gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000-2022 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions (a Red Hat company).
   4
   5    This file is part of GDB.
   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 #include "defs.h"
  21 #include "arch-utils.h"
  22 #include "target.h"
  23 #include "value.h"
  24 #include "mi-cmds.h"
  25 #include "mi-getopt.h"
  26 #include "ui-out.h"
  27 #include "disasm.h"
  28
  29 /* The arguments to be passed on the command line and parsed here are
  30    either:
  31
  32    START-ADDRESS: address to start the disassembly at.
  33    END-ADDRESS: address to end the disassembly at.
  34
  35    or:
  36
  37    FILENAME: The name of the file where we want disassemble from.
  38    LINE: The line around which we want to disassemble. It will
  39    disassemble the function that contains that line.
  40    HOW_MANY: Number of disassembly lines to display. With source, it
  41    is the number of disassembly lines only, not counting the source
  42    lines.
  43
  44    always required:
  45
  46    MODE: 0 -- disassembly.
  47          1 -- disassembly and source (with deprecated source-centric view).
  48          2 -- disassembly and opcodes.
  49          3 -- disassembly, source-centric and opcodes.
  50          4 -- disassembly, and source (with pc-centric view).
  51          5 -- disassembly, source (pc-centric) and opcodes.  */
  52
  53 void
  54 mi_cmd_disassemble (const char *command, char **argv, int argc)
  55 {
  56   struct gdbarch *gdbarch = get_current_arch ();
  57   struct ui_out *uiout = current_uiout;
  58   CORE_ADDR start;
  59
  60   int mode;
  61   gdb_disassembly_flags disasm_flags;
  62   struct symtab *s;
  63
  64   /* Which options have we processed ... */
  65   bool file_seen = false;
  66   bool line_seen = false;
  67   bool num_seen = false;
  68   bool start_seen = false;
  69   bool end_seen = false;
  70   bool addr_seen = false;
  71   bool opcodes_seen = false;
  72   bool source_seen = false;
  73
  74   /* ... and their corresponding value. */
  75   char *file_string = NULL;
  76   int line_num = -1;
  77   int how_many = -1;
  78   CORE_ADDR low = 0;
  79   CORE_ADDR high = 0;
  80   CORE_ADDR addr = 0;
  81
  82   /* Flags to handle the --opcodes option.  */
  83   enum opcodes_mode
  84   {
  85     OPCODES_DEFAULT, OPCODES_NONE, OPCODES_DISPLAY, OPCODES_BYTES
  86   };
  87   enum opcodes_mode opcodes_mode = OPCODES_DEFAULT;
  88
  89   /* Handle the -source option.  */
  90   bool show_source = false;
  91
  92   /* Options processing stuff.  */
  93   int oind = 0;
  94   char *oarg;
  95   enum opt
  96   {
  97     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT, ADDR_OPT, OPCODES_OPT,
  98     SHOW_SRC_OPT
  99   };
 100   static const struct mi_opt opts[] =
 101     {
 102       {"f", FILE_OPT, 1},
 103       {"l", LINE_OPT, 1},
 104       {"n", NUM_OPT, 1},
 105       {"s", START_OPT, 1},
 106       {"e", END_OPT, 1},
 107       {"a", ADDR_OPT, 1},
 108       {"-opcodes", OPCODES_OPT, 1},
 109       {"-source", SHOW_SRC_OPT, 0},
 110       { 0, 0, 0 }
 111     };
 112
 113   /* Get the options with their arguments. Keep track of what we
 114      encountered.  */
 115   while (1)
 116     {
 117       int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
 118                            &oind, &oarg);
 119       if (opt < 0)
 120         break;
 121       switch ((enum opt) opt)
 122         {
 123         case FILE_OPT:
 124           file_string = oarg;
 125           file_seen = true;
 126           break;
 127         case LINE_OPT:
 128           line_num = atoi (oarg);
 129           line_seen = true;
 130           break;
 131         case NUM_OPT:
 132           how_many = atoi (oarg);
 133           num_seen = true;
 134           break;
 135         case START_OPT:
 136           low = parse_and_eval_address (oarg);
 137           start_seen = true;
 138           break;
 139         case END_OPT:
 140           high = parse_and_eval_address (oarg);
 141           end_seen = true;
 142           break;
 143         case ADDR_OPT:
 144           addr = parse_and_eval_address (oarg);
 145           addr_seen = true;
 146           break;
 147         case OPCODES_OPT:
 148           opcodes_seen = true;
 149           if (strcmp (oarg, "none") == 0)
 150             opcodes_mode = OPCODES_NONE;
 151           else if (strcmp (oarg, "display") == 0)
 152             opcodes_mode = OPCODES_DISPLAY;
 153           else if (strcmp (oarg, "bytes") == 0)
 154             opcodes_mode = OPCODES_BYTES;
 155           else
 156             error (_("-data-disassemble: unknown value for -opcodes argument"));
 157           break;
 158         case SHOW_SRC_OPT:
 159           source_seen = true;
 160           show_source = true;
 161           break;
 162         }
 163     }
 164   argv += oind;
 165   argc -= oind;
 166
 167   /* Allow only filename + linenum (with how_many which is not
 168      required) OR start_addr + end_addr OR addr.  */
 169
 170   if (!(
 171           ( line_seen &&  file_seen &&              !start_seen && !end_seen
 172                                                                 && !addr_seen)
 173
 174        || (!line_seen && !file_seen && !num_seen &&  start_seen &&  end_seen
 175                                                                 && !addr_seen)
 176
 177        || (!line_seen && !file_seen && !num_seen && !start_seen && !end_seen
 178                                                                 &&  addr_seen))
 179       || argc > 1)
 180     error (_("-data-disassemble: Usage: "
 181              "( -f filename -l linenum [-n howmany] |"
 182              " -s startaddr -e endaddr | -a addr ) "
 183              "[ --opcodes mode ] [ --source ] [ [--] mode ]."));
 184
 185   if (argc == 1)
 186     {
 187       mode = atoi (argv[0]);
 188       if (mode < 0 || mode > 5)
 189         error (_("-data-disassemble: Mode argument must be in the range 0-5."));
 190     }
 191   else
 192     mode = 0;
 193
 194   if (mode != 0 && (source_seen || opcodes_seen))
 195     error (_("-data-disassemble: --opcodes and --source can only be used with mode 0"));
 196
 197   /* Convert the mode into a set of disassembly flags.  */
 198
 199   disasm_flags = 0;  /* Initialize here for -Wall.  */
 200   switch (mode)
 201     {
 202     case 0:
 203       break;
 204     case 1:
 205       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED;
 206       break;
 207     case 2:
 208       disasm_flags |= DISASSEMBLY_RAW_BYTES;
 209       break;
 210     case 3:
 211       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_RAW_BYTES;
 212       break;
 213     case 4:
 214       disasm_flags |= DISASSEMBLY_SOURCE;
 215       break;
 216     case 5:
 217       disasm_flags |= DISASSEMBLY_SOURCE | DISASSEMBLY_RAW_BYTES;
 218       break;
 219     default:
 220       gdb_assert_not_reached ("bad disassembly mode");
 221     }
 222
 223   /* Now handle the (optional) --opcodes argument.  This partially
 224      overrides the mode value.  */
 225   if (opcodes_mode != OPCODES_DEFAULT)
 226     {
 227       /* Remove any existing flags related to opcodes display.  */
 228       disasm_flags &= ~(DISASSEMBLY_RAW_BYTES | DISASSEMBLY_RAW_INSN);
 229
 230       /* Add back any required flags.  */
 231       if (opcodes_mode == OPCODES_DISPLAY)
 232         disasm_flags |= DISASSEMBLY_RAW_INSN;
 233       else if (opcodes_mode == OPCODES_BYTES)
 234         disasm_flags |= DISASSEMBLY_RAW_BYTES;
 235     }
 236
 237   /* Handle the optional --source argument.  */
 238   if (show_source)
 239     {
 240       disasm_flags &= ~DISASSEMBLY_SOURCE_DEPRECATED;
 241       disasm_flags |= DISASSEMBLY_SOURCE;
 242     }
 243
 244   /* We must get the function beginning and end where line_num is
 245      contained.  */
 246
 247   if (line_seen && file_seen)
 248     {
 249       s = lookup_symtab (file_string);
 250       if (s == NULL)
 251         error (_("-data-disassemble: Invalid filename."));
 252       if (!find_line_pc (s, line_num, &start))
 253         error (_("-data-disassemble: Invalid line number"));
 254       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 255         error (_("-data-disassemble: "
 256                  "No function contains specified address"));
 257     }
 258   else if (addr_seen)
 259     {
 260       if (find_pc_partial_function (addr, NULL, &low, &high) == 0)
 261         error (_("-data-disassemble: "
 262                  "No function contains specified address"));
 263     }
 264
 265   gdb_disassembly (gdbarch, uiout,
 266                    disasm_flags,
 267                    how_many, low, high);
 268 }