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 static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
  34 \f
  35 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  36
  37 static void
  38 free_state (SIM_DESC sd)
  39 {
  40   if (STATE_MODULES (sd) != NULL)
  41     sim_module_uninstall (sd);
  42   sim_cpu_free_all (sd);
  43   sim_state_free (sd);
  44 }
  45
  46 /* Create an instance of the simulator.  */
  47
  48 SIM_DESC
  49 sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
  50           char * const *argv)
  51 {
  52   char c;
  53   int i;
  54   unsigned long elf_flags = 0;
  55   SIM_DESC sd = sim_state_alloc (kind, callback);
  56
  57   /* Set default options before parsing user options.  */
  58   current_alignment = STRICT_ALIGNMENT;
  59   current_target_byte_order = BFD_ENDIAN_BIG;
  60
  61   /* The cpu data is kept in a separately allocated chunk of memory.  */
  62   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  63     {
  64       free_state (sd);
  65       return 0;
  66     }
  67
  68   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  69     {
  70       free_state (sd);
  71       return 0;
  72     }
  73
  74   /* These options override any module options.
  75      Obviously ambiguity should be avoided, however the caller may wish to
  76      augment the meaning of an option.  */
  77   sim_add_option_table (sd, NULL, frv_options);
  78
  79   /* The parser will print an error message for us, so we silently return.  */
  80   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  81     {
  82       free_state (sd);
  83       return 0;
  84     }
  85
  86   /* Allocate core managed memory if none specified by user.
  87      Use address 4 here in case the user wanted address 0 unmapped.  */
  88   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  89     sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
  90
  91   /* check for/establish the reference program image */
  92   if (sim_analyze_program (sd,
  93                            (STATE_PROG_ARGV (sd) != NULL
  94                             ? *STATE_PROG_ARGV (sd)
  95                             : NULL),
  96                            abfd) != SIM_RC_OK)
  97     {
  98       free_state (sd);
  99       return 0;
 100     }
 101
 102   /* set machine and architecture correctly instead of defaulting to frv */
 103   {
 104     bfd *prog_bfd = STATE_PROG_BFD (sd);
 105     if (prog_bfd != NULL)
 106       {
 107         struct elf_backend_data *backend_data;
 108
 109         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 110           {
 111             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 112                             STATE_MY_NAME (sd),
 113                             bfd_get_filename (prog_bfd));
 114             free_state (sd);
 115             return 0;
 116           }
 117
 118         backend_data = get_elf_backend_data (prog_bfd);
 119
 120         if (backend_data != NULL)
 121           backend_data->elf_backend_object_p (prog_bfd);
 122
 123         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 124       }
 125   }
 126
 127   /* Establish any remaining configuration options.  */
 128   if (sim_config (sd) != SIM_RC_OK)
 129     {
 130       free_state (sd);
 131       return 0;
 132     }
 133
 134   if (sim_post_argv_init (sd) != SIM_RC_OK)
 135     {
 136       free_state (sd);
 137       return 0;
 138     }
 139
 140   /* Open a copy of the cpu descriptor table.  */
 141   {
 142     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 143                                              CGEN_ENDIAN_BIG);
 144     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 145       {
 146         SIM_CPU *cpu = STATE_CPU (sd, i);
 147         CPU_CPU_DESC (cpu) = cd;
 148         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 149         CPU_ELF_FLAGS (cpu) = elf_flags;
 150       }
 151     frv_cgen_init_dis (cd);
 152   }
 153
 154   /* CPU specific initialization.  */
 155   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 156     {
 157       SIM_CPU* cpu = STATE_CPU (sd, i);
 158       frv_initialize (cpu, sd);
 159     }
 160
 161   return sd;
 162 }
 163
 164 void
 165 frv_sim_close (SIM_DESC sd, int quitting)
 166 {
 167   int i;
 168   /* Terminate cache support.  */
 169   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 170     {
 171       SIM_CPU* cpu = STATE_CPU (sd, i);
 172       frv_cache_term (CPU_INSN_CACHE (cpu));
 173       frv_cache_term (CPU_DATA_CACHE (cpu));
 174     }
 175 }
 176 \f
 177 SIM_RC
 178 sim_create_inferior (SIM_DESC sd, bfd *abfd, char * const *argv,
 179                      char * const *envp)
 180 {
 181   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 182   SIM_ADDR addr;
 183
 184   if (abfd != NULL)
 185     addr = bfd_get_start_address (abfd);
 186   else
 187     addr = 0;
 188   sim_pc_set (current_cpu, addr);
 189
 190   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 191      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 192      with `gdb`), we need to handle it because the user can change the
 193      argv on the fly via gdb's 'run'.  */
 194   if (STATE_PROG_ARGV (sd) != argv)
 195     {
 196       freeargv (STATE_PROG_ARGV (sd));
 197       STATE_PROG_ARGV (sd) = dupargv (argv);
 198     }
 199
 200   return SIM_RC_OK;
 201 }