1779df224SSven Schnelle# SPDX-License-Identifier: GPL-2.0 2779df224SSven Schnelle# List of files in the vdso 3779df224SSven Schnelle 4779df224SSven SchnelleKCOV_INSTRUMENT := n 5779df224SSven Schnelle 6aff69273SFangrui Song# Include the generic Makefile to check the built vdso. 7779df224SSven Schnelleinclude $(srctree)/lib/vdso/Makefile 8779df224SSven Schnelleobj-vdso32 = vdso_user_wrapper-32.o note-32.o 9779df224SSven Schnelle 10779df224SSven Schnelle# Build rules 11779df224SSven Schnelle 12779df224SSven Schnelletargets := $(obj-vdso32) vdso32.so vdso32.so.dbg 13779df224SSven Schnelleobj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 14779df224SSven Schnelle 15779df224SSven SchnelleKBUILD_AFLAGS += -DBUILD_VDSO 16779df224SSven SchnelleKBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 17779df224SSven Schnelle 18779df224SSven SchnelleKBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) 19779df224SSven SchnelleKBUILD_AFLAGS_32 += -m31 -s 20779df224SSven Schnelle 21779df224SSven SchnelleKBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) 222028823fSHeiko CarstensKBUILD_CFLAGS_32 := $(filter-out -mpacked-stack,$(KBUILD_CFLAGS)) 23d15e4314SSumanth KorikkarKBUILD_CFLAGS_32 := $(filter-out -mno-pic-data-is-text-relative,$(KBUILD_CFLAGS_32)) 24a4228691SJens RemusKBUILD_CFLAGS_32 := $(filter-out -fno-asynchronous-unwind-tables,$(KBUILD_CFLAGS_32)) 25a4228691SJens RemusKBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin -fasynchronous-unwind-tables 26779df224SSven Schnelle 27d19c74e2SNathan ChancellorLDFLAGS_vdso32.so.dbg += -shared -soname=linux-vdso32.so.1 \ 28779df224SSven Schnelle --hash-style=both --build-id=sha1 -melf_s390 -T 29779df224SSven Schnelle 30779df224SSven Schnelle$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) 31779df224SSven Schnelle$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) 32779df224SSven Schnelle 33779df224SSven Schnelleobj-y += vdso32_wrapper.o 3498f7cd23SSven Schnelletargets += vdso32.lds 35779df224SSven SchnelleCPPFLAGS_vdso32.lds += -P -C -U$(ARCH) 36779df224SSven Schnelle 37779df224SSven Schnelle# Disable gcov profiling, ubsan and kasan for VDSO code 38779df224SSven SchnelleGCOV_PROFILE := n 39779df224SSven SchnelleUBSAN_SANITIZE := n 40779df224SSven SchnelleKASAN_SANITIZE := n 41e37b3dd0SIlya LeoshkevichKCSAN_SANITIZE := n 42779df224SSven Schnelle 43779df224SSven Schnelle# Force dependency (incbin is bad) 44779df224SSven Schnelle$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so 45779df224SSven Schnelle 460dd0bbc2SSven Schnellequiet_cmd_vdso_and_check = VDSO $@ 470dd0bbc2SSven Schnelle cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check) 480dd0bbc2SSven Schnelle 49779df224SSven Schnelle$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE 500dd0bbc2SSven Schnelle $(call if_changed,vdso_and_check) 51779df224SSven Schnelle 52779df224SSven Schnelle# strip rule for the .so file 53779df224SSven Schnelle$(obj)/%.so: OBJCOPYFLAGS := -S 54779df224SSven Schnelle$(obj)/%.so: $(obj)/%.so.dbg FORCE 55779df224SSven Schnelle $(call if_changed,objcopy) 56779df224SSven Schnelle 57779df224SSven Schnelle$(obj-vdso32): %-32.o: %.S FORCE 58779df224SSven Schnelle $(call if_changed_dep,vdso32as) 59779df224SSven Schnelle 60779df224SSven Schnelle# actual build commands 61779df224SSven Schnellequiet_cmd_vdso32as = VDSO32A $@ 62779df224SSven Schnelle cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $< 63779df224SSven Schnellequiet_cmd_vdso32cc = VDSO32C $@ 64779df224SSven Schnelle cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $< 65779df224SSven Schnelle 66779df224SSven Schnelle# Generate VDSO offsets using helper script 67779df224SSven Schnellegen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh 68779df224SSven Schnellequiet_cmd_vdsosym = VDSOSYM $@ 69779df224SSven Schnelle cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 70779df224SSven Schnelle 71779df224SSven Schnelleinclude/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE 72779df224SSven Schnelle $(call if_changed,vdsosym) 73