Subversion Repositories openrisc

# This shell script emits a C file. -*- C -*-

# It does some substitutions.

# This file is now misnamed, because it supports both 32 bit and 64 bit

# ELF emulations.

test -z "${ELFSIZE}" && ELFSIZE=32

if [ -z "$MACHINE" ]; then

  OUTPUT_ARCH=${ARCH}

else

  OUTPUT_ARCH=${ARCH}:${MACHINE}

fi

fragment <

/* This file is is generated by a shell script.  DO NOT EDIT! */

/* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME}

   Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,

   2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.

   Written by Steve Chamberlain 

   ELF support by Ian Lance Taylor 

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,

   MA 02110-1301, USA.  */

#define TARGET_IS_${EMULATION_NAME}

#include "sysdep.h"

#include "bfd.h"

#include "libiberty.h"

#include "safe-ctype.h"

#include "getopt.h"

#include "md5.h"

#include "sha1.h"

#include 

#include "bfdlink.h"

#include "ld.h"

#include "ldmain.h"

#include "ldmisc.h"

#include "ldexp.h"

#include "ldlang.h"

#include "ldfile.h"

#include "ldemul.h"

#include 

#include "elf/common.h"

#include "elf-bfd.h"

/* Declare functions used by various EXTRA_EM_FILEs.  */

static void gld${EMULATION_NAME}_before_parse (void);

static void gld${EMULATION_NAME}_after_open (void);

static void gld${EMULATION_NAME}_before_allocation (void);

static bfd_boolean gld${EMULATION_NAME}_place_orphan (asection *s);

static void gld${EMULATION_NAME}_finish (void);

EOF

if [ "x${USE_LIBPATH}" = xyes ] ; then

  case ${target} in

    *-*-linux-* | *-*-k*bsd*-*)

  fragment <

#ifdef HAVE_GLOB

#include 

#endif

EOF

    ;;

  esac

fi

# Import any needed special functions and/or overrides.

#

source_em ${srcdir}/emultempl/elf-generic.em

if test -n "$EXTRA_EM_FILE" ; then

  source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em

fi

# Functions in this file can be overridden by setting the LDEMUL_* shell

# variables.  If the name of the overriding function is the same as is

# defined in this file, then don't output this file's version.

# If a different overriding name is given then output the standard function

# as presumably it is called from the overriding function.

#

if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then

fragment <

static void

gld${EMULATION_NAME}_before_parse (void)

{

  ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`);

  config.dynamic_link = ${DYNAMIC_LINK-TRUE};

  config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;

}

EOF

fi

if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then

fragment <

/* Handle as_needed DT_NEEDED.  */

static bfd_boolean

gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry)

{

  int class = 0;

  /* Tell the ELF linker that we don't want the output file to have a

     DT_NEEDED entry for this file, unless it is used to resolve

     references in a regular object.  */

  if (entry->as_needed)

    class = DYN_AS_NEEDED;

  /* Tell the ELF linker that we don't want the output file to have a

     DT_NEEDED entry for any dynamic library in DT_NEEDED tags from

     this file at all.  */

  if (!entry->add_needed)

    class |= DYN_NO_ADD_NEEDED;

  if (entry->just_syms_flag

      && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0)

    einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"),

           entry->the_bfd);

  if (!class

      || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0)

    return FALSE;

  bfd_elf_set_dyn_lib_class (entry->the_bfd, class);

  /* Continue on with normal load_symbols processing.  */

  return FALSE;

}

EOF

fi

fragment <

/* These variables are required to pass information back and forth

   between after_open and check_needed and stat_needed and vercheck.  */

static struct bfd_link_needed_list *global_needed;

static struct stat global_stat;

static lang_input_statement_type *global_found;

static struct bfd_link_needed_list *global_vercheck_needed;

static bfd_boolean global_vercheck_failed;

/* On Linux, it's possible to have different versions of the same

   shared library linked against different versions of libc.  The

   dynamic linker somehow tags which libc version to use in

   /etc/ld.so.cache, and, based on the libc that it sees in the

   executable, chooses which version of the shared library to use.

   We try to do a similar check here by checking whether this shared

   library needs any other shared libraries which may conflict with

   libraries we have already included in the link.  If it does, we

   skip it, and try to find another shared library farther on down the

   link path.

   This is called via lang_for_each_input_file.

   GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object

   which we are checking.  This sets GLOBAL_VERCHECK_FAILED if we find

   a conflicting version.  */

static void

gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s)

{

  const char *soname;

  struct bfd_link_needed_list *l;

  if (global_vercheck_failed)

    return;

  if (s->the_bfd == NULL

      || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0)

    return;

  soname = bfd_elf_get_dt_soname (s->the_bfd);

  if (soname == NULL)

    soname = lbasename (bfd_get_filename (s->the_bfd));

  for (l = global_vercheck_needed; l != NULL; l = l->next)

    {

      const char *suffix;

      if (strcmp (soname, l->name) == 0)

        {

          /* Probably can't happen, but it's an easy check.  */

          continue;

        }

      if (strchr (l->name, '/') != NULL)

        continue;

      suffix = strstr (l->name, ".so.");

      if (suffix == NULL)

        continue;

      suffix += sizeof ".so." - 1;

      if (strncmp (soname, l->name, suffix - l->name) == 0)

        {

          /* Here we know that S is a dynamic object FOO.SO.VER1, and

             the object we are considering needs a dynamic object

             FOO.SO.VER2, and VER1 and VER2 are different.  This

             appears to be a version mismatch, so we tell the caller

             to try a different version of this library.  */

          global_vercheck_failed = TRUE;

          return;

        }

    }

}

/* See if an input file matches a DT_NEEDED entry by running stat on

   the file.  */

static void

gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s)

{

  struct stat st;

  const char *suffix;

  const char *soname;

  if (global_found != NULL)

    return;

  if (s->the_bfd == NULL)

    return;

  /* If this input file was an as-needed entry, and wasn't found to be

     needed at the stage it was linked, then don't say we have loaded it.  */

  if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)

    return;

  if (bfd_stat (s->the_bfd, &st) != 0)

    {

      einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd);

      return;

    }

  /* Some operating systems, e.g. Windows, do not provide a meaningful

     st_ino; they always set it to zero.  (Windows does provide a

     meaningful st_dev.)  Do not indicate a duplicate library in that

     case.  While there is no guarantee that a system that provides

     meaningful inode numbers will never set st_ino to zero, this is

     merely an optimization, so we do not need to worry about false

     negatives.  */

  if (st.st_dev == global_stat.st_dev

      && st.st_ino == global_stat.st_ino

      && st.st_ino != 0)

    {

      global_found = s;

      return;

    }

  /* We issue a warning if it looks like we are including two

     different versions of the same shared library.  For example,

     there may be a problem if -lc picks up libc.so.6 but some other

     shared library has a DT_NEEDED entry of libc.so.5.  This is a

     heuristic test, and it will only work if the name looks like

     NAME.so.VERSION.  FIXME: Depending on file names is error-prone.

     If we really want to issue warnings about mixing version numbers

     of shared libraries, we need to find a better way.  */

  if (strchr (global_needed->name, '/') != NULL)

    return;

  suffix = strstr (global_needed->name, ".so.");

  if (suffix == NULL)

    return;

  suffix += sizeof ".so." - 1;

  soname = bfd_elf_get_dt_soname (s->the_bfd);

  if (soname == NULL)

    soname = lbasename (s->filename);

  if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0)

    einfo ("%P: warning: %s, needed by %B, may conflict with %s\n",

           global_needed->name, global_needed->by, soname);

}

struct dt_needed

{

  bfd *by;

  const char *name;

};

/* This function is called for each possible name for a dynamic object

   named by a DT_NEEDED entry.  The FORCE parameter indicates whether

   to skip the check for a conflicting version.  */

static bfd_boolean

gld${EMULATION_NAME}_try_needed (struct dt_needed *needed,

                                 int force)

{

  bfd *abfd;

  const char *name = needed->name;

  const char *soname;

  int class;

  abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd));

  if (abfd == NULL)

    return FALSE;

  if (! bfd_check_format (abfd, bfd_object))

    {

      bfd_close (abfd);

      return FALSE;

    }

  if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0)

    {

      bfd_close (abfd);

      return FALSE;

    }

  /* For DT_NEEDED, they have to match.  */

  if (abfd->xvec != link_info.output_bfd->xvec)

    {

      bfd_close (abfd);

      return FALSE;

    }

  /* Check whether this object would include any conflicting library

     versions.  If FORCE is set, then we skip this check; we use this

     the second time around, if we couldn't find any compatible

     instance of the shared library.  */

  if (! force)

    {

      struct bfd_link_needed_list *needed;

      if (! bfd_elf_get_bfd_needed_list (abfd, &needed))

        einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd);

      if (needed != NULL)

        {

          global_vercheck_needed = needed;

          global_vercheck_failed = FALSE;

          lang_for_each_input_file (gld${EMULATION_NAME}_vercheck);

          if (global_vercheck_failed)

            {

              bfd_close (abfd);

              /* Return FALSE to force the caller to move on to try

                 another file on the search path.  */

              return FALSE;

            }

          /* But wait!  It gets much worse.  On Linux, if a shared

             library does not use libc at all, we are supposed to skip

             it the first time around in case we encounter a shared

             library later on with the same name which does use the

             version of libc that we want.  This is much too horrible

             to use on any system other than Linux.  */

EOF

case ${target} in

  *-*-linux-* | *-*-k*bsd*-*)

    fragment <

          {

            struct bfd_link_needed_list *l;

            for (l = needed; l != NULL; l = l->next)

              if (CONST_STRNEQ (l->name, "libc.so"))

                break;

            if (l == NULL)

              {

                bfd_close (abfd);

                return FALSE;

              }

          }

EOF

    ;;

esac

fragment <

        }

    }

  /* We've found a dynamic object matching the DT_NEEDED entry.  */

  /* We have already checked that there is no other input file of the

     same name.  We must now check again that we are not including the

     same file twice.  We need to do this because on many systems

     libc.so is a symlink to, e.g., libc.so.1.  The SONAME entry will

     reference libc.so.1.  If we have already included libc.so, we

     don't want to include libc.so.1 if they are the same file, and we

     can only check that using stat.  */

  if (bfd_stat (abfd, &global_stat) != 0)

    einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd);

  /* First strip off everything before the last '/'.  */

  soname = lbasename (abfd->filename);

  if (trace_file_tries)

    info_msg (_("found %s at %s\n"), soname, name);

  global_found = NULL;

  lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed);

  if (global_found != NULL)

    {

      /* Return TRUE to indicate that we found the file, even though

         we aren't going to do anything with it.  */

      return TRUE;

    }

  /* Specify the soname to use.  */

  bfd_elf_set_dt_needed_name (abfd, soname);

  /* Tell the ELF linker that we don't want the output file to have a

     DT_NEEDED entry for this file, unless it is used to resolve

     references in a regular object.  */

  class = DYN_DT_NEEDED;

  /* Tell the ELF linker that we don't want the output file to have a

     DT_NEEDED entry for this file at all if the entry is from a file

     with DYN_NO_ADD_NEEDED.  */

  if (needed->by != NULL

      && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0)

    class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED;

  bfd_elf_set_dyn_lib_class (abfd, class);

  /* Add this file into the symbol table.  */

  if (! bfd_link_add_symbols (abfd, &link_info))

    einfo ("%F%B: could not read symbols: %E\n", abfd);

  return TRUE;

}

/* Search for a needed file in a path.  */

static bfd_boolean

gld${EMULATION_NAME}_search_needed (const char *path,

                                    struct dt_needed *n, int force)

{

  const char *s;

  const char *name = n->name;

  size_t len;

  struct dt_needed needed;

  if (name[0] == '/')

    return gld${EMULATION_NAME}_try_needed (n, force);

  if (path == NULL || *path == '\0')

    return FALSE;

  needed.by = n->by;

  needed.name = n->name;

  len = strlen (name);

  while (1)

    {

      char *filename, *sset;

      s = strchr (path, config.rpath_separator);

      if (s == NULL)

        s = path + strlen (path);

      filename = (char *) xmalloc (s - path + len + 2);

      if (s == path)

        sset = filename;

      else

        {

          memcpy (filename, path, s - path);

          filename[s - path] = '/';

          sset = filename + (s - path) + 1;

        }

      strcpy (sset, name);

      needed.name = filename;

      if (gld${EMULATION_NAME}_try_needed (&needed, force))

        return TRUE;

      free (filename);

      if (*s == '\0')

        break;

      path = s + 1;

    }

  return FALSE;

}

EOF

if [ "x${USE_LIBPATH}" = xyes ] ; then

  fragment <

/* Add the sysroot to every entry in a path separated by

   config.rpath_separator.  */

static char *

gld${EMULATION_NAME}_add_sysroot (const char *path)

{

  int len, colons, i;

  char *ret, *p;

  len = strlen (path);

  colons = 0;

  i = 0;

  while (path[i])

    if (path[i++] == config.rpath_separator)

      colons++;

  if (path[i])

    colons++;

  len = len + (colons + 1) * strlen (ld_sysroot);

  ret = xmalloc (len + 1);

  strcpy (ret, ld_sysroot);

  p = ret + strlen (ret);

  i = 0;

  while (path[i])

    if (path[i] == config.rpath_separator)

      {

        *p++ = path[i++];

        strcpy (p, ld_sysroot);

        p = p + strlen (p);

      }

    else

      *p++ = path[i++];

  *p = 0;

  return ret;

}

EOF

  case ${target} in

    *-*-freebsd* | *-*-dragonfly*)

      fragment <

/* Read the system search path the FreeBSD way rather than the Linux way.  */

#ifdef HAVE_ELF_HINTS_H

#include 

#else

#include "elf-hints-local.h"

#endif

static bfd_boolean

gld${EMULATION_NAME}_check_ld_elf_hints (const char *name, int force)

{

  static bfd_boolean initialized;

  static char *ld_elf_hints;

  struct dt_needed needed;

  if (!initialized)

    {

      FILE *f;

      char *tmppath;

      tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL);

      f = fopen (tmppath, FOPEN_RB);

      free (tmppath);

      if (f != NULL)

        {

          struct elfhints_hdr hdr;

          if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr)

              && hdr.magic == ELFHINTS_MAGIC

              && hdr.version == 1)

            {

              if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1)

                {

                  char *b;

                  b = xmalloc (hdr.dirlistlen + 1);

                  if (fread (b, 1, hdr.dirlistlen + 1, f) ==

                      hdr.dirlistlen + 1)

                    ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b);

                  free (b);

                }

            }

          fclose (f);

        }

      initialized = TRUE;

    }

  if (ld_elf_hints == NULL)

    return FALSE;

  needed.by = NULL;

  needed.name = name;

  return gld${EMULATION_NAME}_search_needed (ld_elf_hints, & needed,

                                             force);

}

EOF

    # FreeBSD

    ;;

    *-*-linux-* | *-*-k*bsd*-*)

      fragment <

/* For a native linker, check the file /etc/ld.so.conf for directories

   in which we may find shared libraries.  /etc/ld.so.conf is really

   only meaningful on Linux.  */

struct gld${EMULATION_NAME}_ld_so_conf

{

  char *path;

  size_t len, alloc;

};

static bfd_boolean

gld${EMULATION_NAME}_parse_ld_so_conf

     (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename);

static void

gld${EMULATION_NAME}_parse_ld_so_conf_include

     (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename,

      const char *pattern)

{

  char *newp = NULL;

#ifdef HAVE_GLOB

  glob_t gl;

#endif

  if (pattern[0] != '/')

    {

      char *p = strrchr (filename, '/');

      size_t patlen = strlen (pattern) + 1;

      newp = xmalloc (p - filename + 1 + patlen);

      memcpy (newp, filename, p - filename + 1);

      memcpy (newp + (p - filename + 1), pattern, patlen);

      pattern = newp;

    }

#ifdef HAVE_GLOB

  if (glob (pattern, 0, NULL, &gl) == 0)

    {

      size_t i;

      for (i = 0; i < gl.gl_pathc; ++i)

        gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]);

      globfree (&gl);

    }

#else

  /* If we do not have glob, treat the pattern as a literal filename.  */

  gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern);

#endif

  if (newp)

    free (newp);

}

static bfd_boolean

gld${EMULATION_NAME}_parse_ld_so_conf

     (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename)

{

  FILE *f = fopen (filename, FOPEN_RT);

  char *line;

  size_t linelen;

  if (f == NULL)

    return FALSE;

  linelen = 256;

  line = xmalloc (linelen);

  do

    {

      char *p = line, *q;

      /* Normally this would use getline(3), but we need to be portable.  */

      while ((q = fgets (p, linelen - (p - line), f)) != NULL

             && strlen (q) == linelen - (p - line) - 1

             && line[linelen - 2] != '\n')

        {

          line = xrealloc (line, 2 * linelen);

          p = line + linelen - 1;

          linelen += linelen;

        }

      if (q == NULL && p == line)

        break;

      p = strchr (line, '\n');

      if (p)

        *p = '\0';

      /* Because the file format does not know any form of quoting we

         can search forward for the next '#' character and if found

         make it terminating the line.  */

      p = strchr (line, '#');

      if (p)

        *p = '\0';

      /* Remove leading whitespace.  NUL is no whitespace character.  */

      p = line;

      while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v')

        ++p;

      /* If the line is blank it is ignored.  */

      if (p[0] == '\0')

        continue;

      if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t'))

        {

          char *dir, c;

          p += 8;

          do

            {

              while (*p == ' ' || *p == '\t')

                ++p;

              if (*p == '\0')

                break;

              dir = p;

              while (*p != ' ' && *p != '\t' && *p)

                ++p;

              c = *p;

              *p++ = '\0';

              if (dir[0] != '\0')

                gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename,

                                                               dir);

            }

          while (c != '\0');

        }

      else

        {

          char *dir = p;

          while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f'

                 && *p != '\r' && *p != '\v')

            ++p;

          while (p != dir && p[-1] == '/')

            --p;

          if (info->path == NULL)

            {

              info->alloc = p - dir + 1 + 256;

              info->path = xmalloc (info->alloc);

              info->len = 0;

            }

          else

            {

              if (info->len + 1 + (p - dir) >= info->alloc)

                {

                  info->alloc += p - dir + 256;

                  info->path = xrealloc (info->path, info->alloc);

                }

              info->path[info->len++] = config.rpath_separator;

            }

          memcpy (info->path + info->len, dir, p - dir);

          info->len += p - dir;

          info->path[info->len] = '\0';

        }

    }

  while (! feof (f));

  free (line);

  fclose (f);

  return TRUE;

}

static bfd_boolean

gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force)

{

  static bfd_boolean initialized;

  static char *ld_so_conf;

  struct dt_needed needed;

  if (! initialized)

    {

      char *tmppath;

      struct gld${EMULATION_NAME}_ld_so_conf info;

      info.path = NULL;

      info.len = info.alloc = 0;

      tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",

                        (const char *) NULL);

      if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))

        {

          free (tmppath);

          tmppath = concat (ld_sysroot, "/etc/ld.so.conf",

                            (const char *) NULL);

          gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath);

        }

      free (tmppath);

      if (info.path)

        {

          char *d = gld${EMULATION_NAME}_add_sysroot (info.path);

          free (info.path);

          ld_so_conf = d;

        }

      initialized = TRUE;

    }

  if (ld_so_conf == NULL)

    return FALSE;

  needed.by = NULL;

  needed.name = name;

  return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force);

}

EOF

    # Linux

    ;;

  esac

fi

fragment <

/* See if an input file matches a DT_NEEDED entry by name.  */

static void

gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s)

{

  const char *soname;

  /* Stop looking if we've found a loaded lib.  */

  if (global_found != NULL

      && (bfd_elf_get_dyn_lib_class (global_found->the_bfd)

          & DYN_AS_NEEDED) == 0)

    return;

  if (s->filename == NULL || s->the_bfd == NULL)

    return;

  /* Don't look for a second non-loaded as-needed lib.  */

  if (global_found != NULL

      && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)

    return;

  if (strcmp (s->filename, global_needed->name) == 0)

    {

      global_found = s;

      return;

    }

  if (s->search_dirs_flag)

    {

      const char *f = strrchr (s->filename, '/');

      if (f != NULL

          && strcmp (f + 1, global_needed->name) == 0)

        {

          global_found = s;

          return;

        }

    }

  soname = bfd_elf_get_dt_soname (s->the_bfd);

  if (soname != NULL

      && strcmp (soname, global_needed->name) == 0)

    {

      global_found = s;

      return;

    }

}

EOF

if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then

fragment <

static bfd_size_type

gld${EMULATION_NAME}_id_note_section_size (bfd *abfd,

                                           struct bfd_link_info *link_info)

{

  const char *style = link_info->emit_note_gnu_build_id;

  bfd_size_type size;

  abfd = abfd;

  size = offsetof (Elf_External_Note, name[sizeof "GNU"]);

  size = (size + 3) & -(bfd_size_type) 4;

  if (!strcmp (style, "md5") || !strcmp (style, "uuid"))

    size += 128 / 8;

  else if (!strcmp (style, "sha1"))

    size += 160 / 8;

  else if (!strncmp (style, "0x", 2))

    {

      /* ID is in string form (hex).  Convert to bits.  */

      const char *id = style + 2;

      do

        {

          if (ISXDIGIT (id[0]) && ISXDIGIT (id[1]))

            {

              ++size;

              id += 2;

            }

          else if (*id == '-' || *id == ':')

            ++id;

          else

            {

              size = 0;

              break;

            }

        } while (*id != '\0');

    }

  else

    size = 0;

  return size;

}

static unsigned char

read_hex (const char xdigit)

{

  if (ISDIGIT (xdigit))

    return xdigit - '0';

  if (ISUPPER (xdigit))

    return xdigit - 'A' + 0xa;

  if (ISLOWER (xdigit))

    return xdigit - 'a' + 0xa;

  abort ();

  return 0;

}

struct build_id_info

{

  const char *style;

  asection *sec;

};

static bfd_boolean

gld${EMULATION_NAME}_write_build_id_section (bfd *abfd)

{

  const struct elf_backend_data *bed = get_elf_backend_data (abfd);

  struct build_id_info *info =

    elf_tdata (abfd)->after_write_object_contents_info;

  asection *asec;

  Elf_Internal_Shdr *i_shdr;

  unsigned char *contents, *id_bits;