// reloc.cc -- relocate input files for gold.
+// Copyright 2006, 2007 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 "workqueue.h"
this->symtab_lock_, this->blocker_));
}
+// Return a debugging name for the task.
+
+std::string
+Read_relocs::get_name() const
+{
+ return "Read_relocs " + this->object_->name();
+}
+
// Scan_relocs methods.
// These tasks scan the relocations read by Read_relocs and mark up
this->rd_ = NULL;
}
+// Return a debugging name for the task.
+
+std::string
+Scan_relocs::get_name() const
+{
+ return "Scan_relocs " + this->object_->name();
+}
+
// Relocate_task methods.
-// These tasks are always runnable.
+// We may have to wait for the output sections to be written.
Task::Is_runnable_type
Relocate_task::is_runnable(Workqueue*)
{
+ if (this->object_->relocs_must_follow_section_writes()
+ && this->output_sections_blocker_->is_blocked())
+ return IS_BLOCKED;
+
+ if (this->object_->is_locked())
+ return IS_LOCKED;
+
return IS_RUNNABLE;
}
// We want to lock the file while we run. We want to unblock
-// FINAL_BLOCKER when we are done.
+// INPUT_SECTIONS_BLOCKER and FINAL_BLOCKER when we are done.
class Relocate_task::Relocate_locker : public Task_locker
{
public:
- Relocate_locker(Task_token& token, Workqueue* workqueue,
+ Relocate_locker(Task_token& input_sections_blocker,
+ Task_token& final_blocker, Workqueue* workqueue,
Object* object)
- : blocker_(token, workqueue), objlock_(*object)
+ : input_sections_blocker_(input_sections_blocker, workqueue),
+ final_blocker_(final_blocker, workqueue),
+ objlock_(*object)
{ }
private:
- Task_locker_block blocker_;
+ Task_block_token input_sections_blocker_;
+ Task_block_token final_blocker_;
Task_locker_obj<Object> objlock_;
};
Task_locker*
Relocate_task::locks(Workqueue* workqueue)
{
- return new Relocate_locker(*this->final_blocker_, workqueue,
+ return new Relocate_locker(*this->input_sections_blocker_,
+ *this->final_blocker_,
+ workqueue,
this->object_);
}
this->of_);
}
+// Return a debugging name for the task.
+
+std::string
+Relocate_task::get_name() const
+{
+ return "Relocate_task " + this->object_->name();
+}
+
// Read the relocs and local symbols from the object file and store
// the information in RD.
rd->relocs.reserve(shnum / 2);
+ std::vector<Map_to_output>& map_sections(this->map_to_output());
+
const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(),
- shnum * This::shdr_size);
+ shnum * This::shdr_size,
+ true);
// Skip the first, dummy, section.
const unsigned char *ps = pshdrs + This::shdr_size;
for (unsigned int i = 1; i < shnum; ++i, ps += This::shdr_size)
unsigned int shndx = shdr.get_sh_info();
if (shndx >= shnum)
{
- fprintf(stderr, _("%s: %s: relocation section %u has bad info %u\n"),
- program_name, this->name().c_str(), i, shndx);
- gold_exit(false);
+ this->error(_("relocation section %u has bad info %u"),
+ i, shndx);
+ continue;
}
- if (!this->is_section_included(shndx))
+ Output_section* os = map_sections[shndx].output_section;
+ if (os == NULL)
continue;
// We are scanning relocations in order to fill out the GOT and
if (shdr.get_sh_link() != this->symtab_shndx_)
{
- fprintf(stderr,
- _("%s: %s: relocation section %u uses unexpected "
- "symbol table %u\n"),
- program_name, this->name().c_str(), i, shdr.get_sh_link());
- gold_exit(false);
+ this->error(_("relocation section %u uses unexpected "
+ "symbol table %u"),
+ i, shdr.get_sh_link());
+ continue;
}
off_t sh_size = shdr.get_sh_size();
reloc_size = elfcpp::Elf_sizes<size>::rela_size;
if (reloc_size != shdr.get_sh_entsize())
{
- fprintf(stderr,
- _("%s: %s: unexpected entsize for reloc section %u: "
- "%lu != %u"),
- program_name, this->name().c_str(), i,
- static_cast<unsigned long>(shdr.get_sh_entsize()),
- reloc_size);
- gold_exit(false);
+ this->error(_("unexpected entsize for reloc section %u: %lu != %u"),
+ i, static_cast<unsigned long>(shdr.get_sh_entsize()),
+ reloc_size);
+ continue;
}
size_t reloc_count = sh_size / reloc_size;
- if (reloc_count * reloc_size != sh_size)
+ if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
{
- fprintf(stderr, _("%s: %s: reloc section %u size %lu uneven"),
- program_name, this->name().c_str(), i,
- static_cast<unsigned long>(sh_size));
- gold_exit(false);
+ this->error(_("reloc section %u size %lu uneven"),
+ i, static_cast<unsigned long>(sh_size));
+ continue;
}
rd->relocs.push_back(Section_relocs());
Section_relocs& sr(rd->relocs.back());
sr.reloc_shndx = i;
sr.data_shndx = shndx;
- sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size);
+ sr.contents = this->get_lasting_view(shdr.get_sh_offset(), sh_size,
+ true);
sr.sh_type = sh_type;
sr.reloc_count = reloc_count;
+ sr.output_section = os;
+ sr.needs_special_offset_handling = map_sections[shndx].offset == -1;
}
// Read the local symbols.
gold_assert(loccount == symtabshdr.get_sh_info());
off_t locsize = loccount * sym_size;
rd->local_symbols = this->get_lasting_view(symtabshdr.get_sh_offset(),
- locsize);
+ locsize, true);
}
}
{
target->scan_relocs(options, symtab, layout, this, p->data_shndx,
p->sh_type, p->contents->data(), p->reloc_count,
+ p->output_section, p->needs_special_offset_handling,
this->local_symbol_count_,
- local_symbols,
- this->symbols_);
+ local_symbols);
delete p->contents;
p->contents = NULL;
}
// Read the section headers.
const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(),
- shnum * This::shdr_size);
+ shnum * This::shdr_size,
+ true);
Views views;
views.resize(shnum);
for (unsigned int i = 1; i < shnum; ++i)
{
if (views[i].view != NULL)
- of->write_output_view(views[i].offset, views[i].view_size,
- views[i].view);
+ {
+ if (views[i].is_input_output_view)
+ of->write_input_output_view(views[i].offset, views[i].view_size,
+ views[i].view);
+ else
+ of->write_output_view(views[i].offset, views[i].view_size,
+ views[i].view);
+ }
}
// Write out the local symbols.
const Output_section* os = map_sections[i].output_section;
if (os == NULL)
continue;
+ off_t output_offset = map_sections[i].offset;
typename This::Shdr shdr(p);
if (shdr.get_sh_type() == elfcpp::SHT_NOBITS)
continue;
- off_t start = os->offset() + map_sections[i].offset;
- off_t sh_size = shdr.get_sh_size();
+ off_t view_start;
+ off_t view_size;
+ if (output_offset != -1)
+ {
+ view_start = os->offset() + output_offset;
+ view_size = shdr.get_sh_size();
+ }
+ else
+ {
+ view_start = os->offset();
+ view_size = os->data_size();
+ }
- if (sh_size == 0)
+ if (view_size == 0)
continue;
- gold_assert(map_sections[i].offset >= 0
- && map_sections[i].offset + sh_size <= os->data_size());
+ gold_assert(output_offset == -1
+ || (output_offset >= 0
+ && output_offset + view_size <= os->data_size()));
- unsigned char* view = of->get_output_view(start, sh_size);
- this->read(shdr.get_sh_offset(), sh_size, view);
+ unsigned char* view;
+ if (output_offset == -1)
+ view = of->get_input_output_view(view_start, view_size);
+ else
+ {
+ view = of->get_output_view(view_start, view_size);
+ this->read(shdr.get_sh_offset(), view_size, view);
+ }
pvs->view = view;
- pvs->address = os->address() + map_sections[i].offset;
- pvs->offset = start;
- pvs->view_size = sh_size;
+ pvs->address = os->address();
+ if (output_offset != -1)
+ pvs->address += output_offset;
+ pvs->offset = view_start;
+ pvs->view_size = view_size;
+ pvs->is_input_output_view = output_offset == -1;
}
}
unsigned int shnum = this->shnum();
Sized_target<size, big_endian>* target = this->sized_target();
+ std::vector<Map_to_output>& map_sections(this->map_to_output());
+
Relocate_info<size, big_endian> relinfo;
relinfo.options = &options;
relinfo.symtab = symtab;
relinfo.layout = layout;
relinfo.object = this;
- relinfo.local_symbol_count = this->local_symbol_count_;
- relinfo.local_values = &this->local_values_;
- relinfo.symbols = this->symbols_;
const unsigned char* p = pshdrs + This::shdr_size;
for (unsigned int i = 1; i < shnum; ++i, p += This::shdr_size)
unsigned int index = shdr.get_sh_info();
if (index >= this->shnum())
{
- fprintf(stderr, _("%s: %s: relocation section %u has bad info %u\n"),
- program_name, this->name().c_str(), i, index);
- gold_exit(false);
+ this->error(_("relocation section %u has bad info %u"),
+ i, index);
+ continue;
}
- if (!this->is_section_included(index))
+ Output_section* os = map_sections[index].output_section;
+ if (os == NULL)
{
// This relocation section is against a section which we
// discarded.
continue;
}
+ off_t output_offset = map_sections[index].offset;
gold_assert((*pviews)[index].view != NULL);
if (shdr.get_sh_link() != this->symtab_shndx_)
{
- fprintf(stderr,
- _("%s: %s: relocation section %u uses unexpected "
- "symbol table %u\n"),
- program_name, this->name().c_str(), i, shdr.get_sh_link());
- gold_exit(false);
+ gold_error(_("relocation section %u uses unexpected "
+ "symbol table %u"),
+ i, shdr.get_sh_link());
+ continue;
}
off_t sh_size = shdr.get_sh_size();
const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(),
- sh_size);
+ sh_size, false);
unsigned int reloc_size;
if (sh_type == elfcpp::SHT_REL)
if (reloc_size != shdr.get_sh_entsize())
{
- fprintf(stderr,
- _("%s: %s: unexpected entsize for reloc section %u: "
- "%lu != %u"),
- program_name, this->name().c_str(), i,
- static_cast<unsigned long>(shdr.get_sh_entsize()),
- reloc_size);
- gold_exit(false);
+ gold_error(_("unexpected entsize for reloc section %u: %lu != %u"),
+ i, static_cast<unsigned long>(shdr.get_sh_entsize()),
+ reloc_size);
+ continue;
}
size_t reloc_count = sh_size / reloc_size;
- if (reloc_count * reloc_size != sh_size)
+ if (static_cast<off_t>(reloc_count * reloc_size) != sh_size)
{
- fprintf(stderr, _("%s: %s: reloc section %u size %lu uneven"),
- program_name, this->name().c_str(), i,
- static_cast<unsigned long>(sh_size));
- gold_exit(false);
+ gold_error(_("reloc section %u size %lu uneven"),
+ i, static_cast<unsigned long>(sh_size));
+ continue;
}
relinfo.reloc_shndx = i;
sh_type,
prelocs,
reloc_count,
+ os,
+ output_offset == -1,
(*pviews)[index].view,
(*pviews)[index].address,
(*pviews)[index].view_size);
{
if (this->sym_ == NULL)
return false;
- if (this->sym_->is_defined_in_dynobj())
+ if (this->sym_->is_from_dynobj())
return true;
this->sym_ = NULL;
return false;
Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>* reloc_data)
{
this->sym_->set_needs_dynsym_entry();
- reloc_data->add_global(this->sym_, this->reloc_type_, this->relobj_,
- this->shndx_, this->address_);
+ reloc_data->add_global(this->sym_, this->reloc_type_, this->output_section_,
+ this->relobj_, this->shndx_, this->address_);
}
// Emit a reloc into a SHT_RELA section.
Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>* reloc_data)
{
this->sym_->set_needs_dynsym_entry();
- reloc_data->add_global(this->sym_, this->reloc_type_, this->relobj_,
- this->shndx_, this->address_, this->addend_);
+ reloc_data->add_global(this->sym_, this->reloc_type_, this->output_section_,
+ this->relobj_, this->shndx_, this->address_,
+ this->addend_);
}
// Copy_relocs methods.
Symbol* sym,
Relobj* relobj,
unsigned int shndx,
+ Output_section* output_section,
const elfcpp::Rel<size, big_endian>& rel)
{
unsigned int reloc_type = elfcpp::elf_r_type<size>(rel.get_r_info());
this->entries_.push_back(Copy_reloc_entry(sym, reloc_type, relobj, shndx,
- rel.get_r_offset(), 0));
+ output_section,
+ rel.get_r_offset(), 0));
}
// Save a Rela reloc.
Symbol* sym,
Relobj* relobj,
unsigned int shndx,
+ Output_section* output_section,
const elfcpp::Rela<size, big_endian>& rela)
{
unsigned int reloc_type = elfcpp::elf_r_type<size>(rela.get_r_info());
this->entries_.push_back(Copy_reloc_entry(sym, reloc_type, relobj, shndx,
+ output_section,
rela.get_r_offset(),
rela.get_r_addend()));
}
}
}
+// Track_relocs methods.
+
+// Initialize the class to track the relocs. This gets the object,
+// the reloc section index, and the type of the relocs. This returns
+// false if something goes wrong.
+
+template<int size, bool big_endian>
+bool
+Track_relocs<size, big_endian>::initialize(
+ Object* object,
+ unsigned int reloc_shndx,
+ unsigned int reloc_type)
+{
+ // If RELOC_SHNDX is -1U, it means there is more than one reloc
+ // section for the .eh_frame section. We can't handle that case.
+ if (reloc_shndx == -1U)
+ return false;
+
+ // If RELOC_SHNDX is 0, there is no reloc section.
+ if (reloc_shndx == 0)
+ return true;
+
+ // Get the contents of the reloc section.
+ this->prelocs_ = object->section_contents(reloc_shndx, &this->len_, false);
+
+ if (reloc_type == elfcpp::SHT_REL)
+ this->reloc_size_ = elfcpp::Elf_sizes<size>::rel_size;
+ else if (reloc_type == elfcpp::SHT_RELA)
+ this->reloc_size_ = elfcpp::Elf_sizes<size>::rela_size;
+ else
+ gold_unreachable();
+
+ if (this->len_ % this->reloc_size_ != 0)
+ {
+ object->error(_("reloc section size %zu is not a multiple of "
+ "reloc size %d\n"),
+ static_cast<size_t>(this->len_),
+ this->reloc_size_);
+ return false;
+ }
+
+ return true;
+}
+
+// Return the offset of the next reloc, or -1 if there isn't one.
+
+template<int size, bool big_endian>
+off_t
+Track_relocs<size, big_endian>::next_offset() const
+{
+ if (this->pos_ >= this->len_)
+ return -1;
+
+ // Rel and Rela start out the same, so we can always use Rel to find
+ // the r_offset value.
+ elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
+ return rel.get_r_offset();
+}
+
+// Return the index of the symbol referenced by the next reloc, or -1U
+// if there aren't any more relocs.
+
+template<int size, bool big_endian>
+unsigned int
+Track_relocs<size, big_endian>::next_symndx() const
+{
+ if (this->pos_ >= this->len_)
+ return -1U;
+
+ // Rel and Rela start out the same, so we can use Rel to find the
+ // symbol index.
+ elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
+ return elfcpp::elf_r_sym<size>(rel.get_r_info());
+}
+
+// Advance to the next reloc whose r_offset is greater than or equal
+// to OFFSET. Return the number of relocs we skip.
+
+template<int size, bool big_endian>
+int
+Track_relocs<size, big_endian>::advance(off_t offset)
+{
+ int ret = 0;
+ while (this->pos_ < this->len_)
+ {
+ // Rel and Rela start out the same, so we can always use Rel to
+ // find the r_offset value.
+ elfcpp::Rel<size, big_endian> rel(this->prelocs_ + this->pos_);
+ if (static_cast<off_t>(rel.get_r_offset()) >= offset)
+ break;
+ ++ret;
+ this->pos_ += this->reloc_size_;
+ }
+ return ret;
+}
+
// Instantiate the templates we need. We could use the configure
// script to restrict this to only the ones for implemented targets.
+#ifdef HAVE_TARGET_32_LITTLE
template
void
Sized_relobj<32, false>::do_read_relocs(Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
Sized_relobj<32, true>::do_read_relocs(Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
Sized_relobj<64, false>::do_read_relocs(Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
Sized_relobj<64, true>::do_read_relocs(Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_32_LITTLE
template
void
Sized_relobj<32, false>::do_scan_relocs(const General_options& options,
Symbol_table* symtab,
Layout* layout,
Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
Sized_relobj<32, true>::do_scan_relocs(const General_options& options,
Symbol_table* symtab,
Layout* layout,
Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
Sized_relobj<64, false>::do_scan_relocs(const General_options& options,
Symbol_table* symtab,
Layout* layout,
Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
Sized_relobj<64, true>::do_scan_relocs(const General_options& options,
Symbol_table* symtab,
Layout* layout,
Read_relocs_data* rd);
+#endif
+#ifdef HAVE_TARGET_32_LITTLE
template
void
Sized_relobj<32, false>::do_relocate(const General_options& options,
const Symbol_table* symtab,
const Layout* layout,
Output_file* of);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
Sized_relobj<32, true>::do_relocate(const General_options& options,
const Symbol_table* symtab,
const Layout* layout,
Output_file* of);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
Sized_relobj<64, false>::do_relocate(const General_options& options,
const Symbol_table* symtab,
const Layout* layout,
Output_file* of);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
Sized_relobj<64, true>::do_relocate(const General_options& options,
const Symbol_table* symtab,
const Layout* layout,
Output_file* of);
+#endif
+#ifdef HAVE_TARGET_32_LITTLE
template
class Copy_relocs<32, false>;
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
class Copy_relocs<32, true>;
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
class Copy_relocs<64, false>;
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
class Copy_relocs<64, true>;
+#endif
+#ifdef HAVE_TARGET_32_LITTLE
template
void
Copy_relocs<32, false>::emit<elfcpp::SHT_REL>(
Output_data_reloc<elfcpp::SHT_REL, true, 32, false>*);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
Copy_relocs<32, true>::emit<elfcpp::SHT_REL>(
Output_data_reloc<elfcpp::SHT_REL, true, 32, true>*);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
Copy_relocs<64, false>::emit<elfcpp::SHT_REL>(
Output_data_reloc<elfcpp::SHT_REL, true, 64, false>*);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
Copy_relocs<64, true>::emit<elfcpp::SHT_REL>(
Output_data_reloc<elfcpp::SHT_REL, true, 64, true>*);
+#endif
+#ifdef HAVE_TARGET_32_LITTLE
template
void
Copy_relocs<32, false>::emit<elfcpp::SHT_RELA>(
Output_data_reloc<elfcpp::SHT_RELA , true, 32, false>*);
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
void
Copy_relocs<32, true>::emit<elfcpp::SHT_RELA>(
Output_data_reloc<elfcpp::SHT_RELA, true, 32, true>*);
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
void
Copy_relocs<64, false>::emit<elfcpp::SHT_RELA>(
Output_data_reloc<elfcpp::SHT_RELA, true, 64, false>*);
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
void
Copy_relocs<64, true>::emit<elfcpp::SHT_RELA>(
Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>*);
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+class Track_relocs<32, false>;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+class Track_relocs<32, true>;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+class Track_relocs<64, false>;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+class Track_relocs<64, true>;
+#endif
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff