readgsbyte-readgsdword-readgsqword-readgsword.md

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Learn more about: __readgsbyte, __readgsdword, __readgsqword, __readgsword	__readgsbyte, __readgsdword, __readgsqword, __readgsword	09/02/2019	__readgsbyte __readgsdword __readgsqword __readgsword	__readgsword intrinsic __readgsdword intrinsic __readgsqword intrinsic __readgsbyte intrinsic	f822632d-854c-4558-a71b-cdfc3eea2236

__readgsbyte, __readgsdword, __readgsqword, __readgsword

Microsoft Specific

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

Syntax

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

Parameters

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

Return value

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].

Requirements

Intrinsic	Architecture
__readgsbyte	x64
__readgsdword	x64
__readgsqword	x64
__readgsword	x64

Header file <intrin.h>

Remarks

These routines are only available as an intrinsic.

END Microsoft Specific

See also

__writegsbyte, __writegsdword, __writegsqword, __writegsword
Compiler intrinsics