/* This file is part of the program psim. Copyright (C) 1994-1995, Andrew Cagney This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include /* FIXME - should be machine dependant version */ #include #include #include "basics.h" #include "psim.h" #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #else #ifdef HAVE_STRINGS_H #include #endif #endif #include "../../gdb/defs.h" #include "devices.h" #include "../../gdb/remote-sim.h" #include "../../gdb/callback.h" /* Structures used by the simulator, for gdb just have static structures */ static psim *simulator; static char *register_names[] = REGISTER_NAMES; static int print_info = 0; void sim_open (char *args) { int i; /* trace the call */ TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)")); if (args) { char **argv = buildargv(args); int argp = 0; int argc; for (argc = 0; argv[argc]; argc++); while (argp < argc) { if (*argv[argp] != '-') error ("Argument is not an option '%s'", argv[argp]); else { /* check arguments -- note, main.c also contains argument processing code for the standalone emulator. */ char *p = argv[argp] + 1; while (*p != '\0') { switch (*p) { default: printf_filtered("Usage:\n\ttarget sim [ -t ]\n"); trace_usage(); error (""); break; case 't': argp += 1; if (argv[argp] == NULL) error("Missing option for -t\n"); trace_option(argv[argp]); /* better fail if NULL */ break; case 'I': print_info = 1; break; } p += 1; } } argp += 1; } } /* do something */ TRACE(trace_tbd, ("sim_open() - TBD - should parse the arguments\n")); TRACE(trace_tbd, ("sim_open() - TBD - can not create simulator here as do not have description of it\n")); } void sim_close (int quitting) { TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting)); if (print_info) psim_print_info (simulator, 1); /* nothing to do */ } int sim_load (char *prog, int from_tty) { char **argv; TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n", prog, from_tty)); ASSERT(prog != NULL); /* parse the arguments, assume that the file is argument 0 */ argv = buildargv(prog); ASSERT(argv != NULL && argv[0] != NULL); /* create the simulator */ TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n")); simulator = psim_create(argv[0]); /* bring in all the data section */ psim_init(simulator); /* release the arguments */ freeargv(argv); /* `I did it my way' */ return 0; } void sim_kill (void) { TRACE(trace_gdb, ("sim_kill(void) called\n")); /* do nothing, nothing to do */ } int sim_read (SIM_ADDR mem, unsigned char *buf, int length) { int result = psim_read_memory(simulator, MAX_NR_PROCESSORS, buf, mem, length); TRACE(trace_gdb, ("sim_read(mem=0x%x, buf=0x%x, length=%d) = %d\n", mem, buf, length, result)); return result; } int sim_write (SIM_ADDR mem, unsigned char *buf, int length) { int result = psim_write_memory(simulator, MAX_NR_PROCESSORS, buf, mem, length, 1/*violate_ro*/); TRACE(trace_gdb, ("sim_write(mem=0x%x, buf=0x%x, length=%d) = %d\n", mem, buf, length, result)); return result; } void sim_fetch_register (int regno, unsigned char *buf) { if (simulator == NULL) { return; } TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%x)\n", regno, register_names[regno], buf)); psim_read_register(simulator, MAX_NR_PROCESSORS, buf, register_names[regno], raw_transfer); } void sim_store_register (int regno, unsigned char *buf) { if (simulator == NULL) return; TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%x)\n", regno, register_names[regno], buf)); psim_write_register(simulator, MAX_NR_PROCESSORS, buf, register_names[regno], raw_transfer); } void sim_info (int verbose) { TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose)); psim_print_info (simulator, verbose); } void sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp) { unsigned_word entry_point = start_address; TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n", start_address)); psim_init(simulator); psim_stack(simulator, argv, envp); psim_write_register(simulator, -1 /* all start at same PC */, &entry_point, "pc", cooked_transfer); } static volatile int sim_should_run; void sim_stop_reason (enum sim_stop *reason, int *sigrc) { psim_status status = psim_get_status(simulator); switch (CURRENT_ENVIRONMENT) { case USER_ENVIRONMENT: case VIRTUAL_ENVIRONMENT: switch (status.reason) { case was_continuing: *reason = sim_stopped; *sigrc = SIGTRAP; if (sim_should_run) { error("sim_stop_reason() unknown reason for halt\n"); } break; case was_trap: *reason = sim_stopped; *sigrc = SIGTRAP; break; case was_exited: *reason = sim_exited; *sigrc = 0; break; case was_signalled: *reason = sim_signalled; *sigrc = status.signal; break; } break; case OPERATING_ENVIRONMENT: *reason = sim_stopped; *sigrc = SIGTRAP; break; default: error("sim_stop_reason() - unknown environment\n"); } TRACE(trace_gdb, ("sim_stop_reason(reason=0x%x(%d), sigrc=0x%x(%d))\n", reason, *reason, sigrc, *sigrc)); } /* Run (or resume) the program. */ static void sim_ctrl_c() { sim_should_run = 0; } void sim_resume (int step, int siggnal) { void (*prev) (); unsigned_word program_counter; TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n", step, siggnal)); prev = signal(SIGINT, sim_ctrl_c); sim_should_run = 1; if (step) psim_step(simulator); else psim_run_until_stop(simulator, &sim_should_run); signal(SIGINT, prev); } void sim_do_command(char *cmd) { TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", cmd)); } void sim_set_callbacks (host_callback *callback) { TRACE(trace_gdb, ("sim_set_callbacks called\n")); } /****/ void * zalloc(long size) { void *memory = (void*)xmalloc(size); if (memory == NULL) error("xmalloc failed\n"); bzero(memory, size); return memory; } void zfree(void *data) { mfree(NULL, data); }