1 # List of files in the vdso, has to be asm only for now 2 3 obj-vdso32 = note.o sigtramp.o restart_syscall.o 4 5 # Build rules 6 7 targets := $(obj-vdso32) vdso32.so 8 obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) 9 10 ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls 11 # -march=1.1 -mschedule=7100LC 12 ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \ 13 $(call ld-option, -Wl$(comma)--hash-style=sysv) 14 asflags-y := -D__VDSO32__ -s 15 16 KBUILD_AFLAGS += -DBUILD_VDSO 17 KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING 18 19 VDSO_LIBGCC := $(shell $(CROSS32CC) -print-libgcc-file-name) 20 21 obj-y += vdso32_wrapper.o 22 extra-y += vdso32.lds 23 CPPFLAGS_vdso32.lds += -P -C # -U$(ARCH) 24 25 $(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE 26 27 # Force dependency (incbin is bad) 28 # link rule for the .so file, .lds has to be first 29 $(obj)/vdso32.so: $(src)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC) FORCE 30 $(call if_changed,vdso32ld) 31 32 # assembly rules for the .S files 33 $(obj-vdso32): %.o: %.S FORCE 34 $(call if_changed_dep,vdso32as) 35 36 $(obj-cvdso32): %.o: %.c FORCE 37 $(call if_changed_dep,vdso32cc) 38 39 # actual build commands 40 quiet_cmd_vdso32ld = VDSO32L $@ 41 cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $(filter-out FORCE, $^) -o $@ 42 quiet_cmd_vdso32as = VDSO32A $@ 43 cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $< 44 quiet_cmd_vdso32cc = VDSO32C $@ 45 cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -fPIC -mno-fast-indirect-calls -o $@ $< 46 47 # Generate VDSO offsets using helper script 48 gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh 49 quiet_cmd_vdsosym = VDSOSYM $@ 50 cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ 51 52 include/generated/vdso32-offsets.h: $(obj)/vdso32.so FORCE 53 $(call if_changed,vdsosym) 54