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59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include <stdio.h>
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#include "Fundamentals.h"
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#include <windows.h>
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unsigned char old_instruction;
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extern "C" int
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SetBreakPoint(void *pc)
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{
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old_instruction = (*((unsigned char *) pc));
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*((unsigned char *) pc) = 0xcc; /* break point opcode */
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fprintf(stderr, "breakpoint at: %x\n", pc);
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fprintf(stderr, "value: %x\n", &old_instruction);
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/* Need to flush icache here */
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return 0;
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}
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__declspec(dllexport) EXCEPTION_DISPOSITION __cdecl
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_arun_handler(struct _EXCEPTION_RECORD
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*ExceptionRecord,
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void * EstablisherFrame,
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struct _CONTEXT *ContextRecord,
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void * DispatcherContext )
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{
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// Indicate that we made it to our exception handler
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fprintf(stderr, "Faulted with: 0x%x\n",ExceptionRecord->ExceptionCode);
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// Change EIP in the context record so that it points to someplace
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// where we can successfully continue
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switch (ExceptionRecord->ExceptionCode) {
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case STATUS_BREAKPOINT:
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fprintf(stderr, "Restoring the instruction at %x\n",
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ContextRecord->Eip);
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(*(unsigned char *) (ContextRecord->Eip)) = old_instruction;
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fprintf(stderr, "Restored: %x\n", old_instruction);
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// Reexecute the same instruction
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return ExceptionContinueExecution;
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default:
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return ExceptionContinueSearch;
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}
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}
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