binutils-gdb/gold/script-sections.h

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// script-sections.h -- linker script SECTIONS for gold -*- C++ -*-
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
// This is for the support of the SECTIONS clause in linker scripts.
#ifndef GOLD_SCRIPT_SECTIONS_H
#define GOLD_SCRIPT_SECTIONS_H
#include <cstdio>
#include <list>
#include <vector>
namespace gold
{
struct Parser_output_section_header;
struct Parser_output_section_trailer;
struct Input_section_spec;
class Expression;
class Sections_element;
class Memory_region;
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class Phdrs_element;
class Output_data;
class Output_section_definition;
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class Output_section;
class Output_segment;
class Orphan_section_placement;
class Script_sections
{
public:
// This is a list, not a vector, because we insert orphan sections
// in the middle.
typedef std::list<Sections_element*> Sections_elements;
2010-04-09 Doug Kwan <dougkwan@google.com> * layout.cc (Layout::choose_output_section): Handle script section types. (Layout::make_output_section_for_script): Add section type parameter. Handle script section types. * layout.h (Layout::make_output_section_for_script): Add section type parameter. * output.cc (Output_section::Output_section): Initialize data member is_noload_. (Output_section::do_reset_address_and_file_offset): Do not set address to 0 if section is a NOLOAD section. * output.h (Output_section::is_noload): New method. (Output_section::set_is_noload): Ditto. (Output_section::is_noload_): New data member. * script-c.h (Script_section_type): New enum type. (struct Parser_output_section_header): Add new file section_type. * script-sections.cc (Sections_element::output_section_name): Add parameter for returning script section type. (Output_section_definition::output_section_name): Ditto. (Output_section_definition::section_type)P; New method. (Output_section_definiton::script_section_type_name): Ditto. (Output_section_definition::script_section_type_): New data member. (Output_section_definition::Output_section_definition): Initialize data member Output_section_definition::script_section_type_. (Output_section_definition::create_sections): Pass script section type to Layout::make_output_section_for_script. (Output_section_definition::output_section_name): Return script section type to caller. (Output_section_definition::set_section_address): Do not advance dot value and load address if section type is NOLOAD. Set address of NOLOAD sections regardless of section flags. (Output_section_definition::print): Print section type if it is not SCRIPT_SECTION_TYPE_NONE. (Output_section_definition::section_type): New method. (Output_section_definition::script_section_type_name): Ditto. (Script_sections::output_section_name): Add new parameter PSECTION_TYPE for returning script section type. Pass it to section elements. Handle discard sections. (Sort_output_sections::operator()): Handle NOLOAD sections. * script-sections.h (Script_sections::Section_type): New enum type. (Script_sections::output_section_name): Add a new parameter for returning script section type. * script.cc (script_keyword_parsecodes): Add keywords COPY, DSECT, INFO and NOLOAD. * yyscript.y (union): Add new field SECTION_TYPE. (COPY, DSECT, INFO, NOLOAD): New tokens. (opt_address_and_section_type): Change type to output_section_header. (section_type): New non-terminal (section_header): Handle section type. (opt_address_and_section_type): Return section type value.
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// Logical script section types. We map section types returned by the
// parser into these since some section types have the same semantics.
enum Section_type
{
// No section type specified.
ST_NONE,
// Section is NOLOAD. We allocate space in the output but section
// is not loaded in runtime.
ST_NOLOAD,
// No space is allocated to section.
ST_NOALLOC
};
Script_sections();
// Start a SECTIONS clause.
void
start_sections();
// Finish a SECTIONS clause.
void
finish_sections();
// Return whether we ever saw a SECTIONS clause. If we did, then
// all section layout needs to go through this class.
bool
saw_sections_clause() const
{ return this->saw_sections_clause_; }
// Return whether we are currently processing a SECTIONS clause.
bool
in_sections_clause() const
{ return this->in_sections_clause_; }
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// Return whether we ever saw a PHDRS clause. We ignore the PHDRS
// clause unless we also saw a SECTIONS clause.
bool
saw_phdrs_clause() const
{ return this->saw_sections_clause_ && this->phdrs_elements_ != NULL; }
// Start processing entries for an output section.
void
start_output_section(const char* name, size_t namelen,
const Parser_output_section_header*);
// Finish processing entries for an output section.
void
finish_output_section(const Parser_output_section_trailer*);
// Add a data item to the current output section.
void
add_data(int size, bool is_signed, Expression* val);
// Add a symbol to be defined.
void
add_symbol_assignment(const char* name, size_t length, Expression* value,
bool provide, bool hidden);
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// Add an assignment to the special dot symbol.
void
add_dot_assignment(Expression* value);
// Add an assertion.
void
add_assertion(Expression* check, const char* message, size_t messagelen);
// Add a setting for the fill value.
void
add_fill(Expression* val);
// Add an input section specification.
void
add_input_section(const Input_section_spec* spec, bool keep);
* layout.cc (Layout::attach_allocated_section_to_segment): Don't set tls_segment_ or relro_segment_. (Layout::make_output_segment): Set tls_segment_ and relro_segment_ when appropriate. * output.h (Output_section::clear_is_relro): New function. * output.cc (Output_segment::add_output_section): Handle SHF_TLS sections specially even when output_data_ is empty. (Output_segment::maximum_alignment): When first section is relro, only force alignment for PT_LOAD segments. * script.cc (script_data_segment_align): New function. (script_data_segment_relro_end): New function. * script-c.h (script_data_segment_align): Declare. (script_data_segment_relro_end): Declare. * script-sections.h (class Script_sections): Declare data_segment_align and data_segment_relro_end. Add fields segment_align_index_ and saw_relro_end_. * script-sections.cc (class Sections_element): Add set_is_relro virtual function. Add new bool* parameter to place_orphan_here. Add get_output_section virtual function. (class Output_section_definition): Add set_is_relro. Add new bool* parameter to place_orphan_here. Add get_output_section. Add is_relro_ field. (Output_section_definition::Output_section_definition): Initialize evaluated_address_, evaluated_load_address, evaluated_addralign_, and is_relro_ fields. (Output_section_definition::place_orphan_here): Add is_relro parameter. (Output_section_definition::set_section_addresses): Set relro for output section. (Output_section_definition::alternate_constraint): Likewise. (class Orphan_output_section): Add new bool* parameter to place_orphan_here. Add get_output_section. (Orphan_output_section::place_orphan_here): Add is_relro parameter. (Script_sections::Script_sections): Initialize data_segment_align_index_ and saw_relro_end_. (Script_sections::data_segment_align): New function. (Script_sections::data_segment_relro_end): New function. (Script_sections::place_orphan): Set or clear is_relro. (Script_sections::set_section_addresses): Force alignment of first TLS section. * yyscript.y (exp): Call script_data_segment_align and script_data_segment_relro_end. * testsuite/relro_script_test.t: New file. * testsuite/relro_test.cc (using_script): Declare. (t1, t2): Test using_script. * testsuite/Makefile.am (check_PROGRAMS): Add relro_script_test. (relro_script_test_SOURCES): Define. (relro_script_test_DEPENDENCIES): Define. (relro_script_test_LDFLAGS): Define. (relro_script_test_LDADD): Define. (relro_script_test.so): New target. * testsuite/Makefile.in: Rebuild.
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// Saw DATA_SEGMENT_ALIGN.
void
data_segment_align();
// Saw DATA_SEGMENT_RELRO_END.
void
data_segment_relro_end();
// Create any required sections.
void
create_sections(Layout*);
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// Add any symbols we are defining to the symbol table.
void
add_symbols_to_table(Symbol_table*);
// Finalize symbol values and check assertions.
void
finalize_symbols(Symbol_table* symtab, const Layout* layout);
// Find the name of the output section to use for an input file name
// and section name. This returns a name, and sets
// *OUTPUT_SECTION_SLOT to point to the address where the actual
// output section may be stored.
// 1) If the input section should be discarded, this returns NULL
// and sets *OUTPUT_SECTION_SLOT to NULL.
// 2) If the input section is mapped by the SECTIONS clause, this
// returns the name to use for the output section (in permanent
// storage), and sets *OUTPUT_SECTION_SLOT to point to where the
// output section should be stored. **OUTPUT_SECTION_SLOT will be
// non-NULL if we have seen this output section already.
// 3) If the input section is not mapped by the SECTIONS clause,
// this returns SECTION_NAME, and sets *OUTPUT_SECTION_SLOT to
// NULL.
2010-04-09 Doug Kwan <dougkwan@google.com> * layout.cc (Layout::choose_output_section): Handle script section types. (Layout::make_output_section_for_script): Add section type parameter. Handle script section types. * layout.h (Layout::make_output_section_for_script): Add section type parameter. * output.cc (Output_section::Output_section): Initialize data member is_noload_. (Output_section::do_reset_address_and_file_offset): Do not set address to 0 if section is a NOLOAD section. * output.h (Output_section::is_noload): New method. (Output_section::set_is_noload): Ditto. (Output_section::is_noload_): New data member. * script-c.h (Script_section_type): New enum type. (struct Parser_output_section_header): Add new file section_type. * script-sections.cc (Sections_element::output_section_name): Add parameter for returning script section type. (Output_section_definition::output_section_name): Ditto. (Output_section_definition::section_type)P; New method. (Output_section_definiton::script_section_type_name): Ditto. (Output_section_definition::script_section_type_): New data member. (Output_section_definition::Output_section_definition): Initialize data member Output_section_definition::script_section_type_. (Output_section_definition::create_sections): Pass script section type to Layout::make_output_section_for_script. (Output_section_definition::output_section_name): Return script section type to caller. (Output_section_definition::set_section_address): Do not advance dot value and load address if section type is NOLOAD. Set address of NOLOAD sections regardless of section flags. (Output_section_definition::print): Print section type if it is not SCRIPT_SECTION_TYPE_NONE. (Output_section_definition::section_type): New method. (Output_section_definition::script_section_type_name): Ditto. (Script_sections::output_section_name): Add new parameter PSECTION_TYPE for returning script section type. Pass it to section elements. Handle discard sections. (Sort_output_sections::operator()): Handle NOLOAD sections. * script-sections.h (Script_sections::Section_type): New enum type. (Script_sections::output_section_name): Add a new parameter for returning script section type. * script.cc (script_keyword_parsecodes): Add keywords COPY, DSECT, INFO and NOLOAD. * yyscript.y (union): Add new field SECTION_TYPE. (COPY, DSECT, INFO, NOLOAD): New tokens. (opt_address_and_section_type): Change type to output_section_header. (section_type): New non-terminal (section_header): Handle section type. (opt_address_and_section_type): Return section type value.
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// PSCRIPT_SECTION_TYPE points to a location for returning the section
// type specified in script. This can be SCRIPT_SECTION_TYPE_NONE if
// no type is specified.
// *KEEP indicates whether the section should survive garbage collection.
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const char*
output_section_name(const char* file_name, const char* section_name,
2010-04-09 Doug Kwan <dougkwan@google.com> * layout.cc (Layout::choose_output_section): Handle script section types. (Layout::make_output_section_for_script): Add section type parameter. Handle script section types. * layout.h (Layout::make_output_section_for_script): Add section type parameter. * output.cc (Output_section::Output_section): Initialize data member is_noload_. (Output_section::do_reset_address_and_file_offset): Do not set address to 0 if section is a NOLOAD section. * output.h (Output_section::is_noload): New method. (Output_section::set_is_noload): Ditto. (Output_section::is_noload_): New data member. * script-c.h (Script_section_type): New enum type. (struct Parser_output_section_header): Add new file section_type. * script-sections.cc (Sections_element::output_section_name): Add parameter for returning script section type. (Output_section_definition::output_section_name): Ditto. (Output_section_definition::section_type)P; New method. (Output_section_definiton::script_section_type_name): Ditto. (Output_section_definition::script_section_type_): New data member. (Output_section_definition::Output_section_definition): Initialize data member Output_section_definition::script_section_type_. (Output_section_definition::create_sections): Pass script section type to Layout::make_output_section_for_script. (Output_section_definition::output_section_name): Return script section type to caller. (Output_section_definition::set_section_address): Do not advance dot value and load address if section type is NOLOAD. Set address of NOLOAD sections regardless of section flags. (Output_section_definition::print): Print section type if it is not SCRIPT_SECTION_TYPE_NONE. (Output_section_definition::section_type): New method. (Output_section_definition::script_section_type_name): Ditto. (Script_sections::output_section_name): Add new parameter PSECTION_TYPE for returning script section type. Pass it to section elements. Handle discard sections. (Sort_output_sections::operator()): Handle NOLOAD sections. * script-sections.h (Script_sections::Section_type): New enum type. (Script_sections::output_section_name): Add a new parameter for returning script section type. * script.cc (script_keyword_parsecodes): Add keywords COPY, DSECT, INFO and NOLOAD. * yyscript.y (union): Add new field SECTION_TYPE. (COPY, DSECT, INFO, NOLOAD): New tokens. (opt_address_and_section_type): Change type to output_section_header. (section_type): New non-terminal (section_header): Handle section type. (opt_address_and_section_type): Return section type value.
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Output_section*** output_section_slot,
Section_type* pscript_section_type,
bool* keep);
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// Place a marker for an orphan output section into the SECTIONS
// clause.
void
place_orphan(Output_section* os);
// Set the addresses of all the output sections. Return the segment
// which holds the file header and segment headers, if any.
Output_segment*
set_section_addresses(Symbol_table*, Layout*);
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// Add a program header definition.
void
add_phdr(const char* name, size_t namelen, unsigned int type,
bool filehdr, bool phdrs, bool is_flags_valid, unsigned int flags,
Expression* load_address);
// Return the number of segments we expect to create based on the
// SECTIONS clause.
size_t
expected_segment_count(const Layout*) const;
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// Add the file header and segment header to non-load segments as
// specified by the PHDRS clause.
void
put_headers_in_phdrs(Output_data* file_header, Output_data* segment_headers);
// Look for an output section by name and return the address, the
// load address, the alignment, and the size. This is used when an
// expression refers to an output section which was not actually
// created. This returns true if the section was found, false
// otherwise.
bool
get_output_section_info(const char* name, uint64_t* address,
uint64_t* load_address, uint64_t* addralign,
uint64_t* size) const;
2009-09-17 Doug Kwan <dougkwan@google.com> * debug.h (DEBUG_RELAXATION): New constant. (DEBUG_ALL): Add DEBUG_RELAXATION. (debug_string_to_enum): Add relaxation debug option. * layout.cc (Layout::Relaxation_debug_check::check_output_data_for_reset_values, Layout::Relaxation_debug_check::read_sections, Layout::Relaxation_debug_check::read_sections): New method definitions. (Layout::Layout): Initialize data members record_output_section_data_from_scrips_, script_output_section_data_list_ and relaxation_debug_check_. (Layout::save_segments, Layout::restore_segments, Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation, Layout::relaxation_loop_body): New method definitions. (Layout::finalize): Support relaxation. Move section layout code to Layout::relaxation_loop_body. (Layout::set_asection_address_from_script): Move code for orphan section placement out. (Layout::place_orphan_sections_in_script): New method definition. * layout.h (Output_segment_headers, Output_file_header): New forward class declarations. (Layout::~Layout): Define. (Layout::new_output_section_data_from_script): New method definition. (Layout::place_orphan_sections_in_script): New method declaration. (Layout::Segment_states): New type declaration. (Layout::save_segments, Layout::restore_segments, Layout::clean_up_after_relaxation, Layout::prepare_for_relaxation, Layout::relaxation_loop_body): New method declarations. (Layout::Output_section_data_list): New type declaration. (Layout::Relaxation_debug_check): New class definition. (Layout::record_output_section_data_from_script_, Layout::script_output_section_data_list_, Layout::segment_states_, Layout::relaxation_debug_check_): New data members. * output.cc: (Output_section_headers::do_size): New method definition. (Output_section_headers::Output_section_headers): Move size computation to Output_section_headers::do_size. (Output_segment_headers::do_size): New method definition. (Output_file_header::Output_file_header): Move size computation to Output_file_header::do_size and call it. (Output_file_header::do_size): New method definition. (Output_data_group::Output_data_group): Adjust call to Output_section_data. (Output_data_dynamic::set_final_data_size): Add DT_NULL tag only once. (Output_symtab_xindex::do_write): Add array bound check. (Output_section::Input_section::print_to_mapfile): Handle RELAXED_INPUT_SECTION_CODE. (Output_section::Output_section): Initialize data member checkpoint_. (Output_section::~Output_section): Delete checkpoint object pointed by checkpoint_. (Output_section::add_input_section): Always add an Input_section if relaxing. (Output_section::add_merge_input_section): Add assert. (Output_section::relax_input_section): New method definition. (Output_section::set_final_data_size): Set load address to zero for an unallocated section. (Output_section::do_address_and_file_offset_have_reset_values): New method definition. (Output_section::Input_section_sort_enty::Input_section_sort_enty): Handle relaxed input section. (Output_section::sort_attached_input_sections): Checkpoint input section list lazily. (Output_section::get_input_sections): Change type of input_sections to list of Simple_input_section pointers. Checkpoint input section list lazily. Also handle relaxed input sections. (Output_section::add_input_section_for_script): Take a reference to a Simple_input_section object instead of Relobj pointer and section index as parameter. Handle relaxed input sections. (Output_section::save_states, Output_section::restore_states): New method definitions. * output.h (Output_data::Output_data): Initialize is_data_size_fixed_. (Output_data::is_data_size_fixed): New method definition. (Output_data::reset_addresss_and_file_offset): Do not reset data size if it is fixed. (Output_data::address_and_file_offset_have_reset_values): New method definition. (Output_data::do_address_and_file_offset_have_reset_values): New method definition. (Output_data::set_data_size): Check that data size is not fixed. (Output_data::fix_data_size): New method definition. (Output_data::is_data_size_fixed_): New data member. (Output_section_headers::set_final_data_size): New method definition. (Output_section_headers::do_size): New method declaration. (Output_segment_headers::set_final_data_size): New method definition. (Output_segment_headers::do_size): New method declaration. (Output_file_header::set_final_data_size)::New method definition. (Output_file_header::do_size)::New method declaration. (Output_section_data::Output_section_data): Add new parameter is_data_size_fixed and use it to fix data size. (Output_data_const::Output_data_const): Adjust call to base class constructor and fix data size. (Output_data_const_buffer::Output_data_const_buffer): Adjust call to base class constructor and fix data size. (Output_data_fixed_space::Output_data_fixed_space): Adjust call to base class constructor and fix data size. (Output_data_zero_fill::Output_data_zero_fill): Adjust call to base class constructor and fix data size. (Output_data_group::set_final_data_size): New method definition. (Output_data_dynamic::Dynamic_entry::tag): New method definition. (Output_symtab_xindex::Output_symtab_xindex): Adjust call to base class constructor and fix data size. (Output_relaxed_input_section): New class definition. (Output_section::Simple_input_section): New class definition. (Output_section::get_input_sections): Adjust parameter list. (Output_section::add_input_section_for_script): Same. (Output_section::save_states, Output_section::restore_states, Output_section::do_address_and_file_offset_have_reset_values, (Output_section::Input_section::Input_section): Handle RELAXED_INPUT_SECTION_CODE. Add new overload for Output_relaxed_input_section. (Output_section::Input_section::is_input_section, Output_section::Input_section::set_output_section): Handle relaxed input section. (Output_section::Input_section::is_relaxed_input_section, Output_section::Input_section::output_section_data, Output_section::Input_section::relaxed_input_section): New method definitions. (Output_section::Input_section::RELAXED_INPUT_SECTION_CODE): New enum value. (Output_section::Input_section::u1_): Update comments. (Output_section::Input_section::u2_): Add new union member poris. (Output_section::Checkpoint_output_section): New classs definition. (Output_section::relax_input_section): New method declaration. (Output_section::checkpoint_): New data member. (Output_segment): Update comments. (Output_segment::Output_segment): Un-privatize copy constructor. (Output_segment::operator=): Un-privatize. * script-sections.cc (Output_section_element::Input_section_list): Change element type to Output_section::Simple_input_section. (Output_section_element_dot_assignment::set_section_addresses): Register output section data for relaxation clean up. (Output_data_exression::Output_data_expression): Adjust call to base constructor to fix data size. (Output_section_element_data::set_section_addresses): Register Output_data_expression object for relaxation clean up. (struct Input_section_info): Replace Relobj pointer and section index pair with Output_section::Simple_input_section and Convert struct to a class. (Input_section_sorter::operator()): Adjust access to Input_section_info data member to use accessors. (Output_section_element_input::set_section_addresses): Use layout parameter. Adjust code to use Output_section::Simple_input_section and Input_secction_info classes. Register filler for relaxation clean up. (Orphan_output_section::set_section_addresses): Replace Relobj pointer and section index pair with Output_section::Simple_input_section class. Adjust code accordingly. (Phdrs_element::release_segment): New method definition. (Script_sections::attach_sections_using_phdrs_clause): Do not modify segment list. (Script_sections::release_segments): New method definition. * gold/script-sections.h (Script_sections::release_segments): New method declaration. * gold/target.h (Target::may_relax, Target::relax, Target::do_may_relax, Target::do_relax): New method definitions.
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// Release all Output_segments. This is used in relaxation.
void
release_segments();
2009-10-16 Doug Kwan <dougkwan@google.com> * expression.cc (class Segment_start_expression): New class definition. (Segment_start_expression::value): New method definition. (script_exp_function_segment_start): Return a new Segment_start_expression. * gold/script-c.h (script_saw_segment_start_expression): New function prototype. * script-sections.cc (Script_sections::Script_sections): Initialize SAW_SEGMENT_START_EXPRESSION_ to false. (Script_sections::set_section_addresses): Use -Ttext, -Tdata and -Tbbs options to specify section addresses if given in command line and no SEGMENT_START expression is seen in a script. * script-sections.h (Script_sections::saw_segment_start_expression, Script_sections::set_saw_segment_start_expression): New method definition. (Script_sections::saw_segment_start_expression_): New data member declaration. * script.cc (script_saw_segment_start_expression): New function. * yyscript.y (SEGMENT_START): Call script_saw_segment_start_expression. * testsuite/Makefile.am (check_SCRIPTS): Add script_test_6.sh, script_test_7.sh and script_test_8.sh. (check_DATA): Add script_test_6.stdout, script_test_7.stdout and script_test_8.stdout. (MOSTLYCLEANFILES): Add script_test_6, script_test_7 and script_test_8. (script_test_6, script_test_6.stdout, script_test_7, script_test_7.stdout, script_test_8, script_test_8.stdout): New rules. * Makefile.in: Regenerate. * testsuite/script_test_6.sh: New file. * testsuite/script_test_6.t: Same. * testsuite/script_test_7.sh: Same. * testsuite/script_test_7.t: Same. * testsuite/script_test_8.sh: Same.
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// Whether we ever saw a SEGMENT_START expression, the presence of which
// changes the behaviour of -Ttext, -Tdata and -Tbss options.
bool
saw_segment_start_expression() const
{ return this->saw_segment_start_expression_; }
// Set the flag which indicates whether we saw a SEGMENT_START expression.
void
set_saw_segment_start_expression(bool value)
{ this->saw_segment_start_expression_ = value; }
// Add a memory region.
void
add_memory_region(const char*, size_t, unsigned int,
Expression*, Expression*);
// Find a memory region's origin.
Expression*
find_memory_region_origin(const char*, size_t);
// Find a memory region's length.
Expression*
find_memory_region_length(const char*, size_t);
* script-sections.cc(class Memory_region): Remove current_lma_offset_ field. Rename current_vma_offset_ to current_offset_. Add last_section_ field. (Memory_region::get_current_vma_address): Rename to get_current_address. (Memory_region::get_current_lma_address): Delete. (Memory_region::increment_vma_offset): Rename to increment_offset. (Memory_region::increment_lma_offset): Delete. (Memory_region::attributes_compatible): New method. Returns true if the provided section is compatible with the region. (Memory_region::get_last_section): New method. Returns the last section to use the region. (Memory_region::set_last_section): New method. Stores the last section to use the region. (Script_sections::block_in_region): New method. Returns true if a block of memory is contained within a region. (Script_sections::find_memory_region): New method. Locates a memory region to be used to set a VMA or LMA address. (Output_section_definition::set_section_addresses): Add code to check for addresses set by memory regions. (Output_segment::set_section_addresses): Remove memory region walking code. (Script_sections::create_segment): Add a warning if a header segment is created outside of any region. * script-sections.h (class Script_sections): Add prototypes for find_memory_region and block_in_region methods. * testsuite/memory_test.s: Use .long instead of .word. * testsuite/memory_test.t: Add some more output sections. * testsuite/memory_test.sh: Update expected output. * ld.texinfo: Update description of computation of VMA and LMA addresses for output sections. * ld-scripts/rgn-at5.t: Add some more output sections. * ld-scripts/rgn-at5.d: Update expected output.
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// Find a memory region by name.
Memory_region*
find_memory_region(const char*, size_t);
* script-sections.cc(class Memory_region): Remove current_lma_offset_ field. Rename current_vma_offset_ to current_offset_. Add last_section_ field. (Memory_region::get_current_vma_address): Rename to get_current_address. (Memory_region::get_current_lma_address): Delete. (Memory_region::increment_vma_offset): Rename to increment_offset. (Memory_region::increment_lma_offset): Delete. (Memory_region::attributes_compatible): New method. Returns true if the provided section is compatible with the region. (Memory_region::get_last_section): New method. Returns the last section to use the region. (Memory_region::set_last_section): New method. Stores the last section to use the region. (Script_sections::block_in_region): New method. Returns true if a block of memory is contained within a region. (Script_sections::find_memory_region): New method. Locates a memory region to be used to set a VMA or LMA address. (Output_section_definition::set_section_addresses): Add code to check for addresses set by memory regions. (Output_segment::set_section_addresses): Remove memory region walking code. (Script_sections::create_segment): Add a warning if a header segment is created outside of any region. * script-sections.h (class Script_sections): Add prototypes for find_memory_region and block_in_region methods. * testsuite/memory_test.s: Use .long instead of .word. * testsuite/memory_test.t: Add some more output sections. * testsuite/memory_test.sh: Update expected output. * ld.texinfo: Update description of computation of VMA and LMA addresses for output sections. * ld-scripts/rgn-at5.t: Add some more output sections. * ld-scripts/rgn-at5.d: Update expected output.
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// Find a memory region that should be used by a given output section.
Memory_region*
find_memory_region(Output_section_definition*, bool,
Output_section_definition**);
// Returns true if the provide block of memory is contained
// within a memory region.
bool
block_in_region(Symbol_table*, Layout*, uint64_t, uint64_t) const;
// Set the memory region of the section.
void
set_memory_region(Memory_region*, bool);
// Print the contents to the FILE. This is for debugging.
void
print(FILE*) const;
// Used for orphan sections.
typedef Sections_elements::iterator Elements_iterator;
private:
typedef std::vector<Memory_region*> Memory_regions;
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typedef std::vector<Phdrs_element*> Phdrs_elements;
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// Create segments.
Output_segment*
create_segments(Layout*, uint64_t);
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// Create PT_NOTE and PT_TLS segments.
void
create_note_and_tls_segments(Layout*, const std::vector<Output_section*>*);
// Return whether the section is a BSS section.
static bool
is_bss_section(const Output_section*);
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// Return the total size of the headers.
size_t
total_header_size(Layout* layout) const;
// Return the amount we have to subtract from the LMA to accomodate
// headers of the given size.
uint64_t
header_size_adjustment(uint64_t lma, size_t sizeof_headers) const;
// Create the segments from a PHDRS clause.
Output_segment*
create_segments_from_phdrs_clause(Layout* layout, uint64_t);
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// Attach sections to segments from a PHDRS clause.
void
attach_sections_using_phdrs_clause(Layout*);
// Set addresses of segments from a PHDRS clause.
Output_segment*
set_phdrs_clause_addresses(Layout*, uint64_t);
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// True if we ever saw a SECTIONS clause.
bool saw_sections_clause_;
// True if we are currently processing a SECTIONS clause.
bool in_sections_clause_;
// The list of elements in the SECTIONS clause.
Sections_elements* sections_elements_;
// The current output section, if there is one.
Output_section_definition* output_section_;
// The list of memory regions in the MEMORY clause.
Memory_regions* memory_regions_;
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// The list of program headers in the PHDRS clause.
Phdrs_elements* phdrs_elements_;
// Where to put orphan sections.
Orphan_section_placement* orphan_section_placement_;
// A pointer to the last Sections_element when we see
* layout.cc (Layout::attach_allocated_section_to_segment): Don't set tls_segment_ or relro_segment_. (Layout::make_output_segment): Set tls_segment_ and relro_segment_ when appropriate. * output.h (Output_section::clear_is_relro): New function. * output.cc (Output_segment::add_output_section): Handle SHF_TLS sections specially even when output_data_ is empty. (Output_segment::maximum_alignment): When first section is relro, only force alignment for PT_LOAD segments. * script.cc (script_data_segment_align): New function. (script_data_segment_relro_end): New function. * script-c.h (script_data_segment_align): Declare. (script_data_segment_relro_end): Declare. * script-sections.h (class Script_sections): Declare data_segment_align and data_segment_relro_end. Add fields segment_align_index_ and saw_relro_end_. * script-sections.cc (class Sections_element): Add set_is_relro virtual function. Add new bool* parameter to place_orphan_here. Add get_output_section virtual function. (class Output_section_definition): Add set_is_relro. Add new bool* parameter to place_orphan_here. Add get_output_section. Add is_relro_ field. (Output_section_definition::Output_section_definition): Initialize evaluated_address_, evaluated_load_address, evaluated_addralign_, and is_relro_ fields. (Output_section_definition::place_orphan_here): Add is_relro parameter. (Output_section_definition::set_section_addresses): Set relro for output section. (Output_section_definition::alternate_constraint): Likewise. (class Orphan_output_section): Add new bool* parameter to place_orphan_here. Add get_output_section. (Orphan_output_section::place_orphan_here): Add is_relro parameter. (Script_sections::Script_sections): Initialize data_segment_align_index_ and saw_relro_end_. (Script_sections::data_segment_align): New function. (Script_sections::data_segment_relro_end): New function. (Script_sections::place_orphan): Set or clear is_relro. (Script_sections::set_section_addresses): Force alignment of first TLS section. * yyscript.y (exp): Call script_data_segment_align and script_data_segment_relro_end. * testsuite/relro_script_test.t: New file. * testsuite/relro_test.cc (using_script): Declare. (t1, t2): Test using_script. * testsuite/Makefile.am (check_PROGRAMS): Add relro_script_test. (relro_script_test_SOURCES): Define. (relro_script_test_DEPENDENCIES): Define. (relro_script_test_LDFLAGS): Define. (relro_script_test_LDADD): Define. (relro_script_test.so): New target. * testsuite/Makefile.in: Rebuild.
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// DATA_SEGMENT_ALIGN.
Sections_elements::iterator data_segment_align_start_;
// Whether we have seen DATA_SEGMENT_ALIGN.
bool saw_data_segment_align_;
* layout.cc (Layout::attach_allocated_section_to_segment): Don't set tls_segment_ or relro_segment_. (Layout::make_output_segment): Set tls_segment_ and relro_segment_ when appropriate. * output.h (Output_section::clear_is_relro): New function. * output.cc (Output_segment::add_output_section): Handle SHF_TLS sections specially even when output_data_ is empty. (Output_segment::maximum_alignment): When first section is relro, only force alignment for PT_LOAD segments. * script.cc (script_data_segment_align): New function. (script_data_segment_relro_end): New function. * script-c.h (script_data_segment_align): Declare. (script_data_segment_relro_end): Declare. * script-sections.h (class Script_sections): Declare data_segment_align and data_segment_relro_end. Add fields segment_align_index_ and saw_relro_end_. * script-sections.cc (class Sections_element): Add set_is_relro virtual function. Add new bool* parameter to place_orphan_here. Add get_output_section virtual function. (class Output_section_definition): Add set_is_relro. Add new bool* parameter to place_orphan_here. Add get_output_section. Add is_relro_ field. (Output_section_definition::Output_section_definition): Initialize evaluated_address_, evaluated_load_address, evaluated_addralign_, and is_relro_ fields. (Output_section_definition::place_orphan_here): Add is_relro parameter. (Output_section_definition::set_section_addresses): Set relro for output section. (Output_section_definition::alternate_constraint): Likewise. (class Orphan_output_section): Add new bool* parameter to place_orphan_here. Add get_output_section. (Orphan_output_section::place_orphan_here): Add is_relro parameter. (Script_sections::Script_sections): Initialize data_segment_align_index_ and saw_relro_end_. (Script_sections::data_segment_align): New function. (Script_sections::data_segment_relro_end): New function. (Script_sections::place_orphan): Set or clear is_relro. (Script_sections::set_section_addresses): Force alignment of first TLS section. * yyscript.y (exp): Call script_data_segment_align and script_data_segment_relro_end. * testsuite/relro_script_test.t: New file. * testsuite/relro_test.cc (using_script): Declare. (t1, t2): Test using_script. * testsuite/Makefile.am (check_PROGRAMS): Add relro_script_test. (relro_script_test_SOURCES): Define. (relro_script_test_DEPENDENCIES): Define. (relro_script_test_LDFLAGS): Define. (relro_script_test_LDADD): Define. (relro_script_test.so): New target. * testsuite/Makefile.in: Rebuild.
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// Whether we have seen DATA_SEGMENT_RELRO_END.
bool saw_relro_end_;
2009-10-16 Doug Kwan <dougkwan@google.com> * expression.cc (class Segment_start_expression): New class definition. (Segment_start_expression::value): New method definition. (script_exp_function_segment_start): Return a new Segment_start_expression. * gold/script-c.h (script_saw_segment_start_expression): New function prototype. * script-sections.cc (Script_sections::Script_sections): Initialize SAW_SEGMENT_START_EXPRESSION_ to false. (Script_sections::set_section_addresses): Use -Ttext, -Tdata and -Tbbs options to specify section addresses if given in command line and no SEGMENT_START expression is seen in a script. * script-sections.h (Script_sections::saw_segment_start_expression, Script_sections::set_saw_segment_start_expression): New method definition. (Script_sections::saw_segment_start_expression_): New data member declaration. * script.cc (script_saw_segment_start_expression): New function. * yyscript.y (SEGMENT_START): Call script_saw_segment_start_expression. * testsuite/Makefile.am (check_SCRIPTS): Add script_test_6.sh, script_test_7.sh and script_test_8.sh. (check_DATA): Add script_test_6.stdout, script_test_7.stdout and script_test_8.stdout. (MOSTLYCLEANFILES): Add script_test_6, script_test_7 and script_test_8. (script_test_6, script_test_6.stdout, script_test_7, script_test_7.stdout, script_test_8, script_test_8.stdout): New rules. * Makefile.in: Regenerate. * testsuite/script_test_6.sh: New file. * testsuite/script_test_6.t: Same. * testsuite/script_test_7.sh: Same. * testsuite/script_test_7.t: Same. * testsuite/script_test_8.sh: Same.
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// Whether we have seen SEGMENT_START.
bool saw_segment_start_expression_;
};
// Attributes for memory regions.
enum
{
MEM_EXECUTABLE = (1 << 0),
MEM_WRITEABLE = (1 << 1),
MEM_READABLE = (1 << 2),
MEM_ALLOCATABLE = (1 << 3),
MEM_INITIALIZED = (1 << 4),
MEM_ATTR_MASK = (1 << 5) - 1
};
} // End namespace gold.
#endif // !defined(GOLD_SCRIPT_SECTIONS_H