// common.cc -- handle common symbols for gold
+// Copyright 2006, 2007, 2008 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 <algorithm>
#include "workqueue.h"
+#include "mapfile.h"
#include "layout.h"
#include "output.h"
#include "symtab.h"
// This task allocates the common symbols. We need a lock on the
// symbol table.
-Task::Is_runnable_type
-Allocate_commons_task::is_runnable(Workqueue*)
+Task_token*
+Allocate_commons_task::is_runnable()
{
if (!this->symtab_lock_->is_writable())
- return IS_LOCKED;
- return IS_RUNNABLE;
+ return this->symtab_lock_;
+ return NULL;
}
// Return the locks we hold: one on the symbol table, and one blocker.
-class Allocate_commons_task::Allocate_commons_locker : public Task_locker
-{
- public:
- Allocate_commons_locker(Task_token& symtab_lock, Task* task,
- Task_token& blocker, Workqueue* workqueue)
- : symtab_locker_(symtab_lock, task),
- blocker_(blocker, workqueue)
- { }
-
- private:
- Task_locker_write symtab_locker_;
- Task_locker_block blocker_;
-};
-
-Task_locker*
-Allocate_commons_task::locks(Workqueue* workqueue)
+void
+Allocate_commons_task::locks(Task_locker* tl)
{
- return new Allocate_commons_locker(*this->symtab_lock_, this,
- *this->blocker_, workqueue);
+ tl->add(this, this->blocker_);
+ tl->add(this, this->symtab_lock_);
}
// Allocate the common symbols.
void
Allocate_commons_task::run(Workqueue*)
{
- this->symtab_->allocate_commons(this->options_, this->layout_);
+ this->symtab_->allocate_commons(this->layout_, this->mapfile_);
}
// This class is used to sort the common symbol by size. We put the
return true;
const Symbol_table* symtab = this->symtab_;
- const Sized_symbol<size>* psa;
- psa = symtab->get_sized_symbol SELECT_SIZE_NAME(size) (pa
- SELECT_SIZE(size));
- const Sized_symbol<size>* psb;
- psb = symtab->get_sized_symbol SELECT_SIZE_NAME(size) (pb
- SELECT_SIZE(size));
+ const Sized_symbol<size>* psa = symtab->get_sized_symbol<size>(pa);
+ const Sized_symbol<size>* psb = symtab->get_sized_symbol<size>(pb);
+ // Sort by largest size first.
typename Sized_symbol<size>::Size_type sa = psa->symsize();
typename Sized_symbol<size>::Size_type sb = psb->symsize();
if (sa < sb)
return false;
- else if (sb > sa)
+ else if (sb < sa)
return true;
- // When the symbols are the same size, we sort them by alignment.
+ // When the symbols are the same size, we sort them by alignment,
+ // largest alignment first.
typename Sized_symbol<size>::Value_type va = psa->value();
typename Sized_symbol<size>::Value_type vb = psb->value();
if (va < vb)
return false;
- else if (vb > va)
+ else if (vb < va)
return true;
// Otherwise we stabilize the sort by sorting by name.
// Allocate the common symbols.
void
-Symbol_table::allocate_commons(const General_options& options, Layout* layout)
+Symbol_table::allocate_commons(Layout* layout, Mapfile* mapfile)
{
- if (this->get_size() == 32)
- this->do_allocate_commons<32>(options, layout);
- else if (this->get_size() == 64)
- this->do_allocate_commons<64>(options, layout);
+ if (parameters->target().get_size() == 32)
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_32_BIG)
+ this->do_allocate_commons<32>(layout, mapfile);
+#else
+ gold_unreachable();
+#endif
+ }
+ else if (parameters->target().get_size() == 64)
+ {
+#if defined(HAVE_TARGET_64_LITTLE) || defined(HAVE_TARGET_64_BIG)
+ this->do_allocate_commons<64>(layout, mapfile);
+#else
+ gold_unreachable();
+#endif
+ }
else
- abort();
+ gold_unreachable();
}
// Allocated the common symbols, sized version.
template<int size>
void
-Symbol_table::do_allocate_commons(const General_options&,
- Layout* layout)
+Symbol_table::do_allocate_commons(Layout* layout, Mapfile* mapfile)
+{
+ this->do_allocate_commons_list<size>(layout, false, &this->commons_,
+ mapfile);
+ this->do_allocate_commons_list<size>(layout, true, &this->tls_commons_,
+ mapfile);
+}
+
+// Allocate the common symbols in a list. IS_TLS indicates whether
+// these are TLS common symbols.
+
+template<int size>
+void
+Symbol_table::do_allocate_commons_list(Layout* layout, bool is_tls,
+ Commons_type* commons,
+ Mapfile* mapfile)
{
typedef typename Sized_symbol<size>::Value_type Value_type;
typedef typename Sized_symbol<size>::Size_type Size_type;
// forwarder. First remove all non-common symbols.
bool any = false;
uint64_t addralign = 0;
- for (Commons_type::iterator p = this->commons_.begin();
- p != this->commons_.end();
+ for (Commons_type::iterator p = commons->begin();
+ p != commons->end();
++p)
{
Symbol* sym = *p;
else
{
any = true;
- Sized_symbol<size>* ssym;
- ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (
- sym
- SELECT_SIZE(size));
+ Sized_symbol<size>* ssym = this->get_sized_symbol<size>(sym);
if (ssym->value() > addralign)
addralign = ssym->value();
}
// Sort the common symbols by size, so that they pack better into
// memory.
- std::sort(this->commons_.begin(), this->commons_.end(),
+ std::sort(commons->begin(), commons->end(),
Sort_commons<size>(this));
- // Place them in a newly allocated .bss section.
+ // Place them in a newly allocated BSS section.
- Output_data_common *poc = new Output_data_common(addralign);
+ Output_data_space *poc = new Output_data_space(addralign,
+ (is_tls
+ ? "** tls common"
+ : "** common"));
- layout->add_output_section_data(".bss", elfcpp::SHT_NOBITS,
- elfcpp::SHF_WRITE | elfcpp::SHF_ALLOC,
- poc);
+ const char* name = ".bss";
+ elfcpp::Elf_Xword flags = elfcpp::SHF_WRITE | elfcpp::SHF_ALLOC;
+ if (is_tls)
+ {
+ name = ".tbss";
+ flags |= elfcpp::SHF_TLS;
+ }
+ layout->add_output_section_data(name, elfcpp::SHT_NOBITS, flags, poc);
// Allocate them all.
off_t off = 0;
- for (Commons_type::iterator p = this->commons_.begin();
- p != this->commons_.end();
+ for (Commons_type::iterator p = commons->begin();
+ p != commons->end();
++p)
{
Symbol* sym = *p;
if (sym == NULL)
break;
+ Sized_symbol<size>* ssym = this->get_sized_symbol<size>(sym);
- Sized_symbol<size>* ssym;
- ssym = this->get_sized_symbol SELECT_SIZE_NAME(size) (sym
- SELECT_SIZE(size));
+ // Record the symbol in the map file now, before we change its
+ // value. Pass the size in separately so that we don't have to
+ // templatize the map code, which is not performance sensitive.
+ if (mapfile != NULL)
+ mapfile->report_allocate_common(sym, ssym->symsize());
off = align_address(off, ssym->value());
-
- Size_type symsize = ssym->symsize();
- ssym->init(ssym->name(), poc, off, symsize, ssym->type(),
- ssym->binding(), ssym->visibility(), ssym->nonvis(),
- false);
-
- off += symsize;
+ ssym->allocate_common(poc, off);
+ off += ssym->symsize();
}
- poc->set_common_size(off);
+ poc->set_current_data_size(off);
- this->commons_.clear();
+ commons->clear();
}
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff