Subversion Repositories openrisc_2011-10-31

/* Mach-O support for BFD.

   Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008

   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 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 "mach-o.h"

#include "bfd.h"

#include "libbfd.h"

#include "libiberty.h"

#include <ctype.h>

#ifndef BFD_IO_FUNCS

#define BFD_IO_FUNCS 0

#endif

#define bfd_mach_o_mkarchive                          _bfd_noarchive_mkarchive

#define bfd_mach_o_read_ar_hdr                        _bfd_noarchive_read_ar_hdr

#define bfd_mach_o_slurp_armap                        _bfd_noarchive_slurp_armap

#define bfd_mach_o_slurp_extended_name_table          _bfd_noarchive_slurp_extended_name_table

#define bfd_mach_o_construct_extended_name_table      _bfd_noarchive_construct_extended_name_table

#define bfd_mach_o_truncate_arname                    _bfd_noarchive_truncate_arname

#define bfd_mach_o_write_armap                        _bfd_noarchive_write_armap

#define bfd_mach_o_get_elt_at_index                   _bfd_noarchive_get_elt_at_index

#define bfd_mach_o_generic_stat_arch_elt              _bfd_noarchive_generic_stat_arch_elt

#define bfd_mach_o_update_armap_timestamp             _bfd_noarchive_update_armap_timestamp

#define bfd_mach_o_close_and_cleanup                  _bfd_generic_close_and_cleanup

#define bfd_mach_o_bfd_free_cached_info               _bfd_generic_bfd_free_cached_info

#define bfd_mach_o_new_section_hook                   _bfd_generic_new_section_hook

#define bfd_mach_o_get_section_contents_in_window     _bfd_generic_get_section_contents_in_window

#define bfd_mach_o_bfd_is_local_label_name            _bfd_nosymbols_bfd_is_local_label_name

#define bfd_mach_o_bfd_is_target_special_symbol       ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)

#define bfd_mach_o_bfd_is_local_label_name            _bfd_nosymbols_bfd_is_local_label_name

#define bfd_mach_o_get_lineno                         _bfd_nosymbols_get_lineno

#define bfd_mach_o_find_nearest_line                  _bfd_nosymbols_find_nearest_line

#define bfd_mach_o_find_inliner_info                  _bfd_nosymbols_find_inliner_info

#define bfd_mach_o_bfd_make_debug_symbol              _bfd_nosymbols_bfd_make_debug_symbol

#define bfd_mach_o_read_minisymbols                   _bfd_generic_read_minisymbols

#define bfd_mach_o_minisymbol_to_symbol               _bfd_generic_minisymbol_to_symbol

#define bfd_mach_o_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents

#define bfd_mach_o_bfd_relax_section                  bfd_generic_relax_section

#define bfd_mach_o_bfd_link_hash_table_create         _bfd_generic_link_hash_table_create

#define bfd_mach_o_bfd_link_hash_table_free           _bfd_generic_link_hash_table_free

#define bfd_mach_o_bfd_link_add_symbols               _bfd_generic_link_add_symbols

#define bfd_mach_o_bfd_link_just_syms                 _bfd_generic_link_just_syms

#define bfd_mach_o_bfd_final_link                     _bfd_generic_final_link

#define bfd_mach_o_bfd_link_split_section             _bfd_generic_link_split_section

#define bfd_mach_o_set_arch_mach                      bfd_default_set_arch_mach

#define bfd_mach_o_bfd_merge_private_bfd_data         _bfd_generic_bfd_merge_private_bfd_data

#define bfd_mach_o_bfd_set_private_flags              _bfd_generic_bfd_set_private_flags

#define bfd_mach_o_bfd_print_private_bfd_data         _bfd_generic_bfd_print_private_bfd_data

#define bfd_mach_o_get_section_contents               _bfd_generic_get_section_contents

#define bfd_mach_o_set_section_contents               _bfd_generic_set_section_contents

#define bfd_mach_o_bfd_gc_sections                    bfd_generic_gc_sections

#define bfd_mach_o_bfd_merge_sections                 bfd_generic_merge_sections

#define bfd_mach_o_bfd_is_group_section               bfd_generic_is_group_section

#define bfd_mach_o_bfd_discard_group                  bfd_generic_discard_group

#define bfd_mach_o_section_already_linked             _bfd_generic_section_already_linked

#define bfd_mach_o_bfd_copy_private_header_data       _bfd_generic_bfd_copy_private_header_data

#define bfd_mach_o_core_file_matches_executable_p     generic_core_file_matches_executable_p

/* The flags field of a section structure is separated into two parts a section

   type and section attributes.  The section types are mutually exclusive (it

   can only have one type) but the section attributes are not (it may have more

   than one attribute).  */

#define SECTION_TYPE             0x000000ff     /* 256 section types.  */

#define SECTION_ATTRIBUTES       0xffffff00     /*  24 section attributes.  */

/* Constants for the section attributes part of the flags field of a section

   structure.  */

#define SECTION_ATTRIBUTES_USR   0xff000000     /* User-settable attributes.  */

#define S_ATTR_PURE_INSTRUCTIONS 0x80000000     /* Section contains only true machine instructions.  */

#define SECTION_ATTRIBUTES_SYS   0x00ffff00     /* System setable attributes.  */

#define S_ATTR_SOME_INSTRUCTIONS 0x00000400     /* Section contains some machine instructions.  */

#define S_ATTR_EXT_RELOC         0x00000200     /* Section has external relocation entries.  */

#define S_ATTR_LOC_RELOC         0x00000100     /* Section has local relocation entries.  */

#define N_STAB 0xe0

#define N_TYPE 0x1e

#define N_EXT  0x01

#define N_UNDF 0x0

#define N_ABS  0x2

#define N_SECT 0xe

#define N_INDR 0xa

bfd_boolean

bfd_mach_o_valid (bfd *abfd)

{

  if (abfd == NULL || abfd->xvec == NULL)

    return 0;

  if (! ((abfd->xvec == &mach_o_be_vec)

         || (abfd->xvec == &mach_o_le_vec)

         || (abfd->xvec == &mach_o_fat_vec)))

    return 0;

  if (abfd->tdata.mach_o_data == NULL)

    return 0;

  return 1;

}

/* Copy any private info we understand from the input symbol

   to the output symbol.  */

static bfd_boolean

bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,

                                         asymbol *isymbol ATTRIBUTE_UNUSED,

                                         bfd *obfd ATTRIBUTE_UNUSED,

                                         asymbol *osymbol ATTRIBUTE_UNUSED)

{

  return TRUE;

}

/* Copy any private info we understand from the input section

   to the output section.  */

static bfd_boolean

bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,

                                          asection *isection ATTRIBUTE_UNUSED,

                                          bfd *obfd ATTRIBUTE_UNUSED,

                                          asection *osection ATTRIBUTE_UNUSED)

{

  return TRUE;

}

/* Copy any private info we understand from the input bfd

   to the output bfd.  */

static bfd_boolean

bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd)

{

  BFD_ASSERT (bfd_mach_o_valid (ibfd));

  BFD_ASSERT (bfd_mach_o_valid (obfd));

  obfd->tdata.mach_o_data = ibfd->tdata.mach_o_data;

  obfd->tdata.mach_o_data->ibfd = ibfd;

  return TRUE;

}

static long

bfd_mach_o_count_symbols (bfd *abfd)

{

  bfd_mach_o_data_struct *mdata = NULL;

  long nsyms = 0;

  unsigned long i;

  BFD_ASSERT (bfd_mach_o_valid (abfd));

  mdata = abfd->tdata.mach_o_data;

  for (i = 0; i < mdata->header.ncmds; i++)

    if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)

      {

        bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;

        nsyms += sym->nsyms;

      }

  return nsyms;

}

static long

bfd_mach_o_get_symtab_upper_bound (bfd *abfd)

{

  long nsyms = bfd_mach_o_count_symbols (abfd);

  if (nsyms < 0)

    return nsyms;

  return ((nsyms + 1) * sizeof (asymbol *));

}

static long

bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)

{

  bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;

  long nsyms = bfd_mach_o_count_symbols (abfd);

  asymbol **csym = alocation;

  unsigned long i, j;

  if (nsyms < 0)

    return nsyms;

  for (i = 0; i < mdata->header.ncmds; i++)

    {

      if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)

        {

          bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;

          if (bfd_mach_o_scan_read_symtab_symbols (abfd, &mdata->commands[i].command.symtab) != 0)

            {

              fprintf (stderr, "bfd_mach_o_canonicalize_symtab: unable to load symbols for section %lu\n", i);

              return 0;

            }

          BFD_ASSERT (sym->symbols != NULL);

          for (j = 0; j < sym->nsyms; j++)

            {

              BFD_ASSERT (csym < (alocation + nsyms));

              *csym++ = &sym->symbols[j];

            }

        }

    }

  *csym++ = NULL;

  return nsyms;

}

static void

bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,

                            asymbol *symbol,

                            symbol_info *ret)

{

  bfd_symbol_info (symbol, ret);

}

static void

bfd_mach_o_print_symbol (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);

    }

}

static void

bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,

                                 bfd_mach_o_cpu_subtype msubtype ATTRIBUTE_UNUSED,

                                 enum bfd_architecture *type,

                                 unsigned long *subtype)

{

  *subtype = bfd_arch_unknown;

  switch (mtype)

    {

    case BFD_MACH_O_CPU_TYPE_VAX: *type = bfd_arch_vax; break;

    case BFD_MACH_O_CPU_TYPE_MC680x0: *type = bfd_arch_m68k; break;

    case BFD_MACH_O_CPU_TYPE_I386: *type = bfd_arch_i386; break;

    case BFD_MACH_O_CPU_TYPE_MIPS: *type = bfd_arch_mips; break;

    case BFD_MACH_O_CPU_TYPE_MC98000: *type = bfd_arch_m98k; break;

    case BFD_MACH_O_CPU_TYPE_HPPA: *type = bfd_arch_hppa; break;

    case BFD_MACH_O_CPU_TYPE_ARM: *type = bfd_arch_arm; break;

    case BFD_MACH_O_CPU_TYPE_MC88000: *type = bfd_arch_m88k; break;

    case BFD_MACH_O_CPU_TYPE_SPARC: *type = bfd_arch_sparc; break;

    case BFD_MACH_O_CPU_TYPE_I860: *type = bfd_arch_i860; break;

    case BFD_MACH_O_CPU_TYPE_ALPHA: *type = bfd_arch_alpha; break;

    case BFD_MACH_O_CPU_TYPE_POWERPC: *type = bfd_arch_powerpc; break;

    default: *type = bfd_arch_unknown; break;

    }

  switch (*type)

    {

    case bfd_arch_i386: *subtype = bfd_mach_i386_i386; break;

    case bfd_arch_sparc: *subtype = bfd_mach_sparc; break;

    default:

      *subtype = bfd_arch_unknown;

    }

}

static int

bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header)

{

  unsigned char buf[28];

  bfd_h_put_32 (abfd, header->magic, buf + 0);

  bfd_h_put_32 (abfd, header->cputype, buf + 4);

  bfd_h_put_32 (abfd, header->cpusubtype, buf + 8);

  bfd_h_put_32 (abfd, header->filetype, buf + 12);

  bfd_h_put_32 (abfd, header->ncmds, buf + 16);

  bfd_h_put_32 (abfd, header->sizeofcmds, buf + 20);

  bfd_h_put_32 (abfd, header->flags, buf + 24);

  bfd_seek (abfd, 0, SEEK_SET);

  if (bfd_bwrite ((PTR) buf, 28, abfd) != 28)

    return -1;

  return 0;

}

static int

bfd_mach_o_scan_write_thread (bfd *abfd,

                              bfd_mach_o_load_command *command)

{

  bfd_mach_o_thread_command *cmd = &command->command.thread;

  unsigned int i;

  unsigned char buf[8];

  bfd_vma offset;

  unsigned int nflavours;

  BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)

              || (command->type == BFD_MACH_O_LC_UNIXTHREAD));

  offset = 8;

  nflavours = 0;

  for (i = 0; i < cmd->nflavours; i++)

    {

      BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);

      BFD_ASSERT (cmd->flavours[i].offset == (command->offset + offset + 8));

      bfd_h_put_32 (abfd, cmd->flavours[i].flavour, buf);

      bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), buf + 4);

      bfd_seek (abfd, command->offset + offset, SEEK_SET);

      if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)

        return -1;

      offset += cmd->flavours[i].size + 8;

    }

  return 0;

}

static int

bfd_mach_o_scan_write_section (bfd *abfd,

                               bfd_mach_o_section *section,

                               bfd_vma offset)

{

  unsigned char buf[68];

  memcpy (buf, section->sectname, 16);

  memcpy (buf + 16, section->segname, 16);

  bfd_h_put_32 (abfd, section->addr, buf + 32);

  bfd_h_put_32 (abfd, section->size, buf + 36);

  bfd_h_put_32 (abfd, section->offset, buf + 40);

  bfd_h_put_32 (abfd, section->align, buf + 44);

  bfd_h_put_32 (abfd, section->reloff, buf + 48);

  bfd_h_put_32 (abfd, section->nreloc, buf + 52);

  bfd_h_put_32 (abfd, section->flags, buf + 56);

  /* bfd_h_put_32 (abfd, section->reserved1, buf + 60); */

  /* bfd_h_put_32 (abfd, section->reserved2, buf + 64); */

  bfd_seek (abfd, offset, SEEK_SET);

  if (bfd_bwrite ((PTR) buf, 68, abfd) != 68)

    return -1;

  return 0;

}

static int

bfd_mach_o_scan_write_segment (bfd *abfd, bfd_mach_o_load_command *command)

{

  unsigned char buf[48];

  bfd_mach_o_segment_command *seg = &command->command.segment;

  unsigned long i;

  BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);

  memcpy (buf, seg->segname, 16);

  bfd_h_put_32 (abfd, seg->vmaddr, buf + 16);

  bfd_h_put_32 (abfd, seg->vmsize, buf + 20);

  bfd_h_put_32 (abfd, seg->fileoff, buf + 24);

  bfd_h_put_32 (abfd, seg->filesize, buf + 28);

  bfd_h_put_32 (abfd, 0 /* seg->maxprot */, buf + 32);

  bfd_h_put_32 (abfd, 0 /* seg->initprot */, buf + 36);

  bfd_h_put_32 (abfd, seg->nsects, buf + 40);

  bfd_h_put_32 (abfd, seg->flags, buf + 44);

  bfd_seek (abfd, command->offset + 8, SEEK_SET);

  if (bfd_bwrite ((PTR) buf, 48, abfd) != 48)

    return -1;

  {

    char buf[1024];

    bfd_vma nbytes = seg->filesize;

    bfd_vma curoff = seg->fileoff;

    while (nbytes > 0)

      {

        bfd_vma thisread = nbytes;

        if (thisread > 1024)

          thisread = 1024;

        bfd_seek (abfd, curoff, SEEK_SET);

        if (bfd_bread ((PTR) buf, thisread, abfd) != thisread)

          return -1;

        bfd_seek (abfd, curoff, SEEK_SET);

        if (bfd_bwrite ((PTR) buf, thisread, abfd) != thisread)

          return -1;

        nbytes -= thisread;

        curoff += thisread;

      }

  }

  for (i = 0; i < seg->nsects; i++)

    {

      bfd_vma segoff = command->offset + 48 + 8 + (i * 68);

      if (bfd_mach_o_scan_write_section (abfd, &seg->sections[i], segoff) != 0)

        return -1;

    }

  return 0;

}

static int

bfd_mach_o_scan_write_symtab_symbols (bfd *abfd,

                                      bfd_mach_o_load_command *command)

{

  bfd_mach_o_symtab_command *sym = &command->command.symtab;

  asymbol *s = NULL;

  unsigned long i;

  for (i = 0; i < sym->nsyms; i++)

    {

      unsigned char buf[12];

      bfd_vma symoff = sym->symoff + (i * 12);

      unsigned char ntype = 0;

      unsigned char nsect = 0;

      short ndesc = 0;

      s = &sym->symbols[i];

      /* Instead just set from the stored values.  */

      ntype = (s->udata.i >> 24) & 0xff;

      nsect = (s->udata.i >> 16) & 0xff;

      ndesc = s->udata.i & 0xffff;

      bfd_h_put_32 (abfd, s->name - sym->strtab, buf);

      bfd_h_put_8 (abfd, ntype, buf + 4);

      bfd_h_put_8 (abfd, nsect, buf + 5);

      bfd_h_put_16 (abfd, ndesc, buf + 6);

      bfd_h_put_32 (abfd, s->section->vma + s->value, buf + 8);

      bfd_seek (abfd, symoff, SEEK_SET);

      if (bfd_bwrite ((PTR) buf, 12, abfd) != 12)

        {

          fprintf (stderr, "bfd_mach_o_scan_write_symtab_symbols: unable to write %d bytes at %lu\n",

                   12, (unsigned long) symoff);

          return -1;

        }

    }

  return 0;

}

static int

bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)

{

  bfd_mach_o_symtab_command *seg = &command->command.symtab;

  unsigned char buf[16];

  BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);

  bfd_h_put_32 (abfd, seg->symoff, buf);

  bfd_h_put_32 (abfd, seg->nsyms, buf + 4);

  bfd_h_put_32 (abfd, seg->stroff, buf + 8);

  bfd_h_put_32 (abfd, seg->strsize, buf + 12);

  bfd_seek (abfd, command->offset + 8, SEEK_SET);

  if (bfd_bwrite ((PTR) buf, 16, abfd) != 16)

    return -1;

  if (bfd_mach_o_scan_write_symtab_symbols (abfd, command) != 0)

    return -1;

  return 0;

}

static bfd_boolean

bfd_mach_o_write_contents (bfd *abfd)

{

  unsigned int i;

  asection *s;

  bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;

  /* Write data sections first in case they overlap header data to be

     written later.  */

  for (s = abfd->sections; s != (asection *) NULL; s = s->next)

    ;

  /* Now write header information.  */

  if (bfd_mach_o_write_header (abfd, &mdata->header) != 0)

    return FALSE;

  for (i = 0; i < mdata->header.ncmds; i++)

    {

      unsigned char buf[8];

      bfd_mach_o_load_command *cur = &mdata->commands[i];

      unsigned long typeflag;

      typeflag = cur->type_required ? cur->type & BFD_MACH_O_LC_REQ_DYLD : cur->type;

      bfd_h_put_32 (abfd, typeflag, buf);

      bfd_h_put_32 (abfd, cur->len, buf + 4);

      bfd_seek (abfd, cur->offset, SEEK_SET);

      if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)

        return FALSE;

      switch (cur->type)

        {

        case BFD_MACH_O_LC_SEGMENT:

          if (bfd_mach_o_scan_write_segment (abfd, cur) != 0)

            return FALSE;

          break;

        case BFD_MACH_O_LC_SYMTAB:

          if (bfd_mach_o_scan_write_symtab (abfd, cur) != 0)

            return FALSE;

          break;

        case BFD_MACH_O_LC_SYMSEG:

          break;

        case BFD_MACH_O_LC_THREAD:

        case BFD_MACH_O_LC_UNIXTHREAD:

          if (bfd_mach_o_scan_write_thread (abfd, cur) != 0)

            return FALSE;

          break;

        case BFD_MACH_O_LC_LOADFVMLIB:

        case BFD_MACH_O_LC_IDFVMLIB:

        case BFD_MACH_O_LC_IDENT:

        case BFD_MACH_O_LC_FVMFILE:

        case BFD_MACH_O_LC_PREPAGE:

        case BFD_MACH_O_LC_DYSYMTAB:

        case BFD_MACH_O_LC_LOAD_DYLIB:

        case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:

        case BFD_MACH_O_LC_ID_DYLIB:

        case BFD_MACH_O_LC_LOAD_DYLINKER:

        case BFD_MACH_O_LC_ID_DYLINKER:

        case BFD_MACH_O_LC_PREBOUND_DYLIB:

        case BFD_MACH_O_LC_ROUTINES:

        case BFD_MACH_O_LC_SUB_FRAMEWORK:

          break;

        default:

          fprintf (stderr,

                   "unable to write unknown load command 0x%lx\n",

                   (long) cur->type);

          return FALSE;

        }

    }

  return TRUE;

}

static int

bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,

                           struct bfd_link_info *info ATTRIBUTE_UNUSED)

{

  return 0;

}

/* Make an empty symbol.  This is required only because

   bfd_make_section_anyway wants to create a symbol for the section.  */

static asymbol *

bfd_mach_o_make_empty_symbol (bfd *abfd)

{

  asymbol *new;

  new = bfd_zalloc (abfd, sizeof (* new));

  if (new == NULL)

    return new;

  new->the_bfd = abfd;

  return new;

}

static int

bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header)

{

  unsigned char buf[28];

  bfd_vma (*get32) (const void *) = NULL;

  bfd_seek (abfd, 0, SEEK_SET);

  if (bfd_bread ((PTR) buf, 28, abfd) != 28)

    return -1;

  if (bfd_getb32 (buf) == 0xfeedface)

    {

      header->byteorder = BFD_ENDIAN_BIG;

      header->magic = 0xfeedface;

      get32 = bfd_getb32;

    }

  else if (bfd_getl32 (buf) == 0xfeedface)

    {

      header->byteorder = BFD_ENDIAN_LITTLE;

      header->magic = 0xfeedface;

      get32 = bfd_getl32;

    }

  else

    {

      header->byteorder = BFD_ENDIAN_UNKNOWN;

      return -1;

    }

  header->cputype = (*get32) (buf + 4);

  header->cpusubtype = (*get32) (buf + 8);

  header->filetype = (*get32) (buf + 12);

  header->ncmds = (*get32) (buf + 16);

  header->sizeofcmds = (*get32) (buf + 20);

  header->flags = (*get32) (buf + 24);

  return 0;

}

static asection *

bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section)

{

  asection *bfdsec;

  char *sname;

  const char *prefix = "LC_SEGMENT";

  unsigned int snamelen;

  flagword flags;

  snamelen = strlen (prefix) + 1

    + strlen (section->segname) + 1

    + strlen (section->sectname) + 1;

  sname = bfd_alloc (abfd, snamelen);

  if (sname == NULL)

    return NULL;

  sprintf (sname, "%s.%s.%s", prefix, section->segname, section->sectname);

  flags = SEC_ALLOC;

  if ((section->flags & SECTION_TYPE) != BFD_MACH_O_S_ZEROFILL)

    flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;

  bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, flags);

  if (bfdsec == NULL)

    return NULL;