template<bool big_endian>
class Arm_output_section;
+class Arm_exidx_input_section;
+
template<bool big_endian>
class Arm_relobj;
std::vector<Output_relaxed_input_section*>*);
};
+// Arm_exidx_input_section class. This represents an EXIDX input section.
+
+class Arm_exidx_input_section
+{
+ public:
+ static const section_offset_type invalid_offset =
+ static_cast<section_offset_type>(-1);
+
+ Arm_exidx_input_section(Relobj* relobj, unsigned int shndx,
+ unsigned int link, uint32_t size, uint32_t addralign)
+ : relobj_(relobj), shndx_(shndx), link_(link), size_(size),
+ addralign_(addralign)
+ { }
+
+ ~Arm_exidx_input_section()
+ { }
+
+ // Accessors: This is a read-only class.
+
+ // Return the object containing this EXIDX input section.
+ Relobj*
+ relobj() const
+ { return this->relobj_; }
+
+ // Return the section index of this EXIDX input section.
+ unsigned int
+ shndx() const
+ { return this->shndx_; }
+
+ // Return the section index of linked text section in the same object.
+ unsigned int
+ link() const
+ { return this->link_; }
+
+ // Return size of the EXIDX input section.
+ uint32_t
+ size() const
+ { return this->size_; }
+
+ // Reutnr address alignment of EXIDX input section.
+ uint32_t
+ addralign() const
+ { return this->addralign_; }
+
+ private:
+ // Object containing this.
+ Relobj* relobj_;
+ // Section index of this.
+ unsigned int shndx_;
+ // text section linked to this in the same object.
+ unsigned int link_;
+ // Size of this. For ARM 32-bit is sufficient.
+ uint32_t size_;
+ // Address alignment of this. For ARM 32-bit is sufficient.
+ uint32_t addralign_;
+};
+
// Arm_relobj class.
template<bool big_endian>
(*this->section_has_cortex_a8_workaround_)[shndx] = true;
}
+ // Return the EXIDX section of an text section with index SHNDX or NULL
+ // if the text section has no associated EXIDX section.
+ const Arm_exidx_input_section*
+ exidx_input_section_by_link(unsigned int shndx) const
+ {
+ Exidx_section_map::const_iterator p = this->exidx_section_map_.find(shndx);
+ return ((p != this->exidx_section_map_.end()
+ && p->second->link() == shndx)
+ ? p->second
+ : NULL);
+ }
+
+ // Return the EXIDX section with index SHNDX or NULL if there is none.
+ const Arm_exidx_input_section*
+ exidx_input_section_by_shndx(unsigned shndx) const
+ {
+ Exidx_section_map::const_iterator p = this->exidx_section_map_.find(shndx);
+ return ((p != this->exidx_section_map_.end()
+ && p->second->shndx() == shndx)
+ ? p->second
+ : NULL);
+ }
+
protected:
// Post constructor setup.
void
unsigned int, Output_section*,
Target_arm<big_endian>*);
- // List of stub tables.
+ // Make a new Arm_exidx_input_section object for EXIDX section with
+ // index SHNDX and section header SHDR.
+ void
+ make_exidx_input_section(unsigned int shndx,
+ const elfcpp::Shdr<32, big_endian>& shdr);
+
typedef std::vector<Stub_table<big_endian>*> Stub_table_list;
+ typedef Unordered_map<unsigned int, const Arm_exidx_input_section*>
+ Exidx_section_map;
+
+ // List of stub tables.
Stub_table_list stub_tables_;
// Bit vector to tell if a local symbol is a thumb function or not.
// This is only valid after do_count_local_symbol is called.
Mapping_symbols_info mapping_symbols_info_;
// Bitmap to indicate sections with Cortex-A8 workaround or NULL.
std::vector<bool>* section_has_cortex_a8_workaround_;
+ // Map a text section to its associated .ARM.exidx section, if there is one.
+ Exidx_section_map exidx_section_map_;
};
// Arm_dynobj class.
}
}
-// Helper functions for both Arm_relobj and Arm_dynobj to read ARM
-// ABI information.
+// Create a new EXIDX input section object for EXIDX section SHNDX with
+// header SHDR.
template<bool big_endian>
-Attributes_section_data*
-read_arm_attributes_section(
- Object* object,
- Read_symbols_data *sd)
+void
+Arm_relobj<big_endian>::make_exidx_input_section(
+ unsigned int shndx,
+ const elfcpp::Shdr<32, big_endian>& shdr)
{
- // Read the attributes section if there is one.
- // We read from the end because gas seems to put it near the end of
- // the section headers.
- const size_t shdr_size = elfcpp::Elf_sizes<32>::shdr_size;
- const unsigned char *ps =
- sd->section_headers->data() + shdr_size * (object->shnum() - 1);
- for (unsigned int i = object->shnum(); i > 0; --i, ps -= shdr_size)
+ // Link .text section to its .ARM.exidx section in the same object.
+ unsigned int text_shndx = this->adjust_shndx(shdr.get_sh_link());
+
+ // Issue an error and ignore this EXIDX section if it does not point
+ // to any text section.
+ if (text_shndx == elfcpp::SHN_UNDEF)
{
- elfcpp::Shdr<32, big_endian> shdr(ps);
- if (shdr.get_sh_type() == elfcpp::SHT_ARM_ATTRIBUTES)
- {
- section_offset_type section_offset = shdr.get_sh_offset();
- section_size_type section_size =
- convert_to_section_size_type(shdr.get_sh_size());
- File_view* view = object->get_lasting_view(section_offset,
- section_size, true, false);
- return new Attributes_section_data(view->data(), section_size);
- }
+ gold_error(_("EXIDX section %u in %s has no linked text section"),
+ shndx, this->name().c_str());
+ return;
+ }
+
+ // Issue an error and ignore this EXIDX section if it points to a text
+ // section already has an EXIDX section.
+ if (this->exidx_section_map_[text_shndx] != NULL)
+ {
+ gold_error(_("EXIDX sections %u and %u both link to text section %u "
+ "in %s"),
+ shndx, this->exidx_section_map_[text_shndx]->shndx(),
+ text_shndx, this->name().c_str());
+ return;
}
- return NULL;
+
+ // Create an Arm_exidx_input_section object for this EXIDX section.
+ Arm_exidx_input_section* exidx_input_section =
+ new Arm_exidx_input_section(this, shndx, text_shndx, shdr.get_sh_size(),
+ shdr.get_sh_addralign());
+ this->exidx_section_map_[text_shndx] = exidx_input_section;
+
+ // Also map the EXIDX section index to this.
+ gold_assert(this->exidx_section_map_[shndx] == NULL);
+ this->exidx_section_map_[shndx] = exidx_input_section;
}
// Read the symbol information.
true, false);
elfcpp::Ehdr<32, big_endian> ehdr(pehdr);
this->processor_specific_flags_ = ehdr.get_e_flags();
- this->attributes_section_data_ =
- read_arm_attributes_section<big_endian>(this, sd);
+
+ // Go over the section headers and look for .ARM.attributes and .ARM.exidx
+ // sections.
+ const size_t shdr_size = elfcpp::Elf_sizes<32>::shdr_size;
+ const unsigned char *ps =
+ sd->section_headers->data() + shdr_size;
+ for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size)
+ {
+ elfcpp::Shdr<32, big_endian> shdr(ps);
+ if (shdr.get_sh_type() == elfcpp::SHT_ARM_ATTRIBUTES)
+ {
+ gold_assert(this->attributes_section_data_ == NULL);
+ section_offset_type section_offset = shdr.get_sh_offset();
+ section_size_type section_size =
+ convert_to_section_size_type(shdr.get_sh_size());
+ File_view* view = this->get_lasting_view(section_offset,
+ section_size, true, false);
+ this->attributes_section_data_ =
+ new Attributes_section_data(view->data(), section_size);
+ }
+ else if (shdr.get_sh_type() == elfcpp::SHT_ARM_EXIDX)
+ this->make_exidx_input_section(i, shdr);
+ }
}
// Process relocations for garbage collection. The ARM target uses .ARM.exidx
true, false);
elfcpp::Ehdr<32, big_endian> ehdr(pehdr);
this->processor_specific_flags_ = ehdr.get_e_flags();
- this->attributes_section_data_ =
- read_arm_attributes_section<big_endian>(this, sd);
+
+ // Read the attributes section if there is one.
+ // We read from the end because gas seems to put it near the end of
+ // the section headers.
+ const size_t shdr_size = elfcpp::Elf_sizes<32>::shdr_size;
+ const unsigned char *ps =
+ sd->section_headers->data() + shdr_size * (this->shnum() - 1);
+ for (unsigned int i = this->shnum(); i > 0; --i, ps -= shdr_size)
+ {
+ elfcpp::Shdr<32, big_endian> shdr(ps);
+ if (shdr.get_sh_type() == elfcpp::SHT_ARM_ATTRIBUTES)
+ {
+ section_offset_type section_offset = shdr.get_sh_offset();
+ section_size_type section_size =
+ convert_to_section_size_type(shdr.get_sh_size());
+ File_view* view = this->get_lasting_view(section_offset,
+ section_size, true, false);
+ this->attributes_section_data_ =
+ new Attributes_section_data(view->data(), section_size);
+ break;
+ }
+ }
}
// Stub_addend_reader methods.
projects / deliverable / binutils-gdb.git / commitdiff
