binutils-gdb/gdb/remote-sim.c

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/* Generic remote debugging interface for simulators.
2002-01-19 04:32:43 +01:00
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
2002 Free Software Foundation, Inc.
Contributed by Cygnus Support.
Steve Chamberlain (sac@cygnus.com).
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This file is part of GDB.
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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.
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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.
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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 "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 "gdb/callback.h"
#include "gdb/remote-sim.h"
#include "remote-utils.h"
#include "command.h"
#include "regcache.h"
#include "gdb_assert.h"
#include "sim-regno.h"
/* Prototypes */
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extern void _initialize_remote_sim (void);
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extern int (*ui_loop_hook) (int signo);
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static void dump_mem (char *buf, int len);
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static void init_callbacks (void);
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static void end_callbacks (void);
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static int gdb_os_write_stdout (host_callback *, const char *, int);
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static void gdb_os_flush_stdout (host_callback *);
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static int gdb_os_write_stderr (host_callback *, const char *, int);
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static void gdb_os_flush_stderr (host_callback *);
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static int gdb_os_poll_quit (host_callback *);
/* printf_filtered is depreciated */
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static void gdb_os_printf_filtered (host_callback *, const char *, ...);
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static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list);
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static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list);
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static void gdb_os_error (host_callback *, const char *, ...);
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static void gdbsim_fetch_register (int regno);
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static void gdbsim_store_register (int regno);
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static void gdbsim_kill (void);
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static void gdbsim_load (char *prog, int fromtty);
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static void gdbsim_create_inferior (char *exec_file, char *args, char **env);
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static void gdbsim_open (char *args, int from_tty);
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static void gdbsim_close (int quitting);
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static void gdbsim_detach (char *args, int from_tty);
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static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal);
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static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status);
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static void gdbsim_prepare_to_store (void);
* exec.c (xfer_memory): Add attrib argument. * infptrace.c (child_xfer_memory): Likewise. * monitor.c (monitor_xfer_memory): Likewise. * remote-adapt.c (adapt_xfer_inferior_memory): Likewise. * remote-array.c (array_xfer_memory): Likewise. * remote-bug.c (bug_xfer_memory): Likewise. * remote-e7000.c (e7000_xfer_inferior_memory): Likewise. * remote-eb.c (eb_xfer_inferior_memory): Likewise. * remote-es.c (es1800_xfer_inferior_memory): Likewise. * remote-mips.c (mips_xfer_memory): Likewise. * remote-mm.c (mm_xfer_inferior_memory): Likewise. * remote-nindy.c (nindy_xfer_inferior_memory): Likewise. * remote-os9k.c (rombug_xfer_inferior_memory): Likewise. * remote-rdi.c (arm_rdi_xfer_memory): Likewise. * remote-rdp.c (remote_rdp_xfer_inferior_memory): Likewise. * remote-sds.c (sds_xfer_memory): Likewise. * remote-sim.c (gdbsim_xfer_inferior_memory): Likewise. * remote-st.c (st2000_xfer_inferior_memory): Likewise. * remote-udi.c (udi_xfer_inferior_memory): Likewise. * remote-vx.c (vx_xfer_memory): Likewise. * remote.c (remote_xfer_memory): Likewise. * target.c (debug_to_xfer_memory, do_xfer_memory): Likewise. * target.h (child_xfer_memory, do_xfer_memory, xfer_memory): Likewise. * target.h (#include "memattr.h"): Added. (target_ops.to_xfer_memory): Add attrib argument. * wince.c (_initialize_inftarg): Removed call to set_dcache_state. * dcache.h (set_dcache_state): Removed declaration. * dcache.c (set_dcache_state): Removed definition * dcache.c: Update module comment, as dcache is now enabled and disabled with memory region attributes instead of by the global variable "remotecache". Add comment describing the interaction between dcache and memory region attributes. (dcache_xfer_memory): Add comment describing benefits of moving cache writeback to a higher level. (dcache_struct): Removed cache_has_stuff field. This was used to record whether the cache had been accessed in order to invalidate it when it was disabled. However, this is not needed because the cache is write through and the code that enables, disables, and deletes memory regions invalidate the cache. Add comment which suggests that we could be more selective and only invalidate those cache lines containing data from those memory regions. (dcache_invalidate): Updated. (dcache_xfer_memory): Updated. (dcache_alloc): Don't abort() if dcache_enabled_p is clear. (dcache_xfer_memory): Removed code that called do_xfer_memory() to perform a uncached transfer if dcache_enabled_p was clear. This function is now only called if caching is enabled for the memory region. (dcache_info): Always print cache info. * target.c (do_xfer_memory): Add attrib argument. (target_xfer_memory, target_xfer_memory_partial): Break transfer into chunks defined by memory regions, pass region attributes to do_xfer_memory(). * dcache.c (dcache_read_line, dcache_write_line): Likewise. * Makefile.in (SFILES): Add memattr.c. (COMMON_OBS): Add memattr.o. (dcache.o): Add target.h to dependencies. * memattr.c: New file. * memattr.h: Likewise.
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static int gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr,
int len, int write,
struct mem_attrib *attrib,
struct target_ops *target);
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static void gdbsim_files_info (struct target_ops *target);
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static void gdbsim_mourn_inferior (void);
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static void gdbsim_stop (void);
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void simulator_command (char *args, int from_tty);
/* Naming convention:
sim_* are the interface to the simulator (see remote-sim.h).
gdbsim_* are stuff which is internal to gdb. */
/* Forward data declarations */
extern struct target_ops gdbsim_ops;
static int program_loaded = 0;
/* We must keep track of whether the simulator has been opened or not because
GDB can call a target's close routine twice, but sim_close doesn't allow
this. We also need to record the result of sim_open so we can pass it
back to the other sim_foo routines. */
static SIM_DESC gdbsim_desc = 0;
static void
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dump_mem (char *buf, int len)
{
if (len <= 8)
{
if (len == 8 || len == 4)
{
long l[2];
memcpy (l, buf, len);
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printf_filtered ("\t0x%lx", l[0]);
if (len == 8)
printf_filtered (" 0x%lx", l[1]);
printf_filtered ("\n");
}
else
{
int i;
printf_filtered ("\t");
for (i = 0; i < len; i++)
printf_filtered ("0x%x ", buf[i]);
printf_filtered ("\n");
}
}
}
static host_callback gdb_callback;
static int callbacks_initialized = 0;
/* Initialize gdb_callback. */
static void
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init_callbacks (void)
{
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if (!callbacks_initialized)
{
gdb_callback = default_callback;
gdb_callback.init (&gdb_callback);
gdb_callback.write_stdout = gdb_os_write_stdout;
gdb_callback.flush_stdout = gdb_os_flush_stdout;
gdb_callback.write_stderr = gdb_os_write_stderr;
gdb_callback.flush_stderr = gdb_os_flush_stderr;
gdb_callback.printf_filtered = gdb_os_printf_filtered;
gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered;
gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered;
gdb_callback.error = gdb_os_error;
gdb_callback.poll_quit = gdb_os_poll_quit;
gdb_callback.magic = HOST_CALLBACK_MAGIC;
callbacks_initialized = 1;
}
}
/* Release callbacks (free resources used by them). */
static void
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end_callbacks (void)
{
if (callbacks_initialized)
{
gdb_callback.shutdown (&gdb_callback);
callbacks_initialized = 0;
}
}
/* GDB version of os_write_stdout callback. */
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static int
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gdb_os_write_stdout (host_callback *p, const char *buf, int len)
{
int i;
char b[2];
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ui_file_write (gdb_stdtarg, buf, len);
return len;
}
/* GDB version of os_flush_stdout callback. */
static void
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gdb_os_flush_stdout (host_callback *p)
{
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gdb_flush (gdb_stdtarg);
}
/* GDB version of os_write_stderr callback. */
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static int
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gdb_os_write_stderr (host_callback *p, const char *buf, int len)
{
int i;
char b[2];
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for (i = 0; i < len; i++)
{
b[0] = buf[i];
b[1] = 0;
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fputs_unfiltered (b, gdb_stdtarg);
}
return len;
}
/* GDB version of os_flush_stderr callback. */
static void
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gdb_os_flush_stderr (host_callback *p)
{
gdb_flush (gdb_stderr);
}
/* GDB version of printf_filtered callback. */
static void
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gdb_os_printf_filtered (host_callback * p, const char *format,...)
{
va_list args;
va_start (args, format);
vfprintf_filtered (gdb_stdout, format, args);
va_end (args);
}
/* GDB version of error vprintf_filtered. */
static void
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gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap)
{
vfprintf_filtered (gdb_stdout, format, ap);
}
/* GDB version of error evprintf_filtered. */
static void
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gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap)
{
vfprintf_filtered (gdb_stderr, format, ap);
}
/* GDB version of error callback. */
static void
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gdb_os_error (host_callback * p, const char *format,...)
{
if (error_hook)
(*error_hook) ();
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else
{
va_list args;
va_start (args, format);
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verror (format, args);
va_end (args);
}
}
int
one2one_register_sim_regno (int regnum)
{
/* Only makes sense to supply raw registers. */
gdb_assert (regnum >= 0 && regnum < NUM_REGS);
return regnum;
}
static void
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gdbsim_fetch_register (int regno)
{
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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 = alloca (MAX_REGISTER_RAW_SIZE);
int nr_bytes;
memset (buf, 0, MAX_REGISTER_RAW_SIZE);
supply_register (regno, buf);
set_register_cached (regno, -1);
break;
}
default:
{
static int warn_user = 1;
char *buf = alloca (MAX_REGISTER_RAW_SIZE);
int nr_bytes;
gdb_assert (regno >= 0 && regno < NUM_REGS);
memset (buf, 0, MAX_REGISTER_RAW_SIZE);
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nr_bytes = sim_fetch_register (gdbsim_desc,
REGISTER_SIM_REGNO (regno),
buf, REGISTER_RAW_SIZE (regno));
if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (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_RAW_SIZE (regno));
warn_user = 0;
}
/* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
indicatingthat 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. */
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));
}
break;
}
}
}
static void
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gdbsim_store_register (int regno)
{
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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_RAW_SIZE];
int nr_bytes;
read_register_gen (regno, tmp);
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nr_bytes = sim_store_register (gdbsim_desc,
REGISTER_SIM_REGNO (regno),
tmp, REGISTER_RAW_SIZE (regno));
if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno))
internal_error (__FILE__, __LINE__,
"Register size different to expected");
/* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0'
indicatingthat 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_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
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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 */
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inferior_ptid = null_ptid;
}
/* 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
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gdbsim_load (char *prog, int fromtty)
{
if (sr_get_debug ())
printf_filtered ("gdbsim_load: prog \"%s\"\n", prog);
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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;
}
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/* Start an inferior process and set inferior_ptid to its pid.
EXEC_FILE is the file to run.
ARGS 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
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gdbsim_create_inferior (char *exec_file, char *args, char **env)
{
int len;
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char *arg_buf, **argv;
if (exec_file == 0 || exec_bfd == 0)
warning ("No executable file specified.");
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if (!program_loaded)
warning ("No program loaded.");
if (sr_get_debug ())
printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n",
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(exec_file ? exec_file : "(NULL)"),
args);
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gdbsim_kill ();
remove_breakpoints ();
init_wait_for_inferior ();
if (exec_file != NULL)
{
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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);
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make_cleanup_freeargv (argv);
}
else
argv = NULL;
sim_create_inferior (gdbsim_desc, exec_bfd, argv, env);
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inferior_ptid = pid_to_ptid (42);
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insert_breakpoints (); /* Needed to get correct instruction in cache */
clear_proceed_status ();
/* NB: Entry point already set by sim_create_inferior. */
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proceed ((CORE_ADDR) -1, 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
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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);
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len = (7 + 1 /* gdbsim */
+ strlen (" -E little")
+ strlen (" --architecture=xxxxxxxxxx")
+ (args ? strlen (args) : 0)
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+ 50) /* slack */ ;
arg_buf = (char *) alloca (len);
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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). */
if (!TARGET_BYTE_ORDER_AUTO)
{
switch (TARGET_BYTE_ORDER)
{
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case BFD_ENDIAN_BIG:
strcat (arg_buf, " -E big");
break;
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case BFD_ENDIAN_LITTLE:
strcat (arg_buf, " -E little");
break;
default:
internal_error (__FILE__, __LINE__,
"Value of TARGET_BYTE_ORDER unknown");
}
}
/* 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)
{
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strcat (arg_buf, " "); /* 1 */
strcat (arg_buf, args);
}
argv = buildargv (arg_buf);
if (argv == NULL)
error ("Insufficient memory available to allocate simulator arg list.");
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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");
}
/* 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
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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 ();
}
/* 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
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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);
}
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/* 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 enum target_signal resume_siggnal;
static int resume_step;
static void
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gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal)
{
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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;
}
/* Notify the simulator of an asynchronous request to stop.
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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
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gdbsim_stop (void)
{
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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
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gdb_os_poll_quit (host_callback *p)
{
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if (ui_loop_hook != NULL)
ui_loop_hook (0);
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if (quit_flag) /* gdb's idea of quit */
{
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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. */
static void
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gdbsim_cntrl_c (int signo)
{
gdbsim_stop ();
}
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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,
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->kind = TARGET_WAITKIND_EXITED;
status->value.integer = sigrc;
break;
case sim_stopped:
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;
/* The signal in sigrc is a host signal. That probably
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should be fixed. */
status->value.sig = target_signal_from_host (sigrc);
break;
case sim_running:
case sim_polling:
/* FIXME: Is this correct? */
break;
}
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return inferior_ptid;
}
/* 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
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gdbsim_prepare_to_store (void)
{
/* Do nothing, since we can store individual regs */
}
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/* Transfer LEN bytes between GDB address MYADDR and target address
MEMADDR. If WRITE is non-zero, transfer them to the target,
otherwise transfer them from the target. TARGET is unused.
Returns the number of bytes transferred. */
static int
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gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len,
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int write, struct mem_attrib *attrib,
struct target_ops *target)
{
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if (!program_loaded)
error ("No program loaded.");
if (sr_get_debug ())
{
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/* 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)
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dump_mem (myaddr, len);
}
if (write)
{
len = sim_write (gdbsim_desc, memaddr, myaddr, len);
}
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else
{
len = sim_read (gdbsim_desc, memaddr, myaddr, len);
if (sr_get_debug () && len > 0)
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dump_mem (myaddr, len);
}
return len;
}
static void
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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);
}
}
/* Clear the simulator's notion of what the break points are. */
static void
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gdbsim_mourn_inferior (void)
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{
if (sr_get_debug ())
printf_filtered ("gdbsim_mourn_inferior:\n");
remove_breakpoints ();
generic_mourn_inferior ();
}
static int
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gdbsim_insert_breakpoint (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
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gdbsim_remove_breakpoint (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. */
void
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simulator_command (char *args, int from_tty)
{
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");
}
sim_do_command (gdbsim_desc, args);
/* Invalidate the register cache, in case the simulator command does
something funny. */
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registers_changed ();
}
/* Define the target subroutine names */
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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_post_attach = NULL;
gdbsim_ops.to_require_attach = NULL;
gdbsim_ops.to_detach = gdbsim_detach;
gdbsim_ops.to_require_detach = NULL;
gdbsim_ops.to_resume = gdbsim_resume;
gdbsim_ops.to_wait = gdbsim_wait;
gdbsim_ops.to_post_wait = NULL;
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_post_startup_inferior = NULL;
gdbsim_ops.to_acknowledge_created_inferior = NULL;
gdbsim_ops.to_clone_and_follow_inferior = NULL;
gdbsim_ops.to_post_follow_inferior_by_clone = NULL;
gdbsim_ops.to_insert_fork_catchpoint = NULL;
gdbsim_ops.to_remove_fork_catchpoint = NULL;
gdbsim_ops.to_insert_vfork_catchpoint = NULL;
gdbsim_ops.to_remove_vfork_catchpoint = NULL;
gdbsim_ops.to_has_forked = NULL;
gdbsim_ops.to_has_vforked = NULL;
gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL;
gdbsim_ops.to_post_follow_vfork = NULL;
gdbsim_ops.to_insert_exec_catchpoint = NULL;
gdbsim_ops.to_remove_exec_catchpoint = NULL;
gdbsim_ops.to_has_execd = NULL;
gdbsim_ops.to_reported_exec_events_per_exec_call = NULL;
gdbsim_ops.to_has_exited = NULL;
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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_pid_to_exec_file = NULL;
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
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_initialize_remote_sim (void)
{
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init_gdbsim_ops ();
add_target (&gdbsim_ops);
add_com ("sim <command>", class_obscure, simulator_command,
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"Send a command to the simulator.");
}