2011-09-29 Sriraman Tallam  <tmsriram@google.com>

* layout.h (section_order_map_): New member.
(get_section_order_map): New member function.
* output.cc (Output_section::add_input_section): Check for patterns
only when --section-ordering-file is specified.
* gold.cc (queue_middle_tasks): Delay updating order of sections till
output_sections have been formed.
* layout.cc (Layout_Layout): Initialize section_order_map_.
* plugin.cc (update_section_order): Store order in order_map. Do not
update the order.
* testsuite/Makefile.am: Add test case for plugin_final_layout.
* testsuite/Makefile.in: Regenerate.
* testsuite/plugin_section_order.c: New file.
* testsuite/plugin_final_layout.cc: New file.
* testsuite/plugin_final_layout.sh: New file.

* gold/incremental.cc (Sized_incremental_binary::do_process_got_plt):
Check for NULL.
* gold/symtab.cc (Symbol_table::add_from_relobj): Ignore version
symbols during incremental update.
(Symbol_table::add_from_dynobj): Likewise.

* lib/gdb.exp (is_amd64_regs_target, is_x86_like_target): Allow
for 64-bit multilibs from i?86-* targets.

lib/gdb.exp: Fix a typo

gdb.base/foll-fork.exp: fix up race

PR ld/13233
* elflink.c (_bfd_elf_gc_mark_extra_sections): Mark single member
debug and special section groups.

sim: bfin: use store buffer for VIT_MAX insns

The VIT_MAX insns can be used in parallel, so we need to use the store
buffer so we don't clobber the output register before we get a chance
to do a memory store with it.

Reported-by: Kai Iskratsch <kai@stella.at>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

gdb/doc/
* gdb.texinfo (Files): Update options for `add-symbol-file'.
Add one space after option `-s'.  Remove @r{} markup.

gdb/
* symfile.c (add_symbol_file_command): Update message on usage.

Fix --gc-sections failure with symbol versioning.

bfd/

2011-09-28  H.J. Lu  <hongjiu.lu@intel.com>

PR ld/13195
* elflink.c (_bfd_elf_merge_symbol): Don't set dynamic_def when
clearing def_dynamic.
(elf_link_add_object_symbols): Likewise.  Set dynamic_def when
setting def_dynamic.
(bfd_elf_gc_mark_dynamic_ref_symbol): Check if a symbol is
versioned.

ld/testsuite/

2011-09-28  H.J. Lu  <hongjiu.lu@intel.com>

PR ld/13195
* ld-elf/elf.exp: Add a C link testcase for PR ld/13195.

* ld-elf/pr13195.c: New.
* ld-elf/pr13195.d: Likewise.
* ld-elf/pr13195.s: Likewise.
* ld-elf/pr13195.t: Likewise.

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daily update

* gdb.python/py-type.c (enum E): New.
* gdb.python/py-type.exp (test_fields): Add tests for Python
mapping access to fields.
(test_enums): New test for field access on enums.

* python/py-type.c (make_fielditem, typy_field_names, typy_items)
(typy_length, typy_get, typy_has_key, typy_make_iter)
(typy_iterkeys, typy_iteritems, typy_itervalues, typy_iter)
(typy_iterator_iter, typy_iterator_iternext)
(typy_iterator_dealloc): New functions to implement standard
Python mapping methods on gdb.Type object.
(gdb.TypeIterator): New Python type.
* python/python-internal.h (gdbpy_iter_kind): New enum.
* doc/gdb.texinfo (gdb.Type): Document field access by dictionary
key syntax.

merge from gcc

Fix complex floats on sparc.

* sparc-tdep.h (SPARC_F2_REGNUM, SPARC_F3_REGNUM, SPARC_F4_REGNUM,
SPARC_F5_REGNUM, SPARC_F6_REGNUM, SPARC_F7_REGNUM): New enums.
* sparc-tdep.c (sparc_complex_floating_p): New function.
(sparc32_store_arguments): Handle complex floats.
(sparc32_extract_return_value): Likewise.
(sparc32_store_return_value): Likewise.
(sparc32_stabs_argument_has_addr): Likewise.
* sparc64-tdep.c (sparc64_complex_floating_p): New function.
(sparc64_store_floating_fields): Handle complex floats.
(sparc64_store_arguments): Likewise.
(sparc64_store_return_value): Likewise.

* binutils/testsuite/binutils-all/elfedit-4.d: Give test a unique name.

Another typo ... :(

    * gas/pe/section-exclude.d: Correct testcase.

Support "set environment" and "unset environment" in MinGW builds.

* windows-nat.c (env_sort) [!__CYGWIN__]: Function restored from
before the change on 2006-12-09.
(windows_create_inferior) [!__CYGWIN__]: Restore code that
generates the environment block for CreateProcessA, modulo the
Cygwin-specific parts that are not needed here.

2011-09-28  Tristan Gingold  <gingold@adacore.com>

* od-xcoff.c (dump_xcoff32_aout_header): Fix typo.

* symtab.cc (Symbol_table::define_special_symbol): Always
canonicalize version string.

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daily update

2011-09-27  Kai Tietz  <ktietz@redhat.com>

       * config/obj-coff.c (obj_coff_section): Add 'e' as specifier
       for marking section SEC_EXCLUDE.

2011-09-27  Kai Tietz  <ktietz@redhat.com>

       * gas/pe/pe.exp: Add new testcase.
       * gas/pe/section-exclude.d: New file.
       * gas/pe/section-exclude.s: New file.

* coffcode.h (sec_to_styp_flags): Handle
SEC_LINK_DUPLICATES_SAME_CONTENTS, and
SEC_LINK_DUPLICATES_SAME_SIZE.

    * scripttempl/pe.sc (.text): Add support for
        .gnu.linkonce.t.* section.
        (.debug_info): Only use .gnu.linkonce.wi.* for
        relocating.
        * scripttempl/pep.sc: Likewise.

2011-09-27  Tristan Gingold  <gingold@adacore.com>

* target.h (enum target_object): Add TARGET_OBJECT_DARWIN_DYLD_INFO.
* solib-darwin.c (DYLD_VERSION_MAX): Update number.
(darwin_solib_get_all_image_info_addr_at_init): New function.
(darwin_solib_read_all_image_info_addr): Likewise.
(darwin_solib_create_inferior_hook): Use the above two functions.
* darwin-nat.c (darwin_execvp): Renames retval to res.
(darwin_read_write_inferior): Update comment.
(darwin_read_dyld_info): New function.
(darwin_xfer_partial): Handle DYLD_INFO.

Add return address collection for tracepoints.
* tracepoint.c (encode_actions_1): Add case for $_ret.
(validate_actionline): Check for $_ret.
(trace_dump_actions): Ditto.
* ax-gdb.h (gen_trace_for_return_address): Declare.
* ax-gdb.c: Include arch-utils.h.
(gen_trace_for_return_address): New function.
(agent_command): Add return address special case.
* amd64-tdep.c: Include ax.h and ax-gdb.h.
(amd64_gen_return_address): New function.
(amd64_init_abi): Call it.
* i386-tdep.c: Include ax.h and ax-gdb.h.
(i386_gen_return_address): New function.
(i386_init_abi): Call it.
* arch-utils.h (default_gen_return_address): Declare.
* arch-utils.c (default_gen_return_address): New function.
* gdbarch.sh (gen_return_address): New method.
* gdbarch.h, gdbarch.c: Regenerate.

* gdb.texinfo (Tracepoint Action Lists): Document $_ret.

* gdb.trace/collection.exp: Test collection of $_ret.

2011-09-27  Tristan Gingold  <gingold@adacore.com>

* od-xcoff.c (dump_xcoff32_aout_header): Remove some gettext macros.
(dump_xcoff32_sections_header): Likewise.
(dump_xcoff32_symbols, dump_xcoff32_relocs): Likewise.
(dump_xcoff32_lineno, dump_xcoff32_loader): Likewise.
(dump_xcoff32_except): Likewise.
(dump_xcoff32_typchk, dump_xcoff32_tbtags): Likewise.

2011-09-27  Tristan Gingold  <gingold@adacore.com>

* readelf.c (print_ia64_vms_note): Fix xgettext warnings.

opcodes/

* sparc-opc.c (sparc_opcodes): Fix random instruction to write
to a float instead of an integer register.

gas/testsuite/

* gas/sparc/hpcvis3.s: Update to use float reg for random insn.
* gas/sparc/hpcvis3.d: Likewise.

merge from gcc

daily update

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* gold/gold.cc (queue_initial_tasks): Move option checks ...
* gold/options.cc (General_options::finalize): ... to here. Disable
some options; make others fatal.

merge from gcc

include/ChangeLog

gcc PR lto/47247
* plugin-api.h (enum ld_plugin_symbol_resolution): Add
LDPR_PREVAILING_DEF_IRONLY_EXP.
(enum ld_plugin_tag): Add LDPT_GET_SYMBOLS_V2.

gold/ChangeLog

gcc PR lto/47247
* plugin.cc (get_symbols_v2): New function.
(Plugin::load): Add LDPT_GET_SYMBOLS_V2.
(is_referenced_from_outside): New function.
(Pluginobj::get_symbol_resolution_info): Add version parameter, return
LDPR_PREVAILING_DEF_IRONLY_EXP when using new version.
(get_symbols): Pass version parameter.
(get_symbols_v2): New function.
* plugin.h (Pluginobj::get_symbol_resolution_info): Add version
parameter.
* testsuite/plugin_test.c (get_symbols_v2): New static variable.
(onload): Add LDPT_GET_SYMBOLS_V2.
(all_symbols_read_hook): Use get_symbols_v2; check for
LDPR_PREVAILING_DEF_IRONLY_EXP.
* testsuite/plugin_test_3.sh: Update expected results.

Add sparc integer multiply-add instructions.

opcodes/

* sparc-opc.c (sparc_opcodes): Add integer multiply-add
instructions.

gas/testsuite/

* gas/sparc/ima.d: New test.
* gas/sparc/ima.s: New test source.
* gas/sparc/sparc.exp: Run new test.

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daily update

daily update

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daily update

*** empty log message ***

merge from gcc

merge from gcc

* configure.ac: Add new --with-gold-ldadd and --with-gold-ldflags
configuration options.
* configure: Regenerate.
* Makefile.am: Handle GOLD_LDADD and GOLD_LDFLAGS.
* Makefile.in: Regenerate.
* testsuite/Makefile.in: Regenerate.

PR gdb/13079
* i386-tdep.c (i386_frame_align): New.
(i386_gdbarch_init): Use i386_frame_align.

gdb/
* i386-linux-nat.c (i386_linux_resume): Use read_memory_unsigned_integer
to get address.

daily update

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2011-09-22  Tristan Gingold  <gingold@adacore.com>

* fork-child.c (fork_inferior): Add exec_fun parameter.
Call exec_fun or execvp.
* inferior.h: Adjust prototype.
* gnu-nat.c (gnu_create_inferior): Adjust fork_inferior call.
* inf-ttrace.c (inf_ttrace_create_inferior): Ditto.
* inf-ptrace.c (inf_ptrace_create_inferior): Ditto.
* procfs.c (procfs_create_inferior): Ditto.
* darwin-nat.c (darwin_execvp): New function.
(darwin_create_inferior): Use it.

bfd/
2011-09-22  Tristan Gingold  <gingold@adacore.com>

* configure.in: Bump version to 2.22.51
* configure: Regenerate.

binutils/
2011-09-22  Tristan Gingold  <gingold@adacore.com>

* NEWS: Add marker for 2.22.

gas/
2011-09-22  Tristan Gingold  <gingold@adacore.com>

* NEWS: Add marker for 2.22.

ld/
2011-09-22  Tristan Gingold  <gingold@adacore.com>

* NEWS: Add marker for 2.22.

2011-09-22  Andreas Tobler  <andreast@fgznet.ch>

* lib/gdb.exp (gdb_compile): Set rpath and remove -ldl from the
list of compilation switches for <*-*-freebsd*>.

gdb/
* infrun.c (context_switch): Print debug message when switching to
a different thread.

Add new sparc options to control instruction availability.

gas/

* config/tc-sparc.c (hwcap_allowed): New.
(struct sparc_arch): New field 'hwcap_allowed' containing a bitmask
of F_FOO flags which are enabled by the particular arch setting.
Add new options that provide explicit access to new instructions.
(md_parse_option): Only bump max_architecture if the requested one
is larger, or this is the first explicit request.
(get_hwcap_name): New function.
(sparc_ip): Validate that hwcaps used by an instruction have actually
been enabled.
* doc/c-sparc.texi: Document new sparc options.

daily update

*** empty log message ***

Fix sparc testcases when building with 64-bit default.

gas/testsuite/

* gas/sparc/imm-plus-rreg.d: Fix address regex for 64-bit.
* gas/sparc/save-args.d: Likewise.
* gas/sparc/ticc-imm-reg.d: Likewise, add -32 to options.
* gas/sparc/v8-movwr-imm.d: Likewise.

Annotate sparc objects with cpu hardware capabilities used.

bfd/

* elfxx-sparc.c (_bfd_sparc_elf_merge_private_bfd_data): New.
* elfxx-sparc.h: Declare it.
* elf32-sparc.c (elf32_sparc_merge_private_bfd_data): Call it.
* elf64-sparc.c (elf64_sparc_merge_private_bfd_data): Likewise.

binutils/

* readelf.c (display_sparc_hwcaps): New.
(display_sparc_gnu_attribute): New.
(process_sparc_specific): New.
(process_arch_specific): When EM_SPARC, EM_SPARC32PLUS,
or EM_SPARCV9 invoke process_sparc_specific.

gas/

* config/tc-sparc.c (hwcap_seen): New bitmask, defined when
not TE_SOLARIS.
(sparc_ip): When not TE_SOLARIS, accumulate hwcap bits from
sparc_opcode->flags of instruction into hwcap_seen.
(sparc_md_end): Create Tag_GNU_Sparc_HWCAPS attribute if
hwcap_seen is non-zero and not TE_SOLARIS.

gas/testsuite/

* gas/sparc/hpcvis3.s: Update for fixed fchksum16 mnemonic.
* gas/sparc/hpcvis3.d: Likewise.

include/elf/

* sparc.h (Tag_GNU_Sparc_HWCAPS): New object attribute.
(ELF_SPARC_HWCAP_*): New HWCAPS bitmask values.

include/opcode/

* sparc.h (struct sparc_opcode): Expand 'flags' to unsigned int.
(F_MUL32, F_DIV32, F_FSMULD, F_V8PLUS, F_POPC, F_VIS, F_VIS2,
F_ASI_BLK_INIT, F_FMAF, F_VIS3, F_HPC, F_RANDOM, F_TRANS,
F_FJFMAU, F_IMA, F_ASI_CACHE_SPARING): New flag bits.

opcodes/

* sparc-opc.c (sparc_opcodes): Annotate table with HWCAP flag
bits.  Fix "fchksm16" mnemonic.

* MAINTAINER: Take over from Jakub Jalinek as SPARC maintainer.

* s390-tdep.c (s390_function_arg_pass_by_reference): Handle
complex and vector types.
(s390_return_value_convention): Likewise.

(s390_value_from_register): Call check_typedef.
(extend_simple_arg): Likewise.
(alignment_of): Likewise.
(s390_push_dummy_call): Likewise.
(s390_return_value): Likewise.

Fix ChangeLog dates.

* linux-arm-low.c (struct arm_linux_hwbp_cap): Remove.
(arm_linux_hwbp_cap): New static variable.
(arm_linux_get_hwbp_cap): Replace by ...
(arm_linux_init_hwbp_cap): ... this new function.
(arm_linux_get_hw_breakpoint_count): Use arm_linux_hwbp_cap.
(arm_linux_get_hw_watchpoint_count): Likewise.
(arm_linux_get_hw_watchpoint_max_length): Likewise.
(arm_arch_setup): Call arm_linux_init_hwbp_cap.
(arm_prepare_to_resume): Use perror_with_name instead of error.

* event-top.c (async_disconnect): If an exception is thrown from
quit_cover, call pop_all_targets.  Use TRY_CATCH instead of
catch_errors.
* top.c (quit_cover): Return void and take no arguments.
* top.h (quit_cover): Update prototype.

* linux-arm-low.c: Include <signal.h>.
(PTRACE_GETHBPREGS, PTRACE_SETHBPREGS): Define if necessary.
(struct arm_linux_hwbp_cap): New data type.
(arm_hwbp_type, arm_hwbp_control_t): New typedefs.
(struct arm_linux_hw_breakpoint): New data type.
(MAX_BPTS, MAX_WPTS): Define.
(struct arch_process_info, struct arch_lwp_info): New data types.
(arm_linux_get_hwbp_cap): New function.
(arm_linux_get_hw_breakpoint_count): Likewise.
(arm_linux_get_hw_watchpoint_count): Likewise.
(arm_linux_get_hw_watchpoint_max_length): Likewise.
(arm_hwbp_control_initialize): Likewise.
(arm_hwbp_control_is_enabled): Likewise.
(arm_hwbp_control_is_initialized): Likewise.
(arm_hwbp_control_disable): Likewise.
(arm_linux_hw_breakpoint_equal): Likewise.
(arm_linux_hw_point_initialize): Likewise.
(struct update_registers_data): New data structure.
(update_registers_callback: New function.
(arm_insert_point): Likewise.
(arm_remove_point): Likewise.
(arm_stopped_by_watchpoint): Likewise.
(arm_stopped_data_address): Likewise.
(arm_new_process): Likewise.
(arm_new_thread): Likewise.
(arm_prepare_to_resume): Likewise.
(the_low_target): Register arm_insert_point, arm_remove_point,
arm_stopped_by_watchpoint, arm_stopped_data_address, arm_new_process,
arm_new_thread, and arm_prepare_to_resume.

2011-09-21  Tristan Gingold  <gingold@adacore.com>

* mach-o.c (bfd_mach_o_convert_section_name_to_bfd): Add comment.
Deals with size limited strings.
(bfd_mach_o_build_commands): Initialize more fields.

*** empty log message ***

daily update

* mi/mi-main.c (mi_load_progress): Restore saved_uiout value to
current_uiout, not uiout.

fix pr reference

PR ld/12301
* ldlang.h (lang_input_statement_type): Add "reload" bitfield.
Clarify comments.
* ldlang.c (new_afile): Init new field.
(load_symbols): Don't call ldlang_add_file when reloading.
(open_input_bfds): Reload as-needed libs during plugin rescan.

daily update

*** empty log message ***

2011-09-19  Sriraman Tallam  <tmsriram@google.com>

* plugin.h (should_defer_layout): Modify to check for any_claimed_.

* incremental.cc (can_incremental_update): Fix typo in comment.
* incremental.h (can_incremental_update): Likewise.

* python/py-auto-load.c (source_section_scripts): Fix file
descriptor leak.
* python/python.c (source_python_script_for_objfile): Tweak comments.

* gdb.trace/tspeed.exp: New file.
* gdb.trace/tspeed.c: New file.

[OBV] fix typos in ChangeLog

2011-09-19  Tristan Gingold  <gingold@adacore.com>

* config/tc-alpha.c (insert_operand): Call as_bad_value_out_of_range
instead of as_warn_out_of_range.

*** empty log message ***

daily update

Check zero address size.

2011-09-18  H.J. Lu  <hongjiu.lu@intel.com>

PR binutils/13196
* dwarf.c (display_debug_aranges): Check zero address size.

* incremental.cc (can_incremental_update): New function.
* incremental.h (can_incremental_update): New function.
* layout.cc (Layout::init_fixed_output_section): Call it.
(Layout::make_output_section): Don't allow patch space in .eh_frame.
* object.cc (Sized_relobj_file::do_layout): Call
can_incremental_update.

Support displaced stepping for Thumb 16-bit insns.
gdb/
* arm-tdep.c (THUMB_NOP) Define.
(thumb_copy_unmodified_16bit): New.
(thumb_copy_b, thumb_copy_bx_blx_reg): New.
(thumb_copy_alu_reg): New.
(arm_copy_svc): Move some common code to ...
(install_svc): ... here.  New.
(thumb_copy_svc): New.
(install_pc_relative): New.
(thumb_copy_pc_relative_16bit): New.
(thumb_decode_pc_relative_16bit): New.
(thumb_copy_16bit_ldr_literal): New.
(thumb_copy_cbnz_cbz): New.
(cleanup_pop_pc_16bit_all): New.
(thumb_copy_pop_pc_16bit): New.
(thumb_process_displaced_16bit_insn): New.
(thumb_process_displaced_32bit_insn): New.
(thumb_process_displaced_insn): process thumb instruction.

Support displaced stepping for Thumb 32-bit insns.
gdb/
* arm-tdep.c (thumb_copy_unmodified_32bit): New.
(thumb2_copy_preload): New.
(thumb2_copy_copro_load_store): New.
(thumb2_copy_b_bl_blx): New.
(thumb2_copy_alu_imm): New.
(thumb2_copy_load_reg_imm): New.
(thumb2_copy_load_literal): New
(thumb2_copy_block_xfer): New.
(thumb_32bit_copy_undef): New.
(thumb_32bit_copy_unpred): New.
(thumb2_decode_ext_reg_ld_st): New.
(thumb2_decode_svc_copro): New.
(decode_thumb_32bit_store_single_data_item): New.
(thumb_copy_pc_relative_32bit): New.
(thumb_decode_pc_relative_32bit): New.
(decode_thumb_32bit_ld_mem_hints): New.
(thumb2_copy_table_branch): New
(thumb_process_displaced_32bit_insn): Process Thumb 32-bit
instructions.

gdb/testsuite/
* gdb.arch/arm-disp-step.S (test_ldr_literal): Test for Thumb
instructions.
(test_adr_32bit, test_pop_pc): Likewise.
(test_ldr_literal_16, test_cbz_cbnz, test_adr): New test for
Thumb instructions.
* gdb.arch/arm-disp-step.exp (test_ldm_stm_pc): Match $gdb_prompt
in gdb_test_multiple.
(test_ldr_literal_16, test_cbz_cbnz, test_adr): New.

gdb/
* arm-tdep.c (install_copro_load_store): PC is set 4-byte aligned.
(install_b_bl_blx): Likewise.

gdb/testsuite/
* lib/gdb.exp (can_single_step_to_signal_handler): New.
* gdb.base/kill-after-signal.exp: Call it.  Skip if target doesn't
support single step to signal handler.

*** empty log message ***

daily update

gdb/
        * arm-tdep.c (install_ldr_str_ldrb_strb): Renamed to ...
        (install_load_store): ... this.  New.
        Change parameter BYTE to SIZE.
        (arm_copy_ldr_str_ldrb_strb): Update caller.
        (arm_decode_ld_st_word_ubyte): Update caller.

gdb/testsuite/
* gdb.base/disp-step-fork.c: New.
* gdb.base/disp-step-syscall.exp: New.
* gdb.base/disp-step-vfork.c: New.

gdb/
* infrun.c (displaced_step_fixup): Move some code ...
(displaced_step_restore): ... here.  New function.
(handle_inferior_event): Cleanup displaced stepping state for both
child and parent when get forked or vforked event.
* regcache.c (get_thread_arch_aspace_regcache): New function.
get_thread_arch_regcache (): Call it.

daily update

*** empty log message ***

[Ada] Re-implement `info tasks' command using ui-out

This is in preparation for providing a GDB/MI equivalent of
the `info tasks' command.  The previous implementation was using
various printf commands to generate the command output, which
does not work at all if we want to use that same code to generate
the result for that new GDB/MI command.

This patch thus re-implements the `info tasks' command (with no
arguments) in a way that makes it GDB/MI friendly.

There is an additional hicup, which is the fact that the `info tasks'
command displays a completely different type of output when a task
ID is given. For instance:

    (gdb) info task 2
    Ada Task: 0x644d20
    Name: my_callee
    Thread: 0
    LWP: 0x5809
    Parent: 1 (main_task)
    Base Priority: 48
    State: Blocked in accept or select with terminate

The above output is better when in CLI mode, but really not
what we want when in GDB/MI mode. In GDB/MI mode, we want to
follow what the `-thread-info' command does when a task-id
is given as an argument, which is to produce the same table,
but with only one element/task in it.

For compatibility as well as practical reasons, we do not want
to change the output of the `info task TASKNO' command when in
CLI mode.  But it's easy to preserve this behavior while providing
the desirable output when in GDB/MI mode.  For this, the function
used to generated the `info tasks' output has been enhanced to take
an argument interpreted as a string. The CLI command knows to never
provide that argument, while the GDB/MI command will pass one if
provided by the user.

gdb/ChangeLog:

        * ada-tasks.c (print_ada_task_info): New function, merging
        short_task_info and info_tasks together.  Reimplement using
        ui-out instead of printing to stdout directly.  Move the code
        building and checking the task list here, instead of leaving it
        in info_tasks_command.
        (info_task): Move the code building and checking the task
        list here, instead of leaving it in info_tasks_command.
        (info_tasks_command): Delete code building and checking
        the task list - moved elsewhere.  Update calls to info_tasks
        and info_task.

One of the minor changes the switch caused is the introduction
of a space between the "current" column, and the task "ID"
column, which wasn't there before.  This matches what we do
in the "info threads" command, so I kept that change.  This
required an adjustment in the testsuite, however...

gdb/testsuite/ChangeLog:

        * gdb.ada/tasks.exp: Make the expected output for
        the `info tasks' tests more resilient to spacing
        changes.

[Ada] Remove `from_tty' parameter from ada-tasks.c:info_task

This parameter is unused, and probably will never be useful.

gdb/ChangeLog:

        * ada-tasks.c (info_task): Delete parameter `from_tty'.

[Ada] Remove `from_tty' parameter from ada-tasks.c:info_tasks

This parameter is unused, and probably will never be useful.

gdb/ChangeLog:

        * ada-tasks.c (info_tasks): Delete parameter `from_tty'.

[Ada] Adjust ada-tasks.c:ada_build_task_list

Originally, this function had a parameter called `warn_if_null'
which would trigger a message to be printed on stdout if the
program was found to not use Ada tasking.  It used one of the printf_
functions for that, which is wrong when considering the context of
GDB/MI interpreters.

So, this patch changes this function to stop printing the message,
and leaves that part to the callers instead.  It also changes the
semantics slightly to return the number of tasks found, rather than
a yes/no answer.  Not strictly needed, but simple enough to do, and
potentially useful later.

gdb/ChangeLog:

        * ada-lang.h (ada_build_task_list): Remove parameter
        `warn_if_null'.
        * ada-tasks.c (ada_build_task_list): Remove parameter
        `warn_if_null'.  Adjust implementation and documentation.
        (valid_task_id, ada_get_environment_task)
        iterate_over_live_ada_tasks): Adjust call to ada_build_task_list.
        (info_tasks_command): Adjust implementation.
        (task_command): Likewise.
        * ravenscar-thread.c (ravenscar_find_new_threads): Fix call
        to ada_build_task_list.