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- # Include the generic Makefile to check the built vdso.
- include $(srctree)/lib/vdso/Makefile
- KCOV_INSTRUMENT := n
- # Disable gcov profiling, ubsan and kasan for VDSO code
- GCOV_PROFILE := n
- UBSAN_SANITIZE := n
- KASAN_SANITIZE := n
- KCSAN_SANITIZE := n
- obj-vdso32 = note.o sigtramp.o restart_syscall.o
- obj-cvdso32 = vdso32_generic.o
- # Build rules
- targets := $(obj-vdso32) $(obj-cvdso32) vdso32.so
- obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
- obj-cvdso32 := $(addprefix $(obj)/, $(obj-cvdso32))
- VDSO_CFLAGS_REMOVE := -pg $(CC_FLAGS_FTRACE)
- CFLAGS_REMOVE_vdso32_generic.o = $(VDSO_CFLAGS_REMOVE)
- ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls
- # -march=1.1 -mschedule=7100LC
- ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
- $(call ld-option, -Wl$(comma)--hash-style=sysv)
- asflags-y := -D__VDSO32__ -s
- KBUILD_AFLAGS += -DBUILD_VDSO
- KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
- VDSO_LIBGCC := $(shell $(CROSS32CC) -print-libgcc-file-name)
- obj-y += vdso32_wrapper.o
- extra-y += vdso32.lds
- CPPFLAGS_vdso32.lds += -P -C # -U$(ARCH)
- $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE
- # Force dependency (incbin is bad)
- # link rule for the .so file, .lds has to be first
- $(obj)/vdso32.so: $(obj)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE
- $(call if_changed,vdso32ld)
- # assembly rules for the .S files
- $(obj-vdso32): %.o: %.S FORCE
- $(call if_changed_dep,vdso32as)
- $(obj-cvdso32): %.o: %.c FORCE
- $(call if_changed_dep,vdso32cc)
- # actual build commands
- quiet_cmd_vdso32ld = VDSO32L $@
- cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@
- quiet_cmd_vdso32as = VDSO32A $@
- cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
- quiet_cmd_vdso32cc = VDSO32C $@
- cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -o $@ $<
- # 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 > $@
- include/generated/vdso32-offsets.h: $(obj)/vdso32.so FORCE
- $(call if_changed,vdsosym)
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