Add (basic) tests for stat(), fgettype(), fgetmod()

src/file.asm

@@ -20,10 +20,10 @@ section .text
 ; Used registers:
 ;	rax*	(ret)
 ;	rdi*	(arg) Pointer to file
-;	rsi*	(arg) Pointer to statBuffer
+;	rsi*	arg for syscall NR_newfstatat
 ;	rdx*	arg for syscall NR_newfstatat
 ;	r10*	arg(flag) for syscall NR_newfstatat
-fstatat:
+stat:
 	sub	rsp, SIZE_QWORD
 	mov	rax, NR_newfstatat
 	mov	rdx, rsi
@@ -46,7 +46,7 @@ fgettype:
 	mov	rax, -EINVAL
 	ret
 	.buffok:
-	mov	eax, dword [rdi + ST_MODE]
+	mov	eax, [rdi + ST_MODE]
 	and	eax, 0xF000
 	ret