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This patch adds support for TLS descriptors (-mtls-dialect=gnu2) for i386 and x86_64. It also fixes a couple of issues with relaxation from global-dynamic to initial-exec. I've added test cases for GD-to-IE relaxation and for TLS descriptors. The TLS descriptor test cases are conditioned on support for the -mtls-dialect=gnu2 option in gcc and on support in the dynamic loader, which as best I can determined appeared in glibc version 2.5. The dynamic loader support isn't needed for tests involving relaxation to IE or LE models. -cary 2008-04-11 Cary Coutant <ccoutant@google.com> Add support for TLS descriptors for i386 and x86_64. * i386.cc (Target_i386::Relocate::tls_desc_gd_to_ie): New function. (Target_i386::Relocate::tls_desc_gd_to_le): New function. (Target_i386::Got_type): Add GOT_TYPE_TLS_NOFFSET and GOT_TYPE_TLS_DESC. (Target_i386::got_mod_index_entry): Remove unnecessary code. (Target_i386::Scan::local): Implement R_386_TLS_GOTDESC and R_386_TLS_DESC_CALL relocations. Fix problem with initial-exec relocations. (Target_i386::Scan::global): Fix problem with GD-to-IE relaxation. Implement R_386_TLS_GOTDESC and R_386_TLS_DESC_CALL relocations; Fix problem with initial-exec relocations. (Target_i386::Relocate::relocate_tls): Likewise. (Target_i386::Relocate::tls_gd_to_ie): Fix problem with GD-to-IE relaxation. * output.cc (Output_data_dynamic::Dynamic_entry::write): Add support for section-plus-offset dynamic table entries. * output.h (Output_data_dynamic::add_section_plus_offset): New function. (Output_data_dynamic::Dynamic_entry): Add support for section-plus-offset dynamic table entries. (Output_data_dynamic::Classification): Likewise. (Output_data_dynamic::classification_): Renamed offset_. * x86_64.cc (Target_x86_64::Relocate::tls_desc_gd_to_ie): New function. (Target_x86_64::Relocate::tls_desc_gd_to_le): New function. (Target_x86_64::make_plt_section): New function. (Target_x86_64::reserve_tlsdesc_entries): New function. (Output_data_plt_x86_64::Output_data_plt_x86_64): Add new parameter. (Output_data_plt_x86_64::reserve_tlsdesc_entry): New function. (Output_data_plt_x86_64::has_tlsdesc_entry): New function. (Output_data_plt_x86_64::get_tlsdesc_got_offset): New function. (Output_data_plt_x86_64::get_tlsdesc_plt_offset): New function. (Output_data_plt_x86_64::tlsdesc_plt_entry): New field. (Output_data_plt_x86_64::set_final_data_size): Move out of line; add extra PLT entry for TLS descriptors. (Output_data_plt_x86_64::got_): New field. (Output_data_plt_x86_64::tlsdesc_got_offset_): New field. (Output_data_plt_x86_64::Output_data_plt_x86_64): Initialize new fields. (Output_data_plt_x86_64::do_write): Write extra PLT entry for TLS descriptors. (Target_x86_64::make_plt_entry): Factor out make_plt_section. (Target_x86_64::got_mod_index_entry): Remove unnecessary code. (Target_x86_64::Scan::local): Implement R_386_TLS_GOTDESC and R_386_TLS_DESC_CALL relocations. (Target_x86_64::Scan::global): Likewise. (Target_x86_64::do_finalize_sections): Add dynamic table entries for TLS descriptors. (Relocate::relocate_tls): Fix problem with GD-to-IE relaxation. Implement R_386_TLS_GOTDESC and R_386_TLS_DESC_CALL relocations. (Target_x86_64::Relocate::tls_gd_to_ie): Fix problem with GD-to-IE relaxation. * configure.ac: Export new conditional variables TLS_GNU2_DIALECT and TLS_DESCRIPTORS. * Makefile.in: Rebuild. * configure: Rebuild. * testsuite/Makefile.am (tls_shared_gd_to_ie_test): New target. (tls_test_shared2.so): New target. (tls_shared_gd_to_ie_test_SOURCES): New variable. (tls_shared_gd_to_ie_test_DEPENDENCIES): New variable. (tls_shared_gd_to_ie_test_LDFLAGS): New variable. (tls_shared_gd_to_ie_test_LDADD): New variable. (tls_shared_gnu2_gd_to_ie_test): New target. (tls_test_gnu2.o, tls_test_file2_gnu2.o, tls_test_gnu2_shared2.so): New targets. (tls_shared_gnu2_gd_to_ie_test_SOURCES): New variable. (ls_shared_gnu2_gd_to_ie_test_DEPENDENCIES): New variable. (tls_shared_gnu2_gd_to_ie_test_LDFLAGS): New variable. (tls_shared_gnu2_gd_to_ie_test_LDADD): New variable. (tls_shared_gnu2_test): New target. (tls_test_gnu2_shared.so): New target. (tls_shared_gnu2_test_SOURCES): New variable. (tls_shared_gnu2_test_DEPENDENCIES): New variable. (tls_shared_gnu2_test_LDFLAGS): New variable. (tls_shared_gnu2_test_LDADD): New variable. * testsuite/Makefile.in: Rebuild. * testsuite/Makefile.
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tlsdesc.patch.txt
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