| # 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)/, $(obj-vdso64)) |
| |
| GCOV_PROFILE := n |
| KCOV_INSTRUMENT := n |
| UBSAN_SANITIZE := n |
| |
| ccflags-y := -shared -fno-common -fno-builtin -nostdlib \ |
| -Wl,-soname=linux-vdso64.so.1 -Wl,--hash-style=both |
| asflags-y := -D__VDSO64__ -s |
| |
| obj-y += vdso64_wrapper.o |
| extra-y += vdso64.lds |
| CPPFLAGS_vdso64.lds += -P -C -U$(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,$^) $(filter %.o,$^) $(call cc-ldoption, -Wl$(comma)--orphan-handling=warn) |
| |
| # 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 |
