mirror of
https://github.com/hakril/PythonForWindows
synced 2026-06-08 14:31:45 +00:00
Clement Rouault
44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
import sys
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import os.path
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import pprint
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sys.path.append(os.path.abspath(__file__ + "\..\.."))
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import windows
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from windows.generated_def.winstructs import *
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import windows.native_exec.simple_x86 as x86
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class SingleSteppingDebugger(windows.debug.LocalDebugger):
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SINGLE_STEP_COUNT = 4
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def on_exception(self, exc):
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code = self.get_exception_code()
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context = self.get_exception_context()
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print("EXCEPTION !!!! Got a {0} at 0x{1:x}".format(code, context.pc))
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self.SINGLE_STEP_COUNT -= 1
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if self.SINGLE_STEP_COUNT:
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return self.single_step()
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return EXCEPTION_CONTINUE_EXECUTION
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class RewriteBreakpoint(windows.debug.HXBreakpoint):
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def trigger(self, dbg, exc):
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context = dbg.get_exception_context()
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print("GOT AN HXBP at 0x{0:x}".format(context.pc))
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# Rewrite the infinite loop with 2 nop
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windows.current_process.write_memory(self.addr, "\x90\x90")
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# Ask for a single stepping
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return dbg.single_step()
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d = SingleSteppingDebugger()
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# Infinite loop + nop + ret
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code = x86.assemble("label :begin; jmp :begin; nop; ret")
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func = windows.native_exec.create_function(code, [PVOID])
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print("Code addr = 0x{0:x}".format(func.code_addr))
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# Create a thread that will infinite loop
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t = windows.current_process.create_thread(func.code_addr, 0)
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# Add a breakpoint on the infitine loop
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d.add_bp(RewriteBreakpoint(func.code_addr))
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t.wait()
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print("Done!")
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