Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
-#include "sysdep.h"
-#include "bfd.h"
-#include "bfdlink.h"
-#include "libbfd.h"
-#include "elf-bfd.h"
+#include "elfxx-x86.h"
#include "elf-nacl.h"
-#include "bfd_stdint.h"
-#include "objalloc.h"
-#include "hashtab.h"
#include "dwarf2.h"
#include "libiberty.h"
relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
since they are the same. */
-#define ABI_64_P(abfd) \
- (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
-
/* The relocation "howto" table. Order of fields:
type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
\f
/* Functions for the x86-64 ELF linker. */
-/* The name of the dynamic interpreter. This is put in the .interp
- section. */
-
-#define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
-#define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
-
-/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
- copying dynamic variables from a shared lib into an app's dynbss
- section, and instead use a dynamic relocation to point into the
- shared lib. */
-#define ELIMINATE_COPY_RELOCS 1
-
/* The size in bytes of an entry in the global offset table. */
#define GOT_ENTRY_SIZE 8
DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
};
-struct elf_x86_64_lazy_plt_layout
-{
- /* Templates for the initial PLT entry and for subsequent entries. */
- const bfd_byte *plt0_entry;
- const bfd_byte *plt_entry;
- unsigned int plt_entry_size; /* Size of each PLT entry. */
-
- /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
- unsigned int plt0_got1_offset;
- unsigned int plt0_got2_offset;
-
- /* Offset of the end of the PC-relative instruction containing
- plt0_got2_offset. */
- unsigned int plt0_got2_insn_end;
-
- /* Offsets into plt_entry that are to be replaced with... */
- unsigned int plt_got_offset; /* ... address of this symbol in .got. */
- unsigned int plt_reloc_offset; /* ... offset into relocation table. */
- unsigned int plt_plt_offset; /* ... offset to start of .plt. */
-
- /* Length of the PC-relative instruction containing plt_got_offset. */
- unsigned int plt_got_insn_size;
-
- /* Offset of the end of the PC-relative jump to plt0_entry. */
- unsigned int plt_plt_insn_end;
-
- /* Offset into plt_entry where the initial value of the GOT entry points. */
- unsigned int plt_lazy_offset;
-
- /* .eh_frame covering the lazy .plt section. */
- const bfd_byte *eh_frame_plt;
- unsigned int eh_frame_plt_size;
-};
-
-struct elf_x86_64_non_lazy_plt_layout
-{
- /* Template for the lazy PLT entries. */
- const bfd_byte *plt_entry;
- unsigned int plt_entry_size; /* Size of each PLT entry. */
-
- /* Offsets into plt_entry that are to be replaced with... */
- unsigned int plt_got_offset; /* ... address of this symbol in .got. */
-
- /* Length of the PC-relative instruction containing plt_got_offset. */
- unsigned int plt_got_insn_size;
-
- /* .eh_frame covering the non-lazy .plt section. */
- const bfd_byte *eh_frame_plt;
- unsigned int eh_frame_plt_size;
-};
-
-struct elf_x86_64_plt_layout
-{
- /* Template for the PLT entries. */
- const bfd_byte *plt_entry;
- unsigned int plt_entry_size; /* Size of each PLT entry. */
-
- /* 1 has PLT0. */
- unsigned int has_plt0;
-
- /* Offsets into plt_entry that are to be replaced with... */
- unsigned int plt_got_offset; /* ... address of this symbol in .got. */
-
- /* Length of the PC-relative instruction containing plt_got_offset. */
- unsigned int plt_got_insn_size;
-
- /* .eh_frame covering the .plt section. */
- const bfd_byte *eh_frame_plt;
- unsigned int eh_frame_plt_size;
-};
-
/* Architecture-specific backend data for x86-64. */
struct elf_x86_64_backend_data
get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
/* These are the standard parameters. */
-static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_plt =
+static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt =
{
elf_x86_64_lazy_plt0_entry, /* plt0_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
elf_x86_64_lazy_plt_entry, /* plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt0_got1_offset */
6, /* plt_got_insn_size */
LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */
6, /* plt_lazy_offset */
+ elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
+ elf_x86_64_lazy_plt_entry, /* pic_plt_entry */
elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */
sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
+static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
{
elf_x86_64_non_lazy_plt_entry, /* plt_entry */
+ elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */
NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt_got_offset */
6, /* plt_got_insn_size */
sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
+static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
{
elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt0_got1_offset */
1+6, /* plt_got_insn_size */
11, /* plt_plt_insn_end */
0, /* plt_lazy_offset */
+ elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
+ elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */
elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */
sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
+static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
{
elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */
+ elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */
NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
1+2, /* plt_got_offset */
1+6, /* plt_got_insn_size */
sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
+static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
{
elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt0_got1_offset */
4+1+6, /* plt_got_insn_size */
4+1+5+5, /* plt_plt_insn_end */
0, /* plt_lazy_offset */
+ elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
+ elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */
elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_lazy_plt_layout elf_x32_lazy_ibt_plt =
+static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt =
{
elf_x86_64_lazy_plt0_entry, /* plt0_entry */
+ LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
elf_x32_lazy_ibt_plt_entry, /* plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt0_got1_offset */
4+6, /* plt_got_insn_size */
4+5+5, /* plt_plt_insn_end */
0, /* plt_lazy_offset */
+ elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
+ elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */
elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
+static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
{
elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */
+ elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
4+1+2, /* plt_got_offset */
4+1+6, /* plt_got_insn_size */
sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
};
-static const struct elf_x86_64_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
+static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
{
elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */
+ elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */
LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
4+2, /* plt_got_offset */
4+6, /* plt_got_insn_size */
#define elf_backend_arch_data &elf_x86_64_arch_bed
-/* Is a undefined weak symbol which is resolved to 0. Reference to an
- undefined weak symbol is resolved to 0 when building executable if
- it isn't dynamic and
- 1. Has non-GOT/non-PLT relocations in text section. Or
- 2. Has no GOT/PLT relocation.
- Local undefined weak symbol is always resolved to 0.
- */
-#define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
- ((EH)->elf.root.type == bfd_link_hash_undefweak \
- && ((EH)->elf.forced_local \
- || (bfd_link_executable (INFO) \
- && (elf_x86_64_hash_table (INFO)->interp == NULL \
- || !(GOT_RELOC) \
- || (EH)->has_non_got_reloc \
- || !(INFO)->dynamic_undefined_weak))))
-
-/* Should copy relocation be generated for a symbol. Don't generate
- copy relocation against a protected symbol defined in a shared
- object with GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
-#define SYMBOL_NO_COPYRELOC(INFO, EH) \
- ((EH)->def_protected \
- && ((EH)->elf.root.type == bfd_link_hash_defined \
- || (EH)->elf.root.type == bfd_link_hash_defweak) \
- && elf_has_no_copy_on_protected ((EH)->elf.root.u.def.section->owner) \
- && ((EH)->elf.root.u.def.section->owner->flags & DYNAMIC) != 0 \
- && ((EH)->elf.root.u.def.section->flags & SEC_CODE) == 0)
-
-/* x86-64 ELF linker hash entry. */
-
-struct elf_x86_64_link_hash_entry
-{
- struct elf_link_hash_entry elf;
-
- /* Track dynamic relocs copied for this symbol. */
- struct elf_dyn_relocs *dyn_relocs;
-
-#define GOT_UNKNOWN 0
-#define GOT_NORMAL 1
-#define GOT_TLS_GD 2
+/* Values in tls_type of x86 ELF linker hash entry. */
#define GOT_TLS_IE 3
#define GOT_TLS_GDESC 4
#define GOT_TLS_GD_BOTH_P(type) \
((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
#define GOT_TLS_GD_ANY_P(type) \
(GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
- unsigned char tls_type;
-
- /* TRUE if a weak symbol with a real definition needs a copy reloc.
- When there is a weak symbol with a real definition, the processor
- independent code will have arranged for us to see the real
- definition first. We need to copy the needs_copy bit from the
- real definition and check it when allowing copy reloc in PIE. */
- unsigned int needs_copy : 1;
-
- /* TRUE if symbol has GOT or PLT relocations. */
- unsigned int has_got_reloc : 1;
-
- /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
- unsigned int has_non_got_reloc : 1;
-
- /* Don't call finish_dynamic_symbol on this symbol. */
- unsigned int no_finish_dynamic_symbol : 1;
-
- /* TRUE if symbol is __tls_get_addr. */
- unsigned int tls_get_addr : 1;
-
- /* TRUE if symbol is defined as a protected symbol. */
- unsigned int def_protected : 1;
-
- /* Reference count of C/C++ function pointer relocations in read-write
- section which can be resolved at run-time. */
- bfd_signed_vma func_pointer_refcount;
-
- /* Information about the GOT PLT entry. Filled when there are both
- GOT and PLT relocations against the same function. */
- union gotplt_union plt_got;
-
- /* Information about the second PLT entry. */
- union gotplt_union plt_second;
-
- /* Offset of the GOTPLT entry reserved for the TLS descriptor,
- starting at the end of the jump table. */
- bfd_vma tlsdesc_got;
-};
-
-#define elf_x86_64_hash_entry(ent) \
- ((struct elf_x86_64_link_hash_entry *)(ent))
-
-struct elf_x86_64_obj_tdata
-{
- struct elf_obj_tdata root;
-
- /* tls_type for each local got entry. */
- char *local_got_tls_type;
-
- /* GOTPLT entries for TLS descriptors. */
- bfd_vma *local_tlsdesc_gotent;
-};
-
-#define elf_x86_64_tdata(abfd) \
- ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
-
-#define elf_x86_64_local_got_tls_type(abfd) \
- (elf_x86_64_tdata (abfd)->local_got_tls_type)
-
-#define elf_x86_64_local_tlsdesc_gotent(abfd) \
- (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
#define is_x86_64_elf(bfd) \
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
&& elf_tdata (bfd) != NULL \
&& elf_object_id (bfd) == X86_64_ELF_DATA)
-static bfd_boolean
-elf_x86_64_mkobject (bfd *abfd)
-{
- return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
- X86_64_ELF_DATA);
-}
-
-/* x86-64 ELF linker hash table. */
-
-struct elf_x86_64_link_hash_table
-{
- struct elf_link_hash_table elf;
-
- /* Short-cuts to get to dynamic linker sections. */
- asection *interp;
- asection *plt_eh_frame;
- asection *plt_second;
- asection *plt_second_eh_frame;
- asection *plt_got;
- asection *plt_got_eh_frame;
-
- /* Parameters describing PLT generation, lazy or non-lazy. */
- struct elf_x86_64_plt_layout plt;
-
- /* Parameters describing lazy PLT generation. */
- const struct elf_x86_64_lazy_plt_layout *lazy_plt;
-
- /* Parameters describing non-lazy PLT generation. */
- const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
-
- union
- {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tls_ld_got;
-
- /* The amount of space used by the jump slots in the GOT. */
- bfd_vma sgotplt_jump_table_size;
-
- /* Small local sym cache. */
- struct sym_cache sym_cache;
-
- bfd_vma (*r_info) (bfd_vma, bfd_vma);
- bfd_vma (*r_sym) (bfd_vma);
- unsigned int pointer_r_type;
- const char *dynamic_interpreter;
- int dynamic_interpreter_size;
-
- /* _TLS_MODULE_BASE_ symbol. */
- struct bfd_link_hash_entry *tls_module_base;
-
- /* Used by local STT_GNU_IFUNC symbols. */
- htab_t loc_hash_table;
- void * loc_hash_memory;
-
- /* The offset into splt of the PLT entry for the TLS descriptor
- resolver. Special values are 0, if not necessary (or not found
- to be necessary yet), and -1 if needed but not determined
- yet. */
- bfd_vma tlsdesc_plt;
- /* The offset into sgot of the GOT entry used by the PLT entry
- above. */
- bfd_vma tlsdesc_got;
-
- /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
- bfd_vma next_jump_slot_index;
- /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
- bfd_vma next_irelative_index;
-
- /* TRUE if there are dynamic relocs against IFUNC symbols that apply
- to read-only sections. */
- bfd_boolean readonly_dynrelocs_against_ifunc;
-};
-
-/* Get the x86-64 ELF linker hash table from a link_info structure. */
-
-#define elf_x86_64_hash_table(p) \
- (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
- == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
-
#define elf_x86_64_compute_jump_table_size(htab) \
((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
-/* Create an entry in an x86-64 ELF linker hash table. */
-
-static struct bfd_hash_entry *
-elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
-{
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = (struct bfd_hash_entry *)
- bfd_hash_allocate (table,
- sizeof (struct elf_x86_64_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
-
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry != NULL)
- {
- struct elf_x86_64_link_hash_entry *eh;
-
- eh = (struct elf_x86_64_link_hash_entry *) entry;
- eh->dyn_relocs = NULL;
- eh->tls_type = GOT_UNKNOWN;
- eh->needs_copy = 0;
- eh->has_got_reloc = 0;
- eh->has_non_got_reloc = 0;
- eh->no_finish_dynamic_symbol = 0;
- eh->tls_get_addr = 0;
- eh->func_pointer_refcount = 0;
- eh->plt_second.offset = (bfd_vma) -1;
- eh->plt_got.offset = (bfd_vma) -1;
- eh->tlsdesc_got = (bfd_vma) -1;
- }
-
- return entry;
-}
-
-/* Compute a hash of a local hash entry. We use elf_link_hash_entry
- for local symbol so that we can handle local STT_GNU_IFUNC symbols
- as global symbol. We reuse indx and dynstr_index for local symbol
- hash since they aren't used by global symbols in this backend. */
-
-static hashval_t
-elf_x86_64_local_htab_hash (const void *ptr)
-{
- struct elf_link_hash_entry *h
- = (struct elf_link_hash_entry *) ptr;
- return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
-}
-
-/* Compare local hash entries. */
-
-static int
-elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
-{
- struct elf_link_hash_entry *h1
- = (struct elf_link_hash_entry *) ptr1;
- struct elf_link_hash_entry *h2
- = (struct elf_link_hash_entry *) ptr2;
-
- return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
-}
-
-/* Find and/or create a hash entry for local symbol. */
-
-static struct elf_link_hash_entry *
-elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
- bfd *abfd, const Elf_Internal_Rela *rel,
- bfd_boolean create)
-{
- struct elf_x86_64_link_hash_entry e, *ret;
- asection *sec = abfd->sections;
- hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
- htab->r_sym (rel->r_info));
- void **slot;
-
- e.elf.indx = sec->id;
- e.elf.dynstr_index = htab->r_sym (rel->r_info);
- slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
- create ? INSERT : NO_INSERT);
-
- if (!slot)
- return NULL;
-
- if (*slot)
- {
- ret = (struct elf_x86_64_link_hash_entry *) *slot;
- return &ret->elf;
- }
-
- ret = (struct elf_x86_64_link_hash_entry *)
- objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
- sizeof (struct elf_x86_64_link_hash_entry));
- if (ret)
- {
- memset (ret, 0, sizeof (*ret));
- ret->elf.indx = sec->id;
- ret->elf.dynstr_index = htab->r_sym (rel->r_info);
- ret->elf.dynindx = -1;
- ret->func_pointer_refcount = 0;
- ret->plt_got.offset = (bfd_vma) -1;
- *slot = ret;
- }
- return &ret->elf;
-}
-
-/* Destroy an X86-64 ELF linker hash table. */
-
-static void
-elf_x86_64_link_hash_table_free (bfd *obfd)
-{
- struct elf_x86_64_link_hash_table *htab
- = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
-
- if (htab->loc_hash_table)
- htab_delete (htab->loc_hash_table);
- if (htab->loc_hash_memory)
- objalloc_free ((struct objalloc *) htab->loc_hash_memory);
- _bfd_elf_link_hash_table_free (obfd);
-}
-
-/* Create an X86-64 ELF linker hash table. */
-
-static struct bfd_link_hash_table *
-elf_x86_64_link_hash_table_create (bfd *abfd)
-{
- 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_zmalloc (amt);
- if (ret == NULL)
- return NULL;
-
- if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
- elf_x86_64_link_hash_newfunc,
- sizeof (struct elf_x86_64_link_hash_entry),
- X86_64_ELF_DATA))
- {
- free (ret);
- return NULL;
- }
-
- if (ABI_64_P (abfd))
- {
- ret->r_info = elf64_r_info;
- ret->r_sym = elf64_r_sym;
- ret->pointer_r_type = R_X86_64_64;
- ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
- ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
- }
- else
- {
- ret->r_info = elf32_r_info;
- ret->r_sym = elf32_r_sym;
- ret->pointer_r_type = R_X86_64_32;
- ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
- ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
- }
-
- ret->loc_hash_table = htab_try_create (1024,
- elf_x86_64_local_htab_hash,
- elf_x86_64_local_htab_eq,
- NULL);
- ret->loc_hash_memory = objalloc_create ();
- if (!ret->loc_hash_table || !ret->loc_hash_memory)
- {
- elf_x86_64_link_hash_table_free (abfd);
- return NULL;
- }
- ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
-
- return &ret->elf.root;
-}
-
-/* Copy the extra info we tack onto an elf_link_hash_entry. */
-
-static void
-elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
-{
- struct elf_x86_64_link_hash_entry *edir, *eind;
-
- edir = (struct elf_x86_64_link_hash_entry *) dir;
- eind = (struct elf_x86_64_link_hash_entry *) ind;
-
- edir->has_got_reloc |= eind->has_got_reloc;
- edir->has_non_got_reloc |= eind->has_non_got_reloc;
-
- if (eind->dyn_relocs != NULL)
- {
- if (edir->dyn_relocs != NULL)
- {
- struct elf_dyn_relocs **pp;
- struct elf_dyn_relocs *p;
-
- /* Add reloc counts against the indirect sym to the direct sym
- list. Merge any entries against the same section. */
- for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
- {
- struct elf_dyn_relocs *q;
-
- for (q = edir->dyn_relocs; q != NULL; q = q->next)
- if (q->sec == p->sec)
- {
- q->pc_count += p->pc_count;
- q->count += p->count;
- *pp = p->next;
- break;
- }
- if (q == NULL)
- pp = &p->next;
- }
- *pp = edir->dyn_relocs;
- }
-
- edir->dyn_relocs = eind->dyn_relocs;
- eind->dyn_relocs = NULL;
- }
-
- if (ind->root.type == bfd_link_hash_indirect
- && dir->got.refcount <= 0)
- {
- edir->tls_type = eind->tls_type;
- eind->tls_type = GOT_UNKNOWN;
- }
-
- if (ELIMINATE_COPY_RELOCS
- && ind->root.type != bfd_link_hash_indirect
- && dir->dynamic_adjusted)
- {
- /* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy non_got_ref.
- We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- if (dir->versioned != versioned_hidden)
- dir->ref_dynamic |= ind->ref_dynamic;
- dir->ref_regular |= ind->ref_regular;
- dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
- dir->needs_plt |= ind->needs_plt;
- dir->pointer_equality_needed |= ind->pointer_equality_needed;
- }
- else
- {
- if (eind->func_pointer_refcount > 0)
- {
- edir->func_pointer_refcount += eind->func_pointer_refcount;
- eind->func_pointer_refcount = 0;
- }
-
- _bfd_elf_link_hash_copy_indirect (info, dir, ind);
- }
-}
-
static bfd_boolean
elf64_x86_64_elf_object_p (bfd *abfd)
{
bfd_boolean largepic = FALSE;
struct elf_link_hash_entry *h;
bfd_vma offset;
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd_byte *call;
bfd_boolean indirect_call;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
offset = rel->r_offset;
switch (r_type)
{
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
if (h == NULL
- || !((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr)
+ || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
return FALSE;
else if (largepic)
return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
name = h->root.root.string;
else
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
name = "*unknown*";
else
v = _("protected symbol ");
break;
default:
- if (((struct elf_x86_64_link_hash_entry *) h)->def_protected)
+ if (((struct elf_x86_link_hash_entry *) h)->def_protected)
v = _("protected symbol ");
else
v = _("symbol ");
bfd_boolean *converted,
struct bfd_link_info *link_info)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd_boolean is_pic;
bfd_boolean require_reloc_pc32;
bfd_boolean relocx;
if (raddend != -4)
return TRUE;
- htab = elf_x86_64_hash_table (link_info);
+ htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
is_pic = bfd_link_pic (link_info);
relocx = (r_type == R_X86_64_GOTPCRELX
R_X86_64_PC32. */
if ((relocx || opcode == 0x8b)
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
+ X86_64_ELF_DATA,
TRUE,
- elf_x86_64_hash_entry (h)))
+ elf_x86_hash_entry (h)))
{
if (opcode == 0xff)
{
}
else
{
- struct elf_x86_64_link_hash_entry *eh
- = (struct elf_x86_64_link_hash_entry *) h;
+ struct elf_x86_link_hash_entry *eh
+ = (struct elf_x86_link_hash_entry *) h;
/* Convert to "nop call foo". ADDR_PREFIX_OPCODE
is a nop prefix. */
asection *sec,
const Elf_Internal_Rela *relocs)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
const Elf_Internal_Rela *rel;
BFD_ASSERT (is_x86_64_elf (abfd));
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
{
sec->check_relocs_failed = 1;
unsigned int r_type;
unsigned int r_symndx;
struct elf_link_hash_entry *h;
- struct elf_x86_64_link_hash_entry *eh;
+ struct elf_x86_link_hash_entry *eh;
Elf_Internal_Sym *isym;
const char *name;
bfd_boolean size_reloc;
/* Check relocation against local STT_GNU_IFUNC symbol. */
if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
{
- h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
- TRUE);
+ h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel,
+ TRUE);
if (h == NULL)
goto error_return;
rel, rel_end, h, r_symndx, FALSE))
goto error_return;
- eh = (struct elf_x86_64_link_hash_entry *) h;
+ eh = (struct elf_x86_link_hash_entry *) h;
switch (r_type)
{
case R_X86_64_TLSLD:
- htab->tls_ld_got.refcount += 1;
+ htab->tls_ld_or_ldm_got.refcount += 1;
goto create_got;
case R_X86_64_TPOFF32:
if (local_got_refcounts == NULL)
goto error_return;
elf_local_got_refcounts (abfd) = local_got_refcounts;
- elf_x86_64_local_tlsdesc_gotent (abfd)
+ elf_x86_local_tlsdesc_gotent (abfd)
= (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
- elf_x86_64_local_got_tls_type (abfd)
+ elf_x86_local_got_tls_type (abfd)
= (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
}
local_got_refcounts[r_symndx] += 1;
old_tls_type
- = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
+ = elf_x86_local_got_tls_type (abfd) [r_symndx];
}
/* If a TLS symbol is accessed using IE at least once,
if (eh != NULL)
eh->tls_type = tls_type;
else
- elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
+ elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
}
}
/* Fall through */
return FALSE;
}
-/* Return the section that should be marked against GC for a given
- relocation. */
-
-static asection *
-elf_x86_64_gc_mark_hook (asection *sec,
- struct bfd_link_info *info,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
-{
- if (h != NULL)
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_X86_64_GNU_VTINHERIT:
- case R_X86_64_GNU_VTENTRY:
- return NULL;
- }
-
- return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
-}
-
-/* Remove undefined weak symbol from the dynamic symbol table if it
- is resolved to 0. */
-
-static bfd_boolean
-elf_x86_64_fixup_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
-{
- if (h->dynindx != -1
- && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
- elf_x86_64_hash_entry (h)->has_got_reloc,
- elf_x86_64_hash_entry (h)))
- {
- h->dynindx = -1;
- _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
- h->dynstr_index);
- }
- return TRUE;
-}
-
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
-
-static bfd_boolean
-elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
-{
- struct elf_x86_64_link_hash_table *htab;
- asection *s, *srel;
- struct elf_x86_64_link_hash_entry *eh;
- struct elf_dyn_relocs *p;
-
- /* STT_GNU_IFUNC symbol must go through PLT. */
- if (h->type == STT_GNU_IFUNC)
- {
- /* 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, count = 0;
- struct elf_dyn_relocs **pp;
-
- eh = (struct elf_x86_64_link_hash_entry *) h;
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
- {
- 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 || count)
- {
- h->non_got_ref = 1;
- if (pc_count)
- {
- /* Increment PLT reference count only for PC-relative
- references. */
- h->needs_plt = 1;
- if (h->plt.refcount <= 0)
- h->plt.refcount = 1;
- else
- h->plt.refcount += 1;
- }
- }
- }
-
- if (h->plt.refcount <= 0)
- {
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
- return TRUE;
- }
-
- /* If this is a function, put it in the procedure linkage table. We
- will fill in the contents of the procedure linkage table later,
- when we know the address of the .got section. */
- if (h->type == STT_FUNC
- || h->needs_plt)
- {
- if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
- {
- /* This case can occur if we saw a PLT32 reloc in an input
- file, but the symbol was never referred to by a dynamic
- object, or if all references were garbage collected. In
- such a case, we don't actually need to build a procedure
- linkage table, and we can just do a PC32 reloc instead. */
- h->plt.offset = (bfd_vma) -1;
- h->needs_plt = 0;
- }
-
- return TRUE;
- }
- else
- /* It's possible that we incorrectly decided a .plt reloc was
- needed for an R_X86_64_PC32 reloc to a non-function sym in
- check_relocs. We can't decide accurately between function and
- non-function syms in check-relocs; Objects loaded later in
- the link may change h->type. So fix it now. */
- h->plt.offset = (bfd_vma) -1;
-
- eh = (struct elf_x86_64_link_hash_entry *) h;
-
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->u.weakdef != NULL)
- {
- BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
- || h->u.weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->u.weakdef->root.u.def.section;
- h->root.u.def.value = h->u.weakdef->root.u.def.value;
- if (ELIMINATE_COPY_RELOCS
- || info->nocopyreloc
- || SYMBOL_NO_COPYRELOC (info, eh))
- {
- h->non_got_ref = h->u.weakdef->non_got_ref;
- eh->needs_copy = h->u.weakdef->needs_copy;
- }
- return TRUE;
- }
-
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
-
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (!bfd_link_executable (info))
- return TRUE;
-
- /* If there are no references to this symbol that do not use the
- GOT, we don't need to generate a copy reloc. */
- if (!h->non_got_ref)
- return TRUE;
-
- /* If -z nocopyreloc was given, we won't generate them either. */
- if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh))
- {
- h->non_got_ref = 0;
- return TRUE;
- }
-
- if (ELIMINATE_COPY_RELOCS)
- {
- eh = (struct elf_x86_64_link_hash_entry *) h;
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- s = p->sec->output_section;
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- break;
- }
-
- /* If we didn't find any dynamic relocs in read-only sections, then
- we'll be keeping the dynamic relocs and avoiding the copy reloc. */
- if (p == NULL)
- {
- h->non_got_ref = 0;
- return TRUE;
- }
- }
-
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable. */
-
- htab = elf_x86_64_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
- to copy the initial value out of the dynamic object and into the
- runtime process image. */
- if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
- {
- s = htab->elf.sdynrelro;
- srel = htab->elf.sreldynrelro;
- }
- else
- {
- s = htab->elf.sdynbss;
- srel = htab->elf.srelbss;
- }
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
- {
- const struct elf_backend_data *bed;
- bed = get_elf_backend_data (info->output_bfd);
- srel->size += bed->s->sizeof_rela;
- h->needs_copy = 1;
- }
-
- return _bfd_elf_adjust_dynamic_copy (info, h, s);
-}
-
/* Allocate space in .plt, .got and associated reloc sections for
dynamic relocs. */
elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
{
struct bfd_link_info *info;
- struct elf_x86_64_link_hash_table *htab;
- struct elf_x86_64_link_hash_entry *eh;
+ struct elf_x86_link_hash_table *htab;
+ struct elf_x86_link_hash_entry *eh;
struct elf_dyn_relocs *p;
const struct elf_backend_data *bed;
unsigned int plt_entry_size;
if (h->root.type == bfd_link_hash_indirect)
return TRUE;
- eh = (struct elf_x86_64_link_hash_entry *) h;
+ eh = (struct elf_x86_link_hash_entry *) h;
info = (struct bfd_link_info *) inf;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
bed = get_elf_backend_data (info->output_bfd);
+
plt_entry_size = htab->plt.plt_entry_size;
resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
+ X86_64_ELF_DATA,
eh->has_got_reloc,
eh);
if (h->got.refcount > 0
&& bfd_link_executable (info)
&& h->dynindx == -1
- && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
+ && elf_x86_hash_entry (h)->tls_type == GOT_TLS_IE)
{
h->got.offset = (bfd_vma) -1;
}
{
asection *s;
bfd_boolean dyn;
- int tls_type = elf_x86_64_hash_entry (h)->tls_type;
+ int tls_type = elf_x86_hash_entry (h)->tls_type;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
return elf_x86_64_allocate_dynrelocs (h, inf);
}
-/* Find any dynamic relocs that apply to read-only sections. */
-
-static bfd_boolean
-elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
- void * inf)
-{
- struct elf_x86_64_link_hash_entry *eh;
- struct elf_dyn_relocs *p;
-
- /* Skip local IFUNC symbols. */
- if (h->forced_local && h->type == STT_GNU_IFUNC)
- return TRUE;
-
- eh = (struct elf_x86_64_link_hash_entry *) h;
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- asection *s = p->sec->output_section;
-
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- {
- struct bfd_link_info *info = (struct bfd_link_info *) inf;
-
- info->flags |= DF_TEXTREL;
-
- if ((info->warn_shared_textrel && bfd_link_pic (info))
- || info->error_textrel)
- /* xgettext:c-format */
- info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
- p->sec->owner, h->root.root.string,
- p->sec);
-
- /* Not an error, just cut short the traversal. */
- return FALSE;
- }
- }
- return TRUE;
-}
-
/* Convert load via the GOT slot to load immediate. */
static bfd_boolean
Elf_Internal_Rela *internal_relocs;
Elf_Internal_Rela *irel, *irelend;
bfd_byte *contents;
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd_boolean changed;
bfd_signed_vma *local_got_refcounts;
return FALSE;
changed = FALSE;
- htab = elf_x86_64_hash_table (link_info);
+ htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
local_got_refcounts = elf_local_got_refcounts (abfd);
/* Get the section contents. */
r_symndx = htab->r_sym (irel->r_info);
if (r_symndx < symtab_hdr->sh_info)
- h = elf_x86_64_get_local_sym_hash (htab, sec->owner,
- (const Elf_Internal_Rela *) irel,
- FALSE);
+ h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
+ (const Elf_Internal_Rela *) irel,
+ FALSE);
else
{
h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
elf_x86_64_size_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd *dynobj;
asection *s;
bfd_boolean relocs;
bfd *ibfd;
const struct elf_backend_data *bed;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
bed = get_elf_backend_data (output_bfd);
symtab_hdr = &elf_symtab_hdr (ibfd);
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
- local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
- local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
+ local_tls_type = elf_x86_local_got_tls_type (ibfd);
+ local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
s = htab->elf.sgot;
srel = htab->elf.srelgot;
for (; local_got < end_local_got;
}
}
- if (htab->tls_ld_got.refcount > 0)
+ if (htab->tls_ld_or_ldm_got.refcount > 0)
{
/* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
relocs. */
- htab->tls_ld_got.offset = htab->elf.sgot->size;
+ htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
htab->elf.srelgot->size += bed->s->sizeof_rela;
}
else
- htab->tls_ld_got.offset = -1;
+ htab->tls_ld_or_ldm_got.offset = -1;
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
then we need a DT_TEXTREL entry. */
if ((info->flags & DF_TEXTREL) == 0)
elf_link_hash_traverse (&htab->elf,
- elf_x86_64_readonly_dynrelocs,
+ _bfd_x86_elf_readonly_dynrelocs,
info);
if ((info->flags & DF_TEXTREL) != 0)
return TRUE;
}
-static bfd_boolean
-elf_x86_64_always_size_sections (bfd *output_bfd,
- struct bfd_link_info *info)
-{
- asection *tls_sec = elf_hash_table (info)->tls_sec;
-
- if (tls_sec)
- {
- struct elf_link_hash_entry *tlsbase;
-
- tlsbase = elf_link_hash_lookup (elf_hash_table (info),
- "_TLS_MODULE_BASE_",
- FALSE, FALSE, FALSE);
-
- if (tlsbase && tlsbase->type == STT_TLS)
- {
- struct elf_x86_64_link_hash_table *htab;
- struct bfd_link_hash_entry *bh = NULL;
- const struct elf_backend_data *bed
- = get_elf_backend_data (output_bfd);
-
- htab = elf_x86_64_hash_table (info);
- if (htab == NULL)
- return FALSE;
-
- if (!(_bfd_generic_link_add_one_symbol
- (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
- tls_sec, 0, NULL, FALSE,
- bed->collect, &bh)))
- return FALSE;
-
- htab->tls_module_base = bh;
-
- tlsbase = (struct elf_link_hash_entry *)bh;
- tlsbase->def_regular = 1;
- tlsbase->other = STV_HIDDEN;
- tlsbase->root.linker_def = 1;
- (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
- }
- }
-
- return TRUE;
-}
-
-/* _TLS_MODULE_BASE_ needs to be treated especially when linking
- executables. Rather than setting it to the beginning of the TLS
- section, we have to set it to the end. This function may be called
- multiple times, it is idempotent. */
-
-static void
-elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
-{
- struct elf_x86_64_link_hash_table *htab;
- struct bfd_link_hash_entry *base;
-
- if (!bfd_link_executable (info))
- return;
-
- htab = elf_x86_64_hash_table (info);
- if (htab == NULL)
- return;
-
- base = htab->tls_module_base;
- if (base == NULL)
- return;
-
- base->u.def.value = htab->elf.tls_size;
-}
-
-/* Return the base VMA address which should be subtracted from real addresses
- when resolving @dtpoff relocation.
- This is PT_TLS segment p_vaddr. */
-
-static bfd_vma
-elf_x86_64_dtpoff_base (struct bfd_link_info *info)
-{
- /* If tls_sec is NULL, we should have signalled an error already. */
- if (elf_hash_table (info)->tls_sec == NULL)
- return 0;
- return elf_hash_table (info)->tls_sec->vma;
-}
-
/* Return the relocation value for @tpoff relocation
if STT_TLS virtual address is ADDRESS. */
Elf_Internal_Sym *local_syms,
asection **local_sections)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
bfd_vma *local_got_offsets;
if (input_section->check_relocs_failed)
return FALSE;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
plt_entry_size = htab->plt.plt_entry_size;
symtab_hdr = &elf_symtab_hdr (input_bfd);
sym_hashes = elf_sym_hashes (input_bfd);
local_got_offsets = elf_local_got_offsets (input_bfd);
- local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
+ local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
- elf_x86_64_set_tls_module_base (info);
+ _bfd_x86_elf_set_tls_module_base (info);
rel = wrel = relocs;
relend = relocs + input_section->reloc_count;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
- struct elf_x86_64_link_hash_entry *eh;
+ struct elf_x86_link_hash_entry *eh;
Elf_Internal_Sym *sym;
asection *sec;
bfd_vma off, offplt, plt_offset;
if (!bfd_link_relocatable (info)
&& ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
{
- h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
- rel, FALSE);
+ h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd,
+ rel, FALSE);
if (h == NULL)
abort ();
}
}
- eh = (struct elf_x86_64_link_hash_entry *) h;
+ eh = (struct elf_x86_link_hash_entry *) h;
/* Since STT_GNU_IFUNC symbol must go through PLT, we handle
it here if it is defined in a non-shared object. */
resolved_to_zero = (eh != NULL
&& UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
+ X86_64_ELF_DATA,
eh->has_got_reloc,
eh));
case R_X86_64_GOTTPOFF:
tls_type = GOT_UNKNOWN;
if (h == NULL && local_got_offsets)
- tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
+ tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
else if (h != NULL)
- tls_type = elf_x86_64_hash_entry (h)->tls_type;
+ tls_type = elf_x86_hash_entry (h)->tls_type;
if (! elf_x86_64_tls_transition (info, input_bfd,
input_section, contents,
if (h != NULL)
{
off = h->got.offset;
- offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
+ offplt = elf_x86_hash_entry (h)->tlsdesc_got;
}
else
{
+ htab->sgotplt_jump_table_size);
sreloc = htab->elf.srelplt;
if (indx == 0)
- outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
+ outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
else
outrel.r_addend = 0;
elf_append_rela (output_bfd, sreloc, &outrel);
outrel.r_addend = 0;
if ((dr_type == R_X86_64_TPOFF64
|| dr_type == R_X86_64_TLSDESC) && indx == 0)
- outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
+ outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
outrel.r_info = htab->r_info (indx, dr_type);
elf_append_rela (output_bfd, sreloc, &outrel);
{
BFD_ASSERT (! unresolved_reloc);
bfd_put_64 (output_bfd,
- relocation - elf_x86_64_dtpoff_base (info),
+ relocation - _bfd_x86_elf_dtpoff_base (info),
htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
}
else
if (htab->elf.sgot == NULL)
abort ();
- off = htab->tls_ld_got.offset;
+ off = htab->tls_ld_or_ldm_got.offset;
if (off & 1)
off &= ~1;
else
outrel.r_addend = 0;
elf_append_rela (output_bfd, htab->elf.srelgot,
&outrel);
- htab->tls_ld_got.offset |= 1;
+ htab->tls_ld_or_ldm_got.offset |= 1;
}
relocation = htab->elf.sgot->output_section->vma
+ htab->elf.sgot->output_offset + off;
case R_X86_64_DTPOFF32:
if (!bfd_link_executable (info)
|| (input_section->flags & SEC_CODE) == 0)
- relocation -= elf_x86_64_dtpoff_base (info);
+ relocation -= _bfd_x86_elf_dtpoff_base (info);
else
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);
+ relocation -= _bfd_x86_elf_dtpoff_base (info);
break;
default:
struct elf_link_hash_entry *h,
Elf_Internal_Sym *sym)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd_boolean use_plt_second;
- struct elf_x86_64_link_hash_entry *eh;
+ struct elf_x86_link_hash_entry *eh;
bfd_boolean local_undefweak;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
/* Use the second PLT section only if there is .plt section. */
use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
- eh = (struct elf_x86_64_link_hash_entry *) h;
+ eh = (struct elf_x86_link_hash_entry *) h;
if (eh->no_finish_dynamic_symbol)
abort ();
resolved undefined weak symbols in executable so that their
references have value 0 at run-time. */
local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
+ X86_64_ELF_DATA,
eh->has_got_reloc,
eh);
/* Don't generate dynamic GOT relocation against undefined weak
symbol in executable. */
if (h->got.offset != (bfd_vma) -1
- && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
- && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
+ && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type)
+ && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE
&& !local_undefweak)
{
Elf_Internal_Rela rela;
else if (bfd_link_pic (info)
&& SYMBOL_REFERENCES_LOCAL (info, h))
{
- if (!h->def_regular)
+ if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
return FALSE;
BFD_ASSERT((h->got.offset & 1) != 0);
rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
= (struct bfd_link_info *) inf;
return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
- info, h, NULL);
+ info, h, NULL);
}
/* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
return TRUE;
return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
- info, h, NULL);
+ info, h, NULL);
}
/* Used to decide how to sort relocs in an optimal manner for the
{
bfd *abfd = info->output_bfd;
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
- struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
+ struct elf_x86_link_hash_table *htab
+ = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab->elf.dynsym != NULL
&& htab->elf.dynsym->contents != NULL)
elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
struct bfd_link_info *info)
{
- struct elf_x86_64_link_hash_table *htab;
+ struct elf_x86_link_hash_table *htab;
bfd *dynobj;
asection *sdyn;
- htab = elf_x86_64_hash_table (info);
+ htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
table. */
memcpy (htab->elf.splt->contents,
htab->lazy_plt->plt0_entry,
- htab->lazy_plt->plt_entry_size);
+ htab->lazy_plt->plt0_entry_size);
/* Add offset for pushq GOT+8(%rip), since the instruction
uses 6 bytes subtract this value. */
bfd_put_32 (output_bfd,
memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
htab->lazy_plt->plt0_entry,
- htab->lazy_plt->plt_entry_size);
+ htab->lazy_plt->plt0_entry_size);
/* Add offset for pushq GOT+8(%rip), since the
instruction uses 6 bytes subtract this value. */
}
}
}
- }
- if (htab->plt_got != NULL && htab->plt_got->size > 0)
- elf_section_data (htab->plt_got->output_section)
- ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
+ if (htab->plt_got != NULL && htab->plt_got->size > 0)
+ elf_section_data (htab->plt_got->output_section)
+ ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
- if (htab->plt_second != NULL && htab->plt_second->size > 0)
- elf_section_data (htab->plt_second->output_section)
- ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
+ if (htab->plt_second != NULL && htab->plt_second->size > 0)
+ elf_section_data (htab->plt_second->output_section)
+ ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
+ }
/* GOT is always created in setup_gnu_properties. But it may not be
needed. */
asection *,
struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
{
- struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
+ struct elf_x86_link_hash_table *htab
+ = elf_x86_hash_table (info, X86_64_ELF_DATA);
if (htab == NULL)
return FALSE;
return TRUE;
}
-/* Sort relocs into address order. */
-
-static int
-compare_relocs (const void *ap, const void *bp)
-{
- const arelent *a = * (const arelent **) ap;
- const arelent *b = * (const arelent **) bp;
-
- if (a->address > b->address)
- return 1;
- else if (a->address < b->address)
- return -1;
- else
- return 0;
-}
-
-enum elf_x86_64_plt_type
-{
- plt_non_lazy = 0,
- plt_lazy = 1 << 0,
- plt_second = 1 << 1,
- plt_unknown = -1
-};
-
-struct elf_x86_64_plt
-{
- const char *name;
- asection *sec;
- bfd_byte *contents;
- enum elf_x86_64_plt_type type;
- unsigned int plt_got_offset;
- unsigned int plt_got_insn_size;
- unsigned int plt_entry_size;
- long count;
-};
-
/* Forward declaration. */
-static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt;
+static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt;
/* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
dynamic relocations. */
asymbol **dynsyms,
asymbol **ret)
{
- long size, count, i, n, len;
+ long count, i, n;
int j;
- unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
- asymbol *s;
bfd_byte *plt_contents;
- long dynrelcount, relsize;
- arelent **dynrelbuf, *p;
- const struct elf_x86_64_lazy_plt_layout *lazy_plt;
- const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
- const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt;
- const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt;
- const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt;
- const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt;
+ long relsize;
+ const struct elf_x86_lazy_plt_layout *lazy_plt;
+ const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
+ const struct elf_x86_lazy_plt_layout *lazy_bnd_plt;
+ const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt;
+ const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
+ const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
asection *plt;
- char *names;
- enum elf_x86_64_plt_type plt_type;
- struct elf_x86_64_plt plts[] =
+ enum elf_x86_plt_type plt_type;
+ struct elf_x86_plt plts[] =
{
{ ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
{ ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
if (relsize <= 0)
return -1;
- dynrelbuf = (arelent **) bfd_malloc (relsize);
- if (dynrelbuf == NULL)
- return -1;
-
- dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
- dynsyms);
-
- /* Sort the relocs by address. */
- qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
-
if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
{
lazy_plt = &elf_x86_64_lazy_plt;
for (j = 0; plts[j].name != NULL; j++)
{
plt = bfd_get_section_by_name (abfd, plts[j].name);
- if (plt == NULL)
+ if (plt == NULL || plt->size == 0)
continue;
/* Get the PLT section contents. */
/* Check what kind of PLT it is. */
plt_type = plt_unknown;
- if (plts[j].type == plt_unknown)
+ if (plts[j].type == plt_unknown
+ && (plt->size >= (lazy_plt->plt_entry_size
+ + lazy_plt->plt_entry_size)))
{
/* Match lazy PLT first. Need to check the first two
instructions. */
}
if (non_lazy_plt != NULL
- && (plt_type == plt_unknown || plt_type == plt_non_lazy))
+ && (plt_type == plt_unknown || plt_type == plt_non_lazy)
+ && plt->size >= non_lazy_plt->plt_entry_size)
{
/* Match non-lazy PLT. */
if (memcmp (plt_contents, non_lazy_plt->plt_entry,
if (plt_type == plt_unknown || plt_type == plt_second)
{
if (non_lazy_bnd_plt != NULL
+ && plt->size >= non_lazy_bnd_plt->plt_entry_size
&& (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
non_lazy_bnd_plt->plt_got_offset) == 0))
{
non_lazy_plt = non_lazy_bnd_plt;
}
else if (non_lazy_ibt_plt != NULL
+ && plt->size >= non_lazy_ibt_plt->plt_entry_size
&& (memcmp (plt_contents,
non_lazy_ibt_plt->plt_entry,
non_lazy_ibt_plt->plt_got_offset) == 0))
}
if (plt_type == plt_unknown)
- continue;
+ {
+ free (plt_contents);
+ continue;
+ }
plts[j].sec = plt;
plts[j].type = plt_type;
plts[j].contents = plt_contents;
}
- size = count * sizeof (asymbol);
-
- /* Allocate space for @plt suffixes. */
- n = 0;
- for (i = 0; i < dynrelcount; i++)
- {
- p = dynrelbuf[i];
- size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
- if (p->addend != 0)
- size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
- }
-
- s = *ret = (asymbol *) bfd_zmalloc (size);
- if (s == NULL)
- {
-bad_return:
- for (j = 0; plts[j].name != NULL; j++)
- if (plts[j].contents != NULL)
- free (plts[j].contents);
- free (dynrelbuf);
- return -1;
- }
-
- /* Check for each PLT section. */
- names = (char *) (s + count);
- size = 0;
- n = 0;
- for (j = 0; plts[j].name != NULL; j++)
- if ((plt_contents = plts[j].contents) != NULL)
- {
- long k;
- bfd_vma offset;
-
- plt_got_offset = plts[j].plt_got_offset;
- plt_got_insn_size = plts[j].plt_got_insn_size;
- plt_entry_size = plts[j].plt_entry_size;
-
- plt = plts[j].sec;
-
- if ((plts[j].type & plt_lazy))
- {
- /* Skip PLT0 in lazy PLT. */
- k = 1;
- offset = plt_entry_size;
- }
- else
- {
- k = 0;
- offset = 0;
- }
-
- /* Check each PLT entry against dynamic relocations. */
- for (; k < plts[j].count; k++)
- {
- int off;
- bfd_vma got_vma;
- long min, max, mid;
-
- /* Get the PC-relative offset, a signed 32-bit integer. */
- off = H_GET_32 (abfd, (plt_contents + offset
- + plt_got_offset));
- got_vma = plt->vma + offset + off + plt_got_insn_size;
-
- /* Binary search. */
- p = dynrelbuf[0];
- min = 0;
- max = dynrelcount;
- while ((min + 1) < max)
- {
- arelent *r;
-
- mid = (min + max) / 2;
- r = dynrelbuf[mid];
- if (got_vma > r->address)
- min = mid;
- else if (got_vma < r->address)
- max = mid;
- else
- {
- p = r;
- break;
- }
- }
-
- /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
- if (got_vma == p->address
- && p->howto != NULL
- && (p->howto->type == R_X86_64_JUMP_SLOT
- || p->howto->type == R_X86_64_GLOB_DAT
- || p->howto->type == R_X86_64_IRELATIVE))
- {
- *s = **p->sym_ptr_ptr;
- /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
- set. Since we are defining a symbol, ensure one
- of them is set. */
- if ((s->flags & BSF_LOCAL) == 0)
- s->flags |= BSF_GLOBAL;
- s->flags |= BSF_SYNTHETIC;
- /* This is no longer a section symbol. */
- s->flags &= ~BSF_SECTION_SYM;
- s->section = plt;
- s->the_bfd = plt->owner;
- s->value = offset;
- s->udata.p = NULL;
- s->name = names;
- len = strlen ((*p->sym_ptr_ptr)->name);
- memcpy (names, (*p->sym_ptr_ptr)->name, len);
- names += len;
- if (p->addend != 0)
- {
- char buf[30], *a;
-
- memcpy (names, "+0x", sizeof ("+0x") - 1);
- names += sizeof ("+0x") - 1;
- bfd_sprintf_vma (abfd, buf, p->addend);
- for (a = buf; *a == '0'; ++a)
- ;
- size = strlen (a);
- memcpy (names, a, size);
- names += size;
- }
- memcpy (names, "@plt", sizeof ("@plt"));
- names += sizeof ("@plt");
- n++;
- s++;
- }
- offset += plt_entry_size;
- }
- }
-
- /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
- if (n == 0)
- goto bad_return;
-
- count = n;
-
- for (j = 0; plts[j].name != NULL; j++)
- if (plts[j].contents != NULL)
- free (plts[j].contents);
-
- free (dynrelbuf);
-
- return count;
+ return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
+ (bfd_vma) 0, plts, dynsyms,
+ ret);
}
/* Handle an x86-64 specific section when reading an object file. This
return TRUE;
}
-static void
-elf_x86_64_merge_symbol_attribute (struct elf_link_hash_entry *h,
- const Elf_Internal_Sym *isym,
- bfd_boolean definition,
- bfd_boolean dynamic ATTRIBUTE_UNUSED)
-{
- if (definition)
- {
- struct elf_x86_64_link_hash_entry *eh
- = (struct elf_x86_64_link_hash_entry *) h;
- eh->def_protected = (ELF_ST_VISIBILITY (isym->st_other)
- == STV_PROTECTED);
- }
-}
-
static int
elf_x86_64_additional_program_headers (bfd *abfd,
struct bfd_link_info *info ATTRIBUTE_UNUSED)
return count;
}
-/* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
-
-static bfd_boolean
-elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
-{
- if (h->plt.offset != (bfd_vma) -1
- && !h->def_regular
- && !h->pointer_equality_needed)
- return FALSE;
-
- return _bfd_elf_hash_symbol (h);
-}
-
/* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
static bfd_boolean
&& _bfd_elf_relocs_compatible (input, output));
}
-/* Parse x86-64 GNU properties. */
-
-static enum elf_property_kind
-elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type,
- bfd_byte *ptr, unsigned int datasz)
-{
- elf_property *prop;
-
- switch (type)
- {
- case GNU_PROPERTY_X86_ISA_1_USED:
- case GNU_PROPERTY_X86_ISA_1_NEEDED:
- case GNU_PROPERTY_X86_FEATURE_1_AND:
- if (datasz != 4)
- {
- _bfd_error_handler
- ((type == GNU_PROPERTY_X86_ISA_1_USED
- ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
- : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
- ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
- : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
- abfd, datasz);
- return property_corrupt;
- }
- prop = _bfd_elf_get_property (abfd, type, datasz);
- /* Combine properties of the same type. */
- prop->u.number |= bfd_h_get_32 (abfd, ptr);
- prop->pr_kind = property_number;
- break;
-
- default:
- return property_ignored;
- }
-
- return property_number;
-}
-
-/* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
- return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
- should be merged with ABFD. */
-
-static bfd_boolean
-elf_x86_64_merge_gnu_properties (struct bfd_link_info *info,
- bfd *abfd ATTRIBUTE_UNUSED,
- elf_property *aprop,
- elf_property *bprop)
-{
- unsigned int number, features;
- bfd_boolean updated = FALSE;
- unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
-
- switch (pr_type)
- {
- case GNU_PROPERTY_X86_ISA_1_USED:
- case GNU_PROPERTY_X86_ISA_1_NEEDED:
- if (aprop != NULL && bprop != NULL)
- {
- number = aprop->u.number;
- aprop->u.number = number | bprop->u.number;
- updated = number != (unsigned int) aprop->u.number;
- }
- else
- {
- /* Return TRUE if APROP is NULL to indicate that BPROP should
- be added to ABFD. */
- updated = aprop == NULL;
- }
- break;
-
- case GNU_PROPERTY_X86_FEATURE_1_AND:
- /* Only one of APROP and BPROP can be NULL:
- 1. APROP & BPROP when both APROP and BPROP aren't NULL.
- 2. If APROP is NULL, remove x86 feature.
- 3. Otherwise, do nothing.
- */
- if (aprop != NULL && bprop != NULL)
- {
- features = 0;
- if (info->ibt)
- features = GNU_PROPERTY_X86_FEATURE_1_IBT;
- if (info->shstk)
- features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
- number = aprop->u.number;
- /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
- GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
- aprop->u.number = (number & bprop->u.number) | features;
- updated = number != (unsigned int) aprop->u.number;
- /* Remove the property if all feature bits are cleared. */
- if (aprop->u.number == 0)
- aprop->pr_kind = property_remove;
- }
- else
- {
- features = 0;
- if (info->ibt)
- features = GNU_PROPERTY_X86_FEATURE_1_IBT;
- if (info->shstk)
- features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
- if (features)
- {
- /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
- GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
- if (aprop != NULL)
- {
- number = aprop->u.number;
- aprop->u.number = number | features;
- updated = number != (unsigned int) aprop->u.number;
- }
- else
- {
- bprop->u.number |= features;
- updated = TRUE;
- }
- }
- else if (aprop != NULL)
- {
- aprop->pr_kind = property_remove;
- updated = TRUE;
- }
- }
- break;
-
- default:
- /* Never should happen. */
- abort ();
- }
-
- return updated;
-}
-
/* Set up x86-64 GNU properties. Return the first relocatable ELF input
with GNU properties if found. Otherwise, return NULL. */
static bfd *
elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
{
- bfd_boolean normal_target;
- bfd_boolean lazy_plt;
- asection *sec, *pltsec;
- bfd *dynobj;
- bfd_boolean use_ibt_plt;
- unsigned int plt_alignment, features;
- struct elf_x86_64_link_hash_table *htab;
- bfd *pbfd;
- bfd *ebfd = NULL;
- elf_property *prop;
-
- features = 0;
- if (info->ibt)
- features = GNU_PROPERTY_X86_FEATURE_1_IBT;
- if (info->shstk)
- features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
-
- /* Find a normal input file with GNU property note. */
- for (pbfd = info->input_bfds;
- pbfd != NULL;
- pbfd = pbfd->link.next)
- if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
- && bfd_count_sections (pbfd) != 0)
- {
- ebfd = pbfd;
-
- if (elf_properties (pbfd) != NULL)
- break;
- }
-
- if (ebfd != NULL && features)
- {
- /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
- GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
- prop = _bfd_elf_get_property (ebfd,
- GNU_PROPERTY_X86_FEATURE_1_AND,
- 4);
- prop->u.number |= features;
- prop->pr_kind = property_number;
-
- /* Create the GNU property note section if needed. */
- if (pbfd == NULL)
- {
- sec = bfd_make_section_with_flags (ebfd,
- NOTE_GNU_PROPERTY_SECTION_NAME,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_IN_MEMORY
- | SEC_READONLY
- | SEC_HAS_CONTENTS
- | SEC_DATA));
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
-
- if (!bfd_set_section_alignment (ebfd, sec,
- ABI_64_P (ebfd) ? 3 : 2))
- {
-error_alignment:
- info->callbacks->einfo (_("%F%A: failed to align section\n"),
- sec);
- }
-
- elf_section_type (sec) = SHT_NOTE;
- }
- }
-
- pbfd = _bfd_elf_link_setup_gnu_properties (info);
-
- if (bfd_link_relocatable (info))
- return pbfd;
+ struct elf_x86_plt_layout_table plt_layout;
- htab = elf_x86_64_hash_table (info);
- if (htab == NULL)
- return pbfd;
-
- use_ibt_plt = info->ibtplt || info->ibt;
- if (!use_ibt_plt && pbfd != NULL)
- {
- /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
- elf_property_list *p;
-
- /* The property list is sorted in order of type. */
- for (p = elf_properties (pbfd); p; p = p->next)
- {
- if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
- {
- use_ibt_plt = !!(p->property.u.number
- & GNU_PROPERTY_X86_FEATURE_1_IBT);
- break;
- }
- else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
- break;
- }
- }
-
- dynobj = htab->elf.dynobj;
-
- /* Set htab->elf.dynobj here so that there is no need to check and
- set it in check_relocs. */
- if (dynobj == NULL)
+ plt_layout.is_vxworks = FALSE;
+ if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal)
{
- if (pbfd != NULL)
+ if (info->bndplt)
{
- htab->elf.dynobj = pbfd;
- dynobj = pbfd;
+ plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt;
+ plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
}
else
{
- bfd *abfd;
-
- /* Find a normal input file to hold linker created
- sections. */
- for (abfd = info->input_bfds;
- abfd != NULL;
- abfd = abfd->link.next)
- if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
- && (abfd->flags
- & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
- {
- htab->elf.dynobj = abfd;
- dynobj = abfd;
- break;
- }
+ plt_layout.lazy_plt = &elf_x86_64_lazy_plt;
+ plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt;
}
- }
- /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
- still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
- canonical function address. */
- htab->plt.has_plt0 = 1;
-
- if (get_elf_x86_64_backend_data (info->output_bfd)->os
- == is_normal)
- {
- if (use_ibt_plt)
- {
- if (ABI_64_P (dynobj))
- {
- htab->lazy_plt = &elf_x86_64_lazy_ibt_plt;
- htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt;
- }
- else
- {
- htab->lazy_plt = &elf_x32_lazy_ibt_plt;
- htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt;
- }
- }
- else if (info->bndplt)
+ if (ABI_64_P (info->output_bfd))
{
- htab->lazy_plt = &elf_x86_64_lazy_bnd_plt;
- htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
+ plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
+ plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
}
else
{
- htab->lazy_plt = &elf_x86_64_lazy_plt;
- htab->non_lazy_plt = &elf_x86_64_non_lazy_plt;
+ plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
+ plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
}
- normal_target = TRUE;
- }
- else
- {
- htab->lazy_plt = &elf_x86_64_nacl_plt;
- htab->non_lazy_plt = NULL;
- normal_target = FALSE;
- }
-
- pltsec = htab->elf.splt;
-
- /* If the non-lazy PLT is available, use it for all PLT entries if
- there are no PLT0 or no .plt section. */
- if (htab->non_lazy_plt != NULL
- && (!htab->plt.has_plt0 || pltsec == NULL))
- {
- lazy_plt = FALSE;
- htab->plt.plt_entry
- = htab->non_lazy_plt->plt_entry;
- htab->plt.plt_entry_size
- = htab->non_lazy_plt->plt_entry_size;
- htab->plt.plt_got_offset
- = htab->non_lazy_plt->plt_got_offset;
- htab->plt.plt_got_insn_size
- = htab->non_lazy_plt->plt_got_insn_size;
- htab->plt.eh_frame_plt_size
- = htab->non_lazy_plt->eh_frame_plt_size;
- htab->plt.eh_frame_plt
- = htab->non_lazy_plt->eh_frame_plt;
+ plt_layout.normal_target = TRUE;
}
else
{
- lazy_plt = TRUE;
- htab->plt.plt_entry
- = htab->lazy_plt->plt_entry;
- htab->plt.plt_entry_size
- = htab->lazy_plt->plt_entry_size;
- htab->plt.plt_got_offset
- = htab->lazy_plt->plt_got_offset;
- htab->plt.plt_got_insn_size
- = htab->lazy_plt->plt_got_insn_size;
- htab->plt.eh_frame_plt_size
- = htab->lazy_plt->eh_frame_plt_size;
- htab->plt.eh_frame_plt
- = htab->lazy_plt->eh_frame_plt;
- }
-
- /* Return if there are no normal input files. */
- if (dynobj == NULL)
- return pbfd;
-
- /* Since create_dynamic_sections isn't always called, but GOT
- relocations need GOT relocations, create them here so that we
- don't need to do it in check_relocs. */
- if (htab->elf.sgot == NULL
- && !_bfd_elf_create_got_section (dynobj, info))
- info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
-
- /* Align .got and .got.plt sections to their entry size. Do it here
- instead of in create_dynamic_sections so that they are always
- properly aligned even if create_dynamic_sections isn't called. */
- sec = htab->elf.sgot;
- if (!bfd_set_section_alignment (dynobj, sec, 3))
- goto error_alignment;
-
- sec = htab->elf.sgotplt;
- if (!bfd_set_section_alignment (dynobj, sec, 3))
- goto error_alignment;
-
- /* Create the ifunc sections here so that check_relocs can be
- simplified. */
- if (!_bfd_elf_create_ifunc_sections (dynobj, info))
- info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
-
- plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
-
- if (pltsec != NULL)
- {
- /* Whe creating executable, set the contents of the .interp
- section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- asection *s = bfd_get_linker_section (dynobj, ".interp");
- if (s == NULL)
- abort ();
- s->size = htab->dynamic_interpreter_size;
- s->contents = (unsigned char *) htab->dynamic_interpreter;
- htab->interp = s;
- }
-
- /* Don't change PLT section alignment for NaCl since it uses
- 64-byte PLT entry and sets PLT section alignment to 32
- bytes. Don't create additional PLT sections for NaCl. */
- if (normal_target)
- {
- const struct elf_backend_data *bed
- = get_elf_backend_data (dynobj);
- flagword pltflags = (bed->dynamic_sec_flags
- | SEC_ALLOC
- | SEC_CODE
- | SEC_LOAD
- | SEC_READONLY);
- unsigned int non_lazy_plt_alignment
- = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
-
- sec = pltsec;
- if (!bfd_set_section_alignment (sec->owner, sec,
- plt_alignment))
- goto error_alignment;
-
- /* Create the GOT procedure linkage table. */
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".plt.got",
- pltflags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec,
- non_lazy_plt_alignment))
- goto error_alignment;
-
- htab->plt_got = sec;
-
- if (lazy_plt)
- {
- sec = NULL;
-
- if (use_ibt_plt)
- {
- /* Create the second PLT for Intel IBT support. IBT
- PLT is supported only for non-NaCl target and is
- is needed only for lazy binding. */
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".plt.sec",
- pltflags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec,
- plt_alignment))
- goto error_alignment;
- }
- else if (info->bndplt && ABI_64_P (dynobj))
- {
- /* Create the second PLT for Intel MPX support. MPX
- PLT is supported only for non-NaCl target in 64-bit
- mode and is needed only for lazy binding. */
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".plt.sec",
- pltflags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create BND PLT section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec,
- non_lazy_plt_alignment))
- goto error_alignment;
- }
-
- htab->plt_second = sec;
- }
- }
-
- if (!info->no_ld_generated_unwind_info)
- {
- flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
- | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
-
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".eh_frame",
- flags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec,
- ABI_64_P (dynobj) ? 3 : 2))
- goto error_alignment;
-
- htab->plt_eh_frame = sec;
-
- if (htab->plt_got != NULL)
- {
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".eh_frame",
- flags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec,
- ABI_64_P (dynobj) ? 3 : 2))
- goto error_alignment;
-
- htab->plt_got_eh_frame = sec;
- }
-
- if (htab->plt_second != NULL)
- {
- sec = bfd_make_section_anyway_with_flags (dynobj,
- ".eh_frame",
- flags);
- if (sec == NULL)
- info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
-
- if (!bfd_set_section_alignment (dynobj, sec, 3))
- goto error_alignment;
-
- htab->plt_second_eh_frame = sec;
- }
- }
- }
-
- if (normal_target)
- {
- /* The .iplt section is used for IFUNC symbols in static
- executables. */
- sec = htab->elf.iplt;
- if (sec != NULL
- && !bfd_set_section_alignment (sec->owner, sec,
- plt_alignment))
- goto error_alignment;
- }
-
- return pbfd;
-}
-
-static bfd_boolean
-elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info)
-{
- if (!bfd_link_relocatable (info))
- {
- /* Check for __tls_get_addr reference. */
- struct elf_link_hash_entry *h;
- h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
- FALSE, FALSE, FALSE);
- if (h != NULL)
- ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1;
+ plt_layout.lazy_plt = &elf_x86_64_nacl_plt;
+ plt_layout.non_lazy_plt = NULL;
+ plt_layout.lazy_ibt_plt = NULL;
+ plt_layout.non_lazy_ibt_plt = NULL;
+ plt_layout.normal_target = FALSE;
}
- /* Invoke the regular ELF backend linker to do all the work. */
- return _bfd_elf_link_check_relocs (abfd, info);
+ return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
}
static const struct bfd_elf_special_section
#define elf_info_to_howto elf_x86_64_info_to_howto
-#define bfd_elf64_bfd_link_hash_table_create \
- elf_x86_64_link_hash_table_create
#define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
#define bfd_elf64_bfd_reloc_name_lookup \
elf_x86_64_reloc_name_lookup
-#define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
#define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
#define elf_backend_check_relocs elf_x86_64_check_relocs
-#define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
#define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
#define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
#define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
#define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
-#define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
#define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
#define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
#ifdef CORE_HEADER
#define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
#define elf_backend_relocate_section elf_x86_64_relocate_section
#define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
-#define elf_backend_always_size_sections elf_x86_64_always_size_sections
#define elf_backend_init_index_section _bfd_elf_init_1_index_section
#define elf_backend_object_p elf64_x86_64_elf_object_p
-#define bfd_elf64_mkobject elf_x86_64_mkobject
#define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
-#define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs
#define elf_backend_section_from_shdr \
elf_x86_64_section_from_shdr
elf_x86_64_common_definition
#define elf_backend_merge_symbol \
elf_x86_64_merge_symbol
-#define elf_backend_merge_symbol_attribute \
- elf_x86_64_merge_symbol_attribute
#define elf_backend_special_sections \
elf_x86_64_special_sections
#define elf_backend_additional_program_headers \
elf_x86_64_additional_program_headers
-#define elf_backend_hash_symbol \
- elf_x86_64_hash_symbol
-#define elf_backend_omit_section_dynsym \
- ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
-#define elf_backend_fixup_symbol \
- elf_x86_64_fixup_symbol
-#define elf_backend_parse_gnu_properties \
- elf_x86_64_parse_gnu_properties
-#define elf_backend_merge_gnu_properties \
- elf_x86_64_merge_gnu_properties
#define elf_backend_setup_gnu_properties \
elf_x86_64_link_setup_gnu_properties
DW_CFA_nop, DW_CFA_nop
};
-static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt =
+static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt =
{
elf_x86_64_nacl_plt0_entry, /* plt0_entry */
+ NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */
elf_x86_64_nacl_plt_entry, /* plt_entry */
NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
2, /* plt0_got1_offset */
7, /* plt_got_insn_size */
42, /* plt_plt_insn_end */
32, /* plt_lazy_offset */
+ elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */
+ elf_x86_64_nacl_plt_entry, /* pic_plt_entry */
elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
};
#undef elf32_bed
#define elf32_bed elf32_x86_64_nacl_bed
-#define bfd_elf32_bfd_link_hash_table_create \
- elf_x86_64_link_hash_table_create
#define bfd_elf32_bfd_reloc_type_lookup \
elf_x86_64_reloc_type_lookup
#define bfd_elf32_bfd_reloc_name_lookup \
elf_x86_64_reloc_name_lookup
-#define bfd_elf32_mkobject \
- elf_x86_64_mkobject
#define bfd_elf32_get_synthetic_symtab \
elf_x86_64_get_synthetic_symtab
-#define bfd_elf32_bfd_link_check_relocs \
- elf_x86_64_link_check_relocs
#undef elf_backend_object_p
#define elf_backend_object_p \
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