mi-main.c

这个是LINUX下的GDB调度工具的源码

	}
      else
	{
	  do_cleanups (list_cleanup);
	  mi_error_message = xstrprintf ("bad register number");
	  return MI_CMD_ERROR;
	}
    }
  do_cleanups (list_cleanup);
  return MI_CMD_DONE;
}

/* Output one register's contents in the desired format. */
static int
get_register (int regnum, int format)
{
  char buffer[MAX_REGISTER_SIZE];
  int optim;
  int realnum;
  CORE_ADDR addr;
  enum lval_type lval;
  static struct ui_stream *stb = NULL;

  stb = ui_out_stream_new (uiout);

  if (format == 'N')
    format = 0;

  frame_register (deprecated_selected_frame, regnum, &optim, &lval, &addr,
		  &realnum, buffer);

  if (optim)
    {
      mi_error_message = xstrprintf ("Optimized out");
      return -1;
    }

  if (format == 'r')
    {
      int j;
      char *ptr, buf[1024];

      strcpy (buf, "0x");
      ptr = buf + 2;
      for (j = 0; j < register_size (current_gdbarch, regnum); j++)
	{
	  int idx = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? j
	  : register_size (current_gdbarch, regnum) - 1 - j;
	  sprintf (ptr, "%02x", (unsigned char) buffer[idx]);
	  ptr += 2;
	}
      ui_out_field_string (uiout, "value", buf);
      /*fputs_filtered (buf, gdb_stdout); */
    }
  else
    {
      val_print (register_type (current_gdbarch, regnum), buffer, 0, 0,
		 stb->stream, format, 1, 0, Val_pretty_default);
      ui_out_field_stream (uiout, "value", stb);
      ui_out_stream_delete (stb);
    }
  return 1;
}

/* Write given values into registers. The registers and values are
   given as pairs. The corresponding MI command is 
   -data-write-register-values <format> [<regnum1> <value1>...<regnumN> <valueN>]*/
enum mi_cmd_result
mi_cmd_data_write_register_values (char *command, char **argv, int argc)
{
  int regnum;
  int i;
  int numregs;
  LONGEST value;
  char format;

  /* Note that the test for a valid register must include checking the
     REGISTER_NAME because NUM_REGS may be allocated for the union of
     the register sets within a family of related processors.  In this
     case, some entries of REGISTER_NAME will change depending upon
     the particular processor being debugged.  */

  numregs = NUM_REGS + NUM_PSEUDO_REGS;

  if (argc == 0)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_write_register_values: Usage: -data-write-register-values <format> [<regnum1> <value1>...<regnumN> <valueN>]");
      return MI_CMD_ERROR;
    }

  format = (int) argv[0][0];

  if (!target_has_registers)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_write_register_values: No registers.");
      return MI_CMD_ERROR;
    }

  if (!(argc - 1))
    {
      mi_error_message = xstrprintf ("mi_cmd_data_write_register_values: No regs and values specified.");
      return MI_CMD_ERROR;
    }

  if ((argc - 1) % 2)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_write_register_values: Regs and vals are not in pairs.");
      return MI_CMD_ERROR;
    }

  for (i = 1; i < argc; i = i + 2)
    {
      regnum = atoi (argv[i]);

      if (regnum >= 0
	  && regnum < numregs
	  && REGISTER_NAME (regnum) != NULL
	  && *REGISTER_NAME (regnum) != '\000')
	{
	  void *buffer;
	  struct cleanup *old_chain;

	  /* Get the value as a number */
	  value = parse_and_eval_address (argv[i + 1]);
	  /* Get the value into an array */
	  buffer = xmalloc (DEPRECATED_REGISTER_SIZE);
	  old_chain = make_cleanup (xfree, buffer);
	  store_signed_integer (buffer, DEPRECATED_REGISTER_SIZE, value);
	  /* Write it down */
	  deprecated_write_register_bytes (DEPRECATED_REGISTER_BYTE (regnum), buffer, register_size (current_gdbarch, regnum));
	  /* Free the buffer.  */
	  do_cleanups (old_chain);
	}
      else
	{
	  mi_error_message = xstrprintf ("bad register number");
	  return MI_CMD_ERROR;
	}
    }
  return MI_CMD_DONE;
}

#if 0
/*This is commented out because we decided it was not useful. I leave
   it, just in case. ezannoni:1999-12-08 */

/* Assign a value to a variable. The expression argument must be in
   the form A=2 or "A = 2" (I.e. if there are spaces it needs to be
   quoted. */
enum mi_cmd_result
mi_cmd_data_assign (char *command, char **argv, int argc)
{
  struct expression *expr;
  struct cleanup *old_chain;

  if (argc != 1)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_assign: Usage: -data-assign expression");
      return MI_CMD_ERROR;
    }

  /* NOTE what follows is a clone of set_command(). FIXME: ezannoni
     01-12-1999: Need to decide what to do with this for libgdb purposes. */

  expr = parse_expression (argv[0]);
  old_chain = make_cleanup (free_current_contents, &expr);
  evaluate_expression (expr);
  do_cleanups (old_chain);
  return MI_CMD_DONE;
}
#endif

/* Evaluate the value of the argument. The argument is an
   expression. If the expression contains spaces it needs to be
   included in double quotes. */
enum mi_cmd_result
mi_cmd_data_evaluate_expression (char *command, char **argv, int argc)
{
  struct expression *expr;
  struct cleanup *old_chain = NULL;
  struct value *val;
  struct ui_stream *stb = NULL;

  stb = ui_out_stream_new (uiout);

  if (argc != 1)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_evaluate_expression: Usage: -data-evaluate-expression expression");
      return MI_CMD_ERROR;
    }

  expr = parse_expression (argv[0]);

  old_chain = make_cleanup (free_current_contents, &expr);

  val = evaluate_expression (expr);

  /* Print the result of the expression evaluation. */
  val_print (VALUE_TYPE (val), VALUE_CONTENTS (val),
	     VALUE_EMBEDDED_OFFSET (val), VALUE_ADDRESS (val),
	     stb->stream, 0, 0, 0, 0);

  ui_out_field_stream (uiout, "value", stb);
  ui_out_stream_delete (stb);

  do_cleanups (old_chain);

  return MI_CMD_DONE;
}

enum mi_cmd_result
mi_cmd_target_download (char *args, int from_tty)
{
  char *run;
  struct cleanup *old_cleanups = NULL;

  run = xstrprintf ("load %s", args);
  old_cleanups = make_cleanup (xfree, run);
  execute_command (run, from_tty);

  do_cleanups (old_cleanups);
  return MI_CMD_DONE;
}

/* Connect to the remote target. */
enum mi_cmd_result
mi_cmd_target_select (char *args, int from_tty)
{
  char *run;
  struct cleanup *old_cleanups = NULL;

  run = xstrprintf ("target %s", args);
  old_cleanups = make_cleanup (xfree, run);

  /* target-select is always synchronous.  once the call has returned
     we know that we are connected. */
  /* NOTE: At present all targets that are connected are also
     (implicitly) talking to a halted target.  In the future this may
     change. */
  execute_command (run, from_tty);

  do_cleanups (old_cleanups);

  /* Issue the completion message here. */
  if (last_async_command)
    fputs_unfiltered (last_async_command, raw_stdout);
  fputs_unfiltered ("^connected", raw_stdout);
  mi_out_put (uiout, raw_stdout);
  mi_out_rewind (uiout);
  fputs_unfiltered ("\n", raw_stdout);
  do_exec_cleanups (ALL_CLEANUPS);
  return MI_CMD_QUIET;
}

/* DATA-MEMORY-READ:

   ADDR: start address of data to be dumped.
   WORD-FORMAT: a char indicating format for the ``word''. See 
   the ``x'' command.
   WORD-SIZE: size of each ``word''; 1,2,4, or 8 bytes
   NR_ROW: Number of rows.
   NR_COL: The number of colums (words per row).
   ASCHAR: (OPTIONAL) Append an ascii character dump to each row.  Use
   ASCHAR for unprintable characters.

   Reads SIZE*NR_ROW*NR_COL bytes starting at ADDR from memory and
   displayes them.  Returns:

   {addr="...",rowN={wordN="..." ,... [,ascii="..."]}, ...}

   Returns: 
   The number of bytes read is SIZE*ROW*COL. */

enum mi_cmd_result
mi_cmd_data_read_memory (char *command, char **argv, int argc)
{
  struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
  CORE_ADDR addr;
  long total_bytes;
  long nr_cols;
  long nr_rows;
  char word_format;
  struct type *word_type;
  long word_size;
  char word_asize;
  char aschar;
  char *mbuf;
  int nr_bytes;
  long offset = 0;
  int optind = 0;
  char *optarg;
  enum opt
    {
      OFFSET_OPT
    };
  static struct mi_opt opts[] =
  {
    {"o", OFFSET_OPT, 1},
    0
  };

  while (1)
    {
      int opt = mi_getopt ("mi_cmd_data_read_memory", argc, argv, opts,
			   &optind, &optarg);
      if (opt < 0)
	break;
      switch ((enum opt) opt)
	{
	case OFFSET_OPT:
	  offset = atol (optarg);
	  break;
	}
    }
  argv += optind;
  argc -= optind;

  if (argc < 5 || argc > 6)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_read_memory: Usage: ADDR WORD-FORMAT WORD-SIZE NR-ROWS NR-COLS [ASCHAR].");
      return MI_CMD_ERROR;
    }

  /* Extract all the arguments. */

  /* Start address of the memory dump. */
  addr = parse_and_eval_address (argv[0]) + offset;
  /* The format character to use when displaying a memory word. See
     the ``x'' command. */
  word_format = argv[1][0];
  /* The size of the memory word. */
  word_size = atol (argv[2]);
  switch (word_size)
    {
    case 1:
      word_type = builtin_type_int8;
      word_asize = 'b';
      break;
    case 2:
      word_type = builtin_type_int16;
      word_asize = 'h';
      break;
    case 4:
      word_type = builtin_type_int32;
      word_asize = 'w';
      break;
    case 8:
      word_type = builtin_type_int64;
      word_asize = 'g';
      break;
    default:
      word_type = builtin_type_int8;
      word_asize = 'b';
    }
  /* The number of rows */
  nr_rows = atol (argv[3]);
  if (nr_rows <= 0)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_read_memory: invalid number of rows.");
      return MI_CMD_ERROR;
    }
  /* number of bytes per row. */
  nr_cols = atol (argv[4]);
  if (nr_cols <= 0)
    {
      mi_error_message = xstrprintf ("mi_cmd_data_read_memory: invalid number of columns.");
      return MI_CMD_ERROR;
    }
  /* The un-printable character when printing ascii. */
  if (argc == 6)
    aschar = *argv[5];
  else
    aschar = 0;

  /* create a buffer and read it in. */
  total_bytes = word_size * nr_rows * nr_cols;
  mbuf = xcalloc (total_bytes, 1);
  make_cleanup (xfree, mbuf);
  nr_bytes = 0;
  while (nr_bytes < total_bytes)
    {
      int error;
      long num = target_read_memory_partial (addr + nr_bytes, mbuf + nr_bytes,
					     total_bytes - nr_bytes,
					     &error);
      if (num <= 0)
	break;
      nr_bytes += num;
    }

  /* output the header information. */
  ui_out_field_core_addr (uiout, "addr", addr);
  ui_out_field_int (uiout, "nr-bytes", nr_bytes);
  ui_out_field_int (uiout, "total-bytes", total_bytes);
  ui_out_field_core_addr (uiout, "next-row", addr + word_size * nr_cols);
  ui_out_field_core_addr (uiout, "prev-row", addr - word_size * nr_cols);
  ui_out_field_core_addr (uiout, "next-page", addr + total_bytes);
  ui_out_field_core_addr (uiout, "prev-page", addr - total_bytes);

  /* Build the result as a two dimentional table. */
  {
    struct ui_stream *stream = ui_out_stream_new (uiout);
    struct cleanup *cleanup_list_memory;
    int row;
    int row_byte;
    cleanup_list_memory = make_cleanup_ui_out_list_begin_end (uiout, "memory");
    for (row = 0, row_byte = 0;
	 row < nr_rows;
	 row++, row_byte += nr_cols * word_size)
      {
	int col;
	int col_byte;
	struct cleanup *cleanup_tuple;
	struct cleanup *cleanup_list_data;
	cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
	ui_out_field_core_addr (uiout, "addr", addr + row_byte);
	/* ui_out_field_core_addr_symbolic (uiout, "saddr", addr + row_byte); */
	cleanup_list_data = make_cleanup_ui_out_list_begin_end (uiout, "data");
	for (col = 0, col_byte = row_byte;
	     col < nr_cols;
	     col++, col_byte += word_size)
	  {
	    if (col_byte + word_size > nr_bytes)
	      {
		ui_out_field_string (uiout, NULL, "N/A");
	      }
	    else
	      {
		ui_file_rewind (stream->stream);
		print_scalar_formatted (mbuf + col_byte, word_type, word_format,
					word_asize, stream->stream);
		ui_out_field_stream (uiout, NULL, stream);
	      }
	  }
	do_cleanups (cleanup_list_data);
	if (aschar)
	  {
	    int byte;
	    ui_file_rewind (stream->stream);
	    for (byte = row_byte; byte < row_byte + word_size * nr_cols; byte++)
	      {
		if (byte >= nr_bytes)
		  {
		    fputc_unfiltered ('X', stream->stream);
		  }
		else if (mbuf[byte] < 32 || mbuf[byte] > 126)
		  {
		    fputc_unfiltered (aschar, stream->stream);
		  }
		else
		  fputc_unfiltered (mbuf[byte], stream->stream);
	      }
	    ui_out_field_stream (uiout, "ascii", stream);
	  }
	do_cleanups (cleanup_tuple);
      }
    ui_out_stream_delete (stream);
    do_cleanups (cleanup_list_memory);
  }
  do_cleanups (cleanups);
  return MI_CMD_DONE;
}

/* DATA-MEMORY-WRITE:

   COLUMN_OFFSET: optional argument. Must be preceeded by '-o'. The
   offset from the beginning of the memory grid row where the cell to
   be written is.
   ADDR: start address of the row in the memory grid where the memory
   cell is, if OFFSET_COLUMN is specified. Otherwise, the address of
   the location to write to.
   FORMAT: a char indicating format for the ``word''. See 
   the ``x'' command.
   WORD_SIZE: size of each ``word''; 1,2,4, or 8 bytes
   VALUE: value to be written into the memory address.

   Writes VALUE into ADDR + (COLUMN_OFFSET * WORD_SIZE).

   Prints nothing. */
enum mi_cmd_result
mi_cmd_data_write_memory (char *command, char **argv, int argc)
{
  CORE_ADDR addr;