351 lines
7.4 KiB
C
351 lines
7.4 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
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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 <signal.h> /* FIXME - should be machine dependant version */
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#include <stdarg.h>
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#include <ctype.h>
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#include "cpu.h"
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#include "psim.h"
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#include "options.h"
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#include "../../gdb/defs.h"
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#include "devices.h"
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#include "../../gdb/remote-sim.h"
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#include "../../gdb/callback.h"
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/* Structures used by the simulator, for gdb just have static structures */
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static psim *simulator;
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static char *register_names[] = REGISTER_NAMES;
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static int print_info = 0;
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void
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sim_open (char *args)
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{
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/* trace the call */
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TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)"));
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if (args) {
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char **argv = buildargv(args);
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int argp = 0;
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int argc;
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for (argc = 0; argv[argc]; argc++);
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while (argp < argc) {
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if (*argv[argp] != '-')
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error ("Argument is not an option '%s'", argv[argp]);
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else {
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/* check arguments -- note, main.c also contains argument processing
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code for the standalone emulator. */
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char *p = argv[argp] + 1;
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while (*p != '\0') {
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switch (*p) {
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default:
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printf_filtered("Usage:\n\ttarget sim [ -t <trace-option> ] [-m model] [-i] [-I]\n");
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trace_usage();
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error ("");
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break;
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case 't':
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if (p[1])
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trace_option(p+1);
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else {
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argp += 1;
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if (argv[argp] == NULL)
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error("Missing <trace> option for -t\n");
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else
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trace_option(argv[argp]);
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}
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break;
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case 'm':
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if (p[1])
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model_set(p+1);
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else {
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argp += 1;
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if (argv[argp] == NULL)
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error("Missing <trace> option for -t\n");
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else
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model_set(argv[argp]);
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}
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break;
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case 'i':
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print_info = 1;
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break;
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case 'I':
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print_info = 2;
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break;
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}
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p += 1;
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}
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}
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argp += 1;
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}
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}
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if (ppc_trace[trace_opts])
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print_options ();
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/* do something */
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TRACE(trace_tbd, ("sim_open() - TBD - should parse the arguments\n"));
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TRACE(trace_tbd, ("sim_open() - TBD - can not create simulator here as do not have description of it\n"));
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}
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void
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sim_close (int quitting)
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{
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TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
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if (print_info)
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psim_print_info (simulator, print_info);
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/* nothing to do */
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}
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int
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sim_load (char *prog, int from_tty)
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{
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char **argv;
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TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
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prog, from_tty));
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ASSERT(prog != NULL);
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/* parse the arguments, assume that the file is argument 0 */
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argv = buildargv(prog);
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ASSERT(argv != NULL && argv[0] != NULL);
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/* create the simulator */
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TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
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simulator = psim_create(argv[0]);
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/* bring in all the data section */
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psim_init(simulator);
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/* release the arguments */
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freeargv(argv);
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/* `I did it my way' */
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return 0;
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}
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void
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sim_kill (void)
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{
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TRACE(trace_gdb, ("sim_kill(void) called\n"));
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/* do nothing, nothing to do */
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}
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int
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sim_read (SIM_ADDR mem, unsigned char *buf, int length)
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{
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int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
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buf, mem, length);
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TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
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(long)mem, (long)buf, length, result));
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return result;
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}
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int
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sim_write (SIM_ADDR mem, unsigned char *buf, int length)
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{
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int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
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buf, mem, length,
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1/*violate_ro*/);
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TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
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(long)mem, (long)buf, length, result));
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return result;
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}
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void
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sim_fetch_register (int regno, unsigned char *buf)
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{
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if (simulator == NULL) {
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return;
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}
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TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
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regno, register_names[regno], (long)buf));
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psim_read_register(simulator, MAX_NR_PROCESSORS,
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buf, register_names[regno],
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raw_transfer);
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}
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void
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sim_store_register (int regno, unsigned char *buf)
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{
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if (simulator == NULL)
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return;
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TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
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regno, register_names[regno], (long)buf));
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psim_write_register(simulator, MAX_NR_PROCESSORS,
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buf, register_names[regno],
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raw_transfer);
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}
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void
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sim_info (int verbose)
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{
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TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
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psim_print_info (simulator, verbose);
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}
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void
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sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
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{
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unsigned_word entry_point = start_address;
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TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
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start_address));
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psim_init(simulator);
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psim_stack(simulator, argv, envp);
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psim_write_register(simulator, -1 /* all start at same PC */,
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&entry_point, "pc", cooked_transfer);
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}
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static volatile int sim_should_run;
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void
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sim_stop_reason (enum sim_stop *reason, int *sigrc)
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{
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psim_status status = psim_get_status(simulator);
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switch (CURRENT_ENVIRONMENT) {
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case USER_ENVIRONMENT:
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case VIRTUAL_ENVIRONMENT:
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switch (status.reason) {
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case was_continuing:
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*reason = sim_stopped;
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*sigrc = SIGTRAP;
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if (sim_should_run) {
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error("sim_stop_reason() unknown reason for halt\n");
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}
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break;
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case was_trap:
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*reason = sim_stopped;
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*sigrc = SIGTRAP;
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break;
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case was_exited:
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*reason = sim_exited;
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*sigrc = 0;
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break;
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case was_signalled:
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*reason = sim_signalled;
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*sigrc = status.signal;
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break;
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}
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break;
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case OPERATING_ENVIRONMENT:
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*reason = sim_stopped;
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*sigrc = SIGTRAP;
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break;
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default:
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error("sim_stop_reason() - unknown environment\n");
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}
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TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
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(long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
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}
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/* Run (or resume) the program. */
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static void
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sim_ctrl_c()
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{
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sim_should_run = 0;
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}
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void
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sim_resume (int step, int siggnal)
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{
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void (*prev) ();
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TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
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step, siggnal));
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prev = signal(SIGINT, sim_ctrl_c);
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sim_should_run = 1;
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if (step)
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psim_step(simulator);
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else
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psim_run_until_stop(simulator, &sim_should_run);
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signal(SIGINT, prev);
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}
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void
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sim_do_command(char *cmd)
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{
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TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", cmd));
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}
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void
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sim_set_callbacks (host_callback *callback)
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{
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TRACE(trace_gdb, ("sim_set_callbacks called\n"));
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}
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/****/
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void *
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zalloc(long size)
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{
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void *memory = (void*)xmalloc(size);
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if (memory == NULL)
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error("xmalloc failed\n");
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bzero(memory, size);
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return memory;
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}
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void zfree(void *data)
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{
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mfree(NULL, data);
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}
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