# _readgsbase_u32(), _readgsbase_u64()

Read the value of the GS base register. Both intrinsics are mapped to `RDGSBASE` instruction.

## Syntax

extern unsigned int _readgsbase_u32();

extern unsigned int _readgsbase_u32();

## Description

These intrinsics read the value of the GS base register.

## Returns

The value of the GS base segment register.

Parent topic: Intrinsics that Allow Reading from and Writing to the FS Base and GS Base Registers