static int
gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len,
int write, struct mem_attrib *attrib,
struct target_ops *target)
{
if (!program_loaded)
error ("No program loaded.");
if (sr_get_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 (sr_get_debug () && write)
dump_mem (myaddr, len);
}
if (write)
{
len = sim_write (gdbsim_desc, memaddr, myaddr, len);
}
else
{
len = sim_read (gdbsim_desc, memaddr, myaddr, len);
if (sr_get_debug () && len > 0)
dump_mem (myaddr, len);
}
return len;
}
static void
gdbsim_store_register (int regno)
{
if (regno == -1)
{
for (regno = 0; regno < NUM_REGS; regno++)
gdbsim_store_register (regno);
return;
}
else if (REGISTER_SIM_REGNO (regno) >= 0)
{
char tmp[MAX_REGISTER_SIZE];
int nr_bytes;
deprecated_read_register_gen (regno, tmp);
nr_bytes = sim_store_register (gdbsim_desc,
REGISTER_SIM_REGNO (regno),
tmp, register_size (current_gdbarch, regno));
if (nr_bytes > 0 && nr_bytes != register_size (current_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 (sr_get_debug ())
{
printf_filtered ("gdbsim_store_register: %d", regno);
/* FIXME: We could print something more intelligible. */
dump_mem (tmp, register_size (current_gdbarch, regno));
}
}
}
static void
gdbsim_fetch_register (int regno)
{
if (regno == -1)
{
for (regno = 0; regno < NUM_REGS; regno++)
gdbsim_fetch_register (regno);
return;
}
switch (REGISTER_SIM_REGNO (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 (current_regcache, regno, buf);
set_register_cached (regno, -1);
break;
}
default:
{
static int warn_user = 1;
char buf[MAX_REGISTER_SIZE];
int nr_bytes;
gdb_assert (regno >= 0 && regno < NUM_REGS);
memset (buf, 0, MAX_REGISTER_SIZE);
nr_bytes = sim_fetch_register (gdbsim_desc,
REGISTER_SIM_REGNO (regno),
buf, register_size (current_gdbarch, regno));
if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno) && warn_user)
{
fprintf_unfiltered (gdb_stderr,
"Size of register %s (%d/%d) incorrect (%d instead of %d))",
REGISTER_NAME (regno),
regno, REGISTER_SIM_REGNO (regno),
nr_bytes, register_size (current_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 (current_regcache, regno, buf);
if (sr_get_debug ())
{
printf_filtered ("gdbsim_fetch_register: %d", regno);
/* FIXME: We could print something more intelligible. */
dump_mem (buf, register_size (current_gdbarch, regno));
}
break;
}
}
}
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 (sr_get_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;
}
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 (sr_get_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;
}
static void
gdbsim_mourn_inferior (void)
{
if (sr_get_debug ())
printf_filtered ("gdbsim_mourn_inferior:\n");
remove_breakpoints ();
generic_mourn_inferior ();
}
static void
gdbsim_detach (char *args, int from_tty)
{
if (sr_get_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);
}
static void
gdbsim_kill (void)
{
if (sr_get_debug ())
printf_filtered ("gdbsim_kill\n");
/* There is no need to `kill' running simulator - the simulator is
not running */
inferior_ptid = null_ptid;
}
static void
gdbsim_kill (void)
{
if (sr_get_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 ();
}
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 (sr_get_debug ())
printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
resume_siggnal = siggnal;
resume_step = step;
}
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 (sr_get_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 (sr_get_debug () && write)
dump_mem (myaddr, len);
}
if (write)
{
len = sim_write (gdbsim_desc, memaddr, myaddr, len);
}
else
{
len = sim_read (gdbsim_desc, memaddr, myaddr, len);
if (sr_get_debug () && len > 0)
dump_mem (myaddr, len);
}
return len;
}
static void
gdbsim_close (int quitting)
{
if (sr_get_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 ();
}
static void
gdbsim_files_info (struct target_ops *target)
{
char *file = "nothing";
if (exec_bfd)
file = bfd_get_filename (exec_bfd);
if (sr_get_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);
}
}
static void
gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty)
{
int len;
char *arg_buf, **argv;
if (exec_file == 0 || exec_bfd == 0)
warning ("No executable file specified.");
if (!program_loaded)
warning ("No program loaded.");
if (sr_get_debug ())
printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
(exec_file ? exec_file : "(NULL)"),
args);
gdbsim_kill ();
remove_breakpoints ();
init_wait_for_inferior ();
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);
insert_breakpoints (); /* Needed to get correct instruction in cache */
clear_proceed_status ();
/* NB: Entry point already set by sim_create_inferior. */
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0);
}
static void
gdbsim_load (char *prog, int fromtty)
{
if (sr_get_debug ())
printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
inferior_ptid = null_ptid;
/* 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;
}
static void
gdbsim_open (char *args, int from_tty)
{
int len;
char *arg_buf;
char **argv;
if (sr_get_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 both selectable
and 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);
target_fetch_registers (-1);
printf_filtered ("Connected to the simulator.\n");
}