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  1. /* Support for the generic parts of COFF, for BFD.
  2.    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
  3.    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
  4.    Free Software Foundation, Inc.
  5.    Written by Cygnus Support.
  6.  
  7.    This file is part of BFD, the Binary File Descriptor library.
  8.  
  9.    This program is free software; you can redistribute it and/or modify
  10.    it under the terms of the GNU General Public License as published by
  11.    the Free Software Foundation; either version 3 of the License, or
  12.    (at your option) any later version.
  13.  
  14.    This program is distributed in the hope that it will be useful,
  15.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17.    GNU General Public License for more details.
  18.  
  19.    You should have received a copy of the GNU General Public License
  20.    along with this program; if not, write to the Free Software
  21.    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22.    MA 02110-1301, USA.  */
  23.  
  24. /* Most of this hacked by  Steve Chamberlain, sac@cygnus.com.
  25.    Split out of coffcode.h by Ian Taylor, ian@cygnus.com.  */
  26.  
  27. /* This file contains COFF code that is not dependent on any
  28.    particular COFF target.  There is only one version of this file in
  29.    libbfd.a, so no target specific code may be put in here.  Or, to
  30.    put it another way,
  31.  
  32.    ********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE **********
  33.  
  34.    If you need to add some target specific behaviour, add a new hook
  35.    function to bfd_coff_backend_data.
  36.  
  37.    Some of these functions are also called by the ECOFF routines.
  38.    Those functions may not use any COFF specific information, such as
  39.    coff_data (abfd).  */
  40.  
  41. #include "sysdep.h"
  42. #include "bfd.h"
  43. #include "libbfd.h"
  44. #include "coff/internal.h"
  45. #include "libcoff.h"
  46.  
  47. /* Take a section header read from a coff file (in HOST byte order),
  48.    and make a BFD "section" out of it.  This is used by ECOFF.  */
  49.  
  50. static bfd_boolean
  51. make_a_section_from_file (bfd *abfd,
  52.                           struct internal_scnhdr *hdr,
  53.                           unsigned int target_index)
  54. {
  55.   asection *return_section;
  56.   char *name;
  57.   bfd_boolean result = TRUE;
  58.   flagword flags;
  59.  
  60.   name = NULL;
  61.  
  62.   /* Handle long section names as in PE.  On reading, we want to
  63.     accept long names if the format permits them at all, regardless
  64.     of the current state of the flag that dictates if we would generate
  65.     them in outputs; this construct checks if that is the case by
  66.     attempting to set the flag, without changing its state; the call
  67.     will fail for formats that do not support long names at all.  */
  68.   if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd))
  69.       && hdr->s_name[0] == '/')
  70.     {
  71.       char buf[SCNNMLEN];
  72.       long strindex;
  73.       char *p;
  74.       const char *strings;
  75.  
  76.       /* Flag that this BFD uses long names, even though the format might
  77.          expect them to be off by default.  This won't directly affect the
  78.          format of any output BFD created from this one, but the information
  79.          can be used to decide what to do.  */
  80.       bfd_coff_set_long_section_names (abfd, TRUE);
  81.       memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1);
  82.       buf[SCNNMLEN - 1] = '\0';
  83.       strindex = strtol (buf, &p, 10);
  84.       if (*p == '\0' && strindex >= 0)
  85.         {
  86.           strings = _bfd_coff_read_string_table (abfd);
  87.           if (strings == NULL)
  88.             return FALSE;
  89.           /* FIXME: For extra safety, we should make sure that
  90.              strindex does not run us past the end, but right now we
  91.              don't know the length of the string table.  */
  92.           strings += strindex;
  93.           name = (char *) bfd_alloc (abfd,
  94.                                      (bfd_size_type) strlen (strings) + 1 + 1);
  95.           if (name == NULL)
  96.             return FALSE;
  97.           strcpy (name, strings);
  98.         }
  99.     }
  100.  
  101.   if (name == NULL)
  102.     {
  103.       /* Assorted wastage to null-terminate the name, thanks AT&T! */
  104.       name = (char *) bfd_alloc (abfd,
  105.                                  (bfd_size_type) sizeof (hdr->s_name) + 1 + 1);
  106.       if (name == NULL)
  107.         return FALSE;
  108.       strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name));
  109.       name[sizeof (hdr->s_name)] = 0;
  110.     }
  111.  
  112.   return_section = bfd_make_section_anyway (abfd, name);
  113.   if (return_section == NULL)
  114.     return FALSE;
  115.  
  116.   return_section->vma = hdr->s_vaddr;
  117.   return_section->lma = hdr->s_paddr;
  118.   return_section->size = hdr->s_size;
  119.   return_section->filepos = hdr->s_scnptr;
  120.   return_section->rel_filepos = hdr->s_relptr;
  121.   return_section->reloc_count = hdr->s_nreloc;
  122.  
  123.   bfd_coff_set_alignment_hook (abfd, return_section, hdr);
  124.  
  125.   return_section->line_filepos = hdr->s_lnnoptr;
  126.  
  127.   return_section->lineno_count = hdr->s_nlnno;
  128.   return_section->userdata = NULL;
  129.   return_section->next = NULL;
  130.   return_section->target_index = target_index;
  131.  
  132.   if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section,
  133.                                          & flags))
  134.     result = FALSE;
  135.  
  136.   return_section->flags = flags;
  137.  
  138.   /* At least on i386-coff, the line number count for a shared library
  139.      section must be ignored.  */
  140.   if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0)
  141.     return_section->lineno_count = 0;
  142.  
  143.   if (hdr->s_nreloc != 0)
  144.     return_section->flags |= SEC_RELOC;
  145.   /* FIXME: should this check 'hdr->s_size > 0'.  */
  146.   if (hdr->s_scnptr != 0)
  147.     return_section->flags |= SEC_HAS_CONTENTS;
  148.  
  149.   /* Compress/decompress DWARF debug sections with names: .debug_* and
  150.      .zdebug_*, after the section flags is set.  */
  151.   if ((flags & SEC_DEBUGGING)
  152.       && ((name[1] == 'd' && name[6] == '_')
  153.           || (name[1] == 'z' && name[7] == '_')))
  154.     {
  155.       enum { nothing, compress, decompress } action = nothing;
  156.       char *new_name = NULL;
  157.  
  158.       if (bfd_is_section_compressed (abfd, return_section))
  159.         {
  160.           /* Compressed section.  Check if we should decompress.  */
  161.           if ((abfd->flags & BFD_DECOMPRESS))
  162.             action = decompress;
  163.         }
  164.       else if (!bfd_is_section_compressed (abfd, return_section))
  165.         {
  166.           /* Normal section.  Check if we should compress.  */
  167.           if ((abfd->flags & BFD_COMPRESS) && return_section->size != 0)
  168.             action = compress;
  169.         }
  170.  
  171.       switch (action)
  172.         {
  173.         case nothing:
  174.           break;
  175.         case compress:
  176.           if (!bfd_init_section_compress_status (abfd, return_section))
  177.             {
  178.               (*_bfd_error_handler)
  179.                 (_("%B: unable to initialize compress status for section %s"),
  180.                  abfd, name);
  181.               return FALSE;
  182.             }
  183.           if (name[1] != 'z')
  184.             {
  185.               unsigned int len = strlen (name);
  186.  
  187.               new_name = bfd_alloc (abfd, len + 2);
  188.               if (new_name == NULL)
  189.                 return FALSE;
  190.               new_name[0] = '.';
  191.               new_name[1] = 'z';
  192.               memcpy (new_name + 2, name + 1, len);
  193.             }
  194.           break;
  195.         case decompress:
  196.           if (!bfd_init_section_decompress_status (abfd, return_section))
  197.             {
  198.               (*_bfd_error_handler)
  199.                 (_("%B: unable to initialize decompress status for section %s"),
  200.                  abfd, name);
  201.               return FALSE;
  202.             }
  203.           if (name[1] == 'z')
  204.             {
  205.               unsigned int len = strlen (name);
  206.  
  207.               new_name = bfd_alloc (abfd, len);
  208.               if (new_name == NULL)
  209.                 return FALSE;
  210.               new_name[0] = '.';
  211.               memcpy (new_name + 1, name + 2, len - 1);
  212.             }
  213.           break;
  214.         }
  215.       if (new_name != NULL)
  216.         bfd_rename_section (abfd, return_section, new_name);
  217.     }
  218.  
  219.   return result;
  220. }
  221.  
  222. /* Read in a COFF object and make it into a BFD.  This is used by
  223.    ECOFF as well.  */
  224. const bfd_target *
  225. coff_real_object_p (bfd *,
  226.                     unsigned,
  227.                     struct internal_filehdr *,
  228.                     struct internal_aouthdr *);
  229. const bfd_target *
  230. coff_real_object_p (bfd *abfd,
  231.                     unsigned nscns,
  232.                     struct internal_filehdr *internal_f,
  233.                     struct internal_aouthdr *internal_a)
  234. {
  235.   flagword oflags = abfd->flags;
  236.   bfd_vma ostart = bfd_get_start_address (abfd);
  237.   void * tdata;
  238.   void * tdata_save;
  239.   bfd_size_type readsize;       /* Length of file_info.  */
  240.   unsigned int scnhsz;
  241.   char *external_sections;
  242.  
  243.   if (!(internal_f->f_flags & F_RELFLG))
  244.     abfd->flags |= HAS_RELOC;
  245.   if ((internal_f->f_flags & F_EXEC))
  246.     abfd->flags |= EXEC_P;
  247.   if (!(internal_f->f_flags & F_LNNO))
  248.     abfd->flags |= HAS_LINENO;
  249.   if (!(internal_f->f_flags & F_LSYMS))
  250.     abfd->flags |= HAS_LOCALS;
  251.  
  252.   /* FIXME: How can we set D_PAGED correctly?  */
  253.   if ((internal_f->f_flags & F_EXEC) != 0)
  254.     abfd->flags |= D_PAGED;
  255.  
  256.   bfd_get_symcount (abfd) = internal_f->f_nsyms;
  257.   if (internal_f->f_nsyms)
  258.     abfd->flags |= HAS_SYMS;
  259.  
  260.   if (internal_a != (struct internal_aouthdr *) NULL)
  261.     bfd_get_start_address (abfd) = internal_a->entry;
  262.   else
  263.     bfd_get_start_address (abfd) = 0;
  264.  
  265.   /* Set up the tdata area.  ECOFF uses its own routine, and overrides
  266.      abfd->flags.  */
  267.   tdata_save = abfd->tdata.any;
  268.   tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a);
  269.   if (tdata == NULL)
  270.     goto fail2;
  271.  
  272.   scnhsz = bfd_coff_scnhsz (abfd);
  273.   readsize = (bfd_size_type) nscns * scnhsz;
  274.   external_sections = (char *) bfd_alloc (abfd, readsize);
  275.   if (!external_sections)
  276.     goto fail;
  277.  
  278.   if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize)
  279.     goto fail;
  280.  
  281.   /* Set the arch/mach *before* swapping in sections; section header swapping
  282.      may depend on arch/mach info.  */
  283.   if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f))
  284.     goto fail;
  285.  
  286.   /* Now copy data as required; construct all asections etc.  */
  287.   if (nscns != 0)
  288.     {
  289.       unsigned int i;
  290.       for (i = 0; i < nscns; i++)
  291.         {
  292.           struct internal_scnhdr tmp;
  293.           bfd_coff_swap_scnhdr_in (abfd,
  294.                                    (void *) (external_sections + i * scnhsz),
  295.                                    (void *) & tmp);
  296.           if (! make_a_section_from_file (abfd, &tmp, i + 1))
  297.             goto fail;
  298.         }
  299.     }
  300.  
  301.   return abfd->xvec;
  302.  
  303.  fail:
  304.   bfd_release (abfd, tdata);
  305.  fail2:
  306.   abfd->tdata.any = tdata_save;
  307.   abfd->flags = oflags;
  308.   bfd_get_start_address (abfd) = ostart;
  309.   return (const bfd_target *) NULL;
  310. }
  311.  
  312. /* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is
  313.    not a COFF file.  This is also used by ECOFF.  */
  314.  
  315. const bfd_target *
  316. coff_object_p (bfd *abfd)
  317. {
  318.   bfd_size_type filhsz;
  319.   bfd_size_type aoutsz;
  320.   unsigned int nscns;
  321.   void * filehdr;
  322.   struct internal_filehdr internal_f;
  323.   struct internal_aouthdr internal_a;
  324.  
  325.   /* Figure out how much to read.  */
  326.   filhsz = bfd_coff_filhsz (abfd);
  327.   aoutsz = bfd_coff_aoutsz (abfd);
  328.  
  329.   filehdr = bfd_alloc (abfd, filhsz);
  330.   if (filehdr == NULL)
  331.     return NULL;
  332.   if (bfd_bread (filehdr, filhsz, abfd) != filhsz)
  333.     {
  334.       if (bfd_get_error () != bfd_error_system_call)
  335.         bfd_set_error (bfd_error_wrong_format);
  336.       bfd_release (abfd, filehdr);
  337.       return NULL;
  338.     }
  339.   bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f);
  340.   bfd_release (abfd, filehdr);
  341.  
  342.   /* The XCOFF format has two sizes for the f_opthdr.  SMALL_AOUTSZ
  343.      (less than aoutsz) used in object files and AOUTSZ (equal to
  344.      aoutsz) in executables.  The bfd_coff_swap_aouthdr_in function
  345.      expects this header to be aoutsz bytes in length, so we use that
  346.      value in the call to bfd_alloc below.  But we must be careful to
  347.      only read in f_opthdr bytes in the call to bfd_bread.  We should
  348.      also attempt to catch corrupt or non-COFF binaries with a strange
  349.      value for f_opthdr.  */
  350.   if (! bfd_coff_bad_format_hook (abfd, &internal_f)
  351.       || internal_f.f_opthdr > aoutsz)
  352.     {
  353.       bfd_set_error (bfd_error_wrong_format);
  354.       return NULL;
  355.     }
  356.   nscns = internal_f.f_nscns;
  357.  
  358.   if (internal_f.f_opthdr)
  359.     {
  360.       void * opthdr;
  361.  
  362.       opthdr = bfd_alloc (abfd, aoutsz);
  363.       if (opthdr == NULL)
  364.         return NULL;
  365.       if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd)
  366.           != internal_f.f_opthdr)
  367.         {
  368.           bfd_release (abfd, opthdr);
  369.           return NULL;
  370.         }
  371.       bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a);
  372.       bfd_release (abfd, opthdr);
  373.     }
  374.  
  375.   return coff_real_object_p (abfd, nscns, &internal_f,
  376.                              (internal_f.f_opthdr != 0
  377.                               ? &internal_a
  378.                               : (struct internal_aouthdr *) NULL));
  379. }
  380.  
  381. /* Get the BFD section from a COFF symbol section number.  */
  382.  
  383. asection *
  384. coff_section_from_bfd_index (bfd *abfd, int section_index)
  385. {
  386.   struct bfd_section *answer = abfd->sections;
  387.  
  388.   if (section_index == N_ABS)
  389.     return bfd_abs_section_ptr;
  390.   if (section_index == N_UNDEF)
  391.     return bfd_und_section_ptr;
  392.   if (section_index == N_DEBUG)
  393.     return bfd_abs_section_ptr;
  394.  
  395.   while (answer)
  396.     {
  397.       if (answer->target_index == section_index)
  398.         return answer;
  399.       answer = answer->next;
  400.     }
  401.  
  402.   /* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a
  403.      has a bad symbol table in biglitpow.o.  */
  404.   return bfd_und_section_ptr;
  405. }
  406.  
  407. /* Get the upper bound of a COFF symbol table.  */
  408.  
  409. long
  410. coff_get_symtab_upper_bound (bfd *abfd)
  411. {
  412.   if (!bfd_coff_slurp_symbol_table (abfd))
  413.     return -1;
  414.  
  415.   return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *));
  416. }
  417.  
  418. /* Canonicalize a COFF symbol table.  */
  419.  
  420. long
  421. coff_canonicalize_symtab (bfd *abfd, asymbol **alocation)
  422. {
  423.   unsigned int counter;
  424.   coff_symbol_type *symbase;
  425.   coff_symbol_type **location = (coff_symbol_type **) alocation;
  426.  
  427.   if (!bfd_coff_slurp_symbol_table (abfd))
  428.     return -1;
  429.  
  430.   symbase = obj_symbols (abfd);
  431.   counter = bfd_get_symcount (abfd);
  432.   while (counter-- > 0)
  433.     *location++ = symbase++;
  434.  
  435.   *location = NULL;
  436.  
  437.   return bfd_get_symcount (abfd);
  438. }
  439.  
  440. /* Get the name of a symbol.  The caller must pass in a buffer of size
  441.    >= SYMNMLEN + 1.  */
  442.  
  443. const char *
  444. _bfd_coff_internal_syment_name (bfd *abfd,
  445.                                 const struct internal_syment *sym,
  446.                                 char *buf)
  447. {
  448.   /* FIXME: It's not clear this will work correctly if sizeof
  449.      (_n_zeroes) != 4.  */
  450.   if (sym->_n._n_n._n_zeroes != 0
  451.       || sym->_n._n_n._n_offset == 0)
  452.     {
  453.       memcpy (buf, sym->_n._n_name, SYMNMLEN);
  454.       buf[SYMNMLEN] = '\0';
  455.       return buf;
  456.     }
  457.   else
  458.     {
  459.       const char *strings;
  460.  
  461.       BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE);
  462.       strings = obj_coff_strings (abfd);
  463.       if (strings == NULL)
  464.         {
  465.           strings = _bfd_coff_read_string_table (abfd);
  466.           if (strings == NULL)
  467.             return NULL;
  468.         }
  469.       return strings + sym->_n._n_n._n_offset;
  470.     }
  471. }
  472.  
  473. /* Read in and swap the relocs.  This returns a buffer holding the
  474.    relocs for section SEC in file ABFD.  If CACHE is TRUE and
  475.    INTERNAL_RELOCS is NULL, the relocs read in will be saved in case
  476.    the function is called again.  If EXTERNAL_RELOCS is not NULL, it
  477.    is a buffer large enough to hold the unswapped relocs.  If
  478.    INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold
  479.    the swapped relocs.  If REQUIRE_INTERNAL is TRUE, then the return
  480.    value must be INTERNAL_RELOCS.  The function returns NULL on error.  */
  481.  
  482. struct internal_reloc *
  483. _bfd_coff_read_internal_relocs (bfd *abfd,
  484.                                 asection *sec,
  485.                                 bfd_boolean cache,
  486.                                 bfd_byte *external_relocs,
  487.                                 bfd_boolean require_internal,
  488.                                 struct internal_reloc *internal_relocs)
  489. {
  490.   bfd_size_type relsz;
  491.   bfd_byte *free_external = NULL;
  492.   struct internal_reloc *free_internal = NULL;
  493.   bfd_byte *erel;
  494.   bfd_byte *erel_end;
  495.   struct internal_reloc *irel;
  496.   bfd_size_type amt;
  497.  
  498.   if (sec->reloc_count == 0)
  499.     return internal_relocs;     /* Nothing to do.  */
  500.  
  501.   if (coff_section_data (abfd, sec) != NULL
  502.       && coff_section_data (abfd, sec)->relocs != NULL)
  503.     {
  504.       if (! require_internal)
  505.         return coff_section_data (abfd, sec)->relocs;
  506.       memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs,
  507.               sec->reloc_count * sizeof (struct internal_reloc));
  508.       return internal_relocs;
  509.     }
  510.  
  511.   relsz = bfd_coff_relsz (abfd);
  512.  
  513.   amt = sec->reloc_count * relsz;
  514.   if (external_relocs == NULL)
  515.     {
  516.       free_external = (bfd_byte *) bfd_malloc (amt);
  517.       if (free_external == NULL)
  518.         goto error_return;
  519.       external_relocs = free_external;
  520.     }
  521.  
  522.   if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0
  523.       || bfd_bread (external_relocs, amt, abfd) != amt)
  524.     goto error_return;
  525.  
  526.   if (internal_relocs == NULL)
  527.     {
  528.       amt = sec->reloc_count;
  529.       amt *= sizeof (struct internal_reloc);
  530.       free_internal = (struct internal_reloc *) bfd_malloc (amt);
  531.       if (free_internal == NULL)
  532.         goto error_return;
  533.       internal_relocs = free_internal;
  534.     }
  535.  
  536.   /* Swap in the relocs.  */
  537.   erel = external_relocs;
  538.   erel_end = erel + relsz * sec->reloc_count;
  539.   irel = internal_relocs;
  540.   for (; erel < erel_end; erel += relsz, irel++)
  541.     bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel);
  542.  
  543.   if (free_external != NULL)
  544.     {
  545.       free (free_external);
  546.       free_external = NULL;
  547.     }
  548.  
  549.   if (cache && free_internal != NULL)
  550.     {
  551.       if (coff_section_data (abfd, sec) == NULL)
  552.         {
  553.           amt = sizeof (struct coff_section_tdata);
  554.           sec->used_by_bfd = bfd_zalloc (abfd, amt);
  555.           if (sec->used_by_bfd == NULL)
  556.             goto error_return;
  557.           coff_section_data (abfd, sec)->contents = NULL;
  558.         }
  559.       coff_section_data (abfd, sec)->relocs = free_internal;
  560.     }
  561.  
  562.   return internal_relocs;
  563.  
  564.  error_return:
  565.   if (free_external != NULL)
  566.     free (free_external);
  567.   if (free_internal != NULL)
  568.     free (free_internal);
  569.   return NULL;
  570. }
  571.  
  572. /* Set lineno_count for the output sections of a COFF file.  */
  573.  
  574. int
  575. coff_count_linenumbers (bfd *abfd)
  576. {
  577.   unsigned int limit = bfd_get_symcount (abfd);
  578.   unsigned int i;
  579.   int total = 0;
  580.   asymbol **p;
  581.   asection *s;
  582.  
  583.   if (limit == 0)
  584.     {
  585.       /* This may be from the backend linker, in which case the
  586.          lineno_count in the sections is correct.  */
  587.       for (s = abfd->sections; s != NULL; s = s->next)
  588.         total += s->lineno_count;
  589.       return total;
  590.     }
  591.  
  592.   for (s = abfd->sections; s != NULL; s = s->next)
  593.     BFD_ASSERT (s->lineno_count == 0);
  594.  
  595.   for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
  596.     {
  597.       asymbol *q_maybe = *p;
  598.  
  599.       if (bfd_family_coff (bfd_asymbol_bfd (q_maybe)))
  600.         {
  601.           coff_symbol_type *q = coffsymbol (q_maybe);
  602.  
  603.           /* The AIX 4.1 compiler can sometimes generate line numbers
  604.              attached to debugging symbols.  We try to simply ignore
  605.              those here.  */
  606.           if (q->lineno != NULL
  607.               && q->symbol.section->owner != NULL)
  608.             {
  609.               /* This symbol has line numbers.  Increment the owning
  610.                  section's linenumber count.  */
  611.               alent *l = q->lineno;
  612.  
  613.               do
  614.                 {
  615.                   asection * sec = q->symbol.section->output_section;
  616.  
  617.                   /* Do not try to update fields in read-only sections.  */
  618.                   if (! bfd_is_const_section (sec))
  619.                     sec->lineno_count ++;
  620.  
  621.                   ++total;
  622.                   ++l;
  623.                 }
  624.               while (l->line_number != 0);
  625.             }
  626.         }
  627.     }
  628.  
  629.   return total;
  630. }
  631.  
  632. /* Takes a bfd and a symbol, returns a pointer to the coff specific
  633.    area of the symbol if there is one.  */
  634.  
  635. coff_symbol_type *
  636. coff_symbol_from (bfd *ignore_abfd ATTRIBUTE_UNUSED,
  637.                   asymbol *symbol)
  638. {
  639.   if (!bfd_family_coff (bfd_asymbol_bfd (symbol)))
  640.     return (coff_symbol_type *) NULL;
  641.  
  642.   if (bfd_asymbol_bfd (symbol)->tdata.coff_obj_data == (coff_data_type *) NULL)
  643.     return (coff_symbol_type *) NULL;
  644.  
  645.   return (coff_symbol_type *) symbol;
  646. }
  647.  
  648. static void
  649. fixup_symbol_value (bfd *abfd,
  650.                     coff_symbol_type *coff_symbol_ptr,
  651.                     struct internal_syment *syment)
  652. {
  653.   /* Normalize the symbol flags.  */
  654.   if (coff_symbol_ptr->symbol.section
  655.       && bfd_is_com_section (coff_symbol_ptr->symbol.section))
  656.     {
  657.       /* A common symbol is undefined with a value.  */
  658.       syment->n_scnum = N_UNDEF;
  659.       syment->n_value = coff_symbol_ptr->symbol.value;
  660.     }
  661.   else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0
  662.            && (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0)
  663.     {
  664.       syment->n_value = coff_symbol_ptr->symbol.value;
  665.     }
  666.   else if (bfd_is_und_section (coff_symbol_ptr->symbol.section))
  667.     {
  668.       syment->n_scnum = N_UNDEF;
  669.       syment->n_value = 0;
  670.     }
  671.   /* FIXME: Do we need to handle the absolute section here?  */
  672.   else
  673.     {
  674.       if (coff_symbol_ptr->symbol.section)
  675.         {
  676.           syment->n_scnum =
  677.             coff_symbol_ptr->symbol.section->output_section->target_index;
  678.  
  679.           syment->n_value = (coff_symbol_ptr->symbol.value
  680.                              + coff_symbol_ptr->symbol.section->output_offset);
  681.           if (! obj_pe (abfd))
  682.             {
  683.               syment->n_value += (syment->n_sclass == C_STATLAB)
  684.                 ? coff_symbol_ptr->symbol.section->output_section->lma
  685.                 : coff_symbol_ptr->symbol.section->output_section->vma;
  686.             }
  687.         }
  688.       else
  689.         {
  690.           BFD_ASSERT (0);
  691.           /* This can happen, but I don't know why yet (steve@cygnus.com) */
  692.           syment->n_scnum = N_ABS;
  693.           syment->n_value = coff_symbol_ptr->symbol.value;
  694.         }
  695.     }
  696. }
  697.  
  698. /* Run through all the symbols in the symbol table and work out what
  699.    their indexes into the symbol table will be when output.
  700.  
  701.    Coff requires that each C_FILE symbol points to the next one in the
  702.    chain, and that the last one points to the first external symbol. We
  703.    do that here too.  */
  704.  
  705. bfd_boolean
  706. coff_renumber_symbols (bfd *bfd_ptr, int *first_undef)
  707. {
  708.   unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
  709.   asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
  710.   unsigned int native_index = 0;
  711.   struct internal_syment *last_file = NULL;
  712.   unsigned int symbol_index;
  713.  
  714.   /* COFF demands that undefined symbols come after all other symbols.
  715.      Since we don't need to impose this extra knowledge on all our
  716.      client programs, deal with that here.  Sort the symbol table;
  717.      just move the undefined symbols to the end, leaving the rest
  718.      alone.  The O'Reilly book says that defined global symbols come
  719.      at the end before the undefined symbols, so we do that here as
  720.      well.  */
  721.   /* @@ Do we have some condition we could test for, so we don't always
  722.      have to do this?  I don't think relocatability is quite right, but
  723.      I'm not certain.  [raeburn:19920508.1711EST]  */
  724.   {
  725.     asymbol **newsyms;
  726.     unsigned int i;
  727.     bfd_size_type amt;
  728.  
  729.     amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1);
  730.     newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt);
  731.     if (!newsyms)
  732.       return FALSE;
  733.     bfd_ptr->outsymbols = newsyms;
  734.     for (i = 0; i < symbol_count; i++)
  735.       if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0
  736.           || (!bfd_is_und_section (symbol_ptr_ptr[i]->section)
  737.               && !bfd_is_com_section (symbol_ptr_ptr[i]->section)
  738.               && ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0
  739.                   || ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
  740.                       == 0))))
  741.         *newsyms++ = symbol_ptr_ptr[i];
  742.  
  743.     for (i = 0; i < symbol_count; i++)
  744.       if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
  745.           && !bfd_is_und_section (symbol_ptr_ptr[i]->section)
  746.           && (bfd_is_com_section (symbol_ptr_ptr[i]->section)
  747.               || ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0
  748.                   && ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK))
  749.                       != 0))))
  750.         *newsyms++ = symbol_ptr_ptr[i];
  751.  
  752.     *first_undef = newsyms - bfd_ptr->outsymbols;
  753.  
  754.     for (i = 0; i < symbol_count; i++)
  755.       if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0
  756.           && bfd_is_und_section (symbol_ptr_ptr[i]->section))
  757.         *newsyms++ = symbol_ptr_ptr[i];
  758.     *newsyms = (asymbol *) NULL;
  759.     symbol_ptr_ptr = bfd_ptr->outsymbols;
  760.   }
  761.  
  762.   for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
  763.     {
  764.       coff_symbol_type *coff_symbol_ptr = coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
  765.       symbol_ptr_ptr[symbol_index]->udata.i = symbol_index;
  766.       if (coff_symbol_ptr && coff_symbol_ptr->native)
  767.         {
  768.           combined_entry_type *s = coff_symbol_ptr->native;
  769.           int i;
  770.  
  771.           if (s->u.syment.n_sclass == C_FILE)
  772.             {
  773.               if (last_file != NULL)
  774.                 last_file->n_value = native_index;
  775.               last_file = &(s->u.syment);
  776.             }
  777.           else
  778.             /* Modify the symbol values according to their section and
  779.                type.  */
  780.             fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment));
  781.  
  782.           for (i = 0; i < s->u.syment.n_numaux + 1; i++)
  783.             s[i].offset = native_index++;
  784.         }
  785.       else
  786.         native_index++;
  787.     }
  788.  
  789.   obj_conv_table_size (bfd_ptr) = native_index;
  790.  
  791.   return TRUE;
  792. }
  793.  
  794. /* Run thorough the symbol table again, and fix it so that all
  795.    pointers to entries are changed to the entries' index in the output
  796.    symbol table.  */
  797.  
  798. void
  799. coff_mangle_symbols (bfd *bfd_ptr)
  800. {
  801.   unsigned int symbol_count = bfd_get_symcount (bfd_ptr);
  802.   asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols;
  803.   unsigned int symbol_index;
  804.  
  805.   for (symbol_index = 0; symbol_index < symbol_count; symbol_index++)
  806.     {
  807.       coff_symbol_type *coff_symbol_ptr =
  808.       coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]);
  809.  
  810.       if (coff_symbol_ptr && coff_symbol_ptr->native)
  811.         {
  812.           int i;
  813.           combined_entry_type *s = coff_symbol_ptr->native;
  814.  
  815.           if (s->fix_value)
  816.             {
  817.               /* FIXME: We should use a union here.  */
  818.               s->u.syment.n_value =
  819.                 (bfd_hostptr_t) ((combined_entry_type *)
  820.                           ((bfd_hostptr_t) s->u.syment.n_value))->offset;
  821.               s->fix_value = 0;
  822.             }
  823.           if (s->fix_line)
  824.             {
  825.               /* The value is the offset into the line number entries
  826.                  for the symbol's section.  On output, the symbol's
  827.                  section should be N_DEBUG.  */
  828.               s->u.syment.n_value =
  829.                 (coff_symbol_ptr->symbol.section->output_section->line_filepos
  830.                  + s->u.syment.n_value * bfd_coff_linesz (bfd_ptr));
  831.               coff_symbol_ptr->symbol.section =
  832.                 coff_section_from_bfd_index (bfd_ptr, N_DEBUG);
  833.               BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING);
  834.             }
  835.           for (i = 0; i < s->u.syment.n_numaux; i++)
  836.             {
  837.               combined_entry_type *a = s + i + 1;
  838.               if (a->fix_tag)
  839.                 {
  840.                   a->u.auxent.x_sym.x_tagndx.l =
  841.                     a->u.auxent.x_sym.x_tagndx.p->offset;
  842.                   a->fix_tag = 0;
  843.                 }
  844.               if (a->fix_end)
  845.                 {
  846.                   a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l =
  847.                     a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset;
  848.                   a->fix_end = 0;
  849.                 }
  850.               if (a->fix_scnlen)
  851.                 {
  852.                   a->u.auxent.x_csect.x_scnlen.l =
  853.                     a->u.auxent.x_csect.x_scnlen.p->offset;
  854.                   a->fix_scnlen = 0;
  855.                 }
  856.             }
  857.         }
  858.     }
  859. }
  860.  
  861. static void
  862. coff_fix_symbol_name (bfd *abfd,
  863.                       asymbol *symbol,
  864.                       combined_entry_type *native,
  865.                       bfd_size_type *string_size_p,
  866.                       asection **debug_string_section_p,
  867.                       bfd_size_type *debug_string_size_p)
  868. {
  869.   unsigned int name_length;
  870.   union internal_auxent *auxent;
  871.   char *name = (char *) (symbol->name);
  872.  
  873.   if (name == NULL)
  874.     {
  875.       /* COFF symbols always have names, so we'll make one up.  */
  876.       symbol->name = "strange";
  877.       name = (char *) symbol->name;
  878.     }
  879.   name_length = strlen (name);
  880.  
  881.   if (native->u.syment.n_sclass == C_FILE
  882.       && native->u.syment.n_numaux > 0)
  883.     {
  884.       unsigned int filnmlen;
  885.  
  886.       if (bfd_coff_force_symnames_in_strings (abfd))
  887.         {
  888.           native->u.syment._n._n_n._n_offset =
  889.               (*string_size_p + STRING_SIZE_SIZE);
  890.           native->u.syment._n._n_n._n_zeroes = 0;
  891.           *string_size_p += 6;  /* strlen(".file") + 1 */
  892.         }
  893.       else
  894.         strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN);
  895.  
  896.       auxent = &(native + 1)->u.auxent;
  897.  
  898.       filnmlen = bfd_coff_filnmlen (abfd);
  899.  
  900.       if (bfd_coff_long_filenames (abfd))
  901.         {
  902.           if (name_length <= filnmlen)
  903.             strncpy (auxent->x_file.x_fname, name, filnmlen);
  904.           else
  905.             {
  906.               auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE;
  907.               auxent->x_file.x_n.x_zeroes = 0;
  908.               *string_size_p += name_length + 1;
  909.             }
  910.         }
  911.       else
  912.         {
  913.           strncpy (auxent->x_file.x_fname, name, filnmlen);
  914.           if (name_length > filnmlen)
  915.             name[filnmlen] = '\0';
  916.         }
  917.     }
  918.   else
  919.     {
  920.       if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd))
  921.         /* This name will fit into the symbol neatly.  */
  922.         strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN);
  923.  
  924.       else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment))
  925.         {
  926.           native->u.syment._n._n_n._n_offset = (*string_size_p
  927.                                                 + STRING_SIZE_SIZE);
  928.           native->u.syment._n._n_n._n_zeroes = 0;
  929.           *string_size_p += name_length + 1;
  930.         }
  931.       else
  932.         {
  933.           file_ptr filepos;
  934.           bfd_byte buf[4];
  935.           int prefix_len = bfd_coff_debug_string_prefix_length (abfd);
  936.  
  937.           /* This name should be written into the .debug section.  For
  938.              some reason each name is preceded by a two byte length
  939.              and also followed by a null byte.  FIXME: We assume that
  940.              the .debug section has already been created, and that it
  941.              is large enough.  */
  942.           if (*debug_string_section_p == (asection *) NULL)
  943.             *debug_string_section_p = bfd_get_section_by_name (abfd, ".debug");
  944.           filepos = bfd_tell (abfd);
  945.           if (prefix_len == 4)
  946.             bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf);
  947.           else
  948.             bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf);
  949.  
  950.           if (!bfd_set_section_contents (abfd,
  951.                                          *debug_string_section_p,
  952.                                          (void *) buf,
  953.                                          (file_ptr) *debug_string_size_p,
  954.                                          (bfd_size_type) prefix_len)
  955.               || !bfd_set_section_contents (abfd,
  956.                                             *debug_string_section_p,
  957.                                             (void *) symbol->name,
  958.                                             (file_ptr) (*debug_string_size_p
  959.                                                         + prefix_len),
  960.                                             (bfd_size_type) name_length + 1))
  961.             abort ();
  962.           if (bfd_seek (abfd, filepos, SEEK_SET) != 0)
  963.             abort ();
  964.           native->u.syment._n._n_n._n_offset =
  965.               *debug_string_size_p + prefix_len;
  966.           native->u.syment._n._n_n._n_zeroes = 0;
  967.           *debug_string_size_p += name_length + 1 + prefix_len;
  968.         }
  969.     }
  970. }
  971.  
  972. /* We need to keep track of the symbol index so that when we write out
  973.    the relocs we can get the index for a symbol.  This method is a
  974.    hack.  FIXME.  */
  975.  
  976. #define set_index(symbol, idx)  ((symbol)->udata.i = (idx))
  977.  
  978. /* Write a symbol out to a COFF file.  */
  979.  
  980. static bfd_boolean
  981. coff_write_symbol (bfd *abfd,
  982.                    asymbol *symbol,
  983.                    combined_entry_type *native,
  984.                    bfd_vma *written,
  985.                    bfd_size_type *string_size_p,
  986.                    asection **debug_string_section_p,
  987.                    bfd_size_type *debug_string_size_p)
  988. {
  989.   unsigned int numaux = native->u.syment.n_numaux;
  990.   int type = native->u.syment.n_type;
  991.   int n_sclass = (int) native->u.syment.n_sclass;
  992.   asection *output_section = symbol->section->output_section
  993.                                ? symbol->section->output_section
  994.                                : symbol->section;
  995.   void * buf;
  996.   bfd_size_type symesz;
  997.  
  998.   if (native->u.syment.n_sclass == C_FILE)
  999.     symbol->flags |= BSF_DEBUGGING;
  1000.  
  1001.   if (symbol->flags & BSF_DEBUGGING
  1002.       && bfd_is_abs_section (symbol->section))
  1003.     native->u.syment.n_scnum = N_DEBUG;
  1004.  
  1005.   else if (bfd_is_abs_section (symbol->section))
  1006.     native->u.syment.n_scnum = N_ABS;
  1007.  
  1008.   else if (bfd_is_und_section (symbol->section))
  1009.     native->u.syment.n_scnum = N_UNDEF;
  1010.  
  1011.   else
  1012.     native->u.syment.n_scnum =
  1013.       output_section->target_index;
  1014.  
  1015.   coff_fix_symbol_name (abfd, symbol, native, string_size_p,
  1016.                         debug_string_section_p, debug_string_size_p);
  1017.  
  1018.   symesz = bfd_coff_symesz (abfd);
  1019.   buf = bfd_alloc (abfd, symesz);
  1020.   if (!buf)
  1021.     return FALSE;
  1022.   bfd_coff_swap_sym_out (abfd, &native->u.syment, buf);
  1023.   if (bfd_bwrite (buf, symesz, abfd) != symesz)
  1024.     return FALSE;
  1025.   bfd_release (abfd, buf);
  1026.  
  1027.   if (native->u.syment.n_numaux > 0)
  1028.     {
  1029.       bfd_size_type auxesz;
  1030.       unsigned int j;
  1031.  
  1032.       auxesz = bfd_coff_auxesz (abfd);
  1033.       buf = bfd_alloc (abfd, auxesz);
  1034.       if (!buf)
  1035.         return FALSE;
  1036.       for (j = 0; j < native->u.syment.n_numaux; j++)
  1037.         {
  1038.           bfd_coff_swap_aux_out (abfd,
  1039.                                  &((native + j + 1)->u.auxent),
  1040.                                  type, n_sclass, (int) j,
  1041.                                  native->u.syment.n_numaux,
  1042.                                  buf);
  1043.           if (bfd_bwrite (buf, auxesz, abfd) != auxesz)
  1044.             return FALSE;
  1045.         }
  1046.       bfd_release (abfd, buf);
  1047.     }
  1048.  
  1049.   /* Store the index for use when we write out the relocs.  */
  1050.   set_index (symbol, *written);
  1051.  
  1052.   *written += numaux + 1;
  1053.   return TRUE;
  1054. }
  1055.  
  1056. /* Write out a symbol to a COFF file that does not come from a COFF
  1057.    file originally.  This symbol may have been created by the linker,
  1058.    or we may be linking a non COFF file to a COFF file.  */
  1059.  
  1060. bfd_boolean
  1061. coff_write_alien_symbol (bfd *abfd,
  1062.                          asymbol *symbol,
  1063.                          struct internal_syment *isym,
  1064.                          bfd_vma *written,
  1065.                          bfd_size_type *string_size_p,
  1066.                          asection **debug_string_section_p,
  1067.                          bfd_size_type *debug_string_size_p)
  1068. {
  1069.   combined_entry_type *native;
  1070.   combined_entry_type dummy[2];
  1071.   asection *output_section = symbol->section->output_section
  1072.                                ? symbol->section->output_section
  1073.                                : symbol->section;
  1074.   struct bfd_link_info *link_info = coff_data (abfd)->link_info;
  1075.   bfd_boolean ret;
  1076.  
  1077.   if ((!link_info || link_info->strip_discarded)
  1078.       && !bfd_is_abs_section (symbol->section)
  1079.       && symbol->section->output_section == bfd_abs_section_ptr)
  1080.     {
  1081.       symbol->name = "";
  1082.       if (isym != NULL)
  1083.         memset (isym, 0, sizeof(*isym));
  1084.       return TRUE;
  1085.     }
  1086.   native = dummy;
  1087.   native->u.syment.n_type = T_NULL;
  1088.   native->u.syment.n_flags = 0;
  1089.   native->u.syment.n_numaux = 0;
  1090.   if (bfd_is_und_section (symbol->section))
  1091.     {
  1092.       native->u.syment.n_scnum = N_UNDEF;
  1093.       native->u.syment.n_value = symbol->value;
  1094.     }
  1095.   else if (bfd_is_com_section (symbol->section))
  1096.     {
  1097.       native->u.syment.n_scnum = N_UNDEF;
  1098.       native->u.syment.n_value = symbol->value;
  1099.     }
  1100.   else if (symbol->flags & BSF_FILE)
  1101.     {
  1102.       native->u.syment.n_scnum = N_DEBUG;
  1103.       native->u.syment.n_numaux = 1;
  1104.     }
  1105.   else if (symbol->flags & BSF_DEBUGGING)
  1106.     {
  1107.       /* There isn't much point to writing out a debugging symbol
  1108.          unless we are prepared to convert it into COFF debugging
  1109.          format.  So, we just ignore them.  We must clobber the symbol
  1110.          name to keep it from being put in the string table.  */
  1111.       symbol->name = "";
  1112.       if (isym != NULL)
  1113.         memset (isym, 0, sizeof(*isym));
  1114.       return TRUE;
  1115.     }
  1116.   else
  1117.     {
  1118.       native->u.syment.n_scnum = output_section->target_index;
  1119.       native->u.syment.n_value = (symbol->value
  1120.                                   + symbol->section->output_offset);
  1121.       if (! obj_pe (abfd))
  1122.         native->u.syment.n_value += output_section->vma;
  1123.  
  1124.       /* Copy the any flags from the file header into the symbol.
  1125.          FIXME: Why?  */
  1126.       {
  1127.         coff_symbol_type *c = coff_symbol_from (abfd, symbol);
  1128.         if (c != (coff_symbol_type *) NULL)
  1129.           native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags;
  1130.       }
  1131.     }
  1132.  
  1133.   native->u.syment.n_type = 0;
  1134.   if (symbol->flags & BSF_FILE)
  1135.     native->u.syment.n_sclass = C_FILE;
  1136.   else if (symbol->flags & BSF_LOCAL)
  1137.     native->u.syment.n_sclass = C_STAT;
  1138.   else if (symbol->flags & BSF_WEAK)
  1139.     native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT;
  1140.   else
  1141.     native->u.syment.n_sclass = C_EXT;
  1142.  
  1143.   ret = coff_write_symbol (abfd, symbol, native, written, string_size_p,
  1144.                            debug_string_section_p, debug_string_size_p);
  1145.   if (isym != NULL)
  1146.     *isym = native->u.syment;
  1147.   return ret;
  1148. }
  1149.  
  1150. /* Write a native symbol to a COFF file.  */
  1151.  
  1152. static bfd_boolean
  1153. coff_write_native_symbol (bfd *abfd,
  1154.                           coff_symbol_type *symbol,
  1155.                           bfd_vma *written,
  1156.                           bfd_size_type *string_size_p,
  1157.                           asection **debug_string_section_p,
  1158.                           bfd_size_type *debug_string_size_p)
  1159. {
  1160.   combined_entry_type *native = symbol->native;
  1161.   alent *lineno = symbol->lineno;
  1162.   struct bfd_link_info *link_info = coff_data (abfd)->link_info;
  1163.  
  1164.   if ((!link_info || link_info->strip_discarded)
  1165.       && !bfd_is_abs_section (symbol->symbol.section)
  1166.       && symbol->symbol.section->output_section == bfd_abs_section_ptr)
  1167.     {
  1168.       symbol->symbol.name = "";
  1169.       return TRUE;
  1170.     }
  1171.  
  1172.   /* If this symbol has an associated line number, we must store the
  1173.      symbol index in the line number field.  We also tag the auxent to
  1174.      point to the right place in the lineno table.  */
  1175.   if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL)
  1176.     {
  1177.       unsigned int count = 0;
  1178.  
  1179.       lineno[count].u.offset = *written;
  1180.       if (native->u.syment.n_numaux)
  1181.         {
  1182.           union internal_auxent *a = &((native + 1)->u.auxent);
  1183.  
  1184.           a->x_sym.x_fcnary.x_fcn.x_lnnoptr =
  1185.             symbol->symbol.section->output_section->moving_line_filepos;
  1186.         }
  1187.  
  1188.       /* Count and relocate all other linenumbers.  */
  1189.       count++;
  1190.       while (lineno[count].line_number != 0)
  1191.         {
  1192.           lineno[count].u.offset +=
  1193.             (symbol->symbol.section->output_section->vma
  1194.              + symbol->symbol.section->output_offset);
  1195.           count++;
  1196.         }
  1197.       symbol->done_lineno = TRUE;
  1198.  
  1199.       if (! bfd_is_const_section (symbol->symbol.section->output_section))
  1200.         symbol->symbol.section->output_section->moving_line_filepos +=
  1201.           count * bfd_coff_linesz (abfd);
  1202.     }
  1203.  
  1204.   return coff_write_symbol (abfd, &(symbol->symbol), native, written,
  1205.                             string_size_p, debug_string_section_p,
  1206.                             debug_string_size_p);
  1207. }
  1208.  
  1209. static void
  1210. null_error_handler (const char * fmt ATTRIBUTE_UNUSED, ...)
  1211. {
  1212. }
  1213.  
  1214. /* Write out the COFF symbols.  */
  1215.  
  1216. bfd_boolean
  1217. coff_write_symbols (bfd *abfd)
  1218. {
  1219.   bfd_size_type string_size;
  1220.   asection *debug_string_section;
  1221.   bfd_size_type debug_string_size;
  1222.   unsigned int i;
  1223.   unsigned int limit = bfd_get_symcount (abfd);
  1224.   bfd_vma written = 0;
  1225.   asymbol **p;
  1226.  
  1227.   string_size = 0;
  1228.   debug_string_section = NULL;
  1229.   debug_string_size = 0;
  1230.  
  1231.   /* If this target supports long section names, they must be put into
  1232.      the string table.  This is supported by PE.  This code must
  1233.      handle section names just as they are handled in
  1234.      coff_write_object_contents.  */
  1235.   if (bfd_coff_long_section_names (abfd))
  1236.     {
  1237.       asection *o;
  1238.  
  1239.       for (o = abfd->sections; o != NULL; o = o->next)
  1240.         {
  1241.           size_t len;
  1242.  
  1243.           len = strlen (o->name);
  1244.           if (len > SCNNMLEN)
  1245.             string_size += len + 1;
  1246.         }
  1247.     }
  1248.  
  1249.   /* Seek to the right place.  */
  1250.   if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
  1251.     return FALSE;
  1252.  
  1253.   /* Output all the symbols we have.  */
  1254.   written = 0;
  1255.   for (p = abfd->outsymbols, i = 0; i < limit; i++, p++)
  1256.     {
  1257.       asymbol *symbol = *p;
  1258.       coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol);
  1259.  
  1260.       if (c_symbol == (coff_symbol_type *) NULL
  1261.           || c_symbol->native == (combined_entry_type *) NULL)
  1262.         {
  1263.           if (!coff_write_alien_symbol (abfd, symbol, NULL, &written,
  1264.                                         &string_size, &debug_string_section,
  1265.                                         &debug_string_size))
  1266.             return FALSE;
  1267.         }
  1268.       else
  1269.         {
  1270.           if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL)
  1271.             {
  1272.               bfd_error_handler_type current_error_handler;
  1273.               enum coff_symbol_classification sym_class;
  1274.               unsigned char *n_sclass;
  1275.  
  1276.               /* Suppress error reporting by bfd_coff_classify_symbol.
  1277.                  Error messages can be generated when we are processing a local
  1278.                  symbol which has no associated section and we do not have to
  1279.                  worry about this, all we need to know is that it is local.  */
  1280.               current_error_handler = bfd_set_error_handler (null_error_handler);
  1281.               sym_class = bfd_coff_classify_symbol (abfd,
  1282.                                                    &c_symbol->native->u.syment);
  1283.               (void) bfd_set_error_handler (current_error_handler);
  1284.  
  1285.               n_sclass = &c_symbol->native->u.syment.n_sclass;
  1286.  
  1287.               /* If the symbol class has been changed (eg objcopy/ld script/etc)
  1288.                  we cannot retain the existing sclass from the original symbol.
  1289.                  Weak symbols only have one valid sclass, so just set it always.
  1290.                  If it is not local class and should be, set it C_STAT.
  1291.                  If it is global and not classified as global, or if it is
  1292.                  weak (which is also classified as global), set it C_EXT.  */
  1293.  
  1294.               if (symbol->flags & BSF_WEAK)
  1295.                 *n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT;
  1296.               else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL)
  1297.                 *n_sclass = C_STAT;
  1298.               else if (symbol->flags & BSF_GLOBAL
  1299.                        && (sym_class != COFF_SYMBOL_GLOBAL
  1300. #ifdef COFF_WITH_PE
  1301.                            || *n_sclass == C_NT_WEAK
  1302. #endif
  1303.                            || *n_sclass == C_WEAKEXT))
  1304.                 c_symbol->native->u.syment.n_sclass = C_EXT;
  1305.             }
  1306.  
  1307.           if (!coff_write_native_symbol (abfd, c_symbol, &written,
  1308.                                          &string_size, &debug_string_section,
  1309.                                          &debug_string_size))
  1310.             return FALSE;
  1311.         }
  1312.     }
  1313.  
  1314.   obj_raw_syment_count (abfd) = written;
  1315.  
  1316.   /* Now write out strings.  */
  1317.   if (string_size != 0)
  1318.     {
  1319.       unsigned int size = string_size + STRING_SIZE_SIZE;
  1320.       bfd_byte buffer[STRING_SIZE_SIZE];
  1321.  
  1322. #if STRING_SIZE_SIZE == 4
  1323.       H_PUT_32 (abfd, size, buffer);
  1324. #else
  1325.  #error Change H_PUT_32
  1326. #endif
  1327.       if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd)
  1328.           != sizeof (buffer))
  1329.         return FALSE;
  1330.  
  1331.       /* Handle long section names.  This code must handle section
  1332.          names just as they are handled in coff_write_object_contents.  */
  1333.       if (bfd_coff_long_section_names (abfd))
  1334.         {
  1335.           asection *o;
  1336.  
  1337.           for (o = abfd->sections; o != NULL; o = o->next)
  1338.             {
  1339.               size_t len;
  1340.  
  1341.               len = strlen (o->name);
  1342.               if (len > SCNNMLEN)
  1343.                 {
  1344.                   if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd)
  1345.                       != len + 1)
  1346.                     return FALSE;
  1347.                 }
  1348.             }
  1349.         }
  1350.  
  1351.       for (p = abfd->outsymbols, i = 0;
  1352.            i < limit;
  1353.            i++, p++)
  1354.         {
  1355.           asymbol *q = *p;
  1356.           size_t name_length = strlen (q->name);
  1357.           coff_symbol_type *c_symbol = coff_symbol_from (abfd, q);
  1358.           size_t maxlen;
  1359.  
  1360.           /* Figure out whether the symbol name should go in the string
  1361.              table.  Symbol names that are short enough are stored
  1362.              directly in the syment structure.  File names permit a
  1363.              different, longer, length in the syment structure.  On
  1364.              XCOFF, some symbol names are stored in the .debug section
  1365.              rather than in the string table.  */
  1366.  
  1367.           if (c_symbol == NULL
  1368.               || c_symbol->native == NULL)
  1369.             /* This is not a COFF symbol, so it certainly is not a
  1370.                file name, nor does it go in the .debug section.  */
  1371.             maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
  1372.  
  1373.           else if (bfd_coff_symname_in_debug (abfd,
  1374.                                               &c_symbol->native->u.syment))
  1375.             /* This symbol name is in the XCOFF .debug section.
  1376.                Don't write it into the string table.  */
  1377.             maxlen = name_length;
  1378.  
  1379.           else if (c_symbol->native->u.syment.n_sclass == C_FILE
  1380.                    && c_symbol->native->u.syment.n_numaux > 0)
  1381.             {
  1382.               if (bfd_coff_force_symnames_in_strings (abfd))
  1383.                 {
  1384.                   if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6)
  1385.                     return FALSE;
  1386.                 }
  1387.               maxlen = bfd_coff_filnmlen (abfd);
  1388.             }
  1389.           else
  1390.             maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN;
  1391.  
  1392.           if (name_length > maxlen)
  1393.             {
  1394.               if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1,
  1395.                              abfd) != name_length + 1)
  1396.                 return FALSE;
  1397.             }
  1398.         }
  1399.     }
  1400.   else
  1401.     {
  1402.       /* We would normally not write anything here, but we'll write
  1403.          out 4 so that any stupid coff reader which tries to read the
  1404.          string table even when there isn't one won't croak.  */
  1405.       unsigned int size = STRING_SIZE_SIZE;
  1406.       bfd_byte buffer[STRING_SIZE_SIZE];
  1407.  
  1408. #if STRING_SIZE_SIZE == 4
  1409.       H_PUT_32 (abfd, size, buffer);
  1410. #else
  1411.  #error Change H_PUT_32
  1412. #endif
  1413.       if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd)
  1414.           != STRING_SIZE_SIZE)
  1415.         return FALSE;
  1416.     }
  1417.  
  1418.   /* Make sure the .debug section was created to be the correct size.
  1419.      We should create it ourselves on the fly, but we don't because
  1420.      BFD won't let us write to any section until we know how large all
  1421.      the sections are.  We could still do it by making another pass
  1422.      over the symbols.  FIXME.  */
  1423.   BFD_ASSERT (debug_string_size == 0
  1424.               || (debug_string_section != (asection *) NULL
  1425.                   && (BFD_ALIGN (debug_string_size,
  1426.                                  1 << debug_string_section->alignment_power)
  1427.                       == debug_string_section->size)));
  1428.  
  1429.   return TRUE;
  1430. }
  1431.  
  1432. bfd_boolean
  1433. coff_write_linenumbers (bfd *abfd)
  1434. {
  1435.   asection *s;
  1436.   bfd_size_type linesz;
  1437.   void * buff;
  1438.  
  1439.   linesz = bfd_coff_linesz (abfd);
  1440.   buff = bfd_alloc (abfd, linesz);
  1441.   if (!buff)
  1442.     return FALSE;
  1443.   for (s = abfd->sections; s != (asection *) NULL; s = s->next)
  1444.     {
  1445.       if (s->lineno_count)
  1446.         {
  1447.           asymbol **q = abfd->outsymbols;
  1448.           if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0)
  1449.             return FALSE;
  1450.           /* Find all the linenumbers in this section.  */
  1451.           while (*q)
  1452.             {
  1453.               asymbol *p = *q;
  1454.               if (p->section->output_section == s)
  1455.                 {
  1456.                   alent *l =
  1457.                   BFD_SEND (bfd_asymbol_bfd (p), _get_lineno,
  1458.                             (bfd_asymbol_bfd (p), p));
  1459.                   if (l)
  1460.                     {
  1461.                       /* Found a linenumber entry, output.  */
  1462.                       struct internal_lineno out;
  1463.                       memset ((void *) & out, 0, sizeof (out));
  1464.                       out.l_lnno = 0;
  1465.                       out.l_addr.l_symndx = l->u.offset;
  1466.                       bfd_coff_swap_lineno_out (abfd, &out, buff);
  1467.                       if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
  1468.                           != linesz)
  1469.                         return FALSE;
  1470.                       l++;
  1471.                       while (l->line_number)
  1472.                         {
  1473.                           out.l_lnno = l->line_number;
  1474.                           out.l_addr.l_symndx = l->u.offset;
  1475.                           bfd_coff_swap_lineno_out (abfd, &out, buff);
  1476.                           if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd)
  1477.                               != linesz)
  1478.                             return FALSE;
  1479.                           l++;
  1480.                         }
  1481.                     }
  1482.                 }
  1483.               q++;
  1484.             }
  1485.         }
  1486.     }
  1487.   bfd_release (abfd, buff);
  1488.   return TRUE;
  1489. }
  1490.  
  1491. alent *
  1492. coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol)
  1493. {
  1494.   return coffsymbol (symbol)->lineno;
  1495. }
  1496.  
  1497. /* This function transforms the offsets into the symbol table into
  1498.    pointers to syments.  */
  1499.  
  1500. static void
  1501. coff_pointerize_aux (bfd *abfd,
  1502.                      combined_entry_type *table_base,
  1503.                      combined_entry_type *symbol,
  1504.                      unsigned int indaux,
  1505.                      combined_entry_type *auxent)
  1506. {
  1507.   unsigned int type = symbol->u.syment.n_type;
  1508.   unsigned int n_sclass = symbol->u.syment.n_sclass;
  1509.  
  1510.   if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
  1511.     {
  1512.       if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook)
  1513.           (abfd, table_base, symbol, indaux, auxent))
  1514.         return;
  1515.     }
  1516.  
  1517.   /* Don't bother if this is a file or a section.  */
  1518.   if (n_sclass == C_STAT && type == T_NULL)
  1519.     return;
  1520.   if (n_sclass == C_FILE)
  1521.     return;
  1522.  
  1523.   /* Otherwise patch up.  */
  1524. #define N_TMASK coff_data  (abfd)->local_n_tmask
  1525. #define N_BTSHFT coff_data (abfd)->local_n_btshft
  1526.  
  1527.   if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK
  1528.        || n_sclass == C_FCN)
  1529.       && auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0)
  1530.     {
  1531.       auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p =
  1532.         table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
  1533.       auxent->fix_end = 1;
  1534.     }
  1535.   /* A negative tagndx is meaningless, but the SCO 3.2v4 cc can
  1536.      generate one, so we must be careful to ignore it.  */
  1537.   if (auxent->u.auxent.x_sym.x_tagndx.l > 0)
  1538.     {
  1539.       auxent->u.auxent.x_sym.x_tagndx.p =
  1540.         table_base + auxent->u.auxent.x_sym.x_tagndx.l;
  1541.       auxent->fix_tag = 1;
  1542.     }
  1543. }
  1544.  
  1545. /* Allocate space for the ".debug" section, and read it.
  1546.    We did not read the debug section until now, because
  1547.    we didn't want to go to the trouble until someone needed it.  */
  1548.  
  1549. static char *
  1550. build_debug_section (bfd *abfd)
  1551. {
  1552.   char *debug_section;
  1553.   file_ptr position;
  1554.   bfd_size_type sec_size;
  1555.  
  1556.   asection *sect = bfd_get_section_by_name (abfd, ".debug");
  1557.  
  1558.   if (!sect)
  1559.     {
  1560.       bfd_set_error (bfd_error_no_debug_section);
  1561.       return NULL;
  1562.     }
  1563.  
  1564.   sec_size = sect->size;
  1565.   debug_section = (char *) bfd_alloc (abfd, sec_size);
  1566.   if (debug_section == NULL)
  1567.     return NULL;
  1568.  
  1569.   /* Seek to the beginning of the `.debug' section and read it.
  1570.      Save the current position first; it is needed by our caller.
  1571.      Then read debug section and reset the file pointer.  */
  1572.  
  1573.   position = bfd_tell (abfd);
  1574.   if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0
  1575.       || bfd_bread (debug_section, sec_size, abfd) != sec_size
  1576.       || bfd_seek (abfd, position, SEEK_SET) != 0)
  1577.     return NULL;
  1578.   return debug_section;
  1579. }
  1580.  
  1581. /* Return a pointer to a malloc'd copy of 'name'.  'name' may not be
  1582.    \0-terminated, but will not exceed 'maxlen' characters.  The copy *will*
  1583.    be \0-terminated.  */
  1584.  
  1585. static char *
  1586. copy_name (bfd *abfd, char *name, size_t maxlen)
  1587. {
  1588.   size_t len;
  1589.   char *newname;
  1590.  
  1591.   for (len = 0; len < maxlen; ++len)
  1592.     if (name[len] == '\0')
  1593.       break;
  1594.  
  1595.   if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL)
  1596.     return NULL;
  1597.  
  1598.   strncpy (newname, name, len);
  1599.   newname[len] = '\0';
  1600.   return newname;
  1601. }
  1602.  
  1603. /* Read in the external symbols.  */
  1604.  
  1605. bfd_boolean
  1606. _bfd_coff_get_external_symbols (bfd *abfd)
  1607. {
  1608.   bfd_size_type symesz;
  1609.   bfd_size_type size;
  1610.   void * syms;
  1611.  
  1612.   if (obj_coff_external_syms (abfd) != NULL)
  1613.     return TRUE;
  1614.  
  1615.   symesz = bfd_coff_symesz (abfd);
  1616.  
  1617.   size = obj_raw_syment_count (abfd) * symesz;
  1618.   if (size == 0)
  1619.     return TRUE;
  1620.  
  1621.   syms = bfd_malloc (size);
  1622.   if (syms == NULL)
  1623.     return FALSE;
  1624.  
  1625.   if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
  1626.       || bfd_bread (syms, size, abfd) != size)
  1627.     {
  1628.       if (syms != NULL)
  1629.         free (syms);
  1630.       return FALSE;
  1631.     }
  1632.  
  1633.   obj_coff_external_syms (abfd) = syms;
  1634.  
  1635.   return TRUE;
  1636. }
  1637.  
  1638. /* Read in the external strings.  The strings are not loaded until
  1639.    they are needed.  This is because we have no simple way of
  1640.    detecting a missing string table in an archive.  */
  1641.  
  1642. const char *
  1643. _bfd_coff_read_string_table (bfd *abfd)
  1644. {
  1645.   char extstrsize[STRING_SIZE_SIZE];
  1646.   bfd_size_type strsize;
  1647.   char *strings;
  1648.   file_ptr pos;
  1649.  
  1650.   if (obj_coff_strings (abfd) != NULL)
  1651.     return obj_coff_strings (abfd);
  1652.  
  1653.   if (obj_sym_filepos (abfd) == 0)
  1654.     {
  1655.       bfd_set_error (bfd_error_no_symbols);
  1656.       return NULL;
  1657.     }
  1658.  
  1659.   pos = obj_sym_filepos (abfd);
  1660.   pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd);
  1661.   if (bfd_seek (abfd, pos, SEEK_SET) != 0)
  1662.     return NULL;
  1663.  
  1664.   if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd)
  1665.       != sizeof extstrsize)
  1666.     {
  1667.       if (bfd_get_error () != bfd_error_file_truncated)
  1668.         return NULL;
  1669.  
  1670.       /* There is no string table.  */
  1671.       strsize = STRING_SIZE_SIZE;
  1672.     }
  1673.   else
  1674.     {
  1675. #if STRING_SIZE_SIZE == 4
  1676.       strsize = H_GET_32 (abfd, extstrsize);
  1677. #else
  1678.  #error Change H_GET_32
  1679. #endif
  1680.     }
  1681.  
  1682.   if (strsize < STRING_SIZE_SIZE)
  1683.     {
  1684.       (*_bfd_error_handler)
  1685.         (_("%B: bad string table size %lu"), abfd, (unsigned long) strsize);
  1686.       bfd_set_error (bfd_error_bad_value);
  1687.       return NULL;
  1688.     }
  1689.  
  1690.   strings = (char *) bfd_malloc (strsize);
  1691.   if (strings == NULL)
  1692.     return NULL;
  1693.  
  1694.   if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd)
  1695.       != strsize - STRING_SIZE_SIZE)
  1696.     {
  1697.       free (strings);
  1698.       return NULL;
  1699.     }
  1700.  
  1701.   obj_coff_strings (abfd) = strings;
  1702.  
  1703.   return strings;
  1704. }
  1705.  
  1706. /* Free up the external symbols and strings read from a COFF file.  */
  1707.  
  1708. bfd_boolean
  1709. _bfd_coff_free_symbols (bfd *abfd)
  1710. {
  1711.   if (obj_coff_external_syms (abfd) != NULL
  1712.       && ! obj_coff_keep_syms (abfd))
  1713.     {
  1714.       free (obj_coff_external_syms (abfd));
  1715.       obj_coff_external_syms (abfd) = NULL;
  1716.     }
  1717.   if (obj_coff_strings (abfd) != NULL
  1718.       && ! obj_coff_keep_strings (abfd))
  1719.     {
  1720.       free (obj_coff_strings (abfd));
  1721.       obj_coff_strings (abfd) = NULL;
  1722.     }
  1723.   return TRUE;
  1724. }
  1725.  
  1726. /* Read a symbol table into freshly bfd_allocated memory, swap it, and
  1727.    knit the symbol names into a normalized form.  By normalized here I
  1728.    mean that all symbols have an n_offset pointer that points to a null-
  1729.    terminated string.  */
  1730.  
  1731. combined_entry_type *
  1732. coff_get_normalized_symtab (bfd *abfd)
  1733. {
  1734.   combined_entry_type *internal;
  1735.   combined_entry_type *internal_ptr;
  1736.   combined_entry_type *symbol_ptr;
  1737.   combined_entry_type *internal_end;
  1738.   size_t symesz;
  1739.   char *raw_src;
  1740.   char *raw_end;
  1741.   const char *string_table = NULL;
  1742.   char *debug_section = NULL;
  1743.   bfd_size_type size;
  1744.  
  1745.   if (obj_raw_syments (abfd) != NULL)
  1746.     return obj_raw_syments (abfd);
  1747.  
  1748.   size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type);
  1749.   internal = (combined_entry_type *) bfd_zalloc (abfd, size);
  1750.   if (internal == NULL && size != 0)
  1751.     return NULL;
  1752.   internal_end = internal + obj_raw_syment_count (abfd);
  1753.  
  1754.   if (! _bfd_coff_get_external_symbols (abfd))
  1755.     return NULL;
  1756.  
  1757.   raw_src = (char *) obj_coff_external_syms (abfd);
  1758.  
  1759.   /* Mark the end of the symbols.  */
  1760.   symesz = bfd_coff_symesz (abfd);
  1761.   raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz;
  1762.  
  1763.   /* FIXME SOMEDAY.  A string table size of zero is very weird, but
  1764.      probably possible.  If one shows up, it will probably kill us.  */
  1765.  
  1766.   /* Swap all the raw entries.  */
  1767.   for (internal_ptr = internal;
  1768.        raw_src < raw_end;
  1769.        raw_src += symesz, internal_ptr++)
  1770.     {
  1771.  
  1772.       unsigned int i;
  1773.       bfd_coff_swap_sym_in (abfd, (void *) raw_src,
  1774.                             (void *) & internal_ptr->u.syment);
  1775.       symbol_ptr = internal_ptr;
  1776.  
  1777.       for (i = 0;
  1778.            i < symbol_ptr->u.syment.n_numaux;
  1779.            i++)
  1780.         {
  1781.           internal_ptr++;
  1782.           raw_src += symesz;
  1783.           bfd_coff_swap_aux_in (abfd, (void *) raw_src,
  1784.                                 symbol_ptr->u.syment.n_type,
  1785.                                 symbol_ptr->u.syment.n_sclass,
  1786.                                 (int) i, symbol_ptr->u.syment.n_numaux,
  1787.                                 &(internal_ptr->u.auxent));
  1788.           coff_pointerize_aux (abfd, internal, symbol_ptr, i,
  1789.                                internal_ptr);
  1790.         }
  1791.     }
  1792.  
  1793.   /* Free the raw symbols, but not the strings (if we have them).  */
  1794.   obj_coff_keep_strings (abfd) = TRUE;
  1795.   if (! _bfd_coff_free_symbols (abfd))
  1796.     return NULL;
  1797.  
  1798.   for (internal_ptr = internal; internal_ptr < internal_end;
  1799.        internal_ptr++)
  1800.     {
  1801.       if (internal_ptr->u.syment.n_sclass == C_FILE
  1802.           && internal_ptr->u.syment.n_numaux > 0)
  1803.         {
  1804.           /* Make a file symbol point to the name in the auxent, since
  1805.              the text ".file" is redundant.  */
  1806.           if ((internal_ptr + 1)->u.auxent.x_file.x_n.x_zeroes == 0)
  1807.             {
  1808.               /* The filename is a long one, point into the string table.  */
  1809.               if (string_table == NULL)
  1810.                 {
  1811.                   string_table = _bfd_coff_read_string_table (abfd);
  1812.                   if (string_table == NULL)
  1813.                     return NULL;
  1814.                 }
  1815.  
  1816.               internal_ptr->u.syment._n._n_n._n_offset =
  1817.                 ((bfd_hostptr_t)
  1818.                  (string_table
  1819.                   + (internal_ptr + 1)->u.auxent.x_file.x_n.x_offset));
  1820.             }
  1821.           else
  1822.             {
  1823.               /* Ordinary short filename, put into memory anyway.  The
  1824.                  Microsoft PE tools sometimes store a filename in
  1825.                  multiple AUX entries.  */
  1826.               if (internal_ptr->u.syment.n_numaux > 1
  1827.                   && coff_data (abfd)->pe)
  1828.                 internal_ptr->u.syment._n._n_n._n_offset =
  1829.                   ((bfd_hostptr_t)
  1830.                    copy_name (abfd,
  1831.                               (internal_ptr + 1)->u.auxent.x_file.x_fname,
  1832.                               internal_ptr->u.syment.n_numaux * symesz));
  1833.               else
  1834.                 internal_ptr->u.syment._n._n_n._n_offset =
  1835.                   ((bfd_hostptr_t)
  1836.                    copy_name (abfd,
  1837.                               (internal_ptr + 1)->u.auxent.x_file.x_fname,
  1838.                               (size_t) bfd_coff_filnmlen (abfd)));
  1839.             }
  1840.         }
  1841.       else
  1842.         {
  1843.           if (internal_ptr->u.syment._n._n_n._n_zeroes != 0)
  1844.             {
  1845.               /* This is a "short" name.  Make it long.  */
  1846.               size_t i;
  1847.               char *newstring;
  1848.  
  1849.               /* Find the length of this string without walking into memory
  1850.                  that isn't ours.  */
  1851.               for (i = 0; i < 8; ++i)
  1852.                 if (internal_ptr->u.syment._n._n_name[i] == '\0')
  1853.                   break;
  1854.  
  1855.               newstring = (char *) bfd_zalloc (abfd, (bfd_size_type) (i + 1));
  1856.               if (newstring == NULL)
  1857.                 return NULL;
  1858.               strncpy (newstring, internal_ptr->u.syment._n._n_name, i);
  1859.               internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) newstring;
  1860.               internal_ptr->u.syment._n._n_n._n_zeroes = 0;
  1861.             }
  1862.           else if (internal_ptr->u.syment._n._n_n._n_offset == 0)
  1863.             internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) "";
  1864.           else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment))
  1865.             {
  1866.               /* Long name already.  Point symbol at the string in the
  1867.                  table.  */
  1868.               if (string_table == NULL)
  1869.                 {
  1870.                   string_table = _bfd_coff_read_string_table (abfd);
  1871.                   if (string_table == NULL)
  1872.                     return NULL;
  1873.                 }
  1874.               internal_ptr->u.syment._n._n_n._n_offset =
  1875.                 ((bfd_hostptr_t)
  1876.                  (string_table
  1877.                   + internal_ptr->u.syment._n._n_n._n_offset));
  1878.             }
  1879.           else
  1880.             {
  1881.               /* Long name in debug section.  Very similar.  */
  1882.               if (debug_section == NULL)
  1883.                 debug_section = build_debug_section (abfd);
  1884.               internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t)
  1885.                 (debug_section + internal_ptr->u.syment._n._n_n._n_offset);
  1886.             }
  1887.         }
  1888.       internal_ptr += internal_ptr->u.syment.n_numaux;
  1889.     }
  1890.  
  1891.   obj_raw_syments (abfd) = internal;
  1892.   BFD_ASSERT (obj_raw_syment_count (abfd)
  1893.               == (unsigned int) (internal_ptr - internal));
  1894.  
  1895.   return internal;
  1896. }
  1897.  
  1898. long
  1899. coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
  1900. {
  1901.   if (bfd_get_format (abfd) != bfd_object)
  1902.     {
  1903.       bfd_set_error (bfd_error_invalid_operation);
  1904.       return -1;
  1905.     }
  1906.   return (asect->reloc_count + 1) * sizeof (arelent *);
  1907. }
  1908.  
  1909. asymbol *
  1910. coff_make_empty_symbol (bfd *abfd)
  1911. {
  1912.   bfd_size_type amt = sizeof (coff_symbol_type);
  1913.   coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt);
  1914.  
  1915.   if (new_symbol == NULL)
  1916.     return NULL;
  1917.   new_symbol->symbol.section = 0;
  1918.   new_symbol->native = 0;
  1919.   new_symbol->lineno = NULL;
  1920.   new_symbol->done_lineno = FALSE;
  1921.   new_symbol->symbol.the_bfd = abfd;
  1922.  
  1923.   return & new_symbol->symbol;
  1924. }
  1925.  
  1926. /* Make a debugging symbol.  */
  1927.  
  1928. asymbol *
  1929. coff_bfd_make_debug_symbol (bfd *abfd,
  1930.                             void * ptr ATTRIBUTE_UNUSED,
  1931.                             unsigned long sz ATTRIBUTE_UNUSED)
  1932. {
  1933.   bfd_size_type amt = sizeof (coff_symbol_type);
  1934.   coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt);
  1935.  
  1936.   if (new_symbol == NULL)
  1937.     return NULL;
  1938.   /* @@ The 10 is a guess at a plausible maximum number of aux entries
  1939.      (but shouldn't be a constant).  */
  1940.   amt = sizeof (combined_entry_type) * 10;
  1941.   new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt);
  1942.   if (!new_symbol->native)
  1943.     return NULL;
  1944.   new_symbol->symbol.section = bfd_abs_section_ptr;
  1945.   new_symbol->symbol.flags = BSF_DEBUGGING;
  1946.   new_symbol->lineno = NULL;
  1947.   new_symbol->done_lineno = FALSE;
  1948.   new_symbol->symbol.the_bfd = abfd;
  1949.  
  1950.   return & new_symbol->symbol;
  1951. }
  1952.  
  1953. void
  1954. coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret)
  1955. {
  1956.   bfd_symbol_info (symbol, ret);
  1957.  
  1958.   if (coffsymbol (symbol)->native != NULL
  1959.       && coffsymbol (symbol)->native->fix_value)
  1960.     ret->value = coffsymbol (symbol)->native->u.syment.n_value -
  1961.       (bfd_hostptr_t) obj_raw_syments (abfd);
  1962. }
  1963.  
  1964. /* Return the COFF syment for a symbol.  */
  1965.  
  1966. bfd_boolean
  1967. bfd_coff_get_syment (bfd *abfd,
  1968.                      asymbol *symbol,
  1969.                      struct internal_syment *psyment)
  1970. {
  1971.   coff_symbol_type *csym;
  1972.  
  1973.   csym = coff_symbol_from (abfd, symbol);
  1974.   if (csym == NULL || csym->native == NULL)
  1975.     {
  1976.       bfd_set_error (bfd_error_invalid_operation);
  1977.       return FALSE;
  1978.     }
  1979.  
  1980.   *psyment = csym->native->u.syment;
  1981.  
  1982.   if (csym->native->fix_value)
  1983.     psyment->n_value = psyment->n_value -
  1984.       (bfd_hostptr_t) obj_raw_syments (abfd);
  1985.  
  1986.   /* FIXME: We should handle fix_line here.  */
  1987.  
  1988.   return TRUE;
  1989. }
  1990.  
  1991. /* Return the COFF auxent for a symbol.  */
  1992.  
  1993. bfd_boolean
  1994. bfd_coff_get_auxent (bfd *abfd,
  1995.                      asymbol *symbol,
  1996.                      int indx,
  1997.                      union internal_auxent *pauxent)
  1998. {
  1999.   coff_symbol_type *csym;
  2000.   combined_entry_type *ent;
  2001.  
  2002.   csym = coff_symbol_from (abfd, symbol);
  2003.  
  2004.   if (csym == NULL
  2005.       || csym->native == NULL
  2006.       || indx >= csym->native->u.syment.n_numaux)
  2007.     {
  2008.       bfd_set_error (bfd_error_invalid_operation);
  2009.       return FALSE;
  2010.     }
  2011.  
  2012.   ent = csym->native + indx + 1;
  2013.  
  2014.   *pauxent = ent->u.auxent;
  2015.  
  2016.   if (ent->fix_tag)
  2017.     pauxent->x_sym.x_tagndx.l =
  2018.       ((combined_entry_type *) pauxent->x_sym.x_tagndx.p
  2019.        - obj_raw_syments (abfd));
  2020.  
  2021.   if (ent->fix_end)
  2022.     pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l =
  2023.       ((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p
  2024.        - obj_raw_syments (abfd));
  2025.  
  2026.   if (ent->fix_scnlen)
  2027.     pauxent->x_csect.x_scnlen.l =
  2028.       ((combined_entry_type *) pauxent->x_csect.x_scnlen.p
  2029.        - obj_raw_syments (abfd));
  2030.  
  2031.   return TRUE;
  2032. }
  2033.  
  2034. /* Print out information about COFF symbol.  */
  2035.  
  2036. void
  2037. coff_print_symbol (bfd *abfd,
  2038.                    void * filep,
  2039.                    asymbol *symbol,
  2040.                    bfd_print_symbol_type how)
  2041. {
  2042.   FILE * file = (FILE *) filep;
  2043.  
  2044.   switch (how)
  2045.     {
  2046.     case bfd_print_symbol_name:
  2047.       fprintf (file, "%s", symbol->name);
  2048.       break;
  2049.  
  2050.     case bfd_print_symbol_more:
  2051.       fprintf (file, "coff %s %s",
  2052.                coffsymbol (symbol)->native ? "n" : "g",
  2053.                coffsymbol (symbol)->lineno ? "l" : " ");
  2054.       break;
  2055.  
  2056.     case bfd_print_symbol_all:
  2057.       if (coffsymbol (symbol)->native)
  2058.         {
  2059.           bfd_vma val;
  2060.           unsigned int aux;
  2061.           combined_entry_type *combined = coffsymbol (symbol)->native;
  2062.           combined_entry_type *root = obj_raw_syments (abfd);
  2063.           struct lineno_cache_entry *l = coffsymbol (symbol)->lineno;
  2064.  
  2065.           fprintf (file, "[%3ld]", (long) (combined - root));
  2066.  
  2067.           if (! combined->fix_value)
  2068.             val = (bfd_vma) combined->u.syment.n_value;
  2069.           else
  2070.             val = combined->u.syment.n_value - (bfd_hostptr_t) root;
  2071.  
  2072.           fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x",
  2073.                    combined->u.syment.n_scnum,
  2074.                    combined->u.syment.n_flags,
  2075.                    combined->u.syment.n_type,
  2076.                    combined->u.syment.n_sclass,
  2077.                    combined->u.syment.n_numaux);
  2078.           bfd_fprintf_vma (abfd, file, val);
  2079.           fprintf (file, " %s", symbol->name);
  2080.  
  2081.           for (aux = 0; aux < combined->u.syment.n_numaux; aux++)
  2082.             {
  2083.               combined_entry_type *auxp = combined + aux + 1;
  2084.               long tagndx;
  2085.  
  2086.               if (auxp->fix_tag)
  2087.                 tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root;
  2088.               else
  2089.                 tagndx = auxp->u.auxent.x_sym.x_tagndx.l;
  2090.  
  2091.               fprintf (file, "\n");
  2092.  
  2093.               if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux))
  2094.                 continue;
  2095.  
  2096.               switch (combined->u.syment.n_sclass)
  2097.                 {
  2098.                 case C_FILE:
  2099.                   fprintf (file, "File ");
  2100.                   break;
  2101.  
  2102.                 case C_STAT:
  2103.                   if (combined->u.syment.n_type == T_NULL)
  2104.                     /* Probably a section symbol ?  */
  2105.                     {
  2106.                       fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d",
  2107.                                (unsigned long) auxp->u.auxent.x_scn.x_scnlen,
  2108.                                auxp->u.auxent.x_scn.x_nreloc,
  2109.                                auxp->u.auxent.x_scn.x_nlinno);
  2110.                       if (auxp->u.auxent.x_scn.x_checksum != 0
  2111.                           || auxp->u.auxent.x_scn.x_associated != 0
  2112.                           || auxp->u.auxent.x_scn.x_comdat != 0)
  2113.                         fprintf (file, " checksum 0x%lx assoc %d comdat %d",
  2114.                                  auxp->u.auxent.x_scn.x_checksum,
  2115.                                  auxp->u.auxent.x_scn.x_associated,
  2116.                                  auxp->u.auxent.x_scn.x_comdat);
  2117.                       break;
  2118.                     }
  2119.                     /* Otherwise fall through.  */
  2120.                 case C_EXT:
  2121.                 case C_AIX_WEAKEXT:
  2122.                   if (ISFCN (combined->u.syment.n_type))
  2123.                     {
  2124.                       long next, llnos;
  2125.  
  2126.                       if (auxp->fix_end)
  2127.                         next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
  2128.                                - root);
  2129.                       else
  2130.                         next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l;
  2131.                       llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr;
  2132.                       fprintf (file,
  2133.                                "AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld",
  2134.                                tagndx,
  2135.                                (unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize,
  2136.                                llnos, next);
  2137.                       break;
  2138.                     }
  2139.                   /* Otherwise fall through.  */
  2140.                 default:
  2141.                   fprintf (file, "AUX lnno %d size 0x%x tagndx %ld",
  2142.                            auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno,
  2143.                            auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size,
  2144.                            tagndx);
  2145.                   if (auxp->fix_end)
  2146.                     fprintf (file, " endndx %ld",
  2147.                              ((long)
  2148.                               (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p
  2149.                                - root)));
  2150.                   break;
  2151.                 }
  2152.             }
  2153.  
  2154.           if (l)
  2155.             {
  2156.               fprintf (file, "\n%s :", l->u.sym->name);
  2157.               l++;
  2158.               while (l->line_number)
  2159.                 {
  2160.                   fprintf (file, "\n%4d : ", l->line_number);
  2161.                   bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma);
  2162.                   l++;
  2163.                 }
  2164.             }
  2165.         }
  2166.       else
  2167.         {
  2168.           bfd_print_symbol_vandf (abfd, (void *) file, symbol);
  2169.           fprintf (file, " %-5s %s %s %s",
  2170.                    symbol->section->name,
  2171.                    coffsymbol (symbol)->native ? "n" : "g",
  2172.                    coffsymbol (symbol)->lineno ? "l" : " ",
  2173.                    symbol->name);
  2174.         }
  2175.     }
  2176. }
  2177.  
  2178. /* Return whether a symbol name implies a local symbol.  In COFF,
  2179.    local symbols generally start with ``.L''.  Most targets use this
  2180.    function for the is_local_label_name entry point, but some may
  2181.    override it.  */
  2182.  
  2183. bfd_boolean
  2184. _bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
  2185.                                const char *name)
  2186. {
  2187.   return name[0] == '.' && name[1] == 'L';
  2188. }
  2189.  
  2190. /* Provided a BFD, a section and an offset (in bytes, not octets) into the
  2191.    section, calculate and return the name of the source file and the line
  2192.    nearest to the wanted location.  */
  2193.  
  2194. bfd_boolean
  2195. coff_find_nearest_line_with_names (bfd *abfd,
  2196.                                    const struct dwarf_debug_section *debug_sections,
  2197.                                    asection *section,
  2198.                                    asymbol **symbols,
  2199.                                    bfd_vma offset,
  2200.                                    const char **filename_ptr,
  2201.                                    const char **functionname_ptr,
  2202.                                    unsigned int *line_ptr)
  2203. {
  2204.   bfd_boolean found;
  2205.   unsigned int i;
  2206.   unsigned int line_base;
  2207.   coff_data_type *cof = coff_data (abfd);
  2208.   /* Run through the raw syments if available.  */
  2209.   combined_entry_type *p;
  2210.   combined_entry_type *pend;
  2211.   alent *l;
  2212.   struct coff_section_tdata *sec_data;
  2213.   bfd_size_type amt;
  2214.  
  2215.   /* Before looking through the symbol table, try to use a .stab
  2216.      section to find the information.  */
  2217.   if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
  2218.                                              &found, filename_ptr,
  2219.                                              functionname_ptr, line_ptr,
  2220.                                              &coff_data(abfd)->line_info))
  2221.     return FALSE;
  2222.  
  2223.   if (found)
  2224.     return TRUE;
  2225.  
  2226.   /* Also try examining DWARF2 debugging information.  */
  2227.   if (_bfd_dwarf2_find_nearest_line (abfd, debug_sections,
  2228.                                      section, symbols, offset,
  2229.                                      filename_ptr, functionname_ptr,
  2230.                                      line_ptr, NULL, 0,
  2231.                                      &coff_data(abfd)->dwarf2_find_line_info))
  2232.     return TRUE;
  2233.  
  2234.   *filename_ptr = 0;
  2235.   *functionname_ptr = 0;
  2236.   *line_ptr = 0;
  2237.  
  2238.   /* Don't try and find line numbers in a non coff file.  */
  2239.   if (!bfd_family_coff (abfd))
  2240.     return FALSE;
  2241.  
  2242.   if (cof == NULL)
  2243.     return FALSE;
  2244.  
  2245.   /* Find the first C_FILE symbol.  */
  2246.   p = cof->raw_syments;
  2247.   if (!p)
  2248.     return FALSE;
  2249.  
  2250.   pend = p + cof->raw_syment_count;
  2251.   while (p < pend)
  2252.     {
  2253.       if (p->u.syment.n_sclass == C_FILE)
  2254.         break;
  2255.       p += 1 + p->u.syment.n_numaux;
  2256.     }
  2257.  
  2258.   if (p < pend)
  2259.     {
  2260.       bfd_vma sec_vma;
  2261.       bfd_vma maxdiff;
  2262.  
  2263.       /* Look through the C_FILE symbols to find the best one.  */
  2264.       sec_vma = bfd_get_section_vma (abfd, section);
  2265.       *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
  2266.       maxdiff = (bfd_vma) 0 - (bfd_vma) 1;
  2267.       while (1)
  2268.         {
  2269.           bfd_vma file_addr;
  2270.           combined_entry_type *p2;
  2271.  
  2272.           for (p2 = p + 1 + p->u.syment.n_numaux;
  2273.                p2 < pend;
  2274.                p2 += 1 + p2->u.syment.n_numaux)
  2275.             {
  2276.               if (p2->u.syment.n_scnum > 0
  2277.                   && (section
  2278.                       == coff_section_from_bfd_index (abfd,
  2279.                                                       p2->u.syment.n_scnum)))
  2280.                 break;
  2281.               if (p2->u.syment.n_sclass == C_FILE)
  2282.                 {
  2283.                   p2 = pend;
  2284.                   break;
  2285.                 }
  2286.             }
  2287.  
  2288.           file_addr = (bfd_vma) p2->u.syment.n_value;
  2289.           /* PR 11512: Include the section address of the function name symbol.  */
  2290.           if (p2->u.syment.n_scnum > 0)
  2291.             file_addr += coff_section_from_bfd_index (abfd,
  2292.                                                       p2->u.syment.n_scnum)->vma;
  2293.           /* We use <= MAXDIFF here so that if we get a zero length
  2294.              file, we actually use the next file entry.  */
  2295.           if (p2 < pend
  2296.               && offset + sec_vma >= file_addr
  2297.               && offset + sec_vma - file_addr <= maxdiff)
  2298.             {
  2299.               *filename_ptr = (char *) p->u.syment._n._n_n._n_offset;
  2300.               maxdiff = offset + sec_vma - p2->u.syment.n_value;
  2301.             }
  2302.  
  2303.           /* Avoid endless loops on erroneous files by ensuring that
  2304.              we always move forward in the file.  */
  2305.           if (p >= cof->raw_syments + p->u.syment.n_value)
  2306.             break;
  2307.  
  2308.           p = cof->raw_syments + p->u.syment.n_value;
  2309.           if (p > pend || p->u.syment.n_sclass != C_FILE)
  2310.             break;
  2311.         }
  2312.     }
  2313.  
  2314.   /* Now wander though the raw linenumbers of the section.  */
  2315.   /* If we have been called on this section before, and the offset we
  2316.      want is further down then we can prime the lookup loop.  */
  2317.   sec_data = coff_section_data (abfd, section);
  2318.   if (sec_data != NULL
  2319.       && sec_data->i > 0
  2320.       && offset >= sec_data->offset)
  2321.     {
  2322.       i = sec_data->i;
  2323.       *functionname_ptr = sec_data->function;
  2324.       line_base = sec_data->line_base;
  2325.     }
  2326.   else
  2327.     {
  2328.       i = 0;
  2329.       line_base = 0;
  2330.     }
  2331.  
  2332.   if (section->lineno != NULL)
  2333.     {
  2334.       bfd_vma last_value = 0;
  2335.  
  2336.       l = &section->lineno[i];
  2337.  
  2338.       for (; i < section->lineno_count; i++)
  2339.         {
  2340.           if (l->line_number == 0)
  2341.             {
  2342.               /* Get the symbol this line number points at.  */
  2343.               coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym);
  2344.               if (coff->symbol.value > offset)
  2345.                 break;
  2346.               *functionname_ptr = coff->symbol.name;
  2347.               last_value = coff->symbol.value;
  2348.               if (coff->native)
  2349.                 {
  2350.                   combined_entry_type *s = coff->native;
  2351.                   s = s + 1 + s->u.syment.n_numaux;
  2352.  
  2353.                   /* In XCOFF a debugging symbol can follow the
  2354.                      function symbol.  */
  2355.                   if (s->u.syment.n_scnum == N_DEBUG)
  2356.                     s = s + 1 + s->u.syment.n_numaux;
  2357.  
  2358.                   /* S should now point to the .bf of the function.  */
  2359.                   if (s->u.syment.n_numaux)
  2360.                     {
  2361.                       /* The linenumber is stored in the auxent.  */
  2362.                       union internal_auxent *a = &((s + 1)->u.auxent);
  2363.                       line_base = a->x_sym.x_misc.x_lnsz.x_lnno;
  2364.                       *line_ptr = line_base;
  2365.                     }
  2366.                 }
  2367.             }
  2368.           else
  2369.             {
  2370.               if (l->u.offset > offset)
  2371.                 break;
  2372.               *line_ptr = l->line_number + line_base - 1;
  2373.             }
  2374.           l++;
  2375.         }
  2376.  
  2377.       /* If we fell off the end of the loop, then assume that this
  2378.          symbol has no line number info.  Otherwise, symbols with no
  2379.          line number info get reported with the line number of the
  2380.          last line of the last symbol which does have line number
  2381.          info.  We use 0x100 as a slop to account for cases where the
  2382.          last line has executable code.  */
  2383.       if (i >= section->lineno_count
  2384.           && last_value != 0
  2385.           && offset - last_value > 0x100)
  2386.         {
  2387.           *functionname_ptr = NULL;
  2388.           *line_ptr = 0;
  2389.         }
  2390.     }
  2391.  
  2392.   /* Cache the results for the next call.  */
  2393.   if (sec_data == NULL && section->owner == abfd)
  2394.     {
  2395.       amt = sizeof (struct coff_section_tdata);
  2396.       section->used_by_bfd = bfd_zalloc (abfd, amt);
  2397.       sec_data = (struct coff_section_tdata *) section->used_by_bfd;
  2398.     }
  2399.   if (sec_data != NULL)
  2400.     {
  2401.       sec_data->offset = offset;
  2402.       sec_data->i = i - 1;
  2403.       sec_data->function = *functionname_ptr;
  2404.       sec_data->line_base = line_base;
  2405.     }
  2406.  
  2407.   return TRUE;
  2408. }
  2409.  
  2410. bfd_boolean
  2411. coff_find_nearest_line (bfd *abfd,
  2412.                         asection *section,
  2413.                         asymbol **symbols,
  2414.                         bfd_vma offset,
  2415.                         const char **filename_ptr,
  2416.                         const char **functionname_ptr,
  2417.                         unsigned int *line_ptr)
  2418. {
  2419.   return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections,
  2420.                                             section, symbols, offset,
  2421.                                             filename_ptr, functionname_ptr,
  2422.                                             line_ptr);
  2423. }
  2424.  
  2425. bfd_boolean
  2426. coff_find_nearest_line_discriminator (bfd *abfd,
  2427.                                       asection *section,
  2428.                                       asymbol **symbols,
  2429.                                       bfd_vma offset,
  2430.                                       const char **filename_ptr,
  2431.                                       const char **functionname_ptr,
  2432.                                       unsigned int *line_ptr,
  2433.                                       unsigned int *discriminator)
  2434. {
  2435.   *discriminator = 0;
  2436.   return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections,
  2437.                                             section, symbols, offset,
  2438.                                             filename_ptr, functionname_ptr,
  2439.                                             line_ptr);
  2440. }
  2441.  
  2442.  
  2443. bfd_boolean
  2444. coff_find_inliner_info (bfd *abfd,
  2445.                         const char **filename_ptr,
  2446.                         const char **functionname_ptr,
  2447.                         unsigned int *line_ptr)
  2448. {
  2449.   bfd_boolean found;
  2450.  
  2451.   found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr,
  2452.                                          functionname_ptr, line_ptr,
  2453.                                          &coff_data(abfd)->dwarf2_find_line_info);
  2454.   return (found);
  2455. }
  2456.  
  2457. int
  2458. coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info)
  2459. {
  2460.   size_t size;
  2461.  
  2462.   if (!info->relocatable)
  2463.     size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd);
  2464.   else
  2465.     size = bfd_coff_filhsz (abfd);
  2466.  
  2467.   size += abfd->section_count * bfd_coff_scnhsz (abfd);
  2468.   return size;
  2469. }
  2470.  
  2471. /* Change the class of a coff symbol held by BFD.  */
  2472.  
  2473. bfd_boolean
  2474. bfd_coff_set_symbol_class (bfd *         abfd,
  2475.                            asymbol *     symbol,
  2476.                            unsigned int  symbol_class)
  2477. {
  2478.   coff_symbol_type * csym;
  2479.  
  2480.   csym = coff_symbol_from (abfd, symbol);
  2481.   if (csym == NULL)
  2482.     {
  2483.       bfd_set_error (bfd_error_invalid_operation);
  2484.       return FALSE;
  2485.     }
  2486.   else if (csym->native == NULL)
  2487.     {
  2488.       /* This is an alien symbol which no native coff backend data.
  2489.          We cheat here by creating a fake native entry for it and
  2490.          then filling in the class.  This code is based on that in
  2491.          coff_write_alien_symbol().  */
  2492.  
  2493.       combined_entry_type * native;
  2494.       bfd_size_type amt = sizeof (* native);
  2495.  
  2496.       native = (combined_entry_type *) bfd_zalloc (abfd, amt);
  2497.       if (native == NULL)
  2498.         return FALSE;
  2499.  
  2500.       native->u.syment.n_type   = T_NULL;
  2501.       native->u.syment.n_sclass = symbol_class;
  2502.  
  2503.       if (bfd_is_und_section (symbol->section))
  2504.         {
  2505.           native->u.syment.n_scnum = N_UNDEF;
  2506.           native->u.syment.n_value = symbol->value;
  2507.         }
  2508.       else if (bfd_is_com_section (symbol->section))
  2509.         {
  2510.           native->u.syment.n_scnum = N_UNDEF;
  2511.           native->u.syment.n_value = symbol->value;
  2512.         }
  2513.       else
  2514.         {
  2515.           native->u.syment.n_scnum =
  2516.             symbol->section->output_section->target_index;
  2517.           native->u.syment.n_value = (symbol->value
  2518.                                       + symbol->section->output_offset);
  2519.           if (! obj_pe (abfd))
  2520.             native->u.syment.n_value += symbol->section->output_section->vma;
  2521.  
  2522.           /* Copy the any flags from the file header into the symbol.
  2523.              FIXME: Why?  */
  2524.           native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags;
  2525.         }
  2526.  
  2527.       csym->native = native;
  2528.     }
  2529.   else
  2530.     csym->native->u.syment.n_sclass = symbol_class;
  2531.  
  2532.   return TRUE;
  2533. }
  2534.  
  2535. struct coff_comdat_info *
  2536. bfd_coff_get_comdat_section (bfd *abfd, struct bfd_section *sec)
  2537. {
  2538.   if (bfd_get_flavour (abfd) == bfd_target_coff_flavour
  2539.       && coff_section_data (abfd, sec) != NULL)
  2540.     return coff_section_data (abfd, sec)->comdat;
  2541.   else
  2542.     return NULL;
  2543. }
  2544.  
  2545. bfd_boolean
  2546. _bfd_coff_section_already_linked (bfd *abfd,
  2547.                                   asection *sec,
  2548.                                   struct bfd_link_info *info)
  2549. {
  2550.   flagword flags;
  2551.   const char *name, *key;
  2552.   struct bfd_section_already_linked *l;
  2553.   struct bfd_section_already_linked_hash_entry *already_linked_list;
  2554.   struct coff_comdat_info *s_comdat;
  2555.  
  2556.   flags = sec->flags;
  2557.   if ((flags & SEC_LINK_ONCE) == 0)
  2558.     return FALSE;
  2559.  
  2560.   /* The COFF backend linker doesn't support group sections.  */
  2561.   if ((flags & SEC_GROUP) != 0)
  2562.     return FALSE;
  2563.  
  2564.   name = bfd_get_section_name (abfd, sec);
  2565.   s_comdat = bfd_coff_get_comdat_section (abfd, sec);
  2566.  
  2567.   if (s_comdat != NULL)
  2568.     key = s_comdat->name;
  2569.   else
  2570.     {
  2571.       if (CONST_STRNEQ (name, ".gnu.linkonce.")
  2572.           && (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL)
  2573.         key++;
  2574.       else
  2575.         /* FIXME: gcc as of 2011-09 emits sections like .text$<key>,
  2576.            .xdata$<key> and .pdata$<key> only the first of which has a
  2577.            comdat key.  Should these all match the LTO IR key?  */
  2578.         key = name;
  2579.     }
  2580.  
  2581.   already_linked_list = bfd_section_already_linked_table_lookup (key);
  2582.  
  2583.   for (l = already_linked_list->entry; l != NULL; l = l->next)
  2584.     {
  2585.       struct coff_comdat_info *l_comdat;
  2586.  
  2587.       l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec);
  2588.  
  2589.       /* The section names must match, and both sections must be
  2590.          comdat and have the same comdat name, or both sections must
  2591.          be non-comdat.  LTO IR plugin sections are an exception.  They
  2592.          are always named .gnu.linkonce.t.<key> (<key> is some string)
  2593.          and match any comdat section with comdat name of <key>, and
  2594.          any linkonce section with the same suffix, ie.
  2595.          .gnu.linkonce.*.<key>.  */
  2596.       if (((s_comdat != NULL) == (l_comdat != NULL)
  2597.            && strcmp (name, l->sec->name) == 0)
  2598.           || (l->sec->owner->flags & BFD_PLUGIN) != 0)
  2599.         {
  2600.           /* The section has already been linked.  See if we should
  2601.              issue a warning.  */
  2602.           return _bfd_handle_already_linked (sec, l, info);
  2603.         }
  2604.     }
  2605.  
  2606.   /* This is the first section with this name.  Record it.  */
  2607.   if (!bfd_section_already_linked_table_insert (already_linked_list, sec))
  2608.     info->callbacks->einfo (_("%F%P: already_linked_table: %E\n"));
  2609.   return FALSE;
  2610. }
  2611.