diff options
Diffstat (limited to 'gold/object.h')
| -rw-r--r-- | gold/object.h | 171 |
1 files changed, 146 insertions, 25 deletions
diff --git a/gold/object.h b/gold/object.h index 59b723f..99ceabf 100644 --- a/gold/object.h +++ b/gold/object.h @@ -387,6 +387,18 @@ class Object section_addralign(unsigned int shndx) { return this->do_section_addralign(shndx); } + // Return the output section given a section index. + Output_section* + output_section(unsigned int shndx) const + { return this->do_output_section(shndx); } + + // Given a section index, return the offset in the Output_section. + // The return value will be -1U if the section is specially mapped, + // such as a merge section. + uint64_t + output_section_offset(unsigned int shndx) const + { return this->do_output_section_offset(shndx); } + // Read the symbol information. void read_symbols(Read_symbols_data* sd) @@ -525,6 +537,16 @@ class Object section_size_type* uncompressed_size) const { return this->do_section_is_compressed(shndx, uncompressed_size); } + // Return the index of the first incremental relocation for symbol SYMNDX. + unsigned int + get_incremental_reloc_base(unsigned int symndx) const + { return this->do_get_incremental_reloc_base(symndx); } + + // Return the number of incremental relocations for symbol SYMNDX. + unsigned int + get_incremental_reloc_count(unsigned int symndx) const + { return this->do_get_incremental_reloc_count(symndx); } + protected: // Returns NULL for Objects that are not plugin objects. This method // is overridden in the Pluginobj class. @@ -590,6 +612,17 @@ class Object virtual uint64_t do_section_addralign(unsigned int shndx) = 0; + // Return the output section given a section index--implemented + // by child class. + virtual Output_section* + do_output_section(unsigned int) const + { gold_unreachable(); } + + // Get the offset of a section--implemented by child class. + virtual uint64_t + do_output_section_offset(unsigned int) const + { gold_unreachable(); } + // Return the Xindex structure to use. virtual Xindex* do_initialize_xindex() = 0; @@ -641,6 +674,18 @@ class Object do_section_is_compressed(unsigned int, section_size_type*) const { return false; } + // Return the index of the first incremental relocation for symbol SYMNDX-- + // implemented by child class. + virtual unsigned int + do_get_incremental_reloc_base(unsigned int) const + { gold_unreachable(); } + + // Return the number of incremental relocations for symbol SYMNDX-- + // implemented by child class. + virtual unsigned int + do_get_incremental_reloc_count(unsigned int) const + { gold_unreachable(); } + private: // This class may not be copied. Object(const Object&); @@ -685,7 +730,9 @@ class Relobj : public Object map_to_relocatable_relocs_(NULL), object_merge_map_(NULL), relocs_must_follow_section_writes_(false), - sd_(NULL) + sd_(NULL), + reloc_counts_(NULL), + reloc_bases_(NULL) { } // During garbage collection, the Read_symbols_data pass for @@ -781,16 +828,6 @@ class Relobj : public Object return this->output_sections_[shndx] != NULL; } - // Given a section index, return the corresponding Output_section. - // The return value will be NULL if the section is not included in - // the link. - Output_section* - output_section(unsigned int shndx) const - { - gold_assert(shndx < this->output_sections_.size()); - return this->output_sections_[shndx]; - } - // The the output section of the input section with index SHNDX. // This is only used currently to remove a section from the link in // relaxation. @@ -801,13 +838,6 @@ class Relobj : public Object this->output_sections_[shndx] = os; } - // Given a section index, return the offset in the Output_section. - // The return value will be -1U if the section is specially mapped, - // such as a merge section. - uint64_t - output_section_offset(unsigned int shndx) const - { return this->do_output_section_offset(shndx); } - // Set the offset of an input section within its output section. void set_section_offset(unsigned int shndx, uint64_t off) @@ -856,6 +886,16 @@ class Relobj : public Object layout_deferred_sections(Layout* layout) { this->do_layout_deferred_sections(layout); } + // Return the index of the first incremental relocation for symbol SYMNDX. + virtual unsigned int + do_get_incremental_reloc_base(unsigned int symndx) const + { return this->reloc_bases_[symndx]; } + + // Return the number of incremental relocations for symbol SYMNDX. + virtual unsigned int + do_get_incremental_reloc_count(unsigned int symndx) const + { return this->reloc_counts_[symndx]; } + protected: // The output section to be used for each input section, indexed by // the input section number. The output section is NULL if the @@ -902,10 +942,6 @@ class Relobj : public Object virtual void do_relocate(const Symbol_table* symtab, const Layout*, Output_file* of) = 0; - // Get the offset of a section--implemented by child class. - virtual uint64_t - do_output_section_offset(unsigned int shndx) const = 0; - // Set the offset of a section--implemented by child class. virtual void do_set_section_offset(unsigned int shndx, uint64_t off) = 0; @@ -915,6 +951,16 @@ class Relobj : public Object virtual void do_layout_deferred_sections(Layout*) = 0; + // Given a section index, return the corresponding Output_section. + // The return value will be NULL if the section is not included in + // the link. + Output_section* + do_output_section(unsigned int shndx) const + { + gold_assert(shndx < this->output_sections_.size()); + return this->output_sections_[shndx]; + } + // Return the vector mapping input sections to output sections. Output_sections& output_sections() @@ -938,6 +984,46 @@ class Relobj : public Object set_relocs_must_follow_section_writes() { this->relocs_must_follow_section_writes_ = true; } + // Allocate the array for counting incremental relocations. + void + allocate_incremental_reloc_counts() + { + unsigned int nsyms = this->do_get_global_symbols()->size(); + this->reloc_counts_ = new unsigned int[nsyms]; + gold_assert(this->reloc_counts_ != NULL); + memset(this->reloc_counts_, 0, nsyms * sizeof(unsigned int)); + } + + // Record a relocation in this object referencing global symbol SYMNDX. + // Used for tracking incremental link information. + void + count_incremental_reloc(unsigned int symndx) + { + unsigned int nsyms = this->do_get_global_symbols()->size(); + gold_assert(symndx < nsyms); + gold_assert(this->reloc_counts_ != NULL); + ++this->reloc_counts_[symndx]; + } + + // Finalize the incremental relocation information. + void + finalize_incremental_relocs(Layout* layout); + + // Return the index of the next relocation to be written for global symbol + // SYMNDX. Only valid after finalize_incremental_relocs() has been called. + unsigned int + next_incremental_reloc_index(unsigned int symndx) + { + unsigned int nsyms = this->do_get_global_symbols()->size(); + + gold_assert(this->reloc_counts_ != NULL); + gold_assert(this->reloc_bases_ != NULL); + gold_assert(symndx < nsyms); + + unsigned int counter = this->reloc_counts_[symndx]++; + return this->reloc_bases_[symndx] + counter; + } + private: // Mapping from input sections to output section. Output_sections output_sections_; @@ -957,6 +1043,10 @@ class Relobj : public Object // Again used during garbage collection when laying out referenced // sections. gold::Symbols_data *sd_; + // Per-symbol counts of relocations, for incremental links. + unsigned int* reloc_counts_; + // Per-symbol base indexes of relocations, for incremental links. + unsigned int* reloc_bases_; }; // This class is used to handle relocations against a section symbol @@ -1792,7 +1882,8 @@ class Sized_relobj : public Relobj // This may be overriden by a child class. virtual void do_relocate_sections(const Symbol_table* symtab, const Layout* layout, - const unsigned char* pshdrs, Views* pviews); + const unsigned char* pshdrs, Output_file* of, + Views* pviews); // Allow a child to set output local symbol count. void @@ -1880,8 +1971,9 @@ class Sized_relobj : public Relobj // Relocate the sections in the output file. void relocate_sections(const Symbol_table* symtab, const Layout* layout, - const unsigned char* pshdrs, Views* pviews) - { this->do_relocate_sections(symtab, layout, pshdrs, pviews); } + const unsigned char* pshdrs, Output_file* of, + Views* pviews) + { this->do_relocate_sections(symtab, layout, pshdrs, of, pviews); } // Scan the input relocations for --emit-relocs. void @@ -1918,6 +2010,35 @@ class Sized_relobj : public Relobj unsigned char* reloc_view, section_size_type reloc_view_size); + // Scan the input relocations for --incremental. + void + incremental_relocs_scan(const Read_relocs_data::Relocs_list::iterator&); + + // Scan the input relocations for --incremental, templatized on the + // type of the relocation section. + template<int sh_type> + void + incremental_relocs_scan_reltype( + const Read_relocs_data::Relocs_list::iterator&); + + void + incremental_relocs_write(const Relocate_info<size, big_endian>*, + unsigned int sh_type, + const unsigned char* prelocs, + size_t reloc_count, + Output_section*, + Address output_offset, + Output_file*); + + template<int sh_type> + void + incremental_relocs_write_reltype(const Relocate_info<size, big_endian>*, + const unsigned char* prelocs, + size_t reloc_count, + Output_section*, + Address output_offset, + Output_file*); + // A type shared by split_stack_adjust_reltype and find_functions. typedef std::map<section_offset_type, section_size_type> Function_offsets; |