Android.mk revision e742c1f5649d3298cd98d8cc8e62d0cd10be0e82
1LOCAL_PATH:= $(call my-dir) 2include $(CLEAR_VARS) 3 4LOCAL_SRC_FILES:= \ 5 arch/$(TARGET_ARCH)/begin.S \ 6 linker.c \ 7 linker_environ.c \ 8 linker_format.c \ 9 rt.c \ 10 dlfcn.c \ 11 debugger.c 12 13ifeq ($(TARGET_ARCH),sh) 14# SH-4A series virtual address range from 0x00000000 to 0x7FFFFFFF. 15LINKER_TEXT_BASE := 0x70000100 16else 17# This is aligned to 4K page boundary so that both GNU ld and gold work. Gold 18# actually produces a correct binary with starting address 0xB0000100 but the 19# extra objcopy step to rename symbols causes the resulting binary to be misaligned 20# and unloadable. Increasing the alignment adds an extra 3840 bytes in padding 21# but switching to gold saves about 1M of space. 22LINKER_TEXT_BASE := 0xB0001000 23endif 24 25# The maximum size set aside for the linker, from 26# LINKER_TEXT_BASE rounded down to a megabyte. 27LINKER_AREA_SIZE := 0x01000000 28 29LOCAL_LDFLAGS := -Wl,-Ttext,$(LINKER_TEXT_BASE) 30 31LOCAL_CFLAGS += -DPRELINK 32LOCAL_CFLAGS += -DLINKER_TEXT_BASE=$(LINKER_TEXT_BASE) 33LOCAL_CFLAGS += -DLINKER_AREA_SIZE=$(LINKER_AREA_SIZE) 34 35# Set LINKER_DEBUG to either 1 or 0 36# 37LOCAL_CFLAGS += -DLINKER_DEBUG=0 38 39# we need to access the Bionic private header <bionic_tls.h> 40# in the linker; duplicate the HAVE_ARM_TLS_REGISTER definition 41# from the libc build 42ifeq ($(TARGET_ARCH)-$(ARCH_ARM_HAVE_TLS_REGISTER),arm-true) 43 LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER 44endif 45LOCAL_CFLAGS += -I$(LOCAL_PATH)/../libc/private 46 47ifeq ($(TARGET_ARCH),arm) 48LOCAL_CFLAGS += -DANDROID_ARM_LINKER 49else 50 ifeq ($(TARGET_ARCH),x86) 51 LOCAL_CFLAGS += -DANDROID_X86_LINKER 52 endif 53endif 54 55LOCAL_MODULE:= linker 56 57LOCAL_STATIC_LIBRARIES := libc_nomalloc 58 59#LOCAL_FORCE_STATIC_EXECUTABLE := true # not necessary when not including BUILD_EXECUTABLE 60 61# 62# include $(BUILD_EXECUTABLE) 63# 64# Instead of including $(BUILD_EXECUTABLE), we execute the steps to create an executable by 65# hand, as we want to insert an extra step that is not supported by the build system, and 66# is probably specific the linker only, so there's no need to modify the build system for 67# the purpose. 68 69LOCAL_MODULE_CLASS := EXECUTABLES 70LOCAL_MODULE_SUFFIX := $(TARGET_EXECUTABLE_SUFFIX) 71 72# we don't want crtbegin.o (because we have begin.o), so unset it 73# just for this module 74LOCAL_NO_CRT := true 75 76include $(BUILD_SYSTEM)/dynamic_binary.mk 77 78$(linked_module): $(TARGET_CRTBEGIN_STATIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O) 79 $(transform-o-to-static-executable) 80 @echo "target PrefixSymbols: $(PRIVATE_MODULE) ($@)" 81 $(hide) $(TARGET_OBJCOPY) --prefix-symbols=__dl_ $@ 82 83# 84# end of BUILD_EXECUTABLE hack 85# 86