sim/frv/sim-if.c

   1 /* Main simulator entry points specific to the FRV.
   2    Copyright (C) 1998-2023 Free Software Foundation, Inc.
   3    Contributed by Red Hat.
   4
   5 This file is part of the GNU simulators.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include <stdlib.h>
  24
  25 #include "sim/callback.h"
  26
  27 #define WANT_CPU
  28 #define WANT_CPU_FRVBF
  29 #include "sim-main.h"
  30 #include "sim-options.h"
  31 #include "libiberty.h"
  32 #include "bfd.h"
  33 #include "elf-bfd.h"
  34
  35 static void free_state (SIM_DESC);
  36 \f
  37 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  38
  39 static void
  40 free_state (SIM_DESC sd)
  41 {
  42   if (STATE_MODULES (sd) != NULL)
  43     sim_module_uninstall (sd);
  44   sim_cpu_free_all (sd);
  45   sim_state_free (sd);
  46 }
  47
  48 extern const SIM_MACH * const frv_sim_machs[];
  49
  50 /* Create an instance of the simulator.  */
  51
  52 SIM_DESC
  53 sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
  54           char * const *argv)
  55 {
  56   char c;
  57   int i;
  58   unsigned long elf_flags = 0;
  59   SIM_DESC sd = sim_state_alloc (kind, callback);
  60
  61   /* Set default options before parsing user options.  */
  62   STATE_MACHS (sd) = frv_sim_machs;
  63   STATE_MODEL_NAME (sd) = "fr500";
  64   current_alignment = STRICT_ALIGNMENT;
  65   current_target_byte_order = BFD_ENDIAN_BIG;
  66
  67   /* The cpu data is kept in a separately allocated chunk of memory.  */
  68   if (sim_cpu_alloc_all_extra (sd, 0, sizeof (struct frv_sim_cpu)) != SIM_RC_OK)
  69     {
  70       free_state (sd);
  71       return 0;
  72     }
  73
  74   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  75     {
  76       free_state (sd);
  77       return 0;
  78     }
  79
  80   /* These options override any module options.
  81      Obviously ambiguity should be avoided, however the caller may wish to
  82      augment the meaning of an option.  */
  83   sim_add_option_table (sd, NULL, frv_options);
  84
  85   /* The parser will print an error message for us, so we silently return.  */
  86   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  87     {
  88       free_state (sd);
  89       return 0;
  90     }
  91
  92   /* Allocate core managed memory if none specified by user.
  93      Use address 4 here in case the user wanted address 0 unmapped.  */
  94   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  95     sim_do_commandf (sd, "memory region 0,0x%x", FRV_DEFAULT_MEM_SIZE);
  96
  97   /* check for/establish the reference program image */
  98   if (sim_analyze_program (sd, STATE_PROG_FILE (sd), abfd) != SIM_RC_OK)
  99     {
 100       free_state (sd);
 101       return 0;
 102     }
 103
 104   /* set machine and architecture correctly instead of defaulting to frv */
 105   {
 106     bfd *prog_bfd = STATE_PROG_BFD (sd);
 107     if (prog_bfd != NULL)
 108       {
 109         const struct elf_backend_data *backend_data;
 110
 111         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 112           {
 113             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 114                             STATE_MY_NAME (sd),
 115                             bfd_get_filename (prog_bfd));
 116             free_state (sd);
 117             return 0;
 118           }
 119
 120         backend_data = get_elf_backend_data (prog_bfd);
 121
 122         if (backend_data != NULL)
 123           backend_data->elf_backend_object_p (prog_bfd);
 124
 125         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 126       }
 127   }
 128
 129   /* Establish any remaining configuration options.  */
 130   if (sim_config (sd) != SIM_RC_OK)
 131     {
 132       free_state (sd);
 133       return 0;
 134     }
 135
 136   if (sim_post_argv_init (sd) != SIM_RC_OK)
 137     {
 138       free_state (sd);
 139       return 0;
 140     }
 141
 142   /* Open a copy of the cpu descriptor table.  */
 143   {
 144     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 145                                              CGEN_ENDIAN_BIG);
 146     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 147       {
 148         SIM_CPU *cpu = STATE_CPU (sd, i);
 149         CPU_CPU_DESC (cpu) = cd;
 150         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 151         CPU_ELF_FLAGS (cpu) = elf_flags;
 152       }
 153     frv_cgen_init_dis (cd);
 154   }
 155
 156   /* CPU specific initialization.  */
 157   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 158     {
 159       SIM_CPU* cpu = STATE_CPU (sd, i);
 160       frv_initialize (cpu, sd);
 161     }
 162
 163   return sd;
 164 }
 165
 166 void
 167 frv_sim_close (SIM_DESC sd, int quitting)
 168 {
 169   int i;
 170   /* Terminate cache support.  */
 171   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 172     {
 173       SIM_CPU* cpu = STATE_CPU (sd, i);
 174       frv_cache_term (CPU_INSN_CACHE (cpu));
 175       frv_cache_term (CPU_DATA_CACHE (cpu));
 176     }
 177 }
 178 \f
 179 SIM_RC
 180 sim_create_inferior (SIM_DESC sd, bfd *abfd, char * const *argv,
 181                      char * const *env)
 182 {
 183   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 184   host_callback *cb = STATE_CALLBACK (sd);
 185   bfd_vma addr;
 186
 187   if (abfd != NULL)
 188     addr = bfd_get_start_address (abfd);
 189   else
 190     addr = 0;
 191   sim_pc_set (current_cpu, addr);
 192
 193   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 194      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 195      with `gdb`), we need to handle it because the user can change the
 196      argv on the fly via gdb's 'run'.  */
 197   if (STATE_PROG_ARGV (sd) != argv)
 198     {
 199       freeargv (STATE_PROG_ARGV (sd));
 200       STATE_PROG_ARGV (sd) = dupargv (argv);
 201     }
 202
 203   if (STATE_PROG_ENVP (sd) != env)
 204     {
 205       freeargv (STATE_PROG_ENVP (sd));
 206       STATE_PROG_ENVP (sd) = dupargv (env);
 207     }
 208
 209   cb->argv = STATE_PROG_ARGV (sd);
 210   cb->envp = STATE_PROG_ENVP (sd);
 211
 212   return SIM_RC_OK;
 213 }