// 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 <iant@google.com>.
// This file is part of gold.
#include "elfcpp.h"
#include "options.h"
#include "parameters.h"
+#include "stringpool.h"
#include "debug.h"
namespace gold
class Output_section;
class Input_objects;
class Task;
+struct Symbol_location;
+class Versions;
// The abstract class for target specific handling.
// 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
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
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<Symbol*>* dyn_symbols, unsigned int index,
+ std::vector<Symbol*>* 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
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)
// 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
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
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<Symbol*>*, unsigned int,
+ std::vector<Symbol*>*, 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.
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<size, big_endian>*,
- 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<size>::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<size, big_endian>*,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ offset_in_output_section,
+ const Relocatable_relocs*,
+ unsigned char* view,
+ typename elfcpp::Elf_types<size>::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.
const unsigned char* /* preloc_in */,
size_t /* relnum */,
Output_section* /* output_section */,
- off_t /* offset_in_output_section */,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ /* offset_in_output_section */,
unsigned char* /* view */,
typename elfcpp::Elf_types<size>::Elf_Addr
/* view_address */,
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<size>::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)
// 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<size>::Elf_Addr) const
+ { }
+
+ virtual void
+ do_function_location(Symbol_location*) const
+ { }
};
} // End namespace gold.
projects / platform / upstream / binutils.git / blobdiff