Allow invoking the linker on an executable.
The executable can be inside a zip file using the same syntax used for
shared objects: path.zip!/libentry.so.
The linker currently requires an absolute path. This restriction could be
loosened, but it didn't seem important? If it allowed non-absolute paths,
we'd need to decide how to handle:
- foo/bar (relative to CWD?)
- foo (search PATH / LD_LIBRARY_PATH, or also relative to CWD?)
- foo.zip!/bar (normalize_path() requires an absolute path)
The linker adjusts the argc/argv passed to main() and to constructor
functions to hide the initial linker argument, but doesn't adjust the auxv
vector or files like /proc/self/{exe,cmdline,auxv,stat}. Those files will
report that the kernel loaded the linker as an executable.
I think the linker_logger.cpp change guarding against (g_argv == NULL)
isn't actually necessary, but it seemed like a good idea given that I'm
delaying initialization of g_argv until after C++ constructors have run.
Bug: http://b/112050209
Test: bionic unit tests
Change-Id: I846faf98b16fd34218946f6167e8b451897debe5
diff --git a/tests/libs/Android.build.dlext_testzip.mk b/tests/libs/Android.build.dlext_testzip.mk
index 62ed4c7..19fd64b 100644
--- a/tests/libs/Android.build.dlext_testzip.mk
+++ b/tests/libs/Android.build.dlext_testzip.mk
@@ -32,7 +32,9 @@
my_shared_libs := \
$(call intermediates-dir-for,SHARED_LIBRARIES,libdlext_test_zip,,,$(bionic_2nd_arch_prefix))/libdlext_test_zip.so \
- $(call intermediates-dir-for,SHARED_LIBRARIES,libatest_simple_zip,,,$(bionic_2nd_arch_prefix))/libatest_simple_zip.so
+ $(call intermediates-dir-for,SHARED_LIBRARIES,libatest_simple_zip,,,$(bionic_2nd_arch_prefix))/libatest_simple_zip.so \
+ $(call intermediates-dir-for,NATIVE_TESTS,exec_linker_helper,,,$(bionic_2nd_arch_prefix))/exec_linker_helper \
+ $(call intermediates-dir-for,SHARED_LIBRARIES,exec_linker_helper_lib,,,$(bionic_2nd_arch_prefix))/exec_linker_helper_lib.so
$(LOCAL_BUILT_MODULE): PRIVATE_SHARED_LIBS := $(my_shared_libs)
$(LOCAL_BUILT_MODULE): $(my_shared_libs) $(BIONIC_TESTS_ZIPALIGN)