// object.cc -- support for an object file for linking in gold
-// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
#include "demangle.h"
#include "libiberty.h"
+#include "gc.h"
#include "target-select.h"
#include "dwarf_reader.h"
#include "layout.h"
#include "output.h"
#include "symtab.h"
+#include "cref.h"
#include "reloc.h"
#include "object.h"
#include "dynobj.h"
+#include "plugin.h"
namespace gold
{
+// Class Xindex.
+
+// Initialize the symtab_xindex_ array. Find the SHT_SYMTAB_SHNDX
+// section and read it in. SYMTAB_SHNDX is the index of the symbol
+// table we care about.
+
+template<int size, bool big_endian>
+void
+Xindex::initialize_symtab_xindex(Object* object, unsigned int symtab_shndx)
+{
+ if (!this->symtab_xindex_.empty())
+ return;
+
+ gold_assert(symtab_shndx != 0);
+
+ // Look through the sections in reverse order, on the theory that it
+ // is more likely to be near the end than the beginning.
+ unsigned int i = object->shnum();
+ while (i > 0)
+ {
+ --i;
+ if (object->section_type(i) == elfcpp::SHT_SYMTAB_SHNDX
+ && this->adjust_shndx(object->section_link(i)) == symtab_shndx)
+ {
+ this->read_symtab_xindex<size, big_endian>(object, i, NULL);
+ return;
+ }
+ }
+
+ object->error(_("missing SHT_SYMTAB_SHNDX section"));
+}
+
+// Read in the symtab_xindex_ array, given the section index of the
+// SHT_SYMTAB_SHNDX section. If PSHDRS is not NULL, it points at the
+// section headers.
+
+template<int size, bool big_endian>
+void
+Xindex::read_symtab_xindex(Object* object, unsigned int xindex_shndx,
+ const unsigned char* pshdrs)
+{
+ section_size_type bytecount;
+ const unsigned char* contents;
+ if (pshdrs == NULL)
+ contents = object->section_contents(xindex_shndx, &bytecount, false);
+ else
+ {
+ const unsigned char* p = (pshdrs
+ + (xindex_shndx
+ * elfcpp::Elf_sizes<size>::shdr_size));
+ typename elfcpp::Shdr<size, big_endian> shdr(p);
+ bytecount = convert_to_section_size_type(shdr.get_sh_size());
+ contents = object->get_view(shdr.get_sh_offset(), bytecount, true, false);
+ }
+
+ gold_assert(this->symtab_xindex_.empty());
+ this->symtab_xindex_.reserve(bytecount / 4);
+ for (section_size_type i = 0; i < bytecount; i += 4)
+ {
+ unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(contents + i);
+ // We preadjust the section indexes we save.
+ this->symtab_xindex_.push_back(this->adjust_shndx(shndx));
+ }
+}
+
+// Symbol symndx has a section of SHN_XINDEX; return the real section
+// index.
+
+unsigned int
+Xindex::sym_xindex_to_shndx(Object* object, unsigned int symndx)
+{
+ if (symndx >= this->symtab_xindex_.size())
+ {
+ object->error(_("symbol %u out of range for SHT_SYMTAB_SHNDX section"),
+ symndx);
+ return elfcpp::SHN_UNDEF;
+ }
+ unsigned int shndx = this->symtab_xindex_[symndx];
+ if (shndx < elfcpp::SHN_LORESERVE || shndx >= object->shnum())
+ {
+ object->error(_("extended index for symbol %u out of range: %u"),
+ symndx, shndx);
+ return elfcpp::SHN_UNDEF;
+ }
+ return shndx;
+}
+
// Class Object.
// Set the target based on fields in the ELF file header.
{
Location loc(this->do_section_contents(shndx));
*plen = convert_to_section_size_type(loc.data_size);
- return this->get_view(loc.file_offset, *plen, cache);
+ return this->get_view(loc.file_offset, *plen, true, cache);
}
// Read the section data into SD. This is code common to Sized_relobj
// Read the section headers.
const off_t shoff = elf_file->shoff();
const unsigned int shnum = this->shnum();
- sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size, true);
+ sd->section_headers = this->get_lasting_view(shoff, shnum * shdr_size,
+ true, true);
// Read the section names.
const unsigned char* pshdrs = sd->section_headers->data();
sd->section_names_size =
convert_to_section_size_type(shdrnames.get_sh_size());
sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(),
- sd->section_names_size, false);
+ sd->section_names_size, false,
+ false);
}
// If NAME is the name of a special .gnu.warning section, arrange for
return false;
}
+// Class Relobj
+
+// To copy the symbols data read from the file to a local data structure.
+// This function is called from do_layout only while doing garbage
+// collection.
+
+void
+Relobj::copy_symbols_data(Symbols_data* gc_sd, Read_symbols_data* sd,
+ unsigned int section_header_size)
+{
+ gc_sd->section_headers_data =
+ new unsigned char[(section_header_size)];
+ memcpy(gc_sd->section_headers_data, sd->section_headers->data(),
+ section_header_size);
+ gc_sd->section_names_data =
+ new unsigned char[sd->section_names_size];
+ memcpy(gc_sd->section_names_data, sd->section_names->data(),
+ sd->section_names_size);
+ gc_sd->section_names_size = sd->section_names_size;
+ if (sd->symbols != NULL)
+ {
+ gc_sd->symbols_data =
+ new unsigned char[sd->symbols_size];
+ memcpy(gc_sd->symbols_data, sd->symbols->data(),
+ sd->symbols_size);
+ }
+ else
+ {
+ gc_sd->symbols_data = NULL;
+ }
+ gc_sd->symbols_size = sd->symbols_size;
+ gc_sd->external_symbols_offset = sd->external_symbols_offset;
+ if (sd->symbol_names != NULL)
+ {
+ gc_sd->symbol_names_data =
+ new unsigned char[sd->symbol_names_size];
+ memcpy(gc_sd->symbol_names_data, sd->symbol_names->data(),
+ sd->symbol_names_size);
+ }
+ else
+ {
+ gc_sd->symbol_names_data = NULL;
+ }
+ gc_sd->symbol_names_size = sd->symbol_names_size;
+}
+
+// This function determines if a particular section name must be included
+// in the link. This is used during garbage collection to determine the
+// roots of the worklist.
+
+bool
+Relobj::is_section_name_included(const char* name)
+{
+ if (is_prefix_of(".ctors", name)
+ || is_prefix_of(".dtors", name)
+ || is_prefix_of(".note", name)
+ || is_prefix_of(".init", name)
+ || is_prefix_of(".fini", name)
+ || is_prefix_of(".gcc_except_table", name)
+ || is_prefix_of(".jcr", name)
+ || is_prefix_of(".preinit_array", name)
+ || (is_prefix_of(".text", name)
+ && strstr(name, "personality"))
+ || (is_prefix_of(".data", name)
+ && strstr(name, "personality"))
+ || (is_prefix_of(".gnu.linkonce.d", name) &&
+ strstr(name, "personality")))
+ {
+ return true;
+ }
+ return false;
+}
+
// Class Sized_relobj.
template<int size, bool big_endian>
output_local_symbol_count_(0),
output_local_dynsym_count_(0),
symbols_(),
+ defined_count_(0),
local_symbol_offset_(0),
local_dynsym_offset_(0),
local_values_(),
local_got_offsets_(),
+ kept_comdat_sections_(),
has_eh_frame_(false)
{
}
// to put the symbol table at the end.
const unsigned char* p = pshdrs + shnum * This::shdr_size;
unsigned int i = shnum;
+ unsigned int xindex_shndx = 0;
+ unsigned int xindex_link = 0;
while (i > 0)
{
--i;
if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB)
{
this->symtab_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);
+ }
break;
}
+
+ // Try to pick up the SHT_SYMTAB_SHNDX section, if there is
+ // one. This will work if it follows the SHT_SYMTAB
+ // section.
+ if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB_SHNDX)
+ {
+ xindex_shndx = i;
+ xindex_link = this->adjust_shndx(shdr.get_sh_link());
+ }
}
}
}
+// Return the Xindex structure to use for object with lots of
+// sections.
+
+template<int size, bool big_endian>
+Xindex*
+Sized_relobj<size, big_endian>::do_initialize_xindex()
+{
+ gold_assert(this->symtab_shndx_ != -1U);
+ Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset());
+ xindex->initialize_symtab_xindex<size, big_endian>(this, this->symtab_shndx_);
+ return xindex;
+}
+
// Return whether SHDR has the right type and flags to be a GNU
// .eh_frame section.
Sized_relobj<size, big_endian>::check_eh_frame_flags(
const elfcpp::Shdr<size, big_endian>* shdr) const
{
- return (shdr->get_sh_size() > 0
- && shdr->get_sh_type() == elfcpp::SHT_PROGBITS
+ return (shdr->get_sh_type() == elfcpp::SHT_PROGBITS
&& (shdr->get_sh_flags() & elfcpp::SHF_ALLOC) != 0);
}
off_t readoff = this->has_eh_frame_ ? dataoff : extoff;
section_size_type readsize = this->has_eh_frame_ ? datasize : extsize;
- File_view* fvsymtab = this->get_lasting_view(readoff, readsize, false);
+ if (readsize == 0)
+ {
+ // No external symbols. Also weird but also legal.
+ return;
+ }
+
+ File_view* fvsymtab = this->get_lasting_view(readoff, readsize, true, false);
// Read the section header for the symbol names.
- unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ unsigned int strtab_shndx = this->adjust_shndx(symtabshdr.get_sh_link());
if (strtab_shndx >= this->shnum())
{
this->error(_("invalid symbol table name index: %u"), strtab_shndx);
// Read the symbol names.
File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(),
- strtabshdr.get_sh_size(), true);
+ strtabshdr.get_sh_size(),
+ false, true);
sd->symbols = fvsymtab;
sd->symbols_size = readsize;
}
// Return the section index of symbol SYM. Set *VALUE to its value in
-// the object file. Note that for a symbol which is not defined in
-// this object file, this will set *VALUE to 0 and return SHN_UNDEF;
-// it will not return the final value of the symbol in the link.
+// the object file. Set *IS_ORDINARY if this is an ordinary section
+// index. not a special cod between SHN_LORESERVE and SHN_HIRESERVE.
+// Note that for a symbol which is not defined in this object file,
+// this will set *VALUE to 0 and return SHN_UNDEF; it will not return
+// the final value of the symbol in the link.
template<int size, bool big_endian>
unsigned int
Sized_relobj<size, big_endian>::symbol_section_and_value(unsigned int sym,
- Address* value)
+ Address* value,
+ bool* is_ordinary)
{
section_size_type symbols_size;
const unsigned char* symbols = this->section_contents(this->symtab_shndx_,
elfcpp::Sym<size, big_endian> elfsym(symbols + sym * This::sym_size);
*value = elfsym.get_st_value();
- // FIXME: Handle SHN_XINDEX.
- return elfsym.get_st_shndx();
+
+ return this->adjust_sym_shndx(sym, elfsym.get_st_shndx(), is_ordinary);
}
// Return whether to include a section group in the link. LAYOUT is
Layout* layout,
unsigned int index,
const char* name,
- const elfcpp::Shdr<size, big_endian>& shdr,
+ const unsigned char* shdrs,
+ const char* section_names,
+ section_size_type section_names_size,
std::vector<bool>* omit)
{
// Read the section contents.
+ typename This::Shdr shdr(shdrs + index * This::shdr_size);
const unsigned char* pcon = this->get_view(shdr.get_sh_offset(),
- shdr.get_sh_size(), false);
+ shdr.get_sh_size(), true, false);
const elfcpp::Elf_Word* pword =
reinterpret_cast<const elfcpp::Elf_Word*>(pcon);
// Get the appropriate symbol table header (this will normally be
// the single SHT_SYMTAB section, but in principle it need not be).
- const unsigned int link = shdr.get_sh_link();
+ const unsigned int link = this->adjust_shndx(shdr.get_sh_link());
typename This::Shdr symshdr(this, this->elf_file_.section_header(link));
// Read the symbol table entry.
- if (shdr.get_sh_info() >= symshdr.get_sh_size() / This::sym_size)
+ unsigned int symndx = shdr.get_sh_info();
+ if (symndx >= symshdr.get_sh_size() / This::sym_size)
{
this->error(_("section group %u info %u out of range"),
- index, shdr.get_sh_info());
+ index, symndx);
return false;
}
- off_t symoff = symshdr.get_sh_offset() + shdr.get_sh_info() * This::sym_size;
- const unsigned char* psym = this->get_view(symoff, This::sym_size, false);
+ off_t symoff = symshdr.get_sh_offset() + symndx * This::sym_size;
+ const unsigned char* psym = this->get_view(symoff, This::sym_size, true,
+ false);
elfcpp::Sym<size, big_endian> sym(psym);
// Read the symbol table names.
section_size_type symnamelen;
const unsigned char* psymnamesu;
- psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen,
- true);
+ psymnamesu = this->section_contents(this->adjust_shndx(symshdr.get_sh_link()),
+ &symnamelen, true);
const char* psymnames = reinterpret_cast<const char*>(psymnamesu);
// Get the section group signature.
if (sym.get_st_name() >= symnamelen)
{
this->error(_("symbol %u name offset %u out of range"),
- shdr.get_sh_info(), sym.get_st_name());
+ symndx, sym.get_st_name());
return false;
}
- const char* signature = psymnames + sym.get_st_name();
+ std::string signature(psymnames + sym.get_st_name());
// It seems that some versions of gas will create a section group
// associated with a section symbol, and then fail to give a name to
// the section symbol. In such a case, use the name of the section.
- // FIXME.
- std::string secname;
if (signature[0] == '\0' && sym.get_st_type() == elfcpp::STT_SECTION)
{
- secname = this->section_name(sym.get_st_shndx());
- signature = secname.c_str();
+ bool is_ordinary;
+ unsigned int sym_shndx = this->adjust_sym_shndx(symndx,
+ sym.get_st_shndx(),
+ &is_ordinary);
+ if (!is_ordinary || sym_shndx >= this->shnum())
+ {
+ this->error(_("symbol %u invalid section index %u"),
+ symndx, sym_shndx);
+ return false;
+ }
+ typename This::Shdr member_shdr(shdrs + sym_shndx * This::shdr_size);
+ if (member_shdr.get_sh_name() < section_names_size)
+ signature = section_names + member_shdr.get_sh_name();
}
- // Record this section group, and see whether we've already seen one
- // with the same signature.
+ // Record this section group in the layout, and see whether we've already
+ // seen one with the same signature.
+ bool include_group;
+ Sized_relobj<size, big_endian>* kept_object = NULL;
+ Kept_section::Comdat_group* kept_group = NULL;
- if ((flags & elfcpp::GRP_COMDAT) == 0
- || layout->add_comdat(signature, true))
+ if ((flags & elfcpp::GRP_COMDAT) == 0)
+ include_group = true;
+ else
{
- if (parameters->options().relocatable())
- layout->layout_group(symtab, this, index, name, signature, shdr,
- pword);
- return true;
+ Kept_section this_group(this, index, true);
+ Kept_section *kept_section_group;
+ include_group = layout->find_or_add_kept_section(signature,
+ &this_group,
+ &kept_section_group);
+ if (include_group)
+ kept_section_group->group_sections = new Kept_section::Comdat_group;
+
+ kept_group = kept_section_group->group_sections;
+ kept_object = (static_cast<Sized_relobj<size, big_endian>*>
+ (kept_section_group->object));
}
- // This is a duplicate. We want to discard the sections in this
- // group.
size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word);
+
+ std::vector<unsigned int> shndxes;
+ bool relocate_group = include_group && parameters->options().relocatable();
+ if (relocate_group)
+ shndxes.reserve(count - 1);
+
for (size_t i = 1; i < count; ++i)
{
elfcpp::Elf_Word secnum =
- elfcpp::Swap<32, big_endian>::readval(pword + i);
+ this->adjust_shndx(elfcpp::Swap<32, big_endian>::readval(pword + i));
+
+ if (relocate_group)
+ shndxes.push_back(secnum);
+
if (secnum >= this->shnum())
{
this->error(_("section %u in section group %u out of range"),
secnum, index);
continue;
}
- (*omit)[secnum] = true;
+
+ // Check for an earlier section number, since we're going to get
+ // it wrong--we may have already decided to include the section.
+ if (secnum < index)
+ this->error(_("invalid section group %u refers to earlier section %u"),
+ index, secnum);
+
+ // Get the name of the member section.
+ typename This::Shdr member_shdr(shdrs + secnum * This::shdr_size);
+ if (member_shdr.get_sh_name() >= section_names_size)
+ {
+ // This is an error, but it will be diagnosed eventually
+ // in do_layout, so we don't need to do anything here but
+ // ignore it.
+ continue;
+ }
+ std::string mname(section_names + member_shdr.get_sh_name());
+
+ if (!include_group)
+ {
+ (*omit)[secnum] = true;
+ if (kept_group != NULL)
+ {
+ // Find the corresponding kept section, and store that info
+ // in the discarded section table.
+ Kept_section::Comdat_group::const_iterator p =
+ kept_group->find(mname);
+ if (p != kept_group->end())
+ {
+ Kept_comdat_section* kept =
+ new Kept_comdat_section(kept_object, p->second);
+ this->set_kept_comdat_section(secnum, kept);
+ }
+ }
+ }
+ else if (flags & elfcpp::GRP_COMDAT)
+ {
+ // Add the section to the kept group table.
+ gold_assert(kept_group != NULL);
+ kept_group->insert(std::make_pair(mname, secnum));
+ }
}
- return false;
+ if (relocate_group)
+ layout->layout_group(symtab, this, index, name, signature.c_str(),
+ shdr, flags, &shndxes);
+
+ return include_group;
}
// Whether to include a linkonce section in the link. NAME is the
bool
Sized_relobj<size, big_endian>::include_linkonce_section(
Layout* layout,
+ unsigned int index,
const char* name,
const elfcpp::Shdr<size, big_endian>&)
{
symname = name + strlen(linkonce_t);
else
symname = strrchr(name, '.') + 1;
- bool include1 = layout->add_comdat(symname, false);
- bool include2 = layout->add_comdat(name, true);
+ std::string sig1(symname);
+ std::string sig2(name);
+ Kept_section candidate1(this, index, false);
+ Kept_section candidate2(this, index, true);
+ Kept_section* kept1;
+ Kept_section* kept2;
+ bool include1 = layout->find_or_add_kept_section(sig1, &candidate1, &kept1);
+ bool include2 = layout->find_or_add_kept_section(sig2, &candidate2, &kept2);
+
+ if (!include2)
+ {
+ // The section is being discarded on the basis of its section
+ // name (i.e., the kept section was also a linkonce section).
+ // In this case, the section index stored with the layout object
+ // is the linkonce section that was kept.
+ unsigned int kept_group_index = kept2->shndx;
+ Relobj* kept_relobj = kept2->object;
+ if (kept_relobj != NULL)
+ {
+ Sized_relobj<size, big_endian>* kept_object =
+ static_cast<Sized_relobj<size, big_endian>*>(kept_relobj);
+ Kept_comdat_section* kept =
+ new Kept_comdat_section(kept_object, kept_group_index);
+ this->set_kept_comdat_section(index, kept);
+ }
+ }
+ else if (!include1)
+ {
+ // The section is being discarded on the basis of its symbol
+ // name. This means that the corresponding kept section was
+ // part of a comdat group, and it will be difficult to identify
+ // the specific section within that group that corresponds to
+ // this linkonce section. We'll handle the simple case where
+ // the group has only one member section. Otherwise, it's not
+ // worth the effort.
+ Relobj* kept_relobj = kept1->object;
+ if (kept_relobj != NULL)
+ {
+ Sized_relobj<size, big_endian>* kept_object =
+ static_cast<Sized_relobj<size, big_endian>*>(kept_relobj);
+ Kept_section::Comdat_group* kept_group = kept1->group_sections;
+ if (kept_group != NULL && kept_group->size() == 1)
+ {
+ Kept_section::Comdat_group::const_iterator p =
+ kept_group->begin();
+ gold_assert(p != kept_group->end());
+ Kept_comdat_section* kept =
+ new Kept_comdat_section(kept_object, p->second);
+ this->set_kept_comdat_section(index, kept);
+ }
+ }
+ }
+
return include1 && include2;
}
+// Layout an input section.
+
+template<int size, bool big_endian>
+inline void
+Sized_relobj<size, big_endian>::layout_section(Layout* layout,
+ unsigned int shndx,
+ const char* name,
+ typename This::Shdr& shdr,
+ unsigned int reloc_shndx,
+ unsigned int reloc_type)
+{
+ off_t offset;
+ Output_section* os = layout->layout(this, shndx, name, shdr,
+ reloc_shndx, reloc_type, &offset);
+
+ this->output_sections()[shndx] = os;
+ if (offset == -1)
+ this->section_offsets_[shndx] = invalid_address;
+ else
+ this->section_offsets_[shndx] = convert_types<Address, off_t>(offset);
+
+ // If this section requires special handling, and if there are
+ // relocs that apply to it, then we must do the special handling
+ // before we apply the relocs.
+ if (offset == -1 && reloc_shndx != 0)
+ this->set_relocs_must_follow_section_writes();
+}
+
// Lay out the input sections. We walk through the sections and check
// whether they should be included in the link. If they should, we
// pass them to the Layout object, which will return an output section
-// and an offset.
+// and an offset.
+// During garbage collection (gc-sections), this function is called
+// twice. When it is called the first time, it is for setting up some
+// sections as roots to a work-list and to do comdat processing. Actual
+// layout happens the second time around after all the relevant sections
+// have been determined. The first time, is_worklist_ready is false.
+// It is then set to true after the worklist is processed and the relevant
+// sections are determined. Then, this function is called again to
+// layout the sections.
template<int size, bool big_endian>
void
Read_symbols_data* sd)
{
const unsigned int shnum = this->shnum();
+ bool is_gc_pass_one = (parameters->options().gc_sections()
+ && !symtab->gc()->is_worklist_ready());
+ bool is_gc_pass_two = (parameters->options().gc_sections()
+ && symtab->gc()->is_worklist_ready());
if (shnum == 0)
return;
+ Symbols_data* gc_sd = NULL;
+ if (is_gc_pass_one)
+ {
+ // During garbage collection save the symbols data to use it when
+ // re-entering this function.
+ gc_sd = new Symbols_data;
+ this->copy_symbols_data(gc_sd, sd, This::shdr_size * shnum);
+ this->set_symbols_data(gc_sd);
+ }
+ else if (is_gc_pass_two)
+ {
+ gc_sd = this->get_symbols_data();
+ }
+
+ const unsigned char* section_headers_data = NULL;
+ section_size_type section_names_size;
+ const unsigned char* symbols_data = NULL;
+ section_size_type symbols_size;
+ section_offset_type external_symbols_offset;
+ const unsigned char* symbol_names_data = NULL;
+ section_size_type symbol_names_size;
+
+ if (parameters->options().gc_sections())
+ {
+ section_headers_data = gc_sd->section_headers_data;
+ section_names_size = gc_sd->section_names_size;
+ symbols_data = gc_sd->symbols_data;
+ symbols_size = gc_sd->symbols_size;
+ external_symbols_offset = gc_sd->external_symbols_offset;
+ symbol_names_data = gc_sd->symbol_names_data;
+ symbol_names_size = gc_sd->symbol_names_size;
+ }
+ else
+ {
+ section_headers_data = sd->section_headers->data();
+ section_names_size = sd->section_names_size;
+ if (sd->symbols != NULL)
+ symbols_data = sd->symbols->data();
+ symbols_size = sd->symbols_size;
+ external_symbols_offset = sd->external_symbols_offset;
+ if (sd->symbol_names != NULL)
+ symbol_names_data = sd->symbol_names->data();
+ symbol_names_size = sd->symbol_names_size;
+ }
// Get the section headers.
- const unsigned char* pshdrs = sd->section_headers->data();
+ const unsigned char* shdrs = section_headers_data;
+ const unsigned char* pshdrs;
// Get the section names.
- const unsigned char* pnamesu = sd->section_names->data();
+ const unsigned char* pnamesu = parameters->options().gc_sections() ?
+ gc_sd->section_names_data :
+ sd->section_names->data();
const char* pnames = reinterpret_cast<const char*>(pnamesu);
+ // If any input files have been claimed by plugins, we need to defer
+ // actual layout until the replacement files have arrived.
+ const bool should_defer_layout =
+ (parameters->options().has_plugins()
+ && parameters->options().plugins()->should_defer_layout());
+ unsigned int num_sections_to_defer = 0;
+
// For each section, record the index of the reloc section if any.
// Use 0 to mean that there is no reloc section, -1U to mean that
// there is more than one.
std::vector<unsigned int> reloc_shndx(shnum, 0);
std::vector<unsigned int> reloc_type(shnum, elfcpp::SHT_NULL);
// Skip the first, dummy, section.
- pshdrs += This::shdr_size;
+ pshdrs = shdrs + This::shdr_size;
for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size)
{
typename This::Shdr shdr(pshdrs);
+ // Count the number of sections whose layout will be deferred.
+ if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC))
+ ++num_sections_to_defer;
+
unsigned int sh_type = shdr.get_sh_type();
if (sh_type == elfcpp::SHT_REL || sh_type == elfcpp::SHT_RELA)
{
- unsigned int target_shndx = shdr.get_sh_info();
+ unsigned int target_shndx = this->adjust_shndx(shdr.get_sh_info());
if (target_shndx == 0 || target_shndx >= shnum)
{
this->error(_("relocation section %u has bad info %u"),
}
}
- std::vector<Map_to_output>& map_sections(this->map_to_output());
- map_sections.resize(shnum);
+ Output_sections& out_sections(this->output_sections());
+ std::vector<Address>& out_section_offsets(this->section_offsets_);
+
+ if (!is_gc_pass_two)
+ {
+ out_sections.resize(shnum);
+ out_section_offsets.resize(shnum);
+ }
// If we are only linking for symbols, then there is nothing else to
// do here.
if (this->input_file()->just_symbols())
{
- delete sd->section_headers;
- sd->section_headers = NULL;
- delete sd->section_names;
- sd->section_names = NULL;
+ if (!is_gc_pass_two)
+ {
+ delete sd->section_headers;
+ sd->section_headers = NULL;
+ delete sd->section_names;
+ sd->section_names = NULL;
+ }
return;
}
+ if (num_sections_to_defer > 0)
+ {
+ parameters->options().plugins()->add_deferred_layout_object(this);
+ this->deferred_layout_.reserve(num_sections_to_defer);
+ }
+
// Whether we've seen a .note.GNU-stack section.
bool seen_gnu_stack = false;
// The flags of a .note.GNU-stack section.
std::vector<unsigned int> eh_frame_sections;
// Skip the first, dummy, section.
- pshdrs = sd->section_headers->data() + This::shdr_size;
+ pshdrs = shdrs + This::shdr_size;
for (unsigned int i = 1; i < shnum; ++i, pshdrs += This::shdr_size)
{
typename This::Shdr shdr(pshdrs);
- if (shdr.get_sh_name() >= sd->section_names_size)
+ if (shdr.get_sh_name() >= section_names_size)
{
this->error(_("bad section name offset for section %u: %lu"),
i, static_cast<unsigned long>(shdr.get_sh_name()));
const char* name = pnames + shdr.get_sh_name();
- if (this->handle_gnu_warning_section(name, i, symtab))
- {
- if (!relocatable)
- omit[i] = true;
- }
+ if (!is_gc_pass_two)
+ {
+ if (this->handle_gnu_warning_section(name, i, symtab))
+ {
+ if (!relocatable)
+ omit[i] = true;
+ }
- // The .note.GNU-stack section is special. It gives the
- // protection flags that this object file requires for the stack
- // in memory.
- if (strcmp(name, ".note.GNU-stack") == 0)
- {
- seen_gnu_stack = true;
- gnu_stack_flags |= shdr.get_sh_flags();
- omit[i] = true;
- }
+ // The .note.GNU-stack section is special. It gives the
+ // protection flags that this object file requires for the stack
+ // in memory.
+ if (strcmp(name, ".note.GNU-stack") == 0)
+ {
+ seen_gnu_stack = true;
+ gnu_stack_flags |= shdr.get_sh_flags();
+ omit[i] = true;
+ }
- bool discard = omit[i];
- if (!discard)
- {
- if (shdr.get_sh_type() == elfcpp::SHT_GROUP)
- {
- if (!this->include_section_group(symtab, layout, i, name, shdr,
- &omit))
- discard = true;
- }
- else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0
- && Layout::is_linkonce(name))
- {
- if (!this->include_linkonce_section(layout, name, shdr))
- discard = true;
+ bool discard = omit[i];
+ if (!discard)
+ {
+ if (shdr.get_sh_type() == elfcpp::SHT_GROUP)
+ {
+ if (!this->include_section_group(symtab, layout, i, name,
+ shdrs, pnames,
+ section_names_size,
+ &omit))
+ discard = true;
+ }
+ else if ((shdr.get_sh_flags() & elfcpp::SHF_GROUP) == 0
+ && Layout::is_linkonce(name))
+ {
+ if (!this->include_linkonce_section(layout, i, name, shdr))
+ discard = true;
+ }
}
- }
- if (discard)
- {
- // Do not include this section in the link.
- map_sections[i].output_section = NULL;
- continue;
- }
+ if (discard)
+ {
+ // Do not include this section in the link.
+ out_sections[i] = NULL;
+ out_section_offsets[i] = invalid_address;
+ continue;
+ }
+ }
+
+ if (is_gc_pass_one)
+ {
+ if (is_section_name_included(name)
+ || shdr.get_sh_type() == elfcpp::SHT_INIT_ARRAY
+ || shdr.get_sh_type() == elfcpp::SHT_FINI_ARRAY)
+ {
+ symtab->gc()->worklist().push(Section_id(this, i));
+ }
+ }
// When doing a relocatable link we are going to copy input
// reloc sections into the output. We only want to copy the
// ones associated with sections which are not being discarded.
// However, we don't know that yet for all sections. So save
- // reloc sections and process them later.
+ // reloc sections and process them later. Garbage collection is
+ // not triggered when relocatable code is desired.
if (emit_relocs
&& (shdr.get_sh_type() == elfcpp::SHT_REL
|| shdr.get_sh_type() == elfcpp::SHT_RELA))
// determine which sections are being discarded, and discard the
// corresponding information.
if (!relocatable
- && strcmp(name, ".eh_frame") == 0
- && this->check_eh_frame_flags(&shdr))
- {
- eh_frame_sections.push_back(i);
- continue;
- }
-
- off_t offset;
- Output_section* os = layout->layout(this, i, name, shdr,
- reloc_shndx[i], reloc_type[i],
- &offset);
-
- map_sections[i].output_section = os;
- map_sections[i].offset = offset;
+ && strcmp(name, ".eh_frame") == 0
+ && this->check_eh_frame_flags(&shdr))
+ {
+ if (is_gc_pass_one)
+ {
+ out_sections[i] = reinterpret_cast<Output_section*>(1);
+ out_section_offsets[i] = invalid_address;
+ }
+ else
+ eh_frame_sections.push_back(i);
+ continue;
+ }
- // If this section requires special handling, and if there are
- // relocs that apply to it, then we must do the special handling
- // before we apply the relocs.
- if (offset == -1 && reloc_shndx[i] != 0)
- this->set_relocs_must_follow_section_writes();
+ if (is_gc_pass_two)
+ {
+ // This is executed during the second pass of garbage
+ // collection. do_layout has been called before and some
+ // sections have been already discarded. Simply ignore
+ // such sections this time around.
+ if (out_sections[i] == NULL)
+ {
+ gold_assert(out_section_offsets[i] == invalid_address);
+ continue;
+ }
+ if ((shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0)
+ if (symtab->gc()->referenced_list().find(Section_id(this,i))
+ == symtab->gc()->referenced_list().end())
+ {
+ if (parameters->options().print_gc_sections())
+ gold_info(_("%s: removing unused section from '%s'"
+ " in file '%s"),
+ program_name, this->section_name(i).c_str(),
+ this->name().c_str());
+ out_sections[i] = NULL;
+ out_section_offsets[i] = invalid_address;
+ continue;
+ }
+ }
+ // Defer layout here if input files are claimed by plugins. When gc
+ // is turned on this function is called twice. For the second call
+ // should_defer_layout should be false.
+ if (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC))
+ {
+ gold_assert(!is_gc_pass_two);
+ this->deferred_layout_.push_back(Deferred_layout(i, name,
+ pshdrs,
+ reloc_shndx[i],
+ reloc_type[i]));
+ // Put dummy values here; real values will be supplied by
+ // do_layout_deferred_sections.
+ out_sections[i] = reinterpret_cast<Output_section*>(2);
+ out_section_offsets[i] = invalid_address;
+ continue;
+ }
+ // During gc_pass_two if a section that was previously deferred is
+ // found, do not layout the section as layout_deferred_sections will
+ // do it later from gold.cc.
+ if (is_gc_pass_two
+ && (out_sections[i] == reinterpret_cast<Output_section*>(2)))
+ continue;
+
+ if (is_gc_pass_one)
+ {
+ // This is during garbage collection. The out_sections are
+ // assigned in the second call to this function.
+ out_sections[i] = reinterpret_cast<Output_section*>(1);
+ out_section_offsets[i] = invalid_address;
+ }
+ else
+ {
+ // When garbage collection is switched on the actual layout
+ // only happens in the second call.
+ this->layout_section(layout, i, name, shdr, reloc_shndx[i],
+ reloc_type[i]);
+ }
}
- layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags);
+ if (!is_gc_pass_one)
+ layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags);
// When doing a relocatable link handle the reloc sections at the
- // end.
+ // end. Garbage collection is not turned on for relocatable code.
if (emit_relocs)
this->size_relocatable_relocs();
+ gold_assert(!parameters->options().gc_sections() || reloc_sections.empty());
for (std::vector<unsigned int>::const_iterator p = reloc_sections.begin();
p != reloc_sections.end();
++p)
{
unsigned int i = *p;
const unsigned char* pshdr;
- pshdr = sd->section_headers->data() + i * This::shdr_size;
+ pshdr = section_headers_data + i * This::shdr_size;
typename This::Shdr shdr(pshdr);
- unsigned int data_shndx = shdr.get_sh_info();
+ unsigned int data_shndx = this->adjust_shndx(shdr.get_sh_info());
if (data_shndx >= shnum)
{
// We already warned about this above.
continue;
}
- Output_section* data_section = map_sections[data_shndx].output_section;
+ Output_section* data_section = out_sections[data_shndx];
if (data_section == NULL)
{
- map_sections[i].output_section = NULL;
+ out_sections[i] = NULL;
+ out_section_offsets[i] = invalid_address;
continue;
}
Output_section* os = layout->layout_reloc(this, i, shdr, data_section,
rr);
- map_sections[i].output_section = os;
- map_sections[i].offset = -1;
+ out_sections[i] = os;
+ out_section_offsets[i] = invalid_address;
}
// Handle the .eh_frame sections at the end.
+ gold_assert(!is_gc_pass_one || eh_frame_sections.empty());
for (std::vector<unsigned int>::const_iterator p = eh_frame_sections.begin();
p != eh_frame_sections.end();
++p)
{
gold_assert(this->has_eh_frame_);
- gold_assert(sd->external_symbols_offset != 0);
+ gold_assert(external_symbols_offset != 0);
unsigned int i = *p;
const unsigned char *pshdr;
- pshdr = sd->section_headers->data() + i * This::shdr_size;
+ pshdr = section_headers_data + i * This::shdr_size;
typename This::Shdr shdr(pshdr);
off_t offset;
Output_section* os = layout->layout_eh_frame(this,
- sd->symbols->data(),
- sd->symbols_size,
- sd->symbol_names->data(),
- sd->symbol_names_size,
+ symbols_data,
+ symbols_size,
+ symbol_names_data,
+ symbol_names_size,
i, shdr,
reloc_shndx[i],
reloc_type[i],
&offset);
- map_sections[i].output_section = os;
- map_sections[i].offset = offset;
+ out_sections[i] = os;
+ if (offset == -1)
+ out_section_offsets[i] = invalid_address;
+ else
+ out_section_offsets[i] = convert_types<Address, off_t>(offset);
// If this section requires special handling, and if there are
// relocs that apply to it, then we must do the special handling
this->set_relocs_must_follow_section_writes();
}
- delete sd->section_headers;
- sd->section_headers = NULL;
- delete sd->section_names;
- sd->section_names = NULL;
+ if (is_gc_pass_two)
+ {
+ delete[] gc_sd->section_headers_data;
+ delete[] gc_sd->section_names_data;
+ delete[] gc_sd->symbols_data;
+ delete[] gc_sd->symbol_names_data;
+ }
+ else
+ {
+ delete sd->section_headers;
+ sd->section_headers = NULL;
+ delete sd->section_names;
+ sd->section_names = NULL;
+ }
+}
+
+// Layout sections whose layout was deferred while waiting for
+// input files from a plugin.
+
+template<int size, bool big_endian>
+void
+Sized_relobj<size, big_endian>::do_layout_deferred_sections(Layout* layout)
+{
+ typename std::vector<Deferred_layout>::iterator deferred;
+
+ for (deferred = this->deferred_layout_.begin();
+ deferred != this->deferred_layout_.end();
+ ++deferred)
+ {
+ typename This::Shdr shdr(deferred->shdr_data_);
+ this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(),
+ shdr, deferred->reloc_shndx_, deferred->reloc_type_);
+ }
+
+ this->deferred_layout_.clear();
}
// Add the symbols to the symbol table.
template<int size, bool big_endian>
void
Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
- Read_symbols_data* sd)
+ Read_symbols_data* sd,
+ Layout*)
{
if (sd->symbols == NULL)
{
reinterpret_cast<const char*>(sd->symbol_names->data());
symtab->add_from_relobj(this,
sd->symbols->data() + sd->external_symbols_offset,
- symcount, sym_names, sd->symbol_names_size,
- &this->symbols_);
+ symcount, this->local_symbol_count_,
+ sym_names, sd->symbol_names_size,
+ &this->symbols_,
+ &this->defined_count_);
delete sd->symbols;
sd->symbols = NULL;
gold_assert(loccount == symtabshdr.get_sh_info());
off_t locsize = loccount * sym_size;
const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
- locsize, true);
+ locsize, true, true);
// Read the symbol names.
- const unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ const unsigned int strtab_shndx =
+ this->adjust_shndx(symtabshdr.get_sh_link());
section_size_type strtab_size;
const unsigned char* pnamesu = this->section_contents(strtab_shndx,
&strtab_size,
// Loop over the local symbols.
- const std::vector<Map_to_output>& mo(this->map_to_output());
+ const Output_sections& out_sections(this->output_sections());
unsigned int shnum = this->shnum();
unsigned int count = 0;
unsigned int dyncount = 0;
Symbol_value<size>& lv(this->local_values_[i]);
- unsigned int shndx = sym.get_st_shndx();
- lv.set_input_shndx(shndx);
+ bool is_ordinary;
+ unsigned int shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(),
+ &is_ordinary);
+ lv.set_input_shndx(shndx, is_ordinary);
if (sym.get_st_type() == elfcpp::STT_SECTION)
lv.set_is_section_symbol();
// Decide whether this symbol should go into the output file.
- if (shndx < shnum && mo[shndx].output_section == NULL)
+ if (shndx < shnum && out_sections[shndx] == NULL)
{
lv.set_no_output_symtab_entry();
gold_assert(!lv.needs_output_dynsym_entry());
template<int size, bool big_endian>
unsigned int
Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
- off_t off)
+ off_t off)
{
gold_assert(off == static_cast<off_t>(align_address(off, size >> 3)));
const unsigned int loccount = this->local_symbol_count_;
this->local_symbol_offset_ = off;
- const std::vector<Map_to_output>& mo(this->map_to_output());
+ const bool relocatable = parameters->options().relocatable();
+ const Output_sections& out_sections(this->output_sections());
+ const std::vector<Address>& out_offsets(this->section_offsets_);
unsigned int shnum = this->shnum();
for (unsigned int i = 1; i < loccount; ++i)
{
Symbol_value<size>& lv(this->local_values_[i]);
- unsigned int shndx = lv.input_shndx();
+ bool is_ordinary;
+ unsigned int shndx = lv.input_shndx(&is_ordinary);
// Set the output symbol value.
-
- if (shndx >= elfcpp::SHN_LORESERVE)
+
+ if (!is_ordinary)
{
if (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON)
lv.set_output_value(lv.input_value());
else
{
- // FIXME: Handle SHN_XINDEX.
this->error(_("unknown section index %u for local symbol %u"),
shndx, i);
lv.set_output_value(0);
shndx = 0;
}
- Output_section* os = mo[shndx].output_section;
+ Output_section* os = out_sections[shndx];
if (os == NULL)
{
- lv.set_output_value(0);
+ // This local symbol belongs to a section we are discarding.
+ // In some cases when applying relocations later, we will
+ // attempt to match it to the corresponding kept section,
+ // so we leave the input value unchanged here.
continue;
}
- else if (mo[shndx].offset == -1)
+ else if (out_offsets[shndx] == invalid_address)
{
+ uint64_t start;
+
// This is a SHF_MERGE section or one which otherwise
- // requires special handling. We get the output address
- // of the start of the merged section. If this is not a
- // section symbol, we can then determine the final
- // value. If it is a section symbol, we can not, as in
- // that case we have to consider the addend to determine
- // the value to use in a relocation.
+ // requires special handling.
if (!lv.is_section_symbol())
- lv.set_output_value(os->output_address(this, shndx,
- lv.input_value()));
+ {
+ // This is not a section symbol. We can determine
+ // the final value now.
+ lv.set_output_value(os->output_address(this, shndx,
+ lv.input_value()));
+ }
+ else if (!os->find_starting_output_address(this, shndx, &start))
+ {
+ // This is a section symbol, but apparently not one
+ // in a merged section. Just use the start of the
+ // output section. This happens with relocatable
+ // links when the input object has section symbols
+ // for arbitrary non-merge sections.
+ lv.set_output_value(os->address());
+ }
else
{
- section_offset_type start =
- os->starting_output_address(this, shndx);
+ // We have to consider the addend to determine the
+ // value to use in a relocation. START is the start
+ // of this input section.
Merged_symbol_value<size>* msv =
new Merged_symbol_value<size>(lv.input_value(), start);
lv.set_merged_symbol_value(msv);
}
else if (lv.is_tls_symbol())
lv.set_output_value(os->tls_offset()
- + mo[shndx].offset
+ + out_offsets[shndx]
+ lv.input_value());
else
- lv.set_output_value(os->address()
- + mo[shndx].offset
+ lv.set_output_value((relocatable ? 0 : os->address())
+ + out_offsets[shndx]
+ lv.input_value());
}
Sized_relobj<size, big_endian>::write_local_symbols(
Output_file* of,
const Stringpool* sympool,
- const Stringpool* dynpool)
+ const Stringpool* dynpool,
+ Output_symtab_xindex* symtab_xindex,
+ Output_symtab_xindex* dynsym_xindex)
{
- if (parameters->options().strip_all()
- && this->output_local_dynsym_count_ == 0)
- return;
+ const bool strip_all = parameters->options().strip_all();
+ if (strip_all)
+ {
+ if (this->output_local_dynsym_count_ == 0)
+ return;
+ this->output_local_symbol_count_ = 0;
+ }
gold_assert(this->symtab_shndx_ != -1U);
if (this->symtab_shndx_ == 0)
const int sym_size = This::sym_size;
off_t locsize = loccount * sym_size;
const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
- locsize, false);
+ locsize, true, false);
// Read the symbol names.
- const unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ const unsigned int strtab_shndx =
+ this->adjust_shndx(symtabshdr.get_sh_link());
section_size_type strtab_size;
const unsigned char* pnamesu = this->section_contents(strtab_shndx,
&strtab_size,
dyn_oview = of->get_output_view(this->local_dynsym_offset_,
dyn_output_size);
- const std::vector<Map_to_output>& mo(this->map_to_output());
+ const Output_sections out_sections(this->output_sections());
gold_assert(this->local_values_.size() == loccount);
{
elfcpp::Sym<size, big_endian> isym(psyms);
- unsigned int st_shndx = isym.get_st_shndx();
- if (st_shndx < elfcpp::SHN_LORESERVE)
+ Symbol_value<size>& lv(this->local_values_[i]);
+
+ bool is_ordinary;
+ unsigned int st_shndx = this->adjust_sym_shndx(i, isym.get_st_shndx(),
+ &is_ordinary);
+ if (is_ordinary)
{
- gold_assert(st_shndx < mo.size());
- if (mo[st_shndx].output_section == NULL)
+ gold_assert(st_shndx < out_sections.size());
+ if (out_sections[st_shndx] == NULL)
continue;
- st_shndx = mo[st_shndx].output_section->out_shndx();
+ st_shndx = out_sections[st_shndx]->out_shndx();
+ if (st_shndx >= elfcpp::SHN_LORESERVE)
+ {
+ if (lv.needs_output_symtab_entry() && !strip_all)
+ symtab_xindex->add(lv.output_symtab_index(), st_shndx);
+ if (lv.needs_output_dynsym_entry())
+ dynsym_xindex->add(lv.output_dynsym_index(), st_shndx);
+ st_shndx = elfcpp::SHN_XINDEX;
+ }
}
// Write the symbol to the output symbol table.
- if (!parameters->options().strip_all()
- && this->local_values_[i].needs_output_symtab_entry())
+ if (!strip_all && lv.needs_output_symtab_entry())
{
elfcpp::Sym_write<size, big_endian> osym(ov);
}
// Write the symbol to the output dynamic symbol table.
- if (this->local_values_[i].needs_output_dynsym_entry())
+ if (lv.needs_output_dynsym_entry())
{
gold_assert(dyn_ov < dyn_oview + dyn_output_size);
elfcpp::Sym_write<size, big_endian> osym(dyn_ov);
&symbols_size,
false);
- unsigned int symbol_names_shndx = this->section_link(this->symtab_shndx_);
+ unsigned int symbol_names_shndx =
+ this->adjust_shndx(this->section_link(this->symtab_shndx_));
section_size_type names_size;
const unsigned char* symbol_names_u =
this->section_contents(symbol_names_shndx, &names_size, false);
info->source_file = "(invalid)";
else
info->source_file = symbol_names + sym.get_st_name();
+ continue;
}
- else if (sym.get_st_shndx() == shndx
- && static_cast<off_t>(sym.get_st_value()) <= offset
- && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size())
- > offset))
+
+ bool is_ordinary;
+ unsigned int st_shndx = this->adjust_sym_shndx(i, sym.get_st_shndx(),
+ &is_ordinary);
+ if (is_ordinary
+ && st_shndx == shndx
+ && static_cast<off_t>(sym.get_st_value()) <= offset
+ && (static_cast<off_t>(sym.get_st_value() + sym.get_st_size())
+ > offset))
{
if (sym.get_st_name() > names_size)
info->enclosing_symbol_name = "(invalid)";
return false;
}
+// Look for a kept section corresponding to the given discarded section,
+// and return its output address. This is used only for relocations in
+// debugging sections. If we can't find the kept section, return 0.
+
+template<int size, bool big_endian>
+typename Sized_relobj<size, big_endian>::Address
+Sized_relobj<size, big_endian>::map_to_kept_section(
+ unsigned int shndx,
+ bool* found) const
+{
+ Kept_comdat_section *kept = this->get_kept_comdat_section(shndx);
+ if (kept != NULL)
+ {
+ gold_assert(kept->object_ != NULL);
+ *found = true;
+ Output_section* os = kept->object_->output_section(kept->shndx_);
+ Address offset = kept->object_->get_output_section_offset(kept->shndx_);
+ gold_assert(os != NULL && offset != invalid_address);
+ return os->address() + offset;
+ }
+ *found = false;
+ return 0;
+}
+
+// Get symbol counts.
+
+template<int size, bool big_endian>
+void
+Sized_relobj<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 (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())
+ ++count;
+ *used = count;
+}
+
// Input_objects methods.
// Add a regular relocatable object to the list. Return false if this
return false;
}
+ // Print the filename if the -t/--trace option is selected.
+ if (parameters->options().trace())
+ gold_info("%s", obj->name().c_str());
+
if (!obj->is_dynamic())
this->relobj_list_.push_back(static_cast<Relobj*>(obj));
else
}
this->dynobj_list_.push_back(dynobj);
+ }
- // If this is -lc, remember the directory in which we found it.
- // We use this when issuing warnings about undefined symbols: as
- // a heuristic, we don't warn about system libraries found in
- // the same directory as -lc.
- if (strncmp(soname, "libc.so", 7) == 0)
- {
- const char* object_name = dynobj->name().c_str();
- const char* base = lbasename(object_name);
- if (base != object_name)
- this->system_library_directory_.assign(object_name,
- base - 1 - object_name);
- }
+ // Add this object to the cross-referencer if requested.
+ if (parameters->options().user_set_print_symbol_counts())
+ {
+ if (this->cref_ == NULL)
+ this->cref_ = new Cref();
+ this->cref_->add_object(obj);
}
return true;
}
-// Return whether an object was found in the system library directory.
-
-bool
-Input_objects::found_in_system_library_directory(const Object* object) const
-{
- return (!this->system_library_directory_.empty()
- && object->name().compare(0,
- this->system_library_directory_.size(),
- this->system_library_directory_) == 0);
-}
-
// For each dynamic object, record whether we've seen all of its
// explicit dependencies.
}
}
+// Start processing an archive.
+
+void
+Input_objects::archive_start(Archive* archive)
+{
+ if (parameters->options().user_set_print_symbol_counts())
+ {
+ if (this->cref_ == NULL)
+ this->cref_ = new Cref();
+ this->cref_->add_archive_start(archive);
+ }
+}
+
+// Stop processing an archive.
+
+void
+Input_objects::archive_stop(Archive* archive)
+{
+ if (parameters->options().user_set_print_symbol_counts())
+ this->cref_->add_archive_stop(archive);
+}
+
+// Print symbol counts
+
+void
+Input_objects::print_symbol_counts(const Symbol_table* symtab) const
+{
+ if (parameters->options().user_set_print_symbol_counts()
+ && this->cref_ != NULL)
+ this->cref_->print_symbol_counts(symtab);
+}
+
// Relocate_info methods.
// Return a string describing the location of a relocation. This is
}
else
{
- if (bytes < elfcpp::Elf_sizes<32>::ehdr_size)
+ if (bytes < elfcpp::Elf_sizes<64>::ehdr_size)
{
gold_error(_("%s: ELF file too short"), name.c_str());
return NULL;
projects / deliverable / binutils-gdb.git / blobdiff