tests/tcg/aarch64/semicall.h

   1 /*
   2  * Semihosting Tests - AArch64 helper
   3  *
   4  * Copyright (c) 2019
   5  * Written by Alex Bennée <alex.bennee@linaro.org>
   6  *
   7  * SPDX-License-Identifier: GPL-3.0-or-later
   8  */
   9
  10 uintptr_t __semi_call(uintptr_t type, uintptr_t arg0)
  11 {
  12     register uintptr_t t asm("x0") = type;
  13     register uintptr_t a0 asm("x1") = arg0;
  14     asm("hlt 0xf000"
  15         : "=r" (t)
  16         : "r" (t), "r" (a0));
  17     return t;
  18 }