gas/

[deliverable/binutils-gdb.git] / bfd / elf64-x86-64.c

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 3a24ccae578f2cb9f609f787d6b434c7a5a3ff93..83656aead16327b6f49746ee9c3341b78ed3443a 100644 (file)
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -308,7 +308,7 @@ elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
          = bfd_get_16 (abfd, note->descdata + 12);
 
        /* pr_pid */
-       elf_tdata (abfd)->core_pid
+       elf_tdata (abfd)->core_lwpid
          = bfd_get_32 (abfd, note->descdata + 32);
 
        /* pr_reg */
@@ -332,6 +332,8 @@ elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
        return FALSE;
 
       case 136:                /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
+       elf_tdata (abfd)->core_pid
+         = bfd_get_32 (abfd, note->descdata + 24);
        elf_tdata (abfd)->core_program
         = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
        elf_tdata (abfd)->core_command
@@ -603,8 +605,6 @@ elf64_x86_64_get_local_sym_hash (struct elf64_x86_64_link_hash_table *htab,
       ret->elf.indx = sec->id;
       ret->elf.dynstr_index = ELF64_R_SYM (rel->r_info);
       ret->elf.dynindx = -1;
-      ret->elf.plt.offset = (bfd_vma) -1;
-      ret->elf.got.offset = (bfd_vma) -1;
       *slot = ret;
     }
   return &ret->elf;
@@ -951,6 +951,12 @@ elf64_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
   unsigned int to_type = from_type;
   bfd_boolean check = TRUE;
 
+  /* Skip TLS transition for functions.  */
+  if (h != NULL
+      && (h->type == STT_FUNC
+         || h->type == STT_GNU_IFUNC))
+    return TRUE;
+
   switch (from_type)
     {
     case R_X86_64_TLSGD:
@@ -1657,6 +1663,24 @@ elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
                break;
              }
        }
+      else
+       {
+         /* A local symbol.  */
+         Elf_Internal_Sym *isym;
+
+         isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+                                       abfd, r_symndx);
+
+         /* Check relocation against local STT_GNU_IFUNC symbol.  */
+         if (isym != NULL
+             && ELF64_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+           {
+             h = elf64_x86_64_get_local_sym_hash (htab, abfd, rel,
+                                                  FALSE);
+             if (h == NULL)
+               abort ();
+           }
+       }
 
       r_type = ELF64_R_TYPE (rel->r_info);
       if (! elf64_x86_64_tls_transition (info, abfd, sec, NULL,
@@ -1687,6 +1711,11 @@ elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
                h->plt.refcount -= 1;
              if (h->got.refcount > 0)
                h->got.refcount -= 1;
+             if (h->type == STT_GNU_IFUNC)
+               {
+                 if (h->plt.refcount > 0)
+                   h->plt.refcount -= 1;
+               }
            }
          else if (local_got_refcounts != NULL)
            {
@@ -2347,6 +2376,30 @@ elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
        }
     }
 
+  if (htab->elf.sgotplt)
+    {
+      struct elf_link_hash_entry *got;
+      got = elf_link_hash_lookup (elf_hash_table (info),
+                                 "_GLOBAL_OFFSET_TABLE_",
+                                 FALSE, FALSE, FALSE);
+
+      /* Don't allocate .got.plt section if there are no GOT nor PLT
+         entries and there is no refeence to _GLOBAL_OFFSET_TABLE_.  */
+      if ((got == NULL
+          || !got->ref_regular_nonweak)
+         && (htab->elf.sgotplt->size
+             == get_elf_backend_data (output_bfd)->got_header_size)
+         && (htab->elf.splt == NULL
+             || htab->elf.splt->size == 0)
+         && (htab->elf.sgot == NULL
+             || htab->elf.sgot->size == 0)
+         && (htab->elf.iplt == NULL
+             || htab->elf.iplt->size == 0)
+         && (htab->elf.igotplt == NULL
+             || htab->elf.igotplt->size == 0))
+       htab->elf.sgotplt->size = 0;
+    }
+
   /* We now have determined the sizes of the various dynamic sections.
      Allocate memory for them.  */
   relocs = FALSE;
@@ -2554,11 +2607,16 @@ static bfd_vma
 elf64_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
 {
   struct elf_link_hash_table *htab = elf_hash_table (info);
+  const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
+  bfd_vma static_tls_size;
 
   /* If tls_segment is NULL, we should have signalled an error already.  */
   if (htab->tls_sec == NULL)
     return 0;
-  return address - htab->tls_size - htab->tls_sec->vma;
+
+  /* Consider special static TLS alignment requirements.  */
+  static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
+  return address - static_tls_size - htab->tls_sec->vma;
 }
 
 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
@@ -2685,15 +2743,8 @@ elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
        }
 
       if (sec != NULL && elf_discarded_section (sec))
-       {
-         /* For relocs against symbols from removed linkonce sections,
-            or sections discarded by a linker script, we just want the
-            section contents zeroed.  Avoid any special processing.  */
-         _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
-         rel->r_info = 0;
-         rel->r_addend = 0;
-         continue;
-       }
+       RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+                                        rel, relend, howto, contents);
 
       if (info->relocatable)
        continue;
@@ -4149,6 +4200,13 @@ elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *inf
 
   if (htab->elf.sgotplt)
     {
+      if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
+       {
+         (*_bfd_error_handler)
+           (_("discarded output section: `%A'"), htab->elf.sgotplt);
+         return FALSE;
+       }
+
       /* Fill in the first three entries in the global offset table.  */
       if (htab->elf.sgotplt->size > 0)
        {
@@ -4410,6 +4468,7 @@ static const struct bfd_elf_special_section
 #define TARGET_LITTLE_SYM                  bfd_elf64_x86_64_vec
 #define TARGET_LITTLE_NAME                 "elf64-x86-64"
 #define ELF_ARCH                           bfd_arch_i386
+#define ELF_TARGET_ID                      X86_64_ELF_DATA
 #define ELF_MACHINE_CODE                   EM_X86_64
 #define ELF_MAXPAGESIZE                            0x200000
 #define ELF_MINPAGESIZE                            0x1000
@@ -4511,6 +4570,11 @@ static const struct bfd_elf_special_section
 #undef  elf64_bed
 #define elf64_bed                          elf64_x86_64_sol2_bed
 
+/* The 64-bit static TLS arena size is rounded to the nearest 16-byte
+   boundary.  */
+#undef elf_backend_static_tls_alignment
+#define elf_backend_static_tls_alignment    16
+
 /* The Solaris 2 ABI requires a plt symbol on all platforms.
 
    Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
@@ -4549,6 +4613,7 @@ elf64_l1om_elf_object_p (bfd *abfd)
 #define elf_backend_object_p               elf64_l1om_elf_object_p
 
 #undef  elf_backend_post_process_headers
+#undef  elf_backend_static_tls_alignment
 
 #include "elf64-target.h"