Zap romp host.

All 5.1 obsolete targets are done.

(Changes from Kevin Buettner, with minor update by Don Howard.)

* i387-nat.c (i387_supply_fxsave, i387_fill_fxsave, i387_tag): Fix
typos in which hexadecimal constants were really intended to be
binary constants.
(i387_tag): Swap logic regarding zero vs non-zero exponents.

Added myself to the write-after-approval list.

Added myself to the write-after-approval list.

Support printable characters outside of the ASCII range

Add openRISC support in opcodes

(Changes from Daniel Berlin, with revisions by Jim Blandy.)

Abstract out operations specific to particular C++ ABI's, and
invoke them through a function table.  This removes the C++ ABI
dependencies scattered throughout the code, and allows us to
cleanly add support for new C++ ABI's.
* cp-abi.h, cp-abi.h, gnu-v2-abi.c, hpacc-abi.c: New files.
* c-typeprint.c, c-valprint.c, dbxread.c, eval.c, gdbtypes.c,
jv-typeprint.c, linespec.c, symtab.c, typeprint.c, valops.c:
#include "cp-abi.h".  These files all use functions now declared
there.
* symtab.h (OPNAME_PREFIX_P, VTBL_PREFIX_P, DESTRUCTOR_PREFIX_P):
Deleted.  These services are now provided by functions declared in
cp-abi.h.
* value.h (value_rtti_type, value_virtual_fn_field): Same.
* values.c (value_virtual_fn_field): Same, for this definition.
* valops.c (value_rtti_type): Same.
* c-typeprint.c (c_type_print_base): Use the functions from
"cp-abi.h", instead of the old macros, or hard-coded ABI-specific
tests.
* dbxread.c (record_minimal_symbol): Same.
* gdbtypes.c (get_destructor_fn_field, virtual_base_index,
virtual_base_index_skip_primaries): Same.
* jv-typeprint.c (java_type_print_base): Same.
* linespec.c (find_methods, decode_line_1): Same.
* symtab.c (gdb_mangle_name): Same.
* Makefile.in (SFILES): Add the new .c files mentioned above.
(cp_abi_h): New variable.
(COMMON_OBS): Add gnu-v2-abi.o, hpacc-abi.o, and cp-abi.o.
(cp-abi.o, gnu-v2-abi.o, hpacc-abi.o): New targets.
(c-typeprint.o, c-valprint.o, dbxread.o, eval.o, gdbtypes.o,
jv-typeprint.o, symtab.o, linespec.o, typeprint.o, valops.o): Add
dependency on $(cp_abi_h).

2001-04-26  Michael Snyder  <msnyder@redhat.com>

* thread-db.c (_initialize_thread_db): Add set/show command
"debug-linux-threads" for debugging output.
* lin-lwp.c (various): Use global "debug_linux_threads to
turn on extra debugging output.

2001-04-26  Michael Snyder  <msnyder@redhat.com>

* lin-lwp.c: Minor cleanups in comments.

2001-04-26  Michael Snyder  <msnyder@redhat.com>

* target.c (normal_pid_to_str): Get rid of an ancient hack.
* remote.c (remote_pid_to_str): New function for remote target.

* Makefile.in (idecode.o, op_utils.o, semantics.o, simops.o):
Depend on targ-vals.h.

2001-04-26  H.J. Lu  <hjl@gnu.org>

* elf32-i386.c (elf_i386_check_relocs): Verify if r_symndx is
valid.

Add ability to pad code alignment frags with no-ops.

* configure.in (noconfigdirs): Don't reset it from scratch in the
target case; only append to it.

* configure.in (noconfigdirs) [hppa*-*-*, mips*-*-irix6*,
sparc-*-solaris2.8]: Disable ${libgcj}.

* configure.in (libgcj_saved): Copy from $libgcj.
(libgcj): Zero out if --enable-libgcj; add to noconfigdirs is
--disable-libgcj.

* thanks, nickc

2001-04-25  Frank Ch. Eigler  <fche@redhat.com>

* sim-load.c (sim_load_file): Put it back [...]

* externalize a function

2001-04-25  Frank Ch. Eigler  <fche@redhat.com>

* bfd-in.h (bfd_cache_close): Declare newly exported function.
* bfd-in2.h: Regenerated.

Fix autoconf breakage + commit target.c, omitted in previous delta

Check to see if the filename symbol has been initialised before extracting
its symbol index.

2001-04-24  H.J. Lu  <hjl@gnu.org>

* configure: Regenerated with the right version of autoconf.

* c-typeprint.c (c_type_print_cv_qualifier): Don't print `const'
qualifier on C++ references; all references are innately const.

* sparc.h: Fix typo.

* merge.c (struct sec_merge_hash_entry): Add alignment field.
(struct sec_merge_hash): Remove alignment_power.
(sec_merge_hash_newfunc): Clear alignment.
(sec_merge_hash_lookup): Pass alignment as argument.
Use hashp->root.next, not hashp->next to walk the hash chain.
If a string already in the hashtable does not have required
alignment, create a new hashtable entry.
(sec_merge_init): Remove alignment_power argument.
(sec_merge_add): Add alignment argument.
(sec_merge_emit): Alignment is now a per-entity thing, not per
section.
(_bfd_merge_section): Sanity check even non-SEC_STRINGS sections
for proper alignment.
Pass alignment information to sec_merge_add.

* gdb.c++/templates.exp: If we see the prompt for the overload
list, but we haven't recognized any of the longer patterns,
arrange for this test to fail, not hang.

* gdb.c++/classes.exp (ptype class A): Tolerate whitespace
variations.

z8k fixes

Add OpenRISC support

2001-04-22  Michael Chastain  <chastain@redhat.com>

* gdb.c++/local.exp: Use the 'runto' library function.
* gdb.c++/namespace.exp: Likewise.
* gdb.c++/overload.exp: Likewise.

2001-04-23  Bo Thorsen  <bo@suse.de>

* x86-64.h: Add vtable support.

2001-04-23  Bo Thorsen  <bo@suse.de>

* elf64-x86-64.c: Add c++ vtable hack.
Small whitespace and comment changes.

Revert call to bfd_cache_close().

2000-04-20  Jason Eckhardt  <jle@redhat.com>

* config/tc-d10v.h (tc_frob_label): Update the symbol's frag
since frag_now can change after d10v_cleanup is called.

* event-top.h: Fix formatting.

* ltconfig, ltmain.sh, ltcf-cxx.sh: Upgraded to libtool 1.4a
1.641.2.228.

Obsolete MPW as host.

* bug fix

2001-04-19  Frank Ch. Eigler  <fche@redhat.com>

* sim-utils.c (sim_analyze_program): Call bfd_cache_close after
we're finished with its immediate use.
* sim-load.c (sim_load_file): Ditto.

* i386-tdep.c (i386_frameless_function_invocation): New function.
* config/i386/tm-i386.h (FRAMELESS_FUNCTION_INVOCATION): Redefine
in terms of i386_frameless_function_invocation.  Adjust comment.
(i386_frameless_function_invocation): New prototype.

2001-04-19  Andreas Jaeger  <aj@suse.de>

* elf64-x86-64.c (elf64_x86_64_plt0_entry): Fix instructions.
(elf64_x86_64_plt_entry): Likewise.
(elf64_x86_64_finish_dynamic_sections): Fix PLT0 generation.
(elf64_x86_64_finish_dynamic_symbol): Fix PLT generation.

2001-04-18  Martin M. Hunt  <hunt@redhat.com>

* top.c (gdb_init): Don't call cli_out_new() to
create global uiout if init_ui_hook is set.  uiout will
have to be initialized there.

#include "regcache.h".

* XScale coprocessor support.

2001-04-18  matthew green  <mrg@redhat.com>

* armcopro.c (write_cp15_reg): Set CHANGEMODE if endianness changes.
(read_cp15_reg): Make non-static.
(XScale_cp15_LDC): Update for write_cp15_reg() change.
(XScale_cp15_MCR): Likewise.
(XScale_cp15_write_reg): Likewise.
(XScale_check_memacc): New function. Check for breakpoints being
activated by memory accesses.  Does not support the Branch Target
Buffer.
(XScale_set_fsr_far): New function. Set FSR and FAR for XScale.
(XScale_debug_moe): New function. Set the debug Method Of Entry,
if configured.
(write_cp14_reg): Reset count counter if requested.
* armdefs.h (struct ARMul_State): New members `LastTime' and
`CP14R0_CCD' used for the timer/counters.
(ARMul_CP13_R0_FIQ, ARMul_CP13_R0_IRQ, ARMul_CP13_R8_PMUS,
ARMul_CP14_R0_ENABLE, ARMul_CP14_R0_CLKRST, ARMul_CP14_R0_CCD,
ARMul_CP14_R0_INTEN0, ARMul_CP14_R0_INTEN1, ARMul_CP14_R0_INTEN2,
ARMul_CP14_R0_FLAG0, ARMul_CP14_R0_FLAG1, ARMul_CP14_R0_FLAG2,
ARMul_CP14_R10_MOE_IB, ARMul_CP14_R10_MOE_DB, ARMul_CP14_R10_MOE_BT,
ARMul_CP15_R1_ENDIAN, ARMul_CP15_R1_ALIGN, ARMul_CP15_R5_X,
ARMul_CP15_R5_ST_ALIGN, ARMul_CP15_R5_IMPRE, ARMul_CP15_R5_MMU_EXCPT,
ARMul_CP15_DBCON_M, ARMul_CP15_DBCON_E1, ARMul_CP15_DBCON_E0): New
defines for XScale registers.
(XScale_check_memacc, XScale_set_fsr_far, XScale_debug_moe): Prototype.
(ARMul_Emulate32, ARMul_Emulate26): Clean up function definition.
(ARMul_Emulate32): Handle the clock counter and hardware instruction
breakpoints.  Call XScale_set_fsr_far() for software breakpoints and
software interrupts.
(LoadMult): Call XScale_set_fsr_far() for data aborts.
(LoadSMult): Likewise.
(StoreMult): Likewise.
(StoreSMult): Likewise.
* armemu.h (write_cp15_reg): Update prototype.
* arminit.c (ARMul_NewState): Initialise CP14R0_CCD and LastTime.
(ARMul_Abort): If XScale, check for FIQ and IRQ being enabled in CP13
register 0.
* armvirt.c (GetWord): Call XScale_check_memacc().
(PutWord): Likewise.

2001-04-17  Michael Snyder  <msnyder@redhat.com>

        * i386-nat.c: Fix typo in comment.

* dlltool.c (do_default_excludes): Initialise to true.

Fix thinko.

2001-04-17  Michael Snyder  <msnyder@redhat.com>

* solib.c (no_shared_libraries): New function.  Discard all symbols
from shared libraries.
(_initialize_solib): Add command "nosharedlibrary" as complement
to the command "sharedlibrary".  Unloads symbols for all solibs.

* i386-tdep.c (i386_saved_pc_after_call): New function.
* config/i386/tm-i386.h (SAVED_PC_AFTER_CALL): Redefine in terms
of i386_saved_pc_after_call.
(i386_saved_pc_after_call): New prototype.

Obsolete NEWS and ISI systems (along with a few redundant m68k targets).

2001-04-17  Michael Snyder  <msnyder@redhat.com>

* remote.c (remote_open_1): On opening the remote target, activate
the solib_create_inferior_hook, so that it can detect when the
target loads shared libraries.
(remote_async_open_1): Ditto.

2001-04-17  Michael Snyder  <msnyder@redhat.com>

        * breakpoint.c (print_one_breakpoint): Handle 64-bit addresses.
* tracepoint.c (tracepoints_info): Handle 64-bit addresses.
        * testsuite/gdb.trace/deltrace.exp: Allow for 64-bit addresses.
* testsuite/gdb.trace/infotrace.exp: Ditto.
        * testsuite/gdb.trace/passcount.exp: Ditto.
* testsuite/gdb.trace/while-stepping.exp: Ditto.

2001-04-17  Michael Snyder  <msnyder@redhat.com>

* thread-db.c (check_thread_signals): When looping over all
signals, ignore signal zero.
(disable_thread_signals): Ditto.

2001-04-17  Eirik Fuller <eirik@netapp.com>

* thread.c (do_captured_thread_select): Allow the argument to the
thread command to be an expression rather than a literal integer.

* elf32-cris.c: Tweak comments related to dynamic linking.
(cris_elf_relocate_section): When not creating shared object, fill
in the .got table for any symbol not in the dynamic symbol table.
(elf_cris_finish_dynamic_symbol): When not creating shared object,
only emit a .got.rela reloc if the symbol is in the dynamic symbol
table.
(cris_elf_check_relocs): Use variable r_type in all places rather
than the original expression.  Add default case in switch for
reloc types.
(elf_cris_size_dynamic_sections): Iterate over
elf_cris_discard_excess_program_dynamics when not creating shared
library.
  (elf_cris_discard_excess_dso_dynamics): Renamed from
elf_cris_discard_copies.  Correct typo, s/Rel/Rela/.
(elf_cris_discard_excess_program_dynamics): New.

* i386-linux-tdep.c (i386_linux_saved_pc_after_call): Use
read_memory_unsigned_integer instead of read_memory_integer.

* solib-aix5.c (map_index_vs_section_name_okay): New function.
(aix5_relocate_main_executable): Don't use file offsets for
determining corresponding sections and map file entries.  Call
map_index_vs_section_name_okay() to do this instead.

2001-04-16  David O'Brien  <obrien@FreeBSD.org>
* configure.in: Add the em type for FreeBSD targets.
* configure: Regenerate.

Approved by:  Alan Modra <amodra@one.net.au>
              <20010414192409.C16364@squeak.one.net.au>
  Philip Blundell <philb@gnu.org>
  <E14o06W-0002IT-00@kings-cross.london.uk.eu.org>

Add code to retry certain open()s.

Fix date on previous commit.

Make hw watchpoints work with both the 2.4.2 kernel and the 2.4.3 kernel.

sync with egcs

2001-04-16  Daniel Berlin  <dan@cgsoftware.com>

* demangle.c (_initialize_demangler): Use xcalloc on the
demangling_style_names, and make it a null terminated array of
names, to avoid a crash.

Forgot the makefile portion

2001-04-15  Daniel Berlin  <dan@cgsoftware.com>

* ternary.c: New file - Ternary search tree implementation.

2001-04-15  Daniel Berlin  <dan@cgsoftware.com>

* ternary.h: New file - Ternary search tree header.

* i386-tdep.c (i386_frame_chain): New function.
* config/i386/tm-i386.h (FRAME_CHAIN): Redefine in terms of
i386_frame_chain.
(i386_frame_chain): New prototype.

* Makefile.in (simops.o): Add simops.h to dependency list.

* coffcode.h (coff_write_object_contents): Use
bfd_coff_swap_filehdr_out instead of coff_swap_filehdr_out.

2001-04-14  H.J. Lu  <hjl@gnu.org>

* bfd-in2.h: Regenerate.

* target.h (target_ops): Removed to_core_file_to_sym_file vector
function.
* corelow.c (core_ops): Updated for above change.
* gnu-nat.c (core_ops): Likewise.
* inftarg.c (child_ops): Likewise.
* monitor.c (monitor_ops): Likewise.
* ppc-bdm.c (bdm_ppc_ops): Likewise.
* remote-adapt.c (adapt_ops): Likewise.
* remote-bug.c (bug_ops): Likewise.
* remote-e7000.c (e7000_ops): Likewise.
* remote-eb.c (eb_ops): Likewise.
* remote-es.c (es1800_ops, es1800_child_ops): Likewise.
* remote-mm.c (mm_ops): Likewise.
* remote-nindy.c (nindy_ops): Likewise.
* remote-nrom.c (nrom_ops): Likewise.
* remote-os9k.c (rombug_ops): Likewise.
* remote-rdp.c (remote_rdp_ops): Likewise.
* remote-sim.c (gdbsim_ops): Likewise.
* remote-st.c (st2000_ops): Likewise.
* v850ice.c (v850ice_ops): Likewise.
* target.c (cleanup_target): Likewise
(update_current_target): Likewise.
(setup_target_debug): Likewise
(debug_to_core_file_to_sym_file): Removed.

* corefile.c (core_file_command) [HPUXHPPA]: Removed code that
sets symbol file from information obtained from the core file.
* corelow.c (core_file_to_sym_file): Removed.

* section.c (STD_SECTION): Add entsize.

* struc-symbol.h (struct local_symbol): New TC_LOCAL_SYMFIELD_TYPE.
* symbols.c (local_symbol_convert): Call TC_LOCAL_SYMFIELD_CONVERT.

* config/tc-mn10300.c (md_assemble): Simplify offset adjustment of
pc-relative relocations not placed at the end of the instruction.

2001-04-13  H.J. Lu  <hjl@gnu.org>

* section.c (SEC_MERGE): Define new flag for merging.
(SEC_STRINGS): Likewise.
(entsize): New field.

Fix latent bug exposed by a gcc-3 bug fix.
* tc-ia64.c (is_conditional_branch): Return true for br, brl, and br.
excluding br.i.

* coff-i386.c (TARGET_SYM): SEC_READONLY is an applicable section
flag on pe-i386 targets.

2001-04-13  Fernando Nasser  <fnasser@redhat.com>

From  Adam Mirowski  <Adam.Mirowski@Sun.COM>
Fixed Insight on Solaris. It was not possible to debug a process
because of EINTR "errors".
* procfs.c: (procfs_wait): if proc_wait_for_stop() fails
with EINTR, retry the call.

* ld.texinfo: Document --fatal-warnings.
* ld.1: Regenerate.

* ldmisc.c (vfinfo): Set flag to inhibit making executable if
warnings have been turned into errors.
* lexsup.c (OPTION_WARN_FATAL): Define.
(ld_options): Entry for --fatal-warnings.
(parse_args): Handle OPTION_WARN_FATAL.
* ld.h (ld_config_type): Add fatal_warnings field.

bfd/
* libbfd-in.h (_bfd_merge_section): New.
(_bfd_write_merged_section): New.
(_bfd_merged_section_offset): New.
* libbfd.h: Rebuilt.
* linker.c (_bfd_generic_link_output_symbols): Handle
discard_sec_merge.
* aoutx.h (aout_link_write_symbols): Likewise.
* pdp11.c (aout_link_write_symbols): Likewise.
* elflink.h (elf_link_add_object_symbols): Call _bfd_merge_section.
(elf_bfd_final_link): Adjust global symbols pointing into SEC_MERGE
sections.
(elf_link_sec_merge_syms): New.
(elf_link_input_bfd): Call _bfd_merged_section_offset
and _bfd_write_merged_section.
Handle discard_sec_merge.
* elf-bfd.h (struct elf_link_hash_table): Add merge_info
field.
(struct bfd_elf_section_data): Likewise.
* elf.c (_bfd_elf_make_section_from_shdr): Set SEC_MERGE and
SEC_STRINGS section flags and entsize from their ELF counterparts.
(_bfd_elf_link_hash_table_init): Initialize merge_info.
(elf_fake_sections): Set SHF_MERGE, SHF_STRINGS and sh_entsize
from their BFD counterparts.
* merge.c: New file.
* Makefile.am: Add strtab.lo.
* Makefile.in: Rebuilt.
include/
* bfdlink.h (bfd_link_discard): Add discard_sec_merge.
gas/
* config/obj-elf.c (obj_elf_change_section): Add entsize argument,
handle SHF_MERGE and SHF_STRINGS.
(obj_elf_parse_section_letters): Set SHF_MERGE and SHF_STRINGS.
(obj_elf_section): Allow additional argument specifying entity size.
* write.c (adjust_reloc_syms): Keep relocations against local symbols
in SEC_MERGE sections.
ld/
* ldmain.c (main): Default to discard_sec_merge.
* lexsup.c (OPTION_DISCARD_NONE): Define.
(ld_options): Add --discard-none.
(parse_args): Handle OPTION_DISCARD_NONE.
* ldlang.c (wild_doit): SEC_MERGE should be set in the output
section only if SEC_MERGE and SEC_STRINGS flags and entsize of
all its input sections match.

Revise way in which mappings are allocated/searched.

* xcoffread.c (scan_xcoff_symtab): Ignore symbols beginning with
"@".

* config/i386/fbsd.mh (NATDEPFILES): Add i386-nat.o.

    * dwarf2dbg.c (process_entries): Don't optimize redundant line notes.

* mips.igen (CFC1, CTC1): Pass the correct register numbers to
PENDING_FILL.  Use PENDING_SCHED directly to handle the pending
set of the FCSR.
* sim-main.h (COCIDX): Remove definition; this isn't supported by
PENDING_FILL, and you can get the intended effect gracefully by
calling PENDING_SCHED directly.

* ltconfig, ltmain.sh, libtool.m4, ltcf-c.sh, ltcf-cxx.sh,
ltcf-gcj.sh: Upgraded to libtool 1.4a 1.641.2.226.

* expr.c (operand): Pass &c to md_parse_name().
* config/tc-ia64.h, config/tc-ppc.h, config/tc-tic54x.h: Adjust.

Obsolete sun386i.

* MAINTAINERS: Update my email address
* nm.c (print_symbol_info_bsd): Use a simple printf string.

* maint.c: Fix typo in comment.

* MAINTAINERS: Swap with Syd Polk as a gdbtk maintainer.

* elflink.h (elf_fix_symbol_flags): For non-default visibilities,
only hide symbols marked STV_INTERNAL or STV_HIDDEN.

Add comments noting that vfork might be defined to be fork.

Use cleanup machinery to invoke ui_out_list_end().

2001-04-05  Steven J. Hill  <sjhill@cotw.com>

* Makefile.am (ALL_EMULATIONS): Add eelf32ltsmip.o.
(ALL_64_EMULATIONS): Add eelf64btsmip.o and eelf64ltsmip.o.
(eelf32ltsmip.c): New target.
(eelf64btsmip.c): Likewise.
(eelf64ltsmip.c): Likewise.
* Makefile.in: Regenerated.

* configure.tgt (mips*el-*-linux-gnu): Uses traditional MIPS
target.
(mips*-*-linux-gnu*): Likewise.

* emulparams/elf32ltsmip.sh: New. Traditional little endian
MIPS taget.
* emulparams/elf64btsmip.sh: New. Traditional 64bit big endian
target.
* emulparams/elf64ltsmip.sh: New. Traditional 64bit little
endian target.

2001-04-05  Steven J. Hill  <sjhill@cotw.com>

* config.bfd (mips*el*-*-linux-gnu*): Use traditional little
endian MIPS ELF target.
* config.bfd (mips*-*-linux-gnu*): Use traditional big endian
MIPS ELF target.

* configure.in (bfd_elf64_tradbigmips_vec): New. Traditional
64bit big endian MIPS ELF target.
(bfd_elf64_tradlittlemips_vec): New. Traditional 64bit little
endian MIPS ELF target.
* configure: Regenerated.

* elf32-mips.c (IRIX_COMPAT): Handle traditional 64bit and
little endian targets.
(mips_elf_sym_is_global): Handle traditional targets.

* elf64-mips.c (bfd_elf64_tradbigmips_vec): New. Traditional
64bit big endian MIPS ELF target.
(bfd_elf64_tradlittlemips_vec): New. Traditional 64bit little
endian MIPS ELF target.

* targets.c: (_bfd_target_vector): Add bfd_elf64_tradbigmips_vec
and bfd_elf64_tradlittlemips_vec.

2001-04-07  Steven J. Hill  <sjhill@cotw.com>

* config/tc-mips.c: Support ELF64 for traditional MIPS targets.

* Makefile.am: (TARG_ENV_HFILES): Add tc-mips.h.
* Makefile.in: Regenerated.

* configure.in: Use traditional MIPS targets for Linux/MIPS.
* configure: Regenerated.

* dcache.c (dcache_write_line): Fixed bugs where cache line was
not written to target correctly.

* gdbserver/low-hppabsd.c (read_inferior_memory): Add explicit
  void return value;
* gdbserver/low-nbsd.c: Likewise.
* gdbserver/low-sparc.c: Likewise.
* gdbserver/low-sun3.c: Likewise.
---------------------------------------------------------------------

Add self to write-after-approval list.

* config/rs6000/nm-rs6000.h (PTRACE_ATTACH): Don't define.
(PTRACE_DETACH): Don't define.

Correct erroneous ChangeLog.

2001-04-06  David Smith  <dsmith@redhat.com>

* arch-utils.c (default_prepare_to_proceed)
(generic_prepare_to_proceed): Added new functions.
* arch-utils.h: New function declarations for
default_prepare_to_proceed() and generic_prepare_to_proceed().
* gdbarch.sh: Added PREPARE_TO_PROCEED.
* gdbarch.c: Regenerated.
* gdbarch.h: Regenerated.
* inferior.h: Added get_last_target_status() declaration.
* infrun.c (get_last_target_status): Added new function.
(handle_inferior_event): Saves last pid and waitstatus, which will
get returned by get_last_target_status().

* hppa-tdep.c (prepare_to_proceed):  Added comment stating that
prepare_to_proceed() is potentially redundant since
default_prepare_to_proceed() has been added.
* linux-thread.c (prepare_to_proceed): Ditto.
* lin-lwp.c (prepare_to_proceed): Ditto.
* m3-nat.c (prepare_to_proceed): Ditto.