old-cross-binutils/bfd/elf32-ppc.c

/* PowerPC-specific support for 32-bit ELF
   Copyright 1994, 1995, 1996 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 is based on a preliminary PowerPC ELF ABI.  The
   information may not match the final PowerPC ELF ABI.  It includes
   suggestions from the in-progress Embedded PowerPC ABI, and that
   information may also not match.  */

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/ppc.h"

#define USE_RELA		/* we want RELA relocations, not REL */

/* PowerPC relocations defined by the ABIs */
enum ppc_reloc_type
{
  R_PPC_NONE			=   0,
  R_PPC_ADDR32			=   1,
  R_PPC_ADDR24			=   2,
  R_PPC_ADDR16			=   3,
  R_PPC_ADDR16_LO		=   4,
  R_PPC_ADDR16_HI		=   5,
  R_PPC_ADDR16_HA		=   6,
  R_PPC_ADDR14			=   7,
  R_PPC_ADDR14_BRTAKEN		=   8,
  R_PPC_ADDR14_BRNTAKEN		=   9,
  R_PPC_REL24			=  10,
  R_PPC_REL14			=  11,
  R_PPC_REL14_BRTAKEN		=  12,
  R_PPC_REL14_BRNTAKEN		=  13,
  R_PPC_GOT16			=  14,
  R_PPC_GOT16_LO		=  15,
  R_PPC_GOT16_HI		=  16,
  R_PPC_GOT16_HA		=  17,
  R_PPC_PLTREL24		=  18,
  R_PPC_COPY			=  19,
  R_PPC_GLOB_DAT		=  20,
  R_PPC_JMP_SLOT		=  21,
  R_PPC_RELATIVE		=  22,
  R_PPC_LOCAL24PC		=  23,
  R_PPC_UADDR32			=  24,
  R_PPC_UADDR16			=  25,
  R_PPC_REL32			=  26,
  R_PPC_PLT32			=  27,
  R_PPC_PLTREL32		=  28,
  R_PPC_PLT16_LO		=  29,
  R_PPC_PLT16_HI		=  30,
  R_PPC_PLT16_HA		=  31,
  R_PPC_SDAREL16		=  32,
  R_PPC_SECTOFF			=  33,
  R_PPC_SECTOFF_LO		=  34,
  R_PPC_SECTOFF_HI		=  35,
  R_PPC_SECTOFF_HA		=  36,

  /* The remaining relocs are from the Embedded ELF ABI, and are not
     in the SVR4 ELF ABI.  */
  R_PPC_EMB_NADDR32		= 101,
  R_PPC_EMB_NADDR16		= 102,
  R_PPC_EMB_NADDR16_LO		= 103,
  R_PPC_EMB_NADDR16_HI		= 104,
  R_PPC_EMB_NADDR16_HA		= 105,
  R_PPC_EMB_SDAI16		= 106,
  R_PPC_EMB_SDA2I16		= 107,
  R_PPC_EMB_SDA2REL		= 108,
  R_PPC_EMB_SDA21		= 109,
  R_PPC_EMB_MRKREF		= 110,
  R_PPC_EMB_RELSEC16		= 111,
  R_PPC_EMB_RELST_LO		= 112,
  R_PPC_EMB_RELST_HI		= 113,
  R_PPC_EMB_RELST_HA		= 114,
  R_PPC_EMB_BIT_FLD		= 115,
  R_PPC_EMB_RELSDA		= 116,

  /* This is a phony reloc to handle any old fashioned TOC16 references
     that may still be in object files.  */
  R_PPC_TOC16			= 255,

  R_PPC_max
};

static reloc_howto_type *ppc_elf_reloc_type_lookup
  PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
static void ppc_elf_info_to_howto
  PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rela *dst));
static void ppc_elf_howto_init PARAMS ((void));
static boolean ppc_elf_set_private_flags PARAMS ((bfd *, flagword));
static boolean ppc_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
static boolean ppc_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));

static boolean ppc_elf_section_from_shdr PARAMS ((bfd *,
						  Elf32_Internal_Shdr *,
						  char *));

static elf_linker_section_t *ppc_elf_create_linker_section
  PARAMS ((bfd *abfd,
	   struct bfd_link_info *info,
	   enum elf_linker_section_enum));

static boolean ppc_elf_check_relocs PARAMS ((bfd *,
					     struct bfd_link_info *,
					     asection *,
					     const Elf_Internal_Rela *));

static boolean ppc_elf_adjust_dynamic_symbol PARAMS ((struct bfd_link_info *,
						      struct elf_link_hash_entry *));

static boolean ppc_elf_adjust_dynindx PARAMS ((struct elf_link_hash_entry *, PTR));

static boolean ppc_elf_size_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));

static boolean ppc_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 ppc_elf_add_symbol_hook  PARAMS ((bfd *,
						 struct bfd_link_info *,
						 const Elf_Internal_Sym *,
						 const char **,
						 flagword *,
						 asection **,
						 bfd_vma *));

static boolean ppc_elf_finish_dynamic_symbol PARAMS ((bfd *,
						      struct bfd_link_info *,
						      struct elf_link_hash_entry *,
						      Elf_Internal_Sym *));

static boolean ppc_elf_finish_dynamic_sections PARAMS ((bfd *, struct bfd_link_info *));

#define BRANCH_PREDICT_BIT 0x200000		/* branch prediction bit for branch taken relocs */
#define RA_REGISTER_MASK 0x001f0000		/* mask to set RA in memory instructions */
#define RA_REGISTER_SHIFT 16			/* value to shift register by to insert RA */

/* The name of the dynamic interpreter.  This is put in the .interp
   section.  */

#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"


static reloc_howto_type *ppc_elf_howto_table[ (int)R_PPC_max ];

static reloc_howto_type ppc_elf_howto_raw[] =
{
  /* This reloc does nothing.  */
  HOWTO (R_PPC_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_PPC_NONE",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 false),		/* pcrel_offset */

  /* A standard 32 bit relocation.  */
  HOWTO (R_PPC_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_PPC_ADDR32",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* An absolute 26 bit branch; the lower two bits must be zero.
     FIXME: we don't check that, we just clear them.  */
  HOWTO (R_PPC_ADDR24,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_ADDR24",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0x3fffffc,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* A standard 16 bit relocation.  */
  HOWTO (R_PPC_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_PPC_ADDR16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* A 16 bit relocation without overflow.  */
  HOWTO (R_PPC_ADDR16_LO,	/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont,/* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_ADDR16_LO",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* The high order 16 bits of an address.  */
  HOWTO (R_PPC_ADDR16_HI,	/* type */
	 16,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_ADDR16_HI",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* The high order 16 bits of an address, plus 1 if the contents of
     the low 16 bits, treated as a signed number, is negative.	*/
  HOWTO (R_PPC_ADDR16_HA,	/* type */
	 16,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_ADDR16_HA",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* An absolute 16 bit branch; the lower two bits must be zero.
     FIXME: we don't check that, we just clear them.  */
  HOWTO (R_PPC_ADDR14,		/* type */
	 0,			/* rightshift */
	 2,			/* 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_PPC_ADDR14",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* An absolute 16 bit branch, for which bit 10 should be set to
     indicate that the branch is expected to be taken.	The lower two
     bits must be zero.	 */
  HOWTO (R_PPC_ADDR14_BRTAKEN,	/* type */
	 0,			/* rightshift */
	 2,			/* 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_PPC_ADDR14_BRTAKEN",/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* An absolute 16 bit branch, for which bit 10 should be set to
     indicate that the branch is not expected to be taken.  The lower
     two bits must be zero.  */
  HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
	 0,			/* rightshift */
	 2,			/* 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_PPC_ADDR14_BRNTAKEN",/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* A relative 26 bit branch; the lower two bits must be zero.	 */
  HOWTO (R_PPC_REL24,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_REL24",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0x3fffffc,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* A relative 16 bit branch; the lower two bits must be zero.	 */
  HOWTO (R_PPC_REL14,		/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_REL14",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* A relative 16 bit branch.	Bit 10 should be set to indicate that
     the branch is expected to be taken.  The lower two bits must be
     zero.  */
  HOWTO (R_PPC_REL14_BRTAKEN,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_REL14_BRTAKEN",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* A relative 16 bit branch.	Bit 10 should be set to indicate that
     the branch is not expected to be taken.  The lower two bits must
     be zero.  */
  HOWTO (R_PPC_REL14_BRNTAKEN,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_REL14_BRNTAKEN",/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xfffc,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
     symbol.  */
  HOWTO (R_PPC_GOT16,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_GOT16",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
     the symbol.  */
  HOWTO (R_PPC_GOT16_LO,	/* 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_PPC_GOT16_LO",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
     the symbol.  */
  HOWTO (R_PPC_GOT16_HI,	/* type */
	 16,			/* 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_PPC_GOT16_HI",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		 /* pcrel_offset */

  /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
     the symbol.  */
  HOWTO (R_PPC_GOT16_HA,	/* 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_PPC_GOT16_HA",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_REL24, but referring to the procedure linkage table
     entry for the symbol.  FIXME: Not supported.  */
  HOWTO (R_PPC_PLTREL24,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed,  /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_PLTREL24",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0x3fffffc,		/* 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.  I have no idea what the purpose
     of this is.  */
  HOWTO (R_PPC_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_PPC_COPY",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_ADDR32, but used when setting global offset table
     entries.  */
  HOWTO (R_PPC_GLOB_DAT,	/* 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_PPC_GLOB_DAT",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Marks a procedure linkage table entry for a symbol.  */
  HOWTO (R_PPC_JMP_SLOT,	/* 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_PPC_JMP_SLOT",	/* 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_PPC_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_PPC_RELATIVE",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_REL24, but uses the value of the symbol within the
     object rather than the final value.  Normally used for
     _GLOBAL_OFFSET_TABLE_.  FIXME: Not supported.  */
  HOWTO (R_PPC_LOCAL24PC,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_LOCAL24PC",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0x3fffffc,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* Like R_PPC_ADDR32, but may be unaligned.  */
  HOWTO (R_PPC_UADDR32,		/* 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_PPC_UADDR32",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_ADDR16, but may be unaligned.  */
  HOWTO (R_PPC_UADDR16,		/* 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_PPC_UADDR16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 32-bit PC relative */
  HOWTO (R_PPC_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_PPC_REL32",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 true),			/* pcrel_offset */

  /* 32-bit relocation to the symbol's procedure linkage table.
     FIXEME: not supported. */
  HOWTO (R_PPC_PLT32,		/* 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_PPC_PLT32",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 false),		/* pcrel_offset */

  /* 32-bit PC relative relocation to the symbol's procedure linkage table.
     FIXEME: not supported. */
  HOWTO (R_PPC_PLTREL32,	/* 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_PPC_PLTREL32",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 true),			/* pcrel_offset */

  /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
     the symbol.  */
  HOWTO (R_PPC_PLT16_LO,	/* 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_PPC_PLT16_LO",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
     the symbol.  */
  HOWTO (R_PPC_PLT16_HI,	/* type */
	 16,			/* 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_PPC_PLT16_HI",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		 /* pcrel_offset */

  /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
     the symbol.  FIXME: Not supported.	 */
  HOWTO (R_PPC_PLT16_HA,	/* 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_PPC_PLT16_HA",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
     small data items.  */
  HOWTO (R_PPC_SDAREL16,	/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_SDAREL16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 32-bit section relative relocation. */
  HOWTO (R_PPC_SECTOFF,		/* 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_PPC_SECTOFF",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 true),			/* pcrel_offset */

  /* 16-bit lower half section relative relocation. */
  HOWTO (R_PPC_SECTOFF_LO,	  /* 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_PPC_SECTOFF_LO",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 16-bit upper half section relative relocation. */
  HOWTO (R_PPC_SECTOFF_HI,	/* type */
	 16,			/* 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_PPC_SECTOFF_HI",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		 /* pcrel_offset */

  /* 16-bit upper half adjusted section relative relocation. */
  HOWTO (R_PPC_SECTOFF_HA,	/* 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_PPC_SECTOFF_HA",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* The remaining relocs are from the Embedded ELF ABI, and are not
     in the SVR4 ELF ABI.  */

  /* 32 bit value resulting from the addend minus the symbol */
  HOWTO (R_PPC_EMB_NADDR32,	/* 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_PPC_EMB_NADDR32",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffffffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 16 bit value resulting from the addend minus the symbol */
  HOWTO (R_PPC_EMB_NADDR16,	/* 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_PPC_EMB_NADDR16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 16 bit value resulting from the addend minus the symbol */
  HOWTO (R_PPC_EMB_NADDR16_LO,	/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont,/* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_ADDR16_LO",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* The high order 16 bits of the addend minus the symbol */
  HOWTO (R_PPC_EMB_NADDR16_HI,	/* type */
	 16,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_NADDR16_HI", /* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* The high order 16 bits of the result of the addend minus the address,
     plus 1 if the contents of the low 16 bits, treated as a signed number,
     is negative.  */
  HOWTO (R_PPC_EMB_NADDR16_HA,	/* type */
	 16,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_NADDR16_HA", /* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 16 bit value resulting from allocating a 4 byte word to hold an
     address in the .sdata section, and returning the offset from
     _SDA_BASE_ for that relocation */
  HOWTO (R_PPC_EMB_SDAI16,	/* 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_PPC_EMB_SDAI16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* 16 bit value resulting from allocating a 4 byte word to hold an
     address in the .sdata2 section, and returning the offset from
     _SDA2_BASE_ for that relocation */
  HOWTO (R_PPC_EMB_SDA2I16,	/* 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_PPC_EMB_SDA2I16",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
     small data items.	 */
  HOWTO (R_PPC_EMB_SDA2REL,	/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_SDA2REL",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
     signed offset from the appropriate base, and filling in the register
     field with the appropriate register (0, 2, or 13).  */
  HOWTO (R_PPC_EMB_SDA21,	/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_SDA21",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Relocation not handled: R_PPC_EMB_MRKREF */
  /* Relocation not handled: R_PPC_EMB_RELSEC16 */
  /* Relocation not handled: R_PPC_EMB_RELST_LO */
  /* Relocation not handled: R_PPC_EMB_RELST_HI */
  /* Relocation not handled: R_PPC_EMB_RELST_HA */
  /* Relocation not handled: R_PPC_EMB_BIT_FLD */

  /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
     in the 16 bit signed offset from the appropriate base, and filling in the
     register field with the appropriate register (0, 2, or 13).  */
  HOWTO (R_PPC_EMB_RELSDA,	/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 true,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_EMB_RELSDA",	/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */

  /* Phony reloc to handle AIX style TOC entries */
  HOWTO (R_PPC_TOC16,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 false,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 bfd_elf_generic_reloc,	/* special_function */
	 "R_PPC_TOC16",		/* name */
	 false,			/* partial_inplace */
	 0,			/* src_mask */
	 0xffff,		/* dst_mask */
	 false),		/* pcrel_offset */
};


/* Initialize the ppc_elf_howto_table, so that linear accesses can be done.  */

static void
ppc_elf_howto_init ()
{
  unsigned int i, type;

  for (i = 0; i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]); i++)
    {
      type = ppc_elf_howto_raw[i].type;
      BFD_ASSERT (type < sizeof(ppc_elf_howto_table) / sizeof(ppc_elf_howto_table[0]));
      ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
    }
}


static reloc_howto_type *
ppc_elf_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  enum ppc_reloc_type ppc_reloc = R_PPC_NONE;

  if (!ppc_elf_howto_table[ R_PPC_ADDR32 ])	/* Initialize howto table if needed */
    ppc_elf_howto_init ();

  switch ((int)code)
    {
    default:
      return (reloc_howto_type *)NULL;

    case BFD_RELOC_NONE:		ppc_reloc = R_PPC_NONE;			break;
    case BFD_RELOC_32:			ppc_reloc = R_PPC_ADDR32;		break;
    case BFD_RELOC_PPC_BA26:		ppc_reloc = R_PPC_ADDR24;		break;
    case BFD_RELOC_16:			ppc_reloc = R_PPC_ADDR16;		break;
    case BFD_RELOC_LO16:		ppc_reloc = R_PPC_ADDR16_LO;		break;
    case BFD_RELOC_HI16:		ppc_reloc = R_PPC_ADDR16_HI;		break;
    case BFD_RELOC_HI16_S:		ppc_reloc = R_PPC_ADDR16_HA;		break;
    case BFD_RELOC_PPC_BA16:		ppc_reloc = R_PPC_ADDR14;		break;
    case BFD_RELOC_PPC_BA16_BRTAKEN:	ppc_reloc = R_PPC_ADDR14_BRTAKEN;	break;
    case BFD_RELOC_PPC_BA16_BRNTAKEN:	ppc_reloc = R_PPC_ADDR14_BRNTAKEN;	break;
    case BFD_RELOC_PPC_B26:		ppc_reloc = R_PPC_REL24;		break;
    case BFD_RELOC_PPC_B16:		ppc_reloc = R_PPC_REL14;		break;
    case BFD_RELOC_PPC_B16_BRTAKEN:	ppc_reloc = R_PPC_REL14_BRTAKEN;	break;
    case BFD_RELOC_PPC_B16_BRNTAKEN:	ppc_reloc = R_PPC_REL14_BRNTAKEN;	break;
    case BFD_RELOC_16_GOTOFF:		ppc_reloc = R_PPC_GOT16;		break;
    case BFD_RELOC_LO16_GOTOFF:		ppc_reloc = R_PPC_GOT16_LO;		break;
    case BFD_RELOC_HI16_GOTOFF:		ppc_reloc = R_PPC_GOT16_HI;		break;
    case BFD_RELOC_HI16_S_GOTOFF:	ppc_reloc = R_PPC_GOT16_HA;		break;
    case BFD_RELOC_24_PLT_PCREL:	ppc_reloc = R_PPC_PLTREL24;		break;
    case BFD_RELOC_PPC_COPY:		ppc_reloc = R_PPC_COPY;			break;
    case BFD_RELOC_PPC_GLOB_DAT:	ppc_reloc = R_PPC_GLOB_DAT;		break;
    case BFD_RELOC_PPC_LOCAL24PC:	ppc_reloc = R_PPC_LOCAL24PC;		break;
    case BFD_RELOC_32_PCREL:		ppc_reloc = R_PPC_REL32;		break;
    case BFD_RELOC_32_PLTOFF:		ppc_reloc = R_PPC_PLT32;		break;
    case BFD_RELOC_32_PLT_PCREL:	ppc_reloc = R_PPC_PLTREL32;		break;
    case BFD_RELOC_LO16_PLTOFF:		ppc_reloc = R_PPC_PLT16_LO;		break;
    case BFD_RELOC_HI16_PLTOFF:		ppc_reloc = R_PPC_PLT16_HI;		break;
    case BFD_RELOC_HI16_S_PLTOFF:	ppc_reloc = R_PPC_PLT16_HA;		break;
    case BFD_RELOC_GPREL16:		ppc_reloc = R_PPC_SDAREL16;		break;
    case BFD_RELOC_32_BASEREL:		ppc_reloc = R_PPC_SECTOFF;		break;
    case BFD_RELOC_LO16_BASEREL:	ppc_reloc = R_PPC_SECTOFF_LO;		break;
    case BFD_RELOC_HI16_BASEREL:	ppc_reloc = R_PPC_SECTOFF_HI;		break;
    case BFD_RELOC_HI16_S_BASEREL:	ppc_reloc = R_PPC_SECTOFF_HA;		break;
    case BFD_RELOC_CTOR:		ppc_reloc = R_PPC_ADDR32;		break;
    case BFD_RELOC_PPC_TOC16:		ppc_reloc = R_PPC_TOC16;		break;
    case BFD_RELOC_PPC_EMB_NADDR32:	ppc_reloc = R_PPC_EMB_NADDR32;		break;
    case BFD_RELOC_PPC_EMB_NADDR16:	ppc_reloc = R_PPC_EMB_NADDR16;		break;
    case BFD_RELOC_PPC_EMB_NADDR16_LO:	ppc_reloc = R_PPC_EMB_NADDR16_LO;	break;
    case BFD_RELOC_PPC_EMB_NADDR16_HI:	ppc_reloc = R_PPC_EMB_NADDR16_HI;	break;
    case BFD_RELOC_PPC_EMB_NADDR16_HA:	ppc_reloc = R_PPC_EMB_NADDR16_HA;	break;
    case BFD_RELOC_PPC_EMB_SDAI16:	ppc_reloc = R_PPC_EMB_SDAI16;		break;
    case BFD_RELOC_PPC_EMB_SDA2I16:	ppc_reloc = R_PPC_EMB_SDA2I16;		break;
    case BFD_RELOC_PPC_EMB_SDA2REL:	ppc_reloc = R_PPC_EMB_SDA2REL;		break;
    case BFD_RELOC_PPC_EMB_SDA21:	ppc_reloc = R_PPC_EMB_SDA21;		break;
    case BFD_RELOC_PPC_EMB_MRKREF:	ppc_reloc = R_PPC_EMB_MRKREF;		break;
    case BFD_RELOC_PPC_EMB_RELSEC16:	ppc_reloc = R_PPC_EMB_RELSEC16;		break;
    case BFD_RELOC_PPC_EMB_RELST_LO:	ppc_reloc = R_PPC_EMB_RELST_LO;		break;
    case BFD_RELOC_PPC_EMB_RELST_HI:	ppc_reloc = R_PPC_EMB_RELST_HI;		break;
    case BFD_RELOC_PPC_EMB_RELST_HA:	ppc_reloc = R_PPC_EMB_RELST_HA;		break;
    case BFD_RELOC_PPC_EMB_BIT_FLD:	ppc_reloc = R_PPC_EMB_BIT_FLD;		break;
    case BFD_RELOC_PPC_EMB_RELSDA:	ppc_reloc = R_PPC_EMB_RELSDA;		break;
    }

  return ppc_elf_howto_table[ (int)ppc_reloc ];
};

/* Set the howto pointer for a PowerPC ELF reloc.  */

static void
ppc_elf_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf32_Internal_Rela *dst;
{
  if (!ppc_elf_howto_table[ R_PPC_ADDR32 ])	/* Initialize howto table if needed */
    ppc_elf_howto_init ();

  BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
  cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
}

/* Function to set whether a module needs the -mrelocatable bit set. */

static boolean
ppc_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
ppc_elf_copy_private_bfd_data (ibfd, obfd)
     bfd *ibfd;
     bfd *obfd;
{
  /* This function is selected based on the input vector.  We only
     want to copy information over if the output BFD also uses Elf
     format.  */
  if (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
ppc_elf_merge_private_bfd_data (ibfd, obfd)
     bfd *ibfd;
     bfd *obfd;
{
  flagword old_flags;
  flagword new_flags;
  boolean error;

  /* Check if we have the same endianess */
  if (ibfd->xvec->byteorder != obfd->xvec->byteorder
      && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
    {
      (*_bfd_error_handler)
	("%s: compiled for a %s endian system and target is %s endian",
	 bfd_get_filename (ibfd),
	 bfd_big_endian (ibfd) ? "big" : "little",
	 bfd_big_endian (obfd) ? "big" : "little");

      bfd_set_error (bfd_error_wrong_format);
      return false;
    }

  /* This function is selected based on the input vector.  We only
     want to copy information over if the output BFD also uses Elf
     format.  */
  if (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 */
    {
      /* Warn about -mrelocatable mismatch.  Allow -mrelocatable-lib to be linked
         with either.  */
      error = false;
      if ((new_flags & EF_PPC_RELOCATABLE) != 0
	  && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
	{
	  error = true;
	  (*_bfd_error_handler)
	    ("%s: compiled with -mrelocatable and linked with modules compiled normally",
	     bfd_get_filename (ibfd));
	}
      else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
	       && (old_flags & EF_PPC_RELOCATABLE) != 0)
	{
	  error = true;
	  (*_bfd_error_handler)
	    ("%s: compiled normally and linked with modules compiled with -mrelocatable",
	     bfd_get_filename (ibfd));
	}
      else if ((new_flags & EF_PPC_RELOCATABLE_LIB) != 0)
	elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE_LIB;


      /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if any module uses it */
      elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);

      new_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
      old_flags &= ~ (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);

      /* Warn about any other mismatches */
      if (new_flags != old_flags)
	{
	  error = true;
	  (*_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);
	}

      if (error)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return false;
	}
    }

  return true;
}


/* Handle a PowerPC specific section when reading an object file.  This
   is called when elfcode.h finds a section with an unknown type.  */

static boolean
ppc_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.  */

boolean
ppc_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;
}


/* Create a special linker section */
static elf_linker_section_t *
ppc_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;
      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_GOT:	/* .got section */
	  defaults.name		   = ".got";
	  defaults.rel_name	   = ".rela.got";
	  defaults.sym_name	   = "_GLOBAL_OFFSET_TABLE_";
	  defaults.max_hole_offset = 32764;
	  defaults.hole_size	   = 16;
	  defaults.sym_offset	   = 4;
	  break;

	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;
	  break;
	}

      lsect = _bfd_elf_create_linker_section (abfd, info, which, &defaults);
    }

  return lsect;
}


/* 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.  */

static boolean
ppc_elf_adjust_dynamic_symbol (info, h)
     struct bfd_link_info *info;
     struct elf_link_hash_entry *h;
{
#ifdef DEBUG
  fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called\n");
#endif
  return true;
}


/* Increment the index of a dynamic symbol by a given amount.  Called
   via elf_link_hash_traverse.  */

static boolean
ppc_elf_adjust_dynindx (h, cparg)
     struct elf_link_hash_entry *h;
     PTR cparg;
{
  int *cp = (int *) cparg;

#ifdef DEBUG
  fprintf (stderr, "ppc_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.  */

static boolean
ppc_elf_size_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  bfd *dynobj;
  asection *s;
  boolean reltext;
  boolean relplt;

#ifdef DEBUG
  fprintf (stderr, "ppc_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;
	}

      /* Make space for the trailing nop in .plt.  */
      s = bfd_get_section_by_name (dynobj, ".plt");
      BFD_ASSERT (s != NULL);
      if (s->_raw_size > 0)
	s->_raw_size += 4;
    }
  else
    {
      /* We may have created entries in the .rela.got, .rela.sdata, and
	 .rela.sdata2 section2.  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.sdata", (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.  */
  reltext = false;
  relplt = false;
  for (s = dynobj->sections; s != NULL; s = s->next)
    {
      const char *name;
      boolean strip;

      if ((s->flags & SEC_IN_MEMORY) == 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 0
      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 to handle .rela.bss and
		 .rel.plt.  We must create it in
		 create_dynamic_sections, because it 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;

	      /* If this relocation section applies to a read only
		 section, then we probably need a DT_TEXTREL entry.  */
	      target = bfd_get_section_by_name (output_bfd, name + 5);
	      if (target != NULL
		  && (target->flags & SEC_READONLY) != 0)
		reltext = true;

	      if (strcmp (name, ".rela.plt") == 0)
		relplt = 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
#endif
	if (strcmp (name, ".plt") != 0
	    && strcmp (name, ".got") != 0
	    && strcmp (name, ".sdata") != 0
	    && strcmp (name, ".sdata2") != 0
	    && strcmp (name, ".rela.sdata") != 0
	    && strcmp (name, ".rela.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 ppc_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 (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0))
	return false;

      if (relplt)
	{
	  if (! 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 (! 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.  */
  if (info->shared)
    {
      int c, i;

      c = bfd_count_sections (output_bfd);
      elf_link_hash_traverse (elf_hash_table (info),
			      ppc_elf_adjust_dynindx,
			      (PTR) &c);
      elf_hash_table (info)->dynsymcount += c;

      for (i = 1, s = output_bfd->sections; s != NULL; s = s->next, i++)
	{
	  elf_section_data (s)->dynindx = i;
	  /* These symbols will have no names, so we don't need to
             fiddle with dynstr_index.  */
	}
    }

  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.  */

static boolean
ppc_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;
  elf_linker_section_t *got;
  elf_linker_section_t *sdata;
  elf_linker_section_t *sdata2;
  asection *sreloc;

  if (info->relocateable)
    return true;

#ifdef DEBUG
  fprintf (stderr, "ppc_elf_check_relocs called for section %s\n",
	   bfd_get_section_name (abfd, sec));
#endif

  /* Create the linker generated sections all the time so that the special
     symbols are created.  */
  if ((got = elf_linker_section (abfd, LINKER_SECTION_GOT)) == NULL)
    {
      got = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_GOT);
      if (!got)
	return false;
    }

  if ((sdata = elf_linker_section (abfd, LINKER_SECTION_SDATA)) == NULL)
    {
      sdata = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA);
      if (!sdata)
	return false;
    }


  if ((sdata2 = elf_linker_section (abfd, LINKER_SECTION_SDATA2)) == NULL)
    {
      sdata2 = ppc_elf_create_linker_section (abfd, info, LINKER_SECTION_SDATA2);
      if (!sdata2)
	return false;
    }

  dynobj = elf_hash_table (info)->dynobj;
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (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];

      switch (ELF32_R_TYPE (rel->r_info))
	{
	default:
	  break;

	/* GOT16 relocations */
	case R_PPC_GOT16:
	case R_PPC_GOT16_LO:
	case R_PPC_GOT16_HI:
	case R_PPC_GOT16_HA:
	  if (got->rel_section == NULL
	      && (h != NULL || info->shared)
	      && !_bfd_elf_make_linker_section_rela (dynobj, got, 2))
	    return false;

	  if (!bfd_elf32_create_pointer_linker_section (abfd, info, got, h, rel))
	    return false;

	  break;

	/* Indirect .sdata relocation */
	case R_PPC_EMB_SDAI16:
	  if (got->rel_section == NULL
	      && (h != NULL || info->shared)
	      && !_bfd_elf_make_linker_section_rela (dynobj, got, 2))
	    return false;

	  if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata, h, rel))
	    return false;

	  break;

	/* Indirect .sdata2 relocation */
	case R_PPC_EMB_SDA2I16:
	  if (got->rel_section == NULL
	      && (h != NULL || info->shared)
	      && !_bfd_elf_make_linker_section_rela (dynobj, got, 2))
	    return false;

	  if (!bfd_elf32_create_pointer_linker_section (abfd, info, sdata2, h, rel))
	    return false;

	  break;

#if 0
	case R_PPC_PLT32:
	case R_PPC_PLTREL24:
	case R_PPC_PLT16_LO:
	case R_PPC_PLT16_HI:
	case R_PPC_PLT16_HA:
#ifdef DEBUG
	  fprintf (stderr, "Reloc requires a PLT entry\n");
#endif
	  /* This symbol requires a procedure linkage table entry.  We
             actually build the entry in adjust_dynamic_symbol,
             because this might be a case of linking PIC code without
             linking in any dynamic objects, in which case we don't
             need to generate a procedure linkage table after all.  */

	  if (h == NULL)
	    {
	      /* It does not make sense to have a procedure linkage
                 table entry for a local symbol.  */
	      bfd_set_error (bfd_error_bad_value);
	      return false;
	    }

	  /* Make sure this symbol is output as a dynamic symbol.  */
	  if (h->dynindx == -1)
	    {
	      if (! bfd_elf32_link_record_dynamic_symbol (info, h))
		return false;
	    }

	  h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
	  break;

	case R_SPARC_PC10:
	case R_SPARC_PC22:
	  if (h != NULL
	      && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
	    break;
	  /* Fall through.  */
	case R_SPARC_DISP8:
	case R_SPARC_DISP16:
	case R_SPARC_DISP32:
	case R_SPARC_WDISP30:
	case R_SPARC_WDISP22:
	  if (h == NULL)
	    break;
	  /* Fall through.  */
	case R_SPARC_8:
	case R_SPARC_16:
	case R_SPARC_32:
	case R_SPARC_HI22:
	case R_SPARC_22:
	case R_SPARC_13:
	case R_SPARC_LO10:
	case R_SPARC_UA32:
	  if (info->shared
	      && (sec->flags & SEC_ALLOC) != 0)
	    {
	      /* When creating a shared object, we must copy these
                 relocs into the output file.  We create a reloc
                 section in dynobj and make room for the reloc.  */
	      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)
		    {
		      sreloc = bfd_make_section (dynobj, name);
		      if (sreloc == NULL
			  || ! bfd_set_section_flags (dynobj, sreloc,
						      (SEC_ALLOC
						       | SEC_LOAD
						       | SEC_HAS_CONTENTS
						       | SEC_IN_MEMORY
						       | SEC_READONLY))
			  || ! bfd_set_section_alignment (dynobj, sreloc, 2))
			return false;
		    }
		}

	      sreloc->_raw_size += sizeof (Elf32_External_Rela);
	    }

	  break;
#endif
	}
    }

  return true;
}


/* Hook called by the linker routine which adds symbols from an object
   file.  We use it to put .comm items in .sbss, and not .bss.  */

/*ARGSUSED*/
static boolean
ppc_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
     bfd *abfd;
     struct bfd_link_info *info;
     const Elf_Internal_Sym *sym;
     const char **namep;
     flagword *flagsp;
     asection **secp;
     bfd_vma *valp;
{
  if (sym->st_shndx == SHN_COMMON && sym->st_size <= bfd_get_gp_size (abfd))
    {
      /* Common symbols less than or equal to -G nn bytes are automatically
	 put into .sdata.  */
      bfd *dynobj = elf_hash_table (info)->dynobj;
      elf_linker_section_t *sdata = elf_linker_section (dynobj, LINKER_SECTION_SDATA);
      if (!sdata->bss_section)
	sdata->bss_section = bfd_make_section (dynobj, sdata->bss_name);
      *secp = sdata->bss_section;
      (*secp)->flags |= SEC_IS_COMMON;
      *valp = sym->st_size;
    }

  return true;
}


/* Finish up dynamic symbol handling.  We set the contents of various
   dynamic sections here.  */

static boolean
ppc_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
     bfd *output_bfd;
     struct bfd_link_info *info;
     struct elf_link_hash_entry *h;
     Elf_Internal_Sym *sym;
{
  bfd *dynobj;

#ifdef DEBUG
  fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s\n", h->root.root.string);
#endif

  dynobj = elf_hash_table (info)->dynobj;
  BFD_ASSERT (dynobj != NULL);

  if (h->plt_offset != (bfd_vma) -1)
    {
      asection *splt;
      asection *srela;
      Elf_Internal_Rela rela;

      /* This symbol has an entry in the procedure linkage table.  Set
         it up.  */

      BFD_ASSERT (h->dynindx != -1);

      splt = bfd_get_section_by_name (dynobj, ".plt");
      srela = bfd_get_section_by_name (dynobj, ".rela.plt");
      BFD_ASSERT (splt != NULL && srela != NULL);

      /* Fill in the entry in the procedure linkage table.  */
#if 0
      bfd_put_32 (output_bfd,
		  PLT_ENTRY_WORD0 + h->plt_offset,
		  splt->contents + h->plt_offset);
      bfd_put_32 (output_bfd,
		  (PLT_ENTRY_WORD1
		   + (((- (h->plt_offset + 4)) >> 2) & 0x3fffff)),
		  splt->contents + h->plt_offset + 4);
      bfd_put_32 (output_bfd, PLT_ENTRY_WORD2,
		  splt->contents + h->plt_offset + 8);

      /* Fill in the entry in the .rela.plt section.  */
      rela.r_offset = (splt->output_section->vma
		       + splt->output_offset
		       + h->plt_offset);
      rela.r_info = ELF32_R_INFO (h->dynindx, R_SPARC_JMP_SLOT);
      rela.r_addend = 0;
      bfd_elf32_swap_reloca_out (output_bfd, &rela,
				 ((Elf32_External_Rela *) srela->contents
				  + h->plt_offset / PLT_ENTRY_SIZE - 4));
#endif

      if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
	{
	  /* Mark the symbol as undefined, rather than as defined in
	     the .plt section.  Leave the value alone.  */
	  sym->st_shndx = SHN_UNDEF;
	}
    }

  if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
    {
      asection *s;
      Elf_Internal_Rela rela;

      /* This symbols needs a copy reloc.  Set it up.  */

      BFD_ASSERT (h->dynindx != -1);

      s = bfd_get_section_by_name (h->root.u.def.section->owner,
				   ".rela.bss");
      BFD_ASSERT (s != NULL);

      rela.r_offset = (h->root.u.def.value
		       + h->root.u.def.section->output_section->vma
		       + h->root.u.def.section->output_offset);
      rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
      rela.r_addend = 0;
      bfd_elf32_swap_reloca_out (output_bfd, &rela,
				 ((Elf32_External_Rela *) s->contents
				  + s->reloc_count));
      ++s->reloc_count;
    }

  /* Mark some specially defined symbols as absolute.  */
  if (strcmp (h->root.root.string, "_DYNAMIC") == 0
      || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
      || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
    sym->st_shndx = SHN_ABS;

  return true;
}


/* Finish up the dynamic sections.  */

static boolean
ppc_elf_finish_dynamic_sections (output_bfd, info)
     bfd *output_bfd;
     struct bfd_link_info *info;
{
  asection *sdyn;
  bfd *dynobj = elf_hash_table (info)->dynobj;
  elf_linker_section_t *got = elf_linker_section (dynobj, LINKER_SECTION_GOT);

#ifdef DEBUG
  fprintf (stderr, "ppc_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_.  */
  if (got)
    {
      unsigned char *contents = got->section->contents + got->hole_offset;
      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 (got->section->output_section)->this_hdr.sh_entsize = 4;
    }

  if (info->shared)
    {
      asection *sdynsym;
      asection *s;
      Elf_Internal_Sym sym;

      /* 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;

	  sym.st_value = s->vma;

	  indx = elf_section_data (s)->this_idx;
	  BFD_ASSERT (indx > 0);
	  sym.st_shndx = indx;

	  bfd_elf32_swap_symbol_out (output_bfd, &sym,
				     (PTR) (((Elf32_External_Sym *)
					     sdynsym->contents)
					    + elf_section_data (s)->dynindx));
	}

      /* 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 =
	bfd_count_sections (output_bfd) + 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
ppc_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_linker_section_t *got		  = elf_linker_section (dynobj, LINKER_SECTION_GOT);
  elf_linker_section_t *sdata		  = elf_linker_section (dynobj, LINKER_SECTION_SDATA);
  elf_linker_section_t *sdata2		  = elf_linker_section (dynobj, LINKER_SECTION_SDATA2);
  Elf_Internal_Rela *rel		  = relocs;
  Elf_Internal_Rela *relend		  = relocs + input_section->reloc_count;
  boolean ret				  = true;
  long insn;

#ifdef DEBUG
  fprintf (stderr, "ppc_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 (!ppc_elf_howto_table[ R_PPC_ADDR32 ])	/* Initialize howto table if needed */
    ppc_elf_howto_init ();

  for (; rel < relend; rel++)
    {
      enum ppc_reloc_type r_type	= (enum ppc_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_PPC_max || !ppc_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 = ppc_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;
	      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 need no special processing */
	case (int)R_PPC_NONE:
	case (int)R_PPC_ADDR32:
	case (int)R_PPC_ADDR24:
	case (int)R_PPC_ADDR16:
	case (int)R_PPC_ADDR16_LO:
	case (int)R_PPC_ADDR16_HI:
	case (int)R_PPC_ADDR14:
	case (int)R_PPC_REL24:
	case (int)R_PPC_REL14:
	case (int)R_PPC_UADDR32:
	case (int)R_PPC_UADDR16:
	case (int)R_PPC_REL32:
	  break;

	/* branch taken prediction relocations */
	case (int)R_PPC_ADDR14_BRTAKEN:
	case (int)R_PPC_REL14_BRTAKEN:
	  insn = bfd_get_32 (output_bfd, contents + offset);
	  if ((relocation - offset) & 0x8000)
	    insn &= ~BRANCH_PREDICT_BIT;
	  else
	    insn |= BRANCH_PREDICT_BIT;
	  bfd_put_32 (output_bfd, insn, contents + offset);
	  break;

	/* branch not taken predicition relocations */
	case (int)R_PPC_ADDR14_BRNTAKEN:
	case (int)R_PPC_REL14_BRNTAKEN:
	  insn = bfd_get_32 (output_bfd, contents + offset);
	  if ((relocation - offset) & 0x8000)
	    insn |= BRANCH_PREDICT_BIT;
	  else
	    insn &= ~BRANCH_PREDICT_BIT;
	  bfd_put_32 (output_bfd, insn, contents + offset);
	  break;

	/* GOT16 relocations */
	case (int)R_PPC_GOT16:
	case (int)R_PPC_GOT16_LO:
	case (int)R_PPC_GOT16_HI:
	case (int)R_PPC_GOT16_HA:
	  relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
								got, h, relocation, rel,
								R_PPC_RELATIVE);
	  break;

	/* Indirect .sdata relocation */
	case (int)R_PPC_EMB_SDAI16:
	  BFD_ASSERT (sdata != NULL);
	  relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
								sdata, h, relocation, rel,
								R_PPC_RELATIVE);
	  break;

	/* Indirect .sdata2 relocation */
	case (int)R_PPC_EMB_SDA2I16:
	  BFD_ASSERT (sdata2 != NULL);
	  relocation = bfd_elf32_finish_pointer_linker_section (output_bfd, input_bfd, info,
								sdata2, h, relocation, rel,
								R_PPC_RELATIVE);
	  break;

	/* Handle the TOC16 reloc.  We want to use the offset within the .got
	   section, not the actual VMA.  This is appropriate when generating
	   an embedded ELF object, for which the .got section acts like the
	   AIX .toc section.  */
	case (int)R_PPC_TOC16:			/* phony GOT16 relocations */
	  BFD_ASSERT (sec != (asection *)0);
	  BFD_ASSERT (bfd_is_und_section (sec)
		      || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
		      || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)

	  addend -= sec->output_section->vma + sec->output_offset + 0x8000;
	  break;

	/* arithmetic adjust relocations */
	case (int)R_PPC_ADDR16_HA:
	  BFD_ASSERT (sec != (asection *)0);
	  addend += ((relocation + addend) & 0x8000) << 1;
	  break;

	/* relocate against _SDA_BASE_ */
	case (int)R_PPC_SDAREL16:
	  BFD_ASSERT (sec != (asection *)0);
	  if (strcmp (bfd_get_section_name (abfd, sec), ".sdata") != 0
	      && strcmp (bfd_get_section_name (abfd, sec), ".sbss") != 0)
	    {
	      (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
				     bfd_get_filename (input_bfd),
				     sym_name,
				     ppc_elf_howto_table[ (int)r_type ]->name,
				     bfd_get_section_name (abfd, sec));

	      bfd_set_error (bfd_error_bad_value);
	      ret = false;
	      continue;
	    }
	  addend -= (sdata->sym_hash->root.u.def.value
		     + sdata->sym_hash->root.u.def.section->output_section->vma
		     + sdata->sym_hash->root.u.def.section->output_offset);
	  break;


	/* relocate against _SDA2_BASE_ */
	case (int)R_PPC_EMB_SDA2REL:
	  BFD_ASSERT (sec != (asection *)0);
	  if (strcmp (bfd_get_section_name (abfd, sec), ".sdata2") != 0
	      && strcmp (bfd_get_section_name (abfd, sec), ".sbss2") != 0)
	    {
	      (*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
				     bfd_get_filename (input_bfd),
				     sym_name,
				     ppc_elf_howto_table[ (int)r_type ]->name,
				     bfd_get_section_name (abfd, sec));

	      bfd_set_error (bfd_error_bad_value);
	      ret = false;
	      continue;
	    }
	  addend -= (sdata2->sym_hash->root.u.def.value
		     + sdata2->sym_hash->root.u.def.section->output_section->vma
		     + sdata2->sym_hash->root.u.def.section->output_offset);
	  break;


	/* relocate against either _SDA_BASE_, _SDA2_BASE_, or 0 */
	case (int)R_PPC_EMB_SDA21:
	case (int)R_PPC_EMB_RELSDA:
	  {
	    const char *name = bfd_get_section_name (abfd, sec);
	    int reg;

	    BFD_ASSERT (sec != (asection *)0);
	    if (strcmp (name, ".sdata") == 0 || strcmp (name, ".sbss") == 0)
	      {
		reg = 13;
		addend -= (sdata->sym_hash->root.u.def.value
			   + sdata->sym_hash->root.u.def.section->output_section->vma
			   + sdata->sym_hash->root.u.def.section->output_offset);
	      }

	    else if (strcmp (name, ".sdata2") == 0 || strcmp (name, ".sbss2") == 0)
	      {
		reg = 2;
		addend -= (sdata2->sym_hash->root.u.def.value
			   + sdata2->sym_hash->root.u.def.section->output_section->vma
			   + sdata2->sym_hash->root.u.def.section->output_offset);
	      }

	    else if (strcmp (name, ".PPC.EMB.sdata0") == 0 || strcmp (name, ".PPC.EMB.sbss0") == 0)
	      {
		reg = 0;
	      }

	    else
	      {
		(*_bfd_error_handler) ("%s: The target (%s) of a %s relocation is in the wrong section (%s)",
				       bfd_get_filename (input_bfd),
				       sym_name,
				       ppc_elf_howto_table[ (int)r_type ]->name,
				       bfd_get_section_name (abfd, sec));

		bfd_set_error (bfd_error_bad_value);
		ret = false;
		continue;
	      }

	    if (r_type == R_PPC_EMB_SDA21)
	      {			/* fill in register field */
		insn = bfd_get_32 (output_bfd, contents + offset);
		insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
		bfd_put_32 (output_bfd, insn, contents + offset);
	      }
	  }
	  break;

	/* Relocate against the beginning of the section */
	case (int)R_PPC_SECTOFF:
	case (int)R_PPC_SECTOFF_LO:
	case (int)R_PPC_SECTOFF_HI:
	  BFD_ASSERT (sec != (asection *)0);
	  addend -= sec->output_section->vma;
	  break;

	case (int)R_PPC_SECTOFF_HA:
	  BFD_ASSERT (sec != (asection *)0);
	  addend -= sec->output_section->vma;
	  addend += ((relocation + addend) & 0x8000) << 1;
	  break;

	/* Negative relocations */
	case (int)R_PPC_EMB_NADDR32:
	case (int)R_PPC_EMB_NADDR16:
	case (int)R_PPC_EMB_NADDR16_LO:
	case (int)R_PPC_EMB_NADDR16_HI:
	  addend -= 2*relocation;
	  break;

	case (int)R_PPC_EMB_NADDR16_HA:
	  addend -= 2*relocation;
	  addend += ((relocation + addend) & 0x8000) << 1;
	  break;

	/* NOP relocation that prevents garbage collecting linkers from omitting a
	   reference.  */
	case (int)R_PPC_EMB_MRKREF:
	  continue;

	case (int)R_PPC_PLTREL24:
	case (int)R_PPC_COPY:
	case (int)R_PPC_GLOB_DAT:
	case (int)R_PPC_JMP_SLOT:
	case (int)R_PPC_RELATIVE:
	case (int)R_PPC_LOCAL24PC:
	case (int)R_PPC_PLT32:
	case (int)R_PPC_PLTREL32:
	case (int)R_PPC_PLT16_LO:
	case (int)R_PPC_PLT16_HI:
	case (int)R_PPC_PLT16_HA:
	case (int)R_PPC_EMB_RELSEC16:
	case (int)R_PPC_EMB_RELST_LO:
	case (int)R_PPC_EMB_RELST_HI:
	case (int)R_PPC_EMB_RELST_HA:
	case (int)R_PPC_EMB_BIT_FLD:
	  (*_bfd_error_handler) ("%s: Relocation %s is not yet supported for symbol %s.",
				 bfd_get_filename (input_bfd),
				 ppc_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;
}


#define TARGET_LITTLE_SYM	bfd_elf32_powerpcle_vec
#define TARGET_LITTLE_NAME	"elf32-powerpcle"
#define TARGET_BIG_SYM		bfd_elf32_powerpc_vec
#define TARGET_BIG_NAME		"elf32-powerpc"
#define ELF_ARCH		bfd_arch_powerpc
#define ELF_MACHINE_CODE	EM_PPC
#define ELF_MAXPAGESIZE		0x10000
#define elf_info_to_howto	ppc_elf_info_to_howto

#ifdef  EM_CYGNUS_POWERPC
#define ELF_MACHINE_ALT1	EM_CYGNUS_POWERPC
#endif

#ifdef EM_PPC_OLD
#define ELF_MACHINE_ALT2	EM_PPC_OLD
#endif

#define bfd_elf32_bfd_copy_private_bfd_data	ppc_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data	ppc_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags		ppc_elf_set_private_flags
#define bfd_elf32_bfd_reloc_type_lookup		ppc_elf_reloc_type_lookup
#define elf_backend_section_from_shdr		ppc_elf_section_from_shdr
#define elf_backend_relocate_section		ppc_elf_relocate_section
#define elf_backend_create_dynamic_sections	_bfd_elf_create_dynamic_sections
#define elf_backend_check_relocs		ppc_elf_check_relocs
#define elf_backend_adjust_dynamic_symbol	ppc_elf_adjust_dynamic_symbol
#define elf_backend_add_symbol_hook		ppc_elf_add_symbol_hook
#define elf_backend_size_dynamic_sections	ppc_elf_size_dynamic_sections
#define elf_backend_finish_dynamic_symbol	ppc_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections	ppc_elf_finish_dynamic_sections
#define elf_backend_fake_sections		ppc_elf_fake_sections

#include "elf32-target.h"