llvm dev - Oct 2020 - I am trying to implement a c runtime in rust for msvc/windows.

But I don't know how to implement
__GSHandlerCheck
__security_check_cookie
__security_cookie

when using msvc to compiling debug code.

Who knows how to implement these three functions or possible alternatives.

-- 
         此致
礼
罗勇刚
Yours
    sincerely,
Yonggang Luo
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On Sat, Oct 10, 2020 at 11:21 PM 罗勇刚(Yonggang Luo) via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> But I don't know how to implement
> __GSHandlerCheck
> __security_check_cookie
> __security_cookie
>
> when using msvc to compiling debug code.
>
> Who knows how to implement these three functions or possible alternatives.
>
How fortunately I've been passing by and stumbled upon this thread. Here is
my implementation:

uintptr_t __security_cookie = 0xAABBCCDD;

void __fastcall __security_check_cookie(uintptr_t cookie)
{
    if (cookie != __security_cookie)
        __debugbreak();
}
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I think MSVC implements most of these in assembly. I'm not sure they all
conform to any standard calling convention.

On Sat, Oct 10, 2020 at 12:22 PM 罗勇刚(Yonggang Luo) via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> But I don't know how to implement
> __GSHandlerCheck
> __security_check_cookie
> __security_cookie
>
> when using msvc to compiling debug code.
>
> Who knows how to implement these three functions or possible alternatives.
>
> --
>          此致
> 礼
> 罗勇刚
> Yours
>     sincerely,
> Yonggang Luo
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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