-/* Remote debugging interface for generalized simulator
- Copyright 1992 Free Software Foundation, Inc.
- Contributed by Cygnus Support. Written by Steve Chamberlain
- (sac@cygnus.com).
+/* Generic remote debugging interface for simulators.
-This file is part of GDB.
+ Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+ 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
-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.
+ Contributed by Cygnus Support.
+ Steve Chamberlain (sac@cygnus.com).
-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.
+ This file is part of GDB.
-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. */
+ 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
-#include "wait.h"
#include "value.h"
-#include <string.h>
+#include "gdb_string.h"
#include <ctype.h>
#include <fcntl.h>
#include <signal.h>
#include "terminal.h"
#include "target.h"
#include "gdbcore.h"
+#include "gdb/callback.h"
+#include "gdb/remote-sim.h"
+#include "command.h"
+#include "regcache.h"
+#include "gdb_assert.h"
+#include "sim-regno.h"
+#include "arch-utils.h"
+#include "readline/readline.h"
+
+/* Prototypes */
+
+extern void _initialize_remote_sim (void);
+
+static void dump_mem (char *buf, int len);
+
+static void init_callbacks (void);
+
+static void end_callbacks (void);
+
+static int gdb_os_write_stdout (host_callback *, const char *, int);
+
+static void gdb_os_flush_stdout (host_callback *);
+
+static int gdb_os_write_stderr (host_callback *, const char *, int);
+
+static void gdb_os_flush_stderr (host_callback *);
+
+static int gdb_os_poll_quit (host_callback *);
+
+/* printf_filtered is depreciated */
+static void gdb_os_printf_filtered (host_callback *, const char *, ...);
+
+static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list);
+
+static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list);
+
+static void gdb_os_error (host_callback *, const char *, ...);
+
+static void gdbsim_fetch_register (struct regcache *regcache, int regno);
+
+static void gdbsim_store_register (struct regcache *regcache, int regno);
+
+static void gdbsim_kill (void);
+
+static void gdbsim_load (char *prog, int fromtty);
+
+static void gdbsim_open (char *args, int from_tty);
+
+static void gdbsim_close (int quitting);
+
+static void gdbsim_detach (char *args, int from_tty);
+
+static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal);
+
+static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status);
+
+static void gdbsim_prepare_to_store (struct regcache *regcache);
+
+static void gdbsim_files_info (struct target_ops *target);
+
+static void gdbsim_mourn_inferior (void);
+
+static void gdbsim_stop (void);
+
+void simulator_command (char *args, int from_tty);
+
+/* Naming convention:
+
+ sim_* are the interface to the simulator (see remote-sim.h).
+ gdbsim_* are stuff which is internal to gdb. */
/* Forward data declarations */
-extern struct target_ops sim_ops; /* Forward declaration */
+extern struct target_ops gdbsim_ops;
-int
-sim_write_inferior_memory (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- unsigned char *myaddr;
- int len;
+static int program_loaded = 0;
+
+/* We must keep track of whether the simulator has been opened or not because
+ GDB can call a target's close routine twice, but sim_close doesn't allow
+ this. We also need to record the result of sim_open so we can pass it
+ back to the other sim_foo routines. */
+static SIM_DESC gdbsim_desc = 0;
+
+static void
+dump_mem (char *buf, int len)
{
- return sim_write(memaddr, myaddr, len);
+ if (len <= 8)
+ {
+ if (len == 8 || len == 4)
+ {
+ long l[2];
+ memcpy (l, buf, len);
+ printf_filtered ("\t0x%lx", l[0]);
+ if (len == 8)
+ printf_filtered (" 0x%lx", l[1]);
+ printf_filtered ("\n");
+ }
+ else
+ {
+ int i;
+ printf_filtered ("\t");
+ for (i = 0; i < len; i++)
+ printf_filtered ("0x%x ", buf[i]);
+ printf_filtered ("\n");
+ }
+ }
}
+static host_callback gdb_callback;
+static int callbacks_initialized = 0;
+
+/* Initialize gdb_callback. */
+
static void
-store_register(regno)
-int regno;
+init_callbacks (void)
{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- store_register(regno);
- }
- else
- {
- sim_store_register(regno, read_register(regno));
- }
+ if (!callbacks_initialized)
+ {
+ gdb_callback = default_callback;
+ gdb_callback.init (&gdb_callback);
+ gdb_callback.write_stdout = gdb_os_write_stdout;
+ gdb_callback.flush_stdout = gdb_os_flush_stdout;
+ gdb_callback.write_stderr = gdb_os_write_stderr;
+ gdb_callback.flush_stderr = gdb_os_flush_stderr;
+ gdb_callback.printf_filtered = gdb_os_printf_filtered;
+ gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered;
+ gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered;
+ gdb_callback.error = gdb_os_error;
+ gdb_callback.poll_quit = gdb_os_poll_quit;
+ gdb_callback.magic = HOST_CALLBACK_MAGIC;
+ callbacks_initialized = 1;
+ }
}
+/* Release callbacks (free resources used by them). */
-/*
- * Download a file specified in 'args', to the sim.
- */
static void
-sim_load(args,fromtty)
-char *args;
-int fromtty;
+end_callbacks (void)
{
- bfd *abfd;
- asection *s;
+ if (callbacks_initialized)
+ {
+ gdb_callback.shutdown (&gdb_callback);
+ callbacks_initialized = 0;
+ }
+}
- inferior_pid = 0;
- abfd = bfd_openr(args, (char*)0);
+/* GDB version of os_write_stdout callback. */
- if (!abfd)
- {
- printf_filtered("Unable to open file %s\n", args);
- return;
- }
+static int
+gdb_os_write_stdout (host_callback *p, const char *buf, int len)
+{
+ int i;
+ char b[2];
- if (bfd_check_format(abfd, bfd_object) ==0)
- {
- printf_filtered("File is not an object file\n");
- return ;
- }
+ ui_file_write (gdb_stdtarg, buf, len);
+ return len;
+}
- s = abfd->sections;
- while (s != (asection *)NULL)
- {
- if (s->flags & SEC_LOAD)
+/* GDB version of os_flush_stdout callback. */
+
+static void
+gdb_os_flush_stdout (host_callback *p)
+{
+ gdb_flush (gdb_stdtarg);
+}
+
+/* GDB version of os_write_stderr callback. */
+
+static int
+gdb_os_write_stderr (host_callback *p, const char *buf, int len)
+{
+ int i;
+ char b[2];
+
+ for (i = 0; i < len; i++)
{
- 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)
+ b[0] = buf[i];
+ b[1] = 0;
+ fputs_unfiltered (b, gdb_stdtargerr);
+ }
+ return len;
+}
+
+/* GDB version of os_flush_stderr callback. */
+
+static void
+gdb_os_flush_stderr (host_callback *p)
+{
+ gdb_flush (gdb_stdtargerr);
+}
+
+/* GDB version of printf_filtered callback. */
+
+static void
+gdb_os_printf_filtered (host_callback * p, const char *format,...)
+{
+ va_list args;
+ va_start (args, format);
+
+ vfprintf_filtered (gdb_stdout, format, args);
+
+ va_end (args);
+}
+
+/* GDB version of error vprintf_filtered. */
+
+static void
+gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap)
+{
+ vfprintf_filtered (gdb_stdout, format, ap);
+}
+
+/* GDB version of error evprintf_filtered. */
+
+static void
+gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap)
+{
+ vfprintf_filtered (gdb_stderr, format, ap);
+}
+
+/* GDB version of error callback. */
+
+static void
+gdb_os_error (host_callback * p, const char *format,...)
+{
+ if (deprecated_error_hook)
+ (*deprecated_error_hook) ();
+ else
+ {
+ va_list args;
+ va_start (args, format);
+ verror (format, args);
+ va_end (args);
+ }
+}
+
+int
+one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum)
+{
+ /* Only makes sense to supply raw registers. */
+ gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch));
+ return regnum;
+}
+
+static void
+gdbsim_fetch_register (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regno == -1)
+ {
+ for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
+ gdbsim_fetch_register (regcache, regno);
+ return;
+ }
+
+ switch (gdbarch_register_sim_regno (gdbarch, regno))
+ {
+ case LEGACY_SIM_REGNO_IGNORE:
+ break;
+ case SIM_REGNO_DOES_NOT_EXIST:
{
- 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_inferior_memory(s->vma + i, buffer, sub_delta);
- printf_filtered("*");
- fflush(stdout);
+ /* For moment treat a `does not exist' register the same way
+ as an ``unavailable'' register. */
+ char buf[MAX_REGISTER_SIZE];
+ int nr_bytes;
+ memset (buf, 0, MAX_REGISTER_SIZE);
+ regcache_raw_supply (regcache, regno, buf);
+ break;
+ }
+
+ default:
+ {
+ static int warn_user = 1;
+ char buf[MAX_REGISTER_SIZE];
+ int nr_bytes;
+ gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch));
+ memset (buf, 0, MAX_REGISTER_SIZE);
+ nr_bytes = sim_fetch_register (gdbsim_desc,
+ gdbarch_register_sim_regno
+ (gdbarch, regno),
+ buf,
+ register_size (gdbarch, regno));
+ if (nr_bytes > 0
+ && nr_bytes != register_size (gdbarch, regno) && warn_user)
+ {
+ fprintf_unfiltered (gdb_stderr,
+ "Size of register %s (%d/%d) incorrect (%d instead of %d))",
+ gdbarch_register_name (gdbarch, regno),
+ regno,
+ gdbarch_register_sim_regno
+ (gdbarch, regno),
+ nr_bytes, register_size (gdbarch, regno));
+ warn_user = 0;
+ }
+ /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
+ indicating that GDB and the SIM have different ideas about
+ which registers are fetchable. */
+ /* Else if (nr_bytes < 0): an old simulator, that doesn't
+ think to return the register size. Just assume all is ok. */
+ regcache_raw_supply (regcache, regno, buf);
+ if (remote_debug)
+ {
+ printf_filtered ("gdbsim_fetch_register: %d", regno);
+ /* FIXME: We could print something more intelligible. */
+ dump_mem (buf, register_size (gdbarch, regno));
+ }
+ break;
}
- printf_filtered( "\n");
- free(buffer);
}
- s = s->next;
- }
+}
- sim_store_register(PC_REGNUM, abfd->start_address);
+
+static void
+gdbsim_store_register (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regno == -1)
+ {
+ for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
+ gdbsim_store_register (regcache, regno);
+ return;
+ }
+ else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0)
+ {
+ char tmp[MAX_REGISTER_SIZE];
+ int nr_bytes;
+ regcache_cooked_read (regcache, regno, tmp);
+ nr_bytes = sim_store_register (gdbsim_desc,
+ gdbarch_register_sim_regno
+ (gdbarch, regno),
+ tmp, register_size (gdbarch, regno));
+ if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno))
+ internal_error (__FILE__, __LINE__,
+ _("Register size different to expected"));
+ /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
+ indicating that GDB and the SIM have different ideas about
+ which registers are fetchable. */
+ if (remote_debug)
+ {
+ printf_filtered ("gdbsim_store_register: %d", regno);
+ /* FIXME: We could print something more intelligible. */
+ dump_mem (tmp, register_size (gdbarch, regno));
+ }
+ }
}
+/* Kill the running program. This may involve closing any open files
+ and releasing other resources acquired by the simulated program. */
+
+static void
+gdbsim_kill (void)
+{
+ if (remote_debug)
+ printf_filtered ("gdbsim_kill\n");
+
+ /* There is no need to `kill' running simulator - the simulator is
+ not running. Mourning it is enough. */
+ target_mourn_inferior ();
+}
+
+/* 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
+gdbsim_load (char *args, int fromtty)
+{
+ char **argv = buildargv (args);
+ char *prog;
+
+ if (argv == NULL)
+ nomem (0);
+
+ make_cleanup_freeargv (argv);
+
+ prog = tilde_expand (argv[0]);
+
+ if (argv[1] != NULL)
+ error (_("GDB sim does not yet support a load offset."));
+
+ if (remote_debug)
+ printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
+
+ /* FIXME: We will print two messages on error.
+ Need error to either not print anything if passed NULL or need
+ another routine that doesn't take any arguments. */
+ if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL)
+ error (_("unable to load program"));
+
+ /* FIXME: If a load command should reset the targets registers then
+ a call to sim_create_inferior() should go here. */
+
+ program_loaded = 1;
+}
+
+
+/* Start an inferior process and set inferior_ptid to its pid.
+ EXEC_FILE is the file to run.
+ ARGS 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. */
-void
-sim_create_inferior (execfile, args, env)
- char *execfile;
- char *args;
- char **env;
+
+static void
+gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty)
{
- int entry_pt;
+ int len;
+ char *arg_buf, **argv;
- if (args && *args)
- error ("Can't pass arguments to remote sim process.");
+ if (exec_file == 0 || exec_bfd == 0)
+ warning (_("No executable file specified."));
+ if (!program_loaded)
+ warning (_("No program loaded."));
- if (execfile == 0 || exec_bfd == 0)
- error ("No exec file specified");
+ if (remote_debug)
+ printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
+ (exec_file ? exec_file : "(NULL)"),
+ args);
- entry_pt = (int) bfd_get_start_address (exec_bfd);
+ gdbsim_kill ();
+ remove_breakpoints ();
init_wait_for_inferior ();
- insert_breakpoints ();
- proceed(entry_pt, -1, 0);
-}
+ if (exec_file != NULL)
+ {
+ len = 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 (argv);
+ }
+ else
+ argv = NULL;
+ sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
+ inferior_ptid = pid_to_ptid (42);
+ target_mark_running (&gdbsim_ops);
+ insert_breakpoints (); /* Needed to get correct instruction in cache */
+
+ clear_proceed_status ();
+}
+
+/* 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
-sim_open (name, from_tty)
- char *name;
- int from_tty;
+gdbsim_open (char *args, int from_tty)
{
- if(name == 0)
- {
- name = "";
- }
- push_target (&sim_ops);
- target_fetch_registers(-1);
- printf_filtered("Connected to the simulator.\n");
+ int len;
+ char *arg_buf;
+ char **argv;
+
+ if (remote_debug)
+ printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)");
+
+ /* Remove current simulator if one exists. Only do this if the simulator
+ has been opened because sim_close requires it.
+ This is important because the call to push_target below will cause
+ sim_close to be called if the simulator is already open, but push_target
+ is called after sim_open! We can't move the call to push_target before
+ the call to sim_open because sim_open may invoke `error'. */
+ if (gdbsim_desc != NULL)
+ unpush_target (&gdbsim_ops);
+
+ len = (7 + 1 /* gdbsim */
+ + strlen (" -E little")
+ + strlen (" --architecture=xxxxxxxxxx")
+ + (args ? strlen (args) : 0)
+ + 50) /* slack */ ;
+ arg_buf = (char *) alloca (len);
+ strcpy (arg_buf, "gdbsim"); /* 7 */
+ /* Specify the byte order for the target when it is explicitly
+ specified by the user (not auto detected). */
+ switch (selected_byte_order ())
+ {
+ case BFD_ENDIAN_BIG:
+ strcat (arg_buf, " -E big");
+ break;
+ case BFD_ENDIAN_LITTLE:
+ strcat (arg_buf, " -E little");
+ break;
+ case BFD_ENDIAN_UNKNOWN:
+ break;
+ }
+ /* Specify the architecture of the target when it has been
+ explicitly specified */
+ if (selected_architecture_name () != NULL)
+ {
+ strcat (arg_buf, " --architecture=");
+ strcat (arg_buf, selected_architecture_name ());
+ }
+ /* finally, any explicit args */
+ if (args)
+ {
+ strcat (arg_buf, " "); /* 1 */
+ strcat (arg_buf, args);
+ }
+ argv = buildargv (arg_buf);
+ if (argv == NULL)
+ error (_("Insufficient memory available to allocate simulator arg list."));
+ make_cleanup_freeargv (argv);
+
+ init_callbacks ();
+ gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv);
+
+ if (gdbsim_desc == 0)
+ error (_("unable to create simulator instance"));
+
+ push_target (&gdbsim_ops);
+ printf_filtered ("Connected to the simulator.\n");
+
+ /* There's nothing running after "target sim" or "load"; not until
+ "run". */
+ inferior_ptid = null_ptid;
+ target_mark_exited (&gdbsim_ops);
}
+/* 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
-sim_close (quitting)
- int quitting;
+gdbsim_close (int quitting)
{
+ if (remote_debug)
+ printf_filtered ("gdbsim_close: quitting %d\n", quitting);
+
+ program_loaded = 0;
+
+ if (gdbsim_desc != NULL)
+ {
+ sim_close (gdbsim_desc, quitting);
+ gdbsim_desc = NULL;
+ }
+
+ end_callbacks ();
+ generic_mourn_inferior ();
}
+/* 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. */
-void
-sim_detach (args,from_tty)
- char *args;
- int from_tty;
+ Use this when you want to detach and do something else with your gdb. */
+
+static void
+gdbsim_detach (char *args, int from_tty)
{
- pop_target(); /* calls sim_close to do the real work */
+ if (remote_debug)
+ printf_filtered ("gdbsim_detach: args \"%s\"\n", args);
+
+ pop_target (); /* calls gdbsim_close to do the real work */
if (from_tty)
- printf_filtered ("Ending remote %s debugging\n", target_shortname);
+ 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 enum target_signal resume_siggnal;
+static int resume_step;
+
+static void
+gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal)
+{
+ if (PIDGET (inferior_ptid) != 42)
+ error (_("The program is not being run."));
+ if (remote_debug)
+ printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
+
+ resume_siggnal = siggnal;
+ resume_step = step;
}
-
-/* Tell the remote machine to resume. */
+/* Notify the simulator of an asynchronous request to stop.
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would. */
+ The simulator shall ensure that the stop request is eventually
+ delivered to the simulator. If the call is made while the
+ simulator is not running then the stop request is processed when
+ the simulator is next resumed.
-int
-sim_wait (status)
- WAITTYPE *status;
+ For simulators that do not support this operation, just abort */
+
+static void
+gdbsim_stop (void)
{
- WSETSTOP(*status, sim_stop_signal());
- return 0;
+ if (!sim_stop (gdbsim_desc))
+ {
+ quit ();
+ }
}
+/* GDB version of os_poll_quit callback.
+ Taken from gdb/util.c - should be in a library. */
+
+static int
+gdb_os_poll_quit (host_callback *p)
+{
+ if (deprecated_ui_loop_hook != NULL)
+ deprecated_ui_loop_hook (0);
+
+ if (quit_flag) /* gdb's idea of quit */
+ {
+ quit_flag = 0; /* we've stolen it */
+ return 1;
+ }
+ else if (immediate_quit)
+ {
+ return 1;
+ }
+ return 0;
+}
+/* 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 void
-fetch_register(regno)
-int regno;
+gdbsim_cntrl_c (int signo)
{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- fetch_register(regno);
- }
- else
+ gdbsim_stop ();
+}
+
+static ptid_t
+gdbsim_wait (ptid_t ptid, struct target_waitstatus *status)
+{
+ static RETSIGTYPE (*prev_sigint) ();
+ int sigrc = 0;
+ enum sim_stop reason = sim_running;
+
+ if (remote_debug)
+ printf_filtered ("gdbsim_wait\n");
+
+#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
{
- char buf[MAX_REGISTER_RAW_SIZE];
- sim_fetch_register(regno, buf);
- supply_register(regno, buf);
+ struct sigaction sa, osa;
+ sa.sa_handler = gdbsim_cntrl_c;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = 0;
+ sigaction (SIGINT, &sa, &osa);
+ prev_sigint = osa.sa_handler;
}
+#else
+ prev_sigint = signal (SIGINT, gdbsim_cntrl_c);
+#endif
+ sim_resume (gdbsim_desc, resume_step, resume_siggnal);
+ signal (SIGINT, prev_sigint);
+ resume_step = 0;
+
+ sim_stop_reason (gdbsim_desc, &reason, &sigrc);
+
+ switch (reason)
+ {
+ case sim_exited:
+ status->kind = TARGET_WAITKIND_EXITED;
+ status->value.integer = sigrc;
+ break;
+ case sim_stopped:
+ switch (sigrc)
+ {
+ case TARGET_SIGNAL_ABRT:
+ quit ();
+ break;
+ case TARGET_SIGNAL_INT:
+ case TARGET_SIGNAL_TRAP:
+ default:
+ status->kind = TARGET_WAITKIND_STOPPED;
+ status->value.sig = sigrc;
+ break;
+ }
+ break;
+ case sim_signalled:
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ status->value.sig = sigrc;
+ break;
+ case sim_running:
+ case sim_polling:
+ /* FIXME: Is this correct? */
+ break;
+ }
+
+ return inferior_ptid;
}
+/* 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. */
-int
-sim_xfer_inferior_memory(memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
+static void
+gdbsim_prepare_to_store (struct regcache *regcache)
{
+ /* Do nothing, since we can store individual regs */
+}
+
+/* Transfer LEN bytes between GDB address MYADDR and target address
+ MEMADDR. If WRITE is non-zero, transfer them to the target,
+ otherwise transfer them from the target. TARGET is unused.
+
+ Returns the number of bytes transferred. */
+
+static int
+gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
+ int write, struct mem_attrib *attrib,
+ struct target_ops *target)
+{
+ /* If no program is running yet, then ignore the simulator for
+ memory. Pass the request down to the next target, hopefully
+ an exec file. */
+ if (!target_has_execution)
+ return 0;
+
+ if (!program_loaded)
+ error (_("No program loaded."));
+
+ if (remote_debug)
+ {
+ /* FIXME: Send to something other than STDOUT? */
+ printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x");
+ gdb_print_host_address (myaddr, gdb_stdout);
+ printf_filtered (", memaddr 0x%s, len %d, write %d\n",
+ paddr_nz (memaddr), len, write);
+ if (remote_debug && write)
+ dump_mem (myaddr, len);
+ }
+
if (write)
- {
- sim_write(memaddr, myaddr, len);
- }
- else
- {
- sim_read(memaddr, myaddr, len);
- }
+ {
+ len = sim_write (gdbsim_desc, memaddr, myaddr, len);
+ }
+ else
+ {
+ len = sim_read (gdbsim_desc, memaddr, myaddr, len);
+ if (remote_debug && len > 0)
+ dump_mem (myaddr, len);
+ }
return len;
}
+static void
+gdbsim_files_info (struct target_ops *target)
+{
+ char *file = "nothing";
-/* This routine is run as a hook, just before the main command loop is
- entered. If gdb is configured for the H8, but has not had its
- target specified yet, this will loop prompting the user to do so.
-*/
+ if (exec_bfd)
+ file = bfd_get_filename (exec_bfd);
-void
-sim_before_main_loop ()
-{
- push_target (&sim_ops);
+ if (remote_debug)
+ printf_filtered ("gdbsim_files_info: file \"%s\"\n", file);
+
+ if (exec_bfd)
+ {
+ printf_filtered ("\tAttached to %s running program %s\n",
+ target_shortname, file);
+ sim_info (gdbsim_desc, 0);
+ }
}
+/* Clear the simulator's notion of what the break points are. */
-static void rem_resume(a,b)
+static void
+gdbsim_mourn_inferior (void)
{
- sim_resume(a,b);
+ if (remote_debug)
+ printf_filtered ("gdbsim_mourn_inferior:\n");
+
+ remove_breakpoints ();
+ target_mark_exited (&gdbsim_ops);
+ generic_mourn_inferior ();
}
+/* Pass the command argument through to the simulator verbatim. The
+ simulator must do any command interpretation work. */
+
void
-pstore()
+simulator_command (char *args, int from_tty)
{
+ if (gdbsim_desc == NULL)
+ {
+
+ /* PREVIOUSLY: The user may give a command before the simulator
+ is opened. [...] (??? assuming of course one wishes to
+ continue to allow commands to be sent to unopened simulators,
+ which isn't entirely unreasonable). */
+
+ /* The simulator is a builtin abstraction of a remote target.
+ Consistent with that model, access to the simulator, via sim
+ commands, is restricted to the period when the channel to the
+ simulator is open. */
+
+ error (_("Not connected to the simulator target"));
+ }
+
+ sim_do_command (gdbsim_desc, args);
+
+ /* Invalidate the register cache, in case the simulator command does
+ something funny. */
+ registers_changed ();
}
+
/* Define the target subroutine names */
-struct target_ops sim_ops =
-{
- "sim", "simulator",
- "Use the simulator",
- sim_open, sim_close,
- 0, sim_detach, rem_resume, sim_wait, /* attach */
- fetch_register, store_register,
- pstore,
- sim_xfer_inferior_memory,
- 0,
- 0, 0, /* Breakpoints */
- 0, 0, 0, 0, 0, /* Terminal handling */
- pstore,
- sim_load,
- 0, /* lookup_symbol */
- sim_create_inferior, /* create_inferior */
- pstore, /* 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 */
-};
-
-/***********************************************************************/
+struct target_ops gdbsim_ops;
-void
-_initialize_remote_sim ()
+static void
+init_gdbsim_ops (void)
{
- add_target (&sim_ops);
+ gdbsim_ops.to_shortname = "sim";
+ gdbsim_ops.to_longname = "simulator";
+ gdbsim_ops.to_doc = "Use the compiled-in simulator.";
+ gdbsim_ops.to_open = gdbsim_open;
+ gdbsim_ops.to_close = gdbsim_close;
+ gdbsim_ops.to_detach = gdbsim_detach;
+ gdbsim_ops.to_resume = gdbsim_resume;
+ gdbsim_ops.to_wait = gdbsim_wait;
+ gdbsim_ops.to_fetch_registers = gdbsim_fetch_register;
+ gdbsim_ops.to_store_registers = gdbsim_store_register;
+ gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store;
+ gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory;
+ gdbsim_ops.to_files_info = gdbsim_files_info;
+ gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint;
+ gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint;
+ gdbsim_ops.to_kill = gdbsim_kill;
+ gdbsim_ops.to_load = gdbsim_load;
+ gdbsim_ops.to_create_inferior = gdbsim_create_inferior;
+ gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior;
+ gdbsim_ops.to_stop = gdbsim_stop;
+ gdbsim_ops.to_stratum = process_stratum;
+ gdbsim_ops.to_has_all_memory = 1;
+ gdbsim_ops.to_has_memory = 1;
+ gdbsim_ops.to_has_stack = 1;
+ gdbsim_ops.to_has_registers = 1;
+ gdbsim_ops.to_has_execution = 1;
+ gdbsim_ops.to_magic = OPS_MAGIC;
+
+#ifdef TARGET_REDEFINE_DEFAULT_OPS
+ TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops);
+#endif
}
+void
+_initialize_remote_sim (void)
+{
+ init_gdbsim_ops ();
+ add_target (&gdbsim_ops);
+ add_com ("sim", class_obscure, simulator_command,
+ _("Send a command to the simulator."));
+}