gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions (a Red Hat company).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "arch-utils.h"
  23 #include "target.h"
  24 #include "value.h"
  25 #include "mi-cmds.h"
  26 #include "mi-getopt.h"
  27 #include "gdb_string.h"
  28 #include "ui-out.h"
  29 #include "disasm.h"
  30
  31 /* The arguments to be passed on the command line and parsed here are:
  32
  33    either:
  34
  35    START-ADDRESS: address to start the disassembly at.
  36    END-ADDRESS: address to end the disassembly at.
  37
  38    or:
  39
  40    FILENAME: The name of the file where we want disassemble from.
  41    LINE: The line around which we want to disassemble. It will
  42    disassemble the function that contins that line.
  43    HOW_MANY: Number of disassembly lines to display. With source, it
  44    is the number of disassembly lines only, not counting the source
  45    lines.
  46
  47    always required:
  48
  49    MODE: 0 -- disassembly.
  50          1 -- disassembly and source.
  51          2 -- disassembly and opcodes.
  52          3 -- disassembly, source and opcodes.
  53 */
  54 void
  55 mi_cmd_disassemble (char *command, char **argv, int argc)
  56 {
  57   struct gdbarch *gdbarch = get_current_arch ();
  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 optind = 0;
  80   char *optarg;
  81   enum opt
  82   {
  83     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  84   };
  85   static struct mi_opt opts[] = {
  86     {"f", FILE_OPT, 1},
  87     {"l", LINE_OPT, 1},
  88     {"n", NUM_OPT, 1},
  89     {"s", START_OPT, 1},
  90     {"e", END_OPT, 1},
  91     { 0, 0, 0 }
  92   };
  93
  94   /* Get the options with their arguments. Keep track of what we
  95      encountered. */
  96   while (1)
  97     {
  98       int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
  99                            &optind, &optarg);
 100       if (opt < 0)
 101         break;
 102       switch ((enum opt) opt)
 103         {
 104         case FILE_OPT:
 105           file_string = xstrdup (optarg);
 106           file_seen = 1;
 107           make_cleanup (xfree, file_string);
 108           break;
 109         case LINE_OPT:
 110           line_num = atoi (optarg);
 111           line_seen = 1;
 112           break;
 113         case NUM_OPT:
 114           how_many = atoi (optarg);
 115           num_seen = 1;
 116           break;
 117         case START_OPT:
 118           low = parse_and_eval_address (optarg);
 119           start_seen = 1;
 120           break;
 121         case END_OPT:
 122           high = parse_and_eval_address (optarg);
 123           end_seen = 1;
 124           break;
 125         }
 126     }
 127   argv += optind;
 128   argc -= optind;
 129
 130   /* Allow only filename + linenum (with how_many which is not
 131      required) OR start_addr + and_addr */
 132
 133   if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
 134         || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
 135         || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
 136     error (_("-data-disassemble: Usage: ( [-f filename -l linenum [-n "
 137              "howmany]] | [-s startaddr -e endaddr]) [--] mode."));
 138
 139   if (argc != 1)
 140     error (_("-data-disassemble: Usage: [-f filename -l linenum "
 141              "[-n howmany]] [-s startaddr -e endaddr] [--] mode."));
 142
 143   mode = atoi (argv[0]);
 144   if (mode < 0 || mode > 3)
 145     error (_("-data-disassemble: Mode argument must be 0, 1, 2, or 3."));
 146
 147   /* Convert the mode into a set of disassembly flags */
 148
 149   disasm_flags = 0;
 150   if (mode & 0x1)
 151     disasm_flags |= DISASSEMBLY_SOURCE;
 152   if (mode & 0x2)
 153     disasm_flags |= DISASSEMBLY_RAW_INSN;
 154
 155   /* We must get the function beginning and end where line_num is
 156      contained. */
 157
 158   if (line_seen && file_seen)
 159     {
 160       s = lookup_symtab (file_string);
 161       if (s == NULL)
 162         error (_("-data-disassemble: Invalid filename."));
 163       if (!find_line_pc (s, line_num, &start))
 164         error (_("-data-disassemble: Invalid line number"));
 165       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 166         error (_("-data-disassemble: "
 167                  "No function contains specified address"));
 168     }
 169
 170   gdb_disassembly (gdbarch, uiout,
 171                    file_string,
 172                    disasm_flags,
 173                    how_many, low, high);
 174
 175   do_cleanups (cleanups);
 176 }