* elf32-s390.c (s390_elf_ldisp_reloc): New prototype.

        (s390_tls_reloc): New function.
        (elf_howto_table): Add long displacement relocations R_390_20,
        R_390_GOT20, R_390_GOTPLT20 and R_390_TLS_GOTIE20.
        (elf_s390_reloc_type_lookup): Likewise.
        (elf_s390_check_relocs): Likewise.
        (elf_s390_gc_sweep_hook): Likewise.
        (elf_s390_relocate_section): Likewise.
        * elf64-s390.c: Same changes as for elf32-s390.c.
        * reloc.c: Add long displacement relocations BFD_RELOC_390_20,
        BFD_RELOC_390_GOT20, BFD_RELOC_390_GOTPLT20 and
        BFD_RELOC_390_TLS_GOTIE20.
        * bfd-in2.h: Regenerate.
        * libbfd.h: Likewise.

1 files changed, 101 insertions, 3 deletions

diff --git a/bfd/elf32-s390.c b/bfd/elf32-s390.c
index 50d430dba99..55690bd06ce 100644
--- a/bfd/elf32-s390.c
+++ b/bfd/elf32-s390.c
@@ -88,6 +88,8 @@ static bfd_vma tpoff
   PARAMS ((struct bfd_link_info *, bfd_vma));
 static void invalid_tls_insn
   PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
+static bfd_reloc_status_type s390_elf_ldisp_reloc
+  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
 
 #include "elf/s390.h"
 
@@ -208,6 +210,14 @@ static reloc_howto_type elf_howto_table[] =
 	bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
   HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
 	bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
+  HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
+	s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
+  HOWTO(R_390_GOT20,	 0, 2, 20, FALSE, 8, complain_overflow_dont,
+	s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
+  HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
+	s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
+  HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
+	s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
 };
 
 /* GNU extension to record C++ vtable hierarchy.  */
@@ -313,6 +323,14 @@ elf_s390_reloc_type_lookup (abfd, code)
       return &elf_howto_table[(int) R_390_TLS_DTPOFF];
     case BFD_RELOC_390_TLS_TPOFF:
       return &elf_howto_table[(int) R_390_TLS_TPOFF];
+    case BFD_RELOC_390_20:
+      return &elf_howto_table[(int) R_390_20];
+    case BFD_RELOC_390_GOT20:
+      return &elf_howto_table[(int) R_390_GOT20];
+    case BFD_RELOC_390_GOTPLT20:
+      return &elf_howto_table[(int) R_390_GOTPLT20];
+    case BFD_RELOC_390_TLS_GOTIE20:
+      return &elf_howto_table[(int) R_390_TLS_GOTIE20];
     case BFD_RELOC_VTABLE_INHERIT:
       return &elf32_s390_vtinherit_howto;
     case BFD_RELOC_VTABLE_ENTRY:
@@ -365,6 +383,59 @@ s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
   return bfd_reloc_ok;
 }
 
+/* Handle the large displacement relocs.  */
+static bfd_reloc_status_type
+s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
+                      output_bfd, error_message)
+     bfd *abfd ATTRIBUTE_UNUSED;
+     arelent *reloc_entry;
+     asymbol *symbol;
+     PTR data ATTRIBUTE_UNUSED;
+     asection *input_section;
+     bfd *output_bfd;
+     char **error_message ATTRIBUTE_UNUSED;
+{
+  reloc_howto_type *howto = reloc_entry->howto;
+  bfd_vma relocation;
+  bfd_vma insn;
+  
+  if (output_bfd != (bfd *) NULL
+      && (symbol->flags & BSF_SECTION_SYM) == 0
+      && (! howto->partial_inplace
+	  || reloc_entry->addend == 0))
+    {
+      reloc_entry->address += input_section->output_offset;
+      return bfd_reloc_ok;
+    }
+  
+  if (output_bfd != NULL)
+    return bfd_reloc_continue;
+  
+  if (reloc_entry->address > input_section->_cooked_size)
+    return bfd_reloc_outofrange;
+  
+  relocation = (symbol->value
+		+ symbol->section->output_section->vma
+		+ symbol->section->output_offset);
+  relocation += reloc_entry->addend;
+  if (howto->pc_relative)
+    {
+      relocation -= (input_section->output_section->vma
+		     + input_section->output_offset);
+      relocation -= reloc_entry->address;
+    }
+  
+  insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
+  insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
+  bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
+  
+  if ((bfd_signed_vma) relocation < - 0x80000
+      || (bfd_signed_vma) relocation > 0x7ffff)
+    return bfd_reloc_overflow;
+  else
+    return bfd_reloc_ok;
+}
+
 static bfd_boolean
 elf_s390_is_local_label_name (abfd, name)
      bfd *abfd;
@@ -936,14 +1007,17 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 	{
 	case R_390_GOT12:
 	case R_390_GOT16:
+	case R_390_GOT20:
 	case R_390_GOT32:
 	case R_390_GOTENT:
 	case R_390_GOTPLT12:
 	case R_390_GOTPLT16:
+	case R_390_GOTPLT20:
 	case R_390_GOTPLT32:
 	case R_390_GOTPLTENT:
 	case R_390_TLS_GD32:
 	case R_390_TLS_GOTIE12:
+	case R_390_TLS_GOTIE20:
 	case R_390_TLS_GOTIE32:
 	case R_390_TLS_IEENT:
 	case R_390_TLS_IE32:
@@ -1009,6 +1083,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 
 	case R_390_GOTPLT12:
 	case R_390_GOTPLT16:
+	case R_390_GOTPLT20:
 	case R_390_GOTPLT32:
 	case R_390_GOTPLTENT:
 	  /* This symbol requires either a procedure linkage table entry
@@ -1035,6 +1110,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 
 	case R_390_TLS_IE32:
 	case R_390_TLS_GOTIE12:
+	case R_390_TLS_GOTIE20:
 	case R_390_TLS_GOTIE32:
 	case R_390_TLS_IEENT:
 	  if (info->shared)
@@ -1043,6 +1119,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 
 	case R_390_GOT12:
 	case R_390_GOT16:
+	case R_390_GOT20:
 	case R_390_GOT32:
 	case R_390_GOTENT:
 	case R_390_TLS_GD32:
@@ -1052,6 +1129,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 	    default:
 	    case R_390_GOT12:
 	    case R_390_GOT16:
+	    case R_390_GOT20:
 	    case R_390_GOT32:
 	    case R_390_GOTENT:
 	      tls_type = GOT_NORMAL;
@@ -1064,6 +1142,7 @@ elf_s390_check_relocs (abfd, info, sec, relocs)
 	      tls_type = GOT_TLS_IE;
 	      break;
 	    case R_390_TLS_GOTIE12:
+	    case R_390_TLS_GOTIE20:
 	    case R_390_TLS_IEENT:
 	      tls_type = GOT_TLS_IE_NLT;
 	      break;
@@ -1390,10 +1469,12 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
 	case R_390_TLS_GD32:
 	case R_390_TLS_IE32:
 	case R_390_TLS_GOTIE12:
+	case R_390_TLS_GOTIE20:
 	case R_390_TLS_GOTIE32:
 	case R_390_TLS_IEENT:
 	case R_390_GOT12:
 	case R_390_GOT16:
+	case R_390_GOT20:
 	case R_390_GOT32:
 	case R_390_GOTOFF16:
 	case R_390_GOTOFF32:
@@ -1415,6 +1496,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
 	case R_390_8:
 	case R_390_12:
 	case R_390_16:
+	case R_390_20:
 	case R_390_32:
 	case R_390_PC16:
 	case R_390_PC16DBL:
@@ -1438,6 +1520,7 @@ elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
 
 	case R_390_GOTPLT12:
 	case R_390_GOTPLT16:
+	case R_390_GOTPLT20:
 	case R_390_GOTPLT32:
 	case R_390_GOTPLTENT:
 	  if (h != NULL)
@@ -2293,6 +2376,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
 	{
 	case R_390_GOTPLT12:
 	case R_390_GOTPLT16:
+	case R_390_GOTPLT20:
 	case R_390_GOTPLT32:
 	case R_390_GOTPLTENT:
 	  /* There are three cases for a GOTPLT relocation. 1) The
@@ -2326,6 +2410,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
 
 	case R_390_GOT12:
 	case R_390_GOT16:
+	case R_390_GOT20:
 	case R_390_GOT32:
 	case R_390_GOTENT:
 	  /* Relocation is to the entry for this symbol in the global
@@ -2732,6 +2817,7 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
 	  break;
 
 	case R_390_TLS_GOTIE12:
+	case R_390_TLS_GOTIE20:
 	case R_390_TLS_IEENT:
 	  if (h == NULL)
 	    {
@@ -2939,9 +3025,21 @@ elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
 	   (long) rel->r_offset,
 	   h->root.root.string);
 
-      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
-				    contents, rel->r_offset,
-				    relocation, rel->r_addend);
+      if (r_type == R_390_20
+	  || r_type == R_390_GOT20
+	  || r_type == R_390_GOTPLT20
+	  || r_type == R_390_TLS_GOTIE20)
+	{
+	  relocation += rel->r_addend;
+	  relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
+	  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+					contents, rel->r_offset,
+					relocation, 0);
+	}
+      else
+	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+				      contents, rel->r_offset,
+				      relocation, rel->r_addend);
 
       if (r != bfd_reloc_ok)
 	{