[IRIX] eliminate deprecated_insert_raw_breakpoint uses

The IRIX support wants to set a breakpoint to be hit when the startup
phase is complete, which is where shared libraries have been mapped
in.  AFAIU, for most IRIX ports, that location is the entry point.

For MIPS IRIX however, GDB needs to set a breakpoint earlier, in
__dbx_link, as explained by:

 #ifdef SYS_syssgi
   /* On mips-irix, we need to stop the inferior early enough during
      the startup phase in order to be able to load the shared library
      symbols and insert the breakpoints that are located in these shared
      libraries.  Stopping at the program entry point is not good enough
      because the -init code is executed before the execution reaches
      that point.

      So what we need to do is to insert a breakpoint in the runtime
      loader (rld), more precisely in __dbx_link().  This procedure is
      called by rld once all shared libraries have been mapped, but before
      the -init code is executed.  Unfortuantely, this is not straightforward,
      as rld is not part of the executable we are running, and thus we need
      the inferior to run until rld itself has been mapped in memory.

      For this, we trace all syssgi() syscall exit events.  Each time
      we detect such an event, we iterate over each text memory maps,
      get its associated fd, and scan the symbol table for __dbx_link().
      When found, we know that rld has been mapped, and that we can insert
      the breakpoint at the symbol address.  Once the dbx_link() breakpoint
      has been inserted, the syssgi() notifications are no longer necessary,
      so they should be canceled.  */
   proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0);
 #endif

The loop in irix_solib_create_inferior_hook then runs until whichever
breakpoint is hit first, the one set by solib-irix.c or the one set by
procfs.c.

Note the comment in disable_break talks about __dbx_init, but I think
that's a typo for __dbx_link:

 -  /* Note that it is possible that we have stopped at a location that
 -     is different from the location where we inserted our breakpoint.
 -     On mips-irix, we can actually land in __dbx_init(), so we should
 -     not check the PC against our breakpoint address here.  See procfs.c
 -     for more details.  */

This looks very much like referring to the loop in
irix_solib_create_inferior_hook stopping at __dbx_link instead of at
the entry point.

What this patch does is convert these deprecated raw breakpoints to
standard solib_event breakpoints.  When the first solib-event
breakpoint is hit, we delete all solib-event breakpoints.  We do that
in the so_ops->handle_event hook.

This allows getting rid of the loop in irix_solib_create_inferior_hook
completely, which should allow properly handling signals and other
events in the early startup phase, like in SVR4.

Built on x86_64 Fedora 20 with --enable-targets=all (builds
solib-irix.c).

Joel tested that with an earlier version of this patch "info shared"
after starting a program gave the same list of shared libraries as
before.

gdb/ChangeLog:
2014-09-12  Pedro Alves  <palves@redhat.com>

	* breakpoint.c (remove_solib_event_breakpoints_at_next_stop)
	(create_and_insert_solib_event_breakpoint): New functions.
	* breakpoint.h (create_and_insert_solib_event_breakpoint)
	(remove_solib_event_breakpoints_at_next_stop): New declarations.
	* procfs.c (dbx_link_bpt_addr, dbx_link_bpt): Delete globals.
	(remove_dbx_link_breakpoint): Delete function.
	(insert_dbx_link_bpt_in_file): Use
	create_and_insert_solib_event_breakpoint instead of
	deprecated_insert_raw_breakpoint.
	(procfs_wait): Don't check whether we hit __dbx_link here.
	(procfs_mourn_inferior): Don't delete the __dbx_link breakpoint
	here.
	* solib-irix.c (base_breakpoint): Delete global.
	(disable_break): Delete function.
	(enable_break): Use create_solib_event_breakpoint
	instead of deprecated_insert_raw_breakpoint.
	(irix_solib_handle_event): New function.
	(irix_solib_create_inferior_hook): Don't run the target or disable
	the mapping-complete breakpoint here.
	(_initialize_irix_solib): Install irix_solib_handle_event as
	so_ops->handle_event hook.
after gdb_run_cmd, gdb_expect -> gdb_test_multiple/gdb_test

See:
  https://sourceware.org/ml/gdb-patches/2014-09/msg00404.html

We have a number of places that do gdb_run_cmd followed by gdb_expect,
when it would be better to use gdb_test_multiple or gdb_test.

This converts all that "grep gdb_run_cmd -A 2 | grep gdb_expect"
found.

Tested on x86_64 Fedora 20, native and gdbserver.

gdb/testsuite/
2014-09-12  Pedro Alves  <palves@redhat.com>

	* gdb.arch/gdb1558.exp: Replace uses of gdb_expect after
	gdb_run_cmd with gdb_test_multiple or gdb_test throughout.
	* gdb.arch/i386-size-overlap.exp: Likewise.
	* gdb.arch/i386-size.exp: Likewise.
	* gdb.arch/i386-unwind.exp: Likewise.
	* gdb.base/a2-run.exp: Likewise.
	* gdb.base/break.exp: Likewise.
	* gdb.base/charset.exp: Likewise.
	* gdb.base/chng-syms.exp: Likewise.
	* gdb.base/commands.exp: Likewise.
	* gdb.base/dbx.exp: Likewise.
	* gdb.base/find.exp: Likewise.
	* gdb.base/funcargs.exp: Likewise.
	* gdb.base/jit-simple.exp: Likewise.
	* gdb.base/reread.exp: Likewise.
	* gdb.base/sepdebug.exp: Likewise.
	* gdb.base/step-bt.exp: Likewise.
	* gdb.cp/mb-inline.exp: Likewise.
	* gdb.cp/mb-templates.exp: Likewise.
	* gdb.objc/basicclass.exp: Likewise.
	* gdb.threads/killed.exp: Likewise.
daily update
Fix some ChangeLog typos
Pass plain-text prompt to with_gdb_prompt.

I had occasion to use with_gdb_prompt in a test for the patch for PR 17314
and was passing the plain text prompt as the value, "(top-gdb)",
instead of a regexp, "\(top-gdb\)" (expressed as "\\(top-gdb\\)" in TCL).

I then discovered that in order to restore the prompt gdb passes the
original value of $gdb_prompt to "set prompt", which works because
"set prompt \(gdb\) " is equivalent to "set prompt (gdb) ".
Perhaps I'm being overly cautious but this feels a bit subtle,
but at any rate as an API choice I'd much rather pass the plain text
form to with_gdb_prompt.

I also discovered that the initial value of gdb_prompt is set in
two places to two different values.
At the global level gdb.exp sets it to "\[(\]gdb\[)\]"
and default_gdb_init sets it to "\\(gdb\\)".
The former form is undesirable as an argument to "set prompt",
but it's not clear to me that just deleting this code won't break
anything.  Thus I just changed the value to be consistent and added
a comment.

gdb/testsuite/ChangeLog:

	* lib/gdb.exp (gdb_prompt): Add comment and change initial value to
	be consistent with what default_gdb_init uses.
	(with_gdb_prompt): Change form of PROMPT argument from a regexp to
	the plain text of the prompt.  Add some logging printfs.
	* gdb.perf/disassemble.exp: Update call to with_gdb_prompt.
	* linux-nat.c (wait_lwp): Add debugging printf.
	(linux_nat_wait_1): Ditto.
daily update
New command queue-signal.

If I want to change the signalled state of multiple threads
it's a bit cumbersome to do with the "signal" command.
What you really want is a way to set the signal state of the
desired threads and then just do "continue".

This patch adds a new command, queue-signal, to accomplish this.
Basically "signal N" == "queue-signal N" + "continue".
That's not precisely true in that "signal" can be used to inject
any signal, including signals set to "nopass"; whereas "queue-signal"
just queues the signal as if the thread stopped because of it.
"nopass" handling is done when the thread is resumed which
"queue-signal" doesn't do.

One could add extra complexity to allow queue-signal to be used to
deliver "nopass" signals like the "signal" command.  I have no current
need for it so in the interests of incremental complexity, I have
left such support out and just have the code flag an error if one
tries to queue a nopass signal.

gdb/ChangeLog:

	* NEWS: Mention new "queue-signal" command.
	* infcmd.c (queue_signal_command): New function.
	(_initialize_infcmd): Add new queue-signal command.

gdb/doc/ChangeLog:

	* gdb.texinfo (Signaling): Document new queue-signal command.

gdb/testsuite/ChangeLog:

	* gdb.threads/queue-signal.c: New file.
	* gdb.threads/queue-signal.exp: New file.
Fix set up of queue-signal.exp test.

The test does a backtrace to see which thread (#2 or #3) is assigned
to which SIGUSR (1 or 2).  If the main thread gets to all_threads_running
before the sigusr threads get to their entry point, then the function
name isn't in the backtrace and the test fails.

Alas this version of the code is within epsilon of what I started with,
and then over-simplified things.
daily update
Ensure softfloat and singlefloat take precedence in consistency checks

gas/

	* tc-mips.c (check_fpabi): Move softfloat and singlefloat
	checks higher.

gas/testsuite/

	* gas/mips/attr-gnu-4-5-msingle-float.l: New file.
	* gas/mips/attr-gnu-4-5-msingle-float.s: Likewise.
	* gas/mips/attr-gnu-4-5-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-5-msoft-float.s: Likewise.
	* gas/mips/attr-gnu-4-6-msingle-float.l: Update expected output.
	* gas/mips/attr-gnu-4-6-msoft-float.l: Likewise.
	* gas/mips/attr-gnu-4-7-msingle-float.l: Likewise.
	* gas/mips/attr-gnu-4-7-msoft-float.l: Likewise.
	* gas/mips/mips.exp: Update expected output for FP ABI 5,6,7.
Add support for MIPS R6.

bfd/
 	* aoutx.h (NAME (aout, machine_type)): Add mips32r6 and mips64r6.
 	* archures.c (bfd_architecture): Likewise.
 	* bfd-in2.h (bfd_architecture): Likewise.
 	(bfd_reloc_code_real): Add relocs BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3 and
 	BFD_RELOC_MIPS_19_PCREL_S2.
 	* cpu-mips.c (arch_info_struct): Add mips32r6 and mips64r6.
 	* elf32-mips.c: Define relocs R_MIPS_PC21_S2, R_MIPS_PC26_S2
 	R_MIPS_PC18_S3, R_MIPS_PC19_S2, R_MIPS_PCHI16 and R_MIPS_PCLO16.
 	(mips_reloc_map): Add entries for BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3,
 	BFD_RELOC_MIPS_19_PCREL_S2, BFD_RELOC_HI16_S_PCREL and
 	BFD_RELOC_LO16_PCREL.
 	* elf64-mips.c: Define REL, and RELA relocations R_MIPS_PC21_S2,
	R_MIPS_PC26_S2, R_MIPS_PC18_S3, R_MIPS_PC19_S2, R_MIPS_PCHI16
	and R_MIPS_PCLO16.
 	(mips_reloc_map): Add entries for BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3,
 	BFD_RELOC_MIPS_19_PCREL_S2, BFD_RELOC_HI16_S_PCREL and
 	BFD_RELOC_LO16_PCREL.
 	* elfn32-mips.c: Likewise.
 	* elfxx-mips.c (MIPSR6_P): New define.
 	(mipsr6_exec_plt_entry): New array.
	(hi16_reloc_p): Add support for R_MIPS_PCHI16.
	(lo16_reloc_p): Add support for R_MIPS_PCLO16.
 	(aligned_pcrel_reloc_p): New function.
 	(mips_elf_relocation_needs_la25_stub): Add support for relocs:
 	R_MIPS_PC21_S2 and R_MIPS_PC26_S2.
 	(mips_elf_calculate_relocation): Add support for relocs:
 	R_MIPS_PC21_S2, R_MIPS_PC26_S2, R_MIPS_PC18_S3, R_MIPS_PC19_S2,
 	R_MIPS_PCHI16 and R_MIPS_PCLO16.
 	(_bfd_elf_mips_mach): Add support for mips32r6 and mips64r6.
	(mips_elf_add_lo16_rel_addend): Add support for R_MIPS_PCHI16.
 	(_bfd_mips_elf_check_relocs): Add support for relocs:
	R_MIPS_PC21_S2 and R_MIPS_PC26_S2.
 	(_bfd_mips_elf_relocate_section): Add a check for unaligned
 	pc relative relocs.
 	(_bfd_mips_elf_finish_dynamic_symbol): Add support for MIPS r6
 	plt entry.
 	(mips_set_isa_flags): Add support for mips32r6 and mips64r6.
 	(_bfd_mips_elf_print_private_bfd_data): Likewise.
 	(mips_32bit_flags_p): Add support for mips32r6.
 	* libbfd.h (bfd_reloc_code_real_names): Add entries for
 	BFD_RELOC_MIPS_21_PCREL_S2, BFD_RELOC_MIPS_26_PCREL_S2,
 	BFD_RELOC_MIPS_18_PCREL_S3 and BFD_RELOC_MIPS_19_PCREL_S2.
 	* reloc.c: Document relocs BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3 and
 	BFD_RELOC_MIPS_19_PCREL_S2.

binutils/
 	* readelf.c (get_machine_flags): Add support for mips32r6 and
 	mips64r6.

elfcpp/
 	* mips.h (E_MIPS_ARCH_32R6, E_MIPS_ARCH_64R6): New enum constants.

gas/
 	* config/tc-mips.c (mips_nan2008): New static global.
	(mips_flag_nan2008): Removed.
	(LL_SC_FMT): New define.
	(COP12_FMT): Updated.
	(ISA_IS_R6): New define.
 	(ISA_HAS_64BIT_REGS): Add mips64r6.
 	(ISA_HAS_DROR): Likewise.
 	(ISA_HAS_64BIT_FPRS): Add mips32r6 and mips64r6.
 	(ISA_HAS_ROR): Likewise.
 	(ISA_HAS_ODD_SINGLE_FPR): Likewise.
 	(ISA_HAS_MXHC1): Likewise.
 	(hilo_interlocks): Likewise.
 	(md_longopts): Likewise.
	(ISA_HAS_LEGACY_NAN): New define.
 	(options): Add OPTION_MIPS32R6 and OPTION_MIPS64R6.
 	(mips_ase): Add field rem_rev.
 	(mips_ases): Updated to add which ISA an ASE was removed in.
 	(mips_isa_rev): Add support for mips32r6 and mips64r6.
 	(mips_check_isa_supports_ase): Add support to check if an ASE
 	has been removed in the specified MIPS ISA revision.
 	(validate_mips_insn): Skip '-' character.
	(macro_build): Likewise.
	(mips_check_options): Prevent R6 working with fp32, mips16,
	micromips, or branch relaxation.
	(file_mips_check_options): Set R6 floating point registers to
	64 bit.  Also deal with the nan2008 option.
 	(limited_pcrel_reloc_p): Add relocs: BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3,
 	BFD_RELOC_MIPS_19_PCREL_S2, BFD_RELOC_HI16_S_PCREL and
 	BFD_RELOC_LO16_PCREL.
 	(operand_reg_mask): Add support for OP_SAME_RS_RT, OP_CHECK_PREV
	and OP_NON_ZERO_REG.
 	(match_check_prev_operand): New static function.
 	(match_same_rs_rt_operand): New static function.
	(match_non_zero_reg_operand): New static function.
 	(match_operand): Added entries for: OP_SAME_RS_RT, OP_CHECK_PREV
	and OP_NON_ZERO_REG.
 	(insns_between): Added case to deal with forbidden slots.
 	(append_insn): Added support for relocs: BFD_RELOC_MIPS_21_PCREL_S2
 	and BFD_RELOC_MIPS_26_PCREL_S2.
 	(match_insn): Add support for operands -A, -B, +' and +".  Also
 	skip '-' character.
 	(mips_percent_op): Add entries for %pcrel_hi and %pcrel_lo.
 	(md_parse_option): Add support for mips32r6 and mips64r6.  Also
	update the nan option handling.
 	(md_pcrel_from): Add cases for relocs: BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2.
 	(mips_force_relocation): Prevent forced relaxation for MIPS r6.
 	(md_apply_fix): Add support for relocs: BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3,
 	BFD_RELOC_MIPS_19_PCREL_S2, BFD_RELOC_HI16_S_PCREL and
 	BFD_RELOC_LO16_PCREL.
 	(s_mipsset): Add support for mips32r6 and mips64r6.
	(s_nan): Update to support the new nan2008 framework.
 	(tc_gen_reloc): Add relocs: BFD_RELOC_MIPS_21_PCREL_S2,
 	BFD_RELOC_MIPS_26_PCREL_S2, BFD_RELOC_MIPS_18_PCREL_S3,
 	BFD_RELOC_MIPS_19_PCREL_S2, BFD_RELOC_HI16_S_PCREL and
 	BFD_RELOC_LO16_PCREL.
	(mips_elf_final_processing): Updated to use the mips_nan2008.
 	(mips_cpu_info_table): Add entries for mips32r6 and mips64r6.
	(macro): Enable ldc2, sdc2, ll, lld, swc2, sc, scd, cache, pref
	macros for R6.
	(mips_fix_adjustable): Make PC relative R6 relocations relative
	to the symbol and not the section.
 	* configure.ac: Add support for mips32r6 and mips64r6.
 	* configure: Regenerate.
 	* doc/c-mips.texi: Document the -mips32r6 and -mips64r6 command line
 	options.
	* doc/as.texinfo: Likewise.

gas/testsuite/
	* gas/mips/24k-triple-stores-1.s: If testing for r6 prevent
	non-supported instructions from being tested.
	* gas/mips/24k-triple-stores-2.s: Likewise.
	* gas/mips/24k-triple-stores-3.s: Likewise.
	* gas/mips/24k-triple-stores-6.s: Likewise.
	* gas/mips/beq.s: Likewise.
	* gas/mips/eva.s: Likewise.
	* gas/mips/ld-zero-3.s: Likewise.
	* gas/mips/mips32-cp2.s: Likewise.
	* gas/mips/mips32.s: Likewise.
	* gas/mips/mips4.s: Likewise.
	* gas/mips/add.s: Don't test the add instructions if r6, and
	add padding.
	* gas/mips/add.d: Check for a triple dot not a nop at the end of the
	disassembly output.
	* gas/mips/micromips@add.d: Likewise.
	* gas/mips/mipsr6@24k-branch-delay-1.d: New file.
	* gas/mips/mipsr6@24k-triple-stores-1.d: New file.
	* gas/mips/mipsr6@24k-triple-stores-2-llsc.d: New file.
	* gas/mips/mipsr6@24k-triple-stores-2.d: New file.
	* gas/mips/mipsr6@24k-triple-stores-3.d: New file.
	* gas/mips/mipsr6@24k-triple-stores-6.d: New file.
	* gas/mips/mipsr6@add.d: New file.
	* gas/mips/mipsr6@attr-gnu-4-1-msingle-float.l: New file.
	* gas/mips/mipsr6@attr-gnu-4-1-msingle-float.s: New file.
	* gas/mips/mipsr6@attr-gnu-4-1-msoft-float.l: New file.
	* gas/mips/mipsr6@attr-gnu-4-1-msoft-float.s: New file.
	* gas/mips/mipsr6@attr-gnu-4-2-mdouble-float.l: New file.
	* gas/mips/mipsr6@attr-gnu-4-2-mdouble-float.s: New file.
	* gas/mips/mipsr6@beq.d: New file.
	* gas/mips/mipsr6@bge.d: New file.
	* gas/mips/mipsr6@bgeu.d: New file.
	* gas/mips/mipsr6@blt.d: New file.
	* gas/mips/mipsr6@bltu.d: New file.
	* gas/mips/mipsr6@branch-misc-1.d: New file.
	* gas/mips/mipsr6@branch-misc-2-64.d: New file.
	* gas/mips/mipsr6@branch-misc-2pic-64.d: New file.
	* gas/mips/mipsr6@branch-misc-4-64.d: New file.
	* gas/mips/mipsr6@cache.d: New file.
	* gas/mips/mipsr6@eva.d: New file.
	* gas/mips/mipsr6@jal-svr4pic-noreorder.d: New file.
	* gas/mips/mipsr6@jal-svr4pic.d: New file.
	* gas/mips/mipsr6@ld-zero-2.d: New file.
	* gas/mips/mipsr6@ld-zero-3.d: New file.
	* gas/mips/mipsr6@loc-swap-dis.d: New file.
	* gas/mips/mipsr6@mips32-cp2.d: New file.
	* gas/mips/mipsr6@mips32-imm.d: New file.
	* gas/mips/mipsr6@mips32.d: New file.
	* gas/mips/mipsr6@mips32r2.d: New file.
	* gas/mips/mipsr6@mips4-fp.d: New file.
	* gas/mips/mipsr6@mips4-fp.l: New file.
	* gas/mips/mipsr6@mips4-fp.s: New file.
	* gas/mips/mipsr6@mips4.d: New file.
	* gas/mips/mipsr6@mips5-fp.d: New file.
	* gas/mips/mipsr6@mips5-fp.l: New file.
	* gas/mips/mipsr6@mips5-fp.s: New file.
	* gas/mips/mipsr6@mips64.d: New file.
	* gas/mips/mipsr6@msa-branch.d: New file.
	* gas/mips/mipsr6@msa.d: New file.
	* gas/mips/mipsr6@pref.d: New file.
	* gas/mips/mipsr6@relax-swap3.d: New file.
	* gas/mips/r6-64-n32.d: New file.
	* gas/mips/r6-64-n64.d: New file.
	* gas/mips/r6-64-removed.l: New file.
	* gas/mips/r6-64-removed.s: New file.
	* gas/mips/r6-64.s: New file.
	* gas/mips/r6-attr-none-double.d: New file.
	* gas/mips/r6-n32.d: New file.
	* gas/mips/r6-n64.d: New file.
	* gas/mips/r6-removed.l: New file.
	* gas/mips/r6-removed.s: New file.
	* gas/mips/r6.d: New file.
	* gas/mips/r6.s: New file.
	* gas/mips/mipsr6@mips32-dsp.d: New file.
	* gas/mips/mipsr6@mips32-dspr2.d: New file.
	* gas/mips/mipsr6@mips32r2-ill.l: New file.
	* gas/mips/mipsr6@mips32r2-ill.s: New file.
	* gas/mips/cache.s: Add r6 instruction varients.
	* gas/mips/mips.exp: Add support for the mips32r6 and mips64r6
	architectures.  Also prevent non r6 supported tests from running.
	Finally, add in support for running the new r6 tests.
	(run_dump_test_arch): Add support for mipsr6 tests.
	(run_list_test_arch): Add support for using files of the
	form arch@testname.l .

include/elf/
 	* mips.h: Add relocs: R_MIPS_PC21_S2, R_MIPS_PC26_S2, R_MIPS_PC18_S3,
 	R_MIPS_PC19_S2, R_MIPS_PCHI16 and R_MIPS_PCLO16.
 	(E_MIPS_ARCH_32R6): New define.
 	(E_MIPS_ARCH_64R6): New define.

include/opcode/
 	* mips.h (mips_operand_type): Add new entries: OP_SAME_RS_RT,
 	OP_CHECK_PREV and OP_NON_ZERO_REG.  Add descriptions for the MIPS R6
	instruction arguments: -a, -b, -d, -s, -t, -u, -v, -w, -x, -y, -A, -B,
	 +I, +O, +R, +:, +\, +", +;
	(mips_check_prev_operand): New struct.
 	(INSN2_FORBIDDEN_SLOT): New define.
 	(INSN_ISA32R6): New define.
 	(INSN_ISA64R6): New define.
	(INSN_UPTO32R6): New define.
	(INSN_UPTO64R6): New define.
	(mips_isa_table): Add INSN_UPTO32R6 and INSN_UPTO64R6.
 	(ISA_MIPS32R6): New define.
 	(ISA_MIPS64R6): New define.
 	(CPU_MIPS32R6): New define.
 	(CPU_MIPS64R6): New define.
 	(cpu_is_member): Add cases for CPU_MIPS32R6, and CPU_MIPS64R6.

ld/
 	* ldmain.c (get_emulation): Add support for -mips32r6 and -mips64r6.

opcodes/
 	* mips-dis.c (mips_arch_choices): Add entries for mips32r6 and
 	mips64r6.
 	(parse_mips_dis_option): Allow MSA and virtualization support for
 	mips64r6.
 	(mips_print_arg_state): Add fields dest_regno and seen_dest.
 	(mips_seen_register): New function.
 	(print_insn_arg): Refactored code to use mips_seen_register
	function.  Add support for OP_SAME_RS_RT, OP_CHECK_PREV and
	OP_NON_ZERO_REG.  Changed OP_REPEAT_DEST_REG case to print out
	the register rather than aborting.
 	(print_insn_args): Add length argument.  Add code to correctly
	calculate the instruction address for pc relative instructions.
	(validate_insn_args): New static function.
 	(print_insn_mips): Prevent jalx disassembling for r6.  Use
	validate_insn_args.
	(print_insn_micromips): Use validate_insn_args.
	all the arguments are valid.
	* mips-formats.h (PREV_CHECK): New define.
 	* mips-opc.c (decode_mips_operand): Add support for -a, -b, -d, -s,
 	-t, -u, -v, -w, -x, -y, -A, -B, +I, +O, +R, +:, +\, +", +;
 	(RD_pc): New define.
 	(FS): New define.
 	(I37): New define.
 	(I69): New define.
 	(mips_builtin_opcodes): Add MIPS R6 instructions.  Exclude recoded
 	MIPS R6 instructions from MIPS R2 instructions.