off_t offset,
const elfcpp::Ehdr<size, big_endian>& ehdr)
: Dynobj(name, input_file, offset),
- elf_file_(this, ehdr)
+ elf_file_(this, ehdr),
+ dynsym_shndx_(-1U),
+ symbols_(NULL),
+ defined_count_(0)
{
}
template<int size, bool big_endian>
void
-Sized_dynobj<size, big_endian>::setup(
- const elfcpp::Ehdr<size, big_endian>& ehdr)
+Sized_dynobj<size, big_endian>::setup()
{
- this->set_target(ehdr.get_e_machine(), size, big_endian,
- ehdr.get_e_ident()[elfcpp::EI_OSABI],
- ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
-
const unsigned int shnum = this->elf_file_.shnum();
this->set_shnum(shnum);
}
void
Sized_dynobj<size, big_endian>::find_dynsym_sections(
const unsigned char* pshdrs,
- unsigned int* pdynsym_shndx,
unsigned int* pversym_shndx,
unsigned int* pverdef_shndx,
unsigned int* pverneed_shndx,
unsigned int* pdynamic_shndx)
{
- *pdynsym_shndx = -1U;
*pversym_shndx = -1U;
*pverdef_shndx = -1U;
*pverneed_shndx = -1U;
*pdynamic_shndx = -1U;
+ unsigned int xindex_shndx = 0;
+ unsigned int xindex_link = 0;
const unsigned int shnum = this->shnum();
const unsigned char* p = pshdrs;
for (unsigned int i = 0; i < shnum; ++i, p += This::shdr_size)
switch (shdr.get_sh_type())
{
case elfcpp::SHT_DYNSYM:
- pi = pdynsym_shndx;
+ this->dynsym_shndx_ = i;
+ if (xindex_shndx > 0 && xindex_link == i)
+ {
+ Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset());
+ xindex->read_symtab_xindex<size, big_endian>(this, xindex_shndx,
+ pshdrs);
+ this->set_xindex(xindex);
+ }
+ pi = NULL;
break;
case elfcpp::SHT_GNU_versym:
pi = pversym_shndx;
case elfcpp::SHT_DYNAMIC:
pi = pdynamic_shndx;
break;
+ case elfcpp::SHT_SYMTAB_SHNDX:
+ xindex_shndx = i;
+ xindex_link = this->adjust_shndx(shdr.get_sh_link());
+ if (xindex_link == this->dynsym_shndx_)
+ {
+ Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset());
+ xindex->read_symtab_xindex<size, big_endian>(this, xindex_shndx,
+ pshdrs);
+ this->set_xindex(xindex);
+ }
+ pi = NULL;
+ break;
default:
pi = NULL;
break;
gold_assert(shdr.get_sh_type() == type);
- if (shdr.get_sh_link() != link)
+ if (this->adjust_shndx(shdr.get_sh_link()) != link)
this->error(_("unexpected link in section %u header: %u != %u"),
- shndx, shdr.get_sh_link(), link);
+ shndx, this->adjust_shndx(shdr.get_sh_link()), link);
*view = this->get_lasting_view(shdr.get_sh_offset(), shdr.get_sh_size(),
true, false);
const unsigned char* pdynamic = this->get_view(dynamicshdr.get_sh_offset(),
dynamic_size, true, false);
- const unsigned int link = dynamicshdr.get_sh_link();
+ const unsigned int link = this->adjust_shndx(dynamicshdr.get_sh_link());
if (link != strtab_shndx)
{
if (link >= this->shnum())
const unsigned char* const pshdrs = sd->section_headers->data();
- unsigned int dynsym_shndx;
unsigned int versym_shndx;
unsigned int verdef_shndx;
unsigned int verneed_shndx;
unsigned int dynamic_shndx;
- this->find_dynsym_sections(pshdrs, &dynsym_shndx, &versym_shndx,
- &verdef_shndx, &verneed_shndx, &dynamic_shndx);
+ this->find_dynsym_sections(pshdrs, &versym_shndx, &verdef_shndx,
+ &verneed_shndx, &dynamic_shndx);
unsigned int strtab_shndx = -1U;
sd->external_symbols_offset = 0;
sd->symbol_names = NULL;
sd->symbol_names_size = 0;
-
- if (dynsym_shndx != -1U)
+ sd->versym = NULL;
+ sd->versym_size = 0;
+ sd->verdef = NULL;
+ sd->verdef_size = 0;
+ sd->verdef_info = 0;
+ sd->verneed = NULL;
+ sd->verneed_size = 0;
+ sd->verneed_info = 0;
+
+ if (this->dynsym_shndx_ != -1U)
{
// Get the dynamic symbols.
- typename This::Shdr dynsymshdr(pshdrs + dynsym_shndx * This::shdr_size);
+ typename This::Shdr dynsymshdr(pshdrs
+ + this->dynsym_shndx_ * This::shdr_size);
gold_assert(dynsymshdr.get_sh_type() == elfcpp::SHT_DYNSYM);
sd->symbols = this->get_lasting_view(dynsymshdr.get_sh_offset(),
convert_to_section_size_type(dynsymshdr.get_sh_size());
// Get the symbol names.
- strtab_shndx = dynsymshdr.get_sh_link();
+ strtab_shndx = this->adjust_shndx(dynsymshdr.get_sh_link());
if (strtab_shndx >= this->shnum())
{
this->error(_("invalid dynamic symbol table name index: %u"),
unsigned int dummy;
this->read_dynsym_section(pshdrs, versym_shndx, elfcpp::SHT_GNU_versym,
- dynsym_shndx, &sd->versym, &sd->versym_size,
- &dummy);
+ this->dynsym_shndx_,
+ &sd->versym, &sd->versym_size, &dummy);
// We require that the version definition and need section link
// to the same string table as the dynamic symbol table. This
sd->symbol_names_size);
}
+// Return the Xindex structure to use for object with lots of
+// sections.
+
+template<int size, bool big_endian>
+Xindex*
+Sized_dynobj<size, big_endian>::do_initialize_xindex()
+{
+ gold_assert(this->dynsym_shndx_ != -1U);
+ Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset());
+ xindex->initialize_symtab_xindex<size, big_endian>(this, this->dynsym_shndx_);
+ return xindex;
+}
+
// Lay out the input sections for a dynamic object. We don't want to
// include sections from a dynamic object, so all that we actually do
-// here is check for .gnu.warning sections.
+// here is check for .gnu.warning and .note.GNU-split-stack sections.
template<int size, bool big_endian>
void
const char* name = pnames + shdr.get_sh_name();
this->handle_gnu_warning_section(name, i, symtab);
+ this->handle_split_stack_section(name);
}
delete sd->section_headers;
template<int size, bool big_endian>
void
Sized_dynobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
- Read_symbols_data* sd)
+ Read_symbols_data* sd,
+ Layout*)
{
if (sd->symbols == NULL)
{
Version_map version_map;
this->make_version_map(sd, &version_map);
+ // If printing symbol counts, we want to track symbols.
+
+ if (parameters->options().user_set_print_symbol_counts())
+ {
+ this->symbols_ = new Symbols();
+ this->symbols_->resize(symcount);
+ }
+
const char* sym_names =
reinterpret_cast<const char*>(sd->symbol_names->data());
symtab->add_from_dynobj(this, sd->symbols->data(), symcount,
? NULL
: sd->versym->data()),
sd->versym_size,
- &version_map);
+ &version_map,
+ this->symbols_,
+ &this->defined_count_);
delete sd->symbols;
sd->symbols = NULL;
this->clear_view_cache_marks();
}
+// Get symbol counts.
+
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::do_get_global_symbol_counts(
+ const Symbol_table*,
+ size_t* defined,
+ size_t* used) const
+{
+ *defined = this->defined_count_;
+ size_t count = 0;
+ for (typename Symbols::const_iterator p = this->symbols_->begin();
+ p != this->symbols_->end();
+ ++p)
+ if (*p != NULL
+ && (*p)->source() == Symbol::FROM_OBJECT
+ && (*p)->object() == this
+ && (*p)->is_defined()
+ && (*p)->dynsym_index() != -1U)
+ ++count;
+ *used = count;
+}
+
// Given a vector of hash codes, compute the number of hash buckets to
// use.
Versions::Versions(const Version_script_info& version_script,
Stringpool* dynpool)
: defs_(), needs_(), version_table_(),
- is_finalized_(false), version_script_(version_script)
+ is_finalized_(false), version_script_(version_script),
+ needs_base_version_(parameters->options().shared())
{
- // We always need a base version, so define that first. Nothing
- // explicitly declares itself as part of base, so it doesn't need to
- // be in version_table_.
- // FIXME: Should use soname here when creating a shared object. Is
- // this fixme still valid? It looks like it's doing the right thing
- // to me.
- if (parameters->options().shared())
- {
- const char* name = dynpool->add(parameters->options().output_file_name(),
- false, NULL);
- Verdef* vdbase = new Verdef(name, std::vector<std::string>(),
- true, false, true);
- this->defs_.push_back(vdbase);
- }
-
if (!this->version_script_.empty())
{
// Parse the version script, and insert each declared version into
// defs_ and version_table_.
std::vector<std::string> versions = this->version_script_.get_versions();
+
+ if (this->needs_base_version_ && !versions.empty())
+ this->define_base_version(dynpool);
+
for (size_t k = 0; k < versions.size(); ++k)
{
Stringpool::Key version_key;
delete *p;
}
+// Define the base version of a shared library. The base version definition
+// must be the first entry in defs_. We insert it lazily so that defs_ is
+// empty if no symbol versioning is used. Then layout can just drop the
+// version sections.
+
+void
+Versions::define_base_version(Stringpool* dynpool)
+{
+ // If we do any versioning at all, we always need a base version, so
+ // define that first. Nothing explicitly declares itself as part of base,
+ // so it doesn't need to be in version_table_.
+ gold_assert(this->defs_.empty());
+ const char* name = parameters->options().soname();
+ if (name == NULL)
+ name = parameters->options().output_file_name();
+ name = dynpool->add(name, false, NULL);
+ Verdef* vdbase = new Verdef(name, std::vector<std::string>(),
+ true, false, true);
+ this->defs_.push_back(vdbase);
+ this->needs_base_version_ = false;
+}
+
// Return the dynamic object which a symbol refers to.
Dynobj*
// find a definition of a symbol with a version which is not
// in the version script.
if (parameters->options().shared())
- {
- gold_error(_("symbol %s has undefined version %s"),
- sym->demangled_name().c_str(), version);
- return;
- }
-
+ gold_error(_("symbol %s has undefined version %s"),
+ sym->demangled_name().c_str(), version);
+ else
+ // We only insert a base version for shared library.
+ gold_assert(!this->needs_base_version_);
+
// When creating a regular executable, automatically define
// a new version.
Verdef* vd = new Verdef(version, std::vector<std::string>(),
if (vn == NULL)
{
+ // Create base version definition lazily for shared library.
+ if (this->needs_base_version_)
+ this->define_base_version(dynpool);
+
// We have a new filename.
vn = new Verneed(filename);
this->needs_.push_back(vn);
if (!(*p)->is_symbol_created())
{
Symbol* vsym = symtab->define_as_constant((*p)->name(),
- (*p)->name(), 0, 0,
+ (*p)->name(),
+ Symbol_table::PREDEFINED,
+ 0, 0,
elfcpp::STT_OBJECT,
elfcpp::STB_GLOBAL,
elfcpp::STV_DEFAULT, 0,
OSDN Git Service
