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Add stub for AOSP Binder and utility components

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The primary function of these stubs is to provide necessary interface definitions and that can be utilized by `binder_interceptor.cpp` during compilation (and runtime).

Crucially, `libTEESimulator.so` (which encapsulates these stubs) is dynamically loaded into the target process via `ptrace` after the system's official libraries, such as `/system/lib64/libbinder.so` and `/system/lib64/libutils.so`, have already been loaded and their symbols resolved by the dynamic linker.

Consequently, the dynamic linker will have already established bindings to the robust, canonical implementations within the system libraries for existing code paths. The dynamic linker does not automatically re-resolve or update these established symbol bindings when a new library with conflicting definitions is loaded later.

The AOSP files are downloaded via links:
1. https://android.googlesource.com/platform/frameworks/native/+/refs/heads/main/libs/binder/include/binder
2. https://android.googlesource.com/platform/system/core/+/refs/heads/main/libutils/binder/include/utils

The link for binder header in Android kernel is:
https://cs.android.com/android/kernel/superproject/+/common-android-mainline:common/include/uapi/linux/android/binder.h
This commit is contained in:
JingMatrix
2025-11-25 19:21:05 +01:00
parent 0c1937bd3e
commit 020a930a31
59 changed files with 12599 additions and 1 deletions
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app/src/main/cpp/CMakeLists.txt
+10 -1
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@@ -10,10 +10,19 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-exceptions")
OPTION(LSPLT_BUILD_SHARED OFF)
add_subdirectory(external/LSPlt/lsplt/src/main/jni)
add_compile_definitions(BINDER_DISABLE_NATIVE_HANDLE)
add_library(utils SHARED stub/stub_utils.cpp)
target_include_directories(utils PUBLIC external/AOSP/include)
add_library(binder SHARED stub/stub_binder.cpp)
target_include_directories(binder PUBLIC external/AOSP/include)
target_link_libraries(binder PRIVATE utils)
add_executable(libinject.so inject/main.cpp inject/utils.cpp)
target_include_directories(libinject.so PUBLIC include)
target_link_libraries(libinject.so PRIVATE lsplt_static)
add_library(${CMAKE_PROJECT_NAME} SHARED binder_interceptor.cpp)
target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE lsplt_static)
target_include_directories(${CMAKE_PROJECT_NAME} PUBLIC external/linux-kernel/include include)
target_link_libraries(${CMAKE_PROJECT_NAME} PRIVATE binder lsplt_static utils)