This commit was manufactured by cvs2svn to create branchbinutils-arc-20081103-branchpointarc-20081103-branchpointarc-20081103-branch

'arc-20081103-branch'.

Sprout from binutils-2_19-branch 2008-09-08 08:56:58 UTC nobody 'This commit was manufactured by cvs2svn to create branch 'binutils-'
Cherrypick from binutils-2_19-branch 2009-01-03 17:43:46 UTC nobody 'This commit was manufactured by cvs2svn to create branch 'binutils-':
    gas/testsuite/gas/ppc/common.d
    gas/testsuite/gas/ppc/common.s
    ld/testsuite/ld-powerpc/attr-gnu-12-1.s
    ld/testsuite/ld-powerpc/attr-gnu-12-11.d
    ld/testsuite/ld-powerpc/attr-gnu-12-2.s
    ld/testsuite/ld-powerpc/attr-gnu-12-21.d
Cherrypick from binutils-2_19-branch 2008-09-11 09:06:56 UTC nobody 'This commit was manufactured by cvs2svn to create branch 'binutils-':
    gprof/po/ro.po
Cherrypick from binutils-2_19-branch 2008-09-26 07:02:45 UTC nobody 'This commit was manufactured by cvs2svn to create branch 'binutils-':
    gas/config/te-solaris.h
Cherrypick from master 2008-11-02 23:59:45 UTC Alan Modra <amodra@gmail.com> 'daily update':
    ChangeLog
    Makefile.def
    Makefile.in
    Makefile.tpl
    bfd/ChangeLog
    bfd/Makefile.am
    bfd/Makefile.in
    bfd/aclocal.m4
    bfd/bfd-in2.h
    bfd/cache.c
    bfd/coff64-rs6000.c
    bfd/coffgen.c
    bfd/cofflink.c
    bfd/config.in
    bfd/configure
    bfd/configure.in
    bfd/doc/Makefile.in
    bfd/dwarf2.c
    bfd/elf-bfd.h
    bfd/elf-eh-frame.c
    bfd/elf.c
    bfd/elf32-cris.c
    bfd/elf32-ppc.c
    bfd/elf32-sh-symbian.c
    bfd/elf32-spu.c
    bfd/elf32-xtensa.c
    bfd/elf64-ppc.c
    bfd/elflink.c
    bfd/elfxx-mips.c
    bfd/libbfd.h
    bfd/linker.c
    bfd/po/id.po
    bfd/po/vi.po
    bfd/reloc.c
    bfd/version.h
    binutils/BRANCHES
    binutils/ChangeLog
    binutils/Makefile.in
    binutils/aclocal.m4
    binutils/config.in
    binutils/configure
    binutils/configure.in
    binutils/dlltool.c
    binutils/doc/Makefile.in
    binutils/dwarf.c
    binutils/embedspu.sh
    binutils/objcopy.c
    binutils/po/id.po
    binutils/po/sv.po
    binutils/readelf.c
    binutils/stabs.c
    binutils/testsuite/ChangeLog
    binutils/testsuite/binutils-all/group-2.s
    binutils/testsuite/binutils-all/group-3.s
    binutils/testsuite/binutils-all/group-4.s
    binutils/testsuite/binutils-all/group.s
    binutils/testsuite/binutils-all/objcopy.exp
    binutils/testsuite/binutils-all/objdump.W
    binutils/testsuite/binutils-all/strip-4.d
    binutils/testsuite/binutils-all/strip-5.d
    binutils/testsuite/binutils-all/strip-6.d
    binutils/testsuite/binutils-all/strip-7.d
    binutils/testsuite/binutils-all/strip-8.d
    binutils/testsuite/binutils-all/strip-9.d
    binutils/windmc.c
    binutils/windres.c
    configure
    configure.ac
    gas/ChangeLog
    gas/Makefile.am
    gas/Makefile.in
    gas/NEWS
    gas/aclocal.m4
    gas/app.c
    gas/config.in
    gas/config/bfin-parse.y
    gas/config/tc-bfin.c
    gas/config/tc-cris.c
    gas/config/tc-frv.c
    gas/config/tc-frv.h
    gas/config/tc-hppa.c
    gas/config/tc-hppa.h
    gas/config/tc-i386.c
    gas/config/tc-i386.h
    gas/config/tc-m68k.c
    gas/config/tc-mips.c
    gas/config/tc-mmix.c
    gas/config/tc-mmix.h
    gas/config/tc-mn10300.h
    gas/config/tc-ns32k.c
    gas/config/tc-ppc.c
    gas/config/tc-sh.h
    gas/config/tc-sh64.h
    gas/config/tc-tic4x.c
    gas/config/tc-xtensa.c
    gas/config/tc-xtensa.h
    gas/config/tc-z80.c
    gas/configure
    gas/configure.in
    gas/configure.tgt
    gas/doc/Makefile.in
    gas/doc/as.texinfo
    gas/doc/internals.texi
    gas/dw2gencfi.c
    gas/frags.c
    gas/hash.c
    gas/listing.c
    gas/po/id.po
    gas/read.c
    gas/symbols.c
    gas/testsuite/ChangeLog
    gas/testsuite/gas/all/gas.exp
    gas/testsuite/gas/cfi/cfi-alpha-1.d
    gas/testsuite/gas/cfi/cfi-alpha-3.d
    gas/testsuite/gas/cfi/cfi-arm-1.d
    gas/testsuite/gas/cfi/cfi-common-1.d
    gas/testsuite/gas/cfi/cfi-common-2.d
    gas/testsuite/gas/cfi/cfi-common-3.d
    gas/testsuite/gas/cfi/cfi-common-4.d
    gas/testsuite/gas/cfi/cfi-common-5.d
    gas/testsuite/gas/cfi/cfi-common-6.d
    gas/testsuite/gas/cfi/cfi-hppa-1.d
    gas/testsuite/gas/cfi/cfi-i386-2.d
    gas/testsuite/gas/cfi/cfi-i386.d
    gas/testsuite/gas/cfi/cfi-m68k.d
    gas/testsuite/gas/cfi/cfi-mips-1.d
    gas/testsuite/gas/cfi/cfi-ppc-1.d
    gas/testsuite/gas/cfi/cfi-s390-1.d
    gas/testsuite/gas/cfi/cfi-s390x-1.d
    gas/testsuite/gas/cfi/cfi-sh-1.d
    gas/testsuite/gas/cfi/cfi-sparc-1.d
    gas/testsuite/gas/cfi/cfi-sparc64-1.d
    gas/testsuite/gas/cfi/cfi-x86_64.d
    gas/testsuite/gas/cris/rd-tls-1.d
    gas/testsuite/gas/cris/rd-tls-1.s
    gas/testsuite/gas/cris/rd-tls-2.d
    gas/testsuite/gas/cris/rd-tls-2.s
    gas/testsuite/gas/cris/tls-err-1.s
    gas/testsuite/gas/cris/tls-err-2.s
    gas/testsuite/gas/cris/tls-err-3.s
    gas/testsuite/gas/elf/elf.exp
    gas/testsuite/gas/i386/i386.exp
    gas/testsuite/gas/i386/nops-5-i686.d
    gas/testsuite/gas/i386/nops-5.d
    gas/testsuite/gas/i386/nops-5.s
    gas/testsuite/gas/i386/sse2avx.d
    gas/testsuite/gas/i386/sse2avx.s
    gas/testsuite/gas/i386/x86-64-nops-5-k8.d
    gas/testsuite/gas/i386/x86-64-nops-5.d
    gas/testsuite/gas/i386/x86-64-sse2avx.d
    gas/testsuite/gas/i386/x86-64-sse2avx.s
    gas/testsuite/gas/ppc/power4_32.d
    gas/testsuite/gas/ppc/power4_32.s
    gas/testsuite/gas/ppc/power6.d
    gas/testsuite/gas/ppc/power6.s
    gas/testsuite/gas/ppc/ppc.exp
    gas/testsuite/gas/s390/esa-g5.d
    gas/testsuite/gas/s390/esa-g5.s
    gas/testsuite/gas/s390/esa-z990.d
    gas/testsuite/gas/s390/esa-z990.s
    gas/testsuite/gas/s390/zarch-z900.d
    gas/testsuite/gas/s390/zarch-z900.s
    gas/testsuite/gas/s390/zarch-z990.d
    gas/testsuite/gas/s390/zarch-z990.s
    gas/testsuite/gas/z80/arith.d
    gas/testsuite/gas/z80/arith.s
    gas/testsuite/gas/z80/bit.d
    gas/testsuite/gas/z80/bit.s
    gas/testsuite/gas/z80/block.d
    gas/testsuite/gas/z80/block.s
    gas/testsuite/gas/z80/branch.d
    gas/testsuite/gas/z80/branch.s
    gas/testsuite/gas/z80/inout.d
    gas/testsuite/gas/z80/inout.s
    gas/testsuite/gas/z80/ld-group.d
    gas/testsuite/gas/z80/ld-group.s
    gas/testsuite/gas/z80/misc.d
    gas/testsuite/gas/z80/misc.s
    gas/testsuite/gas/z80/rotate.d
    gas/testsuite/gas/z80/rotate.s
    gas/testsuite/gas/z80/z80.exp
    gas/write.c
    gold/ChangeLog
    gold/Makefile.am
    gold/Makefile.in
    gold/archive.cc
    gold/archive.h
    gold/config.in
    gold/configure
    gold/configure.ac
    gold/descriptors.cc
    gold/descriptors.h
    gold/fileread.cc
    gold/fileread.h
    gold/gold.cc
    gold/i386.cc
    gold/layout.cc
    gold/main.cc
    gold/mapfile.cc
    gold/object.cc
    gold/object.h
    gold/options.cc
    gold/options.h
    gold/output.cc
    gold/output.h
    gold/plugin.cc
    gold/plugin.h
    gold/powerpc.cc
    gold/readsyms.cc
    gold/reloc.cc
    gold/resolve.cc
    gold/sparc.cc
    gold/symtab.cc
    gold/symtab.h
    gold/target-reloc.h
    gold/target.h
    gold/testsuite/Makefile.am
    gold/testsuite/Makefile.in
    gold/testsuite/plugin_test.c
    gold/testsuite/plugin_test_1.sh
    gold/testsuite/plugin_test_2.sh
    gold/testsuite/thin_archive_main.cc
    gold/testsuite/thin_archive_test_1.cc
    gold/testsuite/thin_archive_test_2.cc
    gold/testsuite/thin_archive_test_3.cc
    gold/testsuite/thin_archive_test_4.cc
    gold/x86_64.cc
    gprof/ChangeLog
    gprof/Makefile.in
    gprof/aclocal.m4
    gprof/configure
    gprof/configure.in
    gprof/gconfig.in
    gprof/po/vi.po
    include/ChangeLog
    include/demangle.h
    include/elf/ChangeLog
    include/elf/cris.h
    include/elf/dwarf2.h
    include/elf/ppc.h
    include/obstack.h
    include/plugin-api.h
    ld/ChangeLog
    ld/Makefile.am
    ld/Makefile.in
    ld/aclocal.m4
    ld/config.in
    ld/configure
    ld/configure.in
    ld/emulparams/arcelf.sh
    ld/emulparams/criself.sh
    ld/emulparams/crislinux.sh
    ld/emulparams/elf32_i860.sh
    ld/emulparams/elf32_i960.sh
    ld/emulparams/elf32_sparc.sh
    ld/emulparams/elf32_spu.sh
    ld/emulparams/elf32am33lin.sh
    ld/emulparams/elf32fr30.sh
    ld/emulparams/elf32ip2k.sh
    ld/emulparams/elf32mcore.sh
    ld/emulparams/elf32openrisc.sh
    ld/emulparams/elf32ppccommon.sh
    ld/emulparams/elf32ppcwindiss.sh
    ld/emulparams/elf32vax.sh
    ld/emulparams/elf64_s390.sh
    ld/emulparams/elf64_sparc.sh
    ld/emulparams/elf64alpha.sh
    ld/emulparams/elf64mmix.sh
    ld/emulparams/elf64ppc.sh
    ld/emulparams/elf_i386.sh
    ld/emulparams/elf_i386_be.sh
    ld/emulparams/elf_i386_ldso.sh
    ld/emulparams/elf_i386_vxworks.sh
    ld/emulparams/elf_s390.sh
    ld/emulparams/elf_x86_64.sh
    ld/emulparams/h8300elf.sh
    ld/emulparams/hppa64linux.sh
    ld/emulparams/hppalinux.sh
    ld/emulparams/i386lynx.sh
    ld/emulparams/i386moss.sh
    ld/emulparams/i386nto.sh
    ld/emulparams/m68kelf.sh
    ld/emulparams/mn10200.sh
    ld/emulparams/or32elf.sh
    ld/emulparams/pjelf.sh
    ld/emulparams/ppclynx.sh
    ld/emulparams/scoreelf.sh
    ld/emulparams/shelf.sh
    ld/emulparams/shelf32.sh
    ld/emulparams/shelf_nto.sh
    ld/emulparams/shelf_vxworks.sh
    ld/emulparams/shlelf32_linux.sh
    ld/emulparams/shlelf_linux.sh
    ld/emulparams/shlelf_nto.sh
    ld/emultempl/armelf.em
    ld/emultempl/beos.em
    ld/emultempl/elf32.em
    ld/emultempl/genelf.em
    ld/emultempl/mmo.em
    ld/emultempl/pe.em
    ld/emultempl/pep.em
    ld/emultempl/spuelf.em
    ld/emultempl/sunos.em
    ld/ldemul.c
    ld/ldemul.h
    ld/ldexp.c
    ld/ldlang.c
    ld/ldlang.h
    ld/pe-dll.c
    ld/po/id.po
    ld/po/vi.po
    ld/scripttempl/avr.sc
    ld/scripttempl/elf.sc
    ld/testsuite/ChangeLog
    ld/testsuite/ld-elf/comm1.c
    ld/testsuite/ld-elf/eh-frame-hdr.d
    ld/testsuite/ld-elf/eh-group.exp
    ld/testsuite/ld-elf/eh-group1.s
    ld/testsuite/ld-elf/eh-group2.s
    ld/testsuite/ld-elf/eh1.d
    ld/testsuite/ld-elf/eh2.d
    ld/testsuite/ld-elf/eh3.d
    ld/testsuite/ld-elf/eh4.d
    ld/testsuite/ld-elf/eh5.d
    ld/testsuite/ld-elf/eh5b.s
    ld/testsuite/ld-elf/eh6.d
    ld/testsuite/ld-elf/extract-symbol-1sec.d
    ld/testsuite/ld-elf/func1.c
    ld/testsuite/ld-elf/group4.d
    ld/testsuite/ld-elf/group5.d
    ld/testsuite/ld-elf/group6.d
    ld/testsuite/ld-elf/group7.d
    ld/testsuite/ld-elf/shared.exp
    ld/testsuite/ld-elf/stab.d
    ld/testsuite/ld-elfcomm/common1b.c
    ld/testsuite/ld-gc/gc.c
    ld/testsuite/ld-ia64/tlsbin.rd
    ld/testsuite/ld-ia64/tlspic.rd
    ld/testsuite/ld-mips-elf/eh-frame1-n32.d
    ld/testsuite/ld-mips-elf/eh-frame1-n64.d
    ld/testsuite/ld-mips-elf/eh-frame2-n32.d
    ld/testsuite/ld-mips-elf/eh-frame2-n64.d
    ld/testsuite/ld-mips-elf/eh-frame3.d
    ld/testsuite/ld-mips-elf/eh-frame4.d
    ld/testsuite/ld-mips-elf/reloc-estimate-1.d
    ld/testsuite/ld-powerpc/powerpc.exp
    ld/testsuite/ld-powerpc/vxworks1-lib.rd
    ld/testsuite/ld-shared/main.c
    ld/testsuite/lib/ld-lib.exp
    libiberty/ChangeLog
    libiberty/Makefile.in
    libiberty/config.in
    libiberty/configure
    libiberty/configure.ac
    libiberty/cp-demangle.c
    libiberty/cp-demangle.h
    libiberty/testsuite/demangle-expected
    libiberty/xstrdup.c
    libtool.m4
    ltgcc.m4
    ltmain.sh
    ltoptions.m4
    ltsugar.m4
    ltversion.m4
    lt~obsolete.m4
    opcodes/ChangeLog
    opcodes/Makefile.am
    opcodes/Makefile.in
    opcodes/aclocal.m4
    opcodes/configure
    opcodes/configure.in
    opcodes/i386-gen.c
    opcodes/i386-opc.tbl
    opcodes/i386-tbl.h
    opcodes/po/fr.po
    opcodes/po/vi.po
    opcodes/s390-opc.c
    opcodes/s390-opc.txt
    opcodes/z80-dis.c

45 files changed, 3177 insertions, 132 deletions

diff --git a/gold/ChangeLog b/gold/ChangeLog
index cac87e6..e13fa98 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,179 @@
+2008-10-07  Cary Coutant  <ccoutant@google.com>
+
+	* options.c (General_options::finalize): Add check for -static and
+	-shared.
+	* gold.cc (queue_middle_tasks): Assert that list of dynamic objects
+	is not empty.
+
+2008-10-02  Cary Coutant  <ccoutant@google.com>
+
+	* plugin.cc (make_sized_plugin_object): Fix conditional
+	compilation to work when not all targets are enabled.
+
+2008-09-29  Cary Coutant  <ccoutant@google.com>
+
+	* archive.cc (Archive::get_file_and_offset): Use filename instead
+	of name to get library path.
+	(Archive::include_member): Unlock external member of a thin archive.
+
+	* testsuite/Makefile.am (TEST_AR): New variable.
+	(thin_archive_test_1): New test.
+	(thin_archive_test_2): New test.
+	* testsuite/Makefile.in: Regenerate.
+	* testsuite/thin_archive_main.cc: New file.
+	* testsuite/thin_archive_test_1.cc: New file.
+	* testsuite/thin_archive_test_2.cc: New file.
+	* testsuite/thin_archive_test_3.cc: New file.
+	* testsuite/thin_archive_test_4.cc: New file.
+
+2008-09-29  Cary Coutant  <ccoutant@google.com>
+
+	* mapfile.cc (Mapfile::print_input_section): Change -1U to -1ULL.
+	* object.cc (Sized_relobj::do_layout): Use constant invalid_address
+	instead of -1U.
+	(Sized_relobj::do_finalize_local_symbols): Likewise.
+	(Sized_relobj::map_to_kept_section): Likewise.
+	* object.h (Sized_relobj::invalid_address): New constant.
+	(Sized_relobj::do_output_section_offset): Check for invalid_address
+	and return -1ULL.
+	* output.cc (Output_reloc::local_section_offset): Use constant
+	invalid_address instead of -1U.
+	(Output_reloc::get_address): Likewise.
+	(Output_section::output_address): Change -1U to -1ULL.
+	* output.h (Output_reloc::invalid_address): New constant.
+	* reloc.cc (Sized_relobj::write_sections): Use constant
+	invalid_address instead of -1U.
+	(Sized_relobj::relocate_sections): Likewise.
+	* symtab.cc (Symbol_table::sized_finalize_symbol): Handle symbol
+	values for merge sections.
+	* target-reloc.h (relocate_for_relocatable): Use constant
+	invalid_address instead of -1U.
+
+2008-09-19  Cary Coutant  <ccoutant@google.com>
+
+	Add plugin functionality for link-time optimization (LTO).
+	* configure.ac (plugins): Add --enable-plugins option.
+	* configure: Regenerate.
+	* config.in: Regenerate.
+	* Makefile.am (LIBDL): New variable.
+	(CCFILES): Add plugin.cc.
+	(HFILES): Add plugin.h.
+	(ldadd_var): Add LIBDL.
+	* Makefile.in: Regenerate.
+
+	* archive.cc: Include "plugin.h".
+	(Archive::setup): Don't preread archive symbols when using a plugin.
+	(Archive::get_file_and_offset): Add memsize parameter.  Change callers.
+	(Archive::get_elf_object_for_member): Call plugin hooks for claiming
+	files.
+	(Archive::include_member): Add symbols from plugin objects.
+	* archive.h (Archive::get_file_and_offset): Add memsize parameter.
+	* descriptors.cc (Descriptors::open): Check for file descriptors
+	abandoned by plugins.
+	(Descriptors::claim_for_plugin): New function.
+	* descriptors.h (Descriptors::claim_for_plugin): New function.
+	(Open_descriptor::is_claimed): New field.
+	(claim_descriptor_for_plugin): New function.
+	* fileread.cc (File_read::claim_for_plugin): New function.
+	* fileread.h (File_read::claim_for_plugin): New function.
+	(File_read::descriptor): New function.
+	* gold.cc: Include "plugin.h".
+	(queue_initial_tasks): Add task to call plugin hooks for generating
+	new object files.
+	* main.cc: Include "plugin.h".
+	(main): Load plugin libraries.
+	* object.h (Pluginobj): Declare.
+	(Object::pluginobj): New function.
+	(Object::do_pluginobj): New function.
+	(Object::set_target): New function.
+	* options.cc: Include "plugin.h".
+	(General_options::parse_plugin): New function.
+	(General_options::General_options): Initialize plugins_ field.
+	(General_options::add_plugin): New function.
+	* options.h (Plugin_manager): Declare.
+	(General_options): Add --plugin option.
+	(General_options::has_plugins): New function.
+	(General_options::plugins): New function.
+	(General_options::add_plugin): New function.
+	(General_options::plugins_): New field.
+	* plugin.cc: New file.
+	* plugin.h: New file.
+	* readsyms.cc: Include "plugin.h".
+	(Read_symbols::do_read_symbols): Check for archive before checking
+	for ELF file.  Call plugin hooks to claim files.
+	* resolve.cc (Symbol_table::resolve): Record when symbol is referenced
+	from a real object file; force override when processing replacement
+	files.
+	* symtab.cc (Symbol::init_fields): Initialize in_real_elf_ field.
+	(Symbol::init_base_object): Likewise.
+	(Symbol::init_base_output_data): Likewise.
+	(Symbol::init_base_output_segment): Likewise.
+	(Symbol::init_base_constant): Likewise.
+	(Symbol::init_base_undefined): Likewise.
+	(Symbol::output_section): Assert that object is not a plugin.
+	(Symbol_table::add_from_pluginobj): New function.
+	(Symbol_table::sized_finalize_symbol): Treat symbols from plugins as
+	undefined.
+	(Symbol_table::sized_write_globals): Likewise.
+	(Symbol_table::add_from_pluginobj): Instantiate template.
+	* symtab.h (Sized_pluginobj): Declare.
+	(Symbol::in_real_elf): New function.
+	(Symbol::set_in_real_elf): New function.
+	(Symbol::in_real_elf_): New field.
+	(Symbol_table::add_from_pluginobj): New function.
+
+	* testsuite/Makefile.am (AM_CFLAGS): New variable.
+	(LIBDL): New variable.
+	(LDADD): Add LIBDL.
+	(check_PROGRAMS): Add plugin_test_1 and plugin_test_2.
+	(check_SCRIPTS): Add plugin_test_1.sh and plugin_test_2.sh.
+	(check_DATA): Add plugin_test_1.err and plugin_test_2.err.
+	(MOSTLYCLEANFILES): Likewise.
+	* testsuite/Makefile.in: Regenerate.
+	* testsuite/plugin_test.c: New file.
+	* testsuite/plugin_test_1.sh: New file.
+	* testsuite/plugin_test_2.sh: New file.
+
+2008-09-16  Ian Lance Taylor  <iant@google.com>
+
+	* target-reloc.h (relocate_section): Check whether a symbol is
+	defined by the ABI before reporting an undefined symbol error.
+	* target.h (Target::is_defined_by_abi): Make parameter const.
+	(Target::do_is_defined_by_abi): Likewise.
+	* i386.cc (Target_i386::do_is_defined_by_abi): Likewise.
+	* powerpc.cc (Target_powerpc::do_is_defined_by_abi): Likewise.
+	* sparc.cc (Target_sparc::do_is_defined_by_abi): Likewise.
+	* x86_64.cc (Target_x86_64::do_is_defined_by_abi): Likewise.
+	* testsuite/Makefile.am (tls_test_shared.so): Add -Wl,-z,defs.
+	* testsuite/Makefile.in: Rebuild.
+
+	* fileread.cc (make_view): Add casts to avoid warning.
+
+2008-09-16  Alexandre Oliva  <aoliva@redhat.com>
+
+	* i386.cc (Target_i386::define_tls_base_symbol): Update comments.
+	* x86_64.cc (Target_x86_64::define_tls_base_symbol): Likewise.
+
+2008-09-16  Alexandre Oliva  <aoliva@redhat.com>
+
+	* options.h (General_options::output_is_executable): New.
+	(General_options::output_is_pie): New.
+	* i386.cc (Target_i386::define_tls_base_symbol): Use SEGMENT_START
+	for shared libraries.
+	* x86_64.cc (Target_x86_64::define_tls_base_symbol): Likewise.
+
+2008-09-11  Chris Demetriou  <cgd@google.com>
+
+	* options.h (origin): New -z option.
+	* layout.cc (Layout:finish_dynamic_section): If "-z origin"
+	is specified, set DF_ORIGIN in DT_FLAGS and set DF_1_ORIGIN
+	in DT_FLAGS_1.
+
+2008-09-05  Cary Coutant  <ccoutant@google.com>
+
+	* fileread.cc (File_read::make_view): Add check for attempt to map
+	beyond end of file.
+
 2008-09-05  Cary Coutant  <ccoutant@google.com>
 
 	* symtab.cc (Symbol_table::add_from_dynobj): Fix typos in
diff --git a/gold/Makefile.am b/gold/Makefile.am
index e706703..74db37a 100644
--- a/gold/Makefile.am
+++ b/gold/Makefile.am
@@ -19,6 +19,10 @@ INCLUDES = \
 
 LIBIBERTY = ../libiberty/libiberty.a
 
+if PLUGINS
+LIBDL = -ldl
+endif
+
 if THREADS
 THREADSLIB = -lpthread
 endif
@@ -53,6 +57,7 @@ CCFILES = \
 	options.cc \
 	output.cc \
 	parameters.cc \
+	plugin.cc \
 	readsyms.cc \
 	reduced_debug_output.cc \
 	reloc.cc \
@@ -90,6 +95,7 @@ HFILES = \
 	options.h \
 	output.h \
 	parameters.h \
+	plugin.h \
 	readsyms.h \
 	reduced_debug_output.h \
 	reloc.h \
@@ -122,7 +128,8 @@ libgold_a_SOURCES = $(CCFILES) $(HFILES) $(YFILES)
 
 sources_var = main.cc
 deps_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL_DEP)
-ldadd_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL) $(THREADSLIB)
+ldadd_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL) \
+	 $(THREADSLIB) $(LIBDL)
 
 ld_new_SOURCES = $(sources_var)
 ld_new_DEPENDENCIES = $(deps_var) $(LIBOBJS)
diff --git a/gold/Makefile.in b/gold/Makefile.in
index bbc5417..f6a80d0 100644
--- a/gold/Makefile.in
+++ b/gold/Makefile.in
@@ -82,7 +82,7 @@ am__objects_1 = archive.$(OBJEXT) binary.$(OBJEXT) common.$(OBJEXT) \
 	fileread.$(OBJEXT) gold.$(OBJEXT) gold-threads.$(OBJEXT) \
 	layout.$(OBJEXT) mapfile.$(OBJEXT) merge.$(OBJEXT) \
 	object.$(OBJEXT) options.$(OBJEXT) output.$(OBJEXT) \
-	parameters.$(OBJEXT) readsyms.$(OBJEXT) \
+	parameters.$(OBJEXT) plugin.$(OBJEXT) readsyms.$(OBJEXT) \
 	reduced_debug_output.$(OBJEXT) reloc.$(OBJEXT) \
 	resolve.$(OBJEXT) script-sections.$(OBJEXT) script.$(OBJEXT) \
 	stringpool.$(OBJEXT) symtab.$(OBJEXT) target-select.$(OBJEXT) \
@@ -101,7 +101,7 @@ am__DEPENDENCIES_1 =
 am__DEPENDENCIES_2 = ../libiberty/libiberty.a
 am__DEPENDENCIES_3 = $(am__DEPENDENCIES_1) libgold.a \
 	$(am__DEPENDENCIES_2) $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__DEPENDENCIES_4 = @LIBOBJS@
 am__ld1_SOURCES_DIST = main.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_ld1_OBJECTS = $(am__objects_4)
@@ -227,6 +227,8 @@ PACKAGE_STRING = @PACKAGE_STRING@
 PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
+PLUGINS_FALSE = @PLUGINS_FALSE@
+PLUGINS_TRUE = @PLUGINS_TRUE@
 POSUB = @POSUB@
 RANDOM_SEED_CFLAGS = @RANDOM_SEED_CFLAGS@
 RANLIB = @RANLIB@
@@ -308,6 +310,7 @@ INCLUDES = \
 	@INCINTL@
 
 LIBIBERTY = ../libiberty/libiberty.a
+@PLUGINS_TRUE@LIBDL = -ldl
 @THREADS_TRUE@THREADSLIB = -lpthread
 AM_YFLAGS = -d
 noinst_LIBRARIES = libgold.a
@@ -336,6 +339,7 @@ CCFILES = \
 	options.cc \
 	output.cc \
 	parameters.cc \
+	plugin.cc \
 	readsyms.cc \
 	reduced_debug_output.cc \
 	reloc.cc \
@@ -373,6 +377,7 @@ HFILES = \
 	options.h \
 	output.h \
 	parameters.h \
+	plugin.h \
 	readsyms.h \
 	reduced_debug_output.h \
 	reloc.h \
@@ -403,7 +408,9 @@ ALL_TARGETOBJS = \
 libgold_a_SOURCES = $(CCFILES) $(HFILES) $(YFILES)
 sources_var = main.cc
 deps_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL_DEP)
-ldadd_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL) $(THREADSLIB)
+ldadd_var = $(TARGETOBJS) libgold.a $(LIBIBERTY) $(LIBINTL) \
+	 $(THREADSLIB) $(LIBDL)
+
 ld_new_SOURCES = $(sources_var)
 ld_new_DEPENDENCIES = $(deps_var) $(LIBOBJS)
 ld_new_LDADD = $(ldadd_var) $(LIBOBJS)
@@ -550,6 +557,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/options.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/output.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/parameters.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/powerpc.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/readsyms.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/reduced_debug_output.Po@am__quote@
diff --git a/gold/archive.cc b/gold/archive.cc
index f5ad574..7e2d143 100644
--- a/gold/archive.cc
+++ b/gold/archive.cc
@@ -37,6 +37,7 @@
 #include "symtab.h"
 #include "object.h"
 #include "archive.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -126,6 +127,9 @@ Archive::setup(Input_objects* input_objects)
                        && parameters->options().preread_archive_symbols());
 #ifndef ENABLE_THREADS
   preread_syms = false;
+#else
+  if (parameters->options().has_plugins())
+    preread_syms = false;
 #endif
   if (preread_syms)
     this->read_all_symbols(input_objects);
@@ -439,11 +443,11 @@ Archive::end()
 bool
 Archive::get_file_and_offset(off_t off, Input_objects* input_objects,
                              Input_file** input_file, off_t* memoff,
-                             std::string* member_name)
+                             off_t* memsize, std::string* member_name)
 {
   off_t nested_off;
 
-  this->read_header(off, false, member_name, &nested_off);
+  *memsize = this->read_header(off, false, member_name, &nested_off);
 
   *input_file = this->input_file_;
   *memoff = off + static_cast<off_t>(sizeof(Archive_header));
@@ -455,11 +459,11 @@ Archive::get_file_and_offset(off_t off, Input_objects* input_objects,
   // to the directory containing the archive.
   if (!IS_ABSOLUTE_PATH(member_name->c_str()))
     {
-      const char* arch_path = this->name().c_str();
+      const char* arch_path = this->filename().c_str();
       const char* basename = lbasename(arch_path);
       if (basename > arch_path)
         member_name->replace(0, 0,
-                             this->name().substr(0, basename - arch_path));
+                             this->filename().substr(0, basename - arch_path));
     }
 
   if (nested_off > 0)
@@ -488,8 +492,8 @@ Archive::get_file_and_offset(off_t off, Input_objects* input_objects,
             this->nested_archives_.insert(std::make_pair(*member_name, arch));
           gold_assert(ins.second);
         }
-      return arch->get_file_and_offset(nested_off, input_objects,
-                                       input_file, memoff, member_name);
+      return arch->get_file_and_offset(nested_off, input_objects, input_file,
+                                       memoff, memsize, member_name);
     }
 
   // This is an external member of a thin archive.  Open the
@@ -503,6 +507,7 @@ Archive::get_file_and_offset(off_t off, Input_objects* input_objects,
     return false;
 
   *memoff = 0;
+  *memsize = (*input_file)->file().filesize();
   return true;
 }
 
@@ -515,11 +520,26 @@ Archive::get_elf_object_for_member(off_t off, Input_objects* input_objects)
   std::string member_name;
   Input_file* input_file;
   off_t memoff;
+  off_t memsize;
 
   if (!this->get_file_and_offset(off, input_objects, &input_file, &memoff,
-                                 &member_name))
+                                 &memsize, &member_name))
     return NULL;
 
+  if (parameters->options().has_plugins())
+    {
+      Object* obj = parameters->options().plugins()->claim_file(input_file,
+                                                                memoff,
+                                                                memsize);
+      if (obj != NULL)
+        {
+          // The input file was claimed by a plugin, and its symbols
+          // have been provided by the plugin.
+	  input_file->file().claim_for_plugin();
+          return obj;
+        }
+    }
+
   off_t filesize = input_file->file().filesize();
   int read_size = elfcpp::Elf_sizes<64>::ehdr_size;
   if (filesize - memoff < read_size)
@@ -753,12 +773,24 @@ Archive::include_member(Symbol_table* symtab, Layout* layout,
   if (mapfile != NULL)
     mapfile->report_include_archive_member(obj->name(), sym, why);
 
+  Pluginobj* pluginobj = obj->pluginobj();
+  if (pluginobj != NULL)
+    {
+      pluginobj->add_symbols(symtab, layout);
+      return;
+    }
+
   if (input_objects->add_object(obj))
     {
       Read_symbols_data sd;
       obj->read_symbols(&sd);
       obj->layout(symtab, layout, &sd);
       obj->add_symbols(symtab, &sd);
+
+      // If this is an external member of a thin archive, unlock the file
+      // for the next task.
+      if (obj->offset() == 0)
+        obj->unlock(this->task_);
     }
   else
     {
diff --git a/gold/archive.h b/gold/archive.h
index 24fdb2b..6b99aed 100644
--- a/gold/archive.h
+++ b/gold/archive.h
@@ -184,7 +184,7 @@ class Archive
   bool
   get_file_and_offset(off_t off, Input_objects* input_objects,
                       Input_file** input_file, off_t* memoff,
-                      std::string* member_name);
+                      off_t* memsize, std::string* member_name);
 
   // Return an ELF object for the member at offset OFF.  Set *MEMBER_NAME to
   // the name of the member.
diff --git a/gold/config.in b/gold/config.in
index 73cc6e9..309f84b6 100644
--- a/gold/config.in
+++ b/gold/config.in
@@ -4,6 +4,9 @@
    language is requested. */
 #undef ENABLE_NLS
 
+/* Define to enable linker plugins */
+#undef ENABLE_PLUGINS
+
 /* Define to do multi-threaded linking */
 #undef ENABLE_THREADS
 
diff --git a/gold/configure b/gold/configure
index f2ec1ef..d898870 100755
--- a/gold/configure
+++ b/gold/configure
@@ -309,7 +309,7 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar THREADS_TRUE THREADS_FALSE TARGETOBJS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE YACC RANLIB ac_ct_RANLIB LN_S USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT MKINSTALLDIRS MSGFMT MSGMERGE NATIVE_LINKER_TRUE NATIVE_LINKER_FALSE GCC_TRUE GCC_FALSE FN_PTRS_IN_SO_WITHOUT_PIC_TRUE FN_PTRS_IN_SO_WITHOUT_PIC_FALSE TLS_TRUE TLS_FALSE STATIC_TLS_TRUE STATIC_TLS_FALSE OMP_SUPPORT_TRUE OMP_SUPPORT_FALSE TLS_GNU2_DIALECT_TRUE TLS_GNU2_DIALECT_FALSE TLS_DESCRIPTORS_TRUE TLS_DESCRIPTORS_FALSE CONSTRUCTOR_PRIORITY_TRUE CONSTRUCTOR_PRIORITY_FALSE RANDOM_SEED_CFLAGS WARN_CFLAGS NO_WERROR WARN_CXXFLAGS LFS_CFLAGS LIBOBJS CPP EGREP HAVE_ZLIB_TRUE HAVE_ZLIB_FALSE CXXCPP MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT LTLIBOBJS'
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS build build_cpu build_vendor build_os host host_cpu host_vendor host_os target target_cpu target_vendor target_os INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CYGPATH_W PACKAGE VERSION ACLOCAL AUTOCONF AUTOMAKE AUTOHEADER MAKEINFO install_sh STRIP ac_ct_STRIP INSTALL_STRIP_PROGRAM mkdir_p AWK SET_MAKE am__leading_dot AMTAR am__tar am__untar THREADS_TRUE THREADS_FALSE PLUGINS_TRUE PLUGINS_FALSE TARGETOBJS CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT DEPDIR am__include am__quote AMDEP_TRUE AMDEP_FALSE AMDEPBACKSLASH CCDEPMODE am__fastdepCC_TRUE am__fastdepCC_FALSE CXX CXXFLAGS ac_ct_CXX CXXDEPMODE am__fastdepCXX_TRUE am__fastdepCXX_FALSE YACC RANLIB ac_ct_RANLIB LN_S USE_NLS LIBINTL LIBINTL_DEP INCINTL XGETTEXT GMSGFMT POSUB CATALOGS DATADIRNAME INSTOBJEXT GENCAT CATOBJEXT MKINSTALLDIRS MSGFMT MSGMERGE NATIVE_LINKER_TRUE NATIVE_LINKER_FALSE GCC_TRUE GCC_FALSE FN_PTRS_IN_SO_WITHOUT_PIC_TRUE FN_PTRS_IN_SO_WITHOUT_PIC_FALSE TLS_TRUE TLS_FALSE STATIC_TLS_TRUE STATIC_TLS_FALSE OMP_SUPPORT_TRUE OMP_SUPPORT_FALSE TLS_GNU2_DIALECT_TRUE TLS_GNU2_DIALECT_FALSE TLS_DESCRIPTORS_TRUE TLS_DESCRIPTORS_FALSE CONSTRUCTOR_PRIORITY_TRUE CONSTRUCTOR_PRIORITY_FALSE RANDOM_SEED_CFLAGS WARN_CFLAGS NO_WERROR WARN_CXXFLAGS LFS_CFLAGS LIBOBJS CPP EGREP HAVE_ZLIB_TRUE HAVE_ZLIB_FALSE CXXCPP MAINTAINER_MODE_TRUE MAINTAINER_MODE_FALSE MAINT LTLIBOBJS'
 ac_subst_files=''
 ac_pwd=`pwd`
 
@@ -866,6 +866,7 @@ Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-threads        multi-threaded linking
+  --enable-plugins        linker plugins
   --enable-targets        alternative target configurations
   --disable-dependency-tracking  speeds up one-time build
   --enable-dependency-tracking   do not reject slow dependency extractors
@@ -1959,6 +1960,35 @@ else
 fi
 
 
+# Check whether --enable-plugins or --disable-plugins was given.
+if test "${enable_plugins+set}" = set; then
+  enableval="$enable_plugins"
+  case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac
+else
+  plugins=no
+fi;
+if test "$plugins" = "yes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define ENABLE_PLUGINS 1
+_ACEOF
+
+fi
+
+
+if test "$plugins" = "yes"; then
+  PLUGINS_TRUE=
+  PLUGINS_FALSE='#'
+else
+  PLUGINS_TRUE='#'
+  PLUGINS_FALSE=
+fi
+
+
 # Check whether --enable-targets or --disable-targets was given.
 if test "${enable_targets+set}" = set; then
   enableval="$enable_targets"
@@ -6720,6 +6750,13 @@ echo "$as_me: error: conditional \"THREADS\" was never defined.
 Usually this means the macro was only invoked conditionally." >&2;}
    { (exit 1); exit 1; }; }
 fi
+if test -z "${PLUGINS_TRUE}" && test -z "${PLUGINS_FALSE}"; then
+  { { echo "$as_me:$LINENO: error: conditional \"PLUGINS\" was never defined.
+Usually this means the macro was only invoked conditionally." >&5
+echo "$as_me: error: conditional \"PLUGINS\" was never defined.
+Usually this means the macro was only invoked conditionally." >&2;}
+   { (exit 1); exit 1; }; }
+fi
 if test -z "${AMDEP_TRUE}" && test -z "${AMDEP_FALSE}"; then
   { { echo "$as_me:$LINENO: error: conditional \"AMDEP\" was never defined.
 Usually this means the macro was only invoked conditionally." >&5
@@ -7396,6 +7433,8 @@ s,@am__tar@,$am__tar,;t t
 s,@am__untar@,$am__untar,;t t
 s,@THREADS_TRUE@,$THREADS_TRUE,;t t
 s,@THREADS_FALSE@,$THREADS_FALSE,;t t
+s,@PLUGINS_TRUE@,$PLUGINS_TRUE,;t t
+s,@PLUGINS_FALSE@,$PLUGINS_FALSE,;t t
 s,@TARGETOBJS@,$TARGETOBJS,;t t
 s,@CC@,$CC,;t t
 s,@CFLAGS@,$CFLAGS,;t t
diff --git a/gold/configure.ac b/gold/configure.ac
index 3fbcd0e..b0efef1 100644
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -53,6 +53,20 @@ if test "$threads" = "yes"; then
 fi
 AM_CONDITIONAL(THREADS, test "$threads" = "yes")
 
+AC_ARG_ENABLE([plugins],
+[  --enable-plugins        linker plugins],
+[case "${enableval}" in
+  yes | "") plugins=yes ;;
+  no) plugins=no ;;
+  *) plugins=yes ;;
+ esac],
+[plugins=no])
+if test "$plugins" = "yes"; then
+  AC_DEFINE(ENABLE_PLUGINS, 1,
+	    [Define to enable linker plugins])
+fi
+AM_CONDITIONAL(PLUGINS, test "$plugins" = "yes")
+
 AC_ARG_ENABLE([targets],
 [  --enable-targets        alternative target configurations],
 [case "${enableval}" in
diff --git a/gold/descriptors.cc b/gold/descriptors.cc
index 75a7a86..73c03bf 100644
--- a/gold/descriptors.cc
+++ b/gold/descriptors.cc
@@ -115,7 +115,9 @@ Descriptors::open(int descriptor, const char* name, int flags, int mode)
 	  pod->inuse = true;
 	  pod->is_write = (flags & O_ACCMODE) != O_RDONLY;
 
-	  ++this->current_;
+          if (!pod->is_claimed)
+	    ++this->current_;
+          pod->is_claimed = false;
 	  if (this->current_ >= this->limit_)
 	    this->close_some_descriptor();
 
@@ -166,6 +168,24 @@ Descriptors::release(int descriptor, bool permanent)
     }
 }
 
+// Claim the file descriptor DESCRIPTOR for a plugin.  This effectively
+// removes the descriptor from the pool of linker-managed descriptors,
+// as the plugin will assume responsibility for closing it.
+// The IS_CLAIMED flag allows us to recognize when a file descriptor
+// has been reused after being closed by the plugin.
+
+void
+Descriptors::claim_for_plugin(int descriptor)
+{
+  Hold_lock hl(*this->lock_);
+
+  gold_assert(descriptor >= 0
+	      && (static_cast<size_t>(descriptor)
+		  < this->open_descriptors_.size()));
+  Open_descriptor* pod = &this->open_descriptors_[descriptor];
+  pod->is_claimed = true;
+}
+
 // Close some descriptor.  The lock is held when this is called.  We
 // close the descriptor on the top of the free stack.  Note that this
 // is the opposite of an LRU algorithm--we close the most recently
diff --git a/gold/descriptors.h b/gold/descriptors.h
index 6a6ab61..359008c 100644
--- a/gold/descriptors.h
+++ b/gold/descriptors.h
@@ -56,6 +56,12 @@ class Descriptors
   void
   release(int descriptor, bool permanent);
 
+  // Claim the file descriptor DESCRIPTOR for a plugin.  This effectively
+  // removes the descriptor from the pool of linker-managed descriptors,
+  // as the plugin will assume responsibility for closing it.
+  void
+  claim_for_plugin(int descriptor);
+
  private:
   // Information kept for a descriptor.
   struct Open_descriptor
@@ -69,6 +75,8 @@ class Descriptors
     bool inuse;
     // Whether this is a write descriptor.
     bool is_write;
+    // Whether the descriptor has been claimed for a plugin.
+    bool is_claimed;
   };
 
   bool
@@ -100,6 +108,10 @@ inline void
 release_descriptor(int descriptor, bool permanent)
 { descriptors.release(descriptor, permanent); }
 
+inline void
+claim_descriptor_for_plugin(int descriptor)
+{ descriptors.claim_for_plugin(descriptor); }
+
 } // End namespace gold.
 
 #endif // !defined(GOLD_DESCRIPTORS_H)
diff --git a/gold/fileread.cc b/gold/fileread.cc
index 8c2f8f3..72abd6b 100644
--- a/gold/fileread.cc
+++ b/gold/fileread.cc
@@ -191,6 +191,19 @@ File_read::release()
   this->released_ = true;
 }
 
+// Claim the file for a plugin.  This effectively releases the file without
+// closing it; the plugin will assume responsibility for closing it.
+
+void
+File_read::claim_for_plugin()
+{
+  gold_assert(this->is_locked());
+  claim_descriptor_for_plugin(this->descriptor_);
+  this->descriptor_ = -1;
+  this->is_descriptor_opened_ = false;
+  this->released_ = true;
+}
+
 // Lock the file.
 
 void
@@ -355,6 +368,16 @@ File_read::make_view(off_t start, section_size_type size,
 {
   gold_assert(size > 0);
 
+  // Check that start and end of the view are within the file.
+  if (start > this->size_
+      || (static_cast<unsigned long long>(size)
+          > static_cast<unsigned long long>(this->size_ - start)))
+    gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
+                 "size of file; the file may be corrupt"),
+		   this->filename().c_str(),
+		   static_cast<long long>(size),
+		   static_cast<long long>(start));
+
   off_t poff = File_read::page_offset(start);
 
   section_size_type psize = File_read::pages(size + (start - poff));
diff --git a/gold/fileread.h b/gold/fileread.h
index 4236ce0..1b776f1 100644
--- a/gold/fileread.h
+++ b/gold/fileread.h
@@ -109,6 +109,11 @@ class File_read
   void
   release();
 
+  // Claim the file for a plugin.  This effectively releases the file without
+  // closing it; the plugin will assume responsibility for closing it.
+  void
+  claim_for_plugin();
+
   // Return the size of the file.
   off_t
   filesize() const
@@ -183,6 +188,14 @@ class File_read
   static void
   print_stats();
 
+  // Return the open file descriptor (for plugins).
+  int
+  descriptor() const
+  {
+    gold_assert(this->descriptor_ >= 0);
+    return this->descriptor_;
+  }
+
  private:
   // This class may not be copied.
   File_read(const File_read&);
diff --git a/gold/gold.cc b/gold/gold.cc
index 42c6248..ac321be 100644
--- a/gold/gold.cc
+++ b/gold/gold.cc
@@ -40,6 +40,7 @@
 #include "layout.h"
 #include "reloc.h"
 #include "defstd.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -151,6 +152,16 @@ queue_initial_tasks(const General_options& options,
       this_blocker = next_blocker;
     }
 
+  if (options.has_plugins())
+    {
+      Task_token* next_blocker = new Task_token(true);
+      next_blocker->add_blocker();
+      workqueue->queue(new Plugin_hook(options, input_objects, symtab, layout,
+				       &search_path, mapfile, this_blocker,
+				       next_blocker));
+      this_blocker = next_blocker;
+    }
+
   workqueue->queue(new Task_function(new Middle_runner(options,
 						       input_objects,
 						       symtab,
@@ -192,6 +203,7 @@ queue_middle_tasks(const General_options& options,
   if (!doing_static_link && options.is_static())
     {
       // We print out just the first .so we see; there may be others.
+      gold_assert(input_objects->dynobj_begin() != input_objects->dynobj_end());
       gold_error(_("cannot mix -static with dynamic object %s"),
 		 (*input_objects->dynobj_begin())->name().c_str());
     }
diff --git a/gold/i386.cc b/gold/i386.cc
index 54f1233..8a5558e 100644
--- a/gold/i386.cc
+++ b/gold/i386.cc
@@ -135,7 +135,7 @@ class Target_i386 : public Sized_target<32, false>
 
   // Return whether SYM is defined by the ABI.
   bool
-  do_is_defined_by_abi(Symbol* sym) const
+  do_is_defined_by_abi(const Symbol* sym) const
   { return strcmp(sym->name(), "___tls_get_addr") == 0; }
 
   // Return the size of the GOT section.
@@ -323,7 +323,7 @@ class Target_i386 : public Sized_target<32, false>
   void
   make_plt_entry(Symbol_table*, Layout*, Symbol*);
 
-  // Define the _TLS_MODULE_BASE_ symbol at the end of the TLS segment.
+  // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
   void
   define_tls_base_symbol(Symbol_table*, Layout*);
 
@@ -736,7 +736,7 @@ Target_i386::make_plt_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym)
   this->plt_->add_entry(gsym);
 }
 
-// Define the _TLS_MODULE_BASE_ symbol at the end of the TLS segment.
+// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
 
 void
 Target_i386::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
@@ -747,12 +747,16 @@ Target_i386::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
   Output_segment* tls_segment = layout->tls_segment();
   if (tls_segment != NULL)
     {
+      bool is_exec = parameters->options().output_is_executable();
       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);
+				       (is_exec
+					? Symbol::SEGMENT_END
+					: Symbol::SEGMENT_START),
+				       true);
     }
   this->tls_base_symbol_defined_ = true;
 }
diff --git a/gold/layout.cc b/gold/layout.cc
index 99819d6..ec9654e 100644
--- a/gold/layout.cc
+++ b/gold/layout.cc
@@ -2753,6 +2753,8 @@ Layout::finish_dynamic_section(const Input_objects* input_objects,
     }
   if (parameters->options().shared() && this->has_static_tls())
     flags |= elfcpp::DF_STATIC_TLS;
+  if (parameters->options().origin())
+    flags |= elfcpp::DF_ORIGIN;
   odyn->add_constant(elfcpp::DT_FLAGS, flags);
 
   flags = 0;
@@ -2774,6 +2776,8 @@ Layout::finish_dynamic_section(const Input_objects* input_objects,
     flags &= ~(elfcpp::DF_1_INITFIRST
 	       | elfcpp::DF_1_NODELETE
 	       | elfcpp::DF_1_NOOPEN);
+  if (parameters->options().origin())
+    flags |= elfcpp::DF_1_ORIGIN;
   if (flags)
     odyn->add_constant(elfcpp::DT_FLAGS_1, flags);
 }
diff --git a/gold/main.cc b/gold/main.cc
index b842159..8e8e8f9 100644
--- a/gold/main.cc
+++ b/gold/main.cc
@@ -42,6 +42,7 @@
 #include "archive.h"
 #include "symtab.h"
 #include "layout.h"
+#include "plugin.h"
 
 using namespace gold;
 
@@ -190,6 +191,10 @@ main(int argc, char** argv)
   if (parameters->options().relocatable())
     command_line.script_options().version_script_info()->clear();
 
+  // Load plugin libraries.
+  if (command_line.options().has_plugins())
+    command_line.options().plugins()->load_plugins();
+
   // The work queue.
   Workqueue workqueue(command_line.options());
 
diff --git a/gold/mapfile.cc b/gold/mapfile.cc
index 9cec366..a3ba52b 100644
--- a/gold/mapfile.cc
+++ b/gold/mapfile.cc
@@ -253,7 +253,7 @@ Mapfile::print_input_section(Relobj* relobj, unsigned int shndx)
     {
       os = relobj->output_section(shndx);
       addr = relobj->output_section_offset(shndx);
-      if (addr != -1U)
+      if (addr != -1ULL)
 	addr += os->address();
     }
 
diff --git a/gold/object.cc b/gold/object.cc
index d8f5ec8..f7dcda8 100644
--- a/gold/object.cc
+++ b/gold/object.cc
@@ -926,7 +926,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
 	{
 	  // Do not include this section in the link.
 	  out_sections[i] = NULL;
-          out_section_offsets[i] = -1U;
+          out_section_offsets[i] = invalid_address;
 	  continue;
 	}
 
@@ -967,7 +967,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
 
       out_sections[i] = os;
       if (offset == -1)
-        out_section_offsets[i] = -1U;
+        out_section_offsets[i] = invalid_address;
       else
         out_section_offsets[i] = convert_types<Address, off_t>(offset);
 
@@ -1004,7 +1004,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
       if (data_section == NULL)
 	{
 	  out_sections[i] = NULL;
-          out_section_offsets[i] = -1U;
+          out_section_offsets[i] = invalid_address;
 	  continue;
 	}
 
@@ -1014,7 +1014,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
       Output_section* os = layout->layout_reloc(this, i, shdr, data_section,
 						rr);
       out_sections[i] = os;
-      out_section_offsets[i] = -1U;
+      out_section_offsets[i] = invalid_address;
     }
 
   // Handle the .eh_frame sections at the end.
@@ -1042,7 +1042,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
 						   &offset);
       out_sections[i] = os;
       if (offset == -1)
-        out_section_offsets[i] = -1U;
+        out_section_offsets[i] = invalid_address;
       else
         out_section_offsets[i] = convert_types<Address, off_t>(offset);
 
@@ -1266,7 +1266,7 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
               // so we leave the input value unchanged here.
 	      continue;
 	    }
-	  else if (out_offsets[shndx] == -1U)
+	  else if (out_offsets[shndx] == invalid_address)
 	    {
 	      // This is a SHF_MERGE section or one which otherwise
 	      // requires special handling.  We get the output address
@@ -1573,7 +1573,7 @@ Sized_relobj<size, big_endian>::map_to_kept_section(
       *found = true;
       Output_section* os = kept->object_->output_section(kept->shndx_);
       Address offset = kept->object_->get_output_section_offset(kept->shndx_);
-      gold_assert(os != NULL && offset != -1U);
+      gold_assert(os != NULL && offset != invalid_address);
       return os->address() + offset;
     }
   *found = false;
diff --git a/gold/object.h b/gold/object.h
index 188f1f2..fcb5d31 100644
--- a/gold/object.h
+++ b/gold/object.h
@@ -42,6 +42,7 @@ class Layout;
 class Output_section;
 class Output_file;
 class Output_symtab_xindex;
+class Pluginobj;
 class Dynobj;
 class Object_merge_map;
 class Relocatable_relocs;
@@ -214,6 +215,12 @@ class Object
   is_dynamic() const
   { return this->is_dynamic_; }
 
+  // Returns NULL for Objects that are not plugin objects.  This method
+  // is overridden in the Pluginobj class.
+  Pluginobj*
+  pluginobj()
+  { return this->do_pluginobj(); }
+
   // Return the target structure associated with this object.
   Target*
   target() const
@@ -431,7 +438,18 @@ class Object
 			   size_t* used) const
   { this->do_get_global_symbol_counts(symtab, defined, used); }
 
+  // Set the target.
+  void
+  set_target(Target* target)
+  { this->target_ = target; }
+
  protected:
+  // Returns NULL for Objects that are not plugin objects.  This method
+  // is overridden in the Pluginobj class.
+  virtual Pluginobj*
+  do_pluginobj()
+  { return NULL; }
+
   // Read the symbols--implemented by child class.
   virtual void
   do_read_symbols(Read_symbols_data*) = 0;
@@ -1184,6 +1202,8 @@ class Sized_relobj : public Relobj
   typedef std::vector<Symbol*> Symbols;
   typedef std::vector<Symbol_value<size> > Local_values;
 
+  static const Address invalid_address = static_cast<Address>(0) - 1;
+
   Sized_relobj(const std::string& name, Input_file* input_file, off_t offset,
 	       const typename elfcpp::Ehdr<size, big_endian>&);
 
@@ -1439,7 +1459,12 @@ class Sized_relobj : public Relobj
   // Get the offset of a section.
   uint64_t
   do_output_section_offset(unsigned int shndx) const
-  { return this->get_output_section_offset(shndx); }
+  {
+    Address off = this->get_output_section_offset(shndx);
+    if (off == invalid_address)
+      return -1ULL;
+    return off;
+  }
 
   // Set the offset of a section.
   void
@@ -1681,7 +1706,7 @@ class Sized_relobj : public Relobj
   // for TLS symbols, indexed by symbol number.
   Local_got_offsets local_got_offsets_;
   // For each input section, the offset of the input section in its
-  // output section.  This is -1U if the input section requires a
+  // output section.  This is INVALID_ADDRESS if the input section requires a
   // special mapping.
   std::vector<Address> section_offsets_;
   // Table mapping discarded comdat sections to corresponding kept sections.
diff --git a/gold/options.cc b/gold/options.cc
index 78f0b1a..069c138 100644
--- a/gold/options.cc
+++ b/gold/options.cc
@@ -36,6 +36,7 @@
 #include "script.h"
 #include "target-select.h"
 #include "options.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -296,6 +297,15 @@ General_options::parse_library(const char*, const char* arg,
   cmdline->inputs().add_file(file);
 }
 
+#ifdef ENABLE_PLUGINS
+void
+General_options::parse_plugin(const char*, const char* arg,
+                              Command_line*)
+{
+  this->add_plugin(arg);
+}
+#endif // ENABLE_PLUGINS
+
 void
 General_options::parse_R(const char* option, const char* arg,
                          Command_line* cmdline)
@@ -594,7 +604,7 @@ namespace gold
 
 General_options::General_options()
   : execstack_status_(General_options::EXECSTACK_FROM_INPUT), static_(false),
-    do_demangle_(false)
+    do_demangle_(false), plugins_()
 {
 }
 
@@ -632,6 +642,16 @@ General_options::add_sysroot()
   free(canonical_sysroot);
 }
 
+// Add a plugin and its arguments to the list of plugins.
+
+void
+General_options::add_plugin(const char* arg)
+{
+  if (this->plugins_ == NULL)
+    this->plugins_ = new Plugin_manager(*this);
+  this->plugins_->add_plugin(arg);
+}
+
 // Set up variables and other state that isn't set up automatically by
 // the parse routine, and ensure options don't contradict each other
 // and are otherwise kosher.
@@ -772,6 +792,9 @@ General_options::finalize()
   this->add_sysroot();
 
   // Now that we've normalized the options, check for contradictory ones.
+  if (this->shared() && this->is_static())
+    gold_fatal(_("-shared and -static are incompatible"));
+
   if (this->shared() && this->relocatable())
     gold_fatal(_("-shared and -r are incompatible"));
 
diff --git a/gold/options.h b/gold/options.h
index 46ad761..167e58a 100644
--- a/gold/options.h
+++ b/gold/options.h
@@ -54,6 +54,7 @@ class Search_directory;
 class Input_file_group;
 class Position_dependent_options;
 class Target;
+class Plugin_manager;
 
 // The nested namespace is to contain all the global variables and
 // structs that need to be defined in the .h file, but do not need to
@@ -689,8 +690,14 @@ class General_options
   DEFINE_string(oformat, options::EXACTLY_TWO_DASHES, '\0', "elf",
 		N_("Set output format"), N_("[binary]"));
 
+#ifdef ENABLE_PLUGINS
+  DEFINE_special(plugin, options::TWO_DASHES, '\0',
+                 N_("Load a plugin library"), N_("PLUGIN[,ARG,...]"));
+#endif
+
   DEFINE_bool(preread_archive_symbols, options::TWO_DASHES, '\0', false,
               N_("Preread archive symbols when multi-threaded"), NULL);
+
   DEFINE_string(print_symbol_counts, options::TWO_DASHES, '\0', NULL,
 		N_("Print symbols defined and used for each input"),
 		N_("FILENAME"));
@@ -837,6 +844,9 @@ class General_options
   DEFINE_bool(relro, options::DASH_Z, '\0', false,
 	      N_("Where possible mark variables read-only after relocation"),
 	      N_("Don't mark variables read-only after relocation"));
+  DEFINE_bool(origin, options::DASH_Z, '\0', false,
+	      N_("Mark DSO to indicate that needs immediate $ORIGIN "
+                 "processing at runtime"), NULL);
 
  public:
   typedef options::Dir_list Dir_list;
@@ -862,6 +872,20 @@ class General_options
   output_is_position_independent() const
   { return this->shared(); }
 
+  // Return true if the output is something that can be exec()ed, such
+  // as a static executable, or a position-dependent or
+  // position-independent executable, but not a dynamic library or an
+  // object file.
+  bool
+  output_is_executable() const
+  { return !this->shared() || this->output_is_pie(); }
+
+  // Return true if the output is a position-independent executable.
+  // This is currently not supported.
+  bool
+  output_is_pie() const
+  { return false; }
+
   // This would normally be static(), and defined automatically, but
   // since static is a keyword, we need to come up with our own name.
   bool
@@ -899,6 +923,16 @@ class General_options
   do_demangle() const
   { return this->do_demangle_; }
 
+  // Returns TRUE if any plugin libraries have been loaded.
+  bool
+  has_plugins() const
+  { return this->plugins_ != NULL; }
+
+  // Return a pointer to the plugin manager.
+  Plugin_manager*
+  plugins() const
+  { return this->plugins_; }
+
  private:
   // Don't copy this structure.
   General_options(const General_options&);
@@ -936,12 +970,18 @@ class General_options
   void
   add_sysroot();
 
+  // Add a plugin and its arguments to the list of plugins.
+  void
+  add_plugin(const char* arg);
+
   // Whether to mark the stack as executable.
   Execstack execstack_status_;
   // Whether to do a static link.
   bool static_;
   // Whether to do demangling.
   bool do_demangle_;
+  // List of plugin libraries.
+  Plugin_manager* plugins_;
 };
 
 // The position-dependent options.  We use this to store the state of
diff --git a/gold/output.cc b/gold/output.cc
index 2a46195..f6a6f1d 100644
--- a/gold/output.cc
+++ b/gold/output.cc
@@ -838,11 +838,11 @@ Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::
   Output_section* os = this->u1_.relobj->output_section(lsi);
   gold_assert(os != NULL);
   Address offset = this->u1_.relobj->get_output_section_offset(lsi);
-  if (offset != -1U)
+  if (offset != invalid_address)
     return offset + addend;
   // This is a merge section.
   offset = os->output_address(this->u1_.relobj, lsi, addend);
-  gold_assert(offset != -1U);
+  gold_assert(offset != invalid_address);
   return offset;
 }
 
@@ -858,13 +858,13 @@ Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>::get_address() const
       Output_section* os = this->u2_.relobj->output_section(this->shndx_);
       gold_assert(os != NULL);
       Address off = this->u2_.relobj->get_output_section_offset(this->shndx_);
-      if (off != -1U)
+      if (off != invalid_address)
 	address += os->address() + off;
       else
 	{
 	  address = os->output_address(this->u2_.relobj, this->shndx_,
 				       address);
-	  gold_assert(address != -1U);
+	  gold_assert(address != invalid_address);
 	}
     }
   else if (this->u2_.od != NULL)
@@ -2043,7 +2043,7 @@ Output_section::output_address(const Relobj* object, unsigned int shndx,
       if (p->output_offset(object, shndx, offset, &output_offset))
 	{
 	  if (output_offset == -1)
-	    return -1U;
+	    return -1ULL;
 	  return addr + output_offset;
 	}
       addr += p->data_size();
diff --git a/gold/output.h b/gold/output.h
index 1c95881..9f075be 100644
--- a/gold/output.h
+++ b/gold/output.h
@@ -874,6 +874,8 @@ class Output_reloc<elfcpp::SHT_REL, dynamic, size, big_endian>
   typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
   typedef typename elfcpp::Elf_types<size>::Elf_Addr Addend;
 
+  static const Address invalid_address = static_cast<Address>(0) - 1;
+
   // An uninitialized entry.  We need this because we want to put
   // instances of this class into an STL container.
   Output_reloc()
@@ -1915,7 +1917,7 @@ class Output_section : public Output_data
 
   // Add a new input section SHNDX, named NAME, with header SHDR, from
   // object OBJECT.  RELOC_SHNDX is the index of a relocation section
-  // which applies to this section, or 0 if none, or -1U if more than
+  // which applies to this section, or 0 if none, or -1 if more than
   // one.  HAVE_SECTIONS_SCRIPT is true if we have a SECTIONS clause
   // in a linker script; in that case we need to keep track of input
   // sections associated with an output section.  Return the offset
diff --git a/gold/plugin.cc b/gold/plugin.cc
new file mode 100644
index 0000000..a5f7a06
--- /dev/null
+++ b/gold/plugin.cc
@@ -0,0 +1,984 @@
+// plugin.c -- plugin manager for gold      -*- C++ -*-
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include <cstdio>
+#include <cstdarg>
+#include <cstring>
+#include <string>
+#include <vector>
+#include <dlfcn.h>
+
+#include "gold.h"
+#include "parameters.h"
+#include "errors.h"
+#include "fileread.h"
+#include "layout.h"
+#include "options.h"
+#include "plugin.h"
+#include "target.h"
+#include "readsyms.h"
+#include "symtab.h"
+#include "elfcpp.h"
+
+namespace gold
+{
+
+#ifdef ENABLE_PLUGINS
+
+// The linker's exported interfaces.
+
+extern "C"
+{
+
+static enum ld_plugin_status
+register_claim_file(ld_plugin_claim_file_handler handler);
+
+static enum ld_plugin_status
+register_all_symbols_read(ld_plugin_all_symbols_read_handler handler);
+
+static enum ld_plugin_status
+register_cleanup(ld_plugin_cleanup_handler handler);
+
+static enum ld_plugin_status
+add_symbols(void *handle, int nsyms, const struct ld_plugin_symbol *syms);
+
+static enum ld_plugin_status
+get_symbols(const void *handle, int nsyms, struct ld_plugin_symbol *syms);
+
+static enum ld_plugin_status
+add_input_file(char *pathname);
+
+static enum ld_plugin_status
+message(int level, char *format, ...);
+
+};
+
+#endif // ENABLE_PLUGINS
+
+static Pluginobj* make_sized_plugin_object(Input_file* input_file,
+                                           off_t offset);
+
+// Plugin methods.
+
+// Load one plugin library.
+
+void
+Plugin::load()
+{
+#ifdef ENABLE_PLUGINS
+  std::string filename;
+  std::vector<std::string> args;
+
+  // Parse the filename and arguments, each separated by commas.
+  // FIXME:  Temporarily allowing semicolon as an argument separator
+  // so args can be passed through gcc's -Wl,... option, which
+  // breaks arguments at the commas.
+  const char* p = this->args_;
+  int n = strcspn(p, ",;");
+  filename.assign(p, n);
+  p += n;
+  while (*p == ',' || *p == ';')
+    {
+      ++p;
+      n = strcspn(p, ",;");
+      args.push_back(std::string(p, n));
+      p += n;
+    }
+
+  // Load the plugin library.
+  // FIXME: Look for the library in standard locations.
+  this->handle_ = dlopen(filename.c_str(), RTLD_NOW);
+  if (this->handle_ == NULL)
+    {
+      gold_error(_("%s: could not load plugin library"), filename.c_str());
+      return;
+    }
+
+  // Find the plugin's onload entry point.
+  ld_plugin_onload onload = reinterpret_cast<ld_plugin_onload>
+    (dlsym(this->handle_, "onload"));
+  if (onload == NULL)
+    {
+      gold_error(_("%s: could not find onload entry point"), filename.c_str());
+      return;
+    }
+
+  // Get the linker's version number.
+  const char* ver = get_version_string();
+  int major = 0;
+  int minor = 0;
+  sscanf(ver, "%d.%d", &major, &minor);
+
+  // Allocate and populate a transfer vector.
+  const int tv_fixed_size = 11;
+  int tv_size = args.size() + tv_fixed_size;
+  ld_plugin_tv *tv = new ld_plugin_tv[tv_size];
+
+  int i = 0;
+  tv[i].tv_tag = LDPT_API_VERSION;
+  tv[i].tv_u.tv_val = LD_PLUGIN_API_VERSION;
+
+  ++i;
+  tv[i].tv_tag = LDPT_GOLD_VERSION;
+  tv[i].tv_u.tv_val = major * 100 + minor;
+
+  ++i;
+  tv[i].tv_tag = LDPT_LINKER_OUTPUT;
+  if (parameters->options().relocatable())
+    tv[i].tv_u.tv_val = LDPO_REL;
+  else if (parameters->options().shared())
+    tv[i].tv_u.tv_val = LDPO_DYN;
+  else
+    tv[i].tv_u.tv_val = LDPO_EXEC;
+
+  for (unsigned int j = 0; j < args.size(); ++j)
+    {
+      ++i;
+      tv[i].tv_tag = LDPT_OPTION;
+      tv[i].tv_u.tv_string = args[j].c_str();
+    }
+
+  ++i;
+  tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
+  tv[i].tv_u.tv_register_claim_file = register_claim_file;
+
+  ++i;
+  tv[i].tv_tag = LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK;
+  tv[i].tv_u.tv_register_all_symbols_read = register_all_symbols_read;
+
+  ++i;
+  tv[i].tv_tag = LDPT_REGISTER_CLEANUP_HOOK;
+  tv[i].tv_u.tv_register_cleanup = register_cleanup;
+
+  ++i;
+  tv[i].tv_tag = LDPT_ADD_SYMBOLS;
+  tv[i].tv_u.tv_add_symbols = add_symbols;
+
+  ++i;
+  tv[i].tv_tag = LDPT_GET_SYMBOLS;
+  tv[i].tv_u.tv_get_symbols = get_symbols;
+
+  ++i;
+  tv[i].tv_tag = LDPT_ADD_INPUT_FILE;
+  tv[i].tv_u.tv_add_input_file = add_input_file;
+
+  ++i;
+  tv[i].tv_tag = LDPT_MESSAGE;
+  tv[i].tv_u.tv_message = message;
+
+  ++i;
+  tv[i].tv_tag = LDPT_NULL;
+  tv[i].tv_u.tv_val = 0;
+
+  gold_assert(i == tv_size - 1);
+
+  // Call the onload entry point.
+  (*onload)(tv);
+
+  delete tv;
+#endif // ENABLE_PLUGINS
+}
+
+// Call the plugin claim-file handler.
+
+inline bool
+Plugin::claim_file(struct ld_plugin_input_file *plugin_input_file)
+{
+  int claimed = 0;
+
+  if (this->claim_file_handler_ != NULL)
+    {
+      (*this->claim_file_handler_)(plugin_input_file, &claimed);
+      if (claimed)
+        return true;
+    }
+  return false;
+}
+
+// Call the all-symbols-read handler.
+
+inline void
+Plugin::all_symbols_read()
+{
+  if (this->all_symbols_read_handler_ != NULL)
+    (*this->all_symbols_read_handler_)();
+}
+
+// Call the cleanup handler.
+
+inline void
+Plugin::cleanup()
+{
+  if (this->cleanup_handler_ != NULL)
+    (*this->cleanup_handler_)();
+}
+
+// Plugin_manager methods.
+
+Plugin_manager::~Plugin_manager()
+{
+  for (Plugin_list::iterator p = this->plugins_.begin();
+       p != this->plugins_.end();
+       ++p)
+    delete *p;
+  this->plugins_.clear();
+  for (Object_list::iterator obj = this->objects_.begin();
+       obj != this->objects_.end();
+       ++obj)
+    delete *obj;
+  this->objects_.clear();
+}
+
+// Load all plugin libraries.
+
+void
+Plugin_manager::load_plugins()
+{
+  for (this->current_ = this->plugins_.begin();
+       this->current_ != this->plugins_.end();
+       ++this->current_)
+    (*this->current_)->load();
+}
+
+// Call the plugin claim-file handlers in turn to see if any claim the file.
+
+Pluginobj*
+Plugin_manager::claim_file(Input_file* input_file, off_t offset,
+                           off_t filesize)
+{
+  if (this->in_replacement_phase_)
+    return NULL;
+
+  unsigned int handle = this->objects_.size();
+  this->input_file_ = input_file;
+  this->plugin_input_file_.name = input_file->filename().c_str();
+  this->plugin_input_file_.fd = input_file->file().descriptor();
+  this->plugin_input_file_.offset = offset;
+  this->plugin_input_file_.filesize = filesize;
+  this->plugin_input_file_.handle = reinterpret_cast<void*>(handle);
+
+  for (this->current_ = this->plugins_.begin();
+       this->current_ != this->plugins_.end();
+       ++this->current_)
+    {
+      if ((*this->current_)->claim_file(&this->plugin_input_file_))
+        {
+          if (this->objects_.size() <= handle)
+            {
+              gold_error(_("%s: plugin claimed the file "
+                           "but did not provide any symbols"),
+                         this->plugin_input_file_.name);
+              return NULL;
+            }
+          return this->objects_[handle];
+        }
+    }
+
+  return NULL;
+}
+
+// Call the all-symbols-read handlers.
+
+void
+Plugin_manager::all_symbols_read(Workqueue* workqueue,
+                                 Input_objects* input_objects,
+	                         Symbol_table* symtab, Layout* layout,
+	                         Dirsearch* dirpath, Mapfile* mapfile,
+	                         Task_token** last_blocker)
+{
+  this->in_replacement_phase_ = true;
+  this->workqueue_ = workqueue;
+  this->input_objects_ = input_objects;
+  this->symtab_ = symtab;
+  this->layout_ = layout;
+  this->dirpath_ = dirpath;
+  this->mapfile_ = mapfile;
+  this->this_blocker_ = NULL;
+
+  for (this->current_ = this->plugins_.begin();
+       this->current_ != this->plugins_.end();
+       ++this->current_)
+    (*this->current_)->all_symbols_read();
+
+  *last_blocker = this->this_blocker_;
+}
+
+// Call the cleanup handlers.
+
+void
+Plugin_manager::cleanup()
+{
+  for (this->current_ = this->plugins_.begin();
+       this->current_ != this->plugins_.end();
+       ++this->current_)
+    (*this->current_)->cleanup();
+}
+
+// Make a new Pluginobj object.  This is called when the plugin calls
+// the add_symbols API.
+
+Pluginobj*
+Plugin_manager::make_plugin_object(unsigned int handle)
+{
+  // Make sure we aren't asked to make an object for the same handle twice.
+  if (this->objects_.size() != handle)
+    return NULL;
+
+  Pluginobj* obj = make_sized_plugin_object(this->input_file_,
+                                            this->plugin_input_file_.offset);
+  this->objects_.push_back(obj);
+  return obj;
+}
+
+// Add a new input file.
+
+ld_plugin_status
+Plugin_manager::add_input_file(char *pathname)
+{
+  Input_file_argument file(pathname, false, "", false, this->options_);
+  Input_argument* input_argument = new Input_argument(file);
+  Task_token* next_blocker = new Task_token(true);
+  next_blocker->add_blocker();
+  this->workqueue_->queue_soon(new Read_symbols(this->options_,
+                                                this->input_objects_,
+                                                this->symtab_,
+                                                this->layout_,
+                                                this->dirpath_,
+                                                this->mapfile_,
+                                                input_argument,
+                                                NULL,
+                                                this->this_blocker_,
+                                                next_blocker));
+  this->this_blocker_ = next_blocker;
+  return LDPS_OK;
+}
+
+// Class Pluginobj.
+
+Pluginobj::Pluginobj(const std::string& name, Input_file* input_file,
+                     off_t offset)
+  : Object(name, input_file, false, offset),
+    nsyms_(0), syms_(NULL), symbols_(), comdat_map_()
+{
+}
+
+// Get symbol resolution info.
+
+ld_plugin_status
+Pluginobj::get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const
+{
+  if (this->nsyms_ == 0)
+    return LDPS_NO_SYMS;
+  for (int i = 0; i < nsyms; i++)
+    {
+      ld_plugin_symbol* isym = &syms[i];
+      Symbol* lsym = this->symbols_[i];
+      ld_plugin_symbol_resolution res = LDPR_UNKNOWN;
+
+      if (lsym->is_undefined())
+        // The symbol remains undefined.
+        res = LDPR_UNDEF;
+      else if (isym->def == LDPK_UNDEF
+               || isym->def == LDPK_WEAKUNDEF
+               || isym->def == LDPK_COMMON)
+        {
+          // The original symbol was undefined or common.
+          if (lsym->source() != Symbol::FROM_OBJECT)
+            res = LDPR_RESOLVED_EXEC;
+          else if (lsym->object()->pluginobj() != NULL)
+            res = LDPR_RESOLVED_IR;
+          else if (lsym->object()->is_dynamic())
+            res = LDPR_RESOLVED_DYN;
+          else
+            res = LDPR_RESOLVED_EXEC;
+        }
+      else
+        {
+          // The original symbol was a definition.
+          if (lsym->source() != Symbol::FROM_OBJECT)
+            res = LDPR_PREEMPTED_REG;
+          else if (lsym->object() == static_cast<const Object*>(this))
+            res = (lsym->in_real_elf()
+                   ? LDPR_PREVAILING_DEF
+                   : LDPR_PREVAILING_DEF_IRONLY);
+          else
+            res = (lsym->object()->pluginobj() != NULL
+                   ? LDPR_PREEMPTED_IR
+                   : LDPR_PREEMPTED_REG);
+        }
+      isym->resolution = res;
+    }
+  return LDPS_OK;
+}
+
+// Return TRUE if the comdat group with key COMDAT_KEY from this object
+// should be kept.
+
+bool
+Pluginobj::include_comdat_group(std::string comdat_key, Layout* layout)
+{
+  std::pair<Comdat_map::iterator, bool> ins =
+    this->comdat_map_.insert(std::make_pair(comdat_key, false));
+
+  // If this is the first time we've seen this comdat key, ask the
+  // layout object whether it should be included.
+  if (ins.second)
+    ins.first->second = layout->add_comdat(NULL, 1, comdat_key, true);
+
+  return ins.first->second;
+}
+
+// Class Sized_pluginobj.
+
+template<int size, bool big_endian>
+Sized_pluginobj<size, big_endian>::Sized_pluginobj(
+    const std::string& name,
+    Input_file* input_file,
+    off_t offset)
+  : Pluginobj(name, input_file, offset)
+{
+}
+
+// Read the symbols.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+void
+Sized_pluginobj<size, big_endian>::do_read_symbols(Read_symbols_data*)
+{
+  gold_unreachable();
+}
+
+// Lay out the input sections.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+void
+Sized_pluginobj<size, big_endian>::do_layout(Symbol_table*, Layout*,
+                                             Read_symbols_data*)
+{
+  gold_unreachable();
+}
+
+// Add the symbols to the symbol table.
+
+template<int size, bool big_endian>
+void
+Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table*,
+                                                  Read_symbols_data*)
+{
+  gold_unreachable();
+}
+
+template<int size, bool big_endian>
+void
+Sized_pluginobj<size, big_endian>::do_add_symbols(Symbol_table* symtab,
+                                                  Layout* layout)
+{
+  const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+  unsigned char symbuf[sym_size];
+  elfcpp::Sym<size, big_endian> sym(symbuf);
+  elfcpp::Sym_write<size, big_endian> osym(symbuf);
+
+  typedef typename elfcpp::Elf_types<size>::Elf_WXword Elf_size_type;
+
+  this->symbols_.resize(this->nsyms_);
+
+  for (int i = 0; i < this->nsyms_; ++i)
+    {
+      const struct ld_plugin_symbol *isym = &this->syms_[i];
+      const char* name = isym->name;
+      const char* ver = isym->version;
+      elfcpp::Elf_Half shndx;
+      elfcpp::STB bind;
+      elfcpp::STV vis;
+
+      if (name != NULL && name[0] == '\0')
+        name = NULL;
+      if (ver != NULL && ver[0] == '\0')
+        ver = NULL;
+
+      switch (isym->def)
+        {
+        case LDPK_WEAKDEF:
+        case LDPK_WEAKUNDEF:
+          bind = elfcpp::STB_WEAK;
+          break;
+        case LDPK_DEF:
+        case LDPK_UNDEF:
+        case LDPK_COMMON:
+        default:
+          bind = elfcpp::STB_GLOBAL;
+          break;
+        }
+
+      switch (isym->def)
+        {
+        case LDPK_DEF:
+        case LDPK_WEAKDEF:
+          shndx = elfcpp::SHN_ABS;
+          break;
+        case LDPK_COMMON:
+          shndx = elfcpp::SHN_COMMON;
+          break;
+        case LDPK_UNDEF:
+        case LDPK_WEAKUNDEF:
+        default:
+          shndx = elfcpp::SHN_UNDEF;
+          break;
+        }
+
+      switch (isym->visibility)
+        {
+        case LDPV_PROTECTED:
+          vis = elfcpp::STV_DEFAULT;
+          break;
+        case LDPV_INTERNAL:
+          vis = elfcpp::STV_DEFAULT;
+          break;
+        case LDPV_HIDDEN:
+          vis = elfcpp::STV_DEFAULT;
+          break;
+        case LDPV_DEFAULT:
+        default:
+          vis = elfcpp::STV_DEFAULT;
+          break;
+        }
+
+      if (isym->comdat_key != NULL
+          && isym->comdat_key[0] != '\0'
+          && !this->include_comdat_group(isym->comdat_key, layout))
+        shndx = elfcpp::SHN_UNDEF;
+
+      osym.put_st_name(0);
+      osym.put_st_value(0);
+      osym.put_st_size(static_cast<Elf_size_type>(isym->size));
+      osym.put_st_info(bind, elfcpp::STT_NOTYPE);
+      osym.put_st_other(vis, 0);
+      osym.put_st_shndx(shndx);
+
+      this->symbols_[i] =
+        symtab->add_from_pluginobj<size, big_endian>(this, name, ver, &sym);
+    }
+}
+
+// Get the size of a section.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+uint64_t
+Sized_pluginobj<size, big_endian>::do_section_size(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Get the name of a section.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+std::string
+Sized_pluginobj<size, big_endian>::do_section_name(unsigned int)
+{
+  gold_unreachable();
+  return std::string();
+}
+
+// Return a view of the contents of a section.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+Object::Location
+Sized_pluginobj<size, big_endian>::do_section_contents(unsigned int)
+{
+  Location loc(0, 0);
+
+  gold_unreachable();
+  return loc;
+}
+
+// Return section flags.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+uint64_t
+Sized_pluginobj<size, big_endian>::do_section_flags(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return section address.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+uint64_t
+Sized_pluginobj<size, big_endian>::do_section_address(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return section type.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+unsigned int
+Sized_pluginobj<size, big_endian>::do_section_type(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return the section link field.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+unsigned int
+Sized_pluginobj<size, big_endian>::do_section_link(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return the section link field.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+unsigned int
+Sized_pluginobj<size, big_endian>::do_section_info(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return the section alignment.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+uint64_t
+Sized_pluginobj<size, big_endian>::do_section_addralign(unsigned int)
+{
+  gold_unreachable();
+  return 0;
+}
+
+// Return the Xindex structure to use.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+Xindex*
+Sized_pluginobj<size, big_endian>::do_initialize_xindex()
+{
+  gold_unreachable();
+  return NULL;
+}
+
+// Get symbol counts.  Not used for plugin objects.
+
+template<int size, bool big_endian>
+void
+Sized_pluginobj<size, big_endian>::do_get_global_symbol_counts(const Symbol_table*,
+                                                   size_t*, size_t*) const
+{
+  gold_unreachable();
+}
+
+// Class Add_plugin_symbols.
+
+Add_plugin_symbols::~Add_plugin_symbols()
+{
+  if (this->this_blocker_ != NULL)
+    delete this->this_blocker_;
+  // next_blocker_ is deleted by the task associated with the next
+  // input file.
+}
+
+// We are blocked by this_blocker_.  We block next_blocker_.  We also
+// lock the file.
+
+Task_token*
+Add_plugin_symbols::is_runnable()
+{
+  if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+    return this->this_blocker_;
+  if (this->obj_->is_locked())
+    return this->obj_->token();
+  return NULL;
+}
+
+void
+Add_plugin_symbols::locks(Task_locker* tl)
+{
+  tl->add(this, this->next_blocker_);
+  tl->add(this, this->obj_->token());
+}
+
+// Add the symbols in the object to the symbol table.
+
+void
+Add_plugin_symbols::run(Workqueue*)
+{
+  this->obj_->add_symbols(this->symtab_, this->layout_);
+}
+
+// Class Plugin_cleanup.  This task calls the plugin cleanup hooks once all
+// replacement files have been added.
+
+class Plugin_cleanup : public Task
+{
+ public:
+  Plugin_cleanup(Task_token* this_blocker, Task_token* next_blocker)
+    : this_blocker_(this_blocker), next_blocker_(next_blocker)
+  { }
+
+  ~Plugin_cleanup()
+  {
+    if (this->this_blocker_ != NULL)
+      delete this->this_blocker_;
+  }
+
+  Task_token*
+  is_runnable()
+  {
+    if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+      return this->this_blocker_;
+    return NULL;
+  }
+
+  void
+  locks(Task_locker* tl)
+  { tl->add(this, this->next_blocker_); }
+
+  void
+  run(Workqueue*)
+  { parameters->options().plugins()->cleanup(); }
+
+  std::string
+  get_name() const
+  { return "Plugin_cleanup"; }
+
+ private:
+  Task_token* this_blocker_;
+  Task_token* next_blocker_;
+};
+
+// Class Plugin_hook.
+
+Plugin_hook::~Plugin_hook()
+{
+}
+
+// Return whether a Plugin_hook task is runnable.
+
+Task_token*
+Plugin_hook::is_runnable()
+{
+  if (this->this_blocker_ != NULL && this->this_blocker_->is_blocked())
+    return this->this_blocker_;
+  return NULL;
+}
+
+// Return a Task_locker for a Plugin_hook task.  We don't need any
+// locks here.
+
+void
+Plugin_hook::locks(Task_locker*)
+{
+}
+
+// Run a Plugin_hook task.
+
+void
+Plugin_hook::run(Workqueue* workqueue)
+{
+  this->do_plugin_hook(workqueue);
+}
+
+// Run the "all symbols read" plugin hook.
+
+void
+Plugin_hook::do_plugin_hook(Workqueue* workqueue)
+{
+  gold_assert(this->options_.has_plugins());
+  this->options_.plugins()->all_symbols_read(workqueue,
+                                             this->input_objects_,
+                                             this->symtab_,
+                                             this->layout_,
+                                             this->dirpath_,
+                                             this->mapfile_,
+                                             &this->this_blocker_);
+  workqueue->queue_soon(new Plugin_cleanup(this->this_blocker_,
+					   this->next_blocker_));
+}
+
+// The C interface routines called by the plugins.
+
+#ifdef ENABLE_PLUGINS
+
+// Register a claim-file handler.
+
+static enum ld_plugin_status
+register_claim_file(ld_plugin_claim_file_handler handler)
+{
+  gold_assert(parameters->options().has_plugins());
+  parameters->options().plugins()->set_claim_file_handler(handler);
+  return LDPS_OK;
+}
+
+// Register an all-symbols-read handler.
+
+static enum ld_plugin_status
+register_all_symbols_read(ld_plugin_all_symbols_read_handler handler)
+{
+  gold_assert(parameters->options().has_plugins());
+  parameters->options().plugins()->set_all_symbols_read_handler(handler);
+  return LDPS_OK;
+}
+
+// Register a cleanup handler.
+
+static enum ld_plugin_status
+register_cleanup(ld_plugin_cleanup_handler handler)
+{
+  gold_assert(parameters->options().has_plugins());
+  parameters->options().plugins()->set_cleanup_handler(handler);
+  return LDPS_OK;
+}
+
+// Add symbols from a plugin-claimed input file.
+
+static enum ld_plugin_status
+add_symbols(void* handle, int nsyms, const ld_plugin_symbol *syms)
+{
+  gold_assert(parameters->options().has_plugins());
+  Pluginobj* obj = parameters->options().plugins()->make_plugin_object(
+      static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
+  if (obj == NULL)
+    return LDPS_ERR;
+  obj->store_incoming_symbols(nsyms, syms);
+  return LDPS_OK;
+}
+
+// Get the symbol resolution info for a plugin-claimed input file.
+
+static enum ld_plugin_status
+get_symbols(const void * handle, int nsyms, ld_plugin_symbol* syms)
+{
+  gold_assert(parameters->options().has_plugins());
+  Pluginobj* obj = parameters->options().plugins()->object(
+      static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle)));
+  if (obj == NULL)
+    return LDPS_ERR;
+  return obj->get_symbol_resolution_info(nsyms, syms);
+}
+
+// Add a new (real) input file generated by a plugin.
+
+static enum ld_plugin_status
+add_input_file(char *pathname)
+{
+  gold_assert(parameters->options().has_plugins());
+  return parameters->options().plugins()->add_input_file(pathname);
+}
+
+// Issue a diagnostic message from a plugin.
+
+static enum ld_plugin_status
+message(int level, char * format, ...)
+{
+  va_list args;
+  va_start(args, format);
+
+  switch (level)
+    {
+    case LDPL_INFO:
+      parameters->errors()->info(format, args);
+      break;
+    case LDPL_WARNING:
+      parameters->errors()->warning(format, args);
+      break;
+    case LDPL_ERROR:
+    default:
+      parameters->errors()->error(format, args);
+      break;
+    case LDPL_FATAL:
+      parameters->errors()->fatal(format, args);
+      break;
+    }
+
+  va_end(args);
+  return LDPS_OK;
+}
+
+#endif // ENABLE_PLUGINS
+
+// Allocate a Pluginobj object of the appropriate size and endianness.
+
+static Pluginobj*
+make_sized_plugin_object(Input_file* input_file, off_t offset)
+{
+  Target* target;
+  Pluginobj* obj = NULL;
+
+  if (parameters->target_valid())
+    target = const_cast<Target*>(&parameters->target());
+  else
+    target = const_cast<Target*>(&parameters->default_target());
+
+  if (target->get_size() == 32)
+    {
+      if (target->is_big_endian())
+#ifdef HAVE_TARGET_32_BIG
+        obj = new Sized_pluginobj<32, true>(input_file->filename(),
+                                            input_file, offset);
+#else
+        gold_error(_("%s: not configured to support "
+		     "32-bit big-endian object"),
+		   input_file->filename().c_str());
+#endif
+      else
+#ifdef HAVE_TARGET_32_LITTLE
+        obj = new Sized_pluginobj<32, false>(input_file->filename(),
+                                             input_file, offset);
+#else
+        gold_error(_("%s: not configured to support "
+		     "32-bit little-endian object"),
+		   input_file->filename().c_str());
+#endif
+    }
+  else if (target->get_size() == 64)
+    {
+      if (target->is_big_endian())
+#ifdef HAVE_TARGET_64_BIG
+        obj = new Sized_pluginobj<64, true>(input_file->filename(),
+                                            input_file, offset);
+#else
+        gold_error(_("%s: not configured to support "
+		     "64-bit big-endian object"),
+		   input_file->filename().c_str());
+#endif
+      else
+#ifdef HAVE_TARGET_64_LITTLE
+        obj = new Sized_pluginobj<64, false>(input_file->filename(),
+                                             input_file, offset);
+#else
+        gold_error(_("%s: not configured to support "
+		     "64-bit little-endian object"),
+		   input_file->filename().c_str());
+#endif
+    }
+
+  gold_assert(obj != NULL);
+  obj->set_target(target);
+  return obj;
+}
+
+} // End namespace gold.
diff --git a/gold/plugin.h b/gold/plugin.h
new file mode 100644
index 0000000..3f573ce
--- /dev/null
+++ b/gold/plugin.h
@@ -0,0 +1,457 @@
+// plugin.h -- plugin manager for gold      -*- C++ -*-
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#ifndef GOLD_PLUGIN_H
+#define GOLD_PLUGIN_H
+
+#include <list>
+#include <string>
+
+#include "object.h"
+#include "plugin-api.h"
+#include "workqueue.h"
+
+namespace gold
+{
+
+class General_options;
+class Input_file;
+class Input_objects;
+class Symbol_table;
+class Layout;
+class Dirsearch;
+class Mapfile;
+class Task_token;
+class Pluginobj;
+
+// This class represents a single plugin library.
+
+class Plugin
+{
+ public:
+  Plugin(const char* args)
+    : handle_(NULL),
+      args_(args),
+      claim_file_handler_(NULL),
+      all_symbols_read_handler_(NULL),
+      cleanup_handler_(NULL)      
+  { }
+
+  ~Plugin()
+  { }
+
+  // Load the library and call its entry point.
+  void
+  load();
+
+  // Call the claim-file handler.
+  bool
+  claim_file(struct ld_plugin_input_file *plugin_input_file);
+
+  // Call the all-symbols-read handler.
+  void
+  all_symbols_read();
+
+  // Call the cleanup handler.
+  void
+  cleanup();
+
+  // Register a claim-file handler.
+  void
+  set_claim_file_handler(ld_plugin_claim_file_handler handler)
+  { this->claim_file_handler_ = handler; }
+
+  // Register an all-symbols-read handler.
+  void
+  set_all_symbols_read_handler(ld_plugin_all_symbols_read_handler handler)
+  { this->all_symbols_read_handler_ = handler; }
+
+  // Register a claim-file handler.
+  void
+  set_cleanup_handler(ld_plugin_cleanup_handler handler)
+  { this->cleanup_handler_ = handler; }
+
+ private:
+  Plugin(const Plugin&);
+  Plugin& operator=(const Plugin&);
+
+  // The shared library handle returned by dlopen.
+  void* handle_;
+  // The argument string given to --plugin.
+  const char* args_;
+  // The plugin's event handlers.
+  ld_plugin_claim_file_handler claim_file_handler_;
+  ld_plugin_all_symbols_read_handler all_symbols_read_handler_;
+  ld_plugin_cleanup_handler cleanup_handler_;
+};
+
+// A manager class for plugins.
+
+class Plugin_manager
+{
+ public:
+  Plugin_manager(const General_options& options)
+    : plugins_(), in_replacement_phase_(false), options_(options),
+      workqueue_(NULL), input_objects_(NULL), symtab_(NULL), layout_(NULL),
+      dirpath_(NULL), mapfile_(NULL), this_blocker_(NULL)
+  { this->current_ = plugins_.end(); }
+
+  ~Plugin_manager();
+
+  // Add a plugin library.
+  void
+  add_plugin(const char* args)
+  { this->plugins_.push_back(new Plugin(args)); }
+
+  // Load all plugin libraries.
+  void
+  load_plugins();
+
+  // Call the plugin claim-file handlers in turn to see if any claim the file.
+  Pluginobj*
+  claim_file(Input_file *input_file, off_t offset, off_t filesize);
+
+  // Call the all-symbols-read handlers.
+  void
+  all_symbols_read(Workqueue* workqueue, Input_objects* input_objects,
+                   Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
+                   Mapfile* mapfile, Task_token** last_blocker);
+
+  // Call the cleanup handlers.
+  void
+  cleanup();
+
+  // Register a claim-file handler.
+  void
+  set_claim_file_handler(ld_plugin_claim_file_handler handler)
+  {
+    gold_assert(this->current_ != plugins_.end());
+    (*this->current_)->set_claim_file_handler(handler);
+  }
+
+  // Register an all-symbols-read handler.
+  void
+  set_all_symbols_read_handler(ld_plugin_all_symbols_read_handler handler)
+  {
+    gold_assert(this->current_ != plugins_.end());
+    (*this->current_)->set_all_symbols_read_handler(handler);
+  }
+
+  // Register a claim-file handler.
+  void
+  set_cleanup_handler(ld_plugin_cleanup_handler handler)
+  {
+    gold_assert(this->current_ != plugins_.end());
+    (*this->current_)->set_cleanup_handler(handler);
+  }
+
+  // Make a new Pluginobj object.  This is called when the plugin calls
+  // the add_symbols API.
+  Pluginobj*
+  make_plugin_object(unsigned int handle);
+
+  // Return the Pluginobj associated with the given HANDLE.
+  Pluginobj*
+  object(unsigned int handle) const
+  {
+    if (handle >= this->objects_.size())
+      return NULL;
+    return this->objects_[handle];
+  }
+
+  // Add a new input file.
+  ld_plugin_status
+  add_input_file(char *pathname);
+
+  // Return TRUE if we are in the replacement phase.
+  bool
+  in_replacement_phase() const
+  { return this->in_replacement_phase_; }
+
+ private:
+  Plugin_manager(const Plugin_manager&);
+  Plugin_manager& operator=(const Plugin_manager&);
+
+  typedef std::list<Plugin*> Plugin_list;
+  typedef std::vector<Pluginobj*> Object_list;
+
+  // The list of plugin libraries.
+  Plugin_list plugins_;
+  // A pointer to the current plugin.  Used while loading plugins.
+  Plugin_list::iterator current_;
+
+  // The list of plugin objects.  The index of an item in this list
+  // serves as the "handle" that we pass to the plugins.
+  Object_list objects_;
+
+  // The file currently up for claim by the plugins.
+  Input_file* input_file_;
+  struct ld_plugin_input_file plugin_input_file_;
+
+  // TRUE after the all symbols read event; indicates that we are
+  // processing replacement files whose symbols should replace the
+  // placeholder symbols from the Pluginobj objects.
+  bool in_replacement_phase_;
+
+  const General_options& options_;
+  Workqueue* workqueue_;
+  Input_objects* input_objects_;
+  Symbol_table* symtab_;
+  Layout* layout_;
+  Dirsearch* dirpath_;
+  Mapfile* mapfile_;
+  Task_token* this_blocker_;
+};
+
+
+// An object file claimed by a plugin.  This is an abstract base class.
+// The implementation is the template class Sized_pluginobj.
+
+class Pluginobj : public Object
+{
+ public:
+
+  typedef std::vector<Symbol*> Symbols;
+
+  Pluginobj(const std::string& name, Input_file* input_file, off_t offset);
+
+  // Fill in the symbol resolution status for the given plugin symbols.
+  ld_plugin_status
+  get_symbol_resolution_info(int nsyms, ld_plugin_symbol* syms) const;
+
+  // Add symbol information to the global symbol table.
+  void
+  add_symbols(Symbol_table* symtab, Layout* layout)
+  { this->do_add_symbols(symtab, layout); }
+
+  // Store the incoming symbols from the plugin for later processing.
+  void
+  store_incoming_symbols(int nsyms, const struct ld_plugin_symbol* syms)
+  {
+    this->nsyms_ = nsyms;
+    this->syms_ = syms;
+  }
+
+  // Return TRUE if the comdat group with key COMDAT_KEY from this object
+  // should be kept.
+  bool
+  include_comdat_group(std::string comdat_key, Layout* layout);
+
+ protected:
+  // Return TRUE if this is an object claimed by a plugin.
+  virtual Pluginobj*
+  do_pluginobj()
+  { return this; }
+
+  // Add symbol information to the global symbol table--implemented by
+  // child class.
+  virtual void
+  do_add_symbols(Symbol_table*, Layout*) = 0;
+
+  // The number of symbols provided by the plugin.
+  int nsyms_;
+  
+  // The symbols provided by the plugin.
+  const struct ld_plugin_symbol* syms_;
+
+  // The entries in the symbol table for the external symbols.
+  Symbols symbols_;
+
+ private:
+  // Map a comdat key symbol to a boolean indicating whether the comdat
+  // group in this object with that key should be kept.
+  typedef Unordered_map<std::string, bool> Comdat_map;
+  Comdat_map comdat_map_;
+};
+
+// A plugin object, size-specific version.
+
+template<int size, bool big_endian>
+class Sized_pluginobj : public Pluginobj
+{
+ public:
+  Sized_pluginobj(const std::string& name, Input_file* input_file,
+                  off_t offset);
+
+  // Read the symbols.
+  void
+  do_read_symbols(Read_symbols_data*);
+
+  // Lay out the input sections.
+  void
+  do_layout(Symbol_table*, Layout*, Read_symbols_data*);
+
+  // Add the symbols to the symbol table.
+  void
+  do_add_symbols(Symbol_table*, Read_symbols_data*);
+
+  void
+  do_add_symbols(Symbol_table*, Layout*);
+
+  // Get the size of a section.
+  uint64_t
+  do_section_size(unsigned int shndx);
+
+  // Get the name of a section.
+  std::string
+  do_section_name(unsigned int shndx);
+
+  // Return a view of the contents of a section.
+  Object::Location
+  do_section_contents(unsigned int shndx);
+
+  // Return section flags.
+  uint64_t
+  do_section_flags(unsigned int shndx);
+
+  // Return section address.
+  uint64_t
+  do_section_address(unsigned int shndx);
+
+  // Return section type.
+  unsigned int
+  do_section_type(unsigned int shndx);
+
+  // Return the section link field.
+  unsigned int
+  do_section_link(unsigned int shndx);
+
+  // Return the section link field.
+  unsigned int
+  do_section_info(unsigned int shndx);
+
+  // Return the section alignment.
+  uint64_t
+  do_section_addralign(unsigned int shndx);
+
+  // Return the Xindex structure to use.
+  Xindex*
+  do_initialize_xindex();
+
+  // Get symbol counts.
+  void
+  do_get_global_symbol_counts(const Symbol_table*, size_t*, size_t*) const;
+
+  // Add placeholder symbols from a claimed file.
+  ld_plugin_status
+  add_symbols_from_plugin(int nsyms, const ld_plugin_symbol* syms);
+
+ protected:
+
+ private:
+};
+
+// This Task handles adding the symbols to the symbol table.  These
+// tasks must be run in the same order as the arguments appear on the
+// command line.
+
+class Add_plugin_symbols : public Task
+{
+ public:
+  // THIS_BLOCKER is used to prevent this task from running before the
+  // one for the previous input file.  NEXT_BLOCKER is used to prevent
+  // the next task from running.
+  Add_plugin_symbols(Symbol_table* symtab,
+	             Layout* layout,
+	             Pluginobj* obj,
+	             Task_token* this_blocker,
+	             Task_token* next_blocker)
+    : symtab_(symtab), layout_(layout), obj_(obj),
+      this_blocker_(this_blocker), next_blocker_(next_blocker)
+  { }
+
+  ~Add_plugin_symbols();
+
+  // The standard Task methods.
+
+  Task_token*
+  is_runnable();
+
+  void
+  locks(Task_locker*);
+
+  void
+  run(Workqueue*);
+
+  std::string
+  get_name() const
+  { return "Add_plugin_symbols " + this->obj_->name(); }
+
+private:
+  Symbol_table* symtab_;
+  Layout* layout_;
+  Pluginobj* obj_;
+  Task_token* this_blocker_;
+  Task_token* next_blocker_;
+};
+
+// This Task handles handles the "all symbols read" event hook.
+// The plugin may add additional input files at this time, which must
+// be queued for reading.
+
+class Plugin_hook : public Task
+{
+ public:
+  Plugin_hook(const General_options& options, Input_objects* input_objects,
+	      Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
+	      Mapfile* mapfile, Task_token* this_blocker,
+	      Task_token* next_blocker)
+    : options_(options), input_objects_(input_objects), symtab_(symtab),
+      layout_(layout), dirpath_(dirpath), mapfile_(mapfile),
+      this_blocker_(this_blocker), next_blocker_(next_blocker)
+  { }
+
+  ~Plugin_hook();
+
+  // The standard Task methods.
+
+  Task_token*
+  is_runnable();
+
+  void
+  locks(Task_locker*);
+
+  void
+  run(Workqueue*);
+
+  std::string
+  get_name() const
+  { return "Plugin_hook"; }
+
+ private:
+  // Call the plugin hook.
+  void
+  do_plugin_hook(Workqueue*);
+
+  const General_options& options_;
+  Input_objects* input_objects_;
+  Symbol_table* symtab_;
+  Layout* layout_;
+  Dirsearch* dirpath_;
+  Mapfile* mapfile_;
+  Task_token* this_blocker_;
+  Task_token* next_blocker_;
+};
+
+} // End namespace gold.
+
+#endif // !defined(GOLD_PLUGIN_H)
diff --git a/gold/powerpc.cc b/gold/powerpc.cc
index 421cfdb..05ce4fc 100644
--- a/gold/powerpc.cc
+++ b/gold/powerpc.cc
@@ -129,7 +129,7 @@ class Target_powerpc : public Sized_target<size, big_endian>
 
   // Return whether SYM is defined by the ABI.
   bool
-  do_is_defined_by_abi(Symbol* sym) const
+  do_is_defined_by_abi(const Symbol* sym) const
   {
     return strcmp(sym->name(), "___tls_get_addr") == 0;
   }
diff --git a/gold/readsyms.cc b/gold/readsyms.cc
index 05c80f8..ac646d9 100644
--- a/gold/readsyms.cc
+++ b/gold/readsyms.cc
@@ -32,6 +32,7 @@
 #include "archive.h"
 #include "script.h"
 #include "readsyms.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -159,6 +160,53 @@ Read_symbols::do_read_symbols(Workqueue* workqueue)
   const unsigned char* ehdr = input_file->file().get_view(0, 0, read_size,
 							  true, false);
 
+  if (read_size >= Archive::sarmag)
+    {
+      bool is_thin_archive
+          = memcmp(ehdr, Archive::armagt, Archive::sarmag) == 0;
+      if (is_thin_archive 
+          || memcmp(ehdr, Archive::armag, Archive::sarmag) == 0)
+	{
+	  // This is an archive.
+	  Archive* arch = new Archive(this->input_argument_->file().name(),
+				      input_file, is_thin_archive,
+				      this->dirpath_, this);
+	  arch->setup(this->input_objects_);
+	  
+	  // Unlock the archive so it can be used in the next task.
+	  arch->unlock(this);
+
+	  workqueue->queue_next(new Add_archive_symbols(this->symtab_,
+							this->layout_,
+							this->input_objects_,
+							this->mapfile_,
+							arch,
+							this->input_group_,
+							this->this_blocker_,
+							this->next_blocker_));
+	  return true;
+	}
+    }
+
+  if (parameters->options().has_plugins())
+    {
+      Pluginobj* obj = parameters->options().plugins()->claim_file(input_file,
+                                                                   0, filesize);
+      if (obj != NULL)
+        {
+          // The input file was claimed by a plugin, and its symbols
+          // have been provided by the plugin.
+	  input_file->file().claim_for_plugin();
+	  input_file->file().unlock(this);
+          workqueue->queue_next(new Add_plugin_symbols(this->symtab_,
+                                                       this->layout_,
+                                                       obj,
+                                                       this->this_blocker_,
+                                                       this->next_blocker_));
+          return true;
+        }
+    }
+
   if (read_size >= 4)
     {
       static unsigned char elfmagic[4] =
@@ -201,34 +249,6 @@ Read_symbols::do_read_symbols(Workqueue* workqueue)
 	}
     }
 
-  if (read_size >= Archive::sarmag)
-    {
-      bool is_thin_archive
-          = memcmp(ehdr, Archive::armagt, Archive::sarmag) == 0;
-      if (is_thin_archive 
-          || memcmp(ehdr, Archive::armag, Archive::sarmag) == 0)
-	{
-	  // This is an archive.
-	  Archive* arch = new Archive(this->input_argument_->file().name(),
-				      input_file, is_thin_archive,
-				      this->dirpath_, this);
-	  arch->setup(this->input_objects_);
-	  
-	  // Unlock the archive so it can be used in the next task.
-	  arch->unlock(this);
-
-	  workqueue->queue_next(new Add_archive_symbols(this->symtab_,
-							this->layout_,
-							this->input_objects_,
-							this->mapfile_,
-							arch,
-							this->input_group_,
-							this->this_blocker_,
-							this->next_blocker_));
-	  return true;
-	}
-    }
-
   // Queue up a task to try to parse this file as a script.  We use a
   // separate task so that the script will be read in order with other
   // objects named on the command line.  Also so that we don't try to
diff --git a/gold/reloc.cc b/gold/reloc.cc
index daa0ea8..481617d 100644
--- a/gold/reloc.cc
+++ b/gold/reloc.cc
@@ -586,8 +586,8 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
       // In the normal case, this input section is simply mapped to
       // the output section at offset OUTPUT_OFFSET.
 
-      // However, if OUTPUT_OFFSET == -1U, then input data is handled
-      // specially--e.g., a .eh_frame section.  The relocation
+      // However, if OUTPUT_OFFSET == INVALID_ADDRESS, then input data is
+      // handled specially--e.g., a .eh_frame section.  The relocation
       // routines need to check for each reloc where it should be
       // applied.  For this case, we need an input/output view for the
       // entire contents of the section in the output file.  We don't
@@ -619,7 +619,7 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
 
       off_t view_start;
       section_size_type view_size;
-      if (output_offset != -1U)
+      if (output_offset != invalid_address)
 	{
 	  view_start = output_section_offset + output_offset;
 	  view_size = convert_to_section_size_type(shdr.get_sh_size());
@@ -633,7 +633,7 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
       if (view_size == 0)
 	continue;
 
-      gold_assert(output_offset == -1U
+      gold_assert(output_offset == invalid_address
 		  || output_offset + view_size <= output_section_size);
 
       unsigned char* view;
@@ -641,7 +641,7 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
 	{
 	  unsigned char* buffer = os->postprocessing_buffer();
 	  view = buffer + view_start;
-	  if (output_offset != -1U)
+	  if (output_offset != invalid_address)
 	    {
 	      off_t sh_offset = shdr.get_sh_offset();
 	      if (!rm.empty() && rm.back().file_offset > sh_offset)
@@ -652,7 +652,7 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
 	}
       else
 	{
-	  if (output_offset == -1U)
+	  if (output_offset == invalid_address)
 	    view = of->get_input_output_view(view_start, view_size);
 	  else
 	    {
@@ -667,11 +667,11 @@ Sized_relobj<size, big_endian>::write_sections(const unsigned char* pshdrs,
 
       pvs->view = view;
       pvs->address = os->address();
-      if (output_offset != -1U)
+      if (output_offset != invalid_address)
 	pvs->address += output_offset;
       pvs->offset = view_start;
       pvs->view_size = view_size;
-      pvs->is_input_output_view = output_offset == -1U;
+      pvs->is_input_output_view = output_offset == invalid_address;
       pvs->is_postprocessing_view = os->requires_postprocessing();
     }
 
@@ -772,7 +772,7 @@ Sized_relobj<size, big_endian>::relocate_sections(
 	  continue;
 	}
 
-      gold_assert(output_offset != -1U
+      gold_assert(output_offset != invalid_address
 		  || this->relocs_must_follow_section_writes());
 
       relinfo.reloc_shndx = i;
@@ -784,7 +784,7 @@ Sized_relobj<size, big_endian>::relocate_sections(
 				   prelocs,
 				   reloc_count,
 				   os,
-				   output_offset == -1U,
+				   output_offset == invalid_address,
 				   (*pviews)[index].view,
 				   (*pviews)[index].address,
 				   (*pviews)[index].view_size);
diff --git a/gold/resolve.cc b/gold/resolve.cc
index 0ad990c..17544f8 100644
--- a/gold/resolve.cc
+++ b/gold/resolve.cc
@@ -26,6 +26,7 @@
 #include "target.h"
 #include "object.h"
 #include "symtab.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -240,6 +241,24 @@ Symbol_table::resolve(Sized_symbol<size>* to,
       to->set_in_dyn();
     }
 
+  // Record if we've seen this symbol in a real ELF object (i.e., the
+  // symbol is referenced from outside the world known to the plugin).
+  if (object->pluginobj() == NULL)
+    to->set_in_real_elf();
+
+  // If we're processing replacement files, allow new symbols to override
+  // the placeholders from the plugin objects.
+  if (to->source() == Symbol::FROM_OBJECT)
+    {
+      Pluginobj* obj = to->object()->pluginobj();
+      if (obj != NULL
+          && parameters->options().plugins()->in_replacement_phase())
+        {
+          this->override(to, sym, st_shndx, is_ordinary, object, version);
+          return;
+        }
+    }
+
   unsigned int frombits = symbol_to_bits(sym.get_st_bind(),
                                          object->is_dynamic(),
 					 st_shndx, is_ordinary,
diff --git a/gold/sparc.cc b/gold/sparc.cc
index 7da59dd..cca78b7 100644
--- a/gold/sparc.cc
+++ b/gold/sparc.cc
@@ -130,7 +130,7 @@ class Target_sparc : public Sized_target<size, big_endian>
 			   section_size_type reloc_view_size);
   // Return whether SYM is defined by the ABI.
   bool
-  do_is_defined_by_abi(Symbol* sym) const
+  do_is_defined_by_abi(const Symbol* sym) const
   {
     // XXX Really need to support this better...
     if (sym->type() == elfcpp::STT_SPARC_REGISTER)
diff --git a/gold/symtab.cc b/gold/symtab.cc
index 393d71a..c2de3bc 100644
--- a/gold/symtab.cc
+++ b/gold/symtab.cc
@@ -37,6 +37,7 @@
 #include "target.h"
 #include "workqueue.h"
 #include "symtab.h"
+#include "plugin.h"
 
 namespace gold
 {
@@ -73,6 +74,7 @@ Symbol::init_fields(const char* name, const char* version,
   this->is_copied_from_dynobj_ = false;
   this->is_forced_local_ = false;
   this->is_ordinary_shndx_ = false;
+  this->in_real_elf_ = false;
 }
 
 // Return the demangled version of the symbol's name, but only
@@ -117,6 +119,7 @@ Symbol::init_base_object(const char* name, const char* version, Object* object,
   this->source_ = FROM_OBJECT;
   this->in_reg_ = !object->is_dynamic();
   this->in_dyn_ = object->is_dynamic();
+  this->in_real_elf_ = object->pluginobj() == NULL;
 }
 
 // Initialize the fields in the base class Symbol for a symbol defined
@@ -133,6 +136,7 @@ Symbol::init_base_output_data(const char* name, const char* version,
   this->u_.in_output_data.offset_is_from_end = offset_is_from_end;
   this->source_ = IN_OUTPUT_DATA;
   this->in_reg_ = true;
+  this->in_real_elf_ = true;
 }
 
 // Initialize the fields in the base class Symbol for a symbol defined
@@ -150,6 +154,7 @@ Symbol::init_base_output_segment(const char* name, const char* version,
   this->u_.in_output_segment.offset_base = offset_base;
   this->source_ = IN_OUTPUT_SEGMENT;
   this->in_reg_ = true;
+  this->in_real_elf_ = true;
 }
 
 // Initialize the fields in the base class Symbol for a symbol defined
@@ -163,6 +168,7 @@ Symbol::init_base_constant(const char* name, const char* version,
   this->init_fields(name, version, type, binding, visibility, nonvis);
   this->source_ = IS_CONSTANT;
   this->in_reg_ = true;
+  this->in_real_elf_ = true;
 }
 
 // Initialize the fields in the base class Symbol for an undefined
@@ -177,6 +183,7 @@ Symbol::init_base_undefined(const char* name, const char* version,
   this->dynsym_index_ = -1U;
   this->source_ = IS_UNDEFINED;
   this->in_reg_ = true;
+  this->in_real_elf_ = true;
 }
 
 // Allocate a common symbol in the base.
@@ -357,6 +364,7 @@ Symbol::output_section() const
 	if (shndx != elfcpp::SHN_UNDEF && this->is_ordinary_shndx_)
 	  {
 	    gold_assert(!this->u_.from_object.object->is_dynamic());
+	    gold_assert(this->u_.from_object.object->pluginobj() == NULL);
 	    Relobj* relobj = static_cast<Relobj*>(this->u_.from_object.object);
 	    return relobj->output_section(shndx);
 	  }
@@ -973,6 +981,68 @@ Symbol_table::add_from_relobj(
     }
 }
 
+// Add a symbol from a plugin-claimed file.
+
+template<int size, bool big_endian>
+Symbol*
+Symbol_table::add_from_pluginobj(
+    Sized_pluginobj<size, big_endian>* obj,
+    const char* name,
+    const char* ver,
+    elfcpp::Sym<size, big_endian>* sym)
+{
+  unsigned int st_shndx = sym->get_st_shndx();
+
+  Stringpool::Key ver_key = 0;
+  bool def = false;
+  bool local = false;
+
+  if (ver != NULL)
+    {
+      ver = this->namepool_.add(ver, true, &ver_key);
+    }
+  // We don't want to assign a version to an undefined symbol,
+  // even if it is listed in the version script.  FIXME: What
+  // about a common symbol?
+  else
+    {
+      if (!this->version_script_.empty()
+          && st_shndx != elfcpp::SHN_UNDEF)
+        {
+          // The symbol name did not have a version, but the
+          // version script may assign a version anyway.
+          std::string version;
+          if (this->version_script_.get_symbol_version(name, &version))
+            {
+              // The version can be empty if the version script is
+              // only used to force some symbols to be local.
+              if (!version.empty())
+                {
+                  ver = this->namepool_.add_with_length(version.c_str(),
+                                                        version.length(),
+                                                        true,
+                                                        &ver_key);
+                  def = true;
+                }
+            }
+          else if (this->version_script_.symbol_is_local(name))
+            local = true;
+        }
+    }
+
+  Stringpool::Key name_key;
+  name = this->namepool_.add(name, true, &name_key);
+
+  Sized_symbol<size>* res;
+  res = this->add_from_object(obj, name, name_key, ver, ver_key,
+		              def, *sym, st_shndx, true, st_shndx);
+
+  if (local)
+	this->force_local(res);
+
+  return res;
+}
+
 // Add all the symbols in a dynamic object to the hash table.
 
 template<int size, bool big_endian>
@@ -2043,6 +2113,11 @@ Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
 	    value = 0;
 	    shndx = elfcpp::SHN_UNDEF;
 	  }
+	else if (symobj->pluginobj() != NULL)
+	  {
+	    value = 0;
+	    shndx = elfcpp::SHN_UNDEF;
+	  }
 	else if (shndx == elfcpp::SHN_UNDEF)
 	  value = 0;
 	else if (!is_ordinary
@@ -2061,11 +2136,20 @@ Symbol_table::sized_finalize_symbol(Symbol* unsized_sym)
 	      }
 
             uint64_t secoff64 = relobj->output_section_offset(shndx);
-            Value_type secoff = convert_types<Value_type, uint64_t>(secoff64);
-	    if (sym->type() == elfcpp::STT_TLS)
-	      value = sym->value() + os->tls_offset() + secoff;
-	    else
-	      value = sym->value() + os->address() + secoff;
+            if (secoff64 == -1ULL)
+              {
+                // The section needs special handling (e.g., a merge section).
+	        value = os->output_address(relobj, shndx, sym->value());
+	      }
+            else
+              {
+                Value_type secoff =
+                  convert_types<Value_type, uint64_t>(secoff64);
+	        if (sym->type() == elfcpp::STT_TLS)
+	          value = sym->value() + os->tls_offset() + secoff;
+	        else
+	          value = sym->value() + os->address() + secoff;
+	      }
 	  }
       }
       break;
@@ -2261,6 +2345,8 @@ Symbol_table::sized_write_globals(const Input_objects* input_objects,
 		      dynsym_value = target.dynsym_value(sym);
 		    shndx = elfcpp::SHN_UNDEF;
 		  }
+		else if (symobj->pluginobj() != NULL)
+		  shndx = elfcpp::SHN_UNDEF;
 		else if (in_shndx == elfcpp::SHN_UNDEF
 			 || (!is_ordinary
 			     && (in_shndx == elfcpp::SHN_ABS
@@ -2703,6 +2789,46 @@ Symbol_table::add_from_relobj<64, true>(
 
 #ifdef HAVE_TARGET_32_LITTLE
 template
+Symbol*
+Symbol_table::add_from_pluginobj<32, false>(
+    Sized_pluginobj<32, false>* obj,
+    const char* name,
+    const char* ver,
+    elfcpp::Sym<32, false>* sym);
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+Symbol*
+Symbol_table::add_from_pluginobj<32, true>(
+    Sized_pluginobj<32, true>* obj,
+    const char* name,
+    const char* ver,
+    elfcpp::Sym<32, true>* sym);
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+Symbol*
+Symbol_table::add_from_pluginobj<64, false>(
+    Sized_pluginobj<64, false>* obj,
+    const char* name,
+    const char* ver,
+    elfcpp::Sym<64, false>* sym);
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+Symbol*
+Symbol_table::add_from_pluginobj<64, true>(
+    Sized_pluginobj<64, true>* obj,
+    const char* name,
+    const char* ver,
+    elfcpp::Sym<64, true>* sym);
+#endif
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
 void
 Symbol_table::add_from_dynobj<32, false>(
     Sized_dynobj<32, false>* dynobj,
diff --git a/gold/symtab.h b/gold/symtab.h
index 043fb50f..cfd0c73 100644
--- a/gold/symtab.h
+++ b/gold/symtab.h
@@ -43,6 +43,8 @@ class Object;
 class Relobj;
 template<int size, bool big_endian>
 class Sized_relobj;
+template<int size, bool big_endian>
+class Sized_pluginobj;
 class Dynobj;
 template<int size, bool big_endian>
 class Sized_dynobj;
@@ -273,6 +275,18 @@ class Symbol
   set_in_dyn()
   { this->in_dyn_ = true; }
 
+  // Return whether this symbol has been seen in a real ELF object.
+  // (IN_REG will return TRUE if the symbol has been seen in either
+  // a real ELF object or an object claimed by a plugin.)
+  bool
+  in_real_elf() const
+  { return this->in_real_elf_; }
+
+  // Mark this symbol as having been seen in a real ELF object.
+  void
+  set_in_real_elf()
+  { this->in_real_elf_ = true; }
+
   // Return the index of this symbol in the output file symbol table.
   // A value of -1U means that this symbol is not going into the
   // output file.  This starts out as zero, and is set to a non-zero
@@ -871,8 +885,10 @@ class Symbol
   bool is_forced_local_ : 1;
   // True if the field u_.from_object.shndx is an ordinary section
   // index, not one of the special codes from SHN_LORESERVE to
-  // SHN_HIRESERVE.
+  // SHN_HIRESERVE (bit 31).
   bool is_ordinary_shndx_ : 1;
+  // True if we've seen this symbol in a real ELF object.
+  bool in_real_elf_ : 1;
 };
 
 // The parts of a symbol which are size specific.  Using a template
@@ -1139,6 +1155,14 @@ class Symbol_table
 		  typename Sized_relobj<size, big_endian>::Symbols*,
 		  size_t* defined);
 
+  // Add one external symbol from the plugin object OBJ to the symbol table.
+  // Returns a pointer to the resolved symbol in the symbol table.
+  template<int size, bool big_endian>
+  Symbol*
+  add_from_pluginobj(Sized_pluginobj<size, big_endian>* obj,
+                     const char* name, const char* ver,
+                     elfcpp::Sym<size, big_endian>* sym);
+
   // Add COUNT dynamic symbols from the dynamic object DYNOBJ to the
   // symbol table.  SYMS is the symbols.  SYM_NAMES is their names.
   // SYM_NAME_SIZE is the size of SYM_NAMES.  The other parameters are
diff --git a/gold/target-reloc.h b/gold/target-reloc.h
index 6683ddd..935d76b 100644
--- a/gold/target-reloc.h
+++ b/gold/target-reloc.h
@@ -283,6 +283,7 @@ relocate_section(
       if (sym != NULL
 	  && sym->is_undefined()
 	  && sym->binding() != elfcpp::STB_WEAK
+          && !target->is_defined_by_abi(sym)
 	  && (!parameters->options().shared()       // -shared
               || parameters->options().defs()))     // -z defs
 	gold_undefined_symbol(sym, relinfo, i, offset);
@@ -449,6 +450,7 @@ relocate_for_relocatable(
   typedef typename Reloc_types<sh_type, size, big_endian>::Reloc_write
     Reltype_write;
   const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size;
+  const Address invalid_address = static_cast<Address>(0) - 1;
 
   Sized_relobj<size, big_endian>* const object = relinfo->object;
   const unsigned int local_count = object->local_symbol_count();
@@ -523,7 +525,7 @@ relocate_for_relocatable(
 
       Address offset = reloc.get_r_offset();
       Address new_offset;
-      if (offset_in_output_section != -1U)
+      if (offset_in_output_section != invalid_address)
 	new_offset = offset + offset_in_output_section;
       else
 	{
@@ -542,7 +544,7 @@ relocate_for_relocatable(
       if (!parameters->options().relocatable())
 	{
 	  new_offset += view_address;
-	  if (offset_in_output_section != -1U)
+	  if (offset_in_output_section != invalid_address)
 	    new_offset -= offset_in_output_section;
 	}
 
diff --git a/gold/target.h b/gold/target.h
index 30fa008..460ac96 100644
--- a/gold/target.h
+++ b/gold/target.h
@@ -164,7 +164,7 @@ class Target
   // Return whether SYM is known to be defined by the ABI.  This is
   // used to avoid inappropriate warnings about undefined symbols.
   bool
-  is_defined_by_abi(Symbol* sym) const
+  is_defined_by_abi(const Symbol* sym) const
   { return this->do_is_defined_by_abi(sym); }
 
  protected:
@@ -222,7 +222,7 @@ class Target
 
   // Virtual function which may be implemented by the child class.
   virtual bool
-  do_is_defined_by_abi(Symbol*) const
+  do_is_defined_by_abi(const Symbol*) const
   { return false; }
 
  private:
diff --git a/gold/testsuite/Makefile.am b/gold/testsuite/Makefile.am
index c9dd470..57d96cd 100644
--- a/gold/testsuite/Makefile.am
+++ b/gold/testsuite/Makefile.am
@@ -9,6 +9,7 @@ AUTOMAKE_OPTIONS =
 # The two_file_test tests -fmerge-constants, so we simply always turn
 # it on.  This may need to be controlled by a configure option
 # eventually.
+AM_CFLAGS = $(WARN_CFLAGS) $(LFS_CFLAGS) -fmerge-constants
 AM_CXXFLAGS = $(WARN_CXXFLAGS) $(LFS_CFLAGS) -fmerge-constants
 
 INCLUDES = \
@@ -21,6 +22,11 @@ TEST_READELF = $(top_builddir)/../binutils/readelf
 TEST_OBJDUMP = $(top_builddir)/../binutils/objdump
 TEST_CXXFILT = $(top_builddir)/../binutils/cxxfilt
 TEST_STRIP = $(top_builddir)/../binutils/strip-new
+TEST_AR = $(top_builddir)/../binutils/ar
+
+if PLUGINS
+LIBDL = -ldl
+endif
 
 if THREADS
 THREADSLIB = -lpthread
@@ -57,7 +63,7 @@ libgoldtest_a_SOURCES = test.cc testmain.cc testfile.cc
 DEPENDENCIES = \
 	libgoldtest.a ../libgold.a ../../libiberty/libiberty.a $(LIBINTL_DEP)
 LDADD = libgoldtest.a ../libgold.a ../../libiberty/libiberty.a $(LIBINTL) \
-	$(THREADSLIB)
+	$(THREADSLIB) $(LIBDL)
 
 
 # The unittests themselves
@@ -468,7 +474,7 @@ tls_test_file2_pic.o: tls_test_file2.cc
 tls_test_c_pic.o: tls_test_c.c
 	$(COMPILE) -c -fpic $(TLS_TEST_C_CFLAGS) -o $@ $<
 tls_test_shared.so: tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o gcctestdir/ld
-	$(CXXLINK) -Bgcctestdir/ -shared tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o
+	$(CXXLINK) -Bgcctestdir/ -shared tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o -Wl,-z,defs
 tls_test_shared2.so: tls_test_file2_pic.o gcctestdir/ld
 	$(CXXLINK) -Bgcctestdir/ -shared tls_test_file2_pic.o
 
@@ -897,5 +903,75 @@ script_test_4: basic_test.o gcctestdir/ld $(srcdir)/script_test_4.t
 script_test_4.stdout: script_test_4
 	$(TEST_READELF) -SlW script_test_4 > script_test_4.stdout
 
+check_PROGRAMS += thin_archive_test_1
+thin_archive_test_1_SOURCES = thin_archive_main.cc
+thin_archive_test_1_DEPENDENCIES = gcctestdir/ld libthin1.a alt/libthin2.a
+thin_archive_test_1_LDFLAGS = -Bgcctestdir/ -Lalt
+thin_archive_test_1_LDADD = libthin1.a -lthin2
+
+check_PROGRAMS += thin_archive_test_2
+thin_archive_test_2_SOURCES = thin_archive_main.cc
+thin_archive_test_2_DEPENDENCIES = gcctestdir/ld libthinall.a
+thin_archive_test_2_LDFLAGS = -Bgcctestdir/ -L.
+thin_archive_test_2_LDADD = -lthinall
+
+libthin1.a: thin_archive_test_1.o alt/thin_archive_test_2.o
+	rm -f $@
+	$(TEST_AR) crT $@ $^
+alt/libthin2.a: thin_archive_test_3.o alt/thin_archive_test_4.o
+	rm -f $@
+	$(TEST_AR) crT $@ $^
+libthin3.a: thin_archive_test_1.o alt/thin_archive_test_4.o
+	rm -f $@
+	$(TEST_AR) crT $@ $^
+alt/libthin4.a: alt/thin_archive_test_2.o thin_archive_test_3.o
+	rm -f $@
+	$(TEST_AR) crT $@ $^
+libthinall.a: libthin3.a alt/libthin4.a
+	rm -f $@
+	$(TEST_AR) crT $@ $^
+alt/thin_archive_test_2.o: thin_archive_test_2.cc
+	test -d alt || mkdir -p alt
+	$(CXXCOMPILE) -c -o $@ $<
+alt/thin_archive_test_4.o: thin_archive_test_4.cc
+	test -d alt || mkdir -p alt
+	$(CXXCOMPILE) -c -o $@ $<
+
+if PLUGINS
+
+check_PROGRAMS += plugin_test_1
+check_SCRIPTS += plugin_test_1.sh
+check_DATA += plugin_test_1.err
+MOSTLYCLEANFILES += plugin_test_1.err
+plugin_test_1: two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_test_2.syms gcctestdir/ld plugin_test.so
+	$(CXXLINK) -Bgcctestdir/ -Wl,--no-demangle,--plugin,"./plugin_test.so;_Z4f13iv" two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_test_2.syms 2>plugin_test_1.err
+plugin_test_1.err: plugin_test_1
+	@touch plugin_test_1.err
+
+check_PROGRAMS += plugin_test_2
+check_SCRIPTS += plugin_test_2.sh
+check_DATA += plugin_test_2.err
+MOSTLYCLEANFILES += plugin_test_2.err
+plugin_test_2: two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_shared_2.so gcctestdir/ld plugin_test.so
+	$(CXXLINK) -Bgcctestdir/ -Wl,--no-demangle,-R,.,--plugin,"./plugin_test.so" two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_shared_2.so 2>plugin_test_2.err
+plugin_test_2.err: plugin_test_2
+	@touch plugin_test_2.err
+
+plugin_test.so: plugin_test.o
+	$(LINK) -Bgcctestdir/ -shared plugin_test.o
+plugin_test.o: plugin_test.c
+	$(COMPILE) -O0 -c -fpic -o $@ $<
+
+two_file_test_main.syms: two_file_test_main.o
+	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+two_file_test_1.syms: two_file_test_1.o
+	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+two_file_test_1b.syms: two_file_test_1b.o
+	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+two_file_test_2.syms: two_file_test_2.o
+	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+
+endif PLUGINS
+
 endif GCC
 endif NATIVE_LINKER
diff --git a/gold/testsuite/Makefile.in b/gold/testsuite/Makefile.in
index 9f72b88..54b2364 100644
--- a/gold/testsuite/Makefile.in
+++ b/gold/testsuite/Makefile.in
@@ -47,7 +47,8 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 	$(am__EXEEXT_4) $(am__EXEEXT_5) $(am__EXEEXT_6) \
 	$(am__EXEEXT_7) $(am__EXEEXT_8) $(am__EXEEXT_9) \
 	$(am__EXEEXT_10) $(am__EXEEXT_11) $(am__EXEEXT_12) \
-	$(am__EXEEXT_13) $(am__EXEEXT_14) $(am__EXEEXT_15)
+	$(am__EXEEXT_13) $(am__EXEEXT_14) $(am__EXEEXT_15) \
+	$(am__EXEEXT_16)
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_1 = basic_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	basic_static_test basic_pic_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	basic_static_pic_test \
@@ -66,33 +67,39 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	two_file_relocatable_test
 @GCC_FALSE@constructor_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@constructor_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@constructor_static_test_DEPENDENCIES = libgoldtest.a \
 @GCC_FALSE@	../libgold.a ../../libiberty/libiberty.a \
-@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+@GCC_FALSE@	$(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@constructor_static_test_DEPENDENCIES =  \
 @NATIVE_LINKER_FALSE@	libgoldtest.a ../libgold.a \
 @NATIVE_LINKER_FALSE@	../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@two_file_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@two_file_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@two_file_static_test_DEPENDENCIES = libgoldtest.a \
 @GCC_FALSE@	../libgold.a ../../libiberty/libiberty.a \
-@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+@GCC_FALSE@	$(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@two_file_static_test_DEPENDENCIES =  \
 @NATIVE_LINKER_FALSE@	libgoldtest.a ../libgold.a \
 @NATIVE_LINKER_FALSE@	../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 
 # The nonpic tests will fail on platforms which can not put non-PIC
@@ -116,32 +123,37 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	weak_test weak_undef_test
 @GCC_FALSE@common_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@common_test_1_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@exception_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@exception_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@exception_static_test_DEPENDENCIES = libgoldtest.a \
 @GCC_FALSE@	../libgold.a ../../libiberty/libiberty.a \
-@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+@GCC_FALSE@	$(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@exception_static_test_DEPENDENCIES =  \
 @NATIVE_LINKER_FALSE@	libgoldtest.a ../libgold.a \
 @NATIVE_LINKER_FALSE@	../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@weak_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@weak_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @FN_PTRS_IN_SO_WITHOUT_PIC_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_4 = weak_undef_nonpic_test
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_5 = weak_alias_test weak_plt \
@@ -187,10 +199,12 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	many_sections_r_test
 @GCC_FALSE@many_sections_test_DEPENDENCIES = libgoldtest.a \
 @GCC_FALSE@	../libgold.a ../../libiberty/libiberty.a \
-@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+@GCC_FALSE@	$(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@many_sections_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_14 = many_sections_define.h \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	many_sections_check.h
@@ -199,13 +213,15 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @CONSTRUCTOR_PRIORITY_FALSE@	../libgold.a \
 @CONSTRUCTOR_PRIORITY_FALSE@	../../libiberty/libiberty.a \
 @CONSTRUCTOR_PRIORITY_FALSE@	$(am__DEPENDENCIES_1) \
+@CONSTRUCTOR_PRIORITY_FALSE@	$(am__DEPENDENCIES_1) \
 @CONSTRUCTOR_PRIORITY_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@initpri1_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@initpri1_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am__append_16 = debug_msg.err \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	debug_msg_so.err \
@@ -232,35 +248,55 @@ check_PROGRAMS = object_unittest$(EXEEXT) binary_unittest$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	relro_test relro_script_test \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_1 script_test_2 \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	justsyms binary_test \
-@GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_3
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_3 \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_test_1 \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_test_2
 @GCC_FALSE@script_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@script_test_1_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@script_test_2_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@script_test_2_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@justsyms_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@justsyms_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
 @GCC_FALSE@binary_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 @GCC_FALSE@	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-@GCC_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 @NATIVE_LINKER_FALSE@binary_test_DEPENDENCIES = libgoldtest.a \
 @NATIVE_LINKER_FALSE@	../libgold.a ../../libiberty/libiberty.a \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
+@NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1) \
 @NATIVE_LINKER_FALSE@	$(am__DEPENDENCIES_1)
+@GCC_FALSE@thin_archive_test_2_DEPENDENCIES =
+@NATIVE_LINKER_FALSE@thin_archive_test_2_DEPENDENCIES =
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__append_20 =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_1 \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_2
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__append_21 =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_1.sh \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_2.sh
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__append_22 =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_1.err \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_2.err
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__append_23 =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_1.err \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_2.err
 subdir = testsuite
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -357,32 +393,36 @@ libgoldtest_a_OBJECTS = $(am_libgoldtest_a_OBJECTS)
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_2$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	justsyms$(EXEEXT) \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	binary_test$(EXEEXT) \
-@GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_3$(EXEEXT)
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	script_test_3$(EXEEXT) \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_test_1$(EXEEXT) \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_test_2$(EXEEXT)
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@am__EXEEXT_16 = plugin_test_1$(EXEEXT) \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	plugin_test_2$(EXEEXT)
 basic_pic_test_SOURCES = basic_pic_test.c
 basic_pic_test_OBJECTS = basic_pic_test.$(OBJEXT)
 basic_pic_test_LDADD = $(LDADD)
 am__DEPENDENCIES_1 =
 basic_pic_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 basic_static_pic_test_SOURCES = basic_static_pic_test.c
 basic_static_pic_test_OBJECTS = basic_static_pic_test.$(OBJEXT)
 basic_static_pic_test_LDADD = $(LDADD)
 basic_static_pic_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 basic_static_test_SOURCES = basic_static_test.c
 basic_static_test_OBJECTS = basic_static_test.$(OBJEXT)
 basic_static_test_LDADD = $(LDADD)
 basic_static_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 basic_test_SOURCES = basic_test.c
 basic_test_OBJECTS = basic_test.$(OBJEXT)
 basic_test_LDADD = $(LDADD)
 basic_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__binary_test_SOURCES_DIST = binary_test.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_binary_test_OBJECTS =  \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	binary_test.$(OBJEXT)
@@ -393,7 +433,7 @@ binary_unittest_OBJECTS = $(am_binary_unittest_OBJECTS)
 binary_unittest_LDADD = $(LDADD)
 binary_unittest_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__common_test_1_SOURCES_DIST = common_test_1.c
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_common_test_1_OBJECTS =  \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	common_test_1.$(OBJEXT)
@@ -472,13 +512,13 @@ flagstest_compress_debug_sections_OBJECTS =  \
 flagstest_compress_debug_sections_LDADD = $(LDADD)
 flagstest_compress_debug_sections_DEPENDENCIES = libgoldtest.a \
 	../libgold.a ../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 flagstest_o_specialfile_SOURCES = flagstest_o_specialfile.c
 flagstest_o_specialfile_OBJECTS = flagstest_o_specialfile.$(OBJEXT)
 flagstest_o_specialfile_LDADD = $(LDADD)
 flagstest_o_specialfile_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 flagstest_o_specialfile_and_compress_debug_sections_SOURCES =  \
 	flagstest_o_specialfile_and_compress_debug_sections.c
 flagstest_o_specialfile_and_compress_debug_sections_OBJECTS =  \
@@ -486,7 +526,8 @@ flagstest_o_specialfile_and_compress_debug_sections_OBJECTS =  \
 flagstest_o_specialfile_and_compress_debug_sections_LDADD = $(LDADD)
 flagstest_o_specialfile_and_compress_debug_sections_DEPENDENCIES =  \
 	libgoldtest.a ../libgold.a ../../libiberty/libiberty.a \
-	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1)
 am__initpri1_SOURCES_DIST = initpri1.c
 @CONSTRUCTOR_PRIORITY_TRUE@@GCC_TRUE@@NATIVE_LINKER_TRUE@am_initpri1_OBJECTS = initpri1.$(OBJEXT)
 initpri1_OBJECTS = $(am_initpri1_OBJECTS)
@@ -501,7 +542,7 @@ many_sections_r_test_OBJECTS = many_sections_r_test.$(OBJEXT)
 many_sections_r_test_LDADD = $(LDADD)
 many_sections_r_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__many_sections_test_SOURCES_DIST = many_sections_test.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_many_sections_test_OBJECTS =  \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	many_sections_test.$(OBJEXT)
@@ -512,7 +553,19 @@ object_unittest_OBJECTS = $(am_object_unittest_OBJECTS)
 object_unittest_LDADD = $(LDADD)
 object_unittest_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+plugin_test_1_SOURCES = plugin_test_1.c
+plugin_test_1_OBJECTS = plugin_test_1.$(OBJEXT)
+plugin_test_1_LDADD = $(LDADD)
+plugin_test_1_DEPENDENCIES = libgoldtest.a ../libgold.a \
+	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+plugin_test_2_SOURCES = plugin_test_2.c
+plugin_test_2_OBJECTS = plugin_test_2.$(OBJEXT)
+plugin_test_2_LDADD = $(LDADD)
+plugin_test_2_DEPENDENCIES = libgoldtest.a ../libgold.a \
+	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__protected_1_SOURCES_DIST = protected_main_1.cc protected_main_2.cc \
 	protected_main_3.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_protected_1_OBJECTS =  \
@@ -551,7 +604,15 @@ script_test_3_OBJECTS = script_test_3.$(OBJEXT)
 script_test_3_LDADD = $(LDADD)
 script_test_3_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+am__thin_archive_test_1_SOURCES_DIST = thin_archive_main.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@am_thin_archive_test_1_OBJECTS =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_main.$(OBJEXT)
+thin_archive_test_1_OBJECTS = $(am_thin_archive_test_1_OBJECTS)
+am__thin_archive_test_2_SOURCES_DIST = thin_archive_main.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@am_thin_archive_test_2_OBJECTS =  \
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	thin_archive_main.$(OBJEXT)
+thin_archive_test_2_OBJECTS = $(am_thin_archive_test_2_OBJECTS)
 am__tls_pic_test_SOURCES_DIST = tls_test_main.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@am_tls_pic_test_OBJECTS = tls_test_main.$(OBJEXT)
 tls_pic_test_OBJECTS = $(am_tls_pic_test_OBJECTS)
@@ -708,7 +769,7 @@ two_file_strip_test_OBJECTS = two_file_strip_test.$(OBJEXT)
 two_file_strip_test_LDADD = $(LDADD)
 two_file_strip_test_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__two_file_test_SOURCES_DIST = two_file_test_1.cc \
 	two_file_test_1b.cc two_file_test_2.cc two_file_test_main.cc \
 	two_file_test.h
@@ -748,7 +809,7 @@ weak_plt_OBJECTS = weak_plt.$(OBJEXT)
 weak_plt_LDADD = $(LDADD)
 weak_plt_DEPENDENCIES = libgoldtest.a ../libgold.a \
 	../../libiberty/libiberty.a $(am__DEPENDENCIES_1) \
-	$(am__DEPENDENCIES_1)
+	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
 am__weak_test_SOURCES_DIST = weak_test.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@am_weak_test_OBJECTS =  \
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	weak_test.$(OBJEXT)
@@ -788,11 +849,12 @@ SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
 	flagstest_o_specialfile_and_compress_debug_sections.c \
 	$(initpri1_SOURCES) $(justsyms_SOURCES) many_sections_r_test.c \
 	$(many_sections_test_SOURCES) $(object_unittest_SOURCES) \
-	$(protected_1_SOURCES) $(protected_2_SOURCES) \
-	$(relro_script_test_SOURCES) $(relro_test_SOURCES) \
-	$(script_test_1_SOURCES) $(script_test_2_SOURCES) \
-	script_test_3.c $(tls_pic_test_SOURCES) \
-	$(tls_shared_gd_to_ie_test_SOURCES) \
+	plugin_test_1.c plugin_test_2.c $(protected_1_SOURCES) \
+	$(protected_2_SOURCES) $(relro_script_test_SOURCES) \
+	$(relro_test_SOURCES) $(script_test_1_SOURCES) \
+	$(script_test_2_SOURCES) script_test_3.c \
+	$(thin_archive_test_1_SOURCES) $(thin_archive_test_2_SOURCES) \
+	$(tls_pic_test_SOURCES) $(tls_shared_gd_to_ie_test_SOURCES) \
 	$(tls_shared_gnu2_gd_to_ie_test_SOURCES) \
 	$(tls_shared_gnu2_test_SOURCES) $(tls_shared_ie_test_SOURCES) \
 	$(tls_shared_nonpic_test_SOURCES) $(tls_shared_test_SOURCES) \
@@ -838,12 +900,15 @@ DIST_SOURCES = $(libgoldtest_a_SOURCES) basic_pic_test.c \
 	flagstest_o_specialfile_and_compress_debug_sections.c \
 	$(am__initpri1_SOURCES_DIST) $(am__justsyms_SOURCES_DIST) \
 	many_sections_r_test.c $(am__many_sections_test_SOURCES_DIST) \
-	$(object_unittest_SOURCES) $(am__protected_1_SOURCES_DIST) \
+	$(object_unittest_SOURCES) plugin_test_1.c plugin_test_2.c \
+	$(am__protected_1_SOURCES_DIST) \
 	$(am__protected_2_SOURCES_DIST) \
 	$(am__relro_script_test_SOURCES_DIST) \
 	$(am__relro_test_SOURCES_DIST) \
 	$(am__script_test_1_SOURCES_DIST) \
 	$(am__script_test_2_SOURCES_DIST) script_test_3.c \
+	$(am__thin_archive_test_1_SOURCES_DIST) \
+	$(am__thin_archive_test_2_SOURCES_DIST) \
 	$(am__tls_pic_test_SOURCES_DIST) \
 	$(am__tls_shared_gd_to_ie_test_SOURCES_DIST) \
 	$(am__tls_shared_gnu2_gd_to_ie_test_SOURCES_DIST) \
@@ -954,6 +1019,8 @@ PACKAGE_STRING = @PACKAGE_STRING@
 PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
+PLUGINS_FALSE = @PLUGINS_FALSE@
+PLUGINS_TRUE = @PLUGINS_TRUE@
 POSUB = @POSUB@
 RANDOM_SEED_CFLAGS = @RANDOM_SEED_CFLAGS@
 RANLIB = @RANLIB@
@@ -1027,6 +1094,7 @@ AUTOMAKE_OPTIONS =
 # The two_file_test tests -fmerge-constants, so we simply always turn
 # it on.  This may need to be controlled by a configure option
 # eventually.
+AM_CFLAGS = $(WARN_CFLAGS) $(LFS_CFLAGS) -fmerge-constants
 AM_CXXFLAGS = $(WARN_CXXFLAGS) $(LFS_CFLAGS) -fmerge-constants
 INCLUDES = \
 	-I$(srcdir) -I$(srcdir)/.. -I$(srcdir)/../../include \
@@ -1038,6 +1106,8 @@ TEST_READELF = $(top_builddir)/../binutils/readelf
 TEST_OBJDUMP = $(top_builddir)/../binutils/objdump
 TEST_CXXFILT = $(top_builddir)/../binutils/cxxfilt
 TEST_STRIP = $(top_builddir)/../binutils/strip-new
+TEST_AR = $(top_builddir)/../binutils/ar
+@PLUGINS_TRUE@LIBDL = -ldl
 @THREADS_TRUE@THREADSLIB = -lpthread
 @OMP_SUPPORT_TRUE@TLS_TEST_C_CFLAGS = -fopenmp
 
@@ -1045,13 +1115,13 @@ TEST_STRIP = $(top_builddir)/../binutils/strip-new
 # .o's), but not all of them (such as .so's and .err files).  We
 # improve on that here.  automake-1.9 info docs say "mostlyclean" is
 # the right choice for files 'make' builds that people rebuild.
-MOSTLYCLEANFILES = *.so $(am__append_16)
+MOSTLYCLEANFILES = *.so $(am__append_16) $(am__append_23)
 
 # We will add to these later, for each individual test.  Note
 # that we add each test under check_SCRIPTS or check_PROGRAMS;
 # the TESTS variable is automatically populated from these.
-check_SCRIPTS = $(am__append_6)
-check_DATA = $(am__append_7)
+check_SCRIPTS = $(am__append_6) $(am__append_21)
+check_DATA = $(am__append_7) $(am__append_22)
 BUILT_SOURCES = $(am__append_14)
 TESTS = $(check_SCRIPTS) $(check_PROGRAMS)
 
@@ -1065,7 +1135,7 @@ DEPENDENCIES = \
 	libgoldtest.a ../libgold.a ../../libiberty/libiberty.a $(LIBINTL_DEP)
 
 LDADD = libgoldtest.a ../libgold.a ../../libiberty/libiberty.a $(LIBINTL) \
-	$(THREADSLIB)
+	$(THREADSLIB) $(LIBDL)
 
 object_unittest_SOURCES = object_unittest.cc
 binary_unittest_SOURCES = binary_unittest.cc
@@ -1366,6 +1436,14 @@ binary_unittest_SOURCES = binary_unittest.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@binary_test_SOURCES = binary_test.cc
 @GCC_TRUE@@NATIVE_LINKER_TRUE@binary_test_DEPENDENCIES = gcctestdir/ld binary.txt
 @GCC_TRUE@@NATIVE_LINKER_TRUE@binary_test_LDFLAGS = -Bgcctestdir/ -Wl,--format,binary,binary.txt,--format,elf
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_1_SOURCES = thin_archive_main.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_1_DEPENDENCIES = gcctestdir/ld libthin1.a alt/libthin2.a
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_1_LDFLAGS = -Bgcctestdir/ -Lalt
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_1_LDADD = libthin1.a -lthin2
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_2_SOURCES = thin_archive_main.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_2_DEPENDENCIES = gcctestdir/ld libthinall.a
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_2_LDFLAGS = -Bgcctestdir/ -L.
+@GCC_TRUE@@NATIVE_LINKER_TRUE@thin_archive_test_2_LDADD = -lthinall
 all: $(BUILT_SOURCES)
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 
@@ -1515,6 +1593,24 @@ many_sections_test$(EXEEXT): $(many_sections_test_OBJECTS) $(many_sections_test_
 object_unittest$(EXEEXT): $(object_unittest_OBJECTS) $(object_unittest_DEPENDENCIES) 
 	@rm -f object_unittest$(EXEEXT)
 	$(CXXLINK) $(object_unittest_LDFLAGS) $(object_unittest_OBJECTS) $(object_unittest_LDADD) $(LIBS)
+@GCC_FALSE@plugin_test_1$(EXEEXT): $(plugin_test_1_OBJECTS) $(plugin_test_1_DEPENDENCIES) 
+@GCC_FALSE@	@rm -f plugin_test_1$(EXEEXT)
+@GCC_FALSE@	$(LINK) $(plugin_test_1_LDFLAGS) $(plugin_test_1_OBJECTS) $(plugin_test_1_LDADD) $(LIBS)
+@NATIVE_LINKER_FALSE@plugin_test_1$(EXEEXT): $(plugin_test_1_OBJECTS) $(plugin_test_1_DEPENDENCIES) 
+@NATIVE_LINKER_FALSE@	@rm -f plugin_test_1$(EXEEXT)
+@NATIVE_LINKER_FALSE@	$(LINK) $(plugin_test_1_LDFLAGS) $(plugin_test_1_OBJECTS) $(plugin_test_1_LDADD) $(LIBS)
+@PLUGINS_FALSE@plugin_test_1$(EXEEXT): $(plugin_test_1_OBJECTS) $(plugin_test_1_DEPENDENCIES) 
+@PLUGINS_FALSE@	@rm -f plugin_test_1$(EXEEXT)
+@PLUGINS_FALSE@	$(LINK) $(plugin_test_1_LDFLAGS) $(plugin_test_1_OBJECTS) $(plugin_test_1_LDADD) $(LIBS)
+@GCC_FALSE@plugin_test_2$(EXEEXT): $(plugin_test_2_OBJECTS) $(plugin_test_2_DEPENDENCIES) 
+@GCC_FALSE@	@rm -f plugin_test_2$(EXEEXT)
+@GCC_FALSE@	$(LINK) $(plugin_test_2_LDFLAGS) $(plugin_test_2_OBJECTS) $(plugin_test_2_LDADD) $(LIBS)
+@NATIVE_LINKER_FALSE@plugin_test_2$(EXEEXT): $(plugin_test_2_OBJECTS) $(plugin_test_2_DEPENDENCIES) 
+@NATIVE_LINKER_FALSE@	@rm -f plugin_test_2$(EXEEXT)
+@NATIVE_LINKER_FALSE@	$(LINK) $(plugin_test_2_LDFLAGS) $(plugin_test_2_OBJECTS) $(plugin_test_2_LDADD) $(LIBS)
+@PLUGINS_FALSE@plugin_test_2$(EXEEXT): $(plugin_test_2_OBJECTS) $(plugin_test_2_DEPENDENCIES) 
+@PLUGINS_FALSE@	@rm -f plugin_test_2$(EXEEXT)
+@PLUGINS_FALSE@	$(LINK) $(plugin_test_2_LDFLAGS) $(plugin_test_2_OBJECTS) $(plugin_test_2_LDADD) $(LIBS)
 protected_1$(EXEEXT): $(protected_1_OBJECTS) $(protected_1_DEPENDENCIES) 
 	@rm -f protected_1$(EXEEXT)
 	$(CXXLINK) $(protected_1_LDFLAGS) $(protected_1_OBJECTS) $(protected_1_LDADD) $(LIBS)
@@ -1539,6 +1635,12 @@ script_test_2$(EXEEXT): $(script_test_2_OBJECTS) $(script_test_2_DEPENDENCIES)
 @NATIVE_LINKER_FALSE@script_test_3$(EXEEXT): $(script_test_3_OBJECTS) $(script_test_3_DEPENDENCIES) 
 @NATIVE_LINKER_FALSE@	@rm -f script_test_3$(EXEEXT)
 @NATIVE_LINKER_FALSE@	$(LINK) $(script_test_3_LDFLAGS) $(script_test_3_OBJECTS) $(script_test_3_LDADD) $(LIBS)
+thin_archive_test_1$(EXEEXT): $(thin_archive_test_1_OBJECTS) $(thin_archive_test_1_DEPENDENCIES) 
+	@rm -f thin_archive_test_1$(EXEEXT)
+	$(CXXLINK) $(thin_archive_test_1_LDFLAGS) $(thin_archive_test_1_OBJECTS) $(thin_archive_test_1_LDADD) $(LIBS)
+thin_archive_test_2$(EXEEXT): $(thin_archive_test_2_OBJECTS) $(thin_archive_test_2_DEPENDENCIES) 
+	@rm -f thin_archive_test_2$(EXEEXT)
+	$(CXXLINK) $(thin_archive_test_2_LDFLAGS) $(thin_archive_test_2_OBJECTS) $(thin_archive_test_2_LDADD) $(LIBS)
 tls_pic_test$(EXEEXT): $(tls_pic_test_OBJECTS) $(tls_pic_test_DEPENDENCIES) 
 	@rm -f tls_pic_test$(EXEEXT)
 	$(CXXLINK) $(tls_pic_test_LDFLAGS) $(tls_pic_test_OBJECTS) $(tls_pic_test_LDADD) $(LIBS)
@@ -1692,6 +1794,8 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/many_sections_r_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/many_sections_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/object_unittest.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin_test_1.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/plugin_test_2.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/protected_3.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/protected_main_1.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/protected_main_2.Po@am__quote@
@@ -1705,6 +1809,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/testfile.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/testmain.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/thin_archive_main.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tls_test.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tls_test_file2.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/tls_test_main.Po@am__quote@
@@ -2125,7 +2230,7 @@ uninstall-am: uninstall-info-am
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@tls_test_c_pic.o: tls_test_c.c
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@	$(COMPILE) -c -fpic $(TLS_TEST_C_CFLAGS) -o $@ $<
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@tls_test_shared.so: tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o gcctestdir/ld
-@GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@	$(CXXLINK) -Bgcctestdir/ -shared tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@	$(CXXLINK) -Bgcctestdir/ -shared tls_test_pic.o tls_test_file2_pic.o tls_test_c_pic.o -Wl,-z,defs
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@tls_test_shared2.so: tls_test_file2_pic.o gcctestdir/ld
 @GCC_TRUE@@NATIVE_LINKER_TRUE@@TLS_TRUE@	$(CXXLINK) -Bgcctestdir/ -shared tls_test_file2_pic.o
 
@@ -2313,6 +2418,50 @@ uninstall-am: uninstall-info-am
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXLINK) -Bgcctestdir/ basic_test.o -T $(srcdir)/script_test_4.t
 @GCC_TRUE@@NATIVE_LINKER_TRUE@script_test_4.stdout: script_test_4
 @GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_READELF) -SlW script_test_4 > script_test_4.stdout
+
+@GCC_TRUE@@NATIVE_LINKER_TRUE@libthin1.a: thin_archive_test_1.o alt/thin_archive_test_2.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	rm -f $@
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_AR) crT $@ $^
+@GCC_TRUE@@NATIVE_LINKER_TRUE@alt/libthin2.a: thin_archive_test_3.o alt/thin_archive_test_4.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	rm -f $@
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_AR) crT $@ $^
+@GCC_TRUE@@NATIVE_LINKER_TRUE@libthin3.a: thin_archive_test_1.o alt/thin_archive_test_4.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	rm -f $@
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_AR) crT $@ $^
+@GCC_TRUE@@NATIVE_LINKER_TRUE@alt/libthin4.a: alt/thin_archive_test_2.o thin_archive_test_3.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	rm -f $@
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_AR) crT $@ $^
+@GCC_TRUE@@NATIVE_LINKER_TRUE@libthinall.a: libthin3.a alt/libthin4.a
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	rm -f $@
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(TEST_AR) crT $@ $^
+@GCC_TRUE@@NATIVE_LINKER_TRUE@alt/thin_archive_test_2.o: thin_archive_test_2.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	test -d alt || mkdir -p alt
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -c -o $@ $<
+@GCC_TRUE@@NATIVE_LINKER_TRUE@alt/thin_archive_test_4.o: thin_archive_test_4.cc
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	test -d alt || mkdir -p alt
+@GCC_TRUE@@NATIVE_LINKER_TRUE@	$(CXXCOMPILE) -c -o $@ $<
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test_1: two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_test_2.syms gcctestdir/ld plugin_test.so
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(CXXLINK) -Bgcctestdir/ -Wl,--no-demangle,--plugin,"./plugin_test.so;_Z4f13iv" two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_test_2.syms 2>plugin_test_1.err
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test_1.err: plugin_test_1
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	@touch plugin_test_1.err
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test_2: two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_shared_2.so gcctestdir/ld plugin_test.so
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(CXXLINK) -Bgcctestdir/ -Wl,--no-demangle,-R,.,--plugin,"./plugin_test.so" two_file_test_main.o two_file_test_1.syms two_file_test_1b.syms two_file_shared_2.so 2>plugin_test_2.err
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test_2.err: plugin_test_2
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	@touch plugin_test_2.err
+
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test.so: plugin_test.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(LINK) -Bgcctestdir/ -shared plugin_test.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@plugin_test.o: plugin_test.c
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(COMPILE) -O0 -c -fpic -o $@ $<
+
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@two_file_test_main.syms: two_file_test_main.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@two_file_test_1.syms: two_file_test_1.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@two_file_test_1b.syms: two_file_test_1b.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(TEST_READELF) -sW $< >$@ 2>/dev/null
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@two_file_test_2.syms: two_file_test_2.o
+@GCC_TRUE@@NATIVE_LINKER_TRUE@@PLUGINS_TRUE@	$(TEST_READELF) -sW $< >$@ 2>/dev/null
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
diff --git a/gold/testsuite/plugin_test.c b/gold/testsuite/plugin_test.c
new file mode 100644
index 0000000..c60c7a1
--- /dev/null
+++ b/gold/testsuite/plugin_test.c
@@ -0,0 +1,427 @@
+/* test_plugin.c -- simple linker plugin test
+
+   Copyright 2008 Free Software Foundation, Inc.
+   Written by Cary Coutant <ccoutant@google.com>.
+
+   This file is part of gold.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "plugin-api.h"
+
+struct claimed_file
+{
+  const char* name;
+  void* handle;
+  int nsyms;
+  struct ld_plugin_symbol* syms;
+  struct claimed_file* next;
+};
+
+static struct claimed_file* first_claimed_file = NULL;
+static struct claimed_file* last_claimed_file = NULL;
+
+static ld_plugin_register_claim_file register_claim_file_hook = NULL;
+static ld_plugin_register_all_symbols_read register_all_symbols_read_hook = NULL;
+static ld_plugin_register_cleanup register_cleanup_hook = NULL;
+static ld_plugin_add_symbols add_symbols = NULL;
+static ld_plugin_get_symbols get_symbols = NULL;
+static ld_plugin_add_input_file add_input_file = NULL;
+static ld_plugin_message message = NULL;
+
+#define MAXOPTS 10
+
+static const char *opts[MAXOPTS];
+static int nopts = 0;
+
+enum ld_plugin_status onload(struct ld_plugin_tv *tv);
+enum ld_plugin_status claim_file_hook(const struct ld_plugin_input_file *file,
+                                      int *claimed);
+enum ld_plugin_status all_symbols_read_hook(void);
+enum ld_plugin_status cleanup_hook(void);
+
+enum ld_plugin_status
+onload(struct ld_plugin_tv *tv)
+{
+  struct ld_plugin_tv *entry;
+  int api_version = 0;
+  int gold_version = 0;
+  int i;
+
+  for (entry = tv; entry->tv_tag != LDPT_NULL; ++entry)
+    {
+      switch (entry->tv_tag)
+        {
+        case LDPT_API_VERSION:
+          api_version = entry->tv_u.tv_val;
+          break;
+        case LDPT_GOLD_VERSION:
+          gold_version = entry->tv_u.tv_val;
+          break;
+        case LDPT_LINKER_OUTPUT:
+          break;
+        case LDPT_OPTION:
+          if (nopts < MAXOPTS)
+            opts[nopts++] = entry->tv_u.tv_string;
+          break;
+        case LDPT_REGISTER_CLAIM_FILE_HOOK:
+          register_claim_file_hook = entry->tv_u.tv_register_claim_file;
+          break;
+        case LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK:
+          register_all_symbols_read_hook =
+            entry->tv_u.tv_register_all_symbols_read;
+          break;
+        case LDPT_REGISTER_CLEANUP_HOOK:
+          register_cleanup_hook = entry->tv_u.tv_register_cleanup;
+          break;
+        case LDPT_ADD_SYMBOLS:
+          add_symbols = entry->tv_u.tv_add_symbols;
+          break;
+        case LDPT_GET_SYMBOLS:
+          get_symbols = entry->tv_u.tv_get_symbols;
+          break;
+        case LDPT_ADD_INPUT_FILE:
+          add_input_file = entry->tv_u.tv_add_input_file;
+          break;
+        case LDPT_MESSAGE:
+          message = entry->tv_u.tv_message;
+          break;
+        default:
+          break;
+        }
+    }
+
+  if (message == NULL)
+    {
+      fprintf(stderr, "tv_message interface missing\n");
+      return LDPS_ERR;
+    }
+
+  if (register_claim_file_hook == NULL)
+    {
+      fprintf(stderr, "tv_register_claim_file_hook interface missing\n");
+      return LDPS_ERR;
+    }
+
+  if (register_all_symbols_read_hook == NULL)
+    {
+      fprintf(stderr, "tv_register_all_symbols_read_hook interface missing\n");
+      return LDPS_ERR;
+    }
+
+  if (register_cleanup_hook == NULL)
+    {
+      fprintf(stderr, "tv_register_cleanup_hook interface missing\n");
+      return LDPS_ERR;
+    }
+
+  (*message)(LDPL_INFO, "API version:   %d", api_version);
+  (*message)(LDPL_INFO, "gold version:  %d", gold_version);
+
+  for (i = 0; i < nopts; ++i)
+    (*message)(LDPL_INFO, "option: %s", opts[i]);
+
+  if ((*register_claim_file_hook)(claim_file_hook) != LDPS_OK)
+    {
+      (*message)(LDPL_ERROR, "error registering claim file hook");
+      return LDPS_ERR;
+    }
+
+  if ((*register_all_symbols_read_hook)(all_symbols_read_hook) != LDPS_OK)
+    {
+      (*message)(LDPL_ERROR, "error registering all symbols read hook");
+      return LDPS_ERR;
+    }
+
+  if ((*register_cleanup_hook)(cleanup_hook) != LDPS_OK)
+    {
+      (*message)(LDPL_ERROR, "error registering cleanup hook");
+      return LDPS_ERR;
+    }
+
+  return LDPS_OK;
+}
+
+enum ld_plugin_status
+claim_file_hook (const struct ld_plugin_input_file* file, int* claimed)
+{
+  int len;
+  char buf[160];
+  struct claimed_file* claimed_file;
+  struct ld_plugin_symbol* syms;
+  int nsyms = 0;
+  int maxsyms = 0;
+  FILE* irfile;
+  char *p;
+  char *pbind;
+  char *pvis;
+  char *psect;
+  int weak;
+  int def;
+  int vis;
+  int size;
+  char* name;
+  int is_comdat;
+  int i;
+
+  (*message)(LDPL_INFO,
+             "%s: claim file hook called (offset = %ld, size = %ld)",
+             file->name, (long)file->offset, (long)file->filesize);
+
+  /* Look for the beginning of output from readelf -s.  */
+  irfile = fdopen(file->fd, "r");
+  (void)fseek(irfile, file->offset, SEEK_SET);
+  len = fread(buf, 1, 13, irfile);
+  if (len < 13 || strncmp(buf, "\nSymbol table", 13) != 0)
+    return LDPS_OK;
+
+  /* Skip the two header lines.  */
+  (void) fgets(buf, sizeof(buf), irfile);
+  (void) fgets(buf, sizeof(buf), irfile);
+
+  if (add_symbols == NULL)
+    {
+      fprintf(stderr, "tv_add_symbols interface missing\n");
+      return LDPS_ERR;
+    }
+
+  /* Parse the output from readelf. The columns are:
+     Index Value Size Type Binding Visibility Section Name.  */
+  syms = (struct ld_plugin_symbol*)malloc(sizeof(struct ld_plugin_symbol) * 8);
+  if (syms == NULL)
+    return LDPS_ERR;
+  maxsyms = 8;
+  while (fgets(buf, sizeof(buf), irfile) != NULL)
+    {
+      p = buf;
+      p += strspn(p, " ");
+
+      /* Index field.  */
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Value field.  */
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Size field.  */
+      size = atoi(p);
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Type field.  */
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Binding field.  */
+      pbind = p;
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Visibility field.  */
+      pvis = p;
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Section field.  */
+      psect = p;
+      p += strcspn(p, " ");
+      p += strspn(p, " ");
+
+      /* Name field.  */
+      /* FIXME:  Look for version.  */
+      len = strlen(p);
+      if (p[len-1] == '\n')
+        p[--len] = '\0';
+      name = malloc(len + 1);
+      strncpy(name, p, len + 1);
+
+      /* Ignore local symbols.  */
+      if (strncmp(pbind, "LOCAL", 5) == 0)
+        continue;
+
+      weak = strncmp(pbind, "WEAK", 4) == 0;
+      if (strncmp(psect, "UND", 3) == 0)
+        def = weak ? LDPK_WEAKUNDEF : LDPK_UNDEF;
+      else if (strncmp(psect, "COM", 3) == 0)
+        def = LDPK_COMMON;
+      else
+        def = weak ? LDPK_WEAKDEF : LDPK_DEF;
+
+      if (strncmp(pvis, "INTERNAL", 8) == 0)
+        vis = LDPV_INTERNAL;
+      else if (strncmp(pvis, "HIDDEN", 6) == 0)
+        vis = LDPV_HIDDEN;
+      else if (strncmp(pvis, "PROTECTED", 9) == 0)
+        vis = LDPV_PROTECTED;
+      else
+        vis = LDPV_DEFAULT;
+
+      /* If the symbol is listed in the options list, special-case
+         it as a comdat symbol.  */
+      is_comdat = 0;
+      for (i = 0; i < nopts; ++i)
+        {
+          if (name != NULL && strcmp(name, opts[i]) == 0)
+            {
+              is_comdat = 1;
+              break;
+            }
+        }
+
+      if (nsyms >= maxsyms)
+        {
+          syms = (struct ld_plugin_symbol*)
+            realloc(syms, sizeof(struct ld_plugin_symbol) * maxsyms * 2);
+          if (syms == NULL)
+            return LDPS_ERR;
+          maxsyms *= 2;
+        }
+
+      syms[nsyms].name = name;
+      syms[nsyms].version = NULL;
+      syms[nsyms].def = def;
+      syms[nsyms].visibility = vis;
+      syms[nsyms].size = size;
+      syms[nsyms].comdat_key = is_comdat ? name : NULL;
+      syms[nsyms].resolution = LDPR_UNKNOWN;
+      ++nsyms;
+    }
+
+  claimed_file = (struct claimed_file*) malloc(sizeof(struct claimed_file));
+  if (claimed_file == NULL)
+    return LDPS_ERR;
+
+  claimed_file->name = file->name;
+  claimed_file->handle = file->handle;
+  claimed_file->nsyms = nsyms;
+  claimed_file->syms = syms;
+  claimed_file->next = NULL;
+  if (last_claimed_file == NULL)
+    first_claimed_file = claimed_file;
+  else
+    last_claimed_file->next = claimed_file;
+  last_claimed_file = claimed_file;
+
+  (*add_symbols)(file->handle, nsyms, syms);
+
+  *claimed = 1;
+  return LDPS_OK;
+}
+
+enum ld_plugin_status
+all_symbols_read_hook(void)
+{
+  int i;
+  const char* res;
+  struct claimed_file* claimed_file;
+  char buf[160];
+  char *p;
+
+  (*message)(LDPL_INFO, "all symbols read hook called");
+
+  if (get_symbols == NULL)
+    {
+      fprintf(stderr, "tv_get_symbols interface missing\n");
+      return LDPS_ERR;
+    }
+
+  for (claimed_file = first_claimed_file;
+       claimed_file != NULL;
+       claimed_file = claimed_file->next)
+    {
+      (*get_symbols)(claimed_file->handle, claimed_file->nsyms,
+                     claimed_file->syms);
+      for (i = 0; i < claimed_file->nsyms; ++i)
+        {
+          switch (claimed_file->syms[i].resolution)
+            {
+            case LDPR_UNKNOWN:
+              res = "UNKNOWN";
+              break;
+            case LDPR_UNDEF:
+              res = "UNDEF";
+              break;
+            case LDPR_PREVAILING_DEF:
+              res = "PREVAILING_DEF_REG";
+              break;
+            case LDPR_PREVAILING_DEF_IRONLY:
+              res = "PREVAILING_DEF_IRONLY";
+              break;
+            case LDPR_PREEMPTED_REG:
+              res = "PREEMPTED_REG";
+              break;
+            case LDPR_PREEMPTED_IR:
+              res = "PREEMPTED_IR";
+              break;
+            case LDPR_RESOLVED_IR:
+              res = "RESOLVED_IR";
+              break;
+            case LDPR_RESOLVED_EXEC:
+              res = "RESOLVED_EXEC";
+              break;
+            case LDPR_RESOLVED_DYN:
+              res = "RESOLVED_DYN";
+              break;
+            default:
+              res = "?";
+              break;
+            }
+          (*message)(LDPL_INFO, "%s: %s: %s", claimed_file->name,
+                     claimed_file->syms[i].name, res);
+        }
+    }
+
+  if (add_input_file == NULL)
+    {
+      fprintf(stderr, "tv_add_input_file interface missing\n");
+      return LDPS_ERR;
+    }
+
+  for (claimed_file = first_claimed_file;
+       claimed_file != NULL;
+       claimed_file = claimed_file->next)
+    {
+      if (strlen(claimed_file->name) >= sizeof(buf))
+        {
+          (*message)(LDPL_FATAL, "%s: filename too long", claimed_file->name);
+          return LDPS_ERR;
+        }
+      strcpy(buf, claimed_file->name);
+      p = strrchr(buf, '.');
+      if (p == NULL || strcmp(p, ".syms") != 0)
+        {
+          (*message)(LDPL_FATAL, "%s: filename must have '.syms' suffix",
+                     claimed_file->name);
+          return LDPS_ERR;
+        }
+      p[1] = 'o';
+      p[2] = '\0';
+      (*add_input_file)(buf);
+    }
+
+  return LDPS_OK;
+}
+
+enum ld_plugin_status
+cleanup_hook(void)
+{
+  (*message)(LDPL_INFO, "cleanup hook called");
+  return LDPS_OK;
+}
diff --git a/gold/testsuite/plugin_test_1.sh b/gold/testsuite/plugin_test_1.sh
new file mode 100755
index 0000000..5e16139
--- /dev/null
+++ b/gold/testsuite/plugin_test_1.sh
@@ -0,0 +1,56 @@
+#!/bin/sh
+
+# plugin_test_1.sh -- a test case for the plugin API.
+
+# Copyright 2008 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@google.com>.
+
+# This file is part of gold.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# This file goes with plugin_test_1.c, a simple plug-in library that
+# exercises the basic interfaces and prints out version numbers and
+# options passed to the plugin.
+
+check()
+{
+    if ! grep -q "$2" "$1"
+    then
+	echo "Did not find expected output in $1:"
+	echo "   $2"
+	echo ""
+	echo "Actual output below:"
+	cat "$1"
+	exit 1
+    fi
+}
+
+check plugin_test_1.err "API version:"
+check plugin_test_1.err "gold version:"
+check plugin_test_1.err "option: _Z4f13iv"
+check plugin_test_1.err "two_file_test_main.o: claim file hook called"
+check plugin_test_1.err "two_file_test_1.syms: claim file hook called"
+check plugin_test_1.err "two_file_test_1b.syms: claim file hook called"
+check plugin_test_1.err "two_file_test_2.syms: claim file hook called"
+check plugin_test_1.err "two_file_test_1.syms: _Z4f13iv: PREVAILING_DEF_IRONLY"
+check plugin_test_1.err "two_file_test_1.syms: _Z2t2v: PREVAILING_DEF_REG"
+check plugin_test_1.err "two_file_test_1.syms: v2: RESOLVED_IR"
+check plugin_test_1.err "two_file_test_1.syms: t17data: RESOLVED_IR"
+check plugin_test_1.err "two_file_test_2.syms: _Z4f13iv: PREEMPTED_IR"
+check plugin_test_1.err "cleanup hook called"
+
+exit 0
diff --git a/gold/testsuite/plugin_test_2.sh b/gold/testsuite/plugin_test_2.sh
new file mode 100755
index 0000000..41865ac
--- /dev/null
+++ b/gold/testsuite/plugin_test_2.sh
@@ -0,0 +1,54 @@
+#!/bin/sh
+
+# plugin_test_2.sh -- a test case for the plugin API.
+
+# Copyright 2008 Free Software Foundation, Inc.
+# Written by Cary Coutant <ccoutant@google.com>.
+
+# This file is part of gold.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# This file goes with plugin_test_1.c, a simple plug-in library that
+# exercises the basic interfaces and prints out version numbers and
+# options passed to the plugin.
+
+check()
+{
+    if ! grep -q "$2" "$1"
+    then
+	echo "Did not find expected output in $1:"
+	echo "   $2"
+	echo ""
+	echo "Actual output below:"
+	cat "$1"
+	exit 1
+    fi
+}
+
+check plugin_test_2.err "API version:"
+check plugin_test_2.err "gold version:"
+check plugin_test_2.err "two_file_test_main.o: claim file hook called"
+check plugin_test_2.err "two_file_test_1.syms: claim file hook called"
+check plugin_test_2.err "two_file_test_1b.syms: claim file hook called"
+check plugin_test_2.err "two_file_shared_2.so: claim file hook called"
+check plugin_test_2.err "two_file_test_1.syms: _Z4f13iv: PREVAILING_DEF_REG"
+check plugin_test_2.err "two_file_test_1.syms: _Z2t2v: PREVAILING_DEF_REG"
+check plugin_test_2.err "two_file_test_1.syms: v2: RESOLVED_DYN"
+check plugin_test_2.err "two_file_test_1.syms: t17data: RESOLVED_DYN"
+check plugin_test_2.err "cleanup hook called"
+
+exit 0
diff --git a/gold/testsuite/thin_archive_main.cc b/gold/testsuite/thin_archive_main.cc
new file mode 100644
index 0000000..6c38715
--- /dev/null
+++ b/gold/testsuite/thin_archive_main.cc
@@ -0,0 +1,39 @@
+// thin_archive_main.cc -- a test case for gold
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This is the main program for the thin archive tests. It calls a single
+// routine, t1, defined in libthin1.a or libthin3.a, which then references
+// other routines in the same and other libraries, to make sure that all
+// archive members are linked properly.
+
+#include <cassert>
+
+extern int t1();
+
+// Main function.  Call the test function.
+
+int
+main()
+{
+  assert(t1() == 0x4321);
+  return 0;
+}
diff --git a/gold/testsuite/thin_archive_test_1.cc b/gold/testsuite/thin_archive_test_1.cc
new file mode 100644
index 0000000..db23937
--- /dev/null
+++ b/gold/testsuite/thin_archive_test_1.cc
@@ -0,0 +1,37 @@
+// thin_archive_test_1.cc -- part of a test case for thin archives
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This tests references between files and archives.  This is file 1 of 4.
+// Each of the first three files contains a reference to the next.
+// We test the archives as follows:
+
+// Files 1 and 2 in libthin1.a, files 3 and 4 in libthin2.a.
+// Files 1 and 4 in libthin3.a, files 2 and 3 in libthin4.a, with
+// libthin3.a and libthin4.a nested inside libthinall.a.
+
+extern int t2();
+
+int
+t1()
+{
+  return (t2() << 4) | 1;
+}
diff --git a/gold/testsuite/thin_archive_test_2.cc b/gold/testsuite/thin_archive_test_2.cc
new file mode 100644
index 0000000..2c1ee31
--- /dev/null
+++ b/gold/testsuite/thin_archive_test_2.cc
@@ -0,0 +1,37 @@
+// thin_archive_test_2.cc -- part of a test case for thin archives
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This tests references between files and archives.  This is file 2 of 4.
+// Each of the first three files contains a reference to the next.
+// We test the archives as follows:
+
+// Files 1 and 2 in libthin1.a, files 3 and 4 in libthin2.a.
+// Files 1 and 4 in libthin3.a, files 2 and 3 in libthin4.a, with
+// libthin3.a and libthin4.a nested inside libthinall.a.
+
+extern int t3();
+
+int
+t2()
+{
+  return (t3() << 4) | 2;
+}
diff --git a/gold/testsuite/thin_archive_test_3.cc b/gold/testsuite/thin_archive_test_3.cc
new file mode 100644
index 0000000..b58c59f
--- /dev/null
+++ b/gold/testsuite/thin_archive_test_3.cc
@@ -0,0 +1,37 @@
+// thin_archive_test_3.cc -- part of a test case for thin archives
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This tests references between files and archives.  This is file 3 of 4.
+// Each of the first three files contains a reference to the next.
+// We test the archives as follows:
+
+// Files 1 and 2 in libthin1.a, files 3 and 4 in libthin2.a.
+// Files 1 and 4 in libthin3.a, files 2 and 3 in libthin4.a, with
+// libthin3.a and libthin4.a nested inside libthinall.a.
+
+extern int t4();
+
+int
+t3()
+{
+  return (t4() << 4) | 3;
+}
diff --git a/gold/testsuite/thin_archive_test_4.cc b/gold/testsuite/thin_archive_test_4.cc
new file mode 100644
index 0000000..1b67c94
--- /dev/null
+++ b/gold/testsuite/thin_archive_test_4.cc
@@ -0,0 +1,35 @@
+// thin_archive_test_4.cc -- part of a test case for thin archives
+
+// Copyright 2008 Free Software Foundation, Inc.
+// Written by Cary Coutant <ccoutant@google.com>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+// This tests references between files and archives.  This is file 4 of 4.
+// Each of the first three files contains a reference to the next.
+// We test the archives as follows:
+
+// Files 1 and 2 in libthin1.a, files 3 and 4 in libthin2.a.
+// Files 1 and 4 in libthin3.a, files 2 and 3 in libthin4.a, with
+// libthin3.a and libthin4.a nested inside libthinall.a.
+
+int
+t4()
+{
+  return 4;
+}
diff --git a/gold/x86_64.cc b/gold/x86_64.cc
index 2daa9bf..69f76a0 100644
--- a/gold/x86_64.cc
+++ b/gold/x86_64.cc
@@ -139,7 +139,7 @@ class Target_x86_64 : public Sized_target<64, false>
 
   // Return whether SYM is defined by the ABI.
   bool
-  do_is_defined_by_abi(Symbol* sym) const
+  do_is_defined_by_abi(const Symbol* sym) const
   { return strcmp(sym->name(), "__tls_get_addr") == 0; }
 
   // Return the size of the GOT section.
@@ -330,7 +330,7 @@ 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.
+  // Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
   void
   define_tls_base_symbol(Symbol_table*, Layout*);
 
@@ -796,7 +796,7 @@ 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.
+// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
 
 void
 Target_x86_64::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
@@ -807,12 +807,16 @@ Target_x86_64::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
   Output_segment* tls_segment = layout->tls_segment();
   if (tls_segment != NULL)
     {
+      bool is_exec = parameters->options().output_is_executable();
       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);
+				       (is_exec
+					? Symbol::SEGMENT_END
+					: Symbol::SEGMENT_START),
+				       true);
     }
   this->tls_base_symbol_defined_ = true;
 }