0d58595077
Rather than include this for some targets, set it up so we can build it all the time via the common code. This makes it easier for targets to opt into it when they're ready, increases build coverage, and allows us to centralize much of the logic. We also get to delete tconfig.h from two more targets -- they were setting WITH_DEVICES to 0 which has the same behavior as not defining it at all. While the SIM_HAVE_MODEL knob is gone, we now have WITH_MODEL_P, but it is only used by the common sim-model code. We use it to declare dummy model lists when the arch hasn't created its own.
256 lines
6.2 KiB
C
256 lines
6.2 KiB
C
/* Model support.
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Copyright (C) 1996-2015 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "sim-main.h"
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#include "sim-model.h"
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#include "libiberty.h"
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#include "sim-options.h"
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#include "sim-io.h"
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#include "sim-assert.h"
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#include "bfd.h"
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static void model_set (sim_cpu *, const SIM_MODEL *);
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static DECLARE_OPTION_HANDLER (model_option_handler);
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static MODULE_INIT_FN sim_model_init;
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enum {
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OPTION_MODEL = OPTION_START,
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OPTION_MODEL_INFO,
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};
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static const OPTION model_options[] = {
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{ {"model", required_argument, NULL, OPTION_MODEL},
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'\0', "MODEL", "Specify model to simulate",
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model_option_handler, NULL },
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{ {"model-info", no_argument, NULL, OPTION_MODEL_INFO},
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'\0', NULL, "List selectable models",
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model_option_handler, NULL },
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{ {"info-model", no_argument, NULL, OPTION_MODEL_INFO},
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'\0', NULL, NULL,
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model_option_handler, NULL },
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{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL }
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};
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static SIM_RC
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model_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt,
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char *arg, int is_command)
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{
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switch (opt)
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{
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case OPTION_MODEL :
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{
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const SIM_MODEL *model = sim_model_lookup (arg);
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if (! model)
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{
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sim_io_eprintf (sd, "unknown model `%s'\n", arg);
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return SIM_RC_FAIL;
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}
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sim_model_set (sd, cpu, model);
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break;
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}
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case OPTION_MODEL_INFO :
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{
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const SIM_MACH **machp;
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const SIM_MODEL *model;
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for (machp = & sim_machs[0]; *machp != NULL; ++machp)
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{
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sim_io_printf (sd, "Models for architecture `%s':\n",
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MACH_NAME (*machp));
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for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL;
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++model)
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sim_io_printf (sd, " %s", MODEL_NAME (model));
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sim_io_printf (sd, "\n");
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}
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break;
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}
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}
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return SIM_RC_OK;
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}
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SIM_RC
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sim_model_install (SIM_DESC sd)
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{
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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sim_add_option_table (sd, NULL, model_options);
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sim_module_add_init_fn (sd, sim_model_init);
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return SIM_RC_OK;
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}
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/* Subroutine of sim_model_set to set the model for one cpu. */
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static void
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model_set (sim_cpu *cpu, const SIM_MODEL *model)
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{
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CPU_MACH (cpu) = MODEL_MACH (model);
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CPU_MODEL (cpu) = model;
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(* MACH_INIT_CPU (MODEL_MACH (model))) (cpu);
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(* MODEL_INIT (model)) (cpu);
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}
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/* Set the current model of CPU to MODEL.
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If CPU is NULL, all cpus are set to MODEL. */
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void
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sim_model_set (SIM_DESC sd, sim_cpu *cpu, const SIM_MODEL *model)
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{
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if (! cpu)
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{
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int c;
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for (c = 0; c < MAX_NR_PROCESSORS; ++c)
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if (STATE_CPU (sd, c))
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model_set (STATE_CPU (sd, c), model);
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}
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else
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{
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model_set (cpu, model);
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}
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}
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/* Look up model named NAME.
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Result is pointer to MODEL entry or NULL if not found. */
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const SIM_MODEL *
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sim_model_lookup (const char *name)
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{
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const SIM_MACH **machp;
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const SIM_MODEL *model;
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for (machp = & sim_machs[0]; *machp != NULL; ++machp)
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{
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for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL; ++model)
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{
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if (strcmp (MODEL_NAME (model), name) == 0)
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return model;
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}
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}
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return NULL;
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}
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/* Look up machine named NAME.
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Result is pointer to MACH entry or NULL if not found. */
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const SIM_MACH *
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sim_mach_lookup (const char *name)
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{
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const SIM_MACH **machp;
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for (machp = & sim_machs[0]; *machp != NULL; ++machp)
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{
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if (strcmp (MACH_NAME (*machp), name) == 0)
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return *machp;
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}
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return NULL;
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}
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/* Look up a machine via its bfd name.
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Result is pointer to MACH entry or NULL if not found. */
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const SIM_MACH *
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sim_mach_lookup_bfd_name (const char *name)
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{
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const SIM_MACH **machp;
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for (machp = & sim_machs[0]; *machp != NULL; ++machp)
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{
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if (strcmp (MACH_BFD_NAME (*machp), name) == 0)
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return *machp;
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}
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return NULL;
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}
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/* Initialize model support. */
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static SIM_RC
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sim_model_init (SIM_DESC sd)
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{
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SIM_CPU *cpu;
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if (!WITH_MODEL_P)
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return SIM_RC_OK;
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/* If both cpu model and state architecture are set, ensure they're
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compatible. If only one is set, set the other. If neither are set,
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use the default model. STATE_ARCHITECTURE is the bfd_arch_info data
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for the selected "mach" (bfd terminology). */
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/* Only check cpu 0. STATE_ARCHITECTURE is for that one only. */
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/* ??? At present this only supports homogeneous multiprocessors. */
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cpu = STATE_CPU (sd, 0);
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if (! STATE_ARCHITECTURE (sd)
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&& ! CPU_MACH (cpu))
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{
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/* Set the default model. */
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const SIM_MODEL *model = sim_model_lookup (WITH_DEFAULT_MODEL);
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SIM_ASSERT (model != NULL);
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sim_model_set (sd, NULL, model);
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}
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if (STATE_ARCHITECTURE (sd)
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&& CPU_MACH (cpu))
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{
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if (strcmp (STATE_ARCHITECTURE (sd)->printable_name,
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MACH_BFD_NAME (CPU_MACH (cpu))) != 0)
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{
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sim_io_eprintf (sd, "invalid model `%s' for `%s'\n",
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MODEL_NAME (CPU_MODEL (cpu)),
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STATE_ARCHITECTURE (sd)->printable_name);
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return SIM_RC_FAIL;
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}
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}
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else if (STATE_ARCHITECTURE (sd))
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{
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/* Use the default model for the selected machine.
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The default model is the first one in the list. */
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const SIM_MACH *mach = sim_mach_lookup_bfd_name (STATE_ARCHITECTURE (sd)->printable_name);
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if (mach == NULL)
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{
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sim_io_eprintf (sd, "unsupported machine `%s'\n",
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STATE_ARCHITECTURE (sd)->printable_name);
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return SIM_RC_FAIL;
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}
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sim_model_set (sd, NULL, MACH_MODELS (mach));
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}
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else
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{
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STATE_ARCHITECTURE (sd) = bfd_scan_arch (MACH_BFD_NAME (CPU_MACH (cpu)));
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}
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return SIM_RC_OK;
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}
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#if !WITH_MODEL_P
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/* Set up basic model support. This is a stub for ports that do not define
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models. See sim-model.h for more details. */
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const SIM_MACH *sim_machs[] =
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{
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NULL
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};
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#endif
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