--- /dev/null
+// fileread.cc -- read files for gold
+
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Written by Ian Lance Taylor <iant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include "gold.h"
+
+#include <cstring>
+#include <cerrno>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/uio.h>
+#include <sys/stat.h>
+#include "filenames.h"
+
+#include "debug.h"
+#include "parameters.h"
+#include "options.h"
+#include "dirsearch.h"
+#include "target.h"
+#include "binary.h"
+#include "descriptors.h"
+#include "fileread.h"
+
+#ifndef HAVE_READV
+struct iovec { void* iov_base; size_t iov_len };
+ssize_t
+readv(int, const iovec*, int)
+{
+ gold_unreachable();
+}
+#endif
+
+namespace gold
+{
+
+// Class File_read::View.
+
+File_read::View::~View()
+{
+ gold_assert(!this->is_locked());
+ if (!this->mapped_)
+ delete[] this->data_;
+ else
+ {
+ if (::munmap(const_cast<unsigned char*>(this->data_), this->size_) != 0)
+ gold_warning(_("munmap failed: %s"), strerror(errno));
+
+ File_read::current_mapped_bytes -= this->size_;
+ }
+}
+
+void
+File_read::View::lock()
+{
+ ++this->lock_count_;
+}
+
+void
+File_read::View::unlock()
+{
+ gold_assert(this->lock_count_ > 0);
+ --this->lock_count_;
+}
+
+bool
+File_read::View::is_locked()
+{
+ return this->lock_count_ > 0;
+}
+
+// Class File_read.
+
+// The File_read static variables.
+unsigned long long File_read::total_mapped_bytes;
+unsigned long long File_read::current_mapped_bytes;
+unsigned long long File_read::maximum_mapped_bytes;
+
+File_read::~File_read()
+{
+ gold_assert(this->token_.is_writable());
+ if (this->is_descriptor_opened_)
+ {
+ release_descriptor(this->descriptor_, true);
+ this->descriptor_ = -1;
+ this->is_descriptor_opened_ = false;
+ }
+ this->name_.clear();
+ this->clear_views(true);
+}
+
+// Open the file.
+
+bool
+File_read::open(const Task* task, const std::string& name)
+{
+ gold_assert(this->token_.is_writable()
+ && this->descriptor_ < 0
+ && !this->is_descriptor_opened_
+ && this->name_.empty());
+ this->name_ = name;
+
+ this->descriptor_ = open_descriptor(-1, this->name_.c_str(),
+ O_RDONLY);
+
+ if (this->descriptor_ >= 0)
+ {
+ this->is_descriptor_opened_ = true;
+ struct stat s;
+ if (::fstat(this->descriptor_, &s) < 0)
+ gold_error(_("%s: fstat failed: %s"),
+ this->name_.c_str(), strerror(errno));
+ this->size_ = s.st_size;
+ gold_debug(DEBUG_FILES, "Attempt to open %s succeeded",
+ this->name_.c_str());
+
+ this->token_.add_writer(task);
+ }
+
+ return this->descriptor_ >= 0;
+}
+
+// Open the file with the contents in memory.
+
+bool
+File_read::open(const Task* task, const std::string& name,
+ const unsigned char* contents, off_t size)
+{
+ gold_assert(this->token_.is_writable()
+ && this->descriptor_ < 0
+ && !this->is_descriptor_opened_
+ && this->name_.empty());
+ this->name_ = name;
+ this->contents_ = contents;
+ this->size_ = size;
+ this->token_.add_writer(task);
+ return true;
+}
+
+// Reopen a descriptor if necessary.
+
+void
+File_read::reopen_descriptor()
+{
+ if (!this->is_descriptor_opened_)
+ {
+ this->descriptor_ = open_descriptor(this->descriptor_,
+ this->name_.c_str(),
+ O_RDONLY);
+ if (this->descriptor_ < 0)
+ gold_fatal(_("could not reopen file %s"), this->name_.c_str());
+ this->is_descriptor_opened_ = true;
+ }
+}
+
+// Release the file. This is called when we are done with the file in
+// a Task.
+
+void
+File_read::release()
+{
+ gold_assert(this->is_locked());
+
+ File_read::total_mapped_bytes += this->mapped_bytes_;
+ File_read::current_mapped_bytes += this->mapped_bytes_;
+ this->mapped_bytes_ = 0;
+ if (File_read::current_mapped_bytes > File_read::maximum_mapped_bytes)
+ File_read::maximum_mapped_bytes = File_read::current_mapped_bytes;
+
+ // Only clear views if there is only one attached object. Otherwise
+ // we waste time trying to clear cached archive views. Similarly
+ // for releasing the descriptor.
+ if (this->object_count_ <= 1)
+ {
+ this->clear_views(false);
+ if (this->is_descriptor_opened_)
+ {
+ release_descriptor(this->descriptor_, false);
+ this->is_descriptor_opened_ = false;
+ }
+ }
+
+ this->released_ = true;
+}
+
+// Lock the file.
+
+void
+File_read::lock(const Task* task)
+{
+ gold_assert(this->released_);
+ this->token_.add_writer(task);
+ this->released_ = false;
+}
+
+// Unlock the file.
+
+void
+File_read::unlock(const Task* task)
+{
+ this->release();
+ this->token_.remove_writer(task);
+}
+
+// Return whether the file is locked.
+
+bool
+File_read::is_locked() const
+{
+ if (!this->token_.is_writable())
+ return true;
+ // The file is not locked, so it should have been released.
+ gold_assert(this->released_);
+ return false;
+}
+
+// See if we have a view which covers the file starting at START for
+// SIZE bytes. Return a pointer to the View if found, NULL if not.
+// If BYTESHIFT is not -1U, the returned View must have the specified
+// byte shift; otherwise, it may have any byte shift. If VSHIFTED is
+// not NULL, this sets *VSHIFTED to a view which would have worked if
+// not for the requested BYTESHIFT.
+
+inline File_read::View*
+File_read::find_view(off_t start, section_size_type size,
+ unsigned int byteshift, File_read::View** vshifted) const
+{
+ if (vshifted != NULL)
+ *vshifted = NULL;
+
+ off_t page = File_read::page_offset(start);
+
+ unsigned int bszero = 0;
+ Views::const_iterator p = this->views_.upper_bound(std::make_pair(page - 1,
+ bszero));
+
+ while (p != this->views_.end() && p->first.first <= page)
+ {
+ if (p->second->start() <= start
+ && (p->second->start() + static_cast<off_t>(p->second->size())
+ >= start + static_cast<off_t>(size)))
+ {
+ if (byteshift == -1U || byteshift == p->second->byteshift())
+ {
+ p->second->set_accessed();
+ return p->second;
+ }
+
+ if (vshifted != NULL && *vshifted == NULL)
+ *vshifted = p->second;
+ }
+
+ ++p;
+ }
+
+ return NULL;
+}
+
+// Read SIZE bytes from the file starting at offset START. Read into
+// the buffer at P.
+
+void
+File_read::do_read(off_t start, section_size_type size, void* p)
+{
+ ssize_t bytes;
+ if (this->contents_ != NULL)
+ {
+ bytes = this->size_ - start;
+ if (static_cast<section_size_type>(bytes) >= size)
+ {
+ memcpy(p, this->contents_ + start, size);
+ return;
+ }
+ }
+ else
+ {
+ this->reopen_descriptor();
+ bytes = ::pread(this->descriptor_, p, size, start);
+ if (static_cast<section_size_type>(bytes) == size)
+ return;
+
+ if (bytes < 0)
+ {
+ gold_fatal(_("%s: pread failed: %s"),
+ this->filename().c_str(), strerror(errno));
+ return;
+ }
+ }
+
+ gold_fatal(_("%s: file too short: read only %lld of %lld bytes at %lld"),
+ this->filename().c_str(),
+ static_cast<long long>(bytes),
+ static_cast<long long>(size),
+ static_cast<long long>(start));
+}
+
+// Read data from the file.
+
+void
+File_read::read(off_t start, section_size_type size, void* p)
+{
+ const File_read::View* pv = this->find_view(start, size, -1U, NULL);
+ if (pv != NULL)
+ {
+ memcpy(p, pv->data() + (start - pv->start() + pv->byteshift()), size);
+ return;
+ }
+
+ this->do_read(start, size, p);
+}
+
+// Add a new view. There may already be an existing view at this
+// offset. If there is, the new view will be larger, and should
+// replace the old view.
+
+void
+File_read::add_view(File_read::View* v)
+{
+ std::pair<Views::iterator, bool> ins =
+ this->views_.insert(std::make_pair(std::make_pair(v->start(),
+ v->byteshift()),
+ v));
+ if (ins.second)
+ return;
+
+ // There was an existing view at this offset. It must not be large
+ // enough. We can't delete it here, since something might be using
+ // it; we put it on a list to be deleted when the file is unlocked.
+ File_read::View* vold = ins.first->second;
+ gold_assert(vold->size() < v->size());
+ if (vold->should_cache())
+ {
+ v->set_cache();
+ vold->clear_cache();
+ }
+ this->saved_views_.push_back(vold);
+
+ ins.first->second = v;
+}
+
+// Make a new view with a specified byteshift, reading the data from
+// the file.
+
+File_read::View*
+File_read::make_view(off_t start, section_size_type size,
+ unsigned int byteshift, bool cache)
+{
+ gold_assert(size > 0);
+
+ // Check that start and end of the view are within the file.
+ if (start > this->size_
+ || (static_cast<unsigned long long>(size)
+ > static_cast<unsigned long long>(this->size_ - start)))
+ gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
+ "size of file; the file may be corrupt"),
+ this->filename().c_str(),
+ static_cast<long long>(size),
+ static_cast<long long>(start));
+
+ off_t poff = File_read::page_offset(start);
+
+ section_size_type psize = File_read::pages(size + (start - poff));
+
+ if (poff + static_cast<off_t>(psize) >= this->size_)
+ {
+ psize = this->size_ - poff;
+ gold_assert(psize >= size);
+ }
+
+ File_read::View* v;
+ if (this->contents_ != NULL || byteshift != 0)
+ {
+ unsigned char* p = new unsigned char[psize + byteshift];
+ memset(p, 0, byteshift);
+ this->do_read(poff, psize, p + byteshift);
+ v = new File_read::View(poff, psize, p, byteshift, cache, false);
+ }
+ else
+ {
+ this->reopen_descriptor();
+ void* p = ::mmap(NULL, psize, PROT_READ, MAP_PRIVATE,
+ this->descriptor_, poff);
+ if (p == MAP_FAILED)
+ gold_fatal(_("%s: mmap offset %lld size %lld failed: %s"),
+ this->filename().c_str(),
+ static_cast<long long>(poff),
+ static_cast<long long>(psize),
+ strerror(errno));
+
+ this->mapped_bytes_ += psize;
+
+ const unsigned char* pbytes = static_cast<const unsigned char*>(p);
+ v = new File_read::View(poff, psize, pbytes, 0, cache, true);
+ }
+
+ this->add_view(v);
+
+ return v;
+}
+
+// Find a View or make a new one, shifted as required by the file
+// offset OFFSET and ALIGNED.
+
+File_read::View*
+File_read::find_or_make_view(off_t offset, off_t start,
+ section_size_type size, bool aligned, bool cache)
+{
+ unsigned int byteshift;
+ if (offset == 0)
+ byteshift = 0;
+ else
+ {
+ unsigned int target_size = (!parameters->target_valid()
+ ? 64
+ : parameters->target().get_size());
+ byteshift = offset & ((target_size / 8) - 1);
+
+ // Set BYTESHIFT to the number of dummy bytes which must be
+ // inserted before the data in order for this data to be
+ // aligned.
+ if (byteshift != 0)
+ byteshift = (target_size / 8) - byteshift;
+ }
+
+ // Try to find a View with the required BYTESHIFT.
+ File_read::View* vshifted;
+ File_read::View* v = this->find_view(offset + start, size,
+ aligned ? byteshift : -1U,
+ &vshifted);
+ if (v != NULL)
+ {
+ if (cache)
+ v->set_cache();
+ return v;
+ }
+
+ // If VSHIFTED is not NULL, then it has the data we need, but with
+ // the wrong byteshift.
+ v = vshifted;
+ if (v != NULL)
+ {
+ gold_assert(aligned);
+
+ unsigned char* pbytes = new unsigned char[v->size() + byteshift];
+ memset(pbytes, 0, byteshift);
+ memcpy(pbytes + byteshift, v->data() + v->byteshift(), v->size());
+
+ File_read::View* shifted_view = new File_read::View(v->start(), v->size(),
+ pbytes, byteshift,
+ cache, false);
+
+ this->add_view(shifted_view);
+ return shifted_view;
+ }
+
+ // Make a new view. If we don't need an aligned view, use a
+ // byteshift of 0, so that we can use mmap.
+ return this->make_view(offset + start, size,
+ aligned ? byteshift : 0,
+ cache);
+}
+
+// Get a view into the file.
+
+const unsigned char*
+File_read::get_view(off_t offset, off_t start, section_size_type size,
+ bool aligned, bool cache)
+{
+ File_read::View* pv = this->find_or_make_view(offset, start, size,
+ aligned, cache);
+ return pv->data() + (offset + start - pv->start() + pv->byteshift());
+}
+
+File_view*
+File_read::get_lasting_view(off_t offset, off_t start, section_size_type size,
+ bool aligned, bool cache)
+{
+ File_read::View* pv = this->find_or_make_view(offset, start, size,
+ aligned, cache);
+ pv->lock();
+ return new File_view(*this, pv,
+ (pv->data()
+ + (offset + start - pv->start() + pv->byteshift())));
+}
+
+// Use readv to read COUNT entries from RM starting at START. BASE
+// must be added to all file offsets in RM.
+
+void
+File_read::do_readv(off_t base, const Read_multiple& rm, size_t start,
+ size_t count)
+{
+ unsigned char discard[File_read::page_size];
+ iovec iov[File_read::max_readv_entries * 2];
+ size_t iov_index = 0;
+
+ off_t first_offset = rm[start].file_offset;
+ off_t last_offset = first_offset;
+ ssize_t want = 0;
+ for (size_t i = 0; i < count; ++i)
+ {
+ const Read_multiple_entry& i_entry(rm[start + i]);
+
+ if (i_entry.file_offset > last_offset)
+ {
+ size_t skip = i_entry.file_offset - last_offset;
+ gold_assert(skip <= sizeof discard);
+
+ iov[iov_index].iov_base = discard;
+ iov[iov_index].iov_len = skip;
+ ++iov_index;
+
+ want += skip;
+ }
+
+ iov[iov_index].iov_base = i_entry.buffer;
+ iov[iov_index].iov_len = i_entry.size;
+ ++iov_index;
+
+ want += i_entry.size;
+
+ last_offset = i_entry.file_offset + i_entry.size;
+ }
+
+ this->reopen_descriptor();
+
+ gold_assert(iov_index < sizeof iov / sizeof iov[0]);
+
+ if (::lseek(this->descriptor_, base + first_offset, SEEK_SET) < 0)
+ gold_fatal(_("%s: lseek failed: %s"),
+ this->filename().c_str(), strerror(errno));
+
+ ssize_t got = ::readv(this->descriptor_, iov, iov_index);
+
+ if (got < 0)
+ gold_fatal(_("%s: readv failed: %s"),
+ this->filename().c_str(), strerror(errno));
+ if (got != want)
+ gold_fatal(_("%s: file too short: read only %zd of %zd bytes at %lld"),
+ this->filename().c_str(),
+ got, want, static_cast<long long>(base + first_offset));
+}
+
+// Read several pieces of data from the file.
+
+void
+File_read::read_multiple(off_t base, const Read_multiple& rm)
+{
+ size_t count = rm.size();
+ size_t i = 0;
+ while (i < count)
+ {
+ // Find up to MAX_READV_ENTRIES consecutive entries which are
+ // less than one page apart.
+ const Read_multiple_entry& i_entry(rm[i]);
+ off_t i_off = i_entry.file_offset;
+ off_t end_off = i_off + i_entry.size;
+ size_t j;
+ for (j = i + 1; j < count; ++j)
+ {
+ if (j - i >= File_read::max_readv_entries)
+ break;
+ const Read_multiple_entry& j_entry(rm[j]);
+ off_t j_off = j_entry.file_offset;
+ gold_assert(j_off >= end_off);
+ off_t j_end_off = j_off + j_entry.size;
+ if (j_end_off - end_off >= File_read::page_size)
+ break;
+ end_off = j_end_off;
+ }
+
+ if (j == i + 1)
+ this->read(base + i_off, i_entry.size, i_entry.buffer);
+ else
+ {
+ File_read::View* view = this->find_view(base + i_off,
+ end_off - i_off,
+ -1U, NULL);
+ if (view == NULL)
+ this->do_readv(base, rm, i, j - i);
+ else
+ {
+ const unsigned char* v = (view->data()
+ + (base + i_off - view->start()
+ + view->byteshift()));
+ for (size_t k = i; k < j; ++k)
+ {
+ const Read_multiple_entry& k_entry(rm[k]);
+ gold_assert((convert_to_section_size_type(k_entry.file_offset
+ - i_off)
+ + k_entry.size)
+ <= convert_to_section_size_type(end_off
+ - i_off));
+ memcpy(k_entry.buffer,
+ v + (k_entry.file_offset - i_off),
+ k_entry.size);
+ }
+ }
+ }
+
+ i = j;
+ }
+}
+
+// Mark all views as no longer cached.
+
+void
+File_read::clear_view_cache_marks()
+{
+ // Just ignore this if there are multiple objects associated with
+ // the file. Otherwise we will wind up uncaching and freeing some
+ // views for other objects.
+ if (this->object_count_ > 1)
+ return;
+
+ for (Views::iterator p = this->views_.begin();
+ p != this->views_.end();
+ ++p)
+ p->second->clear_cache();
+ for (Saved_views::iterator p = this->saved_views_.begin();
+ p != this->saved_views_.end();
+ ++p)
+ (*p)->clear_cache();
+}
+
+// Remove all the file views. For a file which has multiple
+// associated objects (i.e., an archive), we keep accessed views
+// around until next time, in the hopes that they will be useful for
+// the next object.
+
+void
+File_read::clear_views(bool destroying)
+{
+ Views::iterator p = this->views_.begin();
+ while (p != this->views_.end())
+ {
+ bool should_delete;
+ if (p->second->is_locked())
+ should_delete = false;
+ else if (destroying)
+ should_delete = true;
+ else if (p->second->should_cache())
+ should_delete = false;
+ else if (this->object_count_ > 1 && p->second->accessed())
+ should_delete = false;
+ else
+ should_delete = true;
+
+ if (should_delete)
+ {
+ delete p->second;
+
+ // map::erase invalidates only the iterator to the deleted
+ // element.
+ Views::iterator pe = p;
+ ++p;
+ this->views_.erase(pe);
+ }
+ else
+ {
+ gold_assert(!destroying);
+ p->second->clear_accessed();
+ ++p;
+ }
+ }
+
+ Saved_views::iterator q = this->saved_views_.begin();
+ while (q != this->saved_views_.end())
+ {
+ if (!(*q)->is_locked())
+ {
+ delete *q;
+ q = this->saved_views_.erase(q);
+ }
+ else
+ {
+ gold_assert(!destroying);
+ ++q;
+ }
+ }
+}
+
+// Print statistical information to stderr. This is used for --stats.
+
+void
+File_read::print_stats()
+{
+ fprintf(stderr, _("%s: total bytes mapped for read: %llu\n"),
+ program_name, File_read::total_mapped_bytes);
+ fprintf(stderr, _("%s: maximum bytes mapped for read at one time: %llu\n"),
+ program_name, File_read::maximum_mapped_bytes);
+}
+
+// Class File_view.
+
+File_view::~File_view()
+{
+ gold_assert(this->file_.is_locked());
+ this->view_->unlock();
+}
+
+// Class Input_file.
+
+// Create a file for testing.
+
+Input_file::Input_file(const Task* task, const char* name,
+ const unsigned char* contents, off_t size)
+ : file_()
+{
+ this->input_argument_ =
+ new Input_file_argument(name, Input_file_argument::INPUT_FILE_TYPE_FILE,
+ "", false, Position_dependent_options());
+ bool ok = this->file_.open(task, name, contents, size);
+ gold_assert(ok);
+}
+
+// Return the position dependent options in force for this file.
+
+const Position_dependent_options&
+Input_file::options() const
+{
+ return this->input_argument_->options();
+}
+
+// Return the name given by the user. For -lc this will return "c".
+
+const char*
+Input_file::name() const
+{
+ return this->input_argument_->name();
+}
+
+// Return whether this file is in a system directory.
+
+bool
+Input_file::is_in_system_directory() const
+{
+ if (this->is_in_sysroot())
+ return true;
+ return parameters->options().is_in_system_directory(this->filename());
+}
+
+// Return whether we are only reading symbols.
+
+bool
+Input_file::just_symbols() const
+{
+ return this->input_argument_->just_symbols();
+}
+
+// Return whether this is a file that we will search for in the list
+// of directories.
+
+bool
+Input_file::will_search_for() const
+{
+ return (!IS_ABSOLUTE_PATH(this->input_argument_->name())
+ && (this->input_argument_->is_lib()
+ || this->input_argument_->is_searched_file()
+ || this->input_argument_->extra_search_path() != NULL));
+}
+
+// Return the file last modification time. Calls gold_fatal if the stat
+// system call failed.
+
+Timespec
+File_read::get_mtime()
+{
+ struct stat file_stat;
+ this->reopen_descriptor();
+
+ if (fstat(this->descriptor_, &file_stat) < 0)
+ gold_fatal(_("%s: stat failed: %s"), this->name_.c_str(),
+ strerror(errno));
+ // TODO: do a configure check if st_mtim is present and get the
+ // nanoseconds part if it is.
+ return Timespec(file_stat.st_mtime, 0);
+}
+
+// Open the file.
+
+// If the filename is not absolute, we assume it is in the current
+// directory *except* when:
+// A) input_argument_->is_lib() is true;
+// B) input_argument_->is_searched_file() is true; or
+// C) input_argument_->extra_search_path() is not empty.
+// In each, we look in extra_search_path + library_path to find
+// the file location, rather than the current directory.
+
+bool
+Input_file::open(const Dirsearch& dirpath, const Task* task, int *pindex)
+{
+ std::string name;
+
+ // Case 1: name is an absolute file, just try to open it
+ // Case 2: name is relative but is_lib is false, is_searched_file is false,
+ // and extra_search_path is empty
+ if (IS_ABSOLUTE_PATH(this->input_argument_->name())
+ || (!this->input_argument_->is_lib()
+ && !this->input_argument_->is_searched_file()
+ && this->input_argument_->extra_search_path() == NULL))
+ {
+ name = this->input_argument_->name();
+ this->found_name_ = name;
+ }
+ // Case 3: is_lib is true or is_searched_file is true
+ else if (this->input_argument_->is_lib()
+ || this->input_argument_->is_searched_file())
+ {
+ // We don't yet support extra_search_path with -l.
+ gold_assert(this->input_argument_->extra_search_path() == NULL);
+ std::string n1, n2;
+ if (this->input_argument_->is_lib())
+ {
+ n1 = "lib";
+ n1 += this->input_argument_->name();
+ if (parameters->options().is_static()
+ || !this->input_argument_->options().Bdynamic())
+ n1 += ".a";
+ else
+ {
+ n2 = n1 + ".a";
+ n1 += ".so";
+ }
+ }
+ else
+ n1 = this->input_argument_->name();
+ name = dirpath.find(n1, n2, &this->is_in_sysroot_, pindex);
+ if (name.empty())
+ {
+ gold_error(_("cannot find %s%s"),
+ this->input_argument_->is_lib() ? "-l" : "",
+ this->input_argument_->name());
+ return false;
+ }
+ if (n2.empty() || name[name.length() - 1] == 'o')
+ this->found_name_ = n1;
+ else
+ this->found_name_ = n2;
+ }
+ // Case 4: extra_search_path is not empty
+ else
+ {
+ gold_assert(this->input_argument_->extra_search_path() != NULL);
+
+ // First, check extra_search_path.
+ name = this->input_argument_->extra_search_path();
+ if (!IS_DIR_SEPARATOR (name[name.length() - 1]))
+ name += '/';
+ name += this->input_argument_->name();
+ struct stat dummy_stat;
+ if (*pindex > 0 || ::stat(name.c_str(), &dummy_stat) < 0)
+ {
+ // extra_search_path failed, so check the normal search-path.
+ int index = *pindex;
+ if (index > 0)
+ --index;
+ name = dirpath.find(this->input_argument_->name(), "",
+ &this->is_in_sysroot_, &index);
+ if (name.empty())
+ {
+ gold_error(_("cannot find %s"),
+ this->input_argument_->name());
+ return false;
+ }
+ *pindex = index + 1;
+ }
+ this->found_name_ = this->input_argument_->name();
+ }
+
+ // Now that we've figured out where the file lives, try to open it.
+
+ General_options::Object_format format =
+ this->input_argument_->options().format_enum();
+ bool ok;
+ if (format == General_options::OBJECT_FORMAT_ELF)
+ ok = this->file_.open(task, name);
+ else
+ {
+ gold_assert(format == General_options::OBJECT_FORMAT_BINARY);
+ ok = this->open_binary(task, name);
+ }
+
+ if (!ok)
+ {
+ gold_error(_("cannot open %s: %s"),
+ name.c_str(), strerror(errno));
+ return false;
+ }
+
+ return true;
+}
+
+// Open a file for --format binary.
+
+bool
+Input_file::open_binary(const Task* task, const std::string& name)
+{
+ // In order to open a binary file, we need machine code, size, and
+ // endianness. We may not have a valid target at this point, in
+ // which case we use the default target.
+ parameters_force_valid_target();
+ const Target& target(parameters->target());
+
+ Binary_to_elf binary_to_elf(target.machine_code(),
+ target.get_size(),
+ target.is_big_endian(),
+ name);
+ if (!binary_to_elf.convert(task))
+ return false;
+ return this->file_.open(task, name, binary_to_elf.converted_data_leak(),
+ binary_to_elf.converted_size());
+}
+
+} // End namespace gold.
projects / msp430-binutils.git / blobdiff