modifyELF

修改Android lib***.so（ELF）文件的函数名和hash

文件说明

modify.c 修改so文件（ELF文件）方法对应的hash

readsymbol.c   取并打印so文件内的symbol

libtest/modify     modify.c编译后的文件（编译环境OS X，需要在其他环境执行的可以用源码重新编译）

libtest/readsymbol readsymbol.c编译后的文件（编译环境OS X，需要在其他环境执行的可以用源码重新编译）

libtest/libxlog.so  用于测试的so文件

使用方式

先使用readsymbol打印so文件内所有的函数名：

readsymbol libxlog.so

打印结果：

Java_com_tendk01_mm_xlog_LogLogicJni_initLogInfo
Java_com_tendk01_mm_xlog_LogLogicJni_setIsAlphaVersion
Java_com_tendk01_mm_xlog_LogLogicJni_getLogLevelFromCfg
Java_com_tendk01_mm_xlog_LogLogicJni_getIPxxLogLevel
Java_com_tendk01_mm_xlog_LogLogicJni_getAppenderModeFromCfg
Java_com_tendk01_mm_xlog_LogLogicJni_setIPxxLogML
Java_com_tendk01_mm_xlog_LogLogicJni_setConsoleLogOpen
Java_com_tendk01_mm_xlog_LogLogicJni_setErrLogOpen
Java_com_tendk01_mm_xlog_Xlog_onCreate
Java_com_tendk01_mm_xlog_Xlog_appenderOpen
Java_com_tendk01_mm_xlog_Xlog_appenderClose
Java_com_tendk01_mm_xlog_Xlog_appenderFlush
Java_com_tendk01_mm_xlog_Xlog_logWrite
Java_com_tendk01_mm_xlog_Xlog_logWrite2
Java_com_tendk01_mm_xlog_Xlog_getLogLevel
Java_com_tendk01_mm_xlog_Xlog_setLogLevel
Java_com_tendk01_mm_xlog_Xlog_setAppenderMode

然后使用modify修改函数名的hash

./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_initLogInfo Java_com_tendk01_mm_xlog_LogLogicJni_initLogInfo
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_setIsAlphaVersion Java_com_tendk01_mm_xlog_LogLogicJni_setIsAlphaVersion
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_getLogLevelFromCfg Java_com_tendk01_mm_xlog_LogLogicJni_getLogLevelFromCfg
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_getIPxxLogLevel Java_com_tendk01_mm_xlog_LogLogicJni_getIPxxLogLevel
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_getAppenderModeFromCfg Java_com_tendk01_mm_xlog_LogLogicJni_getAppenderModeFromCfg
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_setIPxxLogML Java_com_tendk01_mm_xlog_LogLogicJni_setIPxxLogML
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_setConsoleLogOpen Java_com_tendk01_mm_xlog_LogLogicJni_setConsoleLogOpen
./modify libxlog.so Java_com_tencent_mm_xlog_LogLogicJni_setErrLogOpen Java_com_tendk01_mm_xlog_LogLogicJni_setErrLogOpen
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_onCreate Java_com_tendk01_mm_xlog_Xlog_onCreate
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_appenderOpen Java_com_tendk01_mm_xlog_Xlog_appenderOpen
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_appenderClose Java_com_tendk01_mm_xlog_Xlog_appenderClose
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_appenderFlush Java_com_tendk01_mm_xlog_Xlog_appenderFlush
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_logWrite Java_com_tendk01_mm_xlog_Xlog_logWrite
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_logWrite2 Java_com_tendk01_mm_xlog_Xlog_logWrite2
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_getLogLevel Java_com_tendk01_mm_xlog_Xlog_getLogLevel
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_setLogLevel Java_com_tendk01_mm_xlog_Xlog_setLogLevel
./modify libxlog.so Java_com_tencent_mm_xlog_Xlog_setAppenderMode Java_com_tendk01_mm_xlog_Xlog_setAppenderMode

完成。