61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
/*
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* sehfix.c
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*
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* A test program involving an exception handler that fixes the exception
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* causing condition.
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*
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* In this code we install an exception handler my_handler and then a piece
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* of inline assembly attempts to write at the address marked in eax, after
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* setting eax to 10. This should produce an exception. The handler then
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* changes the eax register of the exception context to be the address of
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* a static variable and restarts the code. This should allow everything
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* to continue.
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*/
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#include <windows.h>
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#include <excpt.h>
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#include "exutil.h"
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int x;
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EXCEPTION_DISPOSITION
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my_handler (
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struct _EXCEPTION_RECORD* pExceptionRec,
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void* pEstablisherFrame,
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struct _CONTEXT* pContextRecord,
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void* pDispatcherContext
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)
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{
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printf ("In my exception handler!\n");
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DumpExceptionRecord (pExceptionRec);
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pContextRecord->Eax = (DWORD) &x;
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return ExceptionContinueExecution;
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}
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main ()
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{
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x = 2;
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printf ("x = %d\n", x);
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WalkExceptionHandlers();
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__try1(my_handler)
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WalkExceptionHandlers();
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/* This assembly code should produce an exception. */
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__asm__("movl $10,%%eax;movl $1,(%%eax);" : : : "%eax");
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__except1
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WalkExceptionHandlers();
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printf ("x = %d\n", x);
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printf ("Finished!\n");
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}
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