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. 5 include $(srctree)/lib/vdso/Makefile 6 obj-vdso32 = vdso_user_wrapper-32.o note-32.o 7 8 # Build rules 9 10 targets := $(obj-vdso32) vdso32.so vdso32.so.dbg 11 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 12 13 KBUILD_AFLAGS += -DBUILD_VDSO 14 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 15 16 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) 17 KBUILD_AFLAGS_32 += -m31 -s 18 19 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) 20 KBUILD_CFLAGS_32 := $(filter-out -mpacked-stack,$(KBUILD_CFLAGS)) 21 KBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32)) 22 KBUILD_CFLAGS_32 := $(filter-out -fno-asynchronous-unwind-tables,$(KBUILD_CFLAGS_32)) 23 KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin -fasynchronous-unwind-tables 24 25 LDFLAGS_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 = $(KBUILD_AFLAGS_32) 30 31 obj-y += vdso32_wrapper.o 32 targets += vdso32.lds 33 CPPFLAGS_vdso32.lds += -P -C -U$(ARCH) 34 35 # Force dependency (incbin is bad) 36 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so 37 38 quiet_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 53 quiet_cmd_vdso32as = VDSO32A $@ 54 cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< 55 quiet_cmd_vdso32cc = VDSO32C $@ 56 cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $< 57 58 # Generate VDSO offsets using helper script 59 gen-vdsosym := $(src)/gen_vdso_offsets.sh 60 quiet_cmd_vdsosym = VDSOSYM $@ 61 cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 62 63 include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE 64 $(call if_changed,vdsosym)
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