1LOCAL_PATH:= $(call my-dir) 2include $(CLEAR_VARS) 3 4LOCAL_SRC_FILES:= \ 5 arch/$(TARGET_ARCH)/begin.S \ 6 linker.c \ 7 rt.c \ 8 dlfcn.c \ 9 debugger.c \ 10 ba.c 11 12LINKER_TEXT_BASE := 0xB0000100 13 14# The maximum size set aside for the linker, from 15# LINKER_TEXT_BASE rounded down to a megabyte. 16LINKER_AREA_SIZE := 0x01000000 17 18LOCAL_LDFLAGS := -Wl,-Ttext,$(LINKER_TEXT_BASE) 19 20LOCAL_CFLAGS += -DPRELINK 21LOCAL_CFLAGS += -DLINKER_TEXT_BASE=$(LINKER_TEXT_BASE) 22LOCAL_CFLAGS += -DLINKER_AREA_SIZE=$(LINKER_AREA_SIZE) 23 24# we need to access the Bionic private header <bionic_tls.h> 25# in the linker 26LOCAL_CFLAGS += -I$(LOCAL_PATH)/../libc/private 27 28ifeq ($(TARGET_ARCH),arm) 29LOCAL_CFLAGS += -DANDROID_ARM_LINKER 30else 31 ifeq ($(TARGET_ARCH),x86) 32 LOCAL_CFLAGS += -DANDROID_X86_LINKER 33 else 34 $(error Unsupported TARGET_ARCH $(TARGET_ARCH)) 35 endif 36endif 37 38LOCAL_MODULE:= linker 39 40LOCAL_STATIC_LIBRARIES := libcutils libc_nomalloc 41 42#LOCAL_FORCE_STATIC_EXECUTABLE := true # not necessary when not including BUILD_EXECUTABLE 43 44# 45# include $(BUILD_EXECUTABLE) 46# 47# Instead of including $(BUILD_EXECUTABLE), we execute the steps to create an executable by 48# hand, as we want to insert an extra step that is not supported by the build system, and 49# is probably specific the linker only, so there's no need to modify the build system for 50# the purpose. 51 52LOCAL_MODULE_CLASS := EXECUTABLES 53LOCAL_MODULE_SUFFIX := $(TARGET_EXECUTABLE_SUFFIX) 54 55# Executables are not prelinked. 56LOCAL_PRELINK_MODULE := false 57 58include $(BUILD_SYSTEM)/dynamic_binary.mk 59 60$(linked_module): $(TARGET_CRTBEGIN_STATIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O) 61 $(transform-o-to-static-executable) 62 @echo "target PrefixSymbols: $(PRIVATE_MODULE) ($@)" 63 $(hide) $(TARGET_OBJCOPY) --prefix-symbols=__dl_ $@ 64 65# 66# end of BUILD_EXECUTABLE hack 67# 68 69# we don't want crtbegin.o (because we have begin.o), so unset it 70# just for this module 71$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_STATIC_O := 72# This line is not strictly necessary because the dynamic linker is built 73# as a static executable, but it won't hurt if in the future we start 74# building the linker as a dynamic one. 75$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_DYNAMIC_O := 76