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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bpt_helper.c (1175B)

      1/*
      2 *  i386 breakpoint helpers
      3 *
      4 *  Copyright (c) 2003 Fabrice Bellard
      5 *
      6 * This library is free software; you can redistribute it and/or
      7 * modify it under the terms of the GNU Lesser General Public
      8 * License as published by the Free Software Foundation; either
      9 * version 2.1 of the License, or (at your option) any later version.
     10 *
     11 * This library is distributed in the hope that it will be useful,
     12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14 * Lesser General Public License for more details.
     15 *
     16 * You should have received a copy of the GNU Lesser General Public
     17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
     18 */
     19
     20#include "qemu/osdep.h"
     21#include "cpu.h"
     22#include "exec/helper-proto.h"
     23#include "helper-tcg.h"
     24
     25void QEMU_NORETURN helper_single_step(CPUX86State *env)
     26{
     27#ifndef CONFIG_USER_ONLY
     28    check_hw_breakpoints(env, true);
     29    env->dr[6] |= DR6_BS;
     30#endif
     31    raise_exception(env, EXCP01_DB);
     32}
     33
     34void helper_rechecking_single_step(CPUX86State *env)
     35{
     36    if ((env->eflags & TF_MASK) != 0) {
     37        helper_single_step(env);
     38    }
     39}