Help/Support [Question] Help needed with IDA

[Archangel04 33.2k iPhone 7 14.3]

Hi guys,

 

While working on IDA Pro, in the game Star Wars Commander (v4.0.0), I found a function with 

 

making this zero can also work

 

 _BuildingTypeVO_get_Time_m11804         ; CODE XREF: _ContractUtils_GetBuildingContractTotalTime_m15483+13Cp

__text:000DA834                                         ; _GameUtils_CrystalCostToInstantUpgrade_m15608+5Ep ...

__text:000DA834                 LDR             R0, [R0,#0x74]

__text:000DA836                 BX              LR

__text:000DA836 ; End of function _BuildingTypeVO_get_Time_m11804

__text:000DA836

__text:000DA838

__text:000DA838 ; =============== S U B R O U T I N E =======================================

__text:000DA838

__text:000DA838

__text:000DA838 _BuildingTypeVO_set_Time_m11805

__text:000DA838                 STR             R1, [R0,#0x74]

__text:000DA83A                 BX              LR

__text:000DA83A ; End of function _BuildingTypeVO_set_Time_m11805

__text:000DA83A

__text:000DA83C

 

i can patch the binary at a point where it says LDR R0 [R0,#0x74]. (in BOLD)

it is in Thumb Hex form, and if i change hex to 00 68 it will become LDR R0 [R0].

Is this binary okay?

Similarly, i can make the STR one R1, [R0]

Updated May 27, 2016 by Sk04

[Archangel04 33.2k iPhone 7 14.3]

on recommendation of EndouMa, i changed the LDR line to 0020 in hex (the mov r0 one)

Updated May 27, 2016 by Sk04

[sn0wqt 42.7k iPhone X 13.3]

on recommendation of EndouMou, i changed the LDR line to 0020 in hex (the mov r0 one)

and what happened?

[Archangel04 33.2k iPhone 7 14.3]

app is crashing whenever i open it with 777 permissions (jailbroken, ios 9.0.2, ipad air)

[Archangel04 33.2k iPhone 7 14.3]

on setting str to 0020, it worked. but it was a visual. topic closed