/* This file is part of the program psim.
- Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+ Copyright (C) 1994-1996,1998, Andrew Cagney <cagney@highland.com.au>
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
#include "psim.h"
#include "options.h"
+#undef printf_filtered /* blow away the mapping */
+
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#endif
#endif
-#include "../../gdb/defs.h"
+#include "defs.h"
+#include "bfd.h"
+#include "callback.h"
+#include "remote-sim.h"
-#include "../../gdb/remote-sim.h"
-#include "../../gdb/callback.h"
+/* Define the rate at which the simulator should poll the host
+ for a quit. */
+#ifndef POLL_QUIT_INTERVAL
+#define POLL_QUIT_INTERVAL 0x20
+#endif
+static int poll_quit_count = POLL_QUIT_INTERVAL;
/* Structures used by the simulator, for gdb just have static structures */
static psim *simulator;
static device *root_device;
-static const char *register_names[] = REGISTER_NAMES;
-
-void
-sim_open (char *args)
+static host_callback *callbacks;
+
+/* We use GDB's reg_names array to map GDB register numbers onto
+ names, which we can then look up in the register table.
+
+ We used to just use the REGISTER_NAMES macro, from GDB's
+ target-dependent header files. That was kind of nice, because it
+ meant that libsim.a had only a compile-time dependency on GDB;
+ using reg_names directly means that there are now link-time and
+ run-time dependencies too.
+
+ However, the GDB PPC back-end now modifies the reg_names array when
+ the user runs the `set processor' command, which affects the
+ meanings of the register numbers. So the sim needs to see the
+ register names GDB is actually using.
+
+ Perhaps the host_callback structure could contain a pointer to the
+ register name table; that would be cleaner. */
+
+SIM_DESC
+sim_open (SIM_OPEN_KIND kind,
+ host_callback *callback,
+ struct _bfd *abfd,
+ char **argv)
{
+ callbacks = callback;
+
/* Note: The simulation is not created by sim_open() because
complete information is not yet available */
/* trace the call */
- TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)"));
+ TRACE(trace_gdb, ("sim_open called\n"));
if (root_device != NULL)
- printf_filtered("Warning - re-open of simulator leaks memory\n");
+ sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
root_device = psim_tree();
simulator = NULL;
- if (args) {
- char **argv = buildargv(args);
- psim_options(root_device, argv);
- freeargv(argv);
- }
+ psim_options(root_device, argv + 1);
if (ppc_trace[trace_opts])
print_options ();
+
+ /* fudge our descriptor for now */
+ return (SIM_DESC) 1;
}
void
-sim_close (int quitting)
+sim_close (SIM_DESC sd, int quitting)
{
TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
if (ppc_trace[trace_print_info] && simulator != NULL)
}
-int
-sim_load (char *prog, int from_tty)
+SIM_RC
+sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
{
- char **argv;
TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
prog, from_tty));
ASSERT(prog != NULL);
- /* parse the arguments, assume that the file is argument 0 */
- argv = buildargv(prog);
- ASSERT(argv != NULL && argv[0] != NULL);
-
/* create the simulator */
TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
- simulator = psim_create(argv[0], root_device);
+ simulator = psim_create(prog, root_device);
/* bring in all the data section */
psim_init(simulator);
- /* release the arguments */
- freeargv(argv);
-
- /* `I did it my way' */
- return 0;
-}
-
+ /* get the start address */
+ if (abfd == NULL)
+ {
+ abfd = bfd_openr (prog, 0);
+ if (abfd == NULL)
+ error ("psim: can't open \"%s\": %s\n",
+ prog, bfd_errmsg (bfd_get_error ()));
+ if (!bfd_check_format (abfd, bfd_object))
+ {
+ const char *errmsg = bfd_errmsg (bfd_get_error ());
+ bfd_close (abfd);
+ error ("psim: \"%s\" is not an object file: %s\n",
+ prog, errmsg);
+ }
+ bfd_close (abfd);
+ }
-void
-sim_kill (void)
-{
- TRACE(trace_gdb, ("sim_kill(void) called\n"));
- /* do nothing, nothing to do */
+ return SIM_RC_OK;
}
int
-sim_read (SIM_ADDR mem, unsigned char *buf, int length)
+sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
{
int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
buf, mem, length);
int
-sim_write (SIM_ADDR mem, unsigned char *buf, int length)
+sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
{
int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
buf, mem, length,
}
-void
-sim_fetch_register (int regno, unsigned char *buf)
+int
+sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf, int length)
{
+ char *regname;
+
if (simulator == NULL) {
- return;
+ return 0;
}
+
+ /* GDB will sometimes ask for the contents of a register named "";
+ we ignore such requests, and leave garbage in *BUF. In
+ REG_NAMES, the empty string means "the register with this
+ number is not present in the currently selected architecture
+ variant." That's following the kludge we're using for the MIPS
+ processors. But there are loops that just walk through the
+ entire list of names and try to get everything. */
+ regname = REGISTER_NAME (regno);
+ if (! regname || regname[0] == '\0')
+ return -1;
+
TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
- regno, register_names[regno], (long)buf));
+ regno, regname, (long)buf));
psim_read_register(simulator, MAX_NR_PROCESSORS,
- buf, register_names[regno],
- raw_transfer);
+ buf, regname, raw_transfer);
+ return -1;
}
-void
-sim_store_register (int regno, unsigned char *buf)
+int
+sim_store_register (SIM_DESC sd, int regno, unsigned char *buf, int length)
{
+ char *regname;
+
if (simulator == NULL)
- return;
+ return 0;
+
+ /* See comments in sim_fetch_register, above. */
+ regname = REGISTER_NAME (regno);
+ if (! regname || regname[0] == '\0')
+ return -1;
+
TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
- regno, register_names[regno], (long)buf));
+ regno, regname, (long)buf));
psim_write_register(simulator, MAX_NR_PROCESSORS,
- buf, register_names[regno],
- raw_transfer);
+ buf, regname, raw_transfer);
+ return -1;
}
void
-sim_info (int verbose)
+sim_info (SIM_DESC sd, int verbose)
{
TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
psim_print_info (simulator, verbose);
}
-void
-sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
+SIM_RC
+sim_create_inferior (SIM_DESC sd,
+ struct _bfd *abfd,
+ char **argv,
+ char **envp)
{
- unsigned_word entry_point = start_address;
-
+ unsigned_word entry_point;
TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
- start_address));
+ entry_point));
+
+ if (simulator == NULL)
+ error ("No program loaded");
+
+ if (abfd != NULL)
+ entry_point = bfd_get_start_address (abfd);
+ else
+ entry_point = 0xfff00000; /* ??? */
psim_init(simulator);
psim_stack(simulator, argv, envp);
psim_write_register(simulator, -1 /* all start at same PC */,
&entry_point, "pc", cooked_transfer);
+ return SIM_RC_OK;
}
-static volatile int sim_should_run;
-
void
-sim_stop_reason (enum sim_stop *reason, int *sigrc)
+sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
{
psim_status status = psim_get_status(simulator);
- switch (CURRENT_ENVIRONMENT) {
-
- case USER_ENVIRONMENT:
- case VIRTUAL_ENVIRONMENT:
- switch (status.reason) {
- case was_continuing:
- *reason = sim_stopped;
- *sigrc = SIGTRAP;
- if (sim_should_run) {
- error("sim_stop_reason() unknown reason for halt\n");
- }
- break;
- case was_trap:
- *reason = sim_stopped;
+ switch (status.reason) {
+ case was_continuing:
+ *reason = sim_stopped;
+ if (status.signal == 0)
*sigrc = SIGTRAP;
- break;
- case was_exited:
- *reason = sim_exited;
- *sigrc = 0;
- break;
- case was_signalled:
- *reason = sim_signalled;
+ else
*sigrc = status.signal;
- break;
- }
break;
-
- case OPERATING_ENVIRONMENT:
+ case was_trap:
*reason = sim_stopped;
*sigrc = SIGTRAP;
break;
-
- default:
- error("sim_stop_reason() - unknown environment\n");
-
+ case was_exited:
+ *reason = sim_exited;
+ *sigrc = status.signal;
+ break;
+ case was_signalled:
+ *reason = sim_signalled;
+ *sigrc = status.signal;
+ break;
}
TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
/* Run (or resume) the program. */
-static void
-sim_ctrl_c()
+
+int
+sim_stop (SIM_DESC sd)
{
- sim_should_run = 0;
+ psim_stop (simulator);
+ return 1;
}
void
-sim_resume (int step, int siggnal)
+sim_resume (SIM_DESC sd, int step, int siggnal)
{
- void (*prev) ();
-
TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
step, siggnal));
- prev = signal(SIGINT, sim_ctrl_c);
- sim_should_run = 1;
-
if (step)
- psim_step(simulator);
+ {
+ psim_step (simulator);
+ }
else
- psim_run_until_stop(simulator, &sim_should_run);
-
- signal(SIGINT, prev);
+ {
+ psim_run (simulator);
+ }
}
void
-sim_do_command (char *cmd)
+sim_do_command (SIM_DESC sd, char *cmd)
{
TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
cmd ? cmd : "(null)"));
- if (cmd) {
+ if (cmd != NULL) {
char **argv = buildargv(cmd);
- psim_options(root_device, argv);
+ psim_command(root_device, argv);
freeargv(argv);
}
}
+
+/* Polling, if required */
+
void
-sim_set_callbacks (host_callback *callback)
+sim_io_poll_quit (void)
{
- TRACE(trace_gdb, ("sim_set_callbacks called\n"));
+ if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
+ {
+ poll_quit_count = POLL_QUIT_INTERVAL;
+ if (callbacks->poll_quit (callbacks))
+ psim_stop (simulator);
+ }
+}
+
+
+
+/* Map simulator IO operations onto the corresponding GDB I/O
+ functions.
+
+ NB: Only a limited subset of operations are mapped across. More
+ advanced operations (such as dup or write) must either be mapped to
+ one of the below calls or handled internally */
+
+int
+sim_io_read_stdin(char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ return callbacks->read_stdin(callbacks, buf, sizeof_buf);
+ break;
+ case DONT_USE_STDIO:
+ return callbacks->read(callbacks, 0, buf, sizeof_buf);
+ break;
+ default:
+ error("sim_io_read_stdin: unaccounted switch\n");
+ break;
+ }
+ return 0;
+}
+
+int
+sim_io_write_stdout(const char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ return callbacks->write_stdout(callbacks, buf, sizeof_buf);
+ break;
+ case DONT_USE_STDIO:
+ return callbacks->write(callbacks, 1, buf, sizeof_buf);
+ break;
+ default:
+ error("sim_io_write_stdout: unaccounted switch\n");
+ break;
+ }
+ return 0;
+}
+
+int
+sim_io_write_stderr(const char *buf,
+ int sizeof_buf)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ /* NB: I think there should be an explicit write_stderr callback */
+ return callbacks->write(callbacks, 3, buf, sizeof_buf);
+ break;
+ case DONT_USE_STDIO:
+ return callbacks->write(callbacks, 3, buf, sizeof_buf);
+ break;
+ default:
+ error("sim_io_write_stderr: unaccounted switch\n");
+ break;
+ }
+ return 0;
+}
+
+
+void
+sim_io_printf_filtered(const char *fmt,
+ ...)
+{
+ char message[1024];
+ va_list ap;
+ /* format the message */
+ va_start(ap, fmt);
+ vsprintf(message, fmt, ap);
+ va_end(ap);
+ /* sanity check */
+ if (strlen(message) >= sizeof(message))
+ error("sim_io_printf_filtered: buffer overflow\n");
+ callbacks->printf_filtered(callbacks, "%s", message);
+}
+
+void
+sim_io_flush_stdoutput(void)
+{
+ switch (CURRENT_STDIO) {
+ case DO_USE_STDIO:
+ callbacks->flush_stdout (callbacks);
+ break;
+ case DONT_USE_STDIO:
+ break;
+ default:
+ error("sim_io_read_stdin: unaccounted switch\n");
+ break;
+ }
}
/****/
void zfree(void *data)
{
- mfree(NULL, data);
-}
-
-void flush_stdoutput(void)
-{
- gdb_flush (gdb_stdout);
+ free(data);
}
projects / deliverable / binutils-gdb.git / blobdiff