cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

exception_helper.c (1568B)

      1/*
      2 * OpenRISC exception helper routines
      3 *
      4 * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
      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/exec-all.h"
     23#include "exec/helper-proto.h"
     24#include "exception.h"
     25
     26void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
     27{
     28    OpenRISCCPU *cpu = env_archcpu(env);
     29
     30    raise_exception(cpu, excp);
     31}
     32
     33static void QEMU_NORETURN do_range(CPUOpenRISCState *env, uintptr_t pc)
     34{
     35    CPUState *cs = env_cpu(env);
     36
     37    cs->exception_index = EXCP_RANGE;
     38    cpu_loop_exit_restore(cs, pc);
     39}
     40
     41void HELPER(ove_cy)(CPUOpenRISCState *env)
     42{
     43    if (env->sr_cy) {
     44        do_range(env, GETPC());
     45    }
     46}
     47
     48void HELPER(ove_ov)(CPUOpenRISCState *env)
     49{
     50    if (env->sr_ov < 0) {
     51        do_range(env, GETPC());
     52    }
     53}
     54
     55void HELPER(ove_cyov)(CPUOpenRISCState *env)
     56{
     57    if (env->sr_cy || env->sr_ov < 0) {
     58        do_range(env, GETPC());
     59    }
     60}