cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

exec_target.c (768B)


      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}