/* Generic remote debugging interface for simulators.
- Copyright 1993 Free Software Foundation, Inc.
+
+ Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+ 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+
Contributed by Cygnus Support.
- Steve Chamberlain (sac@cygnus.com) and Doug Evans (dje@cygnus.com).
+ Steve Chamberlain (sac@cygnus.com).
-This file is part of GDB.
+ 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 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.
+ 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. */
+ 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 "remote-sim.h"
-#include "remote-utils.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 */
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 (buf, len)
- char *buf;
- int len;
+dump_mem (char *buf, int len)
{
if (len <= 8)
{
{
long l[2];
memcpy (l, buf, len);
- printf_filtered ("\t0x%x", l[0]);
- printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]);
+ printf_filtered ("\t0x%lx", l[0]);
+ if (len == 8)
+ printf_filtered (" 0x%lx", l[1]);
+ printf_filtered ("\n");
}
else
{
}
}
+static host_callback gdb_callback;
+static int callbacks_initialized = 0;
+
+/* Initialize gdb_callback. */
+
+static void
+init_callbacks (void)
+{
+ 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). */
+
+static void
+end_callbacks (void)
+{
+ if (callbacks_initialized)
+ {
+ gdb_callback.shutdown (&gdb_callback);
+ callbacks_initialized = 0;
+ }
+}
+
+/* GDB version of os_write_stdout callback. */
+
+static int
+gdb_os_write_stdout (host_callback *p, const char *buf, int len)
+{
+ int i;
+ char b[2];
+
+ ui_file_write (gdb_stdtarg, buf, len);
+ return len;
+}
+
+/* GDB version of os_flush_stdout callback. */
+
static void
-gdbsim_fetch_register (regno)
-int regno;
+gdb_os_flush_stdout (host_callback *p)
{
- if (regno == -1)
+ 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++)
{
- for (regno = 0; regno < NUM_REGS; regno++)
- gdbsim_fetch_register (regno);
+ 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
{
- char buf[MAX_REGISTER_RAW_SIZE];
+ va_list args;
+ va_start (args, format);
+ verror (format, args);
+ va_end (args);
+ }
+}
- sim_fetch_register (regno, buf);
- supply_register (regno, buf);
- if (sr_get_debug ())
- {
- printf_filtered ("gdbsim_fetch_register: %d", regno);
- /* FIXME: We could print something more intelligible. */
- dump_mem (buf, REGISTER_RAW_SIZE (regno));
- }
+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:
+ {
+ /* 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;
+ }
}
}
+
static void
-gdbsim_store_register (regno)
-int regno;
+gdbsim_store_register (struct regcache *regcache, int regno)
{
- if (regno == -1)
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regno == -1)
{
- for (regno = 0; regno < NUM_REGS; regno++)
- gdbsim_store_register (regno);
+ for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++)
+ gdbsim_store_register (regcache, regno);
+ return;
}
- else
+ else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0)
{
- /* FIXME: Until read_register() returns LONGEST, we have this. */
- char value[MAX_REGISTER_RAW_SIZE];
- read_register_gen (regno, value);
- sim_store_register (regno, value);
- if (sr_get_debug ())
+ 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 (value, REGISTER_RAW_SIZE (regno));
+ 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 ()
+gdbsim_kill (void)
{
- if (sr_get_debug ())
+ if (remote_debug)
printf_filtered ("gdbsim_kill\n");
- sim_kill (); /* close fd's, remove mappings */
- inferior_pid = 0;
+ /* 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
GDB's symbol tables to match. */
static void
-gdbsim_load (prog, fromtty)
- char *prog;
- int fromtty;
+gdbsim_load (char *args, int fromtty)
{
- bfd *abfd;
-
- if (sr_get_debug ())
- printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
-
- inferior_pid = 0;
- program_loaded = 0;
- abfd = bfd_openr (prog, gnutarget);
+ char **argv = buildargv (args);
+ char *prog;
- if (!abfd)
- error ("Unable to open file %s.", prog);
+ if (argv == NULL)
+ nomem (0);
- if (bfd_check_format (abfd, bfd_object) == 0)
- error ("File is not an object file.");
+ make_cleanup_freeargv (argv);
- if (sim_load (abfd, prog) != 0)
- return;
+ prog = tilde_expand (argv[0]);
- program_loaded = 1;
+ if (argv[1] != NULL)
+ error (_("GDB sim does not yet support a load offset."));
- sim_set_pc (abfd->start_address);
-}
+ if (remote_debug)
+ printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
-/*
- * 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 *abfd, char *prog) { return sim_load_standard (abfd); }
- */
+ /* 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"));
-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;
- }
+ /* FIXME: If a load command should reset the targets registers then
+ a call to sim_create_inferior() should go here. */
- return 0;
+ program_loaded = 1;
}
-/* Start an inferior process and set inferior_pid to its pid.
+
+/* Start an inferior process and set inferior_ptid to its pid.
EXEC_FILE is the file to run.
- ALLARGS is a string containing the arguments to the program.
+ 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. */
static void
-gdbsim_create_inferior (exec_file, args, env)
- char *exec_file;
- char *args;
- char **env;
+gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty)
{
- int len,entry_pt;
- char *arg_buf,**argv;
-
- if (! program_loaded)
- error ("No program loaded.");
-
- if (sr_get_debug ())
- printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
- exec_file, args);
+ int len;
+ char *arg_buf, **argv;
if (exec_file == 0 || exec_bfd == 0)
- error ("No exec file specified.");
+ warning (_("No executable file specified."));
+ if (!program_loaded)
+ warning (_("No program loaded."));
- entry_pt = (int) bfd_get_start_address (exec_bfd);
+ if (remote_debug)
+ printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
+ (exec_file ? exec_file : "(NULL)"),
+ args);
- gdbsim_kill (NULL, NULL);
+ gdbsim_kill ();
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);
- /* FIXME: remote-sim.h says targets that don't support this return
- non-zero. Perhaps distinguish between "not supported" and other errors?
- Or maybe that can be the only error. */
- if (sim_set_args (argv, env) != 0)
- return;
-
- inferior_pid = 42;
+ 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 */
- proceed (entry_pt, -1, 0);
+
+ clear_proceed_status ();
}
/* The open routine takes the rest of the parameters from the command,
/* Called when selecting the simulator. EG: (gdb) target sim name. */
static void
-gdbsim_open (args, from_tty)
- char *args;
- int from_tty;
+gdbsim_open (char *args, int from_tty)
{
- if (sr_get_debug ())
- printf_filtered ("gdbsim_open: args \"%s\"\n", args);
-
- if (sim_open (args) != 0)
+ 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 ())
{
- /* FIXME: This is totally bogus. sim_open should have a way to
- tell us what the error was, so we can tell the user. */
- error ("Unable to initialize simulator (insufficient memory?).");
- return;
+ 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);
- push_target (&gdbsim_ops);
- target_fetch_registers (-1);
+ 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
/* Close out all files and local state before this target loses control. */
static void
-gdbsim_close (quitting)
- int quitting;
+gdbsim_close (int quitting)
{
- if (sr_get_debug ())
+ if (remote_debug)
printf_filtered ("gdbsim_close: quitting %d\n", quitting);
program_loaded = 0;
- /* FIXME: Need to call sim_close() to close all files and
- delete all mappings. */
+ 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.
Use this when you want to detach and do something else with your gdb. */
static void
-gdbsim_detach (args,from_tty)
- char *args;
- int from_tty;
+gdbsim_detach (char *args, int from_tty)
{
- if (sr_get_debug ())
+ 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 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 (pid, step, siggnal)
- int pid, step, siggnal;
+gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal)
{
- if (sr_get_debug ())
+ 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);
- sim_resume (step, siggnal);
+ resume_siggnal = siggnal;
+ resume_step = step;
+}
+
+/* Notify the simulator of an asynchronous request to stop.
+
+ 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.
+
+ For simulators that do not support this operation, just abort */
+
+static void
+gdbsim_stop (void)
+{
+ 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. */
+ just as `wait' would. */
-static int
-gdbsim_wait (status)
- WAITTYPE *status;
+static void
+gdbsim_cntrl_c (int signo)
{
- if (sr_get_debug ())
- printf_filtered ("gdbsim_wait: ");
- WSETSTOP (*status, sim_stop_signal ());
- if (sr_get_debug ())
- printf_filtered ("status %d\n", *status);
- return inferior_pid;
+ 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)
+ {
+ 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
debugged. */
static void
-gdbsim_prepare_to_store ()
+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 (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target; /* ignored */
+gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
+ int write, struct mem_attrib *attrib,
+ struct target_ops *target)
{
- if (! program_loaded)
- error ("No program loaded.");
+ /* 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 (sr_get_debug ())
+ if (remote_debug)
{
- printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n",
- myaddr, memaddr, len, write);
- if (sr_get_debug () && write)
- dump_mem(myaddr, len);
+ /* 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)
{
- len = sim_write (memaddr, myaddr, len);
+ len = sim_write (gdbsim_desc, memaddr, myaddr, len);
}
- else
+ else
{
- len = sim_read (memaddr, myaddr, len);
- if (sr_get_debug () && len > 0)
- dump_mem(myaddr, len);
- }
+ len = sim_read (gdbsim_desc, memaddr, myaddr, len);
+ if (remote_debug && len > 0)
+ dump_mem (myaddr, len);
+ }
return len;
}
static void
-gdbsim_files_info (target)
- struct target_ops *target;
+gdbsim_files_info (struct target_ops *target)
{
char *file = "nothing";
if (exec_bfd)
file = bfd_get_filename (exec_bfd);
- if (sr_get_debug ())
+ 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 ();
+ sim_info (gdbsim_desc, 0);
}
}
-/* Clear the sims notion of what the break points are. */
+/* Clear the simulator's notion of what the break points are. */
static void
-gdbsim_mourn_inferior ()
-{
- if (sr_get_debug ())
+gdbsim_mourn_inferior (void)
+{
+ 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
+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 gdbsim_ops =
-{
- "sim", "simulator",
- "Use the simulator",
- gdbsim_open, gdbsim_close,
- 0, gdbsim_detach, gdbsim_resume, gdbsim_wait, /* attach */
- gdbsim_fetch_register, gdbsim_store_register,
- gdbsim_prepare_to_store,
- gdbsim_xfer_inferior_memory,
- gdbsim_files_info,
- 0, 0, /* Breakpoints */
- 0, 0, 0, 0, 0, /* Terminal handling */
- gdbsim_kill, /* kill */
- gdbsim_load,
- 0, /* lookup_symbol */
- gdbsim_create_inferior, /* create_inferior */
- gdbsim_mourn_inferior, /* mourn_inferior */
- 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;
+
+static void
+init_gdbsim_ops (void)
+{
+ 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 ()
+_initialize_remote_sim (void)
{
+ init_gdbsim_ops ();
add_target (&gdbsim_ops);
+
+ add_com ("sim", class_obscure, simulator_command,
+ _("Send a command to the simulator."));
}
projects / deliverable / binutils-gdb.git / blobdiff