From e785ec03fb73baeb3699bb46901b2c04a415fd58 Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Wed, 30 Dec 2009 07:22:06 +0000 Subject: [PATCH] PR 10450 * i386.cc (class Target_i386): Initialize global_offset_table_ in constructor. Add global_offset_table_ field. (Target_i386::got_section): Set global_offset_table_. (Target_i386::do_finalize_sections): Set global_offset_table_ size. * x86_64.cc (class Target_x86_64): Initialize global_offset_table_ in constructor. Add global_offset_table_ field. (Target_x86_64::got_section): Set global_offset_table_. (Target_x86_64::do_finalize_sections): Set global_offset_table_ size. --- gold/ChangeLog | 12 ++++++++++++ gold/i386.cc | 32 ++++++++++++++++++++++---------- gold/x86_64.cc | 32 ++++++++++++++++++++++---------- 3 files changed, 56 insertions(+), 20 deletions(-) diff --git a/gold/ChangeLog b/gold/ChangeLog index d1f1043c6dd..a8cd1cbf11b 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,5 +1,17 @@ 2009-12-29 Ian Lance Taylor + PR 10450 + * i386.cc (class Target_i386): Initialize global_offset_table_ in + constructor. Add global_offset_table_ field. + (Target_i386::got_section): Set global_offset_table_. + (Target_i386::do_finalize_sections): Set global_offset_table_ + size. + * x86_64.cc (class Target_x86_64): Initialize global_offset_table_ + in constructor. Add global_offset_table_ field. + (Target_x86_64::got_section): Set global_offset_table_. + (Target_x86_64::do_finalize_sections): Set global_offset_table_ + size. + * layout.cc (Layout::Layout): Initialize increase_relro_. (Layout::get_output_section): Add is_relro, is_last_relro, and is_first_non_relro parameters. Change all callers. diff --git a/gold/i386.cc b/gold/i386.cc index 29268c958ff..1044ad84817 100644 --- a/gold/i386.cc +++ b/gold/i386.cc @@ -59,8 +59,8 @@ class Target_i386 : public Target_freebsd<32, false> Target_i386() : Target_freebsd<32, false>(&i386_info), - got_(NULL), plt_(NULL), got_plt_(NULL), rel_dyn_(NULL), - copy_relocs_(elfcpp::R_386_COPY), dynbss_(NULL), + got_(NULL), plt_(NULL), got_plt_(NULL), global_offset_table_(NULL), + rel_dyn_(NULL), copy_relocs_(elfcpp::R_386_COPY), dynbss_(NULL), got_mod_index_offset_(-1U), tls_base_symbol_defined_(false) { } @@ -412,6 +412,8 @@ class Target_i386 : public Target_freebsd<32, false> Output_data_plt_i386* plt_; // The GOT PLT section. Output_data_space* got_plt_; + // The _GLOBAL_OFFSET_TABLE_ symbol. + Symbol* global_offset_table_; // The dynamic reloc section. Reloc_section* rel_dyn_; // Relocs saved to avoid a COPY reloc. @@ -478,13 +480,14 @@ Target_i386::got_section(Symbol_table* symtab, Layout* layout) layout->increase_relro(3 * 4); // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT. - symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, - Symbol_table::PREDEFINED, - this->got_plt_, - 0, 0, elfcpp::STT_OBJECT, - elfcpp::STB_LOCAL, - elfcpp::STV_HIDDEN, 0, - false, false); + this->global_offset_table_ = + symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, + Symbol_table::PREDEFINED, + this->got_plt_, + 0, 0, elfcpp::STT_OBJECT, + elfcpp::STB_LOCAL, + elfcpp::STV_HIDDEN, 0, + false, false); } return this->got_; @@ -1560,7 +1563,7 @@ void Target_i386::do_finalize_sections( Layout* layout, const Input_objects*, - Symbol_table*) + Symbol_table* symtab) { // Fill in some more dynamic tags. Output_data_dynamic* const odyn = layout->dynamic_data(); @@ -1601,6 +1604,15 @@ Target_i386::do_finalize_sections( // relocs. if (this->copy_relocs_.any_saved_relocs()) this->copy_relocs_.emit(this->rel_dyn_section(layout)); + + // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of + // the .got.plt section. + Symbol* sym = this->global_offset_table_; + if (sym != NULL) + { + uint32_t data_size = this->got_plt_->current_data_size(); + symtab->get_sized_symbol<32>(sym)->set_symsize(data_size); + } } // Return whether a direct absolute static relocation needs to be applied. diff --git a/gold/x86_64.cc b/gold/x86_64.cc index 4635799908a..a7e7a39224d 100644 --- a/gold/x86_64.cc +++ b/gold/x86_64.cc @@ -63,8 +63,8 @@ class Target_x86_64 : public Target_freebsd<64, false> Target_x86_64() : Target_freebsd<64, false>(&x86_64_info), - got_(NULL), plt_(NULL), got_plt_(NULL), rela_dyn_(NULL), - copy_relocs_(elfcpp::R_X86_64_COPY), dynbss_(NULL), + got_(NULL), plt_(NULL), got_plt_(NULL), global_offset_table_(NULL), + rela_dyn_(NULL), copy_relocs_(elfcpp::R_X86_64_COPY), dynbss_(NULL), got_mod_index_offset_(-1U), tls_base_symbol_defined_(false) { } @@ -410,6 +410,8 @@ class Target_x86_64 : public Target_freebsd<64, false> Output_data_plt_x86_64* plt_; // The GOT PLT section. Output_data_space* got_plt_; + // The _GLOBAL_OFFSET_TABLE_ symbol. + Symbol* global_offset_table_; // The dynamic reloc section. Reloc_section* rela_dyn_; // Relocs saved to avoid a COPY reloc. @@ -486,13 +488,14 @@ Target_x86_64::got_section(Symbol_table* symtab, Layout* layout) layout->increase_relro(3 * 8); // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT. - symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, - Symbol_table::PREDEFINED, - this->got_plt_, - 0, 0, elfcpp::STT_OBJECT, - elfcpp::STB_LOCAL, - elfcpp::STV_HIDDEN, 0, - false, false); + this->global_offset_table_ = + symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, + Symbol_table::PREDEFINED, + this->got_plt_, + 0, 0, elfcpp::STT_OBJECT, + elfcpp::STB_LOCAL, + elfcpp::STV_HIDDEN, 0, + false, false); } return this->got_; @@ -1650,7 +1653,7 @@ void Target_x86_64::do_finalize_sections( Layout* layout, const Input_objects*, - Symbol_table*) + Symbol_table* symtab) { // Fill in some more dynamic tags. Output_data_dynamic* const odyn = layout->dynamic_data(); @@ -1701,6 +1704,15 @@ Target_x86_64::do_finalize_sections( // relocs. if (this->copy_relocs_.any_saved_relocs()) this->copy_relocs_.emit(this->rela_dyn_section(layout)); + + // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of + // the .got.plt section. + Symbol* sym = this->global_offset_table_; + if (sym != NULL) + { + uint64_t data_size = this->got_plt_->current_data_size(); + symtab->get_sized_symbol<64>(sym)->set_symsize(data_size); + } } // Perform a relocation. -- 2.30.2