// target.h -- target support for gold -*- C++ -*-
-// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012
+// Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
class Sized_relobj_file;
class Relocatable_relocs;
template<int size, bool big_endian>
-class Relocate_info;
+struct Relocate_info;
class Reloc_symbol_changes;
class Symbol;
template<int size>
this->abi_pagesize());
}
+ // Return whether PF_X segments must contain nothing but the contents of
+ // SHF_EXECINSTR sections (no non-executable data, no headers).
+ bool
+ isolate_execinstr() const
+ { return this->pti_->isolate_execinstr; }
+
+ uint64_t
+ rosegment_gap() const
+ { return this->pti_->rosegment_gap; }
+
// If we see some object files with .note.GNU-stack sections, and
// some objects files without them, this returns whether we should
// consider the object files without them to imply that the stack
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); }
+
// Return whether this target can use relocation types to determine
// if a function's address is taken.
bool
return pass < 2;
return this->do_relax(pass, input_objects, symtab, layout, task);
- }
+ }
// Return the target-specific name of attributes section. This is
// NULL if a target does not use attributes section or if it uses
{
return ((this->pti_->attributes_section != NULL
&& strcmp(name, this->pti_->attributes_section) == 0)
- || strcmp(name, ".gnu.attributes") == 0);
+ || strcmp(name, ".gnu.attributes") == 0);
}
// Return a bit mask of argument types for attribute with TAG.
// which may be used for expensive, target-specific initialization.
void
select_as_default_target()
- { this->do_select_as_default_target(); }
+ { this->do_select_as_default_target(); }
// Return the value to store in the EI_OSABI field in the ELF
// header.
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); }
+
protected:
// This struct holds the constant information for a child class. We
// use a struct to avoid the overhead of virtual function calls for
uint64_t abi_pagesize;
// The common page size used by actual implementations.
uint64_t common_pagesize;
+ // Whether PF_X segments must contain nothing but the contents of
+ // SHF_EXECINSTR sections (no non-executable data, no headers).
+ bool isolate_execinstr;
+ // If nonzero, distance from the text segment to the read-only segment.
+ uint64_t rosegment_gap;
// The special section index for small common symbols; SHN_UNDEF
// if none.
elfcpp::Elf_Half small_common_shndx;
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 function which may be overriden by the child class.
virtual bool
do_can_check_for_function_pointers() const
this->processor_specific_flags_ = flags;
this->are_processor_specific_flags_set_ = true;
}
-
+
#ifdef HAVE_TARGET_32_LITTLE
// Virtual functions which may be overridden by the child class.
virtual Object*
section_offset_type offset, size_t len) const;
// This must be overridden by the child class if it has target-specific
- // attributes subsection in the attribute section.
+ // attributes subsection in the attribute section.
virtual int
do_attribute_arg_type(int) const
{ gold_unreachable(); }
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
+ { }
+
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,
+ 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;
+
// Perform target-specific processing in a relocatable link. This is
// only used if we use the relocation strategy RELOC_SPECIAL.
// RELINFO points to a Relocation_info structure. SH_TYPE is the relocation
section_size_type /* view_size */,
unsigned char* /* preloc_out*/)
{ gold_unreachable(); }
-
+
// Return the number of entries in the GOT. This is only used for
// laying out the incremental link info sections. A target needs
// to implement this to support incremental linking.
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;
+
+ // 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
+ { }
};
} // End namespace gold.
projects / binutils-gdb.git / blobdiff