// object.cc -- support for an object file for linking in gold
-// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
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 data into SD. This is code common to Sized_relobj_file
// and Sized_dynobj, so we put it into Object.
template<int size, bool big_endian>
}
// If NAME is the name of the special section which indicates that
-// this object was compiled with -fstack-split, mark it accordingly.
+// this object was compiled with -fsplit-stack, mark it accordingly.
bool
Object::handle_split_stack_section(const char* name)
// Finalize the incremental relocation information. Allocates a block
// of relocation entries for each symbol, and sets the reloc_bases_
-// array to point to the first entry in each block. Returns the next
-// available reloation index.
+// array to point to the first entry in each block. If CLEAR_COUNTS
+// is TRUE, also clear the per-symbol relocation counters.
void
-Relobj::finalize_incremental_relocs(Layout* layout)
+Relobj::finalize_incremental_relocs(Layout* layout, bool clear_counts)
{
unsigned int nsyms = this->get_global_symbols()->size();
this->reloc_bases_ = new unsigned int[nsyms];
{
this->reloc_bases_[i] = rindex;
rindex += this->reloc_counts_[i];
- this->reloc_counts_[i] = 0;
+ if (clear_counts)
+ this->reloc_counts_[i] = 0;
}
layout->incremental_inputs()->set_reloc_count(rindex);
}
// Class Sized_relobj.
+// 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_relobj<size, big_endian>::do_for_all_local_got_entries(
+ Got_offset_list::Visitor* v) const
+{
+ unsigned int nsyms = this->local_symbol_count();
+ for (unsigned int i = 0; i < nsyms; i++)
+ {
+ Local_got_offsets::const_iterator p = this->local_got_offsets_.find(i);
+ if (p != this->local_got_offsets_.end())
+ {
+ const Got_offset_list* got_offsets = p->second;
+ got_offsets->for_all_got_offsets(v);
+ }
+ }
+}
+
+// Class Sized_relobj_file.
+
template<int size, bool big_endian>
-Sized_relobj<size, big_endian>::Sized_relobj(
+Sized_relobj_file<size, big_endian>::Sized_relobj_file(
const std::string& name,
Input_file* input_file,
off_t offset,
const elfcpp::Ehdr<size, big_endian>& ehdr)
- : Relobj(name, input_file, offset),
+ : Sized_relobj<size, big_endian>(name, input_file, offset),
elf_file_(this, ehdr),
symtab_shndx_(-1U),
local_symbol_count_(0),
local_symbol_offset_(0),
local_dynsym_offset_(0),
local_values_(),
- local_got_offsets_(),
local_plt_offsets_(),
kept_comdat_sections_(),
has_eh_frame_(false),
deferred_layout_relocs_(),
compressed_sections_()
{
+ this->e_type_ = ehdr.get_e_type();
}
template<int size, bool big_endian>
-Sized_relobj<size, big_endian>::~Sized_relobj()
+Sized_relobj_file<size, big_endian>::~Sized_relobj_file()
{
}
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_setup()
+Sized_relobj_file<size, big_endian>::do_setup()
{
const unsigned int shnum = this->elf_file_.shnum();
this->set_shnum(shnum);
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs)
+Sized_relobj_file<size, big_endian>::find_symtab(const unsigned char* pshdrs)
{
const unsigned int shnum = this->shnum();
this->symtab_shndx_ = 0;
template<int size, bool big_endian>
Xindex*
-Sized_relobj<size, big_endian>::do_initialize_xindex()
+Sized_relobj_file<size, big_endian>::do_initialize_xindex()
{
gold_assert(this->symtab_shndx_ != -1U);
Xindex* xindex = new Xindex(this->elf_file_.large_shndx_offset());
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::check_eh_frame_flags(
+Sized_relobj_file<size, big_endian>::check_eh_frame_flags(
const elfcpp::Shdr<size, big_endian>* shdr) const
{
- return (shdr->get_sh_type() == elfcpp::SHT_PROGBITS
+ elfcpp::Elf_Word sh_type = shdr->get_sh_type();
+ return ((sh_type == elfcpp::SHT_PROGBITS
+ || sh_type == elfcpp::SHT_X86_64_UNWIND)
&& (shdr->get_sh_flags() & elfcpp::SHF_ALLOC) != 0);
}
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::find_eh_frame(
+Sized_relobj_file<size, big_endian>::find_eh_frame(
const unsigned char* pshdrs,
const char* names,
section_size_type names_size) const
unsigned int shnum,
const char* names,
section_size_type names_size,
- Sized_relobj<size, big_endian>* obj)
+ Sized_relobj_file<size, big_endian>* obj)
{
Compressed_section_map* uncompressed_sizes = new Compressed_section_map();
const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
+Sized_relobj_file<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
{
this->read_section_data(&this->elf_file_, sd);
// Return the section index of symbol SYM. Set *VALUE to its value in
// the object file. Set *IS_ORDINARY if this is an ordinary section
-// index. not a special cod between SHN_LORESERVE and SHN_HIRESERVE.
+// index, not a special code 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,
- bool* is_ordinary)
+Sized_relobj_file<size, big_endian>::symbol_section_and_value(unsigned int sym,
+ Address* value,
+ bool* is_ordinary)
{
section_size_type symbols_size;
const unsigned char* symbols = this->section_contents(this->symtab_shndx_,
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::include_section_group(
+Sized_relobj_file<size, big_endian>::include_section_group(
Symbol_table* symtab,
Layout* layout,
unsigned int index,
// just like ordinary sections.
elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword);
- // Look up the group signature, which is the name of a symbol. This
- // is a lot of effort to go to to read a string. Why didn't they
- // just have the group signature point into the string table, rather
- // than indirect through a symbol?
+ // Look up the group signature, which is the name of a symbol. ELF
+ // uses a symbol name because some group signatures are long, and
+ // the name is generally already in the symbol table, so it makes
+ // sense to put the long string just once in .strtab rather than in
+ // both .strtab and .shstrtab.
// Get the appropriate symbol table header (this will normally be
// the single SHT_SYMTAB section, but in principle it need not be).
is_comdat = true;
}
+ if (is_comdat && include_group)
+ {
+ Incremental_inputs* incremental_inputs = layout->incremental_inputs();
+ if (incremental_inputs != NULL)
+ incremental_inputs->report_comdat_group(this, signature.c_str());
+ }
+
size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word);
std::vector<unsigned int> shndxes;
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::include_linkonce_section(
+Sized_relobj_file<size, big_endian>::include_linkonce_section(
Layout* layout,
unsigned int index,
const char* name,
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)
+Sized_relobj_file<size, big_endian>::layout_section(
+ Layout* layout,
+ unsigned int shndx,
+ const char* name,
+ const typename This::Shdr& shdr,
+ unsigned int reloc_shndx,
+ unsigned int reloc_type)
{
off_t offset;
Output_section* os = layout->layout(this, shndx, name, shdr,
this->output_sections()[shndx] = os;
if (offset == -1)
- this->section_offsets_[shndx] = invalid_address;
+ this->section_offsets()[shndx] = invalid_address;
else
- this->section_offsets_[shndx] = convert_types<Address, off_t>(offset);
+ 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
this->set_relocs_must_follow_section_writes();
}
+// Layout an input .eh_frame section.
+
+template<int size, bool big_endian>
+void
+Sized_relobj_file<size, big_endian>::layout_eh_frame_section(
+ Layout* layout,
+ const unsigned char* symbols_data,
+ section_size_type symbols_size,
+ const unsigned char* symbol_names_data,
+ section_size_type symbol_names_size,
+ unsigned int shndx,
+ const typename This::Shdr& shdr,
+ unsigned int reloc_shndx,
+ unsigned int reloc_type)
+{
+ gold_assert(this->has_eh_frame_);
+
+ off_t offset;
+ Output_section* os = layout->layout_eh_frame(this,
+ symbols_data,
+ symbols_size,
+ symbol_names_data,
+ symbol_names_size,
+ shndx,
+ shdr,
+ reloc_shndx,
+ reloc_type,
+ &offset);
+ this->output_sections()[shndx] = os;
+ if (os == NULL || offset == -1)
+ {
+ // An object can contain at most one section holding exception
+ // frame information.
+ gold_assert(this->discarded_eh_frame_shndx_ == -1U);
+ this->discarded_eh_frame_shndx_ = shndx;
+ 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 aply to it, then we must do the special handling
+ // before we apply the relocs.
+ if (os != NULL && 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
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
- Layout* layout,
- Read_symbols_data* sd)
+Sized_relobj_file<size, big_endian>::do_layout(Symbol_table* symtab,
+ Layout* layout,
+ Read_symbols_data* sd)
{
const unsigned int shnum = this->shnum();
bool is_gc_pass_one = ((parameters->options().gc_sections()
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;
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;
}
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;
}
Output_sections& out_sections(this->output_sections());
- std::vector<Address>& out_section_offsets(this->section_offsets_);
+ std::vector<Address>& out_section_offsets(this->section_offsets());
if (!is_gc_pass_two)
{
{
if (this->handle_gnu_warning_section(name, i, symtab))
{
- if (!relocatable)
+ if (!relocatable && !parameters->options().shared())
omit[i] = true;
}
// -fsplit-stack.
if (this->handle_split_stack_section(name))
{
- if (!parameters->options().relocatable()
- && !parameters->options().shared())
+ if (!relocatable && !parameters->options().shared())
omit[i] = true;
}
// Add the section to the incremental inputs layout.
Incremental_inputs* incremental_inputs = layout->incremental_inputs();
- if (incremental_inputs != NULL)
- incremental_inputs->report_input_section(this, i,
- discard ? NULL : name,
- shdr.get_sh_size());
+ if (incremental_inputs != NULL
+ && !discard
+ && can_incremental_update(shdr.get_sh_type()))
+ {
+ off_t sh_size = shdr.get_sh_size();
+ section_size_type uncompressed_size;
+ if (this->section_is_compressed(i, &uncompressed_size))
+ sh_size = uncompressed_size;
+ incremental_inputs->report_input_section(this, i, name, sh_size);
+ }
if (discard)
{
if (is_gc_pass_one && parameters->options().gc_sections())
{
- if (is_section_name_included(name)
+ if (this->is_section_name_included(name)
|| shdr.get_sh_type() == elfcpp::SHT_INIT_ARRAY
|| shdr.get_sh_type() == elfcpp::SHT_FINI_ARRAY)
{
out_sections[i] = reinterpret_cast<Output_section*>(1);
out_section_offsets[i] = invalid_address;
}
- else
+ else if (should_defer_layout)
+ this->deferred_layout_.push_back(Deferred_layout(i, name,
+ pshdrs,
+ reloc_shndx[i],
+ reloc_type[i]));
+ else
eh_frame_sections.push_back(i);
continue;
}
}
if (!is_gc_pass_two)
- layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags);
+ layout->layout_gnu_stack(seen_gnu_stack, gnu_stack_flags, this);
// When doing a relocatable link handle the reloc sections at the
// end. Garbage collection and Identical Code Folding is not
p != eh_frame_sections.end();
++p)
{
- gold_assert(this->has_eh_frame_);
- gold_assert(external_symbols_offset != 0);
-
unsigned int i = *p;
const unsigned char* pshdr;
pshdr = section_headers_data + i * This::shdr_size;
typename This::Shdr shdr(pshdr);
- off_t offset;
- Output_section* os = layout->layout_eh_frame(this,
- symbols_data,
- symbols_size,
- symbol_names_data,
- symbol_names_size,
- i, shdr,
- reloc_shndx[i],
- reloc_type[i],
- &offset);
- out_sections[i] = os;
- if (os == NULL || offset == -1)
- {
- // An object can contain at most one section holding exception
- // frame information.
- gold_assert(this->discarded_eh_frame_shndx_ == -1U);
- this->discarded_eh_frame_shndx_ = i;
- 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
- // before we apply the relocs.
- if (os != NULL && offset == -1 && reloc_shndx[i] != 0)
- this->set_relocs_must_follow_section_writes();
+ this->layout_eh_frame_section(layout,
+ symbols_data,
+ symbols_size,
+ symbol_names_data,
+ symbol_names_size,
+ i,
+ shdr,
+ reloc_shndx[i],
+ reloc_type[i]);
}
if (is_gc_pass_two)
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_layout_deferred_sections(Layout* layout)
+Sized_relobj_file<size, big_endian>::do_layout_deferred_sections(Layout* layout)
{
typename std::vector<Deferred_layout>::iterator deferred;
if (!this->is_section_included(deferred->shndx_))
continue;
- this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(),
- shdr, deferred->reloc_shndx_, deferred->reloc_type_);
+ if (parameters->options().relocatable()
+ || deferred->name_ != ".eh_frame"
+ || !this->check_eh_frame_flags(&shdr))
+ this->layout_section(layout, deferred->shndx_, deferred->name_.c_str(),
+ shdr, deferred->reloc_shndx_,
+ deferred->reloc_type_);
+ else
+ {
+ // Reading the symbols again here may be slow.
+ Read_symbols_data sd;
+ this->read_symbols(&sd);
+ this->layout_eh_frame_section(layout,
+ sd.symbols->data(),
+ sd.symbols_size,
+ sd.symbol_names->data(),
+ sd.symbol_names_size,
+ deferred->shndx_,
+ shdr,
+ deferred->reloc_shndx_,
+ deferred->reloc_type_);
+ }
}
this->deferred_layout_.clear();
// Now handle the deferred relocation sections.
Output_sections& out_sections(this->output_sections());
- std::vector<Address>& out_section_offsets(this->section_offsets_);
+ std::vector<Address>& out_section_offsets(this->section_offsets());
for (deferred = this->deferred_layout_relocs_.begin();
deferred != this->deferred_layout_relocs_.end();
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
- Read_symbols_data* sd,
- Layout*)
+Sized_relobj_file<size, big_endian>::do_add_symbols(Symbol_table* symtab,
+ Read_symbols_data* sd,
+ Layout*)
{
if (sd->symbols == NULL)
{
template<int size, bool big_endian>
Archive::Should_include
-Sized_relobj<size, big_endian>::do_should_include_member(Symbol_table* symtab,
- Layout* layout,
- Read_symbols_data* sd,
- std::string* why)
+Sized_relobj_file<size, big_endian>::do_should_include_member(
+ Symbol_table* symtab,
+ Layout* layout,
+ Read_symbols_data* sd,
+ std::string* why)
{
char* tmpbuf = NULL;
size_t tmpbuflen = 0;
return Archive::SHOULD_INCLUDE_UNKNOWN;
}
+// Iterate over global defined symbols, calling a visitor class V for each.
+
+template<int size, bool big_endian>
+void
+Sized_relobj_file<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)
+ v->visit(sym_names + sym.get_st_name());
+ }
+}
+
// Return whether the local symbol SYMNDX has a PLT offset.
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::local_has_plt_offset(unsigned int symndx) const
+Sized_relobj_file<size, big_endian>::local_has_plt_offset(
+ unsigned int symndx) const
{
typename Local_plt_offsets::const_iterator p =
this->local_plt_offsets_.find(symndx);
template<int size, bool big_endian>
unsigned int
-Sized_relobj<size, big_endian>::local_plt_offset(unsigned int symndx) const
+Sized_relobj_file<size, big_endian>::do_local_plt_offset(
+ unsigned int symndx) const
{
typename Local_plt_offsets::const_iterator p =
this->local_plt_offsets_.find(symndx);
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::set_local_plt_offset(unsigned int symndx,
- unsigned int plt_offset)
+Sized_relobj_file<size, big_endian>::set_local_plt_offset(
+ unsigned int symndx, unsigned int plt_offset)
{
std::pair<typename Local_plt_offsets::iterator, bool> ins =
this->local_plt_offsets_.insert(std::make_pair(symndx, plt_offset));
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
- Stringpool* dynpool)
+Sized_relobj_file<size, big_endian>::do_count_local_symbols(Stringpool* pool,
+ Stringpool* dynpool)
{
gold_assert(this->symtab_shndx_ != -1U);
if (this->symtab_shndx_ == 0)
unsigned int dyncount = 0;
// Skip the first, dummy, symbol.
psyms += sym_size;
+ bool strip_all = parameters->options().strip_all();
bool discard_all = parameters->options().discard_all();
bool discard_locals = parameters->options().discard_locals();
for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
++dyncount;
}
- if (discard_all && lv.may_be_discarded_from_output_symtab())
+ if (strip_all
+ || (discard_all && lv.may_be_discarded_from_output_symtab()))
{
lv.set_no_output_symtab_entry();
continue;
this->output_local_dynsym_count_ = dyncount;
}
+// Compute the final value of a local symbol.
+
+template<int size, bool big_endian>
+typename Sized_relobj_file<size, big_endian>::Compute_final_local_value_status
+Sized_relobj_file<size, big_endian>::compute_final_local_value_internal(
+ unsigned int r_sym,
+ const Symbol_value<size>* lv_in,
+ Symbol_value<size>* lv_out,
+ bool relocatable,
+ const Output_sections& out_sections,
+ const std::vector<Address>& out_offsets,
+ const Symbol_table* symtab)
+{
+ // We are going to overwrite *LV_OUT, if it has a merged symbol value,
+ // we may have a memory leak.
+ gold_assert(lv_out->has_output_value());
+
+ bool is_ordinary;
+ unsigned int shndx = lv_in->input_shndx(&is_ordinary);
+
+ // Set the output symbol value.
+
+ if (!is_ordinary)
+ {
+ if (shndx == elfcpp::SHN_ABS || Symbol::is_common_shndx(shndx))
+ lv_out->set_output_value(lv_in->input_value());
+ else
+ {
+ this->error(_("unknown section index %u for local symbol %u"),
+ shndx, r_sym);
+ lv_out->set_output_value(0);
+ return This::CFLV_ERROR;
+ }
+ }
+ else
+ {
+ if (shndx >= this->shnum())
+ {
+ this->error(_("local symbol %u section index %u out of range"),
+ r_sym, shndx);
+ lv_out->set_output_value(0);
+ return This::CFLV_ERROR;
+ }
+
+ Output_section* os = out_sections[shndx];
+ Address secoffset = out_offsets[shndx];
+ if (symtab->is_section_folded(this, shndx))
+ {
+ gold_assert(os == NULL && secoffset == invalid_address);
+ // Get the os of the section it is folded onto.
+ Section_id folded = symtab->icf()->get_folded_section(this,
+ shndx);
+ gold_assert(folded.first != NULL);
+ Sized_relobj_file<size, big_endian>* folded_obj = reinterpret_cast
+ <Sized_relobj_file<size, big_endian>*>(folded.first);
+ os = folded_obj->output_section(folded.second);
+ gold_assert(os != NULL);
+ secoffset = folded_obj->get_output_section_offset(folded.second);
+
+ // This could be a relaxed input section.
+ if (secoffset == invalid_address)
+ {
+ const Output_relaxed_input_section* relaxed_section =
+ os->find_relaxed_input_section(folded_obj, folded.second);
+ gold_assert(relaxed_section != NULL);
+ secoffset = relaxed_section->address() - os->address();
+ }
+ }
+
+ if (os == NULL)
+ {
+ // 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.
+ return This::CFLV_DISCARDED;
+ }
+ else if (secoffset == invalid_address)
+ {
+ uint64_t start;
+
+ // This is a SHF_MERGE section or one which otherwise
+ // requires special handling.
+ if (shndx == this->discarded_eh_frame_shndx_)
+ {
+ // This local symbol belongs to a discarded .eh_frame
+ // section. Just treat it like the case in which
+ // os == NULL above.
+ gold_assert(this->has_eh_frame_);
+ return This::CFLV_DISCARDED;
+ }
+ else if (!lv_in->is_section_symbol())
+ {
+ // This is not a section symbol. We can determine
+ // the final value now.
+ lv_out->set_output_value(
+ os->output_address(this, shndx, lv_in->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. First check to see if this is a relaxed
+ // input section. If so, use its address. Otherwise 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.
+ const Output_section_data* posd =
+ os->find_relaxed_input_section(this, shndx);
+ if (posd != NULL)
+ {
+ Address relocatable_link_adjustment =
+ relocatable ? os->address() : 0;
+ lv_out->set_output_value(posd->address()
+ - relocatable_link_adjustment);
+ }
+ else
+ lv_out->set_output_value(os->address());
+ }
+ else
+ {
+ // We have to consider the addend to determine the
+ // value to use in a relocation. START is the start
+ // of this input section. If we are doing a relocatable
+ // link, use offset from start output section instead of
+ // address.
+ Address adjusted_start =
+ relocatable ? start - os->address() : start;
+ Merged_symbol_value<size>* msv =
+ new Merged_symbol_value<size>(lv_in->input_value(),
+ adjusted_start);
+ lv_out->set_merged_symbol_value(msv);
+ }
+ }
+ else if (lv_in->is_tls_symbol())
+ lv_out->set_output_value(os->tls_offset()
+ + secoffset
+ + lv_in->input_value());
+ else
+ lv_out->set_output_value((relocatable ? 0 : os->address())
+ + secoffset
+ + lv_in->input_value());
+ }
+ return This::CFLV_OK;
+}
+
+// Compute final local symbol value. R_SYM is the index of a local
+// symbol in symbol table. LV points to a symbol value, which is
+// expected to hold the input value and to be over-written by the
+// final value. SYMTAB points to a symbol table. Some targets may want
+// to know would-be-finalized local symbol values in relaxation.
+// Hence we provide this method. Since this method updates *LV, a
+// callee should make a copy of the original local symbol value and
+// use the copy instead of modifying an object's local symbols before
+// everything is finalized. The caller should also free up any allocated
+// memory in the return value in *LV.
+template<int size, bool big_endian>
+typename Sized_relobj_file<size, big_endian>::Compute_final_local_value_status
+Sized_relobj_file<size, big_endian>::compute_final_local_value(
+ unsigned int r_sym,
+ const Symbol_value<size>* lv_in,
+ Symbol_value<size>* lv_out,
+ const Symbol_table* symtab)
+{
+ // This is just a wrapper of compute_final_local_value_internal.
+ const bool relocatable = parameters->options().relocatable();
+ const Output_sections& out_sections(this->output_sections());
+ const std::vector<Address>& out_offsets(this->section_offsets());
+ return this->compute_final_local_value_internal(r_sym, lv_in, lv_out,
+ relocatable, out_sections,
+ out_offsets, symtab);
+}
+
// Finalize the local symbols. Here we set the final value in
// THIS->LOCAL_VALUES_ and set their output symbol table indexes.
// This function is always called from a singleton thread. The actual
template<int size, bool big_endian>
unsigned int
-Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
- off_t off,
- Symbol_table* symtab)
+Sized_relobj_file<size, big_endian>::do_finalize_local_symbols(
+ unsigned int index,
+ off_t off,
+ Symbol_table* symtab)
{
gold_assert(off == static_cast<off_t>(align_address(off, size >> 3)));
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();
+ const std::vector<Address>& out_offsets(this->section_offsets());
for (unsigned int i = 1; i < loccount; ++i)
{
- Symbol_value<size>& lv(this->local_values_[i]);
-
- bool is_ordinary;
- unsigned int shndx = lv.input_shndx(&is_ordinary);
+ Symbol_value<size>* lv = &this->local_values_[i];
- // Set the output symbol value.
-
- if (!is_ordinary)
+ Compute_final_local_value_status cflv_status =
+ this->compute_final_local_value_internal(i, lv, lv, relocatable,
+ out_sections, out_offsets,
+ symtab);
+ switch (cflv_status)
{
- if (shndx == elfcpp::SHN_ABS || Symbol::is_common_shndx(shndx))
- lv.set_output_value(lv.input_value());
- else
+ case CFLV_OK:
+ if (!lv->is_output_symtab_index_set())
{
- this->error(_("unknown section index %u for local symbol %u"),
- shndx, i);
- lv.set_output_value(0);
+ lv->set_output_symtab_index(index);
+ ++index;
}
+ break;
+ case CFLV_DISCARDED:
+ case CFLV_ERROR:
+ // Do nothing.
+ break;
+ default:
+ gold_unreachable();
}
- else
- {
- if (shndx >= shnum)
- {
- this->error(_("local symbol %u section index %u out of range"),
- i, shndx);
- shndx = 0;
- }
-
- Output_section* os = out_sections[shndx];
- Address secoffset = out_offsets[shndx];
- if (symtab->is_section_folded(this, shndx))
- {
- gold_assert(os == NULL && secoffset == invalid_address);
- // Get the os of the section it is folded onto.
- Section_id folded = symtab->icf()->get_folded_section(this,
- shndx);
- gold_assert(folded.first != NULL);
- Sized_relobj<size, big_endian>* folded_obj = reinterpret_cast
- <Sized_relobj<size, big_endian>*>(folded.first);
- os = folded_obj->output_section(folded.second);
- gold_assert(os != NULL);
- secoffset = folded_obj->get_output_section_offset(folded.second);
-
- // This could be a relaxed input section.
- if (secoffset == invalid_address)
- {
- const Output_relaxed_input_section* relaxed_section =
- os->find_relaxed_input_section(folded_obj, folded.second);
- gold_assert(relaxed_section != NULL);
- secoffset = relaxed_section->address() - os->address();
- }
- }
-
- if (os == NULL)
- {
- // 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 (secoffset == invalid_address)
- {
- uint64_t start;
-
- // This is a SHF_MERGE section or one which otherwise
- // requires special handling.
- if (shndx == this->discarded_eh_frame_shndx_)
- {
- // This local symbol belongs to a discarded .eh_frame
- // section. Just treat it like the case in which
- // os == NULL above.
- gold_assert(this->has_eh_frame_);
- continue;
- }
- else if (!lv.is_section_symbol())
- {
- // 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. First check to see if this is a relaxed
- // input section. If so, use its address. Otherwise 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.
- const Output_section_data* posd =
- os->find_relaxed_input_section(this, shndx);
- if (posd != NULL)
- {
- Address relocatable_link_adjustment =
- relocatable ? os->address() : 0;
- lv.set_output_value(posd->address()
- - relocatable_link_adjustment);
- }
- else
- lv.set_output_value(os->address());
- }
- else
- {
- // We have to consider the addend to determine the
- // value to use in a relocation. START is the start
- // of this input section. If we are doing a relocatable
- // link, use offset from start output section instead of
- // address.
- Address adjusted_start =
- relocatable ? start - os->address() : start;
- Merged_symbol_value<size>* msv =
- new Merged_symbol_value<size>(lv.input_value(),
- adjusted_start);
- lv.set_merged_symbol_value(msv);
- }
- }
- else if (lv.is_tls_symbol())
- lv.set_output_value(os->tls_offset()
- + secoffset
- + lv.input_value());
- else
- lv.set_output_value((relocatable ? 0 : os->address())
- + secoffset
- + lv.input_value());
- }
-
- if (!lv.is_output_symtab_index_set())
- {
- lv.set_output_symtab_index(index);
- ++index;
- }
}
return index;
}
template<int size, bool big_endian>
unsigned int
-Sized_relobj<size, big_endian>::do_set_local_dynsym_indexes(unsigned int index)
+Sized_relobj_file<size, big_endian>::do_set_local_dynsym_indexes(
+ unsigned int index)
{
const unsigned int loccount = this->local_symbol_count_;
for (unsigned int i = 1; i < loccount; ++i)
template<int size, bool big_endian>
unsigned int
-Sized_relobj<size, big_endian>::do_set_local_dynsym_offset(off_t off)
+Sized_relobj_file<size, big_endian>::do_set_local_dynsym_offset(off_t off)
{
gold_assert(off == static_cast<off_t>(align_address(off, size >> 3)));
this->local_dynsym_offset_ = off;
template<int size, bool big_endian>
uint64_t
-Sized_relobj<size, big_endian>::do_section_flags(unsigned int shndx)
+Sized_relobj_file<size, big_endian>::do_section_flags(unsigned int shndx)
{
Symbols_data* sd = this->get_symbols_data();
if (sd != NULL)
template<int size, bool big_endian>
uint64_t
-Sized_relobj<size, big_endian>::do_section_entsize(unsigned int shndx)
+Sized_relobj_file<size, big_endian>::do_section_entsize(unsigned int shndx)
{
Symbols_data* sd = this->get_symbols_data();
gold_assert(sd != NULL);
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::write_local_symbols(
+Sized_relobj_file<size, big_endian>::write_local_symbols(
Output_file* of,
const Stringpool* sympool,
const Stringpool* dynpool,
Output_symtab_xindex* symtab_xindex,
- Output_symtab_xindex* dynsym_xindex)
+ Output_symtab_xindex* dynsym_xindex,
+ off_t symtab_off)
{
const bool strip_all = parameters->options().strip_all();
if (strip_all)
off_t output_size = this->output_local_symbol_count_ * sym_size;
unsigned char* oview = NULL;
if (output_size > 0)
- oview = of->get_output_view(this->local_symbol_offset_, output_size);
+ oview = of->get_output_view(symtab_off + this->local_symbol_offset_,
+ output_size);
off_t dyn_output_size = this->output_local_dynsym_count_ * sym_size;
unsigned char* dyn_oview = NULL;
if (output_size > 0)
{
gold_assert(ov - oview == output_size);
- of->write_output_view(this->local_symbol_offset_, output_size, oview);
+ of->write_output_view(symtab_off + this->local_symbol_offset_,
+ output_size, oview);
}
if (dyn_output_size > 0)
template<int size, bool big_endian>
bool
-Sized_relobj<size, big_endian>::get_symbol_location_info(
+Sized_relobj_file<size, big_endian>::get_symbol_location_info(
unsigned int shndx,
off_t offset,
Symbol_location_info* info)
// 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(
+typename Sized_relobj_file<size, big_endian>::Address
+Sized_relobj_file<size, big_endian>::map_to_kept_section(
unsigned int shndx,
bool* found) const
{
unsigned int kept_shndx;
if (this->get_kept_comdat_section(shndx, &kept_object, &kept_shndx))
{
- Sized_relobj<size, big_endian>* kept_relobj =
- static_cast<Sized_relobj<size, big_endian>*>(kept_object);
+ Sized_relobj_file<size, big_endian>* kept_relobj =
+ static_cast<Sized_relobj_file<size, big_endian>*>(kept_object);
Output_section* os = kept_relobj->output_section(kept_shndx);
Address offset = kept_relobj->get_output_section_offset(kept_shndx);
if (os != NULL && offset != invalid_address)
template<int size, bool big_endian>
void
-Sized_relobj<size, big_endian>::do_get_global_symbol_counts(
+Sized_relobj_file<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();
+ for (typename Symbols::const_iterator p = this->symbols_.begin();
p != this->symbols_.end();
++p)
if (*p != NULL
// Relocate_info methods.
-// Return a string describing the location of a relocation. This is
-// only used in error messages.
+// Return a string describing the location of a relocation when file
+// and lineno information is not available. This is only used in
+// error messages.
template<int size, bool big_endian>
std::string
Relocate_info<size, big_endian>::location(size_t, off_t offset) const
{
- // See if we can get line-number information from debugging sections.
- std::string filename;
- std::string file_and_lineno; // Better than filename-only, if available.
-
Sized_dwarf_line_info<size, big_endian> line_info(this->object);
- // This will be "" if we failed to parse the debug info for any reason.
- file_and_lineno = line_info.addr2line(this->data_shndx, offset);
+ std::string ret = line_info.addr2line(this->data_shndx, offset, NULL);
+ if (!ret.empty())
+ return ret;
+
+ ret = this->object->name();
- std::string ret(this->object->name());
- ret += ':';
Symbol_location_info info;
if (this->object->get_symbol_location_info(this->data_shndx, offset, &info))
{
- ret += " in function ";
- ret += info.enclosing_symbol_name;
- ret += ":";
- filename = info.source_file;
- }
-
- if (!file_and_lineno.empty())
- ret += file_and_lineno;
- else
- {
- if (!filename.empty())
- ret += filename;
- ret += "(";
- ret += this->object->section_name(this->data_shndx);
- char buf[100];
- // Offsets into sections have to be positive.
- snprintf(buf, sizeof(buf), "+0x%lx", static_cast<long>(offset));
+ if (!info.source_file.empty())
+ {
+ ret += ":";
+ ret += info.source_file;
+ }
+ size_t len = info.enclosing_symbol_name.length() + 100;
+ char* buf = new char[len];
+ snprintf(buf, len, _(":function %s"),
+ info.enclosing_symbol_name.c_str());
ret += buf;
- ret += ")";
+ delete[] buf;
+ return ret;
}
+
+ ret += "(";
+ ret += this->object->section_name(this->data_shndx);
+ char buf[100];
+ snprintf(buf, sizeof buf, "+0x%lx)", static_cast<long>(offset));
+ ret += buf;
return ret;
}
#ifdef HAVE_TARGET_32_LITTLE
template
-class Sized_relobj<32, false>;
+class Sized_relobj_file<32, false>;
#endif
#ifdef HAVE_TARGET_32_BIG
template
-class Sized_relobj<32, true>;
+class Sized_relobj_file<32, true>;
#endif
#ifdef HAVE_TARGET_64_LITTLE
template
-class Sized_relobj<64, false>;
+class Sized_relobj_file<64, false>;
#endif
#ifdef HAVE_TARGET_64_BIG
template
-class Sized_relobj<64, true>;
+class Sized_relobj_file<64, true>;
#endif
#ifdef HAVE_TARGET_32_LITTLE