gnu/dist/gdb6/gdb/mi/mi-cmd-disas.c

   1 /* MI Command Set - disassemble commands.
   2    Copyright (C) 2000, 2001, 2002 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 2 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, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "defs.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. In mixed mode, it
  44    is the number of disassembly lines only, not counting the source
  45    lines.
  46
  47    always required:
  48
  49    MODE: 0 or 1 for disassembly only, or mixed source and disassembly,
  50    respectively. */
  51 enum mi_cmd_result
  52 mi_cmd_disassemble (char *command, char **argv, int argc)
  53 {
  54   enum mi_cmd_result retval;
  55   CORE_ADDR start;
  56
  57   int mixed_source_and_assembly;
  58   struct symtab *s;
  59
  60   /* Which options have we processed ... */
  61   int file_seen = 0;
  62   int line_seen = 0;
  63   int num_seen = 0;
  64   int start_seen = 0;
  65   int end_seen = 0;
  66
  67   /* ... and their corresponding value. */
  68   char *file_string = NULL;
  69   int line_num = -1;
  70   int how_many = -1;
  71   CORE_ADDR low = 0;
  72   CORE_ADDR high = 0;
  73
  74   /* Options processing stuff. */
  75   int optind = 0;
  76   char *optarg;
  77   enum opt
  78   {
  79     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  80   };
  81   static struct mi_opt opts[] = {
  82     {"f", FILE_OPT, 1},
  83     {"l", LINE_OPT, 1},
  84     {"n", NUM_OPT, 1},
  85     {"s", START_OPT, 1},
  86     {"e", END_OPT, 1},
  87     0
  88   };
  89
  90   /* Get the options with their arguments. Keep track of what we
  91      encountered. */
  92   while (1)
  93     {
  94       int opt = mi_getopt ("mi_cmd_disassemble", argc, argv, opts,
  95                            &optind, &optarg);
  96       if (opt < 0)
  97         break;
  98       switch ((enum opt) opt)
  99         {
 100         case FILE_OPT:
 101           file_string = xstrdup (optarg);
 102           file_seen = 1;
 103           break;
 104         case LINE_OPT:
 105           line_num = atoi (optarg);
 106           line_seen = 1;
 107           break;
 108         case NUM_OPT:
 109           how_many = atoi (optarg);
 110           num_seen = 1;
 111           break;
 112         case START_OPT:
 113           low = parse_and_eval_address (optarg);
 114           start_seen = 1;
 115           break;
 116         case END_OPT:
 117           high = parse_and_eval_address (optarg);
 118           end_seen = 1;
 119           break;
 120         }
 121     }
 122   argv += optind;
 123   argc -= optind;
 124
 125   /* Allow only filename + linenum (with how_many which is not
 126      required) OR start_addr + and_addr */
 127
 128   if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
 129         || (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
 130         || (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
 131     error
 132       ("mi_cmd_disassemble: Usage: ( [-f filename -l linenum [-n howmany]] | [-s startaddr -e endaddr]) [--] mixed_mode.");
 133
 134   if (argc != 1)
 135     error
 136       ("mi_cmd_disassemble: Usage: [-f filename -l linenum [-n howmany]] [-s startaddr -e endaddr] [--] mixed_mode.");
 137
 138   mixed_source_and_assembly = atoi (argv[0]);
 139   if ((mixed_source_and_assembly != 0) && (mixed_source_and_assembly != 1))
 140     error (_("mi_cmd_disassemble: Mixed_mode argument must be 0 or 1."));
 141
 142
 143   /* We must get the function beginning and end where line_num is
 144      contained. */
 145
 146   if (line_seen && file_seen)
 147     {
 148       s = lookup_symtab (file_string);
 149       if (s == NULL)
 150         error (_("mi_cmd_disassemble: Invalid filename."));
 151       if (!find_line_pc (s, line_num, &start))
 152         error (_("mi_cmd_disassemble: Invalid line number"));
 153       if (find_pc_partial_function (start, NULL, &low, &high) == 0)
 154         error (_("mi_cmd_disassemble: No function contains specified address"));
 155     }
 156
 157   gdb_disassembly (uiout,
 158                    file_string,
 159                    line_num,
 160                    mixed_source_and_assembly, how_many, low, high);
 161
 162   return MI_CMD_DONE;
 163 }