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authorIan Lance Taylor <ian@airs.com>2008-04-16 22:54:29 +0000
committerIan Lance Taylor <ian@airs.com>2008-04-16 22:54:29 +0000
commit12c0daef5f792cf27f8d0897794bb32729dc370b (patch)
treea282dbfb5ea5b87e31cd1eb4e61bf04584bcd9f7 /gold/reloc.h
parent4f4995b6282c41516d0bd895832ced99d799a744 (diff)
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* copy-relocs.cc: New file.
* copy-relocs.h: New file. * reloc.cc: Remove Copy_relocs code. * reloc.h: Likewise. * reloc-types.h (struct Reloc_types) [both versions]: Add get_reloc_addend_noerror. * output.h (class Output_data_reloc<elfcpp::SHT_REL>): Add variants of add_global which take an addend which must be zero. * i386.cc: Include "copy-relocs.h". (class Target_i386): Change type of copy_relocs_ to variable, update initializer. (Target_i386::copy_reloc): Rewrite to pass to Copy_relocs class. Change all callers. (Target_i386::do_finalize_sections): Change handling of copy_relocs_. * sparc.cc: Include "copy-relocs.h". (class Target_sparc): Change type of copy_relocs_ to variable, update initializer. (Target_sparc::copy_reloc): Rewrite to pass to Copy_relocs class. Change all callers. (Target_sparc::do_finalize_sections): Change handling of copy_relocs_. * x86_64.cc: Include "copy-relocs.h". (class Target_x86_64): Change type of copy_relocs_ to variable, update initializer. (Target_x86_64::copy_reloc): Rewrite to pass to Copy_relocs class. Change all callers. (Target_x86_64::do_finalize_sections): Change handling of copy_relocs_. * Makefile.am (CCFILES): Add copy-relocs.cc. (HFILES): Add copy-relocs.h.
Diffstat (limited to 'gold/reloc.h')
-rw-r--r--gold/reloc.h96
1 files changed, 0 insertions, 96 deletions
diff --git a/gold/reloc.h b/gold/reloc.h
index 537738c..61f05e7 100644
--- a/gold/reloc.h
+++ b/gold/reloc.h
@@ -613,102 +613,6 @@ public:
{ This::template pcrela<64>(view, object, psymval, addend, address); }
};
-// We try to avoid COPY relocations when possible. A COPY relocation
-// may be required when an executable refers to a variable defined in
-// a shared library. COPY relocations are problematic because they
-// tie the executable to the exact size of the variable in the shared
-// library. We can avoid them if all the references to the variable
-// are in a writeable section. In that case we can simply use dynamic
-// relocations. However, when scanning relocs, we don't know when we
-// see the relocation whether we will be forced to use a COPY
-// relocation or not. So we have to save the relocation during the
-// reloc scanning, and then emit it as a dynamic relocation if
-// necessary. This class implements that. It is used by the target
-// specific code.
-
-template<int size, bool big_endian>
-class Copy_relocs
-{
- public:
- Copy_relocs()
- : entries_()
- { }
-
- // Return whether we need a COPY reloc for a reloc against GSYM,
- // which is being applied to section SHNDX in OBJECT.
- static bool
- need_copy_reloc(const General_options*, Relobj* object, unsigned int shndx,
- Sized_symbol<size>* gsym);
-
- // Save a Rel against SYM for possible emission later. SHNDX is the
- // index of the section to which the reloc is being applied.
- void
- save(Symbol* sym, Relobj*, unsigned int shndx,
- Output_section* output_section, const elfcpp::Rel<size, big_endian>&);
-
- // Save a Rela against SYM for possible emission later.
- void
- save(Symbol* sym, Relobj*, unsigned int shndx,
- Output_section* output_section, const elfcpp::Rela<size, big_endian>&);
-
- // Return whether there are any relocs to emit. This also discards
- // entries which need not be emitted.
- bool
- any_to_emit();
-
- // Emit relocs for each symbol which did not get a COPY reloc (i.e.,
- // is still defined in the dynamic object).
- template<int sh_type>
- void
- emit(Output_data_reloc<sh_type, true, size, big_endian>*);
-
- private:
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
- typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend;
-
- // This POD class holds the entries we are saving.
- class Copy_reloc_entry
- {
- public:
- Copy_reloc_entry(Symbol* sym, unsigned int reloc_type,
- Relobj* relobj, unsigned int shndx,
- Output_section* output_section,
- Address address, Addend addend)
- : sym_(sym), reloc_type_(reloc_type), relobj_(relobj),
- shndx_(shndx), output_section_(output_section),
- address_(address), addend_(addend)
- { }
-
- // Return whether we should emit this reloc. If we should not
- // emit, we clear it.
- bool
- should_emit();
-
- // Emit this reloc.
-
- void
- emit(Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>*);
-
- void
- emit(Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>*);
-
- private:
- Symbol* sym_;
- unsigned int reloc_type_;
- Relobj* relobj_;
- unsigned int shndx_;
- Output_section* output_section_;
- Address address_;
- Addend addend_;
- };
-
- // A list of relocs to be saved.
- typedef std::vector<Copy_reloc_entry> Copy_reloc_entries;
-
- // The list of relocs we are saving.
- Copy_reloc_entries entries_;
-};
-
// Track relocations while reading a section. This lets you ask for
// the relocation at a certain offset, and see how relocs occur
// between points of interest.