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Update README.md
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gmh5225 committed Nov 10, 2023
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Expand Up @@ -11,13 +11,34 @@ libwindrv is a windows driver library for testing the llvm-msvc compiler when tu
- [ARM64 Kits](https://learn.microsoft.com/en-us/windows-hardware/drivers/develop/building-arm64-drivers)
- [llvm-msvc](https://github.com/backengineering/llvm-msvc/releases)

## How to enable Kernel CET
## How to enable Kernel CET?
```
reg add HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity /v Enabled /t REG_DWORD /d 1 /f
reg add HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\KernelShadowStacks /v Enabled /t REG_DWORD /d 1 /f
reg add HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\KernelShadowStacks /v AuditModeEnabled /t REG_DWORD /d 1 /f
```

## What does dump look like?
```
KERNEL_SECURITY_CHECK_FAILURE (139)
A kernel component has corrupted a critical data structure. The corruption
could potentially allow a malicious user to gain control of this machine.
Arguments:
Arg1: 0000000000000043, A call to the secure kernel to modify shadow stack values has failed.
Arg2: 0000000000000000, Address of the trap frame for the exception that caused the BugCheck
Arg3: fffff3876cf11970, Address of the exception record for the exception that caused the BugCheck
Arg4: 0000000000000000, Reserved
fffff387`6cf118c8 fffff805`4b148b9b : 00000000`00000139 00000000`00000043 00000000`00000000 fffff387`6cf11970 : nt!KeBugCheckEx
fffff387`6cf118d0 fffff805`4b0b886b : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!VslKernelShadowStackAssist+0xdb
fffff387`6cf11a70 fffff805`4b016b1d : fffff387`6cf11be0 fffff387`6cf12100 00000000`00000001 00000000`00001001 : nt!KxContextToKframes+0x198dcb
fffff387`6cf11ad0 fffff805`4ae06470 : ffffffff`ffffffff fffff387`6cf12490 00000000`00000001 fffff387`6cf11be0 : nt!KeContextToKframes+0x7d
fffff387`6cf11bb0 fffff805`4b02c0fc : 00000000`00000000 00000000`00000000 00000000`00000003 ffffffff`ffffffff : nt!KiDispatchException+0x1d0
fffff387`6cf122b0 fffff805`4b02aa05 : 00000000`00000000 fffff805`4ae74418 fffff387`6cf125c0 fffff805`4b16f127 : nt!KiExceptionDispatch+0x13c
fffff387`6cf12490 fffff805`6cdf5099 : ffffcc0e`ec7c4000 ffffcc0e`ed00957d ffffcc0e`eead9e30 00000000`497af2dc : nt!KiDebugServiceTrap+0x345
fffff387`6cf12620 ffffcc0e`ec7c4000 : ffffcc0e`ed00957d ffffcc0e`eead9e30 00000000`497af2dc fffff387`6cf10007 : testdrv1+0x5099
```


## Building win-x64 with llvm-msvc

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