projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 15c16493 AC |
1 | /* This file is part of the GDB simulators. |
| 2 | ||
| 3 | Copyright (C) 1997, Free Software Foundation | |
| 4 | Condtributed by Cyngnus Solutions. | |
| 5 | ||
| 6 | This program is free software; you can redistribute it and/or modify | |
| 7 | it under the terms of the GNU General Public License as published by | |
| 8 | the Free Software Foundation; either version 2 of the License, or | |
| 9 | (at your option) any later version. | |
| 10 | ||
| 11 | This program 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 | |
| 14 | GNU General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU General Public License | |
| 17 | along with this program; if not, write to the Free Software | |
| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 19 | ||
| 20 | */ | |
| 21 | ||
| 22 | ||
| 23 | ||
| 24 | #include "sim-main.h" | |
| 25 | ||
| 26 | #include "idecode.h" | |
| 27 | ||
| 28 | #include <signal.h> | |
| 29 | ||
| 30 | void | |
| 31 | engine_init (SIM_DESC sd) | |
| 32 | { | |
| 33 | memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg); | |
| 34 | memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia); | |
| 35 | CPU_STATE (STATE_CPU (sd, 0)) = sd; | |
| 36 | } | |
| 37 | ||
| 38 | ||
| 39 | /* Mechanisms for stopping/restarting the simulation */ | |
| 40 | ||
| 41 | void | |
| 42 | engine_error (SIM_DESC sd, | |
| 43 | instruction_address cia, | |
| 44 | const char *fmt, | |
| 45 | ...) | |
| 46 | { | |
| 47 | va_list ap; | |
| 48 | va_start (ap, fmt); | |
| 49 | sim_io_evprintf (sd, fmt, ap); | |
| 50 | va_end (ap); | |
| 51 | ||
| 52 | if (sd->halt_ok) | |
| 53 | { | |
| 54 | sim_io_printf (sd, "\n"); | |
| 55 | engine_halt (sd, cia, sim_signalled, SIGABRT); | |
| 56 | } | |
| 57 | else | |
| 58 | sim_io_error (sd, " - aborting simulation"); | |
| 59 | } | |
| 60 | ||
| 61 | void | |
| 62 | engine_halt (SIM_DESC sd, | |
| 63 | instruction_address cia, | |
| 64 | enum sim_stop reason, | |
| 65 | int siggnal) | |
| 66 | { | |
| 67 | if (!sd->halt_ok) | |
| 68 | sim_io_error (sd, "engine_halt - bad longjmp"); | |
| 69 | sd->reason = reason; | |
| 70 | sd->siggnal = siggnal; | |
| 71 | sd->halt_ok = 0; | |
| 72 | sd->restart_ok = 0; | |
| 73 | sd->cpu.cia = cia; | |
| 74 | longjmp (sd->path_to_halt, 1); | |
| 75 | } | |
| 76 | ||
| 77 | void | |
| 78 | engine_restart (SIM_DESC sd, | |
| 79 | instruction_address cia) | |
| 80 | { | |
| 81 | if (!sd->restart_ok) | |
| 82 | sim_io_error (sd, "engine_restart - bad longjmp"); | |
| 83 | sd->restart_ok = 0; | |
| 84 | sd->cpu.cia = cia; | |
| 85 | longjmp(sd->path_to_restart, 1); | |
| 86 | } | |
| 87 | ||
| 88 | ||
| 89 | void | |
| 90 | engine_run_until_stop (SIM_DESC sd, | |
| 91 | volatile int *keep_running) | |
| 92 | { | |
| 93 | if (!setjmp (sd->path_to_halt)) | |
| 94 | { | |
| 95 | instruction_address cia; | |
| 96 | sd->halt_ok = 1; | |
| 97 | setjmp (sd->path_to_restart); | |
| 98 | sd->restart_ok = 1; | |
| 99 | cia = STATE_CPU (sd, 0)->cia; | |
| 100 | do | |
| 101 | { | |
| 102 | if (cia.ip == -1) | |
| 103 | { | |
| 104 | /* anulled instruction */ | |
| 105 | cia.ip = cia.dp; | |
| 106 | cia.dp = cia.dp + sizeof (instruction_word); | |
| 107 | } | |
| 108 | else | |
| 109 | { | |
| 110 | instruction_word insn = IMEM (cia.ip); | |
| 111 | cia = idecode_issue (sd, insn, cia); | |
| 112 | } | |
| 113 | } | |
| 114 | while (*keep_running); | |
| 115 | engine_halt (sd, cia, sim_stopped, SIGINT); | |
| 116 | } | |
| 117 | } |