Use Dobby for native_api

LSPlt might not be capable for general native_api hooks

Fix Dobby module repo Url

chiteroman has deleted his repo, so I should maintain my own fork.

.gitmodules

@@ -1,9 +1,12 @@
 [submodule "external/lsplant"]
 	path = external/lsplant
 	url = https://github.com/JingMatrix/LSPlant.git
+[submodule "external/dobby"]
+	path = external/dobby
+	url = https://github.com/JingMatrix/Dobby.git
 [submodule "external/lsplt"]
 	path = external/lsplt
-	url = https://github.com/LSPosed/LSPlt
+	url = https://github.com/LSPosed/LSPlt.git
 [submodule "external/fmt"]
 	path = external/fmt
 	url = https://github.com/fmtlib/fmt.git

README.md

@@ -58,10 +58,10 @@ You can contribute translation [here](https://crowdin.com/project/lsposed_jingma
 - [Magisk](https://github.com/topjohnwu/Magisk/): makes all these possible
 - [Riru](https://github.com/RikkaApps/Riru): provides a way to inject code into zygote process
 - [XposedBridge](https://github.com/rovo89/XposedBridge): the OG Xposed framework APIs
-- [LSPlt](https://github.com/LSPosed/LSPlt): used for inline hooking
+- [LSPlt](https://github.com/LSPosed/LSPlt): used for (Android 15) `libart` inline hooking
+- [Dobby](https://github.com/JingMatrix/Dobby): used for fallback and `native_api` inline hooking
 - [LSPlant](https://github.com/JingMatrix/LSPlant): the core ART hooking framework
 - [EdXposed](https://github.com/ElderDrivers/EdXposed): fork source
-- ~[Dobby](https://github.com/chiteroman/Dobby): used for inline hooking~
 - ~[SandHook](https://github.com/ganyao114/SandHook/): ART hooking framework for SandHook variant~
 - ~[YAHFA](https://github.com/rk700/YAHFA): previous ART hooking framework~
 - ~[dexmaker](https://github.com/linkedin/dexmaker) and [dalvikdx](https://github.com/JakeWharton/dalvik-dx): to dynamically generate YAHFA hooker classes~

core/src/main/jni/CMakeLists.txt

@@ -12,5 +12,5 @@ add_library(${PROJECT_NAME} STATIC ${SRC_LIST})
 target_include_directories(${PROJECT_NAME} PUBLIC include)
 target_include_directories(${PROJECT_NAME} PRIVATE src)
 
-target_link_libraries(${PROJECT_NAME} PUBLIC lsplt_static lsplant_static log fmt-header-only)
+target_link_libraries(${PROJECT_NAME} PUBLIC dobby_static lsplt_static lsplant_static log fmt-header-only)
 target_link_libraries(${PROJECT_NAME} PRIVATE dex_builder_static)

core/src/main/jni/src/native_api.cpp

@@ -28,7 +28,6 @@
 #include <sys/mman.h>
 #include <list>
 #include <dlfcn.h>
-#include "native_util.h"
 #include "elf_util.h"
 
 
@@ -59,8 +58,8 @@ namespace lspd {
     const auto[entries] = []() {
         auto *entries = new(protected_page.get()) NativeAPIEntries{
                 .version = 2,
-                .hookFunc = &HookFunction,
+                .hookFunc = &DobbyHookFunction,
-                .unhookFunc = &UnhookFunction,
+                .unhookFunc = &DobbyUnhookFunction,
         };
 
         mprotect(protected_page.get(), 4096, PROT_READ);
@@ -72,7 +71,7 @@ namespace lspd {
             return InstallNativeAPI({
                 .inline_hooker = [](auto t, auto r) {
                     void* bk = nullptr;
-                    return HookFunction(t, r, &bk) == 0 ? bk : nullptr;
+                    return DobbyHookFunction(t, r, &bk) == 0 ? bk : nullptr;
                 },
             });
         }();

core/src/main/jni/src/native_api.h

@@ -26,8 +26,11 @@
 #define LSPOSED_NATIVE_API_H
 
 #include <cstdint>
+#include <dlfcn.h>
 #include <string>
+#include <dobby.h>
 
+#include "config.h"
 #include "utils/hook_helper.hpp"
 
 typedef int (*HookFunType)(void *func, void *replace, void **backup);
@@ -48,6 +51,28 @@ namespace lspd {
     bool InstallNativeAPI(const lsplant::HookHandler& handler);
 
     void RegisterNativeLib(const std::string &library_name);
+
+    inline int DobbyHookFunction(void *original, void *replace, void **backup) {
+        if constexpr (isDebug) {
+            Dl_info info;
+            if (dladdr(original, &info))
+            LOGD("Dobby hooking {} ({}) from {} ({})",
+                 info.dli_sname ? info.dli_sname : "(unknown symbol)", info.dli_saddr,
+                 info.dli_fname ? info.dli_fname : "(unknown file)", info.dli_fbase);
+        }
+        return DobbyHook(original, reinterpret_cast<dobby_dummy_func_t>(replace), reinterpret_cast<dobby_dummy_func_t *>(backup));
+    }
+
+    inline int DobbyUnhookFunction(void *original) {
+        if constexpr (isDebug) {
+            Dl_info info;
+            if (dladdr(original, &info))
+            LOGD("Dobby unhooking {} ({}) from {} ({})",
+                 info.dli_sname ? info.dli_sname : "(unknown symbol)", info.dli_saddr,
+                 info.dli_fname ? info.dli_fname : "(unknown file)", info.dli_fbase);
+        }
+        return DobbyDestroy(original);
+    }
 }
 
 #endif //LSPOSED_NATIVE_API_H

external/CMakeLists.txt

@@ -104,7 +104,8 @@ link_libraries(cxx)
 
 OPTION(LSPLANT_BUILD_SHARED OFF)
 OPTION(LSPLT_BUILD_SHARED OFF)
+add_subdirectory(dobby)
+add_subdirectory(fmt)
 add_subdirectory(lsplant/lsplant/src/main/jni)
 add_subdirectory(lsplt/lsplt/src/main/jni)
-add_subdirectory(fmt)
 target_compile_definitions(fmt-header-only INTERFACE FMT_STATIC_THOUSANDS_SEPARATOR=1 FMT_USE_FLOAT=0 FMT_USE_DOUBLE=0 FMT_USE_LONG_DOUBLE=0)

external/dobby

@@ -0,0 +1 @@
+Subproject commit 389938ae5e7f2fbc45fc62f94a20192a29d37435