Fix @pltoff linker segfault for non-shared link.
[deliverable/binutils-gdb.git] / bfd / elfxx-ia64.c
index 332e361024bfa64e670a59a651755ebd5107be10..37b0d24ade32c950fde4ca3487863ba5238e47bb 100644 (file)
@@ -1,5 +1,6 @@
 /* IA-64 support for 64-bit ELF
-   Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+   Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
 
    This file is part of BFD, the Binary File Descriptor library.
@@ -185,13 +186,13 @@ static bfd_boolean is_unwind_section_name
 static bfd_boolean elfNN_ia64_section_from_shdr
   PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
 static bfd_boolean elfNN_ia64_section_flags
-  PARAMS ((flagword *, Elf_Internal_Shdr *));
+  PARAMS ((flagword *, const Elf_Internal_Shdr *));
 static bfd_boolean elfNN_ia64_fake_sections
   PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec));
 static void elfNN_ia64_final_write_processing
   PARAMS ((bfd *abfd, bfd_boolean linker));
 static bfd_boolean elfNN_ia64_add_symbol_hook
-  PARAMS ((bfd *abfd, struct bfd_link_info *info, const Elf_Internal_Sym *sym,
+  PARAMS ((bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *sym,
           const char **namep, flagword *flagsp, asection **secp,
           bfd_vma *valp));
 static int elfNN_ia64_additional_program_headers
@@ -635,7 +636,7 @@ static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] =
 static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] =
 {
   0x0b, 0x78, 0x00, 0x02, 0x00, 0x24,  /*   [MMI]       addl r15=0,r1;;    */
-  0x00, 0x41, 0x3c, 0x30, 0x28, 0xc0,  /*               ld8 r16=[r15],8    */
+  0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0,  /*               ld8.acq r16=[r15],8*/
   0x01, 0x08, 0x00, 0x84,              /*               mov r14=r1;;       */
   0x11, 0x08, 0x00, 0x1e, 0x18, 0x10,  /*   [MIB]       ld8 r1=[r15]       */
   0x60, 0x80, 0x04, 0x80, 0x03, 0x00,  /*               mov b6=r16         */
@@ -748,11 +749,6 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
          && sec->need_finalize_relax == 0))
     return TRUE;
 
-  /* If this is the first time we have been called for this section,
-     initialize the cooked size.  */
-  if (sec->_cooked_size == 0)
-    sec->_cooked_size = sec->_raw_size;
-
   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
 
   /* Load the relocations for this section.  */
@@ -770,12 +766,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
     contents = elf_section_data (sec)->this_hdr.contents;
   else
     {
-      contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
-      if (contents == NULL)
-       goto error_return;
-
-      if (! bfd_get_section_contents (abfd, sec, contents,
-                                     (file_ptr) 0, sec->_raw_size))
+      if (!bfd_malloc_and_get_section (abfd, sec, &contents))
        goto error_return;
     }
 
@@ -788,6 +779,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
       bfd_size_type amt;
       bfd_boolean is_branch;
       struct elfNN_ia64_dyn_sym_info *dyn_i;
+      char symtype;
 
       switch (r_type)
        {
@@ -863,6 +855,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
 
          toff = isym->st_value;
          dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, FALSE);
+         symtype = ELF_ST_TYPE (isym->st_info);
        }
       else
        {
@@ -907,13 +900,38 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
              tsec = h->root.u.def.section;
              toff = h->root.u.def.value;
            }
+
+         symtype = h->type;
        }
 
       if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
-       toff = _bfd_merged_section_offset (abfd, &tsec,
-                                          elf_section_data (tsec)->sec_info,
-                                          toff + irel->r_addend,
-                                          (bfd_vma) 0);
+       {
+         /* At this stage in linking, no SEC_MERGE symbol has been
+            adjusted, so all references to such symbols need to be
+            passed through _bfd_merged_section_offset.  (Later, in
+            relocate_section, all SEC_MERGE symbols *except* for
+            section symbols have been adjusted.)
+
+            gas may reduce relocations against symbols in SEC_MERGE
+            sections to a relocation against the section symbol when
+            the original addend was zero.  When the reloc is against
+            a section symbol we should include the addend in the
+            offset passed to _bfd_merged_section_offset, since the
+            location of interest is the original symbol.  On the
+            other hand, an access to "sym+addend" where "sym" is not
+            a section symbol should not include the addend;  Such an
+            access is presumed to be an offset from "sym";  The
+            location of interest is just "sym".  */
+          if (symtype == STT_SECTION)
+            toff += irel->r_addend;
+          
+          toff = _bfd_merged_section_offset (abfd, &tsec,
+                                             elf_section_data (tsec)->sec_info,
+                                             toff);
+
+          if (symtype != STT_SECTION)
+            toff += irel->r_addend;
+       }
       else
        toff += irel->r_addend;
 
@@ -925,6 +943,19 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
        {
          bfd_signed_vma offset;
 
+         /* We can't put a trampoline in a .init/.fini section. Issue
+            an error.  */
+         if (strcmp (sec->output_section->name, ".init") == 0
+             || strcmp (sec->output_section->name, ".fini") == 0)
+           {
+             (*_bfd_error_handler)
+               (_("%s: Can't relax br at 0x%lx in section `%s'. Please use brl or indirect branch."),
+                bfd_archive_filename (sec->owner),
+                (unsigned long) roff, sec->name);
+             bfd_set_error (bfd_error_bad_value);
+             goto error_return;
+           }
+
          reladdr = (sec->output_section->vma
                     + sec->output_offset
                     + roff) & (bfd_vma) -4;
@@ -978,7 +1009,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
                size = oor_branch_size;
 
              /* Resize the current section to make room for the new branch. */
-             trampoff = (sec->_cooked_size + 15) & (bfd_vma) -16;
+             trampoff = (sec->size + 15) & (bfd_vma) -16;
 
              /* If trampoline is out of range, there is nothing we
                 can do.  */
@@ -990,7 +1021,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
              contents = (bfd_byte *) bfd_realloc (contents, amt);
              if (contents == NULL)
                goto error_return;
-             sec->_cooked_size = amt;
+             sec->size = amt;
 
              if (tsec == ia64_info->plt_sec)
                {
@@ -1146,8 +1177,7 @@ elfNN_ia64_relax_section (abfd, sec, link_info, again)
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
-      ia64_info->got_sec->_raw_size = data.ofs;
-      ia64_info->got_sec->_cooked_size = data.ofs;
+      ia64_info->got_sec->size = data.ofs;
 
       /* ??? Resize .rela.got too.  */
     }
@@ -1270,7 +1300,7 @@ elfNN_ia64_section_from_shdr (abfd, hdr, name)
 static bfd_boolean
 elfNN_ia64_section_flags (flags, hdr)
      flagword *flags;
-     Elf_Internal_Shdr *hdr;
+     const Elf_Internal_Shdr *hdr;
 {
   if (hdr->sh_flags & SHF_IA_64_SHORT)
     *flags |= SEC_SMALL_DATA;
@@ -1429,7 +1459,7 @@ static bfd_boolean
 elfNN_ia64_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
      bfd *abfd;
      struct bfd_link_info *info;
-     const Elf_Internal_Sym *sym;
+     Elf_Internal_Sym *sym;
      const char **namep ATTRIBUTE_UNUSED;
      flagword *flagsp ATTRIBUTE_UNUSED;
      asection **secp;
@@ -2218,7 +2248,7 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
   const Elf_Internal_Rela *relend;
   Elf_Internal_Shdr *symtab_hdr;
   const Elf_Internal_Rela *rel;
-  asection *got, *fptr, *srel;
+  asection *got, *fptr, *srel, *pltoff;
 
   if (info->relocatable)
     return TRUE;
@@ -2226,7 +2256,7 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
   ia64_info = elfNN_ia64_hash_table (info);
 
-  got = fptr = srel = NULL;
+  got = fptr = srel = pltoff = NULL;
 
   relend = relocs + sec->reloc_count;
   for (rel = relocs; rel < relend; ++rel)
@@ -2458,7 +2488,7 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
             dynamic symbol table.  */
          if (!h && info->shared)
            {
-             if (! (_bfd_elfNN_link_record_local_dynamic_symbol
+             if (! (bfd_elf_link_record_local_dynamic_symbol
                     (info, abfd, (long) r_symndx)))
                return FALSE;
            }
@@ -2477,7 +2507,18 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
       if (need_entry & NEED_FULL_PLT)
        dyn_i->want_plt2 = 1;
       if (need_entry & NEED_PLTOFF)
-       dyn_i->want_pltoff = 1;
+       {
+         /* This is needed here, in case @pltoff is used in a non-shared
+            link.  */
+         if (!pltoff)
+           {
+             pltoff = get_pltoff (abfd, info, ia64_info);
+             if (!pltoff)
+               return FALSE;
+           }
+         
+         dyn_i->want_pltoff = 1;
+       }
       if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC))
        {
          if (!srel)
@@ -2487,7 +2528,7 @@ elfNN_ia64_check_relocs (abfd, info, sec, relocs)
                return FALSE;
            }
          if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type,
-                               (sec->flags & SEC_READONLY)))
+                               (sec->flags & SEC_READONLY) != 0))
            return FALSE;
        }
     }
@@ -2630,7 +2671,7 @@ allocate_fptr (dyn_i, data)
              BFD_ASSERT ((h->root.type == bfd_link_hash_defined)
                          || (h->root.type == bfd_link_hash_defweak));
 
-             if (!_bfd_elfNN_link_record_local_dynamic_symbol
+             if (!bfd_elf_link_record_local_dynamic_symbol
                    (x->info, h->root.u.def.section->owner,
                     global_sym_index (h)))
                return FALSE;
@@ -2796,7 +2837,7 @@ allocate_dynrel_entries (dyn_i, data)
        }
       if (rent->reltext)
        ia64_info->reltext = 1;
-      rent->srel->_raw_size += sizeof (ElfNN_External_Rela) * count;
+      rent->srel->size += sizeof (ElfNN_External_Rela) * count;
     }
 
   /* Take care of the GOT and PLT relocations.  */
@@ -2812,18 +2853,18 @@ allocate_dynrel_entries (dyn_i, data)
          || !x->info->pie
          || dyn_i->h == NULL
          || dyn_i->h->root.type != bfd_link_hash_undefweak)
-       ia64_info->rel_got_sec->_raw_size += sizeof (ElfNN_External_Rela);
+       ia64_info->rel_got_sec->size += sizeof (ElfNN_External_Rela);
     }
   if ((dynamic_symbol || shared) && dyn_i->want_tprel)
-    ia64_info->rel_got_sec->_raw_size += sizeof (ElfNN_External_Rela);
+    ia64_info->rel_got_sec->size += sizeof (ElfNN_External_Rela);
   if (dynamic_symbol && dyn_i->want_dtpmod)
-    ia64_info->rel_got_sec->_raw_size += sizeof (ElfNN_External_Rela);
+    ia64_info->rel_got_sec->size += sizeof (ElfNN_External_Rela);
   if (dynamic_symbol && dyn_i->want_dtprel)
-    ia64_info->rel_got_sec->_raw_size += sizeof (ElfNN_External_Rela);
+    ia64_info->rel_got_sec->size += sizeof (ElfNN_External_Rela);
   if (ia64_info->rel_fptr_sec && dyn_i->want_fptr)
     {
       if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak)
-       ia64_info->rel_fptr_sec->_raw_size += sizeof (ElfNN_External_Rela);
+       ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela);
     }
 
   if (!resolved_zero && dyn_i->want_pltoff)
@@ -2838,7 +2879,7 @@ allocate_dynrel_entries (dyn_i, data)
       else if (shared)
        t = 2 * sizeof (ElfNN_External_Rela);
 
-      ia64_info->rel_pltoff_sec->_raw_size += t;
+      ia64_info->rel_pltoff_sec->size += t;
     }
 
   return TRUE;
@@ -2898,7 +2939,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
       sec = bfd_get_section_by_name (dynobj, ".interp");
       BFD_ASSERT (sec != NULL);
       sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
-      sec->_raw_size = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
+      sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
     }
 
   /* Allocate the GOT entries.  */
@@ -2909,7 +2950,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
-      ia64_info->got_sec->_raw_size = data.ofs;
+      ia64_info->got_sec->size = data.ofs;
     }
 
   /* Allocate the FPTR entries.  */
@@ -2918,7 +2959,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
     {
       data.ofs = 0;
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data);
-      ia64_info->fptr_sec->_raw_size = data.ofs;
+      ia64_info->fptr_sec->size = data.ofs;
     }
 
   /* Now that we've seen all of the input files, we can decide which
@@ -2940,16 +2981,20 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
   data.ofs = (data.ofs + 31) & (bfd_vma) -32;
 
   elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data);
-  if (data.ofs != 0)
+  if (data.ofs != 0 || ia64_info->root.dynamic_sections_created)
     {
+      /* FIXME: we always reserve the memory for dynamic linker even if
+        there are no PLT entries since dynamic linker may assume the
+        reserved memory always exists.  */
+
       BFD_ASSERT (ia64_info->root.dynamic_sections_created);
 
-      ia64_info->plt_sec->_raw_size = data.ofs;
+      ia64_info->plt_sec->size = data.ofs;
 
       /* If we've got a .plt, we need some extra memory for the dynamic
         linker.  We stuff these in .got.plt.  */
       sec = bfd_get_section_by_name (dynobj, ".got.plt");
-      sec->_raw_size = 8 * PLT_RESERVED_WORDS;
+      sec->size = 8 * PLT_RESERVED_WORDS;
     }
 
   /* Allocate the PLTOFF entries.  */
@@ -2958,7 +3003,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
     {
       data.ofs = 0;
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data);
-      ia64_info->pltoff_sec->_raw_size = data.ofs;
+      ia64_info->pltoff_sec->size = data.ofs;
     }
 
   if (ia64_info->root.dynamic_sections_created)
@@ -2967,7 +3012,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
         required.  */
 
       if (info->shared && ia64_info->self_dtpmod_offset != (bfd_vma) -1)
-       ia64_info->rel_got_sec->_raw_size += sizeof (ElfNN_External_Rela);
+       ia64_info->rel_got_sec->size += sizeof (ElfNN_External_Rela);
       elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data);
     }
 
@@ -2988,7 +3033,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
         function which decides whether anything needs to go into
         these sections.  */
 
-      strip = (sec->_raw_size == 0);
+      strip = (sec->size == 0);
 
       if (sec == ia64_info->got_sec)
        strip = FALSE;
@@ -3065,8 +3110,8 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
       else
        {
          /* Allocate memory for the section contents.  */
-         sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->_raw_size);
-         if (sec->contents == NULL && sec->_raw_size != 0)
+         sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size);
+         if (sec->contents == NULL && sec->size != 0)
            return FALSE;
        }
     }
@@ -3082,7 +3127,7 @@ elfNN_ia64_size_dynamic_sections (output_bfd, info)
          /* The DT_DEBUG entry is filled in by the dynamic linker and used
             by the debugger.  */
 #define add_dynamic_entry(TAG, VAL) \
-  bfd_elfNN_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
+  _bfd_elf_add_dynamic_entry (info, TAG, VAL)
 
          if (!add_dynamic_entry (DT_DEBUG, 0))
            return FALSE;
@@ -3377,8 +3422,7 @@ elfNN_ia64_install_dyn_reloc (abfd, info, sec, srel, offset, type,
   loc = srel->contents;
   loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela);
   bfd_elfNN_swap_reloca_out (abfd, &outrel, loc);
-  BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count
-             <= srel->_cooked_size);
+  BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size);
 }
 
 /* Store an entry for target address TARGET_ADDR in the linkage table
@@ -3694,7 +3738,7 @@ elfNN_ia64_choose_gp (abfd, info)
        continue;
 
       lo = os->vma;
-      hi = os->vma + os->_raw_size;
+      hi = os->vma + os->size;
       if (hi < lo)
        hi = (bfd_vma) -1;
 
@@ -3830,27 +3874,27 @@ elfNN_ia64_final_link (abfd, info)
        {
          unwind_output_sec = s->output_section;
          unwind_output_sec->contents
-           = bfd_malloc (unwind_output_sec->_raw_size);
+           = bfd_malloc (unwind_output_sec->size);
          if (unwind_output_sec->contents == NULL)
            return FALSE;
        }
     }
 
   /* Invoke the regular ELF backend linker to do all the work.  */
-  if (!bfd_elfNN_bfd_final_link (abfd, info))
+  if (!bfd_elf_final_link (abfd, info))
     return FALSE;
 
   if (unwind_output_sec)
     {
       elfNN_ia64_unwind_entry_compare_bfd = abfd;
       qsort (unwind_output_sec->contents,
-            (size_t) (unwind_output_sec->_raw_size / 24),
+            (size_t) (unwind_output_sec->size / 24),
             24,
             elfNN_ia64_unwind_entry_compare);
 
       if (! bfd_set_section_contents (abfd, unwind_output_sec,
                                      unwind_output_sec->contents, (bfd_vma) 0,
-                                     unwind_output_sec->_raw_size))
+                                     unwind_output_sec->size))
        return FALSE;
     }
 
@@ -3958,8 +4002,7 @@ elfNN_ia64_relocate_section (output_bfd, info, input_bfd, input_section,
                                                    elf_section_data (msec)->
                                                    sec_info,
                                                    sym->st_value
-                                                   + dynent->addend,
-                                                   (bfd_vma) 0);
+                                                   + dynent->addend);
                      dynent->addend -= sym->st_value;
                      dynent->addend += msec->output_section->vma
                                        + msec->output_offset
@@ -3974,12 +4017,12 @@ elfNN_ia64_relocate_section (output_bfd, info, input_bfd, input_section,
        {
          bfd_boolean unresolved_reloc;
          bfd_boolean warned;
+         struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
 
-         RELOC_FOR_GLOBAL_SYMBOL (h, elf_sym_hashes (input_bfd),
-                                  r_symndx,
-                                  symtab_hdr, value, sym_sec,
-                                  unresolved_reloc, info,
-                                  warned);
+         RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+                                  r_symndx, symtab_hdr, sym_hashes,
+                                  h, sym_sec, value,
+                                  unresolved_reloc, warned);
 
          if (h->root.type == bfd_link_hash_undefweak)
            undef_weak_ref = TRUE;
@@ -4595,7 +4638,7 @@ elfNN_ia64_finish_dynamic_symbol (output_bfd, info, h, sym)
          /* Mark the symbol as undefined, rather than as defined in the
             plt section.  Leave the value alone.  */
          /* ??? We didn't redefine it in adjust_dynamic_symbol in the
-            first place.  But perhaps elflink.h did some for us.  */
+            first place.  But perhaps elflink.c did some for us.  */
          if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
            sym->st_shndx = SHN_UNDEF;
        }
@@ -4656,7 +4699,7 @@ elfNN_ia64_finish_dynamic_sections (abfd, info)
       sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
       BFD_ASSERT (sdyn != NULL);
       dyncon = (ElfNN_External_Dyn *) sdyn->contents;
-      dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+      dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
 
       gp_val = _bfd_get_gp_value (abfd);
 
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