binutils-gdb/ld/mri.c

321 lines
7.3 KiB
C

/* mri.c -- handle MRI style linker scripts
Copyright (C) 1991-2015 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 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,
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;
}