/* PEF support for BFD.
   Copyright 1999, 2000, 2001, 2002, 2003
   Free Software Foundation, Inc.

   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.  */

#include "safe-ctype.h"

#include "pef.h"
#include "pef-traceback.h"

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"

#include "libiberty.h"

#ifndef BFD_IO_FUNCS
#define BFD_IO_FUNCS 0
#endif

#define bfd_pef_close_and_cleanup                   _bfd_generic_close_and_cleanup
#define bfd_pef_bfd_free_cached_info                _bfd_generic_bfd_free_cached_info
#define bfd_pef_new_section_hook                    _bfd_generic_new_section_hook
#define bfd_pef_bfd_is_local_label_name             bfd_generic_is_local_label_name
#define bfd_pef_get_lineno                          _bfd_nosymbols_get_lineno
#define bfd_pef_find_nearest_line                   _bfd_nosymbols_find_nearest_line
#define bfd_pef_bfd_make_debug_symbol               _bfd_nosymbols_bfd_make_debug_symbol
#define bfd_pef_read_minisymbols                    _bfd_generic_read_minisymbols
#define bfd_pef_minisymbol_to_symbol                _bfd_generic_minisymbol_to_symbol
#define bfd_pef_get_reloc_upper_bound               _bfd_norelocs_get_reloc_upper_bound
#define bfd_pef_canonicalize_reloc                  _bfd_norelocs_canonicalize_reloc
#define bfd_pef_bfd_reloc_type_lookup               _bfd_norelocs_bfd_reloc_type_lookup
#define bfd_pef_set_arch_mach                       _bfd_generic_set_arch_mach
#define bfd_pef_get_section_contents                _bfd_generic_get_section_contents
#define bfd_pef_set_section_contents                _bfd_generic_set_section_contents
#define bfd_pef_bfd_get_relocated_section_contents  bfd_generic_get_relocated_section_contents
#define bfd_pef_bfd_relax_section                   bfd_generic_relax_section
#define bfd_pef_bfd_gc_sections                     bfd_generic_gc_sections
#define bfd_pef_bfd_merge_sections                  bfd_generic_merge_sections
#define bfd_pef_bfd_discard_group                   bfd_generic_discard_group
#define bfd_pef_bfd_link_hash_table_create          _bfd_generic_link_hash_table_create
#define bfd_pef_bfd_link_hash_table_free            _bfd_generic_link_hash_table_free
#define bfd_pef_bfd_link_add_symbols                _bfd_generic_link_add_symbols
#define bfd_pef_bfd_link_just_syms                  _bfd_generic_link_just_syms
#define bfd_pef_bfd_final_link                      _bfd_generic_final_link
#define bfd_pef_bfd_link_split_section              _bfd_generic_link_split_section
#define bfd_pef_get_section_contents_in_window      _bfd_generic_get_section_contents_in_window

static void bfd_pef_print_symbol               PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
static void bfd_pef_convert_architecture       PARAMS ((unsigned long, enum bfd_architecture *, unsigned long *));
static bfd_boolean bfd_pef_mkobject            PARAMS ((bfd *));
static int bfd_pef_parse_traceback_table       PARAMS ((bfd *, asection *, unsigned char *, size_t, size_t, asymbol *, FILE *));
static const char *bfd_pef_section_name        PARAMS ((bfd_pef_section *));
static unsigned long bfd_pef_section_flags     PARAMS ((bfd_pef_section *));
static asection *bfd_pef_make_bfd_section      PARAMS ((bfd *, bfd_pef_section *));
static int bfd_pef_read_header                 PARAMS ((bfd *, bfd_pef_header *));
static const bfd_target *bfd_pef_object_p      PARAMS ((bfd *));
static int bfd_pef_parse_traceback_tables      PARAMS ((bfd *, asection *, unsigned char *, size_t, long *, asymbol **));
static int bfd_pef_parse_function_stub         PARAMS ((bfd *, unsigned char *, size_t, unsigned long *));
static int bfd_pef_parse_function_stubs        PARAMS ((bfd *, asection *, unsigned char *, size_t, unsigned char *, size_t, unsigned long *, asymbol **));
static long bfd_pef_parse_symbols              PARAMS ((bfd *, asymbol **));
static long bfd_pef_count_symbols              PARAMS ((bfd *));
static long bfd_pef_get_symtab_upper_bound     PARAMS ((bfd *));
static long bfd_pef_canonicalize_symtab        PARAMS ((bfd *, asymbol **));
static asymbol *bfd_pef_make_empty_symbol      PARAMS ((bfd *));
static void bfd_pef_get_symbol_info            PARAMS ((bfd *, asymbol *, symbol_info *));
static int bfd_pef_sizeof_headers              PARAMS ((bfd *, bfd_boolean));
static int bfd_pef_xlib_read_header            PARAMS ((bfd *, bfd_pef_xlib_header *));
static int bfd_pef_xlib_scan                   PARAMS ((bfd *, bfd_pef_xlib_header *));
static const bfd_target *bfd_pef_xlib_object_p PARAMS ((bfd *));

static void
bfd_pef_print_symbol (abfd, afile, symbol, how)
     bfd *abfd;
     PTR afile;
     asymbol *symbol;
     bfd_print_symbol_type how;
{
  FILE *file = (FILE *) afile;

  switch (how)
    {
    case bfd_print_symbol_name:
      fprintf (file, "%s", symbol->name);
      break;
    default:
      bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
      fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
      if (strncmp (symbol->name, "__traceback_", strlen ("__traceback_")) == 0)
	{
	  char *buf = alloca (symbol->udata.i);
	  size_t offset = symbol->value + 4;
	  size_t len = symbol->udata.i;
	  int ret;

	  bfd_get_section_contents (abfd, symbol->section, buf, offset, len);
	  ret = bfd_pef_parse_traceback_table (abfd, symbol->section, buf,
					       len, 0, NULL, file);
	  if (ret < 0)
	    fprintf (file, " [ERROR]");
	}
    }
}

static void
bfd_pef_convert_architecture (architecture, type, subtype)
     unsigned long architecture;
     enum bfd_architecture *type;
     unsigned long *subtype;
{
  const unsigned long ARCH_POWERPC = 0x70777063; /* 'pwpc' */
  const unsigned long ARCH_M68K = 0x6d36386b; /* 'm68k' */

  *subtype = bfd_arch_unknown;
  *type = bfd_arch_unknown;

  if (architecture == ARCH_POWERPC)
    *type = bfd_arch_powerpc;
  else if (architecture == ARCH_M68K)
    *type = bfd_arch_m68k;
}

static bfd_boolean
bfd_pef_mkobject (abfd)
     bfd *abfd ATTRIBUTE_UNUSED;
{
  return TRUE;
}

static int
bfd_pef_parse_traceback_table (abfd, section, buf, len, pos, sym, file)
     bfd *abfd;
     asection *section;
     unsigned char *buf;
     size_t len;
     size_t pos;
     asymbol *sym;
     FILE *file;
{
  struct traceback_table table;
  size_t offset;
  const char *s;
  asymbol tmpsymbol;

  if (sym == NULL)
    sym = &tmpsymbol;

  sym->name = NULL;
  sym->value = 0;
  sym->the_bfd = abfd;
  sym->section = section;
  sym->flags = 0;
  sym->udata.i = 0;

  /* memcpy is fine since all fields are unsigned char.  */

  if ((pos + 8) > len)
    return -1;
  memcpy (&table, buf + pos, 8);

  /* Calling code relies on returned symbols having a name and
     correct offset.  */

  if ((table.lang != TB_C) && (table.lang != TB_CPLUSPLUS))
    return -1;

  if (! (table.flags2 & TB_NAME_PRESENT))
    return -1;

  if (! table.flags1 & TB_HAS_TBOFF)
    return -1;

  offset = 8;

  if ((table.flags5 & TB_FLOATPARAMS) || (table.fixedparams))
    offset += 4;

  if (table.flags1 & TB_HAS_TBOFF)
    {
      struct traceback_table_tboff off;

      if ((pos + offset + 4) > len)
	return -1;
      off.tb_offset = bfd_getb32 (buf + pos + offset);
      offset += 4;

      /* Need to subtract 4 because the offset includes the 0x0L
	 preceding the table.  */

      if (file != NULL)
	fprintf (file, " [offset = 0x%lx]", off.tb_offset);

      if ((file == NULL) && ((off.tb_offset + 4) > (pos + offset)))
	return -1;

      sym->value = pos - off.tb_offset - 4;
    }

  if (table.flags2 & TB_INT_HNDL)
    offset += 4;

  if (table.flags1 & TB_HAS_CTL)
    {
      struct traceback_table_anchors anchors;

      if ((pos + offset + 4) > len)
	return -1;
      anchors.ctl_info = bfd_getb32 (buf + pos + offset);
      offset += 4;

      if (anchors.ctl_info > 1024)
	return -1;

      offset += anchors.ctl_info * 4;
    }

  if (table.flags2 & TB_NAME_PRESENT)
    {
      struct traceback_table_routine name;
      char *namebuf;

      if ((pos + offset + 2) > len)
	return -1;
      name.name_len = bfd_getb16 (buf + pos + offset);
      offset += 2;

      if (name.name_len > 4096)
	return -1;

      if ((pos + offset + name.name_len) > len)
	return -1;

      namebuf = (char *) bfd_alloc (abfd, name.name_len + 1);
      if (namebuf == NULL)
	return -1;

      memcpy (namebuf, buf + pos + offset, name.name_len);
      namebuf[name.name_len] = '\0';

      /* Strip leading period inserted by compiler.  */
      if (namebuf[0] == '.')
	memmove (namebuf, namebuf + 1, name.name_len + 1);

      sym->name = namebuf;

      for (s = sym->name; (*s != '\0'); s++)
	if (! ISPRINT (*s))
	  return -1;

      offset += name.name_len;
    }

  if (table.flags2 & TB_USES_ALLOCA)
    offset += 4;

  if (table.flags4 & TB_HAS_VEC_INFO)
    offset += 4;

  if (file != NULL)
    fprintf (file, " [length = 0x%lx]", (long) offset);

  return offset;
}

static const char *bfd_pef_section_name (section)
     bfd_pef_section *section;
{
  switch (section->section_kind)
    {
    case BFD_PEF_SECTION_CODE: return "code";
    case BFD_PEF_SECTION_UNPACKED_DATA: return "unpacked-data";
    case BFD_PEF_SECTION_PACKED_DATA: return "packed-data";
    case BFD_PEF_SECTION_CONSTANT: return "constant";
    case BFD_PEF_SECTION_LOADER: return "loader";
    case BFD_PEF_SECTION_DEBUG: return "debug";
    case BFD_PEF_SECTION_EXEC_DATA: return "exec-data";
    case BFD_PEF_SECTION_EXCEPTION: return "exception";
    case BFD_PEF_SECTION_TRACEBACK: return "traceback";
    default: return "unknown";
    }
}

static unsigned long bfd_pef_section_flags (section)
     bfd_pef_section *section;
{
  switch (section->section_kind)
    {
    case BFD_PEF_SECTION_CODE:
      return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
    case BFD_PEF_SECTION_UNPACKED_DATA:
    case BFD_PEF_SECTION_PACKED_DATA:
    case BFD_PEF_SECTION_CONSTANT:
    case BFD_PEF_SECTION_LOADER:
    case BFD_PEF_SECTION_DEBUG:
    case BFD_PEF_SECTION_EXEC_DATA:
    case BFD_PEF_SECTION_EXCEPTION:
    case BFD_PEF_SECTION_TRACEBACK:
    default:
      return SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
    }
}

static asection *
bfd_pef_make_bfd_section (abfd, section)
     bfd *abfd;
     bfd_pef_section *section;
{
  asection *bfdsec;
  const char *name = bfd_pef_section_name (section);

  bfdsec = bfd_make_section_anyway (abfd, name);
  if (bfdsec == NULL)
    return NULL;

  bfdsec->vma = section->default_address + section->container_offset;
  bfdsec->lma = section->default_address + section->container_offset;
  bfdsec->_raw_size = section->container_length;
  bfdsec->filepos = section->container_offset;
  bfdsec->alignment_power = section->alignment;

  bfdsec->flags = bfd_pef_section_flags (section);

  return bfdsec;
}

int bfd_pef_parse_loader_header (abfd, buf, len, header)
     bfd *abfd ATTRIBUTE_UNUSED;
     unsigned char *buf;
     size_t len;
     bfd_pef_loader_header *header;
{
  BFD_ASSERT (len == 56);

  header->main_section = bfd_getb32 (buf);
  header->main_offset = bfd_getb32 (buf + 4);
  header->init_section = bfd_getb32 (buf + 8);
  header->init_offset = bfd_getb32 (buf + 12);
  header->term_section = bfd_getb32 (buf + 16);
  header->term_offset = bfd_getb32 (buf + 20);
  header->imported_library_count = bfd_getb32 (buf + 24);
  header->total_imported_symbol_count = bfd_getb32 (buf + 28);
  header->reloc_section_count = bfd_getb32 (buf + 32);
  header->reloc_instr_offset = bfd_getb32 (buf + 36);
  header->loader_strings_offset = bfd_getb32 (buf + 40);
  header->export_hash_offset = bfd_getb32 (buf + 44);
  header->export_hash_table_power = bfd_getb32 (buf + 48);
  header->exported_symbol_count = bfd_getb32 (buf + 52);

  return 0;
}

int bfd_pef_parse_imported_library (abfd, buf, len, header)
     bfd *abfd ATTRIBUTE_UNUSED;
     unsigned char *buf;
     size_t len;
     bfd_pef_imported_library *header;
{
  BFD_ASSERT (len == 24);

  header->name_offset = bfd_getb32 (buf);
  header->old_implementation_version = bfd_getb32 (buf + 4);
  header->current_version = bfd_getb32 (buf + 8);
  header->imported_symbol_count = bfd_getb32 (buf + 12);
  header->first_imported_symbol = bfd_getb32 (buf + 16);
  header->options = buf[20];
  header->reserved_a = buf[21];
  header->reserved_b = bfd_getb16 (buf + 22);

  return 0;
}

int bfd_pef_parse_imported_symbol (abfd, buf, len, symbol)
     bfd *abfd ATTRIBUTE_UNUSED;
     unsigned char *buf;
     size_t len;
     bfd_pef_imported_symbol *symbol;
{
  unsigned long value;

  BFD_ASSERT (len == 4);

  value = bfd_getb32 (buf);
  symbol->class = value >> 24;
  symbol->name = value & 0x00ffffff;

  return 0;
}

int bfd_pef_scan_section (abfd, section)
     bfd *abfd;
     bfd_pef_section *section;
{
  unsigned char buf[28];

  bfd_seek (abfd, section->header_offset, SEEK_SET);
  if (bfd_bread ((PTR) buf, 28, abfd) != 28)
    return -1;

  section->name_offset = bfd_h_get_32 (abfd, buf);
  section->default_address = bfd_h_get_32 (abfd, buf + 4);
  section->total_length = bfd_h_get_32 (abfd, buf + 8);
  section->unpacked_length = bfd_h_get_32 (abfd, buf + 12);
  section->container_length = bfd_h_get_32 (abfd, buf + 16);
  section->container_offset = bfd_h_get_32 (abfd, buf + 20);
  section->section_kind = buf[24];
  section->share_kind = buf[25];
  section->alignment = buf[26];
  section->reserved = buf[27];

  section->bfd_section = bfd_pef_make_bfd_section (abfd, section);
  if (section->bfd_section == NULL)
    return -1;

  return 0;
}

void
bfd_pef_print_loader_header (abfd, header, file)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_pef_loader_header *header;
     FILE *file;
{
  fprintf (file, "main_section: %ld\n", header->main_section);
  fprintf (file, "main_offset: %lu\n", header->main_offset);
  fprintf (file, "init_section: %ld\n", header->init_section);
  fprintf (file, "init_offset: %lu\n", header->init_offset);
  fprintf (file, "term_section: %ld\n", header->term_section);
  fprintf (file, "term_offset: %lu\n", header->term_offset);
  fprintf (file, "imported_library_count: %lu\n",
	   header->imported_library_count);
  fprintf (file, "total_imported_symbol_count: %lu\n",
	   header->total_imported_symbol_count);
  fprintf (file, "reloc_section_count: %lu\n", header->reloc_section_count);
  fprintf (file, "reloc_instr_offset: %lu\n", header->reloc_instr_offset);
  fprintf (file, "loader_strings_offset: %lu\n",
	   header->loader_strings_offset);
  fprintf (file, "export_hash_offset: %lu\n", header->export_hash_offset);
  fprintf (file, "export_hash_table_power: %lu\n",
	   header->export_hash_table_power);
  fprintf (file, "exported_symbol_count: %lu\n",
	   header->exported_symbol_count);
}

int
bfd_pef_print_loader_section (abfd, file)
     bfd *abfd;
     FILE *file;
{
  bfd_pef_loader_header header;
  asection *loadersec = NULL;
  unsigned char *loaderbuf = NULL;
  size_t loaderlen = 0;
  int ret;

  loadersec = bfd_get_section_by_name (abfd, "loader");
  if (loadersec == NULL)
    return -1;

  loaderlen = bfd_section_size (abfd, loadersec);
  loaderbuf = (unsigned char *) bfd_malloc (loaderlen);
  if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
    {
      free (loaderbuf);
      return -1;
    }
  if (bfd_bread ((PTR) loaderbuf, loaderlen, abfd) != loaderlen)
    {
      free (loaderbuf);
      return -1;
    }

  if (loaderlen < 56)
    {
      free (loaderbuf);
      return -1;
    }
  ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
  if (ret < 0)
    {
      free (loaderbuf);
      return -1;
    }

  bfd_pef_print_loader_header (abfd, &header, file);
  return 0;
}

int
bfd_pef_scan_start_address (abfd)
     bfd *abfd;
{
  bfd_pef_loader_header header;
  asection *section;

  asection *loadersec = NULL;
  unsigned char *loaderbuf = NULL;
  size_t loaderlen = 0;
  int ret;

  loadersec = bfd_get_section_by_name (abfd, "loader");
  if (loadersec == NULL)
    goto end;

  loaderlen = bfd_section_size (abfd, loadersec);
  loaderbuf = (unsigned char *) bfd_malloc (loaderlen);
  if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
    goto error;
  if (bfd_bread ((PTR) loaderbuf, loaderlen, abfd) != loaderlen)
    goto error;

  if (loaderlen < 56)
    goto error;
  ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
  if (ret < 0)
    goto error;

  if (header.main_section < 0)
    goto end;

  for (section = abfd->sections; section != NULL; section = section->next)
    if ((section->index + 1) == header.main_section)
      break;

  if (section == NULL)
    goto error;

  abfd->start_address = section->vma + header.main_offset;

 end:
  if (loaderbuf != NULL)
    free (loaderbuf);
  return 0;

 error:
  if (loaderbuf != NULL)
    free (loaderbuf);
  return -1;
}

int
bfd_pef_scan (abfd, header, mdata)
     bfd *abfd;
     bfd_pef_header *header;
     bfd_pef_data_struct *mdata;
{
  unsigned int i;
  enum bfd_architecture cputype;
  unsigned long cpusubtype;

  mdata->header = *header;

  bfd_pef_convert_architecture (header->architecture, &cputype, &cpusubtype);
  if (cputype == bfd_arch_unknown)
    {
      fprintf (stderr, "bfd_pef_scan: unknown architecture 0x%lx\n",
	       header->architecture);
      return -1;
    }
  bfd_set_arch_mach (abfd, cputype, cpusubtype);

  mdata->header = *header;

  abfd->flags = (abfd->xvec->object_flags
		 | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));

  if (header->section_count != 0)
    {
      mdata->sections =
	((bfd_pef_section *)
	 bfd_alloc (abfd, header->section_count * sizeof (bfd_pef_section)));

      if (mdata->sections == NULL)
	return -1;

      for (i = 0; i < header->section_count; i++)
	{
	  bfd_pef_section *cur = &mdata->sections[i];
	  cur->header_offset = 40 + (i * 28);
	  if (bfd_pef_scan_section (abfd, cur) < 0)
	    return -1;
	}
    }

  if (bfd_pef_scan_start_address (abfd) < 0)
    {
#if 0
      fprintf (stderr, "bfd_pef_scan: unable to scan start address: %s\n",
	       bfd_errmsg (bfd_get_error ()));
      return -1;
#endif
    }

  abfd->tdata.pef_data = mdata;

  return 0;
}

static int
bfd_pef_read_header (abfd, header)
     bfd *abfd;
     bfd_pef_header *header;
{
  unsigned char buf[40];

  bfd_seek (abfd, 0, SEEK_SET);

  if (bfd_bread ((PTR) buf, 40, abfd) != 40)
    return -1;

  header->tag1 = bfd_getb32 (buf);
  header->tag2 = bfd_getb32 (buf + 4);
  header->architecture = bfd_getb32 (buf + 8);
  header->format_version = bfd_getb32 (buf + 12);
  header->timestamp = bfd_getb32 (buf + 16);
  header->old_definition_version = bfd_getb32 (buf + 20);
  header->old_implementation_version = bfd_getb32 (buf + 24);
  header->current_version = bfd_getb32 (buf + 28);
  header->section_count = bfd_getb32 (buf + 32) + 1;
  header->instantiated_section_count = bfd_getb32 (buf + 34);
  header->reserved = bfd_getb32 (buf + 36);

  return 0;
}

static const bfd_target *
bfd_pef_object_p (abfd)
     bfd *abfd;
{
  struct bfd_preserve preserve;
  bfd_pef_header header;

  preserve.marker = NULL;
  if (bfd_pef_read_header (abfd, &header) != 0)
    goto wrong;

  if (header.tag1 != BFD_PEF_TAG1 || header.tag2 != BFD_PEF_TAG2)
    goto wrong;

  preserve.marker = bfd_zalloc (abfd, sizeof (bfd_pef_data_struct));
  if (preserve.marker == NULL
      || !bfd_preserve_save (abfd, &preserve))
    goto fail;

  if (bfd_pef_scan (abfd, &header,
		    (bfd_pef_data_struct *) preserve.marker) != 0)
    goto wrong;

  bfd_preserve_finish (abfd, &preserve);
  return abfd->xvec;

 wrong:
  bfd_set_error (bfd_error_wrong_format);

 fail:
  if (preserve.marker != NULL)
    bfd_preserve_restore (abfd, &preserve);
  return NULL;
}

static int bfd_pef_parse_traceback_tables (abfd, sec, buf, len, nsym, csym)
     bfd *abfd;
     asection *sec;
     unsigned char *buf;
     size_t len;
     long *nsym;
     asymbol **csym;
{
  char *name;

  asymbol function;
  asymbol traceback;

  const char *const tbprefix = "__traceback_";
  size_t tbnamelen;

  size_t pos = 0;
  unsigned long count = 0;
  int ret;

  for (;;)
    {
      /* We're reading symbols two at a time.  */
      if (csym && ((csym[count] == NULL) || (csym[count + 1] == NULL)))
	break;

      pos += 3;
      pos -= (pos % 4);

      while ((pos + 4) <= len)
	{
	  if (bfd_getb32 (buf + pos) == 0)
	    break;
	  pos += 4;
	}

      if ((pos + 4) > len)
	break;

      ret = bfd_pef_parse_traceback_table (abfd, sec, buf, len, pos + 4,
					   &function, 0);
      if (ret < 0)
	{
	  /* Skip over 0x0L to advance to next possible traceback table.  */
	  pos += 4;
	  continue;
	}

      BFD_ASSERT (function.name != NULL);

      /* Don't bother to compute the name if we are just
	 counting symbols.  */

      if (csym)
	{
	  tbnamelen = strlen (tbprefix) + strlen (function.name);
	  name = bfd_alloc (abfd, tbnamelen + 1);
	  if (name == NULL)
	    {
	      bfd_release (abfd, (PTR) function.name);
	      function.name = NULL;
	      break;
	    }
	  snprintf (name, tbnamelen + 1, "%s%s", tbprefix, function.name);
	  traceback.name = name;
	  traceback.value = pos;
	  traceback.the_bfd = abfd;
	  traceback.section = sec;
	  traceback.flags = 0;
	  traceback.udata.i = ret;

	  *(csym[count]) = function;
	  *(csym[count + 1]) = traceback;
	}

      pos += ret;
      count += 2;
    }

  *nsym = count;
  return 0;
}

static int bfd_pef_parse_function_stub (abfd, buf, len, offset)
     bfd *abfd ATTRIBUTE_UNUSED;
     unsigned char *buf;
     size_t len;
     unsigned long *offset;
{
  BFD_ASSERT (len == 24);

  if ((bfd_getb32 (buf) & 0xffff0000) != 0x81820000)
    return -1;
  if (bfd_getb32 (buf + 4) != 0x90410014)
    return -1;
  if (bfd_getb32 (buf + 8) != 0x800c0000)
    return -1;
  if (bfd_getb32 (buf + 12) != 0x804c0004)
    return -1;
  if (bfd_getb32 (buf + 16) != 0x7c0903a6)
    return -1;
  if (bfd_getb32 (buf + 20) != 0x4e800420)
    return -1;

  if (offset != NULL)
    *offset = (bfd_getb32 (buf) & 0x0000ffff) / 4;

  return 0;
}

static int bfd_pef_parse_function_stubs (abfd, codesec, codebuf, codelen,
					 loaderbuf, loaderlen, nsym, csym)
     bfd *abfd;
     asection *codesec;
     unsigned char *codebuf;
     size_t codelen;
     unsigned char *loaderbuf;
     size_t loaderlen;
     unsigned long *nsym;
     asymbol **csym;
{
  const char *const sprefix = "__stub_";

  size_t codepos = 0;
  unsigned long count = 0;

  bfd_pef_loader_header header;
  bfd_pef_imported_library *libraries = NULL;
  bfd_pef_imported_symbol *imports = NULL;

  unsigned long i;
  int ret;

  if (loaderlen < 56)
    goto error;

  ret = bfd_pef_parse_loader_header (abfd, loaderbuf, 56, &header);
  if (ret < 0)
    goto error;

  libraries = (bfd_pef_imported_library *) bfd_malloc
    (header.imported_library_count * sizeof (bfd_pef_imported_library));
  imports = (bfd_pef_imported_symbol *) bfd_malloc
    (header.total_imported_symbol_count * sizeof (bfd_pef_imported_symbol));

  if (loaderlen < (56 + (header.imported_library_count * 24)))
    goto error;
  for (i = 0; i < header.imported_library_count; i++)
    {
      ret = bfd_pef_parse_imported_library
	(abfd, loaderbuf + 56 + (i * 24), 24, &libraries[i]);
      if (ret < 0)
	goto error;
    }

  if (loaderlen < (56 + (header.imported_library_count * 24)
		   + (header.total_imported_symbol_count * 4)))
    goto error;
  for (i = 0; i < header.total_imported_symbol_count; i++)
    {
      ret = (bfd_pef_parse_imported_symbol
	     (abfd,
	      loaderbuf + 56 + (header.imported_library_count * 24) + (i * 4),
	      4, &imports[i]));
      if (ret < 0)
	goto error;
    }

  codepos = 0;

  for (;;)
    {
      asymbol sym;
      const char *symname;
      char *name;
      unsigned long index;
      int ret;

      if (csym && (csym[count] == NULL))
	break;

      codepos += 3;
      codepos -= (codepos % 4);

      while ((codepos + 4) <= codelen)
	{
	  if ((bfd_getb32 (codebuf + codepos) & 0xffff0000) == 0x81820000)
	    break;
	  codepos += 4;
	}

      if ((codepos + 4) > codelen)
	break;

      ret = bfd_pef_parse_function_stub (abfd, codebuf + codepos, 24, &index);
      if (ret < 0)
	{
	  codepos += 24;
	  continue;
	}

      if (index >= header.total_imported_symbol_count)
	{
	  codepos += 24;
	  continue;
	}

      {
	size_t max, namelen;
	const char *s;

	if (loaderlen < (header.loader_strings_offset + imports[index].name))
	  goto error;

	max = loaderlen - (header.loader_strings_offset + imports[index].name);
	symname = loaderbuf + header.loader_strings_offset + imports[index].name;
	namelen = 0;
	for (s = symname; s < (symname + max); s++)
	  {
	    if (*s == '\0')
	      break;
	    if (! ISPRINT (*s))
	      goto error;
	    namelen++;
	  }
	if (*s != '\0')
	  goto error;

	name = bfd_alloc (abfd, strlen (sprefix) + namelen + 1);
	if (name == NULL)
	  break;

	snprintf (name, strlen (sprefix) + namelen + 1, "%s%s",
		  sprefix, symname);
	sym.name = name;
      }

      sym.value = codepos;
      sym.the_bfd = abfd;
      sym.section = codesec;
      sym.flags = 0;
      sym.udata.i = 0;

      codepos += 24;

      if (csym != NULL)
	*(csym[count]) = sym;

      count++;
    }

  goto end;

 end:
  if (libraries != NULL)
    free (libraries);
  if (imports != NULL)
    free (imports);
  *nsym = count;
  return 0;

 error:
  if (libraries != NULL)
    free (libraries);
  if (imports != NULL)
    free (imports);
  *nsym = count;
  return -1;
}

static long bfd_pef_parse_symbols (abfd, csym)
     bfd *abfd;
     asymbol **csym;
{
  unsigned long count = 0;

  asection *codesec = NULL;
  unsigned char *codebuf = NULL;
  size_t codelen = 0;

  asection *loadersec = NULL;
  unsigned char *loaderbuf = NULL;
  size_t loaderlen = 0;

  codesec = bfd_get_section_by_name (abfd, "code");
  if (codesec != NULL)
    {
      codelen = bfd_section_size (abfd, codesec);
      codebuf = (unsigned char *) bfd_malloc (codelen);
      if (bfd_seek (abfd, codesec->filepos, SEEK_SET) < 0)
	goto end;
      if (bfd_bread ((PTR) codebuf, codelen, abfd) != codelen)
	goto end;
    }

  loadersec = bfd_get_section_by_name (abfd, "loader");
  if (loadersec != NULL)
    {
      loaderlen = bfd_section_size (abfd, loadersec);
      loaderbuf = (unsigned char *) bfd_malloc (loaderlen);
      if (bfd_seek (abfd, loadersec->filepos, SEEK_SET) < 0)
	goto end;
      if (bfd_bread ((PTR) loaderbuf, loaderlen, abfd) != loaderlen)
	goto end;
    }

  count = 0;
  if (codesec != NULL)
    {
      unsigned long ncount = 0;
      bfd_pef_parse_traceback_tables (abfd, codesec, codebuf, codelen,
				      &ncount, csym);
      count += ncount;
    }

  if ((codesec != NULL) && (loadersec != NULL))
    {
      unsigned long ncount = 0;
      bfd_pef_parse_function_stubs
	(abfd, codesec, codebuf, codelen, loaderbuf, loaderlen, &ncount,
	 (csym != NULL) ? (csym + count) : NULL);
      count += ncount;
    }

  if (csym != NULL)
    csym[count] = NULL;

 end:
  if (codebuf != NULL)
    free (codebuf);

  if (loaderbuf != NULL)
    free (loaderbuf);

  return count;
}

static long
bfd_pef_count_symbols (abfd)
     bfd *abfd;
{
  return bfd_pef_parse_symbols (abfd, NULL);
}

static long
bfd_pef_get_symtab_upper_bound (abfd)
     bfd *abfd;
{
  long nsyms = bfd_pef_count_symbols (abfd);
  if (nsyms < 0)
    return nsyms;
  return ((nsyms + 1) * sizeof (asymbol *));
}

static long
bfd_pef_canonicalize_symtab (abfd, alocation)
     bfd *abfd;
     asymbol **alocation;
{
  long i;
  asymbol *syms;
  long ret;

  long nsyms = bfd_pef_count_symbols (abfd);
  if (nsyms < 0)
    return nsyms;

  syms = bfd_alloc (abfd, nsyms * sizeof (asymbol));
  if (syms == NULL)
    return -1;

  for (i = 0; i < nsyms; i++)
    alocation[i] = &syms[i];

  alocation[nsyms] = NULL;

  ret = bfd_pef_parse_symbols (abfd, alocation);
  if (ret != nsyms)
    return 0;

  return ret;
}

static asymbol *
bfd_pef_make_empty_symbol (abfd)
     bfd *abfd;
{
  return (asymbol *) bfd_alloc (abfd, sizeof (asymbol));
}

static void
bfd_pef_get_symbol_info (abfd, symbol, ret)
     bfd *abfd ATTRIBUTE_UNUSED;
     asymbol *symbol;
     symbol_info *ret;
{
  bfd_symbol_info (symbol, ret);
}

static int
bfd_pef_sizeof_headers (abfd, exec)
     bfd *abfd ATTRIBUTE_UNUSED;
     bfd_boolean exec ATTRIBUTE_UNUSED;
{
  return 0;
}

const bfd_target pef_vec =
{
  "pef",			/* name */
  bfd_target_pef_flavour,	/* flavour */
  BFD_ENDIAN_BIG,		/* byteorder */
  BFD_ENDIAN_BIG,		/* header_byteorder */
  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
  (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
   | SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */
  0,				/* symbol_leading_char */
  ' ',				/* ar_pad_char */
  16,				/* ar_max_namelen */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* data */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* hdrs */
  {				/* bfd_check_format */
    _bfd_dummy_target,
    bfd_pef_object_p,		/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {				/* bfd_set_format */
    bfd_false,
    bfd_pef_mkobject,
    bfd_false,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    bfd_true,
    bfd_false,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (bfd_pef),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  BFD_JUMP_TABLE_SYMBOLS (bfd_pef),
  BFD_JUMP_TABLE_RELOCS (bfd_pef),
  BFD_JUMP_TABLE_WRITE (bfd_pef),
  BFD_JUMP_TABLE_LINK (bfd_pef),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  NULL
};

#define bfd_pef_xlib_close_and_cleanup _bfd_generic_close_and_cleanup
#define bfd_pef_xlib_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define bfd_pef_xlib_new_section_hook _bfd_generic_new_section_hook
#define bfd_pef_xlib_get_section_contents _bfd_generic_get_section_contents
#define bfd_pef_xlib_set_section_contents _bfd_generic_set_section_contents
#define bfd_pef_xlib_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
#define bfd_pef_xlib_set_section_contents_in_window _bfd_generic_set_section_contents_in_window

static int
bfd_pef_xlib_read_header (abfd, header)
     bfd *abfd;
     bfd_pef_xlib_header *header;
{
  unsigned char buf[76];

  bfd_seek (abfd, 0, SEEK_SET);

  if (bfd_bread ((PTR) buf, 76, abfd) != 76)
    return -1;

  header->tag1 = bfd_getb32 (buf);
  header->tag2 = bfd_getb32 (buf + 4);
  header->current_format = bfd_getb32 (buf + 8);
  header->container_strings_offset = bfd_getb32 (buf + 12);
  header->export_hash_offset = bfd_getb32 (buf + 16);
  header->export_key_offset = bfd_getb32 (buf + 20);
  header->export_symbol_offset = bfd_getb32 (buf + 24);
  header->export_names_offset = bfd_getb32 (buf + 28);
  header->export_hash_table_power = bfd_getb32 (buf + 32);
  header->exported_symbol_count = bfd_getb32 (buf + 36);
  header->frag_name_offset = bfd_getb32 (buf + 40);
  header->frag_name_length = bfd_getb32 (buf + 44);
  header->dylib_path_offset = bfd_getb32 (buf + 48);
  header->dylib_path_length = bfd_getb32 (buf + 52);
  header->cpu_family = bfd_getb32 (buf + 56);
  header->cpu_model = bfd_getb32 (buf + 60);
  header->date_time_stamp = bfd_getb32 (buf + 64);
  header->current_version = bfd_getb32 (buf + 68);
  header->old_definition_version = bfd_getb32 (buf + 72);
  header->old_implementation_version = bfd_getb32 (buf + 76);

  return 0;
}

int
bfd_pef_xlib_scan (abfd, header)
     bfd *abfd;
     bfd_pef_xlib_header *header;
{
  bfd_pef_xlib_data_struct *mdata = NULL;

  mdata = ((bfd_pef_xlib_data_struct *)
	   bfd_alloc (abfd, sizeof (bfd_pef_xlib_data_struct)));
  if (mdata == NULL)
    return -1;

  mdata->header = *header;

  abfd->flags = (abfd->xvec->object_flags
		 | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS)));

  abfd->tdata.pef_xlib_data = mdata;

  return 0;
}

static const bfd_target *
bfd_pef_xlib_object_p (abfd)
     bfd *abfd;
{
  struct bfd_preserve preserve;
  bfd_pef_xlib_header header;

  if (bfd_pef_xlib_read_header (abfd, &header) != 0)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if ((header.tag1 != BFD_PEF_XLIB_TAG1)
      || ((header.tag2 != BFD_PEF_VLIB_TAG2)
	  && (header.tag2 != BFD_PEF_BLIB_TAG2)))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (! bfd_preserve_save (abfd, &preserve))
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  if (bfd_pef_xlib_scan (abfd, &header) != 0)
    {
      bfd_preserve_restore (abfd, &preserve);
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  bfd_preserve_finish (abfd, &preserve);
  return abfd->xvec;
}

const bfd_target pef_xlib_vec =
{
  "pef-xlib",			/* name */
  bfd_target_pef_xlib_flavour,	/* flavour */
  BFD_ENDIAN_BIG,		/* byteorder */
  BFD_ENDIAN_BIG,		/* header_byteorder */
  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
  (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
   | SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */
  0,				/* symbol_leading_char */
  ' ',				/* ar_pad_char */
  16,				/* ar_max_namelen */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* data */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* hdrs */
  {				/* bfd_check_format */
    _bfd_dummy_target,
    bfd_pef_xlib_object_p,	/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {				/* bfd_set_format */
    bfd_false,
    bfd_pef_mkobject,
    bfd_false,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    bfd_true,
    bfd_false,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (bfd_pef_xlib),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
  BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
  BFD_JUMP_TABLE_WRITE (_bfd_nowrite),
  BFD_JUMP_TABLE_LINK (_bfd_nolink),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  NULL
};
