// gc.h -- garbage collection of unused sections
-// Copyright 2009, 2010 Free Software Foundation, Inc.
+// Copyright 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
// Written by Sriraman Tallam <tmsriram@google.com>.
// This file is part of gold.
class Object;
template<int size, bool big_endian>
-class Sized_relobj;
+class Sized_relobj_file;
template<int sh_type, int size, bool big_endian>
-class Reloc_types;
+struct Reloc_types;
class Output_section;
class General_options;
section_size_type symbol_names_size;
};
+// Relocations of type SHT_REL store the addend value in their bytes.
+// This function returns the size of the embedded addend which is
+// nothing but the size of the relocation.
+
+template<typename Classify_reloc>
+inline unsigned int
+get_embedded_addend_size(int sh_type, int r_type, Relobj* obj)
+{
+ if (sh_type != elfcpp::SHT_REL)
+ return 0;
+ Classify_reloc classify_reloc;
+ return classify_reloc.get_size_for_reloc(r_type, obj);
+}
+
// This function implements the generic part of reloc
// processing to map a section to all the sections it
// references through relocs. It is called only during
// folding (--icf).
template<int size, bool big_endian, typename Target_type, int sh_type,
- typename Scan>
+ typename Scan, typename Classify_reloc>
inline void
gc_process_relocs(
Symbol_table* symtab,
Layout*,
Target_type* target,
- Sized_relobj<size, big_endian>* src_obj,
+ Sized_relobj_file<size, big_endian>* src_obj,
unsigned int src_indx,
const unsigned char* prelocs,
size_t reloc_count,
size_t local_count,
const unsigned char* plocal_syms)
{
- Object *dst_obj;
- unsigned int dst_indx;
Scan scan;
typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype;
Icf::Symbol_info* symvec = NULL;
Icf::Addend_info* addendvec = NULL;
Icf::Offset_info* offsetvec = NULL;
+ Icf::Reloc_addend_size_info* reloc_addend_size_vec = NULL;
bool is_icf_tracked = false;
const char* cident_section_name = NULL;
symvec = &reloc_info->symbol_info;
addendvec = &reloc_info->addend_info;
offsetvec = &reloc_info->offset_info;
+ reloc_addend_size_vec = &reloc_info->reloc_addend_size_info;
}
check_section_for_function_pointers =
unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
typename elfcpp::Elf_types<size>::Elf_Swxword addend =
Reloc_types<sh_type, size, big_endian>::get_reloc_addend_noerror(&reloc);
+ Object* dst_obj;
+ unsigned int dst_indx;
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+ Address dst_off;
if (r_sym < local_count)
{
gold_assert(plocal_syms != NULL);
typename elfcpp::Sym<size, big_endian> lsym(plocal_syms
+ r_sym * sym_size);
- unsigned int shndx = lsym.get_st_shndx();
+ dst_indx = lsym.get_st_shndx();
bool is_ordinary;
- shndx = src_obj->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
+ dst_indx = src_obj->adjust_sym_shndx(r_sym, dst_indx, &is_ordinary);
dst_obj = src_obj;
- dst_indx = shndx;
+ dst_off = lsym.get_st_value() + addend;
+
if (is_icf_tracked)
{
+ Address symvalue = dst_off - addend;
if (is_ordinary)
- (*secvec).push_back(Section_id(dst_obj, dst_indx));
+ (*secvec).push_back(Section_id(dst_obj, dst_indx));
else
(*secvec).push_back(Section_id(NULL, 0));
(*symvec).push_back(NULL);
- long long symvalue = static_cast<long long>(lsym.get_st_value());
- (*addendvec).push_back(std::make_pair(symvalue,
- static_cast<long long>(addend)));
+ (*addendvec).push_back(std::make_pair(
+ static_cast<long long>(symvalue),
+ static_cast<long long>(addend)));
uint64_t reloc_offset =
convert_to_section_size_type(reloc.get_r_offset());
(*offsetvec).push_back(reloc_offset);
+ (*reloc_addend_size_vec).push_back(
+ get_embedded_addend_size<Classify_reloc>(sh_type, r_type,
+ src_obj));
}
// When doing safe folding, check to see if this relocation is that
symtab->icf()->set_section_has_function_pointers(
src_obj, lsym.get_st_shndx());
- if (!is_ordinary || shndx == src_indx)
+ if (!is_ordinary || dst_indx == src_indx)
continue;
}
else
dst_obj = gsym->object();
dst_indx = gsym->shndx(&is_ordinary);
}
+ dst_off = static_cast<const Sized_symbol<size>*>(gsym)->value();
+ dst_off += addend;
// When doing safe folding, check to see if this relocation is that
// of a function pointer being taken.
}
if (is_icf_tracked)
{
+ Address symvalue = dst_off - addend;
if (is_ordinary && gsym->source() == Symbol::FROM_OBJECT)
- (*secvec).push_back(Section_id(dst_obj, dst_indx));
+ (*secvec).push_back(Section_id(dst_obj, dst_indx));
else
(*secvec).push_back(Section_id(NULL, 0));
(*symvec).push_back(gsym);
- Sized_symbol<size>* sized_gsym =
- static_cast<Sized_symbol<size>* >(gsym);
- long long symvalue =
- static_cast<long long>(sized_gsym->value());
- (*addendvec).push_back(std::make_pair(symvalue,
- static_cast<long long>(addend)));
+ (*addendvec).push_back(std::make_pair(
+ static_cast<long long>(symvalue),
+ static_cast<long long>(addend)));
uint64_t reloc_offset =
convert_to_section_size_type(reloc.get_r_offset());
(*offsetvec).push_back(reloc_offset);
+ (*reloc_addend_size_vec).push_back(
+ get_embedded_addend_size<Classify_reloc>(sh_type, r_type,
+ src_obj));
}
if (gsym->source() != Symbol::FROM_OBJECT)
if (parameters->options().gc_sections())
{
symtab->gc()->add_reference(src_obj, src_indx, dst_obj, dst_indx);
+ parameters->sized_target<size, big_endian>()
+ ->gc_add_reference(symtab, src_obj, src_indx,
+ dst_obj, dst_indx, dst_off);
if (cident_section_name != NULL)
{
Garbage_collection::Cident_section_map::iterator ele =