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- /* RISC-V simulator.
- Copyright (C) 2005-2022 Free Software Foundation, Inc.
- Contributed by Mike Frysinger.
- This file is part of simulators.
- 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/>. */
- /* This must come before any other includes. */
- #include "defs.h"
- #include "sim/callback.h"
- #include "sim-main.h"
- #include "sim-options.h"
- #include "target-newlib-syscall.h"
- void
- sim_engine_run (SIM_DESC sd,
- int next_cpu_nr, /* ignore */
- int nr_cpus, /* ignore */
- int siggnal) /* ignore */
- {
- SIM_CPU *cpu;
- SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
- cpu = STATE_CPU (sd, 0);
- while (1)
- {
- step_once (cpu);
- if (sim_events_tick (sd))
- sim_events_process (sd);
- }
- }
- static void
- free_state (SIM_DESC sd)
- {
- if (STATE_MODULES (sd) != NULL)
- sim_module_uninstall (sd);
- sim_cpu_free_all (sd);
- sim_state_free (sd);
- }
- extern const SIM_MACH * const riscv_sim_machs[];
- SIM_DESC
- sim_open (SIM_OPEN_KIND kind, host_callback *callback,
- struct bfd *abfd, char * const *argv)
- {
- char c;
- int i;
- SIM_DESC sd = sim_state_alloc_extra (kind, callback,
- sizeof (struct riscv_sim_state));
- /* Set default options before parsing user options. */
- STATE_MACHS (sd) = riscv_sim_machs;
- STATE_MODEL_NAME (sd) = WITH_TARGET_WORD_BITSIZE == 32 ? "RV32G" : "RV64G";
- current_target_byte_order = BFD_ENDIAN_LITTLE;
- callback->syscall_map = cb_riscv_syscall_map;
- /* The cpu data is kept in a separately allocated chunk of memory. */
- if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- /* XXX: Default to the Virtual environment. */
- if (STATE_ENVIRONMENT (sd) == ALL_ENVIRONMENT)
- STATE_ENVIRONMENT (sd) = VIRTUAL_ENVIRONMENT;
- /* The parser will print an error message for us, so we silently return. */
- if (sim_parse_args (sd, argv) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- /* Check for/establish the a reference program image. */
- if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- /* Establish any remaining configuration options. */
- if (sim_config (sd) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- if (sim_post_argv_init (sd) != SIM_RC_OK)
- {
- free_state (sd);
- return 0;
- }
- /* CPU specific initialization. */
- for (i = 0; i < MAX_NR_PROCESSORS; ++i)
- {
- SIM_CPU *cpu = STATE_CPU (sd, i);
- initialize_cpu (sd, cpu, i);
- }
- /* Allocate external memory if none specified by user.
- Use address 4 here in case the user wanted address 0 unmapped. */
- if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
- sim_do_commandf (sd, "memory-size %#x", DEFAULT_MEM_SIZE);
- return sd;
- }
- SIM_RC
- sim_create_inferior (SIM_DESC sd, struct bfd *abfd,
- char * const *argv, char * const *env)
- {
- SIM_CPU *cpu = STATE_CPU (sd, 0);
- host_callback *cb = STATE_CALLBACK (sd);
- SIM_ADDR addr;
- /* Set the PC. */
- if (abfd != NULL)
- addr = bfd_get_start_address (abfd);
- else
- addr = 0;
- sim_pc_set (cpu, addr);
- /* Standalone mode (i.e. `run`) will take care of the argv for us in
- sim_open() -> sim_parse_args(). But in debug mode (i.e. 'target sim'
- with `gdb`), we need to handle it because the user can change the
- argv on the fly via gdb's 'run'. */
- if (STATE_PROG_ARGV (sd) != argv)
- {
- freeargv (STATE_PROG_ARGV (sd));
- STATE_PROG_ARGV (sd) = dupargv (argv);
- }
- if (STATE_PROG_ENVP (sd) != env)
- {
- freeargv (STATE_PROG_ENVP (sd));
- STATE_PROG_ENVP (sd) = dupargv (env);
- }
- cb->argv = STATE_PROG_ARGV (sd);
- cb->envp = STATE_PROG_ENVP (sd);
- initialize_env (sd, (void *)argv, (void *)env);
- return SIM_RC_OK;
- }
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