OSCL-LXR

0001 # SPDX-License-Identifier: GPL-2.0
0002 # List of files in the vdso
0003
0004 KCOV_INSTRUMENT := n
0005 ARCH_REL_TYPE_ABS := R_390_COPY|R_390_GLOB_DAT|R_390_JMP_SLOT|R_390_RELATIVE
0006 ARCH_REL_TYPE_ABS += R_390_GOT|R_390_PLT
0007
0008 include $(srctree)/lib/vdso/Makefile
0009 obj-vdso32 = vdso_user_wrapper-32.o note-32.o
0010
0011 # Build rules
0012
0013 targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
0014 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
0015
0016 KBUILD_AFLAGS += -DBUILD_VDSO
0017 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
0018
0019 KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS))
0020 KBUILD_AFLAGS_32 += -m31 -s
0021
0022 KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS))
0023 KBUILD_CFLAGS_32 += -m31 -fPIC -shared -fno-common -fno-builtin
0024
0025 LDFLAGS_vdso32.so.dbg += -fPIC -shared -soname=linux-vdso32.so.1 \
0026         --hash-style=both --build-id=sha1 -melf_s390 -T
0027
0028 $(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32)
0029 $(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32)
0030
0031 obj-y += vdso32_wrapper.o
0032 targets += vdso32.lds
0033 CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
0034
0035 # Disable gcov profiling, ubsan and kasan for VDSO code
0036 GCOV_PROFILE := n
0037 UBSAN_SANITIZE := n
0038 KASAN_SANITIZE := n
0039 KCSAN_SANITIZE := n
0040
0041 # Force dependency (incbin is bad)
0042 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
0043
0044 $(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
0045         $(call if_changed,ld)
0046
0047 # strip rule for the .so file
0048 $(obj)/%.so: OBJCOPYFLAGS := -S
0049 $(obj)/%.so: $(obj)/%.so.dbg FORCE
0050         $(call if_changed,objcopy)
0051
0052 $(obj-vdso32): %-32.o: %.S FORCE
0053         $(call if_changed_dep,vdso32as)
0054
0055 # actual build commands
0056 quiet_cmd_vdso32as = VDSO32A $@
0057       cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
0058 quiet_cmd_vdso32cc = VDSO32C $@
0059       cmd_vdso32cc = $(CC) $(c_flags) -c -o $@ $<
0060
0061 # install commands for the unstripped file
0062 quiet_cmd_vdso_install = INSTALL $@
0063       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
0064
0065 vdso32.so: $(obj)/vdso32.so.dbg
0066         @mkdir -p $(MODLIB)/vdso
0067         $(call cmd,vdso_install)
0068
0069 vdso_install: vdso32.so
0070
0071 # Generate VDSO offsets using helper script
0072 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
0073 quiet_cmd_vdsosym = VDSOSYM $@
0074         cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
0075
0076 include/generated/vdso32-offsets.h: $(obj)/vdso32.so.dbg FORCE
0077         $(call if_changed,vdsosym)