| # SPDX-License-Identifier: GPL-2.0 | |
| # 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) | |
| # actual build commands | |
| quiet_cmd_vdso64ld = VDSO64L $@ | |
| cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) | |
| # 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 |