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Difference between revisions of "PE i can has debugger Patch"
(from Stefan Esser's presentation - starting category Patches) |
(No difference)
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Revision as of 20:54, 25 September 2011
- AMFI will allow non signed binaries
- disables various checks
- used inside the kernel debugger
- in older jailbreaks replaced by RETURN(1)
__text:801DD218 __text:801DD218 EXPORT _PE_i_can_has_debugger __text:801DD218 _PE_i_can_has_debugger ; CODE XREF: sub_801DD23C+8↓p __text:801DD218 ; sub_802D8A94+E↓p ... __text:801DD218 CBZ R0, loc_801DD22E __text:801DD21A LDR R2, =dword_80284A00 <== variable patched to 1 __text:801DD21C LDR R3, [R2] __text:801DD21E CBNZ R3, loc_801DD226 __text:801DD220 STR R3, [R0] __text:801DD222 __text:801DD222 loc_801DD222 ; CODE XREF: _PE_i_can_has_debugger+14 __text:801DD222 ; _PE_i_can_has_debugger+18↓j __text:801DD222 LDR R0, [R2] __text:801DD224 BX LR __text:801DD226 ; --------------------------------------------------------------------------- __text:801DD226 __text:801DD226 loc_801DD226 ; CODE XREF: _PE_i_can_has_debugger+6↑ __text:801DD226 LDR R3, =dword_802731A0 __text:801DD228 LDR R3, [R3] __text:801DD22A STR R3, [R0] __text:801DD22C B loc_801DD2.. __text:801DD22E ; --------------------------------------------------------------------------- __text:801DD22E __text:801DD22E loc_801DD22E ; ... __text:801DD22E LDR R2, =dword_... __text:801DD230 B loc_801DD2.. __text:801DD230 ; End of function _PE_i_can_has_debugger __text:801DD230 __text:801DD230 ; ---------------------------------------------------------------------------
