Android.mk revision be5755969d70668bbab0e0c0ed75ebd867189723
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 ba.c 13 14ifeq ($(TARGET_ARCH),sh) 15# SH-4A series virtual address range from 0x00000000 to 0x7FFFFFFF. 16LINKER_TEXT_BASE := 0x70000100 17else 18# This is aligned to 4K page boundary so that both GNU ld and gold work. Gold 19# actually produces a correct binary with starting address 0xB0000100 but the 20# extra objcopy step to rename symbols causes the resulting binary to be misaligned 21# and unloadable. Increasing the alignment adds an extra 3840 bytes in padding 22# but switching to gold saves about 1M of space. 23LINKER_TEXT_BASE := 0xB0001000 24endif 25 26# The maximum size set aside for the linker, from 27# LINKER_TEXT_BASE rounded down to a megabyte. 28LINKER_AREA_SIZE := 0x01000000 29 30LOCAL_LDFLAGS := -Wl,-Ttext,$(LINKER_TEXT_BASE) 31 32LOCAL_CFLAGS += -DPRELINK 33LOCAL_CFLAGS += -DLINKER_TEXT_BASE=$(LINKER_TEXT_BASE) 34LOCAL_CFLAGS += -DLINKER_AREA_SIZE=$(LINKER_AREA_SIZE) 35 36# Set LINKER_DEBUG to either 1 or 0 37# 38LOCAL_CFLAGS += -DLINKER_DEBUG=0 39 40# we need to access the Bionic private header <bionic_tls.h> 41# in the linker; duplicate the HAVE_ARM_TLS_REGISTER definition 42# from the libc build 43ifeq ($(TARGET_ARCH)-$(ARCH_ARM_HAVE_TLS_REGISTER),arm-true) 44 LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER 45endif 46LOCAL_CFLAGS += -I$(LOCAL_PATH)/../libc/private 47 48ifeq ($(TARGET_ARCH),arm) 49LOCAL_CFLAGS += -DANDROID_ARM_LINKER 50else 51 ifeq ($(TARGET_ARCH),x86) 52 LOCAL_CFLAGS += -DANDROID_X86_LINKER 53 else 54 ifeq ($(TARGET_ARCH),sh) 55 LOCAL_CFLAGS += -DANDROID_SH_LINKER 56 else 57 $(error Unsupported TARGET_ARCH $(TARGET_ARCH)) 58 endif 59 endif 60endif 61 62LOCAL_MODULE:= linker 63 64LOCAL_STATIC_LIBRARIES := libc_nomalloc 65 66#LOCAL_FORCE_STATIC_EXECUTABLE := true # not necessary when not including BUILD_EXECUTABLE 67 68# 69# include $(BUILD_EXECUTABLE) 70# 71# Instead of including $(BUILD_EXECUTABLE), we execute the steps to create an executable by 72# hand, as we want to insert an extra step that is not supported by the build system, and 73# is probably specific the linker only, so there's no need to modify the build system for 74# the purpose. 75 76LOCAL_MODULE_CLASS := EXECUTABLES 77LOCAL_MODULE_SUFFIX := $(TARGET_EXECUTABLE_SUFFIX) 78 79# Executables are not prelinked. 80LOCAL_PRELINK_MODULE := false 81 82include $(BUILD_SYSTEM)/dynamic_binary.mk 83 84$(linked_module): $(TARGET_CRTBEGIN_STATIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O) 85 $(transform-o-to-static-executable) 86 @echo "target PrefixSymbols: $(PRIVATE_MODULE) ($@)" 87 $(hide) $(TARGET_OBJCOPY) --prefix-symbols=__dl_ $@ 88 89# 90# end of BUILD_EXECUTABLE hack 91# 92 93# we don't want crtbegin.o (because we have begin.o), so unset it 94# just for this module 95$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_STATIC_O := 96# This line is not strictly necessary because the dynamic linker is built 97# as a static executable, but it won't hurt if in the future we start 98# building the linker as a dynamic one. 99$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_DYNAMIC_O := 100