gdb/mi/mi-cmd-disas.c - gdb

Functions defined

Source code

  1. /* MI Command Set - disassemble commands.
  2.    Copyright (C) 2000-2015 Free Software Foundation, Inc.
  3.    Contributed by Cygnus Solutions (a Red Hat company).

  5.    This file is part of GDB.

  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.

  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.

  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/>.  */

  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"

  29. /* The arguments to be passed on the command line and parsed here are
  30.    either:

  32.    START-ADDRESS: address to start the disassembly at.
  33.    END-ADDRESS: address to end the disassembly at.

  35.    or:

  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.

  44.    always required:

  46.    MODE: 0 -- disassembly.
  47.          1 -- disassembly and source.
  48.          2 -- disassembly and opcodes.
  49.          3 -- disassembly, source and opcodes.
  50. */

  52. void
  53. ‌mi_cmd_disassemble (char *command, char **argv, int argc)
  54. {
  55.   struct gdbarch *gdbarch = get_current_arch ();
  56.   struct ui_out *uiout = current_uiout;
  57.   CORE_ADDR start;

  59.   int mode, disasm_flags;
  60.   struct symtab *s;

  62.   /* Which options have we processed ... */
  63.   int file_seen = 0;
  64.   int line_seen = 0;
  65.   int num_seen = 0;
  66.   int start_seen = 0;
  67.   int end_seen = 0;

  69.   /* ... and their corresponding value. */
  70.   char *file_string = NULL;
  71.   int line_num = -1;
  72.   int how_many = -1;
  73.   CORE_ADDR low = 0;
  74.   CORE_ADDR high = 0;
  75.   struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);

  77.   /* Options processing stuff.  */
  78.   int oind = 0;
  79.   char *oarg;
  80.   enum opt
  81.   {
  82.     FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  83.   };
  84.   static const struct mi_opt opts[] =
  85.     {
  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.     };

  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.                            &oind, &oarg);
  100.       if (opt < 0)
  101.         break;
  102.       switch ((enum opt) opt)
  103.         {
  104.         case FILE_OPT:
  105.           file_string = xstrdup (oarg);
  106.           file_seen = 1;
  107.           make_cleanup (xfree, file_string);
  108.           break;
  109.         case LINE_OPT:
  110.           line_num = atoi (oarg);
  111.           line_seen = 1;
  112.           break;
  113.         case NUM_OPT:
  114.           how_many = atoi (oarg);
  115.           num_seen = 1;
  116.           break;
  117.         case START_OPT:
  118.           low = parse_and_eval_address (oarg);
  119.           start_seen = 1;
  120.           break;
  121.         case END_OPT:
  122.           high = parse_and_eval_address (oarg);
  123.           end_seen = 1;
  124.           break;
  125.         }
  126.     }
  127.   argv += oind;
  128.   argc -= oind;

  130.   /* Allow only filename + linenum (with how_many which is not
  131.      required) OR start_addr + end_addr.  */

  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."));

  139.   if (argc != 1)
  140.     error (_("-data-disassemble: Usage: [-f filename -l linenum "
  141.              "[-n howmany]] [-s startaddr -e endaddr] [--] mode."));

  143.   mode = atoi (argv[0]);
  144.   if (mode < 0 || mode > 3)
  145.     error (_("-data-disassemble: Mode argument must be 0, 1, 2, or 3."));

  147.   /* Convert the mode into a set of disassembly flags.  */

  149.   disasm_flags = 0;
  150.   if (mode & 0x1)
  151.     disasm_flags |= DISASSEMBLY_SOURCE;
  152.   if (mode & 0x2)
  153.     disasm_flags |= DISASSEMBLY_RAW_INSN;

  155.   /* We must get the function beginning and end where line_num is
  156.      contained.  */

  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.     }

  170.   gdb_disassembly (gdbarch, uiout,
  171.                      file_string,
  172.                      disasm_flags,
  173.                    how_many, low, high);

  175.   do_cleanups (cleanups);
  176. }