Android Tutorial How to connect GDB to your rooted Android device

Infamous-Ash · March 1, 2017

Note: This is for testing. Gcore and watchpoint may work or not work. gdbserver won't work with emulators because they are emulating network that a computer can't access it directly.

I will make a tutorial about compiling GDB for all platforms for peoples who want to try fixing gcore.

Tested on Android 4.4.4 and 5.1.1 and it works

Requirements:

A rooted device

Android 4.x.x-6.x.x (marshmallow is untested)

Terminal app

Downloads:

GDB server by Google (Android NDK 11c March 2016)

Check your device's Kernel architecture before adding gdbserver!

You can check it using GPU-Z and go to "SYSTEM" tab to see your kernel architecture

https://play.google.com/store/apps/details?id=com.cpuid.cpu_z&hl=en

android-arm gdbserver

android-arm64 gdbserver

android-mips gdbserver

android-mips64 gdbserver

android-x86 gdbserver

android-x86_64 gdbserver

GDB v7.11 by Google (Android NDK 11c March 2016)

windows-x86_64 gdb

linux-x86_64 gdb

darwin-x86_64 gdb (Mac OS X)

GDB v7.11 by iAndroHacker (target: arm-linux-androideabi)

windows-x86_64 gdb

(gcore: have "g" packet error)

darwin-x86_64 (Mac OS X)

(gcore: working but slow to save)

linux-x86_64 (coming)

Other

GDB 7.4.1 by SysProgs

(stable)

How to download the file?

On your Android device, open Xplore, open confuguration and enable root access

Copy the file gdbserver to /system/bin

Open the Terminal app, input:

Code (Text):

su

and hit enter. input

Code (Text):

dumpsys meminfo

and hit enter to show all the processes.

pick one of the process you want to attach and input

Code (Text):

gdbserver :<port> --attach <pid>

Replacing <pid> with the PID number and <port> with the port number. you can put any ports from range 0-65536 but make sure that the port you input is not in use

Hit enter and the gdbserver will attach the process and listen to the port

Open Wi-Fi settings and check your local IP

On Linux/Mac OS X, open the "gdb" file

On Windows, open the "gdb.exe" file

input:

Code (Text):

target remote 192.168.1.25:1234

to connect to your device

That's all. Now you can use GDB remotely

Credit:

iAndroHacker

Crypto · March 1, 2017

Wow nice!

Joka · March 1, 2017

Naeemjr · March 1, 2017

Nice

Infamous-Ash · March 1, 2017

I will be editing the topic tommrow .Just wait.

Need to add some more info and codes instead of black ones

fahadxmb · March 1, 2017

You have to connect it remotely to as it wont support some so for that type in tcp tcp: port port(port number)

And then target remote ip address:port

And this will work on 2 or 3 devices like nexus 9 and nexus 8 with exception of watchpoints like you can only use breakpoints not all and maybe it supports any other devices to make it support to other devices like note 3 you will have to convert it with adb and forward the port .

Infamous-Ash · March 1, 2017

You have to connect it remotely to as it wont support some so for that type in tcp tcp: port port(port number)

And then target remote ip address:port

And this will work on 2 or 3 devices like nexus 9 and nexus 8 with exception of watchpoints like you can only use breakpoints not all and maybe it supports any other devices to make it support to other devices like note 3 you will have to convert it with adb and forward the port .

I am gonna add it tommrow saw it in the comments u know what i mean in a... .

fahadxmb · March 1, 2017

I am gonna add it tommrow saw it in the comments u know what i mean in a... .

Thats all i know ik some more about breakpoints with it like how to support it with other devices using gcore and dumping lib file of the game then removing syscall from it ik you got shocked but there is syscall in android also removing it will support all the breakpoints so.. cannot say more here.

And do u have the permission to share iAndroidhacker tuts or i shall asko him bout that?

Infamous-Ash · March 1, 2017

Thats all i know ik some more about breakpoints with it like how to support it with other devices using gcore and dumping lib file of the game then removing syscall from it ik you got shocked but there is syscall in android also removing it will support all the breakpoints so.. cannot say more here.And do u have the permission to share iAndroidhacker tuts or i shall asko him bout that?

I do