Help/Support IDA & GDB Help Needed

[beantownfan73 6 26 9.0.2]

Just a few questions as I am a little confused about some stuff

 

1 - In one of the tuts, it says in IDA go to the very beginning of the file and the first listed is the ASLR. It says to use this offset and subtract it (or add, can't remember at the moment) from the address given in GDB (using info address_mh_execute_header command) and then that address is the ASLR bias. Now, in IDA, the first listed for my binary is HEADER:00004000. The offset, located at the bottom left, is listed as 00000000. Does this sound correct? Am I looking in the right spot in IDA?

 

2 - Even with Google I am having a hard time finding a good tut on setting watchpoints in GDB, anyone know of any?

 

Thank you for your time!

 

NOTE - When I att the game to GDB and run the command info address _mh_execute_header, the game freezes up and I am unable to do anything with it

Updated February 1, 2016 by beantownfan73

[beantownfan73 6 26 9.0.2]

Below is what is listed after attaching game to GDB

 

 

 

***WARNING***: Possible number of sections anti-debug trick detected at segment __DATA_DIRTY !

Number of sections reported from the header is 2, the real number should be 2

Reading symbols for shared libraries + done

0x391e9130 in mach_msg_trap ()

(gdb) info address _mh_execute_header

Symbol "_mh_execute_header" is at 0x10000 in a file compiled without debugging.

[beantownfan73 6 26 9.0.2]

UPDATE - I was an idiot and read the tutorial wrong, I was able to get the game attached and run the commands. The problem was with another area of GDB.