diff options
Diffstat (limited to 'gold/object.h')
| -rw-r--r-- | gold/object.h | 133 |
1 files changed, 119 insertions, 14 deletions
diff --git a/gold/object.h b/gold/object.h index ca227c5..49a1ce9 100644 --- a/gold/object.h +++ b/gold/object.h @@ -4,6 +4,8 @@ #define GOLD_OBJECT_H #include <cassert> +#include <list> +#include <string> #include <vector> #include "elfcpp.h" @@ -14,6 +16,7 @@ namespace gold { +class General_options; class Stringpool; class Layout; class Output_section; @@ -39,6 +42,35 @@ struct Read_symbols_data off_t symbol_names_size; }; +// Data about a single relocation section. This is read in +// read_relocs and processed in scan_relocs. + +struct Section_relocs +{ + // Index of reloc section. + unsigned int reloc_shndx; + // Index of section that relocs apply to. + unsigned int data_shndx; + // Contents of reloc section. + File_view* contents; + // Reloc section type. + unsigned int sh_type; + // Number of reloc entries. + size_t reloc_count; +}; + +// Relocations in an object file. This is read in read_relocs and +// processed in scan_relocs. + +struct Read_relocs_data +{ + typedef std::vector<Section_relocs> Relocs_list; + // The relocations. + Relocs_list relocs; + // The local symbols. + File_view* local_symbols; +}; + // Object is an interface which represents either a 32-bit or a 64-bit // input object. This can be a regular object file (ET_REL) or a // shared object (ET_DYN). The actual instantiations are @@ -98,21 +130,32 @@ class Object Sized_target<size, big_endian>* sized_target(ACCEPT_SIZE_ENDIAN_ONLY); - // Read the symbol and relocation information. + // Read the symbol information. void read_symbols(Read_symbols_data* sd) { return this->do_read_symbols(sd); } + // Pass sections which should be included in the link to the Layout + // object, and record where the sections go in the output file. + void + layout(Layout* lay, Read_symbols_data* sd) + { this->do_layout(lay, sd); } + // Add symbol information to the global symbol table. void add_symbols(Symbol_table* symtab, Read_symbols_data* sd) { this->do_add_symbols(symtab, sd); } - // Pass sections which should be included in the link to the Layout - // object, and record where the sections go in the output file. + // Read the relocs. void - layout(Layout* lay, Read_symbols_data* sd) - { this->do_layout(lay, sd); } + read_relocs(Read_relocs_data* rd) + { return this->do_read_relocs(rd); } + + // Scan the relocs and adjust the symbol table. + void + scan_relocs(const General_options& options, Symbol_table* symtab, + Read_relocs_data* rd) + { return this->do_scan_relocs(options, symtab, rd); } // Initial local symbol processing: set the offset where local // symbol information will be stored; add local symbol names to @@ -124,8 +167,8 @@ class Object // Relocate the input sections and write out the local symbols. void relocate(const General_options& options, const Symbol_table* symtab, - const Stringpool* sympool, Output_file* of) - { return this->do_relocate(options, symtab, sympool, of); } + const Layout* layout, Output_file* of) + { return this->do_relocate(options, symtab, layout, of); } // Return whether an input section is being included in the link. bool @@ -141,6 +184,12 @@ class Object inline Output_section* output_section(unsigned int shnum, off_t* poff); + // Return the name of a section given a section index. This is only + // used for error messages. + std::string + section_name(unsigned int shnum) + { return this->do_section_name(shnum); } + protected: // What we need to know to map an input section to an output // section. We keep an array of these, one for each input section, @@ -163,6 +212,14 @@ class Object virtual void do_add_symbols(Symbol_table*, Read_symbols_data*) = 0; + // Read the relocs--implemented by child class. + virtual void + do_read_relocs(Read_relocs_data*) = 0; + + // Scan the relocs--implemented by child class. + virtual void + do_scan_relocs(const General_options&, Symbol_table*, Read_relocs_data*) = 0; + // Lay out sections--implemented by child class. virtual void do_layout(Layout*, Read_symbols_data*) = 0; @@ -175,7 +232,11 @@ class Object // symbols--implemented by child class. virtual void do_relocate(const General_options& options, const Symbol_table* symtab, - const Stringpool*, Output_file* of) = 0; + const Layout*, Output_file* of) = 0; + + // Get the name of a section--implemented by child class. + virtual std::string + do_section_name(unsigned int shnum) = 0; // Get the file. Input_file* @@ -282,14 +343,22 @@ class Sized_object : public Object void do_read_symbols(Read_symbols_data*); - // Lay out the input sections. - void - do_layout(Layout*, Read_symbols_data*); - // Add the symbols to the symbol table. void do_add_symbols(Symbol_table*, Read_symbols_data*); + // Read the relocs. + void + do_read_relocs(Read_relocs_data*); + + // Scan the relocs and adjust the symbol table. + void + do_scan_relocs(const General_options&, Symbol_table*, Read_relocs_data*); + + // Lay out the input sections. + void + do_layout(Layout*, Read_symbols_data*); + // Finalize the local symbols. off_t do_finalize_local_symbols(off_t, Stringpool*); @@ -297,7 +366,11 @@ class Sized_object : public Object // Relocate the input sections and write out the local symbols. void do_relocate(const General_options& options, const Symbol_table* symtab, - const Stringpool*, Output_file* of); + const Layout*, Output_file* of); + + // Get the name of a section. + std::string + do_section_name(unsigned int shnum); // Return the appropriate Sized_target structure. Sized_target<size, big_endian>* @@ -352,7 +425,8 @@ class Sized_object : public Object // Relocate the sections in the output file. void - relocate_sections(const Symbol_table*, const unsigned char* pshdrs, Views*); + relocate_sections(const General_options& options, const Symbol_table*, + const Layout*, const unsigned char* pshdrs, Views*); // Write out the local symbols. void @@ -424,6 +498,37 @@ class Input_objects bool any_dynamic_; }; +// Some of the information we pass to the relocation routines. We +// group this together to avoid passing a dozen different arguments. + +template<int size, bool big_endian> +struct Relocate_info +{ + // Command line options. + const General_options* options; + // Symbol table. + const Symbol_table* symtab; + // Layout. + const Layout* layout; + // Object being relocated. + Sized_object<size, big_endian>* object; + // Number of local symbols. + unsigned int local_symbol_count; + // Values of local symbols. + typename elfcpp::Elf_types<size>::Elf_Addr *values; + // Global symbols. + Symbol** symbols; + // Section index of relocation section. + unsigned int reloc_shndx; + // Section index of section being relocated. + unsigned int data_shndx; + + // Return a string showing the location of a relocation. This is + // only used for error messages. + std::string + location(size_t relnum, off_t reloffset) const; +}; + // Return an Object appropriate for the input file. P is BYTES long, // and holds the ELF header. |