#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
{
return false;
}
-// Class Relobj.
-
-// Return the output address of the input section SHNDX.
-uint64_t
-Relobj::output_section_address(unsigned int shndx) const
-{
- section_offset_type offset;
- Output_section* os = this->output_section(shndx, &offset);
- gold_assert(os != NULL && offset != -1);
- return os->address() + offset;
-}
-
// 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_(),
+ comdat_groups_(),
has_eh_frame_(false)
{
}
off_t readoff = this->has_eh_frame_ ? dataoff : extoff;
section_size_type readsize = this->has_eh_frame_ ? datasize : extsize;
+ 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.
bool include_group = ((flags & elfcpp::GRP_COMDAT) == 0
|| layout->add_comdat(this, index, signature, true));
- if (include_group && parameters->options().relocatable())
- layout->layout_group(symtab, this, index, name, signature.c_str(),
- shdr, pword);
-
- Relobj* kept_object = NULL;
+ Sized_relobj<size, big_endian>* kept_object = NULL;
Comdat_group* kept_group = NULL;
if (!include_group)
// This group is being discarded. Find the object and group
// that was kept in its place.
unsigned int kept_group_index = 0;
- kept_object = layout->find_kept_object(signature, &kept_group_index);
+ Relobj* kept_relobj = layout->find_kept_object(signature,
+ &kept_group_index);
+ kept_object = static_cast<Sized_relobj<size, big_endian>*>(kept_relobj);
if (kept_object != NULL)
kept_group = kept_object->find_comdat_group(kept_group_index);
}
}
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"),
}
}
+ if (relocate_group)
+ layout->layout_group(symtab, this, index, name, signature.c_str(),
+ shdr, flags, &shndxes);
+
return include_group;
}
// In this case, the section index stored with the layout object
// is the linkonce section that was kept.
unsigned int kept_group_index = 0;
- Relobj* kept_object = layout->find_kept_object(sig2, &kept_group_index);
- if (kept_object != NULL)
+ Relobj* kept_relobj = layout->find_kept_object(sig2, &kept_group_index);
+ 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);
// the group has only one member section. Otherwise, it's not
// worth the effort.
unsigned int kept_group_index = 0;
- Relobj* kept_object = layout->find_kept_object(sig1, &kept_group_index);
- if (kept_object != NULL)
+ Relobj* kept_relobj = layout->find_kept_object(sig1, &kept_group_index);
+ if (kept_relobj != NULL)
{
+ Sized_relobj<size, big_endian>* kept_object =
+ static_cast<Sized_relobj<size, big_endian>*>(kept_relobj);
Comdat_group* kept_group =
kept_object->find_comdat_group(kept_group_index);
if (kept_group != NULL && kept_group->size() == 1)
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
const unsigned char* pnamesu = 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.
{
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)
{
}
}
- 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_);
+
+ out_sections.resize(shnum);
+ out_section_offsets.resize(shnum);
// If we are only linking for symbols, then there is nothing else to
// do here.
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.
if (discard)
{
// Do not include this section in the link.
- map_sections[i].output_section = NULL;
+ out_sections[i] = NULL;
+ out_section_offsets[i] = invalid_address;
continue;
}
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;
-
- // 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 (should_defer_layout && (shdr.get_sh_flags() & elfcpp::SHF_ALLOC))
+ {
+ 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*>(1);
+ out_section_offsets[i] = invalid_address;
+ }
+ else
+ {
+ this->layout_section(layout, i, name, shdr, reloc_shndx[i],
+ reloc_type[i]);
+ }
}
layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags);
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.
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
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>
sd->symbols->data() + sd->external_symbols_offset,
symcount, this->local_symbol_count_,
sym_names, sd->symbol_names_size,
- &this->symbols_);
+ &this->symbols_,
+ &this->defined_count_);
delete sd->symbols;
sd->symbols = NULL;
// 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;
// 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());
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 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)
unsigned int shndx = lv.input_shndx(&is_ordinary);
// Set the output symbol value.
-
+
if (!is_ordinary)
{
if (shndx == elfcpp::SHN_ABS || shndx == elfcpp::SHN_COMMON)
shndx = 0;
}
- Output_section* os = mo[shndx].output_section;
+ Output_section* os = out_sections[shndx];
if (os == NULL)
{
// so we leave the input value unchanged here.
continue;
}
- else if (mo[shndx].offset == -1)
+ else if (out_offsets[shndx] == invalid_address)
{
// This is a SHF_MERGE section or one which otherwise
// requires special handling. We get the output address
}
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
+ + out_offsets[shndx]
+ lv.input_value());
}
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)
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);
&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())
+ 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);
}
// Write the symbol to the output symbol table.
- if (!parameters->options().strip_all()
- && lv.needs_output_symtab_entry())
+ if (!strip_all && lv.needs_output_symtab_entry())
{
elfcpp::Sym_write<size, big_endian> osym(ov);
{
gold_assert(kept->object_ != NULL);
*found = true;
- return (static_cast<Address>
- (kept->object_->output_section_address(kept->shndx_)));
+ 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
}
}
+ // 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;
}
}
}
+// 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
projects / binutils-gdb.git / blobdiff