stage1 支持指针运算 提供新的类型检查计算

stage0/spl_syscall.c

@@ -167,6 +167,9 @@ SYSCALL_2(vm_strcmp, const char *, const char *, strcmp(a1, a2))
 /* vm_memcpy - copy memory, returns dst */
 SYSCALL_3(vm_memcpy, void *, const void *, size_t, (memcpy(a1, a2, a3), (uintptr_t)a1))
 
+/* vm_memcmp - compare two memory */
+SYSCALL_3(vm_memcmp, void *, const void *, size_t, (memcmp(a1, a2, a3), (uintptr_t)a1))
+
 static spl_vm_val_t vm_printf(int nargs, spl_vm_val_t *args) {
     if (nargs <= 0)
         return 0;
@@ -387,6 +390,7 @@ void spl_syscall_register(spl_prog_t *prog) {
         {"vm_strlen", 0, vm_strlen},
         {"vm_strcmp", 0, vm_strcmp},
         {"vm_memcpy", 0, vm_memcpy},
+        {"vm_memcmp", 0, vm_memcmp},
         {"vm_printf", 0, vm_printf},
         /* VM operations (comptime) */
         {"vm_new", 0, vm_new},