Add IBM 370 support.

1 files changed, 1745 insertions, 0 deletions

diff --git a/bfd/elf32-i370.c b/bfd/elf32-i370.c
new file mode 100644
index 0000000000..6dc993d26e
--- /dev/null
+++ b/bfd/elf32-i370.c
@@ -0,0 +1,1745 @@
+/* i370-specific support for 32-bit ELF
+   Copyright 1994, 95, 96, 97, 98, 2000 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor, Cygnus Support.
+   Hacked by Linas Vepstas for i370 linas@linas.org
+
+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.  */
+
+
+
+/* This file is based on a preliminary PowerPC ELF ABI.
+   But its been hacked on for the IBM 360/370 architectures.
+   Basically, the 31bit relocation works, and just about everything
+   else is a wild card.  In particular, don't expect shared libs or
+   dynamic loading to work ...  its never been tested ...
+*/
+
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "bfdlink.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/i370.h"
+
+#define USE_RELA		/* we want RELA relocations, not REL */
+
+/* i370 relocations */
+/* Note that there is really just one relocation that we currently
+ * support (and only one that we seem to need, at the moment), and
+ * that is the 31-bit address relocation.  Note that the 370/390
+ * only supports a 31-bit (2GB) address space.
+ */
+enum i370_reloc_type
+{
+  R_I370_NONE		=   0,
+  R_I370_ADDR31		=   1,
+  R_I370_ADDR32		=   2,
+  R_I370_ADDR16		=   3,
+  R_I370_REL31		=   4,
+  R_I370_REL32		=   5,
+  R_I370_ADDR12		=   6,
+  R_I370_REL12		=   7,
+  R_I370_ADDR8		=   8,
+  R_I370_REL8		=   9,
+  R_I370_COPY		=  10,
+  R_I370_RELATIVE	=  11,
+
+  R_I370_max
+};
+
+
+static reloc_howto_type *i370_elf_howto_table[ (int)R_I370_max ];
+
+static reloc_howto_type i370_elf_howto_raw[] =
+{
+  /* This reloc does nothing.  */
+  HOWTO (R_I370_NONE,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_NONE",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A standard 31 bit relocation.  */
+  HOWTO (R_I370_ADDR31,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 31,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_ADDR31",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0x7fffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A standard 32 bit relocation.  */
+  HOWTO (R_I370_ADDR32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_ADDR32",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A standard 16 bit relocation.  */
+  HOWTO (R_I370_ADDR16,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_ADDR16",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* 31-bit PC relative */
+  HOWTO (R_I370_REL31,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 31,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_REL31",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0x7fffffff,		/* dst_mask */
+	 true),			/* pcrel_offset */
+
+  /* 32-bit PC relative */
+  HOWTO (R_I370_REL32,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_REL32",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 true),			/* pcrel_offset */
+
+  /* A standard 12 bit relocation.  */
+  HOWTO (R_I370_ADDR12,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 12,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_ADDR12",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xfff,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* 12-bit PC relative */
+  HOWTO (R_I370_REL12,		/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 12,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_REL12",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xfff,			/* dst_mask */
+	 true),			/* pcrel_offset */
+
+  /* A standard 8 bit relocation.  */
+  HOWTO (R_I370_ADDR8,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_ADDR8",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xff,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* 8-bit PC relative */
+  HOWTO (R_I370_REL8,		/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	/* special_function */
+	 "R_I370_REL8",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xff,			/* dst_mask */
+	 true),			/* pcrel_offset */
+
+  /* This is used only by the dynamic linker.  The symbol should exist
+     both in the object being run and in some shared library.  The
+     dynamic linker copies the data addressed by the symbol from the
+     shared library into the object, because the object being
+     run has to have the data at some particular address.  */
+  HOWTO (R_I370_COPY,		/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	 /* special_function */
+	 "R_I370_COPY",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Used only by the dynamic linker.  When the object is run, this
+     longword is set to the load address of the object, plus the
+     addend.  */
+  HOWTO (R_I370_RELATIVE,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 bfd_elf_generic_reloc,	 /* special_function */
+	 "R_I370_RELATIVE",	/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+};
+
+
+static void i370_elf_howto_init PARAMS ((void));
+static void i370_elf_info_to_howto PARAMS ((bfd *abfd, arelent *cache_ptr,
+					    Elf32_Internal_Rela *dst));
+static boolean i370_elf_set_private_flags PARAMS ((bfd *, flagword));
+
+
+/* Initialize the i370_elf_howto_table, so that linear accesses can be done.  */
+
+static void
+i370_elf_howto_init ()
+{
+  unsigned int i, type;
+
+  for (i = 0; i < sizeof (i370_elf_howto_raw) / sizeof (i370_elf_howto_raw[0]); i++)
+    {
+      type = i370_elf_howto_raw[i].type;
+      BFD_ASSERT (type < sizeof(i370_elf_howto_table) / sizeof(i370_elf_howto_table[0]));
+      i370_elf_howto_table[type] = &i370_elf_howto_raw[i];
+    }
+}
+
+
+static reloc_howto_type *
+i370_elf_reloc_type_lookup (abfd, code)
+     bfd *abfd;
+     bfd_reloc_code_real_type code;
+{
+  enum i370_reloc_type i370_reloc = R_I370_NONE;
+
+  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table if needed */
+    i370_elf_howto_init ();
+
+  switch ((int)code)
+    {
+    default:
+      return (reloc_howto_type *)NULL;
+
+    case BFD_RELOC_NONE:	i370_reloc = R_I370_NONE;	break;
+    case BFD_RELOC_32:		i370_reloc = R_I370_ADDR31;	break;
+    case BFD_RELOC_16:		i370_reloc = R_I370_ADDR16;	break;
+    case BFD_RELOC_32_PCREL:	i370_reloc = R_I370_REL31;	break;
+    case BFD_RELOC_CTOR:	i370_reloc = R_I370_ADDR31;	break;
+    case BFD_RELOC_I370_D12:	i370_reloc = R_I370_ADDR12;	break;
+    }
+
+  return i370_elf_howto_table[ (int)i370_reloc ];
+};
+
+static boolean i370_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
+static boolean i370_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+
+static boolean i370_elf_relocate_section PARAMS ((bfd *,
+						  struct bfd_link_info *info,
+						  bfd *,
+						  asection *,
+						  bfd_byte *,
+						  Elf_Internal_Rela *relocs,
+						  Elf_Internal_Sym *local_syms,
+						  asection **));
+
+static boolean i370_elf_create_dynamic_sections PARAMS ((bfd *,
+							 struct bfd_link_info *));
+
+static boolean i370_elf_section_from_shdr PARAMS ((bfd *,
+						   Elf32_Internal_Shdr *,
+						   char *));
+static boolean i370_elf_fake_sections PARAMS ((bfd *,
+					       Elf32_Internal_Shdr *,
+					       asection *));
+
+static elf_linker_section_t *i370_elf_create_linker_section
+  PARAMS ((bfd *abfd,
+	   struct bfd_link_info *info,
+	   enum elf_linker_section_enum));
+
+static boolean i370_elf_check_relocs PARAMS ((bfd *,
+					     struct bfd_link_info *,
+					     asection *,
+					     const Elf_Internal_Rela *));
+
+static boolean i370_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
+						      struct elf_link_hash_entry *));
+
+static boolean i370_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR));
+
+static boolean i370_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
+
+static boolean i370_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));
+
+/* The name of the dynamic interpreter.  This is put in the .interp
+    section.  */
+
+#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so"
+
+
+/* Set the howto pointer for an i370 ELF reloc.  */
+
+static void
+i370_elf_info_to_howto (abfd, cache_ptr, dst)
+     bfd *abfd;
+     arelent *cache_ptr;
+     Elf32_Internal_Rela *dst;
+{
+  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table */
+    i370_elf_howto_init ();
+
+  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_I370_max);
+  cache_ptr->howto = i370_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
+
+/* hack alert --  the following several routines look generic to me ...
+ * why are we bothering with them ???
+ */
+/* Function to set whether a module needs the -mrelocatable bit set. */
+static boolean
+i370_elf_set_private_flags (abfd, flags)
+     bfd *abfd;
+     flagword flags;
+{
+  BFD_ASSERT (!elf_flags_init (abfd)
+	      || elf_elfheader (abfd)->e_flags == flags);
+
+  elf_elfheader (abfd)->e_flags = flags;
+  elf_flags_init (abfd) = true;
+  return true;
+}
+
+/* Copy backend specific data from one object module to another */
+static boolean
+i370_elf_copy_private_bfd_data (ibfd, obfd)
+     bfd *ibfd;
+     bfd *obfd;
+{
+  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+    return true;
+
+  BFD_ASSERT (!elf_flags_init (obfd)
+	      || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
+
+  elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
+  elf_flags_init (obfd) = true;
+  return true;
+}
+
+/* Merge backend specific data from an object file to the output
+   object file when linking */
+static boolean
+i370_elf_merge_private_bfd_data (ibfd, obfd)
+     bfd *ibfd;
+     bfd *obfd;
+{
+  flagword old_flags;
+  flagword new_flags;
+
+  if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
+      || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
+    return true;
+
+  new_flags = elf_elfheader (ibfd)->e_flags;
+  old_flags = elf_elfheader (obfd)->e_flags;
+  if (!elf_flags_init (obfd))	/* First call, no flags set */
+    {
+      elf_flags_init (obfd) = true;
+      elf_elfheader (obfd)->e_flags = new_flags;
+    }
+
+  else if (new_flags == old_flags)	/* Compatible flags are ok */
+    ;
+
+  else					/* Incompatible flags */
+    {
+      (*_bfd_error_handler)
+	("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)",
+	 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
+
+      bfd_set_error (bfd_error_bad_value);
+      return false;
+    }
+
+  return true;
+}
+
+
+/* Handle an i370 specific section when reading an object file.  This
+   is called when elfcode.h finds a section with an unknown type.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_section_from_shdr (abfd, hdr, name)
+     bfd *abfd;
+     Elf32_Internal_Shdr *hdr;
+     char *name;
+{
+  asection *newsect;
+  flagword flags;
+
+  if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
+    return false;
+
+  newsect = hdr->bfd_section;
+  flags = bfd_get_section_flags (abfd, newsect);
+  if (hdr->sh_flags & SHF_EXCLUDE)
+    flags |= SEC_EXCLUDE;
+
+  if (hdr->sh_type == SHT_ORDERED)
+    flags |= SEC_SORT_ENTRIES;
+
+  bfd_set_section_flags (abfd, newsect, flags);
+  return true;
+}
+
+
+
+/* Set up any other section flags and such that may be necessary.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+
+static boolean
+i370_elf_fake_sections (abfd, shdr, asect)
+     bfd *abfd;
+     Elf32_Internal_Shdr *shdr;
+     asection *asect;
+{
+  if ((asect->flags & SEC_EXCLUDE) != 0)
+    shdr->sh_flags |= SHF_EXCLUDE;
+
+  if ((asect->flags & SEC_SORT_ENTRIES) != 0)
+    shdr->sh_type = SHT_ORDERED;
+
+  return true;
+}
+
+
+/* Create a special linker section */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static elf_linker_section_t *
+i370_elf_create_linker_section (abfd, info, which)
+     bfd *abfd;
+     struct bfd_link_info *info;
+     enum elf_linker_section_enum which;
+{
+  bfd *dynobj = elf_hash_table (info)->dynobj;
+  elf_linker_section_t *lsect;
+
+  /* Record the first bfd section that needs the special section */
+  if (!dynobj)
+    dynobj = elf_hash_table (info)->dynobj = abfd;
+
+  /* If this is the first time, create the section */
+  lsect = elf_linker_section (dynobj, which);
+  if (!lsect)
+    {
+      elf_linker_section_t defaults;
+      static elf_linker_section_t zero_section;
+
+      defaults = zero_section;
+      defaults.which = which;
+      defaults.hole_written_p = false;
+      defaults.alignment = 2;
+
+      /* Both of these sections are (technically) created by the user
+	 putting data in them, so they shouldn't be marked
+	 SEC_LINKER_CREATED.
+
+	 The linker creates them so it has somewhere to attach their
+	 respective symbols. In fact, if they were empty it would
+	 be OK to leave the symbol set to 0 (or any random number), because
+	 the appropriate register should never be used.  */
+      defaults.flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+			| SEC_IN_MEMORY);
+
+      switch (which)
+	{
+	default:
+	  (*_bfd_error_handler) ("%s: Unknown special linker type %d",
+				 bfd_get_filename (abfd),
+				 (int)which);
+
+	  bfd_set_error (bfd_error_bad_value);
+	  return (elf_linker_section_t *)0;
+
+	case LINKER_SECTION_SDATA:	/* .sdata/.sbss section */
+	  defaults.name		  = ".sdata";
+	  defaults.rel_name	  = ".rela.sdata";
+	  defaults.bss_name	  = ".sbss";
+	  defaults.sym_name	  = "_SDA_BASE_";
+	  defaults.sym_offset	  = 32768;
+	  break;
+
+	case LINKER_SECTION_SDATA2:	/* .sdata2/.sbss2 section */
+	  defaults.name		  = ".sdata2";
+	  defaults.rel_name	  = ".rela.sdata2";
+	  defaults.bss_name	  = ".sbss2";
+	  defaults.sym_name	  = "_SDA2_BASE_";
+	  defaults.sym_offset	  = 32768;
+	  defaults.flags	 |= SEC_READONLY;
+	  break;
+	}
+
+      lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
+    }
+
+  return lsect;
+}
+
+
+/* We have to create .dynsbss and .rela.sbss here so that they get mapped
+   to output sections (just like _bfd_elf_create_dynamic_sections has
+   to create .dynbss and .rela.bss).  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_create_dynamic_sections (abfd, info)
+     bfd *abfd;
+     struct bfd_link_info *info;
+{
+  register asection *s;
+  flagword flags;
+
+  if (!_bfd_elf_create_dynamic_sections(abfd, info))
+    return false;
+
+  flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+	   | SEC_LINKER_CREATED);
+
+  s = bfd_make_section (abfd, ".dynsbss");
+  if (s == NULL
+      || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
+    return false;
+
+  if (! info->shared)
+    {
+      s = bfd_make_section (abfd, ".rela.sbss");
+      if (s == NULL
+	  || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+	  || ! bfd_set_section_alignment (abfd, s, 2))
+	return false;
+    }
+
+   /* xxx beats me, seem to need a rela.text ... */
+   s = bfd_make_section (abfd, ".rela.text");
+   if (s == NULL
+      || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
+      || ! bfd_set_section_alignment (abfd, s, 2))
+    return false;
+  return true;
+}
+
+/* Adjust a symbol defined by a dynamic object and referenced by a
+   regular object.  The current definition is in some section of the
+   dynamic object, but we're not including those sections.  We have to
+   change the definition to something the rest of the link can
+   understand.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_adjust_dynamic_symbol (info, h)
+     struct bfd_link_info *info;
+     struct elf_link_hash_entry *h;
+{
+  bfd *dynobj = elf_hash_table (info)->dynobj;
+  asection *s;
+  unsigned int power_of_two;
+  bfd_vma plt_offset;
+
+#ifdef DEBUG
+  fprintf (stderr, "i370_elf_adjust_dynamic_symbol called for %s\n",
+	   h->root.root.string);
+#endif
+
+  /* Make sure we know what is going on here.  */
+  BFD_ASSERT (dynobj != NULL
+	      && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
+		  || h->weakdef != NULL
+		  || ((h->elf_link_hash_flags
+		       & ELF_LINK_HASH_DEF_DYNAMIC) != 0
+		      && (h->elf_link_hash_flags
+			  & ELF_LINK_HASH_REF_REGULAR) != 0
+		      && (h->elf_link_hash_flags
+			  & ELF_LINK_HASH_DEF_REGULAR) == 0)));
+
+
+  s = bfd_get_section_by_name (dynobj, ".rela.text");
+  BFD_ASSERT (s != NULL);
+  s->_raw_size += sizeof (Elf32_External_Rela);
+
+  /* If this is a weak symbol, and there is a real definition, the
+     processor independent code will have arranged for us to see the
+     real definition first, and we can just use the same value.  */
+  if (h->weakdef != NULL)
+    {
+      BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
+		  || h->weakdef->root.type == bfd_link_hash_defweak);
+      h->root.u.def.section = h->weakdef->root.u.def.section;
+      h->root.u.def.value = h->weakdef->root.u.def.value;
+      return true;
+    }
+
+  /* This is a reference to a symbol defined by a dynamic object which
+     is not a function.  */
+
+  /* If we are creating a shared library, we must presume that the
+     only references to the symbol are via the global offset table.
+     For such cases we need not do anything here; the relocations will
+     be handled correctly by relocate_section.  */
+  if (info->shared)
+    return true;
+
+  /* We must allocate the symbol in our .dynbss section, which will
+     become part of the .bss section of the executable.  There will be
+     an entry for this symbol in the .dynsym section.  The dynamic
+     object will contain position independent code, so all references
+     from the dynamic object to this symbol will go through the global
+     offset table.  The dynamic linker will use the .dynsym entry to
+     determine the address it must put in the global offset table, so
+     both the dynamic object and the regular object will refer to the
+     same memory location for the variable.
+
+     Of course, if the symbol is sufficiently small, we must instead
+     allocate it in .sbss.  FIXME: It would be better to do this if and
+     only if there were actually SDAREL relocs for that symbol.  */
+
+  if (h->size <= elf_gp_size (dynobj))
+    s = bfd_get_section_by_name (dynobj, ".dynsbss");
+  else
+    s = bfd_get_section_by_name (dynobj, ".dynbss");
+  BFD_ASSERT (s != NULL);
+
+  /* We must generate a R_I370_COPY reloc to tell the dynamic linker to
+     copy the initial value out of the dynamic object and into the
+     runtime process image.  We need to remember the offset into the
+     .rela.bss section we are going to use.  */
+  if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+    {
+      asection *srel;
+
+      if (h->size <= elf_gp_size (dynobj))
+	srel = bfd_get_section_by_name (dynobj, ".rela.sbss");
+      else
+	srel = bfd_get_section_by_name (dynobj, ".rela.bss");
+      BFD_ASSERT (srel != NULL);
+      srel->_raw_size += sizeof (Elf32_External_Rela);
+      h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
+    }
+
+  /* We need to figure out the alignment required for this symbol.  I
+     have no idea how ELF linkers handle this.  */
+  power_of_two = bfd_log2 (h->size);
+  if (power_of_two > 4)
+    power_of_two = 4;
+
+  /* Apply the required alignment.  */
+  s->_raw_size = BFD_ALIGN (s->_raw_size,
+			    (bfd_size_type) (1 << power_of_two));
+  if (power_of_two > bfd_get_section_alignment (dynobj, s))
+    {
+      if (! bfd_set_section_alignment (dynobj, s, power_of_two))
+	return false;
+    }
+
+  /* Define the symbol as being at this point in the section.  */
+  h->root.u.def.section = s;
+  h->root.u.def.value = s->_raw_size;
+
+  /* Increment the section size to make room for the symbol.  */
+  s->_raw_size += h->size;
+
+  return true;
+}
+
+
+/* Increment the index of a dynamic symbol by a given amount.  Called
+   via elf_link_hash_traverse.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_adjust_dynindx (h, cparg)
+     struct elf_link_hash_entry *h;
+     PTR cparg;
+{
+  int *cp = (int *) cparg;
+
+#ifdef DEBUG
+  fprintf (stderr,
+	   "i370_elf_adjust_dynindx called, h->dynindx = %d, *cp = %d\n",
+	   h->dynindx, *cp);
+#endif
+
+  if (h->dynindx != -1)
+    h->dynindx += *cp;
+
+  return true;
+}
+
+
+/* Set the sizes of the dynamic sections.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_size_dynamic_sections (output_bfd, info)
+     bfd *output_bfd;
+     struct bfd_link_info *info;
+{
+  bfd *dynobj;
+  asection *s;
+  boolean plt;
+  boolean relocs;
+  boolean reltext;
+
+#ifdef DEBUG
+  fprintf (stderr, "i370_elf_size_dynamic_sections called\n");
+#endif
+
+  dynobj = elf_hash_table (info)->dynobj;
+  BFD_ASSERT (dynobj != NULL);
+
+  if (elf_hash_table (info)->dynamic_sections_created)
+    {
+      /* Set the contents of the .interp section to the interpreter.  */
+      if (! info->shared)
+	{
+	  s = bfd_get_section_by_name (dynobj, ".interp");
+	  BFD_ASSERT (s != NULL);
+	  s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
+	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+	}
+    }
+  else
+    {
+      /* We may have created entries in the .rela.got, .rela.sdata, and
+	 .rela.sdata2 sections.  However, if we are not creating the
+	 dynamic sections, we will not actually use these entries.  Reset
+	 the size of .rela.got, et al, which will cause it to get
+	 stripped from the output file below.  */
+      static char *rela_sections[] = { ".rela.got", ".rela.sdata",
+				       ".rela.sdata2", ".rela.sbss",
+				       (char *)0 };
+      char **p;
+
+      for (p = rela_sections; *p != (char *)0; p++)
+	{
+	  s = bfd_get_section_by_name (dynobj, *p);
+	  if (s != NULL)
+	    s->_raw_size = 0;
+	}
+    }
+
+  /* The check_relocs and adjust_dynamic_symbol entry points have
+     determined the sizes of the various dynamic sections.  Allocate
+     memory for them.  */
+  plt = false;
+  relocs = false;
+  reltext = false;
+  for (s = dynobj->sections; s != NULL; s = s->next)
+    {
+      const char *name;
+      boolean strip;
+
+      if ((s->flags & SEC_LINKER_CREATED) == 0)
+	continue;
+
+      /* It's OK to base decisions on the section name, because none
+	 of the dynobj section names depend upon the input files.  */
+      name = bfd_get_section_name (dynobj, s);
+      strip = false;
+
+      if (strcmp (name, ".plt") == 0)
+	{
+	  if (s->_raw_size == 0)
+	    {
+	      /* Strip this section if we don't need it; see the
+                 comment below.  */
+	      strip = true;
+	    }
+	  else
+	    {
+	      /* Remember whether there is a PLT.  */
+	      plt = true;
+	    }
+	}
+      else if (strncmp (name, ".rela", 5) == 0)
+	{
+	  if (s->_raw_size == 0)
+	    {
+	      /* If we don't need this section, strip it from the
+		 output file.  This is mostly to handle .rela.bss and
+		 .rela.plt.  We must create both sections in
+		 create_dynamic_sections, because they must be created
+		 before the linker maps input sections to output
+		 sections.  The linker does that before
+		 adjust_dynamic_symbol is called, and it is that
+		 function which decides whether anything needs to go
+		 into these sections.  */
+	      strip = true;
+	    }
+	  else
+	    {
+	      asection *target;
+	      const char *outname;
+
+	      /* Remember whether there are any relocation sections. */
+	      relocs = true;
+
+	      /* If this relocation section applies to a read only
+		 section, then we probably need a DT_TEXTREL entry.  */
+	      outname = bfd_get_section_name (output_bfd,
+					      s->output_section);
+	      target = bfd_get_section_by_name (output_bfd, outname + 5);
+	      if (target != NULL
+		  && (target->flags & SEC_READONLY) != 0
+		  && (target->flags & SEC_ALLOC) != 0)
+		reltext = true;
+
+	      /* We use the reloc_count field as a counter if we need
+		 to copy relocs into the output file.  */
+	      s->reloc_count = 0;
+	    }
+	}
+      else if (strcmp (name, ".got") != 0
+	       && strcmp (name, ".sdata") != 0
+	       && strcmp (name, ".sdata2") != 0)
+	{
+	  /* It's not one of our sections, so don't allocate space.  */
+	  continue;
+	}
+
+      if (strip)
+	{
+	  asection **spp;
+
+	  for (spp = &s->output_section->owner->sections;
+	       *spp != s->output_section;
+	       spp = &(*spp)->next)
+	    ;
+	  *spp = s->output_section->next;
+	  --s->output_section->owner->section_count;
+
+	  continue;
+	}
+      /* Allocate memory for the section contents.  */
+      s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
+      if (s->contents == NULL && s->_raw_size != 0)
+	return false;
+    }
+
+  if (elf_hash_table (info)->dynamic_sections_created)
+    {
+      /* Add some entries to the .dynamic section.  We fill in the
+	 values later, in i370_elf_finish_dynamic_sections, but we
+	 must add the entries now so that we get the correct size for
+	 the .dynamic section.  The DT_DEBUG entry is filled in by the
+	 dynamic linker and used by the debugger.  */
+      if (! info->shared)
+	{
+	  if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
+	    return false;
+	}
+
+      if (plt)
+	{
+	  if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
+	      || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
+	      || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
+	      || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
+	    return false;
+	}
+
+      if (relocs)
+	{
+	  if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
+	      || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
+	      || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
+						sizeof (Elf32_External_Rela)))
+	    return false;
+	}
+
+      if (reltext)
+	{
+	  if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
+	    return false;
+	}
+    }
+
+  /* If we are generating a shared library, we generate a section
+     symbol for each output section.  These are local symbols, which
+     means that they must come first in the dynamic symbol table.
+     That means we must increment the dynamic symbol index of every
+     other dynamic symbol.
+
+     FIXME: We assume that there will never be relocations to
+     locations in linker-created sections that do not have
+     externally-visible names. Instead, we should work out precisely
+     which sections relocations are targetted at.  */
+  if (info->shared)
+    {
+      int c;
+
+      for (c = 0, s = output_bfd->sections; s != NULL; s = s->next)
+	{
+	  if ((s->flags & SEC_LINKER_CREATED) != 0
+	      || (s->flags & SEC_ALLOC) == 0)
+	    {
+	      elf_section_data (s)->dynindx = -1;
+	      continue;
+	    }
+
+	  /* These symbols will have no names, so we don't need to
+	     fiddle with dynstr_index.  */
+
+	  elf_section_data (s)->dynindx = c + 1;
+
+	  c++;
+	}
+
+      elf_link_hash_traverse (elf_hash_table (info),
+			      i370_elf_adjust_dynindx,
+			      (PTR) &c);
+      elf_hash_table (info)->dynsymcount += c;
+    }
+
+  return true;
+}
+
+
+/* Look through the relocs for a section during the first phase, and
+   allocate space in the global offset table or procedure linkage
+   table.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_check_relocs (abfd, info, sec, relocs)
+     bfd *abfd;
+     struct bfd_link_info *info;
+     asection *sec;
+     const Elf_Internal_Rela *relocs;
+{
+  bfd *dynobj;
+  Elf_Internal_Shdr *symtab_hdr;
+  struct elf_link_hash_entry **sym_hashes;
+  const Elf_Internal_Rela *rel;
+  const Elf_Internal_Rela *rel_end;
+  bfd_vma *local_got_offsets;
+  elf_linker_section_t *sdata;
+  elf_linker_section_t *sdata2;
+  asection *sreloc;
+  asection *sgot;
+  asection *srelgot = NULL;
+
+  if (info->relocateable)
+    return true;
+
+#ifdef DEBUG
+  fprintf (stderr, "i370_elf_check_relocs called for section %s in %s\n",
+	   bfd_get_section_name (abfd, sec),
+	   bfd_get_filename (abfd));
+#endif
+
+  dynobj = elf_hash_table (info)->dynobj;
+  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+  sym_hashes = elf_sym_hashes (abfd);
+  local_got_offsets = elf_local_got_offsets (abfd);
+
+  sreloc = NULL;
+
+  rel_end = relocs + sec->reloc_count;
+  for (rel = relocs; rel < rel_end; rel++)
+    {
+      unsigned long r_symndx;
+      struct elf_link_hash_entry *h;
+
+      r_symndx = ELF32_R_SYM (rel->r_info);
+      if (r_symndx < symtab_hdr->sh_info)
+	h = NULL;
+      else
+	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+
+      if (info->shared)
+	{
+#ifdef DEBUG
+	  fprintf (stderr,
+		   "i370_elf_check_relocs needs to create relocation for %s\n",
+		   (h && h->root.root.string)
+		   ? h->root.root.string : "<unknown>");
+#endif
+	  if (sreloc == NULL)
+	    {
+	      const char *name;
+
+	      name = (bfd_elf_string_from_elf_section
+		      (abfd,
+		       elf_elfheader (abfd)->e_shstrndx,
+		       elf_section_data (sec)->rel_hdr.sh_name));
+	      if (name == NULL)
+		return false;
+
+	      BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+			  && strcmp (bfd_get_section_name (abfd, sec), name + 5) == 0);
+
+	      sreloc = bfd_get_section_by_name (dynobj, name);
+	      if (sreloc == NULL)
+		{
+		  flagword flags;
+
+		  sreloc = bfd_make_section (dynobj, name);
+		  flags = (SEC_HAS_CONTENTS | SEC_READONLY
+			   | SEC_IN_MEMORY | SEC_LINKER_CREATED);
+		  if ((sec->flags & SEC_ALLOC) != 0)
+		    flags |= SEC_ALLOC | SEC_LOAD;
+		  if (sreloc == NULL
+		      || ! bfd_set_section_flags (dynobj, sreloc, flags)
+		      || ! bfd_set_section_alignment (dynobj, sreloc, 2))
+		    return false;
+		}
+	    }
+
+	  sreloc->_raw_size += sizeof (Elf32_External_Rela);
+
+	  /* FIXME: We should here do what the m68k and i386
+	     backends do: if the reloc is pc-relative, record it
+	     in case it turns out that the reloc is unnecessary
+	     because the symbol is forced local by versioning or
+	     we are linking with -Bdynamic.  Fortunately this
+	     case is not frequent.  */
+	}
+    }
+
+  return true;
+}
+
+
+/* Finish up the dynamic sections.  */
+/* XXX hack alert bogus This routine is mostly all junk and almost
+ * certainly does the wrong thing.  Its here simply because it does
+ * just enough to allow glibc-2.1 ld.so to compile & link.
+ */
+
+static boolean
+i370_elf_finish_dynamic_sections (output_bfd, info)
+     bfd *output_bfd;
+     struct bfd_link_info *info;
+{
+  asection *sdyn;
+  bfd *dynobj = elf_hash_table (info)->dynobj;
+  asection *sgot = bfd_get_section_by_name (dynobj, ".got");
+
+#ifdef DEBUG
+  fprintf (stderr, "i370_elf_finish_dynamic_sections called\n");
+#endif
+
+  sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
+
+  if (elf_hash_table (info)->dynamic_sections_created)
+    {
+      asection *splt;
+      Elf32_External_Dyn *dyncon, *dynconend;
+
+      splt = bfd_get_section_by_name (dynobj, ".plt");
+      BFD_ASSERT (splt != NULL && sdyn != NULL);
+
+      dyncon = (Elf32_External_Dyn *) sdyn->contents;
+      dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
+      for (; dyncon < dynconend; dyncon++)
+	{
+	  Elf_Internal_Dyn dyn;
+	  const char *name;
+	  boolean size;
+
+	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
+
+	  switch (dyn.d_tag)
+	    {
+	    case DT_PLTGOT:   name = ".plt";	  size = false; break;
+	    case DT_PLTRELSZ: name = ".rela.plt"; size = true;  break;
+	    case DT_JMPREL:   name = ".rela.plt"; size = false; break;
+	    default:	      name = NULL;	  size = false; break;
+	    }
+
+	  if (name != NULL)
+	    {
+	      asection *s;
+
+	      s = bfd_get_section_by_name (output_bfd, name);
+	      if (s == NULL)
+		dyn.d_un.d_val = 0;
+	      else
+		{
+		  if (! size)
+		    dyn.d_un.d_ptr = s->vma;
+		  else
+		    {
+		      if (s->_cooked_size != 0)
+			dyn.d_un.d_val = s->_cooked_size;
+		      else
+			dyn.d_un.d_val = s->_raw_size;
+		    }
+		}
+	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+	    }
+	}
+    }
+
+  /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
+     easily find the address of the _GLOBAL_OFFSET_TABLE_.  */
+/* XXX this is clearly very wrong for the 370 arch */
+  if (sgot)
+    {
+      unsigned char *contents = sgot->contents;
+      bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
+
+      if (sdyn == NULL)
+	bfd_put_32 (output_bfd, (bfd_vma) 0, contents+4);
+      else
+	bfd_put_32 (output_bfd,
+		    sdyn->output_section->vma + sdyn->output_offset,
+		    contents+4);
+
+      elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
+    }
+
+  if (info->shared)
+    {
+      asection *sdynsym;
+      asection *s;
+      Elf_Internal_Sym sym;
+      int maxdindx = 0;
+
+      /* Set up the section symbols for the output sections.  */
+
+      sdynsym = bfd_get_section_by_name (dynobj, ".dynsym");
+      BFD_ASSERT (sdynsym != NULL);
+
+      sym.st_size = 0;
+      sym.st_name = 0;
+      sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
+      sym.st_other = 0;
+
+      for (s = output_bfd->sections; s != NULL; s = s->next)
+	{
+	  int indx, dindx;
+
+	  sym.st_value = s->vma;
+
+	  indx = elf_section_data (s)->this_idx;
+	  dindx = elf_section_data (s)->dynindx;
+	  if (dindx != -1)
+	    {
+	      BFD_ASSERT(indx > 0);
+	      BFD_ASSERT(dindx > 0);
+
+	      if (dindx > maxdindx)
+		maxdindx = dindx;
+
+	      sym.st_shndx = indx;
+
+	      bfd_elf32_swap_symbol_out (output_bfd, &sym,
+					 (PTR) (((Elf32_External_Sym *)
+						 sdynsym->contents)
+						+ dindx));
+	    }
+	}
+
+      /* Set the sh_info field of the output .dynsym section to the
+         index of the first global symbol.  */
+      elf_section_data (sdynsym->output_section)->this_hdr.sh_info =
+	maxdindx + 1;
+    }
+
+  return true;
+}
+
+
+/* The RELOCATE_SECTION function is called by the ELF backend linker
+   to handle the relocations for a section.
+
+   The relocs are always passed as Rela structures; if the section
+   actually uses Rel structures, the r_addend field will always be
+   zero.
+
+   This function is responsible for adjust the section contents as
+   necessary, and (if using Rela relocs and generating a
+   relocateable output file) adjusting the reloc addend as
+   necessary.
+
+   This function does not have to worry about setting the reloc
+   address or the reloc symbol index.
+
+   LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+   LOCAL_SECTIONS is an array giving the section in the input file
+   corresponding to the st_shndx field of each local symbol.
+
+   The global hash table entry for the global symbols can be found
+   via elf_sym_hashes (input_bfd).
+
+   When generating relocateable output, this function must handle
+   STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
+   going to be the section symbol corresponding to the output
+   section, which means that the addend must be adjusted
+   accordingly.  */
+
+static boolean
+i370_elf_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;
+{
+  Elf_Internal_Shdr *symtab_hdr		  = &elf_tdata (input_bfd)->symtab_hdr;
+  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
+  bfd *dynobj				  = elf_hash_table (info)->dynobj;
+  Elf_Internal_Rela *rel		  = relocs;
+  Elf_Internal_Rela *relend		  = relocs + input_section->reloc_count;
+  asection *sreloc			  = NULL;
+  bfd_vma *local_got_offsets;
+  boolean ret				  = true;
+
+#ifdef DEBUG
+  fprintf (stderr, "i370_elf_relocate_section called for %s section %s, %ld relocations%s\n",
+	   bfd_get_filename (input_bfd),
+	   bfd_section_name(input_bfd, input_section),
+	   (long)input_section->reloc_count,
+	   (info->relocateable) ? " (relocatable)" : "");
+#endif
+
+  if (!i370_elf_howto_table[ R_I370_ADDR31 ])	/* Initialize howto table if needed */
+    i370_elf_howto_init ();
+
+  local_got_offsets = elf_local_got_offsets (input_bfd);
+
+  for (; rel < relend; rel++)
+    {
+      enum i370_reloc_type r_type	= (enum i370_reloc_type)ELF32_R_TYPE (rel->r_info);
+      bfd_vma offset			= rel->r_offset;
+      bfd_vma addend			= rel->r_addend;
+      bfd_reloc_status_type r		= bfd_reloc_other;
+      Elf_Internal_Sym *sym		= (Elf_Internal_Sym *)0;
+      asection *sec			= (asection *)0;
+      struct elf_link_hash_entry *h	= (struct elf_link_hash_entry *)0;
+      const char *sym_name		= (const char *)0;
+      reloc_howto_type *howto;
+      unsigned long r_symndx;
+      bfd_vma relocation;
+
+      /* Unknown relocation handling */
+      if ((unsigned)r_type >= (unsigned)R_I370_max
+	  || !i370_elf_howto_table[(int)r_type])
+	{
+	  (*_bfd_error_handler) ("%s: unknown relocation type %d",
+				 bfd_get_filename (input_bfd),
+				 (int)r_type);
+
+	  bfd_set_error (bfd_error_bad_value);
+	  ret = false;
+	  continue;
+	}
+
+      howto = i370_elf_howto_table[(int)r_type];
+      r_symndx = ELF32_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 ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+		{
+		  sec = local_sections[r_symndx];
+		  addend = rel->r_addend += sec->output_offset + sym->st_value;
+		}
+	    }
+
+#ifdef DEBUG
+	  fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
+		   howto->name,
+		   (int)r_type,
+		   r_symndx,
+		   (long)offset,
+		   (long)addend);
+#endif
+	  continue;
+	}
+
+      /* This is a final link.  */
+      if (r_symndx < symtab_hdr->sh_info)
+	{
+	  sym = local_syms + r_symndx;
+	  sec = local_sections[r_symndx];
+	  sym_name = "<local symbol>";
+
+	  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;
+	  sym_name = h->root.root.string;
+	  if (h->root.type == bfd_link_hash_defined
+	      || h->root.type == bfd_link_hash_defweak)
+	    {
+	      sec = h->root.u.def.section;
+	      if (info->shared
+		  && ((! info->symbolic && h->dynindx != -1)
+		      || (h->elf_link_hash_flags
+			  & ELF_LINK_HASH_DEF_REGULAR) == 0)
+		  && (input_section->flags & SEC_ALLOC) != 0
+		  && (r_type == R_I370_ADDR31
+		      || r_type == R_I370_COPY
+		      || r_type == R_I370_ADDR16
+		      || r_type == R_I370_RELATIVE))
+		{
+		  /* In these cases, we don't need the relocation
+                     value.  We check specially because in some
+                     obscure cases sec->output_section will be NULL.  */
+		  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->shared)
+	    relocation = 0;
+	  else
+	    {
+	      (*info->callbacks->undefined_symbol)(info,
+						   h->root.root.string,
+						   input_bfd,
+						   input_section,
+						   rel->r_offset);
+	      ret = false;
+	      continue;
+	    }
+	}
+
+      switch ((int)r_type)
+	{
+	default:
+	  (*_bfd_error_handler) ("%s: unknown relocation type %d for symbol %s",
+				 bfd_get_filename (input_bfd),
+				 (int)r_type, sym_name);
+
+	  bfd_set_error (bfd_error_bad_value);
+	  ret = false;
+	  continue;
+
+	/* Relocations that may need to be propagated if this is a shared
+           object.  */
+	case (int)R_I370_REL31:
+	  /* If these relocations are not to a named symbol, they can be
+	     handled right here, no need to bother the dynamic linker.  */
+	  if (h == NULL
+	      || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
+	    break;
+	/* fall through */
+
+	/* Relocations that always need to be propagated if this is a shared
+           object.  */
+	case (int)R_I370_NONE:
+	case (int)R_I370_ADDR31:
+	case (int)R_I370_ADDR16:
+	  if (info->shared)
+	    {
+	      Elf_Internal_Rela outrel;
+	      boolean skip;
+
+#ifdef DEBUG
+	      fprintf (stderr,
+		       "i370_elf_relocate_section needs to create relocation for %s\n",
+		       (h && h->root.root.string) ? h->root.root.string : "<unknown>");
+#endif
+
+	      /* When generating a shared object, these relocations
+                 are copied into the output file to be resolved at run
+                 time.  */
+
+	      if (sreloc == NULL)
+		{
+		  const char *name;
+
+		  name = (bfd_elf_string_from_elf_section
+			  (input_bfd,
+			   elf_elfheader (input_bfd)->e_shstrndx,
+			   elf_section_data (input_section)->rel_hdr.sh_name));
+		  if (name == NULL)
+		    return false;
+
+		  BFD_ASSERT (strncmp (name, ".rela", 5) == 0
+			      && strcmp (bfd_get_section_name (input_bfd,
+							       input_section),
+					 name + 5) == 0);
+
+		  sreloc = bfd_get_section_by_name (dynobj, name);
+		  BFD_ASSERT (sreloc != NULL);
+		}
+
+	      skip = false;
+
+	      if (elf_section_data (input_section)->stab_info == NULL)
+		outrel.r_offset = rel->r_offset;
+	      else
+		{
+		  bfd_vma off;
+
+		  off = (_bfd_stab_section_offset
+			 (output_bfd, &elf_hash_table (info)->stab_info,
+			  input_section,
+			  &elf_section_data (input_section)->stab_info,
+			  rel->r_offset));
+		  if (off == (bfd_vma) -1)
+		    skip = true;
+		  outrel.r_offset = off;
+		}
+
+	      outrel.r_offset += (input_section->output_section->vma
+				  + input_section->output_offset);
+
+	      if (skip)
+		memset (&outrel, 0, sizeof outrel);
+	      /* h->dynindx may be -1 if this symbol was marked to
+                 become local.  */
+	      else if (h != NULL
+		       && ((! info->symbolic && h->dynindx != -1)
+			   || (h->elf_link_hash_flags
+			       & ELF_LINK_HASH_DEF_REGULAR) == 0))
+		{
+		  BFD_ASSERT (h->dynindx != -1);
+		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
+		  outrel.r_addend = rel->r_addend;
+		}
+	      else
+		{
+		  if (r_type == R_I370_ADDR31)
+		    {
+		      outrel.r_info = ELF32_R_INFO (0, R_I370_RELATIVE);
+		      outrel.r_addend = relocation + rel->r_addend;
+		    }
+		  else
+		    {
+		      long indx;
+
+		      if (h == NULL)
+			sec = local_sections[r_symndx];
+		      else
+			{
+			  BFD_ASSERT (h->root.type == bfd_link_hash_defined
+				      || (h->root.type
+					  == bfd_link_hash_defweak));
+			  sec = h->root.u.def.section;
+			}
+		      if (sec != NULL && bfd_is_abs_section (sec))
+			indx = 0;
+		      else if (sec == NULL || sec->owner == NULL)
+			{
+			  bfd_set_error (bfd_error_bad_value);
+			  return false;
+			}
+		      else
+			{
+			  asection *osec;
+
+			  osec = sec->output_section;
+			  indx = elf_section_data (osec)->dynindx;
+			  BFD_ASSERT(indx > 0);
+#ifdef DEBUG
+			  if (indx <= 0)
+			    {
+			      printf("indx=%d section=%s flags=%08x name=%s\n",
+				     indx, osec->name, osec->flags,
+				     h->root.root.string);
+			    }
+#endif
+			}
+
+		      outrel.r_info = ELF32_R_INFO (indx, r_type);
+		      outrel.r_addend = relocation + rel->r_addend;
+		    }
+		}
+
+	      bfd_elf32_swap_reloca_out (output_bfd, &outrel,
+					 (((Elf32_External_Rela *)
+					   sreloc->contents)
+					  + sreloc->reloc_count));
+	      ++sreloc->reloc_count;
+
+	      /* This reloc will be computed at runtime, so there's no
+                 need to do anything now, unless this is a RELATIVE
+                 reloc in an unallocated section.  */
+	      if (skip
+		  || (input_section->flags & SEC_ALLOC) != 0
+		  || ELF32_R_TYPE (outrel.r_info) != R_I370_RELATIVE)
+		continue;
+	    }
+	  break;
+
+	case (int)R_I370_COPY:
+	case (int)R_I370_RELATIVE:
+	  (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.",
+				 bfd_get_filename (input_bfd),
+				 i370_elf_howto_table[ (int)r_type ]->name,
+				 sym_name);
+
+	  bfd_set_error (bfd_error_invalid_operation);
+	  ret = false;
+	  continue;
+	}
+
+
+#ifdef DEBUG
+      fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, offset = %ld, addend = %ld\n",
+	       howto->name,
+	       (int)r_type,
+	       sym_name,
+	       r_symndx,
+	       (long)offset,
+	       (long)addend);
+#endif
+
+      r = _bfd_final_link_relocate (howto,
+				    input_bfd,
+				    input_section,
+				    contents,
+				    offset,
+				    relocation,
+				    addend);
+
+      if (r != bfd_reloc_ok)
+	{
+	  ret = false;
+	  switch (r)
+	    {
+	    default:
+	      break;
+
+	    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)
+		      break;
+
+		    if (*name == '\0')
+		      name = bfd_section_name (input_bfd, sec);
+		  }
+
+		(*info->callbacks->reloc_overflow)(info,
+						   name,
+						   howto->name,
+						   (bfd_vma) 0,
+						   input_bfd,
+						   input_section,
+						   offset);
+	      }
+	      break;
+
+	    }
+	}
+    }
+
+
+#ifdef DEBUG
+  fprintf (stderr, "\n");
+#endif
+
+  return ret;
+}
+
+static void
+i370_elf_post_process_headers (abfd, link_info)
+    bfd * abfd;
+    struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
+{
+  Elf_Internal_Ehdr * i_ehdrp;  /* Elf file header, internal form */
+
+  i_ehdrp = elf_elfheader (abfd);
+  i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
+}
+
+#define TARGET_BIG_SYM		bfd_elf32_i370_vec
+#define TARGET_BIG_NAME		"elf32-i370"
+#define ELF_ARCH		bfd_arch_i370
+#define ELF_MACHINE_CODE	EM_S370
+#ifdef EM_I370_OLD
+#define ELF_MACHINE_ALT1	EM_I370_OLD
+#endif
+#define ELF_MAXPAGESIZE		0x1000
+#define elf_info_to_howto	i370_elf_info_to_howto
+
+
+
+#define elf_backend_plt_not_loaded 1
+#define elf_backend_got_symbol_offset 4
+
+#define bfd_elf32_bfd_reloc_type_lookup		i370_elf_reloc_type_lookup
+#define bfd_elf32_bfd_set_private_flags		i370_elf_set_private_flags
+#define bfd_elf32_bfd_copy_private_bfd_data	i370_elf_copy_private_bfd_data
+#define bfd_elf32_bfd_merge_private_bfd_data	i370_elf_merge_private_bfd_data
+#define elf_backend_relocate_section		i370_elf_relocate_section
+
+/* dynamic loader support is mostly broken; just enough here to be able to
+ * link glibc's ld.so without errors.
+ */
+#define elf_backend_create_dynamic_sections	i370_elf_create_dynamic_sections
+#define elf_backend_size_dynamic_sections	i370_elf_size_dynamic_sections
+#define elf_backend_finish_dynamic_sections	i370_elf_finish_dynamic_sections
+#define elf_backend_fake_sections		i370_elf_fake_sections
+#define elf_backend_section_from_shdr		i370_elf_section_from_shdr
+#define elf_backend_adjust_dynamic_symbol	i370_elf_adjust_dynamic_symbol
+#define elf_backend_check_relocs		i370_elf_check_relocs
+
+/*
+#define elf_backend_add_symbol_hook		i370_elf_add_symbol_hook
+#define elf_backend_finish_dynamic_symbol	i370_elf_finish_dynamic_symbol
+#define elf_backend_additional_program_headers	i370_elf_additional_program_headers
+#define elf_backend_modify_segment_map		i370_elf_modify_segment_map
+*/
+
+#define elf_backend_post_process_headers	i370_elf_post_process_headers
+
+int i370_noop()
+{
+  return 1;
+}
+
+/* we need to define these at least as no-ops to link glibc ld.so */
+
+#define elf_backend_add_symbol_hook \
+  (boolean (*) PARAMS ((bfd *, struct bfd_link_info *, \
+			const char *, Elf_Internal_Sym *, \
+			asection *))) 				i370_noop
+#define elf_backend_finish_dynamic_symbol \
+  (boolean (*) PARAMS ((bfd *, struct bfd_link_info *, \
+			struct elf_link_hash_entry *, \
+			Elf_Internal_Sym *)))			i370_noop
+#define elf_backend_additional_program_headers \
+  (int (*) PARAMS ((bfd *)))					i370_noop
+#define elf_backend_modify_segment_map \
+  (boolean (*) PARAMS ((bfd *)))				i370_noop
+
+#include "elf32-target.h"