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SEH简单笔记
2011-12-21 17:09 5444

SEH简单笔记

2011-12-21 17:09
5444
回头看了下,大致做了下笔记,正好出了一个新手版块,就发这里了,看的时候尚需抱怀疑态度

■结构化异常处理SEH

        TIB线程信息块                         TEB线程环境块               ╭─-→      PEB进程环境块
+00h[   ExceptionList    ]←╮      +00h[         NtTib          ]{TIB}   │ +00h[ InheritedAddressSpace ]
+04h[     StackBase      ]  │      +1Ch[   EnvironmentPointer   ]        │ +01h[ReadImageFileExecOpions]
+08h[     StackLimit     ]  │      +20h[        ClienId         ]        │ +02h[     BeingDebugged     ]
+0ch[    SubSystemTib    ]  │          [          ...           ]        │     [          ...          ]
+10h[    u.FiberData     ]  │          [          ...           ]        │     [          ...          ]
    [    u.Version       ]  │      +30h[ProcessEnvironmentBlock*]────╯ +68h[     NtGlobalFlag      ]
+14h[ArbitraryUserPointer]  │          [          ...           ]           +70h[CriticalSectionTimeOut ]
+18h[        Self        ]─╯     +fb5h[      BooleanSpare      ]           +78h[  HeapSegmentReserve   ]

   EXCEPTION_REGISTRATION ╭→EXCEPTION_REGISTRATION ╭→...        ╭→EXCEPTION_REGISTRATION
FS:[0]→[  prev  ]────╯       [  prev  ]────╯     ────╯       [FFFFFFFh]
        [handler1]                 [handler2]                                [handler3]

                        ╭─→   EXCEPTION_RECORD
                        │    [    ExceptionCode     ] //switch
                        │    [    ExceptionFlags    ]
                        │    [  EXCEPTION_RECORD*   ]
                        │    [   ExceptionAddress   ]
                        │    [   NumberParameters   ]
 EXCEPTION_POINTERS     │    [ExceptionInformation[]] //[0]为0则读,为1则写   [1]触发地址
 [pEXCEPTION_RECORD]──╯
 [    pCONTEXT     ]────→       CONTEXT
                          +00h[   ContextFlags    ]══════╣CONTEXT_i386
                          +04h[       Dr0         ]①          ║CONTEXT_i486
                          +08h[       Dr1         ]│          ║CONTEXT_DEBUG_REGISTERS①
                          +0Ch[       Dr2         ]│          ║CONTEXT_FLOATING_POINT②
                          +10h[       Dr3         ]│          ║CONTEXT_SEGMENTS③
                          +14h[       Dr6         ]│          ║CONTEXT_INTEGER④
                          +18h[       Dr7         ]①          ║CONTEXT_CONTROL⑤
                      +1C~+88h[    FloatSave      ]②          ║CONTEXT_EXTENDED_REGISTERS⑥
                          +8Ch[      SegGs        ]③          ║CONTEXT_FULL③~⑤
                          +90h[      SegFs        ]│          ║CONTEXT_ALL①~⑥
                          +94h[      SegEs        ]│
                          +98h[      SegDs        ]③
                          +9Ch[       Edi         ]④
                          +A0h[       Esi         ]│
                          +A4h[       Ebx         ]│
                          +A8h[       Edx         ]│
                          +ACh[       Ecx         ]│
                          +B0h[       Eax         ]④
                          +B4h[       Ebp         ]⑤
                          +B8h[       Eip         ]│
                          +BCh[      SegCs        ]│
                          +C0h[      EFlags       ]│
                          +C4h[       Esp         ]│
                          +C8h[      SegSs        ]⑤
                          +CCh[ExtendedRegisters[]]⑥

  1个线程对应1个TEB结构;FS:[0]指向当前线程的TEB结构(即TIB.ExceptionList)
  程序构造ERR(常用原FS[0]的prev)并使FS:[0]指向;FS:[4]即handler(常异常前现于栈)尽早设断
  异常后步入系统(F7或Shift+F7),栈顶为EXCEPTION_POINTERS,故D [esp+4]+0b8为CONTEXT.Eip
㈠若被调试则系统填写EXCEPTION_DEBUG_INFO(其dwFirstChance=1)并通知调试器
㈡若未处理则经过线程ERR或ERR链;回调ERR.handler内常修改CONTEXT.Eip且清零CONTEXT.DrX;返回后将进系统再至新eip
㈢若被调试则系统填写EXCEPTION_DEBUG_INFO(其dwFirstChance=0)并通知调试器
㈣若未处理且程序SetUnhandledExceptionFilter且未被调试则转至进程filter
㈤若未处理则系统弹框让选直接终止或附加调试器
㈥直接终止或附加失败或未处理都将再过线程ERR链并终止

■调试器
                               DEBUG_EVENT
                          [ dwDebugEventCode  ]-╮
                          [    dwProcessId    ] ↓
                          [    dwThreadId     ]      
     EXCEPTION_DEBUG_INFO [u.Exception        ]//执行首指令前(EXCEPTION_DEBUG_EVENT): switch(.ExceptionRecord.ExceptionCode)
 CREATE_THREAD_DEBUG_INFO [u.CreateThread     ]//创建支线程或被捆绑(CREATE_THREAD_DEBUG_EVENT)时用此
CREATE_PROCESS_DEBUG_INFO [u.CreateProcessInfo]//进程刚被创建或捆绑(CREATE_PROCESS_DEBUG_EVENT)时用此
   EXIT_THREAD_DEBUG_INFO [u.ExitThread       ]//支线程退出(EXIT_THREAD_DEBUG_EVENT)时用此
  EXIT_PROCESS_DEBUG_INFO [u.ExitProcess      ]//进程退出(EXIT_PROCESS_DEBUG_EVENT)时用此
      LOAD_DLL_DEBUG_INFO [u.LoadDll          ]//加载动态链接库(LOAD_DLL_DEBUG_EVENT)时用此
    UNLOAD_DLL_DEBUG_INFO [u.UnloadDll        ]//卸载动态链接库(UNLOAD_DLL_DEBUG_EVENT)时用此
 OUTPUT_DEBUG_STRING_INFO [u.DebugString      ]//向调试器发消息字符串(OUTPUT_DEBUG_STRING_EVENT)时用此
                 RIP_INFO [u.RipInfo          ]//系统调试出错(RIP_EVENT)时用此

 EXCEPTION_DEBUG_INFO       CREATE_PROCESS_DEBUG_INFO          LOAD_DLL_DEBUG_INFO      UNLOAD_DLL_DEBUG_INFO
  [ExceptionRecord]          [        hFile        ]o        [        hFile        ]o      [lpBaseOfDll]
  [ dwFirstChance ]          [      hProcess       ]         [     lpBaseOfDll     ]
                             [       hThread       ]         [dwDebugInfoFileOffset]
                             [    lpBaseOfImage    ]         [   nDebugInfoSize    ]
                             [dwDebugInfoFileOffset]         [     lpImageName     ]x
                             [   nDebugInfoSize    ]         [      fUnicode       ]
                             [  lpThreadLocalBase  ]
                             [   lpStartAddress    ]
                             [     lpImageName     ]x
                             [      fUnicode       ]

 CREATE_THREAD_DEBUG_INFO      EXIT_THREAD_DEBUG_INFO     OUTPUT_DEBUG_STRING_INFO    EXIT_PROCESS_DEBUG_INFO
   [     hThread     ]              [dwExitCode]            [lpDebugStringData ]           [dwExitCode]
   [lpThreadLocalBase]                                      [     fUnicode     ]
   [ lpStartAddress  ]                                      [nDebugStringLength]

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最新回复 (3)
雪    币: 110
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牛皮哄哄 活跃值 2011-12-21 17:12
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补充一下,ERR就是EXCEPTION_REGISTRATION_RECORD,上面那个链的结点
还有就是调试器ExceptionRecord和系统压的那个结构里的可以不区分,因为寄存器硬件是同一套
既然是笔记,大可记事本伺候
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xiaocszn 活跃值 2012-2-11 18:47
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好东西啊!问下楼主,字符画是用什么工具编辑的呢?
雪    币: 110
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牛皮哄哄 活跃值 2012-2-21 20:49
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应该都是制表符 记事本里翻出来的
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