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