Win32 Thread Information Block
In computing, the Win32 Thread Information Block (TIB) is a data structure in Win32 on x86 that stores info about the currently running thread. While officially undocumented, many Win32 programs use it so it is effectively a part of the API.
The TIB can be accessed as an offset of segment register FS.
| Position | Length | Description |
|---|---|---|
| FS:[0x00] | 4 | Current Secure Exception Handling (SEH) frame |
| FS:[0x14] | 4 | Thread name |
| FS:[0x18] | 4 | Linear address of TIB |
| FS:[0x24] | 4 | Current thread ID |
| FS:[0x2C] | 4 | Linear address of the thread local storage array |
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