binutils-gdb/sim/ppc/sim_calls.c

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/* This file is part of the program psim.
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Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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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.
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 <signal.h> /* FIXME - should be machine dependant version */
#include <stdarg.h>
#include <ctype.h>
#include "psim.h"
#include "options.h"
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#undef printf_filtered /* blow away the mapping */
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
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#include "defs.h"
#include "bfd.h"
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#include "callback.h"
#include "remote-sim.h"
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/* Structures used by the simulator, for gdb just have static structures */
static psim *simulator;
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static device *root_device;
static const char *register_names[] = REGISTER_NAMES;
static host_callback *callbacks;
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SIM_DESC
sim_open (SIM_OPEN_KIND kind,
host_callback *callback,
struct _bfd *abfd,
char **argv)
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{
callbacks = callback;
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/* Note: The simulation is not created by sim_open() because
complete information is not yet available */
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/* trace the call */
TRACE(trace_gdb, ("sim_open called\n"));
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if (root_device != NULL)
sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
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root_device = psim_tree();
simulator = NULL;
psim_options(root_device, argv + 1);
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if (ppc_trace[trace_opts])
print_options ();
/* fudge our descriptor for now */
return (SIM_DESC) 1;
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}
void
sim_close (SIM_DESC sd, int quitting)
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{
TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
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if (ppc_trace[trace_print_info] && simulator != NULL)
psim_print_info (simulator, ppc_trace[trace_print_info]);
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}
SIM_RC
sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
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{
char **argv;
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TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
prog, from_tty));
ASSERT(prog != NULL);
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/* parse the arguments, assume that the file is argument 0 */
argv = buildargv(prog);
ASSERT(argv != NULL && argv[0] != NULL);
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/* create the simulator */
TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
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simulator = psim_create(argv[0], root_device);
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/* bring in all the data section */
psim_init(simulator);
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/* get the start address */
if (abfd == NULL)
{
abfd = bfd_openr (argv[0], 0);
if (abfd == NULL)
error ("psim: can't open \"%s\": %s\n",
argv[0], 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",
argv[0], errmsg);
}
bfd_close (abfd);
}
/* release the arguments */
freeargv(argv);
return SIM_RC_OK;
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}
int
sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
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{
int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
buf, mem, length);
TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
(long)mem, (long)buf, length, result));
return result;
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}
int
sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
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{
int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
buf, mem, length,
1/*violate_ro*/);
TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
(long)mem, (long)buf, length, result));
return result;
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}
void
sim_fetch_register (SIM_DESC sd, int regno, unsigned char *buf)
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{
if (simulator == NULL) {
return;
}
TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
regno, register_names[regno], (long)buf));
psim_read_register(simulator, MAX_NR_PROCESSORS,
buf, register_names[regno],
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raw_transfer);
}
void
sim_store_register (SIM_DESC sd, int regno, unsigned char *buf)
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{
if (simulator == NULL)
return;
TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
regno, register_names[regno], (long)buf));
psim_write_register(simulator, MAX_NR_PROCESSORS,
buf, register_names[regno],
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raw_transfer);
}
void
sim_info (SIM_DESC sd, int verbose)
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{
TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
psim_print_info (simulator, verbose);
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}
SIM_RC
sim_create_inferior (SIM_DESC sd,
struct _bfd *abfd,
char **argv,
char **envp)
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{
unsigned_word entry_point;
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TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
entry_point));
if (simulator == NULL)
error ("No program loaded");
if (abfd != NULL)
entry_point = bfd_get_start_address (abfd);
else
entry_point = 0xfff00000; /* ??? */
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psim_init(simulator);
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psim_stack(simulator, argv, envp);
psim_write_register(simulator, -1 /* all start at same PC */,
&entry_point, "pc", cooked_transfer);
return SIM_RC_OK;
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}
void
sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
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{
psim_status status = psim_get_status(simulator);
switch (status.reason) {
case was_continuing:
*reason = sim_stopped;
if (status.signal == 0)
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*sigrc = SIGTRAP;
else
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*sigrc = status.signal;
break;
case was_trap:
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*reason = sim_stopped;
*sigrc = SIGTRAP;
break;
case was_exited:
*reason = sim_exited;
*sigrc = status.signal;
break;
case was_signalled:
*reason = sim_signalled;
*sigrc = status.signal;
break;
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}
TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
(long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
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}
/* Run (or resume) the program. */
int
sim_stop (SIM_DESC sd)
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{
psim_stop (simulator);
return 1;
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}
void
sim_resume (SIM_DESC sd, int step, int siggnal)
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{
TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
step, siggnal));
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if (step)
{
psim_step (simulator);
}
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else
{
psim_run (simulator);
}
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}
void
sim_do_command (SIM_DESC sd, char *cmd)
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{
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TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
cmd ? cmd : "(null)"));
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if (cmd != NULL) {
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char **argv = buildargv(cmd);
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psim_command(root_device, argv);
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freeargv(argv);
}
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}
/* 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;
}
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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;
}
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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;
}
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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;
}
}
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/****/
void *
zalloc(long size)
{
void *memory = (void*)xmalloc(size);
if (memory == NULL)
error("xmalloc failed\n");
memset(memory, 0, size);
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return memory;
}
void zfree(void *data)
{
free(NULL, data);
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}