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寫之前需要準(zhǔn)備以下內(nèi)容
android studio 已ROOT安卓設(shè)備 GG修改器
打開android studio,創(chuàng)建Native C++ Project
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="btn" /> <TextView android:id="@+id/tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="~" /> </LinearLayout>
MainActivity.java
package com.gs.jc; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private TextView textView; private JNI jni; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); jni = new JNI(); textView = (TextView) findViewById(R.id.tv); } public void btn(View view) { textView.setText(String.valueOf(jni.searchMem())); } }
新建一個(gè)java類,以實(shí)現(xiàn)java調(diào)用對應(yīng)C代碼
package com.gs.jc; public class JNI { static { System.loadLibrary("native-lib"); } /* *定義native方法 *調(diào)用C代碼對應(yīng)的方法 */ public native int searchMem(); }
O_RDONLY只讀打開
O_WRONLY只寫打開
O_RDWR可讀可寫打開
O_SYNC以同步的方式打開文件
C++核心代碼
#include <jni.h> #include <string> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <dirent.h> #include <unistd.h> static int fd = 0; //查找游戲進(jìn)程pid int getPID(const char *pack_name) { int id = -1, pid = -1; DIR *dir = 0; FILE *file = 0; char filename[32] = {0}; char cmdline[256] = {0}; struct dirent *entry = 0; if (pack_name == NULL) { return -1; } dir = opendir("/proc"); if (dir == NULL) { return -1; } while ((entry = readdir(dir)) != NULL) { id = atoi(entry->d_name); if (id > 0) { sprintf(filename, "/proc/%d/cmdline", id); file = fopen(filename, "r"); if (file) { fgets(cmdline, sizeof(cmdline), file); fclose(file); if (strcmp(pack_name, cmdline) == 0) { pid = id; break; } } } } closedir(dir); return pid; } //打開文件句柄 int open_proc_mem(int pid) { if (pid <= 0) return -1; char mempath[64] = {0}; int handle = -1; sprintf(mempath, "/proc/%d/mem", pid); handle = open(mempath, O_RDWR, O_SYNC); return handle; } //讀內(nèi)存 void pread64_mem(int fd, void *buff, int size, long *addr) { if (fd <= 0 || buff == NULL || size <= 0 || addr == NULL) return; pread64(fd, buff, size, (unsigned long) addr); } //寫內(nèi)存 void pwrite64_mem(int fd, const void *buff, int size, long *addr) { if (fd <= 0 || buff == NULL || size <= 0 || addr == NULL) return; pwrite64(fd, buff, size, (unsigned long) addr); } extern "C" jint Java_com_gs_jc_JNI_searchMem(JNIEnv *env, jobject thiz) { char *game = "com.tencent.tmgp.sgame"; //包名 int pid = getPID(game); //獲取進(jìn)程PID fd = open_proc_mem(pid); //打開進(jìn)程內(nèi)存 //long base = 0; long buf[1] = {666}; //需要修改內(nèi)存的值 long *addr = (long *) 0x12C0085C; //內(nèi)存地址:0x12C0085C pwrite64_mem(fd, &buf[0], 4, addr); //寫入內(nèi)存數(shù)據(jù) //pread64_mem(fd, &base, 4, addr); return pid; }
C代碼中需要自行修改的地方
char *game = “com.tencent.tmgp.sgame”; //包名 long *addr = (long *) 0x12C0085C;//內(nèi)存地址
效果圖鏈接:yuanma/men_jb51.rar
以上是簡單的內(nèi)存地址修改方法,到此這篇關(guān)于android調(diào)用C語言實(shí)現(xiàn)內(nèi)存的讀取與修改的方法示例的文章就介紹到這了,更多相關(guān)android調(diào)用C語言實(shí)現(xiàn)內(nèi)存讀取修改內(nèi)容請搜索億速云以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持億速云!
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