-/* Generic remote debugging interface for simulators.
- Copyright 1993 Free Software Foundation, Inc.
- Contributed by Cygnus Support.
- Steve Chamberlain (sac@cygnus.com) and 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 "remote-sim.h"
-
-/* Naming conventions:
-
- simif_xxx are internal objects that describe top level interfaces to the
- simulator (simif for SIMulator InterFace, duh...).
-
- sim_xxx are external counterparts to the simif_xxx objects that must be
- provided by the simulator.
-
- See simif.h for a description. */
-
-/* Forward data declarations */
-extern struct target_ops simif_ops;
-
-int sim_verbose = 0; /* available to the simulator to use */
-
-static int program_loaded = 0;
-
-static void dump_mem ();
-
-static void
-simif_fetch_register (regno)
-int regno;
-{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- simif_fetch_register (regno);
- }
- else
- {
- char buf[MAX_REGISTER_RAW_SIZE];
-
- sim_fetch_register (regno, buf);
- supply_register (regno, buf);
- if (sim_verbose)
- {
- printf_filtered ("simif_fetch_register: %d", regno);
- /* FIXME: We could print something more intelligible. */
- dump_mem (buf, REGISTER_RAW_SIZE (regno));
- }
- }
-}
-
-static void
-simif_store_register (regno)
-int regno;
-{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- simif_store_register (regno);
- }
- else
- {
- /* FIXME: Until read_register() returns LONGEST, we have this. */
- char value[MAX_REGISTER_RAW_SIZE];
-
- read_register_gen (regno, value);
- SWAP_TARGET_AND_HOST (value, REGISTER_RAW_SIZE (regno));
- sim_store_register (regno, value);
- if (sim_verbose)
- {
- printf_filtered ("simif_store_register: %d", regno);
- /* FIXME: We could print something more intelligible. */
- dump_mem (value, REGISTER_RAW_SIZE (regno));
- }
- }
-}
-
-static void
-simif_kill ()
-{
- if (sim_verbose)
- printf_filtered ("simif_kill\n");
-
- sim_kill (); /* close fd's, remove mappings */
- inferior_pid = 0;
-}
-
-/* Load an executable file into the target process. This is expected to
- not only bring new code into the target process, but also to update
- GDB's symbol tables to match. */
-
-static void
-simif_load (prog, fromtty)
- char *prog;
- int fromtty;
-{
- bfd *abfd;
-
- if (sim_verbose)
- printf_filtered ("simif_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 (sim_load (abfd, prog) != 0)
- return;
-
- program_loaded = 1;
-
- sim_set_pc (abfd->start_address);
-}
-
-/*
- * This is a utility routine that sim_load() can call to do the work.
- * The result is 0 for success, non-zero for failure.
- *
- * Eg: int sim_load (bfd *bfd, char *prog) { return sim_load_standard (bfd); }
- */
-
-sim_load_standard (abfd)
- bfd *abfd;
-{
- asection *s;
-
- s = abfd->sections;
- while (s != (asection *)NULL)
- {
- if (s->flags & SEC_LOAD)
- {
- int i;
- int delta = 4096;
- char *buffer = xmalloc (delta);
- printf_filtered ("%s\t: 0x%4x .. 0x%4x ",
- s->name, s->vma, s->vma + s->_raw_size);
- for (i = 0; i < s->_raw_size; i+= delta)
- {
- int sub_delta = delta;
- if (sub_delta > s->_raw_size - i)
- sub_delta = s->_raw_size - i ;
-
- bfd_get_section_contents (abfd, s, buffer, i, sub_delta);
- sim_write (s->vma + i, buffer, sub_delta);
- printf_filtered ("*");
- fflush (stdout);
- }
- printf_filtered ("\n");
- free (buffer);
- }
- s = s->next;
- }
-
- return 0;
-}
-
-/* Start an inferior process and set inferior_pid to its pid.
- EXEC_FILE is the file to run.
- ALLARGS is a string containing the arguments to the program.
- ENV is the environment vector to pass. Errors reported with error().
- On VxWorks and various standalone systems, we ignore exec_file. */
-/* This is called not only when we first attach, but also when the
- user types "run" after having attached. */
-
-static void
-simif_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 ("simif_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);
-
- simif_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);
- if (sim_set_args (argv, env) != 0)
- return;
-
- inferior_pid = 42;
- insert_breakpoints (); /* Needed to get correct instruction in cache */
- proceed (entry_pt, -1, 0);
-}
-
-/* The open routine takes the rest of the parameters from the command,
- and (if successful) pushes a new target onto the stack.
- Targets should supply this routine, if only to provide an error message. */
-/* Called when selecting the simulator. EG: (gdb) target sim name. */
-
-static void
-simif_open (args, from_tty)
- char *args;
- int from_tty;
-{
- if (sim_verbose)
- printf_filtered ("simif_open: args \"%s\"\n", args);
-
- if (sim_open (args) != 0)
- {
- error ("Unable to initialize simulator (insufficient memory?).");
- return;
- }
-
- push_target (&simif_ops);
- target_fetch_registers (-1);
-
- /* FIXME: check from_tty here? */
- printf_filtered ("Connected to the simulator.\n");
-}
-
-/* Does whatever cleanup is required for a target that we are no longer
- going to be calling. Argument says whether we are quitting gdb and
- should not get hung in case of errors, or whether we want a clean
- termination even if it takes a while. This routine is automatically
- always called just before a routine is popped off the target stack.
- Closing file descriptors and freeing memory are typical things it should
- do. */
-/* Close out all files and local state before this target loses control. */
-
-static void
-simif_close (quitting)
- int quitting;
-{
- if (sim_verbose)
- printf_filtered ("simif_close: quitting %d\n", quitting);
-
- program_loaded = 0;
-
- /* FIXME: Need to call sim_close() to close all files and
- delete all mappings. */
-}
-
-/* Takes a program previously attached to and detaches it.
- The program may resume execution (some targets do, some don't) and will
- no longer stop on signals, etc. We better not have left any breakpoints
- in the program or it'll die when it hits one. ARGS is arguments
- typed by the user (e.g. a signal to send the process). FROM_TTY
- says whether to be verbose or not. */
-/* Terminate the open connection to the remote debugger.
- Use this when you want to detach and do something else with your gdb. */
-
-static void
-simif_detach (args,from_tty)
- char *args;
- int from_tty;
-{
- if (sim_verbose)
- printf_filtered ("simif_detach: args \"%s\"\n", args);
-
- pop_target (); /* calls simif_close to do the real work */
- if (from_tty)
- printf_filtered ("Ending simulator %s debugging\n", target_shortname);
-}
-
-/* Resume execution of the target process. STEP says whether to single-step
- or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given
- to the target, or zero for no signal. */
-
-static void
-simif_resume (pid, step, siggnal)
- int pid, step, siggnal;
-{
- if (sim_verbose)
- printf_filtered ("simif_resume: step %d, signal %d\n", step, siggnal);
-
- sim_resume (step, siggnal);
-}
-
-/* Wait for inferior process to do something. Return pid of child,
- or -1 in case of error; store status through argument pointer STATUS,
- just as `wait' would. */
-
-static int
-simif_wait (status)
- WAITTYPE *status;
-{
- if (sim_verbose)
- printf_filtered ("simif_wait: ");
-#if 1
- *status = sim_stop_signal ();
-#else
- WSETSTOP (*status, sim_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
-simif_prepare_to_store ()
-{
- /* Do nothing, since we can store individual regs */
-}
-
-static int
-simif_xfer_inferior_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
-{
- if (! program_loaded)
- error ("No program loaded.");
-
- if (sim_verbose)
- {
- printf_filtered ("simif_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 (write)
- {
- len = sim_write (memaddr, myaddr, len);
- }
- else
- {
- len = sim_read (memaddr, myaddr, len);
- if (sim_verbose && len > 0)
- dump_mem(myaddr, len);
- }
- return len;
-}
-
-static void
-simif_files_info (target)
- struct target_ops *target;
-{
- char *file = "nothing";
-
- if (exec_bfd)
- file = bfd_get_filename (exec_bfd);
-
- if (sim_verbose)
- printf_filtered ("simif_files_info: file \"%s\"\n", file);
-
- if (exec_bfd)
- {
- printf_filtered ("\tAttached to %s running program %s\n",
- target_shortname, file);
- sim_info ();
- }
-}
-
-/* Clear the sims notion of what the break points are. */
-
-static void
-simif_mourn_inferior ()
-{
- if (sim_verbose)
- printf_filtered ("simif_mourn_inferior:\n");
-
- remove_breakpoints ();
- generic_mourn_inferior ();
-}
-
-/* Define the target subroutine names */
-
-struct target_ops simif_ops =
-{
- "sim", "simulator",
- "Use the simulator",
- simif_open, simif_close,
- 0, simif_detach, simif_resume, simif_wait, /* attach */
- simif_fetch_register, simif_store_register,
- simif_prepare_to_store,
- simif_xfer_inferior_memory,
- simif_files_info,
- 0, 0, /* Breakpoints */
- 0, 0, 0, 0, 0, /* Terminal handling */
- simif_kill, /* FIXME, kill */
- simif_load,
- 0, /* lookup_symbol */
- simif_create_inferior, /* create_inferior */
- simif_mourn_inferior, /* 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
-simif_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 (&simif_ops);
- add_com ("snoop", class_obscure, simif_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