Help/Support Help with IDA Pro - How do I modify & test a function?

[cybergeisha 148 iPhone 11 14.0]

I'm a n00b/beginner, so I'm sorry if this is a dumb question. I have IDA Pro 7.0 (Windows) and I can't figure out how to modify a function. I already tried all the edit options and patch (assembler), but it doesn't work. Can someone guide me on what I'm doing wrong or I just simply can't edit it? I'm trying to edit a function so I can extract the offset and then try it out on the live offset patcher.

Updated July 30, 2022 by cybergeisha
Grammar

[Rook 541.9k iPad Pro (2nd gen) 17.4 Donor]

There are a few ways to test the function you're trying to modify:

1. The easiest being Live Offset Patcher - this is highly recommended if you're a newbie, but it does have its limitations. Currently if your game is using UnityFramework, LOP won't support it. An update for this is being worked on.
2. Hex editing the binary and placing the modded binary into the app replacing the original
3. Compiling a .deb with the function(s) you're testing.
4. Via LLDB

[busmanl30 166 iPhone Xs Max 14.6]

35 minutes ago, Rook said:

There are a few ways to test the function you're trying to modify:

1. The easiest being Live Offset Patcher - this is highly recommended if you're a newbie, but it does have its limitations. Currently if your game is using UnityFramework, LOP won't support it. An update for this is being worked on.
2. Hex editing the binary and placing the modded binary into the app replacing the original
3. Compiling a .deb with the function(s) you're testing.
4. Via LLDB

I think with this you should have setting built in to the preference loader to support this

[cybergeisha 148 iPhone 11 14.0]

Thank you so much for the replies! I actually figured out all of this like two hours after I submitted it, and I didn't know how to cancel! I didn't need to modify anything on IDA, I just had to find the right offset and match it to the HEXES.

Updated July 30, 2022 by cybergeisha

[busmanl30 166 iPhone Xs Max 14.6]

On 10/31/2021 at 6:18 PM, cybergeisha said:

Thank so much for the replies! I actually figured out all of this like two hours after I submitted it and I didn't knew how to cancel! I didn't need to modify anything on IDA I just had to find the right offset and match it to the HEXES. 

The best why I’ve tried testing is literally RET each function and just see what happens or what  something unusual to happen, or breakpoint