BinSkim BA2014 compatibility with the new Arm64EC files

[shaopeng-gh]

User report that BinSkim BA2014 could have compatibility issue with the new Arm64EC files

https://learn.microsoft.com/en-us/windows/arm/arm64ec-build#msbuild-projects
With the HelloWorld app created using above guide, binskim complain about the function noCheckBuffers.
(Some other functions could be reported as well, e.g. _mm_setcsr)

This issue is created to investigate if improvements can be made.

#include
<immintrin.h>


using
namespace
std;


typedef
struct {
   
int
x[20];
}
BUFFER;
static
__declspec(safebuffers)
   
int
noCheckBuffers() {
   
BUFFER
ncb;
   
for(int
i
=0;
i<20;i++){
       
cout
<<
ncb.x[i];
    }
   
return
0;
}


int
main()
{
    // try my own function
   
noCheckBuffers();


    // try the same function as in the bug report
   
_mm_setcsr(555);
   
unsigned
int
a
=
_mm_getcsr();
   
cout
<<
a
<<
endl;
   
return
0;
}