/mingw-w64-v2.0.999/binutils/src/bfd/coff-rs6000.c

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/* BFD back-end for IBM RS/6000 "XCOFF" files.
   Copyright 1990-1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   2008, 2009, 2010, 2011, 2012
   Free Software Foundation, Inc.
   Written by Metin G. Ozisik, Mimi Phuong-Thao Vo, and John Gilmore.
   Archive support from Damon A. Permezel.
   Contributed by IBM Corporation and 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "coff/internal.h"
#include "coff/xcoff.h"
#include "coff/rs6000.h"
#include "libcoff.h"
#include "libxcoff.h"

extern bfd_boolean _bfd_xcoff_mkobject (bfd *);
extern bfd_boolean _bfd_xcoff_copy_private_bfd_data (bfd *, bfd *);
extern bfd_boolean _bfd_xcoff_is_local_label_name (bfd *, const char *);
extern reloc_howto_type *_bfd_xcoff_reloc_type_lookup
  (bfd *, bfd_reloc_code_real_type);
extern bfd_boolean _bfd_xcoff_slurp_armap (bfd *);
extern const bfd_target *_bfd_xcoff_archive_p (bfd *);
extern void * _bfd_xcoff_read_ar_hdr (bfd *);
extern bfd *_bfd_xcoff_openr_next_archived_file (bfd *, bfd *);
extern int _bfd_xcoff_stat_arch_elt (bfd *, struct stat *);
extern bfd_boolean _bfd_xcoff_write_armap
  (bfd *, unsigned int, struct orl *, unsigned int, int);
extern bfd_boolean _bfd_xcoff_write_archive_contents (bfd *);
extern int _bfd_xcoff_sizeof_headers (bfd *, struct bfd_link_info *);
extern void _bfd_xcoff_swap_sym_in (bfd *, void *, void *);
extern unsigned int _bfd_xcoff_swap_sym_out (bfd *, void *, void *);
extern void _bfd_xcoff_swap_aux_in (bfd *, void *, int, int, int, int, void *);
extern unsigned int _bfd_xcoff_swap_aux_out
  (bfd *, void *, int, int, int, int, void *);
static void xcoff_swap_reloc_in (bfd *, void *, void *);
static unsigned int xcoff_swap_reloc_out (bfd *, void *, void *);

/* Forward declare xcoff_rtype2howto for coffcode.h macro.  */
void xcoff_rtype2howto (arelent *, struct internal_reloc *);

/* coffcode.h needs these to be defined.  */
#define RS6000COFF_C 1

#define SELECT_RELOC(internal, howto)					\
  {									\
    internal.r_type = howto->type;					\
    internal.r_size =							\
      ((howto->complain_on_overflow == complain_overflow_signed		\
	? 0x80								\
	: 0)								\
       | (howto->bitsize - 1));						\
  }

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
#define COFF_LONG_FILENAMES
#define NO_COFF_SYMBOLS
#define RTYPE2HOWTO(cache_ptr, dst) xcoff_rtype2howto (cache_ptr, dst)
#define coff_mkobject _bfd_xcoff_mkobject
#define coff_bfd_copy_private_bfd_data _bfd_xcoff_copy_private_bfd_data
#define coff_bfd_is_local_label_name _bfd_xcoff_is_local_label_name
#define coff_bfd_reloc_type_lookup _bfd_xcoff_reloc_type_lookup
#define coff_bfd_reloc_name_lookup _bfd_xcoff_reloc_name_lookup
#ifdef AIX_CORE
extern const bfd_target * rs6000coff_core_p (bfd *abfd);
extern bfd_boolean rs6000coff_core_file_matches_executable_p
  (bfd *cbfd, bfd *ebfd);
extern char *rs6000coff_core_file_failing_command (bfd *abfd);
extern int rs6000coff_core_file_failing_signal (bfd *abfd);
#define CORE_FILE_P rs6000coff_core_p
#define coff_core_file_failing_command \
  rs6000coff_core_file_failing_command
#define coff_core_file_failing_signal \
  rs6000coff_core_file_failing_signal
#define coff_core_file_matches_executable_p \
  rs6000coff_core_file_matches_executable_p
#define coff_core_file_pid \
  _bfd_nocore_core_file_pid
#else
#define CORE_FILE_P _bfd_dummy_target
#define coff_core_file_failing_command \
  _bfd_nocore_core_file_failing_command
#define coff_core_file_failing_signal \
  _bfd_nocore_core_file_failing_signal
#define coff_core_file_matches_executable_p \
  _bfd_nocore_core_file_matches_executable_p
#define coff_core_file_pid \
  _bfd_nocore_core_file_pid
#endif
#define coff_SWAP_sym_in _bfd_xcoff_swap_sym_in
#define coff_SWAP_sym_out _bfd_xcoff_swap_sym_out
#define coff_SWAP_aux_in _bfd_xcoff_swap_aux_in
#define coff_SWAP_aux_out _bfd_xcoff_swap_aux_out
#define coff_swap_reloc_in xcoff_swap_reloc_in
#define coff_swap_reloc_out xcoff_swap_reloc_out
#define NO_COFF_RELOCS

#ifndef bfd_pe_print_pdata
#define bfd_pe_print_pdata	NULL
#endif

#include "coffcode.h"

/* The main body of code is in coffcode.h.  */

static const char *normalize_filename (bfd *);
static bfd_boolean xcoff_write_armap_old
  (bfd *, unsigned int, struct orl *, unsigned int, int);
static bfd_boolean xcoff_write_armap_big
  (bfd *, unsigned int, struct orl *, unsigned int, int);
static bfd_boolean xcoff_write_archive_contents_old (bfd *);
static bfd_boolean xcoff_write_archive_contents_big (bfd *);
static void xcoff_swap_ldhdr_in (bfd *, const void *, struct internal_ldhdr *);
static void xcoff_swap_ldhdr_out (bfd *, const struct internal_ldhdr *, void *);
static void xcoff_swap_ldsym_in (bfd *, const void *, struct internal_ldsym *);
static void xcoff_swap_ldsym_out (bfd *, const struct internal_ldsym *, void *);
static void xcoff_swap_ldrel_in (bfd *, const void *, struct internal_ldrel *);
static void xcoff_swap_ldrel_out (bfd *, const struct internal_ldrel *, void *);
static bfd_boolean xcoff_ppc_relocate_section
  (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
   struct internal_reloc *, struct internal_syment *, asection **);
static bfd_boolean _bfd_xcoff_put_ldsymbol_name
  (bfd *, struct xcoff_loader_info *, struct internal_ldsym *, const char *);
static asection *xcoff_create_csect_from_smclas
  (bfd *, union internal_auxent *, const char *);
static bfd_boolean xcoff_is_lineno_count_overflow (bfd *, bfd_vma);
static bfd_boolean xcoff_is_reloc_count_overflow (bfd *, bfd_vma);
static bfd_vma xcoff_loader_symbol_offset (bfd *, struct internal_ldhdr *);
static bfd_vma xcoff_loader_reloc_offset (bfd *, struct internal_ldhdr *);
static bfd_boolean xcoff_generate_rtinit
  (bfd *, const char *, const char *, bfd_boolean);
static bfd_boolean do_pad (bfd *, unsigned int);
static bfd_boolean do_copy (bfd *, bfd *);

/* Relocation functions */
static bfd_boolean xcoff_reloc_type_br (XCOFF_RELOC_FUNCTION_ARGS);

static bfd_boolean xcoff_complain_overflow_dont_func
  (XCOFF_COMPLAIN_FUNCTION_ARGS);
static bfd_boolean xcoff_complain_overflow_bitfield_func
  (XCOFF_COMPLAIN_FUNCTION_ARGS);
static bfd_boolean xcoff_complain_overflow_signed_func
  (XCOFF_COMPLAIN_FUNCTION_ARGS);
static bfd_boolean xcoff_complain_overflow_unsigned_func
  (XCOFF_COMPLAIN_FUNCTION_ARGS);

bfd_boolean (*xcoff_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION])
  (XCOFF_RELOC_FUNCTION_ARGS) =
{
  xcoff_reloc_type_pos,	 /* R_POS   (0x00) */
  xcoff_reloc_type_neg,	 /* R_NEG   (0x01) */
  xcoff_reloc_type_rel,	 /* R_REL   (0x02) */
  xcoff_reloc_type_toc,	 /* R_TOC   (0x03) */
  xcoff_reloc_type_fail, /* R_RTB   (0x04) */
  xcoff_reloc_type_toc,	 /* R_GL    (0x05) */
  xcoff_reloc_type_toc,	 /* R_TCL   (0x06) */
  xcoff_reloc_type_fail, /*	    (0x07) */
  xcoff_reloc_type_ba,	 /* R_BA    (0x08) */
  xcoff_reloc_type_fail, /*	    (0x09) */
  xcoff_reloc_type_br,	 /* R_BR    (0x0a) */
  xcoff_reloc_type_fail, /*	    (0x0b) */
  xcoff_reloc_type_pos,	 /* R_RL    (0x0c) */
  xcoff_reloc_type_pos,	 /* R_RLA   (0x0d) */
  xcoff_reloc_type_fail, /*	    (0x0e) */
  xcoff_reloc_type_noop, /* R_REF   (0x0f) */
  xcoff_reloc_type_fail, /*	    (0x10) */
  xcoff_reloc_type_fail, /*	    (0x11) */
  xcoff_reloc_type_toc,	 /* R_TRL   (0x12) */
  xcoff_reloc_type_toc,	 /* R_TRLA  (0x13) */
  xcoff_reloc_type_fail, /* R_RRTBI (0x14) */
  xcoff_reloc_type_fail, /* R_RRTBA (0x15) */
  xcoff_reloc_type_ba,	 /* R_CAI   (0x16) */
  xcoff_reloc_type_crel, /* R_CREL  (0x17) */
  xcoff_reloc_type_ba,	 /* R_RBA   (0x18) */
  xcoff_reloc_type_ba,	 /* R_RBAC  (0x19) */
  xcoff_reloc_type_br,	 /* R_RBR   (0x1a) */
  xcoff_reloc_type_ba,	 /* R_RBRC  (0x1b) */
};

bfd_boolean (*xcoff_complain_overflow[XCOFF_MAX_COMPLAIN_OVERFLOW])
  (XCOFF_COMPLAIN_FUNCTION_ARGS) =
{
  xcoff_complain_overflow_dont_func,
  xcoff_complain_overflow_bitfield_func,
  xcoff_complain_overflow_signed_func,
  xcoff_complain_overflow_unsigned_func,
};

/* Information about one member of an archive.  */
struct member_layout {
  /* The archive member that this structure describes.  */
  bfd *member;

  /* The number of bytes of padding that must be inserted before the
     start of the member in order to ensure that the section contents
     are correctly aligned.  */
  unsigned int leading_padding;

  /* The offset of MEMBER from the start of the archive (i.e. the end
     of the leading padding).  */
  file_ptr offset;

  /* The normalized name of MEMBER.  */
  const char *name;

  /* The length of NAME, without padding.  */
  bfd_size_type namlen;

  /* The length of NAME, with padding.  */
  bfd_size_type padded_namlen;

  /* The size of MEMBER's header, including the name and magic sequence.  */
  bfd_size_type header_size;

  /* The size of the MEMBER's contents.  */
  bfd_size_type contents_size;

  /* The number of bytes of padding that must be inserted after MEMBER
     in order to preserve even alignment.  */
  bfd_size_type trailing_padding;
};

/* A structure used for iterating over the members of an archive.  */
struct archive_iterator {
  /* The archive itself.  */
  bfd *archive;

  /* Information about the current archive member.  */
  struct member_layout current;

  /* Information about the next archive member.  MEMBER is null if there
     are no more archive members, in which case OFFSET is the offset of
     the first unused byte.  */
  struct member_layout next;
};

/* Initialize INFO so that it describes member MEMBER of archive ARCHIVE.
   OFFSET is the even-padded offset of MEMBER, not including any leading
   padding needed for section alignment.  */

static void
member_layout_init (struct member_layout *info, bfd *archive,
		    bfd *member, file_ptr offset)
{
  info->member = member;
  info->leading_padding = 0;
  if (member)
    {
      info->name = normalize_filename (member);
      info->namlen = strlen (info->name);
      info->padded_namlen = info->namlen + (info->namlen & 1);
      if (xcoff_big_format_p (archive))
	info->header_size = SIZEOF_AR_HDR_BIG;
      else
	info->header_size = SIZEOF_AR_HDR;
      info->header_size += info->padded_namlen + SXCOFFARFMAG;
      info->contents_size = arelt_size (member);
      info->trailing_padding = info->contents_size & 1;

      if (bfd_check_format (member, bfd_object)
	  && bfd_get_flavour (member) == bfd_target_xcoff_flavour
	  && (member->flags & DYNAMIC) != 0)
	info->leading_padding
	  = (-(offset + info->header_size)
	     & ((1 << bfd_xcoff_text_align_power (member)) - 1));
    }
  info->offset = offset + info->leading_padding;
}

/* Set up ITERATOR to iterate through archive ARCHIVE.  */

static void
archive_iterator_begin (struct archive_iterator *iterator,
			bfd *archive)
{
  iterator->archive = archive;
  member_layout_init (&iterator->next, archive, archive->archive_head,
		      xcoff_big_format_p (archive)
		      ? SIZEOF_AR_FILE_HDR_BIG
		      : SIZEOF_AR_FILE_HDR);
}

/* Make ITERATOR visit the first unvisited archive member.  Return true
   on success; return false if all members have been visited.  */

static bfd_boolean
archive_iterator_next (struct archive_iterator *iterator)
{
  if (!iterator->next.member)
    return FALSE;

  iterator->current = iterator->next;
  member_layout_init (&iterator->next, iterator->archive,
		      iterator->current.member->archive_next,
		      iterator->current.offset
		      + iterator->current.header_size
		      + iterator->current.contents_size
		      + iterator->current.trailing_padding);
  return TRUE;
}

/* We use our own tdata type.  Its first field is the COFF tdata type,
   so the COFF routines are compatible.  */

bfd_boolean
_bfd_xcoff_mkobject (bfd *abfd)
{
  coff_data_type *coff;
  bfd_size_type amt = sizeof (struct xcoff_tdata);

  abfd->tdata.xcoff_obj_data = (struct xcoff_tdata *) bfd_zalloc (abfd, amt);
  if (abfd->tdata.xcoff_obj_data == NULL)
    return FALSE;
  coff = coff_data (abfd);
  coff->symbols = (coff_symbol_type *) NULL;
  coff->conversion_table = (unsigned int *) NULL;
  coff->raw_syments = (struct coff_ptr_struct *) NULL;
  coff->relocbase = 0;

  xcoff_data (abfd)->modtype = ('1' << 8) | 'L';

  /* We set cputype to -1 to indicate that it has not been
     initialized.  */
  xcoff_data (abfd)->cputype = -1;

  xcoff_data (abfd)->csects = NULL;
  xcoff_data (abfd)->debug_indices = NULL;

  /* text section alignment is different than the default */
  bfd_xcoff_text_align_power (abfd) = 2;

  return TRUE;
}

/* Copy XCOFF data from one BFD to another.  */

bfd_boolean
_bfd_xcoff_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
{
  struct xcoff_tdata *ix, *ox;
  asection *sec;

  if (ibfd->xvec != obfd->xvec)
    return TRUE;
  ix = xcoff_data (ibfd);
  ox = xcoff_data (obfd);
  ox->full_aouthdr = ix->full_aouthdr;
  ox->toc = ix->toc;
  if (ix->sntoc == 0)
    ox->sntoc = 0;
  else
    {
      sec = coff_section_from_bfd_index (ibfd, ix->sntoc);
      if (sec == NULL)
	ox->sntoc = 0;
      else
	ox->sntoc = sec->output_section->target_index;
    }
  if (ix->snentry == 0)
    ox->snentry = 0;
  else
    {
      sec = coff_section_from_bfd_index (ibfd, ix->snentry);
      if (sec == NULL)
	ox->snentry = 0;
      else
	ox->snentry = sec->output_section->target_index;
    }
  bfd_xcoff_text_align_power (obfd) = bfd_xcoff_text_align_power (ibfd);
  bfd_xcoff_data_align_power (obfd) = bfd_xcoff_data_align_power (ibfd);
  ox->modtype = ix->modtype;
  ox->cputype = ix->cputype;
  ox->maxdata = ix->maxdata;
  ox->maxstack = ix->maxstack;
  return TRUE;
}

/* I don't think XCOFF really has a notion of local labels based on
   name.  This will mean that ld -X doesn't actually strip anything.
   The AIX native linker does not have a -X option, and it ignores the
   -x option.  */

bfd_boolean
_bfd_xcoff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
                                const char *name ATTRIBUTE_UNUSED)
{
  return FALSE;
}

static const struct dwarf_debug_section xcoff_debug_sections[] =
{
  { ".dwabrev",		NULL },
  { ".dwarnge",		NULL },
  { NULL,	NULL }, /* .debug_frame */
  { ".dwinfo",		NULL },
  { ".dwline",		NULL },
  { NULL,	NULL }, /* .debug_loc */
  { NULL,	NULL }, /* .debug_macinfo */
  { NULL,	NULL }, /* .debug_macro */
  { ".dwpbnms",		NULL },
  { ".dwpbtyp",		NULL },
  { ".dwrnges",		NULL },
  { NULL,	NULL }, /* .debug_static_func */
  { NULL,	NULL }, /* .debug_static_vars */
  { ".dwstr",	NULL },
  { NULL,	NULL }, /* .debug_types */
  /* GNU DWARF 1 extensions */
  { NULL,	NULL }, /* .debug_sfnames */
  { NULL,	NULL }, /* .debug_srcinfo */
  /* SGI/MIPS DWARF 2 extensions */
  { NULL,	NULL }, /* .debug_funcnames */
  { NULL,	NULL }, /* .debug_typenames */
  { NULL,	NULL }, /* .debug_varnames */
  { NULL,	NULL }, /* .debug_weaknames */
  { NULL,	NULL },
};

static bfd_boolean
xcoff_find_nearest_line (bfd *abfd,
                         asection *section,
                         asymbol **symbols,
                         bfd_vma offset,
                         const char **filename_ptr,
                         const char **functionname_ptr,
                         unsigned int *line_ptr)
{
  return coff_find_nearest_line_with_names (abfd, xcoff_debug_sections,
                                            section, symbols, offset,
                                            filename_ptr, functionname_ptr,
                                            line_ptr);
}


void
_bfd_xcoff_swap_sym_in (bfd *abfd, void * ext1, void * in1)
{
  SYMENT *ext = (SYMENT *)ext1;
  struct internal_syment * in = (struct internal_syment *)in1;

  if (ext->e.e_name[0] != 0)
    {
      memcpy (in->_n._n_name, ext->e.e_name, SYMNMLEN);
    }
  else
    {
      in->_n._n_n._n_zeroes = 0;
      in->_n._n_n._n_offset = H_GET_32 (abfd, ext->e.e.e_offset);
    }

  in->n_value = H_GET_32 (abfd, ext->e_value);
  in->n_scnum = H_GET_16 (abfd, ext->e_scnum);
  in->n_type = H_GET_16 (abfd, ext->e_type);
  in->n_sclass = H_GET_8 (abfd, ext->e_sclass);
  in->n_numaux = H_GET_8 (abfd, ext->e_numaux);
}

unsigned int
_bfd_xcoff_swap_sym_out (bfd *abfd, void * inp, void * extp)
{
  struct internal_syment *in = (struct internal_syment *)inp;
  SYMENT *ext =(SYMENT *)extp;

  if (in->_n._n_name[0] != 0)
    {
      memcpy (ext->e.e_name, in->_n._n_name, SYMNMLEN);
    }
  else
    {
      H_PUT_32 (abfd, 0, ext->e.e.e_zeroes);
      H_PUT_32 (abfd, in->_n._n_n._n_offset, ext->e.e.e_offset);
    }

  H_PUT_32 (abfd, in->n_value, ext->e_value);
  H_PUT_16 (abfd, in->n_scnum, ext->e_scnum);
  H_PUT_16 (abfd, in->n_type, ext->e_type);
  H_PUT_8 (abfd, in->n_sclass, ext->e_sclass);
  H_PUT_8 (abfd, in->n_numaux, ext->e_numaux);
  return bfd_coff_symesz (abfd);
}

void
_bfd_xcoff_swap_aux_in (bfd *abfd, void * ext1, int type, int in_class,
                        int indx, int numaux, void * in1)
{
  AUXENT * ext = (AUXENT *)ext1;
  union internal_auxent *in = (union internal_auxent *)in1;

  switch (in_class)
    {
    case C_FILE:
      if (ext->x_file.x_n.x_fname[0] == 0)
	{
	  in->x_file.x_n.x_zeroes = 0;
	  in->x_file.x_n.x_offset =
	    H_GET_32 (abfd, ext->x_file.x_n.x_n.x_offset);
	}
      else
	{
	  if (numaux > 1)
	    {
	      if (indx == 0)
		memcpy (in->x_file.x_fname, ext->x_file.x_n.x_fname,
			numaux * sizeof (AUXENT));
	    }
	  else
	    {
	      memcpy (in->x_file.x_fname, ext->x_file.x_n.x_fname, FILNMLEN);
	    }
	}
      goto end;

      /* RS/6000 "csect" auxents */
    case C_EXT:
    case C_AIX_WEAKEXT:
    case C_HIDEXT:
      if (indx + 1 == numaux)
	{
	  in->x_csect.x_scnlen.l = H_GET_32 (abfd, ext->x_csect.x_scnlen);
	  in->x_csect.x_parmhash = H_GET_32 (abfd, ext->x_csect.x_parmhash);
	  in->x_csect.x_snhash   = H_GET_16 (abfd, ext->x_csect.x_snhash);
	  /* We don't have to hack bitfields in x_smtyp because it's
	     defined by shifts-and-ands, which are equivalent on all
	     byte orders.  */
	  in->x_csect.x_smtyp    = H_GET_8 (abfd, ext->x_csect.x_smtyp);
	  in->x_csect.x_smclas   = H_GET_8 (abfd, ext->x_csect.x_smclas);
	  in->x_csect.x_stab     = H_GET_32 (abfd, ext->x_csect.x_stab);
	  in->x_csect.x_snstab   = H_GET_16 (abfd, ext->x_csect.x_snstab);
	  goto end;
	}
      break;

    case C_STAT:
    case C_LEAFSTAT:
    case C_HIDDEN:
      if (type == T_NULL)
	{
	  in->x_scn.x_scnlen = H_GET_32 (abfd, ext->x_scn.x_scnlen);
	  in->x_scn.x_nreloc = H_GET_16 (abfd, ext->x_scn.x_nreloc);
	  in->x_scn.x_nlinno = H_GET_16 (abfd, ext->x_scn.x_nlinno);
	  /* PE defines some extra fields; we zero them out for
	     safety.  */
	  in->x_scn.x_checksum = 0;
	  in->x_scn.x_associated = 0;
	  in->x_scn.x_comdat = 0;

	  goto end;
	}
      break;
    }

  in->x_sym.x_tagndx.l = H_GET_32 (abfd, ext->x_sym.x_tagndx);
  in->x_sym.x_tvndx = H_GET_16 (abfd, ext->x_sym.x_tvndx);

  if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
      || ISTAG (in_class))
    {
      in->x_sym.x_fcnary.x_fcn.x_lnnoptr =
	H_GET_32 (abfd, ext->x_sym.x_fcnary.x_fcn.x_lnnoptr);
      in->x_sym.x_fcnary.x_fcn.x_endndx.l =
	H_GET_32 (abfd, ext->x_sym.x_fcnary.x_fcn.x_endndx);
    }
  else
    {
      in->x_sym.x_fcnary.x_ary.x_dimen[0] =
	H_GET_16 (abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[0]);
      in->x_sym.x_fcnary.x_ary.x_dimen[1] =
	H_GET_16 (abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[1]);
      in->x_sym.x_fcnary.x_ary.x_dimen[2] =
	H_GET_16 (abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[2]);
      in->x_sym.x_fcnary.x_ary.x_dimen[3] =
	H_GET_16 (abfd, ext->x_sym.x_fcnary.x_ary.x_dimen[3]);
    }

  if (ISFCN (type))
    {
      in->x_sym.x_misc.x_fsize = H_GET_32 (abfd, ext->x_sym.x_misc.x_fsize);
    }
  else
    {
      in->x_sym.x_misc.x_lnsz.x_lnno =
	H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_lnno);
      in->x_sym.x_misc.x_lnsz.x_size =
	H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size);
    }

 end: ;
  /* The semicolon is because MSVC doesn't like labels at
     end of block.  */
}

unsigned int
_bfd_xcoff_swap_aux_out (bfd *abfd, void * inp, int type, int in_class,
                         int indx ATTRIBUTE_UNUSED,
                         int numaux ATTRIBUTE_UNUSED,
                         void * extp)
{
  union internal_auxent *in = (union internal_auxent *)inp;
  AUXENT *ext = (AUXENT *)extp;

  memset (ext, 0, bfd_coff_auxesz (abfd));
  switch (in_class)
    {
    case C_FILE:
      if (in->x_file.x_fname[0] == 0)
	{
	  H_PUT_32 (abfd, 0, ext->x_file.x_n.x_n.x_zeroes);
	  H_PUT_32 (abfd, in->x_file.x_n.x_offset,
                    ext->x_file.x_n.x_n.x_offset);
	}
      else
	{
	  memcpy (ext->x_file.x_n.x_fname, in->x_file.x_fname, FILNMLEN);
	}
      goto end;

      /* RS/6000 "csect" auxents */
    case C_EXT:
    case C_AIX_WEAKEXT:
    case C_HIDEXT:
      if (indx + 1 == numaux)
	{
	  H_PUT_32 (abfd, in->x_csect.x_scnlen.l, ext->x_csect.x_scnlen);
	  H_PUT_32 (abfd, in->x_csect.x_parmhash, ext->x_csect.x_parmhash);
	  H_PUT_16 (abfd, in->x_csect.x_snhash, ext->x_csect.x_snhash);
	  /* We don't have to hack bitfields in x_smtyp because it's
	     defined by shifts-and-ands, which are equivalent on all
	     byte orders.  */
	  H_PUT_8 (abfd, in->x_csect.x_smtyp, ext->x_csect.x_smtyp);
	  H_PUT_8 (abfd, in->x_csect.x_smclas, ext->x_csect.x_smclas);
	  H_PUT_32 (abfd, in->x_csect.x_stab, ext->x_csect.x_stab);
	  H_PUT_16 (abfd, in->x_csect.x_snstab, ext->x_csect.x_snstab);
	  goto end;
	}
      break;

    case C_STAT:
    case C_LEAFSTAT:
    case C_HIDDEN:
      if (type == T_NULL)
	{
	  H_PUT_32 (abfd, in->x_scn.x_scnlen, ext->x_scn.x_scnlen);
	  H_PUT_16 (abfd, in->x_scn.x_nreloc, ext->x_scn.x_nreloc);
	  H_PUT_16 (abfd, in->x_scn.x_nlinno, ext->x_scn.x_nlinno);
	  goto end;
	}
      break;
    }

  H_PUT_32 (abfd, in->x_sym.x_tagndx.l, ext->x_sym.x_tagndx);
  H_PUT_16 (abfd, in->x_sym.x_tvndx, ext->x_sym.x_tvndx);

  if (in_class == C_BLOCK || in_class == C_FCN || ISFCN (type)
      || ISTAG (in_class))
    {
      H_PUT_32 (abfd, in->x_sym.x_fcnary.x_fcn.x_lnnoptr,
		ext->x_sym.x_fcnary.x_fcn.x_lnnoptr);
      H_PUT_32 (abfd, in->x_sym.x_fcnary.x_fcn.x_endndx.l,
		ext->x_sym.x_fcnary.x_fcn.x_endndx);
    }
  else
    {
      H_PUT_16 (abfd, in->x_sym.x_fcnary.x_ary.x_dimen[0],
		ext->x_sym.x_fcnary.x_ary.x_dimen[0]);
      H_PUT_16 (abfd, in->x_sym.x_fcnary.x_ary.x_dimen[1],
		ext->x_sym.x_fcnary.x_ary.x_dimen[1]);
      H_PUT_16 (abfd, in->x_sym.x_fcnary.x_ary.x_dimen[2],
		ext->x_sym.x_fcnary.x_ary.x_dimen[2]);
      H_PUT_16 (abfd, in->x_sym.x_fcnary.x_ary.x_dimen[3],
		ext->x_sym.x_fcnary.x_ary.x_dimen[3]);
    }

  if (ISFCN (type))
    H_PUT_32 (abfd, in->x_sym.x_misc.x_fsize, ext->x_sym.x_misc.x_fsize);
  else
    {
      H_PUT_16 (abfd, in->x_sym.x_misc.x_lnsz.x_lnno,
		ext->x_sym.x_misc.x_lnsz.x_lnno);
      H_PUT_16 (abfd, in->x_sym.x_misc.x_lnsz.x_size,
		ext->x_sym.x_misc.x_lnsz.x_size);
    }

end:
  return bfd_coff_auxesz (abfd);
}



/* The XCOFF reloc table.  Actually, XCOFF relocations specify the
   bitsize and whether they are signed or not, along with a
   conventional type.  This table is for the types, which are used for
   different algorithms for putting in the reloc.  Many of these
   relocs need special_function entries, which I have not written.  */


reloc_howto_type xcoff_howto_table[] =
{
  /* Standard 32 bit relocation.  */
  HOWTO (R_POS,			/* 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 */
	 "R_POS",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 32 bit relocation, but store negative value.  */
  HOWTO (R_NEG,			/* 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 */
	 "R_NEG",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 32 bit PC relative relocation.  */
  HOWTO (R_REL,			/* 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 */
	 "R_REL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 16 bit TOC relative relocation.  */
  HOWTO (R_TOC,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_TOC",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* I don't really know what this is.  */
  HOWTO (R_RTB,			/* type */
	 1,			/* 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 */
	 "R_RTB",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* External TOC relative symbol.  */
  HOWTO (R_GL,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_GL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Local TOC relative symbol.	 */
  HOWTO (R_TCL,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_TCL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  EMPTY_HOWTO (7),

  /* Non modifiable absolute branch.  */
  HOWTO (R_BA,			/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_BA_26",		/* name */
	 TRUE,			/* partial_inplace */
	 0x03fffffc,		/* src_mask */
	 0x03fffffc,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  EMPTY_HOWTO (9),

  /* Non modifiable relative branch.  */
  HOWTO (R_BR,			/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 TRUE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_BR",		/* name */
	 TRUE,			/* partial_inplace */
	 0x03fffffc,		/* src_mask */
	 0x03fffffc,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  EMPTY_HOWTO (0xb),

  /* Indirect load.  */
  HOWTO (R_RL,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Load address.  */
  HOWTO (R_RLA,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RLA",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  EMPTY_HOWTO (0xe),

  /* Non-relocating reference.  Bitsize is 1 so that r_rsize is 0.  */
  HOWTO (R_REF,			/* type */
	 0,			/* rightshift */
	 0,			/* size (0 = byte, 1 = short, 2 = long) */
	 1,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_dont, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_REF",		/* name */
	 FALSE,			/* partial_inplace */
	 0,			/* src_mask */
	 0,			/* dst_mask */
	 FALSE),		/* pcrel_offset */

  EMPTY_HOWTO (0x10),
  EMPTY_HOWTO (0x11),

  /* TOC relative indirect load.  */
  HOWTO (R_TRL,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_TRL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* TOC relative load address.  */
  HOWTO (R_TRLA,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_TRLA",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable relative branch.  */
  HOWTO (R_RRTBI,		 /* type */
	 1,			/* 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 */
	 "R_RRTBI",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable absolute branch.  */
  HOWTO (R_RRTBA,		 /* type */
	 1,			/* 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 */
	 "R_RRTBA",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable call absolute indirect.  */
  HOWTO (R_CAI,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_CAI",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable call relative.  */
  HOWTO (R_CREL,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_CREL",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch absolute.  */
  HOWTO (R_RBA,			/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RBA",		/* name */
	 TRUE,			/* partial_inplace */
	 0x03fffffc,		/* src_mask */
	 0x03fffffc,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch absolute.  */
  HOWTO (R_RBAC,		/* 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 */
	 "R_RBAC",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffffffff,		/* src_mask */
	 0xffffffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch relative.  */
  HOWTO (R_RBR,			/* type */
	 0,			/* rightshift */
	 2,			/* size (0 = byte, 1 = short, 2 = long) */
	 26,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RBR_26",		/* name */
	 TRUE,			/* partial_inplace */
	 0x03fffffc,		/* src_mask */
	 0x03fffffc,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch absolute.  */
  HOWTO (R_RBRC,		/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RBRC",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* 16 bit Non modifiable absolute branch.  */
  HOWTO (R_BA,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_bitfield, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_BA_16",		/* name */
	 TRUE,			/* partial_inplace */
	 0xfffc,		/* src_mask */
	 0xfffc,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch relative.  */
  HOWTO (R_RBR,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RBR_16",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

  /* Modifiable branch relative.  */
  HOWTO (R_RBA,			/* type */
	 0,			/* rightshift */
	 1,			/* size (0 = byte, 1 = short, 2 = long) */
	 16,			/* bitsize */
	 FALSE,			/* pc_relative */
	 0,			/* bitpos */
	 complain_overflow_signed, /* complain_on_overflow */
	 0,			/* special_function */
	 "R_RBA_16",		/* name */
	 TRUE,			/* partial_inplace */
	 0xffff,		/* src_mask */
	 0xffff,		/* dst_mask */
	 FALSE),		/* pcrel_offset */

};

void
xcoff_rtype2howto (arelent *relent, struct internal_reloc *internal)
{
  if (internal->r_type > R_RBRC)
    abort ();

  /* Default howto layout works most of the time */
  relent->howto = &xcoff_howto_table[internal->r_type];

  /* Special case some 16 bit reloc */
  if (15 == (internal->r_size & 0x1f))
    {
      if (R_BA == internal->r_type)
	relent->howto = &xcoff_howto_table[0x1c];
      else if (R_RBR == internal->r_type)
	relent->howto = &xcoff_howto_table[0x1d];
      else if (R_RBA == internal->r_type)
	relent->howto = &xcoff_howto_table[0x1e];
    }

  /* The r_size field of an XCOFF reloc encodes the bitsize of the
     relocation, as well as indicating whether it is signed or not.
     Doublecheck that the relocation information gathered from the
     type matches this information.  The bitsize is not significant
     for R_REF relocs.  */
  if (relent->howto->dst_mask != 0
      && (relent->howto->bitsize
	  != ((unsigned int) internal->r_size & 0x1f) + 1))
    abort ();
}

reloc_howto_type *
_bfd_xcoff_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
                              bfd_reloc_code_real_type code)
{
  switch (code)
    {
    case BFD_RELOC_PPC_B26:
      return &xcoff_howto_table[0xa];
    case BFD_RELOC_PPC_BA16:
      return &xcoff_howto_table[0x1c];
    case BFD_RELOC_PPC_BA26:
      return &xcoff_howto_table[8];
    case BFD_RELOC_PPC_TOC16:
      return &xcoff_howto_table[3];
    case BFD_RELOC_32:
    case BFD_RELOC_CTOR:
      return &xcoff_howto_table[0];
    case BFD_RELOC_NONE:
      return &xcoff_howto_table[0xf];
    default:
      return NULL;
    }
}

static reloc_howto_type *
_bfd_xcoff_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
			      const char *r_name)
{
  unsigned int i;

  for (i = 0;
       i < sizeof (xcoff_howto_table) / sizeof (xcoff_howto_table[0]);
       i++)
    if (xcoff_howto_table[i].name != NULL
	&& strcasecmp (xcoff_howto_table[i].name, r_name) == 0)
      return &xcoff_howto_table[i];

  return NULL;
}

/* XCOFF archive support.  The original version of this code was by
   Damon A. Permezel.  It was enhanced to permit cross support, and
   writing archive files, by Ian Lance Taylor, Cygnus Support.

   XCOFF uses its own archive format.  Everything is hooked together
   with file offset links, so it is possible to rapidly update an
   archive in place.  Of course, we don't do that.  An XCOFF archive
   has a real file header, not just an ARMAG string.  The structure of
   the file header and of each archive header appear below.

   An XCOFF archive also has a member table, which is a list of
   elements in the archive (you can get that by looking through the
   linked list, but you have to read a lot more of the file).  The
   member table has a normal archive header with an empty name.  It is
   normally (and perhaps must be) the second to last entry in the
   archive.  The member table data is almost printable ASCII.  It
   starts with a 12 character decimal string which is the number of
   entries in the table.  For each entry it has a 12 character decimal
   string which is the offset in the archive of that member.  These
   entries are followed by a series of null terminated strings which
   are the member names for each entry.

   Finally, an XCOFF archive has a global symbol table, which is what
   we call the armap.  The global symbol table has a normal archive
   header with an empty name.  It is normally (and perhaps must be)
   the last entry in the archive.  The contents start with a four byte
   binary number which is the number of entries.  This is followed by
   a that many four byte binary numbers; each is the file offset of an
   entry in the archive.  These numbers are followed by a series of
   null terminated strings, which are symbol names.

   AIX 4.3 introduced a new archive format which can handle larger
   files and also 32- and 64-bit objects in the same archive.  The
   things said above remain true except that there is now more than
   one global symbol table.  The one is used to index 32-bit objects,
   the other for 64-bit objects.

   The new archives (recognizable by the new ARMAG string) has larger
   field lengths so that we cannot really share any code.  Also we have
   to take care that we are not generating the new form of archives
   on AIX 4.2 or earlier systems.  */

/* XCOFF archives use this as a magic string.  Note that both strings
   have the same length.  */

/* Set the magic for archive.  */

bfd_boolean
bfd_xcoff_ar_archive_set_magic (bfd *abfd ATTRIBUTE_UNUSED,
                                char *magic ATTRIBUTE_UNUSED)
{
  /* Not supported yet.  */
  return FALSE;
 /* bfd_xcoff_archive_set_magic (abfd, magic); */
}

/* Read in the armap of an XCOFF archive.  */

bfd_boolean
_bfd_xcoff_slurp_armap (bfd *abfd)
{
  file_ptr off;
  size_t namlen;
  bfd_size_type sz;
  bfd_byte *contents, *cend;
  bfd_vma c, i;
  carsym *arsym;
  bfd_byte *p;

  if (xcoff_ardata (abfd) == NULL)
    {
      bfd_has_map (abfd) = FALSE;
      return TRUE;
    }

  if (! xcoff_big_format_p (abfd))
    {
      /* This is for the old format.  */
      struct xcoff_ar_hdr hdr;

      off = strtol (xcoff_ardata (abfd)->symoff, (char **) NULL, 10);
      if (off == 0)
	{
	  bfd_has_map (abfd) = FALSE;
	  return TRUE;
	}

      if (bfd_seek (abfd, off, SEEK_SET) != 0)
	return FALSE;

      /* The symbol table starts with a normal archive header.  */
      if (bfd_bread (&hdr, (bfd_size_type) SIZEOF_AR_HDR, abfd)
	  != SIZEOF_AR_HDR)
	return FALSE;

      /* Skip the name (normally empty).  */
      namlen = strtol (hdr.namlen, (char **) NULL, 10);
      off = ((namlen + 1) & ~ (size_t) 1) + SXCOFFARFMAG;
      if (bfd_seek (abfd, off, SEEK_CUR) != 0)
	return FALSE;

      sz = strtol (hdr.size, (char **) NULL, 10);

      /* Read in the entire symbol table.  */
      contents = (bfd_byte *) bfd_alloc (abfd, sz);
      if (contents == NULL)
	return FALSE;
      if (bfd_bread (contents, sz, abfd) != sz)
	return FALSE;

      /* The symbol table starts with a four byte count.  */
      c = H_GET_32 (abfd, contents);

      if (c * 4 >= sz)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return FALSE;
	}

      bfd_ardata (abfd)->symdefs =
	((carsym *) bfd_alloc (abfd, c * sizeof (carsym)));
      if (bfd_ardata (abfd)->symdefs == NULL)
	return FALSE;

      /* After the count comes a list of four byte file offsets.  */
      for (i = 0, arsym = bfd_ardata (abfd)->symdefs, p = contents + 4;
	   i < c;
	   ++i, ++arsym, p += 4)
	arsym->file_offset = H_GET_32 (abfd, p);
    }
  else
    {
      /* This is for the new format.  */
      struct xcoff_ar_hdr_big hdr;

      off = strtol (xcoff_ardata_big (abfd)->symoff, (char **) NULL, 10);
      if (off == 0)
	{
	  bfd_has_map (abfd) = FALSE;
	  return TRUE;
	}

      if (bfd_seek (abfd, off, SEEK_SET) != 0)
	return FALSE;

      /* The symbol table starts with a normal archive header.  */
      if (bfd_bread (&hdr, (bfd_size_type) SIZEOF_AR_HDR_BIG, abfd)
	  != SIZEOF_AR_HDR_BIG)
	return FALSE;

      /* Skip the name (normally empty).  */
      namlen = strtol (hdr.namlen, (char **) NULL, 10);
      off = ((namlen + 1) & ~ (size_t) 1) + SXCOFFARFMAG;
      if (bfd_seek (abfd, off, SEEK_CUR) != 0)
	return FALSE;

      /* XXX This actually has to be a call to strtoll (at least on 32-bit
	 machines) since the field width is 20 and there numbers with more
	 than 32 bits can be represented.  */
      sz = strtol (hdr.size, (char **) NULL, 10);

      /* Read in the entire symbol table.  */
      contents = (bfd_byte *) bfd_alloc (abfd, sz);
      if (contents == NULL)
	return FALSE;
      if (bfd_bread (contents, sz, abfd) != sz)
	return FALSE;

      /* The symbol table starts with an eight byte count.  */
      c = H_GET_64 (abfd, contents);

      if (c * 8 >= sz)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return FALSE;
	}

      bfd_ardata (abfd)->symdefs =
	((carsym *) bfd_alloc (abfd, c * sizeof (carsym)));
      if (bfd_ardata (abfd)->symdefs == NULL)
	return FALSE;

      /* After the count comes a list of eight byte file offsets.  */
      for (i = 0, arsym = bfd_ardata (abfd)->symdefs, p = contents + 8;
	   i < c;
	   ++i, ++arsym, p += 8)
	arsym->file_offset = H_GET_64 (abfd, p);
    }

  /* After the file offsets come null terminated symbol names.  */
  cend = contents + sz;
  for (i = 0, arsym = bfd_ardata (abfd)->symdefs;
       i < c;
       ++i, ++arsym, p += strlen ((char *) p) + 1)
    {
      if (p >= cend)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return FALSE;
	}
      arsym->name = (char *) p;
    }

  bfd_ardata (abfd)->symdef_count = c;
  bfd_has_map (abfd) = TRUE;

  return TRUE;
}

/* See if this is an XCOFF archive.  */

const bfd_target *
_bfd_xcoff_archive_p (bfd *abfd)
{
  struct artdata *tdata_hold;
  char magic[SXCOFFARMAG];
  bfd_size_type amt = SXCOFFARMAG;

  if (bfd_bread (magic, amt, abfd) != amt)
    {
      if (bfd_get_error () != bfd_error_system_call)
	bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (strncmp (magic, XCOFFARMAG, SXCOFFARMAG) != 0
      && strncmp (magic, XCOFFARMAGBIG, SXCOFFARMAG) != 0)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  tdata_hold = bfd_ardata (abfd);

  amt = sizeof (struct artdata);
  bfd_ardata (abfd) = (struct artdata *) bfd_zalloc (abfd, amt);
  if (bfd_ardata (abfd) == (struct artdata *) NULL)
    goto error_ret_restore;

  /* Cleared by bfd_zalloc above.
     bfd_ardata (abfd)->cache = NULL;
     bfd_ardata (abfd)->archive_head = NULL;
     bfd_ardata (abfd)->symdefs = NULL;
     bfd_ardata (abfd)->extended_names = NULL;
     bfd_ardata (abfd)->extended_names_size = 0;  */

  /* Now handle the two formats.  */
  if (magic[1] != 'b')
    {
      /* This is the old format.  */
      struct xcoff_ar_file_hdr hdr;

      /* Copy over the magic string.  */
      memcpy (hdr.magic, magic, SXCOFFARMAG);

      /* Now read the rest of the file header.  */
      amt = SIZEOF_AR_FILE_HDR - SXCOFFARMAG;
      if (bfd_bread (&hdr.memoff, amt, abfd) != amt)
	{
	  if (bfd_get_error () != bfd_error_system_call)
	    bfd_set_error (bfd_error_wrong_format);
	  goto error_ret;
	}

      bfd_ardata (abfd)->first_file_filepos = strtol (hdr.firstmemoff,
						      (char **) NULL, 10);

      amt = SIZEOF_AR_FILE_HDR;
      bfd_ardata (abfd)->tdata = bfd_zalloc (abfd, amt);
      if (bfd_ardata (abfd)->tdata == NULL)
	goto error_ret;

      memcpy (bfd_ardata (abfd)->tdata, &hdr, SIZEOF_AR_FILE_HDR);
    }
  else
    {
      /* This is the new format.  */
      struct xcoff_ar_file_hdr_big hdr;

      /* Copy over the magic string.  */
      memcpy (hdr.magic, magic, SXCOFFARMAG);

      /* Now read the rest of the file header.  */
      amt = SIZEOF_AR_FILE_HDR_BIG - SXCOFFARMAG;
      if (bfd_bread (&hdr.memoff, amt, abfd) != amt)
	{
	  if (bfd_get_error () != bfd_error_system_call)
	    bfd_set_error (bfd_error_wrong_format);
	  goto error_ret;
	}

      bfd_ardata (abfd)->first_file_filepos = bfd_scan_vma (hdr.firstmemoff,
							    (const char **) 0,
							    10);

      amt = SIZEOF_AR_FILE_HDR_BIG;
      bfd_ardata (abfd)->tdata = bfd_zalloc (abfd, amt);
      if (bfd_ardata (abfd)->tdata == NULL)
	goto error_ret;

      memcpy (bfd_ardata (abfd)->tdata, &hdr, SIZEOF_AR_FILE_HDR_BIG);
    }

  if (! _bfd_xcoff_slurp_armap (abfd))
    {
    error_ret:
      bfd_release (abfd, bfd_ardata (abfd));
    error_ret_restore:
      bfd_ardata (abfd) = tdata_hold;
      return NULL;
    }

  return abfd->xvec;
}

/* Read the archive header in an XCOFF archive.  */

void *
_bfd_xcoff_read_ar_hdr (bfd *abfd)
{
  bfd_size_type namlen;
  struct areltdata *ret;
  bfd_size_type amt = sizeof (struct areltdata);

  ret = (struct areltdata *) bfd_alloc (abfd, amt);
  if (ret == NULL)
    return NULL;

  if (! xcoff_big_format_p (abfd))
    {
      struct xcoff_ar_hdr hdr;
      struct xcoff_ar_hdr *hdrp;

      if (bfd_bread (&hdr, (bfd_size_type) SIZEOF_AR_HDR, abfd)
	  != SIZEOF_AR_HDR)
	{
	  free (ret);
	  return NULL;
	}

      namlen = strtol (hdr.namlen, (char **) NULL, 10);
      amt = SIZEOF_AR_HDR + namlen + 1;
      hdrp = (struct xcoff_ar_hdr *) bfd_alloc (abfd, amt);
      if (hdrp == NULL)
	{
	  free (ret);
	  return NULL;
	}
      memcpy (hdrp, &hdr, SIZEOF_AR_HDR);
      if (bfd_bread ((char *) hdrp + SIZEOF_AR_HDR, namlen, abfd) != namlen)
	{
	  free (ret);
	  return NULL;
	}
      ((char *) hdrp)[SIZEOF_AR_HDR + namlen] = '\0';

      ret->arch_header = (char *) hdrp;
      ret->parsed_size = strtol (hdr.size, (char **) NULL, 10);
      ret->filename = (char *) hdrp + SIZEOF_AR_HDR;
    }
  else
    {
      struct xcoff_ar_hdr_big hdr;
      struct xcoff_ar_hdr_big *hdrp;

      if (bfd_bread (&hdr, (bfd_size_type) SIZEOF_AR_HDR_BIG, abfd)
	  != SIZEOF_AR_HDR_BIG)
	{
	  free (ret);
	  return NULL;
	}

      namlen = strtol (hdr.namlen, (char **) NULL, 10);
      amt = SIZEOF_AR_HDR_BIG + namlen + 1;
      hdrp = (struct xcoff_ar_hdr_big *) bfd_alloc (abfd, amt);
      if (hdrp == NULL)
	{
	  free (ret);
	  return NULL;
	}
      memcpy (hdrp, &hdr, SIZEOF_AR_HDR_BIG);
      if (bfd_bread ((char *) hdrp + SIZEOF_AR_HDR_BIG, namlen, abfd) != namlen)
	{
	  free (ret);
	  return NULL;
	}
      ((char *) hdrp)[SIZEOF_AR_HDR_BIG + namlen] = '\0';

      ret->arch_header = (char *) hdrp;
      /* XXX This actually has to be a call to strtoll (at least on 32-bit
	 machines) since the field width is 20 and there numbers with more
	 than 32 bits can be represented.  */
      ret->parsed_size = strtol (hdr.size, (char **) NULL, 10);
      ret->filename = (char *) hdrp + SIZEOF_AR_HDR_BIG;
    }

  /* Skip over the XCOFFARFMAG at the end of the file name.  */
  if (bfd_seek (abfd, (file_ptr) ((namlen & 1) + SXCOFFARFMAG), SEEK_CUR) != 0)
    return NULL;

  return ret;
}

/* Open the next element in an XCOFF archive.  */

bfd *
_bfd_xcoff_openr_next_archived_file (bfd *archive, bfd *last_file)
{
  file_ptr filestart;

  if (xcoff_ardata (archive) == NULL)
    {
      bfd_set_error (bfd_error_invalid_operation);
      return NULL;
    }

  if (! xcoff_big_format_p (archive))
    {
      if (last_file == NULL)
	filestart = bfd_ardata (archive)->first_file_filepos;
      else
	filestart = strtol (arch_xhdr (last_file)->nextoff, (char **) NULL,
			    10);

      if (filestart == 0
	  || filestart == strtol (xcoff_ardata (archive)->memoff,
				  (char **) NULL, 10)
	  || filestart == strtol (xcoff_ardata (archive)->symoff,
				  (char **) NULL, 10))
	{
	  bfd_set_error (bfd_error_no_more_archived_files);
	  return NULL;
	}
    }
  else
    {
      if (last_file == NULL)
	filestart = bfd_ardata (archive)->first_file_filepos;
      else
	/* XXX These actually have to be a calls to strtoll (at least
	   on 32-bit machines) si…