tests/tcg/aarch64/mte-1.c

   1 /*
   2  * Memory tagging, basic pass cases.
   3  *
   4  * Copyright (c) 2021 Linaro Ltd
   5  * SPDX-License-Identifier: GPL-2.0-or-later
   6  */
   7
   8 #include "mte.h"
   9
  10 int main(int ac, char **av)
  11 {
  12     int *p0, *p1, *p2;
  13     long c;
  14
  15     enable_mte(PR_MTE_TCF_NONE);
  16     p0 = alloc_mte_mem(sizeof(*p0));
  17
  18     asm("irg %0,%1,%2" : "=r"(p1) : "r"(p0), "r"(1));
  19     assert(p1 != p0);
  20     asm("subp %0,%1,%2" : "=r"(c) : "r"(p0), "r"(p1));
  21     assert(c == 0);
  22
  23     asm("stg %0, [%0]" : : "r"(p1));
  24     asm("ldg %0, [%1]" : "=r"(p2) : "r"(p0), "0"(p0));
  25     assert(p1 == p2);
  26
  27     return 0;
  28 }