diff options
Diffstat (limited to 'gold/i386.cc')
| -rw-r--r-- | gold/i386.cc | 70 |
1 files changed, 55 insertions, 15 deletions
diff --git a/gold/i386.cc b/gold/i386.cc index e1b32e7..2eab3f8 100644 --- a/gold/i386.cc +++ b/gold/i386.cc @@ -368,7 +368,7 @@ class Target_i386 : public Target_freebsd<32, false> Sized_relobj<32, false>* object); // Get the PLT section. - const Output_data_plt_i386* + Output_data_plt_i386* plt_section() const { gold_assert(this->plt_ != NULL); @@ -379,6 +379,10 @@ class Target_i386 : public Target_freebsd<32, false> Reloc_section* rel_dyn_section(Layout*); + // Get the section to use for TLS_DESC relocations. + Reloc_section* + rel_tls_desc_section(Layout*) const; + // Add a potential copy relocation. void copy_reloc(Symbol_table* symtab, Layout* layout, @@ -527,6 +531,10 @@ class Output_data_plt_i386 : public Output_section_data rel_plt() const { return this->rel_; } + // Return where the TLS_DESC relocations should go. + Reloc_section* + rel_tls_desc(Layout*); + protected: void do_adjust_output_section(Output_section* os); @@ -563,6 +571,9 @@ class Output_data_plt_i386 : public Output_section_data // The reloc section. Reloc_section* rel_; + // The TLS_DESC relocations, if necessary. These must follow the + // regular PLT relocs. + Reloc_section* tls_desc_rel_; // The .got.plt section. Output_data_space* got_plt_; // The number of PLT entries. @@ -575,7 +586,7 @@ class Output_data_plt_i386 : public Output_section_data Output_data_plt_i386::Output_data_plt_i386(Layout* layout, Output_data_space* got_plt) - : Output_section_data(4), got_plt_(got_plt), count_(0) + : Output_section_data(4), tls_desc_rel_(NULL), got_plt_(got_plt), count_(0) { this->rel_ = new Reloc_section(false); layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, @@ -621,6 +632,24 @@ Output_data_plt_i386::add_entry(Symbol* gsym) // appear in the relocations. } +// Return where the TLS_DESC relocations should go, creating it if +// necessary. These follow the JUMP_SLOT relocations. + +Output_data_plt_i386::Reloc_section* +Output_data_plt_i386::rel_tls_desc(Layout* layout) +{ + if (this->tls_desc_rel_ == NULL) + { + this->tls_desc_rel_ = new Reloc_section(false); + layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, + elfcpp::SHF_ALLOC, this->tls_desc_rel_, + true, false, false, false); + gold_assert(this->tls_desc_rel_->output_section() == + this->rel_->output_section()); + } + return this->tls_desc_rel_; +} + // The first entry in the PLT for an executable. unsigned char Output_data_plt_i386::exec_first_plt_entry[plt_entry_size] = @@ -771,6 +800,14 @@ Target_i386::make_plt_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym) this->plt_->add_entry(gsym); } +// Get the section to use for TLS_DESC relocations. + +Target_i386::Reloc_section* +Target_i386::rel_tls_desc_section(Layout* layout) const +{ + return this->plt_section()->rel_tls_desc(layout); +} + // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. void @@ -1055,17 +1092,20 @@ Target_i386::Scan::local(Symbol_table* symtab, Output_data_got<32, false>* got = target->got_section(symtab, layout); unsigned int r_sym = elfcpp::elf_r_sym<32>(reloc.get_r_info()); - unsigned int shndx = lsym.get_st_shndx(); - bool is_ordinary; - shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); - if (!is_ordinary) - object->error(_("local symbol %u has bad shndx %u"), - r_sym, shndx); - else - got->add_local_pair_with_rel(object, r_sym, shndx, - GOT_TYPE_TLS_DESC, - target->rel_dyn_section(layout), - elfcpp::R_386_TLS_DESC, 0); + if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC)) + { + unsigned int got_offset = got->add_constant(0); + // The local symbol value is stored in the second + // GOT entry. + got->add_local(object, r_sym, GOT_TYPE_TLS_DESC); + // That set the GOT offset of the local symbol to + // point to the second entry, but we want it to + // point to the first. + object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC, + got_offset); + Reloc_section* rt = target->rel_tls_desc_section(layout); + rt->add_absolute(elfcpp::R_386_TLS_DESC, got, got_offset); + } } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_local(object, r_type); @@ -1386,8 +1426,8 @@ Target_i386::Scan::global(Symbol_table* symtab, // Create a double GOT entry with an R_386_TLS_DESC reloc. Output_data_got<32, false>* got = target->got_section(symtab, layout); - got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, - target->rel_dyn_section(layout), + Reloc_section* rt = target->rel_tls_desc_section(layout); + got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt, elfcpp::R_386_TLS_DESC, 0); } else if (optimized_type == tls::TLSOPT_TO_IE) |