/* mri.c -- handle MRI style linker scripts
  Copyright (C) 1991-2024 Free Software Foundation, Inc.
  Contributed by Steve Chamberlain <[email protected]>.

  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 "bfdlink.h"
#include "ctf-api.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 etree_type *base; /* Relocation base - or null */

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 = (struct section_name_struct *)
     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 ? normal_section : noload_section, 0,
           align, subalign, NULL, 0, 0);
         base = 0;
         tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
         tmp->next = NULL;
         tmp->spec.name = p->name;
         tmp->spec.exclude_name_list = NULL;
         tmp->spec.sorted = none;
         tmp->spec.section_flag_list = NULL;
         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 = (struct wildcard_list *) xmalloc (sizeof *tmp);
               tmp->next = NULL;
               tmp->spec.name = aptr->name;
               tmp->spec.exclude_name_list = NULL;
               tmp->spec.sorted = none;
               tmp->spec.section_flag_list = NULL;
               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
   einfo (_("%F%P: unknown format type %s\n"), name);
}

void
mri_public (const char *name, etree_type *exp)
{
 lang_add_assignment (exp_assign (name, exp, false));
}

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;
}

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