1df24e178SHelge Deller# List of files in the vdso, has to be asm only for now 2df24e178SHelge Deller 3df24e178SHelge Dellerobj-vdso64 = note.o sigtramp.o restart_syscall.o 4df24e178SHelge Deller 5df24e178SHelge Deller# Build rules 6df24e178SHelge Deller 7df24e178SHelge Dellertargets := $(obj-vdso64) vdso64.so 8df24e178SHelge Dellerobj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) 9df24e178SHelge Deller 10df24e178SHelge Deller 11df24e178SHelge Dellerccflags-y := -shared -fno-common -fno-builtin 12df24e178SHelge Dellerccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ 13df24e178SHelge Deller $(call ld-option, -Wl$(comma)--hash-style=sysv) 14df24e178SHelge Dellerasflags-y := -D__VDSO64__ -s 15df24e178SHelge Deller 16df24e178SHelge DellerKBUILD_AFLAGS += -DBUILD_VDSO 17df24e178SHelge DellerKBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 18df24e178SHelge Deller 19df24e178SHelge DellerVDSO_LIBGCC := $(shell $(CC) -print-libgcc-file-name) 20df24e178SHelge Deller 21df24e178SHelge Dellerobj-y += vdso64_wrapper.o 22df24e178SHelge Dellerextra-y += vdso64.lds 23df24e178SHelge DellerCPPFLAGS_vdso64.lds += -P -C -U$(ARCH) 24df24e178SHelge Deller 25df24e178SHelge Deller$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE 26df24e178SHelge Deller 27df24e178SHelge Deller# Force dependency (incbin is bad) 28df24e178SHelge Deller# link rule for the .so file, .lds has to be first 29*9086e601SHelge Deller$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC) FORCE 30df24e178SHelge Deller $(call if_changed,vdso64ld) 31df24e178SHelge Deller 32df24e178SHelge Deller# assembly rules for the .S files 33df24e178SHelge Deller$(obj-vdso64): %.o: %.S FORCE 34df24e178SHelge Deller $(call if_changed_dep,vdso64as) 35df24e178SHelge Deller 36df24e178SHelge Deller# actual build commands 37df24e178SHelge Dellerquiet_cmd_vdso64ld = VDSO64L $@ 38*9086e601SHelge Deller cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@ 39df24e178SHelge Dellerquiet_cmd_vdso64as = VDSO64A $@ 40df24e178SHelge Deller cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< 41df24e178SHelge Deller 42df24e178SHelge Deller# Generate VDSO offsets using helper script 43df24e178SHelge Dellergen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh 44df24e178SHelge Dellerquiet_cmd_vdsosym = VDSOSYM $@ 45df24e178SHelge Deller cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 46df24e178SHelge Deller 47df24e178SHelge Dellerinclude/generated/vdso64-offsets.h: $(obj)/vdso64.so FORCE 48df24e178SHelge Deller $(call if_changed,vdsosym) 49