+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.
+
2007-09-17 Nick Clifton <nickc@redhat.com>
* po/fi.po: New Finnish translation.
/* Segment flags for the PT_GNU_STACK segment. */
unsigned int stack_flags;
- /* Should the PT_GNU_RELRO segment be emitted? */
- bfd_boolean relro;
-
/* Symbol version definitions in external objects. */
Elf_Internal_Verdef *verdef;
/* We need a PT_DYNAMIC segment. */
++segs;
- if (elf_tdata (abfd)->relro)
+ if (info->relro)
{
/* We need a PT_GNU_RELRO segment only when there is a
PT_DYNAMIC segment. */
pm = &m->next;
}
- if (dynsec != NULL && elf_tdata (abfd)->relro)
+ if (dynsec != NULL && info->relro)
{
/* We make a PT_GNU_RELRO segment only when there is a
PT_DYNAMIC segment. */
p->p_memsz += this_hdr->sh_size;
}
- if (p->p_type == PT_GNU_RELRO)
- p->p_align = 1;
- else if (align > p->p_align
- && !m->p_align_valid
- && (p->p_type != PT_LOAD
- || (abfd->flags & D_PAGED) == 0))
+ if (align > p->p_align
+ && !m->p_align_valid
+ && (p->p_type != PT_LOAD
+ || (abfd->flags & D_PAGED) == 0))
p->p_align = align;
}
if (m->count != 0)
{
if (p->p_type != PT_LOAD
- && (p->p_type != PT_NOTE || bfd_get_format (abfd) != bfd_core))
+ && (p->p_type != PT_NOTE
+ || bfd_get_format (abfd) != bfd_core))
{
Elf_Internal_Shdr *hdr;
+ asection *sect;
+
BFD_ASSERT (!m->includes_filehdr && !m->includes_phdrs);
- hdr = &elf_section_data (m->sections[m->count - 1])->this_hdr;
- p->p_filesz = (m->sections[m->count - 1]->filepos
- - m->sections[0]->filepos);
+ sect = m->sections[m->count - 1];
+ hdr = &elf_section_data (sect)->this_hdr;
+ p->p_filesz = sect->filepos - m->sections[0]->filepos;
if (hdr->sh_type != SHT_NOBITS)
p->p_filesz += hdr->sh_size;
- p->p_offset = m->sections[0]->filepos;
+ if (p->p_type == PT_GNU_RELRO)
+ {
+ /* When we get here, we are copying executable
+ or shared library. But we need to use the same
+ linker logic. */
+ Elf_Internal_Phdr *lp;
+
+ for (lp = phdrs; lp < phdrs + count; ++lp)
+ {
+ if (lp->p_type == PT_LOAD
+ && lp->p_paddr == p->p_paddr)
+ break;
+ }
+
+ if (lp < phdrs + count)
+ {
+ /* We should use p_size if it is valid since it
+ may contain the first few bytes of the next
+ SEC_ALLOC section. */
+ if (m->p_size_valid)
+ p->p_filesz = m->p_size;
+ else
+ abort ();
+ p->p_vaddr = lp->p_vaddr;
+ p->p_offset = lp->p_offset;
+ p->p_memsz = p->p_filesz;
+ p->p_align = 1;
+ }
+ else
+ abort ();
+ }
+ else
+ p->p_offset = m->sections[0]->filepos;
}
}
else
}
if (segment->p_type != PT_LOAD)
- continue;
+ {
+ /* Remove PT_GNU_RELRO segment. */
+ if (segment->p_type == PT_GNU_RELRO)
+ segment->p_type = PT_NULL;
+ continue;
+ }
/* Determine if this segment overlaps any previous segments. */
for (j = 0, segment2 = elf_tdata (ibfd)->phdr; j < i; j++, segment2 ++)
map->p_align_valid = 1;
map->p_vaddr_offset = 0;
+ if (map->p_type == PT_GNU_RELRO
+ && segment->p_filesz == segment->p_memsz)
+ {
+ /* The PT_GNU_RELRO segment may contain the first a few
+ bytes in the .got.plt section even if the whole .got.plt
+ section isn't in the PT_GNU_RELRO segment. We won't
+ change the size of the PT_GNU_RELRO segment. */
+ map->p_size = segment->p_filesz;
+ map->p_size_valid = 1;
+ }
+
/* Determine if this segment contains the ELF file header
and if it contains the program headers themselves. */
map->includes_filehdr = (segment->p_offset == 0
return TRUE;
bed = get_elf_backend_data (output_bfd);
- elf_tdata (output_bfd)->relro = info->relro;
if (info->execstack)
elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
else if (info->noexecstack)
+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.
+
2007-09-11 Nathan Sidwell <nathan@codesourcery.com>
* m68k.h (EF_M68K_CF_ISA_C_NODIV): New.
bfd_vma p_vaddr_offset;
/* Program segment alignment. */
bfd_vma p_align;
+ /* Segment size in file and memory */
+ bfd_vma p_size;
/* Whether the p_flags field is valid; if not, the flags are based
on the section flags. */
unsigned int p_flags_valid : 1;
/* Whether the p_align field is valid; if not, PT_LOAD segment
alignment is based on the default maximum page size. */
unsigned int p_align_valid : 1;
+ /* Whether the p_size field is valid; if not, the size are based
+ on the section sizes. */
+ unsigned int p_size_valid : 1;
/* Whether this segment includes the file header. */
unsigned int includes_filehdr : 1;
/* Whether this segment includes the program headers. */
|| segment->p_type == PT_TLS) ? sec_hdr->sh_size : 0)
/* Decide if the given sec_hdr is in the given segment. PT_TLS segment
- contains only SHF_TLS sections. Only PT_LOAD and PT_TLS segments
- can contain SHF_TLS sections. */
+ contains only SHF_TLS sections. Only PT_LOAD, PT_GNU_RELRO and
+ and PT_TLS segments can contain SHF_TLS sections. */
#define ELF_IS_SECTION_IN_SEGMENT(sec_hdr, segment) \
(((((sec_hdr->sh_flags & SHF_TLS) != 0) \
&& (segment->p_type == PT_TLS \
+ || segment->p_type == PT_GNU_RELRO \
|| segment->p_type == PT_LOAD)) \
|| ((sec_hdr->sh_flags & SHF_TLS) == 0 \
&& segment->p_type != PT_TLS)) \
+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.
+
2007-09-17 Nick Clifton <nickc@redhat.com>
* po/es.po: Updated Spanish translation.
break;
case DATA_SEGMENT_ALIGN:
+ expld.dataseg.relro = exp_dataseg_relro_start;
if (expld.phase != lang_first_phase_enum
&& expld.section == bfd_abs_section_ptr
&& (expld.dataseg.phase == exp_dataseg_none
break;
case DATA_SEGMENT_RELRO_END:
+ expld.dataseg.relro = exp_dataseg_relro_end;
if (expld.phase != lang_first_phase_enum
&& (expld.dataseg.phase == exp_dataseg_align_seen
|| expld.dataseg.phase == exp_dataseg_adjust
lang_final_phase_enum
} lang_phase_type;
+union lang_statement_union;
+
struct ldexp_control {
/* Modify expression evaluation depending on this. */
lang_phase_type phase;
} phase;
bfd_vma base, min_base, relro_end, end, pagesize, maxpagesize;
+
+ enum {
+ exp_dataseg_relro_none,
+ exp_dataseg_relro_start,
+ exp_dataseg_relro_end,
+ } relro;
+
+ union lang_statement_union *relro_start_stat;
+ union lang_statement_union *relro_end_stat;
} dataseg;
};
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)
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
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);
+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.
+
2007-09-04 Mike Frysinger <vapier@gentoo.org>
* lib/ld-lib.exp (default_ld_compile): Pull in global CXXFLAGS and
binutils_test objcopy "" maxpage1
binutils_test objcopy "-shared" maxpage1
-binutils_test strip "-z relro" maxpage1
-binutils_test strip "-z relro -shared" maxpage1
-binutils_test objcopy "-z relro" maxpage1
-binutils_test objcopy "-z relro -shared" maxpage1
+binutils_test strip "-z relro" relro1
+binutils_test strip "-z relro -shared" relro1
+binutils_test objcopy "-z relro" relro1
+binutils_test objcopy "-z relro -shared" relro1
+if { ([istarget "i?86-*-elf*"]
+ || ([istarget "i?86-*-linux*"]
+ && ![istarget "*-*-*aout*"]
+ && ![istarget "*-*-*oldld*"])
+ || [istarget "x86_64-*-linux*"]
+ || [istarget "amd64-*-linux*"]) } {
+ binutils_test strip "-z relro -shared" relro2
+ binutils_test objcopy "-z relro -shared" relro2
+}
binutils_test objcopy "" tbss1
+binutils_test objcopy "-z relro" tbss1
binutils_test objcopy "-shared" tbss1
+binutils_test objcopy "-shared -z relro" tbss1
binutils_test objcopy "-z max-page-size=0x100000" tbss1
binutils_test objcopy "-z max-page-size=0x100000 -z common-page-size=0x1000" tbss1
binutils_test objcopy "" tdata1
+binutils_test objcopy "-z relro" tdata1
binutils_test objcopy "-shared" tdata1
+binutils_test objcopy "-shared -z relro" tdata1
binutils_test objcopy "-z max-page-size=0x100000" tdata1
binutils_test objcopy "-z max-page-size=0x100000 -z common-page-size=0x1000" tdata1
binutils_test objcopy "" tbss2
+binutils_test objcopy "-z relro" tbss2
binutils_test objcopy "-shared" tbss2
+binutils_test objcopy "-shared -z relro" tbss2
binutils_test objcopy "-z max-page-size=0x100000" tbss2
binutils_test objcopy "-z max-page-size=0x100000 -z common-page-size=0x1000" tbss2
-binutils_test objcopy "-z max-page-size=0x100000" tdata2
+
binutils_test objcopy "" tdata2
+binutils_test objcopy "-z relro" tdata2
binutils_test objcopy "-shared" tdata2
+binutils_test objcopy "-shared -z relro" tdata2
+binutils_test objcopy "-z max-page-size=0x100000" tdata2
binutils_test objcopy "-z max-page-size=0x100000 -z common-page-size=0x1000" tdata2
--- /dev/null
+ .globl main
+ .globl start
+ .globl _start
+ .globl __start
+ .text
+main:
+start:
+_start:
+__start:
+ .long 0
+ .data
+ .long 0
+ .section .data.rel.ro,"aw",%progbits
+ .long 0
--- /dev/null
+ .text
+ .globl x
+ .type x, @function
+x:
+ jmp foo@PLT
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