bfd/
    * elfnn-riscv.c (riscv_version_mismatch): Do not report the warning
    when the version of input or output is RISCV_UNKNOWN_VERSION, since
    the extension is added implicitly.
    * elfxx-riscv.c: Updated the obsolete comments.
    (RISCV_UNKNOWN_VERSION): Moved to elfxx-riscv.h.
    * elfxx-riscv.h (RISCV_UNKNOWN_VERSION): Added.

Fix the wrong version of i-ext when expanding g-ext.  This was changed by
the previous patch accidently.

bfd/
    * elfxx-riscv.c (riscv_parse_std_ext): Fixed the wrong versions of
    i-ext when expanding g-ext.

The linker does not care the default versions of the extensions, since
it does not have the default ISA spec setting.  Therefore, linker won't
insert the implicit extensions for the input objects.  But we used to
insert the i-ext as the explicit extension, even if the e-ext is set.
This causes linker to report "cannot find default versions of the ISA
extension `i'" errors when linking the input objects with e-ext.

This patch fixes the above linker problem, and also remove the confused
riscv_ext_dont_care_version function.  Unless these "dont care" extensions
are set in the input architecture explicitly, otherwise we always insert
them as the implicit ones.  Afterwards, let riscv_arch_str1 surpress them
not to output to the architecture string if their versions are
RISCV_UNKNOWN_VERSION.

bfd/
    * elfxx-riscv.c (riscv_ext_dont_care_version): Removed.
    (riscv_parse_add_subset): Always add the implicit extensions, even if
    their versions are RISCV_UNKNOWN_VERSION.
    (riscv_parse_std_ext): Delay to add i-ext as the implicit extension
    in the riscv_parse_add_implicit_subsets.  Besides, add g-ext as the
    implicit extension after it has been expanded.
    (riscv_parse_add_implicit_subsets): Updated.

This reverts commit 014cc7f8.
Given the problems associated with this patch and the others intended to fix the smart_rename CVE, the decision has been taken to$

This reverts commit b143e2d5.
Given the problems associated with this patch and the others intended to fix the smart_rename CVE, the decision has been taken to$

This reverts commit 95b91a04.
Given the problems associated with this patch and the others intended to fix the smart_rename CVE, the decision has been taken to$

This reverts commit c0034ac5.
Given the problems associated with this patch and the others intended to fix the smart_rename CVE, the decision has been taken to revert the patches for the 2.36.1 point release.

We can just use stat here, the same as is done in ar.c:open_inarch.

	PR 27345
	* arsup.c (ar_save): Use stat rather than lstat.

(cherry picked from commit c180f095)

bfd/
    * elfxx-riscv.c (riscv_parse_prefixed_ext): Removed zb*.
gas/
    * config/tc-riscv.c (riscv_multi_subset_supports): Removed
    INSN_CLASS_ZB*.
    * testsuite/gas/riscv/bitmanip-insns-32.d: Removed.
    * testsuite/gas/riscv/bitmanip-insns-64.d: Removed.
    * testsuite/gas/riscv/bitmanip-insns.s: Removed.
include/
    * opcode/riscv-opc.h: Removed macros for zb* extensions.
    * opcode/riscv.h (riscv_insn_class): Removed INSN_CLASS_ZB*.
opcodes/
    * riscv-opc.c (MASK_RVB_IMM): Removed.
    (riscv_opcodes): Removed zb* instructions.
    (riscv_ext_version_table): Removed versions for zb*.

commit 7d409ac0
Author: Alan Modra <amodra@gmail.com>
Date:   Thu Feb 4 13:56:34 2021 +1030

    PR27311, (symbol from plugin): undefined reference, hidden sym

fixed PR ld/15146.  Restore PR ld/15146 tests.

	PR ld/15146
	* testsuite/ld-plugin/lto.exp: Run PR ld/15146 tests.
	* testsuite/ld-plugin/pr15146.d: Restored.
	* testsuite/ld-plugin/pr15146a.c: Likewise.
	* testsuite/ld-plugin/pr15146b.c: Likewise.
	* testsuite/ld-plugin/pr15146c.c: Likewise.
	* testsuite/ld-plugin/pr15146d.c: Likewise.

(cherry picked from commit 37707bd8)

bfd/
	PR 27311
	* elflink.c (elf_link_add_object_symbols): Don't pull in as-needed
	libraries for IR references on pass over libraries after LTO
	recompilation.
ld/
	* testsuite/ld-plugin/pr27311d.c: New test.
	* testsuite/ld-plugin/lto.exp: Rename pr27311 to pr27311-1, compile
	and link new test as pr27311-2.

(cherry picked from commit 7d409ac0)

	PR 27270
	PR 27284
	PR 26945
	* ar.c: Don't include libbfd.h.
	(write_archive): Replace xmalloc+strcpy with xstrdup.  Use
	bfd_stat rather than fstat on iostream.  Move stat and fd tests
	outside of _WIN32 ifdef.  Delete skip_stat variable.
	* arsup.c (temp_name, real_ofd): New static variables.
	(ar_open): Use make_tempname and bfd_fdopenw.
	(ar_save): Adjust to suit ar_open changes.  Move stat output
	of _WIN32 ifdef.
	* objcopy.c: Don't include libbfd.h.
	(copy_file): Use bfd_stat.

(cherry picked from commit 95b91a04)

A default versioned symbol definition in a shared library is
overridden by an unversioned definition in a regular object file, and
thus should not be reason to make an as-needed library needed.

bfd/
	PR 27311
	* elflink.c (elf_link_add_object_symbols): Don't pull in as-needed
	libraries when H is an indirect symbol after calling
	_bfd_elf_add_default_symbol.
ld/
	* testsuite/ld-ifunc/ifunc.exp (libpr16467b.so, libpr16467bn.so):
	Link with --as-needed.

	* testsuite/ld-plugin/pr27311.d,
	* testsuite/ld-plugin/pr27311.ver,
	* testsuite/ld-plugin/pr27311a.c,
	* testsuite/ld-plugin/pr27311b.c,
	* testsuite/ld-plugin/pr27311c.c: New testcase.
	* testsuite/ld-plugin/lto.exp: Run it.  Correct PR14918 and
	PR12982 entries.

(cherry picked from commit 9918bff7)
(cherry picked from commit 69551367)
(cherry picked from commit f01fb44c)

This stops ld from endless looping on SHF_LINK_ORDER sh_link loops.

bfd/
	PR 27259
	* elflink.c (_bfd_elf_gc_mark_extra_sections): Use linker_mark to
	prevent endless looping of linked-to sections.
ld/
	PR 27259
	* ldelf.c (ldelf_before_place_orphans): Use linker_mark to
	prevent endless looping of linked-to sections.

(cherry picked from commit def97fb9)

bfd/
	PR 27271
	* elflink.c (bfd_elf_link_record_dynamic_symbol): Don't segfault
	on symbols defined in absolute or other special sections.
ld/
	* testsuite/ld-tic6x/tic6x.exp: Add pr27271 test.

(cherry picked from commit c4566785)

The .debug_line secton in DWARF5 has a byte for address size and a byte
for segment selector after DWARF version.  Skip them for DWARF5.

	PR gold/27246
	* dwarf_reader.cc (Sized_dwarf_line_info::read_header_prolog):
	Skip address size and segment selector for DWARF5.

(cherry picked from commit 0318cca4)

Since ld may depend on libctf (if present), and libctf may be relinked
by the installation process, libctf must be installed before ld is,
or the relink may fail if it calls on symbols or symbol versions that do
not exist in any libctf already present on the system.  (If none is
present, the copy in the build tree will be automatically used, but
if one *is* present, it may take precedence and break things.)

(This is a maybe- dependency, so it will work even if libctf is
disabled.)

ChangeLog
2021-01-26  Nick Alcock  <nick.alcock@oracle.com>

	* Makefile.def: Add install-libctf dependency to install-ld.
	* Makefile.in: Regenerated.

        PR ld/27230
        * scripttempl/DWARF.sc: Add DWARF-5 .debug_* sections.

A case of inst->next being uninitialised.

	* i386-gen.c (parse_template): Ensure entire template_instance
	is initialised.

(cherry picked from commit c3ffb8f3)

This failed on ft32, hppa, and mips-irix targets.  In the case of ft32
the problem was iterating over an array in reverse and not using the
proper condition, so BFD_RELOC_NONE was not recognised.

bfd/
	* elf32-ft32.c (ft32_reloc_type_lookup): Don't miss ft32_reloc_map[0].
gas/
	PR 27282
	* testsuite/gas/all/none.d: Replace skip with xfail, don't xfail ft32.
	* testsuite/gas/elf/pr27228.d: xfail hppa and allow OBJECT match.

(cherry picked from commit 4287950e)

	* objcopy.c (copy_main): Fix a double free happening when both
	--localize-symbols and --globalize-symbols options are invoked
	together.

(cherry picked from commit e37709f0)

GCC 11 passes --gdwarf-5 to assembler to enable DWARF5 debug info.  Don't
disable relaxation when --gdwarf-N is specified.  The assembler generated
debug information will treat the sequence of the relaxed instructions as
a single instruction.

	PR gas/27243
	* config/tc-nios2.c (md_begin): Don't disable relaxation with
	--gdwarf-N.
	* testsuite/gas/nios2/relax.d: New file.
	* testsuite/gas/nios2/relax.s: Likewise.

(cherry picked from commit 1f583bc2)

The DWARF5 spec does indeed explicitly say: "A bounded range entry whose
beginning and ending address offsets are equal (including zero) indicates
an empty range and may be ignored."

Since arange_add already ignores empty ranges, remove the whole check
which is equivalent to the check plus explicit continue.

	PR binutils/27231
	* dwarf2.c (read_rnglists): Ignore empty range when parsing line
	number tables.

(cherry picked from commit 940d0202)

	PR gas/27228
	* testsuite/gas/elf/elf.exp: Run pr27228.
	* testsuite/gas/elf/pr27228.d: New file.
	* testsuite/gas/elf/pr27228.s: Likewise.

(cherry picked from commit eea133e6)