| # List of files in the vdso, has to be asm only for now | |
| obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o | |
| # Build rules | |
| targets := $(obj-vdso64) vdso64.so vdso64.so.dbg | |
| obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) | |
| KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS)) | |
| KBUILD_AFLAGS_64 += -m64 -s | |
| KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS)) | |
| KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin | |
| KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ | |
| $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) | |
| $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64) | |
| $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64) | |
| obj-y += vdso64_wrapper.o | |
| extra-y += vdso64.lds | |
| CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) | |
| # Disable gcov profiling for VDSO code | |
| GCOV_PROFILE := n | |
| # 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) | |
| $(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 | |
| $(call if_changed_dep,vdso64as) | |
| # actual build commands | |
| quiet_cmd_vdso64ld = VDSO64L $@ | |
| cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -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 |