target/i386/tcg/mem_helper.c

   1 /*
   2  *  x86 memory access 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 "exec/exec-all.h"
  24 #include "exec/cpu_ldst.h"
  25 #include "qemu/int128.h"
  26 #include "qemu/atomic128.h"
  27 #include "tcg/tcg.h"
  28 #include "helper-tcg.h"
  29
  30 void helper_boundw(CPUX86State *env, target_ulong a0, int v)
  31 {
  32     int low, high;
  33
  34     low = cpu_ldsw_data_ra(env, a0, GETPC());
  35     high = cpu_ldsw_data_ra(env, a0 + 2, GETPC());
  36     v = (int16_t)v;
  37     if (v < low || v > high) {
  38         if (env->hflags & HF_MPX_EN_MASK) {
  39             env->bndcs_regs.sts = 0;
  40         }
  41         raise_exception_ra(env, EXCP05_BOUND, GETPC());
  42     }
  43 }
  44
  45 void helper_boundl(CPUX86State *env, target_ulong a0, int v)
  46 {
  47     int low, high;
  48
  49     low = cpu_ldl_data_ra(env, a0, GETPC());
  50     high = cpu_ldl_data_ra(env, a0 + 4, GETPC());
  51     if (v < low || v > high) {
  52         if (env->hflags & HF_MPX_EN_MASK) {
  53             env->bndcs_regs.sts = 0;
  54         }
  55         raise_exception_ra(env, EXCP05_BOUND, GETPC());
  56     }
  57 }