sim/frv/sim-if.c

   1 /* Main simulator entry points specific to the FRV.
   2    Copyright (C) 1998-2021 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 #define WANT_CPU
  24 #define WANT_CPU_FRVBF
  25 #include "sim-main.h"
  26 #include <stdlib.h>
  27 #include "sim-options.h"
  28 #include "libiberty.h"
  29 #include "bfd.h"
  30 #include "elf-bfd.h"
  31
  32 static void free_state (SIM_DESC);
  33 \f
  34 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  35
  36 static void
  37 free_state (SIM_DESC sd)
  38 {
  39   if (STATE_MODULES (sd) != NULL)
  40     sim_module_uninstall (sd);
  41   sim_cpu_free_all (sd);
  42   sim_state_free (sd);
  43 }
  44
  45 extern const SIM_MACH * const frv_sim_machs[];
  46
  47 /* Create an instance of the simulator.  */
  48
  49 SIM_DESC
  50 sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
  51           char * const *argv)
  52 {
  53   char c;
  54   int i;
  55   unsigned long elf_flags = 0;
  56   SIM_DESC sd = sim_state_alloc (kind, callback);
  57
  58   /* Set default options before parsing user options.  */
  59   STATE_MACHS (sd) = frv_sim_machs;
  60   STATE_MODEL_NAME (sd) = "fr500";
  61   current_alignment = STRICT_ALIGNMENT;
  62   current_target_byte_order = BFD_ENDIAN_BIG;
  63
  64   /* The cpu data is kept in a separately allocated chunk of memory.  */
  65   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  66     {
  67       free_state (sd);
  68       return 0;
  69     }
  70
  71   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  72     {
  73       free_state (sd);
  74       return 0;
  75     }
  76
  77   /* These options override any module options.
  78      Obviously ambiguity should be avoided, however the caller may wish to
  79      augment the meaning of an option.  */
  80   sim_add_option_table (sd, NULL, frv_options);
  81
  82   /* The parser will print an error message for us, so we silently return.  */
  83   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  84     {
  85       free_state (sd);
  86       return 0;
  87     }
  88
  89   /* Allocate core managed memory if none specified by user.
  90      Use address 4 here in case the user wanted address 0 unmapped.  */
  91   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  92     sim_do_commandf (sd, "memory region 0,0x%x", FRV_DEFAULT_MEM_SIZE);
  93
  94   /* check for/establish the reference program image */
  95   if (sim_analyze_program (sd,
  96                            (STATE_PROG_ARGV (sd) != NULL
  97                             ? *STATE_PROG_ARGV (sd)
  98                             : NULL),
  99                            abfd) != SIM_RC_OK)
 100     {
 101       free_state (sd);
 102       return 0;
 103     }
 104
 105   /* set machine and architecture correctly instead of defaulting to frv */
 106   {
 107     bfd *prog_bfd = STATE_PROG_BFD (sd);
 108     if (prog_bfd != NULL)
 109       {
 110         const struct elf_backend_data *backend_data;
 111
 112         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 113           {
 114             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 115                             STATE_MY_NAME (sd),
 116                             bfd_get_filename (prog_bfd));
 117             free_state (sd);
 118             return 0;
 119           }
 120
 121         backend_data = get_elf_backend_data (prog_bfd);
 122
 123         if (backend_data != NULL)
 124           backend_data->elf_backend_object_p (prog_bfd);
 125
 126         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 127       }
 128   }
 129
 130   /* Establish any remaining configuration options.  */
 131   if (sim_config (sd) != SIM_RC_OK)
 132     {
 133       free_state (sd);
 134       return 0;
 135     }
 136
 137   if (sim_post_argv_init (sd) != SIM_RC_OK)
 138     {
 139       free_state (sd);
 140       return 0;
 141     }
 142
 143   /* Open a copy of the cpu descriptor table.  */
 144   {
 145     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 146                                              CGEN_ENDIAN_BIG);
 147     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 148       {
 149         SIM_CPU *cpu = STATE_CPU (sd, i);
 150         CPU_CPU_DESC (cpu) = cd;
 151         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 152         CPU_ELF_FLAGS (cpu) = elf_flags;
 153       }
 154     frv_cgen_init_dis (cd);
 155   }
 156
 157   /* CPU specific initialization.  */
 158   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 159     {
 160       SIM_CPU* cpu = STATE_CPU (sd, i);
 161       frv_initialize (cpu, sd);
 162     }
 163
 164   return sd;
 165 }
 166
 167 void
 168 frv_sim_close (SIM_DESC sd, int quitting)
 169 {
 170   int i;
 171   /* Terminate cache support.  */
 172   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 173     {
 174       SIM_CPU* cpu = STATE_CPU (sd, i);
 175       frv_cache_term (CPU_INSN_CACHE (cpu));
 176       frv_cache_term (CPU_DATA_CACHE (cpu));
 177     }
 178 }
 179 \f
 180 SIM_RC
 181 sim_create_inferior (SIM_DESC sd, bfd *abfd, char * const *argv,
 182                      char * const *envp)
 183 {
 184   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 185   SIM_ADDR 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   return SIM_RC_OK;
 204 }