/* This file is part of the program psim. Copyright (C) 1994-1996, 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 "psim.h" #include "options.h" #undef printf_filtered /* blow away the mapping */ #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #else #ifdef HAVE_STRINGS_H #include #endif #endif #include "defs.h" #include "bfd.h" #include "callback.h" #include "remote-sim.h" /* Structures used by the simulator, for gdb just have static structures */ static psim *simulator; static device *root_device; static const char *register_names[] = REGISTER_NAMES; /* For communication between sim_load and sim_create_inferior. This can be made to go away, please do. */ static unsigned_word entry_point; SIM_DESC sim_open (SIM_OPEN_KIND kind, host_callback *callback, char **argv) { callbacks = callback; /* Note: The simulation is not created by sim_open() because complete information is not yet available */ /* trace the call */ TRACE(trace_gdb, ("sim_open called\n")); if (root_device != NULL) sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n"); root_device = psim_tree(); simulator = NULL; psim_options(root_device, argv + 1); if (ppc_trace[trace_opts]) print_options (); /* fudge our descriptor for now */ return (SIM_DESC) 1; } void sim_close (SIM_DESC sd, int quitting) { TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting)); if (ppc_trace[trace_print_info] && simulator != NULL) psim_print_info (simulator, ppc_trace[trace_print_info]); } SIM_RC sim_load (SIM_DESC sd, char *prog, bfd *abfd, 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], root_device); /* bring in all the data section */ psim_init(simulator); /* release the arguments */ freeargv(argv); /* get the start address */ if (abfd != NULL) entry_point = bfd_get_start_address (abfd); else { abfd = bfd_openr (argv[0], 0); if (abfd == NULL) error ("psim: can't open \"%s\": %s\n", argv[0], bfd_errmsg (bfd_get_error ())); if (!bfd_check_format (abfd, bfd_object)) { const char *errmsg = bfd_errmsg (bfd_get_error ()); bfd_close (abfd); error ("psim: \"%s\" is not an object file: %s\n", argv[0], errmsg); } entry_point = bfd_get_start_address (abfd); bfd_close (abfd); } return SIM_RC_OK; } void sim_kill (SIM_DESC sd) { TRACE(trace_gdb, ("sim_kill(void) called\n")); /* do nothing, nothing to do */ } int sim_read (SIM_DESC sd, 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%lx, buf=0x%lx, length=%d) = %d\n", (long)mem, (long)buf, length, result)); return result; } int sim_write (SIM_DESC sd, 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%lx, buf=0x%lx, length=%d) = %d\n", (long)mem, (long)buf, length, result)); return result; } void sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf) { if (simulator == NULL) { return; } TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n", regno, register_names[regno], (long)buf)); psim_read_register(simulator, MAX_NR_PROCESSORS, buf, register_names[regno], raw_transfer); } void sim_store_register (SIM_DESC sd, int regno, unsigned char *buf) { if (simulator == NULL) return; TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n", regno, register_names[regno], (long)buf)); psim_write_register(simulator, MAX_NR_PROCESSORS, buf, register_names[regno], raw_transfer); } void sim_info (SIM_DESC sd, int verbose) { TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose)); psim_print_info (simulator, verbose); } SIM_RC sim_create_inferior (SIM_DESC sd, char **argv, char **envp) { TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n", entry_point)); psim_init(simulator); psim_stack(simulator, argv, envp); psim_write_register(simulator, -1 /* all start at same PC */, &entry_point, "pc", cooked_transfer); return SIM_RC_OK; } void sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc) { psim_status status = psim_get_status(simulator); switch (status.reason) { case was_continuing: *reason = sim_stopped; if (status.signal == 0) *sigrc = SIGTRAP; else *sigrc = status.signal; break; case was_trap: *reason = sim_stopped; *sigrc = SIGTRAP; break; case was_exited: *reason = sim_exited; *sigrc = status.signal; break; case was_signalled: *reason = sim_signalled; *sigrc = status.signal; break; } TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n", (long)reason, (long)*reason, (long)sigrc, (long)*sigrc)); } /* Run (or resume) the program. */ int sim_stop (SIM_DESC sd) { psim_stop (simulator); return 1; } void sim_resume (SIM_DESC sd, int step, int siggnal) { TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n", step, siggnal)); if (step) { psim_step (simulator); } else { psim_run (simulator); } } void sim_do_command (SIM_DESC sd, char *cmd) { TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", cmd ? cmd : "(null)")); if (cmd != NULL) { char **argv = buildargv(cmd); psim_command(root_device, argv); freeargv(argv); } } /* Map simulator IO operations onto the corresponding GDB I/O functions. NB: Only a limited subset of operations are mapped across. More advanced operations (such as dup or write) must either be mapped to one of the below calls or handled internally */ static host_callback *callbacks; int sim_io_read_stdin(char *buf, int sizeof_buf) { switch (CURRENT_STDIO) { case DO_USE_STDIO: return callbacks->read_stdin(callbacks, buf, sizeof_buf); break; case DONT_USE_STDIO: return callbacks->read(callbacks, 0, buf, sizeof_buf); break; default: error("sim_io_read_stdin: unaccounted switch\n"); break; } return 0; } int sim_io_write_stdout(const char *buf, int sizeof_buf) { switch (CURRENT_STDIO) { case DO_USE_STDIO: return callbacks->write_stdout(callbacks, buf, sizeof_buf); break; case DONT_USE_STDIO: return callbacks->write(callbacks, 1, buf, sizeof_buf); break; default: error("sim_io_write_stdout: unaccounted switch\n"); break; } return 0; } int sim_io_write_stderr(const char *buf, int sizeof_buf) { switch (CURRENT_STDIO) { case DO_USE_STDIO: /* NB: I think there should be an explicit write_stderr callback */ return callbacks->write(callbacks, 3, buf, sizeof_buf); break; case DONT_USE_STDIO: return callbacks->write(callbacks, 3, buf, sizeof_buf); break; default: error("sim_io_write_stderr: unaccounted switch\n"); break; } return 0; } void sim_io_printf_filtered(const char *fmt, ...) { char message[1024]; va_list ap; /* format the message */ va_start(ap, fmt); vsprintf(message, fmt, ap); va_end(ap); /* sanity check */ if (strlen(message) >= sizeof(message)) error("sim_io_printf_filtered: buffer overflow\n"); callbacks->printf_filtered(callbacks, "%s", message); } void sim_io_flush_stdoutput(void) { switch (CURRENT_STDIO) { case DO_USE_STDIO: gdb_flush (gdb_stdout); break; case DONT_USE_STDIO: break; default: error("sim_io_read_stdin: unaccounted switch\n"); break; } } void sim_set_callbacks (host_callback *callback) { callbacks = 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"); memset(memory, 0, size); return memory; } void zfree(void *data) { mfree(NULL, data); }