Help/Support Testing offsets within gdb

[Juku 5k iPhone SE 11.3.1]

Hello, so recently I have been using gdb to hack things and its been working wonderfully, only problem is, when it comes to testing, I have to do it the long way which is editing binary in HxD and then resigning blah blah and retransfering it over to my device.

 

1) I know there is a quicker and much more efficient way in gdb by doing: set *0xOffset=0xHexCode

But I'm so confused. Which code is it talking about? arm hex, thumb hex, arm gdb/lldb, which one is it talking about? Am I doing something wrong. Because I edited the code the binary way and it worked fine. But it does nothing when I do the set command.

 

2) Sometimes I get this weird error in gdb saying: Cannot access memory address

Updated February 5, 2017 by Gaius

[Rook 548.3k iPad Pro (2nd gen) 17.4 Donor]

http://armconverter.com/

 

It's 90% of the time Thumb GDB/LLDB

 

I don't see many ARM binaries floating around now.

 

Basically, gdb/lldb hex is simply reversed.

[Juku 5k iPhone SE 11.3.1]

http://armconverter.com/

 

It's 90% of the time Thumb GDB/LLDB

 

I don't see many ARM binaries floating around now.

 

Basically, gdb/lldb hex is simply reversed.

oh lmao so you type it in backwards?