| # List of files in the vdso, has to be asm only for now |
| |
| obj-vdso64 = note.o sigtramp.o restart_syscall.o |
| |
| # Build rules |
| |
| targets := $(obj-vdso64) vdso64.so |
| obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64)) |
| |
| |
| ccflags-y := -shared -fno-common -fno-builtin |
| ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \ |
| $(call ld-option, -Wl$(comma)--hash-style=sysv) |
| asflags-y := -D__VDSO64__ -s |
| |
| KBUILD_AFLAGS += -DBUILD_VDSO |
| KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING |
| |
| VDSO_LIBGCC := $(shell $(CC) -print-libgcc-file-name) |
| |
| obj-y += vdso64_wrapper.o |
| extra-y += vdso64.lds |
| CPPFLAGS_vdso64.lds += -P -C -U$(ARCH) |
| |
| $(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE |
| |
| # Force dependency (incbin is bad) |
| # link rule for the .so file, .lds has to be first |
| $(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC) FORCE |
| $(call if_changed,vdso64ld) |
| |
| # 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) -Wl,-T $(filter-out FORCE, $^) -o $@ |
| quiet_cmd_vdso64as = VDSO64A $@ |
| cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $< |
| |
| # Generate VDSO offsets using helper script |
| gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh |
| quiet_cmd_vdsosym = VDSOSYM $@ |
| cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ |
| |
| include/generated/vdso64-offsets.h: $(obj)/vdso64.so FORCE |
| $(call if_changed,vdsosym) |
