diff options
Diffstat (limited to 'gold/x86_64.cc')
| -rw-r--r-- | gold/x86_64.cc | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/gold/x86_64.cc b/gold/x86_64.cc index 6fea4e3..247f9d0 100644 --- a/gold/x86_64.cc +++ b/gold/x86_64.cc @@ -63,7 +63,7 @@ class Target_x86_64 : public Sized_target<64, false> : Sized_target<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_mod_index_offset_(-1U) + got_mod_index_offset_(-1U), tls_base_symbol_defined_(false) { } // Scan the relocations to look for symbol adjustments. @@ -324,6 +324,10 @@ class Target_x86_64 : public Sized_target<64, false> void make_plt_entry(Symbol_table*, Layout*, Symbol*); + // Define the _TLS_MODULE_BASE_ symbol at the end of the TLS segment. + void + define_tls_base_symbol(Symbol_table*, Layout*); + // Create the reserved PLT and GOT entries for the TLS descriptor resolver. void reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout); @@ -394,6 +398,8 @@ class Target_x86_64 : public Sized_target<64, false> Output_data_space* dynbss_; // Offset of the GOT entry for the TLS module index. unsigned int got_mod_index_offset_; + // True if the _TLS_MODULE_BASE_ symbol has been defined. + bool tls_base_symbol_defined_; }; const Target::Target_info Target_x86_64::x86_64_info = @@ -771,6 +777,27 @@ Target_x86_64::make_plt_entry(Symbol_table* symtab, Layout* layout, this->plt_->add_entry(gsym); } +// Define the _TLS_MODULE_BASE_ symbol at the end of the TLS segment. + +void +Target_x86_64::define_tls_base_symbol(Symbol_table* symtab, Layout* layout) +{ + if (this->tls_base_symbol_defined_) + return; + + Output_segment* tls_segment = layout->tls_segment(); + if (tls_segment != NULL) + { + symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL, + tls_segment, 0, 0, + elfcpp::STT_TLS, + elfcpp::STB_LOCAL, + elfcpp::STV_HIDDEN, 0, + Symbol::SEGMENT_END, true); + } + this->tls_base_symbol_defined_ = true; +} + // Create the reserved PLT and GOT entries for the TLS descriptor resolver. void @@ -1093,6 +1120,7 @@ Target_x86_64::Scan::local(const General_options&, break; case elfcpp::R_X86_64_GOTPC32_TLSDESC: + target->define_tls_base_symbol(symtab, layout); if (optimized_type == tls::TLSOPT_NONE) { // Create reserved PLT and GOT entries for the resolver. @@ -1393,6 +1421,7 @@ Target_x86_64::Scan::global(const General_options&, break; case elfcpp::R_X86_64_GOTPC32_TLSDESC: + target->define_tls_base_symbol(symtab, layout); if (optimized_type == tls::TLSOPT_NONE) { // Create reserved PLT and GOT entries for the resolver. |