gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000-2017 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 contins 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 (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, disasm_flags;
  61   struct symtab *s;
  62
  63   /* Which options have we processed ... */
  64   int file_seen = 0;
  65   int line_seen = 0;
  66   int num_seen = 0;
  67   int start_seen = 0;
  68   int end_seen = 0;
  69
  70   /* ... and their corresponding value. */
  71   char *file_string = NULL;
  72   int line_num = -1;
  73   int how_many = -1;
  74   CORE_ADDR low = 0;
  75   CORE_ADDR high = 0;
  76   struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
  77
  78   /* Options processing stuff.  */
  79   int oind = 0;
  80   char *oarg;
  81   enum opt
  82   {
  83     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  84   };
  85   static const struct mi_opt opts[] =
  86     {
  87       {"f", FILE_OPT, 1},
  88       {"l", LINE_OPT, 1},
  89       {"n", NUM_OPT, 1},
  90       {"s", START_OPT, 1},
  91       {"e", END_OPT, 1},
  92       { 0, 0, 0 }
  93     };
  94
  95   /* Get the options with their arguments. Keep track of what we
  96      encountered.  */
  97   while (1)
  98     {
  99       int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
 100                            &oind, &oarg);
 101       if (opt < 0)
 102         break;
 103       switch ((enum opt) opt)
 104         {
 105         case FILE_OPT:
 106           file_string = xstrdup (oarg);
 107           file_seen = 1;
 108           make_cleanup (xfree, file_string);
 109           break;
 110         case LINE_OPT:
 111           line_num = atoi (oarg);
 112           line_seen = 1;
 113           break;
 114         case NUM_OPT:
 115           how_many = atoi (oarg);
 116           num_seen = 1;
 117           break;
 118         case START_OPT:
 119           low = parse_and_eval_address (oarg);
 120           start_seen = 1;
 121           break;
 122         case END_OPT:
 123           high = parse_and_eval_address (oarg);
 124           end_seen = 1;
 125           break;
 126         }
 127     }
 128   argv += oind;
 129   argc -= oind;
 130
 131   /* Allow only filename + linenum (with how_many which is not
 132      required) OR start_addr + end_addr.  */
 133
 134   if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
 135         || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
 136         || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
 137     error (_("-data-disassemble: Usage: ( [-f filename -l linenum [-n "
 138              "howmany]] | [-s startaddr -e endaddr]) [--] mode."));
 139
 140   if (argc != 1)
 141     error (_("-data-disassemble: Usage: [-f filename -l linenum "
 142              "[-n howmany]] [-s startaddr -e endaddr] [--] mode."));
 143
 144   mode = atoi (argv[0]);
 145   if (mode < 0 || mode > 5)
 146     error (_("-data-disassemble: Mode argument must be in the range 0-5."));
 147
 148   /* Convert the mode into a set of disassembly flags.  */
 149
 150   disasm_flags = 0;  /* Initialize here for -Wall.  */
 151   switch (mode)
 152     {
 153     case 0:
 154       break;
 155     case 1:
 156       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED;
 157       break;
 158     case 2:
 159       disasm_flags |= DISASSEMBLY_RAW_INSN;
 160       break;
 161     case 3:
 162       disasm_flags |= DISASSEMBLY_SOURCE_DEPRECATED | DISASSEMBLY_RAW_INSN;
 163       break;
 164     case 4:
 165       disasm_flags |= DISASSEMBLY_SOURCE;
 166       break;
 167     case 5:
 168       disasm_flags |= DISASSEMBLY_SOURCE | DISASSEMBLY_RAW_INSN;
 169       break;
 170     default:
 171       gdb_assert_not_reached ("bad disassembly mode");
 172     }
 173
 174   /* We must get the function beginning and end where line_num is
 175      contained.  */
 176
 177   if (line_seen && file_seen)
 178     {
 179       s = lookup_symtab (file_string);
 180       if (s == NULL)
 181         error (_("-data-disassemble: Invalid filename."));
 182       if (!find_line_pc (s, line_num, &start))
 183         error (_("-data-disassemble: Invalid line number"));
 184       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 185         error (_("-data-disassemble: "
 186                  "No function contains specified address"));
 187     }
 188
 189   gdb_disassembly (gdbarch, uiout,
 190                    file_string,
 191                    disasm_flags,
 192                    how_many, low, high);
 193
 194   do_cleanups (cleanups);
 195 }