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package body Hypervisor_Check is
function CPUID (Arg : Unsigned_32) return CPUID_Registers is
eax, ebx, ecx, edx : Unsigned_32;
begin
Asm("cpuid",
Outputs => (Unsigned_32'Asm_Output ("=a", eax),
Unsigned_32'Asm_Output ("=b", ebx),
Unsigned_32'Asm_Output ("=c", ecx),
Unsigned_32'Asm_Output ("=d", edx)),
Inputs => Unsigned_32'Asm_Input ("a", Arg));
return (eax, ebx, ecx, edx);
end CPUID;
function String_of_U32 (Arg : Unsigned_32) return Unbounded_String is
Word : Unsigned_32;
Result : Unbounded_String;
begin
Word := Arg;
while Word > 0 loop
Append (Result, Character'Val (Word and 16#FF#));
Word := Shift_Right (Word, 8);
end loop;
return Result;
end String_of_U32;
function Get_Vendor_String return Unbounded_String is
Vendor_String : Unbounded_String;
Registers : CPUID_Registers;
begin
Registers := CPUID (Hypervisor_Leaf);
Vendor_String := String_of_U32 (Registers(2)) &
String_of_U32 (Registers(3)) &
String_of_U32 (Registers(4));
return Vendor_String;
end Get_Vendor_String;
end Hypervisor_Check;
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