X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gold%2Ftarget.h;h=8e801e18278e3f0f9d5321381b8b028fbda06692;hb=945e0f82dad31db89a107b496532886fe215c011;hp=dfbc5eee6a710cb4e05afe5f3bad17d4f8d9d0d3;hpb=efc6fa128f00d61014f56530724767ea048bf594;p=deliverable%2Fbinutils-gdb.git diff --git a/gold/target.h b/gold/target.h index dfbc5eee6a..8e801e1827 100644 --- a/gold/target.h +++ b/gold/target.h @@ -1,6 +1,6 @@ // target.h -- target support for gold -*- C++ -*- -// Copyright (C) 2006-2015 Free Software Foundation, Inc. +// Copyright (C) 2006-2016 Free Software Foundation, Inc. // Written by Ian Lance Taylor . // This file is part of gold. @@ -321,13 +321,15 @@ class Target ehframe_datarel_base() const { return this->do_ehframe_datarel_base(); } - // Return true if a reference to SYM from a reloc of type R_TYPE + // Return true if a reference to SYM from a reloc at *PRELOC // means that the current function may call an object compiled // without -fsplit-stack. SYM is known to be defined in an object // compiled without -fsplit-stack. bool - is_call_to_non_split(const Symbol* sym, unsigned int r_type) const - { return this->do_is_call_to_non_split(sym, r_type); } + is_call_to_non_split(const Symbol* sym, const unsigned char* preloc, + const unsigned char* view, + section_size_type view_size) const + { return this->do_is_call_to_non_split(sym, preloc, view, view_size); } // A function starts at OFFSET in section SHNDX in OBJECT. That // function was compiled with -fsplit-stack, but it refers to a @@ -338,10 +340,12 @@ class Target void calls_non_split(Relobj* object, unsigned int shndx, section_offset_type fnoffset, section_size_type fnsize, + const unsigned char* prelocs, size_t reloc_count, unsigned char* view, section_size_type view_size, std::string* from, std::string* to) const { - this->do_calls_non_split(object, shndx, fnoffset, fnsize, view, view_size, + this->do_calls_non_split(object, shndx, fnoffset, fnsize, + prelocs, reloc_count, view, view_size, from, to); } @@ -455,6 +459,11 @@ class Target entry_symbol_name() const { return this->pti_->entry_symbol_name; } + // Return the size in bits of SHT_HASH entry. + int + hash_entry_size() const + { return this->pti_->hash_entry_size; } + // Whether the target has a custom set_dynsym_indexes method. bool has_custom_set_dynsym_indexes() const @@ -540,6 +549,9 @@ class Target const char* attributes_vendor; // Name of the main entry point to the program. const char* entry_symbol_name; + // Size (in bits) of SHT_HASH entry. Always equal to 32, except for + // 64-bit S/390. + const int hash_entry_size; }; Target(const Target_info* pti) @@ -651,12 +663,14 @@ class Target // default implementation is that any function not defined by the // ABI is a call to a non-split function. virtual bool - do_is_call_to_non_split(const Symbol* sym, unsigned int) const; + do_is_call_to_non_split(const Symbol* sym, const unsigned char*, + const unsigned char*, section_size_type) const; // Virtual function which may be overridden by the child class. virtual void do_calls_non_split(Relobj* object, unsigned int, section_offset_type, - section_size_type, unsigned char*, section_size_type, + section_size_type, const unsigned char*, size_t, + unsigned char*, section_size_type, std::string*, std::string*) const; // make_elf_object hooks. There are four versions of these for @@ -820,7 +834,7 @@ class Sized_target : public Target // symbol table. This will only be called if has_make_symbol() // returns true. virtual Sized_symbol* - make_symbol() const + make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t) { gold_unreachable(); } // Resolve a symbol for the target. This should be overridden by a @@ -915,6 +929,22 @@ class Sized_target : public Target const unsigned char* plocal_symbols, Relocatable_relocs*) = 0; + // Scan the relocs for --emit-relocs. The parameters are + // like scan_relocatable_relocs. + virtual void + emit_relocs_scan(Symbol_table* symtab, + Layout* layout, + Sized_relobj_file* object, + unsigned int data_shndx, + unsigned int sh_type, + const unsigned char* prelocs, + size_t reloc_count, + Output_section* output_section, + bool needs_special_offset_handling, + size_t local_symbol_count, + const unsigned char* plocal_syms, + Relocatable_relocs* rr) = 0; + // 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. @@ -926,7 +956,6 @@ class Sized_target : public Target 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, @@ -996,6 +1025,14 @@ class Sized_target : public Target plt_entry_size() const { gold_unreachable(); } + // Return the size of each GOT entry. This is only used for + // laying out the incremental link info sections. A target needs + // to implement this if its GOT size is different. + + virtual unsigned int + got_entry_size() const + { return size / 8; } + // Create the GOT and PLT sections for an incremental update. // A target needs to implement this to support incremental linking. @@ -1066,6 +1103,19 @@ class Sized_target : public Target dst_obj, dst_shndx, dst_off); } + // Return the r_sym field from a relocation. + // Most targets can use the default version of this routine, + // but some targets have a non-standard r_info field, and will + // need to provide a target-specific version. + virtual unsigned int + get_r_sym(const unsigned char* preloc) const + { + // Since REL and RELA relocs share the same structure through + // the r_info field, we can just use REL here. + elfcpp::Rel rel(preloc); + return elfcpp::elf_r_sym(rel.get_r_info()); + } + protected: Sized_target(const Target::Target_info* pti) : Target(pti)