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

Copyright (C) 1991-2016 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 {

};

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,

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,

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 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_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;

}