gold/fileread.cc

   1 // fileread.cc -- read files for gold
   2
   3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
   4 // Written by Ian Lance Taylor <iant@google.com>.
   5
   6 // This file is part of gold.
   7
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 3 of the License, or
  11 // (at your option) any later version.
  12
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 // MA 02110-1301, USA.
  22
  23 #include "gold.h"
  24
  25 #include <cstring>
  26 #include <cerrno>
  27 #include <fcntl.h>
  28 #include <unistd.h>
  29 #include <sys/mman.h>
  30 #include <sys/uio.h>
  31 #include "filenames.h"
  32
  33 #include "debug.h"
  34 #include "parameters.h"
  35 #include "options.h"
  36 #include "dirsearch.h"
  37 #include "target.h"
  38 #include "binary.h"
  39 #include "fileread.h"
  40
  41 namespace gold
  42 {
  43
  44 // Class File_read::View.
  45
  46 File_read::View::~View()
  47 {
  48   gold_assert(!this->is_locked());
  49   if (!this->mapped_)
  50     delete[] this->data_;
  51   else
  52     {
  53       if (::munmap(const_cast<unsigned char*>(this->data_), this->size_) != 0)
  54         gold_warning(_("munmap failed: %s"), strerror(errno));
  55
  56       File_read::current_mapped_bytes -= this->size_;
  57     }
  58 }
  59
  60 void
  61 File_read::View::lock()
  62 {
  63   ++this->lock_count_;
  64 }
  65
  66 void
  67 File_read::View::unlock()
  68 {
  69   gold_assert(this->lock_count_ > 0);
  70   --this->lock_count_;
  71 }
  72
  73 bool
  74 File_read::View::is_locked()
  75 {
  76   return this->lock_count_ > 0;
  77 }
  78
  79 // Class File_read.
  80
  81 // The File_read static variables.
  82 unsigned long long File_read::total_mapped_bytes;
  83 unsigned long long File_read::current_mapped_bytes;
  84 unsigned long long File_read::maximum_mapped_bytes;
  85
  86 // The File_read class is designed to support file descriptor caching,
  87 // but this is not currently implemented.
  88
  89 File_read::~File_read()
  90 {
  91   gold_assert(this->token_.is_writable());
  92   if (this->descriptor_ >= 0)
  93     {
  94       if (close(this->descriptor_) < 0)
  95         gold_warning(_("close of %s failed: %s"),
  96                      this->name_.c_str(), strerror(errno));
  97       this->descriptor_ = -1;
  98     }
  99   this->name_.clear();
 100   this->clear_views(true);
 101 }
 102
 103 // Open the file.
 104
 105 bool
 106 File_read::open(const Task* task, const std::string& name)
 107 {
 108   gold_assert(this->token_.is_writable()
 109               && this->descriptor_ < 0
 110               && this->name_.empty());
 111   this->name_ = name;
 112
 113   this->descriptor_ = ::open(this->name_.c_str(), O_RDONLY);
 114
 115   if (this->descriptor_ >= 0)
 116     {
 117       struct stat s;
 118       if (::fstat(this->descriptor_, &s) < 0)
 119         gold_error(_("%s: fstat failed: %s"),
 120                    this->name_.c_str(), strerror(errno));
 121       this->size_ = s.st_size;
 122       gold_debug(DEBUG_FILES, "Attempt to open %s succeeded",
 123                  this->name_.c_str());
 124     }
 125
 126   this->token_.add_writer(task);
 127
 128   return this->descriptor_ >= 0;
 129 }
 130
 131 // Open the file with the contents in memory.
 132
 133 bool
 134 File_read::open(const Task* task, const std::string& name,
 135                 const unsigned char* contents, off_t size)
 136 {
 137   gold_assert(this->token_.is_writable()
 138               && this->descriptor_ < 0
 139               && this->name_.empty());
 140   this->name_ = name;
 141   this->contents_ = contents;
 142   this->size_ = size;
 143   this->token_.add_writer(task);
 144   return true;
 145 }
 146
 147 // Release the file.  This is called when we are done with the file in
 148 // a Task.
 149
 150 void
 151 File_read::release()
 152 {
 153   gold_assert(this->is_locked());
 154
 155   File_read::total_mapped_bytes += this->mapped_bytes_;
 156   File_read::current_mapped_bytes += this->mapped_bytes_;
 157   this->mapped_bytes_ = 0;
 158   if (File_read::current_mapped_bytes > File_read::maximum_mapped_bytes)
 159     File_read::maximum_mapped_bytes = File_read::current_mapped_bytes;
 160
 161   // Only clear views if there is only one attached object.  Otherwise
 162   // we waste time trying to clear cached archive views.
 163   if (this->object_count_ <= 1)
 164     this->clear_views(false);
 165
 166   this->released_ = true;
 167 }
 168
 169 // Lock the file.
 170
 171 void
 172 File_read::lock(const Task* task)
 173 {
 174   gold_assert(this->released_);
 175   this->token_.add_writer(task);
 176   this->released_ = false;
 177 }
 178
 179 // Unlock the file.
 180
 181 void
 182 File_read::unlock(const Task* task)
 183 {
 184   this->release();
 185   this->token_.remove_writer(task);
 186 }
 187
 188 // Return whether the file is locked.
 189
 190 bool
 191 File_read::is_locked() const
 192 {
 193   if (!this->token_.is_writable())
 194     return true;
 195   // The file is not locked, so it should have been released.
 196   gold_assert(this->released_);
 197   return false;
 198 }
 199
 200 // See if we have a view which covers the file starting at START for
 201 // SIZE bytes.  Return a pointer to the View if found, NULL if not.
 202 // If BYTESHIFT is not -1U, the returned View must have the specified
 203 // byte shift; otherwise, it may have any byte shift.  If VSHIFTED is
 204 // not NULL, this sets *VSHIFTED to a view which would have worked if
 205 // not for the requested BYTESHIFT.
 206
 207 inline File_read::View*
 208 File_read::find_view(off_t start, section_size_type size,
 209                      unsigned int byteshift, File_read::View** vshifted) const
 210 {
 211   if (vshifted != NULL)
 212     *vshifted = NULL;
 213
 214   off_t page = File_read::page_offset(start);
 215
 216   unsigned int bszero = 0;
 217   Views::const_iterator p = this->views_.upper_bound(std::make_pair(page - 1,
 218                                                                     bszero));
 219
 220   while (p != this->views_.end() && p->first.first <= page)
 221     {
 222       if (p->second->start() <= start
 223           && (p->second->start() + static_cast<off_t>(p->second->size())
 224               >= start + static_cast<off_t>(size)))
 225         {
 226           if (byteshift == -1U || byteshift == p->second->byteshift())
 227             {
 228               p->second->set_accessed();
 229               return p->second;
 230             }
 231
 232           if (vshifted != NULL && *vshifted == NULL)
 233             *vshifted = p->second;
 234         }
 235
 236       ++p;
 237     }
 238
 239   return NULL;
 240 }
 241
 242 // Read SIZE bytes from the file starting at offset START.  Read into
 243 // the buffer at P.
 244
 245 void
 246 File_read::do_read(off_t start, section_size_type size, void* p) const
 247 {
 248   ssize_t bytes;
 249   if (this->contents_ != NULL)
 250     {
 251       bytes = this->size_ - start;
 252       if (static_cast<section_size_type>(bytes) >= size)
 253         {
 254           memcpy(p, this->contents_ + start, size);
 255           return;
 256         }
 257     }
 258   else
 259     {
 260       bytes = ::pread(this->descriptor_, p, size, start);
 261       if (static_cast<section_size_type>(bytes) == size)
 262         return;
 263
 264       if (bytes < 0)
 265         {
 266           gold_fatal(_("%s: pread failed: %s"),
 267                      this->filename().c_str(), strerror(errno));
 268           return;
 269         }
 270     }
 271
 272   gold_fatal(_("%s: file too short: read only %lld of %lld bytes at %lld"),
 273              this->filename().c_str(),
 274              static_cast<long long>(bytes),
 275              static_cast<long long>(size),
 276              static_cast<long long>(start));
 277 }
 278
 279 // Read data from the file.
 280
 281 void
 282 File_read::read(off_t start, section_size_type size, void* p) const
 283 {
 284   const File_read::View* pv = this->find_view(start, size, -1U, NULL);
 285   if (pv != NULL)
 286     {
 287       memcpy(p, pv->data() + (start - pv->start() + pv->byteshift()), size);
 288       return;
 289     }
 290
 291   this->do_read(start, size, p);
 292 }
 293
 294 // Add a new view.  There may already be an existing view at this
 295 // offset.  If there is, the new view will be larger, and should
 296 // replace the old view.
 297
 298 void
 299 File_read::add_view(File_read::View* v)
 300 {
 301   std::pair<Views::iterator, bool> ins =
 302     this->views_.insert(std::make_pair(std::make_pair(v->start(),
 303                                                       v->byteshift()),
 304                                        v));
 305   if (ins.second)
 306     return;
 307
 308   // There was an existing view at this offset.  It must not be large
 309   // enough.  We can't delete it here, since something might be using
 310   // it; we put it on a list to be deleted when the file is unlocked.
 311   File_read::View* vold = ins.first->second;
 312   gold_assert(vold->size() < v->size());
 313   if (vold->should_cache())
 314     {
 315       v->set_cache();
 316       vold->clear_cache();
 317     }
 318   this->saved_views_.push_back(vold);
 319
 320   ins.first->second = v;
 321 }
 322
 323 // Make a new view with a specified byteshift, reading the data from
 324 // the file.
 325
 326 File_read::View*
 327 File_read::make_view(off_t start, section_size_type size,
 328                      unsigned int byteshift, bool cache)
 329 {
 330   gold_assert(size > 0);
 331
 332   off_t poff = File_read::page_offset(start);
 333
 334   section_size_type psize = File_read::pages(size + (start - poff));
 335
 336   if (poff + static_cast<off_t>(psize) >= this->size_)
 337     {
 338       psize = this->size_ - poff;
 339       gold_assert(psize >= size);
 340     }
 341
 342   File_read::View* v;
 343   if (this->contents_ != NULL || byteshift != 0)
 344     {
 345       unsigned char* p = new unsigned char[psize + byteshift];
 346       memset(p, 0, byteshift);
 347       this->do_read(poff, psize, p + byteshift);
 348       v = new File_read::View(poff, psize, p, byteshift, cache, false);
 349     }
 350   else
 351     {
 352       void* p = ::mmap(NULL, psize, PROT_READ, MAP_PRIVATE,
 353                        this->descriptor_, poff);
 354       if (p == MAP_FAILED)
 355         gold_fatal(_("%s: mmap offset %lld size %lld failed: %s"),
 356                    this->filename().c_str(),
 357                    static_cast<long long>(poff),
 358                    static_cast<long long>(psize),
 359                    strerror(errno));
 360
 361       this->mapped_bytes_ += psize;
 362
 363       const unsigned char* pbytes = static_cast<const unsigned char*>(p);
 364       v = new File_read::View(poff, psize, pbytes, 0, cache, true);
 365     }
 366
 367   this->add_view(v);
 368
 369   return v;
 370 }
 371
 372 // Find a View or make a new one, shifted as required by the file
 373 // offset OFFSET and ALIGNED.
 374
 375 File_read::View*
 376 File_read::find_or_make_view(off_t offset, off_t start,
 377                              section_size_type size, bool aligned, bool cache)
 378 {
 379   unsigned int byteshift;
 380   if (offset == 0)
 381     byteshift = 0;
 382   else
 383     {
 384       unsigned int target_size = (!parameters->target_valid()
 385                                   ? 64
 386                                   : parameters->target().get_size());
 387       byteshift = offset & ((target_size / 8) - 1);
 388
 389       // Set BYTESHIFT to the number of dummy bytes which must be
 390       // inserted before the data in order for this data to be
 391       // aligned.
 392       if (byteshift != 0)
 393         byteshift = (target_size / 8) - byteshift;
 394     }
 395
 396   // Try to find a View with the required BYTESHIFT.
 397   File_read::View* vshifted;
 398   File_read::View* v = this->find_view(offset + start, size,
 399                                        aligned ? byteshift : -1U,
 400                                        &vshifted);
 401   if (v != NULL)
 402     {
 403       if (cache)
 404         v->set_cache();
 405       return v;
 406     }
 407
 408   // If VSHIFTED is not NULL, then it has the data we need, but with
 409   // the wrong byteshift.
 410   v = vshifted;
 411   if (v != NULL)
 412     {
 413       gold_assert(aligned);
 414
 415       unsigned char* pbytes = new unsigned char[v->size() + byteshift];
 416       memset(pbytes, 0, byteshift);
 417       memcpy(pbytes + byteshift, v->data() + v->byteshift(), v->size());
 418
 419       File_read::View* shifted_view = new File_read::View(v->start(), v->size(),
 420                                                           pbytes, byteshift,
 421                                                           cache, false);
 422
 423       this->add_view(shifted_view);
 424       return shifted_view;
 425     }
 426
 427   // Make a new view.  If we don't need an aligned view, use a
 428   // byteshift of 0, so that we can use mmap.
 429   return this->make_view(offset + start, size,
 430                          aligned ? byteshift : 0,
 431                          cache);
 432 }
 433
 434 // Get a view into the file.
 435
 436 const unsigned char*
 437 File_read::get_view(off_t offset, off_t start, section_size_type size,
 438                     bool aligned, bool cache)
 439 {
 440   File_read::View* pv = this->find_or_make_view(offset, start, size,
 441                                                 aligned, cache);
 442   return pv->data() + (offset + start - pv->start() + pv->byteshift());
 443 }
 444
 445 File_view*
 446 File_read::get_lasting_view(off_t offset, off_t start, section_size_type size,
 447                             bool aligned, bool cache)
 448 {
 449   File_read::View* pv = this->find_or_make_view(offset, start, size,
 450                                                 aligned, cache);
 451   pv->lock();
 452   return new File_view(*this, pv,
 453                        (pv->data()
 454                         + (offset + start - pv->start() + pv->byteshift())));
 455 }
 456
 457 // Use readv to read COUNT entries from RM starting at START.  BASE
 458 // must be added to all file offsets in RM.
 459
 460 void
 461 File_read::do_readv(off_t base, const Read_multiple& rm, size_t start,
 462                     size_t count)
 463 {
 464   unsigned char discard[File_read::page_size];
 465   iovec iov[File_read::max_readv_entries * 2];
 466   size_t iov_index = 0;
 467
 468   off_t first_offset = rm[start].file_offset;
 469   off_t last_offset = first_offset;
 470   ssize_t want = 0;
 471   for (size_t i = 0; i < count; ++i)
 472     {
 473       const Read_multiple_entry& i_entry(rm[start + i]);
 474
 475       if (i_entry.file_offset > last_offset)
 476         {
 477           size_t skip = i_entry.file_offset - last_offset;
 478           gold_assert(skip <= sizeof discard);
 479
 480           iov[iov_index].iov_base = discard;
 481           iov[iov_index].iov_len = skip;
 482           ++iov_index;
 483
 484           want += skip;
 485         }
 486
 487       iov[iov_index].iov_base = i_entry.buffer;
 488       iov[iov_index].iov_len = i_entry.size;
 489       ++iov_index;
 490
 491       want += i_entry.size;
 492
 493       last_offset = i_entry.file_offset + i_entry.size;
 494     }
 495
 496   gold_assert(iov_index < sizeof iov / sizeof iov[0]);
 497
 498   if (::lseek(this->descriptor_, base + first_offset, SEEK_SET) < 0)
 499     gold_fatal(_("%s: lseek failed: %s"),
 500                this->filename().c_str(), strerror(errno));
 501
 502   ssize_t got = ::readv(this->descriptor_, iov, iov_index);
 503
 504   if (got < 0)
 505     gold_fatal(_("%s: readv failed: %s"),
 506                this->filename().c_str(), strerror(errno));
 507   if (got != want)
 508     gold_fatal(_("%s: file too short: read only %zd of %zd bytes at %lld"),
 509                this->filename().c_str(),
 510                got, want, static_cast<long long>(base + first_offset));
 511 }
 512
 513 // Read several pieces of data from the file.
 514
 515 void
 516 File_read::read_multiple(off_t base, const Read_multiple& rm)
 517 {
 518   size_t count = rm.size();
 519   size_t i = 0;
 520   while (i < count)
 521     {
 522       // Find up to MAX_READV_ENTRIES consecutive entries which are
 523       // less than one page apart.
 524       const Read_multiple_entry& i_entry(rm[i]);
 525       off_t i_off = i_entry.file_offset;
 526       off_t end_off = i_off + i_entry.size;
 527       size_t j;
 528       for (j = i + 1; j < count; ++j)
 529         {
 530           if (j - i >= File_read::max_readv_entries)
 531             break;
 532           const Read_multiple_entry& j_entry(rm[j]);
 533           off_t j_off = j_entry.file_offset;
 534           gold_assert(j_off >= end_off);
 535           off_t j_end_off = j_off + j_entry.size;
 536           if (j_end_off - end_off >= File_read::page_size)
 537             break;
 538           end_off = j_end_off;
 539         }
 540
 541       if (j == i + 1)
 542         this->read(base + i_off, i_entry.size, i_entry.buffer);
 543       else
 544         {
 545           File_read::View* view = this->find_view(base + i_off,
 546                                                   end_off - i_off,
 547                                                   -1U, NULL);
 548           if (view == NULL)
 549             this->do_readv(base, rm, i, j - i);
 550           else
 551             {
 552               const unsigned char* v = (view->data()
 553                                         + (base + i_off - view->start()
 554                                            + view->byteshift()));
 555               for (size_t k = i; k < j; ++k)
 556                 {
 557                   const Read_multiple_entry& k_entry(rm[k]);
 558                   gold_assert((convert_to_section_size_type(k_entry.file_offset
 559                                                            - i_off)
 560                                + k_entry.size)
 561                               <= convert_to_section_size_type(end_off
 562                                                               - i_off));
 563                   memcpy(k_entry.buffer,
 564                          v + (k_entry.file_offset - i_off),
 565                          k_entry.size);
 566                 }
 567             }
 568         }
 569
 570       i = j;
 571     }
 572 }
 573
 574 // Mark all views as no longer cached.
 575
 576 void
 577 File_read::clear_view_cache_marks()
 578 {
 579   // Just ignore this if there are multiple objects associated with
 580   // the file.  Otherwise we will wind up uncaching and freeing some
 581   // views for other objects.
 582   if (this->object_count_ > 1)
 583     return;
 584
 585   for (Views::iterator p = this->views_.begin();
 586        p != this->views_.end();
 587        ++p)
 588     p->second->clear_cache();
 589   for (Saved_views::iterator p = this->saved_views_.begin();
 590        p != this->saved_views_.end();
 591        ++p)
 592     (*p)->clear_cache();
 593 }
 594
 595 // Remove all the file views.  For a file which has multiple
 596 // associated objects (i.e., an archive), we keep accessed views
 597 // around until next time, in the hopes that they will be useful for
 598 // the next object.
 599
 600 void
 601 File_read::clear_views(bool destroying)
 602 {
 603   Views::iterator p = this->views_.begin();
 604   while (p != this->views_.end())
 605     {
 606       bool should_delete;
 607       if (p->second->is_locked())
 608         should_delete = false;
 609       else if (destroying)
 610         should_delete = true;
 611       else if (p->second->should_cache())
 612         should_delete = false;
 613       else if (this->object_count_ > 1 && p->second->accessed())
 614         should_delete = false;
 615       else
 616         should_delete = true;
 617
 618       if (should_delete)
 619         {
 620           delete p->second;
 621
 622           // map::erase invalidates only the iterator to the deleted
 623           // element.
 624           Views::iterator pe = p;
 625           ++p;
 626           this->views_.erase(pe);
 627         }
 628       else
 629         {
 630           gold_assert(!destroying);
 631           p->second->clear_accessed();
 632           ++p;
 633         }
 634     }
 635
 636   Saved_views::iterator q = this->saved_views_.begin();
 637   while (q != this->saved_views_.end())
 638     {
 639       if (!(*q)->is_locked())
 640         {
 641           delete *q;
 642           q = this->saved_views_.erase(q);
 643         }
 644       else
 645         {
 646           gold_assert(!destroying);
 647           ++q;
 648         }
 649     }
 650 }
 651
 652 // Print statistical information to stderr.  This is used for --stats.
 653
 654 void
 655 File_read::print_stats()
 656 {
 657   fprintf(stderr, _("%s: total bytes mapped for read: %llu\n"),
 658           program_name, File_read::total_mapped_bytes);
 659   fprintf(stderr, _("%s: maximum bytes mapped for read at one time: %llu\n"),
 660           program_name, File_read::maximum_mapped_bytes);
 661 }
 662
 663 // Class File_view.
 664
 665 File_view::~File_view()
 666 {
 667   gold_assert(this->file_.is_locked());
 668   this->view_->unlock();
 669 }
 670
 671 // Class Input_file.
 672
 673 // Create a file for testing.
 674
 675 Input_file::Input_file(const Task* task, const char* name,
 676                        const unsigned char* contents, off_t size)
 677   : file_()
 678 {
 679   this->input_argument_ =
 680     new Input_file_argument(name, false, "", false,
 681                             Position_dependent_options());
 682   bool ok = file_.open(task, name, contents, size);
 683   gold_assert(ok);
 684 }
 685
 686 // Return the position dependent options in force for this file.
 687
 688 const Position_dependent_options&
 689 Input_file::options() const
 690 {
 691   return this->input_argument_->options();
 692 }
 693
 694 // Return the name given by the user.  For -lc this will return "c".
 695
 696 const char*
 697 Input_file::name() const
 698 {
 699   return this->input_argument_->name();
 700 }
 701
 702 // Return whether we are only reading symbols.
 703
 704 bool
 705 Input_file::just_symbols() const
 706 {
 707   return this->input_argument_->just_symbols();
 708 }
 709
 710 // Open the file.
 711
 712 // If the filename is not absolute, we assume it is in the current
 713 // directory *except* when:
 714 //    A) input_argument_->is_lib() is true; or
 715 //    B) input_argument_->extra_search_path() is not empty.
 716 // In both cases, we look in extra_search_path + library_path to find
 717 // the file location, rather than the current directory.
 718
 719 bool
 720 Input_file::open(const General_options& options, const Dirsearch& dirpath,
 721                  const Task* task)
 722 {
 723   std::string name;
 724
 725   // Case 1: name is an absolute file, just try to open it
 726   // Case 2: name is relative but is_lib is false and extra_search_path
 727   //         is empty
 728   if (IS_ABSOLUTE_PATH (this->input_argument_->name())
 729       || (!this->input_argument_->is_lib()
 730           && this->input_argument_->extra_search_path() == NULL))
 731     {
 732       name = this->input_argument_->name();
 733       this->found_name_ = name;
 734     }
 735   // Case 3: is_lib is true
 736   else if (this->input_argument_->is_lib())
 737     {
 738       // We don't yet support extra_search_path with -l.
 739       gold_assert(this->input_argument_->extra_search_path() == NULL);
 740       std::string n1("lib");
 741       n1 += this->input_argument_->name();
 742       std::string n2;
 743       if (options.is_static()
 744           || !this->input_argument_->options().Bdynamic())
 745         n1 += ".a";
 746       else
 747         {
 748           n2 = n1 + ".a";
 749           n1 += ".so";
 750         }
 751       name = dirpath.find(n1, n2, &this->is_in_sysroot_);
 752       if (name.empty())
 753         {
 754           gold_error(_("cannot find -l%s"),
 755                      this->input_argument_->name());
 756           return false;
 757         }
 758       if (n2.empty() || name[name.length() - 1] == 'o')
 759         this->found_name_ = n1;
 760       else
 761         this->found_name_ = n2;
 762     }
 763   // Case 4: extra_search_path is not empty
 764   else
 765     {
 766       gold_assert(this->input_argument_->extra_search_path() != NULL);
 767
 768       // First, check extra_search_path.
 769       name = this->input_argument_->extra_search_path();
 770       if (!IS_DIR_SEPARATOR (name[name.length() - 1]))
 771         name += '/';
 772       name += this->input_argument_->name();
 773       struct stat dummy_stat;
 774       if (::stat(name.c_str(), &dummy_stat) < 0)
 775         {
 776           // extra_search_path failed, so check the normal search-path.
 777           name = dirpath.find(this->input_argument_->name(), "",
 778                               &this->is_in_sysroot_);
 779           if (name.empty())
 780             {
 781               gold_error(_("cannot find %s"),
 782                          this->input_argument_->name());
 783               return false;
 784             }
 785         }
 786       this->found_name_ = this->input_argument_->name();
 787     }
 788
 789   // Now that we've figured out where the file lives, try to open it.
 790
 791   General_options::Object_format format =
 792     this->input_argument_->options().format_enum();
 793   bool ok;
 794   if (format == General_options::OBJECT_FORMAT_ELF)
 795     ok = this->file_.open(task, name);
 796   else
 797     {
 798       gold_assert(format == General_options::OBJECT_FORMAT_BINARY);
 799       ok = this->open_binary(options, task, name);
 800     }
 801
 802   if (!ok)
 803     {
 804       gold_error(_("cannot open %s: %s"),
 805                  name.c_str(), strerror(errno));
 806       return false;
 807     }
 808
 809   return true;
 810 }
 811
 812 // Open a file for --format binary.
 813
 814 bool
 815 Input_file::open_binary(const General_options&,
 816                         const Task* task, const std::string& name)
 817 {
 818   // In order to open a binary file, we need machine code, size, and
 819   // endianness.  We may not have a valid target at this point, in
 820   // which case we use the default target.
 821   const Target* target;
 822   if (parameters->target_valid())
 823     target = &parameters->target();
 824   else
 825     target = &parameters->default_target();
 826
 827   Binary_to_elf binary_to_elf(target->machine_code(),
 828                               target->get_size(),
 829                               target->is_big_endian(),
 830                               name);
 831   if (!binary_to_elf.convert(task))
 832     return false;
 833   return this->file_.open(task, name, binary_to_elf.converted_data_leak(),
 834                           binary_to_elf.converted_size());
 835 }
 836
 837 } // End namespace gold.