// output.cc -- manage the output file for gold
-// Copyright (C) 2006-2015 Free Software Foundation, Inc.
+// Copyright (C) 2006-2020 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
static int
gold_fallocate(int o, off_t offset, off_t len)
{
+ if (len <= 0)
+ return 0;
+
#ifdef HAVE_POSIX_FALLOCATE
if (parameters->options().posix_fallocate())
- return ::posix_fallocate(o, offset, len);
+ {
+ int err = ::posix_fallocate(o, offset, len);
+ if (err != EINVAL && err != ENOSYS && err != EOPNOTSUPP)
+ return err;
+ }
#endif // defined(HAVE_POSIX_FALLOCATE)
+
#ifdef HAVE_FALLOCATE
- if (::fallocate(o, 0, offset, len) == 0)
- return 0;
+ {
+ int err = ::fallocate(o, 0, offset, len);
+ if (err != EINVAL && err != ENOSYS && err != EOPNOTSUPP)
+ return err;
+ }
#endif // defined(HAVE_FALLOCATE)
+
if (::ftruncate(o, offset + len) < 0)
return errno;
return 0;
os->set_should_link_to_dynsym();
}
+// Standard relocation writer, which just calls Output_reloc::write().
+
+template<int sh_type, bool dynamic, int size, bool big_endian>
+struct Output_reloc_writer
+{
+ typedef Output_reloc<sh_type, dynamic, size, big_endian> Output_reloc_type;
+ typedef std::vector<Output_reloc_type> Relocs;
+
+ static void
+ write(typename Relocs::const_iterator p, unsigned char* pov)
+ { p->write(pov); }
+};
+
// Write out relocation data.
template<int sh_type, bool dynamic, int size, bool big_endian>
Output_data_reloc_base<sh_type, dynamic, size, big_endian>::do_write(
Output_file* of)
{
- const off_t off = this->offset();
- const off_t oview_size = this->data_size();
- unsigned char* const oview = of->get_output_view(off, oview_size);
-
- if (this->sort_relocs())
- {
- gold_assert(dynamic);
- std::sort(this->relocs_.begin(), this->relocs_.end(),
- Sort_relocs_comparison());
- }
-
- unsigned char* pov = oview;
- for (typename Relocs::const_iterator p = this->relocs_.begin();
- p != this->relocs_.end();
- ++p)
- {
- p->write(pov);
- pov += reloc_size;
- }
-
- gold_assert(pov - oview == oview_size);
-
- of->write_output_view(off, oview_size, oview);
-
- // We no longer need the relocation entries.
- this->relocs_.clear();
+ typedef Output_reloc_writer<sh_type, dynamic, size, big_endian> Writer;
+ this->do_write_generic<Writer>(of);
}
// Class Output_relocatable_relocs.
val = parameters->target().plt_address_for_local(object, lsi);
else
{
- uint64_t lval = object->local_symbol_value(lsi, 0);
+ uint64_t lval = object->local_symbol_value(lsi, this->addend_);
val = convert_types<Valtype, uint64_t>(lval);
if (this->use_plt_or_tls_offset_ && is_tls)
val += parameters->target().tls_offset_for_local(object, lsi,
return true;
}
+// Add an entry for a local symbol plus ADDEND to the GOT. This returns
+// true if this is a new GOT entry, false if the symbol already has a GOT
+// entry.
+
+template<int got_size, bool big_endian>
+bool
+Output_data_got<got_size, big_endian>::add_local(
+ Relobj* object,
+ unsigned int symndx,
+ unsigned int got_type,
+ uint64_t addend)
+{
+ if (object->local_has_got_offset(symndx, got_type, addend))
+ return false;
+
+ unsigned int got_offset = this->add_got_entry(Got_entry(object, symndx,
+ false, addend));
+ object->set_local_got_offset(symndx, got_type, got_offset, addend);
+ return true;
+}
+
// Like add_local, but use the PLT offset.
template<int got_size, bool big_endian>
rel_dyn->add_local_generic(object, symndx, r_type, this, got_offset, 0);
}
+// Add an entry for a local symbol plus ADDEND to the GOT, and add a dynamic
+// relocation of type R_TYPE for the GOT entry.
+
+template<int got_size, bool big_endian>
+void
+Output_data_got<got_size, big_endian>::add_local_with_rel(
+ Relobj* object,
+ unsigned int symndx,
+ unsigned int got_type,
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type, uint64_t addend)
+{
+ if (object->local_has_got_offset(symndx, got_type, addend))
+ return;
+
+ unsigned int got_offset = this->add_got_entry(Got_entry());
+ object->set_local_got_offset(symndx, got_type, got_offset, addend);
+ rel_dyn->add_local_generic(object, symndx, r_type, this, got_offset,
+ addend);
+}
+
// Add a pair of entries for a local symbol to the GOT, and add
// a dynamic relocation of type R_TYPE using the section symbol of
// the output section to which input section SHNDX maps, on the first.
rel_dyn->add_output_section_generic(os, r_type, this, got_offset, 0);
}
+// Add a pair of entries for a local symbol plus ADDEND to the GOT, and add
+// a dynamic relocation of type R_TYPE using the section symbol of
+// the output section to which input section SHNDX maps, on the first.
+// The first got entry will have a value of zero, the second the
+// value of the local symbol.
+template<int got_size, bool big_endian>
+void
+Output_data_got<got_size, big_endian>::add_local_pair_with_rel(
+ Relobj* object,
+ unsigned int symndx,
+ unsigned int shndx,
+ unsigned int got_type,
+ Output_data_reloc_generic* rel_dyn,
+ unsigned int r_type, uint64_t addend)
+{
+ if (object->local_has_got_offset(symndx, got_type, addend))
+ return;
+
+ unsigned int got_offset =
+ this->add_got_entry_pair(Got_entry(),
+ Got_entry(object, symndx, false, addend));
+ object->set_local_got_offset(symndx, got_type, got_offset, addend);
+ Output_section* os = object->output_section(shndx);
+ rel_dyn->add_output_section_generic(os, r_type, this, got_offset, addend);
+}
+
// Add a pair of entries for a local symbol to the GOT, and add
// a dynamic relocation of type R_TYPE using STN_UNDEF on the first.
// The first got entry will have a value of zero, the second the
gold_unreachable();
}
+// Get a dynamic entry offset.
+
+unsigned int
+Output_data_dynamic::get_entry_offset(elfcpp::DT tag) const
+{
+ int dyn_size;
+
+ if (parameters->target().get_size() == 32)
+ dyn_size = elfcpp::Elf_sizes<32>::dyn_size;
+ else if (parameters->target().get_size() == 64)
+ dyn_size = elfcpp::Elf_sizes<64>::dyn_size;
+ else
+ gold_unreachable();
+
+ for (size_t i = 0; i < entries_.size(); ++i)
+ if (entries_[i].tag() == tag)
+ return i * dyn_size;
+
+ return -1U;
+}
+
// Set the final data size.
void
lookup_maps_(new Output_section_lookup_maps),
free_list_(),
free_space_fill_(NULL),
- patch_space_(0)
+ patch_space_(0),
+ reloc_section_(NULL)
{
// An unallocated section has no address. Forcing this means that
// we don't need special treatment for symbols defined in debug
unsigned int reloc_shndx,
bool have_sections_script)
{
+ section_size_type input_section_size = shdr.get_sh_size();
+ section_size_type uncompressed_size;
elfcpp::Elf_Xword addralign = shdr.get_sh_addralign();
+ if (object->section_is_compressed(shndx, &uncompressed_size,
+ &addralign))
+ input_section_size = uncompressed_size;
+
if ((addralign & (addralign - 1)) != 0)
{
object->error(_("invalid alignment %lu for section \"%s\""),
}
}
- section_size_type input_section_size = shdr.get_sh_size();
- section_size_type uncompressed_size;
- if (object->section_is_compressed(shndx, &uncompressed_size))
- input_section_size = uncompressed_size;
-
off_t offset_in_section;
if (this->has_fixed_layout())
uint64_t address = this->address();
off_t startoff = this->offset();
- off_t off = startoff + this->first_input_offset_;
+ off_t off = this->first_input_offset_;
for (Input_section_list::iterator p = this->input_sections_.begin();
p != this->input_sections_.end();
++p)
{
off = align_address(off, p->addralign());
- p->set_address_and_file_offset(address + (off - startoff), off,
+ p->set_address_and_file_offset(address + off, startoff + off,
startoff);
off += p->data_size();
}
- data_size = off - startoff;
+ data_size = off;
}
// For full incremental links, we want to allocate some patch space
const Output_section::Input_section_sort_entry& s2) const
{
// Some input section names have special ordering requirements.
- int o1 = Layout::special_ordering_of_input_section(s1.section_name().c_str());
- int o2 = Layout::special_ordering_of_input_section(s2.section_name().c_str());
+ const char *s1_section_name = s1.section_name().c_str();
+ const char *s2_section_name = s2.section_name().c_str();
+ int o1 = Layout::special_ordering_of_input_section(s1_section_name);
+ int o2 = Layout::special_ordering_of_input_section(s2_section_name);
if (o1 != o2)
{
if (o1 < 0)
else
return o1 < o2;
}
+ else if (is_prefix_of(".text.sorted", s1_section_name))
+ return strcmp(s1_section_name, s2_section_name) <= 0;
// Keep input order otherwise.
return s1.index() < s2.index();
if (p->is_input_section()
|| p->is_relaxed_input_section())
{
- Object* obj = (p->is_input_section()
+ Relobj* obj = (p->is_input_section()
? p->relobj()
: p->relaxed_input_section()->relobj());
unsigned int shndx = p->shndx();
this->offset_ = orig_off;
off_t off = 0;
- uint64_t ret;
+ off_t foff = *poff;
+ uint64_t ret = 0;
for (int i = 0; i < static_cast<int>(ORDER_MAX); ++i)
{
if (i == static_cast<int>(ORDER_RELRO_LAST))
{
*poff += last_relro_pad;
+ foff += last_relro_pad;
addr += last_relro_pad;
if (this->output_lists_[i].empty())
{
}
addr = this->set_section_list_addresses(layout, reset,
&this->output_lists_[i],
- addr, poff, pshndx, &in_tls);
- if (i < static_cast<int>(ORDER_SMALL_BSS))
- {
- this->filesz_ = *poff - orig_off;
- off = *poff;
- }
+ addr, poff, &foff, pshndx,
+ &in_tls);
+
+ // FOFF tracks the last offset used for the file image,
+ // and *POFF tracks the last offset used for the memory image.
+ // When not using a linker script, bss sections should all
+ // be processed in the ORDER_SMALL_BSS and later buckets.
+ gold_assert(*poff == foff
+ || i == static_cast<int>(ORDER_TLS_BSS)
+ || i >= static_cast<int>(ORDER_SMALL_BSS)
+ || layout->script_options()->saw_sections_clause());
+
+ this->filesz_ = foff - orig_off;
+ off = foff;
ret = addr;
}
Output_segment::set_section_list_addresses(Layout* layout, bool reset,
Output_data_list* pdl,
uint64_t addr, off_t* poff,
+ off_t* pfoff,
unsigned int* pshndx,
bool* in_tls)
{
off_t maxoff = startoff;
off_t off = startoff;
+ off_t foff = *pfoff;
for (Output_data_list::iterator p = pdl->begin();
p != pdl->end();
++p)
{
+ bool is_bss = (*p)->is_section_type(elfcpp::SHT_NOBITS);
+ bool is_tls = (*p)->is_section_flag_set(elfcpp::SHF_TLS);
+
if (reset)
(*p)->reset_address_and_file_offset();
{
uint64_t align = (*p)->addralign();
- if ((*p)->is_section_flag_set(elfcpp::SHF_TLS))
+ if (is_tls)
{
// Give the first TLS section the alignment of the
// entire TLS segment. Otherwise the TLS segment as a
if (!parameters->incremental_update())
{
+ gold_assert(off == foff || is_bss);
off = align_address(off, align);
- (*p)->set_address_and_file_offset(addr + (off - startoff), off);
+ if (is_tls || !is_bss)
+ foff = off;
+ (*p)->set_address_and_file_offset(addr + (off - startoff), foff);
}
else
{
(*p)->pre_finalize_data_size();
off_t current_size = (*p)->current_data_size();
off = layout->allocate(current_size, align, startoff);
+ foff = off;
if (off == -1)
{
gold_assert((*p)->output_section() != NULL);
"relink with --incremental-full"),
(*p)->output_section()->name());
}
- (*p)->set_address_and_file_offset(addr + (off - startoff), off);
+ (*p)->set_address_and_file_offset(addr + (off - startoff), foff);
if ((*p)->data_size() > current_size)
{
gold_assert((*p)->output_section() != NULL);
// For incremental updates, use the fixed offset for the
// high-water mark computation.
off = (*p)->offset();
+ foff = off;
}
else
{
// The script may have inserted a skip forward, but it
// better not have moved backward.
if ((*p)->address() >= addr + (off - startoff))
- off += (*p)->address() - (addr + (off - startoff));
+ {
+ if (!is_bss && off > foff)
+ gold_warning(_("script places BSS section in the middle "
+ "of a LOAD segment; space will be allocated "
+ "in the file"));
+ off += (*p)->address() - (addr + (off - startoff));
+ if (is_tls || !is_bss)
+ foff = off;
+ }
else
{
if (!layout->script_options()->saw_sections_clause())
os->name(), previous_dot, dot);
}
}
- (*p)->set_file_offset(off);
+ (*p)->set_file_offset(foff);
(*p)->finalize_data_size();
}
// We want to ignore the size of a SHF_TLS SHT_NOBITS
// section. Such a section does not affect the size of a
// PT_LOAD segment.
- if (!(*p)->is_section_flag_set(elfcpp::SHF_TLS)
- || !(*p)->is_section_type(elfcpp::SHT_NOBITS))
+ if (!is_tls || !is_bss)
off += (*p)->data_size();
+ // We don't allocate space in the file for SHT_NOBITS sections,
+ // unless a script has force-placed one in the middle of a segment.
+ if (!is_bss)
+ foff = off;
+
if (off > maxoff)
maxoff = off;
}
*poff = maxoff;
+ *pfoff = foff;
return addr + (maxoff - startoff);
}
return (*p)->output_section();
}
}
- gold_unreachable();
+ return NULL;
}
// Return the number of Output_sections in an Output_segment.
projects / deliverable / binutils-gdb.git / blobdiff