// 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"
#include "object.h"
+#include "symtab.h"
#include "output.h"
#include "reloc.h"
rd->relocs.reserve(shnum / 2);
- const unsigned char *pshdrs = this->get_view(this->shoff_,
- shnum * This::shdr_size);
+ const unsigned char *pshdrs = this->get_view(this->elf_file_.shoff(),
+ 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)
if ((secshdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0)
continue;
- if (shdr.get_sh_link() != this->symtab_shnum_)
+ if (shdr.get_sh_link() != this->symtab_shndx_)
{
fprintf(stderr,
_("%s: %s: relocation section %u uses unexpected "
}
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,
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;
}
// Read the local symbols.
- if (this->symtab_shnum_ == 0 || this->local_symbol_count_ == 0)
+ gold_assert(this->symtab_shndx_ != -1U);
+ if (this->symtab_shndx_ == 0 || this->local_symbol_count_ == 0)
rd->local_symbols = NULL;
else
{
typename This::Shdr symtabshdr(pshdrs
- + this->symtab_shnum_ * This::shdr_size);
- assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
+ + this->symtab_shndx_ * This::shdr_size);
+ gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
const int sym_size = This::sym_size;
const unsigned int loccount = this->local_symbol_count_;
- assert(loccount == symtabshdr.get_sh_info());
+ 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);
}
}
p != rd->relocs.end();
++p)
{
- target->scan_relocs(options, symtab, layout, this, p->sh_type,
- p->contents->data(), p->reloc_count,
+ target->scan_relocs(options, symtab, layout, this, p->data_shndx,
+ p->sh_type, p->contents->data(), p->reloc_count,
this->local_symbol_count_,
local_symbols,
this->symbols_);
unsigned int shnum = this->shnum();
// Read the section headers.
- const unsigned char* pshdrs = this->get_view(this->shoff_,
- shnum * This::shdr_size);
+ const unsigned char* pshdrs = this->get_view(this->elf_file_.shoff(),
+ shnum * This::shdr_size,
+ true);
Views views;
views.resize(shnum);
pvs->view = NULL;
+ if (map_sections[i].offset == -1)
+ continue;
+
const Output_section* os = map_sections[i].output_section;
if (os == NULL)
continue;
if (sh_size == 0)
continue;
- assert(map_sections[i].offset >= 0
- && map_sections[i].offset + sh_size <= os->data_size());
+ gold_assert(map_sections[i].offset >= 0
+ && map_sections[i].offset + sh_size <= os->data_size());
unsigned char* view = of->get_output_view(start, sh_size);
this->read(shdr.get_sh_offset(), sh_size, view);
relinfo.layout = layout;
relinfo.object = this;
relinfo.local_symbol_count = this->local_symbol_count_;
- relinfo.values = this->values_;
+ relinfo.local_values = &this->local_values_;
relinfo.symbols = this->symbols_;
const unsigned char* p = pshdrs + This::shdr_size;
continue;
}
- assert((*pviews)[index].view != NULL);
+ gold_assert((*pviews)[index].view != NULL);
- if (shdr.get_sh_link() != this->symtab_shnum_)
+ if (shdr.get_sh_link() != this->symtab_shndx_)
{
fprintf(stderr,
_("%s: %s: relocation section %u uses unexpected "
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)
}
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,
}
}
+// Copy_relocs::Copy_reloc_entry methods.
+
+// Return whether we should emit this reloc. We should emit it if the
+// symbol is still defined in a dynamic object. If we should not emit
+// it, we clear it, to save ourselves the test next time.
+
+template<int size, bool big_endian>
+bool
+Copy_relocs<size, big_endian>::Copy_reloc_entry::should_emit()
+{
+ if (this->sym_ == NULL)
+ return false;
+ if (this->sym_->is_from_dynobj())
+ return true;
+ this->sym_ = NULL;
+ return false;
+}
+
+// Emit a reloc into a SHT_REL section.
+
+template<int size, bool big_endian>
+void
+Copy_relocs<size, big_endian>::Copy_reloc_entry::emit(
+ 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_);
+}
+
+// Emit a reloc into a SHT_RELA section.
+
+template<int size, bool big_endian>
+void
+Copy_relocs<size, big_endian>::Copy_reloc_entry::emit(
+ 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_);
+}
+
+// Copy_relocs methods.
+
+// Return whether we need a COPY reloc for a relocation against GSYM.
+// The relocation is being applied to section SHNDX in OBJECT.
+
+template<int size, bool big_endian>
+bool
+Copy_relocs<size, big_endian>::need_copy_reloc(
+ const General_options*,
+ Relobj* object,
+ unsigned int shndx,
+ Sized_symbol<size>* sym)
+{
+ // FIXME: Handle -z nocopyrelocs.
+
+ if (sym->symsize() == 0)
+ return false;
+
+ // If this is a readonly section, then we need a COPY reloc.
+ // Otherwise we can use a dynamic reloc.
+ if ((object->section_flags(shndx) & elfcpp::SHF_WRITE) == 0)
+ return true;
+
+ return false;
+}
+
+// Save a Rel reloc.
+
+template<int size, bool big_endian>
+void
+Copy_relocs<size, big_endian>::save(
+ Symbol* sym,
+ Relobj* relobj,
+ unsigned int shndx,
+ 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));
+}
+
+// Save a Rela reloc.
+
+template<int size, bool big_endian>
+void
+Copy_relocs<size, big_endian>::save(
+ Symbol* sym,
+ Relobj* relobj,
+ unsigned int shndx,
+ 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,
+ rela.get_r_offset(),
+ rela.get_r_addend()));
+}
+
+// Return whether there are any relocs to emit. We don't want to emit
+// a reloc if the symbol is no longer defined in a dynamic object.
+
+template<int size, bool big_endian>
+bool
+Copy_relocs<size, big_endian>::any_to_emit()
+{
+ for (typename Copy_reloc_entries::iterator p = this->entries_.begin();
+ p != this->entries_.end();
+ ++p)
+ {
+ if (p->should_emit())
+ return true;
+ }
+ return false;
+}
+
+// Emit relocs.
+
+template<int size, bool big_endian>
+template<int sh_type>
+void
+Copy_relocs<size, big_endian>::emit(
+ Output_data_reloc<sh_type, true, size, big_endian>* reloc_data)
+{
+ for (typename Copy_reloc_entries::iterator p = this->entries_.begin();
+ p != this->entries_.end();
+ ++p)
+ {
+ if (p->should_emit())
+ p->emit(reloc_data);
+ }
+}
+
// 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
} // End namespace gold.
projects / binutils-gdb.git / blobdiff