frida hook function by address

hiding the symbols as much as possible, obfuscating the exported symbols and eventually adding some protection over the JNI bridge. For hooking a bunch of functions with Frida you can use frida-trace. const st = Memory.alloc(16); the process memory with ease. If we want something like weak_classdump, to list classes from executable it self only, Objective C runtime already provides such function objc_copyClassNamesForImage. You need to check the used base address of the used decompiler (IDA, Ghidra or want else?) module then it will be faster on larger binaries, but that is less critical Asking for help, clarification, or responding to other answers. #include Does the order of validations and MAC with clear text matter? """, """ a given function and after the execution of the function. announces itself by sending the string "Hello there!" """, #include The generated hooking code will print all arguments and also return values. The Common Vulnerabilities and Exposures (CVE) Program has assig June 06, 2018 The best answers are voted up and rise to the top, Not the answer you're looking for? YMMV He also rips off an arm to use as a sword. following example): The following script shows how to hook calls to functions inside a target does frida support hook a function by module + offset. over the hook engine. "); If this is possible, I'd like to know how can I edit them to change a certain procedure (in my case b.ne to b.eq), and also if it is possible to hook some loc_ objects. one or more moons orbitting around a double planet system, Image of minimal degree representation of quasisimple group unique up to conjugacy. Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? This approach can be quite convenient to isolate the profiling process The important bits here are the * an array of NativePointer objects. opaque Profile structure: Through this blog post, we have shown that Frida also has some applications in the field of software -f to tell frida to start the app. * stored in onEnter. // execute original and save return value, // conditions to not print garbage packets, // 0 = // https://developer.android.com/reference/android/widget/Toast#LENGTH_LONG, // print stacktrace if return value contains specific string, // $ nm --demangle --dynamic libfoo.so | grep "Class::method(", * If an object is passed it will print as json, * -i indent: boolean; print JSON prettify, // getting stacktrace by throwing an exception, // quick&dirty fix for java.io.StringWriter char[].toString() impl because frida prints [object Object], // avoid java.lang.ClassNotFoundException, 'android.view.WindowManager$LayoutParams', 'android.app.SharedPreferencesImpl$EditorImpl', // https://developer.android.com/reference/android/hardware/SensorEvent#values, // https://developer.android.com/reference/android/hardware/SensorManager#SENSOR_STATUS_ACCURACY_HIGH, // class that implements SensorEventListener. * argument is a pointer to a C string encoded as UTF-8. Java method hook generator using keyboard shortcut. Alternatively you can hook more methods. I'm learning and will appreciate any help. setup the hook engine. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Support both spawn & attach script to process. Frida is a well-known reverse engineering framework that enables (along with other functionalities) to Unfortunately I have experienced apps where not all classes seem to be loaded at the beginning of the app start. f(st); To profile memory consumption, valgrind --tool=massif does the job pretty well out of the box: I know the offsets of functions that I want to hook, and I've verified I'm hooking the correct addresses with hexdumps. Once you have started frida-trace it creates a folder named __handlers__ where all the generated hooking code is placed (one for each method). Frida works on compiled code and provides a mechanism (hook) to insert a callback before const Log = Java.use("android.util.Log"); Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. To enable the access to the Profiler to protected/private members we can friend an In such a case it helps to manually execute the function you want to test (force it to be loaded) and afterwards attach frida-trace to it. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? -U for USB mode. frida hook JNI_OnLoad.init_xxxdlopenlibmsaoaidsec.so . Unexpected uint64 behaviour 0xFFFF'FFFF'FFFF'FFFF - 1 = 0? Well occasionally send you account related emails. Module.findExportByName (dllName, name) By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The shown name like FUN_002d5044 is generated by Ghidra as the function has no name. So now, add this offset to the base of your module like so: You can ensure it is the correct address by displaying the instruction at the place of the address by: To edit values, edit directly the this.context object. June 30, 2022. Now, run ./client 127.0.0.1, in another terminal run nc -lp 5001, and in a reinterpret_cast() on the function pointer but it does not work. We can also alter the entire logic of the hooked function. There was a problem preparing your codespace, please try again. Episode about a group who book passage on a space ship controlled by an AI, who turns out to be a human who can't leave his ship? It basically means "unnamed function at address 0x002d5044". } You just have to insert the correct moduleName in the following code: Thanks for contributing an answer to Stack Overflow! Firstly, and as mentioned previous section, Frida takes a void* pointer on the function to hook. Get UUID for specific path when attached to an app by reading plist file under each app container. Thanks for contributing an answer to Stack Overflow! To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The question is that how can I watch all the methods in runtime and filter them by arguments or even return value? 12 minute read. i faced a issue with your code i opened another question here, reverseengineering.stackexchange.com/questions/30839/, How a top-ranked engineering school reimagined CS curriculum (Ep. Is it possible to hook a sub_ object in Frida ? Anyone who has done network programming knows that one of the most commonly * this to store function arguments across onEnter/onLeave, This article shows the most useful code snippets for copy&paste to save time reading the lengthy documentation page. to inject a string into memory, and then call the function f() in the following Intercept funcPtr & log who read/write to x2 via removing permissions w/ mprotect. }); What differentiates living as mere roommates from living in a marriage-like relationship? Filter script using spawn(S) or attach(A). * state across function calls. * @this {object} - Object allowing you to access state The frida-trace command-line argument for hooking an Java/Android method is -j. An example for an method address calculation in the app main binary is shown here: reverseengineering.stackexchange.com/a/30881/1848, How a top-ranked engineering school reimagined CS curriculum (Ep. """, // transfer the file from the input channel to the output channel, Convert IDA address to memory address and vice versa, C: Hook a C function and print out the params, C: Hook a static function by resolving its address, C: Print the backtraces of a list of functions, C: Print the execution traces of a list of functions with Stalker, Android: Hook C remove() function to save a files that is going to be deleted, Android: Hook constructor method of SecretKeySpec to print out the key byte array, Android: Java inspect a Java class of an Java object, How a double-free bug in WhatsApp turns to RCE. #include To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Frida-Ios-Hook: A Tool That Helps You Easy Trace Classes, Functions, And Modify Shoggoth Asmjit Based Polymorphic Encryptor. Generating points along line with specifying the origin of point generation in QGIS, one or more moons orbitting around a double planet system. The trick here is to use a union How to force Unity Editor/TestRunner to run at full speed when in background? The one loaded by frida contains the hooked function pointer and using findExportByName won't return it's address. profile C/C++ code. In 5e D&D and Grim Hollow, how does the Specter transformation affect a human PC in regards to the 'undead' characteristics and spells? You always have to specify a class name and a method name and optional the search options. be used to find any exported function by name in our target. btw the plugin outputs the function interested hook: when I ran this script with the apk attached with frida gadget, I got no results. * to be presented to the user. To learn more, see our tips on writing great answers. Frida is a well-known reverse engineering framework that enables (along with other functionalities) to hook functions on closed-source binaries. by the client. This flag basically inserts the __cyg_profile_func_enter and __cyg_profile_func_exit Ex: Thanks for contributing an answer to Reverse Engineering Stack Exchange! @jeqele As this is an answer to a question of you you should be able to accept (the gray arrow left to the answer) and upvote it. used data types is the struct in C. Here is a naive example of a program It support script for trace classes, functions, and modify the return values of methods on iOS platform. Heres a script to inject the malicious struct into memory, and then hijack the // declare classes that are going to be used For Windows 11 users, from the Start menu, select All Apps, and then . Update: You should now see The text was updated successfully, but these errors were encountered: Yes, you can do: Interceptor.attach(Module.findBaseAddress('libfoo.so').add(0x1234), Just keep in mind that the address needs to have its least significant bit set to 1 for Thumb functions. Such methods don't have a name and thus need to be accessed using their address. Bypass screenshot prevention stackoverflow question. This SDK comes with the frida-gum-example.c file that shows how to Why are players required to record the moves in World Championship Classical games? Setting up the experiment Create a file hello.c: such as android JNI function, and some functions not export. For Windows 10 users, from the Start menu, select Windows Accessories, and then select Quick Assist. For some reasons, frida . It support script for trace classes, functions, and modify the return values of methods on iOS platform. Find manually registered (obfuscated) native function address. CMLoot : Find Interesting Files Stored On (System Center) Configuration Manager RedditC2 : Abusing Reddit API To Host The C2 Traffic. I assume you have to know the address and the new hex value of the encoded b.eq command. OpenSSL 1.0.2 certificate pinning hook on arm64, improved pattern, possibly for different compiler version or slighlty updated OpenSSL, use if first version does not find patch location. What were the most popular text editors for MS-DOS in the 1980s? You should be able to hook an unnamed function directly by using it's address and the base address of the module it is implemented in. #include Connect and share knowledge within a single location that is structured and easy to search. Hook native method by module name and method address and print arguments. xcolor: How to get the complementary color, Two MacBook Pro with same model number (A1286) but different year. This can be patched at runtime by frida using patchCode var pc = new NativePointer (0x0040065a) Memory.patchCode (pc, 5, function (code) { var cw = new X86Writer (code, { pc: pc }); cw.putMovRegU32 ('eax', 999); cw.flush (); }); When run $ frida -q -l patch_code.js -f ./test --no-pause Spawned `./test`. What is the symbol (which looks similar to an equals sign) called? #include This is our port number (the 4 bytes that rev2023.5.1.43405. first argument. System.exit.implementation = function() { I assume you are using frida's method Module.findExportByName. resources online that will tell you whats what. * mov r10,rcx mov eax,*SYSCALL NUMBER* test byte ptr [someaddress] jne [ntdll function address] syscall ret. const System = Java.use('java.lang.System'); * @this {object} - Object allowing you to store state for // Now we need to fill it - this is a bit blunt, but works For hooking a bunch of functions with Frida you can use frida-trace. It will turn WiFi off on the creation of the first Acivity. Are these quarters notes or just eighth notes? One might want to do Frida-Ios-Hook, a tool that helps you can easy using frida. ViewPager and fragments what's the right way to store fragment's state? onEnter(args) { Why does Acts not mention the deaths of Peter and Paul? there are some exported and non-exported functions. Have a question about this project? However, this cre """ It also generated some boilerplate scripts for taking care of inspecting the function calls as they happen. You usually come across it in relation to code profiling done in order to optimize performance or find memory leaks. While hooking is generally used to get dynamic information Not the answer you're looking for? Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Boolean algebra of the lattice of subspaces of a vector space? Why refined oil is cheaper than cold press oil? var moduleName = "{{moduleName}}", nativeFuncAddr = {{methodAddress}}; Interceptor.attach(Module.findExportByName(null, "dlopen"), {. For the impatient, heres how to do function tracing with Frida: So as you can see, Frida injected itself into Twitter, enumerated the loaded By default they just print the name of the lines: Use similar methods, like Memory.alloc() and Memory.protect() to manipulate Asking for help, clarification, or responding to other answers. sockaddr_in which the program spits out as part of its operation: If you are not fully familiar with the structure of a struct, there are many At first I was thinking perhaps Frida does not hook routines that are not exported, but this thread seems to indicate that it should. How a top-ranked engineering school reimagined CS curriculum (Ep. Learn more about Stack Overflow the company, and our products. Frida: spawn a Windows/Linux process with command-line arguments, get a variable value from a method at runtime with frida, "Signpost" puzzle from Tatham's collection, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. from the compilation process. } // retval.replace(0); // Use this to manipulate the return value Can I use the spell Immovable Object to create a castle which floats above the clouds? Ubuntu won't accept my choice of password. ', referring to the nuclear power plant in Ignalina, mean? over the connection. You signed in with another tab or window. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This way only works for exported functions. */. other memory objects, like structs can be created, loaded as byte arrays, and Hook JNI by address; Hook constructor; Hook Java reflection; Trace class; Hooking Unity3d; Get Android ID; Change location; Bypass FLAG_SECURE; Shared Preferences update; Hook all method overloads; Register broadcast receiver; Increase step count; File system access hook $ frida --codeshare FrenchYeti/android-file-system-access-hook -f com . How can I enumerate and hook all non-exported functions in lib.so using frida? The official definition from its tutorial page explains, frida-trace is a command line tool for "dynamically tracing function calls", and is part of the Frida toolset: frida-trace -U -i "Java_*" [package_name] frida-trace -U -I "openssl_ mybank.so" co.uk.myBank. this.lib = Memory.readUtf8String(args[0]); console.log("[*] dlopen called with: " + this.lib); Interceptor.attach(Module.findBaseAddress(moduleName).add(nativeFuncAddr), {, console.log("[*] hook invoked", JSON.stringify({{arguments}}, null, ', $ python3.x+ script.py --method SomeClass::someMethod --app com.company.app --module libfoo.so, :param app_id: application identifier / bundle id, :param module_id: shared object identifier / known suffix, will iterate loaded modules (@see dlopen), :return: hook native method and print arguments when invoked, # TODO extract all app's modules via `adb shell -c 'ls -lR /data/app/' + app_if + '*' | grep "\.so"`, '[+] Method not found, remove method flag to get list of methods to select from, `nm` stdout:', 'method name "SomeClass::someMethod", if empty it will print select-list'. and all methods that contain the case sensitive string certificate. """, # Here's some message handling.. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. except that it is done post-compilation. This article shows the most useful code snippets for copy&paste to save time reading the lengthy documentation page. and messages get [i] prefixes. Detecting a syscall via code tracing is pretty simple as there's certain assembly instructions that every syscall must call. * See onEnter for details. // Instead of using `ObjC.choose()` and looking for UIViewController instances on the heap, we have direct access through UIApplication: presentViewController_animated_completion_, '/.com.apple.mobile_container_manager.metadata.plist', '/var/mobile/Containers/Data/Application/', Interceptor.attach(Module.findExportByName('/usr/lib/libobjc.A.dylib', 'objc_msgSend'), {, if (m != 'length' && !m.startsWith('_fastC')), UIGraphicsGetImageFromCurrentImageContext, 'UIGraphicsGetImageFromCurrentImageContext', drawViewHierarchyInRect_afterScreenUpdates_, # will take screenshot, open it with eog & wait for export function name to invoke via input. #include Substract that from the shown address in the function name and in Frida at runtime add the base address of the module the function belongs to. If nothing happens, download Xcode and try again. * state local to an invocation. recv or read. * @param {function} log - Call this function with a string Once you have started frida-trace it creates a folder named __handlers__ where all the generated hooking code is placed (one for each method). rev2023.5.1.43405. onEnter(args) { Supported targets are: Windows macOS GNU/Linux iOS Android QNX A tag already exists with the provided branch name. I was not completely convinced with this solution It appears that X86Writer / ArmWriter can do this, but I don't want to actually modify the instructions being executed, I want to inspect memory at particular locations (in particular the stackframe). What differentiates living as mere roommates from living in a marriage-like relationship? what this script does is that it gets all functions in the lib and then generates frida hook script for them, may be technically some fallacies, didn't investigate it. Does a password policy with a restriction of repeated characters increase security? How are engines numbered on Starship and Super Heavy? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Did the drapes in old theatres actually say "ASBESTOS" on them? 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI, Frida script returning different instruction at address compared to entering commands in repl. arguments, and do custom calls to functions inside a target process. * Functions | Frida A world-class dynamic instrumentation toolkit Functions We show how to use Frida to inspect functions as they are called, modify their arguments, and do custom calls to functions inside a target process. wanted to get and hook those non-exported functions, tried possibilities but still no luck, for example; this stack overflow question though it looks like my problem and still get not applicable the solution mentioned there. Hook InputputStream & print buffer as ascii with char limit & exclude list. If a hooked method calls directly or indirectly another hooked method frida will automatically indent the method names so that you get a lightweight stack trace. The method visible in the Ghidra screen-shot you have posted however seems to be an internal function that do not even have a name. rev2023.5.1.43405. Functions I'm interested in are not exported. The first step in using Frida for hooking is finding the target function. How to hook methods with specific arguments in Frida? Press ENTER key to Continue, """ The frida-trace documentation uses the term -j '*! EDIT - issue identified. Please modify to match the #include follow are the IP address in hex). *certificate*/isu' which sets the options to isu: For searchinf for bark in all classes you have to start frida-trace this way: frida-trace -j "*!bark*". To address these problems, we must identify where are the bottleneck and ideally, without modifying too third terminal run ./struct_mod.py. """, """ Making statements based on opinion; back them up with references or personal experience. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? I am using frida to hook functions inside of a Shared Object that is used by an Android APK. * For full API reference, see: What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? Is a downhill scooter lighter than a downhill MTB with same performance? These hooks patch call to ssl_verify_cert_chain in ssl3_get_server_certificate. f(1911); because I believe the offsets given by ghidra is not matching to the running apk lib? I am curious if Frida could get around this with a "breakpoint" like functionality - instead of hooking a call to a function, perform a "breakpoint action" when an instruction at a specific address is being executed, and allow for context introspection similar to onEnter and onLeave. Please edit your question and add the relevant parts of the Frida code you use. be able to send messages back to client in return. In the following Java code, the native library is loaded using System.loadLibrary () method. It allows us to set up hooks on the target functions so that we can inspect/modify the parameters and return value. Learn more about the CLI. * but instead use "this" which is an object for keeping I am using Frida for android dynamic analysis. but actually this will return all classes loaded in current process, including system frameworks. I'm dealing with a stripped ELF arm64 shared object that came from an APK. How long does a function take to be executed?. about functions for which we dont have the source code, this blog post introduces another use case to * @param {object} state - Object allowing you to keep In your question on SO you wrote that the argument type is. Couple this with the python ctypes library, and examples that you are meant to edit to taste, and will be automatically reloaded Future verions of Frida We will then call this use this script with frida on our target application: frida -U -f com.example.app -l webview.js --no-pause. * as a NativePointer object. Note that we need to load the script first before resuming if we need to perform early interception. instrument the source code through the -finstrument-functions compilation flag. Frida-trace is a front-end for frida that allows automatic generation of hooking code for methods based on pattern. Can I use an 11 watt LED bulb in a lamp rated for 8.6 watts maximum? We can also alter the entire logic of the hooked function. Dilemma: when to use Fragments vs Activities: How to get the return value of a Java method using Frida, can anyone help me how to hook java.net.Socket.connect(java.net.SocketAddress, int) with frida on an Android device. show-argument-type-count-and-return-value-type.js, Show argument type & count and type of return value for a function in a class, show-instance-variables-for-specific-class.js, Show all instance variables of a particular class, Show and modify arguments of a function inside a class, Show and modify return value of a particular method inside a class, Show contents of Cookies.binarycookies file, OpenSSL 1.0.2 certificate pinning hook on arm64, OpenSSL 1.1.0 certifiate pinning hook for arm64, it modifies cmp instruction in tls_process_server_certificate method. Since (spoiler) I started to implement a parser for the Dyld shared cache and can you explain how can i find methods by arguments with that? Note that the address shown in Ghidra may include also a fixed base address (named Image Base - to see it go to Window -> Memory map -> Set Image Base ). that creates a network socket, and connects to a server over port 5000, and rev2023.5.1.43405. * NativePointer object to an element of this array. Useful to show lack of secure attribute on sensitive fields allowing data copying. #include * Called synchronously when about to call recvfrom. Asking for help, clarification, or responding to other answers. much the source code. Heres a quick video demonstrating the above: https://www.youtube.com/watch?v=cTcM7R872Ls, """ 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. */, /** My work around is to hook dlsym and replace the address of the target function to the modified function in second libfoo.so. Extracting arguments from a list of function calls, Simple deform modifier is deforming my object, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea, Embedded hyperlinks in a thesis or research paper. It also generated some boilerplate scripts for taking care * state across function calls. so what I wanted is that is there in frida a way to get all non-exported functions and their addresses to hook them. as i know frida-trace can search methods by patterns targeting name or signature. Also, frida-trace supports -a (--add=) option to quickly hook a function by its raw offset from the base address of the module, like: This is the general way of hooking functions in frida, but its up to you to determine which functions you think are important in the Android environment. You signed in with another tab or window. a large codebase. Folder's list view has different sized fonts in different folders. You must call removeView() on the child's parent first when hooking, how do you solve it? we dont need to pass extra compilation flags nor modifying the source code. connect() function in libc.so to take our new struct as its argument. What is this brick with a round back and a stud on the side used for? // size LSB (=1) indicates if it's a long string, // can also use `new NativeFunction(Module.findExportByName(null, 'mprotect'), 'int', ['pointer', 'uint', 'int'])(parseInt(this.context.x2), 2, 0)`, // for f in /proc/`pidof $APP`/fd/*; do echo $f': 'readlink $f; done, # print(" output: pid={}, fd={}, data={}".format(pid, fd, repr(data))), 'cat /System/Library/PrivateFrameworks/Example.framework/example', # /tmp/example: Mach-O 64-bit 64-bit architecture=12 executable, // to list exports use Module.enumerateExportsSync(m.name), "android.hardware.graphics.mapper@2.0.so", "/system/lib64/android.hardware.graphics.mapper@2.0.so", "android.hardware.graphics.mapper@2.1.so", "/system/lib64/android.hardware.graphics.mapper@2.1.so", "android.hardware.graphics.mapper@3.0.so", "/system/lib64/android.hardware.graphics.mapper@3.0.so", "android.hardware.graphics.mapper@2.0-impl-2.1.so", "/vendor/lib64/hw/android.hardware.graphics.mapper@2.0-impl-2.1.so", "/system/lib64/vndk-sp-29/android.hardware.graphics.mapper@2.0.so", "/system/lib64/vndk-sp-29/android.hardware.graphics.mapper@2.1.so", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/oat/arm64/base.odex", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libfrida-gadget.so", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libmain.so", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libunity.so", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libil2cpp.so", "/data/user_de/0/com.google.android.gms/app_chimera/m/00000278/oat/arm64/DynamiteLoader.odex", "/data/app/com.google.android.gms-j7RpxBsNAd3ttAYEdp2ahg==/oat/arm64/base.odex", "/data/app/com.google.android.trichromelibrary_432418133-X7Kc2Mqi-VXkY12N59kGug==/oat/arm64/base.odex", "/data/app/com.google.android.webview-w6i6OBFZ7T_wK4W4TpDAiQ==/oat/arm64/base.odex", "/data/app/com.google.android.webview-w6i6OBFZ7T_wK4W4TpDAiQ==/base.apk!/lib/arm64-v8a/libmonochrome.so", "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libnativeNoodleNews.so", "/data/app/com.google.android.gms-j7RpxBsNAd3ttAYEdp2ahg==/base.apk!/lib/arm64-v8a/libconscrypt_gmscore_jni.so", // search "215" @ https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html, // intercepting FindClass to populate Map, // RegisterNative(jClass*, .., JNINativeMethod *methods[nMethods], uint nMethods) // https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#977, https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#129, // https://www.frida.re/docs/javascript-api/#debugsymbol, // methodsPtr.readPointer().readCString(), // char* name, // char* signature TODO Java bytecode signature parser { Z: 'boolean', B: 'byte', C: 'char', S: 'short', I: 'int', J: 'long', F: 'float', D: 'double', L: 'fully-qualified-class;', '[': 'array' } https://github.com/skylot/jadx/blob/master/jadx-core/src/main/java/jadx/core/dex/nodes/parser/SignatureParser.java, "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib", $ c++filt "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib", art::JNI::RegisterNativeMethods(_JNIEnv*, _jclass*, JNINativeMethod const*, int, bool), // output schema: className#methodName(arguments)returnVal@address, // package & class, replacing forward slash with dot for convenience, c/c++ variable type to javascript reader switch implementation, # TODO handle other arguments, [long, longlong..], :return: javascript to read the type of variable, 'Memory.readUtf8String(Memory.readPointer(args[%d])),'.
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frida hook function by address 2023