Add support for x86_64-*-linux-gnu* target

1 files changed, 353 insertions, 0 deletions

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
new file mode 100644
index 0000000..09aecf9
--- /dev/null
+++ b/bfd/elf64-x86-64.c
@@ -0,0 +1,353 @@
+/* X86-64 specific support for 64-bit ELF
+   Copyright 2000 Free Software Foundation, Inc.
+   Contributed by Jan Hubicka <jh@suse.cz>.
+
+This file is part of BFD, the Binary File Descriptor library.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+
+#include "elf/x86-64.h"
+
+/* We use only the RELA entries.  */
+#define USE_RELA
+
+/* In case we're on a 32-bit machine, construct a 64-bit "-1" value.  */
+#define MINUS_ONE (~ (bfd_vma) 0)
+
+/* The relocation "howto" table.  Order of fields:
+   type, size, bitsize, pc_relative, complain_on_overflow, special_function,
+   name, partial_inplace, src_mask, dst_pack, pcrel_offset  */
+static reloc_howto_type x86_64_elf_howto_table[] =
+{
+  HOWTO(R_X86_64_NONE,          0,0, 0,false,0,complain_overflow_dont,    0, "R_X86_64_NONE",   false,0x00000000,0x00000000,false),
+  HOWTO(R_X86_64_64,    0,4,64,false,0,complain_overflow_bitfield,0, "R_X86_64_64",     false,MINUS_ONE ,MINUS_ONE ,false),
+  HOWTO(R_X86_64_PC32,          0,4,32,true ,0,complain_overflow_signed  ,0, "R_X86_64_PC32",   false,0xffffffff,0xffffffff,true),
+  HOWTO(R_X86_64_GOT32,         0,4,32,false,0,complain_overflow_signed  ,0, "R_X86_64_GOT32",  false,0xffffffff,0xffffffff,false),
+  HOWTO(R_X86_64_PLT32,         0,4,32,true ,0,complain_overflow_signed  ,0, "R_X86_64_PLT32",  false,0xffffffff,0xffffffff,true),
+  HOWTO(R_X86_64_COPY,     0,4,32,false,0,complain_overflow_bitfield,0, "R_X86_64_COPY",   false,0xffffffff,0xffffffff,false),
+  HOWTO(R_X86_64_GLOB_DAT, 0,4,64,false,0,complain_overflow_bitfield,0,"R_X86_64_GLOB_DAT",false,MINUS_ONE ,MINUS_ONE ,false),
+  HOWTO(R_X86_64_RELATIVE ,0,4,64,false,0,complain_overflow_bitfield,0,"R_X86_64_RELATIVE",false,MINUS_ONE ,MINUS_ONE ,false),
+  HOWTO(R_X86_64_JUMP_SLOT,0,4,64,false,0,complain_overflow_bitfield,0,"R_X86_64_JUMP_SLOT",false,MINUS_ONE,MINUS_ONE ,false),
+  HOWTO(R_X86_64_GOTPCREL, 0,4,32,true, 0,complain_overflow_signed  ,0, "R_X86_64_PCREL",  false,0xffffffff,0xffffffff,true),
+  HOWTO(R_X86_64_32,    0,4,32,false,0,complain_overflow_unsigned,0, "R_X86_64_32",     false,0xffffffff,0xffffffff,false),
+  HOWTO(R_X86_64_32S,   0,4,32,false,0,complain_overflow_signed,  0, "R_X86_64_32S",    false,0xffffffff,0xffffffff,false),
+  HOWTO(R_X86_64_16,    0,1,16,false,0,complain_overflow_bitfield,0, "R_X86_64_16",     false,0xffff    ,0xffff,    false),
+  HOWTO(R_X86_64_PC16,          0,1,16,true ,0,complain_overflow_bitfield,0, "R_X86_64_PC16",   false,0xffff    ,0xffff,    true),
+  HOWTO(R_X86_64_8,     0,0, 8,false,0,complain_overflow_signed  ,0, "R_X86_64_8",      false,0xff      ,0xff,      false),
+  HOWTO(R_X86_64_PC8,   0,0, 8,true ,0,complain_overflow_signed  ,0, "R_X86_64_PC8",    false,0xff      ,0xff,      true),
+};
+
+/* Map BFD relocs to the x86_64 elf relocs.  */
+struct elf_reloc_map {
+  bfd_reloc_code_real_type bfd_reloc_val;
+  unsigned char elf_reloc_val;
+};
+
+static CONST struct elf_reloc_map x86_64_reloc_map[] =
+{
+  { BFD_RELOC_NONE,           R_X86_64_NONE, },
+  { BFD_RELOC_64,             R_X86_64_64,   },
+  { BFD_RELOC_32_PCREL,               R_X86_64_PC32, },
+  { BFD_RELOC_X86_64_GOT32,   R_X86_64_GOT32,},
+  { BFD_RELOC_X86_64_PLT32,   R_X86_64_PLT32,},
+  { BFD_RELOC_X86_64_COPY,    R_X86_64_COPY, },
+  { BFD_RELOC_X86_64_GLOB_DAT,        R_X86_64_GLOB_DAT, },
+  { BFD_RELOC_X86_64_JUMP_SLOT,       R_X86_64_JUMP_SLOT, },
+  { BFD_RELOC_X86_64_RELATIVE,        R_X86_64_RELATIVE, },
+  { BFD_RELOC_X86_64_GOTPCREL,        R_X86_64_GOTPCREL, },
+  { BFD_RELOC_32,             R_X86_64_32, },
+  { BFD_RELOC_X86_64_32S,     R_X86_64_32S, },
+  { BFD_RELOC_16,             R_X86_64_16, },
+  { BFD_RELOC_16_PCREL,               R_X86_64_PC16, },
+  { BFD_RELOC_8,              R_X86_64_8, },
+  { BFD_RELOC_8_PCREL,                R_X86_64_PC8, },
+};
+
+
+static reloc_howto_type *elf64_x86_64_reloc_type_lookup
+  PARAMS ((bfd *, bfd_reloc_code_real_type));
+static void elf64_x86_64_info_to_howto
+  PARAMS ((bfd *, arelent *, Elf64_Internal_Rela *));
+static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create
+  PARAMS ((bfd *));
+static boolean elf64_x86_64_relocate_section
+  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+         Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+
+/* Given a BFD reloc type, return a HOWTO structure.  */
+static reloc_howto_type *
+elf64_x86_64_reloc_type_lookup (abfd, code)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     bfd_reloc_code_real_type code;
+{
+  unsigned int i;
+  for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
+       i++)
+    {
+      if (x86_64_reloc_map[i].bfd_reloc_val == code)
+      return &x86_64_elf_howto_table[(int)
+                                     x86_64_reloc_map[i].elf_reloc_val];
+    }
+  return 0;
+}
+
+
+/* Given an x86_64 ELF reloc type, fill in an arelent structure.  */
+static void
+elf64_x86_64_info_to_howto (abfd, cache_ptr, dst)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     arelent *cache_ptr;
+     Elf64_Internal_Rela *dst;
+{
+  unsigned r_type;
+
+  r_type = ELF64_R_TYPE (dst->r_info);
+  BFD_ASSERT (r_type < (unsigned int) R_X86_64_max);
+  cache_ptr->howto = &x86_64_elf_howto_table[r_type];
+  BFD_ASSERT (r_type == cache_ptr->howto->type);
+}
+
+/* Hash table functions - these will be used by dynamic linking code and
+   right now they are needed to keep ld happy.  */
+
+/* x86_64  ELF linker hash table.  */
+
+struct elf64_x86_64_link_hash_table
+{
+  struct elf_link_hash_table root;
+};
+
+
+/* Get the X86-64 ELF linker hash table from a link_info structure.  */
+
+#define elf64_x86_64_hash_table(p) \
+  ((struct elf64_x86_64_link_hash_table *) ((p)->hash))
+
+/* Create an X86-64 ELF linker hash table.  */
+
+static struct bfd_link_hash_table *
+elf64_x86_64_link_hash_table_create (abfd)
+     bfd *abfd;
+{
+  struct elf64_x86_64_link_hash_table *ret;
+
+  ret = ((struct elf64_x86_64_link_hash_table *)
+       bfd_alloc (abfd, sizeof (struct elf64_x86_64_link_hash_table)));
+  if (ret == (struct elf64_x86_64_link_hash_table *) NULL)
+    return NULL;
+
+  if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
+                                     _bfd_elf_link_hash_newfunc))
+    {
+      bfd_release (abfd, ret);
+      return NULL;
+    }
+
+  return &ret->root.root;
+}
+
+boolean
+elf64_x86_64_elf_object_p (abfd)
+     bfd *abfd;
+{
+  /* Set the right machine number for an x86-64 elf64 file.  */
+  bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
+  return true;
+}
+
+/* Relocate an x86_64 ELF section.  */
+
+static boolean
+elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
+                             contents, relocs, local_syms, local_sections)
+     bfd *output_bfd;
+     struct bfd_link_info *info;
+     bfd *input_bfd;
+     asection *input_section;
+     bfd_byte *contents;
+     Elf_Internal_Rela *relocs;
+     Elf_Internal_Sym *local_syms;
+     asection **local_sections;
+{
+  bfd *dynobj;
+  Elf_Internal_Shdr *symtab_hdr;
+  struct elf_link_hash_entry **sym_hashes;
+  bfd_vma *local_got_offsets;
+  asection *sreloc;
+  Elf_Internal_Rela *rel;
+  Elf_Internal_Rela *relend;
+
+  dynobj = elf_hash_table (info)->dynobj;
+  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (input_bfd);
+  local_got_offsets = elf_local_got_offsets (input_bfd);
+
+  sreloc = NULL;
+  if (dynobj != NULL)
+    abort ();
+
+  rel = relocs;
+  relend = relocs + input_section->reloc_count;
+  for (; rel < relend; rel++)
+    {
+      int r_type;
+      reloc_howto_type *howto;
+      unsigned long r_symndx;
+      struct elf_link_hash_entry *h;
+      Elf_Internal_Sym *sym;
+      asection *sec;
+      bfd_vma relocation;
+      bfd_reloc_status_type r;
+      unsigned int indx;
+
+      r_type = ELF64_R_TYPE (rel->r_info);
+
+      if ((indx = (unsigned) r_type) >= R_X86_64_max)
+      {
+        bfd_set_error (bfd_error_bad_value);
+        return false;
+      }
+      howto = x86_64_elf_howto_table + indx;
+
+      r_symndx = ELF64_R_SYM (rel->r_info);
+
+      if (info->relocateable)
+      {
+        /* This is a relocateable link.  We don't have to change
+           anything, unless the reloc is against a section symbol,
+           in which case we have to adjust according to where the
+           section symbol winds up in the output section.  */
+        if (r_symndx < symtab_hdr->sh_info)
+          {
+            sym = local_syms + r_symndx;
+            if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+              {
+                sec = local_sections[r_symndx];
+                rel->r_addend += sec->output_offset + sym->st_value;
+              }
+          }
+
+        continue;
+      }
+
+      /* This is a final link.  */
+      h = NULL;
+      sym = NULL;
+      sec = NULL;
+      if (r_symndx < symtab_hdr->sh_info)
+      {
+        sym = local_syms + r_symndx;
+        sec = local_sections[r_symndx];
+        relocation = (sec->output_section->vma
+                      + sec->output_offset
+                      + sym->st_value);
+      }
+      else
+      {
+        h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+        while (h->root.type == bfd_link_hash_indirect
+               || h->root.type == bfd_link_hash_warning)
+          h = (struct elf_link_hash_entry *) h->root.u.i.link;
+        if (h->root.type == bfd_link_hash_defined
+            || h->root.type == bfd_link_hash_defweak)
+          {
+            sec = h->root.u.def.section;
+            if (sec->output_section == NULL)
+              {
+                (*_bfd_error_handler)
+                  (_("%s: warning: unresolvable relocation against symbol `%s' from %s section"),
+                   bfd_get_filename (input_bfd), h->root.root.string,
+                   bfd_get_section_name (input_bfd, input_section));
+                relocation = 0;
+              }
+            else
+              relocation = (h->root.u.def.value
+                            + sec->output_section->vma
+                            + sec->output_offset);
+          }
+        else if (h->root.type == bfd_link_hash_undefweak)
+          relocation = 0;
+        else
+          {
+            if (! ((*info->callbacks->undefined_symbol)
+                   (info, h->root.root.string, input_bfd,
+                    input_section, rel->r_offset,
+                    (!info->shared || info->no_undefined
+                     || ELF_ST_VISIBILITY (h->other)))))
+              return false;
+            relocation = 0;
+          }
+      }
+      /* This function should support shared objects, but don't.  */
+      if (info->shared)
+      abort();
+
+      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+                                  contents, rel->r_offset,
+                                  relocation, rel->r_addend);
+
+      if (r != bfd_reloc_ok)
+      {
+        switch (r)
+          {
+          default:
+          case bfd_reloc_outofrange:
+            abort ();
+          case bfd_reloc_overflow:
+            {
+              const char *name;
+
+              if (h != NULL)
+                name = h->root.root.string;
+              else
+                {
+                  name = bfd_elf_string_from_elf_section (input_bfd,
+                                                          symtab_hdr->sh_link,
+                                                          sym->st_name);
+                  if (name == NULL)
+                    return false;
+                  if (*name == '\0')
+                    name = bfd_section_name (input_bfd, sec);
+                }
+              if (! ((*info->callbacks->reloc_overflow)
+                     (info, name, howto->name, (bfd_vma) 0,
+                      input_bfd, input_section, rel->r_offset)))
+                return false;
+            }
+            break;
+          }
+      }
+    }
+  return true;
+}
+
+
+#define TARGET_LITTLE_SYM             bfd_elf64_x86_64_vec
+#define TARGET_LITTLE_NAME            "elf64-x86-64"
+#define ELF_ARCH                      bfd_arch_i386
+#define ELF_MACHINE_CODE              EM_X86_64
+#define ELF_MAXPAGESIZE                       0x100000
+#define elf_info_to_howto             elf64_x86_64_info_to_howto
+#define bfd_elf64_bfd_reloc_type_lookup       elf64_x86_64_reloc_type_lookup
+#define elf_backend_object_p            elf64_x86_64_elf_object_p
+#define elf_backend_relocate_section  elf64_x86_64_relocate_section
+#define bfd_elf64_bfd_link_hash_table_create elf64_x86_64_link_hash_table_create
+
+#include "elf64-target.h"