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

iclass.c (2541B)

      1/*
      2 *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
      3 *
      4 *  This program is free software; you can redistribute it and/or modify
      5 *  it under the terms of the GNU General Public License as published by
      6 *  the Free Software Foundation; either version 2 of the License, or
      7 *  (at your option) any later version.
      8 *
      9 *  This program is distributed in the hope that it will be useful,
     10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     12 *  GNU General Public License for more details.
     13 *
     14 *  You should have received a copy of the GNU General Public License
     15 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
     16 */
     17
     18#include "qemu/osdep.h"
     19#include "iclass.h"
     20
     21static const SlotMask iclass_info[] = {
     22
     23#define DEF_PP_ICLASS32(TYPE, SLOTS, UNITS) \
     24    [ICLASS_FROM_TYPE(TYPE)] = SLOTS_##SLOTS,
     25#define DEF_EE_ICLASS32(TYPE, SLOTS, UNITS) \
     26    [ICLASS_FROM_TYPE(TYPE)] = SLOTS_##SLOTS,
     27#include "imported/iclass.def"
     28#undef DEF_PP_ICLASS32
     29#undef DEF_EE_ICLASS32
     30};
     31
     32SlotMask find_iclass_slots(Opcode opcode, int itype)
     33{
     34    /* There are some exceptions to what the iclass dictates */
     35    if (GET_ATTRIB(opcode, A_ICOP)) {
     36        return SLOTS_2;
     37    } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT0ONLY)) {
     38        return SLOTS_0;
     39    } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT1ONLY)) {
     40        return SLOTS_1;
     41    } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT2ONLY)) {
     42        return SLOTS_2;
     43    } else if (GET_ATTRIB(opcode, A_RESTRICT_SLOT3ONLY)) {
     44        return SLOTS_3;
     45    } else if (GET_ATTRIB(opcode, A_COF) &&
     46               GET_ATTRIB(opcode, A_INDIRECT) &&
     47               !GET_ATTRIB(opcode, A_MEMLIKE) &&
     48               !GET_ATTRIB(opcode, A_MEMLIKE_PACKET_RULES)) {
     49        return SLOTS_2;
     50    } else if (GET_ATTRIB(opcode, A_RESTRICT_NOSLOT1)) {
     51        return SLOTS_0;
     52    } else if ((opcode == J2_trap0) ||
     53               (opcode == Y2_isync) ||
     54               (opcode == J2_pause) || (opcode == J4_hintjumpr)) {
     55        return SLOTS_2;
     56    } else if (GET_ATTRIB(opcode, A_CRSLOT23)) {
     57        return SLOTS_23;
     58    } else if (GET_ATTRIB(opcode, A_RESTRICT_PREFERSLOT0)) {
     59        return SLOTS_0;
     60    } else if (GET_ATTRIB(opcode, A_SUBINSN)) {
     61        return SLOTS_01;
     62    } else if (GET_ATTRIB(opcode, A_CALL)) {
     63        return SLOTS_23;
     64    } else if ((opcode == J4_jumpseti) || (opcode == J4_jumpsetr)) {
     65        return SLOTS_23;
     66    } else {
     67        return iclass_info[itype];
     68    }
     69}