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53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
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// winseh.cc
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// 12/13/2013 jichi
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#include "winseh/winseh.h"
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#include "ntdll/ntdll.h"
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//#include <cstdio>
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// - Global variables -
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seh_dword_t seh_esp[seh_capacity],
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seh_eip[seh_capacity],
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seh_eh[seh_capacity];
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seh_dword_t seh_count;
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// - Exception handlers -
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// VC 2013: http://msdn.microsoft.com/en-us/library/b6sf5kbd.aspx
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// typedef EXCEPTION_DISPOSITION (*PEXCEPTION_ROUTINE) (
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// _In_ PEXCEPTION_RECORD ExceptionRecord,
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// _In_ ULONG64 EstablisherFrame,
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// _Inout_ PCONTEXT ContextRecord,
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// _Inout_ PDISPATCHER_CONTEXT DispatcherContext
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// );
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//
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// winnt.h: http://www.codemachine.com/downloads/win81/ntdef.h
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// typedef
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// __drv_sameIRQL
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// __drv_functionClass(EXCEPTION_ROUTINE)
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// EXCEPTION_DISPOSITION
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// NTAPI
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// EXCEPTION_ROUTINE (
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// _Inout_ struct _EXCEPTION_RECORD *ExceptionRecord,
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// _In_ PVOID EstablisherFrame,
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// _In_ struct _CONTEXT *ContextRecord,
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// _In_ PVOID DispatcherContext
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// );
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extern "C" EXCEPTION_DISPOSITION _seh_handler( // extern C is needed to avoid name hashing in C++
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_In_ PEXCEPTION_RECORD ExceptionRecord,
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_In_ PVOID EstablisherFrame, // does not work if I use ULONG64
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_Inout_ PCONTEXT ContextRecord,
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_In_ PVOID DispatcherContext) // PDISPATCHER_CONTEXT is not declared in windows.h
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{
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//assert(::seh_count > 0);
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ContextRecord->Esp = ::seh_esp[::seh_count - 1];
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ContextRecord->Eip = ::seh_eip[::seh_count - 1];
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//printf("seh_handler:%i,%x,%x\n", ::seh_count, ContextRecord->Esp, ContextRecord->Eip);
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return ::seh_eh[::seh_count - 1] ?
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reinterpret_cast<PEXCEPTION_ROUTINE>(::seh_eh[::seh_count - 1])(ExceptionRecord, EstablisherFrame, ContextRecord, DispatcherContext) :
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ExceptionContinueExecution;
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}
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// EOF
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