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 #define WANT_CPU
  21 #define WANT_CPU_FRVBF
  22 #include "sim-main.h"
  23 #include <stdlib.h>
  24 #include "sim-options.h"
  25 #include "libiberty.h"
  26 #include "bfd.h"
  27 #include "elf-bfd.h"
  28
  29 static void free_state (SIM_DESC);
  30 static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
  31 \f
  32 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  33
  34 static void
  35 free_state (SIM_DESC sd)
  36 {
  37   if (STATE_MODULES (sd) != NULL)
  38     sim_module_uninstall (sd);
  39   sim_cpu_free_all (sd);
  40   sim_state_free (sd);
  41 }
  42
  43 /* Create an instance of the simulator.  */
  44
  45 SIM_DESC
  46 sim_open (kind, callback, abfd, argv)
  47      SIM_OPEN_KIND kind;
  48      host_callback *callback;
  49      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   /* The cpu data is kept in a separately allocated chunk of memory.  */
  58   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  59     {
  60       free_state (sd);
  61       return 0;
  62     }
  63
  64 #if 0 /* FIXME: pc is in mach-specific struct */
  65   /* FIXME: watchpoints code shouldn't need this */
  66   {
  67     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  68     STATE_WATCHPOINTS (sd)->pc = &(PC);
  69   }
  70 #endif
  71
  72   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  73     {
  74       free_state (sd);
  75       return 0;
  76     }
  77
  78   /* These options override any module options.
  79      Obviously ambiguity should be avoided, however the caller may wish to
  80      augment the meaning of an option.  */
  81   sim_add_option_table (sd, NULL, frv_options);
  82
  83   /* The parser will print an error message for us, so we silently return.  */
  84   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  85     {
  86       free_state (sd);
  87       return 0;
  88     }
  89
  90   /* Allocate core managed memory if none specified by user.
  91      Use address 4 here in case the user wanted address 0 unmapped.  */
  92   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  93     sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
  94
  95   /* check for/establish the reference program image */
  96   if (sim_analyze_program (sd,
  97                            (STATE_PROG_ARGV (sd) != NULL
  98                             ? *STATE_PROG_ARGV (sd)
  99                             : NULL),
 100                            abfd) != SIM_RC_OK)
 101     {
 102       free_state (sd);
 103       return 0;
 104     }
 105
 106   /* set machine and architecture correctly instead of defaulting to frv */
 107   {
 108     bfd *prog_bfd = STATE_PROG_BFD (sd);
 109     if (prog_bfd != NULL)
 110       {
 111         struct elf_backend_data *backend_data;
 112
 113         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 114           {
 115             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 116                             STATE_MY_NAME (sd),
 117                             bfd_get_filename (prog_bfd));
 118             free_state (sd);
 119             return 0;
 120           }
 121
 122         backend_data = get_elf_backend_data (prog_bfd);
 123
 124         if (backend_data != NULL)
 125           backend_data->elf_backend_object_p (prog_bfd);
 126
 127         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 128       }
 129   }
 130
 131   /* Establish any remaining configuration options.  */
 132   if (sim_config (sd) != SIM_RC_OK)
 133     {
 134       free_state (sd);
 135       return 0;
 136     }
 137
 138   if (sim_post_argv_init (sd) != SIM_RC_OK)
 139     {
 140       free_state (sd);
 141       return 0;
 142     }
 143
 144   /* Open a copy of the cpu descriptor table.  */
 145   {
 146     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 147                                              CGEN_ENDIAN_BIG);
 148     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 149       {
 150         SIM_CPU *cpu = STATE_CPU (sd, i);
 151         CPU_CPU_DESC (cpu) = cd;
 152         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 153         CPU_ELF_FLAGS (cpu) = elf_flags;
 154       }
 155     frv_cgen_init_dis (cd);
 156   }
 157
 158   /* Initialize various cgen things not done by common framework.
 159      Must be done after frv_cgen_cpu_open.  */
 160   cgen_init (sd);
 161
 162   /* CPU specific initialization.  */
 163   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 164     {
 165       SIM_CPU* cpu = STATE_CPU (sd, i);
 166       frv_initialize (cpu, sd);
 167     }
 168
 169   return sd;
 170 }
 171
 172 void
 173 frv_sim_close (sd, quitting)
 174      SIM_DESC sd;
 175      int quitting;
 176 {
 177   int i;
 178   /* Terminate cache support.  */
 179   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 180     {
 181       SIM_CPU* cpu = STATE_CPU (sd, i);
 182       frv_cache_term (CPU_INSN_CACHE (cpu));
 183       frv_cache_term (CPU_DATA_CACHE (cpu));
 184     }
 185 }
 186 \f
 187 SIM_RC
 188 sim_create_inferior (sd, abfd, argv, envp)
 189      SIM_DESC sd;
 190      bfd *abfd;
 191      char * const *argv;
 192      char * const *envp;
 193 {
 194   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 195   SIM_ADDR addr;
 196
 197   if (abfd != NULL)
 198     addr = bfd_get_start_address (abfd);
 199   else
 200     addr = 0;
 201   sim_pc_set (current_cpu, addr);
 202
 203   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 204      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 205      with `gdb`), we need to handle it because the user can change the
 206      argv on the fly via gdb's 'run'.  */
 207   if (STATE_PROG_ARGV (sd) != argv)
 208     {
 209       freeargv (STATE_PROG_ARGV (sd));
 210       STATE_PROG_ARGV (sd) = dupargv (argv);
 211     }
 212
 213   return SIM_RC_OK;
 214 }