#include "callback.h"
#include "remote-sim.h"
#include "remote-utils.h"
+#include "command.h"
/* Prototypes */
static void gdb_os_flush_stderr PARAMS ((host_callback *));
+static int gdb_os_poll_quit PARAMS ((host_callback *));
+
/* printf_filtered is depreciated */
static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...));
static void gdbsim_mourn_inferior PARAMS ((void));
+static void gdbsim_stop PARAMS ((void));
+
static void simulator_command PARAMS ((char *args, int from_tty));
/* Naming convention:
gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered;
gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered;
gdb_callback.error = gdb_os_error;
- sim_set_callbacks (gdbsim_desc, &gdb_callback);
+ gdb_callback.poll_quit = gdb_os_poll_quit;
+ gdb_callback.magic = HOST_CALLBACK_MAGIC;
callbacks_initialized = 1;
}
}
static void
gdbsim_fetch_register (regno)
-int regno;
+ int regno;
{
+ static int warn_user = 1;
if (regno == -1)
{
for (regno = 0; regno < NUM_REGS; regno++)
gdbsim_fetch_register (regno);
}
- else
+ else if (reg_names[regno] != NULL && *reg_names[regno] != '\0')
{
char buf[MAX_REGISTER_RAW_SIZE];
-
- sim_fetch_register (gdbsim_desc, regno, buf);
+ int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno));
+ if (nr_bytes == 0)
+ /* register not applicable, supply zero's */
+ memset (buf, 0, MAX_REGISTER_RAW_SIZE);
+ else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)
+ && warn_user)
+ {
+ printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))",
+ reg_names [regno], regno,
+ nr_bytes, REGISTER_RAW_SIZE (regno));
+ warn_user = 0;
+ }
supply_register (regno, buf);
if (sr_get_debug ())
{
static void
gdbsim_store_register (regno)
-int regno;
+ int regno;
{
if (regno == -1)
{
for (regno = 0; regno < NUM_REGS; regno++)
gdbsim_store_register (regno);
}
- else
+ else if (reg_names[regno] != NULL && *reg_names[regno] != '\0')
{
- /* FIXME: Until read_register() returns LONGEST, we have this. */
char tmp[MAX_REGISTER_RAW_SIZE];
+ int nr_bytes;
read_register_gen (regno, tmp);
- sim_store_register (gdbsim_desc, regno, tmp);
+ nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno));
+ if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno))
+ fatal ("Register size different to expected");
if (sr_get_debug ())
{
printf_filtered ("gdbsim_store_register: %d", regno);
if (sr_get_debug ())
printf_filtered ("gdbsim_kill\n");
- sim_kill (gdbsim_desc); /* close fd's, remove mappings, etc. */
+ /* There is no need to `kill' running simulator - the simulator is
+ not running */
inferior_pid = 0;
}
inferior_pid = 0;
- /* This must be done before calling gr_load_image. */
- program_loaded = 1;
+ /* 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. */
- if (sim_load (gdbsim_desc, prog, fromtty) != 0)
- generic_load (prog, fromtty);
+ program_loaded = 1;
}
{
int len;
char *arg_buf,**argv;
- CORE_ADDR entry_pt;
+ if (exec_file == 0 || exec_bfd == 0)
+ warning ("No exec file specified.");
if (! program_loaded)
- error ("No program loaded.");
+ warning ("No program loaded.");
if (sr_get_debug ())
printf_filtered ("gdbsim_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 = (CORE_ADDR) bfd_get_start_address (exec_bfd);
+ (exec_file ? exec_file: "(NULL)"),
+ args);
gdbsim_kill ();
remove_breakpoints ();
init_wait_for_inferior ();
- 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, (char *) argv);
- sim_create_inferior (gdbsim_desc, entry_pt, argv, env);
+ 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, (char *) argv);
+ }
+ else
+ argv = NULL;
+ sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
inferior_pid = 42;
- insert_breakpoints (); /* Needed to get correct instruction in cache */
- proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0);
+ 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);
}
/* The open routine takes the rest of the parameters from the command,
if (gdbsim_desc != NULL)
unpush_target (&gdbsim_ops);
- init_callbacks ();
-
- len = 7 + 1 + (args ? strlen (args) : 0) + 1 + /*slop*/ 10;
+ 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");
+ 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). */
+#ifdef TARGET_BYTE_ORDER_SELECTABLE
+ if (!target_byte_order_auto)
+ {
+ switch (TARGET_BYTE_ORDER)
+ {
+ case BIG_ENDIAN:
+ strcat (arg_buf, " -E big");
+ break;
+ case LITTLE_ENDIAN:
+ strcat (arg_buf, " -E little");
+ break;
+ default:
+ fatal ("Value of TARGET_BYTE_ORDER unknown");
+ }
+ }
+#endif
+ /* Specify the architecture of the target when it has been
+ explicitly specified */
+ if (!target_architecture_auto)
+ {
+ strcat (arg_buf, " --architecture=");
+ strcat (arg_buf, target_architecture->printable_name);
+ }
+ /* finally, any explicit args */
if (args)
{
- strcat (arg_buf, " ");
+ strcat (arg_buf, " "); /* 1 */
strcat (arg_buf, args);
}
argv = buildargv (arg_buf);
error ("Insufficient memory available to allocate simulator arg list.");
make_cleanup (freeargv, (char *) argv);
- gdbsim_desc = sim_open (SIM_OPEN_DEBUG, 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");
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;
if (sr_get_debug ())
printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
- sim_resume (gdbsim_desc, step, target_signal_to_host (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 ()
+{
+ 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 (p)
+ host_callback *p;
+{
+ notice_quit ();
+ 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 void
+gdbsim_cntrl_c (signo)
+ int signo;
+{
+ gdbsim_stop ();
+}
static int
gdbsim_wait (pid, status)
int pid;
struct target_waitstatus *status;
{
- int sigrc;
- enum sim_stop reason;
+ 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,
+ target_signal_to_host (resume_siggnal));
+ signal (SIGINT, prev_sigint);
+ resume_step = 0;
+
sim_stop_reason (gdbsim_desc, &reason, &sigrc);
+
switch (reason)
{
case sim_exited:
status->value.integer = sigrc;
break;
case sim_stopped:
- status->kind = TARGET_WAITKIND_STOPPED;
- /* The signal in sigrc is a host signal. That probably
- should be fixed. */
- status->value.sig = target_signal_from_host (sigrc);
+ switch (sigrc)
+ {
+ case SIGABRT:
+ quit ();
+ break;
+ case SIGINT:
+ case SIGTRAP:
+ default:
+ status->kind = TARGET_WAITKIND_STOPPED;
+ /* The signal in sigrc is a host signal. That probably
+ should be fixed. */
+ status->value.sig = target_signal_from_host (sigrc);
+ break;
+ }
break;
case sim_signalled:
status->kind = TARGET_WAITKIND_SIGNALLED;
should be fixed. */
status->value.sig = target_signal_from_host (sigrc);
break;
+ case sim_running:
+ case sim_polling:
+ /* FIXME: Is this correct? */
+ break;
}
return inferior_pid;
generic_mourn_inferior ();
}
+static int
+gdbsim_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+#ifdef SIM_HAS_BREAKPOINTS
+ SIM_RC retcode;
+
+ retcode = sim_set_breakpoint (gdbsim_desc, addr);
+
+ switch (retcode)
+ {
+ case SIM_RC_OK:
+ return 0;
+ case SIM_RC_INSUFFICIENT_RESOURCES:
+ return ENOMEM;
+ default:
+ return EIO;
+ }
+#else
+ return memory_insert_breakpoint (addr, contents_cache);
+#endif
+}
+
+static int
+gdbsim_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+#ifdef SIM_HAS_BREAKPOINTS
+ SIM_RC retcode;
+
+ retcode = sim_clear_breakpoint (gdbsim_desc, addr);
+
+ switch (retcode)
+ {
+ case SIM_RC_OK:
+ case SIM_RC_UNKNOWN_BREAKPOINT:
+ return 0;
+ case SIM_RC_INSUFFICIENT_RESOURCES:
+ return ENOMEM;
+ default:
+ return EIO;
+ }
+#else
+ return memory_remove_breakpoint (addr, contents_cache);
+#endif
+}
+
/* Pass the command argument through to the simulator verbatim. The
simulator must do any command interpretation work. */
char *args;
int from_tty;
{
- /* The user may give a command before the simulator is opened, so
- ensure that the callbacks have been set up. */
- init_callbacks ();
+ 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");
+ }
- /* Note that if the simulator hasn't been opened, gdbsim_desc == NULL
- which is correct (??? assuming of course one wishes to continue to
- allow commands to be sent to unopened simulators, which isn't entirely
- unreasonable). Simulators should be prepared to deal with any
- combination of NULL or empty args. */
sim_do_command (gdbsim_desc, args);
}
/* Define the target subroutine names */
-struct target_ops gdbsim_ops = {
- "sim", /* to_shortname */
- "simulator", /* to_longname */
- "Use the compiled-in simulator.", /* to_doc */
- gdbsim_open, /* to_open */
- gdbsim_close, /* to_close */
- NULL, /* to_attach */
- gdbsim_detach, /* to_detach */
- gdbsim_resume, /* to_resume */
- gdbsim_wait, /* to_wait */
- gdbsim_fetch_register, /* to_fetch_registers */
- gdbsim_store_register, /* to_store_registers */
- gdbsim_prepare_to_store, /* to_prepare_to_store */
- gdbsim_xfer_inferior_memory, /* to_xfer_memory */
- gdbsim_files_info, /* to_files_info */
- memory_insert_breakpoint, /* to_insert_breakpoint */
- memory_remove_breakpoint, /* to_remove_breakpoint */
- NULL, /* to_terminal_init */
- NULL, /* to_terminal_inferior */
- NULL, /* to_terminal_ours_for_output */
- NULL, /* to_terminal_ours */
- NULL, /* to_terminal_info */
- gdbsim_kill, /* to_kill */
- gdbsim_load, /* to_load */
- NULL, /* to_lookup_symbol */
- gdbsim_create_inferior, /* to_create_inferior */
- gdbsim_mourn_inferior, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- 0, /* to_thread_alive */
- 0, /* to_stop */
- process_stratum, /* to_stratum */
- NULL, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- NULL, /* sections */
- NULL, /* sections_end */
- OPS_MAGIC, /* to_magic */
-};
+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_attach = NULL;
+ 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.to_xfer_memory = gdbsim_xfer_inferior_memory;
+ gdbsim_ops.to_files_info = gdbsim_files_info;
+ gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint;
+ gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint;
+ gdbsim_ops.to_terminal_init = NULL;
+ gdbsim_ops.to_terminal_inferior = NULL;
+ gdbsim_ops.to_terminal_ours_for_output = NULL;
+ gdbsim_ops.to_terminal_ours = NULL;
+ gdbsim_ops.to_terminal_info = NULL;
+ gdbsim_ops.to_kill = gdbsim_kill;
+ gdbsim_ops.to_load = gdbsim_load;
+ gdbsim_ops.to_lookup_symbol = NULL;
+ gdbsim_ops.to_create_inferior = gdbsim_create_inferior;
+ gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior;
+ gdbsim_ops.to_can_run = 0;
+ gdbsim_ops.to_notice_signals = 0;
+ gdbsim_ops.to_thread_alive = 0;
+ gdbsim_ops.to_stop = gdbsim_stop;
+ gdbsim_ops.to_stratum = process_stratum;
+ gdbsim_ops.DONT_USE = NULL;
+ 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_sections = NULL;
+ gdbsim_ops.to_sections_end = NULL;
+ gdbsim_ops.to_magic = OPS_MAGIC;
+
+#ifdef TARGET_REDEFINE_DEFAULT_OPS
+ TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops);
+#endif
+}
void
_initialize_remote_sim ()
{
+ init_gdbsim_ops() ;
+
add_target (&gdbsim_ops);
add_com ("sim <command>", class_obscure, simulator_command,
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