__readgsbyte, __readgsdword, __readgsqword, __readgsword


For the latest documentation on Visual Studio 2017 RC, see Visual Studio 2017 RC Documentation.

Microsoft Specific

Read memory from a location specified by an offset relative to the beginning of the GS segment.

unsigned char __readgsbyte(   
   unsigned long Offset   
unsigned short __readgsword(   
   unsigned long Offset   
unsigned long __readgsdword(   
   unsigned long Offset  
unsigned __int64 __readgsqword(   
   unsigned long Offset   


[in] Offset
The offset from the beginning of GS to read from.

The memory contents of the byte, word, double word, or quadword (as indicated by the name of the function called) at the location GS:[``Offset``].


Header file <intrin.h>

These intrinsics are only available in kernel mode, and the routines are only available as intrinsics.

__writegsbyte, __writegsdword, __writegsqword, __writegsword
Compiler Intrinsics