mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
3e38efa06e
is to allow the simulator initialisation code to make use of the host callback facilities. Had discussed this with sac, and it should be a harmless change since none of the other simulators really make use of the call, and it does not return a result.
469 lines
12 KiB
C
469 lines
12 KiB
C
/* 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.
|
|
|
|
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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "inferior.h"
|
|
#include "wait.h"
|
|
#include "value.h"
|
|
#include "gdb_string.h"
|
|
#include <ctype.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <setjmp.h>
|
|
#include <errno.h>
|
|
#include "terminal.h"
|
|
#include "target.h"
|
|
#include "gdbcore.h"
|
|
#include "remote-sim.h"
|
|
#include "remote-utils.h"
|
|
#include "callback.h"
|
|
|
|
/* 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 gdbsim_ops;
|
|
|
|
static int program_loaded = 0;
|
|
|
|
static void
|
|
dump_mem (buf, len)
|
|
char *buf;
|
|
int 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
|
|
gdbsim_fetch_register (regno)
|
|
int 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));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gdbsim_store_register (regno)
|
|
int regno;
|
|
{
|
|
if (regno == -1)
|
|
{
|
|
for (regno = 0; regno < NUM_REGS; regno++)
|
|
gdbsim_store_register (regno);
|
|
}
|
|
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));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
static void
|
|
gdbsim_create_inferior (exec_file, args, env)
|
|
char *exec_file;
|
|
char *args;
|
|
char **env;
|
|
{
|
|
int len;
|
|
char *arg_buf,**argv;
|
|
CORE_ADDR entry_pt;
|
|
|
|
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);
|
|
|
|
if (exec_file == 0 || exec_bfd == 0)
|
|
error ("No exec file specified.");
|
|
|
|
entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
|
|
|
|
gdbsim_kill (NULL, NULL);
|
|
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);
|
|
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
|
|
gdbsim_open (args, from_tty)
|
|
char *args;
|
|
int from_tty;
|
|
{
|
|
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
|
|
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. */
|
|
|
|
static void
|
|
gdbsim_detach (args,from_tty)
|
|
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);
|
|
}
|
|
|
|
/* 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 (sr_get_debug ())
|
|
printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal);
|
|
|
|
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
|
|
gdbsim_prepare_to_store ()
|
|
{
|
|
/* Do nothing, since we can store individual regs */
|
|
}
|
|
|
|
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)
|
|
{
|
|
len = sim_write (memaddr, myaddr, len);
|
|
}
|
|
else
|
|
{
|
|
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);
|
|
|
|
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 (0);
|
|
}
|
|
}
|
|
|
|
/* Clear the simulator's notion of what the break points are. */
|
|
|
|
static void
|
|
gdbsim_mourn_inferior ()
|
|
{
|
|
if (sr_get_debug ())
|
|
printf_filtered ("gdbsim_mourn_inferior:\n");
|
|
|
|
remove_breakpoints ();
|
|
generic_mourn_inferior ();
|
|
}
|
|
|
|
/* 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 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 (&gdbsim_ops);
|
|
|
|
add_com ("sim <command>", class_obscure, simulator_command,
|
|
"Send a command to the simulator.");
|
|
}
|