diff options
Diffstat (limited to 'winsup/mingw/samples/seh/eh3.c')
| -rw-r--r-- | winsup/mingw/samples/seh/eh3.c | 224 |
1 files changed, 112 insertions, 112 deletions
diff --git a/winsup/mingw/samples/seh/eh3.c b/winsup/mingw/samples/seh/eh3.c index e00201904..49a06ceab 100644 --- a/winsup/mingw/samples/seh/eh3.c +++ b/winsup/mingw/samples/seh/eh3.c @@ -1,112 +1,112 @@ -int
-__except_handler3(
- struct _EXCEPTION_RECORD* pExceptionRecord,
- struct EXCEPTION_REGISTRATION* pRegistrationFrame,
- struct _CONTEXT* pContextRecord,
- void* pDispatcherContext
- )
-{
- LONG filterFuncRet;
- LONG trylevel;
- EXCEPTION_POINTERS exceptPtrs;
- PSCOPETABLE pScopeTable;
-
-
- CLD // Clear the direction flag (make no assumptions!)
-
- // if neither the EXCEPTION_UNWINDING nor EXCEPTION_EXIT_UNWIND bit
- // is set... This is true the first time through the handler (the
- // non-unwinding case)
-
- if ( ! (pExceptionRecord->ExceptionFlags
- & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND)
- ) )
- {
- // Build the EXCEPTION_POINTERS structure on the stack
- exceptPtrs.ExceptionRecord = pExceptionRecord;
- exceptPtrs.ContextRecord = pContextRecord;
-
- // Put the pointer to the EXCEPTION_POINTERS 4 bytes below the
- // establisher frame. See ASM code for GetExceptionInformation
- *(PDWORD)((PBYTE)pRegistrationFrame - 4) = &exceptPtrs;
-
- // Get initial "trylevel" value
- trylevel = pRegistrationFrame->trylevel
-
- // Get a pointer to the scopetable array
- scopeTable = pRegistrationFrame->scopetable;
-
-search_for_handler:
- if ( pRegistrationFrame->trylevel != TRYLEVEL_NONE )
- {
- if ( pRegistrationFrame->scopetable[trylevel].lpfnFilter )
- {
-
- PUSH EBP // Save this frame EBP
-
- // !!!Very Important!!! Switch to original EBP. This is
- // what allows all locals in the frame to have the same
- // value as before the exception occurred.
-
- EBP = &pRegistrationFrame->_ebp
-
- // Call the filter function
- filterFuncRet = scopetable[trylevel].lpfnFilter();
-
- POP EBP // Restore handler frame EBP
-
- if ( filterFuncRet != EXCEPTION_CONTINUE_SEARCH )
- {
- if ( filterFuncRet < 0 ) // EXCEPTION_CONTINUE_EXECUTION
- return ExceptionContinueExecution;
-
- // If we get here, EXCEPTION_EXECUTE_HANDLER was specified
- scopetable == pRegistrationFrame->scopetable
-
- // Does the actual OS cleanup of registration frames
- // Causes this function to recurse
- __global_unwind2( pRegistrationFrame );
-
-
- // Once we get here, everything is all cleaned up, except
- // for the last frame, where we'll continue execution
- EBP = &pRegistrationFrame->_ebp
-
- __local_unwind2( pRegistrationFrame, trylevel );
-
- // NLG == "non-local-goto" (setjmp/longjmp stuff)
- __NLG_Notify( 1 ); // EAX == scopetable->lpfnHandler
-
- // Set the current trylevel to whatever SCOPETABLE entry
- // was being used when a handler was found
- pRegistrationFrame->trylevel = scopetable->previousTryLevel;
-
- // Call the _except {} block. Never returns.
- pRegistrationFrame->scopetable[trylevel].lpfnHandler();
- }
- }
-
- scopeTable = pRegistrationFrame->scopetable;
- trylevel = scopeTable->previousTryLevel
-
- goto search_for_handler;
- }
- else // trylevel == TRYLEVEL_NONE
- {
- retvalue == DISPOSITION_CONTINUE_SEARCH;
- }
- }
- else // EXCEPTION_UNWINDING or EXCEPTION_EXIT_UNWIND flags are set
- {
- PUSH EBP // Save EBP
-
- EBP = pRegistrationFrame->_ebp // Set EBP for __local_unwind2
-
- __local_unwind2( pRegistrationFrame, TRYLEVEL_NONE )
-
- POP EBP // Restore EBP
-
- retvalue == DISPOSITION_CONTINUE_SEARCH;
- }
-}
-
+int +__except_handler3( + struct _EXCEPTION_RECORD* pExceptionRecord, + struct EXCEPTION_REGISTRATION* pRegistrationFrame, + struct _CONTEXT* pContextRecord, + void* pDispatcherContext + ) +{ + LONG filterFuncRet; + LONG trylevel; + EXCEPTION_POINTERS exceptPtrs; + PSCOPETABLE pScopeTable; + + + CLD // Clear the direction flag (make no assumptions!) + + // if neither the EXCEPTION_UNWINDING nor EXCEPTION_EXIT_UNWIND bit + // is set... This is true the first time through the handler (the + // non-unwinding case) + + if ( ! (pExceptionRecord->ExceptionFlags + & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND) + ) ) + { + // Build the EXCEPTION_POINTERS structure on the stack + exceptPtrs.ExceptionRecord = pExceptionRecord; + exceptPtrs.ContextRecord = pContextRecord; + + // Put the pointer to the EXCEPTION_POINTERS 4 bytes below the + // establisher frame. See ASM code for GetExceptionInformation + *(PDWORD)((PBYTE)pRegistrationFrame - 4) = &exceptPtrs; + + // Get initial "trylevel" value + trylevel = pRegistrationFrame->trylevel + + // Get a pointer to the scopetable array + scopeTable = pRegistrationFrame->scopetable; + +search_for_handler: + if ( pRegistrationFrame->trylevel != TRYLEVEL_NONE ) + { + if ( pRegistrationFrame->scopetable[trylevel].lpfnFilter ) + { + + PUSH EBP // Save this frame EBP + + // !!!Very Important!!! Switch to original EBP. This is + // what allows all locals in the frame to have the same + // value as before the exception occurred. + + EBP = &pRegistrationFrame->_ebp + + // Call the filter function + filterFuncRet = scopetable[trylevel].lpfnFilter(); + + POP EBP // Restore handler frame EBP + + if ( filterFuncRet != EXCEPTION_CONTINUE_SEARCH ) + { + if ( filterFuncRet < 0 ) // EXCEPTION_CONTINUE_EXECUTION + return ExceptionContinueExecution; + + // If we get here, EXCEPTION_EXECUTE_HANDLER was specified + scopetable == pRegistrationFrame->scopetable + + // Does the actual OS cleanup of registration frames + // Causes this function to recurse + __global_unwind2( pRegistrationFrame ); + + + // Once we get here, everything is all cleaned up, except + // for the last frame, where we'll continue execution + EBP = &pRegistrationFrame->_ebp + + __local_unwind2( pRegistrationFrame, trylevel ); + + // NLG == "non-local-goto" (setjmp/longjmp stuff) + __NLG_Notify( 1 ); // EAX == scopetable->lpfnHandler + + // Set the current trylevel to whatever SCOPETABLE entry + // was being used when a handler was found + pRegistrationFrame->trylevel = scopetable->previousTryLevel; + + // Call the _except {} block. Never returns. + pRegistrationFrame->scopetable[trylevel].lpfnHandler(); + } + } + + scopeTable = pRegistrationFrame->scopetable; + trylevel = scopeTable->previousTryLevel + + goto search_for_handler; + } + else // trylevel == TRYLEVEL_NONE + { + retvalue == DISPOSITION_CONTINUE_SEARCH; + } + } + else // EXCEPTION_UNWINDING or EXCEPTION_EXIT_UNWIND flags are set + { + PUSH EBP // Save EBP + + EBP = pRegistrationFrame->_ebp // Set EBP for __local_unwind2 + + __local_unwind2( pRegistrationFrame, TRYLEVEL_NONE ) + + POP EBP // Restore EBP + + retvalue == DISPOSITION_CONTINUE_SEARCH; + } +} + |