/* Generic remote debugging interface for simulators.
Copyright 1993 Free Software Foundation, Inc.
- Contributed by Cygnus Support. Hacked from Steve Chamberlain's Z8000 work
- by Doug Evans. (dje@cygnus.com).
+ Contributed by Cygnus Support.
+ Steve Chamberlain (sac@cygnus.com) and Doug Evans (dje@cygnus.com).
This file is part of GDB.
#include "terminal.h"
#include "target.h"
#include "gdbcore.h"
-#include "simif.h"
+#include "remote-sim.h"
/* Naming conventions:
- sim_xxx are internal objects that describe top level interfaces to the
- simulator.
+ simif_xxx are internal objects that describe top level interfaces to the
+ simulator (simif for SIMulator InterFace, duh...).
- simif_xxx are external counterparts to the sim_xxx objects that must be
- provided by the simulator (simif for SIMulator InterFace, duh...).
+ sim_xxx are external counterparts to the simif_xxx objects that must be
+ provided by the simulator.
- A complete list of them is:
-
- --- Fetch one register and store the raw value in BUF.
-
-int simif_fetch_register (int regno, char *buf);
-
- --- Store VAL in one register.
-
-int simif_store_register (int regno, char *val);
-
- --- Complete terminate the simulator. This includes freeing all memory,
- closing all open files, and releasing all mmap'd memory.
-
-int simif_kill (void);
-
- --- Load program PROG into the simulator.
-
-int simif_load (bfd *abfd, char *prog);
-
- --- Set the arguments and environment for the program loaded into the
- simulator. ARGV and ENV are NULL terminated lists of pointers.
-
-int simif_set_args (char **argv, char **env);
-
- --- Initialize the simulator. This function is called when the simulator
- is selected from the command line. ARGS is passed from the command line
- and can be used to select whatever run time options the simulator provides.
- ARGS is the raw character string and must be parsed by the simulator.
-
-int simif_open (char *args);
-
- --- Start running the program, or resume it after a breakpoint.
- FIXME: What are A and B?
-
-int simif_resume (int a, int b);
-
- --- Fetch the reason why the program stopped running (breakpoint, signal,
- etc.)
-
-WAITTYPE simif_stop_signal (void);
-
- --- Write some data into the program's memory.
- Result is 0 for success, nonzero for failure.
-
-int simif_write (CORE_ADDR memaddr, char *myaddr, int len);
-
- --- Read some data from the program's memory.
- Result is 0 for success, nonzero for failure.
-
-int simif_read (CORE_ADDR memaddr, char *myaddr, int len);
-*/
+ See simif.h for a description. */
/* Forward data declarations */
-extern struct target_ops sim_ops;
+extern struct target_ops simif_ops;
int sim_verbose = 0; /* available to the simulator to use */
static void dump_mem ();
static void
-sim_fetch_register (regno)
+simif_fetch_register (regno)
int regno;
{
if (regno == -1)
{
- if (sim_verbose)
- printf_filtered ("sim_fetch_register: %d\n", regno);
- /* FIXME: Where did the 16 come from and what does it need to be? */
- for (regno = 0; regno < 16; regno++)
- sim_fetch_register (regno);
+ for (regno = 0; regno < NUM_REGS; regno++)
+ simif_fetch_register (regno);
}
else
{
char buf[MAX_REGISTER_RAW_SIZE];
- simif_fetch_register (regno, buf);
+ sim_fetch_register (regno, buf);
supply_register (regno, buf);
if (sim_verbose)
{
- printf_filtered ("sim_fetch_register: %d", regno);
- dump_mem (buf, sizeof (REGISTER_TYPE));
+ printf_filtered ("simif_fetch_register: %d", regno);
+ /* FIXME: We could print something more intelligible. */
+ dump_mem (buf, REGISTER_RAW_SIZE (regno));
}
}
}
static void
-sim_store_register (regno)
+simif_store_register (regno)
int regno;
{
if (regno == -1)
{
- if (sim_verbose)
- printf_filtered ("sim_store_register: %d\n", regno);
- /* FIXME: 16? */
- for (regno = 0; regno < 16; regno++)
- sim_store_register (regno);
+ for (regno = 0; regno < NUM_REGS; regno++)
+ simif_store_register (regno);
}
else
{
- char value[sizeof (REGISTER_TYPE)];
+ /* FIXME: Until read_register() returns LONGEST, we have this. */
+ char value[MAX_REGISTER_RAW_SIZE];
read_register_gen (regno, value);
- SWAP_TARGET_AND_HOST (value, sizeof (REGISTER_TYPE));
- simif_store_register (regno, value);
+ SWAP_TARGET_AND_HOST (value, REGISTER_RAW_SIZE (regno));
+ sim_store_register (regno, value);
if (sim_verbose)
{
- printf_filtered ("sim_store_register: %d", regno);
- dump_mem (value, sizeof (REGISTER_TYPE));
+ printf_filtered ("simif_store_register: %d", regno);
+ /* FIXME: We could print something more intelligible. */
+ dump_mem (value, REGISTER_RAW_SIZE (regno));
}
}
}
static void
-sim_kill (arg,from_tty)
-char *arg;
-int from_tty;
+simif_kill ()
{
if (sim_verbose)
- printf_filtered ("sim_kill: arg \"%s\"\n", arg);
+ printf_filtered ("simif_kill\n");
- simif_kill (); /* close fd's, remove mappings */
+ sim_kill (); /* close fd's, remove mappings */
inferior_pid = 0;
}
-/* Load program PROG into the sim. */
+/* 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
-sim_load (prog, fromtty)
+simif_load (prog, fromtty)
char *prog;
int fromtty;
{
bfd *abfd;
if (sim_verbose)
- printf_filtered ("sim_load: prog \"%s\"\n", prog);
+ printf_filtered ("simif_load: prog \"%s\"\n", prog);
inferior_pid = 0;
program_loaded = 0;
if (!abfd)
error ("Unable to open file %s.", prog);
- if (bfd_check_format (abfd, bfd_object) ==0)
+ if (bfd_check_format (abfd, bfd_object) == 0)
error ("File is not an object file.");
- if (simif_load (abfd, prog) != 0)
+ if (sim_load (abfd, prog) != 0)
return;
program_loaded = 1;
- simif_set_pc (abfd->start_address);
+ sim_set_pc (abfd->start_address);
+}
+
+/*
+ * 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 *bfd, char *prog) { return sim_load_standard (bfd); }
+ */
+
+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;
+ }
+
+ return 0;
}
+/* 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. */
static void
-sim_create_inferior (exec_file, args, env)
+simif_create_inferior (exec_file, args, env)
char *exec_file;
char *args;
char **env;
error ("No program loaded.");
if (sim_verbose)
- printf_filtered ("sim_create_inferior: exec_file \"%s\", args \"%s\"\n",
+ printf_filtered ("simif_create_inferior: exec_file \"%s\", args \"%s\"\n",
exec_file, args);
if (exec_file == 0 || exec_bfd == 0)
entry_pt = (int) bfd_get_start_address (exec_bfd);
- sim_kill (NULL, NULL);
+ simif_kill (NULL, NULL);
remove_breakpoints ();
init_wait_for_inferior ();
strcat (arg_buf, args);
argv = buildargv (arg_buf);
make_cleanup (freeargv, (char *) argv);
- simif_set_args (argv, env);
+ if (sim_set_args (argv, env) != 0)
+ return;
inferior_pid = 42;
insert_breakpoints (); /* Needed to get correct instruction in cache */
proceed (entry_pt, -1, 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 (args, from_tty)
+simif_open (args, from_tty)
char *args;
int from_tty;
{
if (sim_verbose)
- printf_filtered ("sim_open: args \"%s\"\n", args);
+ printf_filtered ("simif_open: args \"%s\"\n", args);
- if (simif_open (args) != 0)
+ if (sim_open (args) != 0)
{
error ("Unable to initialize simulator (insufficient memory?).");
return;
}
- push_target (&sim_ops);
+ push_target (&simif_ops);
target_fetch_registers (-1);
+ /* FIXME: check from_tty here? */
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)
+simif_close (quitting)
int quitting;
{
if (sim_verbose)
- printf_filtered ("sim_close: quitting %d\n", quitting);
+ printf_filtered ("simif_close: quitting %d\n", quitting);
program_loaded = 0;
- /* FIXME: Need to call simif_close() to close all files and
+ /* FIXME: Need to call sim_close() to close all files and
delete all mappings. */
}
+/* 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. */
+ Use this when you want to detach and do something else with your gdb. */
static void
-sim_detach (args,from_tty)
+simif_detach (args,from_tty)
char *args;
int from_tty;
{
if (sim_verbose)
- printf_filtered ("sim_detach: args \"%s\"\n", args);
+ printf_filtered ("simif_detach: args \"%s\"\n", args);
- pop_target (); /* calls sim_close to do the real work */
+ pop_target (); /* calls simif_close to do the real work */
if (from_tty)
printf_filtered ("Ending simulator %s debugging\n", target_shortname);
}
-/* Tell the remote machine to resume. */
-/* FIXME: What are A and B? */
+/* 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
-sim_resume (a,b)
+simif_resume (pid, step, siggnal)
+ int pid, step, siggnal;
{
if (sim_verbose)
- printf_filtered ("sim_resume: %d/%d\n", a, b);
+ printf_filtered ("simif_resume: step %d, signal %d\n", step, siggnal);
- simif_resume (a, b);
+ sim_resume (step, siggnal);
}
-/* Wait until the remote machine stops, then return,
- storing status in STATUS just as `wait' would. */
+/* 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
-sim_wait (status)
+simif_wait (status)
WAITTYPE *status;
{
if (sim_verbose)
- printf_filtered ("sim_wait: ");
+ printf_filtered ("simif_wait: ");
#if 1
- *status = simif_stop_signal ();
+ *status = sim_stop_signal ();
#else
- WSETSTOP (*status, simif_stop_signal ());
+ WSETSTOP (*status, sim_stop_signal ());
#endif
if (sim_verbose)
printf_filtered ("status %d\n", *status);
debugged. */
static void
-sim_prepare_to_store ()
+simif_prepare_to_store ()
{
/* Do nothing, since we can store individual regs */
}
static int
-sim_xfer_inferior_memory (memaddr, myaddr, len, write, target)
+simif_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 (sim_verbose)
{
- printf_filtered ("sim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n",
+ printf_filtered ("simif_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n",
myaddr, memaddr, len, write);
if (sim_verbose && write)
dump_mem(myaddr, len);
}
- if (! program_loaded)
- error ("No program loaded.");
-
if (write)
{
- len = simif_write (memaddr, myaddr, len);
+ len = sim_write (memaddr, myaddr, len);
}
else
{
- len = simif_read (memaddr, myaddr, len);
- if (sim_verbose && len > 0)
+ len = sim_read (memaddr, myaddr, len);
+ if (sim_verbose && len > 0)
dump_mem(myaddr, len);
}
return len;
}
static void
-sim_files_info ()
+simif_files_info (target)
+ struct target_ops *target;
{
char *file = "nothing";
file = bfd_get_filename (exec_bfd);
if (sim_verbose)
- printf_filtered ("sim_files_info: file \"%s\"\n", file);
+ printf_filtered ("simif_files_info: file \"%s\"\n", file);
if (exec_bfd)
- printf_filtered ("\tAttached to %s running program %s\n",
- target_shortname, file);
+ {
+ printf_filtered ("\tAttached to %s running program %s\n",
+ target_shortname, file);
+ sim_info ();
+ }
}
-/* Clear the sims notion of what the break points are */
+/* Clear the sims notion of what the break points are. */
+
static void
-sim_mourn ()
+simif_mourn_inferior ()
{
if (sim_verbose)
- printf_filtered ("sim_mourn:\n");
+ printf_filtered ("simif_mourn_inferior:\n");
remove_breakpoints ();
generic_mourn_inferior ();
/* Define the target subroutine names */
-struct target_ops sim_ops =
+struct target_ops simif_ops =
{
- "sim", "Simulator",
- "Use the Simulator",
- sim_open, sim_close,
- 0, sim_detach, sim_resume, sim_wait, /* attach */
- sim_fetch_register, sim_store_register,
- sim_prepare_to_store,
- sim_xfer_inferior_memory,
- sim_files_info,
+ "sim", "simulator",
+ "Use the simulator",
+ simif_open, simif_close,
+ 0, simif_detach, simif_resume, simif_wait, /* attach */
+ simif_fetch_register, simif_store_register,
+ simif_prepare_to_store,
+ simif_xfer_inferior_memory,
+ simif_files_info,
0, 0, /* Breakpoints */
0, 0, 0, 0, 0, /* Terminal handling */
- sim_kill, /* FIXME, kill */
- sim_load,
+ simif_kill, /* FIXME, kill */
+ simif_load,
0, /* lookup_symbol */
- sim_create_inferior, /* create_inferior */
- sim_mourn, /* mourn_inferior FIXME */
+ simif_create_inferior, /* create_inferior */
+ simif_mourn_inferior, /* mourn_inferior FIXME */
0, /* can_run */
0, /* notice_signals */
process_stratum, 0, /* next */
};
static void
-sim_snoop ()
+simif_snoop ()
{
sim_verbose = ! sim_verbose;
if (sim_verbose)
void
_initialize_remote_sim ()
{
- add_target (&sim_ops);
- add_com ("snoop", class_obscure, sim_snoop,
+ add_target (&simif_ops);
+ add_com ("snoop", class_obscure, simif_snoop,
"Show what commands are going to the simulator");
}
projects / deliverable / binutils-gdb.git / blobdiff