49 lines
1.4 KiB
Makefile
49 lines
1.4 KiB
Makefile
# List of files in the vdso, has to be asm only for now
|
|
|
|
obj-vdso64 = note.o sigtramp.o restart_syscall.o
|
|
|
|
# Build rules
|
|
|
|
targets := $(obj-vdso64) vdso64.so
|
|
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
|
|
|
|
|
|
ccflags-y := -shared -fno-common -fno-builtin
|
|
ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
|
|
$(call ld-option, -Wl$(comma)--hash-style=sysv)
|
|
asflags-y := -D__VDSO64__ -s
|
|
|
|
KBUILD_AFLAGS += -DBUILD_VDSO
|
|
KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
|
|
|
|
VDSO_LIBGCC := $(shell $(CC) -print-libgcc-file-name)
|
|
|
|
obj-y += vdso64_wrapper.o
|
|
extra-y += vdso64.lds
|
|
CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
|
|
|
|
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE
|
|
|
|
# Force dependency (incbin is bad)
|
|
# link rule for the .so file, .lds has to be first
|
|
$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC)
|
|
$(call if_changed,vdso64ld)
|
|
|
|
# assembly rules for the .S files
|
|
$(obj-vdso64): %.o: %.S FORCE
|
|
$(call if_changed_dep,vdso64as)
|
|
|
|
# actual build commands
|
|
quiet_cmd_vdso64ld = VDSO64L $@
|
|
cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
|
|
quiet_cmd_vdso64as = VDSO64A $@
|
|
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
|
|
|
|
# Generate VDSO offsets using helper script
|
|
gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
|
|
quiet_cmd_vdsosym = VDSOSYM $@
|
|
cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
|
|
|
|
include/generated/vdso64-offsets.h: $(obj)/vdso64.so FORCE
|
|
$(call if_changed,vdsosym)
|