-/* Generic remote debugging interface for simulators.
- Copyright 1993 Free Software Foundation, Inc.
- Contributed by Cygnus Support. Hacked from Steve Chamberlain's Z8000 work
- by Doug Evans. (dje@cygnus.com).
-
-This file is part of GDB.
-
-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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include "defs.h"
-#include "inferior.h"
-#include "wait.h"
-#include "value.h"
-#include <string.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <setjmp.h>
-#include <errno.h>
-#include "terminal.h"
-#include "target.h"
-#include "gdbcore.h"
-#include "simif.h"
-
-/* Naming conventions:
-
- sim_xxx are internal objects that describe top level interfaces to the
- simulator.
-
- simif_xxx are external counterparts to the sim_xxx objects that must be
- provided by the simulator (simif for SIMulator InterFace, duh...).
-
- A complete list of them is:
-
- --- Fetch one register and store the raw value in BUF.
-
-int simif_fetch_register (int regno, char *buf);
-
- --- Store VAL in one register.
-
-int simif_store_register (int regno, char *val);
-
- --- Complete terminate the simulator. This includes freeing all memory,
- closing all open files, and releasing all mmap'd memory.
-
-int simif_kill (void);
-
- --- Load program PROG into the simulator.
-
-int simif_load (bfd *abfd, char *prog);
-
- --- Set the arguments and environment for the program loaded into the
- simulator. ARGV and ENV are NULL terminated lists of pointers.
-
-int simif_set_args (char **argv, char **env);
-
- --- Initialize the simulator. This function is called when the simulator
- is selected from the command line. ARGS is passed from the command line
- and can be used to select whatever run time options the simulator provides.
- ARGS is the raw character string and must be parsed by the simulator.
-
-int simif_open (char *args);
-
- --- Start running the program, or resume it after a breakpoint.
- FIXME: What are A and B?
-
-int simif_resume (int a, int b);
-
- --- Fetch the reason why the program stopped running (breakpoint, signal,
- etc.)
-
-WAITTYPE simif_stop_signal (void);
-
- --- Write some data into the program's memory.
- Result is 0 for success, nonzero for failure.
-
-int simif_write (CORE_ADDR memaddr, char *myaddr, int len);
-
- --- Read some data from the program's memory.
- Result is 0 for success, nonzero for failure.
-
-int simif_read (CORE_ADDR memaddr, char *myaddr, int len);
-*/
-
-/* Forward data declarations */
-extern struct target_ops sim_ops;
-
-int sim_verbose = 0; /* available to the simulator to use */
-
-static int program_loaded = 0;
-
-static void dump_mem ();
-
-static void
-sim_fetch_register (regno)
-int regno;
-{
- if (regno == -1)
- {
- if (sim_verbose)
- printf_filtered ("sim_fetch_register: %d\n", regno);
- /* FIXME: Where did the 16 come from and what does it need to be? */
- for (regno = 0; regno < 16; regno++)
- sim_fetch_register (regno);
- }
- else
- {
- char buf[MAX_REGISTER_RAW_SIZE];
-
- simif_fetch_register (regno, buf);
- supply_register (regno, buf);
- if (sim_verbose)
- {
- printf_filtered ("sim_fetch_register: %d", regno);
- dump_mem (buf, sizeof (REGISTER_TYPE));
- }
- }
-}
-
-static void
-sim_store_register (regno)
-int regno;
-{
- if (regno == -1)
- {
- if (sim_verbose)
- printf_filtered ("sim_store_register: %d\n", regno);
- /* FIXME: 16? */
- for (regno = 0; regno < 16; regno++)
- sim_store_register (regno);
- }
- else
- {
- char value[sizeof (REGISTER_TYPE)];
-
- read_register_gen (regno, value);
- SWAP_TARGET_AND_HOST (value, sizeof (REGISTER_TYPE));
- simif_store_register (regno, value);
- if (sim_verbose)
- {
- printf_filtered ("sim_store_register: %d", regno);
- dump_mem (value, sizeof (REGISTER_TYPE));
- }
- }
-}
-
-static void
-sim_kill (arg,from_tty)
-char *arg;
-int from_tty;
-{
- if (sim_verbose)
- printf_filtered ("sim_kill: arg \"%s\"\n", arg);
-
- simif_kill (); /* close fd's, remove mappings */
- inferior_pid = 0;
-}
-
-/* Load program PROG into the sim. */
-
-static void
-sim_load (prog, fromtty)
- char *prog;
- int fromtty;
-{
- bfd *abfd;
-
- if (sim_verbose)
- printf_filtered ("sim_load: prog \"%s\"\n", prog);
-
- inferior_pid = 0;
- program_loaded = 0;
- abfd = bfd_openr (prog, (char *) 0);
-
- if (!abfd)
- error ("Unable to open file %s.", prog);
-
- if (bfd_check_format (abfd, bfd_object) ==0)
- error ("File is not an object file.");
-
- if (simif_load (abfd, prog) != 0)
- return;
-
- program_loaded = 1;
-
- simif_set_pc (abfd->start_address);
-}
-
-/* This is called not only when we first attach, but also when the
- user types "run" after having attached. */
-
-static void
-sim_create_inferior (exec_file, args, env)
- char *exec_file;
- char *args;
- char **env;
-{
- int len,entry_pt;
- char *arg_buf,**argv;
-
- if (! program_loaded)
- error ("No program loaded.");
-
- if (sim_verbose)
- printf_filtered ("sim_create_inferior: exec_file \"%s\", args \"%s\"\n",
- exec_file, args);
-
- if (exec_file == 0 || exec_bfd == 0)
- error ("No exec file specified.");
-
- entry_pt = (int) bfd_get_start_address (exec_bfd);
-
- sim_kill (NULL, NULL);
- remove_breakpoints ();
- init_wait_for_inferior ();
-
- len = 5 + strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10;
- arg_buf = (char *) alloca (len);
- arg_buf[0] = '\0';
- strcat (arg_buf, exec_file);
- strcat (arg_buf, " ");
- strcat (arg_buf, args);
- argv = buildargv (arg_buf);
- make_cleanup (freeargv, (char *) argv);
- simif_set_args (argv, env);
-
- inferior_pid = 42;
- insert_breakpoints (); /* Needed to get correct instruction in cache */
- proceed (entry_pt, -1, 0);
-}
-
-/* Called when selecting the simulator. EG: (gdb) target sim name. */
-
-static void
-sim_open (args, from_tty)
- char *args;
- int from_tty;
-{
- if (sim_verbose)
- printf_filtered ("sim_open: args \"%s\"\n", args);
-
- if (simif_open (args) != 0)
- {
- error ("Unable to initialize simulator (insufficient memory?).");
- return;
- }
-
- push_target (&sim_ops);
- target_fetch_registers (-1);
-
- printf_filtered ("Connected to the simulator.\n");
-}
-
-/* Close out all files and local state before this target loses control. */
-
-static void
-sim_close (quitting)
- int quitting;
-{
- if (sim_verbose)
- printf_filtered ("sim_close: quitting %d\n", quitting);
-
- program_loaded = 0;
-
- /* FIXME: Need to call simif_close() to close all files and
- delete all mappings. */
-}
-
-/* Terminate the open connection to the remote debugger.
- Use this when you want to detach and do something else
- with your gdb. */
-
-static void
-sim_detach (args,from_tty)
- char *args;
- int from_tty;
-{
- if (sim_verbose)
- printf_filtered ("sim_detach: args \"%s\"\n", args);
-
- pop_target (); /* calls sim_close to do the real work */
- if (from_tty)
- printf_filtered ("Ending simulator %s debugging\n", target_shortname);
-}
-
-/* Tell the remote machine to resume. */
-/* FIXME: What are A and B? */
-
-static void
-sim_resume (a,b)
-{
- if (sim_verbose)
- printf_filtered ("sim_resume: %d/%d\n", a, b);
-
- simif_resume (a, b);
-}
-
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would. */
-
-static int
-sim_wait (status)
- WAITTYPE *status;
-{
- if (sim_verbose)
- printf_filtered ("sim_wait: ");
-#if 1
- *status = simif_stop_signal ();
-#else
- WSETSTOP (*status, simif_stop_signal ());
-#endif
- if (sim_verbose)
- printf_filtered ("status %d\n", *status);
- return 0;
-}
-
-/* Get ready to modify the registers array. On machines which store
- individual registers, this doesn't need to do anything. On machines
- which store all the registers in one fell swoop, this makes sure
- that registers contains all the registers from the program being
- debugged. */
-
-static void
-sim_prepare_to_store ()
-{
- /* Do nothing, since we can store individual regs */
-}
-
-static int
-sim_xfer_inferior_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
-{
- if (sim_verbose)
- {
- printf_filtered ("sim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n",
- myaddr, memaddr, len, write);
- if (sim_verbose && write)
- dump_mem(myaddr, len);
- }
-
- if (! program_loaded)
- error ("No program loaded.");
-
- if (write)
- {
- len = simif_write (memaddr, myaddr, len);
- }
- else
- {
- len = simif_read (memaddr, myaddr, len);
- if (sim_verbose && len > 0)
- dump_mem(myaddr, len);
- }
- return len;
-}
-
-static void
-sim_files_info ()
-{
- char *file = "nothing";
-
- if (exec_bfd)
- file = bfd_get_filename (exec_bfd);
-
- if (sim_verbose)
- printf_filtered ("sim_files_info: file \"%s\"\n", file);
-
- if (exec_bfd)
- printf_filtered ("\tAttached to %s running program %s\n",
- target_shortname, file);
-}
-
-/* Clear the sims notion of what the break points are */
-static void
-sim_mourn ()
-{
- if (sim_verbose)
- printf_filtered ("sim_mourn:\n");
-
- remove_breakpoints ();
- generic_mourn_inferior ();
-}
-
-/* Define the target subroutine names */
-
-struct target_ops sim_ops =
-{
- "sim", "Simulator",
- "Use the Simulator",
- sim_open, sim_close,
- 0, sim_detach, sim_resume, sim_wait, /* attach */
- sim_fetch_register, sim_store_register,
- sim_prepare_to_store,
- sim_xfer_inferior_memory,
- sim_files_info,
- 0, 0, /* Breakpoints */
- 0, 0, 0, 0, 0, /* Terminal handling */
- sim_kill, /* FIXME, kill */
- sim_load,
- 0, /* lookup_symbol */
- sim_create_inferior, /* create_inferior */
- sim_mourn, /* mourn_inferior FIXME */
- 0, /* can_run */
- 0, /* notice_signals */
- process_stratum, 0, /* next */
- 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */
- 0, 0, /* Section pointers */
- OPS_MAGIC, /* Always the last thing */
-};
-
-static void
-sim_snoop ()
-{
- sim_verbose = ! sim_verbose;
- if (sim_verbose)
- printf_filtered ("Snoop enabled\n");
- else
- printf_filtered ("Snoop disabled\n");
-
-}
-
-/***********************************************************************/
-
-void
-_initialize_remote_sim ()
-{
- add_target (&sim_ops);
- add_com ("snoop", class_obscure, sim_snoop,
- "Show what commands are going to the simulator");
-}
-
-static void
-dump_mem (buf, len)
- char *buf;
- int len;
-{
- if (len <= 8)
- {
- if (len == 8 || len == 4)
- {
- long l[2];
- memcpy (l, buf, len);
- printf_filtered ("\t0x%x", l[0]);
- printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]);
- }
- else
- {
- int i;
- printf_filtered ("\t");
- for (i = 0; i < len; i++)
- printf_filtered ("0x%x ", buf[i]);
- printf_filtered ("\n");
- }
- }
-}
projects / deliverable / binutils-gdb.git / blobdiff