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Add code injection for far-away branching for arm64
This is implemented using "emulation" by using breakpoints so Bit Slicer can modify the program counter to jump to and back from the island that has the newly injected code. There is still quite a bit of polish/implementation work need to be done.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * Copyright (c) 2022 Mayur Pawashe | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions | ||
| * are met: | ||
| * | ||
| * Redistributions of source code must retain the above copyright notice, | ||
| * this list of conditions and the following disclaimer. | ||
| * | ||
| * Redistributions in binary form must reproduce the above copyright | ||
| * notice, this list of conditions and the following disclaimer in the | ||
| * documentation and/or other materials provided with the distribution. | ||
| * | ||
| * Neither the name of the project's author nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED | ||
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
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| #import <Foundation/Foundation.h> | ||
| #import "ZGProcessTypes.h" | ||
| #import "ZGBreakPointDelegate.h" | ||
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| @class ZGProcess; | ||
| @class ZGInstruction; | ||
| @class ZGBreakPointController; | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| @interface ZGCodeInjectionHandler : NSObject <ZGBreakPointDelegate> | ||
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| @property (nonatomic, readonly, nullable) ZGInstruction *toIslandInstruction; | ||
| @property (nonatomic, readonly, nullable) ZGInstruction *fromIslandInstruction; | ||
| @property (nonatomic, readonly) ZGMemoryAddress islandAddress; | ||
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| - (BOOL)addBreakPointWithToIslandInstruction:(ZGInstruction *)toIslandInstruction fromIslandInstruction:(ZGInstruction *)fromIslandInstruction islandAddress:(ZGMemoryAddress)islandAddress process:(ZGProcess *)process processType:(ZGProcessType)processType breakPointController:(ZGBreakPointController *)breakPointController; | ||
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| - (void)removeBreakPoints; | ||
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| @end | ||
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| NS_ASSUME_NONNULL_END |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,115 @@ | ||
| /* | ||
| * Copyright (c) 2022 Mayur Pawashe | ||
| * All rights reserved. | ||
| * | ||
| * Redistribution and use in source and binary forms, with or without | ||
| * modification, are permitted provided that the following conditions | ||
| * are met: | ||
| * | ||
| * Redistributions of source code must retain the above copyright notice, | ||
| * this list of conditions and the following disclaimer. | ||
| * | ||
| * Redistributions in binary form must reproduce the above copyright | ||
| * notice, this list of conditions and the following disclaimer in the | ||
| * documentation and/or other materials provided with the distribution. | ||
| * | ||
| * Neither the name of the project's author nor the names of its | ||
| * contributors may be used to endorse or promote products derived from | ||
| * this software without specific prior written permission. | ||
| * | ||
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED | ||
| * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
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| #import "ZGCodeInjectionHandler.h" | ||
| #import "ZGBreakPointController.h" | ||
| #import "ZGBreakPoint.h" | ||
| #import "ZGInstruction.h" | ||
| #import "ZGVariable.h" | ||
| #import "ZGDebugLogging.h" | ||
| #import "ZGRegistersState.h" | ||
| #import "ZGProcess.h" | ||
| #import "ZGVirtualMemory.h" | ||
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| @implementation ZGCodeInjectionHandler | ||
| { | ||
| ZGBreakPointController *_breakPointController; | ||
| ZGInstruction *_toIslandInstruction; | ||
| ZGInstruction *_fromIslandInstruction; | ||
| ZGMemoryAddress _islandAddress; | ||
| ZGProcessType _processType; | ||
| ZGProcess *_process; | ||
| } | ||
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| - (BOOL)addBreakPointWithToIslandInstruction:(ZGInstruction *)toIslandInstruction fromIslandInstruction:(ZGInstruction *)fromIslandInstruction islandAddress:(ZGMemoryAddress)islandAddress process:(ZGProcess *)process processType:(ZGProcessType)processType breakPointController:(ZGBreakPointController *)breakPointController | ||
| { | ||
| _breakPointController = breakPointController; | ||
| _toIslandInstruction = toIslandInstruction; | ||
| _fromIslandInstruction = fromIslandInstruction; | ||
| _islandAddress = islandAddress; | ||
| _processType = processType; | ||
| _process = process; | ||
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| if (![breakPointController addBreakPointOnInstruction:toIslandInstruction inProcess:process emulated:YES delegate:self]) | ||
| { | ||
| return NO; | ||
| } | ||
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| if (![breakPointController addBreakPointOnInstruction:fromIslandInstruction inProcess:process emulated:YES delegate:self]) | ||
| { | ||
| [breakPointController removeBreakPointOnInstruction:toIslandInstruction inProcess:process]; | ||
| return NO; | ||
| } | ||
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| return YES; | ||
| } | ||
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| - (void)removeBreakPoints | ||
| { | ||
| if (_fromIslandInstruction != nil) | ||
| { | ||
| [_breakPointController removeBreakPointOnInstruction:_fromIslandInstruction inProcess:_process]; | ||
| _fromIslandInstruction = nil; | ||
| } | ||
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| if (_toIslandInstruction != nil) | ||
| { | ||
| [_breakPointController removeBreakPointOnInstruction:_toIslandInstruction inProcess:_process]; | ||
| _toIslandInstruction = nil; | ||
| } | ||
| } | ||
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| - (void)breakPointDidHit:(ZGBreakPoint *)breakPoint | ||
| { | ||
| ZGMemoryAddress breakPointAddress = breakPoint.variable.address; | ||
| ZGMemoryMap processTask = _process.processTask; | ||
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| zg_thread_state_t threadState; | ||
| mach_msg_type_number_t threadStateCount; | ||
| thread_act_t thread = breakPoint.thread; | ||
| if (!ZGGetGeneralThreadState(&threadState, thread, &threadStateCount)) | ||
| { | ||
| ZG_LOG(@"Error: failed to retrieve general thread state set in code injection breakpoint handler"); | ||
| ZGResumeTask(processTask); | ||
| return; | ||
| } | ||
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| ZGMemoryAddress newInstructionAddress = (breakPointAddress == _toIslandInstruction.variable.address) ? _islandAddress : (_toIslandInstruction.variable.address + _toIslandInstruction.variable.size); | ||
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| ZGSetInstructionPointerFromGeneralThreadState(&threadState, newInstructionAddress, _processType); | ||
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| ZGSetGeneralThreadState(&threadState, thread, threadStateCount); | ||
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| ZGResumeTask(processTask); | ||
| } | ||
|
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| @end |
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