GetThreadSelectorEntry function (winbase.h)

Article
02/22/2024

Retrieves a descriptor table entry for the specified selector and thread.

Syntax

BOOL GetThreadSelectorEntry(
  [in]  HANDLE      hThread,
  [in]  DWORD       dwSelector,
  [out] LPLDT_ENTRY lpSelectorEntry
);

Parameters

[in] hThread

A handle to the thread containing the specified selector. The handle must have THREAD_QUERY_INFORMATION access. For more information, see Thread Security and Access Rights.

[in] dwSelector

The global or local selector value to look up in the thread's descriptor tables.

[out] lpSelectorEntry

A pointer to an LDT_ENTRY structure that receives a copy of the descriptor table entry if the specified selector has an entry in the specified thread's descriptor table. This information can be used to convert a segment-relative address to a linear virtual address.

Return value

If the function succeeds, the return value is nonzero. In that case, the structure pointed to by the lpSelectorEntry parameter receives a copy of the specified descriptor table entry.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

Remarks

GetThreadSelectorEntry is only functional on x86-based systems. For systems that are not x86-based, the function returns FALSE.

Debuggers use this function to convert segment-relative addresses to linear virtual addresses. The ReadProcessMemory and WriteProcessMemory functions use linear virtual addresses.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Target Platform	Windows
Header	winbase.h (include Windows.h)
Library	Kernel32.lib
DLL	Kernel32.dll