/* simple.c -- BFD simple client routines
- Copyright 2002
- Free Software Foundation, Inc.
+ Copyright (C) 2002-2020 Free Software Foundation, Inc.
Contributed by MontaVista Software, Inc.
This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
+ 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,
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "bfdlink.h"
-static boolean simple_dummy_warning
- PARAMS ((struct bfd_link_info * ATTRIBUTE_UNUSED,
- const char * ATTRIBUTE_UNUSED, const char * ATTRIBUTE_UNUSED,
- bfd * ATTRIBUTE_UNUSED, asection * ATTRIBUTE_UNUSED,
- bfd_vma ATTRIBUTE_UNUSED));
-
-static boolean simple_dummy_undefined_symbol
- PARAMS ((struct bfd_link_info * ATTRIBUTE_UNUSED,
- const char * ATTRIBUTE_UNUSED, bfd * ATTRIBUTE_UNUSED,
- asection * ATTRIBUTE_UNUSED, bfd_vma ATTRIBUTE_UNUSED,
- boolean ATTRIBUTE_UNUSED));
-
-static boolean simple_dummy_reloc_overflow
- PARAMS ((struct bfd_link_info * ATTRIBUTE_UNUSED,
- const char * ATTRIBUTE_UNUSED, const char * ATTRIBUTE_UNUSED,
- bfd_vma ATTRIBUTE_UNUSED, bfd * ATTRIBUTE_UNUSED,
- asection * ATTRIBUTE_UNUSED, bfd_vma ATTRIBUTE_UNUSED));
-
-static boolean simple_dummy_reloc_dangerous
- PARAMS ((struct bfd_link_info * ATTRIBUTE_UNUSED,
- const char * ATTRIBUTE_UNUSED, bfd * ATTRIBUTE_UNUSED,
- asection * ATTRIBUTE_UNUSED, bfd_vma ATTRIBUTE_UNUSED));
-
-static boolean simple_dummy_unattached_reloc
- PARAMS ((struct bfd_link_info * ATTRIBUTE_UNUSED,
- const char * ATTRIBUTE_UNUSED, bfd * ATTRIBUTE_UNUSED,
- asection * ATTRIBUTE_UNUSED, bfd_vma ATTRIBUTE_UNUSED));
-
-bfd_byte * bfd_simple_get_relocated_section_contents
- PARAMS ((bfd *, asection *, bfd_byte *));
-
-static boolean
-simple_dummy_warning (link_info, warning, symbol, abfd, section, address)
- struct bfd_link_info *link_info;
- const char *warning;
- const char *symbol;
- bfd *abfd;
- asection *section;
- bfd_vma address;
+static void
+simple_dummy_warning (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ const char *warning ATTRIBUTE_UNUSED,
+ const char *symbol ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section ATTRIBUTE_UNUSED,
+ bfd_vma address ATTRIBUTE_UNUSED)
+{
+}
+
+static void
+simple_dummy_undefined_symbol (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ const char *name ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section ATTRIBUTE_UNUSED,
+ bfd_vma address ATTRIBUTE_UNUSED,
+ bfd_boolean fatal ATTRIBUTE_UNUSED)
{
- return true;
}
-static boolean
-simple_dummy_undefined_symbol (link_info, name, abfd, section, address, fatal)
- struct bfd_link_info *link_info;
- const char *name;
- bfd *abfd;
- asection *section;
- bfd_vma address;
- boolean fatal;
+static void
+simple_dummy_reloc_overflow (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ struct bfd_link_hash_entry *entry ATTRIBUTE_UNUSED,
+ const char *name ATTRIBUTE_UNUSED,
+ const char *reloc_name ATTRIBUTE_UNUSED,
+ bfd_vma addend ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section ATTRIBUTE_UNUSED,
+ bfd_vma address ATTRIBUTE_UNUSED)
{
- return true;
}
-static boolean
-simple_dummy_reloc_overflow (link_info, name, reloc_name, addend, abfd,
- section, address)
- struct bfd_link_info *link_info;
- const char *name;
- const char *reloc_name;
- bfd_vma addend;
- bfd *abfd;
- asection *section;
- bfd_vma address;
+static void
+simple_dummy_reloc_dangerous (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ const char *message ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section ATTRIBUTE_UNUSED,
+ bfd_vma address ATTRIBUTE_UNUSED)
{
- return true;
}
-static boolean
-simple_dummy_reloc_dangerous (link_info, message, abfd, section, address)
- struct bfd_link_info *link_info;
- const char *message;
- bfd *abfd;
- asection *section;
- bfd_vma address;
+static void
+simple_dummy_unattached_reloc (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ const char *name ATTRIBUTE_UNUSED,
+ bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section ATTRIBUTE_UNUSED,
+ bfd_vma address ATTRIBUTE_UNUSED)
{
- return true;
}
-static boolean
-simple_dummy_unattached_reloc (link_info, name, abfd, section, address)
- struct bfd_link_info *link_info;
- const char *name;
- bfd *abfd;
- asection *section;
- bfd_vma address;
+static void
+simple_dummy_multiple_definition (struct bfd_link_info *link_info ATTRIBUTE_UNUSED,
+ struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
+ bfd *nbfd ATTRIBUTE_UNUSED,
+ asection *nsec ATTRIBUTE_UNUSED,
+ bfd_vma nval ATTRIBUTE_UNUSED)
{
- return true;
+}
+
+static void
+simple_dummy_einfo (const char *fmt ATTRIBUTE_UNUSED, ...)
+{
+}
+
+struct saved_output_info
+{
+ bfd_vma offset;
+ asection *section;
+};
+
+struct saved_offsets
+{
+ unsigned int section_count;
+ struct saved_output_info *sections;
+};
+
+/* The sections in ABFD may already have output sections and offsets
+ set if we are here during linking.
+
+ DWARF-2 specifies offsets into debug sections in many cases and
+ bfd_simple_get_relocated_section_contents is called to relocate
+ debug info for a single relocatable object file. So we want
+ offsets relative to that object file's sections, not offsets in the
+ output file. For that reason, reset a debug section->output_offset
+ to zero.
+
+ If not called during linking then set section->output_section to
+ point back to the input section, because output_section must not be
+ NULL when calling the relocation routines.
+
+ Save the original output offset and section to restore later. */
+
+static void
+simple_save_output_info (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section,
+ void *ptr)
+{
+ struct saved_offsets *saved_offsets = (struct saved_offsets *) ptr;
+ struct saved_output_info *output_info;
+
+ output_info = &saved_offsets->sections[section->index];
+ output_info->offset = section->output_offset;
+ output_info->section = section->output_section;
+ if ((section->flags & SEC_DEBUGGING) != 0
+ || section->output_section == NULL)
+ {
+ section->output_offset = 0;
+ section->output_section = section;
+ }
+}
+
+static void
+simple_restore_output_info (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *section,
+ void *ptr)
+{
+ struct saved_offsets *saved_offsets = (struct saved_offsets *) ptr;
+ struct saved_output_info *output_info;
+
+ if (section->index >= saved_offsets->section_count)
+ return;
+
+ output_info = &saved_offsets->sections[section->index];
+ section->output_offset = output_info->offset;
+ section->output_section = output_info->section;
}
/*
bfd_simple_relocate_secton
SYNOPSIS
- bfd_byte *bfd_simple_get_relocated_section_contents (bfd *abfd, asection *sec, bfd_byte *outbuf);
+ bfd_byte *bfd_simple_get_relocated_section_contents
+ (bfd *abfd, asection *sec, bfd_byte *outbuf, asymbol **symbol_table);
DESCRIPTION
- Returns the relocated contents of section @var{sec}. Only symbols
- from @var{abfd} and the output offsets assigned to sections in
- @var{abfd} are used. The result will be stored at @var{outbuf}
+ Returns the relocated contents of section @var{sec}. The symbols in
+ @var{symbol_table} will be used, or the symbols from @var{abfd} if
+ @var{symbol_table} is NULL. The output offsets for debug sections will
+ be temporarily reset to 0. The result will be stored at @var{outbuf}
or allocated with @code{bfd_malloc} if @var{outbuf} is @code{NULL}.
- Generally all sections in @var{abfd} should have their
- @code{output_section} pointing back to the original section.
-
Returns @code{NULL} on a fatal error; ignores errors applying
particular relocations.
*/
bfd_byte *
-bfd_simple_get_relocated_section_contents (abfd, sec, outbuf)
- bfd *abfd;
- asection *sec;
- bfd_byte *outbuf;
+bfd_simple_get_relocated_section_contents (bfd *abfd,
+ asection *sec,
+ bfd_byte *outbuf,
+ asymbol **symbol_table)
{
struct bfd_link_info link_info;
struct bfd_link_order link_order;
struct bfd_link_callbacks callbacks;
bfd_byte *contents, *data;
- int storage_needed, number_of_symbols;
- asymbol **symbol_table;
+ int storage_needed;
+ struct saved_offsets saved_offsets;
+ bfd *link_next;
+
+ /* Don't apply relocation on executable and shared library. See
+ PR 4756. */
+ if ((abfd->flags & (HAS_RELOC | EXEC_P | DYNAMIC)) != HAS_RELOC
+ || ! (sec->flags & SEC_RELOC))
+ {
+ contents = outbuf;
+ if (!bfd_get_full_section_contents (abfd, sec, &contents))
+ return NULL;
+ return contents;
+ }
/* In order to use bfd_get_relocated_section_contents, we need
to forge some data structures that it expects. */
/* Fill in the bare minimum number of fields for our purposes. */
memset (&link_info, 0, sizeof (link_info));
+ link_info.output_bfd = abfd;
link_info.input_bfds = abfd;
+ link_info.input_bfds_tail = &abfd->link.next;
- link_info.hash = bfd_link_hash_table_create (abfd);
+ link_next = abfd->link.next;
+ abfd->link.next = NULL;
+ link_info.hash = _bfd_generic_link_hash_table_create (abfd);
link_info.callbacks = &callbacks;
callbacks.warning = simple_dummy_warning;
callbacks.undefined_symbol = simple_dummy_undefined_symbol;
callbacks.reloc_overflow = simple_dummy_reloc_overflow;
callbacks.reloc_dangerous = simple_dummy_reloc_dangerous;
callbacks.unattached_reloc = simple_dummy_unattached_reloc;
+ callbacks.multiple_definition = simple_dummy_multiple_definition;
+ callbacks.einfo = simple_dummy_einfo;
memset (&link_order, 0, sizeof (link_order));
link_order.next = NULL;
link_order.type = bfd_indirect_link_order;
link_order.offset = 0;
- link_order.size = bfd_section_size (abfd, sec);
+ link_order.size = sec->size;
link_order.u.indirect.section = sec;
data = NULL;
if (outbuf == NULL)
{
- data = bfd_malloc (bfd_section_size (abfd, sec));
+ bfd_size_type amt = sec->rawsize > sec->size ? sec->rawsize : sec->size;
+ data = (bfd_byte *) bfd_malloc (amt);
if (data == NULL)
- return NULL;
+ {
+ _bfd_generic_link_hash_table_free (abfd);
+ abfd->link.next = link_next;
+ return NULL;
+ }
outbuf = data;
}
- bfd_link_add_symbols (abfd, &link_info);
- storage_needed = bfd_get_symtab_upper_bound (abfd);
- symbol_table = (asymbol **) bfd_malloc (storage_needed);
- number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
+ saved_offsets.section_count = abfd->section_count;
+ saved_offsets.sections = malloc (sizeof (*saved_offsets.sections)
+ * saved_offsets.section_count);
+ if (saved_offsets.sections == NULL)
+ {
+ if (data)
+ free (data);
+ _bfd_generic_link_hash_table_free (abfd);
+ abfd->link.next = link_next;
+ return NULL;
+ }
+ bfd_map_over_sections (abfd, simple_save_output_info, &saved_offsets);
+
+ if (symbol_table == NULL)
+ {
+ _bfd_generic_link_add_symbols (abfd, &link_info);
+
+ storage_needed = bfd_get_symtab_upper_bound (abfd);
+ symbol_table = (asymbol **) bfd_malloc (storage_needed);
+ bfd_canonicalize_symtab (abfd, symbol_table);
+ }
+ else
+ storage_needed = 0;
contents = bfd_get_relocated_section_contents (abfd,
&link_info,
if (contents == NULL && data != NULL)
free (data);
- /* Foul hack to prevent bfd_section_size aborts. This flag only controls
- that macro (and the related size macros), selecting between _raw_size
- and _cooked_size. Debug sections won't change size while we're only
- relocating. There may be trouble here someday if it tries to run
- relaxation unexpectedly, so make sure. */
- BFD_ASSERT (sec->_raw_size == sec->_cooked_size);
- sec->reloc_done = 0;
-
- bfd_link_hash_table_free (abfd, link_info.hash);
+ bfd_map_over_sections (abfd, simple_restore_output_info, &saved_offsets);
+ free (saved_offsets.sections);
+ _bfd_generic_link_hash_table_free (abfd);
+ abfd->link.next = link_next;
return contents;
}