Fix dwarf2loc.h::dwarf2_evaluate_property function description.

gdb/ChangeLog:

        * dwarf2loc.h (dwarf2_evaluate_property): Minor function
        description fix.
x86 debug address register clarifications

The loop macro ALL_DEBUG_REGISTERS does not iterate over the status or
control registers, so its name is misleading.  This commit renames it
as ALL_DEBUG_ADDRESS_REGISTERS and updates all uses.  This commit also
updates its loop conditions to an equivalent but better form, and
makes two functions use it that had previously hardwired the loop.
A comment on a related field in the x86_debug_reg_state structure is
also updated to reflect that the field refers specifically to address
registers only.

gdb/ChangeLog:

	* nat/x86-dregs.h (ALL_DEBUG_REGISTERS): Renamed as...
	(ALL_DEBUG_ADDRESS_REGISTERS): New macro.  All uses updated.
	Loop conditions	changed to equivalent form.
	(struct x86_debug_reg_state): Updated dr_ref_count comment.
	* x86-linux-nat.c (x86_linux_prepare_to_resume): Use
	ALL_DEBUG_ADDRESS_REGISTERS.

gdb/gdbserver/ChangeLog:

	* linux-x86-low.c (x86_linux_prepare_to_resume): Use
	ALL_DEBUG_ADDRESS_REGISTERS.
[PATCH/AArch64] Implement LSE feature

2014-09-03  Jiong Wang  <jiong.wang@arm.com>

  gas/
	* config/tc-aarch64.c (parse_operands): Recognize PAIRREG.
	(aarch64_features): Add entry for lse extension.

  include/opcode/
	* aarch64.h (AARCH64_FEATURE_LSE): New feature added.
	(aarch64_opnd): Add AARCH64_OPND_PAIRREG.
	(aarch64_insn_class): Add lse_atomic.
	(F_LSE_SZ): New field added.
	(opcode_has_special_coder): Recognize F_LSE_SZ.

  opcode/
	* aarch64-tbl.h (QL_R4NIL): New qualifiers.
	(aarch64_feature_lse): New feature added.
	(LSE): New Added.
	(aarch64_opcode_table): New LSE instructions added.  Improve
	descriptions for ldarb/ldarh/ldar.
	(aarch64_opcode_table): Describe PAIRREG.
	* aarch64-opc.h (aarch64_field_kind): Add FLD_lse_sz.
	* aarch64-opc.c (fields): Add entry for F_LSE_SZ.
	(aarch64_print_operand): Recognize PAIRREG.
	(operand_general_constraint_met_p): Check reg pair constraints for CASP
	instructions.
	* aarch64-dis.c (aarch64_ext_regno_pair): New extractor for paired reg.
	(do_special_decoding): Recognize F_LSE_SZ.
	* aarch64-asm.c (do_special_encoding): Recognize F_LSE_SZ.

  gas/testsuite/
	* gas/aarch64/lse-atomic.d: New.
	* gas/aarch64/lse-atomic.s: Likewise.
	* gas/aarch64/illegal-lse.d: Likewise.
	* gas/aarch64/illegal-lse.l: Likewise.
	* gas/aarch64/illegal-lse.s: Likewise.
	* gas/aarch64/diagnostic.s: Check processor feature detect for lse
	instruction.
	* gas/aarch64/diagnostic.l: Likewise.
[PATCH/AArch64] Generic support for all system registers using mrs and msr

  2014-09-03  Jiong Wang  <jiong.wang@arm.com>

  opcode/
    * aarch64-tbl.h (aarch64_opcode_table): Update encoding for mrs/msr.
    * aarch64-dis-2.c: Update auto-generated file.

  gas/
    * config/tc-aarch64.c (parse_sys_reg): Remove the restriction on op0 field.

  gas/testsuite/
    * gas/aarch64/illegal.s: Update testcase.
    * gas/aarch64/illegal.d: Likewise.
    * gas/aarch64/sysreg-1.s: Likewise.
    * gas/aarch64/sysreg-1.d: Likewise.
Add NaCl (NativeClient) specific classes Target_mips_nacl and
Target_selector_mips_nacl.

gold/
	* mips.cc (Target_mips_nacl): New class.
	(Target_selector_mips_nacl): New class.
	(target_selector_mips32): Rename from target_selector_mips32be and use
	Target_selector_mips_nacl instead of Target_selector_mips.
	(target_selector_mips32el): Rename from target_selector_mips32 and use
	Target_selector_mips_nacl instead of Target_selector_mips.
	(target_selector_mips64): Rename from target_selector_mips64be and use
	Target_selector_mips_nacl instead of Target_selector_mips.
	(target_selector_mips64el): Rename from target_selector_mips64 and use
	Target_selector_mips_nacl instead of Target_selector_mips.
	(Target_mips::mips_info): Add const attribute.
PR python/16699: GDB Python command completion with overriden complete vs. completer class

This PR came from a Red Hat bug that was filed recently.  I checked and
it still exists on HEAD, so here's a proposed fix.  Although this is
marked as a Python backend bug, this is really about the completion
mechanism used by GDB.  Since this code reminds me of my first attempt
to make a good noodle, it took me quite some time to fix it in a
non-intrusive way.

The problem is triggered when one registers a completion method inside a
class in a Python script, rather than registering the command using a
completer class directly.  For example, consider the following script:

    class MyFirstCommand(gdb.Command):
          def __init__(self):
              gdb.Command.__init__(self,'myfirstcommand',gdb.COMMAND_USER,gdb.COMPLETE_FILENAME)

              def invoke(self,argument,from_tty):
                  raise gdb.GdbError('not implemented')

    class MySecondCommand(gdb.Command):
          def __init__(self):
              gdb.Command.__init__(self,'mysecondcommand',gdb.COMMAND_USER)

              def invoke(self,argument,from_tty):
                  raise gdb.GdbError('not implemented')

                  def complete(self,text,word):
                      return gdb.COMPLETE_FILENAME

    MyFirstCommand ()
    MySecondCommand ()

When one loads this into GDB and tries to complete filenames for both
myfirstcommand and mysecondcommand, she gets:

    (gdb) myfirstcommand /hom<TAB>
    (gdb) myfirstcommand /home/
                               ^
    ...
    (gdb) mysecondcommand /hom<TAB>
    (gdb) mysecondcommand /home
                                ^

(The "^" marks the final position of the cursor after the TAB).

So we see that myfirstcommand honors the COMPLETE_FILENAME class (as
specified in the command creation), but mysecondcommand does not.  After
some investigation, I found that the problem lies with the set of word
break characters that is used for each case.  The set should be the same
for both commands, but it is not.

During the process of deciding which type of completion should be used,
the code in gdb/completer.c:complete_line_internal analyses the command
that requested the completion and tries to determine the type of
completion wanted by checking which completion function will be called
(e.g., filename_completer for filenames, location_completer for
locations, etc.).

This all works fine for myfirstcommand, because immediately after the
command registration the Python backend already sets its completion
function to filename_completer (which then causes the
complete_line_internal function to choose the right set of word break
chars).  However, for mysecondcommand, this decision is postponed to
when the completer function is evaluated, and the Python backend uses an
internal completer (called cmdpy_completer).  complete_line_internal
doesn't know about this internal completer, and can't choose the right
set of word break chars in time, which then leads to a bad decision when
completing the "/hom" word.

So, after a few attempts, I decided to create another callback in
"struct cmd_list_element" that will be responsible for handling the case
when there is an unknown completer function for complete_line_internal
to work with.  So far, only the Python backend uses this callback, and
only when the user provides a completer method instead of registering
the command directly with a completer class.  I think this is the best
option because it not very intrusive (all the other commands will still
work normally), but especially because the whole completion code is so
messy that it would be hard to fix this without having to redesign
things.

I have regtested this on Fedora 18 x86_64, without regressions.  I also
included a testcase.

gdb/ChangeLog:
2014-09-03  Sergio Durigan Junior  <sergiodj@redhat.com>

	PR python/16699
	* cli/cli-decode.c (set_cmd_completer_handle_brkchars): New
	function.
	(add_cmd): Set "completer_handle_brkchars" to NULL.
	* cli/cli-decode.h (struct cmd_list_element)
	<completer_handle_brkchars>: New field.
	* command.h (completer_ftype_void): New typedef.
	(set_cmd_completer_handle_brkchars): New prototype.
	* completer.c (set_gdb_completion_word_break_characters): New
	function.
	(complete_line_internal): Call "completer_handle_brkchars"
	callback from command.
	* completer.h: Include "command.h".
	(set_gdb_completion_word_break_characters): New prototype.
	* python/py-cmd.c (cmdpy_completer_helper): New function.
	(cmdpy_completer_handle_brkchars): New function.
	(cmdpy_completer): Adjust to use cmdpy_completer_helper.
	(cmdpy_init): Set completer_handle_brkchars to
	cmdpy_completer_handle_brkchars.

gdb/testsuite/ChangeLog:
2014-09-03  Sergio Durigan Junior  <sergiodj@redhat.com>

	PR python/16699
	* gdb.python/py-completion.exp: New file.
	* gdb.python/py-completion.py: Likewise.
Reset errno before PTRACE_PEEKUSER for MIPS DSP_CONTROL

PTRACE_PEEKUSER can return -1, which is usually used to determine whether
a system call has reported an error, so errno must be used alone to
determine whether an error occurred. However errno isn't modified by a
successful system call so it must be reset to a known value (0) before the
syscall call.

Add the missing errno reset when reading the DSP_CONTROL register in the
native MIPS Linux backend and the MIPS gdbserver backend.

gdb/:
	* mips-linux-nat.c (mips_linux_read_description): Reset errno to 0
	prior to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.

gdb/gdbserver/:
	* linux-mips-low.c (mips_read_description): Reset errno to 0 prior
	to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
Add support for reading frame registers to Python API.

The ability to read registers is needed to use Frame Filter API to
display the frames created by JIT compilers.

gdb/ChangeLog:

2014-08-29  Sasha Smundak  <asmundak@google.com>

	* python/py-frame.c (frapy_read_register): New function.

gdb/doc/ChangeLog:

2014-08-26  Sasha Smundak  <asmundak@google.com>

	* python.texi (Frames in Python): Add read_register description.

gdb/testsuite/ChangeLog:

2014-08-26  Sasha Smundak  <asmundak@google.com>

	* gdb.python/py-frame.exp: Test Frame.read_register.
Improve Type.template_argument docs in Python API.

gdb/doc/ChangeLog:

	* python.texi (Types In Python): Type.template_argument(n) returns a
	gdb.Value or a gdb.Type and throws an exception if n is out of
	range.
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