| 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 | } |