// layout.h -- lay out output file sections for gold -*- C++ -*-
-// Copyright (C) 2006-2016 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.
// The PLT.
ORDER_PLT,
+ // The hot text sections, prefixed by .text.hot.
+ ORDER_TEXT_HOT,
+
// The regular text sections.
ORDER_TEXT,
+ // The startup text sections, prefixed by .text.startup.
+ ORDER_TEXT_STARTUP,
+
+ // The startup text sections, prefixed by .text.startup.
+ ORDER_TEXT_EXIT,
+
+ // The unlikely text sections, prefixed by .text.unlikely.
+ ORDER_TEXT_UNLIKELY,
+
// The .fini section.
ORDER_FINI,
Output_section*
layout(Sized_relobj_file<size, big_endian> *object, unsigned int shndx,
const char* name, const elfcpp::Shdr<size, big_endian>& shdr,
- unsigned int reloc_shndx, unsigned int reloc_type, off_t* offset);
+ unsigned int sh_type, unsigned int reloc_shndx,
+ unsigned int reloc_type, off_t* offset);
std::map<Section_id, unsigned int>*
get_section_order_map()
// and ALIGN are the extra flags and alignment of the segment.
struct Unique_segment_info
{
- // Identifier for the segment. ELF segments dont have names. This
+ // Identifier for the segment. ELF segments don't have names. This
// is used as the name of the output section mapped to the segment.
const char* name;
// Additional segment flags.
set_unique_segment_for_sections_specified()
{ this->unique_segment_for_sections_specified_ = true; }
+ bool
+ is_lto_slim_object () const
+ { return this->lto_slim_object_; }
+
+ void
+ set_lto_slim_object ()
+ { this->lto_slim_object_ = true; }
+
// For incremental updates, allocate a block of memory from the
// free list. Find a block starting at or after MINOFF.
off_t
size_t cie_length, const unsigned char* fde_data,
size_t fde_length);
+ // Remove all post-map .eh_frame information for a PLT.
+ void
+ remove_eh_frame_for_plt(Output_data* plt, const unsigned char* cie_data,
+ size_t cie_length);
+
// Scan a .debug_info or .debug_types section, and add summary
// information to the .gdb_index section.
template<int size, bool big_endian>
layout_gnu_stack(bool seen_gnu_stack, uint64_t gnu_stack_flags,
const Object*);
+ // Layout a .note.gnu.property section.
+ void
+ layout_gnu_property(unsigned int note_type,
+ unsigned int pr_type,
+ size_t pr_datasz,
+ const unsigned char* pr_data,
+ const Object* object);
+
+ // Merge per-object properties with program properties.
+ void
+ merge_gnu_properties(const Object* object);
+
+ // Add a target-specific property for the output .note.gnu.property section.
+ void
+ add_gnu_property(unsigned int note_type,
+ unsigned int pr_type,
+ size_t pr_datasz,
+ const unsigned char* pr_data);
+
// Add an Output_section_data to the layout. This is used for
// special sections like the GOT section. ORDER is where the
// section should wind up in the output segment. IS_RELRO is true
const Output_data_reloc_generic* dyn_rel,
bool add_debug, bool dynrel_includes_plt);
+ // Add a target-specific dynamic tag with constant value.
+ void
+ add_target_specific_dynamic_tag(elfcpp::DT tag, unsigned int val);
+
// Compute and write out the build ID if needed.
void
write_build_id(Output_file*, unsigned char*, size_t) const;
};
static const Section_name_mapping section_name_mapping[];
static const int section_name_mapping_count;
+ static const Section_name_mapping text_section_name_mapping[];
+ static const int text_section_name_mapping_count;
+
+ // Find section name NAME in map and return the mapped name if found
+ // with the length set in PLEN.
+ static const char* match_section_name(const Section_name_mapping* map,
+ const int count, const char* name,
+ size_t* plen);
// During a relocatable link, a list of group sections and
// signatures.
create_note(const char* name, int note_type, const char* section_name,
size_t descsz, bool allocate, size_t* trailing_padding);
+ // Create a note section for gnu program properties.
+ void
+ create_gnu_properties_note();
+
// Create a note section for gold version.
void
create_gold_note();
- // Record whether the stack must be executable.
+ // Record whether the stack must be executable, and a user-supplied size.
void
- create_executable_stack_info();
+ create_stack_segment();
// Create a build ID note if needed.
void
// Create the output sections for the symbol table.
void
create_symtab_sections(const Input_objects*, Symbol_table*,
- unsigned int, off_t*);
+ unsigned int, off_t*, unsigned int);
// Create the .shstrtab section.
Output_section*
create_dynamic_symtab(const Input_objects*, Symbol_table*,
Output_section** pdynstr,
unsigned int* plocal_dynamic_count,
+ unsigned int* pforced_local_dynamic_count,
std::vector<Symbol*>* pdynamic_symbols,
Versions* versions);
choose_output_section(const Relobj* relobj, const char* name,
elfcpp::Elf_Word type, elfcpp::Elf_Xword flags,
bool is_input_section, Output_section_order order,
- bool is_relro);
+ bool is_relro, bool is_reloc, bool match_input_spec);
// Create a new Output_section.
Output_section*
std::vector<Section_info> section_infos_;
};
+ // Program properties from .note.gnu.property sections.
+ struct Gnu_property
+ {
+ size_t pr_datasz;
+ unsigned char* pr_data;
+ };
+ typedef std::map<unsigned int, Gnu_property> Gnu_properties;
+
// The number of input files, for sizing tables.
int number_of_input_files_;
// Information set by scripts or by command line options.
Incremental_inputs* incremental_inputs_;
// Whether we record output section data created in script
bool record_output_section_data_from_script_;
+ // Set if this is a slim LTO object not loaded with a compiler plugin
+ bool lto_slim_object_;
// List of output data that needs to be removed at relaxation clean up.
Output_section_data_list script_output_section_data_list_;
// Structure to save segment states before entering the relaxation loop.
Incremental_binary* incremental_base_;
// For incremental links, a list of free space within the file.
Free_list free_list_;
+ // Program properties.
+ Gnu_properties gnu_properties_;
};
// This task handles writing out data in output sections which is not
projects / deliverable / binutils-gdb.git / blobdiff