Small frida module for ensuring you get the stack information you wanted.
Often when using Frida, I would run into issues with wanting specific stack traces. Then I realized I didn't have a specific context window, or the stack traces didn't contain the correct shared libraries in them. This resulted in me re-writing the same functions all the time.
In other instances, mostly when reverse engineering heavily obfuscated or packed code, I would have discovered functions or places in memory which had been created without any exports available. This would lead to questions like, what process/library owned this? Where am I inside those libraries?
To answer the above questions, I wrapped some of the standard Thread.Backtrace functions
and added some scanning of the Process memory ranges.
$ npm install frida-extended-stackimport { Stack } from 'frida-stack'
function hook_exit() {
const _exitPtr = Module.findExportByName('libc.so', '_exit');
if (_exitPtr) {
const _exit = new NativeFunction(_exitPtr, 'int', ['int']);
Interceptor.replace(
_exitPtr,
new NativeCallback(
function (status) {
console.log(`[+] _exit : ${status} from ${Stack.getModuleInfo(this.context.pc)}`);
console.log(Stack.native(this.context)
return _exit(status);
},
'int',
['int'],
),
);
}
}Output:
[Pixel 4::com.example.package ]-> [+] _exit : 0 from 0x7713d25000 libexamplesharedlib.so:0x1aae8
0x7713d25000 libexamplesharedlib.so:0x1aae8
Now you have a library and the exact offset into the library for reversing.
Copyright 2020-2024 Tim 'diff' Strazzere <diff@protonmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
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