6.5. WINDOWS NT
*ExceptionCode = ExceptionPointer->ExceptionRecord->ExceptionCode;if ( (*ExceptionCode == STATUS_IN_PAGE_ERROR) &&
(ExceptionPointer->ExceptionRecord->NumberParameters >= 3) ) {*ExceptionCode = (NTSTATUS) ExceptionPointer->ExceptionRecord->ExceptionInformation[2];
}ASSERT( !NT_SUCCESS(*ExceptionCode) );return EXCEPTION_EXECUTE_HANDLER;
}
Internally,SEHisanextensionoftheOS-supportedexceptions. Butthehandlerfunctionis_except_handler3
(for SEH3) or_except_handler4(for SEH4).
The code of this handler is MSVC-related, it is located in its libraries, or in msvcr*.dll. It is very important
to know that SEH is a MSVC thing.
Other win32-compilers may offer something completely different.
SEH3
SEH3 has_except_handler3as a handler function, and extends the_EXCEPTION_REGISTRATIONtable,
adding a pointer to thescope tableandprevious try levelvariable. SEH4 extends thescope tableby 4
values for buffer overflow protection.
Thescope tableis a table that consists of pointers to the filter and handler code blocks, for each nested
level oftry/except.