oops - acccidentally omitted from loongson 3a check-in.
[binutils.git] / gold / fileread.cc
bloba16738a0d593531271af644f6ce4439fb032faed
1 // fileread.cc -- read files for gold
3 // Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
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.
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.
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.
23 #include "gold.h"
25 #include <cstring>
26 #include <cerrno>
27 #include <fcntl.h>
28 #include <unistd.h>
29 #include <sys/mman.h>
31 #ifdef HAVE_READV
32 #include <sys/uio.h>
33 #endif
35 #include <sys/stat.h>
36 #include "filenames.h"
38 #include "debug.h"
39 #include "parameters.h"
40 #include "options.h"
41 #include "dirsearch.h"
42 #include "target.h"
43 #include "binary.h"
44 #include "descriptors.h"
45 #include "gold-threads.h"
46 #include "fileread.h"
48 #ifndef HAVE_READV
49 struct iovec { void* iov_base; size_t iov_len; };
50 ssize_t
51 readv(int, const iovec*, int)
53 gold_unreachable();
55 #endif
57 namespace gold
60 // Class File_read::View.
62 File_read::View::~View()
64 gold_assert(!this->is_locked());
65 switch (this->data_ownership_)
67 case DATA_ALLOCATED_ARRAY:
68 delete[] this->data_;
69 break;
70 case DATA_MMAPPED:
71 if (::munmap(const_cast<unsigned char*>(this->data_), this->size_) != 0)
72 gold_warning(_("munmap failed: %s"), strerror(errno));
73 File_read::current_mapped_bytes -= this->size_;
74 break;
75 case DATA_NOT_OWNED:
76 break;
77 default:
78 gold_unreachable();
82 void
83 File_read::View::lock()
85 ++this->lock_count_;
88 void
89 File_read::View::unlock()
91 gold_assert(this->lock_count_ > 0);
92 --this->lock_count_;
95 bool
96 File_read::View::is_locked()
98 return this->lock_count_ > 0;
101 // Class File_read.
103 // A lock for the File_read static variables.
104 static Lock* file_counts_lock = NULL;
105 static Initialize_lock file_counts_initialize_lock(&file_counts_lock);
107 // The File_read static variables.
108 unsigned long long File_read::total_mapped_bytes;
109 unsigned long long File_read::current_mapped_bytes;
110 unsigned long long File_read::maximum_mapped_bytes;
112 File_read::~File_read()
114 gold_assert(this->token_.is_writable());
115 if (this->is_descriptor_opened_)
117 release_descriptor(this->descriptor_, true);
118 this->descriptor_ = -1;
119 this->is_descriptor_opened_ = false;
121 this->name_.clear();
122 this->clear_views(CLEAR_VIEWS_ALL);
125 // Open the file.
127 bool
128 File_read::open(const Task* task, const std::string& name)
130 gold_assert(this->token_.is_writable()
131 && this->descriptor_ < 0
132 && !this->is_descriptor_opened_
133 && this->name_.empty());
134 this->name_ = name;
136 this->descriptor_ = open_descriptor(-1, this->name_.c_str(),
137 O_RDONLY);
139 if (this->descriptor_ >= 0)
141 this->is_descriptor_opened_ = true;
142 struct stat s;
143 if (::fstat(this->descriptor_, &s) < 0)
144 gold_error(_("%s: fstat failed: %s"),
145 this->name_.c_str(), strerror(errno));
146 this->size_ = s.st_size;
147 gold_debug(DEBUG_FILES, "Attempt to open %s succeeded",
148 this->name_.c_str());
149 this->token_.add_writer(task);
152 return this->descriptor_ >= 0;
155 // Open the file with the contents in memory.
157 bool
158 File_read::open(const Task* task, const std::string& name,
159 const unsigned char* contents, off_t size)
161 gold_assert(this->token_.is_writable()
162 && this->descriptor_ < 0
163 && !this->is_descriptor_opened_
164 && this->name_.empty());
165 this->name_ = name;
166 this->whole_file_view_ = new View(0, size, contents, 0, false,
167 View::DATA_NOT_OWNED);
168 this->add_view(this->whole_file_view_);
169 this->size_ = size;
170 this->token_.add_writer(task);
171 return true;
174 // Reopen a descriptor if necessary.
176 void
177 File_read::reopen_descriptor()
179 if (!this->is_descriptor_opened_)
181 this->descriptor_ = open_descriptor(this->descriptor_,
182 this->name_.c_str(),
183 O_RDONLY);
184 if (this->descriptor_ < 0)
185 gold_fatal(_("could not reopen file %s"), this->name_.c_str());
186 this->is_descriptor_opened_ = true;
190 // Release the file. This is called when we are done with the file in
191 // a Task.
193 void
194 File_read::release()
196 gold_assert(this->is_locked());
198 if (!parameters->options_valid() || parameters->options().stats())
200 file_counts_initialize_lock.initialize();
201 Hold_optional_lock hl(file_counts_lock);
202 File_read::total_mapped_bytes += this->mapped_bytes_;
203 File_read::current_mapped_bytes += this->mapped_bytes_;
204 if (File_read::current_mapped_bytes > File_read::maximum_mapped_bytes)
205 File_read::maximum_mapped_bytes = File_read::current_mapped_bytes;
208 this->mapped_bytes_ = 0;
210 // Only clear views if there is only one attached object. Otherwise
211 // we waste time trying to clear cached archive views. Similarly
212 // for releasing the descriptor.
213 if (this->object_count_ <= 1)
215 this->clear_views(CLEAR_VIEWS_NORMAL);
216 if (this->is_descriptor_opened_)
218 release_descriptor(this->descriptor_, false);
219 this->is_descriptor_opened_ = false;
223 this->released_ = true;
226 // Lock the file.
228 void
229 File_read::lock(const Task* task)
231 gold_assert(this->released_);
232 this->token_.add_writer(task);
233 this->released_ = false;
236 // Unlock the file.
238 void
239 File_read::unlock(const Task* task)
241 this->release();
242 this->token_.remove_writer(task);
245 // Return whether the file is locked.
247 bool
248 File_read::is_locked() const
250 if (!this->token_.is_writable())
251 return true;
252 // The file is not locked, so it should have been released.
253 gold_assert(this->released_);
254 return false;
257 // See if we have a view which covers the file starting at START for
258 // SIZE bytes. Return a pointer to the View if found, NULL if not.
259 // If BYTESHIFT is not -1U, the returned View must have the specified
260 // byte shift; otherwise, it may have any byte shift. If VSHIFTED is
261 // not NULL, this sets *VSHIFTED to a view which would have worked if
262 // not for the requested BYTESHIFT.
264 inline File_read::View*
265 File_read::find_view(off_t start, section_size_type size,
266 unsigned int byteshift, File_read::View** vshifted) const
268 if (vshifted != NULL)
269 *vshifted = NULL;
271 // If we have the whole file mmapped, and the alignment is right,
272 // we can return it.
273 if (this->whole_file_view_)
274 if (byteshift == -1U || byteshift == 0)
275 return this->whole_file_view_;
277 off_t page = File_read::page_offset(start);
279 unsigned int bszero = 0;
280 Views::const_iterator p = this->views_.upper_bound(std::make_pair(page - 1,
281 bszero));
283 while (p != this->views_.end() && p->first.first <= page)
285 if (p->second->start() <= start
286 && (p->second->start() + static_cast<off_t>(p->second->size())
287 >= start + static_cast<off_t>(size)))
289 if (byteshift == -1U || byteshift == p->second->byteshift())
291 p->second->set_accessed();
292 return p->second;
295 if (vshifted != NULL && *vshifted == NULL)
296 *vshifted = p->second;
299 ++p;
302 return NULL;
305 // Read SIZE bytes from the file starting at offset START. Read into
306 // the buffer at P.
308 void
309 File_read::do_read(off_t start, section_size_type size, void* p)
311 ssize_t bytes;
312 if (this->whole_file_view_ != NULL)
314 bytes = this->size_ - start;
315 if (static_cast<section_size_type>(bytes) >= size)
317 memcpy(p, this->whole_file_view_->data() + start, size);
318 return;
321 else
323 this->reopen_descriptor();
324 bytes = ::pread(this->descriptor_, p, size, start);
325 if (static_cast<section_size_type>(bytes) == size)
326 return;
328 if (bytes < 0)
330 gold_fatal(_("%s: pread failed: %s"),
331 this->filename().c_str(), strerror(errno));
332 return;
336 gold_fatal(_("%s: file too short: read only %lld of %lld bytes at %lld"),
337 this->filename().c_str(),
338 static_cast<long long>(bytes),
339 static_cast<long long>(size),
340 static_cast<long long>(start));
343 // Read data from the file.
345 void
346 File_read::read(off_t start, section_size_type size, void* p)
348 const File_read::View* pv = this->find_view(start, size, -1U, NULL);
349 if (pv != NULL)
351 memcpy(p, pv->data() + (start - pv->start() + pv->byteshift()), size);
352 return;
355 this->do_read(start, size, p);
358 // Add a new view. There may already be an existing view at this
359 // offset. If there is, the new view will be larger, and should
360 // replace the old view.
362 void
363 File_read::add_view(File_read::View* v)
365 std::pair<Views::iterator, bool> ins =
366 this->views_.insert(std::make_pair(std::make_pair(v->start(),
367 v->byteshift()),
368 v));
369 if (ins.second)
370 return;
372 // There was an existing view at this offset. It must not be large
373 // enough. We can't delete it here, since something might be using
374 // it; we put it on a list to be deleted when the file is unlocked.
375 File_read::View* vold = ins.first->second;
376 gold_assert(vold->size() < v->size());
377 if (vold->should_cache())
379 v->set_cache();
380 vold->clear_cache();
382 this->saved_views_.push_back(vold);
384 ins.first->second = v;
387 // Make a new view with a specified byteshift, reading the data from
388 // the file.
390 File_read::View*
391 File_read::make_view(off_t start, section_size_type size,
392 unsigned int byteshift, bool cache)
394 gold_assert(size > 0);
396 // Check that start and end of the view are within the file.
397 if (start > this->size_
398 || (static_cast<unsigned long long>(size)
399 > static_cast<unsigned long long>(this->size_ - start)))
400 gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
401 "size of file; the file may be corrupt"),
402 this->filename().c_str(),
403 static_cast<long long>(size),
404 static_cast<long long>(start));
406 off_t poff = File_read::page_offset(start);
408 section_size_type psize = File_read::pages(size + (start - poff));
410 if (poff + static_cast<off_t>(psize) >= this->size_)
412 psize = this->size_ - poff;
413 gold_assert(psize >= size);
416 File_read::View* v;
417 if (byteshift != 0)
419 unsigned char* p = new unsigned char[psize + byteshift];
420 memset(p, 0, byteshift);
421 this->do_read(poff, psize, p + byteshift);
422 v = new File_read::View(poff, psize, p, byteshift, cache,
423 View::DATA_ALLOCATED_ARRAY);
425 else
427 this->reopen_descriptor();
428 void* p = ::mmap(NULL, psize, PROT_READ, MAP_PRIVATE,
429 this->descriptor_, poff);
430 if (p == MAP_FAILED)
431 gold_fatal(_("%s: mmap offset %lld size %lld failed: %s"),
432 this->filename().c_str(),
433 static_cast<long long>(poff),
434 static_cast<long long>(psize),
435 strerror(errno));
437 this->mapped_bytes_ += psize;
439 const unsigned char* pbytes = static_cast<const unsigned char*>(p);
440 v = new File_read::View(poff, psize, pbytes, 0, cache,
441 View::DATA_MMAPPED);
444 this->add_view(v);
446 return v;
449 // Find a View or make a new one, shifted as required by the file
450 // offset OFFSET and ALIGNED.
452 File_read::View*
453 File_read::find_or_make_view(off_t offset, off_t start,
454 section_size_type size, bool aligned, bool cache)
456 unsigned int byteshift;
457 if (offset == 0)
458 byteshift = 0;
459 else
461 unsigned int target_size = (!parameters->target_valid()
462 ? 64
463 : parameters->target().get_size());
464 byteshift = offset & ((target_size / 8) - 1);
466 // Set BYTESHIFT to the number of dummy bytes which must be
467 // inserted before the data in order for this data to be
468 // aligned.
469 if (byteshift != 0)
470 byteshift = (target_size / 8) - byteshift;
473 // If --map-whole-files is set, make sure we have a
474 // whole file view. Options may not yet be ready, e.g.,
475 // when reading a version script. We then default to
476 // --no-map-whole-files.
477 if (this->whole_file_view_ == NULL
478 && parameters->options_valid()
479 && parameters->options().map_whole_files())
480 this->whole_file_view_ = this->make_view(0, this->size_, 0, cache);
482 // Try to find a View with the required BYTESHIFT.
483 File_read::View* vshifted;
484 File_read::View* v = this->find_view(offset + start, size,
485 aligned ? byteshift : -1U,
486 &vshifted);
487 if (v != NULL)
489 if (cache)
490 v->set_cache();
491 return v;
494 // If VSHIFTED is not NULL, then it has the data we need, but with
495 // the wrong byteshift.
496 v = vshifted;
497 if (v != NULL)
499 gold_assert(aligned);
501 unsigned char* pbytes = new unsigned char[v->size() + byteshift];
502 memset(pbytes, 0, byteshift);
503 memcpy(pbytes + byteshift, v->data() + v->byteshift(), v->size());
505 File_read::View* shifted_view =
506 new File_read::View(v->start(), v->size(), pbytes, byteshift,
507 cache, View::DATA_ALLOCATED_ARRAY);
509 this->add_view(shifted_view);
510 return shifted_view;
513 // Make a new view. If we don't need an aligned view, use a
514 // byteshift of 0, so that we can use mmap.
515 return this->make_view(offset + start, size,
516 aligned ? byteshift : 0,
517 cache);
520 // Get a view into the file.
522 const unsigned char*
523 File_read::get_view(off_t offset, off_t start, section_size_type size,
524 bool aligned, bool cache)
526 File_read::View* pv = this->find_or_make_view(offset, start, size,
527 aligned, cache);
528 return pv->data() + (offset + start - pv->start() + pv->byteshift());
531 File_view*
532 File_read::get_lasting_view(off_t offset, off_t start, section_size_type size,
533 bool aligned, bool cache)
535 File_read::View* pv = this->find_or_make_view(offset, start, size,
536 aligned, cache);
537 pv->lock();
538 return new File_view(*this, pv,
539 (pv->data()
540 + (offset + start - pv->start() + pv->byteshift())));
543 // Use readv to read COUNT entries from RM starting at START. BASE
544 // must be added to all file offsets in RM.
546 void
547 File_read::do_readv(off_t base, const Read_multiple& rm, size_t start,
548 size_t count)
550 unsigned char discard[File_read::page_size];
551 iovec iov[File_read::max_readv_entries * 2];
552 size_t iov_index = 0;
554 off_t first_offset = rm[start].file_offset;
555 off_t last_offset = first_offset;
556 ssize_t want = 0;
557 for (size_t i = 0; i < count; ++i)
559 const Read_multiple_entry& i_entry(rm[start + i]);
561 if (i_entry.file_offset > last_offset)
563 size_t skip = i_entry.file_offset - last_offset;
564 gold_assert(skip <= sizeof discard);
566 iov[iov_index].iov_base = discard;
567 iov[iov_index].iov_len = skip;
568 ++iov_index;
570 want += skip;
573 iov[iov_index].iov_base = i_entry.buffer;
574 iov[iov_index].iov_len = i_entry.size;
575 ++iov_index;
577 want += i_entry.size;
579 last_offset = i_entry.file_offset + i_entry.size;
582 this->reopen_descriptor();
584 gold_assert(iov_index < sizeof iov / sizeof iov[0]);
586 if (::lseek(this->descriptor_, base + first_offset, SEEK_SET) < 0)
587 gold_fatal(_("%s: lseek failed: %s"),
588 this->filename().c_str(), strerror(errno));
590 ssize_t got = ::readv(this->descriptor_, iov, iov_index);
592 if (got < 0)
593 gold_fatal(_("%s: readv failed: %s"),
594 this->filename().c_str(), strerror(errno));
595 if (got != want)
596 gold_fatal(_("%s: file too short: read only %zd of %zd bytes at %lld"),
597 this->filename().c_str(),
598 got, want, static_cast<long long>(base + first_offset));
601 // Read several pieces of data from the file.
603 void
604 File_read::read_multiple(off_t base, const Read_multiple& rm)
606 size_t count = rm.size();
607 size_t i = 0;
608 while (i < count)
610 // Find up to MAX_READV_ENTRIES consecutive entries which are
611 // less than one page apart.
612 const Read_multiple_entry& i_entry(rm[i]);
613 off_t i_off = i_entry.file_offset;
614 off_t end_off = i_off + i_entry.size;
615 size_t j;
616 for (j = i + 1; j < count; ++j)
618 if (j - i >= File_read::max_readv_entries)
619 break;
620 const Read_multiple_entry& j_entry(rm[j]);
621 off_t j_off = j_entry.file_offset;
622 gold_assert(j_off >= end_off);
623 off_t j_end_off = j_off + j_entry.size;
624 if (j_end_off - end_off >= File_read::page_size)
625 break;
626 end_off = j_end_off;
629 if (j == i + 1)
630 this->read(base + i_off, i_entry.size, i_entry.buffer);
631 else
633 File_read::View* view = this->find_view(base + i_off,
634 end_off - i_off,
635 -1U, NULL);
636 if (view == NULL)
637 this->do_readv(base, rm, i, j - i);
638 else
640 const unsigned char* v = (view->data()
641 + (base + i_off - view->start()
642 + view->byteshift()));
643 for (size_t k = i; k < j; ++k)
645 const Read_multiple_entry& k_entry(rm[k]);
646 gold_assert((convert_to_section_size_type(k_entry.file_offset
647 - i_off)
648 + k_entry.size)
649 <= convert_to_section_size_type(end_off
650 - i_off));
651 memcpy(k_entry.buffer,
652 v + (k_entry.file_offset - i_off),
653 k_entry.size);
658 i = j;
662 // Mark all views as no longer cached.
664 void
665 File_read::clear_view_cache_marks()
667 // Just ignore this if there are multiple objects associated with
668 // the file. Otherwise we will wind up uncaching and freeing some
669 // views for other objects.
670 if (this->object_count_ > 1)
671 return;
673 for (Views::iterator p = this->views_.begin();
674 p != this->views_.end();
675 ++p)
676 p->second->clear_cache();
677 for (Saved_views::iterator p = this->saved_views_.begin();
678 p != this->saved_views_.end();
679 ++p)
680 (*p)->clear_cache();
683 // Remove all the file views. For a file which has multiple
684 // associated objects (i.e., an archive), we keep accessed views
685 // around until next time, in the hopes that they will be useful for
686 // the next object.
688 void
689 File_read::clear_views(Clear_views_mode mode)
691 bool keep_files_mapped = (parameters->options_valid()
692 && parameters->options().keep_files_mapped());
693 Views::iterator p = this->views_.begin();
694 while (p != this->views_.end())
696 bool should_delete;
697 if (p->second->is_locked() || p->second->is_permanent_view())
698 should_delete = false;
699 else if (mode == CLEAR_VIEWS_ALL)
700 should_delete = true;
701 else if (p->second->should_cache() && keep_files_mapped)
702 should_delete = false;
703 else if (this->object_count_ > 1
704 && p->second->accessed()
705 && mode != CLEAR_VIEWS_ARCHIVE)
706 should_delete = false;
707 else
708 should_delete = true;
710 if (should_delete)
712 if (p->second == this->whole_file_view_)
713 this->whole_file_view_ = NULL;
714 delete p->second;
716 // map::erase invalidates only the iterator to the deleted
717 // element.
718 Views::iterator pe = p;
719 ++p;
720 this->views_.erase(pe);
722 else
724 p->second->clear_accessed();
725 ++p;
729 Saved_views::iterator q = this->saved_views_.begin();
730 while (q != this->saved_views_.end())
732 if (!(*q)->is_locked())
734 delete *q;
735 q = this->saved_views_.erase(q);
737 else
739 gold_assert(mode != CLEAR_VIEWS_ALL);
740 ++q;
745 // Print statistical information to stderr. This is used for --stats.
747 void
748 File_read::print_stats()
750 fprintf(stderr, _("%s: total bytes mapped for read: %llu\n"),
751 program_name, File_read::total_mapped_bytes);
752 fprintf(stderr, _("%s: maximum bytes mapped for read at one time: %llu\n"),
753 program_name, File_read::maximum_mapped_bytes);
756 // Class File_view.
758 File_view::~File_view()
760 gold_assert(this->file_.is_locked());
761 this->view_->unlock();
764 // Class Input_file.
766 // Create a file for testing.
768 Input_file::Input_file(const Task* task, const char* name,
769 const unsigned char* contents, off_t size)
770 : file_()
772 this->input_argument_ =
773 new Input_file_argument(name, Input_file_argument::INPUT_FILE_TYPE_FILE,
774 "", false, Position_dependent_options());
775 bool ok = this->file_.open(task, name, contents, size);
776 gold_assert(ok);
779 // Return the position dependent options in force for this file.
781 const Position_dependent_options&
782 Input_file::options() const
784 return this->input_argument_->options();
787 // Return the name given by the user. For -lc this will return "c".
789 const char*
790 Input_file::name() const
792 return this->input_argument_->name();
795 // Return whether this file is in a system directory.
797 bool
798 Input_file::is_in_system_directory() const
800 if (this->is_in_sysroot())
801 return true;
802 return parameters->options().is_in_system_directory(this->filename());
805 // Return whether we are only reading symbols.
807 bool
808 Input_file::just_symbols() const
810 return this->input_argument_->just_symbols();
813 // Return whether this is a file that we will search for in the list
814 // of directories.
816 bool
817 Input_file::will_search_for() const
819 return (!IS_ABSOLUTE_PATH(this->input_argument_->name())
820 && (this->input_argument_->is_lib()
821 || this->input_argument_->is_searched_file()
822 || this->input_argument_->extra_search_path() != NULL));
825 // Return the file last modification time. Calls gold_fatal if the stat
826 // system call failed.
828 Timespec
829 File_read::get_mtime()
831 struct stat file_stat;
832 this->reopen_descriptor();
834 if (fstat(this->descriptor_, &file_stat) < 0)
835 gold_fatal(_("%s: stat failed: %s"), this->name_.c_str(),
836 strerror(errno));
837 #ifdef HAVE_STAT_ST_MTIM
838 return Timespec(file_stat.st_mtim.tv_sec, file_stat.st_mtim.tv_nsec);
839 #else
840 return Timespec(file_stat.st_mtime, 0);
841 #endif
844 // Try to find a file in the extra search dirs. Returns true on success.
846 bool
847 Input_file::try_extra_search_path(int* pindex,
848 const Input_file_argument* input_argument,
849 std::string filename, std::string* found_name,
850 std::string* namep)
852 if (input_argument->extra_search_path() == NULL)
853 return false;
855 std::string name = input_argument->extra_search_path();
856 if (!IS_DIR_SEPARATOR(name[name.length() - 1]))
857 name += '/';
858 name += filename;
860 struct stat dummy_stat;
861 if (*pindex > 0 || ::stat(name.c_str(), &dummy_stat) < 0)
862 return false;
864 *found_name = filename;
865 *namep = name;
866 return true;
869 // Find the actual file.
870 // If the filename is not absolute, we assume it is in the current
871 // directory *except* when:
872 // A) input_argument_->is_lib() is true;
873 // B) input_argument_->is_searched_file() is true; or
874 // C) input_argument_->extra_search_path() is not empty.
875 // In each, we look in extra_search_path + library_path to find
876 // the file location, rather than the current directory.
878 bool
879 Input_file::find_file(const Dirsearch& dirpath, int* pindex,
880 const Input_file_argument* input_argument,
881 bool* is_in_sysroot,
882 std::string* found_name, std::string* namep)
884 std::string name;
886 // Case 1: name is an absolute file, just try to open it
887 // Case 2: name is relative but is_lib is false, is_searched_file is false,
888 // and extra_search_path is empty
889 if (IS_ABSOLUTE_PATH(input_argument->name())
890 || (!input_argument->is_lib()
891 && !input_argument->is_searched_file()
892 && input_argument->extra_search_path() == NULL))
894 name = input_argument->name();
895 *found_name = name;
896 *namep = name;
897 return true;
899 // Case 3: is_lib is true or is_searched_file is true
900 else if (input_argument->is_lib()
901 || input_argument->is_searched_file())
903 std::string n1, n2;
904 if (input_argument->is_lib())
906 n1 = "lib";
907 n1 += input_argument->name();
908 if (parameters->options().is_static()
909 || !input_argument->options().Bdynamic())
910 n1 += ".a";
911 else
913 n2 = n1 + ".a";
914 n1 += ".so";
917 else
918 n1 = input_argument->name();
920 if (Input_file::try_extra_search_path(pindex, input_argument, n1,
921 found_name, namep))
922 return true;
924 if (!n2.empty() && Input_file::try_extra_search_path(pindex,
925 input_argument, n2,
926 found_name, namep))
927 return true;
929 // It is not in the extra_search_path.
930 name = dirpath.find(n1, n2, is_in_sysroot, pindex);
931 if (name.empty())
933 gold_error(_("cannot find %s%s"),
934 input_argument->is_lib() ? "-l" : "",
935 input_argument->name());
936 return false;
938 if (n2.empty() || name[name.length() - 1] == 'o')
939 *found_name = n1;
940 else
941 *found_name = n2;
942 *namep = name;
943 return true;
945 // Case 4: extra_search_path is not empty
946 else
948 gold_assert(input_argument->extra_search_path() != NULL);
950 if (try_extra_search_path(pindex, input_argument, input_argument->name(),
951 found_name, namep))
952 return true;
954 // extra_search_path failed, so check the normal search-path.
955 int index = *pindex;
956 if (index > 0)
957 --index;
958 name = dirpath.find(input_argument->name(), "",
959 is_in_sysroot, &index);
960 if (name.empty())
962 gold_error(_("cannot find %s"),
963 input_argument->name());
964 return false;
966 *found_name = input_argument->name();
967 *namep = name;
968 *pindex = index + 1;
969 return true;
973 // Open the file.
975 bool
976 Input_file::open(const Dirsearch& dirpath, const Task* task, int* pindex)
978 std::string name;
979 if (!Input_file::find_file(dirpath, pindex, this->input_argument_,
980 &this->is_in_sysroot_, &this->found_name_, &name))
981 return false;
983 // Now that we've figured out where the file lives, try to open it.
985 General_options::Object_format format =
986 this->input_argument_->options().format_enum();
987 bool ok;
988 if (format == General_options::OBJECT_FORMAT_ELF)
990 ok = this->file_.open(task, name);
991 this->format_ = FORMAT_ELF;
993 else
995 gold_assert(format == General_options::OBJECT_FORMAT_BINARY);
996 ok = this->open_binary(task, name);
997 this->format_ = FORMAT_BINARY;
1000 if (!ok)
1002 gold_error(_("cannot open %s: %s"),
1003 name.c_str(), strerror(errno));
1004 this->format_ = FORMAT_NONE;
1005 return false;
1008 return true;
1011 // Open a file for --format binary.
1013 bool
1014 Input_file::open_binary(const Task* task, const std::string& name)
1016 // In order to open a binary file, we need machine code, size, and
1017 // endianness. We may not have a valid target at this point, in
1018 // which case we use the default target.
1019 parameters_force_valid_target();
1020 const Target& target(parameters->target());
1022 Binary_to_elf binary_to_elf(target.machine_code(),
1023 target.get_size(),
1024 target.is_big_endian(),
1025 name);
1026 if (!binary_to_elf.convert(task))
1027 return false;
1028 return this->file_.open(task, name, binary_to_elf.converted_data_leak(),
1029 binary_to_elf.converted_size());
1032 } // End namespace gold.