gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000, 2001, 2002, 2007 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 "target.h"
  22 #include "value.h"
  23 #include "mi-cmds.h"
  24 #include "mi-getopt.h"
  25 #include "gdb_string.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
  31    either:
  32
  33    START-ADDRESS: address to start the disassembly at.
  34    END-ADDRESS: address to end the disassembly at.
  35
  36    or:
  37
  38    FILENAME: The name of the file where we want disassemble from.
  39    LINE: The line around which we want to disassemble. It will
  40    disassemble the function that contins that line.
  41    HOW_MANY: Number of disassembly lines to display. In mixed mode, it
  42    is the number of disassembly lines only, not counting the source
  43    lines.
  44
  45    always required:
  46
  47    MODE: 0 or 1 for disassembly only, or mixed source and disassembly,
  48    respectively. */
  49 enum mi_cmd_result
  50 mi_cmd_disassemble (char *command, char **argv, int argc)
  51 {
  52   enum mi_cmd_result retval;
  53   CORE_ADDR start;
  54
  55   int mixed_source_and_assembly;
  56   struct symtab *s;
  57
  58   /* Which options have we processed ... */
  59   int file_seen = 0;
  60   int line_seen = 0;
  61   int num_seen = 0;
  62   int start_seen = 0;
  63   int end_seen = 0;
  64
  65   /* ... and their corresponding value. */
  66   char *file_string = NULL;
  67   int line_num = -1;
  68   int how_many = -1;
  69   CORE_ADDR low = 0;
  70   CORE_ADDR high = 0;
  71
  72   /* Options processing stuff. */
  73   int optind = 0;
  74   char *optarg;
  75   enum opt
  76   {
  77     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  78   };
  79   static struct mi_opt opts[] = {
  80     {"f", FILE_OPT, 1},
  81     {"l", LINE_OPT, 1},
  82     {"n", NUM_OPT, 1},
  83     {"s", START_OPT, 1},
  84     {"e", END_OPT, 1},
  85     { 0, 0, 0 }
  86   };
  87
  88   /* Get the options with their arguments. Keep track of what we
  89      encountered. */
  90   while (1)
  91     {
  92       int opt = mi_getopt ("mi_cmd_disassemble", argc, argv, opts,
  93                            &optind, &optarg);
  94       if (opt < 0)
  95         break;
  96       switch ((enum opt) opt)
  97         {
  98         case FILE_OPT:
  99           file_string = xstrdup (optarg);
 100           file_seen = 1;
 101           break;
 102         case LINE_OPT:
 103           line_num = atoi (optarg);
 104           line_seen = 1;
 105           break;
 106         case NUM_OPT:
 107           how_many = atoi (optarg);
 108           num_seen = 1;
 109           break;
 110         case START_OPT:
 111           low = parse_and_eval_address (optarg);
 112           start_seen = 1;
 113           break;
 114         case END_OPT:
 115           high = parse_and_eval_address (optarg);
 116           end_seen = 1;
 117           break;
 118         }
 119     }
 120   argv += optind;
 121   argc -= optind;
 122
 123   /* Allow only filename + linenum (with how_many which is not
 124      required) OR start_addr + and_addr */
 125
 126   if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
 127         || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
 128         || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
 129     error
 130       ("mi_cmd_disassemble: Usage: ( [-f filename -l linenum [-n howmany]] | [-s startaddr -e endaddr]) [--] mixed_mode.");
 131
 132   if (argc != 1)
 133     error
 134       ("mi_cmd_disassemble: Usage: [-f filename -l linenum [-n howmany]] [-s startaddr -e endaddr] [--] mixed_mode.");
 135
 136   mixed_source_and_assembly = atoi (argv[0]);
 137   if ((mixed_source_and_assembly != 0) && (mixed_source_and_assembly != 1))
 138     error (_("mi_cmd_disassemble: Mixed_mode argument must be 0 or 1."));
 139
 140
 141   /* We must get the function beginning and end where line_num is
 142      contained. */
 143
 144   if (line_seen && file_seen)
 145     {
 146       s = lookup_symtab (file_string);
 147       if (s == NULL)
 148         error (_("mi_cmd_disassemble: Invalid filename."));
 149       if (!find_line_pc (s, line_num, &start))
 150         error (_("mi_cmd_disassemble: Invalid line number"));
 151       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 152         error (_("mi_cmd_disassemble: No function contains specified address"));
 153     }
 154
 155   gdb_disassembly (uiout,
 156                    file_string,
 157                    line_num,
 158                    mixed_source_and_assembly, how_many, low, high);
 159
 160   return MI_CMD_DONE;
 161 }