// dynobj.cc -- dynamic object support 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 <vector>
#include <cstring>
#include "elfcpp.h"
+#include "parameters.h"
#include "symtab.h"
#include "dynobj.h"
gold_exit(false);
}
- *view = this->get_lasting_view(shdr.get_sh_offset(), shdr.get_sh_size());
+ *view = this->get_lasting_view(shdr.get_sh_offset(), shdr.get_sh_size(),
+ false);
*view_size = shdr.get_sh_size();
*view_info = shdr.get_sh_info();
}
const off_t dynamic_size = dynamicshdr.get_sh_size();
const unsigned char* pdynamic = this->get_view(dynamicshdr.get_sh_offset(),
- dynamic_size);
+ dynamic_size, false);
const unsigned int link = dynamicshdr.get_sh_link();
if (link != strtab_shndx)
}
strtab_size = strtabshdr.get_sh_size();
- strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size);
+ strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size, false);
}
for (const unsigned char* p = pdynamic;
gold_assert(dynsymshdr.get_sh_type() == elfcpp::SHT_DYNSYM);
sd->symbols = this->get_lasting_view(dynsymshdr.get_sh_offset(),
- dynsymshdr.get_sh_size());
+ dynsymshdr.get_sh_size(), false);
sd->symbols_size = dynsymshdr.get_sh_size();
// Get the symbol names.
}
sd->symbol_names = this->get_lasting_view(strtabshdr.get_sh_offset(),
- strtabshdr.get_sh_size());
+ strtabshdr.get_sh_size(),
+ true);
sd->symbol_names_size = strtabshdr.get_sh_size();
// Get the version information.
template<int size, bool big_endian>
void
-Sized_dynobj<size, big_endian>::do_layout(const General_options&,
- Symbol_table* symtab,
+Sized_dynobj<size, big_endian>::do_layout(Symbol_table* symtab,
Layout*,
Read_symbols_data* sd)
{
unsigned int ndx,
const char* name) const
{
- gold_assert(ndx < version_map->size());
+ if (ndx >= version_map->size())
+ version_map->resize(ndx + 1);
if ((*version_map)[ndx] != NULL)
{
fprintf(stderr, _("%s: %s: duplicate definition for version %u\n"),
(*version_map)[ndx] = name;
}
-// Create a vector mapping version numbers to version strings.
+// Add mappings for the version definitions to VERSION_MAP.
template<int size, bool big_endian>
void
-Sized_dynobj<size, big_endian>::make_version_map(
+Sized_dynobj<size, big_endian>::make_verdef_map(
Read_symbols_data* sd,
Version_map* version_map) const
{
- if (sd->verdef == NULL && sd->verneed == NULL)
+ if (sd->verdef == NULL)
return;
- // First find the largest version index.
- unsigned int maxver = 0;
+ const char* names = reinterpret_cast<const char*>(sd->symbol_names->data());
+ off_t names_size = sd->symbol_names_size;
- if (sd->verdef != NULL)
+ const unsigned char* pverdef = sd->verdef->data();
+ off_t verdef_size = sd->verdef_size;
+ const unsigned int count = sd->verdef_info;
+
+ const unsigned char* p = pverdef;
+ for (unsigned int i = 0; i < count; ++i)
{
- const unsigned char* pverdef = sd->verdef->data();
- off_t verdef_size = sd->verdef_size;
- const unsigned int count = sd->verdef_info;
+ elfcpp::Verdef<size, big_endian> verdef(p);
- const unsigned char* p = pverdef;
- for (unsigned int i = 0; i < count; ++i)
+ if (verdef.get_vd_version() != elfcpp::VER_DEF_CURRENT)
{
- elfcpp::Verdef<size, big_endian> verdef(p);
-
- const unsigned int vd_ndx = verdef.get_vd_ndx();
+ fprintf(stderr, _("%s: %s: unexpected verdef version %u\n"),
+ program_name, this->name().c_str(), verdef.get_vd_version());
+ gold_exit(false);
+ }
- // The GNU linker clears the VERSYM_HIDDEN bit. I'm not
- // sure why.
+ const unsigned int vd_ndx = verdef.get_vd_ndx();
- if (vd_ndx > maxver)
- maxver = vd_ndx;
+ // The GNU linker clears the VERSYM_HIDDEN bit. I'm not
+ // sure why.
- const unsigned int vd_next = verdef.get_vd_next();
- if ((p - pverdef) + vd_next >= verdef_size)
- {
- fprintf(stderr,
- _("%s: %s: verdef vd_next field out of range: %u\n"),
- program_name, this->name().c_str(), vd_next);
- gold_exit(false);
- }
-
- p += vd_next;
+ // The first Verdaux holds the name of this version. Subsequent
+ // ones are versions that this one depends upon, which we don't
+ // care about here.
+ const unsigned int vd_cnt = verdef.get_vd_cnt();
+ if (vd_cnt < 1)
+ {
+ fprintf(stderr, _("%s: %s: verdef vd_cnt field too small: %u\n"),
+ program_name, this->name().c_str(), vd_cnt);
+ gold_exit(false);
}
- }
- if (sd->verneed != NULL)
- {
- const unsigned char* pverneed = sd->verneed->data();
- off_t verneed_size = sd->verneed_size;
- const unsigned int count = sd->verneed_info;
-
- const unsigned char* p = pverneed;
- for (unsigned int i = 0; i < count; ++i)
+ const unsigned int vd_aux = verdef.get_vd_aux();
+ if ((p - pverdef) + vd_aux >= verdef_size)
{
- elfcpp::Verneed<size, big_endian> verneed(p);
+ fprintf(stderr,
+ _("%s: %s: verdef vd_aux field out of range: %u\n"),
+ program_name, this->name().c_str(), vd_aux);
+ gold_exit(false);
+ }
- const unsigned int vn_aux = verneed.get_vn_aux();
- if ((p - pverneed) + vn_aux >= verneed_size)
- {
- fprintf(stderr,
- _("%s: %s: verneed vn_aux field out of range: %u\n"),
- program_name, this->name().c_str(), vn_aux);
- gold_exit(false);
- }
+ const unsigned char* pvda = p + vd_aux;
+ elfcpp::Verdaux<size, big_endian> verdaux(pvda);
- const unsigned int vn_cnt = verneed.get_vn_cnt();
- const unsigned char* pvna = p + vn_aux;
- for (unsigned int j = 0; j < vn_cnt; ++j)
- {
- elfcpp::Vernaux<size, big_endian> vernaux(pvna);
-
- const unsigned int vna_other = vernaux.get_vna_other();
- if (vna_other > maxver)
- maxver = vna_other;
-
- const unsigned int vna_next = vernaux.get_vna_next();
- if ((pvna - pverneed) + vna_next >= verneed_size)
- {
- fprintf(stderr,
- _("%s: %s: verneed vna_next field "
- "out of range: %u\n"),
- program_name, this->name().c_str(), vna_next);
- gold_exit(false);
- }
-
- pvna += vna_next;
- }
+ const unsigned int vda_name = verdaux.get_vda_name();
+ if (vda_name >= names_size)
+ {
+ fprintf(stderr,
+ _("%s: %s: verdaux vda_name field out of range: %u\n"),
+ program_name, this->name().c_str(), vda_name);
+ gold_exit(false);
+ }
- const unsigned int vn_next = verneed.get_vn_next();
- if ((p - pverneed) + vn_next >= verneed_size)
- {
- fprintf(stderr,
- _("%s: %s: verneed vn_next field out of range: %u\n"),
- program_name, this->name().c_str(), vn_next);
- gold_exit(false);
- }
+ this->set_version_map(version_map, vd_ndx, names + vda_name);
- p += vn_next;
+ const unsigned int vd_next = verdef.get_vd_next();
+ if ((p - pverdef) + vd_next >= verdef_size)
+ {
+ fprintf(stderr,
+ _("%s: %s: verdef vd_next field out of range: %u\n"),
+ program_name, this->name().c_str(), vd_next);
+ gold_exit(false);
}
+
+ p += vd_next;
}
+}
- // Now MAXVER is the largest version index we have seen.
+// Add mappings for the required versions to VERSION_MAP.
- version_map->resize(maxver + 1);
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::make_verneed_map(
+ Read_symbols_data* sd,
+ Version_map* version_map) const
+{
+ if (sd->verneed == NULL)
+ return;
const char* names = reinterpret_cast<const char*>(sd->symbol_names->data());
off_t names_size = sd->symbol_names_size;
- if (sd->verdef != NULL)
+ const unsigned char* pverneed = sd->verneed->data();
+ const off_t verneed_size = sd->verneed_size;
+ const unsigned int count = sd->verneed_info;
+
+ const unsigned char* p = pverneed;
+ for (unsigned int i = 0; i < count; ++i)
{
- const unsigned char* pverdef = sd->verdef->data();
- off_t verdef_size = sd->verdef_size;
- const unsigned int count = sd->verdef_info;
+ elfcpp::Verneed<size, big_endian> verneed(p);
- const unsigned char* p = pverdef;
- for (unsigned int i = 0; i < count; ++i)
+ if (verneed.get_vn_version() != elfcpp::VER_NEED_CURRENT)
{
- elfcpp::Verdef<size, big_endian> verdef(p);
+ fprintf(stderr, _("%s: %s: unexpected verneed version %u\n"),
+ program_name, this->name().c_str(),
+ verneed.get_vn_version());
+ gold_exit(false);
+ }
- const unsigned int vd_cnt = verdef.get_vd_cnt();
- if (vd_cnt < 1)
- {
- fprintf(stderr, _("%s: %s: verdef vd_cnt field too small: %u\n"),
- program_name, this->name().c_str(), vd_cnt);
- gold_exit(false);
- }
+ const unsigned int vn_aux = verneed.get_vn_aux();
- const unsigned int vd_aux = verdef.get_vd_aux();
- if ((p - pverdef) + vd_aux >= verdef_size)
- {
- fprintf(stderr,
- _("%s: %s: verdef vd_aux field out of range: %u\n"),
- program_name, this->name().c_str(), vd_aux);
- gold_exit(false);
- }
+ if ((p - pverneed) + vn_aux >= verneed_size)
+ {
+ fprintf(stderr,
+ _("%s: %s: verneed vn_aux field out of range: %u\n"),
+ program_name, this->name().c_str(), vn_aux);
+ gold_exit(false);
+ }
- const unsigned char* pvda = p + vd_aux;
- elfcpp::Verdaux<size, big_endian> verdaux(pvda);
+ const unsigned int vn_cnt = verneed.get_vn_cnt();
+ const unsigned char* pvna = p + vn_aux;
+ for (unsigned int j = 0; j < vn_cnt; ++j)
+ {
+ elfcpp::Vernaux<size, big_endian> vernaux(pvna);
- const unsigned int vda_name = verdaux.get_vda_name();
- if (vda_name >= names_size)
+ const unsigned int vna_name = vernaux.get_vna_name();
+ if (vna_name >= names_size)
{
fprintf(stderr,
- _("%s: %s: verdaux vda_name field out of range: %u\n"),
- program_name, this->name().c_str(), vda_name);
+ _("%s: %s: vernaux vna_name field "
+ "out of range: %u\n"),
+ program_name, this->name().c_str(), vna_name);
gold_exit(false);
}
- this->set_version_map(version_map, verdef.get_vd_ndx(),
- names + vda_name);
+ this->set_version_map(version_map, vernaux.get_vna_other(),
+ names + vna_name);
- const unsigned int vd_next = verdef.get_vd_next();
- if ((p - pverdef) + vd_next >= verdef_size)
+ const unsigned int vna_next = vernaux.get_vna_next();
+ if ((pvna - pverneed) + vna_next >= verneed_size)
{
fprintf(stderr,
- _("%s: %s: verdef vd_next field out of range: %u\n"),
- program_name, this->name().c_str(), vd_next);
+ _("%s: %s: verneed vna_next field "
+ "out of range: %u\n"),
+ program_name, this->name().c_str(), vna_next);
gold_exit(false);
}
- p += vd_next;
+ pvna += vna_next;
+ }
+
+ const unsigned int vn_next = verneed.get_vn_next();
+ if ((p - pverneed) + vn_next >= verneed_size)
+ {
+ fprintf(stderr,
+ _("%s: %s: verneed vn_next field out of range: %u\n"),
+ program_name, this->name().c_str(), vn_next);
+ gold_exit(false);
}
+
+ p += vn_next;
}
+}
- if (sd->verneed != NULL)
- {
- const unsigned char* pverneed = sd->verneed->data();
- const unsigned int count = sd->verneed_info;
+// Create a vector mapping version numbers to version strings.
- const unsigned char* p = pverneed;
- for (unsigned int i = 0; i < count; ++i)
- {
- elfcpp::Verneed<size, big_endian> verneed(p);
+template<int size, bool big_endian>
+void
+Sized_dynobj<size, big_endian>::make_version_map(
+ Read_symbols_data* sd,
+ Version_map* version_map) const
+{
+ if (sd->verdef == NULL && sd->verneed == NULL)
+ return;
- const unsigned int vn_aux = verneed.get_vn_aux();
- const unsigned int vn_cnt = verneed.get_vn_cnt();
- const unsigned char* pvna = p + vn_aux;
- for (unsigned int j = 0; j < vn_cnt; ++j)
- {
- elfcpp::Vernaux<size, big_endian> vernaux(pvna);
-
- const unsigned int vna_name = vernaux.get_vna_name();
- if (vna_name >= names_size)
- {
- fprintf(stderr,
- _("%s: %s: vernaux vna_name field "
- "out of range: %u\n"),
- program_name, this->name().c_str(), vna_name);
- gold_exit(false);
- }
-
- this->set_version_map(version_map, vernaux.get_vna_other(),
- names + vna_name);
-
- pvna += vernaux.get_vna_next();
- }
+ // A guess at the maximum version number we will see. If this is
+ // wrong we will be less efficient but still correct.
+ version_map->reserve(sd->verdef_info + sd->verneed_info * 10);
- p += verneed.get_vn_next();
- }
- }
+ this->make_verdef_map(sd, version_map);
+ this->make_verneed_map(sd, version_map);
}
// Add the dynamic symbols to the symbol table.
// symbol table.
void
-Dynobj::create_elf_hash_table(const Target* target,
- const std::vector<Symbol*>& dynsyms,
+Dynobj::create_elf_hash_table(const std::vector<Symbol*>& dynsyms,
unsigned int local_dynsym_count,
unsigned char** pphash,
unsigned int* phashlen)
* 4);
unsigned char* phash = new unsigned char[hashlen];
- if (target->is_big_endian())
- Dynobj::sized_create_elf_hash_table<true>(bucket, chain, phash, hashlen);
+ if (parameters->is_big_endian())
+ {
+#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
+ Dynobj::sized_create_elf_hash_table<true>(bucket, chain, phash,
+ hashlen);
+#else
+ gold_unreachable();
+#endif
+ }
else
- Dynobj::sized_create_elf_hash_table<false>(bucket, chain, phash, hashlen);
+ {
+#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
+ Dynobj::sized_create_elf_hash_table<false>(bucket, chain, phash,
+ hashlen);
+#else
+ gold_unreachable();
+#endif
+ }
*pphash = phash;
*phashlen = hashlen;
// symbol table.
void
-Dynobj::create_gnu_hash_table(const Target* target,
- const std::vector<Symbol*>& dynsyms,
+Dynobj::create_gnu_hash_table(const std::vector<Symbol*>& dynsyms,
unsigned int local_dynsym_count,
unsigned char** pphash,
unsigned int* phashlen)
// For the actual data generation we call out to a templatized
// function.
- int size = target->get_size();
- bool big_endian = target->is_big_endian();
+ int size = parameters->get_size();
+ bool big_endian = parameters->is_big_endian();
if (size == 32)
{
if (big_endian)
- Dynobj::sized_create_gnu_hash_table<32, true>(hashed_dynsyms,
- dynsym_hashvals,
- unhashed_dynsym_index,
- pphash,
- phashlen);
+ {
+#ifdef HAVE_TARGET_32_BIG
+ Dynobj::sized_create_gnu_hash_table<32, true>(hashed_dynsyms,
+ dynsym_hashvals,
+ unhashed_dynsym_index,
+ pphash,
+ phashlen);
+#else
+ gold_unreachable();
+#endif
+ }
else
- Dynobj::sized_create_gnu_hash_table<32, false>(hashed_dynsyms,
- dynsym_hashvals,
- unhashed_dynsym_index,
- pphash,
- phashlen);
+ {
+#ifdef HAVE_TARGET_32_LITTLE
+ Dynobj::sized_create_gnu_hash_table<32, false>(hashed_dynsyms,
+ dynsym_hashvals,
+ unhashed_dynsym_index,
+ pphash,
+ phashlen);
+#else
+ gold_unreachable();
+#endif
+ }
}
else if (size == 64)
{
if (big_endian)
- Dynobj::sized_create_gnu_hash_table<64, true>(hashed_dynsyms,
- dynsym_hashvals,
- unhashed_dynsym_index,
- pphash,
- phashlen);
+ {
+#ifdef HAVE_TARGET_64_BIG
+ Dynobj::sized_create_gnu_hash_table<64, true>(hashed_dynsyms,
+ dynsym_hashvals,
+ unhashed_dynsym_index,
+ pphash,
+ phashlen);
+#else
+ gold_unreachable();
+#endif
+ }
else
- Dynobj::sized_create_gnu_hash_table<64, false>(hashed_dynsyms,
- dynsym_hashvals,
- unhashed_dynsym_index,
- pphash,
- phashlen);
+ {
+#ifdef HAVE_TARGET_64_LITTLE
+ Dynobj::sized_create_gnu_hash_table<64, false>(hashed_dynsyms,
+ dynsym_hashvals,
+ unhashed_dynsym_index,
+ pphash,
+ phashlen);
+#else
+ gold_unreachable();
+#endif
+ }
}
else
gold_unreachable();
*pphash = phash;
}
+// Verdef methods.
+
+// Write this definition to a buffer for the output section.
+
+template<int size, bool big_endian>
+unsigned char*
+Verdef::write(const Stringpool* dynpool, bool is_last, unsigned char* pb
+ ACCEPT_SIZE_ENDIAN) const
+{
+ const int verdef_size = elfcpp::Elf_sizes<size>::verdef_size;
+ const int verdaux_size = elfcpp::Elf_sizes<size>::verdaux_size;
+
+ elfcpp::Verdef_write<size, big_endian> vd(pb);
+ vd.set_vd_version(elfcpp::VER_DEF_CURRENT);
+ vd.set_vd_flags((this->is_base_ ? elfcpp::VER_FLG_BASE : 0)
+ | (this->is_weak_ ? elfcpp::VER_FLG_WEAK : 0));
+ vd.set_vd_ndx(this->index());
+ vd.set_vd_cnt(1 + this->deps_.size());
+ vd.set_vd_hash(Dynobj::elf_hash(this->name()));
+ vd.set_vd_aux(verdef_size);
+ vd.set_vd_next(is_last
+ ? 0
+ : verdef_size + (1 + this->deps_.size()) * verdaux_size);
+ pb += verdef_size;
+
+ elfcpp::Verdaux_write<size, big_endian> vda(pb);
+ vda.set_vda_name(dynpool->get_offset(this->name()));
+ vda.set_vda_next(this->deps_.empty() ? 0 : verdaux_size);
+ pb += verdaux_size;
+
+ Deps::const_iterator p;
+ unsigned int i;
+ for (p = this->deps_.begin(), i = 0;
+ p != this->deps_.end();
+ ++p, ++i)
+ {
+ elfcpp::Verdaux_write<size, big_endian> vda(pb);
+ vda.set_vda_name(dynpool->get_offset(*p));
+ vda.set_vda_next(i + 1 >= this->deps_.size() ? 0 : verdaux_size);
+ pb += verdaux_size;
+ }
+
+ return pb;
+}
+
+// Verneed methods.
+
+Verneed::~Verneed()
+{
+ for (Need_versions::iterator p = this->need_versions_.begin();
+ p != this->need_versions_.end();
+ ++p)
+ delete *p;
+}
+
+// Add a new version to this file reference.
+
+Verneed_version*
+Verneed::add_name(const char* name)
+{
+ Verneed_version* vv = new Verneed_version(name);
+ this->need_versions_.push_back(vv);
+ return vv;
+}
+
+// Set the version indexes starting at INDEX.
+
+unsigned int
+Verneed::finalize(unsigned int index)
+{
+ for (Need_versions::iterator p = this->need_versions_.begin();
+ p != this->need_versions_.end();
+ ++p)
+ {
+ (*p)->set_index(index);
+ ++index;
+ }
+ return index;
+}
+
+// Write this list of referenced versions to a buffer for the output
+// section.
+
+template<int size, bool big_endian>
+unsigned char*
+Verneed::write(const Stringpool* dynpool, bool is_last,
+ unsigned char* pb ACCEPT_SIZE_ENDIAN) const
+{
+ const int verneed_size = elfcpp::Elf_sizes<size>::verneed_size;
+ const int vernaux_size = elfcpp::Elf_sizes<size>::vernaux_size;
+
+ elfcpp::Verneed_write<size, big_endian> vn(pb);
+ vn.set_vn_version(elfcpp::VER_NEED_CURRENT);
+ vn.set_vn_cnt(this->need_versions_.size());
+ vn.set_vn_file(dynpool->get_offset(this->filename()));
+ vn.set_vn_aux(verneed_size);
+ vn.set_vn_next(is_last
+ ? 0
+ : verneed_size + this->need_versions_.size() * vernaux_size);
+ pb += verneed_size;
+
+ Need_versions::const_iterator p;
+ unsigned int i;
+ for (p = this->need_versions_.begin(), i = 0;
+ p != this->need_versions_.end();
+ ++p, ++i)
+ {
+ elfcpp::Vernaux_write<size, big_endian> vna(pb);
+ vna.set_vna_hash(Dynobj::elf_hash((*p)->version()));
+ // FIXME: We need to sometimes set VER_FLG_WEAK here.
+ vna.set_vna_flags(0);
+ vna.set_vna_other((*p)->index());
+ vna.set_vna_name(dynpool->get_offset((*p)->version()));
+ vna.set_vna_next(i + 1 >= this->need_versions_.size()
+ ? 0
+ : vernaux_size);
+ pb += vernaux_size;
+ }
+
+ return pb;
+}
+
+// Versions methods.
+
+Versions::~Versions()
+{
+ for (Defs::iterator p = this->defs_.begin();
+ p != this->defs_.end();
+ ++p)
+ delete *p;
+
+ for (Needs::iterator p = this->needs_.begin();
+ p != this->needs_.end();
+ ++p)
+ delete *p;
+}
+
+// Record version information for a symbol going into the dynamic
+// symbol table.
+
+void
+Versions::record_version(const General_options* options,
+ Stringpool* dynpool, const Symbol* sym)
+{
+ gold_assert(!this->is_finalized_);
+ gold_assert(sym->version() != NULL);
+
+ Stringpool::Key version_key;
+ const char* version = dynpool->add(sym->version(), &version_key);
+
+ if (!sym->is_from_dynobj())
+ {
+ if (parameters->output_is_shared())
+ this->add_def(options, sym, version, version_key);
+ }
+ else
+ {
+ // This is a version reference.
+
+ Object* object = sym->object();
+ gold_assert(object->is_dynamic());
+ Dynobj* dynobj = static_cast<Dynobj*>(object);
+
+ this->add_need(dynpool, dynobj->soname(), version, version_key);
+ }
+}
+
+// We've found a symbol SYM defined in version VERSION.
+
+void
+Versions::add_def(const General_options* options, const Symbol* sym,
+ const char* version, Stringpool::Key version_key)
+{
+ Key k(version_key, 0);
+ Version_base* const vbnull = NULL;
+ std::pair<Version_table::iterator, bool> ins =
+ this->version_table_.insert(std::make_pair(k, vbnull));
+
+ if (!ins.second)
+ {
+ // We already have an entry for this version.
+ Version_base* vb = ins.first->second;
+
+ // We have now seen a symbol in this version, so it is not
+ // weak.
+ vb->clear_weak();
+
+ // FIXME: When we support version scripts, we will need to
+ // check whether this symbol should be forced local.
+ }
+ else
+ {
+ // If we are creating a shared object, it is an error to
+ // find a definition of a symbol with a version which is not
+ // in the version script.
+ if (parameters->output_is_shared())
+ {
+ fprintf(stderr, _("%s: symbol %s has undefined version %s\n"),
+ program_name, sym->name(), version);
+ gold_exit(false);
+ }
+
+ // If this is the first version we are defining, first define
+ // the base version. FIXME: Should use soname here when
+ // creating a shared object.
+ Verdef* vdbase = new Verdef(options->output_file_name(), true, false,
+ true);
+ this->defs_.push_back(vdbase);
+
+ // When creating a regular executable, automatically define
+ // a new version.
+ Verdef* vd = new Verdef(version, false, false, false);
+ this->defs_.push_back(vd);
+ ins.first->second = vd;
+ }
+}
+
+// Add a reference to version NAME in file FILENAME.
+
+void
+Versions::add_need(Stringpool* dynpool, const char* filename, const char* name,
+ Stringpool::Key name_key)
+{
+ Stringpool::Key filename_key;
+ filename = dynpool->add(filename, &filename_key);
+
+ Key k(name_key, filename_key);
+ Version_base* const vbnull = NULL;
+ std::pair<Version_table::iterator, bool> ins =
+ this->version_table_.insert(std::make_pair(k, vbnull));
+
+ if (!ins.second)
+ {
+ // We already have an entry for this filename/version.
+ return;
+ }
+
+ // See whether we already have this filename. We don't expect many
+ // version references, so we just do a linear search. This could be
+ // replaced by a hash table.
+ Verneed* vn = NULL;
+ for (Needs::iterator p = this->needs_.begin();
+ p != this->needs_.end();
+ ++p)
+ {
+ if ((*p)->filename() == filename)
+ {
+ vn = *p;
+ break;
+ }
+ }
+
+ if (vn == NULL)
+ {
+ // We have a new filename.
+ vn = new Verneed(filename);
+ this->needs_.push_back(vn);
+ }
+
+ ins.first->second = vn->add_name(name);
+}
+
+// Set the version indexes. Create a new dynamic version symbol for
+// each new version definition.
+
+unsigned int
+Versions::finalize(const Target* target, Symbol_table* symtab,
+ unsigned int dynsym_index, std::vector<Symbol*>* syms)
+{
+ gold_assert(!this->is_finalized_);
+
+ unsigned int vi = 1;
+
+ for (Defs::iterator p = this->defs_.begin();
+ p != this->defs_.end();
+ ++p)
+ {
+ (*p)->set_index(vi);
+ ++vi;
+
+ // Create a version symbol if necessary.
+ if (!(*p)->is_symbol_created())
+ {
+ Symbol* vsym = symtab->define_as_constant(target, (*p)->name(),
+ (*p)->name(), 0, 0,
+ elfcpp::STT_OBJECT,
+ elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0,
+ false);
+ vsym->set_needs_dynsym_entry();
+ vsym->set_dynsym_index(dynsym_index);
+ ++dynsym_index;
+ syms->push_back(vsym);
+ // The name is already in the dynamic pool.
+ }
+ }
+
+ // Index 1 is used for global symbols.
+ if (vi == 1)
+ {
+ gold_assert(this->defs_.empty());
+ vi = 2;
+ }
+
+ for (Needs::iterator p = this->needs_.begin();
+ p != this->needs_.end();
+ ++p)
+ vi = (*p)->finalize(vi);
+
+ this->is_finalized_ = true;
+
+ return dynsym_index;
+}
+
+// Return the version index to use for a symbol. This does two hash
+// table lookups: one in DYNPOOL and one in this->version_table_.
+// Another approach alternative would be store a pointer in SYM, which
+// would increase the size of the symbol table. Or perhaps we could
+// use a hash table from dynamic symbol pointer values to Version_base
+// pointers.
+
+unsigned int
+Versions::version_index(const Stringpool* dynpool, const Symbol* sym) const
+{
+ Stringpool::Key version_key;
+ const char* version = dynpool->find(sym->version(), &version_key);
+ gold_assert(version != NULL);
+
+ Key k;
+ if (!sym->is_from_dynobj())
+ {
+ if (!parameters->output_is_shared())
+ return elfcpp::VER_NDX_GLOBAL;
+ k = Key(version_key, 0);
+ }
+ else
+ {
+ Object* object = sym->object();
+ gold_assert(object->is_dynamic());
+ Dynobj* dynobj = static_cast<Dynobj*>(object);
+
+ Stringpool::Key filename_key;
+ const char* filename = dynpool->find(dynobj->soname(), &filename_key);
+ gold_assert(filename != NULL);
+
+ k = Key(version_key, filename_key);
+ }
+
+ Version_table::const_iterator p = this->version_table_.find(k);
+ gold_assert(p != this->version_table_.end());
+
+ return p->second->index();
+}
+
+// Return an allocated buffer holding the contents of the symbol
+// version section.
+
+template<int size, bool big_endian>
+void
+Versions::symbol_section_contents(const Stringpool* dynpool,
+ unsigned int local_symcount,
+ const std::vector<Symbol*>& syms,
+ unsigned char** pp,
+ unsigned int* psize
+ ACCEPT_SIZE_ENDIAN) const
+{
+ gold_assert(this->is_finalized_);
+
+ unsigned int sz = (local_symcount + syms.size()) * 2;
+ unsigned char* pbuf = new unsigned char[sz];
+
+ for (unsigned int i = 0; i < local_symcount; ++i)
+ elfcpp::Swap<16, big_endian>::writeval(pbuf + i * 2,
+ elfcpp::VER_NDX_LOCAL);
+
+ for (std::vector<Symbol*>::const_iterator p = syms.begin();
+ p != syms.end();
+ ++p)
+ {
+ unsigned int version_index;
+ const char* version = (*p)->version();
+ if (version == NULL)
+ version_index = elfcpp::VER_NDX_GLOBAL;
+ else
+ version_index = this->version_index(dynpool, *p);
+ elfcpp::Swap<16, big_endian>::writeval(pbuf + (*p)->dynsym_index() * 2,
+ version_index);
+ }
+
+ *pp = pbuf;
+ *psize = sz;
+}
+
+// Return an allocated buffer holding the contents of the version
+// definition section.
+
+template<int size, bool big_endian>
+void
+Versions::def_section_contents(const Stringpool* dynpool,
+ unsigned char** pp, unsigned int* psize,
+ unsigned int* pentries
+ ACCEPT_SIZE_ENDIAN) const
+{
+ gold_assert(this->is_finalized_);
+ gold_assert(!this->defs_.empty());
+
+ const int verdef_size = elfcpp::Elf_sizes<size>::verdef_size;
+ const int verdaux_size = elfcpp::Elf_sizes<size>::verdaux_size;
+
+ unsigned int sz = 0;
+ for (Defs::const_iterator p = this->defs_.begin();
+ p != this->defs_.end();
+ ++p)
+ {
+ sz += verdef_size + verdaux_size;
+ sz += (*p)->count_dependencies() * verdaux_size;
+ }
+
+ unsigned char* pbuf = new unsigned char[sz];
+
+ unsigned char* pb = pbuf;
+ Defs::const_iterator p;
+ unsigned int i;
+ for (p = this->defs_.begin(), i = 0;
+ p != this->defs_.end();
+ ++p, ++i)
+ pb = (*p)->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)(
+ dynpool, i + 1 >= this->defs_.size(), pb
+ SELECT_SIZE_ENDIAN(size, big_endian));
+
+ gold_assert(static_cast<unsigned int>(pb - pbuf) == sz);
+
+ *pp = pbuf;
+ *psize = sz;
+ *pentries = this->defs_.size();
+}
+
+// Return an allocated buffer holding the contents of the version
+// reference section.
+
+template<int size, bool big_endian>
+void
+Versions::need_section_contents(const Stringpool* dynpool,
+ unsigned char** pp, unsigned int *psize,
+ unsigned int *pentries
+ ACCEPT_SIZE_ENDIAN) const
+{
+ gold_assert(this->is_finalized_);
+ gold_assert(!this->needs_.empty());
+
+ const int verneed_size = elfcpp::Elf_sizes<size>::verneed_size;
+ const int vernaux_size = elfcpp::Elf_sizes<size>::vernaux_size;
+
+ unsigned int sz = 0;
+ for (Needs::const_iterator p = this->needs_.begin();
+ p != this->needs_.end();
+ ++p)
+ {
+ sz += verneed_size;
+ sz += (*p)->count_versions() * vernaux_size;
+ }
+
+ unsigned char* pbuf = new unsigned char[sz];
+
+ unsigned char* pb = pbuf;
+ Needs::const_iterator p;
+ unsigned int i;
+ for (p = this->needs_.begin(), i = 0;
+ p != this->needs_.end();
+ ++p, ++i)
+ pb = (*p)->write SELECT_SIZE_ENDIAN_NAME(size, big_endian)(
+ dynpool, i + 1 >= this->needs_.size(), pb
+ SELECT_SIZE_ENDIAN(size, big_endian));
+
+ gold_assert(static_cast<unsigned int>(pb - pbuf) == sz);
+
+ *pp = pbuf;
+ *psize = sz;
+ *pentries = this->needs_.size();
+}
+
// 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
class Sized_dynobj<32, false>;
+#endif
+#ifdef HAVE_TARGET_32_BIG
template
class Sized_dynobj<32, true>;
+#endif
+#ifdef HAVE_TARGET_64_LITTLE
template
class Sized_dynobj<64, false>;
+#endif
+#ifdef HAVE_TARGET_64_BIG
template
class Sized_dynobj<64, true>;
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+void
+Versions::symbol_section_contents<32, false>(
+ const Stringpool*,
+ unsigned int,
+ const std::vector<Symbol*>&,
+ unsigned char**,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+void
+Versions::symbol_section_contents<32, true>(
+ const Stringpool*,
+ unsigned int,
+ const std::vector<Symbol*>&,
+ unsigned char**,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+void
+Versions::symbol_section_contents<64, false>(
+ const Stringpool*,
+ unsigned int,
+ const std::vector<Symbol*>&,
+ unsigned char**,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+void
+Versions::symbol_section_contents<64, true>(
+ const Stringpool*,
+ unsigned int,
+ const std::vector<Symbol*>&,
+ unsigned char**,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+void
+Versions::def_section_contents<32, false>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+void
+Versions::def_section_contents<32, true>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+void
+Versions::def_section_contents<64, false>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+void
+Versions::def_section_contents<64, true>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+void
+Versions::need_section_contents<32, false>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+void
+Versions::need_section_contents<32, true>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+void
+Versions::need_section_contents<64, false>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+void
+Versions::need_section_contents<64, true>(
+ const Stringpool*,
+ unsigned char**,
+ unsigned int*,
+ unsigned int*
+ ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+#endif
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff