2e85579c34
Changed it so that when the linker generates error messages, they are scribbled away into a buffer that dlfcn and friends can read from. Since the error messages are generetad with snprintf, and snprintf MAY call malloc during some code paths, we now link against a version of libc that does not contain malloc/free/realloc/calloc. We then define malloc and friends in the dynamic loader, and make them abort() if they are ever called. Signed-off-by: Dima Zavin <dima@android.com>
75 lines
2.1 KiB
Makefile
75 lines
2.1 KiB
Makefile
LOCAL_PATH:= $(call my-dir)
|
|
include $(CLEAR_VARS)
|
|
|
|
LOCAL_SRC_FILES:= \
|
|
arch/$(TARGET_ARCH)/begin.S \
|
|
linker.c \
|
|
rt.c \
|
|
dlfcn.c \
|
|
debugger.c \
|
|
ba.c
|
|
|
|
LINKER_TEXT_BASE := 0xB0000100
|
|
|
|
# The maximum size set aside for the linker, from
|
|
# LINKER_TEXT_BASE rounded down to a megabyte.
|
|
LINKER_AREA_SIZE := 0x01000000
|
|
|
|
LOCAL_LDFLAGS := -Wl,-Ttext,$(LINKER_TEXT_BASE)
|
|
|
|
LOCAL_CFLAGS += -DPRELINK
|
|
LOCAL_CFLAGS += -DLINKER_TEXT_BASE=$(LINKER_TEXT_BASE)
|
|
LOCAL_CFLAGS += -DLINKER_AREA_SIZE=$(LINKER_AREA_SIZE)
|
|
|
|
# we need to access the Bionic private header <bionic_tls.h>
|
|
# in the linker
|
|
LOCAL_CFLAGS += -I$(LOCAL_PATH)/../libc/private
|
|
|
|
ifeq ($(TARGET_ARCH),arm)
|
|
LOCAL_CFLAGS += -DANDROID_ARM_LINKER
|
|
else
|
|
ifeq ($(TARGET_ARCH),x86)
|
|
LOCAL_CFLAGS += -DANDROID_X86_LINKER
|
|
else
|
|
$(error Unsupported TARGET_ARCH $(TARGET_ARCH))
|
|
endif
|
|
endif
|
|
|
|
LOCAL_MODULE:= linker
|
|
|
|
LOCAL_STATIC_LIBRARIES := libcutils libc_nomalloc
|
|
|
|
#LOCAL_FORCE_STATIC_EXECUTABLE := true # not necessary when not including BUILD_EXECUTABLE
|
|
|
|
#
|
|
# include $(BUILD_EXECUTABLE)
|
|
#
|
|
# Instead of including $(BUILD_EXECUTABLE), we execute the steps to create an executable by
|
|
# hand, as we want to insert an extra step that is not supported by the build system, and
|
|
# is probably specific the linker only, so there's no need to modify the build system for
|
|
# the purpose.
|
|
|
|
LOCAL_MODULE_CLASS := EXECUTABLES
|
|
LOCAL_MODULE_SUFFIX := $(TARGET_EXECUTABLE_SUFFIX)
|
|
|
|
# Executables are not prelinked.
|
|
LOCAL_PRELINK_MODULE := false
|
|
|
|
include $(BUILD_SYSTEM)/dynamic_binary.mk
|
|
|
|
$(linked_module): $(TARGET_CRTBEGIN_STATIC_O) $(all_objects) $(all_libraries) $(TARGET_CRTEND_O)
|
|
$(transform-o-to-static-executable)
|
|
@echo "target PrefixSymbols: $(PRIVATE_MODULE) ($@)"
|
|
$(hide) $(TARGET_OBJCOPY) --prefix-symbols=__dl_ $@
|
|
|
|
#
|
|
# end of BUILD_EXECUTABLE hack
|
|
#
|
|
|
|
# we don't want crtbegin.o (because we have begin.o), so unset it
|
|
# just for this module
|
|
$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_STATIC_O :=
|
|
# This line is not strictly necessary because the dynamic linker is built
|
|
# as a static executable, but it won't hurt if in the future we start
|
|
# building the linker as a dynamic one.
|
|
$(LOCAL_BUILT_MODULE): TARGET_CRTBEGIN_DYNAMIC_O :=
|