-/* 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.
+ Copyright 1993, 1994 Free Software Foundation, Inc.
+ Contributed by Cygnus Support.
+ Steve Chamberlain (sac@cygnus.com).
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#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 "callback.h"
+
+/* Prototypes */
+
+static void dump_mem PARAMS ((char *buf, int len));
+
+static void gdbsim_fetch_register PARAMS ((int regno));
+
+static void gdbsim_store_register PARAMS ((int regno));
+
+static void gdbsim_kill PARAMS ((void));
+
+static void gdbsim_load PARAMS ((char *prog, int fromtty));
+
+static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env));
+
+static void gdbsim_open PARAMS ((char *args, int from_tty));
+
+static void gdbsim_close PARAMS ((int quitting));
+
+static void gdbsim_detach PARAMS ((char *args, int from_tty));
+
+static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal));
+
+static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status));
+
+static void gdbsim_prepare_to_store PARAMS ((void));
+
+static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr,
+ char *myaddr, int len,
+ int write,
+ struct target_ops *target));
+
+static void gdbsim_files_info PARAMS ((struct target_ops *target));
+
+static void gdbsim_mourn_inferior PARAMS ((void));
+
+static void simulator_command PARAMS ((char *args, int from_tty));
+
+/* Naming convention:
+
+ sim_* are the interface to the simulator (see remote-sim.h).
+ sim_callback_* are the stuff which the simulator can see inside GDB.
+ 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;
+static int program_loaded = 0;
+
+static void
+dump_mem (buf, len)
+ 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%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");
+ }
+ }
}
static void
-store_register(regno)
+gdbsim_fetch_register (regno)
int regno;
{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- store_register(regno);
- }
- else
- {
- sim_store_register(regno, read_register(regno));
- }
+ if (regno == -1)
+ {
+ for (regno = 0; regno < NUM_REGS; regno++)
+ gdbsim_fetch_register (regno);
+ }
+ else
+ {
+ char buf[MAX_REGISTER_RAW_SIZE];
+
+ 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));
+ }
+ }
}
-/*
- * Download a file specified in 'args', to the sim.
- */
static void
-sim_load(args,fromtty)
-char *args;
-int fromtty;
+gdbsim_store_register (regno)
+int regno;
{
- bfd *abfd;
- asection *s;
-
- inferior_pid = 0;
- abfd = bfd_openr(args, (char*)0);
-
- if (!abfd)
- {
- printf_filtered("Unable to open file %s\n", args);
- return;
- }
-
- if (bfd_check_format(abfd, bfd_object) ==0)
- {
- printf_filtered("File is not an object file\n");
- return ;
- }
-
- s = abfd->sections;
- while (s != (asection *)NULL)
- {
- if (s->flags & SEC_LOAD)
+ if (regno == -1)
{
- 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_inferior_memory(s->vma + i, buffer, sub_delta);
- printf_filtered("*");
- fflush(stdout);
- }
- printf_filtered( "\n");
- free(buffer);
+ for (regno = 0; regno < NUM_REGS; regno++)
+ gdbsim_store_register (regno);
}
- s = s->next;
- }
+ else
+ {
+ /* FIXME: Until read_register() returns LONGEST, we have this. */
+ char tmp[MAX_REGISTER_RAW_SIZE];
+ read_register_gen (regno, tmp);
+ sim_store_register (regno, tmp);
+ if (sr_get_debug ())
+ {
+ printf_filtered ("gdbsim_store_register: %d", regno);
+ /* FIXME: We could print something more intelligible. */
+ dump_mem (tmp, REGISTER_RAW_SIZE (regno));
+ }
+ }
+}
- sim_store_register(PC_REGNUM, abfd->start_address);
+/* Kill the running program. This may involve closing any open files
+ and releasing other resources acquired by the simulated program. */
+
+static void
+gdbsim_kill ()
+{
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_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
+gdbsim_load (prog, fromtty)
+ char *prog;
+ int fromtty;
+{
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
+
+ inferior_pid = 0;
+
+ /* This must be done before calling gr_load_image. */
+ program_loaded = 1;
+
+ if (sim_load (prog, fromtty) != 0)
+ generic_load (prog, fromtty);
+}
+
+
+/* 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. */
-void
-sim_create_inferior (execfile, args, env)
- char *execfile;
+
+static void
+gdbsim_create_inferior (exec_file, args, env)
+ char *exec_file;
char *args;
char **env;
{
- int entry_pt;
+ int len;
+ char *arg_buf,**argv;
+ CORE_ADDR entry_pt;
+
+ if (! program_loaded)
+ error ("No program loaded.");
- if (args && *args)
- error ("Can't pass arguments to remote sim process.");
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
+ exec_file, args);
- if (execfile == 0 || exec_bfd == 0)
- error ("No exec file specified");
+ if (exec_file == 0 || exec_bfd == 0)
+ error ("No exec file specified.");
- entry_pt = (int) bfd_get_start_address (exec_bfd);
+ entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
+
+ gdbsim_kill ();
+ remove_breakpoints ();
init_wait_for_inferior ();
- insert_breakpoints ();
- proceed(entry_pt, -1, 0);
-}
+ 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);
+ sim_create_inferior (entry_pt, argv, env);
+
+ inferior_pid = 42;
+ insert_breakpoints (); /* Needed to get correct instruction in cache */
+ proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 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
-sim_open (name, from_tty)
- char *name;
+gdbsim_open (args, from_tty)
+ char *args;
int from_tty;
{
- if(name == 0)
- {
- name = "";
- }
- push_target (&sim_ops);
- target_fetch_registers(-1);
- printf_filtered("Connected to the simulator.\n");
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)");
+
+ sim_set_callbacks (&default_callback);
+ default_callback.init (&default_callback);
+
+ sim_open (args);
+
+ push_target (&gdbsim_ops);
+ target_fetch_registers (-1);
+ 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
-sim_close (quitting)
+gdbsim_close (quitting)
int quitting;
{
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_close: quitting %d\n", quitting);
+
+ program_loaded = 0;
+
+ sim_close (quitting);
}
+/* 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)
+ 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;
{
- pop_target(); /* calls sim_close to do the real work */
- if (from_tty)
- printf_filtered ("Ending remote %s debugging\n", target_shortname);
+ 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);
}
-/* Tell the remote machine to resume. */
+/* 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
+gdbsim_resume (pid, step, siggnal)
+ int pid, step;
+ enum target_signal siggnal;
+{
+ if (inferior_pid != 42)
+ error ("The program is not being run.");
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would. */
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
-int
-sim_wait (status)
- WAITTYPE *status;
-{
- WSETSTOP(*status, sim_stop_signal());
- return 0;
+ sim_resume (step, target_signal_to_host (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
+gdbsim_wait (pid, status)
+ int pid;
+ struct target_waitstatus *status;
+{
+ int sigrc;
+ enum sim_stop reason;
+
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_wait\n");
+
+ sim_stop_reason (&reason, &sigrc);
+ switch (reason)
+ {
+ case sim_exited:
+ status->kind = TARGET_WAITKIND_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);
+ break;
+ case sim_signalled:
+ status->kind = TARGET_WAITKIND_SIGNALLED;
+ /* The signal in sigrc is a host signal. That probably
+ should be fixed. */
+ status->value.sig = target_signal_from_host (sigrc);
+ break;
+ }
+
+ return inferior_pid;
+}
+
+/* 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
-fetch_register(regno)
-int regno;
+gdbsim_prepare_to_store ()
{
- if (regno == -1)
- {
- for (regno = 0; regno < NUM_REGS; regno++)
- fetch_register(regno);
- }
- else
- {
- char buf[MAX_REGISTER_RAW_SIZE];
- sim_fetch_register(regno, buf);
- supply_register(regno, buf);
- }
+ /* Do nothing, since we can store individual regs */
}
-
-int
-sim_xfer_inferior_memory(memaddr, myaddr, len, write, target)
+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 */
{
+ if (! program_loaded)
+ error ("No program loaded.");
+
+ if (sr_get_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);
+ }
+
if (write)
- {
- sim_write(memaddr, myaddr, len);
- }
+ {
+ len = sim_write (memaddr, myaddr, len);
+ }
else
- {
- sim_read(memaddr, myaddr, len);
- }
+ {
+ len = sim_read (memaddr, myaddr, len);
+ if (sr_get_debug () && len > 0)
+ dump_mem(myaddr, len);
+ }
return len;
}
+static void
+gdbsim_files_info (target)
+ struct target_ops *target;
+{
+ char *file = "nothing";
+
+ if (exec_bfd)
+ file = bfd_get_filename (exec_bfd);
-/* 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 (sr_get_debug ())
+ printf_filtered ("gdbsim_files_info: file \"%s\"\n", file);
-void
-sim_before_main_loop ()
-{
- push_target (&sim_ops);
+ if (exec_bfd)
+ {
+ printf_filtered ("\tAttached to %s running program %s\n",
+ target_shortname, file);
+ sim_info (0);
+ }
}
+/* Clear the simulator's notion of what the break points are. */
-static void rem_resume(a,b)
-{
- sim_resume(a,b);
+static void
+gdbsim_mourn_inferior ()
+{
+ if (sr_get_debug ())
+ printf_filtered ("gdbsim_mourn_inferior:\n");
+
+ remove_breakpoints ();
+ generic_mourn_inferior ();
}
-void
-pstore()
+/* Put a command string, in args, out to MONITOR. Output from MONITOR
+ is placed on the users terminal until the prompt is seen. FIXME: We
+ read the characters ourseleves here cause of a nasty echo. */
+
+static void
+simulator_command (args, from_tty)
+ char *args;
+ int from_tty;
{
+ sim_do_command (args);
}
+
/* 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 = {
+ "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 */
};
-/***********************************************************************/
-
void
_initialize_remote_sim ()
{
- add_target (&sim_ops);
-}
-
+ add_target (&gdbsim_ops);
+ add_com ("sim <command>", class_obscure, simulator_command,
+ "Send a command to the simulator.");
+}
projects / deliverable / binutils-gdb.git / blobdiff