[TUTORIAL] How To Hack Using IDA

[latestz 55]

Anyone can help me with this?

I decompiled a .dylid into this:

var_8= -8
var_4= -4

SUB             SP, SP, #8
MOVS            R2, #1
STR             R0, [SP,#8+var_4]
STR             R1, [SP,#8+var_8]
MOV             R0, R2
ADD             SP, SP, #8
BX              LR

And the actual code is:

%hook SomeClass
- (int)somemethod {
return 1;
}
%end

I try to make it to return 0 (false). I did by changing MOVS R2, #1 to MOVS R2, #0 but it still returning 1. Any ideas?

[kebrumotis 3 iPhone 5s 11]

I feel like making you my teacher for ARM. I wish you could help me on some games

[kebrumotis 3 iPhone 5s 11]

"MOV R0,#0 is a very common way of writing false".....only R0 is used for true/false or it can be any register to say true as long as the operand is #0/#1.????

[_Seb1 368 iPad Air 2 11.3.1]

why do you have that less likes when you wrote this pretty damn helpful tutorial? Man wish u the best.

[x30 1]

Quite informative  thanks for putting this together  great job

I personally find that using the hexreys decompiler for arm helps figure out what a subroutine does much faster than just reading the raw arm 

Updated January 5, 2019 by x30
typo ;)

[Piro 2 iPhone 7 12]

I read it once and i don't underdanted so much, now i see all again and everything is fine and awesome, now i can undestand every word in this tutorial, it's all very clear *-*. Thank you for this amazin, complete and clear tutorial \o/

[z2x22 2.6k iPhone X 12.1.1]

Thanks to hard work my bro

[Demmal12 0 iPhone 7 Plus 12.1.2]

ggggggg

[211ethan211 0 iPhone 7 Plus 12.1.1]

Gg

[Raxy 1]

Can this be applicable to online server sided games