return TRUE;
}
+bfd_boolean
+bfd_elf_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, const asection *sec)
+{
+ return elf_next_in_group (sec) != NULL;
+}
+
bfd_boolean
bfd_elf_discard_group (bfd *abfd ATTRIBUTE_UNUSED, asection *group)
{
if (newsect == NULL)
return FALSE;
+ hdr->bfd_section = newsect;
+ elf_section_data (newsect)->this_hdr = *hdr;
+
/* Always use the real type/flags. */
elf_section_type (newsect) = hdr->sh_type;
elf_section_flags (newsect) = hdr->sh_flags;
}
}
- hdr->bfd_section = newsect;
- elf_section_data (newsect)->this_hdr = *hdr;
-
return TRUE;
}
case PT_TLS: pt = "TLS"; break;
case PT_GNU_EH_FRAME: pt = "EH_FRAME"; break;
case PT_GNU_STACK: pt = "STACK"; break;
+ case PT_GNU_RELRO: pt = "RELRO"; break;
default: sprintf (buf, "0x%lx", p->p_type); pt = buf; break;
}
fprintf (f, "%8s off 0x", pt);
/* This is a hook for the ELF emulation code in the generic linker to
tell the backend linker what file name to use for the DT_NEEDED
- entry for a dynamic object. The generic linker passes name as an
- empty string to indicate that no DT_NEEDED entry should be made. */
+ entry for a dynamic object. */
void
bfd_elf_set_dt_needed_name (bfd *abfd, const char *name)
}
void
-bfd_elf_set_dt_needed_soname (bfd *abfd, const char *name)
+bfd_elf_set_dyn_lib_class (bfd *abfd, int lib_class)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& bfd_get_format (abfd) == bfd_object)
- elf_dt_soname (abfd) = name;
+ elf_dyn_lib_class (abfd) = lib_class;
}
/* Get the list of DT_NEEDED entries for a link. This is a hook for
hdr->bfd_section->flags
|= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+ /* We try to keep the same section order as it comes in. */
+ idx += n_elt;
while (--n_elt != 0)
- if ((s = (++idx)->shdr->bfd_section) != NULL
+ if ((s = (--idx)->shdr->bfd_section) != NULL
&& elf_next_in_group (s) != NULL)
{
elf_next_in_group (hdr->bfd_section) = s;
{ ".gnu.version", 12, 0, SHT_GNU_versym, 0 },
{ ".gnu.version_d", 14, 0, SHT_GNU_verdef, 0 },
{ ".gnu.version_r", 14, 0, SHT_GNU_verneed, 0 },
+ { ".note.GNU-stack",15, 0, SHT_PROGBITS, 0 },
{ ".note", 5, -1, SHT_NOTE, 0 },
{ ".rela", 5, -1, SHT_RELA, 0 },
{ ".rel", 4, -1, SHT_REL, 0 },
case PT_GNU_STACK:
return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "stack");
+ case PT_GNU_RELRO:
+ return _bfd_elf_make_section_from_phdr (abfd, hdr, index, "relro");
+
default:
/* Check for any processor-specific program segment types.
If no handler for them, default to making "segment" sections. */
asect->flags. */
if (this_hdr->sh_type == SHT_NULL)
{
- if ((asect->flags & SEC_ALLOC) != 0
+ if ((asect->flags & SEC_GROUP) != 0)
+ {
+ /* We also need to mark SHF_GROUP here for relocatable
+ link. */
+ struct bfd_link_order *l;
+ asection *elt;
+
+ for (l = asect->link_order_head; l != NULL; l = l->next)
+ if (l->type == bfd_indirect_link_order
+ && (elt = elf_next_in_group (l->u.indirect.section)) != NULL)
+ do
+ {
+ /* The name is not important. Anything will do. */
+ elf_group_name (elt->output_section) = "G";
+ elf_section_flags (elt->output_section) |= SHF_GROUP;
+
+ elt = elf_next_in_group (elt);
+ /* During a relocatable link, the lists are
+ circular. */
+ }
+ while (elt != elf_next_in_group (l->u.indirect.section));
+
+ this_hdr->sh_type = SHT_GROUP;
+ }
+ else if ((asect->flags & SEC_ALLOC) != 0
&& (((asect->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
|| (asect->flags & SEC_NEVER_LOAD) != 0))
this_hdr->sh_type = SHT_NOBITS;
struct elf_segment_map **pm;
struct elf_segment_map *m;
asection *last_hdr;
+ bfd_vma last_size;
unsigned int phdr_index;
bfd_vma maxpagesize;
asection **hdrpp;
segment when the start of the second section can be placed within
a few bytes of the end of the first section. */
last_hdr = NULL;
+ last_size = 0;
phdr_index = 0;
maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
writable = FALSE;
segment. */
new_segment = TRUE;
}
- else if (BFD_ALIGN (last_hdr->lma + last_hdr->_raw_size, maxpagesize)
+ else if (BFD_ALIGN (last_hdr->lma + last_size, maxpagesize)
< BFD_ALIGN (hdr->lma, maxpagesize))
{
/* If putting this section in this segment would force us to
skip a page in the segment, then we need a new segment. */
new_segment = TRUE;
}
- else if ((last_hdr->flags & SEC_LOAD) == 0
- && (hdr->flags & SEC_LOAD) != 0)
+ else if ((last_hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == 0
+ && (hdr->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != 0)
{
/* We don't want to put a loadable section after a
- nonloadable section in the same segment. */
+ nonloadable section in the same segment.
+ Consider .tbss sections as loadable for this purpose. */
new_segment = TRUE;
}
else if ((abfd->flags & D_PAGED) == 0)
}
else if (! writable
&& (hdr->flags & SEC_READONLY) == 0
- && (((last_hdr->lma + last_hdr->_raw_size - 1)
+ && (((last_hdr->lma + last_size - 1)
& ~(maxpagesize - 1))
!= (hdr->lma & ~(maxpagesize - 1))))
{
if ((hdr->flags & SEC_READONLY) == 0)
writable = TRUE;
last_hdr = hdr;
+ /* .tbss sections effectively have zero size. */
+ if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
+ last_size = hdr->_raw_size;
+ else
+ last_size = 0;
continue;
}
writable = FALSE;
last_hdr = hdr;
+ /* .tbss sections effectively have zero size. */
+ if ((hdr->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) != SEC_THREAD_LOCAL)
+ last_size = hdr->_raw_size;
+ else
+ last_size = 0;
phdr_index = i;
phdr_in_segment = FALSE;
}
pm = &m->next;
}
+ if (elf_tdata (abfd)->relro)
+ {
+ amt = sizeof (struct elf_segment_map);
+ m = bfd_zalloc (abfd, amt);
+ if (m == NULL)
+ goto error_return;
+ m->next = NULL;
+ m->p_type = PT_GNU_RELRO;
+ m->p_flags = PF_R;
+ m->p_flags_valid = 1;
+
+ *pm = m;
+ pm = &m->next;
+ }
+
free (sections);
sections = NULL;
if (! m->p_paddr_valid)
p->p_paddr = phdrs_paddr;
}
+ else if (p->p_type == PT_GNU_RELRO)
+ {
+ Elf_Internal_Phdr *lp;
+
+ for (lp = phdrs; lp < phdrs + count; ++lp)
+ {
+ if (lp->p_type == PT_LOAD
+ && lp->p_vaddr <= link_info->relro_end
+ && lp->p_vaddr >= link_info->relro_start
+ && lp->p_vaddr + lp->p_filesz
+ >= link_info->relro_end)
+ break;
+ }
+
+ if (lp < phdrs + count
+ && link_info->relro_end > lp->p_vaddr)
+ {
+ p->p_vaddr = lp->p_vaddr;
+ p->p_paddr = lp->p_paddr;
+ p->p_offset = lp->p_offset;
+ p->p_filesz = link_info->relro_end - lp->p_vaddr;
+ p->p_memsz = p->p_filesz;
+ p->p_align = 1;
+ p->p_flags = (lp->p_flags & ~PF_W);
+ }
+ else
+ {
+ memset (p, 0, sizeof *p);
+ p->p_type = PT_NULL;
+ }
+ }
}
}
++segs;
}
+ if (elf_tdata (abfd)->relro)
+ {
+ /* We need a PT_GNU_RELRO segment. */
+ ++segs;
+ }
+
for (s = abfd->sections; s != NULL; s = s->next)
{
if ((s->flags & SEC_LOAD) != 0
|| obfd->xvec->flavour != bfd_target_elf_flavour)
return TRUE;
- if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
- {
- asection *s;
-
- /* Only set up the segments if there are no more SEC_ALLOC
- sections. FIXME: This won't do the right thing if objcopy is
- used to remove the last SEC_ALLOC section, since objcopy
- won't call this routine in that case. */
- for (s = isec->next; s != NULL; s = s->next)
- if ((s->flags & SEC_ALLOC) != 0)
- break;
- if (s == NULL)
- {
- if (! copy_private_bfd_data (ibfd, obfd))
- return FALSE;
- }
- }
-
ihdr = &elf_section_data (isec)->this_hdr;
ohdr = &elf_section_data (osec)->this_hdr;
return TRUE;
}
+/* Copy private header information. */
+
+bfd_boolean
+_bfd_elf_copy_private_header_data (bfd *ibfd, bfd *obfd)
+{
+ if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+ || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+ return TRUE;
+
+ /* Copy over private BFD data if it has not already been copied.
+ This must be done here, rather than in the copy_private_bfd_data
+ entry point, because the latter is called after the section
+ contents have been set, which means that the program headers have
+ already been worked out. */
+ if (elf_tdata (obfd)->segment_map == NULL && elf_tdata (ibfd)->phdr != NULL)
+ {
+ if (! copy_private_bfd_data (ibfd, obfd))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
/* Copy private symbol information. If this symbol is in a section
which we did not map into a BFD section, try to map the section
index correctly. We use special macro definitions for the mapped
return (*get_elf_backend_data (templ)->elf_backend_bfd_from_remote_memory)
(templ, ehdr_vma, loadbasep, target_read_memory);
}
+\f
+long
+_bfd_elf_get_synthetic_symtab (bfd *abfd, asymbol **dynsyms, asymbol **ret)
+{
+ const struct elf_backend_data *bed = get_elf_backend_data (abfd);
+ asection *relplt;
+ asymbol *s;
+ const char *relplt_name;
+ bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
+ arelent *p;
+ long count, i, n;
+ size_t size;
+ Elf_Internal_Shdr *hdr;
+ char *names;
+ asection *plt;
+
+ *ret = NULL;
+ if (!bed->plt_sym_val)
+ return 0;
+
+ relplt_name = bed->relplt_name;
+ if (relplt_name == NULL)
+ relplt_name = bed->default_use_rela_p ? ".rela.plt" : ".rel.plt";
+ relplt = bfd_get_section_by_name (abfd, relplt_name);
+ if (relplt == NULL)
+ return 0;
+
+ hdr = &elf_section_data (relplt)->this_hdr;
+ if (hdr->sh_link != elf_dynsymtab (abfd)
+ || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
+ return 0;
+
+ plt = bfd_get_section_by_name (abfd, ".plt");
+ if (plt == NULL)
+ return 0;
+
+ slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
+ if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
+ return -1;
+
+ count = relplt->_raw_size / hdr->sh_entsize;
+ size = count * sizeof (asymbol);
+ p = relplt->relocation;
+ for (i = 0; i < count; i++, s++, p++)
+ size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
+
+ s = *ret = bfd_malloc (size);
+ if (s == NULL)
+ return -1;
+
+ names = (char *) (s + count);
+ p = relplt->relocation;
+ n = 0;
+ for (i = 0; i < count; i++, s++, p++)
+ {
+ size_t len;
+ bfd_vma addr;
+
+ addr = bed->plt_sym_val (i, plt, p);
+ if (addr == (bfd_vma) -1)
+ continue;
+
+ *s = **p->sym_ptr_ptr;
+ s->section = plt;
+ s->value = addr - plt->vma;
+ s->name = names;
+ len = strlen ((*p->sym_ptr_ptr)->name);
+ memcpy (names, (*p->sym_ptr_ptr)->name, len);
+ names += len;
+ memcpy (names, "@plt", sizeof ("@plt"));
+ names += sizeof ("@plt");
+ ++n;
+ }
+
+ return n;
+}
projects / deliverable / binutils-gdb.git / blobdiff