// dynobj.cc -- dynamic object support for gold
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "elfcpp.h"
#include "parameters.h"
+#include "script.h"
#include "symtab.h"
#include "dynobj.h"
// Class Dynobj.
-// Return the string to use in a DT_NEEDED entry.
+// Sets up the default soname_ to use, in the (rare) cases we never
+// see a DT_SONAME entry.
-const char*
-Dynobj::soname() const
+Dynobj::Dynobj(const std::string& name, Input_file* input_file, off_t offset)
+ : Object(name, input_file, true, offset),
+ needed_(),
+ unknown_needed_(UNKNOWN_NEEDED_UNSET)
{
- if (!this->soname_.empty())
- return this->soname_.c_str();
- return this->input_file()->found_name().c_str();
+ // This will be overridden by a DT_SONAME entry, hopefully. But if
+ // we never see a DT_SONAME entry, our rule is to use the dynamic
+ // 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.
+ if (input_file == NULL)
+ this->soname_ = name;
+ else
+ {
+ this->soname_ = input_file->found_name();
+ if (this->offset() != 0)
+ {
+ 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);
+ }
+ }
+ }
}
// Class Sized_dynobj.
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 symtab_shndx = 0;
+ 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_SYMTAB:
+ symtab_shndx = i;
+ 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;
*pi = i;
}
+
+ // If there is no dynamic symbol table, use the normal symbol table.
+ // On some SVR4 systems, a shared library is stored in an archive.
+ // The version stored in the archive only has a normal symbol table.
+ // It has an SONAME entry which points to another copy in the file
+ // system which has a dynamic symbol table as usual. This is way of
+ // addressing the issues which glibc addresses using GROUP with
+ // libc_nonshared.a.
+ if (this->dynsym_shndx_ == -1U && symtab_shndx != 0)
+ {
+ this->dynsym_shndx_ = symtab_shndx;
+ if (xindex_shndx > 0 && xindex_link == symtab_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);
+ }
+ }
}
// Read the contents of section SHNDX. PSHDRS points to the section
elfcpp::SHT type,
unsigned int link,
File_view** view,
- off_t* view_size,
+ section_size_type* view_size,
unsigned int* view_info)
{
if (shndx == -1U)
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(),
- false);
- *view_size = shdr.get_sh_size();
+ true, false);
+ *view_size = convert_to_section_size_type(shdr.get_sh_size());
*view_info = shdr.get_sh_info();
}
-// Set the soname field if this shared object has a DT_SONAME tag.
-// PSHDRS points to the section headers. DYNAMIC_SHNDX is the section
-// index of the SHT_DYNAMIC section. STRTAB_SHNDX, STRTAB, and
-// STRTAB_SIZE are the section index and contents of a string table
-// which may be the one associated with the SHT_DYNAMIC section.
+// Read the dynamic tags. Set the soname field if this shared object
+// has a DT_SONAME tag. Record the DT_NEEDED tags. PSHDRS points to
+// the section headers. DYNAMIC_SHNDX is the section index of the
+// SHT_DYNAMIC section. STRTAB_SHNDX, STRTAB, and STRTAB_SIZE are the
+// section index and contents of a string table which may be the one
+// associated with the SHT_DYNAMIC section.
template<int size, bool big_endian>
void
-Sized_dynobj<size, big_endian>::set_soname(const unsigned char* pshdrs,
- unsigned int dynamic_shndx,
- unsigned int strtab_shndx,
- const unsigned char* strtabu,
- off_t strtab_size)
+Sized_dynobj<size, big_endian>::read_dynamic(const unsigned char* pshdrs,
+ unsigned int dynamic_shndx,
+ unsigned int strtab_shndx,
+ const unsigned char* strtabu,
+ off_t strtab_size)
{
typename This::Shdr dynamicshdr(pshdrs + dynamic_shndx * This::shdr_size);
gold_assert(dynamicshdr.get_sh_type() == elfcpp::SHT_DYNAMIC);
const off_t dynamic_size = dynamicshdr.get_sh_size();
const unsigned char* pdynamic = this->get_view(dynamicshdr.get_sh_offset(),
- dynamic_size, false);
+ 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())
}
strtab_size = strtabshdr.get_sh_size();
- strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size, false);
+ strtabu = this->get_view(strtabshdr.get_sh_offset(), strtab_size, false,
+ false);
}
+ const char* const strtab = reinterpret_cast<const char*>(strtabu);
+
for (const unsigned char* p = pdynamic;
p < pdynamic + dynamic_size;
p += This::dyn_size)
{
typename This::Dyn dyn(p);
- if (dyn.get_d_tag() == elfcpp::DT_SONAME)
+ switch (dyn.get_d_tag())
{
- off_t val = dyn.get_d_val();
- if (val >= strtab_size)
- {
+ case elfcpp::DT_NULL:
+ // We should always see DT_NULL at the end of the dynamic
+ // tags.
+ return;
+
+ case elfcpp::DT_SONAME:
+ {
+ off_t val = dyn.get_d_val();
+ if (val >= strtab_size)
this->error(_("DT_SONAME value out of range: %lld >= %lld"),
- static_cast<long long>(val),
- static_cast<long long>(strtab_size));
- return;
- }
+ static_cast<long long>(val),
+ static_cast<long long>(strtab_size));
+ else
+ this->set_soname_string(strtab + val);
+ }
+ break;
- const char* strtab = reinterpret_cast<const char*>(strtabu);
- this->set_soname_string(strtab + val);
- return;
- }
+ case elfcpp::DT_NEEDED:
+ {
+ off_t val = dyn.get_d_val();
+ if (val >= strtab_size)
+ this->error(_("DT_NEEDED value out of range: %lld >= %lld"),
+ static_cast<long long>(val),
+ static_cast<long long>(strtab_size));
+ else
+ this->add_needed(strtab + val);
+ }
+ break;
- if (dyn.get_d_tag() == elfcpp::DT_NULL)
- return;
+ default:
+ break;
+ }
}
this->error(_("missing DT_NULL in dynamic segment"));
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);
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->symbols = NULL;
sd->symbols_size = 0;
+ sd->external_symbols_offset = 0;
sd->symbol_names = NULL;
sd->symbol_names_size = 0;
+ 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;
+
+ 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 (dynsym_shndx != -1U)
+ if (this->dynsym_shndx_ != -1U)
{
// Get the dynamic symbols.
- typename This::Shdr dynsymshdr(pshdrs + dynsym_shndx * This::shdr_size);
- gold_assert(dynsymshdr.get_sh_type() == elfcpp::SHT_DYNSYM);
+ typename This::Shdr dynsymshdr(pshdrs
+ + this->dynsym_shndx_ * This::shdr_size);
sd->symbols = this->get_lasting_view(dynsymshdr.get_sh_offset(),
- dynsymshdr.get_sh_size(), false);
- sd->symbols_size = dynsymshdr.get_sh_size();
+ dynsymshdr.get_sh_size(), true,
+ false);
+ sd->symbols_size =
+ 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"),
sd->symbol_names = this->get_lasting_view(strtabshdr.get_sh_offset(),
strtabshdr.get_sh_size(),
- true);
- sd->symbol_names_size = strtabshdr.get_sh_size();
+ false, false);
+ sd->symbol_names_size =
+ convert_to_section_size_type(strtabshdr.get_sh_size());
// Get the version information.
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
}
// Read the SHT_DYNAMIC section to find whether this shared object
- // has a DT_SONAME tag. This doesn't really have anything to do
- // with reading the symbols, but this is a convenient place to do
- // it.
+ // has a DT_SONAME tag and to record any DT_NEEDED tags. This
+ // doesn't really have anything to do with reading the symbols, but
+ // this is a convenient place to do it.
if (dynamic_shndx != -1U)
- this->set_soname(pshdrs, dynamic_shndx, strtab_shndx,
- (sd->symbol_names == NULL
- ? NULL
- : sd->symbol_names->data()),
- sd->symbol_names_size);
+ this->read_dynamic(pshdrs, dynamic_shndx, strtab_shndx,
+ (sd->symbol_names == NULL
+ ? NULL
+ : sd->symbol_names->data()),
+ 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;
return;
const char* names = reinterpret_cast<const char*>(sd->symbol_names->data());
- off_t names_size = sd->symbol_names_size;
+ section_size_type names_size = sd->symbol_names_size;
const unsigned char* pverdef = sd->verdef->data();
- off_t verdef_size = sd->verdef_size;
+ section_size_type verdef_size = sd->verdef_size;
const unsigned int count = sd->verdef_info;
const unsigned char* p = pverdef;
return;
}
- const unsigned int vd_ndx = verdef.get_vd_ndx();
+ const section_size_type vd_ndx = verdef.get_vd_ndx();
// The GNU linker clears the VERSYM_HIDDEN bit. I'm not
// sure why.
// 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();
+ const section_size_type vd_cnt = verdef.get_vd_cnt();
if (vd_cnt < 1)
{
- this->error(_("verdef vd_cnt field too small: %u"), vd_cnt);
+ this->error(_("verdef vd_cnt field too small: %u"),
+ static_cast<unsigned int>(vd_cnt));
return;
}
- const unsigned int vd_aux = verdef.get_vd_aux();
+ const section_size_type vd_aux = verdef.get_vd_aux();
if ((p - pverdef) + vd_aux >= verdef_size)
{
- this->error(_("verdef vd_aux field out of range: %u"), vd_aux);
+ this->error(_("verdef vd_aux field out of range: %u"),
+ static_cast<unsigned int>(vd_aux));
return;
}
const unsigned char* pvda = p + vd_aux;
elfcpp::Verdaux<size, big_endian> verdaux(pvda);
- const unsigned int vda_name = verdaux.get_vda_name();
+ const section_size_type vda_name = verdaux.get_vda_name();
if (vda_name >= names_size)
{
- this->error(_("verdaux vda_name field out of range: %u"), vda_name);
+ this->error(_("verdaux vda_name field out of range: %u"),
+ static_cast<unsigned int>(vda_name));
return;
}
this->set_version_map(version_map, vd_ndx, names + vda_name);
- const unsigned int vd_next = verdef.get_vd_next();
+ const section_size_type vd_next = verdef.get_vd_next();
if ((p - pverdef) + vd_next >= verdef_size)
{
- this->error(_("verdef vd_next field out of range: %u"), vd_next);
+ this->error(_("verdef vd_next field out of range: %u"),
+ static_cast<unsigned int>(vd_next));
return;
}
return;
const char* names = reinterpret_cast<const char*>(sd->symbol_names->data());
- off_t names_size = sd->symbol_names_size;
+ section_size_type names_size = sd->symbol_names_size;
const unsigned char* pverneed = sd->verneed->data();
- const off_t verneed_size = sd->verneed_size;
+ const section_size_type verneed_size = sd->verneed_size;
const unsigned int count = sd->verneed_info;
const unsigned char* p = pverneed;
return;
}
- const unsigned int vn_aux = verneed.get_vn_aux();
+ const section_size_type vn_aux = verneed.get_vn_aux();
if ((p - pverneed) + vn_aux >= verneed_size)
{
- this->error(_("verneed vn_aux field out of range: %u"), vn_aux);
+ this->error(_("verneed vn_aux field out of range: %u"),
+ static_cast<unsigned int>(vn_aux));
return;
}
if (vna_name >= names_size)
{
this->error(_("vernaux vna_name field out of range: %u"),
- vna_name);
+ static_cast<unsigned int>(vna_name));
return;
}
this->set_version_map(version_map, vernaux.get_vna_other(),
names + vna_name);
- const unsigned int vna_next = vernaux.get_vna_next();
+ const section_size_type vna_next = vernaux.get_vna_next();
if ((pvna - pverneed) + vna_next >= verneed_size)
{
this->error(_("verneed vna_next field out of range: %u"),
- vna_next);
+ static_cast<unsigned int>(vna_next));
return;
}
pvna += vna_next;
}
- const unsigned int vn_next = verneed.get_vn_next();
+ const section_size_type vn_next = verneed.get_vn_next();
if ((p - pverneed) + vn_next >= verneed_size)
{
- this->error(_("verneed vn_next field out of range: %u"), vn_next);
+ this->error(_("verneed vn_next field out of range: %u"),
+ static_cast<unsigned int>(vn_next));
return;
}
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)
{
const int sym_size = This::sym_size;
const size_t symcount = sd->symbols_size / sym_size;
- if (static_cast<off_t>(symcount * sym_size) != sd->symbols_size)
+ gold_assert(sd->external_symbols_offset == 0);
+ if (symcount * sym_size != sd->symbols_size)
{
this->error(_("size of dynamic symbols is not multiple of symbol size"));
return;
Version_map version_map;
this->make_version_map(sd, &version_map);
+ // 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->incremental())
+ {
+ 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;
delete sd->verneed;
sd->verneed = NULL;
}
+
+ // This is normally the last time we will read any data from this
+ // file.
+ this->clear_view_cache_marks();
+}
+
+template<int size, bool big_endian>
+Archive::Should_include
+Sized_dynobj<size, big_endian>::do_should_include_member(Symbol_table*,
+ Layout*,
+ Read_symbols_data*,
+ std::string*)
+{
+ 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>
+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)->has_dynsym_index())
+ ++count;
+ *used = count;
}
// Given a vector of hash codes, compute the number of hash buckets to
// based on the number of symbols there are. If there are fewer
// than 3 symbols we use 1 bucket, fewer than 17 symbols we use 3
// buckets, fewer than 37 we use 17 buckets, and so forth. We never
- // use more than 32771 buckets. This is straight from the old GNU
+ // use more than 262147 buckets. This is straight from the old GNU
// linker.
static const unsigned int buckets[] =
{
1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
- 16411, 32771
+ 16411, 32771, 65537, 131101, 262147
};
const int buckets_count = sizeof buckets / sizeof buckets[0];
unsigned int symcount = hashcodes.size();
unsigned int ret = 1;
+ const double full_fraction
+ = 1.0 - parameters->options().hash_bucket_empty_fraction();
for (int i = 0; i < buckets_count; ++i)
{
- if (symcount < buckets[i])
+ if (symcount < buckets[i] * full_fraction)
break;
ret = buckets[i];
}
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->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();
+ 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();
+#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);
{
Symbol* sym = dynsyms[i];
- // FIXME: Should put on unhashed_dynsyms if the symbol is
- // hidden.
- if (sym->is_undefined())
+ if (!sym->needs_dynsym_value()
+ && (sym->is_undefined()
+ || sym->is_from_dynobj()
+ || sym->is_forced_local()))
unhashed_dynsyms.push_back(sym);
else
{
// For the actual data generation we call out to a templatized
// function.
- int size = parameters->get_size();
- bool big_endian = parameters->is_big_endian();
+ int size = parameters->target().get_size();
+ bool big_endian = parameters->target().is_big_endian();
if (size == 32)
{
if (big_endian)
template<int size, bool big_endian>
unsigned char*
-Verdef::write(const Stringpool* dynpool, bool is_last, unsigned char* pb
- ACCEPT_SIZE_ENDIAN) const
+Verdef::write(const Stringpool* dynpool, bool is_last, unsigned char* pb) 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));
+ | (this->is_weak_ ? elfcpp::VER_FLG_WEAK : 0)
+ | (this->is_info_ ? elfcpp::VER_FLG_INFO : 0));
vd.set_vd_ndx(this->index());
vd.set_vd_cnt(1 + this->deps_.size());
vd.set_vd_hash(Dynobj::elf_hash(this->name()));
template<int size, bool big_endian>
unsigned char*
Verneed::write(const Stringpool* dynpool, bool is_last,
- unsigned char* pb ACCEPT_SIZE_ENDIAN) const
+ unsigned char* pb) const
{
const int verneed_size = elfcpp::Elf_sizes<size>::verneed_size;
const int vernaux_size = elfcpp::Elf_sizes<size>::vernaux_size;
// Versions methods.
+Versions::Versions(const Version_script_info& version_script,
+ Stringpool* dynpool)
+ : defs_(), needs_(), version_table_(),
+ is_finalized_(false), version_script_(version_script),
+ needs_base_version_(true)
+{
+ 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;
+ const char* version = dynpool->add(versions[k].c_str(),
+ true, &version_key);
+ Verdef* const vd = new Verdef(
+ version,
+ this->version_script_.get_dependencies(version),
+ false, false, false, false);
+ this->defs_.push_back(vd);
+ Key key(version_key, 0);
+ this->version_table_.insert(std::make_pair(key, vd));
+ }
+ }
+}
+
Versions::~Versions()
{
for (Defs::iterator p = this->defs_.begin();
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, false, true);
+ this->defs_.push_back(vdbase);
+ this->needs_base_version_ = false;
+}
+
+// Return the dynamic object which a symbol refers to.
+
+Dynobj*
+Versions::get_dynobj_for_sym(const Symbol_table* symtab,
+ const Symbol* sym) const
+{
+ if (sym->is_copied_from_dynobj())
+ return symtab->get_copy_source(sym);
+ else
+ {
+ Object* object = sym->object();
+ gold_assert(object->is_dynamic());
+ return static_cast<Dynobj*>(object);
+ }
+}
+
// Record version information for a symbol going into the dynamic
// symbol table.
void
-Versions::record_version(const General_options* options,
+Versions::record_version(const Symbol_table* symtab,
Stringpool* dynpool, const Symbol* sym)
{
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())
+ if (!sym->is_from_dynobj() && !sym->is_copied_from_dynobj())
{
- if (parameters->output_is_shared())
- this->add_def(options, sym, version, version_key);
+ this->add_def(dynpool, 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);
-
+ Dynobj* dynobj = this->get_dynobj_for_sym(symtab, sym);
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)
+Versions::add_def(Stringpool* dynpool, const Symbol* sym, const char* version,
+ Stringpool::Key version_key)
{
Key k(version_key, 0);
Version_base* const vbnull = NULL;
// We have now seen a symbol in this version, so it is not
// weak.
+ gold_assert(vb != NULL);
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())
- {
- gold_error(_("symbol %s has undefined version %s"),
- sym->name(), version);
- return;
- }
-
- // 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);
+ if (parameters->options().shared())
+ gold_error(_("symbol %s has undefined version %s"),
+ sym->demangled_name().c_str(), version);
// When creating a regular executable, automatically define
// a new version.
- Verdef* vd = new Verdef(version, false, false, false);
+ 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);
ins.first->second = vd;
}
if (vn == NULL)
{
+ // Create base version definition lazily for shared library.
+ if (parameters->options().shared() && this->needs_base_version_)
+ this->define_base_version(dynpool);
+
// We have a new filename.
vn = new Verneed(filename);
this->needs_.push_back(vn);
// each new version definition.
unsigned int
-Versions::finalize(const Target* target, Symbol_table* symtab,
- unsigned int dynsym_index, std::vector<Symbol*>* syms)
+Versions::finalize(Symbol_table* symtab, unsigned int dynsym_index,
+ std::vector<Symbol*>* syms)
{
gold_assert(!this->is_finalized_);
// Create a version symbol if necessary.
if (!(*p)->is_symbol_created())
{
- Symbol* vsym = symtab->define_as_constant(target, (*p)->name(),
- (*p)->name(), 0, 0,
+ Symbol* vsym = symtab->define_as_constant((*p)->name(),
+ (*p)->name(),
+ Symbol_table::PREDEFINED,
+ 0, 0,
elfcpp::STT_OBJECT,
elfcpp::STB_GLOBAL,
elfcpp::STV_DEFAULT, 0,
- false);
+ false, false);
vsym->set_needs_dynsym_entry();
vsym->set_dynsym_index(dynsym_index);
+ vsym->set_is_default();
++dynsym_index;
syms->push_back(vsym);
// The name is already in the dynamic pool.
// pointers.
unsigned int
-Versions::version_index(const Stringpool* dynpool, const Symbol* sym) const
+Versions::version_index(const Symbol_table* symtab, 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 (!sym->is_from_dynobj() && !sym->is_copied_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);
+ Dynobj* dynobj = this->get_dynobj_for_sym(symtab, sym);
Stringpool::Key filename_key;
const char* filename = dynpool->find(dynobj->soname(), &filename_key);
template<int size, bool big_endian>
void
-Versions::symbol_section_contents(const Stringpool* dynpool,
+Versions::symbol_section_contents(const Symbol_table* symtab,
+ const Stringpool* dynpool,
unsigned int local_symcount,
const std::vector<Symbol*>& syms,
unsigned char** pp,
- unsigned int* psize
- ACCEPT_SIZE_ENDIAN) const
+ unsigned int* psize) const
{
gold_assert(this->is_finalized_);
unsigned int version_index;
const char* version = (*p)->version();
if (version == NULL)
- version_index = elfcpp::VER_NDX_GLOBAL;
+ {
+ 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(dynpool, *p);
+ 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_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);
+ version_index);
}
*pp = pbuf;
void
Versions::def_section_contents(const Stringpool* dynpool,
unsigned char** pp, unsigned int* psize,
- unsigned int* pentries
- ACCEPT_SIZE_ENDIAN) const
+ unsigned int* pentries) const
{
gold_assert(this->is_finalized_);
gold_assert(!this->defs_.empty());
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));
+ pb = (*p)->write<size, big_endian>(dynpool,
+ i + 1 >= this->defs_.size(),
+ pb);
gold_assert(static_cast<unsigned int>(pb - pbuf) == sz);
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
+ unsigned char** pp, unsigned int* psize,
+ unsigned int* pentries) const
{
gold_assert(this->is_finalized_);
gold_assert(!this->needs_.empty());
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));
+ pb = (*p)->write<size, big_endian>(dynpool,
+ i + 1 >= this->needs_.size(),
+ pb);
gold_assert(static_cast<unsigned int>(pb - pbuf) == sz);
template
void
Versions::symbol_section_contents<32, false>(
+ const Symbol_table*,
const Stringpool*,
unsigned int,
const std::vector<Symbol*>&,
unsigned char**,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_32_BIG
template
void
Versions::symbol_section_contents<32, true>(
+ const Symbol_table*,
const Stringpool*,
unsigned int,
const std::vector<Symbol*>&,
unsigned char**,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_LITTLE
template
void
Versions::symbol_section_contents<64, false>(
+ const Symbol_table*,
const Stringpool*,
unsigned int,
const std::vector<Symbol*>&,
unsigned char**,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_BIG
template
void
Versions::symbol_section_contents<64, true>(
+ const Symbol_table*,
const Stringpool*,
unsigned int,
const std::vector<Symbol*>&,
unsigned char**,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_32_LITTLE
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_32_BIG
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_LITTLE
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_BIG
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_32_LITTLE
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_32_BIG
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(32, true)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_LITTLE
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, false)) const;
+ unsigned int*) const;
#endif
#ifdef HAVE_TARGET_64_BIG
const Stringpool*,
unsigned char**,
unsigned int*,
- unsigned int*
- ACCEPT_SIZE_ENDIAN_EXPLICIT(64, true)) const;
+ unsigned int*) const;
#endif
} // End namespace gold.
projects / deliverable / binutils-gdb.git / blobdiff