From 6a74a71947df73c828f073af0dcad0c323dcd8c4 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Wed, 6 Feb 2008 08:13:50 +0000 Subject: Initial -r support. --- gold/i386.cc | 182 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 182 insertions(+) (limited to 'gold/i386.cc') diff --git a/gold/i386.cc b/gold/i386.cc index ca68a3f..3bcfa4c 100644 --- a/gold/i386.cc +++ b/gold/i386.cc @@ -96,6 +96,37 @@ class Target_i386 : public Sized_target<32, false> elfcpp::Elf_types<32>::Elf_Addr view_address, section_size_type view_size); + // Scan the relocs during a relocatable link. + void + scan_relocatable_relocs(const General_options& options, + Symbol_table* symtab, + Layout* layout, + Sized_relobj<32, false>* object, + unsigned int data_shndx, + unsigned int sh_type, + const unsigned char* prelocs, + size_t reloc_count, + Output_section* output_section, + bool needs_special_offset_handling, + size_t local_symbol_count, + const unsigned char* plocal_symbols, + Relocatable_relocs*); + + // Relocate a section during a relocatable link. + void + relocate_for_relocatable(const Relocate_info<32, false>*, + 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, + elfcpp::Elf_types<32>::Elf_Addr view_address, + section_size_type view_size, + unsigned char* reloc_view, + section_size_type reloc_view_size); + // Return a string used to fill a code section with nops. std::string do_code_fill(section_size_type length); @@ -240,6 +271,15 @@ class Target_i386 : public Sized_target<32, false> Local_dynamic_type local_dynamic_type_; }; + // A class which returns the size required for a relocation type, + // used while scanning relocs during a relocatable link. + class Relocatable_size_for_reloc + { + public: + unsigned int + get_size_for_reloc(unsigned int, Relobj*); + }; + // Adjust TLS relocation type based on the options and whether this // is a local symbol. static tls::Tls_optimization @@ -2151,6 +2191,148 @@ Target_i386::relocate_section(const Relocate_info<32, false>* relinfo, view_size); } +// Return the size of a relocation while scanning during a relocatable +// link. + +unsigned int +Target_i386::Relocatable_size_for_reloc::get_size_for_reloc( + unsigned int r_type, + Relobj* object) +{ + switch (r_type) + { + case elfcpp::R_386_NONE: + case elfcpp::R_386_GNU_VTINHERIT: + case elfcpp::R_386_GNU_VTENTRY: + case elfcpp::R_386_TLS_GD: // Global-dynamic + case elfcpp::R_386_TLS_GOTDESC: // Global-dynamic (from ~oliva url) + case elfcpp::R_386_TLS_DESC_CALL: + case elfcpp::R_386_TLS_LDM: // Local-dynamic + case elfcpp::R_386_TLS_LDO_32: // Alternate local-dynamic + case elfcpp::R_386_TLS_IE: // Initial-exec + case elfcpp::R_386_TLS_IE_32: + case elfcpp::R_386_TLS_GOTIE: + case elfcpp::R_386_TLS_LE: // Local-exec + case elfcpp::R_386_TLS_LE_32: + return 0; + + case elfcpp::R_386_32: + case elfcpp::R_386_PC32: + case elfcpp::R_386_GOT32: + case elfcpp::R_386_PLT32: + case elfcpp::R_386_GOTOFF: + case elfcpp::R_386_GOTPC: + return 4; + + case elfcpp::R_386_16: + case elfcpp::R_386_PC16: + return 2; + + case elfcpp::R_386_8: + case elfcpp::R_386_PC8: + return 1; + + // These are relocations which should only be seen by the + // dynamic linker, and should never be seen here. + case elfcpp::R_386_COPY: + case elfcpp::R_386_GLOB_DAT: + case elfcpp::R_386_JUMP_SLOT: + case elfcpp::R_386_RELATIVE: + case elfcpp::R_386_TLS_TPOFF: + case elfcpp::R_386_TLS_DTPMOD32: + case elfcpp::R_386_TLS_DTPOFF32: + case elfcpp::R_386_TLS_TPOFF32: + case elfcpp::R_386_TLS_DESC: + object->error(_("unexpected reloc %u in object file"), r_type); + return 0; + + case elfcpp::R_386_32PLT: + case elfcpp::R_386_TLS_GD_32: + case elfcpp::R_386_TLS_GD_PUSH: + case elfcpp::R_386_TLS_GD_CALL: + case elfcpp::R_386_TLS_GD_POP: + case elfcpp::R_386_TLS_LDM_32: + case elfcpp::R_386_TLS_LDM_PUSH: + case elfcpp::R_386_TLS_LDM_CALL: + case elfcpp::R_386_TLS_LDM_POP: + case elfcpp::R_386_USED_BY_INTEL_200: + default: + object->error(_("unsupported reloc %u in object file"), r_type); + return 0; + } +} + +// Scan the relocs during a relocatable link. + +void +Target_i386::scan_relocatable_relocs(const General_options& options, + Symbol_table* symtab, + Layout* layout, + Sized_relobj<32, false>* object, + unsigned int data_shndx, + unsigned int sh_type, + const unsigned char* prelocs, + size_t reloc_count, + Output_section* output_section, + bool needs_special_offset_handling, + size_t local_symbol_count, + const unsigned char* plocal_symbols, + Relocatable_relocs* rr) +{ + gold_assert(sh_type == elfcpp::SHT_REL); + + typedef gold::Default_scan_relocatable_relocs Scan_relocatable_relocs; + + gold::scan_relocatable_relocs<32, false, Target_i386, elfcpp::SHT_REL, + Scan_relocatable_relocs>( + options, + symtab, + layout, + object, + data_shndx, + prelocs, + reloc_count, + output_section, + needs_special_offset_handling, + local_symbol_count, + plocal_symbols, + rr); +} + +// Relocate a section during a relocatable link. + +void +Target_i386::relocate_for_relocatable( + const Relocate_info<32, false>* relinfo, + 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* rr, + unsigned char* view, + elfcpp::Elf_types<32>::Elf_Addr view_address, + section_size_type view_size, + unsigned char* reloc_view, + section_size_type reloc_view_size) +{ + gold_assert(sh_type == elfcpp::SHT_REL); + + gold::relocate_for_relocatable<32, false, Target_i386, elfcpp::SHT_REL>( + relinfo, + prelocs, + reloc_count, + output_section, + offset_in_output_section, + rr, + view, + view_address, + view_size, + reloc_view, + reloc_view_size); +} + // Return the value to use for a dynamic which requires special // treatment. This is how we support equality comparisons of function // pointers across shared library boundaries, as described in the -- cgit v1.1