1# SPDX-License-Identifier: GPL-2.0 2# List of files in the vdso 3 4# Include the generic Makefile to check the built vdso. 5include $(srctree)/lib/vdso/Makefile 6obj-vdso32 = vdso_user_wrapper-32.o note-32.o 7 8# Build rules 9 10targets := $(obj-vdso32) vdso32.so vdso32.so.dbg 11obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 12 13KBUILD_AFLAGS += -DBUILD_VDSO 14KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 15 16KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) 17KBUILD_AFLAGS_32 += -m31 -s 18 19KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) 20KBUILD_CFLAGS_32 := $(filter-out -mpacked-stack,$(KBUILD_CFLAGS)) 21KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32)) 22KBUILD_CFLAGS_32 := $(filter-out -fno-asynchronous-unwind-tables,$(KBUILD_CFLAGS_32)) 23KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin -fasynchronous-unwind-tables 24 25LDFLAGS_vdso32.so.dbg += -shared -soname=linux-vdso32.so.1 \ 26 --hash-style=both --build-id=sha1 -melf_s390 -T 27 28$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) 29$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) 30 31obj-y += vdso32_wrapper.o 32targets += vdso32.lds 33CPPFLAGS_vdso32.lds += -P -C -U$(ARCH) 34 35# Force dependency (incbin is bad) 36$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so 37 38quiet_cmd_vdso_and_check = VDSO $@ 39 cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check) 40 41$(obj)/vdso32.so.dbg: $(obj)/vdso32.lds $(obj-vdso32) FORCE 42 $(call if_changed,vdso_and_check) 43 44# strip rule for the .so file 45$(obj)/%.so: OBJCOPYFLAGS := -S 46$(obj)/%.so: $(obj)/%.so.dbg FORCE 47 $(call if_changed,objcopy) 48 49$(obj-vdso32): %-32.o: %.S FORCE 50 $(call if_changed_dep,vdso32as) 51 52# actual build commands 53quiet_cmd_vdso32as = VDSO32A $@ 54 cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< 55quiet_cmd_vdso32cc = VDSO32C $@ 56 cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $< 57 58# Generate VDSO offsets using helper script 59gen-vdsosym := $(src)/gen_vdso_offsets.sh 60quiet_cmd_vdsosym = VDSOSYM $@ 61 cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 62 63include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE 64 $(call if_changed,vdsosym) 65