arm64 detour throw 0xC000001D: Illegal Instruction. when call the real fn

[hereafter]

the detour works fine with x64 builds.
however when i switch it to arm64, i got 0xC000001D: Illegal Instruction.
when calling the RealFn

setup with
::DetourAttach(&(LPVOID&)RealFn, HookFn);

when calling the RealFn
HookFn()
{
RealFn();
}

unhandled exception 0xC000001D: Illegal Instruction.

Any idea what's up with that?

[cnbluefire]

I am hooking CreateWindowExW, and encounter the same problem

[LeoDavidson]

I don't know if this will be the issue, but make sure your replacement function uses the correct calling convention. ARM64 has two conventions, based on this OldNewThing post:

https://devblogs.microsoft.com/oldnewthing/20220823-00/?p=107041

Quick! Click the link before Microsoft break every URL pointing to every developer blogs again, like they do every few months! :-)

x64 only has one calling convention for everything, which I have seen mask mismatches until you try an x86 build (or an ARM64, I suspect).

[sylveon]

If you remove the cast to (LPVOID&) the template overload should catch these mistakes.

[kimjw0820]

I have the same problem.
Have you solved the x64 process issue on ARM64?