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platform_bionic/linker/Android.mk

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auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= \
arch/$(TARGET_ARCH)/begin.S \
More dynamic linker cleanup. I still want to break linker_format out into its own library so we can reuse it for malloc debugging and so forth. (There are many similar pieces of code in bionic, but the linker's one seems to be the most complete/functional.) Change-Id: If3721853d28937c8e821ca1d23cf200e228a409a
2012-10-30 01:37:13 +01:00
debugger.cpp \
Fix dlerror(3). Add unit tests for dlerror(3) in various situations. I think We're at least as good as glibc now. Also factor out the ScopedPthreadMutexLock and use it here too. Bug: http://code.google.com/p/android/issues/detail?id=38398 Change-Id: I040938b4366ab836e3df46d1d8055b92f4ea6ed8
2012-10-12 01:08:51 +02:00
dlfcn.cpp \
Clean up the linker a bit, remove prelinking support. Also make the errors more readable, since none of us seemed to know what they actually meant. The new style is still as verbose as the old, but that's probably necessary in the absence of chained exceptions in C. Here's what you'd see if you try to boot after removing libsurfaceflinger.so: 32267 32267 E AndroidRuntime: java.lang.UnsatisfiedLinkError: Cannot load library: (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsystem_server.so" needed by "libandroid_servers.so"; caused by (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsurfaceflinger.so" needed by "libsystem_server.so"; caused by (linker.c:709, pid 32259) load_library: library "libsurfaceflinger.so" not found This patch also fixes almost all of the compiler warnings. Change-Id: I64bb59aed6d4e039c15ea45be2367f319ef879f8
2012-08-04 01:49:39 +02:00
linker.cpp \
More dynamic linker cleanup. I still want to break linker_format out into its own library so we can reuse it for malloc debugging and so forth. (There are many similar pieces of code in bionic, but the linker's one seems to be the most complete/functional.) Change-Id: If3721853d28937c8e821ca1d23cf200e228a409a
2012-10-30 01:37:13 +01:00
linker_environ.cpp \
linker_format.cpp \
linker_phdr.cpp \
rt.cpp
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
Make the linker relocatable. Previously, the linker always loaded itself into the same location in memory, which inhibited the effectiveness of Android's ASLR implementation. Modify the linker code so it can be relocatable and link itself at runtime. Change-Id: Ia80273d7a00ff648b4da545f4b69debee6343968
2011-11-12 00:53:17 +01:00
LOCAL_LDFLAGS := -shared
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
linker: enable -fvisibility=hidden Compile the linker with -fvisibility=hidden. This reduces the number of symbols that show up in the .dynsym section of the linker. These symbols are never exported to other applications. In particular, this fixes a problem with setting -DLINKER_DEBUG=1 introduced in 468319ce4f3f7383d788b76c09cda2a405311f36. Because the symbols "debug_verbosity" and "format_log" have not been resolved before the linker links itself, any attempt to call PRINT / INFO / TRACE / WARN / ERROR will result in a segfault. This change allows the static linker to produce a relative reference to these symbols rather than relying on relocation. This also has a nice side effect of making the linker slightly smaller and slightly more optimized. The following symbols no longer in the .dynsym section of the linker after this change: -addr_to_name -call_constructors_recursi -calloc -debugger_init -debugger_signal_handler -debug_verbosity -dladdr -dlclose -dlerror -dl_lock -dlopen -dlsym -dl_unwind_find_exidx -find_containing_library -find_containing_symbol -find_library -format_buffer -free -libdl_info -linker_env_get -linker_env_init -linker_env_secure -linker_env_unset -linker_get_error -__linker_init -lookup -lookup_in_library -malloc -notify_gdb_of_libraries -notify_gdb_of_load -notify_gdb_of_unload -realloc -rtld_db_dlactivity -unload_library -vsnprintf Bug: 5827809 Change-Id: I5e8cd7dcf48c1d6831a970a67f63f24916c5e437
2012-04-04 19:18:27 +02:00
LOCAL_CFLAGS += -fno-stack-protector \
-Wstrict-overflow=5 \
Use std=gnu99 for the dynamic linker as well as libc. Change-Id: I76dd78576c5af6eb6282555f069647b6260edc31
2012-07-16 18:43:14 +02:00
-fvisibility=hidden \
MIPS support to the linker Change-Id: I37ec2d6c51d82bb9e9dbfef4b38c85366bead255 Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Raghu Gandham <raghu@mips.com> Signed-off-by: Bhanu Chetlapalli <bhanu@mips.com>
2012-07-31 21:07:22 +02:00
-Wall -Wextra
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
Clean up the linker a bit, remove prelinking support. Also make the errors more readable, since none of us seemed to know what they actually meant. The new style is still as verbose as the old, but that's probably necessary in the absence of chained exceptions in C. Here's what you'd see if you try to boot after removing libsurfaceflinger.so: 32267 32267 E AndroidRuntime: java.lang.UnsatisfiedLinkError: Cannot load library: (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsystem_server.so" needed by "libandroid_servers.so"; caused by (linker.c:1629, pid 32259) soinfo_link_image: could not load library "libsurfaceflinger.so" needed by "libsystem_server.so"; caused by (linker.c:709, pid 32259) load_library: library "libsurfaceflinger.so" not found This patch also fixes almost all of the compiler warnings. Change-Id: I64bb59aed6d4e039c15ea45be2367f319ef879f8
2012-08-04 01:49:39 +02:00
# We need to access Bionic private headers in the linker...
LOCAL_CFLAGS += -I$(LOCAL_PATH)/../libc/
# ...one of which is <private/bionic_tls.h>, for which we
# need HAVE_ARM_TLS_REGISTER.
Use correct TLS codepath for linker Replicate ARM libc build's HAVE_ARM_TLS_REGISTER preprocessor definition logic, to ensure that the runtime linker uses the correct codepath for accessing the TLS address
2009-09-30 01:12:31 +02:00
ifeq ($(TARGET_ARCH)-$(ARCH_ARM_HAVE_TLS_REGISTER),arm-true)
LOCAL_CFLAGS += -DHAVE_ARM_TLS_REGISTER
endif
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
ifeq ($(TARGET_ARCH),arm)
MIPS support to the linker Change-Id: I37ec2d6c51d82bb9e9dbfef4b38c85366bead255 Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Raghu Gandham <raghu@mips.com> Signed-off-by: Bhanu Chetlapalli <bhanu@mips.com>
2012-07-31 21:07:22 +02:00
LOCAL_CFLAGS += -DANDROID_ARM_LINKER
endif
ifeq ($(TARGET_ARCH),x86)
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
LOCAL_CFLAGS += -DANDROID_X86_LINKER
MIPS support to the linker Change-Id: I37ec2d6c51d82bb9e9dbfef4b38c85366bead255 Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Raghu Gandham <raghu@mips.com> Signed-off-by: Bhanu Chetlapalli <bhanu@mips.com>
2012-07-31 21:07:22 +02:00
endif
ifeq ($(TARGET_ARCH),mips)
LOCAL_CFLAGS += -DANDROID_MIPS_LINKER
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
endif
LOCAL_MODULE:= linker
Add dependencies on all the makefiles. This should help prevent broken builds next time I'm messing with assembler/compiler/linker flags... Change-Id: I30f15a3ce3c3f3c60cad7bc59aaba9f42d792224
2012-08-13 23:06:05 +02:00
LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
linker: remove libcutils dependency by re-implementing simpler socket_local_client. Change-Id: I87f29fd59454d713b9ddfb13e6cf114822f52efd
2010-06-11 03:29:33 +02:00
LOCAL_STATIC_LIBRARIES := libc_nomalloc
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
#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)
linker: set LOCAL_NO_CRT := true Use LOCAL_NO_CRT to prevent linking against crtbegin.o, rather than messing with build rules. This also prevents linking against crtend.o, which isn't needed for the linker. Change-Id: I0c5b9999be7e8676560fe145c1c033ffce8db4d1
2011-11-04 18:11:26 +01:00
# we don't want crtbegin.o (because we have begin.o), so unset it
# just for this module
LOCAL_NO_CRT := true
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
include $(BUILD_SYSTEM)/dynamic_binary.mk
Set up the private variables. Now we use private variables in transform-o-to-executable to support build executables against the NDK. Bug: 7170098 Change-Id: I6e505b33001b76f4b11fcbbb1d35392c4ddf4c70
2012-09-26 03:32:24 +02:00
# See build/core/executable.mk
$(linked_module): PRIVATE_TARGET_GLOBAL_LD_DIRS := $(TARGET_GLOBAL_LD_DIRS)
$(linked_module): PRIVATE_TARGET_GLOBAL_LDFLAGS := $(TARGET_GLOBAL_LDFLAGS)
$(linked_module): PRIVATE_TARGET_FDO_LIB := $(TARGET_FDO_LIB)
$(linked_module): PRIVATE_TARGET_LIBGCC := $(TARGET_LIBGCC)
$(linked_module): PRIVATE_TARGET_CRTBEGIN_DYNAMIC_O := $(TARGET_CRTBEGIN_DYNAMIC_O)
$(linked_module): PRIVATE_TARGET_CRTBEGIN_STATIC_O := $(TARGET_CRTBEGIN_STATIC_O)
$(linked_module): PRIVATE_TARGET_CRTEND_O := $(TARGET_CRTEND_O)
auto import from //depot/cupcake/@135843
2009-03-04 04:28:35 +01:00
$(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
#
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