diff options
Diffstat (limited to 'gold/object.h')
| -rw-r--r-- | gold/object.h | 68 |
1 files changed, 67 insertions, 1 deletions
diff --git a/gold/object.h b/gold/object.h index 6c8c7a3..614a02e 100644 --- a/gold/object.h +++ b/gold/object.h @@ -1,6 +1,6 @@ // object.h -- support for an object file for linking in gold -*- C++ -*- -// Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc. // Written by Ian Lance Taylor <iant@google.com>. // This file is part of gold. @@ -46,6 +46,7 @@ class Pluginobj; class Dynobj; class Object_merge_map; class Relocatable_relocs; +class Symbols_data; template<typename Stringpool_char> class Stringpool_template; @@ -598,11 +599,52 @@ class Relobj : public Object relocs_must_follow_section_writes_(false) { } + // During garbage collection, the Read_symbols_data pass for + // each object is stored as layout needs to be done after + // reloc processing. + Symbols_data* + get_symbols_data() + { return this->sd_; } + + // Decides which section names have to be included in the worklist + // as roots. + bool + is_section_name_included(const char *name); + + void + copy_symbols_data(Symbols_data* gc_sd, Read_symbols_data* sd, + unsigned int section_header_size); + + void + set_symbols_data(Symbols_data* sd) + { this->sd_ = sd; } + + // During garbage collection, the Read_relocs pass for all objects + // is done before scanning the relocs. In that case, this->rd_ is + // used to store the information from Read_relocs for each object. + // This data is also used to compute the list of relevant sections. + Read_relocs_data* + get_relocs_data() + { return this->rd_; } + + void + set_relocs_data(Read_relocs_data* rd) + { this->rd_ = rd; } + + virtual bool + is_output_section_offset_invalid(unsigned int shndx) const = 0; + // Read the relocs. void read_relocs(Read_relocs_data* rd) { return this->do_read_relocs(rd); } + // Process the relocs, during garbage collection only. + void + gc_process_relocs(const General_options& options, Symbol_table* symtab, + Layout* layout, Read_relocs_data* rd) + { return this->do_gc_process_relocs(options, symtab, layout, rd); } + // Scan the relocs and adjust the symbol table. void scan_relocs(const General_options& options, Symbol_table* symtab, @@ -728,6 +770,11 @@ class Relobj : public Object virtual void do_read_relocs(Read_relocs_data*) = 0; + // Process the relocs--implemented by child class. + virtual void + do_gc_process_relocs(const General_options&, Symbol_table*, Layout*, + Read_relocs_data*) = 0; + // Scan the relocs--implemented by child class. virtual void do_scan_relocs(const General_options&, Symbol_table*, Layout*, @@ -810,6 +857,13 @@ class Relobj : public Object // Whether we need to wait for output sections to be written before // we can apply relocations. bool relocs_must_follow_section_writes_; + // Used to store the relocs data computed by the Read_relocs pass. + // Used during garbage collection of unused sections. + Read_relocs_data* rd_; + // Used to store the symbols data computed by the Read_symbols pass. + // Again used during garbage collection when laying out referenced + // sections. + gold::Symbols_data *sd_; }; // This class is used to handle relocations against a section symbol @@ -1220,6 +1274,12 @@ class Sized_relobj : public Relobj ~Sized_relobj(); + // Checks if the offset of input section SHNDX within its output + // section is invalid. + bool + is_output_section_offset_invalid(unsigned int shndx) const + { return this->get_output_section_offset(shndx) == invalid_address; } + // Set up the object file based on the ELF header. void setup(const typename elfcpp::Ehdr<size, big_endian>&); @@ -1392,6 +1452,12 @@ class Sized_relobj : public Relobj void do_read_relocs(Read_relocs_data*); + // Process the relocs to find list of referenced sections. Used only + // during garbage collection. + void + do_gc_process_relocs(const General_options&, Symbol_table*, Layout*, + Read_relocs_data*); + // Scan the relocs and adjust the symbol table. void do_scan_relocs(const General_options&, Symbol_table*, Layout*, |