#include <cerrno>
#include <cstring>
-#include <cassert>
+#include <cstdarg>
+#include "target-select.h"
+#include "layout.h"
+#include "output.h"
+#include "symtab.h"
#include "object.h"
+#include "dynobj.h"
namespace gold
{
// Class Object.
-const unsigned char*
-Object::get_view(off_t start, off_t size)
+// Set the target based on fields in the ELF file header.
+
+void
+Object::set_target(int machine, int size, bool big_endian, int osabi,
+ int abiversion)
{
- return this->input_file_->file().get_view(start + this->offset_, size);
+ Target* target = select_target(machine, size, big_endian, osabi, abiversion);
+ if (target == NULL)
+ {
+ fprintf(stderr, _("%s: %s: unsupported ELF machine number %d\n"),
+ program_name, this->name().c_str(), machine);
+ gold_exit(false);
+ }
+ this->target_ = target;
}
+// Report an error for the elfcpp::Elf_file interface.
+
void
-Object::read(off_t start, off_t size, void* p)
+Object::error(const char* format, ...)
{
- this->input_file_->file().read(start + this->offset_, size, p);
+ va_list args;
+
+ fprintf(stderr, "%s: %s: ", program_name, this->name().c_str());
+ va_start(args, format);
+ vfprintf(stderr, format, args);
+ va_end(args);
+ putc('\n', stderr);
+
+ gold_exit(false);
}
-File_view*
-Object::get_lasting_view(off_t start, off_t size)
+// Return a view of the contents of a section.
+
+const unsigned char*
+Object::section_contents(unsigned int shndx, off_t* plen)
{
- return this->input_file_->file().get_lasting_view(start + this->offset_,
- size);
+ Location loc(this->do_section_contents(shndx));
+ *plen = loc.data_size;
+ return this->get_view(loc.file_offset, loc.data_size);
}
-// Class Sized_object.
+// Read the section data into SD. This is code common to Sized_relobj
+// and Sized_dynobj, so we put it into Object.
template<int size, bool big_endian>
-Sized_object<size, big_endian>::Sized_object(
- const std::string& name,
- Input_file* input_file,
- off_t offset,
- const elfcpp::Ehdr<size, big_endian>& ehdr)
- : Object(name, input_file, offset),
- osabi_(ehdr.get_e_ident()[elfcpp::EI_OSABI]),
- abiversion_(ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]),
- machine_(ehdr.get_e_machine()),
- flags_(ehdr.get_e_flags()),
- target_(NULL),
- shoff_(ehdr.get_e_shoff()),
- shnum_(0),
- shstrndx_(0),
- symtab_shnum_(0)
+void
+Object::read_section_data(elfcpp::Elf_file<size, big_endian, Object>* elf_file,
+ Read_symbols_data* sd)
{
- if (ehdr.get_e_ehsize() != elfcpp::Elf_sizes<size>::ehdr_size)
+ const int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
+
+ // 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);
+
+ // Read the section names.
+ const unsigned char* pshdrs = sd->section_headers->data();
+ const unsigned char* pshdrnames = pshdrs + elf_file->shstrndx() * shdr_size;
+ typename elfcpp::Shdr<size, big_endian> shdrnames(pshdrnames);
+
+ if (shdrnames.get_sh_type() != elfcpp::SHT_STRTAB)
{
- fprintf(stderr, _("%s: %s: bad e_ehsize field (%d != %d)\n"),
- program_name, this->name().c_str(), ehdr.get_e_ehsize(),
- elfcpp::Elf_sizes<size>::ehdr_size);
+ fprintf(stderr,
+ _("%s: %s: section name section has wrong type: %u\n"),
+ program_name, this->name().c_str(),
+ static_cast<unsigned int>(shdrnames.get_sh_type()));
gold_exit(false);
}
- if (ehdr.get_e_shentsize() != elfcpp::Elf_sizes<size>::shdr_size)
+
+ sd->section_names_size = shdrnames.get_sh_size();
+ sd->section_names = this->get_lasting_view(shdrnames.get_sh_offset(),
+ sd->section_names_size);
+}
+
+// If NAME is the name of a special .gnu.warning section, arrange for
+// the warning to be issued. SHNDX is the section index. Return
+// whether it is a warning section.
+
+bool
+Object::handle_gnu_warning_section(const char* name, unsigned int shndx,
+ Symbol_table* symtab)
+{
+ const char warn_prefix[] = ".gnu.warning.";
+ const int warn_prefix_len = sizeof warn_prefix - 1;
+ if (strncmp(name, warn_prefix, warn_prefix_len) == 0)
{
- fprintf(stderr, _("%s: %s: bad e_shentsize field (%d != %d)\n"),
- program_name, this->name().c_str(), ehdr.get_e_shentsize(),
- elfcpp::Elf_sizes<size>::shdr_size);
- gold_exit(false);
+ symtab->add_warning(name + warn_prefix_len, this, shndx);
+ return true;
}
+ return false;
+}
+
+// Class Sized_relobj.
+
+template<int size, bool big_endian>
+Sized_relobj<size, big_endian>::Sized_relobj(
+ const std::string& name,
+ Input_file* input_file,
+ off_t offset,
+ const elfcpp::Ehdr<size, big_endian>& ehdr)
+ : Relobj(name, input_file, offset),
+ elf_file_(this, ehdr),
+ symtab_shndx_(-1U),
+ local_symbol_count_(0),
+ output_local_symbol_count_(0),
+ symbols_(NULL),
+ local_symbol_offset_(0),
+ local_values_(),
+ local_indexes_()
+{
}
template<int size, bool big_endian>
-Sized_object<size, big_endian>::~Sized_object()
+Sized_relobj<size, big_endian>::~Sized_relobj()
{
}
-// Set up an object file bsaed on the file header. This sets up the
+// Set up an object file based on the file header. This sets up the
// target and reads the section information.
template<int size, bool big_endian>
void
-Sized_object<size, big_endian>::setup(
+Sized_relobj<size, big_endian>::setup(
const elfcpp::Ehdr<size, big_endian>& ehdr)
{
- // this->target_ = select_target(this->machine_, size, big_endian,
- // this->osabi_, this->abiversion_);
- unsigned int shnum = ehdr.get_e_shnum();
- unsigned int shstrndx = ehdr.get_e_shstrndx();
- if ((shnum == 0 || shstrndx == elfcpp::SHN_XINDEX)
- && this->shoff_ != 0)
- {
- const unsigned char* p = this->get_view
- (this->shoff_, elfcpp::Elf_sizes<size>::shdr_size);
- elfcpp::Shdr<size, big_endian> shdr(p);
- if (shnum == 0)
- shnum = shdr.get_sh_size();
- if (shstrndx == elfcpp::SHN_XINDEX)
- shstrndx = shdr.get_sh_link();
- }
- this->shnum_ = shnum;
- this->shstrndx_ = shstrndx;
+ this->set_target(ehdr.get_e_machine(), size, big_endian,
+ ehdr.get_e_ident()[elfcpp::EI_OSABI],
+ ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
- if (shnum == 0)
- return;
+ const unsigned int shnum = this->elf_file_.shnum();
+ this->set_shnum(shnum);
+}
- // Find the SHT_SYMTAB section.
- const unsigned char* p = this->get_view
- (this->shoff_, shnum * elfcpp::Elf_sizes<size>::shdr_size);
- // Skip the first section, which is always empty.
- p += elfcpp::Elf_sizes<size>::shdr_size;
- for (unsigned int i = 1; i < shnum; ++i)
+// Find the SHT_SYMTAB section, given the section headers. The ELF
+// standard says that maybe in the future there can be more than one
+// SHT_SYMTAB section. Until somebody figures out how that could
+// work, we assume there is only one.
+
+template<int size, bool big_endian>
+void
+Sized_relobj<size, big_endian>::find_symtab(const unsigned char* pshdrs)
+{
+ const unsigned int shnum = this->shnum();
+ this->symtab_shndx_ = 0;
+ if (shnum > 0)
{
- elfcpp::Shdr<size, big_endian> shdr(p);
- if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB)
+ // Look through the sections in reverse order, since gas tends
+ // to put the symbol table at the end.
+ const unsigned char* p = pshdrs + shnum * This::shdr_size;
+ unsigned int i = shnum;
+ while (i > 0)
{
- this->symtab_shnum_ = i;
- break;
+ --i;
+ p -= This::shdr_size;
+ typename This::Shdr shdr(p);
+ if (shdr.get_sh_type() == elfcpp::SHT_SYMTAB)
+ {
+ this->symtab_shndx_ = i;
+ break;
+ }
}
- p += elfcpp::Elf_sizes<size>::shdr_size;
}
}
-// Read the symbols and relocations from an object file.
+// Read the sections and symbols from an object file.
template<int size, bool big_endian>
-Read_symbols_data
-Sized_object<size, big_endian>::do_read_symbols()
+void
+Sized_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
{
- if (this->symtab_shnum_ == 0)
+ this->read_section_data(&this->elf_file_, sd);
+
+ const unsigned char* const pshdrs = sd->section_headers->data();
+
+ this->find_symtab(pshdrs);
+
+ if (this->symtab_shndx_ == 0)
{
// No symbol table. Weird but legal.
- Read_symbols_data ret;
- ret.symbols = NULL;
- ret.symbols_size = 0;
- ret.symbol_names = NULL;
- ret.symbol_names_size = 0;
- return ret;
+ sd->symbols = NULL;
+ sd->symbols_size = 0;
+ sd->symbol_names = NULL;
+ sd->symbol_names_size = 0;
+ return;
}
- int shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
+ // Get the symbol table section header.
+ typename This::Shdr symtabshdr(pshdrs
+ + this->symtab_shndx_ * This::shdr_size);
+ gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
- // Read the symbol table section header.
- off_t symtabshdroff = this->shoff_ + (this->symtab_shnum_ * shdr_size);
- const unsigned char* psymtabshdr = this->get_view(symtabshdroff, shdr_size);
- elfcpp::Shdr<size, big_endian> symtabshdr(psymtabshdr);
- assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
+ // We only need the external symbols.
+ const int sym_size = This::sym_size;
+ const unsigned int loccount = symtabshdr.get_sh_info();
+ this->local_symbol_count_ = loccount;
+ off_t locsize = loccount * sym_size;
+ off_t extoff = symtabshdr.get_sh_offset() + locsize;
+ off_t extsize = symtabshdr.get_sh_size() - locsize;
// Read the symbol table.
- File_view* fvsymtab = this->get_lasting_view(symtabshdr.get_sh_offset(),
- symtabshdr.get_sh_size());
+ File_view* fvsymtab = this->get_lasting_view(extoff, extsize);
// Read the section header for the symbol names.
- unsigned int strtab_shnum = symtabshdr.get_sh_link();
- if (strtab_shnum == 0 || strtab_shnum >= this->shnum_)
+ unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ if (strtab_shndx >= this->shnum())
{
fprintf(stderr, _("%s: %s: invalid symbol table name index: %u\n"),
- program_name, this->name().c_str(), strtab_shnum);
+ program_name, this->name().c_str(), strtab_shndx);
gold_exit(false);
}
- off_t strtabshdroff = this->shoff_ + (strtab_shnum * shdr_size);
- const unsigned char *pstrtabshdr = this->get_view(strtabshdroff, shdr_size);
- elfcpp::Shdr<size, big_endian> strtabshdr(pstrtabshdr);
+ typename This::Shdr strtabshdr(pshdrs + strtab_shndx * This::shdr_size);
if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB)
{
fprintf(stderr,
File_view* fvstrtab = this->get_lasting_view(strtabshdr.get_sh_offset(),
strtabshdr.get_sh_size());
- Read_symbols_data ret;
- ret.symbols = fvsymtab;
- ret.symbols_size = symtabshdr.get_sh_size();
- ret.symbol_names = fvstrtab;
- ret.symbol_names_size = strtabshdr.get_sh_size();
+ sd->symbols = fvsymtab;
+ sd->symbols_size = extsize;
+ sd->symbol_names = fvstrtab;
+ sd->symbol_names_size = strtabshdr.get_sh_size();
+}
- return ret;
+// Return whether to include a section group in the link. LAYOUT is
+// used to keep track of which section groups we have already seen.
+// INDEX is the index of the section group and SHDR is the section
+// header. If we do not want to include this group, we set bits in
+// OMIT for each section which should be discarded.
+
+template<int size, bool big_endian>
+bool
+Sized_relobj<size, big_endian>::include_section_group(
+ Layout* layout,
+ unsigned int index,
+ const elfcpp::Shdr<size, big_endian>& shdr,
+ std::vector<bool>* omit)
+{
+ // Read the section contents.
+ const unsigned char* pcon = this->get_view(shdr.get_sh_offset(),
+ shdr.get_sh_size());
+ const elfcpp::Elf_Word* pword =
+ reinterpret_cast<const elfcpp::Elf_Word*>(pcon);
+
+ // The first word contains flags. We only care about COMDAT section
+ // groups. Other section groups are always included in the link
+ // just like ordinary sections.
+ elfcpp::Elf_Word flags = elfcpp::Swap<32, big_endian>::readval(pword);
+ if ((flags & elfcpp::GRP_COMDAT) == 0)
+ return true;
+
+ // 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 use the name of the SHT_GROUP section as the group
+ // signature?
+
+ // 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();
+ 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)
+ {
+ fprintf(stderr, _("%s: %s: section group %u info %u out of range\n"),
+ program_name, this->name().c_str(), index, shdr.get_sh_info());
+ gold_exit(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);
+ elfcpp::Sym<size, big_endian> sym(psym);
+
+ // Read the symbol table names.
+ off_t symnamelen;
+ const unsigned char* psymnamesu;
+ psymnamesu = this->section_contents(symshdr.get_sh_link(), &symnamelen);
+ const char* psymnames = reinterpret_cast<const char*>(psymnamesu);
+
+ // Get the section group signature.
+ if (sym.get_st_name() >= symnamelen)
+ {
+ fprintf(stderr, _("%s: %s: symbol %u name offset %u out of range\n"),
+ program_name, this->name().c_str(), shdr.get_sh_info(),
+ sym.get_st_name());
+ gold_exit(false);
+ }
+
+ const char* 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();
+ }
+
+ // Record this section group, and see whether we've already seen one
+ // with the same signature.
+ if (layout->add_comdat(signature, true))
+ return true;
+
+ // This is a duplicate. We want to discard the sections in this
+ // group.
+ size_t count = shdr.get_sh_size() / sizeof(elfcpp::Elf_Word);
+ for (size_t i = 1; i < count; ++i)
+ {
+ elfcpp::Elf_Word secnum =
+ elfcpp::Swap<32, big_endian>::readval(pword + i);
+ if (secnum >= this->shnum())
+ {
+ fprintf(stderr,
+ _("%s: %s: section %u in section group %u out of range"),
+ program_name, this->name().c_str(), secnum,
+ index);
+ gold_exit(false);
+ }
+ (*omit)[secnum] = true;
+ }
+
+ return false;
+}
+
+// Whether to include a linkonce section in the link. NAME is the
+// name of the section and SHDR is the section header.
+
+// Linkonce sections are a GNU extension implemented in the original
+// GNU linker before section groups were defined. The semantics are
+// that we only include one linkonce section with a given name. The
+// name of a linkonce section is normally .gnu.linkonce.T.SYMNAME,
+// where T is the type of section and SYMNAME is the name of a symbol.
+// In an attempt to make linkonce sections interact well with section
+// groups, we try to identify SYMNAME and use it like a section group
+// signature. We want to block section groups with that signature,
+// but not other linkonce sections with that signature. We also use
+// the full name of the linkonce section as a normal section group
+// signature.
+
+template<int size, bool big_endian>
+bool
+Sized_relobj<size, big_endian>::include_linkonce_section(
+ Layout* layout,
+ const char* name,
+ const elfcpp::Shdr<size, big_endian>&)
+{
+ const char* symname = strrchr(name, '.') + 1;
+ bool include1 = layout->add_comdat(symname, false);
+ bool include2 = layout->add_comdat(name, true);
+ return include1 && include2;
+}
+
+// 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.
+
+template<int size, bool big_endian>
+void
+Sized_relobj<size, big_endian>::do_layout(const General_options& options,
+ Symbol_table* symtab,
+ Layout* layout,
+ Read_symbols_data* sd)
+{
+ const unsigned int shnum = this->shnum();
+ if (shnum == 0)
+ return;
+
+ // Get the section headers.
+ const unsigned char* pshdrs = sd->section_headers->data();
+
+ // Get the section names.
+ const unsigned char* pnamesu = sd->section_names->data();
+ const char* pnames = reinterpret_cast<const char*>(pnamesu);
+
+ std::vector<Map_to_output>& map_sections(this->map_to_output());
+ map_sections.resize(shnum);
+
+ // Keep track of which sections to omit.
+ std::vector<bool> omit(shnum, false);
+
+ // Skip the first, dummy, section.
+ pshdrs += 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)
+ {
+ fprintf(stderr,
+ _("%s: %s: bad section name offset for section %u: %lu\n"),
+ program_name, this->name().c_str(), i,
+ static_cast<unsigned long>(shdr.get_sh_name()));
+ gold_exit(false);
+ }
+
+ const char* name = pnames + shdr.get_sh_name();
+
+ if (this->handle_gnu_warning_section(name, i, symtab))
+ {
+ if (!options.is_relocatable())
+ omit[i] = true;
+ }
+
+ bool discard = omit[i];
+ if (!discard)
+ {
+ if (shdr.get_sh_type() == elfcpp::SHT_GROUP)
+ {
+ if (!this->include_section_group(layout, i, shdr, &omit))
+ discard = true;
+ }
+ else if (Layout::is_linkonce(name))
+ {
+ if (!this->include_linkonce_section(layout, name, shdr))
+ discard = true;
+ }
+ }
+
+ if (discard)
+ {
+ // Do not include this section in the link.
+ map_sections[i].output_section = NULL;
+ continue;
+ }
+
+ off_t offset;
+ Output_section* os = layout->layout(this, i, name, shdr, &offset);
+
+ map_sections[i].output_section = os;
+ map_sections[i].offset = offset;
+ }
+
+ delete sd->section_headers;
+ sd->section_headers = NULL;
+ delete sd->section_names;
+ sd->section_names = NULL;
}
// Add the symbols to the symbol table.
template<int size, bool big_endian>
void
-Sized_object<size, big_endian>::do_add_symbols(Read_symbols_data sd)
+Sized_relobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
+ Read_symbols_data* sd)
{
- if (sd.symbols == NULL)
+ if (sd->symbols == NULL)
{
- assert(sd.symbol_names == NULL);
+ gold_assert(sd->symbol_names == NULL);
return;
}
- int sym_size = elfcpp::Elf_sizes<size>::sym_size;
- const unsigned char* symstart = sd.symbols->data();
- const unsigned char* symend = symstart + sd.symbols_size;
- for (const unsigned char* p = symstart; p < symend; p += sym_size)
+ const int sym_size = This::sym_size;
+ size_t symcount = sd->symbols_size / sym_size;
+ if (symcount * sym_size != sd->symbols_size)
{
- elfcpp::Sym<size, big_endian> sym(p);
+ fprintf(stderr,
+ _("%s: %s: size of symbols is not multiple of symbol size\n"),
+ program_name, this->name().c_str());
+ gold_exit(false);
+ }
+
+ this->symbols_ = new Symbol*[symcount];
+
+ const char* sym_names =
+ reinterpret_cast<const char*>(sd->symbol_names->data());
+ symtab->add_from_relobj(this, sd->symbols->data(), symcount, sym_names,
+ sd->symbol_names_size, this->symbols_);
+
+ delete sd->symbols;
+ sd->symbols = NULL;
+ delete sd->symbol_names;
+ sd->symbol_names = NULL;
+}
+
+// Finalize the local symbols. Here we record the file offset at
+// which they should be output, we add their names to *POOL, and we
+// add their values to THIS->LOCAL_VALUES_ and their indexes in the
+// output symbol table to THIS->LOCAL_INDEXES_. Return the symbol
+// index. This function is always called from the main thread. The
+// actual output of the local symbols will occur in a separate task.
+
+template<int size, bool big_endian>
+unsigned int
+Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
+ off_t off,
+ Stringpool* pool)
+{
+ gold_assert(this->symtab_shndx_ != -1U);
+ if (this->symtab_shndx_ == 0)
+ {
+ // This object has no symbols. Weird but legal.
+ return index;
+ }
+
+ gold_assert(off == static_cast<off_t>(align_address(off, size >> 3)));
+
+ this->local_symbol_offset_ = off;
+
+ // Read the symbol table section header.
+ const unsigned int symtab_shndx = this->symtab_shndx_;
+ typename This::Shdr symtabshdr(this,
+ this->elf_file_.section_header(symtab_shndx));
+ gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
+
+ // Read the local symbols.
+ const int sym_size = This::sym_size;
+ const unsigned int loccount = this->local_symbol_count_;
+ 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);
+
+ this->local_values_.resize(loccount);
+ this->local_indexes_.resize(loccount);
+
+ // Read the symbol names.
+ const unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ off_t strtab_size;
+ const unsigned char* pnamesu = this->section_contents(strtab_shndx,
+ &strtab_size);
+ const char* pnames = reinterpret_cast<const char*>(pnamesu);
+
+ // Loop over the local symbols.
+
+ const std::vector<Map_to_output>& mo(this->map_to_output());
+ unsigned int shnum = this->shnum();
+ unsigned int count = 0;
+ // Skip the first, dummy, symbol.
+ psyms += sym_size;
+ for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
+ {
+ elfcpp::Sym<size, big_endian> sym(psyms);
+
+ unsigned int shndx = sym.get_st_shndx();
- unsigned int nameoff = sym.get_st_name();
- if (nameoff >= sd.symbol_names_size)
+ if (shndx >= elfcpp::SHN_LORESERVE)
+ {
+ if (shndx == elfcpp::SHN_ABS)
+ this->local_values_[i] = sym.get_st_value();
+ else
+ {
+ // FIXME: Handle SHN_XINDEX.
+ fprintf(stderr,
+ _("%s: %s: unknown section index %u "
+ "for local symbol %u\n"),
+ program_name, this->name().c_str(), shndx, i);
+ gold_exit(false);
+ }
+ }
+ else
+ {
+ if (shndx >= shnum)
+ {
+ fprintf(stderr,
+ _("%s: %s: local symbol %u section index %u "
+ "out of range\n"),
+ program_name, this->name().c_str(), i, shndx);
+ gold_exit(false);
+ }
+
+ if (mo[shndx].output_section == NULL)
+ {
+ this->local_values_[i] = 0;
+ this->local_indexes_[i] = -1U;
+ continue;
+ }
+
+ this->local_values_[i] = (mo[shndx].output_section->address()
+ + mo[shndx].offset
+ + sym.get_st_value());
+ }
+
+ // Decide whether this symbol should go into the output file.
+
+ if (sym.get_st_type() == elfcpp::STT_SECTION)
+ {
+ this->local_indexes_[i] = -1U;
+ continue;
+ }
+
+ if (sym.get_st_name() >= strtab_size)
{
fprintf(stderr,
- _("%s: %s: invalid symbol name offset %u for symbol %d\n"),
- program_name, this->name().c_str(), nameoff,
- (p - symstart) / sym_size);
+ _("%s: %s: local symbol %u section name "
+ "out of range: %u >= %u\n"),
+ program_name, this->name().c_str(),
+ i, sym.get_st_name(),
+ static_cast<unsigned int>(strtab_size));
gold_exit(false);
}
- const unsigned char* name = sd.symbol_names->data() + nameoff;
- printf("%s\n", name);
+
+ const char* name = pnames + sym.get_st_name();
+ pool->add(name, NULL);
+ this->local_indexes_[i] = index;
+ ++index;
+ off += sym_size;
+ ++count;
}
+
+ this->output_local_symbol_count_ = count;
+
+ return index;
+}
+
+// Write out the local symbols.
+
+template<int size, bool big_endian>
+void
+Sized_relobj<size, big_endian>::write_local_symbols(Output_file* of,
+ const Stringpool* sympool)
+{
+ gold_assert(this->symtab_shndx_ != -1U);
+ if (this->symtab_shndx_ == 0)
+ {
+ // This object has no symbols. Weird but legal.
+ return;
+ }
+
+ // Read the symbol table section header.
+ const unsigned int symtab_shndx = this->symtab_shndx_;
+ typename This::Shdr symtabshdr(this,
+ this->elf_file_.section_header(symtab_shndx));
+ gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
+ const unsigned int loccount = this->local_symbol_count_;
+ gold_assert(loccount == symtabshdr.get_sh_info());
+
+ // Read the local symbols.
+ 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);
+
+ // Read the symbol names.
+ const unsigned int strtab_shndx = symtabshdr.get_sh_link();
+ off_t strtab_size;
+ const unsigned char* pnamesu = this->section_contents(strtab_shndx,
+ &strtab_size);
+ const char* pnames = reinterpret_cast<const char*>(pnamesu);
+
+ // Get a view into the output file.
+ off_t output_size = this->output_local_symbol_count_ * sym_size;
+ unsigned char* oview = of->get_output_view(this->local_symbol_offset_,
+ output_size);
+
+ const std::vector<Map_to_output>& mo(this->map_to_output());
+
+ gold_assert(this->local_values_.size() == loccount);
+ gold_assert(this->local_indexes_.size() == loccount);
+
+ unsigned char* ov = oview;
+ psyms += sym_size;
+ for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
+ {
+ elfcpp::Sym<size, big_endian> isym(psyms);
+
+ if (this->local_indexes_[i] == -1U)
+ continue;
+ gold_assert(this->local_indexes_[i] != 0);
+
+ unsigned int st_shndx = isym.get_st_shndx();
+ if (st_shndx < elfcpp::SHN_LORESERVE)
+ {
+ gold_assert(st_shndx < mo.size());
+ if (mo[st_shndx].output_section == NULL)
+ continue;
+ st_shndx = mo[st_shndx].output_section->out_shndx();
+ }
+
+ elfcpp::Sym_write<size, big_endian> osym(ov);
+
+ gold_assert(isym.get_st_name() < strtab_size);
+ const char* name = pnames + isym.get_st_name();
+ osym.put_st_name(sympool->get_offset(name));
+ osym.put_st_value(this->local_values_[i]);
+ osym.put_st_size(isym.get_st_size());
+ osym.put_st_info(isym.get_st_info());
+ osym.put_st_other(isym.get_st_other());
+ osym.put_st_shndx(st_shndx);
+
+ ov += sym_size;
+ }
+
+ gold_assert(ov - oview == output_size);
+
+ of->write_output_view(this->local_symbol_offset_, output_size, oview);
+}
+
+// Input_objects methods.
+
+// Add a regular relocatable object to the list. Return false if this
+// object should be ignored.
+
+bool
+Input_objects::add_object(Object* obj)
+{
+ if (!obj->is_dynamic())
+ this->relobj_list_.push_back(static_cast<Relobj*>(obj));
+ else
+ {
+ // See if this is a duplicate SONAME.
+ Dynobj* dynobj = static_cast<Dynobj*>(obj);
+
+ std::pair<Unordered_set<std::string>::iterator, bool> ins =
+ this->sonames_.insert(dynobj->soname());
+ if (!ins.second)
+ {
+ // We have already seen a dynamic object with this soname.
+ return false;
+ }
+
+ this->dynobj_list_.push_back(dynobj);
+ }
+
+ Target* target = obj->target();
+ if (this->target_ == NULL)
+ this->target_ = target;
+ else if (this->target_ != target)
+ {
+ fprintf(stderr, "%s: %s: incompatible target\n",
+ program_name, obj->name().c_str());
+ gold_exit(false);
+ }
+
+ return true;
+}
+
+// Relocate_info methods.
+
+// Return a string describing the location of a relocation. This is
+// only used in error messages.
+
+template<int size, bool big_endian>
+std::string
+Relocate_info<size, big_endian>::location(size_t relnum, off_t) const
+{
+ std::string ret(this->object->name());
+ ret += ": reloc ";
+ char buf[100];
+ snprintf(buf, sizeof buf, "%zu", relnum);
+ ret += buf;
+ ret += " in reloc section ";
+ snprintf(buf, sizeof buf, "%u", this->reloc_shndx);
+ ret += buf;
+ ret += " (" + this->object->section_name(this->reloc_shndx);
+ ret += ") for section ";
+ snprintf(buf, sizeof buf, "%u", this->data_shndx);
+ ret += buf;
+ ret += " (" + this->object->section_name(this->data_shndx) + ")";
+ return ret;
}
} // End namespace gold.
off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
{
int et = ehdr.get_e_type();
- if (et != elfcpp::ET_REL && et != elfcpp::ET_DYN)
+ if (et == elfcpp::ET_REL)
{
- fprintf(stderr, "%s: %s: unsupported ELF type %d\n",
- program_name, name.c_str(), static_cast<int>(et));
- gold_exit(false);
+ Sized_relobj<size, big_endian>* obj =
+ new Sized_relobj<size, big_endian>(name, input_file, offset, ehdr);
+ obj->setup(ehdr);
+ return obj;
}
-
- if (et == elfcpp::ET_REL)
+ else if (et == elfcpp::ET_DYN)
{
- Sized_object<size, big_endian>* obj =
- new Sized_object<size, big_endian>(name, input_file, offset, ehdr);
+ Sized_dynobj<size, big_endian>* obj =
+ new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
obj->setup(ehdr);
return obj;
}
else
{
- // elfcpp::ET_DYN
- fprintf(stderr, _("%s: %s: dynamic objects are not yet supported\n"),
- program_name, name.c_str());
+ fprintf(stderr, _("%s: %s: unsupported ELF file type %d\n"),
+ program_name, name.c_str(), et);
gold_exit(false);
-// Sized_dynobj<size, big_endian>* obj =
-// new Sized_dynobj<size, big_endian>(this->input_.name(), input_file,
-// offset, ehdr);
-// obj->setup(ehdr);
-// return obj;
}
}
// script to restrict this to only the ones for implemented targets.
template
-class Sized_object<32, false>;
+class Sized_relobj<32, false>;
+
+template
+class Sized_relobj<32, true>;
+
+template
+class Sized_relobj<64, false>;
+
+template
+class Sized_relobj<64, true>;
+
+template
+struct Relocate_info<32, false>;
template
-class Sized_object<32, true>;
+struct Relocate_info<32, true>;
template
-class Sized_object<64, false>;
+struct Relocate_info<64, false>;
template
-class Sized_object<64, true>;
+struct Relocate_info<64, true>;
} // End namespace gold.