qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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mte-1.c (564B)

      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 }