| # SPDX-License-Identifier: GPL-2.0 |
| # List of files in the vdso |
| |
| KCOV_INSTRUMENT := n |
| |
| # Include the generic Makefile to check the built vdso. |
| include $(srctree)/lib/vdso/Makefile |
| obj-vdso32 = vdso_user_wrapper-32.o note-32.o |
| |
| # Build rules |
| |
| targets := $(obj-vdso32) vdso32.so vdso32.so.dbg |
| obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) |
| |
| KBUILD_AFLAGS += -DBUILD_VDSO |
| KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING |
| |
| KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) |
| KBUILD_AFLAGS_32 += -m31 -s |
| |
| KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) |
| KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32)) |
| KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin |
| |
| LDFLAGS_vdso32.so.dbg += -fPIC -shared -soname=linux-vdso32.so.1 \ |
| --hash-style=both --build-id=sha1 -melf_s390 -T |
| |
| $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) |
| $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) |
| |
| obj-y += vdso32_wrapper.o |
| targets += vdso32.lds |
| CPPFLAGS_vdso32.lds += -P -C -U$(ARCH) |
| |
| # Disable gcov profiling, ubsan and kasan for VDSO code |
| GCOV_PROFILE := n |
| UBSAN_SANITIZE := n |
| KASAN_SANITIZE := n |
| KCSAN_SANITIZE := n |
| |
| # Force dependency (incbin is bad) |
| $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so |
| |
| quiet_cmd_vdso_and_check = VDSO $@ |
| cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check) |
| |
| $(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE |
| $(call if_changed,vdso_and_check) |
| |
| # strip rule for the .so file |
| $(obj)/%.so: OBJCOPYFLAGS := -S |
| $(obj)/%.so: $(obj)/%.so.dbg FORCE |
| $(call if_changed,objcopy) |
| |
| $(obj-vdso32): %-32.o: %.S FORCE |
| $(call if_changed_dep,vdso32as) |
| |
| # actual build commands |
| quiet_cmd_vdso32as = VDSO32A $@ |
| cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< |
| quiet_cmd_vdso32cc = VDSO32C $@ |
| cmd_vdso32cc = $(CC) $(c_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/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE |
| $(call if_changed,vdsosym) |
