Win32 Thread Information Block (TIB) is a data structure in Win32 on x86 that stores info about the currently running thread.
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Position Length Windows Versions Description
FS:[0x00] 4 Win9x and NT Current Structured Exception Handling (SEH) frame
FS:[0x04] 4 Win9x and NT Top of stack
FS:[0x08] 4 Win9x and NT Current bottom of stack
FS:[0x10] 4 NT Fiber data
FS:[0x14] 4 Win9x and NT Arbitrary data slot
FS:[0x18] 4 Win9x and NT Linear address of TIB
- - NT End of NT subsystem independent part
FS:[0x1C] 4 NT Environment Pointer
FS:[0x20] 4 NT Process ID
FS:[0x24] 4 NT Current thread ID
FS:[0x28] 4 NT Active RPC Handle
FS:[0x2C] 4 Win9x and NT Linear address of the thread-local storage array
FS:[0x30] 4 NT Linear address of Process Environment Block (PEB)
FS:[0x34] 4 NT Last error number
FS:[0x38] 4 NT Count of owned critical sections
FS:[0x3C] 4 NT Address of CSR Client Thread
FS:[0x40] 4 NT Win32 Thread Information
FS:[0x44] 124 NT,Wine Win32 client information (NT), user32 private data (Wine), 0x60 = LastError (Win95), 0x74 = LastError (WinME)
FS:[0xC0] 4 NT Reserved for Wow32
FS:[0xC4] 4 NT Current Locale
FS:[0xC8] 4 NT FP Software Status Register
FS:[0xCC] 216 NT,Wine Reserved for OS (NT), kernel32 private data (Wine)
FS:[0x124] 4 NT Pointer to KTHREAD (ETHREAD) structure
FS:[0x1A4] 4 NT Exception code
FS:[0x1A8] 18 NT Activation context stack
FS:[0x1BC] 24 NT,Wine Spare bytes (NT), ntdll private data (Wine)
FS:[0x1D4] 40 NT,Wine Reserved for OS (NT), ntdll private data (Wine)
FS:[0x1FC] 1248 NT,Wine GDI TEB Batch (OS), vm86 private data (Wine)
FS:[0x6DC] 4 NT GDI Region
FS:[0x6E0] 4 NT GDI Pen
FS:[0x6E4] 4 NT GDI Brush
FS:[0x6E8] 4 NT Real Process ID
FS:[0x6EC] 4 NT Real Thread ID
FS:[0x6F0] 4 NT GDI cached process handle
FS:[0x6F4] 4 NT GDI client process ID (PID)
FS:[0x6F8] 4 NT GDI client thread ID (TID)
FS:[0x6FC] 4 NT GDI thread locale information
FS:[0x700] 20 NT Reserved for user application
FS:[0x714] 1248 NT Reserved for GL
FS:[0xBF4] 4 NT Last Status Value
FS:[0xBF8] 214 NT Reserved for advapi32
FS:[0xE0C] 4 NT Pointer to deallocation stack
FS:[0xE10] 256 NT TLS slots, 4 byte per slot
FS:[0xF10] 8 NT TLS links (LIST_ENTRY structure)
FS:[0xF18] 4 NT VDM
FS:[0xF1C] 4 NT Reserved for RPC
Example in C inlined-assembly for 32-bit x86:
[code]// gcc (AT&T-style inline assembly).
void *getTIB()
{
