b9a4a0d02c
When using if_changed, we need to add FORCE as a dependency (see Documentation/kbuild/makefiles.txt) otherwise we don't get command line change checking amongst other things. This has resulted in vdsos not being rebuilt when switching between big and little endian. The vdso64/32ld commands have to be changed around to avoid pulling FORCE into the linker command line (code copied from x86). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
53 lines
1.4 KiB
Makefile
53 lines
1.4 KiB
Makefile
# List of files in the vdso, has to be asm only for now
|
|
|
|
obj-vdso64 = sigtramp.o gettimeofday.o datapage.o cacheflush.o note.o getcpu.o
|
|
|
|
# Build rules
|
|
|
|
targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
|
|
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
|
|
|
|
GCOV_PROFILE := n
|
|
UBSAN_SANITIZE := n
|
|
|
|
ccflags-y := -shared -fno-common -fno-builtin
|
|
ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
|
|
$(call cc-ldoption, -Wl$(comma)--hash-style=both)
|
|
asflags-y := -D__VDSO64__ -s
|
|
|
|
obj-y += vdso64_wrapper.o
|
|
extra-y += vdso64.lds
|
|
CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
|
|
|
|
# Force dependency (incbin is bad)
|
|
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
|
|
|
|
# link rule for the .so file, .lds has to be first
|
|
$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) FORCE
|
|
$(call if_changed,vdso64ld)
|
|
|
|
# strip rule for the .so file
|
|
$(obj)/%.so: OBJCOPYFLAGS := -S
|
|
$(obj)/%.so: $(obj)/%.so.dbg FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
# assembly rules for the .S files
|
|
$(obj-vdso64): %.o: %.S FORCE
|
|
$(call if_changed_dep,vdso64as)
|
|
|
|
# actual build commands
|
|
quiet_cmd_vdso64ld = VDSO64L $@
|
|
cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
|
|
quiet_cmd_vdso64as = VDSO64A $@
|
|
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
|
|
|
|
# install commands for the unstripped file
|
|
quiet_cmd_vdso_install = INSTALL $@
|
|
cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
|
|
|
|
vdso64.so: $(obj)/vdso64.so.dbg
|
|
@mkdir -p $(MODLIB)/vdso
|
|
$(call cmd,vdso_install)
|
|
|
|
vdso_install: vdso64.so
|