cc_lst_c = MKLST $@
cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
@@ -351,11 +291,6 @@
# 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
@@ -369,20 +304,19 @@
#
# These mirror gensymtypes_c and co above, keep them in synch.
cmd_gensymtypes_S = \
- (echo "\#include <linux/kernel.h>" ; \
+ { 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);/' ) | \
+ sed 's/.*___EXPORT_SYMBOL[[:space:]]*\([a-zA-Z0-9_]*\)[[:space:]]*,.*/EXPORT_SYMBOL(\1);/' ; } | \
$(CPP) -D__GENKSYMS__ $(c_flags) -xc - | \
- $(GENKSYMS) $(if $(1), -T $(2)) \
+ scripts/genksyms/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 $@
@@ -397,43 +331,31 @@
$(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
-
-ASM_PROTOTYPES := $(wildcard $(srctree)/arch/$(SRCARCH)/include/asm/asm-prototypes.h)
-
-ifeq ($(ASM_PROTOTYPES),)
-cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
-
-else
+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_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;
-endif
+ rm -f $(@D)/.tmp_$(@F:.o=.ver); \
+ fi
endif
-$(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE
+$(obj)/%.o: $(src)/%.S $$(objtool_dep) FORCE
$(call if_changed_rule,as_o_S)
-targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y)
-targets += $(extra-y) $(MAKECMDGOALS) $(always)
+targets += $(filter-out $(subdir-builtin), $(real-obj-y))
+targets += $(filter-out $(subdir-modorder), $(real-obj-m))
+targets += $(lib-y) $(always-y) $(MAKECMDGOALS)
# Linker scripts preprocessor (.lds.S -> .lds)
# ---------------------------------------------------------------------------
@@ -446,9 +368,9 @@
# ASN.1 grammar
# ---------------------------------------------------------------------------
-quiet_cmd_asn1_compiler = ASN.1 $@
+quiet_cmd_asn1_compiler = ASN.1 $(basename $@).[ch]
cmd_asn1_compiler = $(objtree)/scripts/asn1_compiler $< \
- $(subst .h,.c,$@) $(subst .c,.h,$@)
+ $(basename $@).c $(basename $@).h
$(obj)/%.asn1.c $(obj)/%.asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler
$(call cmd,asn1_compiler)
@@ -457,158 +379,75 @@
# ---------------------------------------------------------------------------
# To build objects in subdirs, we need to descend into the directories
-$(sort $(subdir-obj-y)): $(subdir-ym) ;
+$(subdir-builtin): $(obj)/%/built-in.a: $(obj)/% ;
+$(subdir-modorder): $(obj)/%/modules.order: $(obj)/% ;
-ifdef CONFIG_LTO_CLANG
- ifdef CONFIG_MODVERSIONS
- # combine symversions for later processing
- update_lto_symversions = \
- rm -f $@.symversions; \
- for i in $(foreach n, \
- $(filter-out FORCE,$^), \
- $(if $(wildcard $(n).symversions),$(n))); do \
- cat $$i.symversions >> $@.symversions; \
- done;
- endif
- # rebuild the symbol table with llvm-ar to include IR files
- update_lto_symtable = ; \
- mv -f $@ $@.tmp; \
- $(LLVM_AR) rcsT$(KBUILD_ARFLAGS) $@ \
- $$($(AR) t $@.tmp); \
- rm -f $@.tmp
+# combine symversions for later processing
+quiet_cmd_update_lto_symversions = SYMVER $@
+ifeq ($(CONFIG_LTO_CLANG) $(CONFIG_MODVERSIONS),y y)
+ cmd_update_lto_symversions = \
+ rm -f $@.symversions \
+ $(foreach n, $(filter-out FORCE,$^), \
+ $(if $(shell test -s $(n).symversions && echo y), \
+ ; cat $(n).symversions >> $@.symversions))
+else
+ cmd_update_lto_symversions = echo >/dev/null
endif
#
-# Rule to compile a set of .o files into one .o file
+# Rule to compile a set of .o files into one .a file (without symbol table)
#
-ifdef builtin-target
-# built-in.a archives are made with no symbol table or index which
-# makes them small and fast, but unable to be used by the linker.
-# scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol
-# table and index.
quiet_cmd_ar_builtin = AR $@
- cmd_ar_builtin = $(update_lto_symversions) \
- rm -f $@; \
- $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^)
+ cmd_ar_builtin = rm -f $@; $(AR) cDPrST $@ $(real-prereqs)
-$(builtin-target): $(real-obj-y) FORCE
- $(call if_changed,ar_builtin)
+quiet_cmd_ar_and_symver = AR $@
+ cmd_ar_and_symver = $(cmd_update_lto_symversions); $(cmd_ar_builtin)
-targets += $(builtin-target)
-endif # builtin-target
+$(obj)/built-in.a: $(real-obj-y) FORCE
+ $(call if_changed,ar_and_symver)
#
# Rule to create modules.order file
#
# Create commands to either record .ko file or cat modules.order from
# a subdirectory
-modorder-cmds = \
- $(foreach m, $(modorder), \
- $(if $(filter %/modules.order, $m), \
- cat $m;, echo kernel/$m;))
+# Add $(obj-m) as the prerequisite to avoid updating the timestamp of
+# modules.order unless contained modules are updated.
-$(modorder-target): $(subdir-ym) FORCE
- $(Q)(cat /dev/null; $(modorder-cmds)) > $@
+cmd_modules_order = { $(foreach m, $(real-prereqs), \
+ $(if $(filter %/modules.order, $m), cat $m, echo $(patsubst %.o,%.ko,$m));) :; } \
+ | $(AWK) '!x[$$0]++' - > $@
+
+$(obj)/modules.order: $(obj-m) FORCE
+ $(call if_changed,modules_order)
#
-# Rule to compile a set of .o files into one .a file
+# Rule to compile a set of .o files into one .a file (with symbol table)
#
-ifdef lib-target
-quiet_cmd_link_l_target = AR $@
+quiet_cmd_ar_lib = AR $@
+ cmd_ar_lib = $(cmd_update_lto_symversions); $(cmd_ar)
-# lib target archives do get a symbol table and index
-cmd_link_l_target = \
- $(update_lto_symversions) \
- rm -f $@; \
- $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) \
- $(update_lto_symtable)
+$(obj)/lib.a: $(lib-y) FORCE
+ $(call if_changed,ar_lib)
-$(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 $@
-filter_export_list = sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p'
-link_export_list = 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)
-
+# NOTE:
+# Do not replace $(filter %.o,^) with $(real-prereqs). When a single object
+# module is turned into a multi object module, $^ will contain header file
+# dependencies recorded in the .*.cmd file.
ifdef CONFIG_LTO_CLANG
-# objdump doesn't understand IR files and llvm-nm doesn't support archives,
-# so we'll walk through each file in the archive separately
-cmd_export_list = \
- rm -f $(ksyms-lds); \
- for o in $$($(AR) t $<); do \
- if $(OBJDUMP) -h $$o >/dev/null 2>/dev/null; then \
- $(OBJDUMP) -h $$o | \
- $(filter_export_list) \
- >>$(ksyms-lds); \
- else \
- $(LLVM_NM) $$o | \
- $(filter_export_list) \
- >>$(ksyms-lds); \
- fi; \
- done; \
- $(link_export_list)
+quiet_cmd_link_multi-m = AR [M] $@
+cmd_link_multi-m = \
+ $(cmd_update_lto_symversions); \
+ rm -f $@; \
+ $(AR) cDPrsT $@ $(filter %.o %.a,$^)
else
-cmd_export_list = $(OBJDUMP) -h $< | $(filter_export_list) >$(ksyms-lds); \
- $(link_export_list)
-endif
-
-$(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)))), $^)
-
-cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis)
-
-quiet_cmd_link_multi-y = AR $@
-cmd_link_multi-y = $(update_lto_symversions) \
- rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps) \
- $(update_lto_symtable)
-
quiet_cmd_link_multi-m = LD [M] $@
-
-ifdef CONFIG_LTO_CLANG
- # don't compile IR until needed
- cmd_link_multi-m = $(cmd_link_multi-y)
-else
- cmd_link_multi-m = $(cmd_link_multi-link)
+ cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(filter %.o,$^)
endif
-
-$(multi-used-y): FORCE
- $(call if_changed,link_multi-y)
$(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-y), .o, -objs -y)
$(call multi_depend, $(multi-used-m), .o, -objs -y -m)
targets += $(multi-used-m)
@@ -629,12 +468,55 @@
$(call intermediate_targets, .lex.o, .lex.c) \
$(call intermediate_targets, .tab.o, .tab.c .tab.h)
+# Build
+# ---------------------------------------------------------------------------
+
+ifdef single-build
+
+KBUILD_SINGLE_TARGETS := $(filter $(obj)/%, $(KBUILD_SINGLE_TARGETS))
+
+curdir-single := $(sort $(foreach x, $(KBUILD_SINGLE_TARGETS), \
+ $(if $(filter $(x) $(basename $(x)).o, $(targets)), $(x))))
+
+# Handle single targets without any rule: show "Nothing to be done for ..." or
+# "No rule to make target ..." depending on whether the target exists.
+unknown-single := $(filter-out $(addsuffix /%, $(subdir-ym)), \
+ $(filter-out $(curdir-single), $(KBUILD_SINGLE_TARGETS)))
+
+single-subdirs := $(foreach d, $(subdir-ym), \
+ $(if $(filter $(d)/%, $(KBUILD_SINGLE_TARGETS)), $(d)))
+
+__build: $(curdir-single) $(single-subdirs)
+ifneq ($(unknown-single),)
+ $(Q)$(MAKE) -f /dev/null $(unknown-single)
+endif
+ @:
+
+ifeq ($(curdir-single),)
+# Nothing to do in this directory. Do not include any .*.cmd file for speed-up
+targets :=
+else
+targets += $(curdir-single)
+endif
+
+else
+
+__build: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \
+ $(if $(KBUILD_MODULES), $(targets-for-modules)) \
+ $(subdir-ym) $(always-y)
+ @:
+
+endif
+
# Descending
# ---------------------------------------------------------------------------
PHONY += $(subdir-ym)
$(subdir-ym):
- $(Q)$(MAKE) $(build)=$@ need-builtin=$(if $(findstring $@,$(subdir-obj-y)),1)
+ $(Q)$(MAKE) $(build)=$@ \
+ $(if $(filter $@/, $(KBUILD_SINGLE_TARGETS)),single-build=) \
+ need-builtin=$(if $(filter $@/built-in.a, $(subdir-builtin)),1) \
+ need-modorder=$(if $(filter $@/modules.order, $(subdir-modorder)),1)
# Add FORCE to the prequisites of a target to force it to be always rebuilt.
# ---------------------------------------------------------------------------
@@ -648,25 +530,17 @@
# 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)))
+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
-endif
-
-# Some files contained in $(targets) are intermediate artifacts.
-# We never want them to be removed automatically.
-.SECONDARY: $(targets)
.PHONY: $(PHONY)
--
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