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Adding __fastfail encoding for Windows ARM64 #759

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Feb 1, 2019
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Adding __fastfail encoding for Windows ARM64 #759

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5 changes: 3 additions & 2 deletions docs/intrinsics/fastfail.md
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,7 @@ Internally, `__fastfail` is implemented by using several architecture-specific m
|x86|int 0x29|ecx|
|x64|int 0x29|rcx|
|ARM|Opcode 0xDEFB|r0|
|ARM64|Opcode 0xF003|x0|

A fast fail request is self-contained and typically requires just two instructions to execute. Once a fast fail request has been executed the kernel then takes the appropriate action. In user-mode code, there are no memory dependencies beyond the instruction pointer itself when a fast fail event is raised. This maximizes its reliability even if there is severe memory corruption.

Expand All @@ -50,12 +51,12 @@ Support for the native fast fail mechanism began in Windows 8. Windows operating

|Intrinsic|Architecture|
|---------------|------------------|
|`__fastfail`|x86, x64, ARM|
|`__fastfail`|x86, x64, ARM, ARM64|

**Header file** \<intrin.h>

**END Microsoft Specific**

## See Also

[Compiler Intrinsics](../intrinsics/compiler-intrinsics.md)
[Compiler Intrinsics](../intrinsics/compiler-intrinsics.md)