diff options
Diffstat (limited to 'arch/riscv/kernel/vdso/Makefile')
| -rw-r--r-- | arch/riscv/kernel/vdso/Makefile | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile index 9ebb5e590f93..a842dc034571 100644 --- a/arch/riscv/kernel/vdso/Makefile +++ b/arch/riscv/kernel/vdso/Makefile @@ -17,6 +17,15 @@ ifdef CONFIG_VDSO_GETRANDOM vdso-syms += getrandom endif +ifdef VDSO_CFI_BUILD +CFI_MARCH = _zicfilp_zicfiss +CFI_FULL = -fcf-protection=full +CFI_SUFFIX = -cfi +OFFSET_SUFFIX = _cfi +ccflags-y += -DVDSO_CFI=1 +asflags-y += -DVDSO_CFI=1 +endif + # Files to link into the vdso obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o @@ -27,6 +36,10 @@ endif ccflags-y := -fno-stack-protector ccflags-y += -DDISABLE_BRANCH_PROFILING ccflags-y += -fno-builtin +ccflags-y += $(KBUILD_BASE_ISA)$(CFI_MARCH) +ccflags-y += $(CFI_FULL) +asflags-y += $(KBUILD_BASE_ISA)$(CFI_MARCH) +asflags-y += $(CFI_FULL) ifneq ($(c-gettimeofday-y),) CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y) @@ -39,13 +52,20 @@ endif CFLAGS_hwprobe.o += -fPIC # Build rules -targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds +vdso_offsets := vdso$(if $(VDSO_CFI_BUILD),$(CFI_SUFFIX),)-offsets.h +vdso_o := vdso$(if $(VDSO_CFI_BUILD),$(CFI_SUFFIX),).o +vdso_so := vdso$(if $(VDSO_CFI_BUILD),$(CFI_SUFFIX),).so +vdso_so_dbg := vdso$(if $(VDSO_CFI_BUILD),$(CFI_SUFFIX),).so.dbg +vdso_lds := vdso.lds + +targets := $(obj-vdso) $(vdso_so) $(vdso_so_dbg) $(vdso_lds) + obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) -obj-y += vdso.o -CPPFLAGS_vdso.lds += -P -C -U$(ARCH) +obj-y += vdso$(if $(VDSO_CFI_BUILD),$(CFI_SUFFIX),).o +CPPFLAGS_$(vdso_lds) += -P -C -U$(ARCH) ifneq ($(filter vgettimeofday, $(vdso-syms)),) -CPPFLAGS_vdso.lds += -DHAS_VGETTIMEOFDAY +CPPFLAGS_$(vdso_lds) += -DHAS_VGETTIMEOFDAY endif # Disable -pg to prevent insert call site @@ -54,12 +74,12 @@ CFLAGS_REMOVE_getrandom.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) CFLAGS_REMOVE_hwprobe.o = $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) # Force dependency -$(obj)/vdso.o: $(obj)/vdso.so +$(obj)/$(vdso_o): $(obj)/$(vdso_so) # link rule for the .so file, .lds has to be first -$(obj)/vdso.so.dbg: $(obj)/vdso.lds $(obj-vdso) FORCE +$(obj)/$(vdso_so_dbg): $(obj)/$(vdso_lds) $(obj-vdso) FORCE $(call if_changed,vdsold_and_check) -LDFLAGS_vdso.so.dbg = -shared -soname=linux-vdso.so.1 \ +LDFLAGS_$(vdso_so_dbg) = -shared -soname=linux-vdso.so.1 \ --build-id=sha1 --eh-frame-hdr # strip rule for the .so file @@ -70,16 +90,16 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE # 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 > $@ + cmd_vdsosym = $(NM) $< | $(gen-vdsosym) $(OFFSET_SUFFIX) | LC_ALL=C sort > $@ -include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE +include/generated/$(vdso_offsets): $(obj)/$(vdso_so_dbg) FORCE $(call if_changed,vdsosym) # actual build commands # The DSO images are built using a special linker script # Make sure only to export the intended __vdso_xxx symbol offsets. quiet_cmd_vdsold_and_check = VDSOLD $@ - cmd_vdsold_and_check = $(LD) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \ + cmd_vdsold_and_check = $(LD) $(CFI_FULL) $(ld_flags) -T $(filter-out FORCE,$^) -o $@.tmp && \ $(OBJCOPY) $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ && \ rm $@.tmp && \ $(cmd_vdso_check) |