Help/Support MOV R1, R7 changes value to 0 :/

Ted2 · March 31, 2017

Heyy,

This was the code I tried hacking:

MOV             R1, #(_OBJC_IVAR_$_State.coins - 0x3B080) ; Coins *coins;
ADD             R1, PC  ; Coins *coins;
LDR             R1, [R1] ; Coins *coins;  -----
LDR             R0, [R0,R1]
BX              LR

TO:

MOV             R1, #(_OBJC_IVAR_$_State.coins - 0x3B080) ; Coins *coins;
ADD             R1, PC  ; Coins *coins;
MOV             R1, R7  -----
LDR             R0, [R0,R1]
BX              LR

But the coins went from 200 to 0

Did I hack the wrong thing?

Updated March 31, 2017 by Ted2

0xSUBZ3R0 · March 31, 2017

1 minute ago, Ted2 said:

Heyy,

This was the code I tried hacking:


MOV             R1, #(_OBJC_IVAR_$_State.coins - 0x3B080) ; Coins *coins;
ADD             R1, PC  ; Coins *coins;
LDR             R1, [R1] ; Coins *coins;  -----
LDR             R0, [R0,R1]
BX              LR

TO:

MOV             R1, #(_OBJC_IVAR_$_State.coins - 0x3B080) ; Coins *coins;
ADD             R1, PC  ; Coins *coins;
MOV             R1, R7  -----
LDR             R0, [R0,R1]
BX              LR

mov r0,r7

But the coins went from 200 to 0

Did I hack the wrong function?

MOV R0,R7 coins is stored in r0

Updated March 31, 2017 by MRS14T3R

Archangel04 · March 31, 2017

probably is the "use x coins" with a "minimum 0"

try this 'mov r1, #1'

Ted2 · March 31, 2017

5 minutes ago, Archangel04 said:

probably is the "use x coins" with a "minimum 0"

try this 'mov r1, #1'

You mean at the LDR function?

If yes, it crashes now.

6 minutes ago, MRS14T3R said:

MOV R0,R7 coins is stored in r0

Oh, so I did it wrong?

Mayaxaya · March 31, 2017

4 hours ago, Ted2 said:

You mean at the LDR function?

If yes, it crashes now.

Oh, so I did it wrong?

R7 is a register that holds a giant value iin 99% of the cases. But not for all games. Can be zero too. Try to go for @MRS14T3R 's advice and try r0, r7.

Ted2 · March 31, 2017

1 hour ago, Mayaxaya said:

R7 is a register that holds a giant value iin 99% of the cases. But not for all games. Can be zero too. Try to go for @MRS14T3R 's advice and try r0, r7.

But the normal LDR Function started with R1.. But lemme try #I'mnoob

edit:

Crash

Updated March 31, 2017 by Ted2