| # SPDX-License-Identifier: GPL-2.0 | |
| # List of files in the vdso | |
| # 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 := $(filter-out -mpacked-stack,$(KBUILD_CFLAGS)) | |
| KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32)) | |
| KBUILD_CFLAGS_32 := $(filter-out -fno-asynchronous-unwind-tables,$(KBUILD_CFLAGS_32)) | |
| KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin -fasynchronous-unwind-tables | |
| LDFLAGS_vdso32.so.dbg += -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) | |
| # 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: $(obj)/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 := $(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) |