X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gold%2Ftarget.h;h=e3805910301f392275bab8b0872a4ceb8e0c74bc;hb=32127f9a02101f94a3c5ae78fc35c17bc55053c8;hp=81c8114e5f2883c05f4b0c43f9fccc484bb4dafa;hpb=2e702c99c59f581594820852c607394c25bc9bd2;p=platform%2Fupstream%2Fbinutils.git diff --git a/gold/target.h b/gold/target.h index 81c8114..e380591 100644 --- a/gold/target.h +++ b/gold/target.h @@ -1,7 +1,6 @@ // target.h -- target support for gold -*- C++ -*- -// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012 -// Free Software Foundation, Inc. +// Copyright (C) 2006-2014 Free Software Foundation, Inc. // Written by Ian Lance Taylor . // This file is part of gold. @@ -37,6 +36,7 @@ #include "elfcpp.h" #include "options.h" #include "parameters.h" +#include "stringpool.h" #include "debug.h" namespace gold @@ -61,6 +61,8 @@ class Output_data_got_base; class Output_section; class Input_objects; class Task; +struct Symbol_location; +class Versions; // The abstract class for target specific handling. @@ -237,9 +239,15 @@ class Target // Adjust the output file header before it is written out. VIEW // points to the header in external form. LEN is the length. void - adjust_elf_header(unsigned char* view, int len) const + adjust_elf_header(unsigned char* view, int len) { return this->do_adjust_elf_header(view, len); } + // Return address and size to plug into eh_frame FDEs associated with a PLT. + void + plt_fde_location(const Output_data* plt, unsigned char* oview, + uint64_t* address, off_t* len) const + { return this->do_plt_fde_location(plt, oview, address, len); } + // Return whether NAME is a local label name. This is used to implement the // --discard-locals options. bool @@ -256,20 +264,36 @@ class Target reloc_addend(void* arg, unsigned int type, uint64_t addend) const { return this->do_reloc_addend(arg, type, addend); } - // Return the PLT address to use for a global symbol. This is used - // for STT_GNU_IFUNC symbols. The symbol's plt_offset is relative - // to this PLT address. + // Return the PLT address to use for a global symbol. uint64_t plt_address_for_global(const Symbol* sym) const { return this->do_plt_address_for_global(sym); } - // Return the PLT address to use for a local symbol. This is used - // for STT_GNU_IFUNC symbols. The symbol's plt_offset is relative - // to this PLT address. + // Return the PLT address to use for a local symbol. uint64_t plt_address_for_local(const Relobj* object, unsigned int symndx) const { return this->do_plt_address_for_local(object, symndx); } + // Return the offset to use for the GOT_INDX'th got entry which is + // for a local tls symbol specified by OBJECT, SYMNDX. + int64_t + tls_offset_for_local(const Relobj* object, + unsigned int symndx, + unsigned int got_indx) const + { return do_tls_offset_for_local(object, symndx, got_indx); } + + // Return the offset to use for the GOT_INDX'th got entry which is + // for global tls symbol GSYM. + int64_t + tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const + { return do_tls_offset_for_global(gsym, got_indx); } + + // For targets that use function descriptors, if LOC is the location + // of a function, modify it to point at the function entry location. + void + function_location(Symbol_location* loc) const + { return do_function_location(loc); } + // Return whether this target can use relocation types to determine // if a function's address is taken. bool @@ -412,6 +436,55 @@ class Target define_standard_symbols(Symbol_table* symtab, Layout* layout) { this->do_define_standard_symbols(symtab, layout); } + // Return the output section name to use given an input section + // name, or NULL if no target specific name mapping is required. + // Set *PLEN to the length of the name if returning non-NULL. + const char* + output_section_name(const Relobj* relobj, + const char* name, + size_t* plen) const + { return this->do_output_section_name(relobj, name, plen); } + + // Add any special sections for this symbol to the gc work list. + void + gc_mark_symbol(Symbol_table* symtab, Symbol* sym) const + { this->do_gc_mark_symbol(symtab, sym); } + + // Return the name of the entry point symbol. + const char* + entry_symbol_name() const + { return this->pti_->entry_symbol_name; } + + // Whether the target has a custom set_dynsym_indexes method. + bool + has_custom_set_dynsym_indexes() const + { return this->do_has_custom_set_dynsym_indexes(); } + + // Custom set_dynsym_indexes method for a target. + unsigned int + set_dynsym_indexes(std::vector* dyn_symbols, unsigned int index, + std::vector* syms, Stringpool* dynpool, + Versions* versions, Symbol_table* symtab) const + { + return this->do_set_dynsym_indexes(dyn_symbols, index, syms, dynpool, + versions, symtab); + } + + // Get the custom dynamic tag value. + unsigned int + dynamic_tag_custom_value(elfcpp::DT tag) const + { return this->do_dynamic_tag_custom_value(tag); } + + // Adjust the value written to the dynamic symbol table. + void + adjust_dyn_symbol(const Symbol* sym, unsigned char* view) const + { this->do_adjust_dyn_symbol(sym, view); } + + // Return whether to include the section in the link. + bool + should_include_section(elfcpp::Elf_Word sh_type) const + { return this->do_should_include_section(sh_type); } + protected: // This struct holds the constant information for a child class. We // use a struct to avoid the overhead of virtual function calls for @@ -465,6 +538,8 @@ class Target const char* attributes_section; // Vendor name of vendor attributes. const char* attributes_vendor; + // Name of the main entry point to the program. + const char* entry_symbol_name; }; Target(const Target_info* pti) @@ -504,7 +579,12 @@ class Target // By default, we set the EI_OSABI field if requested (in // Sized_target). virtual void - do_adjust_elf_header(unsigned char*, int) const = 0; + do_adjust_elf_header(unsigned char*, int) = 0; + + // Return address and size to plug into eh_frame FDEs associated with a PLT. + virtual void + do_plt_fde_location(const Output_data* plt, unsigned char* oview, + uint64_t* address, off_t* len) const; // Virtual function which may be overridden by the child class. virtual bool @@ -532,6 +612,17 @@ class Target do_plt_address_for_local(const Relobj*, unsigned int) const { gold_unreachable(); } + virtual int64_t + do_tls_offset_for_local(const Relobj*, unsigned int, unsigned int) const + { gold_unreachable(); } + + virtual int64_t + do_tls_offset_for_global(Symbol*, unsigned int) const + { gold_unreachable(); } + + virtual void + do_function_location(Symbol_location*) const = 0; + // Virtual function which may be overriden by the child class. virtual bool do_can_check_for_function_pointers() const @@ -655,6 +746,43 @@ class Target do_define_standard_symbols(Symbol_table*, Layout*) { } + // This may be overridden by the child class. + virtual const char* + do_output_section_name(const Relobj*, const char*, size_t*) const + { return NULL; } + + // This may be overridden by the child class. + virtual void + do_gc_mark_symbol(Symbol_table*, Symbol*) const + { } + + // This may be overridden by the child class. + virtual bool + do_has_custom_set_dynsym_indexes() const + { return false; } + + // This may be overridden by the child class. + virtual unsigned int + do_set_dynsym_indexes(std::vector*, unsigned int, + std::vector*, Stringpool*, Versions*, + Symbol_table*) const + { gold_unreachable(); } + + // This may be overridden by the child class. + virtual unsigned int + do_dynamic_tag_custom_value(elfcpp::DT) const + { gold_unreachable(); } + + // This may be overridden by the child class. + virtual void + do_adjust_dyn_symbol(const Symbol*, unsigned char*) const + { } + + // This may be overridden by the child class. + virtual bool + do_should_include_section(elfcpp::Elf_Word) const + { return true; } + private: // The implementations of the four do_make_elf_object virtual functions are // almost identical except for their sizes and endianness. We use a template. @@ -787,23 +915,23 @@ class Sized_target : public Target const unsigned char* plocal_symbols, Relocatable_relocs*) = 0; - // Relocate a section during a relocatable link. The parameters are - // like relocate_section, with additional parameters for the view of - // the output reloc section. + // Emit relocations for a section during a relocatable link, and for + // --emit-relocs. The parameters are like relocate_section, with + // additional parameters for the view of the output reloc section. virtual void - relocate_for_relocatable(const Relocate_info*, - unsigned int sh_type, - const unsigned char* prelocs, - size_t reloc_count, - Output_section* output_section, - off_t offset_in_output_section, - const Relocatable_relocs*, - unsigned char* view, - typename elfcpp::Elf_types::Elf_Addr - view_address, - section_size_type view_size, - unsigned char* reloc_view, - section_size_type reloc_view_size) = 0; + relocate_relocs(const Relocate_info*, + unsigned int sh_type, + const unsigned char* prelocs, + size_t reloc_count, + Output_section* output_section, + typename elfcpp::Elf_types::Elf_Off + offset_in_output_section, + const Relocatable_relocs*, + unsigned char* view, + typename elfcpp::Elf_types::Elf_Addr view_address, + section_size_type view_size, + unsigned char* reloc_view, + section_size_type reloc_view_size) = 0; // Perform target-specific processing in a relocatable link. This is // only used if we use the relocation strategy RELOC_SPECIAL. @@ -827,7 +955,8 @@ class Sized_target : public Target const unsigned char* /* preloc_in */, size_t /* relnum */, Output_section* /* output_section */, - off_t /* offset_in_output_section */, + typename elfcpp::Elf_types::Elf_Off + /* offset_in_output_section */, unsigned char* /* view */, typename elfcpp::Elf_types::Elf_Addr /* view_address */, @@ -922,6 +1051,21 @@ class Sized_target : public Target section_size_type /* view_size */) { gold_unreachable(); } + // Handle target specific gc actions when adding a gc reference from + // SRC_OBJ, SRC_SHNDX to a location specified by DST_OBJ, DST_SHNDX + // and DST_OFF. + void + gc_add_reference(Symbol_table* symtab, + Object* src_obj, + unsigned int src_shndx, + Object* dst_obj, + unsigned int dst_shndx, + typename elfcpp::Elf_types::Elf_Addr dst_off) const + { + this->do_gc_add_reference(symtab, src_obj, src_shndx, + dst_obj, dst_shndx, dst_off); + } + protected: Sized_target(const Target::Target_info* pti) : Target(pti) @@ -932,7 +1076,18 @@ class Sized_target : public Target // Set the EI_OSABI field if requested. virtual void - do_adjust_elf_header(unsigned char*, int) const; + do_adjust_elf_header(unsigned char*, int); + + // Handle target specific gc actions when adding a gc reference. + virtual void + do_gc_add_reference(Symbol_table*, Object*, unsigned int, + Object*, unsigned int, + typename elfcpp::Elf_types::Elf_Addr) const + { } + + virtual void + do_function_location(Symbol_location*) const + { } }; } // End namespace gold.