2001-04-23 Bo Thorsen <bo@suse.de>

	* x86-64.h: Add vtable support.

2001-04-23  Bo Thorsen  <bo@suse.de>

	* elf64-x86-64.c: Add c++ vtable hack.
	Small whitespace and comment changes.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 0bdbf4c..8cd6eab 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,8 @@
+2001-04-23  Bo Thorsen  <bo@suse.de>
+
+       * elf64-x86-64.c: Add c++ vtable hack.
+       Small whitespace and comment changes.
+
 2001-04-19  Andreas Jaeger  <aj@suse.de>
 
        * elf64-x86-64.c (elf64_x86_64_plt0_entry): Fix instructions.

diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 6c7e98b..912f666 100644 (file)
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -37,29 +37,41 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 static reloc_howto_type x86_64_elf_howto_table[] =
 {
   HOWTO(R_X86_64_NONE, 0, 0, 0, false, 0, complain_overflow_dont,
-       bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0x00000000, 0x00000000, false),
+       bfd_elf_generic_reloc, "R_X86_64_NONE", false, 0x00000000, 0x00000000,
+       false),
   HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_bitfield,
-       bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE, false),
+       bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE,
+       false),
   HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff, true),
+       bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff,
+       true),
   HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff, false),
+       bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff,
+       false),
   HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff, true),
+       bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff,
+       true),
   HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield,
-       bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff, false),
+       bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff,
+       false),
   HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield,
-       bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, MINUS_ONE, MINUS_ONE, false),
+       bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", false, MINUS_ONE,
+       MINUS_ONE, false),
   HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, false, 0, complain_overflow_bitfield,
-       bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, MINUS_ONE, MINUS_ONE, false),
+       bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", false, MINUS_ONE,
+       MINUS_ONE, false),
   HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield,
-       bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE, MINUS_ONE, false),
+       bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE,
+       MINUS_ONE, false),
   HOWTO(R_X86_64_GOTPCREL, 0, 4, 32, true,0 , complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff, 0xffffffff, true),
+       bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff,
+       0xffffffff, true),
   HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned,
-       bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff, false),
+       bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff,
+       false),
   HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff, false),
+       bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff,
+       false),
   HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
        bfd_elf_generic_reloc, "R_X86_64_16", false, 0xffff, 0xffff, false),
   HOWTO(R_X86_64_PC16,0, 1, 16, true, 0, complain_overflow_bitfield,
@@ -67,7 +79,16 @@ static reloc_howto_type x86_64_elf_howto_table[] =
   HOWTO(R_X86_64_8, 0, 0, 8, false, 0, complain_overflow_signed,
        bfd_elf_generic_reloc, "R_X86_64_8", false, 0xff, 0xff, false),
   HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
-       bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true)
+       bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true),
+
+/* GNU extension to record C++ vtable hierarchy.  */
+  HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont,
+        NULL, "R_X86_64_GNU_VTINHERIT", false, 0, 0, false),
+
+/* GNU extension to record C++ vtable member usage.  */
+  HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, false, 0, complain_overflow_dont,
+        _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", false, 0, 0,
+        false)
 };
 
 /* Map BFD relocs to the x86_64 elf relocs.  */
@@ -95,6 +116,8 @@ static CONST struct elf_reloc_map x86_64_reloc_map[] =
   { BFD_RELOC_16_PCREL,                R_X86_64_PC16, },
   { BFD_RELOC_8,               R_X86_64_8, },
   { BFD_RELOC_8_PCREL,         R_X86_64_PC8, },
+  { BFD_RELOC_VTABLE_INHERIT,  R_X86_64_GNU_VTINHERIT, },
+  { BFD_RELOC_VTABLE_ENTRY,    R_X86_64_GNU_VTENTRY, },
 };
 
 static reloc_howto_type *elf64_x86_64_reloc_type_lookup
@@ -145,11 +168,20 @@ elf64_x86_64_info_to_howto (abfd, cache_ptr, dst)
      arelent *cache_ptr;
      Elf64_Internal_Rela *dst;
 {
-  unsigned r_type;
+  unsigned r_type, i;
 
   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];
+  if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT)
+    {
+      BFD_ASSERT (r_type <= (unsigned int) R_X86_64_PC8);
+      i = r_type;
+    }
+  else
+    {
+      BFD_ASSERT (r_type < (unsigned int) R_X86_64_max);
+      i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_PC8 - 1);
+    }
+  cache_ptr->howto = &x86_64_elf_howto_table[i];
   BFD_ASSERT (r_type == cache_ptr->howto->type);
 }
 \f
@@ -540,8 +572,7 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
                 that this function is only called if we are using an
                 elf64_x86_64 linker hash table, which means that h is
                 really a pointer to an elf64_x86_64_link_hash_entry.  */
-             if (h != NULL
-                 && ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32)
+             if (h != NULL && ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32)
                {
                  struct elf64_x86_64_link_hash_entry *eh;
                  struct elf64_x86_64_pcrel_relocs_copied *p;
@@ -568,6 +599,20 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
                }
            }
          break;
+
+         /* This relocation describes the C++ object vtable hierarchy.
+            Reconstruct it for later use during GC.  */
+       case R_X86_64_GNU_VTINHERIT:
+         if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+           return false;
+         break;
+
+         /* This relocation describes which C++ vtable entries are actually
+            used.  Record for later use during GC.  */
+       case R_X86_64_GNU_VTENTRY:
+         if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_offset))
+           return false;
+         break;
        }
     }
 
@@ -587,17 +632,25 @@ elf64_x86_64_gc_mark_hook (abfd, info, rel, h, sym)
 {
   if (h != NULL)
     {
-      switch (h->root.type)
+      switch (ELF64_R_TYPE (rel->r_info))
        {
-       case bfd_link_hash_defined:
-       case bfd_link_hash_defweak:
-         return h->root.u.def.section;
-
-       case bfd_link_hash_common:
-         return h->root.u.c.p->section;
+       case R_X86_64_GNU_VTINHERIT:
+       case R_X86_64_GNU_VTENTRY:
+         break;
 
        default:
-         break;
+         switch (h->root.type)
+           {
+           case bfd_link_hash_defined:
+           case bfd_link_hash_defweak:
+             return h->root.u.def.section;
+
+           case bfd_link_hash_common:
+             return h->root.u.c.p->section;
+
+           default:
+             break;
+           }
        }
     }
   else
@@ -1096,7 +1149,7 @@ elf64_x86_64_discard_copies (h, inf)
 
 static boolean
 elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
-                            contents, relocs, local_syms, local_sections)
+                              contents, relocs, local_syms, local_sections)
      bfd *output_bfd;
      struct bfd_link_info *info;
      bfd *input_bfd;
@@ -1143,6 +1196,9 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
       unsigned int indx;
 
       r_type = ELF64_R_TYPE (rela->r_info);
+      if (r_type == (int) R_X86_64_GNU_VTINHERIT
+         || r_type == (int) R_X86_64_GNU_VTENTRY)
+       continue;
 
       if ((indx = (unsigned) r_type) >= R_X86_64_max)
        {
@@ -1654,7 +1710,7 @@ elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym)
 
       /* Get the offset into the .got table of the entry that
         corresponds to this function.  Each .got entry is GOT_ENTRY_SIZE
-        bytes. The first three are reserved.  */
+        bytes. The first three are reserved for the dynamic linker.  */
       got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
 
       /* Fill in the entry in the procedure linkage table.  */

diff --git a/include/elf/ChangeLog b/include/elf/ChangeLog
index d305bda..815dd88 100644 (file)
--- a/include/elf/ChangeLog
+++ b/include/elf/ChangeLog
@@ -1,3 +1,7 @@
+2001-04-23  Bo Thorsen  <bo@suse.de>
+
+       * x86-64.h: Add vtable support.
+
 2001-03-23  Nick Clifton  <nickc@redhat.com>
 
        * mips.h: Remove extraneous whitespace.
@@ -40,14 +44,14 @@
 
         * mips.h (E_MIPS_ARCH_32): New constant.
         (E_MIPS_MACH_MIPS32, E_MIPS_MACH_MIPS32_4K): Replace the
-        former with the latter. 
+        former with the latter.
 
         * mips.h (E_MIPS_ARCH_5, E_MIPS_ARCH_64): New definitions.
 
         * mips.h (E_MIPS_MACH_SB1): New constant.
 
 2000-11-30  Jan Hubicka  <jh@suse.cz>
-       
+
         * common.h (EM_X86_64): New macro.
         * x86-64.h: New file.
 
@@ -107,7 +111,7 @@
 
 2000-09-13  Anders Norlander  <anorland@acc.umu.se>
 
-       * mips.h (E_MIPS_MACH_4K): New define.
+       * mips.h (E_MIPS_MACH_4K): New define.
 
 2000-09-05  Alan Modra  <alan@linuxcare.com.au>
 
@@ -170,7 +174,7 @@
 
 2000-07-10  Alan Modra  <alan@linuxcare.com.au>
 
-       * hppa.h: Add comments to all the relocs. 
+       * hppa.h: Add comments to all the relocs.
 
 2000-06-26  Marek Michalkiewicz  <marekm@linux.org.pl>
 

diff --git a/include/elf/x86-64.h b/include/elf/x86-64.h
index a4da0a3..74febc2 100644 (file)
--- a/include/elf/x86-64.h
+++ b/include/elf/x86-64.h
@@ -41,6 +41,8 @@ START_RELOC_NUMBERS (elf_x86_64_reloc_type)
      RELOC_NUMBER (R_X86_64_PC16,     13)     /* 16 bit sign extended pc relative*/
      RELOC_NUMBER (R_X86_64_8,                14)     /* Direct 8 bit sign extended */
      RELOC_NUMBER (R_X86_64_PC8,              15)     /* 8 bit sign extended pc relative*/
+     RELOC_NUMBER (R_X86_64_GNU_VTINHERIT, 250)       /* GNU C++ hack  */
+     RELOC_NUMBER (R_X86_64_GNU_VTENTRY, 251)         /* GNU C++ hack  */
 END_RELOC_NUMBERS (R_X86_64_max)
 
 #endif