// inremental.cc -- incremental linking support for gold
-// Copyright 2009, 2010, 2011 Free Software Foundation, Inc.
+// Copyright (C) 2009-2020 Free Software Foundation, Inc.
// Written by Mikolaj Zalewski <mikolajz@google.com>.
// This file is part of gold.
#include "incremental.h"
#include "archive.h"
#include "object.h"
-#include "output.h"
#include "target-select.h"
#include "target.h"
#include "fileread.h"
if (vasprintf(&buf, format, args) < 0)
gold_nomem();
gold_info(_("the link might take longer: "
- "cannot perform incremental link: %s"), buf);
+ "cannot perform incremental link: %s"), buf);
free(buf);
}
// Return TRUE if a section of type SH_TYPE can be updated in place
// during an incremental update. We can update sections of type PROGBITS,
-// NOBITS, INIT_ARRAY, FINI_ARRAY, PREINIT_ARRAY, and NOTE. All others
-// will be regenerated.
+// NOBITS, INIT_ARRAY, FINI_ARRAY, PREINIT_ARRAY, NOTE, and
+// (processor-specific) unwind sections. All others will be regenerated.
bool
can_incremental_update(unsigned int sh_type)
|| sh_type == elfcpp::SHT_INIT_ARRAY
|| sh_type == elfcpp::SHT_FINI_ARRAY
|| sh_type == elfcpp::SHT_PREINIT_ARRAY
- || sh_type == elfcpp::SHT_NOTE);
+ || sh_type == elfcpp::SHT_NOTE
+ || sh_type == parameters->target().unwind_section_type());
}
// Find the .gnu_incremental_inputs section and related sections.
unsigned int main_strtab_shndx =
this->elf_file_.section_link(main_symtab_shndx);
gold_assert(main_strtab_shndx != elfcpp::SHN_UNDEF
- && main_strtab_shndx < this->elf_file_.shnum());
+ && main_strtab_shndx < this->elf_file_.shnum());
this->main_strtab_loc_ = this->elf_file_.section_contents(main_strtab_shndx);
// Walk the list of input files (a) to setup an Input_reader for each
for (unsigned int i = 0; i < count; i++)
{
Input_entry_reader input_file = inputs.input_file(i);
+#if __cplusplus >= 2001103L
+ this->input_entry_readers_.emplace_back(input_file);
+#else
this->input_entry_readers_.push_back(Sized_input_reader(input_file));
+#endif
switch (input_file.type())
{
case INCREMENTAL_INPUT_OBJECT:
case INCREMENTAL_INPUT_ARCHIVE:
{
Incremental_library* lib =
- new Incremental_library(input_file.filename(), i,
+ new Incremental_library(input_file.filename(), i,
&this->input_entry_readers_[i]);
this->library_map_[i] = lib;
unsigned int member_count = input_file.get_member_count();
check_input_args(input_args_map, lib->begin(), lib->end());
}
else
- {
- gold_assert(p->is_file());
- unsigned int arg_serial = p->file().arg_serial();
- if (arg_serial > 0)
+ {
+ gold_assert(p->is_file());
+ unsigned int arg_serial = p->file().arg_serial();
+ if (arg_serial > 0)
{
gold_assert(arg_serial <= input_args_map.size());
gold_assert(input_args_map[arg_serial - 1] == 0);
input_args_map[arg_serial - 1] = &*p;
}
- }
+ }
}
}
if (incremental_inputs->command_line() != inputs.command_line())
{
gold_debug(DEBUG_INCREMENTAL,
- "old command line: %s",
- inputs.command_line());
+ "old command line: %s",
+ inputs.command_line());
gold_debug(DEBUG_INCREMENTAL,
- "new command line: %s",
- incremental_inputs->command_line().c_str());
+ "new command line: %s",
+ incremental_inputs->command_line().c_str());
explain_no_incremental(_("command line changed"));
return false;
}
Shdr shdr(pshdr);
const char* name;
if (!shstrtab.get_c_string(shdr.get_sh_name(), &name))
- name = NULL;
+ name = NULL;
gold_debug(DEBUG_INCREMENTAL,
"Output section: %2d %08lx %08lx %08lx %3d %s",
- i,
- static_cast<long>(shdr.get_sh_addr()),
- static_cast<long>(shdr.get_sh_offset()),
- static_cast<long>(shdr.get_sh_size()),
- shdr.get_sh_type(), name ? name : "<null>");
+ i,
+ static_cast<long>(shdr.get_sh_addr()),
+ static_cast<long>(shdr.get_sh_offset()),
+ static_cast<long>(shdr.get_sh_size()),
+ shdr.get_sh_type(), name ? name : "<null>");
this->section_map_[i] = layout->init_fixed_output_section(name, shdr);
pshdr += shdr_size;
}
{
bool is_def;
bool is_copy;
- unsigned int output_symndx =
+ unsigned int output_symndx =
input_file.get_output_symbol_index(i, &is_def, &is_copy);
if (is_copy)
{
elfcpp::Sym<size, big_endian> gsym(sym_p);
unsigned int shndx = gsym.get_st_shndx();
if (shndx < 1 || shndx >= this->section_map_.size())
- continue;
+ continue;
Output_section* os = this->section_map_[shndx];
off_t offset = gsym.get_st_value() - os->address();
os->reserve(offset, gsym.get_st_size());
for (unsigned int i = 0; i < shnum; i++)
{
typename Input_entry_reader::Input_section_info sect =
- input_file.get_input_section(i);
+ input_file.get_input_section(i);
if (sect.output_shndx == 0 || sect.sh_offset == -1)
- continue;
+ continue;
Output_section* os = this->section_map_[sect.output_shndx];
gold_assert(os != NULL);
os->reserve(sect.sh_offset, sect.sh_size);
// output file.
unsigned int offset = isymtab.get_list_head(i);
while (offset > 0)
- {
+ {
Incremental_global_symbol_reader<big_endian> sym_info =
this->inputs_reader().global_symbol_reader_at_offset(offset);
unsigned int r_base = sym_info.reloc_offset();
view_size);
gold_debug(DEBUG_INCREMENTAL,
- " %08lx: %s + %d: type %d addend %ld",
- (long)(section_offset + r_offset),
- os->name(),
- (int)r_offset,
- r_type,
- (long)r_addend);
+ " %08lx: %s + %d: type %d addend %ld",
+ (long)(section_offset + r_offset),
+ os->name(),
+ (int)r_offset,
+ r_type,
+ (long)r_addend);
target->apply_relocation(&relinfo, r_offset, r_type, r_addend,
gsym, view, address, view_size);
of->write_output_view(section_offset, view_size, view);
}
offset = sym_info.next_offset();
- }
+ }
}
}
template<int size, bool big_endian>
Incremental_binary*
make_sized_incremental_binary(Output_file* file,
- const elfcpp::Ehdr<size, big_endian>& ehdr)
+ const elfcpp::Ehdr<size, big_endian>& ehdr)
{
- Target* target = select_target(ehdr.get_e_machine(), size, big_endian,
- ehdr.get_e_ident()[elfcpp::EI_OSABI],
- ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
+ Target* target = select_target(NULL, 0, // XXX
+ ehdr.get_e_machine(), size, big_endian,
+ ehdr.get_e_ident()[elfcpp::EI_OSABI],
+ ehdr.get_e_ident()[elfcpp::EI_ABIVERSION]);
if (target == NULL)
{
explain_no_incremental(_("unsupported ELF machine number %d"),
- ehdr.get_e_machine());
+ ehdr.get_e_machine());
return NULL;
}
bool big_endian = false;
std::string error;
if (!elfcpp::Elf_recognizer::is_valid_header(p, want, &size, &big_endian,
- &error))
+ &error))
{
explain_no_incremental(error.c_str());
return NULL;
if (size == 32)
{
if (big_endian)
- {
+ {
#ifdef HAVE_TARGET_32_BIG
- result = make_sized_incremental_binary<32, true>(
- file, elfcpp::Ehdr<32, true>(p));
+ result = make_sized_incremental_binary<32, true>(
+ file, elfcpp::Ehdr<32, true>(p));
#else
- explain_no_incremental(_("unsupported file: 32-bit, big-endian"));
+ explain_no_incremental(_("unsupported file: 32-bit, big-endian"));
#endif
- }
+ }
else
- {
+ {
#ifdef HAVE_TARGET_32_LITTLE
- result = make_sized_incremental_binary<32, false>(
- file, elfcpp::Ehdr<32, false>(p));
+ result = make_sized_incremental_binary<32, false>(
+ file, elfcpp::Ehdr<32, false>(p));
#else
- explain_no_incremental(_("unsupported file: 32-bit, little-endian"));
+ explain_no_incremental(_("unsupported file: 32-bit, little-endian"));
#endif
- }
+ }
}
else if (size == 64)
{
if (big_endian)
- {
+ {
#ifdef HAVE_TARGET_64_BIG
- result = make_sized_incremental_binary<64, true>(
- file, elfcpp::Ehdr<64, true>(p));
+ result = make_sized_incremental_binary<64, true>(
+ file, elfcpp::Ehdr<64, true>(p));
#else
- explain_no_incremental(_("unsupported file: 64-bit, big-endian"));
+ explain_no_incremental(_("unsupported file: 64-bit, big-endian"));
#endif
- }
+ }
else
- {
+ {
#ifdef HAVE_TARGET_64_LITTLE
- result = make_sized_incremental_binary<64, false>(
- file, elfcpp::Ehdr<64, false>(p));
+ result = make_sized_incremental_binary<64, false>(
+ file, elfcpp::Ehdr<64, false>(p));
#else
- explain_no_incremental(_("unsupported file: 64-bit, little-endian"));
+ explain_no_incremental(_("unsupported file: 64-bit, little-endian"));
#endif
- }
+ }
}
else
gold_unreachable();
|| is_prefix_of("--incremental-base=", argv[i])
|| is_prefix_of("--incremental-patch=", argv[i])
|| is_prefix_of("--debug=", argv[i]))
- continue;
+ continue;
if (strcmp(argv[i], "--incremental-base") == 0
|| strcmp(argv[i], "--incremental-patch") == 0
|| strcmp(argv[i], "--debug") == 0)
// Now append argv[i], but with all single-quotes escaped
const char* argpos = argv[i];
while (1)
- {
- const int len = strcspn(argpos, "'");
- args.append(argpos, len);
- if (argpos[len] == '\0')
- break;
- args.append("'\"'\"'");
- argpos += len + 1;
- }
+ {
+ const int len = strcspn(argpos, "'");
+ args.append(argpos, len);
+ if (argpos[len] == '\0')
+ break;
+ args.append("'\"'\"'");
+ argpos += len + 1;
+ }
args.append("'");
}
this->command_line_ = args;
this->strtab_->add(this->command_line_.c_str(), false,
- &this->command_line_key_);
+ &this->command_line_key_);
}
// Record the input archive file ARCHIVE. This is called by the
if (!obj->is_dynamic())
{
this->current_object_entry_ =
- new Incremental_object_entry(filename_key, obj, arg_serial, mtime);
+ new Incremental_object_entry(filename_key, obj, arg_serial, mtime);
input_entry = this->current_object_entry_;
if (arch != NULL)
{
#ifdef HAVE_TARGET_32_LITTLE
case Parameters::TARGET_32_LITTLE:
this->inputs_section_ =
- new Output_section_incremental_inputs<32, false>(this, symtab);
+ new Output_section_incremental_inputs<32, false>(this, symtab);
reloc_align = 4;
break;
#endif
#ifdef HAVE_TARGET_32_BIG
case Parameters::TARGET_32_BIG:
this->inputs_section_ =
- new Output_section_incremental_inputs<32, true>(this, symtab);
+ new Output_section_incremental_inputs<32, true>(this, symtab);
reloc_align = 4;
break;
#endif
#ifdef HAVE_TARGET_64_LITTLE
case Parameters::TARGET_64_LITTLE:
this->inputs_section_ =
- new Output_section_incremental_inputs<64, false>(this, symtab);
+ new Output_section_incremental_inputs<64, false>(this, symtab);
reloc_align = 8;
break;
#endif
#ifdef HAVE_TARGET_64_BIG
case Parameters::TARGET_64_BIG:
this->inputs_section_ =
- new Output_section_incremental_inputs<64, true>(this, symtab);
+ new Output_section_incremental_inputs<64, true>(this, symtab);
reloc_align = 8;
break;
#endif
continue;
if (sym->is_forwarder())
sym = this->symtab_->resolve_forwards(sym);
- if (sym->symtab_index() != -1U)
- ++nsyms_out;
+ if (sym->symtab_index() != -1U)
+ ++nsyms_out;
}
info_offset += nsyms_out * 4;
}
gold_assert(pov - oview == oview_size);
// Write the .gnu_incremental_symtab section.
- gold_assert(global_sym_count * 4 == symtab_size);
+ gold_assert(static_cast<off_t>(global_sym_count) * 4 == symtab_size);
this->write_symtab(symtab_view, global_syms, global_sym_count);
delete[] global_syms;
{
gold_assert(static_cast<unsigned int>(pov - oview) == (*p)->get_offset());
section_offset_type filename_offset =
- strtab->get_offset_from_key((*p)->get_filename_key());
+ strtab->get_offset_from_key((*p)->get_filename_key());
const Timespec& mtime = (*p)->get_mtime();
unsigned int flags = (*p)->type();
if ((*p)->is_in_system_directory())
- flags |= INCREMENTAL_INPUT_IN_SYSTEM_DIR;
+ flags |= INCREMENTAL_INPUT_IN_SYSTEM_DIR;
if ((*p)->as_needed())
- flags |= INCREMENTAL_INPUT_AS_NEEDED;
+ flags |= INCREMENTAL_INPUT_AS_NEEDED;
Swap32::writeval(pov, filename_offset);
Swap32::writeval(pov + 4, (*p)->get_info_offset());
Swap64::writeval(pov + 8, mtime.seconds);
// but exclude linker-predefined symbols and symbols
// copied from shared objects.
if (!sym->is_predefined()
- && !sym->is_copied_from_dynobj())
+ && !sym->is_copied_from_dynobj())
shndx = -1U;
}
else if (sym->object() == obj && sym->is_defined())
continue;
if (sym->is_forwarder())
sym = this->symtab_->resolve_forwards(sym);
- if (sym->symtab_index() == -1U)
- continue;
+ if (sym->symtab_index() == -1U)
+ continue;
unsigned int flags = 0;
// If the symbol has hidden or internal visibility, we
// mark it as defined in the shared object so we don't
unsigned int first_plt_entry_offset;
// Size of a PLT entry (this is a target-dependent value).
unsigned int plt_entry_size;
+ // Size of a GOT entry (this is a target-dependent value).
+ unsigned int got_entry_size;
// Symbol index to write in the GOT descriptor array. For global symbols,
// this is the global symbol table index; for local symbols, it is the
// local symbol table index.
void
visit(unsigned int got_type, unsigned int got_offset)
{
- unsigned int got_index = got_offset / this->got_entry_size_;
+ unsigned int got_index = got_offset / this->info_.got_entry_size;
gold_assert(got_index < this->info_.got_count);
// We can only handle GOT entry types in the range 0..0x7e
// because we use a byte array to store them, and we use the
}
private:
- static const unsigned int got_entry_size_ = size / 8;
struct Got_plt_view_info& info_;
};
void
visit(unsigned int got_type, unsigned int got_offset)
{
- unsigned int got_index = got_offset / this->got_entry_size_;
+ unsigned int got_index = got_offset / this->info_.got_entry_size;
gold_assert(got_index < this->info_.got_count);
// We can only handle GOT entry types in the range 0..0x7e
// because we use a byte array to store them, and we use the
}
private:
- static const unsigned int got_entry_size_ = size / 8;
struct Got_plt_view_info& info_;
};
const Got_offset_list* got_offsets = sym->got_offset_list();
if (got_offsets != NULL)
{
- this->info_.sym_index = sym->symtab_index();
- this->info_.input_index = 0;
- Got_visitor v(this->info_);
+ this->info_.sym_index = sym->symtab_index();
+ this->info_.input_index = 0;
+ Got_visitor v(this->info_);
got_offsets->for_all_got_offsets(&v);
}
if (sym->has_plt_offset())
view_info.plt_count = target->plt_entry_count();
view_info.first_plt_entry_offset = target->first_plt_entry_offset();
view_info.plt_entry_size = target->plt_entry_size();
+ view_info.got_entry_size = target->got_entry_size();
view_info.got_type_p = pov + 8;
view_info.got_desc_p = (view_info.got_type_p
+ ((view_info.got_count + 3) & ~3));
for (unsigned int i = 1; i < shnum; i++)
{
typename Input_entry_reader::Input_section_info sect =
- this->input_reader_.get_input_section(i - 1);
+ this->input_reader_.get_input_section(i - 1);
// Add the section to the incremental inputs layout.
incremental_inputs->report_input_section(this, i, sect.name,
sect.sh_size);
if (sect.output_shndx == 0 || sect.sh_offset == -1)
- continue;
+ continue;
Output_section* os = this->ibase_->output_section(sect.output_shndx);
gold_assert(os != NULL);
out_sections[i] = os;
{
const char* signature = this->input_reader_.get_comdat_group_signature(i);
if (signature == NULL || signature[0] == '\0')
- this->error(_("COMDAT group has no signature"));
+ this->error(_("COMDAT group has no signature"));
bool keep = layout->find_or_add_kept_section(signature, this, i, true,
true, NULL);
if (keep)
incremental_inputs->report_comdat_group(this, signature);
else
- this->error(_("COMDAT group %s included twice in incremental link"),
+ this->error(_("COMDAT group %s included twice in incremental link"),
signature);
}
// Local hidden symbols start out as globals, but get converted to
// to local during output.
if (st_bind == elfcpp::STB_LOCAL)
- st_bind = elfcpp::STB_GLOBAL;
+ st_bind = elfcpp::STB_GLOBAL;
unsigned int input_shndx = info.shndx();
if (input_shndx == 0 || input_shndx == -1U)
Symbol* res = symtab->add_from_incrobj(this, name, NULL, &sym);
if (shndx != elfcpp::SHN_UNDEF)
- ++this->defined_count_;
+ ++this->defined_count_;
// If this is a linker-defined symbol that hasn't yet been defined,
// define it now.
template<int size, bool big_endian>
std::string
-Sized_relobj_incr<size, big_endian>::do_section_name(unsigned int shndx)
+Sized_relobj_incr<size, big_endian>::do_section_name(unsigned int shndx) const
{
- Output_sections& out_sections(this->output_sections());
- Output_section* os = out_sections[shndx];
+ const Output_sections& out_sections(this->output_sections());
+ const Output_section* os = out_sections[shndx];
if (os == NULL)
return NULL;
return os->name();
elfcpp::Sym<size, big_endian> sym(symp);
const char* name;
if (!strtab.get_c_string(sym.get_st_name(), &name))
- name = "";
+ name = "";
gold_debug(DEBUG_INCREMENTAL, "Local symbol %d: %s", i, name);
name = pool->add(name, true, NULL);
this->local_symbols_.push_back(Local_symbol(name,
// Relocate the input sections and write out the local symbols.
// We don't actually do any relocation here. For unchanged input files,
// we reapply relocations only for symbols that have changed; that happens
-// in queue_final_tasks. We do need to rewrite the incremental relocations
-// for this object.
+// in Layout_task_runner::run(). We do need to rewrite the incremental
+// relocations for this object.
template<int size, bool big_endian>
void
unsigned char* dyn_oview = NULL;
if (dyn_output_size > 0)
dyn_oview = of->get_output_view(this->local_dynsym_offset_,
- dyn_output_size);
+ dyn_output_size);
// Write the local symbols.
unsigned char* ov = oview;
// Write the symbol to the output dynamic symbol table.
if (lsym.needs_dynsym_entry)
- {
- gold_assert(dyn_ov < dyn_oview + dyn_output_size);
- elfcpp::Sym_write<size, big_endian> osym(dyn_ov);
- osym.put_st_name(dynpool->get_offset(lsym.name));
- osym.put_st_value(lsym.st_value);
- osym.put_st_size(lsym.st_size);
+ {
+ gold_assert(dyn_ov < dyn_oview + dyn_output_size);
+ elfcpp::Sym_write<size, big_endian> osym(dyn_ov);
+ osym.put_st_name(dynpool->get_offset(lsym.name));
+ osym.put_st_value(lsym.st_value);
+ osym.put_st_size(lsym.st_size);
osym.put_st_info(elfcpp::STB_LOCAL,
static_cast<elfcpp::STT>(lsym.st_type));
- osym.put_st_other(0);
- osym.put_st_shndx(st_shndx);
- dyn_ov += sym_size;
- }
+ osym.put_st_other(0);
+ osym.put_st_shndx(st_shndx);
+ dyn_ov += sym_size;
+ }
}
if (output_size > 0)
{
gold_assert(dyn_ov - dyn_oview == dyn_output_size);
of->write_output_view(this->local_dynsym_offset_, dyn_output_size,
- dyn_oview);
+ dyn_oview);
}
}
elfcpp::Sym<size, big_endian> sym(symbuf);
elfcpp::Sym_write<size, big_endian> osym(symbuf);
- typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type;
-
unsigned int nsyms = this->input_reader_.get_global_symbol_count();
this->symbols_.resize(nsyms);
// Local hidden symbols start out as globals, but get converted to
// to local during output.
if (st_bind == elfcpp::STB_LOCAL)
- st_bind = elfcpp::STB_GLOBAL;
+ st_bind = elfcpp::STB_GLOBAL;
if (!is_def)
{
template<int size, bool big_endian>
std::string
-Sized_incr_dynobj<size, big_endian>::do_section_name(unsigned int)
+Sized_incr_dynobj<size, big_endian>::do_section_name(unsigned int) const
{
gold_unreachable();
}
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