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/* Handle COFF SVR3 shared libraries for GDB, the GNU Debugger.

   Copyright 1993 Free Software Foundation, Inc.

   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 2 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, write to the Free Software

   Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "frame.h"

#include "bfd.h"

#include "gdbcore.h"

#include "symtab.h"

/*

   GLOBAL FUNCTION

   coff_solib_add -- add a shared library files to the symtab list.  We

   examine the `.lib' section of the exec file and determine the names of

   the shared libraries.

   This function is responsible for discovering those names and

   addresses, and saving sufficient information about them to allow

   their symbols to be read at a later time.

   SYNOPSIS

   void coff_solib_add (char *arg_string, int from_tty,

   struct target_ops *target)

   DESCRIPTION

 */

void

coff_solib_add (arg_string, from_tty, target)

     char *arg_string;

     int from_tty;

     struct target_ops *target;

{

  asection *libsect;

  libsect = bfd_get_section_by_name (exec_bfd, ".lib");

  if (libsect)

    {

      int libsize;

      unsigned char *lib;

      struct libent

        {

          bfd_byte len[4];

          bfd_byte nameoffset[4];

        };

      libsize = bfd_section_size (exec_bfd, libsect);

      lib = (unsigned char *) alloca (libsize);

      bfd_get_section_contents (exec_bfd, libsect, lib, 0, libsize);

      while (libsize > 0)

        {

          struct libent *ent;

          struct objfile *objfile;

          int len, nameoffset;

          char *filename;

          ent = (struct libent *) lib;

          len = bfd_get_32 (exec_bfd, ent->len);

          nameoffset = bfd_get_32 (exec_bfd, ent->nameoffset);

          if (len <= 0)

            break;

          filename = (char *) ent + nameoffset * 4;

          objfile = symbol_file_add (filename, from_tty,

                                     NULL,      /* no offsets */

                                     0,          /* not mainline */

                                     OBJF_SHARED);      /* flags */

          libsize -= len * 4;

          lib += len * 4;

        }

      /* Getting new symbols may change our opinion about what is

         frameless.  */

      reinit_frame_cache ();

    }

}

/*

   GLOBAL FUNCTION

   coff_solib_create_inferior_hook -- shared library startup support

   SYNOPSIS

   void coff_solib_create_inferior_hook()

   DESCRIPTION

   When gdb starts up the inferior, the kernel maps in the shared

   libraries.  We get here with the target stopped at it's first

   instruction, and the libraries already mapped.  At this      point, this

   function gets called via expansion of the macro

   SOLIB_CREATE_INFERIOR_HOOK.

 */

void

coff_solib_create_inferior_hook ()

{

  coff_solib_add ((char *) 0, 0, (struct target_ops *) 0);

}