Re: as 2.12, 2.13 on sparc -m64: error when linking: relocation trunc ated to fit: R_SPARC_DISP32 .gnu.linkonce.t.NewAlloc

[Alan Modra]

The sparc64-solaris problem is due to

- TEXT_START_ADDR=0x100000000
- R_SPARC_DISP32 used in eh_frame relocs
- relocations against removed linkonce section symbols resolving to zero,
  which means a displacement larger than can fit in a 32 bit field.

Fixed as follows.

bfd/ChangeLog
        * elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): Zero relocs
        for discarded FDEs.  Remove redundant assignment.
        * elflink.h (elf_bfd_discard_info): Save edited relocs.

Index: bfd/elf-eh-frame.c
===================================================================
RCS file: /cvs/src/src/bfd/elf-eh-frame.c,v
retrieving revision 1.14
diff -u -p -r1.14 elf-eh-frame.c
--- bfd/elf-eh-frame.c  23 Aug 2002 09:42:21 -0000      1.14
+++ bfd/elf-eh-frame.c  23 Sep 2002 10:21:07 -0000
@@ -632,11 +632,11 @@ _bfd_elf_discard_section_eh_frame (abfd,
            goto free_no_table;
          if ((*reloc_symbol_deleted_p) (buf - ehbuf, cookie))
            {
-             cookie->rel = rel;
              /* This is a FDE against discarded section, it should
                 be deleted.  */
              new_size -= hdr.length + 4;
              sec_info->entry[sec_info->count].removed = 1;
+             memset (rel, 0, sizeof (*rel));
            }
          else
            {
Index: bfd/elflink.h
===================================================================
RCS file: /cvs/src/src/bfd/elflink.h,v
retrieving revision 1.186
diff -u -p -r1.186 elflink.h
--- bfd/elflink.h       19 Sep 2002 16:34:14 -0000      1.186
+++ bfd/elflink.h       23 Sep 2002 10:21:15 -0000
@@ -8482,7 +8482,12 @@ elf_bfd_discard_info (output_bfd, info)
          if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, ehdr,
                                                 elf_reloc_symbol_deleted_p,
                                                 &cookie))
-           ret = true;
+           {
+             /* Relocs have been edited.  Ensure edited version is
+                used later in relocate_section.  */
+             elf_section_data (eh)->relocs = cookie.rels;
+             ret = true;
+           }
          if (cookie.rels && elf_section_data (eh)->relocs != cookie.rels)
            free (cookie.rels);
        }

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre