317 lines
7.2 KiB
C
317 lines
7.2 KiB
C
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/* mri.c -- handle MRI style linker scripts
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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Contributed by Steve Chamberlain <sac@cygnus.com>.
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* This bit does the tree decoration when MRI style link scripts
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are parsed. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "bfdlink.h"
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#include "ctf-api.h"
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#include "ld.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldmisc.h"
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#include "mri.h"
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#include <ldgram.h>
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#include "libiberty.h"
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struct section_name_struct {
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struct section_name_struct *next;
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const char *name;
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const char *alias;
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etree_type *vma;
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etree_type *align;
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etree_type *subalign;
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int ok_to_load;
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};
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static unsigned int symbol_truncate = 10000;
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static etree_type *base; /* Relocation base - or null */
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static struct section_name_struct *order;
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static struct section_name_struct *only_load;
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static struct section_name_struct *address;
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static struct section_name_struct *alias;
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static struct section_name_struct *alignment;
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static struct section_name_struct *subalignment;
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static struct section_name_struct **
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lookup (const char *name, struct section_name_struct **list)
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{
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struct section_name_struct **ptr = list;
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while (*ptr)
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{
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if (strcmp (name, (*ptr)->name) == 0)
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/* If this is a match, delete it, we only keep the last instance
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of any name. */
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*ptr = (*ptr)->next;
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else
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ptr = &((*ptr)->next);
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}
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*ptr = (struct section_name_struct *)
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xmalloc (sizeof (struct section_name_struct));
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return ptr;
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}
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static void
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mri_add_to_list (struct section_name_struct **list,
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const char *name,
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etree_type *vma,
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const char *zalias,
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etree_type *align,
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etree_type *subalign)
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{
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struct section_name_struct **ptr = lookup (name, list);
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(*ptr)->name = name;
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(*ptr)->vma = vma;
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(*ptr)->next = NULL;
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(*ptr)->ok_to_load = 0;
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(*ptr)->alias = zalias;
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(*ptr)->align = align;
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(*ptr)->subalign = subalign;
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}
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void
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mri_output_section (const char *name, etree_type *vma)
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{
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mri_add_to_list (&address, name, vma, 0, 0, 0);
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}
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/* If any ABSOLUTE <name> are in the script, only load those files
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marked thus. */
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void
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mri_only_load (const char *name)
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{
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mri_add_to_list (&only_load, name, 0, 0, 0, 0);
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}
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void
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mri_base (etree_type *exp)
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{
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base = exp;
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}
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static int done_tree = 0;
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void
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mri_draw_tree (void)
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{
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if (done_tree)
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return;
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/* Now build the statements for the ldlang machine. */
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/* Attach the addresses of any which have addresses,
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and add the ones not mentioned. */
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if (address != NULL)
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{
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struct section_name_struct *alist;
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struct section_name_struct *olist;
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if (order == NULL)
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order = address;
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for (alist = address;
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alist != NULL;
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alist = alist->next)
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{
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int done = 0;
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for (olist = order; done == 0 && olist != NULL; olist = olist->next)
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{
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if (strcmp (alist->name, olist->name) == 0)
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{
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olist->vma = alist->vma;
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done = 1;
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}
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}
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if (!done)
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{
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/* Add this onto end of order list. */
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mri_add_to_list (&order, alist->name, alist->vma, 0, 0, 0);
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}
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}
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}
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/* If we're only supposed to load a subset of them in, then prune
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the list. */
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if (only_load != NULL)
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{
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struct section_name_struct *ptr1;
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struct section_name_struct *ptr2;
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if (order == NULL)
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order = only_load;
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/* See if this name is in the list, if it is then we can load it. */
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for (ptr1 = only_load; ptr1; ptr1 = ptr1->next)
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for (ptr2 = order; ptr2; ptr2 = ptr2->next)
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if (strcmp (ptr2->name, ptr1->name) == 0)
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ptr2->ok_to_load = 1;
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}
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else
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{
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/* No only load list, so everything is ok to load. */
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struct section_name_struct *ptr;
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for (ptr = order; ptr; ptr = ptr->next)
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ptr->ok_to_load = 1;
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}
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/* Create the order of sections to load. */
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if (order != NULL)
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{
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/* Been told to output the sections in a certain order. */
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struct section_name_struct *p = order;
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while (p)
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{
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struct section_name_struct *aptr;
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etree_type *align = 0;
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etree_type *subalign = 0;
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struct wildcard_list *tmp;
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/* See if an alignment has been specified. */
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for (aptr = alignment; aptr; aptr = aptr->next)
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if (strcmp (aptr->name, p->name) == 0)
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align = aptr->align;
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for (aptr = subalignment; aptr; aptr = aptr->next)
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if (strcmp (aptr->name, p->name) == 0)
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subalign = aptr->subalign;
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if (base == 0)
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base = p->vma ? p->vma : exp_nameop (NAME, ".");
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lang_enter_output_section_statement (p->name, base,
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p->ok_to_load ? normal_section : noload_section, 0,
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align, subalign, NULL, 0, 0);
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base = 0;
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tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
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tmp->next = NULL;
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tmp->spec.name = p->name;
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tmp->spec.exclude_name_list = NULL;
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tmp->spec.sorted = none;
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tmp->spec.section_flag_list = NULL;
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lang_add_wild (NULL, tmp, false);
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/* If there is an alias for this section, add it too. */
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for (aptr = alias; aptr; aptr = aptr->next)
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if (strcmp (aptr->alias, p->name) == 0)
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{
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tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
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tmp->next = NULL;
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tmp->spec.name = aptr->name;
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tmp->spec.exclude_name_list = NULL;
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tmp->spec.sorted = none;
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tmp->spec.section_flag_list = NULL;
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lang_add_wild (NULL, tmp, false);
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}
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lang_leave_output_section_statement (0, "*default*", NULL, NULL);
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p = p->next;
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}
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}
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done_tree = 1;
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}
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void
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mri_load (const char *name)
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{
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base = 0;
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lang_add_input_file (name, lang_input_file_is_file_enum, NULL);
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}
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void
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mri_order (const char *name)
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{
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mri_add_to_list (&order, name, 0, 0, 0, 0);
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}
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void
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mri_alias (const char *want, const char *is, int isn)
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{
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if (!is)
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{
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char buf[20];
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/* Some sections are digits. */
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sprintf (buf, "%d", isn);
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is = xstrdup (buf);
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if (is == NULL)
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abort ();
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}
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mri_add_to_list (&alias, is, 0, want, 0, 0);
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}
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void
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mri_name (const char *name)
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{
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lang_add_output (name, 1);
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}
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void
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mri_format (const char *name)
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{
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if (strcmp (name, "S") == 0)
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lang_add_output_format ("srec", NULL, NULL, 1);
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else
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einfo (_("%F%P: unknown format type %s\n"), name);
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}
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void
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mri_public (const char *name, etree_type *exp)
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{
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lang_add_assignment (exp_assign (name, exp, false));
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}
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void
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mri_align (const char *name, etree_type *exp)
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{
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mri_add_to_list (&alignment, name, 0, 0, exp, 0);
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}
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void
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mri_alignmod (const char *name, etree_type *exp)
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{
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mri_add_to_list (&subalignment, name, 0, 0, 0, exp);
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}
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void
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mri_truncate (unsigned int exp)
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{
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symbol_truncate = exp;
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}
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