Help/Support Need advice IDA

[Ryan Z 169 iPhone Xs Max 12.0]

Could anybody tell me when to use for example ADD(s), SUB(s), MOV(s), STR, LDR. and what numbers on register read I should be linking to it?

[Guest]

Check the tutorials section, there are some topics explaining all of this.

[Ted2 39.1k iPhone 13 Pro 16.0 Donor]

You use them when the original value use them too.

 

for example if you got a function that's for rewards & you see a ADD/S in it. You know you have to change that.

 

If its a spend/consume/use function, you look for a SUB.

 

But most people just

MOV R0, R7

BX LR 

a function from the top. What this does is move the value of r7 into r0, skip rest of function.

 

But this may end up in visual sh!t sometimes.

 

I like doing things inside the function rather that mov r0, r7 it.

[Joka 3.3k iPhone X 12.4]

11 minutes ago, Ted2 said:

You use them when the original value use them too.

 

for example if you got a function that's for rewards & you see a ADD/S in it. You know you have to change that.

 

If its a spend/consume/use function, you look for a SUB.

 

But most people just

MOV R0, R7

BX LR 

a function from the top. What this does is move the value of r7 into r0, skip rest of function.

 

But this may end up in visual sh!t sometimes.

 

I like doing things inside the function rather that mov r0, r7 it.

Shut up

[Ryan Z 169 iPhone Xs Max 12.0]

so if the IDA offset takes you to for example a sub, you keep it as a sub but how do you know what r numbers to add to it

[Ted2 39.1k iPhone 13 Pro 16.0 Donor]

17 minutes ago, RyanZ said:

so if the IDA offset takes you to for example a sub, you keep it as a sub but how do you know what r numbers to add to it

No idk how to explain it lol