├── .gitignore ├── .gitmodules ├── LICENSE ├── README.md ├── build.gradle ├── gradle.properties ├── gradle └── wrapper │ ├── gradle-wrapper.jar │ └── gradle-wrapper.properties ├── gradlew ├── gradlew.bat ├── module ├── .gitignore ├── build.gradle ├── jni │ ├── Android.mk │ ├── Application.mk │ ├── companion.cpp │ ├── main.cpp │ ├── muteipc.h │ ├── nopFun.cpp │ └── zygisk.hpp └── src │ └── main │ └── AndroidManifest.xml └── settings.gradle /.gitignore: -------------------------------------------------------------------------------- 1 | *.iml 2 | .gradle 3 | /local.properties 4 | /.idea 5 | .DS_Store 6 | /build 7 | /captures 8 | .externalNativeBuild 9 | .cxx 10 | local.properties 11 | -------------------------------------------------------------------------------- /.gitmodules: -------------------------------------------------------------------------------- 1 | [submodule "libcxx"] 2 | path = module/jni/libcxx 3 | url = https://github.com/topjohnwu/libcxx.git 4 | [submodule "module/jni/proc_maps_parser"] 5 | path = module/jni/proc_maps_parser 6 | url = https://github.com/F-19-F/proc_maps_parser 7 | branch = android 8 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # zygisk-logmute 2 | A zygisk module that keeps logd from draining battery 3 | 4 | 5 | ## 1.How does it work? 6 | By injecting nop opcode to __android_log_logd_logger 7 | 8 | 9 | ## 2.How to keep my app from muting? 10 | ```shell 11 | packagename="com.myapp.example" 12 | echo "${packagename}" >> /data/local/tmp/log_whitelist.conf 13 | # let companion update whitelist 14 | chmod 0660 /data/local/tmp/log_whitelist.conf 15 | ``` -------------------------------------------------------------------------------- /build.gradle: -------------------------------------------------------------------------------- 1 | // Top-level build file where you can add configuration options common to all sub-projects/modules. 2 | buildscript { 3 | repositories { 4 | google() 5 | mavenCentral() 6 | } 7 | dependencies { 8 | classpath "com.android.tools.build:gradle:7.0.3" 9 | 10 | // NOTE: Do not place your application dependencies here; they belong 11 | // in the individual module build.gradle files 12 | } 13 | } 14 | 15 | task clean(type: Delete) { 16 | delete rootProject.buildDir 17 | } 18 | -------------------------------------------------------------------------------- /gradle.properties: -------------------------------------------------------------------------------- 1 | # Project-wide Gradle settings. 2 | # IDE (e.g. Android Studio) users: 3 | # Gradle settings configured through the IDE *will override* 4 | # any settings specified in this file. 5 | # For more details on how to configure your build environment visit 6 | # http://www.gradle.org/docs/current/userguide/build_environment.html 7 | # Specifies the JVM arguments used for the daemon process. 8 | # The setting is particularly useful for tweaking memory settings. 9 | org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8 10 | # When configured, Gradle will run in incubating parallel mode. 11 | # This option should only be used with decoupled projects. More details, visit 12 | # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects 13 | # org.gradle.parallel=true 14 | # AndroidX package structure to make it clearer which packages are bundled with the 15 | # Android operating system, and which are packaged with your app"s APK 16 | # https://developer.android.com/topic/libraries/support-library/androidx-rn 17 | android.useAndroidX=true 18 | # Automatically convert third-party libraries to use AndroidX 19 | android.enableJetifier=true 20 | -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/F-19-F/zygisk-logmute/6be1215b717d6521017c224a71f10cbd9226ed55/gradle/wrapper/gradle-wrapper.jar -------------------------------------------------------------------------------- /gradle/wrapper/gradle-wrapper.properties: -------------------------------------------------------------------------------- 1 | #Sun Sep 26 02:13:18 PDT 2021 2 | distributionBase=GRADLE_USER_HOME 3 | distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip 4 | distributionPath=wrapper/dists 5 | zipStorePath=wrapper/dists 6 | zipStoreBase=GRADLE_USER_HOME 7 | -------------------------------------------------------------------------------- /gradlew: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env sh 2 | 3 | # 4 | # Copyright 2015 the original author or authors. 5 | # 6 | # Licensed under the Apache License, Version 2.0 (the "License"); 7 | # you may not use this file except in compliance with the License. 8 | # You may obtain a copy of the License at 9 | # 10 | # https://www.apache.org/licenses/LICENSE-2.0 11 | # 12 | # Unless required by applicable law or agreed to in writing, software 13 | # distributed under the License is distributed on an "AS IS" BASIS, 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 | # See the License for the specific language governing permissions and 16 | # limitations under the License. 17 | # 18 | 19 | ############################################################################## 20 | ## 21 | ## Gradle start up script for UN*X 22 | ## 23 | ############################################################################## 24 | 25 | # Attempt to set APP_HOME 26 | # Resolve links: $0 may be a link 27 | PRG="$0" 28 | # Need this for relative symlinks. 29 | while [ -h "$PRG" ] ; do 30 | ls=`ls -ld "$PRG"` 31 | link=`expr "$ls" : '.*-> \(.*\)$'` 32 | if expr "$link" : '/.*' > /dev/null; then 33 | PRG="$link" 34 | else 35 | PRG=`dirname "$PRG"`"/$link" 36 | fi 37 | done 38 | SAVED="`pwd`" 39 | cd "`dirname \"$PRG\"`/" >/dev/null 40 | APP_HOME="`pwd -P`" 41 | cd "$SAVED" >/dev/null 42 | 43 | APP_NAME="Gradle" 44 | APP_BASE_NAME=`basename "$0"` 45 | 46 | # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 47 | DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' 48 | 49 | # Use the maximum available, or set MAX_FD != -1 to use that value. 50 | MAX_FD="maximum" 51 | 52 | warn () { 53 | echo "$*" 54 | } 55 | 56 | die () { 57 | echo 58 | echo "$*" 59 | echo 60 | exit 1 61 | } 62 | 63 | # OS specific support (must be 'true' or 'false'). 64 | cygwin=false 65 | msys=false 66 | darwin=false 67 | nonstop=false 68 | case "`uname`" in 69 | CYGWIN* ) 70 | cygwin=true 71 | ;; 72 | Darwin* ) 73 | darwin=true 74 | ;; 75 | MINGW* ) 76 | msys=true 77 | ;; 78 | NONSTOP* ) 79 | nonstop=true 80 | ;; 81 | esac 82 | 83 | CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar 84 | 85 | 86 | # Determine the Java command to use to start the JVM. 87 | if [ -n "$JAVA_HOME" ] ; then 88 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 89 | # IBM's JDK on AIX uses strange locations for the executables 90 | JAVACMD="$JAVA_HOME/jre/sh/java" 91 | else 92 | JAVACMD="$JAVA_HOME/bin/java" 93 | fi 94 | if [ ! -x "$JAVACMD" ] ; then 95 | die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME 96 | 97 | Please set the JAVA_HOME variable in your environment to match the 98 | location of your Java installation." 99 | fi 100 | else 101 | JAVACMD="java" 102 | which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 103 | 104 | Please set the JAVA_HOME variable in your environment to match the 105 | location of your Java installation." 106 | fi 107 | 108 | # Increase the maximum file descriptors if we can. 109 | if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then 110 | MAX_FD_LIMIT=`ulimit -H -n` 111 | if [ $? -eq 0 ] ; then 112 | if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then 113 | MAX_FD="$MAX_FD_LIMIT" 114 | fi 115 | ulimit -n $MAX_FD 116 | if [ $? -ne 0 ] ; then 117 | warn "Could not set maximum file descriptor limit: $MAX_FD" 118 | fi 119 | else 120 | warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" 121 | fi 122 | fi 123 | 124 | # For Darwin, add options to specify how the application appears in the dock 125 | if $darwin; then 126 | GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" 127 | fi 128 | 129 | # For Cygwin or MSYS, switch paths to Windows format before running java 130 | if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then 131 | APP_HOME=`cygpath --path --mixed "$APP_HOME"` 132 | CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` 133 | 134 | JAVACMD=`cygpath --unix "$JAVACMD"` 135 | 136 | # We build the pattern for arguments to be converted via cygpath 137 | ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` 138 | SEP="" 139 | for dir in $ROOTDIRSRAW ; do 140 | ROOTDIRS="$ROOTDIRS$SEP$dir" 141 | SEP="|" 142 | done 143 | OURCYGPATTERN="(^($ROOTDIRS))" 144 | # Add a user-defined pattern to the cygpath arguments 145 | if [ "$GRADLE_CYGPATTERN" != "" ] ; then 146 | OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" 147 | fi 148 | # Now convert the arguments - kludge to limit ourselves to /bin/sh 149 | i=0 150 | for arg in "$@" ; do 151 | CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` 152 | CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option 153 | 154 | if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition 155 | eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` 156 | else 157 | eval `echo args$i`="\"$arg\"" 158 | fi 159 | i=`expr $i + 1` 160 | done 161 | case $i in 162 | 0) set -- ;; 163 | 1) set -- "$args0" ;; 164 | 2) set -- "$args0" "$args1" ;; 165 | 3) set -- "$args0" "$args1" "$args2" ;; 166 | 4) set -- "$args0" "$args1" "$args2" "$args3" ;; 167 | 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; 168 | 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; 169 | 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; 170 | 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; 171 | 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; 172 | esac 173 | fi 174 | 175 | # Escape application args 176 | save () { 177 | for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done 178 | echo " " 179 | } 180 | APP_ARGS=`save "$@"` 181 | 182 | # Collect all arguments for the java command, following the shell quoting and substitution rules 183 | eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" 184 | 185 | exec "$JAVACMD" "$@" 186 | -------------------------------------------------------------------------------- /gradlew.bat: -------------------------------------------------------------------------------- 1 | @rem 2 | @rem Copyright 2015 the original author or authors. 3 | @rem 4 | @rem Licensed under the Apache License, Version 2.0 (the "License"); 5 | @rem you may not use this file except in compliance with the License. 6 | @rem You may obtain a copy of the License at 7 | @rem 8 | @rem https://www.apache.org/licenses/LICENSE-2.0 9 | @rem 10 | @rem Unless required by applicable law or agreed to in writing, software 11 | @rem distributed under the License is distributed on an "AS IS" BASIS, 12 | @rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 | @rem See the License for the specific language governing permissions and 14 | @rem limitations under the License. 15 | @rem 16 | 17 | @if "%DEBUG%" == "" @echo off 18 | @rem ########################################################################## 19 | @rem 20 | @rem Gradle startup script for Windows 21 | @rem 22 | @rem ########################################################################## 23 | 24 | @rem Set local scope for the variables with windows NT shell 25 | if "%OS%"=="Windows_NT" setlocal 26 | 27 | set DIRNAME=%~dp0 28 | if "%DIRNAME%" == "" set DIRNAME=. 29 | set APP_BASE_NAME=%~n0 30 | set APP_HOME=%DIRNAME% 31 | 32 | @rem Resolve any "." and ".." in APP_HOME to make it shorter. 33 | for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi 34 | 35 | @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. 36 | set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" 37 | 38 | @rem Find java.exe 39 | if defined JAVA_HOME goto findJavaFromJavaHome 40 | 41 | set JAVA_EXE=java.exe 42 | %JAVA_EXE% -version >NUL 2>&1 43 | if "%ERRORLEVEL%" == "0" goto execute 44 | 45 | echo. 46 | echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 47 | echo. 48 | echo Please set the JAVA_HOME variable in your environment to match the 49 | echo location of your Java installation. 50 | 51 | goto fail 52 | 53 | :findJavaFromJavaHome 54 | set JAVA_HOME=%JAVA_HOME:"=% 55 | set JAVA_EXE=%JAVA_HOME%/bin/java.exe 56 | 57 | if exist "%JAVA_EXE%" goto execute 58 | 59 | echo. 60 | echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 61 | echo. 62 | echo Please set the JAVA_HOME variable in your environment to match the 63 | echo location of your Java installation. 64 | 65 | goto fail 66 | 67 | :execute 68 | @rem Setup the command line 69 | 70 | set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar 71 | 72 | 73 | @rem Execute Gradle 74 | "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* 75 | 76 | :end 77 | @rem End local scope for the variables with windows NT shell 78 | if "%ERRORLEVEL%"=="0" goto mainEnd 79 | 80 | :fail 81 | rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of 82 | rem the _cmd.exe /c_ return code! 83 | if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 84 | exit /b 1 85 | 86 | :mainEnd 87 | if "%OS%"=="Windows_NT" endlocal 88 | 89 | :omega 90 | -------------------------------------------------------------------------------- /module/.gitignore: -------------------------------------------------------------------------------- 1 | /build 2 | /libs 3 | /obj 4 | -------------------------------------------------------------------------------- /module/build.gradle: -------------------------------------------------------------------------------- 1 | plugins { 2 | id 'com.android.library' 3 | } 4 | 5 | android { 6 | externalNativeBuild { 7 | ndkBuild { 8 | path("jni/Android.mk") 9 | } 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /module/jni/Android.mk: -------------------------------------------------------------------------------- 1 | LOCAL_PATH := $(call my-dir) 2 | 3 | include $(CLEAR_VARS) 4 | LOCAL_MODULE := logmute 5 | LOCAL_SRC_FILES := main.cpp nopFun.cpp companion.cpp 6 | LOCAL_STATIC_LIBRARIES := libcxx pmparser 7 | LOCAL_C_INCLUDES := pmparser 8 | LOCAL_LDLIBS := -llog 9 | include $(BUILD_SHARED_LIBRARY) 10 | 11 | include jni/libcxx/Android.mk 12 | include jni/proc_maps_parser/Android.mk 13 | # If you do not want to use libc++, link to system stdc++ 14 | # so that you can at least call the new operator in your code 15 | 16 | # include $(CLEAR_VARS) 17 | # LOCAL_MODULE := example 18 | # LOCAL_SRC_FILES := example.cpp 19 | # LOCAL_LDLIBS := -llog -lstdc++ 20 | # include $(BUILD_SHARED_LIBRARY) 21 | -------------------------------------------------------------------------------- /module/jni/Application.mk: -------------------------------------------------------------------------------- 1 | APP_ABI := armeabi-v7a arm64-v8a 2 | APP_CPPFLAGS := -std=c++17 -fno-exceptions -fno-rtti -fvisibility=hidden -fvisibility-inlines-hidden 3 | APP_STL := none 4 | APP_PLATFORM := android-21 5 | -------------------------------------------------------------------------------- /module/jni/companion.cpp: -------------------------------------------------------------------------------- 1 | // 2 | // Created by TF19 on 2022/11/20. 3 | // 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include "muteipc.h" 18 | #include 19 | using namespace std; 20 | extern int nopLog(int pid); 21 | extern off_t orig_len; 22 | extern u_int8_t* backup_code; 23 | int elftype(pid_t pid); 24 | bool isignore(pid_t pid); 25 | [[noreturn]] 26 | void mon(); 27 | void bootTrigger(); 28 | companion* controller; 29 | static bool booted = false; 30 | companion::companion() { 31 | LOGD("LogMute init"); 32 | controller = this; 33 | nativeNop(); 34 | thread t1(mon); 35 | t1.detach(); 36 | thread t2(bootTrigger); 37 | t2.detach(); 38 | LOGD("LogMute init done!"); 39 | // LOGD("init loop done!"); 40 | } 41 | void companion::nativeNop() { 42 | DIR* proc; 43 | dirent* tmp; 44 | pid_t pid; 45 | proc = opendir("/proc"); 46 | if(proc == nullptr){ 47 | LOGD("open proc:%s", strerror(errno)); 48 | } 49 | while ((tmp = readdir(proc))!=nullptr){ 50 | pid = atoi(tmp->d_name); 51 | if(pid == getpid()){ 52 | continue; 53 | } 54 | if(pid){ 55 | // pids.insert(make_pair(pid, true)); 56 | if(!isignore(pid)){ 57 | int t = elftype(pid); 58 | if(t<0){ 59 | continue; 60 | } 61 | #ifdef __arm__ 62 | if( t != EM_ARM){ 63 | continue; 64 | } 65 | #endif 66 | #ifdef __aarch64__ 67 | if (t != EM_AARCH64){ 68 | continue; 69 | } 70 | #endif 71 | if(native_nop[pid]){ 72 | continue; 73 | } 74 | if(doMemNop(pid) != 0){ 75 | LOGD("NOP %d fail!",pid); 76 | }else{ 77 | this->native_nop[pid]= true; 78 | // LOGD("NOP %d success!",pid); 79 | } 80 | } 81 | } 82 | } 83 | closedir(proc); 84 | } 85 | void companion::handler(int fd) { 86 | rootcmd cmd; 87 | cmdresult res; 88 | read(fd, &cmd, sizeof(cmd)); 89 | switch (cmd.opcode) { 90 | case CMD_CHECK_POLICY: 91 | if(checkPolicy((char *)cmd.data)){ 92 | res.result = RESULT_UNMUTE; 93 | memcpy(res.data,backup_code,orig_len); 94 | res.len = orig_len; 95 | } else{ 96 | res.result = RESULT_MUTE; 97 | } 98 | break; 99 | } 100 | write(fd, &res, sizeof(res)); 101 | } 102 | int companion::doMemNop(int pid) { 103 | return nopLog(pid); 104 | } 105 | void companion::setPolicy(std::string pkgname, bool sw) { 106 | policy[pkgname]=sw; 107 | } 108 | bool companion::checkPolicy(std::string pkgname) { 109 | auto r = this->policy.find(pkgname); 110 | if(r != this->policy.end()){ 111 | return r->second; 112 | } 113 | return false; 114 | } 115 | 116 | bool isignore(pid_t pid){ 117 | string p = "/proc/"+ to_string(pid)+"/exe"; 118 | char buf[PATH_MAX] = {0}; 119 | int size = readlink(p.c_str(),buf,PATH_MAX); 120 | if(size < 0){ 121 | // LOGD("readlink: %s %s",p.c_str(), strerror(errno)); 122 | return true; 123 | } 124 | buf[size] = '\0'; 125 | // if(booted && strstr(buf,"/system/bin/app_process") != nullptr){ 126 | if(booted && strstr(buf,"/system/bin/app_process") != nullptr){ 127 | struct stat s; 128 | stat(("/proc/"+ to_string(pid)).c_str(),&s); 129 | // 非app进程 130 | if( s.st_uid> 1000 && s.st_uid < 10000){ 131 | // LOGD("pid %d non normal app!",pid); 132 | return false; 133 | } 134 | } 135 | // return true; 136 | // int fd = open(("/proc/"+ to_string(pid) + "/cmdline").c_str(),O_RDONLY); 137 | // if(fd < 0){ 138 | // LOGD("fd < 0 %s", strerror(errno)); 139 | // return true; 140 | // } 141 | // char cmd[PATH_MAX] = {0}; 142 | // read(fd,cmd,PATH_MAX); 143 | // close(fd); 144 | // if(strcmp(cmd,"zygote") == 0 || strcmp(cmd,"zygote64") == 0){ 145 | // return false; 146 | // } 147 | // } 148 | if(strstr(buf,"/bin/adbd") != nullptr || strstr(buf,"magisk") != nullptr || strstr(buf,"/system/bin/init") != nullptr || strstr(buf,"logd") != nullptr){ 149 | return true; 150 | }else{ 151 | return false; 152 | } 153 | } 154 | 155 | 156 | 157 | int elftype(pid_t pid){ 158 | string p = "/proc/"+ to_string(pid)+"/exe"; 159 | int fd = open(p.c_str(),O_RDONLY); 160 | if(fd < 0){ 161 | // LOGD("open: %s %s",p.c_str(), strerror(errno)); 162 | return -1; 163 | } 164 | Elf64_Ehdr header; 165 | read(fd,&header,sizeof(Elf64_Ehdr)); 166 | close(fd); 167 | return header.e_machine; 168 | } 169 | #define CONFIG_FILE "/data/local/tmp/log_whitelist.conf" 170 | void createConfig(){ 171 | fstream f(CONFIG_FILE,ios::out); 172 | f<<"# write log white pkgname list here \n"; 173 | f.close(); 174 | chmod(CONFIG_FILE,S_IREAD|S_IWRITE|S_IRGRP|S_IWGRP); 175 | chown(CONFIG_FILE,2000,2000); 176 | } 177 | void mon() 178 | { 179 | int fd = inotify_init(); 180 | if(inotify_add_watch(fd, CONFIG_FILE, IN_ATTRIB)<0){ 181 | createConfig(); 182 | inotify_add_watch(fd, CONFIG_FILE, IN_ATTRIB); 183 | } 184 | struct inotify_event *event; 185 | uint8_t buf[500]; 186 | chmod(CONFIG_FILE,S_IREAD|S_IWRITE|S_IRGRP|S_IWGRP); 187 | while (true) 188 | { 189 | if (read(fd, buf, sizeof(buf)) < 0) 190 | { 191 | perror("read"); 192 | } 193 | event = (struct inotify_event *)buf; 194 | fstream config(CONFIG_FILE,ios::in); 195 | if(!config){ 196 | LOGD("CONFIG file not exists!Creating"); 197 | createConfig(); 198 | inotify_add_watch(fd,CONFIG_FILE,IN_ATTRIB); 199 | } 200 | LOGD("LOADING config files"); 201 | string line; 202 | vector whitelist; 203 | for( std::string line; getline( config, line ); ){ 204 | if(!line.empty()){ 205 | if(line[0]=='#'){ 206 | continue; 207 | } 208 | if(controller!= nullptr){ 209 | LOGD("add white %s",line.c_str()); 210 | whitelist.push_back(line); 211 | controller->setPolicy(line,true); 212 | } 213 | } 214 | } 215 | for (auto i = controller->policy.begin(); i != controller->policy.end() ;) { 216 | auto r = find(whitelist.begin(),whitelist.end(),i->first); 217 | if(r==whitelist.end()){ 218 | LOGD("remove %s",i->first.c_str()); 219 | i = controller->policy.erase(i); 220 | // i->second = false; 221 | }else{ 222 | ++i; 223 | } 224 | } 225 | config.close(); 226 | } 227 | } 228 | void bootTrigger(){ 229 | char buf[20]="0"; 230 | while (true){ 231 | __system_property_get("sys.boot_completed",buf); 232 | if(atoi(buf) == 1){ 233 | LOGD("boot_completed"); 234 | booted = true; 235 | controller->nativeNop(); 236 | break; 237 | } 238 | sleep(1); 239 | } 240 | } -------------------------------------------------------------------------------- /module/jni/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include "zygisk.hpp" 8 | #include "muteipc.h" 9 | using zygisk::Api; 10 | using zygisk::AppSpecializeArgs; 11 | using zygisk::ServerSpecializeArgs; 12 | 13 | 14 | extern void restoreFunArm(void *addr, uint8_t *code,off_t len); 15 | extern void restoreFunArm64(void* addr, uint8_t *code,off_t len); 16 | class LogMute : public zygisk::ModuleBase { 17 | public: 18 | void onLoad(Api *api, JNIEnv *env) override { 19 | this->api = api; 20 | this->env = env; 21 | } 22 | 23 | void preAppSpecialize(AppSpecializeArgs *args) override { 24 | // Use JNI to fetch our process name 25 | const char *process = env->GetStringUTFChars(args->nice_name, nullptr); 26 | preSpecialize(process); 27 | env->ReleaseStringUTFChars(args->nice_name, process); 28 | } 29 | 30 | void preServerSpecialize(ServerSpecializeArgs *args) override { 31 | preSpecialize("system_server"); 32 | } 33 | 34 | private: 35 | Api *api; 36 | JNIEnv *env; 37 | 38 | void preSpecialize(const char *process) { 39 | // Demonstrate connecting to to companion process 40 | // We ask the companion for a random number 41 | int fd = api->connectCompanion(); 42 | cmdresult res; 43 | rootcmd cmd = {0}; 44 | cmd.opcode = CMD_CHECK_POLICY; 45 | strcpy((char *)cmd.data,process); 46 | write(fd,&cmd,sizeof(cmd)); 47 | read(fd, &res, sizeof(res)); 48 | close(fd); 49 | if(res.result != RESULT_UNMUTE){ 50 | api->setOption(zygisk::Option::DLCLOSE_MODULE_LIBRARY); 51 | return; 52 | } 53 | unsigned long code = *(unsigned long *)res.data; 54 | void* handle = dlopen("liblog.so",RTLD_NOW); 55 | 56 | if(handle == NULL){ 57 | LOGD("handle = NULL"); 58 | return; 59 | } 60 | void* funPtr = dlsym(handle,"__android_log_logd_logger"); 61 | if(funPtr == NULL){ 62 | LOGD("funPtr = NULL"); 63 | return; 64 | } 65 | procmaps_struct* maps_tmp=NULL; 66 | procmaps_iterator* maps = pmparser_parse(-1); 67 | if(maps==NULL){ 68 | LOGD("[map]: cannot parse the memory map"); 69 | return; 70 | } 71 | // makes address writable 72 | while( (maps_tmp = pmparser_next(maps)) != NULL){ 73 | if((void *)funPtr > maps_tmp->addr_start && (void *)funPtr < maps_tmp->addr_end){ 74 | // pmparser_print(maps_tmp,0); 75 | // +w 76 | if (mprotect(maps_tmp->addr_start,maps_tmp->length,PROT_EXEC|PROT_WRITE|PROT_READ) != 0){ 77 | LOGD("mprotect : %s", strerror(errno)); 78 | break; 79 | } 80 | // write original code 81 | #ifdef __arm__ 82 | restoreFunArm(funPtr,res.data,res.len); 83 | #endif 84 | #ifdef __aarch64__ 85 | restoreFunArm64(funPtr,res.data,res.len); 86 | #endif 87 | // -w 88 | if (mprotect(maps_tmp->addr_start,maps_tmp->length,PROT_EXEC|PROT_READ) != 0){ 89 | LOGD("mprotect : %s", strerror(errno)); 90 | break; 91 | } 92 | break; 93 | } 94 | } 95 | pmparser_free(maps); 96 | 97 | 98 | // Since we do not hook any functions, we should let Zygisk dlclose ourselves 99 | api->setOption(zygisk::Option::DLCLOSE_MODULE_LIBRARY); 100 | } 101 | 102 | }; 103 | // run in zygiskd with root privileges 104 | static companion *impl; 105 | static void companion_handler(int i) { 106 | if(impl == nullptr){ 107 | impl = new companion(); 108 | } 109 | impl->handler(i); 110 | } 111 | 112 | REGISTER_ZYGISK_MODULE(LogMute) 113 | REGISTER_ZYGISK_COMPANION(companion_handler) 114 | -------------------------------------------------------------------------------- /module/jni/muteipc.h: -------------------------------------------------------------------------------- 1 | // 2 | // Created by TF19 on 2022/11/20. 3 | // 4 | 5 | #ifndef ZYGISK_LOGMUTE_MUTEIPC_H 6 | #define ZYGISK_LOGMUTE_MUTEIPC_H 7 | #include 8 | #include 9 | #include 10 | enum { 11 | CMD_CHECK_POLICY 12 | }; 13 | enum { 14 | RESULT_MUTE, 15 | RESULT_UNMUTE 16 | }; 17 | typedef struct { 18 | int opcode; 19 | uint8_t data[100]; 20 | } rootcmd; 21 | typedef struct { 22 | int result; 23 | off_t len; 24 | uint8_t data[1000]; 25 | } cmdresult; 26 | 27 | class companion { 28 | public: 29 | companion(); 30 | void handler(int fd); 31 | bool checkPolicy(std::string pkgname); 32 | void setPolicy(std::string pkgname,bool sw); 33 | int doMemNop(int pid); 34 | std::map policy; 35 | std::map native_nop; 36 | void nativeNop(); 37 | }; 38 | #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, "LogMuter", __VA_ARGS__) 39 | #endif //ZYGISK_LOGMUTE_MUTEIPC_H 40 | -------------------------------------------------------------------------------- /module/jni/nopFun.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include "muteipc.h" 14 | //#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, "LogMuter", __VA_ARGS__) 15 | off_t orig_len = 0; 16 | u_int8_t* backup_code = nullptr; 17 | static u_int8_t* patch_code = nullptr; 18 | void genPatchAndBackup(void * addr); 19 | static u_int8_t arm64_paciasp_array[4] = {0x3f,0x23,0x03,0xd5}; 20 | static u_int8_t arm64_autiasp_array[4] = {0xbf,0x23,0x03,0xd5}; 21 | static u_int8_t arm64_nop_array[4] = {0x1f,0x20,0x03,0xd5}; 22 | // nop nop nop ret 23 | static u_int8_t arm64_ret_array[4] = {0xc0,0x03,0x5f,0xd6}; 24 | //static u_int8_t arm64_ret_array_pac[8] = {0x1f,0x20,0x03,0xd5,0xc0,0x03,0x5f,0xd6}; 25 | // bx lr bx lr 26 | static u_int8_t thumb_ret_array[4] = {0x70,0x47,0x70,0x47}; 27 | static u_int8_t arm_ret_array[4] = {0x1e,0xff,0x2f,0xe1}; 28 | void restoreFunArm64(void* addr, uint8_t *code,off_t len){ 29 | memcpy(addr,code,len); 30 | } 31 | void restoreFunArm(void *addr, uint8_t *code,off_t len){ 32 | if((off_t)addr % 2 != 0){ 33 | memcpy((void *)((off_t )addr - 1),code,len); 34 | } else{ 35 | memcpy((void *)addr,code,len); 36 | } 37 | } 38 | int ptrace_writedata(pid_t pid, uint8_t *pWriteAddr, uint8_t *pWriteData, size_t size) { 39 | long nWriteCount = 0; 40 | long nRemainCount = 0; 41 | uint8_t *pCurSrcBuf = pWriteData; 42 | uint8_t *pCurDestBuf = pWriteAddr; 43 | long lTmpBuf = 0; 44 | long i = 0; 45 | 46 | nWriteCount = size / sizeof(long); 47 | nRemainCount = size % sizeof(long); 48 | 49 | for (i = 0; i < nWriteCount; i++) { 50 | memcpy((void *)(&lTmpBuf), pCurSrcBuf, sizeof(long)); 51 | if (ptrace(PTRACE_POKETEXT, pid, (void *)pCurDestBuf, (void *)lTmpBuf) < 0) { 52 | return -1; 53 | } 54 | pCurSrcBuf += sizeof(long); 55 | pCurDestBuf += sizeof(long); 56 | } 57 | 58 | if (nRemainCount > 0) { 59 | lTmpBuf = ptrace(PTRACE_PEEKTEXT, pid, pCurDestBuf, NULL); 60 | memcpy((void *)(&lTmpBuf), pCurSrcBuf, nRemainCount); 61 | if (ptrace(PTRACE_POKETEXT, pid, pCurDestBuf, lTmpBuf) < 0){ 62 | return -1; 63 | } 64 | } 65 | return 0; 66 | } 67 | int do_nop(int pid,void* addr){ 68 | int stat = 0; 69 | int ret = -1; 70 | if(ptrace(PTRACE_ATTACH,pid) < 0){ 71 | perror("PTRACE_ATTACH"); 72 | return -1; 73 | } 74 | waitpid(pid,&stat,WUNTRACED); 75 | #ifdef __arm__ 76 | // thumb 77 | if((off_t)addr % 2 != 0){ 78 | if(ptrace_writedata(pid,(uint8_t*)((off_t)addr-1),patch_code,orig_len) == 0){ 79 | ret = 0; 80 | } 81 | } else{ 82 | if(ptrace_writedata(pid,(uint8_t*)addr,patch_code,orig_len) == 0){ 83 | ret = 0; 84 | } 85 | } 86 | 87 | #endif 88 | #ifdef __aarch64__ 89 | if(ptrace_writedata(pid,(uint8_t*)addr,patch_code,orig_len) == 0){ 90 | ret = 0; 91 | } 92 | #endif 93 | if(ptrace(PTRACE_DETACH,pid,NULL,0) < 0){ 94 | perror("PTRACE_DETACH"); 95 | return ret; 96 | } 97 | return ret; 98 | } 99 | int getAddrMap(void *p,int pid,procmaps_struct *res){ 100 | int ret = -1; 101 | procmaps_struct* maps_tmp=NULL; 102 | // // foo(); 103 | procmaps_iterator* maps = pmparser_parse(pid); 104 | if(maps==NULL){ 105 | // LOGD("sopid = %d",getpid()); 106 | LOGD("maps==NULL"); 107 | fprintf (stderr,"[map]: cannot parse the memory map of %d\n",pid); 108 | return -1; 109 | } 110 | while( (maps_tmp = pmparser_next(maps)) != NULL){ 111 | if((void *)p > maps_tmp->addr_start && (void *)p < maps_tmp->addr_end){ 112 | *res = *maps_tmp; 113 | ret = 0; 114 | LOGD("addr found"); 115 | break; 116 | } 117 | } 118 | pmparser_free(maps); 119 | 120 | return ret; 121 | } 122 | int getOffset(const char* dlname,const char* symbol,uint64_t* res){ 123 | void* handle = dlopen(dlname,RTLD_NOW); 124 | if(handle == NULL){ 125 | LOGD("dlopen error"); 126 | perror("dlopen"); 127 | return -1; 128 | } 129 | void* fun = dlsym(handle,symbol); 130 | if(fun == NULL){ 131 | LOGD("dlsym error"); 132 | perror("dlsym"); 133 | return -1; 134 | } 135 | procmaps_struct local_map; 136 | if(getAddrMap(fun,-1,&local_map)){ 137 | LOGD("getAddrMap error"); 138 | fprintf(stderr,"getAddrMap error\n"); 139 | return -1; 140 | } 141 | fprintf(stdout,"handle = 0x%" PRIx64 "\n",(uint64_t)handle); 142 | fprintf(stdout,"map_start = 0x%" PRIx64 "\n",(uint64_t)local_map.addr_start); 143 | fprintf(stdout,"fun_start = 0x%" PRIx64 "\n",(uint64_t)fun); 144 | if(patch_code == nullptr){ 145 | genPatchAndBackup(fun); 146 | } 147 | *res = (uint64_t)fun - (uint64_t)local_map.addr_start; 148 | return 0; 149 | 150 | } 151 | int findXMapByname(int pid,procmaps_struct *res,const char* pattern){ 152 | int ret = -1; 153 | procmaps_struct* maps_tmp=NULL; 154 | procmaps_iterator* maps = pmparser_parse(pid); 155 | if(maps==NULL){ 156 | LOGD("findXMapByname:maps==NULL"); 157 | fprintf (stderr,"[map]: cannot parse the memory map of %d\n",pid); 158 | return -1; 159 | } 160 | while( (maps_tmp = pmparser_next(maps)) != NULL){ 161 | if(maps_tmp->is_x && strstr(maps_tmp->pathname,pattern)!=NULL){ 162 | *res = *maps_tmp; 163 | ret = 0; 164 | break; 165 | } 166 | } 167 | pmparser_free(maps); 168 | return ret; 169 | } 170 | int getRemoteAddr(int pid,const char* dlname,const char* symbol,uint64_t* res){ 171 | static uint64_t offset = 0; 172 | if(offset == 0 && getOffset(dlname,symbol,&offset)<0){ 173 | // LOGD("getRemoteAddr :offset error!"); 174 | return -1; 175 | } 176 | procmaps_struct remote_map; 177 | if(findXMapByname(pid,&remote_map,dlname)){ 178 | // LOGD("getRemoteAddr :findXMapByname error!"); 179 | fprintf(stderr,"findXMapByname not found\n"); 180 | return -1; 181 | } 182 | fprintf(stdout,"remote_map_start = 0x%" PRIx64 "\n",(uint64_t)remote_map.addr_start); 183 | *res = (uint64_t)remote_map.addr_start + offset; 184 | return 0; 185 | } 186 | #define TARGET_LIBRARY "liblog.so" 187 | #define TARGET_SYMBOL "__android_log_logd_logger" 188 | int nopLog(int pid){ 189 | uint64_t rmote_addr; 190 | if(getRemoteAddr(pid,TARGET_LIBRARY,TARGET_SYMBOL,&rmote_addr)<0){ 191 | // LOGD("getRemoteAddr fail!"); 192 | return -1; 193 | } 194 | // fprintf(stdout,"remote_fun_start = 0x%" PRIx64 "\n",(uint64_t)rmote_addr); 195 | return do_nop(pid,(void *)rmote_addr); 196 | } 197 | //unsigned long ptrace_read(void * addr){ 198 | // 199 | //} 200 | // should be called only once 201 | void genPatchAndBackup(void * addr){ 202 | #ifdef __arm__ 203 | orig_len = 4; 204 | backup_code = (uint8_t *) malloc(orig_len); 205 | patch_code = (uint8_t *) malloc(orig_len); 206 | if((off_t)addr % 2 !=0){ 207 | memcpy(backup_code,(void *)((off_t)addr - 1),orig_len); 208 | *(uint32_t*) patch_code = *(uint32_t*)thumb_ret_array; 209 | } else{ 210 | memcpy(backup_code,(void *)addr,orig_len); 211 | *(uint32_t*) patch_code = *(uint32_t*)arm_ret_array; 212 | } 213 | #endif 214 | #ifdef __aarch64__ 215 | void * begin = addr; 216 | u_int32_t arm64_paciasp = *(u_int32_t *)arm64_paciasp_array; 217 | u_int32_t arm64_autiasp = *(u_int32_t *)arm64_autiasp_array; 218 | u_int32_t arm64_nop = *(u_int32_t *)arm64_nop_array; 219 | u_int32_t arm64_ret = *(u_int32_t *)arm64_ret_array; 220 | u_int32_t head = arm64_nop; 221 | u_int32_t end = arm64_ret; 222 | if(*(uint32_t *)begin == arm64_paciasp) { 223 | head = arm64_paciasp; 224 | end = arm64_autiasp; 225 | } 226 | // begin = (void *)((off_t)begin + 4); 227 | orig_len += 4; 228 | while (*(uint32_t *) begin != end) { 229 | orig_len += 4; 230 | // printf("loop once\n"); 231 | begin = (void *) ((off_t) begin + 4); 232 | } 233 | backup_code = (uint8_t *) malloc(orig_len); 234 | memcpy(backup_code, addr, orig_len); 235 | patch_code = (uint8_t *) malloc(orig_len); 236 | uint32_t *tmp = (uint32_t *) patch_code; 237 | tmp[0] = head; 238 | tmp[orig_len / 4 - 1] = end; 239 | for (int i = 1; i < orig_len / 4 - 1; i++) { 240 | tmp[i] = arm64_nop; 241 | } 242 | #endif 243 | 244 | // } else{ 245 | // orig_len = 8; 246 | // backup_code = (uint8_t *) malloc(orig_len); 247 | // patch_code = (uint8_t *) malloc(orig_len); 248 | // memcpy(backup_code,addr,orig_len); 249 | // *(uint32_t*)patch_code = *(uint32_t*)thumb_ret_array; 250 | // } 251 | // int noplen = 0; 252 | // uint32_t ibuf,end; 253 | // end = arm64_ret; 254 | // paciasp 255 | // o 256 | // o 257 | // autiasp 258 | // ret 259 | // while (read(fd,&ibuf,sizeof(ibuf)) == sizeof(ibuf)) 260 | // { 261 | // if(ibuf == arm64_paciasp){ 262 | // end = arm64_autiasp; 263 | // begin+=4; 264 | // continue; 265 | // } 266 | // if(ibuf == end){ 267 | // break; 268 | // } 269 | // noplen++; 270 | // } 271 | // uint32_t *wbuf = (uint32_t*)malloc(noplen*sizeof(uint32_t)); 272 | // for(int i = 0;i 7 | 8 | #define ZYGISK_API_VERSION 3 9 | 10 | /* 11 | 12 | Define a class and inherit zygisk::ModuleBase to implement the functionality of your module. 13 | Use the macro REGISTER_ZYGISK_MODULE(className) to register that class to Zygisk. 14 | 15 | Please note that modules will only be loaded after zygote has forked the child process. 16 | THIS MEANS ALL OF YOUR CODE RUNS IN THE APP/SYSTEM SERVER PROCESS, NOT THE ZYGOTE DAEMON! 17 | 18 | Example code: 19 | 20 | static jint (*orig_logger_entry_max)(JNIEnv *env); 21 | static jint my_logger_entry_max(JNIEnv *env) { return orig_logger_entry_max(env); } 22 | 23 | static void example_handler(int socket) { ... } 24 | 25 | class ExampleModule : public zygisk::ModuleBase { 26 | public: 27 | void onLoad(zygisk::Api *api, JNIEnv *env) override { 28 | this->api = api; 29 | this->env = env; 30 | } 31 | void preAppSpecialize(zygisk::AppSpecializeArgs *args) override { 32 | JNINativeMethod methods[] = { 33 | { "logger_entry_max_payload_native", "()I", (void*) my_logger_entry_max }, 34 | }; 35 | api->hookJniNativeMethods(env, "android/util/Log", methods, 1); 36 | *(void **) &orig_logger_entry_max = methods[0].fnPtr; 37 | } 38 | private: 39 | zygisk::Api *api; 40 | JNIEnv *env; 41 | }; 42 | 43 | REGISTER_ZYGISK_MODULE(ExampleModule) 44 | 45 | REGISTER_ZYGISK_COMPANION(example_handler) 46 | 47 | */ 48 | 49 | namespace zygisk { 50 | 51 | struct Api; 52 | struct AppSpecializeArgs; 53 | struct ServerSpecializeArgs; 54 | 55 | class ModuleBase { 56 | public: 57 | 58 | // This function is called when the module is loaded into the target process. 59 | // A Zygisk API handle will be sent as an argument; call utility functions or interface 60 | // with Zygisk through this handle. 61 | virtual void onLoad([[maybe_unused]] Api *api, [[maybe_unused]] JNIEnv *env) {} 62 | 63 | // This function is called before the app process is specialized. 64 | // At this point, the process just got forked from zygote, but no app specific specialization 65 | // is applied. This means that the process does not have any sandbox restrictions and 66 | // still runs with the same privilege of zygote. 67 | // 68 | // All the arguments that will be sent and used for app specialization is passed as a single 69 | // AppSpecializeArgs object. You can read and overwrite these arguments to change how the app 70 | // process will be specialized. 71 | // 72 | // If you need to run some operations as superuser, you can call Api::connectCompanion() to 73 | // get a socket to do IPC calls with a root companion process. 74 | // See Api::connectCompanion() for more info. 75 | virtual void preAppSpecialize([[maybe_unused]] AppSpecializeArgs *args) {} 76 | 77 | // This function is called after the app process is specialized. 78 | // At this point, the process has all sandbox restrictions enabled for this application. 79 | // This means that this function runs as the same privilege of the app's own code. 80 | virtual void postAppSpecialize([[maybe_unused]] const AppSpecializeArgs *args) {} 81 | 82 | // This function is called before the system server process is specialized. 83 | // See preAppSpecialize(args) for more info. 84 | virtual void preServerSpecialize([[maybe_unused]] ServerSpecializeArgs *args) {} 85 | 86 | // This function is called after the system server process is specialized. 87 | // At this point, the process runs with the privilege of system_server. 88 | virtual void postServerSpecialize([[maybe_unused]] const ServerSpecializeArgs *args) {} 89 | }; 90 | 91 | struct AppSpecializeArgs { 92 | // Required arguments. These arguments are guaranteed to exist on all Android versions. 93 | jint &uid; 94 | jint &gid; 95 | jintArray &gids; 96 | jint &runtime_flags; 97 | jobjectArray &rlimits; 98 | jint &mount_external; 99 | jstring &se_info; 100 | jstring &nice_name; 101 | jstring &instruction_set; 102 | jstring &app_data_dir; 103 | 104 | // Optional arguments. Please check whether the pointer is null before de-referencing 105 | jintArray *const fds_to_ignore; 106 | jboolean *const is_child_zygote; 107 | jboolean *const is_top_app; 108 | jobjectArray *const pkg_data_info_list; 109 | jobjectArray *const whitelisted_data_info_list; 110 | jboolean *const mount_data_dirs; 111 | jboolean *const mount_storage_dirs; 112 | 113 | AppSpecializeArgs() = delete; 114 | }; 115 | 116 | struct ServerSpecializeArgs { 117 | jint &uid; 118 | jint &gid; 119 | jintArray &gids; 120 | jint &runtime_flags; 121 | jlong &permitted_capabilities; 122 | jlong &effective_capabilities; 123 | 124 | ServerSpecializeArgs() = delete; 125 | }; 126 | 127 | namespace internal { 128 | struct api_table; 129 | template void entry_impl(api_table *, JNIEnv *); 130 | } 131 | 132 | // These values are used in Api::setOption(Option) 133 | enum Option : int { 134 | // Force Magisk's denylist unmount routines to run on this process. 135 | // 136 | // Setting this option only makes sense in preAppSpecialize. 137 | // The actual unmounting happens during app process specialization. 138 | // 139 | // Set this option to force all Magisk and modules' files to be unmounted from the 140 | // mount namespace of the process, regardless of the denylist enforcement status. 141 | FORCE_DENYLIST_UNMOUNT = 0, 142 | 143 | // When this option is set, your module's library will be dlclose-ed after post[XXX]Specialize. 144 | // Be aware that after dlclose-ing your module, all of your code will be unmapped from memory. 145 | // YOU MUST NOT ENABLE THIS OPTION AFTER HOOKING ANY FUNCTIONS IN THE PROCESS. 146 | DLCLOSE_MODULE_LIBRARY = 1, 147 | }; 148 | 149 | // Bit masks of the return value of Api::getFlags() 150 | enum StateFlag : uint32_t { 151 | // The user has granted root access to the current process 152 | PROCESS_GRANTED_ROOT = (1u << 0), 153 | 154 | // The current process was added on the denylist 155 | PROCESS_ON_DENYLIST = (1u << 1), 156 | }; 157 | 158 | // All API functions will stop working after post[XXX]Specialize as Zygisk will be unloaded 159 | // from the specialized process afterwards. 160 | struct Api { 161 | 162 | // Connect to a root companion process and get a Unix domain socket for IPC. 163 | // 164 | // This API only works in the pre[XXX]Specialize functions due to SELinux restrictions. 165 | // 166 | // The pre[XXX]Specialize functions run with the same privilege of zygote. 167 | // If you would like to do some operations with superuser permissions, register a handler 168 | // function that would be called in the root process with REGISTER_ZYGISK_COMPANION(func). 169 | // Another good use case for a companion process is that if you want to share some resources 170 | // across multiple processes, hold the resources in the companion process and pass it over. 171 | // 172 | // The root companion process is ABI aware; that is, when calling this function from a 32-bit 173 | // process, you will be connected to a 32-bit companion process, and vice versa for 64-bit. 174 | // 175 | // Returns a file descriptor to a socket that is connected to the socket passed to your 176 | // module's companion request handler. Returns -1 if the connection attempt failed. 177 | int connectCompanion(); 178 | 179 | // Get the file descriptor of the root folder of the current module. 180 | // 181 | // This API only works in the pre[XXX]Specialize functions. 182 | // Accessing the directory returned is only possible in the pre[XXX]Specialize functions 183 | // or in the root companion process (assuming that you sent the fd over the socket). 184 | // Both restrictions are due to SELinux and UID. 185 | // 186 | // Returns -1 if errors occurred. 187 | int getModuleDir(); 188 | 189 | // Set various options for your module. 190 | // Please note that this function accepts one single option at a time. 191 | // Check zygisk::Option for the full list of options available. 192 | void setOption(Option opt); 193 | 194 | // Get information about the current process. 195 | // Returns bitwise-or'd zygisk::StateFlag values. 196 | uint32_t getFlags(); 197 | 198 | // Hook JNI native methods for a class 199 | // 200 | // Lookup all registered JNI native methods and replace it with your own functions. 201 | // The original function pointer will be saved in each JNINativeMethod's fnPtr. 202 | // If no matching class, method name, or signature is found, that specific JNINativeMethod.fnPtr 203 | // will be set to nullptr. 204 | void hookJniNativeMethods(JNIEnv *env, const char *className, JNINativeMethod *methods, int numMethods); 205 | 206 | // For ELFs loaded in memory matching `regex`, replace function `symbol` with `newFunc`. 207 | // If `oldFunc` is not nullptr, the original function pointer will be saved to `oldFunc`. 208 | void pltHookRegister(const char *regex, const char *symbol, void *newFunc, void **oldFunc); 209 | 210 | // For ELFs loaded in memory matching `regex`, exclude hooks registered for `symbol`. 211 | // If `symbol` is nullptr, then all symbols will be excluded. 212 | void pltHookExclude(const char *regex, const char *symbol); 213 | 214 | // Commit all the hooks that was previously registered. 215 | // Returns false if an error occurred. 216 | bool pltHookCommit(); 217 | 218 | private: 219 | internal::api_table *impl; 220 | template friend void internal::entry_impl(internal::api_table *, JNIEnv *); 221 | }; 222 | 223 | // Register a class as a Zygisk module 224 | 225 | #define REGISTER_ZYGISK_MODULE(clazz) \ 226 | void zygisk_module_entry(zygisk::internal::api_table *table, JNIEnv *env) { \ 227 | zygisk::internal::entry_impl(table, env); \ 228 | } 229 | 230 | // Register a root companion request handler function for your module 231 | // 232 | // The function runs in a superuser daemon process and handles a root companion request from 233 | // your module running in a target process. The function has to accept an integer value, 234 | // which is a socket that is connected to the target process. 235 | // See Api::connectCompanion() for more info. 236 | // 237 | // NOTE: the function can run concurrently on multiple threads. 238 | // Be aware of race conditions if you have a globally shared resource. 239 | 240 | #define REGISTER_ZYGISK_COMPANION(func) \ 241 | void zygisk_companion_entry(int client) { func(client); } 242 | 243 | /************************************************************************************ 244 | * All the code after this point is internal code used to interface with Zygisk 245 | * and guarantee ABI stability. You do not have to understand what it is doing. 246 | ************************************************************************************/ 247 | 248 | namespace internal { 249 | 250 | struct module_abi { 251 | long api_version; 252 | ModuleBase *_this; 253 | 254 | void (*preAppSpecialize)(ModuleBase *, AppSpecializeArgs *); 255 | void (*postAppSpecialize)(ModuleBase *, const AppSpecializeArgs *); 256 | void (*preServerSpecialize)(ModuleBase *, ServerSpecializeArgs *); 257 | void (*postServerSpecialize)(ModuleBase *, const ServerSpecializeArgs *); 258 | 259 | module_abi(ModuleBase *module) : api_version(ZYGISK_API_VERSION), _this(module) { 260 | preAppSpecialize = [](auto self, auto args) { self->preAppSpecialize(args); }; 261 | postAppSpecialize = [](auto self, auto args) { self->postAppSpecialize(args); }; 262 | preServerSpecialize = [](auto self, auto args) { self->preServerSpecialize(args); }; 263 | postServerSpecialize = [](auto self, auto args) { self->postServerSpecialize(args); }; 264 | } 265 | }; 266 | 267 | struct api_table { 268 | // These first 2 entries are permanent, shall never change 269 | void *_this; 270 | bool (*registerModule)(api_table *, module_abi *); 271 | 272 | // Utility functions 273 | void (*hookJniNativeMethods)(JNIEnv *, const char *, JNINativeMethod *, int); 274 | void (*pltHookRegister)(const char *, const char *, void *, void **); 275 | void (*pltHookExclude)(const char *, const char *); 276 | bool (*pltHookCommit)(); 277 | 278 | // Zygisk functions 279 | int (*connectCompanion)(void * /* _this */); 280 | void (*setOption)(void * /* _this */, Option); 281 | int (*getModuleDir)(void * /* _this */); 282 | uint32_t (*getFlags)(void * /* _this */); 283 | }; 284 | 285 | template 286 | void entry_impl(api_table *table, JNIEnv *env) { 287 | ModuleBase *module = new T(); 288 | if (!table->registerModule(table, new module_abi(module))) 289 | return; 290 | auto api = new Api(); 291 | api->impl = table; 292 | module->onLoad(api, env); 293 | } 294 | 295 | } // namespace internal 296 | 297 | inline int Api::connectCompanion() { 298 | return impl->connectCompanion ? impl->connectCompanion(impl->_this) : -1; 299 | } 300 | inline int Api::getModuleDir() { 301 | return impl->getModuleDir ? impl->getModuleDir(impl->_this) : -1; 302 | } 303 | inline void Api::setOption(Option opt) { 304 | if (impl->setOption) impl->setOption(impl->_this, opt); 305 | } 306 | inline uint32_t Api::getFlags() { 307 | return impl->getFlags ? impl->getFlags(impl->_this) : 0; 308 | } 309 | inline void Api::hookJniNativeMethods(JNIEnv *env, const char *className, JNINativeMethod *methods, int numMethods) { 310 | if (impl->hookJniNativeMethods) impl->hookJniNativeMethods(env, className, methods, numMethods); 311 | } 312 | inline void Api::pltHookRegister(const char *regex, const char *symbol, void *newFunc, void **oldFunc) { 313 | if (impl->pltHookRegister) impl->pltHookRegister(regex, symbol, newFunc, oldFunc); 314 | } 315 | inline void Api::pltHookExclude(const char *regex, const char *symbol) { 316 | if (impl->pltHookExclude) impl->pltHookExclude(regex, symbol); 317 | } 318 | inline bool Api::pltHookCommit() { 319 | return impl->pltHookCommit != nullptr && impl->pltHookCommit(); 320 | } 321 | 322 | } // namespace zygisk 323 | 324 | [[gnu::visibility("default")]] [[gnu::used]] 325 | extern "C" void zygisk_module_entry(zygisk::internal::api_table *, JNIEnv *); 326 | 327 | [[gnu::visibility("default")]] [[gnu::used]] 328 | extern "C" void zygisk_companion_entry(int); 329 | -------------------------------------------------------------------------------- /module/src/main/AndroidManifest.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | -------------------------------------------------------------------------------- /settings.gradle: -------------------------------------------------------------------------------- 1 | dependencyResolutionManagement { 2 | repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS) 3 | repositories { 4 | google() 5 | mavenCentral() 6 | } 7 | } 8 | include ':module' 9 | --------------------------------------------------------------------------------