LXR linux/tools/testing/selftests/arm64/pauth/exec

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (C) 2020 ARM Limited
   3
   4#include <stdio.h>
   5#include <stdlib.h>
   6#include <sys/auxv.h>
   7
   8#include "helper.h"
   9
  10int main(void)
  11{
  12        struct signatures signed_vals;
  13        unsigned long hwcaps;
  14        size_t val;
  15
  16        fread(&val, sizeof(size_t), 1, stdin);
  17
  18        /* don't try to execute illegal (unimplemented) instructions) caller
  19         * should have checked this and keep worker simple
  20         */
  21        hwcaps = getauxval(AT_HWCAP);
  22
  23        if (hwcaps & HWCAP_PACA) {
  24                signed_vals.keyia = keyia_sign(val);
  25                signed_vals.keyib = keyib_sign(val);
  26                signed_vals.keyda = keyda_sign(val);
  27                signed_vals.keydb = keydb_sign(val);
  28        }
  29        signed_vals.keyg = (hwcaps & HWCAP_PACG) ?  keyg_sign(val) : 0;
  30
  31        fwrite(&signed_vals, sizeof(struct signatures), 1, stdout);
  32
  33        return 0;
  34}
  35