How to declare assembly function with dynamic arguments in C like in C-CodePudding

I have some C code and I want to port it to c , the problem is that in C I can't use an assembly function due to it's dynamic use

C version

extern asmFunc(); // C function prototype version

//actual use example
asmFunc(var1,ptr2,HANDLE); 
asmFunc(ptr4,var2,NULL,eg ...); //everything works

C version

extern "C" VOID asmFunc(); // C   function prototype version

//actual use example
asmFunc(var1,ptr2,HANDLE); // E0140 too many arguments in function call
asmFunc(ptr4,var2,NULL,eg ...); // E0140 too many arguments in function call

The Assembly function is declared in a separate asm file and it uses direct syscalls from ntdll.dll's functions, that's why it requires dynamic arguments

How to make it work?

CodePudding user response：

Use ... in the argument list to specify the function is a variadic function taking unspecified arguments, eg:

extern "C" VOID asmFunc(...); // C   function prototype version

//actual use example
asmFUNC(var1,ptr2,HANDLE);
asmFUNC(ptr4,var2,NULL,eg);