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/* gdb->simulator interface.
Copyright (C) 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
This file is part of Z8KSIM
Z8KSIM 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, or (at your option)
any later version.
Z8KSIM 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 Z8KZIM; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "ansidecl.h"
#include "sim.h"
#include "tm.h"
#include "signal.h"
#include "bfd.h"
#include "gdb/callback.h"
#include "gdb/remote-sim.h"
#ifndef NULL
#define NULL 0
#endif
host_callback *z8k_callback;
static SIM_OPEN_KIND sim_kind;
static char *myname;
void
sim_size (n)
int n;
{
/* Size is fixed. */
}
int
sim_store_register (sd, regno, value, length)
SIM_DESC sd;
int regno;
unsigned char *value;
int length;
{
/* FIXME: Review the computation of regval. */
int regval = (value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3];
tm_store_register (regno, regval);
return -1;
}
int
sim_fetch_register (sd, regno, buf, length)
SIM_DESC sd;
int regno;
unsigned char *buf;
int length;
{
tm_fetch_register (regno, buf);
return -1;
}
int
sim_write (sd, where, what, howmuch)
SIM_DESC sd;
SIM_ADDR where;
unsigned char *what;
int howmuch;
{
int i;
for (i = 0; i < howmuch; i++)
tm_write_byte (where + i, what[i]);
return howmuch;
}
int
sim_read (sd, where, what, howmuch)
SIM_DESC sd;
SIM_ADDR where;
unsigned char *what;
int howmuch;
{
int i;
for (i = 0; i < howmuch; i++)
what[i] = tm_read_byte (where + i);
return howmuch;
}
static void
control_c (sig, code, scp, addr)
int sig;
int code;
char *scp;
char *addr;
{
tm_exception (SIM_INTERRUPT);
}
int
sim_stop (sd)
SIM_DESC sd;
{
tm_exception (SIM_INTERRUPT);
return 1;
}
void
sim_resume (sd, step, sig)
SIM_DESC sd;
int step;
int sig;
{
void (*prev) ();
prev = signal (SIGINT, control_c);
tm_resume (step);
signal (SIGINT, prev);
}
void
sim_stop_reason (sd, reason, sigrc)
SIM_DESC sd;
enum sim_stop *reason;
int *sigrc;
{
switch (tm_signal ())
{
case SIM_DIV_ZERO:
*sigrc = SIGFPE;
break;
case SIM_INTERRUPT:
*sigrc = SIGINT;
break;
case SIM_BAD_INST:
*sigrc = SIGILL;
break;
case SIM_BREAKPOINT:
*sigrc = SIGTRAP;
break;
case SIM_SINGLE_STEP:
*sigrc = SIGTRAP;
break;
case SIM_BAD_SYSCALL:
*sigrc = SIGILL;
break;
case SIM_BAD_ALIGN:
*sigrc = SIGSEGV;
break;
case SIM_DONE:
{
sim_state_type x;
tm_state (&x);
*sigrc = x.regs[2].word & 255;
*reason = sim_exited;
return;
}
default:
abort ();
}
*reason = sim_stopped;
}
void
sim_info (sd, verbose)
SIM_DESC sd;
int verbose;
{
sim_state_type x;
tm_state (&x);
tm_info_print (&x);
}
SIM_DESC
sim_open (kind, cb, abfd, argv)
SIM_OPEN_KIND kind;
host_callback *cb;
struct bfd *abfd;
char **argv;
{
/* FIXME: The code in sim_load that determines the exact z8k arch
should be moved to here */
sim_kind = kind;
myname = argv[0];
z8k_callback = cb;
/* fudge our descriptor for now */
return (SIM_DESC) 1;
}
void
sim_close (sd, quitting)
SIM_DESC sd;
int quitting;
{
/* nothing to do */
}
SIM_RC
sim_load (sd, prog, abfd, from_tty)
SIM_DESC sd;
char *prog;
bfd *abfd;
int from_tty;
{
extern bfd *sim_load_file (); /* ??? Don't know where this should live. */
bfd *prog_bfd;
/* FIXME: The code determining the type of z9k processor should be
moved from here to sim_open. */
prog_bfd = sim_load_file (sd, myname, z8k_callback, prog, abfd,
sim_kind == SIM_OPEN_DEBUG,
0, sim_write);
if (prog_bfd == NULL)
return SIM_RC_FAIL;
if (bfd_get_mach (prog_bfd) == bfd_mach_z8001)
{
extern int sim_z8001_mode;
sim_z8001_mode = 1;
}
/* Close the bfd if we opened it. */
if (abfd == NULL)
bfd_close (prog_bfd);
return SIM_RC_OK;
}
SIM_RC
sim_create_inferior (sd, abfd, argv, env)
SIM_DESC sd;
struct bfd *abfd;
char **argv;
char **env;
{
if (abfd != NULL)
tm_store_register (REG_PC, bfd_get_start_address (abfd));
else
tm_store_register (REG_PC, 0);
return SIM_RC_OK;
}
void
sim_do_command (sd, cmd)
SIM_DESC sd;
char *cmd;
{
}
void
sim_set_callbacks (ptr)
host_callback *ptr;
{
z8k_callback = ptr;
}
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