Subversion Repositories openrisc_2011-10-31

/* mri.c -- handle MRI style linker scripts

   Copyright 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000, 2001,

   2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.

   Contributed by Steve Chamberlain <sac@cygnus.com>.

   This file is part of the GNU Binutils.

   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, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.  */

/* This bit does the tree decoration when MRI style link scripts

   are parsed.  */

#include "sysdep.h"

#include "bfd.h"

#include "ld.h"

#include "ldexp.h"

#include "ldlang.h"

#include "ldmisc.h"

#include "mri.h"

#include <ldgram.h>

#include "libiberty.h"

struct section_name_struct {

  struct section_name_struct *next;

  const char *name;

  const char *alias;

  etree_type *vma;

  etree_type *align;

  etree_type *subalign;

  int ok_to_load;

};

static unsigned int symbol_truncate = 10000;

static struct section_name_struct *order;

static struct section_name_struct *only_load;

static struct section_name_struct *address;

static struct section_name_struct *alias;

static struct section_name_struct *alignment;

static struct section_name_struct *subalignment;

static struct section_name_struct **

lookup (const char *name, struct section_name_struct **list)

{

  struct section_name_struct **ptr = list;

  while (*ptr)

    {

      if (strcmp (name, (*ptr)->name) == 0)

        /* If this is a match, delete it, we only keep the last instance

           of any name.  */

        *ptr = (*ptr)->next;

      else

        ptr = &((*ptr)->next);

    }

  *ptr = xmalloc (sizeof (struct section_name_struct));

  return ptr;

}

static void

mri_add_to_list (struct section_name_struct **list,

                 const char *name,

                 etree_type *vma,

                 const char *zalias,

                 etree_type *align,

                 etree_type *subalign)

{

  struct section_name_struct **ptr = lookup (name, list);

  (*ptr)->name = name;

  (*ptr)->vma = vma;

  (*ptr)->next = NULL;

  (*ptr)->ok_to_load = 0;

  (*ptr)->alias = zalias;

  (*ptr)->align = align;

  (*ptr)->subalign = subalign;

}

void

mri_output_section (const char *name, etree_type *vma)

{

  mri_add_to_list (&address, name, vma, 0, 0, 0);

}

/* If any ABSOLUTE <name> are in the script, only load those files

   marked thus.  */

void

mri_only_load (const char *name)

{

  mri_add_to_list (&only_load, name, 0, 0, 0, 0);

}

void

mri_base (etree_type *exp)

{

  base = exp;

}

static int done_tree = 0;

void

mri_draw_tree (void)

{

  if (done_tree)

    return;

  /* Now build the statements for the ldlang machine.  */

  /* Attach the addresses of any which have addresses,

     and add the ones not mentioned.  */

  if (address != NULL)

    {

      struct section_name_struct *alist;

      struct section_name_struct *olist;

      if (order == NULL)

        order = address;

      for (alist = address;

           alist != NULL;

           alist = alist->next)

        {

          int done = 0;

          for (olist = order; done == 0 && olist != NULL; olist = olist->next)

            {

              if (strcmp (alist->name, olist->name) == 0)

                {

                  olist->vma = alist->vma;

                  done = 1;

                }

            }

          if (!done)

            {

              /* Add this onto end of order list.  */

              mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0);

            }

        }

    }

  /* If we're only supposed to load a subset of them in, then prune

     the list.  */

  if (only_load != NULL)

    {

      struct section_name_struct *ptr1;

      struct section_name_struct *ptr2;

      if (order == NULL)

        order = only_load;

      /* See if this name is in the list, if it is then we can load it.  */

      for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)

        for (ptr2 = order; ptr2; ptr2 = ptr2->next)

          if (strcmp (ptr2->name, ptr1->name) == 0)

            ptr2->ok_to_load = 1;

    }

  else

    {

      /* No only load list, so everything is ok to load.  */

      struct section_name_struct *ptr;

      for (ptr = order; ptr; ptr = ptr->next)

        ptr->ok_to_load = 1;

    }

  /* Create the order of sections to load.  */

  if (order != NULL)

    {

      /* Been told to output the sections in a certain order.  */

      struct section_name_struct *p = order;

      while (p)

        {

          struct section_name_struct *aptr;

          etree_type *align = 0;

          etree_type *subalign = 0;

          struct wildcard_list *tmp;

          /* See if an alignment has been specified.  */

          for (aptr = alignment; aptr; aptr = aptr->next)

            if (strcmp (aptr->name, p->name) == 0)

              align = aptr->align;

          for (aptr = subalignment; aptr; aptr = aptr->next)

            if (strcmp (aptr->name, p->name) == 0)

              subalign = aptr->subalign;

          if (base == 0)

            base = p->vma ? p->vma : exp_nameop (NAME, ".");

          lang_enter_output_section_statement (p->name, base,

                                               p->ok_to_load ? 0 : noload_section,

                                               align, subalign, NULL, 0);

          base = 0;

          tmp = xmalloc (sizeof *tmp);

          tmp->next = NULL;

          tmp->spec.name = p->name;

          tmp->spec.exclude_name_list = NULL;

          tmp->spec.sorted = none;

          lang_add_wild (NULL, tmp, FALSE);

          /* If there is an alias for this section, add it too.  */

          for (aptr = alias; aptr; aptr = aptr->next)

            if (strcmp (aptr->alias, p->name) == 0)

              {

                tmp = xmalloc (sizeof *tmp);

                tmp->next = NULL;

                tmp->spec.name = aptr->name;

                tmp->spec.exclude_name_list = NULL;

                tmp->spec.sorted = none;

                lang_add_wild (NULL, tmp, FALSE);

              }

          lang_leave_output_section_statement (0, "*default*", NULL, NULL);

          p = p->next;

        }

    }

  done_tree = 1;

}

void

mri_load (const char *name)

{

  base = 0;

  lang_add_input_file (name, lang_input_file_is_file_enum, NULL);

}

void

mri_order (const char *name)

{

  mri_add_to_list (&order, name, 0, 0, 0, 0);

}

void

mri_alias (const char *want, const char *is, int isn)

{

  if (!is)

    {

      char buf[20];

      /* Some sections are digits.  */

      sprintf (buf, "%d", isn);

      is = xstrdup (buf);

      if (is == NULL)

        abort ();

    }

  mri_add_to_list (&alias, is, 0, want, 0, 0);

}

void

mri_name (const char *name)

{

  lang_add_output (name, 1);

}

void

mri_format (const char *name)

{

  if (strcmp (name, "S") == 0)

    lang_add_output_format ("srec", NULL, NULL, 1);

  else if (strcmp (name, "IEEE") == 0)

    lang_add_output_format ("ieee", NULL, NULL, 1);

  else if (strcmp (name, "COFF") == 0)

    lang_add_output_format ("coff-m68k", NULL, NULL, 1);

  else

    einfo (_("%P%F: unknown format type %s\n"), name);

}

void

mri_public (const char *name, etree_type *exp)

{

  lang_add_assignment (exp_assop ('=', name, exp));

}

void

mri_align (const char *name, etree_type *exp)

{

  mri_add_to_list (&alignment, name, 0, 0, exp, 0);

}

void

mri_alignmod (const char *name, etree_type *exp)

{

  mri_add_to_list (&subalignment, name, 0, 0, 0, exp);

}

void

mri_truncate (unsigned int exp)

{

  symbol_truncate = exp;

}