117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/* This file is part of the GDB simulators.
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Copyright (C) 1997, Free Software Foundation
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Condtributed by Cyngnus Solutions.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "sim-main.h"
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#include "idecode.h"
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#include <signal.h>
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void
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engine_init (SIM_DESC sd)
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{
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memset (&STATE_CPU (sd, 0)->reg, 0, sizeof STATE_CPU (sd, 0)->reg);
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memset (&STATE_CPU (sd, 0)->cia, 0, sizeof STATE_CPU (sd, 0)->cia);
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CPU_STATE (STATE_CPU (sd, 0)) = sd;
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}
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/* Mechanisms for stopping/restarting the simulation */
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void
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engine_error (SIM_DESC sd,
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instruction_address cia,
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const char *fmt,
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...)
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{
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va_list ap;
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va_start (ap, fmt);
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sim_io_evprintf (sd, fmt, ap);
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va_end (ap);
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if (sd->halt_ok)
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{
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sim_io_printf (sd, "\n");
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engine_halt (sd, cia, sim_signalled, SIGABRT);
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}
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else
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sim_io_error (sd, " - aborting simulation");
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}
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void
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engine_halt (SIM_DESC sd,
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instruction_address cia,
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enum sim_stop reason,
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int siggnal)
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{
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if (!sd->halt_ok)
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sim_io_error (sd, "engine_halt - bad longjmp");
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sd->reason = reason;
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sd->siggnal = siggnal;
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sd->halt_ok = 0;
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sd->restart_ok = 0;
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sd->cpu.cia = cia;
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longjmp (sd->path_to_halt, 1);
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}
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void
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engine_restart (SIM_DESC sd,
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instruction_address cia)
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{
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if (!sd->restart_ok)
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sim_io_error (sd, "engine_restart - bad longjmp");
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sd->restart_ok = 0;
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sd->cpu.cia = cia;
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longjmp(sd->path_to_restart, 1);
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}
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void
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engine_run_until_stop (SIM_DESC sd,
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volatile int *keep_running)
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{
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if (!setjmp (sd->path_to_halt))
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{
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instruction_address cia;
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sd->halt_ok = 1;
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setjmp (sd->path_to_restart);
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sd->restart_ok = 1;
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cia = STATE_CPU (sd, 0)->cia;
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do
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{
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if (cia.ip == -1)
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{
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/* anulled instruction */
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cia.ip = cia.dp;
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cia.dp = cia.dp + sizeof (instruction_word);
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}
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else
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{
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instruction_word insn = IMEM (cia.ip);
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cia = idecode_issue (sd, insn, cia);
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}
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}
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while (*keep_running);
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engine_halt (sd, cia, sim_stopped, SIGINT);
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}
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}
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