// dynobj.cc -- dynamic object support for gold
-// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright (C) 2006-2019 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// object's filename. The only exception is when the dynamic object
// is part of an archive (so the filename is the archive's
// filename). In that case, we use just the dynobj's name-in-archive.
- this->soname_ = this->input_file()->found_name();
- if (this->offset() != 0)
+ if (input_file == NULL)
+ this->soname_ = name;
+ else
{
- std::string::size_type open_paren = this->name().find('(');
- std::string::size_type close_paren = this->name().find(')');
- if (open_paren != std::string::npos && close_paren != std::string::npos)
+ this->soname_ = input_file->found_name();
+ if (this->offset() != 0)
{
- // It's an archive, and name() is of the form 'foo.a(bar.so)'.
- this->soname_ = this->name().substr(open_paren + 1,
- close_paren - (open_paren + 1));
+ std::string::size_type open_paren = this->name().find('(');
+ std::string::size_type close_paren = this->name().find(')');
+ if (open_paren != std::string::npos
+ && close_paren != std::string::npos)
+ {
+ // It's an archive, and name() is of the form 'foo.a(bar.so)'.
+ open_paren += 1;
+ this->soname_ = this->name().substr(open_paren,
+ close_paren - open_paren);
+ }
}
}
}
template<int size, bool big_endian>
void
Sized_dynobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
+{
+ this->base_read_symbols(sd);
+}
+
+// Read the symbols and sections from a dynamic object. We read the
+// dynamic symbols, not the normal symbols. This is common code for
+// all target-specific overrides of do_read_symbols().
+
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::base_read_symbols(Read_symbols_data* sd)
{
this->read_section_data(&this->elf_file_, sd);
sd->verneed_size = 0;
sd->verneed_info = 0;
+ const unsigned char* namesu = sd->section_names->data();
+ const char* names = reinterpret_cast<const char*>(namesu);
+ if (memmem(names, sd->section_names_size, ".zdebug_", 8) != NULL)
+ {
+ Compressed_section_map* compressed_sections =
+ build_compressed_section_map<size, big_endian>(
+ pshdrs, this->shnum(), names, sd->section_names_size, this, true);
+ if (compressed_sections != NULL)
+ this->set_compressed_sections(compressed_sections);
+ }
+
if (this->dynsym_shndx_ != -1U)
{
// Get the dynamic symbols.
Version_map version_map;
this->make_version_map(sd, &version_map);
- // If printing symbol counts or a cross reference table, we want to
- // track symbols.
+ // If printing symbol counts or a cross reference table or
+ // preparing for an incremental link, we want to track symbols.
if (parameters->options().user_set_print_symbol_counts()
- || parameters->options().cref())
+ || parameters->options().cref()
+ || parameters->incremental())
{
this->symbols_ = new Symbols();
this->symbols_->resize(symcount);
return Archive::SHOULD_INCLUDE_YES;
}
+// Iterate over global symbols, calling a visitor class V for each.
+
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::do_for_all_global_symbols(
+ Read_symbols_data* sd,
+ Library_base::Symbol_visitor_base* v)
+{
+ const char* sym_names =
+ reinterpret_cast<const char*>(sd->symbol_names->data());
+ const unsigned char* syms =
+ sd->symbols->data() + sd->external_symbols_offset;
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+ size_t symcount = ((sd->symbols_size - sd->external_symbols_offset)
+ / sym_size);
+ const unsigned char* p = syms;
+
+ for (size_t i = 0; i < symcount; ++i, p += sym_size)
+ {
+ elfcpp::Sym<size, big_endian> sym(p);
+ if (sym.get_st_shndx() != elfcpp::SHN_UNDEF
+ && sym.get_st_bind() != elfcpp::STB_LOCAL)
+ v->visit(sym_names + sym.get_st_name());
+ }
+}
+
+// Iterate over local symbols, calling a visitor class V for each GOT offset
+// associated with a local symbol.
+
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::do_for_all_local_got_entries(
+ Got_offset_list::Visitor*) const
+{
+}
+
// Get symbol counts.
template<int size, bool big_endian>
&& (*p)->source() == Symbol::FROM_OBJECT
&& (*p)->object() == this
&& (*p)->is_defined()
- && (*p)->dynsym_index() != -1U)
+ && (*p)->has_dynsym_index())
++count;
*used = count;
}
bucket[bucketpos] = dynsym_index;
}
+ int size = parameters->target().hash_entry_size();
unsigned int hashlen = ((2
+ bucketcount
+ local_dynsym_count
+ dynsym_count)
- * 4);
+ * size / 8);
unsigned char* phash = new unsigned char[hashlen];
- if (parameters->target().is_big_endian())
+ bool big_endian = parameters->target().is_big_endian();
+ if (size == 32)
{
+ if (big_endian)
+ {
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
- Dynobj::sized_create_elf_hash_table<true>(bucket, chain, phash,
- hashlen);
+ Dynobj::sized_create_elf_hash_table<32, true>(bucket, chain, phash,
+ hashlen);
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
+ Dynobj::sized_create_elf_hash_table<32, false>(bucket, chain, phash,
+ hashlen);
#else
- gold_unreachable();
+ gold_unreachable();
#endif
+ }
}
- else
+ else if (size == 64)
{
+ if (big_endian)
+ {
+#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
+ Dynobj::sized_create_elf_hash_table<64, true>(bucket, chain, phash,
+ hashlen);
+#else
+ gold_unreachable();
+#endif
+ }
+ else
+ {
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
- Dynobj::sized_create_elf_hash_table<false>(bucket, chain, phash,
- hashlen);
+ Dynobj::sized_create_elf_hash_table<64, false>(bucket, chain, phash,
+ hashlen);
#else
- gold_unreachable();
+ gold_unreachable();
#endif
+ }
}
+ else
+ gold_unreachable();
*pphash = phash;
*phashlen = hashlen;
// Fill in an ELF hash table.
-template<bool big_endian>
+template<int size, bool big_endian>
void
Dynobj::sized_create_elf_hash_table(const std::vector<uint32_t>& bucket,
const std::vector<uint32_t>& chain,
const unsigned int bucketcount = bucket.size();
const unsigned int chaincount = chain.size();
- elfcpp::Swap<32, big_endian>::writeval(p, bucketcount);
- p += 4;
- elfcpp::Swap<32, big_endian>::writeval(p, chaincount);
- p += 4;
+ elfcpp::Swap<size, big_endian>::writeval(p, bucketcount);
+ p += size / 8;
+ elfcpp::Swap<size, big_endian>::writeval(p, chaincount);
+ p += size / 8;
for (unsigned int i = 0; i < bucketcount; ++i)
{
- elfcpp::Swap<32, big_endian>::writeval(p, bucket[i]);
- p += 4;
+ elfcpp::Swap<size, big_endian>::writeval(p, bucket[i]);
+ p += size / 8;
}
for (unsigned int i = 0; i < chaincount; ++i)
{
- elfcpp::Swap<32, big_endian>::writeval(p, chain[i]);
- p += 4;
+ elfcpp::Swap<size, big_endian>::writeval(p, chain[i]);
+ p += size / 8;
}
gold_assert(static_cast<unsigned int>(p - phash) == hashlen);
Stringpool* dynpool)
: defs_(), needs_(), version_table_(),
is_finalized_(false), version_script_(version_script),
- needs_base_version_(parameters->options().shared())
+ needs_base_version_(true)
{
if (!this->version_script_.empty())
{
gold_assert(!this->is_finalized_);
gold_assert(sym->version() != NULL);
+ // A symbol defined as "sym@" is bound to an unspecified base version.
+ if (sym->version()[0] == '\0')
+ return;
+
Stringpool::Key version_key;
const char* version = dynpool->add(sym->version(), false, &version_key);
if (!sym->is_from_dynobj() && !sym->is_copied_from_dynobj())
{
- if (parameters->options().shared())
- this->add_def(sym, version, version_key);
+ this->add_def(dynpool, sym, version, version_key);
}
else
{
// We've found a symbol SYM defined in version VERSION.
void
-Versions::add_def(const Symbol* sym, const char* version,
+Versions::add_def(Stringpool* dynpool, const Symbol* sym, const char* version,
Stringpool::Key version_key)
{
Key k(version_key, 0);
if (parameters->options().shared())
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.
+ if (this->needs_base_version_)
+ this->define_base_version(dynpool);
Verdef* vd = new Verdef(version, std::vector<std::string>(),
false, false, false, false);
this->defs_.push_back(vd);
if (vn == NULL)
{
// Create base version definition lazily for shared library.
- if (this->needs_base_version_)
+ if (parameters->options().shared() && this->needs_base_version_)
this->define_base_version(dynpool);
// We have a new filename.
Key k;
if (!sym->is_from_dynobj() && !sym->is_copied_from_dynobj())
{
- if (!parameters->options().shared())
- return elfcpp::VER_NDX_GLOBAL;
k = Key(version_key, 0);
}
else
{
unsigned int version_index;
const char* version = (*p)->version();
- if (version != NULL)
- version_index = this->version_index(symtab, dynpool, *p);
- else
+ if (version == NULL)
{
if ((*p)->is_defined() && !(*p)->is_from_dynobj())
version_index = elfcpp::VER_NDX_GLOBAL;
else
version_index = elfcpp::VER_NDX_LOCAL;
}
+ else if (version[0] == '\0')
+ version_index = elfcpp::VER_NDX_GLOBAL;
+ else
+ version_index = this->version_index(symtab, dynpool, *p);
// If the symbol was defined as foo@V1 instead of foo@@V1, add
// the hidden bit.
- if ((*p)->version() != NULL && !(*p)->is_default())
+ if ((*p)->version() != NULL
+ && (*p)->is_defined()
+ && !(*p)->is_default()
+ && !(*p)->from_dyn())
version_index |= elfcpp::VERSYM_HIDDEN;
elfcpp::Swap<16, big_endian>::writeval(pbuf + (*p)->dynsym_index() * 2,
version_index);