Output_section_headers::Output_section_headers(
const Layout* layout,
const Layout::Segment_list* segment_list,
+ const Layout::Section_list* section_list,
const Layout::Section_list* unattached_section_list,
const Stringpool* secnamepool)
: layout_(layout),
segment_list_(segment_list),
+ section_list_(section_list),
unattached_section_list_(unattached_section_list),
secnamepool_(secnamepool)
{
// Count all the sections. Start with 1 for the null section.
off_t count = 1;
- for (Layout::Segment_list::const_iterator p = segment_list->begin();
- p != segment_list->end();
- ++p)
- if ((*p)->type() == elfcpp::PT_LOAD)
- count += (*p)->output_section_count();
+ if (!parameters->output_is_object())
+ {
+ for (Layout::Segment_list::const_iterator p = segment_list->begin();
+ p != segment_list->end();
+ ++p)
+ if ((*p)->type() == elfcpp::PT_LOAD)
+ count += (*p)->output_section_count();
+ }
+ else
+ {
+ for (Layout::Section_list::const_iterator p = section_list->begin();
+ p != section_list->end();
+ ++p)
+ if (((*p)->flags() & elfcpp::SHF_ALLOC) != 0)
+ ++count;
+ }
count += unattached_section_list->size();
const int size = parameters->get_size();
v += shdr_size;
- unsigned shndx = 1;
- for (Layout::Segment_list::const_iterator p = this->segment_list_->begin();
- p != this->segment_list_->end();
- ++p)
- v = (*p)->write_section_headers SELECT_SIZE_ENDIAN_NAME(size, big_endian) (
- this->layout_, this->secnamepool_, v, &shndx
- SELECT_SIZE_ENDIAN(size, big_endian));
+ unsigned int shndx = 1;
+ if (!parameters->output_is_object())
+ {
+ for (Layout::Segment_list::const_iterator p =
+ this->segment_list_->begin();
+ p != this->segment_list_->end();
+ ++p)
+ v = (*p)->write_section_headers<size, big_endian>(this->layout_,
+ this->secnamepool_,
+ v,
+ &shndx);
+ }
+ else
+ {
+ for (Layout::Section_list::const_iterator p =
+ this->section_list_->begin();
+ p != this->section_list_->end();
+ ++p)
+ {
+ // We do unallocated sections below, except that group
+ // sections have to come first.
+ if (((*p)->flags() & elfcpp::SHF_ALLOC) == 0
+ && (*p)->type() != elfcpp::SHT_GROUP)
+ continue;
+ gold_assert(shndx == (*p)->out_shndx());
+ elfcpp::Shdr_write<size, big_endian> oshdr(v);
+ (*p)->write_header(this->layout_, this->secnamepool_, &oshdr);
+ v += shdr_size;
+ ++shndx;
+ }
+ }
+
for (Layout::Section_list::const_iterator p =
this->unattached_section_list_->begin();
p != this->unattached_section_list_->end();
++p)
{
+ // For a relocatable link, we did unallocated group sections
+ // above, since they have to come first.
+ if ((*p)->type() == elfcpp::SHT_GROUP
+ && parameters->output_is_object())
+ continue;
gold_assert(shndx == (*p)->out_shndx());
elfcpp::Shdr_write<size, big_endian> oshdr(v);
(*p)->write_header(this->layout_, this->secnamepool_, &oshdr);
oehdr.put_e_entry(this->entry<size>());
- oehdr.put_e_phoff(this->segment_header_->offset());
+ if (this->segment_header_ == NULL)
+ oehdr.put_e_phoff(0);
+ else
+ oehdr.put_e_phoff(this->segment_header_->offset());
+
oehdr.put_e_shoff(this->section_header_->offset());
// FIXME: The target needs to set the flags.
oehdr.put_e_flags(0);
oehdr.put_e_ehsize(elfcpp::Elf_sizes<size>::ehdr_size);
- oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size);
- oehdr.put_e_phnum(this->segment_header_->data_size()
- / elfcpp::Elf_sizes<size>::phdr_size);
+
+ if (this->segment_header_ == NULL)
+ {
+ oehdr.put_e_phentsize(0);
+ oehdr.put_e_phnum(0);
+ }
+ else
+ {
+ oehdr.put_e_phentsize(elfcpp::Elf_sizes<size>::phdr_size);
+ oehdr.put_e_phnum(this->segment_header_->data_size()
+ / elfcpp::Elf_sizes<size>::phdr_size);
+ }
+
oehdr.put_e_shentsize(elfcpp::Elf_sizes<size>::shdr_size);
oehdr.put_e_shnum(this->section_header_->data_size()
/ elfcpp::Elf_sizes<size>::shdr_size);
Address address,
bool is_relative)
: address_(address), local_sym_index_(GSYM_CODE), type_(type),
- is_relative_(is_relative), shndx_(INVALID_CODE)
+ is_relative_(is_relative), is_section_symbol_(false), shndx_(INVALID_CODE)
{
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.gsym = gsym;
this->u2_.od = od;
- if (dynamic && !is_relative)
- gsym->set_needs_dynsym_entry();
+ if (dynamic)
+ this->set_needs_dynsym_index();
}
template<bool dynamic, int size, bool big_endian>
Address address,
bool is_relative)
: address_(address), local_sym_index_(GSYM_CODE), type_(type),
- is_relative_(is_relative), shndx_(shndx)
+ is_relative_(is_relative), is_section_symbol_(false), shndx_(shndx)
{
gold_assert(shndx != INVALID_CODE);
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.gsym = gsym;
this->u2_.relobj = relobj;
- if (dynamic && !is_relative)
- gsym->set_needs_dynsym_entry();
+ if (dynamic)
+ this->set_needs_dynsym_index();
}
// A reloc against a local symbol.
unsigned int type,
Output_data* od,
Address address,
- bool is_relative)
+ bool is_relative,
+ bool is_section_symbol)
: address_(address), local_sym_index_(local_sym_index), type_(type),
- is_relative_(is_relative), shndx_(INVALID_CODE)
+ is_relative_(is_relative), is_section_symbol_(is_section_symbol),
+ shndx_(INVALID_CODE)
{
gold_assert(local_sym_index != GSYM_CODE
&& local_sym_index != INVALID_CODE);
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.relobj = relobj;
this->u2_.od = od;
- if (dynamic && !is_relative)
- relobj->set_needs_output_dynsym_entry(local_sym_index);
+ if (dynamic)
+ this->set_needs_dynsym_index();
}
template<bool dynamic, int size, bool big_endian>
unsigned int type,
unsigned int shndx,
Address address,
- bool is_relative)
+ bool is_relative,
+ bool is_section_symbol)
: address_(address), local_sym_index_(local_sym_index), type_(type),
- is_relative_(is_relative), shndx_(shndx)
+ is_relative_(is_relative), is_section_symbol_(is_section_symbol),
+ shndx_(shndx)
{
gold_assert(local_sym_index != GSYM_CODE
&& local_sym_index != INVALID_CODE);
gold_assert(shndx != INVALID_CODE);
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.relobj = relobj;
this->u2_.relobj = relobj;
- if (dynamic && !is_relative)
- relobj->set_needs_output_dynsym_entry(local_sym_index);
+ if (dynamic)
+ this->set_needs_dynsym_index();
}
// A reloc against the STT_SECTION symbol of an output section.
Output_data* od,
Address address)
: address_(address), local_sym_index_(SECTION_CODE), type_(type),
- is_relative_(false), shndx_(INVALID_CODE)
+ is_relative_(false), is_section_symbol_(true), shndx_(INVALID_CODE)
{
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.os = os;
this->u2_.od = od;
if (dynamic)
- os->set_needs_dynsym_index();
+ this->set_needs_dynsym_index();
+ else
+ os->set_needs_symtab_index();
}
template<bool dynamic, int size, bool big_endian>
unsigned int shndx,
Address address)
: address_(address), local_sym_index_(SECTION_CODE), type_(type),
- is_relative_(false), shndx_(shndx)
+ is_relative_(false), is_section_symbol_(true), shndx_(shndx)
{
gold_assert(shndx != INVALID_CODE);
+ // this->type_ is a bitfield; make sure TYPE fits.
+ gold_assert(this->type_ == type);
this->u1_.os = os;
this->u2_.relobj = relobj;
if (dynamic)
- os->set_needs_dynsym_index();
+ this->set_needs_dynsym_index();
+ else
+ os->set_needs_symtab_index();
+}
+
+// Record that we need a dynamic symbol index for this relocation.
+
+template<bool dynamic, int size, bool big_endian>
+void
+Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
+set_needs_dynsym_index()
+{
+ if (this->is_relative_)
+ return;
+ switch (this->local_sym_index_)
+ {
+ case INVALID_CODE:
+ gold_unreachable();
+
+ case GSYM_CODE:
+ this->u1_.gsym->set_needs_dynsym_entry();
+ break;
+
+ case SECTION_CODE:
+ this->u1_.os->set_needs_dynsym_index();
+ break;
+
+ case 0:
+ break;
+
+ default:
+ {
+ const unsigned int lsi = this->local_sym_index_;
+ if (!this->is_section_symbol_)
+ this->u1_.relobj->set_needs_output_dynsym_entry(lsi);
+ else
+ {
+ section_offset_type dummy;
+ Output_section* os = this->u1_.relobj->output_section(lsi, &dummy);
+ gold_assert(os != NULL);
+ os->set_needs_dynsym_index();
+ }
+ }
+ break;
+ }
}
// Get the symbol index of a relocation.
break;
default:
- if (dynamic)
- index = this->u1_.relobj->dynsym_index(this->local_sym_index_);
- else
- index = this->u1_.relobj->symtab_index(this->local_sym_index_);
+ {
+ const unsigned int lsi = this->local_sym_index_;
+ if (!this->is_section_symbol_)
+ {
+ if (dynamic)
+ index = this->u1_.relobj->dynsym_index(lsi);
+ else
+ index = this->u1_.relobj->symtab_index(lsi);
+ }
+ else
+ {
+ section_offset_type dummy;
+ Output_section* os = this->u1_.relobj->output_section(lsi, &dummy);
+ gold_assert(os != NULL);
+ if (dynamic)
+ index = os->dynsym_index();
+ else
+ index = os->symtab_index();
+ }
+ }
break;
}
gold_assert(index != -1U);
return index;
}
+// For a local section symbol, get the section offset of the input
+// section within the output section.
+
+template<bool dynamic, int size, bool big_endian>
+section_offset_type
+Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
+ local_section_offset() const
+{
+ const unsigned int lsi = this->local_sym_index_;
+ section_offset_type offset;
+ Output_section* os = this->u1_.relobj->output_section(lsi, &offset);
+ gold_assert(os != NULL);
+ return offset;
+}
+
// Write out the offset and info fields of a Rel or Rela relocation
// entry.
elfcpp::Rela_write<size, big_endian> orel(pov);
this->rel_.write_rel(&orel);
Addend addend = this->addend_;
- if (rel_.is_relative())
- addend += rel_.symbol_value();
+ if (this->rel_.is_relative())
+ addend += this->rel_.symbol_value();
+ if (this->rel_.is_local_section_symbol())
+ addend += this->rel_.local_section_offset();
orel.put_r_addend(addend);
}
this->relocs_.clear();
}
+// Class Output_relocatable_relocs.
+
+template<int sh_type, int size, bool big_endian>
+void
+Output_relocatable_relocs<sh_type, size, big_endian>::set_final_data_size()
+{
+ this->set_data_size(this->rr_->output_reloc_count()
+ * Reloc_types<sh_type, size, big_endian>::reloc_size);
+}
+
+// class Output_data_group.
+
+template<int size, bool big_endian>
+Output_data_group<size, big_endian>::Output_data_group(
+ Sized_relobj<size, big_endian>* relobj,
+ section_size_type entry_count,
+ const elfcpp::Elf_Word* contents)
+ : Output_section_data(entry_count * 4, 4),
+ relobj_(relobj)
+{
+ this->flags_ = elfcpp::Swap<32, big_endian>::readval(contents);
+ for (section_size_type i = 1; i < entry_count; ++i)
+ {
+ unsigned int shndx = elfcpp::Swap<32, big_endian>::readval(contents + i);
+ this->input_sections_.push_back(shndx);
+ }
+}
+
+// Write out the section group, which means translating the section
+// indexes to apply to the output file.
+
+template<int size, bool big_endian>
+void
+Output_data_group<size, big_endian>::do_write(Output_file* of)
+{
+ const off_t off = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(off, oview_size);
+
+ elfcpp::Elf_Word* contents = reinterpret_cast<elfcpp::Elf_Word*>(oview);
+ elfcpp::Swap<32, big_endian>::writeval(contents, this->flags_);
+ ++contents;
+
+ for (std::vector<unsigned int>::const_iterator p =
+ this->input_sections_.begin();
+ p != this->input_sections_.end();
+ ++p, ++contents)
+ {
+ section_offset_type dummy;
+ Output_section* os = this->relobj_->output_section(*p, &dummy);
+
+ unsigned int output_shndx;
+ if (os != NULL)
+ output_shndx = os->out_shndx();
+ else
+ {
+ this->relobj_->error(_("section group retained but "
+ "group element discarded"));
+ output_shndx = 0;
+ }
+
+ elfcpp::Swap<32, big_endian>::writeval(contents, output_shndx);
+ }
+
+ size_t wrote = reinterpret_cast<unsigned char*>(contents) - oview;
+ gold_assert(wrote == oview_size);
+
+ of->write_output_view(off, oview_size, oview);
+
+ // We no longer need this information.
+ this->input_sections_.clear();
+}
+
// Output_data_got::Got_entry methods.
// Write out the entry.
link_section_(NULL),
link_(0),
info_section_(NULL),
+ info_symndx_(NULL),
info_(0),
type_(type),
flags_(flags),
requires_postprocessing_(false),
found_in_sections_clause_(false),
has_load_address_(false),
+ info_uses_section_index_(false),
tls_offset_(0)
{
// An unallocated section has no address. Forcing this means that
{
oshdr->put_sh_name(secnamepool->get_offset(this->name_));
oshdr->put_sh_type(this->type_);
- oshdr->put_sh_flags(this->flags_);
+
+ elfcpp::Elf_Xword flags = this->flags_;
+ if (this->info_section_ != NULL && this->info_uses_section_index_)
+ flags |= elfcpp::SHF_INFO_LINK;
+ oshdr->put_sh_flags(flags);
+
oshdr->put_sh_addr(this->address());
oshdr->put_sh_offset(this->offset());
oshdr->put_sh_size(this->data_size());
oshdr->put_sh_link(layout->dynsym_section()->out_shndx());
else
oshdr->put_sh_link(this->link_);
+
+ elfcpp::Elf_Word info;
if (this->info_section_ != NULL)
- oshdr->put_sh_info(this->info_section_->out_shndx());
+ {
+ if (this->info_uses_section_index_)
+ info = this->info_section_->out_shndx();
+ else
+ info = this->info_section_->symtab_index();
+ }
+ else if (this->info_symndx_ != NULL)
+ info = this->info_symndx_->symtab_index();
else
- oshdr->put_sh_info(this->info_);
+ info = this->info_;
+ oshdr->put_sh_info(info);
+
oshdr->put_sh_addralign(this->addralign_);
oshdr->put_sh_entsize(this->entsize_);
}
return count;
}
+// Return the section attached to the list segment with the lowest
+// load address. This is used when handling a PHDRS clause in a
+// linker script.
+
+Output_section*
+Output_segment::section_with_lowest_load_address() const
+{
+ Output_section* found = NULL;
+ uint64_t found_lma = 0;
+ this->lowest_load_address_in_list(&this->output_data_, &found, &found_lma);
+
+ Output_section* found_data = found;
+ this->lowest_load_address_in_list(&this->output_bss_, &found, &found_lma);
+ if (found != found_data && found_data != NULL)
+ {
+ gold_error(_("nobits section %s may not precede progbits section %s "
+ "in same segment"),
+ found->name(), found_data->name());
+ return NULL;
+ }
+
+ return found;
+}
+
+// Look through a list for a section with a lower load address.
+
+void
+Output_segment::lowest_load_address_in_list(const Output_data_list* pdl,
+ Output_section** found,
+ uint64_t* found_lma) const
+{
+ for (Output_data_list::const_iterator p = pdl->begin();
+ p != pdl->end();
+ ++p)
+ {
+ if (!(*p)->is_section())
+ continue;
+ Output_section* os = static_cast<Output_section*>(*p);
+ uint64_t lma = (os->has_load_address()
+ ? os->load_address()
+ : os->address());
+ if (*found == NULL || lma < *found_lma)
+ {
+ *found = os;
+ *found_lma = lma;
+ }
+ }
+}
+
// Write the segment data into *OPHDR.
template<int size, bool big_endian>
o_(-1),
file_size_(0),
base_(NULL),
- map_is_anonymous_(false)
+ map_is_anonymous_(false),
+ is_temporary_(false)
{
}
// to improve the odds for open().
// We let the name "-" mean "stdout"
- if (strcmp(this->name_, "-") == 0)
- this->o_ = STDOUT_FILENO;
- else
+ if (!this->is_temporary_)
{
- struct stat s;
- if (::stat(this->name_, &s) == 0 && s.st_size != 0)
- unlink_if_ordinary(this->name_);
-
- int mode = parameters->output_is_object() ? 0666 : 0777;
- int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode);
- if (o < 0)
- gold_fatal(_("%s: open: %s"), this->name_, strerror(errno));
- this->o_ = o;
+ if (strcmp(this->name_, "-") == 0)
+ this->o_ = STDOUT_FILENO;
+ else
+ {
+ struct stat s;
+ if (::stat(this->name_, &s) == 0 && s.st_size != 0)
+ unlink_if_ordinary(this->name_);
+
+ int mode = parameters->output_is_object() ? 0666 : 0777;
+ int o = ::open(this->name_, O_RDWR | O_CREAT | O_TRUNC, mode);
+ if (o < 0)
+ gold_fatal(_("%s: open: %s"), this->name_, strerror(errno));
+ this->o_ = o;
+ }
}
this->map();
struct stat statbuf;
if (o == STDOUT_FILENO || o == STDERR_FILENO
|| ::fstat(o, &statbuf) != 0
- || !S_ISREG(statbuf.st_mode))
+ || !S_ISREG(statbuf.st_mode)
+ || this->is_temporary_)
{
this->map_is_anonymous_ = true;
base = ::mmap(NULL, this->file_size_, PROT_READ | PROT_WRITE,
Output_file::close()
{
// If the map isn't file-backed, we need to write it now.
- if (this->map_is_anonymous_)
+ if (this->map_is_anonymous_ && !this->is_temporary_)
{
size_t bytes_to_write = this->file_size_;
while (bytes_to_write > 0)
this->unmap();
// We don't close stdout or stderr
- if (this->o_ != STDOUT_FILENO && this->o_ != STDERR_FILENO)
+ if (this->o_ != STDOUT_FILENO
+ && this->o_ != STDERR_FILENO
+ && !this->is_temporary_)
if (::close(this->o_) < 0)
gold_error(_("%s: close: %s"), this->name_, strerror(errno));
this->o_ = -1;
class Output_data_reloc<elfcpp::SHT_RELA, true, 64, true>;
#endif
+#ifdef HAVE_TARGET_32_LITTLE
+template
+class Output_relocatable_relocs<elfcpp::SHT_REL, 32, false>;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+class Output_relocatable_relocs<elfcpp::SHT_REL, 32, true>;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+class Output_relocatable_relocs<elfcpp::SHT_REL, 64, false>;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+class Output_relocatable_relocs<elfcpp::SHT_REL, 64, true>;
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, false>;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+class Output_relocatable_relocs<elfcpp::SHT_RELA, 32, true>;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, false>;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+class Output_relocatable_relocs<elfcpp::SHT_RELA, 64, true>;
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+class Output_data_group<32, false>;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+class Output_data_group<32, true>;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+class Output_data_group<64, false>;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+class Output_data_group<64, true>;
+#endif
+
#ifdef HAVE_TARGET_32_LITTLE
template
class Output_data_got<32, false>;
projects / binutils-gdb.git / blobdiff