/* Shared library support for RS/6000 (xcoff) object files, for GDB.
   Copyright (C) 1991-1992, 1995-1996, 1999-2001, 2007-2012 Free
   Software Foundation, Inc.
   Contributed by IBM Corporation.

   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 "bfd.h"
#include "xcoffsolib.h"
#include "inferior.h"
#include "gdbcmd.h"
#include "symfile.h"
#include "frame.h"
#include "gdb_regex.h"


/* If ADDR lies in a shared library, return its name.
   Note that returned name points to static data whose content is overwritten
   by each call.  */

char *
xcoff_solib_address (CORE_ADDR addr)
{
  static char *buffer = NULL;
  struct vmap *vp = vmap;

  /* The first vmap entry is for the exec file.  */

  if (vp == NULL)
    return NULL;
  for (vp = vp->nxt; vp; vp = vp->nxt)
    if (vp->tstart <= addr && addr < vp->tend)
      {
	xfree (buffer);
	buffer = xstrprintf ("%s%s%s%s",
			     vp->name,
			     *vp->member ? "(" : "",
			     vp->member,
			     *vp->member ? ")" : "");
	return buffer;
      }
  return NULL;
}

static void solib_info (char *, int);
static void sharedlibrary_command (char *pattern, int from_tty);

static void
solib_info (char *args, int from_tty)
{
  int addr_size = gdbarch_addr_bit (target_gdbarch) / 8;
  struct vmap *vp = vmap;

  /* Check for new shared libraries loaded with load ().  */
  if (! ptid_equal (inferior_ptid, null_ptid))
    xcoff_relocate_symtab (PIDGET (inferior_ptid));

  if (vp == NULL || vp->nxt == NULL)
    {
      printf_unfiltered ("No shared libraries loaded at this time.\n");
      return;
    }

  /* Skip over the first vmap, it is the main program, always loaded.  */
  vp = vp->nxt;

  printf_unfiltered ("Text Range		Data Range		"
		     "Syms	Shared Object Library\n");

  for (; vp != NULL; vp = vp->nxt)
    {
      printf_unfiltered ("0x%s-0x%s	0x%s-0x%s	%s	%s%s%s%s\n",
			 phex (vp->tstart, addr_size),
			 phex (vp->tend, addr_size),
			 phex (vp->dstart, addr_size),
			 phex (vp->dend, addr_size),
			 vp->loaded ? "Yes" : "No ",
			 vp->name,
			 *vp->member ? "(" : "",
			 vp->member,
			 *vp->member ? ")" : "");
    }
}

static void
sharedlibrary_command (char *pattern, int from_tty)
{
  dont_repeat ();

  /* Check for new shared libraries loaded with load ().  */
  if (! ptid_equal (inferior_ptid, null_ptid))
    xcoff_relocate_symtab (PIDGET (inferior_ptid));

  if (pattern)
    {
      char *re_err = re_comp (pattern);

      if (re_err)
	error (_("Invalid regexp: %s"), re_err);
    }

  /* Walk the list of currently loaded shared libraries, and read
     symbols for any that match the pattern --- or any whose symbols
     aren't already loaded, if no pattern was given.  */
  {
    int any_matches = 0;
    int loaded_any_symbols = 0;
    struct vmap *vp = vmap;

    if (!vp)
      return;

    /* skip over the first vmap, it is the main program, always loaded.  */
    for (vp = vp->nxt; vp; vp = vp->nxt)
      if (! pattern
	    || re_exec (vp->name)
	    || (*vp->member && re_exec (vp->member)))
	{
	  any_matches = 1;

	  if (vp->loaded)
	    {
	      if (from_tty)
		printf_unfiltered ("Symbols already loaded for %s\n",
				   vp->name);
	    }
	  else
	    {
	      if (vmap_add_symbols (vp))
		loaded_any_symbols = 1;
	    }
	}

    if (from_tty && pattern && ! any_matches)
      printf_unfiltered
	("No loaded shared libraries match the pattern `%s'.\n", pattern);

    if (loaded_any_symbols)
      {
	/* Getting new symbols may change our opinion about what is
	   frameless.  */
	reinit_frame_cache ();
      }
  }
}

void _initialize_xcoffsolib (void);

void
_initialize_xcoffsolib (void)
{
  add_com ("sharedlibrary", class_files, sharedlibrary_command,
	   _("Load shared object library symbols for files matching REGEXP."));
  add_info ("sharedlibrary", solib_info,
	    _("Status of loaded shared object libraries"));

  add_setshow_boolean_cmd ("auto-solib-add", class_support,
			   &auto_solib_add, _("\
Set autoloading of shared library symbols."), _("\
Show autoloading of shared library symbols."), _("\
If \"on\", symbols from all shared object libraries will be loaded\n\
automatically when the inferior begins execution, when the dynamic linker\n\
informs gdb that a new library has been loaded, or when attaching to the\n\
inferior.  Otherwise, symbols must be loaded manually, using \
`sharedlibrary'."),
			   NULL,
			   NULL, /* FIXME: i18n: */
			   &setlist, &showlist);
}