target/i386/tcg/bpt_helper.c

   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
  25 G_NORETURN void 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
  34 void helper_rechecking_single_step(CPUX86State *env)
  35 {
  36     if ((env->eflags & TF_MASK) != 0) {
  37         helper_single_step(env);
  38     }
  39 }