/* IBM S/390-specific support for ELF 32 and 64 bit functions
- Copyright (C) 2000-2014 Free Software Foundation, Inc.
+ Copyright (C) 2000-2017 Free Software Foundation, Inc.
Contributed by Andreas Krebbel.
This file is part of BFD, the Binary File Descriptor library.
flags = bed->dynamic_sec_flags;
- if (info->shared)
+ if (bfd_link_pic (info))
{
s = bfd_make_section_with_flags (abfd, ".rela.ifunc",
flags | SEC_READONLY);
static bfd_boolean
s390_elf_allocate_ifunc_dyn_relocs (struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- struct elf_dyn_relocs **head)
+ struct elf_link_hash_entry *h)
{
struct elf_dyn_relocs *p;
struct elf_link_hash_table *htab;
struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
+ struct elf_dyn_relocs **head = &eh->dyn_relocs;
htab = elf_hash_table (info);
eh->ifunc_resolver_address = h->root.u.def.value;
where it is marked with regular reference, but not non-GOT
reference. It may happen if we didn't see STT_GNU_IFUNC
symbol at the time when checking relocations. */
- if (info->shared
+ if (bfd_link_pic (info)
&& !h->non_got_ref
&& h->ref_regular)
for (p = *head; p != NULL; p = p->next)
point to the IPLT slot. That way the referencing shared lib will
always get the PLT slot address when resolving the respective
R_390_GLOB_DAT/R_390_64 relocs on that symbol. */
- if (info->executable && !info->shared && h->def_regular && h->ref_dynamic)
+ if (bfd_link_pde (info)
+ && h->def_regular
+ && h->ref_dynamic)
{
h->root.u.def.section = htab->iplt;
h->root.u.def.value = h->plt.offset;
h->type = STT_FUNC;
}
- /* We need dynamic relocation for STT_GNU_IFUNC symbol only when
- there is a non-GOT reference in a shared object. */
- if (!info->shared || !h->non_got_ref)
+ if (!bfd_link_pic (info))
*head = NULL;
/* Finally, allocate space. */
avoided if the values in the GOT slots could differ for pointer
equality reasons. */
if (h->got.refcount <= 0
- || (info->shared
+ || (bfd_link_pic (info)
&& (h->dynindx == -1 || h->forced_local))
- || (info->executable && info->shared)
+ || bfd_link_pie (info)
|| htab->sgot == NULL)
{
/* Use .got.iplt. */
{
h->got.offset = htab->sgot->size;
htab->sgot->size += GOT_ENTRY_SIZE;
- if (info->shared)
+ if (bfd_link_pic (info))
htab->srelgot->size += RELA_ENTRY_SIZE;
}
asection **secp ATTRIBUTE_UNUSED,
bfd_vma *valp ATTRIBUTE_UNUSED)
{
- if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
- || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
+ if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
&& (abfd->flags & DYNAMIC) == 0
&& bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
- elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
+ elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc;
+
+ return TRUE;
+}
+
+/* Whether to sort relocs output by ld -r or ld --emit-relocs, by
+ r_offset. Don't do so for code sections. We want to keep ordering
+ of GDCALL / PLT32DBL for TLS optimizations as is. On the other
+ hand, elf-eh-frame.c processing requires .eh_frame relocs to be
+ sorted. */
+
+static bfd_boolean
+elf_s390_elf_sort_relocs_p (asection *sec)
+{
+ return (sec->flags & SEC_CODE) == 0;
+}
+
+/* Merge object attributes from IBFD into OBFD. Raise an error if
+ there are conflicting attributes. */
+static bfd_boolean
+elf_s390_merge_obj_attributes (bfd *ibfd, struct bfd_link_info *info)
+{
+ bfd *obfd = info->output_bfd;
+ obj_attribute *in_attr, *in_attrs;
+ obj_attribute *out_attr, *out_attrs;
+
+ if (!elf_known_obj_attributes_proc (obfd)[0].i)
+ {
+ /* This is the first object. Copy the attributes. */
+ _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+ /* Use the Tag_null value to indicate the attributes have been
+ initialized. */
+ elf_known_obj_attributes_proc (obfd)[0].i = 1;
+
+ return TRUE;
+ }
+
+ in_attrs = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
+ out_attrs = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
+
+ /* Check for conflicting Tag_GNU_S390_ABI_Vector attributes and
+ merge non-conflicting ones. */
+ in_attr = &in_attrs[Tag_GNU_S390_ABI_Vector];
+ out_attr = &out_attrs[Tag_GNU_S390_ABI_Vector];
+
+ if (in_attr->i > 2)
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("Warning: %B uses unknown vector ABI %d"), ibfd,
+ in_attr->i);
+ else if (out_attr->i > 2)
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("Warning: %B uses unknown vector ABI %d"), obfd,
+ out_attr->i);
+ else if (in_attr->i != out_attr->i)
+ {
+ out_attr->type = ATTR_TYPE_FLAG_INT_VAL;
+
+ if (in_attr->i && out_attr->i)
+ {
+ const char abi_str[3][9] = { "none", "software", "hardware" };
+
+ _bfd_error_handler
+ /* xgettext:c-format */
+ (_("Warning: %B uses vector %s ABI, %B uses %s ABI"),
+ ibfd, abi_str[in_attr->i], obfd, abi_str[out_attr->i]);
+ }
+ if (in_attr->i > out_attr->i)
+ out_attr->i = in_attr->i;
+ }
+
+ /* Merge Tag_compatibility attributes and any common GNU ones. */
+ _bfd_elf_merge_object_attributes (ibfd, info);
return TRUE;
}
projects / deliverable / binutils-gdb.git / blobdiff