// merge.h -- handle section merging for gold -*- C++ -*-
-// Copyright 2006, 2007 Free Software Foundation, Inc.
+// Copyright (C) 2006-2014 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// For each object with merge sections, we store an Object_merge_map.
// This is used to map locations in input sections to a merged output
// section. The output section itself is not recorded here--it can be
-// found in the map_to_output_ field of the Object.
+// found in the output_sections_ field of the Object.
class Object_merge_map
{
bool
get_output_offset(const Merge_map*, unsigned int shndx,
section_offset_type offset,
- section_offset_type *output_offset);
+ section_offset_type* output_offset);
// Return whether this is the merge map for section SHNDX.
bool
Input_merge_map*
get_input_merge_map(unsigned int shndx);
- // Get or make the the Input_merge_map to use for the section SHNDX
+ // Get or make the Input_merge_map to use for the section SHNDX
// with MERGE_MAP.
Input_merge_map*
get_or_make_input_merge_map(const Merge_map* merge_map, unsigned int shndx);
bool
get_output_offset(const Relobj* object, unsigned int shndx,
section_offset_type offset,
- section_offset_type *output_offset) const;
+ section_offset_type* output_offset) const;
// Return whether this is the merge mapping for section SHNDX in
// OBJECT. This should return true when get_output_offset would
{
public:
Output_merge_base(uint64_t entsize, uint64_t addralign)
- : Output_section_data(addralign), merge_map_(), entsize_(entsize)
+ : Output_section_data(addralign), merge_map_(), entsize_(entsize),
+ keeps_input_sections_(false), first_relobj_(NULL), first_shndx_(-1),
+ input_sections_()
{ }
+ // Return the entry size.
+ uint64_t
+ entsize() const
+ { return this->entsize_; }
+
+ // Whether this is a merge string section. This is only true of
+ // Output_merge_string.
+ bool
+ is_string()
+ { return this->do_is_string(); }
+
+ // Whether this keeps input sections.
+ bool
+ keeps_input_sections() const
+ { return this->keeps_input_sections_; }
+
+ // Set the keeps-input-sections flag. This is virtual so that sub-classes
+ // can perform additional checks.
+ void
+ set_keeps_input_sections()
+ { this->do_set_keeps_input_sections(); }
+
+ // Return the object of the first merged input section. This used
+ // for script processing. This is NULL if merge section is empty.
+ Relobj*
+ first_relobj() const
+ { return this->first_relobj_; }
+
+ // Return the section index of the first merged input section. This
+ // is used for script processing. This is valid only if merge section
+ // is not valid.
+ unsigned int
+ first_shndx() const
+ {
+ gold_assert(this->first_relobj_ != NULL);
+ return this->first_shndx_;
+ }
+
+ // Set of merged input sections.
+ typedef Unordered_set<Section_id, Section_id_hash> Input_sections;
+
+ // Beginning of merged input sections.
+ Input_sections::const_iterator
+ input_sections_begin() const
+ {
+ gold_assert(this->keeps_input_sections_);
+ return this->input_sections_.begin();
+ }
+
+ // Beginning of merged input sections.
+ Input_sections::const_iterator
+ input_sections_end() const
+ {
+ gold_assert(this->keeps_input_sections_);
+ return this->input_sections_.end();
+ }
+
protected:
// Return the output offset for an input offset.
bool
bool
do_is_merge_section_for(const Relobj*, unsigned int shndx) const;
- // Return the entry size.
- uint64_t
- entsize() const
- { return this->entsize_; }
-
// Add a mapping from an OFFSET in input section SHNDX in object
// OBJECT to an OUTPUT_OFFSET in the output section. OUTPUT_OFFSET
// is the offset from the start of the merged data in the output
this->merge_map_.add_mapping(object, shndx, offset, length, output_offset);
}
+ // This may be overridden by the child class.
+ virtual bool
+ do_is_string()
+ { return false; }
+
+ // This may be overridden by the child class.
+ virtual void
+ do_set_keeps_input_sections()
+ { this->keeps_input_sections_ = true; }
+
+ // Record the merged input section for script processing.
+ void
+ record_input_section(Relobj* relobj, unsigned int shndx);
+
private:
// A mapping from input object/section/offset to offset in output
// section.
// The entry size. For fixed-size constants, this is the size of
// the constants. For strings, this is the size of a character.
uint64_t entsize_;
+ // Whether we keep input sections.
+ bool keeps_input_sections_;
+ // Object of the first merged input section. We use this for script
+ // processing.
+ Relobj* first_relobj_;
+ // Section index of the first merged input section.
+ unsigned int first_shndx_;
+ // Input sections. We only keep them is keeps_input_sections_ is true.
+ Input_sections input_sections_;
};
// Handle SHF_MERGE sections with fixed-size constant data.
void
do_write_to_buffer(unsigned char*);
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** merge constants")); }
+
// Print merge stats to stderr.
void
do_print_merge_stats(const char* section_name);
+ // Set keeps-input-sections flag.
+ void
+ do_set_keeps_input_sections()
+ {
+ gold_assert(this->input_count_ == 0);
+ Output_merge_base::do_set_keeps_input_sections();
+ }
+
private:
// We build a hash table of the fixed-size constants. Each constant
// is stored as a pointer into the section data we are accumulating.
{
public:
Output_merge_string(uint64_t addralign)
- : Output_merge_base(sizeof(Char_type), addralign), stringpool_(),
- merged_strings_(), input_count_(0)
+ : Output_merge_base(sizeof(Char_type), addralign), stringpool_(addralign),
+ merged_strings_lists_(), input_count_(0), input_size_(0)
{
- gold_assert(addralign <= sizeof(Char_type));
this->stringpool_.set_no_zero_null();
}
void
do_write_to_buffer(unsigned char*);
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** merge strings")); }
+
// Print merge stats to stderr.
void
do_print_merge_stats(const char* section_name);
clear_stringpool()
{ this->stringpool_.clear(); }
+ // Whether this is a merge string section.
+ virtual bool
+ do_is_string()
+ { return true; }
+
+ // Set keeps-input-sections flag.
+ void
+ do_set_keeps_input_sections()
+ {
+ gold_assert(this->input_count_ == 0);
+ Output_merge_base::do_set_keeps_input_sections();
+ }
+
private:
// The name of the string type, for stats.
const char*
// index and offset to strings.
struct Merged_string
{
- // The input object where the string was found.
- Relobj* object;
- // The input section in the input object.
- unsigned int shndx;
// The offset in the input section.
section_offset_type offset;
- // The string itself, a pointer into a Stringpool.
- const Char_type* string;
- // The length of the string in bytes, including the null terminator.
- size_t length;
// The key in the Stringpool.
Stringpool::Key stringpool_key;
- Merged_string(Relobj *objecta, unsigned int shndxa,
- section_offset_type offseta, const Char_type* stringa,
- size_t lengtha, Stringpool::Key stringpool_keya)
- : object(objecta), shndx(shndxa), offset(offseta), string(stringa),
- length(lengtha), stringpool_key(stringpool_keya)
+ Merged_string(section_offset_type offseta, Stringpool::Key stringpool_keya)
+ : offset(offseta), stringpool_key(stringpool_keya)
{ }
};
typedef std::vector<Merged_string> Merged_strings;
+ struct Merged_strings_list
+ {
+ // The input object where the strings were found.
+ Relobj* object;
+ // The input section in the input object.
+ unsigned int shndx;
+ // The list of merged strings.
+ Merged_strings merged_strings;
+
+ Merged_strings_list(Relobj* objecta, unsigned int shndxa)
+ : object(objecta), shndx(shndxa), merged_strings()
+ { }
+ };
+
+ typedef std::vector<Merged_strings_list*> Merged_strings_lists;
+
// As we see the strings, we add them to a Stringpool.
Stringpool_template<Char_type> stringpool_;
// Map from a location in an input object to an entry in the
// Stringpool.
- Merged_strings merged_strings_;
+ Merged_strings_lists merged_strings_lists_;
// The number of entries seen in input files.
size_t input_count_;
+ // The total size of input sections.
+ size_t input_size_;
};
} // End namespace gold.
projects / platform / upstream / binutils.git / blobdiff