/* X86-64 specific support for ELF
Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010, 2011, 2012
+ 2010, 2011, 2012, 2013
Free Software Foundation, Inc.
Contributed by Jan Hubicka <jh@suse.cz>.
HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
MINUS_ONE, FALSE),
- EMPTY_HOWTO (32),
- EMPTY_HOWTO (33),
+ HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
+ bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
+ FALSE),
+ HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
+ bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
+ FALSE),
HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield, bfd_elf_generic_reloc,
"R_X86_64_GOTPC32_TLSDESC",
R_X86_64_standard counts the number up to this point, and
R_X86_64_vt_offset is the value to subtract from a reloc type of
R_X86_64_GNU_VT* to form an index into this table. */
-#define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
+#define R_X86_64_standard (R_X86_64_RELATIVE64 + 1)
#define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
/* GNU extension to record C++ vtable hierarchy. */
{ BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
{ BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
{ BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
+ { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
+ { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
{ BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
{ BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
{ BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
/* pr_cursig */
- elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
+ elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
- elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
+ elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
/* pr_reg */
offset = 72;
case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
/* pr_cursig */
- elf_tdata (abfd)->core_signal
+ elf_tdata (abfd)->core->signal
= bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
- elf_tdata (abfd)->core_lwpid
+ elf_tdata (abfd)->core->lwpid
= bfd_get_32 (abfd, note->descdata + 32);
/* pr_reg */
return FALSE;
case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
- elf_tdata (abfd)->core_pid
+ elf_tdata (abfd)->core->pid
= bfd_get_32 (abfd, note->descdata + 12);
- elf_tdata (abfd)->core_program
+ elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
- elf_tdata (abfd)->core_command
+ elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
break;
case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
- elf_tdata (abfd)->core_pid
+ elf_tdata (abfd)->core->pid
= bfd_get_32 (abfd, note->descdata + 24);
- elf_tdata (abfd)->core_program
+ elf_tdata (abfd)->core->program
= _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
- elf_tdata (abfd)->core_command
+ elf_tdata (abfd)->core->command
= _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
}
implementations, so strip it off if it exists. */
{
- char *command = elf_tdata (abfd)->core_command;
+ char *command = elf_tdata (abfd)->core->command;
int n = strlen (command);
if (0 < n && command[n - 1] == ' ')
struct elf_x86_64_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
- ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
+ ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
if (ret == NULL)
return NULL;
return NULL;
}
- ret->sdynbss = NULL;
- ret->srelbss = NULL;
- ret->plt_eh_frame = NULL;
- ret->sym_cache.abfd = NULL;
- ret->tlsdesc_plt = 0;
- ret->tlsdesc_got = 0;
- ret->tls_ld_got.refcount = 0;
- ret->sgotplt_jump_table_size = 0;
- ret->tls_module_base = NULL;
- ret->next_jump_slot_index = 0;
- ret->next_irelative_index = 0;
-
if (ABI_64_P (abfd))
{
ret->r_info = elf64_r_info;
htab_delete (htab->loc_hash_table);
if (htab->loc_hash_memory)
objalloc_free ((struct objalloc *) htab->loc_hash_memory);
- _bfd_generic_link_hash_table_free (hash);
+ _bfd_elf_link_hash_table_free (hash);
}
/* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
struct elf_link_hash_entry *h;
Elf_Internal_Sym *isym;
const char *name;
+ bfd_boolean size_reloc;
r_symndx = htab->r_sym (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
break;
}
- /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
- it here if it is defined in a non-shared object. */
- if (h->type == STT_GNU_IFUNC
- && h->def_regular)
- {
- /* It is referenced by a non-shared object. */
- h->ref_regular = 1;
- h->needs_plt = 1;
-
- /* STT_GNU_IFUNC symbol must go through PLT. */
- h->plt.refcount += 1;
-
- /* STT_GNU_IFUNC needs dynamic sections. */
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
-
- switch (r_type)
- {
- default:
- if (h->root.root.string)
- name = h->root.root.string;
- else
- name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
- NULL);
- (*_bfd_error_handler)
- (_("%B: relocation %s against STT_GNU_IFUNC "
- "symbol `%s' isn't handled by %s"), abfd,
- x86_64_elf_howto_table[r_type].name,
- name, __FUNCTION__);
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
-
- case R_X86_64_32:
- if (ABI_64_P (abfd))
- goto not_pointer;
- case R_X86_64_64:
- h->non_got_ref = 1;
- h->pointer_equality_needed = 1;
- if (info->shared)
- {
- /* We must copy these reloc types into the output
- file. Create a reloc section in dynobj and
- make room for this reloc. */
- sreloc = _bfd_elf_create_ifunc_dyn_reloc
- (abfd, info, sec, sreloc,
- &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
- if (sreloc == NULL)
- return FALSE;
- }
- break;
-
- case R_X86_64_32S:
- case R_X86_64_PC32:
- case R_X86_64_PC64:
-not_pointer:
- h->non_got_ref = 1;
- if (r_type != R_X86_64_PC32
- && r_type != R_X86_64_PC64)
- h->pointer_equality_needed = 1;
- break;
-
- case R_X86_64_PLT32:
- break;
-
- case R_X86_64_GOTPCREL:
- case R_X86_64_GOTPCREL64:
- h->got.refcount += 1;
- if (htab->elf.sgot == NULL
- && !_bfd_elf_create_got_section (htab->elf.dynobj,
- info))
- return FALSE;
- break;
- }
-
- continue;
- }
+ /* It is referenced by a non-shared object. */
+ h->ref_regular = 1;
+ h->root.non_ir_ref = 1;
}
if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
(*_bfd_error_handler)
(_("%B: '%s' accessed both as normal and thread local symbol"),
abfd, name);
+ bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
}
goto create_got;
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
+ size_reloc = TRUE;
+ goto do_size;
+
case R_X86_64_32:
if (!ABI_64_P (abfd))
goto pointer;
h->pointer_equality_needed = 1;
}
+ size_reloc = FALSE;
+do_size:
/* If we are creating a shared library, and this is a reloc
against a global symbol, or a non PC relative reloc
against a local symbol, then we need to copy the reloc
}
p->count += 1;
- if (IS_X86_64_PCREL_TYPE (r_type))
+ /* Count size relocation as PC-relative relocation. */
+ if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
p->pc_count += 1;
}
break;
case R_X86_64_PC16:
case R_X86_64_PC32:
case R_X86_64_PC64:
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
if (info->shared
&& (h == NULL || h->type != STT_GNU_IFUNC))
break;
/* STT_GNU_IFUNC symbol must go through PLT. */
if (h->type == STT_GNU_IFUNC)
{
- /* Check local STT_GNU_IFUNC calls. */
+ /* All local STT_GNU_IFUNC references must be treate as local
+ calls via local PLT. */
if (h->ref_regular
&& SYMBOL_CALLS_LOCAL (info, h))
{
- bfd_size_type pc_count = 0;
+ bfd_size_type pc_count = 0, count = 0;
struct elf_dyn_relocs **pp;
eh = (struct elf_x86_64_link_hash_entry *) h;
pc_count += p->pc_count;
p->count -= p->pc_count;
p->pc_count = 0;
+ count += p->count;
if (p->count == 0)
*pp = p->next;
else
pp = &p->next;
}
- if (pc_count)
+ if (pc_count || count)
{
h->needs_plt = 1;
- h->plt.refcount += 1;
h->non_got_ref = 1;
+ if (h->plt.refcount <= 0)
+ h->plt.refcount = 1;
+ else
+ h->plt.refcount += 1;
}
}
return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
&eh->dyn_relocs,
plt_entry_size,
+ plt_entry_size,
GOT_ENTRY_SIZE);
else if (htab->elf.dynamic_sections_created
&& h->plt.refcount > 0)
bfd_reloc_status_type r;
int tls_type;
asection *base_got;
+ bfd_vma st_size;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == (int) R_X86_64_GNU_VTINHERIT
|| r_type == (int) R_X86_64_GNU_VTENTRY)
continue;
- if (r_type >= R_X86_64_max)
+ if (r_type >= (int) R_X86_64_standard)
{
+ (*_bfd_error_handler)
+ (_("%B: unrecognized relocation (0x%x) in section `%A'"),
+ input_bfd, input_section, r_type);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
&sec, rel);
+ st_size = sym->st_size;
/* Relocate against local STT_GNU_IFUNC symbol. */
if (!info->relocatable
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
+ st_size = h->size;
}
if (sec != NULL && discarded_section (sec))
if (info->relocatable)
continue;
- if (rel->r_addend == 0
- && r_type == R_X86_64_64
- && !ABI_64_P (output_bfd))
+ if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
{
- /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
- it to 64bit if addend is zero. */
- r_type = R_X86_64_32;
- memset (contents + rel->r_offset + 4, 0, 4);
+ if (r_type == R_X86_64_64)
+ {
+ /* For x32, treat R_X86_64_64 like R_X86_64_32 and
+ zero-extend it to 64bit if addend is zero. */
+ r_type = R_X86_64_32;
+ memset (contents + rel->r_offset + 4, 0, 4);
+ }
+ else if (r_type == R_X86_64_SIZE64)
+ {
+ /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
+ zero-extend it to 64bit if addend is zero. */
+ r_type = R_X86_64_SIZE32;
+ memset (contents + rel->r_offset + 4, 0, 4);
+ }
}
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle
unresolved_reloc = FALSE;
break;
+ case R_X86_64_SIZE32:
+ case R_X86_64_SIZE64:
+ /* Set to symbol size. */
+ relocation = st_size;
+ goto direct;
+
case R_X86_64_PC8:
case R_X86_64_PC16:
case R_X86_64_PC32:
/* FIXME: The ABI says the linker should make sure the value is
the same when it's zeroextended to 64 bit. */
+direct:
if ((input_section->flags & SEC_ALLOC) == 0)
break;
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak)
- && (! IS_X86_64_PCREL_TYPE (r_type)
+ && ((! IS_X86_64_PCREL_TYPE (r_type)
+ && r_type != R_X86_64_SIZE32
+ && r_type != R_X86_64_SIZE64)
|| ! SYMBOL_CALLS_LOCAL (info, h)))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
relocation = elf_x86_64_tpoff (info, relocation);
break;
+ case R_X86_64_DTPOFF64:
+ BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
+ relocation -= elf_x86_64_dtpoff_base (info);
+ break;
+
default:
break;
}
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
-elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
+elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const asection *rel_sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela *rela)
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
}
static bfd_boolean
-elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym,
+elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
+ const Elf_Internal_Sym *sym,
asection **psec,
- bfd_vma *pvalue ATTRIBUTE_UNUSED,
- unsigned int *pold_alignment ATTRIBUTE_UNUSED,
- bfd_boolean *skip ATTRIBUTE_UNUSED,
- bfd_boolean *override ATTRIBUTE_UNUSED,
- bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
- bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
- bfd_boolean *newdyn ATTRIBUTE_UNUSED,
- bfd_boolean *newdef,
- bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
- bfd_boolean *newweak ATTRIBUTE_UNUSED,
- bfd *abfd ATTRIBUTE_UNUSED,
- asection **sec,
- bfd_boolean *olddyn ATTRIBUTE_UNUSED,
- bfd_boolean *olddef,
- bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
- bfd_boolean *oldweak ATTRIBUTE_UNUSED,
+ bfd_boolean newdef,
+ bfd_boolean olddef,
bfd *oldbfd,
- asection **oldsec)
+ const asection *oldsec)
{
/* A normal common symbol and a large common symbol result in a
normal common symbol. We turn the large common symbol into a
normal one. */
- if (!*olddef
+ if (!olddef
&& h->root.type == bfd_link_hash_common
- && !*newdef
- && bfd_is_com_section (*sec)
- && *oldsec != *sec)
+ && !newdef
+ && bfd_is_com_section (*psec)
+ && oldsec != *psec)
{
if (sym->st_shndx == SHN_COMMON
- && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
+ && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
{
h->root.u.c.p->section
= bfd_make_section_old_way (oldbfd, "COMMON");
h->root.u.c.p->section->flags = SEC_ALLOC;
}
else if (sym->st_shndx == SHN_X86_64_LCOMMON
- && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
- *psec = *sec = bfd_com_section_ptr;
+ && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
+ *psec = bfd_com_section_ptr;
}
return TRUE;
projects / deliverable / binutils-gdb.git / blobdiff