add i386-elf relocs (from Meissner)

diff --git a/bfd/reloc.c b/bfd/reloc.c
index c2df4b722b0dac4cef624b73c5bd3e5caf6fa0fe..acce99e82591e17e51a0cd5dd9600cec1bb2dc29 100644 (file)
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -579,7 +579,9 @@ DEFUN(bfd_perform_relocation,(abfd,
      might have overflowed before we get here.  For a correct check we
      need to compute the value in a size larger than bitsize, but we
      can't reasonably do that for a reloc the same size as a host
-     machine word.  */
+     machine word.
+     FIXME: We should also do overflow checking on the result after
+     adding in the value contained in the object file.  */
   if (howto->complain_on_overflow != complain_overflow_dont)
     {
       bfd_vma check;
@@ -631,7 +633,22 @@ DEFUN(bfd_perform_relocation,(abfd,
 
            if (((bfd_vma) check &~ reloc_bits) != 0
                && ((bfd_vma) check &~ reloc_bits) != (-1 &~ reloc_bits))
-             flag = bfd_reloc_overflow;
+             {
+               /* The above right shift is incorrect for a signed
+                  value.  See if turning on the upper bits fixes the
+                  overflow.  */
+               if (howto->rightshift > howto->bitpos
+                   && (bfd_signed_vma) relocation < 0)
+                 {
+                   check |= ((bfd_vma) -1
+                             &~ ((bfd_vma) -1
+                                 >> (howto->rightshift - howto->bitpos)));
+                   if (((bfd_vma) check &~ reloc_bits) != (-1 &~ reloc_bits))
+                     flag = bfd_reloc_overflow;
+                 }
+               else
+                 flag = bfd_reloc_overflow;
+             }
          }
          break;
        default:
@@ -962,6 +979,16 @@ CODE_FRAGMENT
 .  BFD_RELOC_HPPA_UNWIND_ENTRY,
 .  BFD_RELOC_HPPA_UNWIND_ENTRIES,
 .
+.  {* i386/elf relocations *}
+.  BFD_RELOC_386_GOT32,
+.  BFD_RELOC_386_PLT32,
+.  BFD_RELOC_386_COPY,
+.  BFD_RELOC_386_GLOB_DAT,
+.  BFD_RELOC_386_JUMP_SLOT,
+.  BFD_RELOC_386_RELATIVE,
+.  BFD_RELOC_386_GOTOFF,
+.  BFD_RELOC_386_GOTPC,
+.
 .  {* this must be the highest numeric value *}
 .  BFD_RELOC_UNUSED
 . } bfd_reloc_code_real_type;