sim/frv/sim-if.c

   1 /* Main simulator entry points specific to the FRV.
   2    Copyright (C) 1998-2016 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 #ifdef HAVE_STDLIB_H
  24 #include <stdlib.h>
  25 #endif
  26 #include "sim-options.h"
  27 #include "libiberty.h"
  28 #include "bfd.h"
  29 #include "elf-bfd.h"
  30
  31 static void free_state (SIM_DESC);
  32 static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
  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 /* Create an instance of the simulator.  */
  46
  47 SIM_DESC
  48 sim_open (kind, callback, abfd, argv)
  49      SIM_OPEN_KIND kind;
  50      host_callback *callback;
  51      bfd *abfd;
  52      char **argv;
  53 {
  54   char c;
  55   int i;
  56   unsigned long elf_flags = 0;
  57   SIM_DESC sd = sim_state_alloc (kind, callback);
  58
  59   /* The cpu data is kept in a separately allocated chunk of memory.  */
  60   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  61     {
  62       free_state (sd);
  63       return 0;
  64     }
  65
  66 #if 0 /* FIXME: pc is in mach-specific struct */
  67   /* FIXME: watchpoints code shouldn't need this */
  68   {
  69     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  70     STATE_WATCHPOINTS (sd)->pc = &(PC);
  71     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  72   }
  73 #endif
  74
  75   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  76     {
  77       free_state (sd);
  78       return 0;
  79     }
  80
  81   /* These options override any module options.
  82      Obviously ambiguity should be avoided, however the caller may wish to
  83      augment the meaning of an option.  */
  84   sim_add_option_table (sd, NULL, frv_options);
  85
  86   /* getopt will print the error message so we just have to exit if this fails.
  87      FIXME: Hmmm...  in the case of gdb we need getopt to call
  88      print_filtered.  */
  89   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  90     {
  91       free_state (sd);
  92       return 0;
  93     }
  94
  95   /* Allocate core managed memory if none specified by user.
  96      Use address 4 here in case the user wanted address 0 unmapped.  */
  97   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  98     sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
  99
 100   /* check for/establish the reference program image */
 101   if (sim_analyze_program (sd,
 102                            (STATE_PROG_ARGV (sd) != NULL
 103                             ? *STATE_PROG_ARGV (sd)
 104                             : NULL),
 105                            abfd) != SIM_RC_OK)
 106     {
 107       free_state (sd);
 108       return 0;
 109     }
 110
 111   /* set machine and architecture correctly instead of defaulting to frv */
 112   {
 113     bfd *prog_bfd = STATE_PROG_BFD (sd);
 114     if (prog_bfd != NULL)
 115       {
 116         struct elf_backend_data *backend_data;
 117
 118         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 119           {
 120             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 121                             STATE_MY_NAME (sd),
 122                             bfd_get_filename (prog_bfd));
 123             free_state (sd);
 124             return 0;
 125           }
 126
 127         backend_data = get_elf_backend_data (prog_bfd);
 128
 129         if (backend_data != NULL)
 130           backend_data->elf_backend_object_p (prog_bfd);
 131
 132         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 133       }
 134   }
 135
 136   /* Establish any remaining configuration options.  */
 137   if (sim_config (sd) != SIM_RC_OK)
 138     {
 139       free_state (sd);
 140       return 0;
 141     }
 142
 143   if (sim_post_argv_init (sd) != SIM_RC_OK)
 144     {
 145       free_state (sd);
 146       return 0;
 147     }
 148
 149   /* Open a copy of the cpu descriptor table.  */
 150   {
 151     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 152                                              CGEN_ENDIAN_BIG);
 153     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 154       {
 155         SIM_CPU *cpu = STATE_CPU (sd, i);
 156         CPU_CPU_DESC (cpu) = cd;
 157         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 158         CPU_ELF_FLAGS (cpu) = elf_flags;
 159       }
 160     frv_cgen_init_dis (cd);
 161   }
 162
 163   /* Initialize various cgen things not done by common framework.
 164      Must be done after frv_cgen_cpu_open.  */
 165   cgen_init (sd);
 166
 167   /* CPU specific initialization.  */
 168   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 169     {
 170       SIM_CPU* cpu = STATE_CPU (sd, i);
 171       frv_initialize (cpu, sd);
 172     }
 173
 174   return sd;
 175 }
 176
 177 void
 178 frv_sim_close (sd, quitting)
 179      SIM_DESC sd;
 180      int quitting;
 181 {
 182   int i;
 183   /* Terminate cache support.  */
 184   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 185     {
 186       SIM_CPU* cpu = STATE_CPU (sd, i);
 187       frv_cache_term (CPU_INSN_CACHE (cpu));
 188       frv_cache_term (CPU_DATA_CACHE (cpu));
 189     }
 190 }
 191 \f
 192 SIM_RC
 193 sim_create_inferior (sd, abfd, argv, envp)
 194      SIM_DESC sd;
 195      bfd *abfd;
 196      char **argv;
 197      char **envp;
 198 {
 199   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 200   SIM_ADDR addr;
 201
 202   if (abfd != NULL)
 203     addr = bfd_get_start_address (abfd);
 204   else
 205     addr = 0;
 206   sim_pc_set (current_cpu, addr);
 207
 208   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 209      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 210      with `gdb`), we need to handle it because the user can change the
 211      argv on the fly via gdb's 'run'.  */
 212   if (STATE_PROG_ARGV (sd) != argv)
 213     {
 214       freeargv (STATE_PROG_ARGV (sd));
 215       STATE_PROG_ARGV (sd) = dupargv (argv);
 216     }
 217
 218   return SIM_RC_OK;
 219 }