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/* Model support.
Copyright (C) 1996-2019 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB, the GNU debugger.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "sim-main.h"
#include "sim-model.h"
#include "libiberty.h"
#include "sim-options.h"
#include "sim-io.h"
#include "sim-assert.h"
#include "bfd.h"
static void model_set (sim_cpu *, const SIM_MODEL *);
static DECLARE_OPTION_HANDLER (model_option_handler);
static MODULE_INIT_FN sim_model_init;
enum {
OPTION_MODEL = OPTION_START,
OPTION_MODEL_INFO,
};
static const OPTION model_options[] = {
{ {"model", required_argument, NULL, OPTION_MODEL},
'\0', "MODEL", "Specify model to simulate",
model_option_handler, NULL },
{ {"model-info", no_argument, NULL, OPTION_MODEL_INFO},
'\0', NULL, "List selectable models",
model_option_handler, NULL },
{ {"info-model", no_argument, NULL, OPTION_MODEL_INFO},
'\0', NULL, NULL,
model_option_handler, NULL },
{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
};
static SIM_RC
model_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
char *arg, int is_command)
{
switch (opt)
{
case OPTION_MODEL :
{
const SIM_MODEL *model = sim_model_lookup (arg);
if (! model)
{
sim_io_eprintf (sd, "unknown model `%s'\n", arg);
return SIM_RC_FAIL;
}
sim_model_set (sd, cpu, model);
break;
}
case OPTION_MODEL_INFO :
{
const SIM_MACH **machp;
const SIM_MODEL *model;
for (machp = & sim_machs[0]; *machp != NULL; ++machp)
{
sim_io_printf (sd, "Models for architecture `%s':\n",
MACH_NAME (*machp));
for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL;
++model)
sim_io_printf (sd, " %s", MODEL_NAME (model));
sim_io_printf (sd, "\n");
}
break;
}
}
return SIM_RC_OK;
}
SIM_RC
sim_model_install (SIM_DESC sd)
{
SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
sim_add_option_table (sd, NULL, model_options);
sim_module_add_init_fn (sd, sim_model_init);
return SIM_RC_OK;
}
/* Subroutine of sim_model_set to set the model for one cpu. */
static void
model_set (sim_cpu *cpu, const SIM_MODEL *model)
{
CPU_MACH (cpu) = MODEL_MACH (model);
CPU_MODEL (cpu) = model;
(* MACH_INIT_CPU (MODEL_MACH (model))) (cpu);
(* MODEL_INIT (model)) (cpu);
}
/* Set the current model of CPU to MODEL.
If CPU is NULL, all cpus are set to MODEL. */
void
sim_model_set (SIM_DESC sd, sim_cpu *cpu, const SIM_MODEL *model)
{
if (! cpu)
{
int c;
for (c = 0; c < MAX_NR_PROCESSORS; ++c)
if (STATE_CPU (sd, c))
model_set (STATE_CPU (sd, c), model);
}
else
{
model_set (cpu, model);
}
}
/* Look up model named NAME.
Result is pointer to MODEL entry or NULL if not found. */
const SIM_MODEL *
sim_model_lookup (const char *name)
{
const SIM_MACH **machp;
const SIM_MODEL *model;
for (machp = & sim_machs[0]; *machp != NULL; ++machp)
{
for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL; ++model)
{
if (strcmp (MODEL_NAME (model), name) == 0)
return model;
}
}
return NULL;
}
/* Look up machine named NAME.
Result is pointer to MACH entry or NULL if not found. */
const SIM_MACH *
sim_mach_lookup (const char *name)
{
const SIM_MACH **machp;
for (machp = & sim_machs[0]; *machp != NULL; ++machp)
{
if (strcmp (MACH_NAME (*machp), name) == 0)
return *machp;
}
return NULL;
}
/* Look up a machine via its bfd name.
Result is pointer to MACH entry or NULL if not found. */
const SIM_MACH *
sim_mach_lookup_bfd_name (const char *name)
{
const SIM_MACH **machp;
for (machp = & sim_machs[0]; *machp != NULL; ++machp)
{
if (strcmp (MACH_BFD_NAME (*machp), name) == 0)
return *machp;
}
return NULL;
}
/* Initialize model support. */
static SIM_RC
sim_model_init (SIM_DESC sd)
{
SIM_CPU *cpu;
if (!WITH_MODEL_P)
return SIM_RC_OK;
/* If both cpu model and state architecture are set, ensure they're
compatible. If only one is set, set the other. If neither are set,
use the default model. STATE_ARCHITECTURE is the bfd_arch_info data
for the selected "mach" (bfd terminology). */
/* Only check cpu 0. STATE_ARCHITECTURE is for that one only. */
/* ??? At present this only supports homogeneous multiprocessors. */
cpu = STATE_CPU (sd, 0);
if (! STATE_ARCHITECTURE (sd)
&& ! CPU_MACH (cpu))
{
/* Set the default model. */
const SIM_MODEL *model = sim_model_lookup (WITH_DEFAULT_MODEL);
SIM_ASSERT (model != NULL);
sim_model_set (sd, NULL, model);
}
if (STATE_ARCHITECTURE (sd)
&& CPU_MACH (cpu))
{
if (strcmp (STATE_ARCHITECTURE (sd)->printable_name,
MACH_BFD_NAME (CPU_MACH (cpu))) != 0)
{
sim_io_eprintf (sd, "invalid model `%s' for `%s'\n",
MODEL_NAME (CPU_MODEL (cpu)),
STATE_ARCHITECTURE (sd)->printable_name);
return SIM_RC_FAIL;
}
}
else if (STATE_ARCHITECTURE (sd))
{
/* Use the default model for the selected machine.
The default model is the first one in the list. */
const SIM_MACH *mach = sim_mach_lookup_bfd_name (STATE_ARCHITECTURE (sd)->printable_name);
if (mach == NULL)
{
sim_io_eprintf (sd, "unsupported machine `%s'\n",
STATE_ARCHITECTURE (sd)->printable_name);
return SIM_RC_FAIL;
}
sim_model_set (sd, NULL, MACH_MODELS (mach));
}
else
{
STATE_ARCHITECTURE (sd) = bfd_scan_arch (MACH_BFD_NAME (CPU_MACH (cpu)));
}
return SIM_RC_OK;
}
#if !WITH_MODEL_P
/* Set up basic model support. This is a stub for ports that do not define
models. See sim-model.h for more details. */
const SIM_MACH *sim_machs[] =
{
NULL
};
#endif
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