Calling DLL exported function - Issue with arguments

[rudeus greyrat]

I have a DLL compiled with CGO. It exports 3 functions:

```

//export Run1

func Run(text string) (stdout []byte, stderr []byte, err error) {
fmt.Println(text)
return nil, nil, nil
}

//export Run2
func Run2() (stdout []byte, stderr []byte, err error) {
       fmt.Println("Heyyyyy")

        fmt.Println(111111)

return nil, nil, nil
}

//export Run3
func Run3(a int) (stdout []byte, stderr []byte, err error) {
        fmt.Println(a)
return nil, nil, nil
}
```

In a seperate Go file I import the DLL and try to call the exported function.

For Run2 everything works

```

s = uinptr(ADDRESS_RUN2)

syscall.SyscallN(s)

```

It prints Heyyyyy and 1111111 in my output

For Run3, I am not sure how to pass the argument to SyscallN.

```

  

    s = uinptr(ADDRESS_RUN3)

    a := 999999999
    syscall.SyscallN(s, uintptr(unsafe.Pointer(&a)))  ----> Fail (random Number printed)

    a := 999999999
    syscall.SyscallN(s, uintptr(unsafe.Pointer(a)))  -----> Fail (random Number printed)

```

For Run1, it get worse as sometimes I get C0000005 error as I use the string elsewhere:

```

        s = uinptr(ADDRESS_RUN1)

cmdBytes := []byte(torun)
cmdBytes = append(cmdBytes, 0)
ptr := unsafe.Pointer(&cmdBytes[0])
        syscall.SyscallN(d, uintptr(ptr))

```

Any help please ??

[rudeus greyrat]

Ok, seem to have got it,

I need to change function signature in the DLL to be pointers instead of go objects.

Ex.

```

//export Run1

func Run1(ptext *byte) (stdout []byte, stderr []byte, err error) {
          text := windows.BytePtrToString(ptext)

         fmt.Println(text)
return nil, nil, nil
}

```

Weird but ok...