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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [XEN PATCH v3 17/23] xen/build: Start using if_changed
This patch start to use if_changed introduced in a previous commit.
Whenever if_changed is called, the target must have FORCE as
dependency so that if_changed can check if the command line to be
run as changed, so the macro $(real-prereqs) must be use to
discover the dependencies without "FORCE".
Whenever a target isn't in obj-y, it should be added to extra-y so the
.*.cmd dependency file associated with the target can be loaded. This
is done for xsm/flask/ and both common/lib{elf,fdt}/ and
arch/x86/Makefile.
For the targets that generates .*.d dependency files, there's going to
be two dependency files (.*.d and .*.cmd) until we can merge them
together in a later patch via fixdep from Linux.
One cleanup, libelf-relocate.o doesn't exist anymore.
We import cmd_ld and cmd_objcopy from Linux v5.4.
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
xen/Rules.mk | 68 +++++++++++++++++++++++++++-----------
xen/arch/arm/Makefile | 4 +--
xen/arch/x86/Makefile | 1 +
xen/arch/x86/efi/Makefile | 7 ++--
xen/common/libelf/Makefile | 12 ++++---
xen/common/libfdt/Makefile | 9 +++--
xen/xsm/flask/Makefile | 17 +++++++---
7 files changed, 84 insertions(+), 34 deletions(-)
diff --git a/xen/Rules.mk b/xen/Rules.mk
index 8807a2e21c94..bb4ced5f0dd4 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -52,6 +52,18 @@ SPECIAL_DATA_SECTIONS := rodata $(foreach a,1 2 4 8 16, \
include Makefile
+# Linking
+# ---------------------------------------------------------------------------
+
+quiet_cmd_ld = LD $@
+cmd_ld = $(LD) $(XEN_LDFLAGS) -r -o $@ $(real-prereqs)
+
+# Objcopy
+# ---------------------------------------------------------------------------
+
+quiet_cmd_objcopy = OBJCOPY $@
+cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $< $@
+
define gendep
ifneq ($(1),$(subst /,:,$(1)))
DEPS += $(dir $(1)).$(notdir $(1)).d
@@ -161,29 +173,47 @@ else
$(CC) $(c_flags) -c $< -o $@
endif
-%.o: %.S Makefile
- $(CC) $(a_flags) -c $< -o $@
+quiet_cmd_cc_o_S = CC $@
+cmd_cc_o_S = $(CC) $(a_flags) -c $< -o $@
+
+%.o: %.S FORCE
+ $(call if_changed,cc_o_S)
+
+
+quiet_cmd_obj_init_o = INIT_O $@
+define cmd_obj_init_o
+ $(OBJDUMP) -h $< | sed -n '/[0-9]/{s,00*,0,g;p;}' | while read idx name sz
rest; do \
+ case "$$name" in \
+ .*.local) ;; \
+ .text|.text.*|.data|.data.*|.bss) \
+ test $$sz != 0 || continue; \
+ echo "Error: size of $<:$$name is 0x$$sz" >&2; \
+ exit $$(expr $$idx + 1);; \
+ esac; \
+ done; \
+ $(OBJCOPY) $(foreach s,$(SPECIAL_DATA_SECTIONS),--rename-section
.$(s)=.init.$(s)) $< $@
+endef
+
+$(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): %.init.o: %.o FORCE
+ $(call if_changed,obj_init_o)
+
+quiet_cmd_cpp_i_c = CPP $@
+cmd_cpp_i_c = $(CPP) $(filter-out -Wa$(comma)%,$(c_flags)) $< -o $@
+
+quiet_cmd_cc_s_c = CC $@
+cmd_cc_s_c = $(CC) $(filter-out -Wa$(comma)%,$(c_flags)) -S $< -o $@
-$(filter %.init.o,$(obj-y) $(obj-bin-y) $(extra-y)): %.init.o: %.o Makefile
- $(OBJDUMP) -h $< | sed -n '/[0-9]/{s,00*,0,g;p;}' | while read idx name
sz rest; do \
- case "$$name" in \
- .*.local) ;; \
- .text|.text.*|.data|.data.*|.bss) \
- test $$sz != 0 || continue; \
- echo "Error: size of $<:$$name is 0x$$sz" >&2; \
- exit $$(expr $$idx + 1);; \
- esac; \
- done
- $(OBJCOPY) $(foreach s,$(SPECIAL_DATA_SECTIONS),--rename-section
.$(s)=.init.$(s)) $< $@
+quiet_cmd_s_S = CPP $@
+cmd_s_S = $(CPP) $(filter-out -Wa$(comma)%,$(a_flags)) $< -o $@
-%.i: %.c Makefile
- $(CPP) $(filter-out -Wa$(comma)%,$(c_flags)) $< -o $@
+%.i: %.c FORCE
+ $(call if_changed,cpp_i_c)
-%.s: %.c Makefile
- $(CC) $(filter-out -Wa$(comma)%,$(c_flags)) -S $< -o $@
+%.s: %.c FORCE
+ $(call if_changed,cc_s_c)
-%.s: %.S Makefile
- $(CPP) $(filter-out -Wa$(comma)%,$(a_flags)) $< -o $@
+%.s: %.S FORCE
+ $(call if_changed,cpp_s_S)
# Add intermediate targets:
# When building objects with specific suffix patterns, add intermediate
diff --git a/xen/arch/arm/Makefile b/xen/arch/arm/Makefile
index 1599e2ba4058..37ca6d25c08e 100644
--- a/xen/arch/arm/Makefile
+++ b/xen/arch/arm/Makefile
@@ -98,8 +98,8 @@ prelink_lto.o: $(ALL_OBJS)
prelink.o: $(patsubst %/built_in.o,%/built_in_bin.o,$(ALL_OBJS)) prelink_lto.o
$(LD) $(XEN_LDFLAGS) -r -o $@ $^
else
-prelink.o: $(ALL_OBJS)
- $(LD) $(XEN_LDFLAGS) -r -o $@ $^
+prelink.o: $(ALL_OBJS) FORCE
+ $(call if_changed,ld)
endif
$(TARGET)-syms: prelink.o xen.lds
diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index 5de873cf693e..6fb6cafdf47b 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -74,6 +74,7 @@ obj-$(CONFIG_TBOOT) += tboot.o
obj-y += hpet.o
obj-y += vm_event.o
obj-y += xstate.o
+extra-y += asm-macros.i
x86_emulate.o: x86_emulate/x86_emulate.c x86_emulate/x86_emulate.h
diff --git a/xen/arch/x86/efi/Makefile b/xen/arch/x86/efi/Makefile
index 490d791aae2d..3e4c395b7535 100644
--- a/xen/arch/x86/efi/Makefile
+++ b/xen/arch/x86/efi/Makefile
@@ -1,7 +1,10 @@
CFLAGS-y += -fshort-wchar
-%.o: %.ihex
- $(OBJCOPY) -I ihex -O binary $< $@
+quiet_cmd_objcopy_o_ihex = OBJCOPY $@
+cmd_objcopy_o_ihex = $(OBJCOPY) -I ihex -O binary $< $@
+
+%.o: %.ihex FORCE
+ $(call if_changed,objcopy_o_ihex)
boot.init.o: buildid.o
diff --git a/xen/common/libelf/Makefile b/xen/common/libelf/Makefile
index 464c448d9d37..a92326c982e9 100644
--- a/xen/common/libelf/Makefile
+++ b/xen/common/libelf/Makefile
@@ -1,12 +1,16 @@
obj-bin-y := libelf.o
nocov-y += libelf.o
+libelf-objs := libelf-tools.o libelf-loader.o libelf-dominfo.o
SECTIONS := text data $(SPECIAL_DATA_SECTIONS)
+OBJCOPYFLAGS := $(foreach s,$(SECTIONS),--rename-section .$(s)=.init.$(s))
CFLAGS-y += -Wno-pointer-sign
-libelf.o: libelf-temp.o Makefile
- $(OBJCOPY) $(foreach s,$(SECTIONS),--rename-section .$(s)=.init.$(s))
$< $@
+libelf.o: libelf-temp.o FORCE
+ $(call if_changed,objcopy)
-libelf-temp.o: libelf-tools.o libelf-loader.o libelf-dominfo.o
#libelf-relocate.o
- $(LD) $(XEN_LDFLAGS) -r -o $@ $^
+libelf-temp.o: $(libelf-objs) FORCE
+ $(call if_changed,ld)
+
+extra-y += libelf-temp.o $(libelf-objs)
diff --git a/xen/common/libfdt/Makefile b/xen/common/libfdt/Makefile
index e2a5e59380a0..3efa5c5f8ed3 100644
--- a/xen/common/libfdt/Makefile
+++ b/xen/common/libfdt/Makefile
@@ -1,14 +1,17 @@
include Makefile.libfdt
SECTIONS := text data $(SPECIAL_DATA_SECTIONS)
+OBJCOPYFLAGS := $(foreach s,$(SECTIONS),--rename-section .$(s)=.init.$(s))
obj-y += libfdt.o
nocov-y += libfdt.o
CFLAGS-y += -I$(BASEDIR)/include/xen/libfdt/
-libfdt.o: libfdt-temp.o Makefile
- $(OBJCOPY) $(foreach s,$(SECTIONS),--rename-section .$(s)=.init.$(s))
$< $@
+libfdt.o: libfdt-temp.o FORCE
+ $(call if_changed,objcopy)
libfdt-temp.o: $(LIBFDT_OBJS)
- $(LD) $(XEN_LDFLAGS) -r -o $@ $^
+ $(call if_changed,ld)
+
+extra-y += libfdt-temp.o $(LIBFDT_OBJS)
diff --git a/xen/xsm/flask/Makefile b/xen/xsm/flask/Makefile
index 011ef5ca91f8..789e8fa1e3f9 100644
--- a/xen/xsm/flask/Makefile
+++ b/xen/xsm/flask/Makefile
@@ -20,12 +20,21 @@ AV_H_FILES = include/av_perm_to_string.h
include/av_permissions.h
ALL_H_FILES = $(FLASK_H_FILES) $(AV_H_FILES)
$(obj-y) ss/built_in.o: $(ALL_H_FILES)
+extra-y += $(ALL_H_FILES)
-$(FLASK_H_FILES): $(FLASK_H_DEPEND)
- $(CONFIG_SHELL) policy/mkflask.sh $(AWK) include $(FLASK_H_DEPEND)
+mkflask := policy/mkflask.sh
+quiet_cmd_mkflash = MKFLASH $@
+cmd_mkflash = $(CONFIG_SHELL) $(mkflask) $(AWK) include $(real-prereqs)
-$(AV_H_FILES): $(AV_H_DEPEND)
- $(CONFIG_SHELL) policy/mkaccess_vector.sh $(AWK) $(AV_H_DEPEND)
+$(FLASK_H_FILES): $(FLASK_H_DEPEND) $(mkflash) FORCE
+ $(call if_changed,mkflash)
+
+mkaccess_vector := policy/mkaccess_vector.sh
+quiet_cmd_mkaccess_vector = MKACCESS VECTOR $@
+cmd_mkaccess_vector = $(CONFIG_SHELL) $(mkaccess_vector) $(AWK) $(real-prereqs)
+
+$(AV_H_FILES): $(AV_H_DEPEND) $(mkaccess_vector) FORCE
+ $(call if_changed,mkaccess_vector)
obj-bin-$(CONFIG_XSM_FLASK_POLICY) += flask-policy.o
flask-policy.o: policy.bin
--
Anthony PERARD
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