cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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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
     10int 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}