1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 2e2c0cdfbSPalmer Dabbelt# Copied from arch/tile/kernel/vdso/Makefile 3e2c0cdfbSPalmer Dabbelt 4aff69273SFangrui Song# Include the generic Makefile to check the built vdso. 5127b0e05SThomas Weißschuhinclude $(srctree)/lib/vdso/Makefile.include 6e2c0cdfbSPalmer Dabbelt# Symbols present in the vdso 7e2c0cdfbSPalmer Dabbeltvdso-syms = rt_sigreturn 8d4c08b97SArnd Bergmannifdef CONFIG_64BIT 9ad5d1122SVincent Chenvdso-syms += vgettimeofday 10d4c08b97SArnd Bergmannendif 1128dfbe6eSAndrew Watermanvdso-syms += getcpu 12921ebd8fSAndrew Watermanvdso-syms += flush_icache 13aa5af0aaSEvan Greenvdso-syms += hwprobe 14aa5af0aaSEvan Greenvdso-syms += sys_hwprobe 15e2c0cdfbSPalmer Dabbelt 16*ee0d0305SXi Ruoyaoifdef CONFIG_VDSO_GETRANDOM 17*ee0d0305SXi Ruoyaovdso-syms += getrandom 18*ee0d0305SXi Ruoyaoendif 19*ee0d0305SXi Ruoyao 20e2c0cdfbSPalmer Dabbelt# Files to link into the vdso 210a9f2a61SAndreas Schwabobj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o 22e2c0cdfbSPalmer Dabbelt 23*ee0d0305SXi Ruoyaoifdef CONFIG_VDSO_GETRANDOM 24*ee0d0305SXi Ruoyaoobj-vdso += vgetrandom-chacha.o 25*ee0d0305SXi Ruoyaoendif 26*ee0d0305SXi Ruoyao 2740284a07STobias Klauserccflags-y := -fno-stack-protector 2874f6bb55SJisheng Zhangccflags-y += -DDISABLE_BRANCH_PROFILING 29bf40167dSAlexandre Ghiticcflags-y += -fno-builtin 3040284a07STobias Klauser 31ad5d1122SVincent Chenifneq ($(c-gettimeofday-y),) 32a0fc3b32SVincent Chen CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y) 33ad5d1122SVincent Chenendif 34ad5d1122SVincent Chen 35*ee0d0305SXi Ruoyaoifneq ($(c-getrandom-y),) 36*ee0d0305SXi Ruoyao CFLAGS_getrandom.o += -fPIC -include $(c-getrandom-y) 37*ee0d0305SXi Ruoyaoendif 38*ee0d0305SXi Ruoyao 39aa5af0aaSEvan GreenCFLAGS_hwprobe.o += -fPIC 40aa5af0aaSEvan Green 41e2c0cdfbSPalmer Dabbelt# Build rules 42fde9c59aSSaleem Abdulrasooltargets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds 43e2c0cdfbSPalmer Dabbeltobj-vdso := $(addprefix $(obj)/, $(obj-vdso)) 44e2c0cdfbSPalmer Dabbelt 45fde9c59aSSaleem Abdulrasoolobj-y += vdso.o 46e2c0cdfbSPalmer DabbeltCPPFLAGS_vdso.lds += -P -C -U$(ARCH) 47fcae44fdSNathan Chancellorifneq ($(filter vgettimeofday, $(vdso-syms)),) 48fcae44fdSNathan ChancellorCPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY 49fcae44fdSNathan Chancellorendif 50e2c0cdfbSPalmer Dabbelt 51e05d57dcSGuo Ren# Disable -pg to prevent insert call site 52d1584d79SSami TolvanenCFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) 53*ee0d0305SXi RuoyaoCFLAGS_REMOVE_getrandom.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) 54ad14f7caSVladimir IsaevCFLAGS_REMOVE_hwprobe.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) 55e05d57dcSGuo Ren 56e2c0cdfbSPalmer Dabbelt# Force dependency 57e2c0cdfbSPalmer Dabbelt$(obj)/vdso.o: $(obj)/vdso.so 58e2c0cdfbSPalmer Dabbelt 59e2c0cdfbSPalmer Dabbelt# link rule for the .so file, .lds has to be first 60772d7891SJisheng Zhang$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE 61c6898d66SAlexandre Ghiti $(call if_changed,vdsold_and_check) 627587a360SChangbin DuLDFLAGS_vdso.so.dbg = -shared -soname=linux-vdso.so.1 \ 632940954cSXi Ruoyao --build-id=sha1 --eh-frame-hdr 64e2c0cdfbSPalmer Dabbelt 65e2c0cdfbSPalmer Dabbelt# strip rule for the .so file 66e2c0cdfbSPalmer Dabbelt$(obj)/%.so: OBJCOPYFLAGS := -S 67e2c0cdfbSPalmer Dabbelt$(obj)/%.so: $(obj)/%.so.dbg FORCE 68e2c0cdfbSPalmer Dabbelt $(call if_changed,objcopy) 69e2c0cdfbSPalmer Dabbelt 70fde9c59aSSaleem Abdulrasool# Generate VDSO offsets using helper script 71b1992c37SMasahiro Yamadagen-vdsosym := $(src)/gen_vdso_offsets.sh 72fde9c59aSSaleem Abdulrasoolquiet_cmd_vdsosym = VDSOSYM $@ 73fde9c59aSSaleem Abdulrasool cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 74fde9c59aSSaleem Abdulrasool 75fde9c59aSSaleem Abdulrasoolinclude/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE 76fde9c59aSSaleem Abdulrasool $(call if_changed,vdsosym) 77fde9c59aSSaleem Abdulrasool 78e2c0cdfbSPalmer Dabbelt# actual build commands 79e2c0cdfbSPalmer Dabbelt# The DSO images are built using a special linker script 80e2c0cdfbSPalmer Dabbelt# Make sure only to export the intended __vdso_xxx symbol offsets. 81c6898d66SAlexandre Ghitiquiet_cmd_vdsold_and_check = VDSOLD $@ 82c6898d66SAlexandre Ghiti cmd_vdsold_and_check = $(LD) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \ 837f3d3490SNathan Chancellor $(OBJCOPY) $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \ 84c6898d66SAlexandre Ghiti rm $@.tmp && \ 85c6898d66SAlexandre Ghiti $(cmd_vdso_check) 86