MFi386: move rss() from db_interface.c to cpufunc.h

sys/amd64/amd64/db_interface.c

@@ -57,18 +57,6 @@ db_regs_t ddb_regs;
 
 static jmp_buf	db_global_jmpbuf;
 
-static __inline u_short
-rss(void)
-{
-	u_short ss;
-#ifdef __GNUC__
-	__asm __volatile("mov %%ss,%0" : "=r" (ss));
-#else
-	ss = 0; /* XXXX Fix for other compilers. */
-#endif
-	return ss;
-}
-
 /*
  *  kdb_trap - field a TRACE or BPT trap
  */

sys/amd64/include/cpufunc.h

@@ -498,6 +498,14 @@ rgs(void)
 	return (sel);
 }
 
+static __inline u_int
+rss(void)
+{
+	u_int sel;
+	__asm __volatile("movl %%ss,%0" : "=rm" (sel));
+	return (sel);
+}
+
 static __inline void
 load_ds(u_int sel)
 {