TEB PEB

PEB

typedef struct _PEB
{
    UCHAR InheritedAddressSpace; // 00h
    UCHAR ReadImageFileExecOptions; // 01h
    UCHAR BeingDebugged; // 02h
    UCHAR Spare; // 03h
    PVOID Mutant; // 04h
    PVOID ImageBaseAddress; // 08h
    PPEB_LDR_DATA Ldr; // 0Ch
    PRTL_USER_PROCESS_PARAMETERS ProcessParameters; // 10h
    PVOID SubSystemData; // 14h
    PVOID ProcessHeap; // 18h
    PVOID FastPebLock; // 1Ch
    PPEBLOCKROUTINE FastPebLockRoutine; // 20h
    PPEBLOCKROUTINE FastPebUnlockRoutine; // 24h
    ULONG EnvironmentUpdateCount; // 28h
    PVOID* KernelCallbackTable; // 2Ch
    PVOID EventLogSection; // 30h
    PVOID EventLog; // 34h
    PPEB_FREE_BLOCK FreeList; // 38h
    ULONG TlsExpansionCounter; // 3Ch
    PVOID TlsBitmap; // 40h
    ULONG TlsBitmapBits[0x2]; // 44h
    PVOID ReadOnlySharedMemoryBase; // 4Ch
    PVOID ReadOnlySharedMemoryHeap; // 50h
    PVOID* ReadOnlyStaticServerData; // 54h
    PVOID AnsiCodePageData; // 58h
    PVOID OemCodePageData; // 5Ch
    PVOID UnicodeCaseTableData; // 60h
    ULONG NumberOfProcessors; // 64h
    ULONG NtGlobalFlag; // 68h
    UCHAR Spare2[0x4]; // 6Ch
    LARGE_INTEGER CriticalSectionTimeout; // 70h
    ULONG HeapSegmentReserve; // 78h
    ULONG HeapSegmentCommit; // 7Ch
    ULONG HeapDeCommitTotalFreeThreshold; // 80h
    ULONG HeapDeCommitFreeBlockThreshold; // 84h
    ULONG NumberOfHeaps; // 88h
    ULONG MaximumNumberOfHeaps; // 8Ch
    PVOID** ProcessHeaps; // 90h
    PVOID GdiSharedHandleTable; // 94h
    PVOID ProcessStarterHelper; // 98h
    PVOID GdiDCAttributeList; // 9Ch
    PVOID LoaderLock; // A0h
    ULONG OSMajorVersion; // A4h
    ULONG OSMinorVersion; // A8h
    ULONG OSBuildNumber; // ACh
    ULONG OSPlatformId; // B0h
    ULONG ImageSubSystem; // B4h
    ULONG ImageSubSystemMajorVersion; // B8h
    ULONG ImageSubSystemMinorVersion; // C0h
    ULONG GdiHandleBuffer[0x22]; // C4h
    PVOID ProcessWindowStation; // ???
} PEB, *PPEB;

TEB

//
// Thread Environment Block (TEB)
//
typedef struct _TEB
{
    NT_TIB Tib;                             /* 00h */
    PVOID EnvironmentPointer;               /* 1Ch */
    CLIENT_ID Cid;                          /* 20h */
    PVOID ActiveRpcHandle;                  /* 28h */
    PVOID ThreadLocalStoragePointer;        /* 2Ch */
    struct _PEB *ProcessEnvironmentBlock;   /* 30h */
    ULONG LastErrorValue;                   /* 34h */
    ULONG CountOfOwnedCriticalSections;     /* 38h */
    PVOID CsrClientThread;                  /* 3Ch */
    struct _W32THREAD* Win32ThreadInfo;     /* 40h */
    ULONG User32Reserved[0x1A];             /* 44h */
    ULONG UserReserved[5];                  /* ACh */
    PVOID WOW32Reserved;                    /* C0h */
    LCID CurrentLocale;                     /* C4h */
    ULONG FpSoftwareStatusRegister;         /* C8h */
    PVOID SystemReserved1[0x36];            /* CCh */
    LONG ExceptionCode;                     /* 1A4h */
    struct _ACTIVATION_CONTEXT_STACK *ActivationContextStackPointer; /* 1A8h */
    UCHAR SpareBytes1[0x28];                /* 1ACh */
    GDI_TEB_BATCH GdiTebBatch;              /* 1D4h */
    CLIENT_ID RealClientId;                 /* 6B4h */
    PVOID GdiCachedProcessHandle;           /* 6BCh */
    ULONG GdiClientPID;                     /* 6C0h */
    ULONG GdiClientTID;                     /* 6C4h */
    PVOID GdiThreadLocalInfo;               /* 6C8h */
    ULONG Win32ClientInfo[62];              /* 6CCh */
    PVOID glDispatchTable[0xE9];            /* 7C4h */
    ULONG glReserved1[0x1D];                /* B68h */
    PVOID glReserved2;                      /* BDCh */
    PVOID glSectionInfo;                    /* BE0h */
    PVOID glSection;                        /* BE4h */
    PVOID glTable;                          /* BE8h */
    PVOID glCurrentRC;                      /* BECh */
    PVOID glContext;                        /* BF0h */
    NTSTATUS LastStatusValue;               /* BF4h */
    UNICODE_STRING StaticUnicodeString;     /* BF8h */
    WCHAR StaticUnicodeBuffer[0x105];       /* C00h */
    PVOID DeallocationStack;                /* E0Ch */
    PVOID TlsSlots[0x40];                   /* E10h */
    LIST_ENTRY TlsLinks;                    /* F10h */
    PVOID Vdm;                              /* F18h */
    PVOID ReservedForNtRpc;                 /* F1Ch */
    PVOID DbgSsReserved[0x2];               /* F20h */
    ULONG HardErrorDisabled;                /* F28h */
    PVOID Instrumentation[14];              /* F2Ch */
    PVOID SubProcessTag;                    /* F64h */
    PVOID EtwTraceData;                     /* F68h */
    PVOID WinSockData;                      /* F6Ch */
    ULONG GdiBatchCount;                    /* F70h */
    BOOLEAN InDbgPrint;                     /* F74h */
    BOOLEAN FreeStackOnTermination;         /* F75h */
    BOOLEAN HasFiberData;                   /* F76h */
    UCHAR IdealProcessor;                   /* F77h */
    ULONG GuaranteedStackBytes;             /* F78h */
    PVOID ReservedForPerf;                  /* F7Ch */
    PVOID ReservedForOle;                   /* F80h */
    ULONG WaitingOnLoaderLock;              /* F84h */
    ULONG SparePointer1;                    /* F88h */
    ULONG SoftPatchPtr1;                    /* F8Ch */
    ULONG SoftPatchPtr2;                    /* F90h */
    PVOID *TlsExpansionSlots;               /* F94h */
    ULONG ImpersionationLocale;             /* F98h */
    ULONG IsImpersonating;                  /* F9Ch */
    PVOID NlsCache;                         /* FA0h */
    PVOID pShimData;                        /* FA4h */
    ULONG HeapVirualAffinity;               /* FA8h */
    PVOID CurrentTransactionHandle;         /* FACh */
    PTEB_ACTIVE_FRAME ActiveFrame;          /* FB0h */
    PVOID FlsData;                          /* FB4h */
    UCHAR SafeThunkCall;                    /* FB8h */
    UCHAR BooleanSpare[3];                  /* FB9h */
} TEB, *PTEB; 

FS:0指向线程环境块TEB；
FS:[0]指向当前线程的结构化异常处理结构(SEH)；

FS:0指向TEB的理解应该是:
TEB结构存放于FS段从0开始的位置，整个TEB结构数据在FS段中；

FS:[0]指向当前线程的结构化异常处理结构的理解应该是:
在FS:0所指向的TEB结构中，第一个元素指向当前线程的结构化异常处理结构，而这个结构存在与DS段中；