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

/* MI Command Set - disassemble commands.
   Copyright (C) 2000, 2001, 2002, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.
   Contributed by Cygnus Solutions (a Red Hat company).

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "arch-utils.h"
#include "target.h"
#include "value.h"
#include "mi-cmds.h"
#include "mi-getopt.h"
#include "gdb_string.h"
#include "ui-out.h"
#include "disasm.h"

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

   either:

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

   or:

   FILENAME: The name of the file where we want disassemble from.
   LINE: The line around which we want to disassemble. It will
   disassemble the function that contins that line.
   HOW_MANY: Number of disassembly lines to display. With source, it
   is the number of disassembly lines only, not counting the source
   lines.  

   always required:

   MODE: 0 -- disassembly.
         1 -- disassembly and source.
         2 -- disassembly and opcodes.
         3 -- disassembly, source and opcodes.
*/
void
mi_cmd_disassemble (char *command, char **argv, int argc)
{
  struct gdbarch *gdbarch = get_current_arch ();
  CORE_ADDR start;

  int mode, disasm_flags;
  struct symtab *s;

  /* Which options have we processed ... */
  int file_seen = 0;
  int line_seen = 0;
  int num_seen = 0;
  int start_seen = 0;
  int end_seen = 0;

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

  /* Options processing stuff. */
  int optind = 0;
  char *optarg;
  enum opt
  {
    FILE_OPT, LINE_OPT, NUM_OPT, START_OPT, END_OPT
  };
  static struct mi_opt opts[] = {
    {"f", FILE_OPT, 1},
    {"l", LINE_OPT, 1},
    {"n", NUM_OPT, 1},
    {"s", START_OPT, 1},
    {"e", END_OPT, 1},
    { 0, 0, 0 }
  };

  /* Get the options with their arguments. Keep track of what we
     encountered. */
  while (1)
    {
      int opt = mi_getopt ("-data-disassemble", argc, argv, opts,
			   &optind, &optarg);
      if (opt < 0)
	break;
      switch ((enum opt) opt)
	{
	case FILE_OPT:
	  file_string = xstrdup (optarg);
	  file_seen = 1;
	  make_cleanup (xfree, file_string);
	  break;
	case LINE_OPT:
	  line_num = atoi (optarg);
	  line_seen = 1;
	  break;
	case NUM_OPT:
	  how_many = atoi (optarg);
	  num_seen = 1;
	  break;
	case START_OPT:
	  low = parse_and_eval_address (optarg);
	  start_seen = 1;
	  break;
	case END_OPT:
	  high = parse_and_eval_address (optarg);
	  end_seen = 1;
	  break;
	}
    }
  argv += optind;
  argc -= optind;

  /* Allow only filename + linenum (with how_many which is not
     required) OR start_addr + and_addr */

  if (!((line_seen && file_seen && num_seen && !start_seen && !end_seen)
	|| (line_seen && file_seen && !num_seen && !start_seen && !end_seen)
	|| (!line_seen && !file_seen && !num_seen && start_seen && end_seen)))
    error (_("-data-disassemble: Usage: ( [-f filename -l linenum [-n "
	     "howmany]] | [-s startaddr -e endaddr]) [--] mode."));

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

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

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

  disasm_flags = 0;
  if (mode & 0x1)
    disasm_flags |= DISASSEMBLY_SOURCE;
  if (mode & 0x2)
    disasm_flags |= DISASSEMBLY_RAW_INSN;

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

  if (line_seen && file_seen)
    {
      s = lookup_symtab (file_string);
      if (s == NULL)
	error (_("-data-disassemble: Invalid filename."));
      if (!find_line_pc (s, line_num, &start))
	error (_("-data-disassemble: Invalid line number"));
      if (find_pc_partial_function (start, NULL, &low, &high) == 0)
	error (_("-data-disassemble: "
		 "No function contains specified address"));
    }

  gdb_disassembly (gdbarch, uiout,
  		   file_string,
  		   disasm_flags,
		   how_many, low, high);

  do_cleanups (cleanups);
}