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@oro-oro 2015-08-19T10:39:22.000000Z 字数 13916 阅读 6259

三、JNI_Onload之RegisterNatives

IDAForAndroid

通过实例来了解本地函数注册原理，以及如何分析加密后的本地函数对应关系。

1. 例子1

在hello-jni项目，Java_com_example_hellojni_HelloJni_stringFromJNI这种函数名太麻烦了，所以，有必要重新注册一下本地函数。

stringFromJNI注册为fun1，fun注册为fun2。

  1. #include <string.h>
  2. #include <jni.h>
  3. #include <android/log.h>
  5. #define TAG "NATIVE DEBUG LOG"  
  6. #define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, TAG, __VA_ARGS__)
  7. #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG , TAG, __VA_ARGS__)
  8. #define LOGI(...) __android_log_print(ANDROID_LOG_INFO , TAG, __VA_ARGS__)
  9. #define LOGW(...) __android_log_print(ANDROID_LOG_WARN , TAG, __VA_ARGS__)
  10. #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR , TAG, __VA_ARGS__)
  12. jstring stringFromJNI( JNIEnv* env, jobject thiz )
  13. {
  14. #if defined(__arm__)
  15.   #if defined(__ARM_ARCH_7A__)
  16.     #if defined(__ARM_NEON__)
  17.       #if defined(__ARM_PCS_VFP)
  18.         #define ABI "armeabi-v7a/NEON (hard-float)"
  19.       #else
  20.         #define ABI "armeabi-v7a/NEON"
  21.       #endif
  22.     #else
  23.       #if defined(__ARM_PCS_VFP)
  24.         #define ABI "armeabi-v7a (hard-float)"
  25.       #else
  26.         #define ABI "armeabi-v7a"
  27.       #endif
  28.     #endif
  29.   #else
  30.    #define ABI "armeabi"
  31.   #endif
  32. #elif defined(__i386__)
  33.    #define ABI "x86"
  34. #elif defined(__x86_64__)
  35.    #define ABI "x86_64"
  36. #elif defined(__mips64)  /* mips64el-* toolchain defines __mips__ too */
  37.    #define ABI "mips64"
  38. #elif defined(__mips__)
  39.    #define ABI "mips"
  40. #elif defined(__aarch64__)
  41.    #define ABI "arm64-v8a"
  42. #else
  43.    #define ABI "unknown"
  44. #endif
  46.     return (*env)->NewStringUTF(env, "Hello from JNI !  Compiled with ABI " ABI ".");
  47. }
  49.  void fun(JNIEnv* env,jobject thiz){  
  50.     LOGI("Hello JNI!");
  51. }  
  53. JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* pVm, void* reserved)
  54. {
  55.     JNIEnv* env;
  56.     if ((*pVm)->GetEnv(pVm, (void **)&env, JNI_VERSION_1_6)) {
  57.          return -1;
  58.     }
  59.     JNINativeMethod nm[2];
  60.     nm[0].name = "fun1";
  61.     nm[0].signature = "()Ljava/lang/String;";
  62.     nm[0].fnPtr = stringFromJNI;
  63.     nm[1].name = "fun2";
  64.     nm[1].signature = "()V";
  65.     nm[1].fnPtr = fun;
  66.     jclass cls = (*env)->FindClass(env, "com/example/hellojni/HelloJni");
  67.     // Register methods with env->RegisterNatives.
  68.     (*env)->RegisterNatives(env, cls, nm, 2);
  70.     return JNI_VERSION_1_6;
  71. }
  1. LOCAL_PATH := $(call my-dir)
  3. include $(CLEAR_VARS)
  5. LOCAL_MODULE    := hello-jni
  6. LOCAL_SRC_FILES := hello-jni.c
  8. LOCAL_LDLIBS += -L$(SYSROOT)/usr/lib -llog
  10. include $(BUILD_SHARED_LIBRARY)
  1. APP_ABI := armeabi

编译:

  1. $ ndk-build
  2. [armeabi] Gdbserver      : [arm-linux-androideabi-4.8] libs/armeabi/gdbserver
  3. [armeabi] Gdbsetup       : libs/armeabi/gdb.setup
  4. [armeabi] Compile thumb  : hello-jni <= hello-jni.c
  5. [armeabi] SharedLibrary  : libhello-jni.so
  6. [armeabi] Install        : libhello-jni.so => libs/armeabi/libhello-jni.so

显示完JNI函数，直接看F5伪代码。函数的对应关系还是比较清晰的。

  1. signed int __fastcall JNI_OnLoad(int a1)
  2. {
  3.   signed int v1; // r3@2
  4.   int v3; // [sp+8h] [bp-2Ch]@1
  5.   int v4; // [sp+Ch] [bp-28h]@3
  6.   int v5; // [sp+10h] [bp-24h]@3
  7.   int v6; // [sp+14h] [bp-20h]@3
  8.   int (__fastcall *v7)(int); // [sp+18h] [bp-1Ch]@3
  9.   int v8; // [sp+1Ch] [bp-18h]@3
  10.   char v9[4]; // [sp+20h] [bp-14h]@3
  11.   int (*v10)(); // [sp+24h] [bp-10h]@3
  13.   if ( (*(int (__cdecl **)(int, int *))(*(_DWORD *)a1 + offsetof(JNINativeInterface, FindClass)))(a1, &v3) )
  14.   {
  15.     v1 = -1;
  16.   }
  17.   else
  18.   {
  19.     v5 = (int)"fun1";
  20.     v6 = (int)"()Ljava/lang/String;";
  21.     v7 = stringFromJNI;
  22.     v8 = (int)"fun2";
  23.     *(_DWORD *)v9 = "()V";
  24.     v10 = fun;
  25.     v4 = (*(int (__fastcall **)(int, _DWORD))(*(_DWORD *)v3 + offsetof(JNINativeInterface, FindClass)))(
  26.            v3,
  27.            "com/example/hellojni/HelloJni");
  28.     (*(void (__fastcall **)(int, int, int *, signed int))(*(_DWORD *)v3 + offsetof(JNINativeInterface, RegisterNatives)))(
  29.       v3,
  30.       v4,
  31.       &v5,
  32.       2);
  33.     v1 = 65542;
  34.   }
  35.   return v1;
  36. }
  1. int __fastcall stringFromJNI(int a1)
  2. {
  3.   return (*(int (__cdecl **)(int, _DWORD))(*(_DWORD *)a1 + offsetof(JNINativeInterface, NewStringUTF)))(
  4.            a1,
  5.            "Hello from JNI !  Compiled with ABI armeabi.");
  6. }
  1. int fun()
  2. {
  3.   return _android_log_print(4, "NATIVE DEBUG LOG", "Hello JNI!");
  4. }

2. 例子2

《Android 软件安全与逆向分析》9.6.2的例子。
http://yunpan.cn/cdRWxKaf9nJuL 访问密码 0939

除了常见的B指令外，LDR PC, #Address也是一种常见的函数调用指令。

  1. .text:00001374                 LDR     R3, [R3]
  2. .text:00001378                 MOV     LR, PC
  3. .text:0000137C                 LDR     PC, [R3,#JNINativeInterface.FindClass] ; 函数调用
  4. .text:00001380                 LDR     R2, =(native_class_ptr - 0x1394)
  5. .text:00001384                 LDR     R3, [R5]
  6. .text:00001388                 MOV     R1, R0
  7. .text:0000138C                 LDR     R2, [PC,R2] ; native_class
  8. .text:00001390                 STR     R0, [R2]
  9. .text:00001394                 LDR     R2, =(__data_start - 0x13A8)
  10. .text:00001398                 MOV     R0, R3
  11. .text:0000139C                 LDR     R12, [R3]
  12. .text:000013A0                 ADD     R2, PC, R2 ; __data_start
  13. .text:000013A4                 MOV     R3, #3
  14. .text:000013A8                 MOV     LR, PC
  15. .text:000013AC                 LDR     PC, [R12,#JNINativeInterface.RegisterNatives] ; 函数调用
  16. .text:000013B0                 CMP     R0, #0
  17. .text:000013B4                 BNE     loc_13D8
  18. .text:000013B8                 LDR     R2, =(aRegisternative - 0x13CC)

JNI_OnLoad的伪代码：

  1. signed int __fastcall JNI_OnLoad(int a1)
  2. {
  3.   signed int result; // r0@2
  5.   if ( (*(int (**)(void))(*(_DWORD *)a1 + 24))() )
  6.   {
  7.     result = -1;
  8.   }
  9.   else
  10.   {
  11.     _android_log_print(2, "com.droider.ndkapp", "JNI_OnLoad()");
  12.     native_class = (*(int (__fastcall **)(_DWORD *, _DWORD))(*g_env + offsetof(JNINativeInterface, FindClass)))(
  13.                      g_env,
  14.                      "com/droider/ndkapp/MyApp");
  15.     if ( (*(int (__fastcall **)(_DWORD *, _DWORD, _DWORD, signed int))(*g_env
  16.                                                                      + offsetof(JNINativeInterface, RegisterNatives)))(
  17.            g_env,
  18.            native_class,
  19.            _data_start,
  20.            3) )
  21.     {
  22.       _android_log_print(6, "com.droider.ndkapp", "RegisterNatives() --> nativeMethod() failed");
  23.       result = -1;
  24.     }
  25.     else
  26.     {
  27.       _android_log_print(2, "com.droider.ndkapp", "RegisterNatives() --> nativeMethod() ok");
  28.       result = 65542;
  29.     }
  30.   }
  31.   return result;
  32. }

RegisterNatives函数注册的是一个函数数组，_data_start就是保存函数的数组。

单击进去，看看_data_start，便可以找到函数的对应关系了。

  1. .data:00004EA4 ; Segment type: Pure data
  2. .data:00004EA4                 AREA .data, DATA
  3. .data:00004EA4                 ; ORG 0x4EA4
  4. .data:00004EA4                 EXPORT __data_start
  5. .data:00004EA4 __data_start    DCD aInitsn             ; DATA XREF: JNI_OnLoad+8Co
  6. .data:00004EA4                                         ; .text:off_1408o
  8. .data:00004EA4                                         ; "initSN"
  9. .data:00004EA8                 DCD aV                  ; "()V"
  10. .data:00004EAC                 DCD n1
  12. .data:00004EB0                 DCD aSavesn             ; "saveSN"
  13. .data:00004EB4                 DCD aLjavaLangStrin     ; "(Ljava/lang/String;)V"
  14. .data:00004EB8                 DCD n2
  16. .data:00004EBC                 DCD aWork               ; "work"
  17. .data:00004EC0                 DCD aV                  ; "()V"
  18. .data:00004EC4                 DCD n3

3. 例子3

有时候这个数组可能是加密过的，这就需要去解密这个数组了。
例子：http://yunpan.cn/cdMsjyYeKbdRj 访问密码 cabb

这里主要是分析，该样本的函数对应关系。

jniExport 类下面有这些native函数：

  1.     public native void nq10(String arg1, String arg2, int arg3) {
  2.     }
  4.     public native void nq11(String arg1, int arg2) {
  5.     }
  7.     public native void nq12(Context arg1, ClassLoader arg2, int arg3) {
  8.     }
  10.     public native void nq13(String arg1, int arg2) {
  11.     }
  13.     public native void nq14(String arg1, int arg2) {
  14.     }

用IDA打开nqshield.so，却没有发现对应的函数，直接看JNI_OnLoad函数。

  1. signed int __fastcall JNI_OnLoad(int a1)
  2. {
  3.   int v1; // r4@1
  4.   int v2; // r3@1
  5.   int v3; // r4@2
  6.   int v4; // r0@2
  7.   int v5; // r1@2
  8.   signed int result; // r0@4
  9.   int v7; // [sp+4h] [bp-Ch]@1
  11.   v1 = a1;
  12.   sub_2438();
  13.   v2 = *(_DWORD *)v1;
  14.   v7 = 0;
  15.   if ( (*(int (__fastcall **)(int, int *, signed int))(v2 + offsetof(JNINativeInterface, FindClass)))(v1, &v7, 65540)
  16.     || (v3 = v7,
  17.         v4 = dcf13197d7a5901a5ad213f34001fe4(79),
  18.         (v5 = (*(int (__fastcall **)(int, int))(*(_DWORD *)v3 + offsetof(JNINativeInterface, FindClass)))(v3, v4)) == 0) )
  19.   {
  20.     result = -1;
  21.   }
  22.   else if ( (*(int (__fastcall **)(int, int, int *, signed int))(*(_DWORD *)v3
  23.                                                                + offsetof(JNINativeInterface, RegisterNatives)))(
  24.               v3,
  25.               v5,
  26.               &dword_D004,      // 这里就是注册的函数素组。
  27.               5) < 0 )
  28.   {
  29.     result = -1;
  30.   }
  31.   else
  32.   {
  33.     result = 65540;
  34.   }
  35.   return result;
  36. }

点击dword_D004，跳到对应的数组地址：

  1. .data:0000D004 00 00 00 00             dword_D004      DCD 0                   ; DATA XREF: JNI_OnLoad+74o
  2. .data:0000D004                                                                 ; .text:off_64BCo ...
  3. .data:0000D008 00 00 00 00             dword_D008      DCD 0                   ; DATA XREF: sub_64C0+20w
  4. .data:0000D00C 4C 22 00 00                             DCD b9df1ce797fd03603fd7137afff2957
  5. .data:0000D010 00 00 00 00             dword_D010      DCD 0                   ; DATA XREF: sub_64C0+2Cw
  6. .data:0000D014 00 00 00 00             dword_D014      DCD 0                   ; DATA XREF: sub_64C0+38w
  7. .data:0000D018 78 23 00 00                             DCD eb5993d402df42eac47e82555b7ae31
  8. .data:0000D01C 00 00 00 00             dword_D01C      DCD 0                   ; DATA XREF: sub_64C0+44w
  9. .data:0000D020 00 00 00 00             dword_D020      DCD 0                   ; DATA XREF: sub_64C0+50w
  10. .data:0000D024 6C 61 00 00                             DCD fa3f3a501e8754e88bed48c128ef90
  11. .data:0000D028 00 00 00 00             dword_D028      DCD 0                   ; DATA XREF: sub_64C0+5Cw
  12. .data:0000D02C 00 00 00 00             dword_D02C      DCD 0                   ; DATA XREF: sub_64C0+68w
  13. .data:0000D030 48 5D 00 00                             DCD abc020d3ee6fbc05ab1ed6b4da7252d
  14. .data:0000D034 00 00 00 00             dword_D034      DCD 0                   ; DATA XREF: sub_64C0+74w
  15. .data:0000D038 00 00 00 00             dword_D038      DCD 0                   ; DATA XREF: sub_64C0+80w
  16. .data:0000D03C 10 58 00 00                             DCD e300588cc034bcbaa7d61

以上有5组函数关系：

函数名 参数 本地方法
dword_D004 dword_D008 b9df1ce797fd03603fd7137afff2957
dword_D010 dword_D014 eb5993d402df42eac47e82555b7ae31
dword_D01C dword_D020 fa3f3a501e8754e88bed48c128ef90
dword_D028 dword_D02C abc020d3ee6fbc05ab1ed6b4da7252d
dword_D034 dword_D038 e300588cc034bcbaa7d61

dword_****，这些都是字符串来的，这些东西在哪里初始化的呢？
因为这个在JNI_OnLoad函数就要使用了，那么这些字符串，肯定在该函数之前初始化的。
譬如，.init_array。

按快捷键Shift+F7或者View->Open Subview->Segments，可以打开段视图。

Segments

点击进去：

  1. .init_array:0000CD24                         ; Segment type: Pure data
  2. .init_array:0000CD24                                         AREA .init_array, DATA
  3. .init_array:0000CD24                                         ; ORG 0xCD24
  4. .init_array:0000CD24 C0 64 00 00                             DCD sub_64C0
  5. .init_array:0000CD28 29 8C 00 00                             DCD sub_8C28+1
  6. .init_array:0000CD2C 00 00 00 00                             ALIGN 0x10
  7. .init_array:0000CD2C                         ; .init_array   ends

不过，本人直接按快捷键x，调出dword_D004的交叉引用窗口，看它是在哪里初始化的。
交叉引用

选中w，数据写入的地址，进去，可以找到初始化的代码：

  1. int sub_64C0()
  2. {
  3.   int result; // r0@1
  5.   dword_D004 = dcf13197d7a5901a5ad213f34001fe4(110);
  6.   dword_D008 = dcf13197d7a5901a5ad213f34001fe4(115);
  7.   dword_D010 = dcf13197d7a5901a5ad213f34001fe4(111);
  8.   dword_D014 = dcf13197d7a5901a5ad213f34001fe4(116);
  9.   dword_D01C = dcf13197d7a5901a5ad213f34001fe4(112);
  10.   dword_D020 = dcf13197d7a5901a5ad213f34001fe4(117);
  11.   dword_D028 = dcf13197d7a5901a5ad213f34001fe4(113);
  12.   dword_D02C = dcf13197d7a5901a5ad213f34001fe4(118);
  13.   dword_D034 = dcf13197d7a5901a5ad213f34001fe4(114);
  14.   result = dcf13197d7a5901a5ad213f34001fe4(119);
  15.   dword_D038 = result;
  16.   return result;
  17. }

解密函数找到了，剩下就是解密问题了。
接下来直接调用dcf13197d7a5901a5ad213f34001fe4方法进行解密即可。

点击函数，去看看它的原型：

  1. int __fastcall dcf13197d7a5901a5ad213f34001fe4(int result)

快捷键Tab，切反汇编视图，查看该函数名：

  1. .text:00002A18
  2. .text:00002A18 ; dcf13197d7a5901a5ad213f34001fe4(myString)
  3. .text:00002A18                 EXPORT _Z31dcf13197d7a5901a5ad213f34001fe48myString
  4. .text:00002A18 _Z31dcf13197d7a5901a5ad213f34001fe48myString
  5. .text:00002A18                                         ; CODE XREF: e78be2435917208c8fa0c2af796f6c38(_JNIEnv *,_jobject *,_jobject *,_jobject *)+1Cp
  6. .text:00002A18                                         ; e78be2435917208c8fa0c2af796f6c38(_JNIEnv *,_jobject *,_jobject *,_jobject *)+40p ...
  7. .text:00002A18                 CMP     R0, #0x9C       ; switch 157 cases
  8. .text:00002A1C                 ADDLS   PC, PC, R0,LSL#2 ; switch jump
  9. .text:00002A20 ; ---------------------------------------------------------------------------
  10. .text:00002A20
  11. .text:00002A20 loc_2A20                                ; CODE XREF: dcf13197d7a5901a5ad213f34001fe4(myString)+4j
  12. .text:00002A20                 B       locret_363C     ; jumptable 00002A1C default case
  13. .text:00002A24 ; ---------------------------------------------------------------------------
  14. .text:00002A24

_Z31dcf13197d7a5901a5ad213f34001fe48myString就是这个解密函数的名字。

接下来就可以写代码，调用so解密了：
hello.c

  1. /* hello.c: Hello World program */
  2. #include <stdlib.h>
  3. #include <stdio.h>
  4. #include <dlfcn.h>
  6. int main(int argc, char* argv[]){
  7.     int (*decode)(int);
  8.     void *handle;
  10.     handle = dlopen("/data/local/tmp/libnqshield.so", RTLD_LOCAL | RTLD_LAZY);
  11.     if ( !handle) {
  12.         printf("%s,%d, NULL == handle\n", __FUNCTION__, __LINE__);
  13.         return -1;
  14.     }
  16.     decode = (int (*)(int)) dlsym(handle, "_Z31dcf13197d7a5901a5ad213f34001fe48myString");
  18.     const char *errstr;
  19.     errstr = (char *) dlerror();
  20.     if (errstr != NULL)
  21.         printf ("A dynamic linking error occurred: (%s)\n", errstr);
  23.     printf("%s\n", decode(110));
  24.     printf("%s\n", decode(115));
  25.     printf("%s\n", decode(111));
  26.     printf("%s\n", decode(116));
  27.     printf("%s\n", decode(112));
  28.     printf("%s\n", decode(117));
  29.     printf("%s\n", decode(113));
  30.     printf("%s\n", decode(118));
  31.     printf("%s\n", decode(114));
  32.     printf("%s\n", decode(119));
  34.     dlclose(handle);
  35. }

makefile

  1. NDK_ROOT=D:\android-ndk-r10d
  2. TOOLCHAINS_ROOT=$(NDK_ROOT)/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64
  3. TOOLCHAINS_PREFIX=$(TOOLCHAINS_ROOT)/bin/arm-linux-androideabi
  4. TOOLCHAINS_INCLUDE=$(TOOLCHAINS_ROOT)/lib/gcc/arm-linux-androideabi/4.9/include-fixed
  6. PLATFORM_ROOT=$(NDK_ROOT)/platforms/android-19/arch-arm
  7. PLATFORM_INCLUDE=$(PLATFORM_ROOT)/usr/include
  8. PLATFORM_LIB=$(PLATFORM_ROOT)/usr/lib
  10. MODULE_NAME=hello
  11. RM=rm
  13. FLAGS=-I$(TOOLCHAINS_INCLUDE) \
  14.     -I$(PLATFORM_INCLUDE) \
  15.     -L$(PLATFORM_LIB) \
  16.     -nostdlib \
  17.     -lgcc \
  18.     -Bdynamic \
  19.     -lc
  21. OBJS=$(MODULE_NAME).o \
  22.     $(PLATFORM_LIB)/crtbegin_dynamic.o \
  23.     $(PLATFORM_LIB)/crtend_android.o
  25. all:
  26.     $(TOOLCHAINS_PREFIX)-gcc $(FLAGS) -E $(MODULE_NAME).c -o $(MODULE_NAME).i
  27.     $(TOOLCHAINS_PREFIX)-gcc $(FLAGS) -S $(MODULE_NAME).i -o $(MODULE_NAME).s
  28.     $(TOOLCHAINS_PREFIX)-gcc $(FLAGS) -c $(MODULE_NAME).s -o $(MODULE_NAME).o
  29.     $(TOOLCHAINS_PREFIX)-gcc $(FLAGS) -ldl $(OBJS) -o $(MODULE_NAME)
  30. clean:
  31.     $(RM) *.o
  32. install:
  33.     adb push $(MODULE_NAME) /data/local/tmp/
  34.     adb push libnqshield.so /data/local/tmp/
  35.     adb shell chmod 755 /data/local/tmp/$(MODULE_NAME)
  36.     adb shell /data/local/tmp/$(MODULE_NAME)

编译，执行

  1. $ make
  2. D:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc -ID:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/lib/gcc/arm-linux-androideabi/4.9/include-fixed -ID:\android-ndk-r10d/platforms/android-19/arch-arm/usr/include -LD:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib -nostdlib -lgcc -Bdynamic -lc -E hello.c -o hello.i
  3. D:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc -ID:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/lib/gcc/arm-linux-androideabi/4.9/include-fixed -ID:\android-ndk-r10d/platforms/android-19/arch-arm/usr/include -LD:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib -nostdlib -lgcc -Bdynamic -lc -S hello.i -o hello.s
  4. D:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc -ID:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/lib/gcc/arm-linux-androideabi/4.9/include-fixed -ID:\android-ndk-r10d/platforms/android-19/arch-arm/usr/include -LD:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib -nostdlib -lgcc -Bdynamic -lc -c hello.s -o hello.o
  5. D:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/bin/arm-linux-androideabi-gcc -ID:\android-ndk-r10d/toolchains/arm-linux-androideabi-4.9/prebuilt/windows-x86_64/lib/gcc/arm-linux-androideabi/4.9/include-fixed -ID:\android-ndk-r10d/platforms/android-19/arch-arm/usr/include -LD:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib -nostdlib -lgcc -Bdynamic -lc -ldl hello.o D:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib/crtbegin_dynamic.o D:\android-ndk-r10d/platforms/android-19/arch-arm/usr/lib/crtend_android.o -o hello
  7. $ make install
  8. adb push hello /data/local/tmp/
  9. 99 KB/s (6328 bytes in 0.062s)
  10. adb push libnqshield.so /data/local/tmp/
  11. 1249 KB/s (50524 bytes in 0.039s)
  12. adb shell chmod 755 /data/local/tmp/hello
  13. adb shell /data/local/tmp/hello
  14. nq10
  15. (Ljava/lang/String;Ljava/lang/String;I)V
  16. nq11
  17. (Ljava/lang/String;I)V
  18. nq12
  19. (Landroid/content/Context;Ljava/lang/ClassLoader;I)V
  20. nq13
  21. (Ljava/lang/String;I)V
  22. nq14
  23. (Ljava/lang/String;I)V

得到最后的函数对应表：

函数名 参数 本地方法
nq10 (Ljava/lang/String;Ljava/lang/String;I)V b9df1ce797fd03603fd7137afff2957
nq11 (Ljava/lang/String;I)V eb5993d402df42eac47e82555b7ae31
nq12 (Landroid/content/Context;Ljava/lang/ClassLoader;I)V fa3f3a501e8754e88bed48c128ef90
nq13 (Ljava/lang/String;I)V abc020d3ee6fbc05ab1ed6b4da7252d
nq14 (Ljava/lang/String;I)V e300588cc034bcbaa7d61

接下来只需要对其重命名即可。

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