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bfd/

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2007-09-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/3281
	PR binutils/5037
	* elf-bfd.h (elf_obj_tdata): Remove relro.

	* elf.c (get_program_header_size): Check info->relro instead
	of elf_tdata (abfd)->relro.
	(_bfd_elf_map_sections_to_segments): Likewise.
	(assign_file_positions_for_load_sections): Don't set
	PT_GNU_RELRO segment alignment here.
	(assign_file_positions_for_non_load_sections): Properly set up
	PT_GNU_RELRO segment for copying executable/shared library.
	(rewrite_elf_program_header): Remove PT_GNU_RELRO segment.
	(copy_elf_program_header): Set p_size and p_size_valid fields for
	PT_GNU_RELRO segment.

include/elf/

2007-09-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/3281
	PR binutils/5037
	* internal.h (elf_segment_map): Add p_size and p_size_valid.
	(ELF_IS_SECTION_IN_SEGMENT): Allow SHF_TLS sections in
	PT_GNU_RELRO segments.

ld/

2007-09-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/3281
	PR binutils/5037
	* ldexp.h (ldexp_control): Add relro, relro_start_stat and
	relro_end_stat.

	* ldexp.c (fold_binary): Set expld.dataseg.relro to
	exp_dataseg_relro_start or exp_dataseg_relro_end when
	seeing DATA_SEGMENT_ALIGN or DATA_SEGMENT_RELRO_END,
	respectively.

	* ldlang.c (lang_size_sections_1): Properly set
	expld.dataseg.relro_start_stat and
	expld.dataseg.relro_end_stat.
	(find_relro_section_callback): New function.
	(lang_find_relro_sections_1): Likewise.
	(lang_find_relro_sections): Likewise.
	(lang_process): Call lang_find_relro_sections for
	non-relocatable link.

ld/testsuite/

2007-09-17  H.J. Lu  <hongjiu.lu@intel.com>

	PR binutils/3281
	PR binutils/5037
	* ld-elf/binutils.exp: Update "-z relro" tests to use relro1.s.
	Add "-z relro" tests with relro2.s.  Add "-z relro" tests with
	TLS for objcopy.

	* ld-elf/relro1.s: New file.
	* ld-elf/relro2.s: Likewise.
This commit is contained in:
H.J. Lu
2007-09-18 00:25:07 +00:00
parent 87dcefc059
commit b10a8ae01c
14 changed files with 284 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
ld/ldlang.c
View File

@ -4636,10 +4636,32 @@ lang_size_sections_1
bfd_vma newdot = dot;
etree_type *tree = s->assignment_statement.exp;
expld.dataseg.relro = exp_dataseg_relro_none;
exp_fold_tree (tree,
output_section_statement->bfd_section,
&newdot);
if (expld.dataseg.relro == exp_dataseg_relro_start)
{
if (!expld.dataseg.relro_start_stat)
expld.dataseg.relro_start_stat = s;
else
{
ASSERT (expld.dataseg.relro_start_stat == s);
}
}
else if (expld.dataseg.relro == exp_dataseg_relro_end)
{
if (!expld.dataseg.relro_end_stat)
expld.dataseg.relro_end_stat = s;
else
{
ASSERT (expld.dataseg.relro_end_stat == s);
}
}
expld.dataseg.relro = exp_dataseg_relro_none;
/* This symbol is relative to this section. */
if ((tree->type.node_class == etree_provided
|| tree->type.node_class == etree_assign)
@ -5665,6 +5687,81 @@ lang_gc_sections (void)
bfd_gc_sections (output_bfd, &link_info);
}
/* Worker for lang_find_relro_sections_1. */
static void
find_relro_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED,
struct wildcard_list *sec ATTRIBUTE_UNUSED,
asection *section,
lang_input_statement_type *file ATTRIBUTE_UNUSED,
void *data)
{
/* Discarded, excluded and ignored sections effectively have zero
size. */
if (section->output_section != NULL
&& section->output_section->owner == output_bfd
&& (section->output_section->flags & SEC_EXCLUDE) == 0
&& !IGNORE_SECTION (section)
&& section->size != 0)
{
bfd_boolean *has_relro_section = (bfd_boolean *) data;
*has_relro_section = TRUE;
}
}
/* Iterate over sections for relro sections. */
static void
lang_find_relro_sections_1 (lang_statement_union_type *s,
bfd_boolean *has_relro_section)
{
if (*has_relro_section)
return;
for (; s != NULL; s = s->header.next)
{
if (s == expld.dataseg.relro_end_stat)
break;
switch (s->header.type)
{
case lang_wild_statement_enum:
walk_wild (&s->wild_statement,
find_relro_section_callback,
has_relro_section);
break;
case lang_constructors_statement_enum:
lang_find_relro_sections_1 (constructor_list.head,
has_relro_section);
break;
case lang_output_section_statement_enum:
lang_find_relro_sections_1 (s->output_section_statement.children.head,
has_relro_section);
break;
case lang_group_statement_enum:
lang_find_relro_sections_1 (s->group_statement.children.head,
has_relro_section);
break;
default:
break;
}
}
}
static void
lang_find_relro_sections (void)
{
bfd_boolean has_relro_section = FALSE;
/* Check all sections in the link script. */
lang_find_relro_sections_1 (expld.dataseg.relro_start_stat,
&has_relro_section);
if (!has_relro_section)
link_info.relro = FALSE;
}
/* Relax all sections until bfd_relax_section gives up. */
static void
@ -5792,6 +5889,10 @@ lang_process (void)
section positions, since they will affect SIZEOF_HEADERS. */
lang_record_phdrs ();
/* Check relro sections. */
if (link_info.relro && ! link_info.relocatable)
lang_find_relro_sections ();
/* Size up the sections. */
lang_size_sections (NULL, !command_line.relax);