19990502 sourceware import

1 files changed, 892 insertions, 0 deletions

diff --git a/bfd/nlm32-alpha.c b/bfd/nlm32-alpha.c
new file mode 100644
index 0000000000..24c8e51676
--- /dev/null
+++ b/bfd/nlm32-alpha.c
@@ -0,0 +1,892 @@
+/* Support for 32-bit Alpha NLM (NetWare Loadable Module)
+   Copyright (C) 1993 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor, Cygnus Support.
+
+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 describes the 32 bit Alpha NLM format.  You might think
+   that an Alpha chip would use a 64 bit format, but, for some reason,
+   it doesn't.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+
+#define ARCH_SIZE 32
+
+#include "nlm/alpha-ext.h"
+#define Nlm_External_Fixed_Header	Nlm32_alpha_External_Fixed_Header
+
+#include "libnlm.h"
+
+static boolean nlm_alpha_backend_object_p
+  PARAMS ((bfd *));
+static boolean nlm_alpha_write_prefix
+  PARAMS ((bfd *));
+static boolean nlm_alpha_read_reloc
+  PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *));
+static boolean nlm_alpha_mangle_relocs
+  PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type));
+static boolean nlm_alpha_read_import
+  PARAMS ((bfd *, nlmNAME(symbol_type) *));
+static boolean nlm_alpha_write_import
+  PARAMS ((bfd *, asection *, arelent *));
+static boolean nlm_alpha_set_public_section
+  PARAMS ((bfd *, nlmNAME(symbol_type) *));
+static bfd_vma nlm_alpha_get_public_offset
+  PARAMS ((bfd *, asymbol *));
+static boolean nlm_alpha_write_external
+  PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *));
+
+/* Alpha NLM's have a prefix header before the standard NLM.  This
+   function reads it in, verifies the version, and seeks the bfd to
+   the location before the regular NLM header.  */
+
+static boolean
+nlm_alpha_backend_object_p (abfd)
+     bfd *abfd;
+{
+  struct nlm32_alpha_external_prefix_header s;
+  bfd_size_type size;
+
+  if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
+    return false;
+
+  if (bfd_h_get_32 (abfd, s.magic) != NLM32_ALPHA_MAGIC)
+    return false;
+
+  /* FIXME: Should we check the format number?  */
+
+  /* Skip to the end of the header.  */
+  size = bfd_h_get_32 (abfd, s.size);
+  if (bfd_seek (abfd, size, SEEK_SET) != 0)
+    return false;
+
+  return true;
+}
+
+/* Write out the prefix.  */
+
+static boolean
+nlm_alpha_write_prefix (abfd)
+     bfd *abfd;
+{
+  struct nlm32_alpha_external_prefix_header s;
+
+  memset (&s, 0, sizeof s);
+  bfd_h_put_32 (abfd, (bfd_vma) NLM32_ALPHA_MAGIC, s.magic);
+  bfd_h_put_32 (abfd, (bfd_vma) 2, s.format);
+  bfd_h_put_32 (abfd, (bfd_vma) sizeof s, s.size);
+  if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s)
+    return false;
+  return true;
+}
+
+/* How to process the various reloc types.  */
+
+static reloc_howto_type nlm32_alpha_howto_table[] =
+{
+  /* Reloc type 0 is ignored by itself.  However, it appears after a
+     GPDISP reloc to identify the location where the low order 16 bits
+     of the gp register are loaded.  */
+  HOWTO (ALPHA_R_IGNORE,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 8,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "IGNORE",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 32 bit reference to a symbol.  */
+  HOWTO (ALPHA_R_REFLONG,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "REFLONG",		/* name */
+	 true,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 64 bit reference to a symbol.  */
+  HOWTO (ALPHA_R_REFQUAD,	/* type */
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "REFQUAD",		/* name */
+	 true,			/* partial_inplace */
+	 0xffffffffffffffff,	/* src_mask */
+	 0xffffffffffffffff,	/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 32 bit GP relative offset.  This is just like REFLONG except
+     that when the value is used the value of the gp register will be
+     added in.  */
+  HOWTO (ALPHA_R_GPREL32,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_bitfield, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "GPREL32",		/* name */
+	 true,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Used for an instruction that refers to memory off the GP
+     register.  The offset is 16 bits of the 32 bit instruction.  This
+     reloc always seems to be against the .lita section.  */
+  HOWTO (ALPHA_R_LITERAL,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "LITERAL",		/* name */
+	 true,			/* partial_inplace */
+	 0xffff,		/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* This reloc only appears immediately following a LITERAL reloc.
+     It identifies a use of the literal.  It seems that the linker can
+     use this to eliminate a portion of the .lita section.  The symbol
+     index is special: 1 means the literal address is in the base
+     register of a memory format instruction; 2 means the literal
+     address is in the byte offset register of a byte-manipulation
+     instruction; 3 means the literal address is in the target
+     register of a jsr instruction.  This does not actually do any
+     relocation.  */
+  HOWTO (ALPHA_R_LITUSE,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "LITUSE",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Load the gp register.  This is always used for a ldah instruction
+     which loads the upper 16 bits of the gp register.  The next reloc
+     will be an IGNORE reloc which identifies the location of the lda
+     instruction which loads the lower 16 bits.  The symbol index of
+     the GPDISP instruction appears to actually be the number of bytes
+     between the ldah and lda instructions.  This gives two different
+     ways to determine where the lda instruction is; I don't know why
+     both are used.  The value to use for the relocation is the
+     difference between the GP value and the current location; the
+     load will always be done against a register holding the current
+     address.  */
+  HOWTO (ALPHA_R_GPDISP,	/* type */
+	 16,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "GPDISP",		/* name */
+	 true,			/* partial_inplace */
+	 0xffff,		/* src_mask */
+	 0xffff,		/* dst_mask */
+	 true),			/* pcrel_offset */
+
+  /* A 21 bit branch.  The native assembler generates these for
+     branches within the text segment, and also fills in the PC
+     relative offset in the instruction.  It seems to me that this
+     reloc, unlike the others, is not partial_inplace.  */
+  HOWTO (ALPHA_R_BRADDR,	/* type */
+	 2,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 21,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "BRADDR",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0x1fffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A hint for a jump to a register.  */
+  HOWTO (ALPHA_R_HINT,		/* type */
+	 2,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 14,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "HINT",		/* name */
+	 true,			/* partial_inplace */
+	 0x3fff,		/* src_mask */
+	 0x3fff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* 16 bit PC relative offset.  */
+  HOWTO (ALPHA_R_SREL16,	/* type */
+	 0,			/* rightshift */
+	 1,			/* size (0 = byte, 1 = short, 2 = long) */
+	 16,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "SREL16",		/* name */
+	 true,			/* partial_inplace */
+	 0xffff,		/* src_mask */
+	 0xffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* 32 bit PC relative offset.  */
+  HOWTO (ALPHA_R_SREL32,	/* type */
+	 0,			/* rightshift */
+	 2,			/* size (0 = byte, 1 = short, 2 = long) */
+	 32,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "SREL32",		/* name */
+	 true,			/* partial_inplace */
+	 0xffffffff,		/* src_mask */
+	 0xffffffff,		/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* A 64 bit PC relative offset.  */
+  HOWTO (ALPHA_R_SREL64,	/* type */
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 true,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_signed, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "SREL64",		/* name */
+	 true,			/* partial_inplace */
+	 0xffffffffffffffff,	/* src_mask */
+	 0xffffffffffffffff,	/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Push a value on the reloc evaluation stack.  */
+  HOWTO (ALPHA_R_OP_PUSH,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "OP_PUSH",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Store the value from the stack at the given address.  Store it in
+     a bitfield of size r_size starting at bit position r_offset.  */
+  HOWTO (ALPHA_R_OP_STORE,	/* type */
+	 0,			/* rightshift */
+	 4,			/* size (0 = byte, 1 = short, 2 = long) */
+	 64,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "OP_STORE",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0xffffffffffffffff,	/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Subtract the reloc address from the value on the top of the
+     relocation stack.  */
+  HOWTO (ALPHA_R_OP_PSUB,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "OP_PSUB",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Shift the value on the top of the relocation stack right by the
+     given value.  */
+  HOWTO (ALPHA_R_OP_PRSHIFT,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			 /* special_function */
+	 "OP_PRSHIFT",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false),		/* pcrel_offset */
+
+  /* Adjust the GP value for a new range in the object file.  */
+  HOWTO (ALPHA_R_GPVALUE,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "GPVALUE",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false)			/* pcrel_offset */
+};
+
+static reloc_howto_type nlm32_alpha_nw_howto =
+  HOWTO (ALPHA_R_NW_RELOC,	/* type */
+	 0,			/* rightshift */
+	 0,			/* size (0 = byte, 1 = short, 2 = long) */
+	 0,			/* bitsize */
+	 false,			/* pc_relative */
+	 0,			/* bitpos */
+	 complain_overflow_dont, /* complain_on_overflow */
+	 0,			/* special_function */
+	 "NW_RELOC",		/* name */
+	 false,			/* partial_inplace */
+	 0,			/* src_mask */
+	 0,			/* dst_mask */
+	 false);		/* pcrel_offset */
+
+/* Read an Alpha NLM reloc.  This routine keeps some static data which
+   it uses when handling local relocs.  This only works correctly
+   because all the local relocs are read at once.  */
+
+static boolean
+nlm_alpha_read_reloc (abfd, sym, secp, rel)
+     bfd *abfd;
+     nlmNAME(symbol_type) *sym;
+     asection **secp;
+     arelent *rel;
+{
+  static bfd_vma gp_value;
+  static bfd_vma lita_address;
+  struct nlm32_alpha_external_reloc ext;
+  bfd_vma r_vaddr;
+  long r_symndx;
+  int r_type, r_extern, r_offset, r_size;
+  asection *code_sec, *data_sec;
+
+  /* Read the reloc from the file.  */
+  if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext)
+    return false;
+
+  /* Swap in the reloc information.  */
+  r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext.r_vaddr);
+  r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext.r_symndx);
+
+  BFD_ASSERT (bfd_little_endian (abfd));
+
+  r_type = ((ext.r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
+	    >> RELOC_BITS0_TYPE_SH_LITTLE);
+  r_extern = (ext.r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
+  r_offset = ((ext.r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
+	      >> RELOC_BITS1_OFFSET_SH_LITTLE);
+  /* Ignore the reserved bits.  */
+  r_size = ((ext.r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
+	    >> RELOC_BITS3_SIZE_SH_LITTLE);
+
+  /* Fill in the BFD arelent structure.  */
+  code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+  data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+  if (r_extern)
+    {
+      /* External relocations are only used for imports.  */
+      BFD_ASSERT (sym != NULL);
+      /* We don't need to set sym_ptr_ptr for this case.  It is set in
+	 nlm_canonicalize_reloc.  */
+      rel->sym_ptr_ptr = NULL;
+      rel->addend = 0;
+    }
+  else
+    {
+      /* Internal relocations are only used for local relocation
+	 fixups.  If they are not NW_RELOC or GPDISP or IGNORE, they
+	 must be against .text or .data.  */
+      BFD_ASSERT (r_type == ALPHA_R_NW_RELOC || sym == NULL);
+      if (r_type == ALPHA_R_NW_RELOC
+	  || r_type == ALPHA_R_GPDISP
+	  || r_type == ALPHA_R_IGNORE)
+	{
+	  rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+	  rel->addend = 0;
+	}
+      else if (r_symndx == ALPHA_RELOC_SECTION_TEXT)
+	{
+	  rel->sym_ptr_ptr = code_sec->symbol_ptr_ptr;
+	  BFD_ASSERT (bfd_get_section_vma (abfd, code_sec) == 0);
+	  rel->addend = 0;
+	}
+      else if (r_symndx == ALPHA_RELOC_SECTION_DATA)
+	{
+	  rel->sym_ptr_ptr = data_sec->symbol_ptr_ptr;
+	  rel->addend = - bfd_get_section_vma (abfd, data_sec);
+	}
+      else
+	{
+	  BFD_ASSERT (0);
+	  rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+	  rel->addend = 0;
+	}
+    }
+
+  /* We use the address to determine whether the reloc is in the .text
+     or .data section.  R_NW_RELOC relocs don't really have a section,
+     so we put them in .text.  */
+  if (r_type == ALPHA_R_NW_RELOC
+      || r_vaddr < bfd_section_size (abfd, code_sec))
+    {
+      *secp = code_sec;
+      rel->address = r_vaddr;
+    }
+  else
+    {
+      *secp = data_sec;
+      rel->address = r_vaddr - bfd_section_size (abfd, code_sec);
+    }
+
+  /* We must adjust the addend based on the type.  */
+  BFD_ASSERT ((r_type >= 0 && r_type <= ALPHA_R_GPVALUE)
+	      || r_type == ALPHA_R_NW_RELOC);
+
+  switch (r_type)
+    {
+    case ALPHA_R_BRADDR:
+    case ALPHA_R_SREL16:
+    case ALPHA_R_SREL32:
+    case ALPHA_R_SREL64:
+      /* The PC relative relocs do not seem to use the section VMA as
+	 a negative addend.  */
+      rel->addend = 0;
+      break;
+
+    case ALPHA_R_GPREL32:
+      /* Copy the gp value for this object file into the addend, to
+	 ensure that we are not confused by the linker.  */
+      if (! r_extern)
+	rel->addend += gp_value;
+      break;
+
+    case ALPHA_R_LITERAL:
+      BFD_ASSERT (! r_extern);
+      rel->addend += lita_address;
+      break;
+
+    case ALPHA_R_LITUSE:
+    case ALPHA_R_GPDISP:
+      /* The LITUSE and GPDISP relocs do not use a symbol, or an
+	 addend, but they do use a special code.  Put this code in the
+	 addend field.  */
+      rel->addend = r_symndx;
+      rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+      break;
+
+    case ALPHA_R_OP_STORE:
+      /* The STORE reloc needs the size and offset fields.  We store
+	 them in the addend.  */
+      BFD_ASSERT (r_offset < 256 && r_size < 256);
+      rel->addend = (r_offset << 8) + r_size;
+      break;
+
+    case ALPHA_R_OP_PUSH:
+    case ALPHA_R_OP_PSUB:
+    case ALPHA_R_OP_PRSHIFT:
+      /* The PUSH, PSUB and PRSHIFT relocs do not actually use an
+	 address.  I believe that the address supplied is really an
+	 addend.  */
+      rel->addend = r_vaddr;
+      break;
+
+    case ALPHA_R_GPVALUE:
+      /* Record the new gp value.  */
+      gp_value += r_symndx;
+      rel->addend = gp_value;
+      break;
+
+    case ALPHA_R_IGNORE:
+      /* If the type is ALPHA_R_IGNORE, make sure this is a reference
+	 to the absolute section so that the reloc is ignored.  For
+	 some reason the address of this reloc type is not adjusted by
+	 the section vma.  We record the gp value for this object file
+	 here, for convenience when doing the GPDISP relocation.  */
+      rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+      rel->address = r_vaddr;
+      rel->addend = gp_value;
+      break;
+
+    case ALPHA_R_NW_RELOC:
+      /* If this is SETGP, we set the addend to 0.  Otherwise we set
+	 the addend to the size of the .lita section (this is
+	 r_symndx) plus 1.  We have already set the address of the
+	 reloc to r_vaddr.  */
+      if (r_size == ALPHA_R_NW_RELOC_SETGP)
+	{
+	  gp_value = r_vaddr;
+	  rel->addend = 0;
+	}
+      else if (r_size == ALPHA_R_NW_RELOC_LITA)
+	{
+	  lita_address = r_vaddr;
+	  rel->addend = r_symndx + 1;
+	}
+      else
+	BFD_ASSERT (0);
+      rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+      break;
+
+    default:
+      break;
+    }
+
+  if (r_type == ALPHA_R_NW_RELOC)
+    rel->howto = &nlm32_alpha_nw_howto;
+  else
+    rel->howto = &nlm32_alpha_howto_table[r_type];
+
+  return true;
+}
+
+/* Mangle Alpha NLM relocs for output.  */
+
+static boolean
+nlm_alpha_mangle_relocs (abfd, sec, data, offset, count)
+     bfd *abfd;
+     asection *sec;
+     PTR data;
+     bfd_vma offset;
+     bfd_size_type count;
+{
+  return true;
+}
+
+/* Read an ALPHA NLM import record */
+
+static boolean
+nlm_alpha_read_import (abfd, sym)
+     bfd *abfd;
+     nlmNAME(symbol_type) *sym;
+{
+  struct nlm_relent *nlm_relocs;	/* relocation records for symbol */
+  bfd_size_type rcount;			/* number of relocs */
+  bfd_byte temp[NLM_TARGET_LONG_SIZE];	/* temporary 32-bit value */
+  unsigned char symlength;		/* length of symbol name */
+  char *name;
+
+  if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
+      != sizeof (symlength))
+    return false;
+  sym -> symbol.the_bfd = abfd;
+  name = bfd_alloc (abfd, symlength + 1);
+  if (name == NULL)
+    return false;
+  if (bfd_read (name, symlength, 1, abfd) != symlength)
+    return false;
+  name[symlength] = '\0';
+  sym -> symbol.name = name;
+  sym -> symbol.flags = 0;
+  sym -> symbol.value = 0;
+  sym -> symbol.section = bfd_und_section_ptr;
+  if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
+    return false;
+  rcount = bfd_h_get_32 (abfd, temp);
+  nlm_relocs = ((struct nlm_relent *)
+		bfd_alloc (abfd, rcount * sizeof (struct nlm_relent)));
+  if (!nlm_relocs)
+    return false;
+  sym -> relocs = nlm_relocs;
+  sym -> rcnt = 0;
+  while (sym -> rcnt < rcount)
+    {
+      asection *section;
+      
+      if (nlm_alpha_read_reloc (abfd, sym, &section,
+				&nlm_relocs -> reloc)
+	  == false)
+	return false;
+      nlm_relocs -> section = section;
+      nlm_relocs++;
+      sym -> rcnt++;
+    }
+
+  return true;
+}
+
+/* Write an Alpha NLM reloc.  */
+
+static boolean
+nlm_alpha_write_import (abfd, sec, rel)
+     bfd *abfd;
+     asection *sec;
+     arelent *rel;
+{
+  asymbol *sym;
+  bfd_vma r_vaddr;
+  long r_symndx;
+  int r_type, r_extern, r_offset, r_size;
+  struct nlm32_alpha_external_reloc ext;
+
+  sym = *rel->sym_ptr_ptr;
+
+  /* Get values for the relocation fields.  */
+  r_type = rel->howto->type;
+  if (r_type != ALPHA_R_NW_RELOC)
+    {
+      r_vaddr = bfd_get_section_vma (abfd, sec) + rel->address;
+      if ((sec->flags & SEC_CODE) == 0)
+	r_vaddr += bfd_section_size (abfd,
+				     bfd_get_section_by_name (abfd,
+							      NLM_CODE_NAME));
+      if (bfd_is_und_section (bfd_get_section (sym)))
+	{
+	  r_extern = 1;
+	  r_symndx = 0;
+	}
+      else
+	{
+	  r_extern = 0;
+	  if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
+	    r_symndx = ALPHA_RELOC_SECTION_TEXT;
+	  else
+	    r_symndx = ALPHA_RELOC_SECTION_DATA;
+	}
+      r_offset = 0;
+      r_size = 0;
+
+      switch (r_type)
+	{
+	case ALPHA_R_LITUSE:
+	case ALPHA_R_GPDISP:
+	  r_symndx = rel->addend;
+	  break;
+
+	case ALPHA_R_OP_STORE:
+	  r_size = rel->addend & 0xff;
+	  r_offset = (rel->addend >> 8) & 0xff;
+	  break;
+
+	case ALPHA_R_OP_PUSH:
+	case ALPHA_R_OP_PSUB:
+	case ALPHA_R_OP_PRSHIFT:
+	  r_vaddr = rel->addend;
+	  break;
+
+	case ALPHA_R_IGNORE:
+	  r_vaddr = rel->address;
+	  break;
+
+	default:
+	  break;
+	}
+    }
+  else
+    {
+      /* r_type == ALPHA_R_NW_RELOC */
+      r_vaddr = rel->address;
+      if (rel->addend == 0)
+	{
+	  r_symndx = 0;
+	  r_size = ALPHA_R_NW_RELOC_SETGP;
+	}
+      else
+	{
+	  r_symndx = rel->addend - 1;
+	  r_size = ALPHA_R_NW_RELOC_LITA;
+	}
+      r_extern = 0;
+      r_offset = 0;
+    }
+
+  /* Swap out the relocation fields.  */
+  bfd_h_put_64 (abfd, r_vaddr, (bfd_byte *) ext.r_vaddr);
+  bfd_h_put_32 (abfd, r_symndx, (bfd_byte *) ext.r_symndx);
+
+  BFD_ASSERT (bfd_little_endian (abfd));
+
+  ext.r_bits[0] = ((r_type << RELOC_BITS0_TYPE_SH_LITTLE)
+		   & RELOC_BITS0_TYPE_LITTLE);
+  ext.r_bits[1] = ((r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0)
+		   | ((r_offset << RELOC_BITS1_OFFSET_SH_LITTLE)
+		      & RELOC_BITS1_OFFSET_LITTLE));
+  ext.r_bits[2] = 0;
+  ext.r_bits[3] = ((r_size << RELOC_BITS3_SIZE_SH_LITTLE)
+		   & RELOC_BITS3_SIZE_LITTLE);
+
+  /* Write out the relocation.  */
+  if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext)
+    return false;
+
+  return true;
+}
+
+/* Alpha NetWare does not use the high bit to determine whether a
+   public symbol is in the code segment or the data segment.  Instead,
+   it just uses the address.  The set_public_section and
+   get_public_offset routines override the default code which uses the
+   high bit.  */
+
+/* Set the section for a public symbol.  */
+
+static boolean
+nlm_alpha_set_public_section (abfd, sym)
+     bfd *abfd;
+     nlmNAME(symbol_type) *sym;
+{
+  asection *code_sec, *data_sec;
+
+  code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+  data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+  if (sym->symbol.value < bfd_section_size (abfd, code_sec))
+    {
+      sym->symbol.section = code_sec;
+      sym->symbol.flags |= BSF_FUNCTION;
+    }
+  else
+    {
+      sym->symbol.section = data_sec;
+      sym->symbol.value -= bfd_section_size (abfd, code_sec);
+      /* The data segment had better be aligned.  */
+      BFD_ASSERT ((bfd_section_size (abfd, code_sec) & 0xf) == 0);
+    }
+  return true;
+}
+
+/* Get the offset to write out for a public symbol.  */
+
+static bfd_vma
+nlm_alpha_get_public_offset (abfd, sym)
+     bfd *abfd;
+     asymbol *sym;
+{
+  return bfd_asymbol_value (sym);
+}
+
+/* Write an Alpha NLM external symbol.  */
+
+static boolean
+nlm_alpha_write_external (abfd, count, sym, relocs)
+     bfd *abfd;
+     bfd_size_type count;
+     asymbol *sym;
+     struct reloc_and_sec *relocs;
+{
+  int i;
+  bfd_byte len;
+  unsigned char temp[NLM_TARGET_LONG_SIZE];
+  arelent r;
+
+  len = strlen (sym->name);
+  if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte))
+      || bfd_write (sym->name, len, 1, abfd) != len)
+    return false;
+
+  bfd_put_32 (abfd, count + 2, temp);
+  if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp))
+    return false;
+
+  /* The first two relocs for each external symbol are the .lita
+     address and the GP value.  */
+  r.sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+  r.howto = &nlm32_alpha_nw_howto;
+
+  r.address = nlm_alpha_backend_data (abfd)->lita_address;
+  r.addend = nlm_alpha_backend_data (abfd)->lita_size + 1;
+  if (nlm_alpha_write_import (abfd, (asection *) NULL, &r) == false)
+    return false;
+
+  r.address = nlm_alpha_backend_data (abfd)->gp;
+  r.addend = 0;
+  if (nlm_alpha_write_import (abfd, (asection *) NULL, &r) == false)
+    return false;
+
+  for (i = 0; i < count; i++)
+    {
+      if (nlm_alpha_write_import (abfd, relocs[i].sec,
+				  relocs[i].rel) == false)
+	return false;
+    }
+
+  return true;
+}
+
+#include "nlmswap.h"
+
+static const struct nlm_backend_data nlm32_alpha_backend =
+{
+  "NetWare Alpha Module   \032",
+  sizeof (Nlm32_alpha_External_Fixed_Header),
+  sizeof (struct nlm32_alpha_external_prefix_header),
+  bfd_arch_alpha,
+  0,
+  true, /* no uninitialized data permitted by Alpha NetWare.  */
+  nlm_alpha_backend_object_p,
+  nlm_alpha_write_prefix,
+  nlm_alpha_read_reloc,
+  nlm_alpha_mangle_relocs,
+  nlm_alpha_read_import,
+  nlm_alpha_write_import,
+  nlm_alpha_set_public_section,
+  nlm_alpha_get_public_offset,
+  nlm_swap_fixed_header_in,
+  nlm_swap_fixed_header_out,
+  nlm_alpha_write_external,
+  0,	/* write_export */
+};
+
+#define TARGET_LITTLE_NAME		"nlm32-alpha"
+#define TARGET_LITTLE_SYM		nlmNAME(alpha_vec)
+#define TARGET_BACKEND_DATA		&nlm32_alpha_backend
+
+#include "nlm-target.h"