binutils-gdb.git
6 years agoAdd range changing to STABS parsing functions, in order to prevent buffer overruns.
Nick Clifton [Tue, 13 Mar 2018 16:10:45 +0000 (16:10 +0000)]
Add range changing to STABS parsing functions, in order to prevent buffer overruns.

PR 22955
* stabs.c (parse_number): Add p_end parameter and use it to check
the validity of the pp parameter.  Add checks to prevent walking
off the end of the string buffer.
(parse_stab_string): Likewise.
(parse_stab_type): Likewise.
(parse_stab_type_number): Likewise.
(parse_stab_range_type): Likewise.
(parse_stab_sun_builtin_type): Likewise.
(parse_stab_sun_floating_type): Likewise.
(parse_stab_enum_type): Likewise.
(parse_stab_struct_type): Likewise.
(parse_stab_baseclasses): Likewise.
(parse_stab_struct_fields): Likewise.
(parse_stab_cpp_abbrev): Likewise.
(parse_stab_one_struct_field): Likewise.
(parse_stab_members): Likewise.
(parse_stab_tilde_field): Likewise.
(parse_stab_array_type): Likewise.
* parse_stab: Compute the end of the string and then pass it on to
individual parser functions.

6 years agoPrevent memory access violations when attempting to parse an x86_64 PE binary contain...
Nick Clifton [Tue, 13 Mar 2018 14:02:52 +0000 (14:02 +0000)]
Prevent memory access violations when attempting to parse an x86_64 PE binary containing corrupt unwind information.

PR 22113
incldue * coff/pe.h (struct pex64_unwind_info): Add a rawUnwindCodesEnd
field.

bfd * pei-x86_64.c (pex64_get_unwind_info): Change to a boolean
function.  Add an end address parameter.  Check access of the data
pointer to make sure that they do not extend beyond the end
address.  Return FALSE if any check fails.  Add the end address
pointer to the ui structure.
(pex64_xdata_print_uwd_codes): Check accesses of the raw unwind
codes to make sure that they do not extend beyond the end address
pointer.  Print an error message and return immediately if any
check fails.

6 years agoAutomatic date update in version.in
GDB Administrator [Tue, 13 Mar 2018 00:00:24 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agogdb/riscv: Fix some ARI issues
Andrew Burgess [Mon, 12 Mar 2018 21:41:42 +0000 (21:41 +0000)]
gdb/riscv: Fix some ARI issues

Fix some ARI issues in recently added riscv code, the ARI email is:

  https://sourceware.org/ml/gdb-patches/2018-03/msg00156.html

gdb/ChangeLog:

* riscv-tdep.c (riscv_sw_breakpoint_from_kind): Add localization
to error message string.
(riscv_register_name): Use xsnprintf instead of sprintf.
(riscv_insn::fetch_instruction): Use gdb_assert instead of
internal_error.
(riscv_print_arg_location): Use gdb_assert_not_reached instead of
error.
(riscv_push_dummy_call): Likewise.

6 years agoUse gdb::byte_vector when reading section data
Tom Tromey [Fri, 9 Mar 2018 05:28:54 +0000 (22:28 -0700)]
Use gdb::byte_vector when reading section data

This changes a couple of spots that read section data to use
gdb::byte_vector rather than a cleanup.

Regression tested by the buildbot.  I am not certain that the buildbot
actually tests the code in question, so I recommend careful review.

gdb/ChangeLog
2018-03-12  Tom Tromey  <tom@tromey.com>

* rs6000-aix-tdep.c (rs6000_aix_core_xfer_shared_libraries_aix):
Use gdb::byte_vector.
* arm-tdep.c (arm_exidx_new_objfile): Use gdb::byte_vector.

6 years agoFix ia64 GDB build
Yao Qi [Mon, 12 Mar 2018 09:15:39 +0000 (09:15 +0000)]
Fix ia64 GDB build

Commit 849d0ba8 breaks GDB build for ia64 with --with-libunwind-ia64=yes.
This patch fixes it.

gdb:

2018-03-12  Yao Qi  <yao.qi@linaro.org>

* ia64-libunwind-tdep.c (libunwind_get_reg_special): Change
parameter type to readable_regcache.
* ia64-libunwind-tdep.h (libunwind_get_reg_special): Update
the declaration.

6 years agoUse std::vector for field lists in dwarf2read.c
Tom Tromey [Sun, 11 Mar 2018 03:47:06 +0000 (20:47 -0700)]
Use std::vector for field lists in dwarf2read.c

This changes dwarf2read.c to use std::vector rather than a linked list
when managing the fields and base classes to be added to a type.  This
removes some bookkeeping types and also allows the removal of some
cleanups.

gdb/ChangeLog
2018-03-11  Tom Tromey  <tom@tromey.com>

* dwarf2read.c (struct nextfield): Add initializers.
(struct nextfnfield): Remove.
(struct fnfieldlist): Add initializers.  Remove "length" and
"head", use std::vector.
(struct decl_field_list): Remove.
(struct field_info): Add initializers.
<fields, baseclasses>: Now std::vector.
<nbaseclasses, nfnfields, typedef_field_list_count,
nested_types_list_count>: Remove.
(dwarf2_add_field, dwarf2_add_type_defn)
(dwarf2_attach_fields_to_type, dwarf2_add_member_fn)
(dwarf2_attach_fn_fields_to_type, handle_struct_member_die)
(process_structure_scope): Update.

6 years agoRemove cleanup from build_type_psymtabs_1
Tom Tromey [Sun, 25 Feb 2018 18:11:59 +0000 (11:11 -0700)]
Remove cleanup from build_type_psymtabs_1

This removes a cleanup from build_type_psymtabs_1, by using
std::vector rather than manual memory management.

gdb/ChangeLog
2018-03-11  Tom Tromey  <tom@tromey.com>

* dwarf2read.c (sort_tu_by_abbrev_offset): Change to be suitable
for use by std::sort.
(build_type_psymtabs_1): Use std::vector.

6 years agoAutomatic date update in version.in
GDB Administrator [Mon, 12 Mar 2018 00:00:40 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoAutomatic date update in version.in
GDB Administrator [Sun, 11 Mar 2018 00:01:12 +0000 (00:01 +0000)]
Automatic date update in version.in

6 years agoAutomatic date update in version.in
GDB Administrator [Sat, 10 Mar 2018 00:00:30 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agox86: Encode EVEX instructions with VEX128 if possible
H.J. Lu [Fri, 9 Mar 2018 16:10:27 +0000 (08:10 -0800)]
x86: Encode EVEX instructions with VEX128 if possible

If EVEX encoding isn't required, we can encode EVEX instructions with
VEX128.

* config/tc-i386.c (optimize_encoding): Encode EVEX instructions
with VEX128 if EVEX encoding isn't required.
* testsuite/gas/i386/optimize-1.d: Updated.
* testsuite/gas/i386/x86-64-optimize-2.d: Likewise.

6 years agoFix Sparc, s390 and AArch64 targets so that they can handle relocs against ifunc...
Nick Clifton [Fri, 9 Mar 2018 14:37:36 +0000 (14:37 +0000)]
Fix Sparc, s390 and AArch64 targets so that they can handle relocs against ifunc symbols found in note sections.

  Following on from PR 22929, I have found the same problem exists with
  other ifunc supporting targets too.  Plus see this link for the bug
  being reported against the s390x binutils for Fedora rawhide:

     https://bugzilla.redhat.com/show_bug.cgi?id=1553705

  So I am going to check in the patch below which applies the same
  change that H.J. made for the x86_64 target to the other affected
  targets.  (Specifically: S390, AArch64 and Sparc).  Plus it adds a new
  test to the linker testsuite to make sure that this problem stays
  fixed.

bfd * elf64-s390.c (elf_s390_relocate_section): Move check for
relocations against non-allocated sections to before the code that
handles ifunc relocations.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Treat
relocs against IFUNC symbols in non-allocated sections as relocs
against FUNC symbols.
* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.

ld * testsuite/ld-ifunc/ifuncmod5.s: New test.  Checks that targets
that support IFUNC symbols can handle relocations against those
symbols in NOTE sections.
* testsuite/ld-ifunc/ifuncmod5.d: New file:  Driver for the new
test.
* testsuite/ld-ifunc/ifunc.exp: Run the new test.

6 years agoUpdate "gdb --configuration" with recently added features
Eli Zaretskii [Fri, 9 Mar 2018 13:59:11 +0000 (15:59 +0200)]
Update "gdb --configuration" with recently added features

This adds display of a few recently added optional features.

gdb/ChangeLog:
2018-03-09  Eli Zaretskii  <eliz@gnu.org>

* top.c (print_gdb_configuration): Reflect LIBIPT, LIBMEMCHECK,
and LIBMPFR in the printed configuration.

6 years agox86: Strip whitespace in check_VecOperations
H.J. Lu [Fri, 9 Mar 2018 11:51:19 +0000 (03:51 -0800)]
x86: Strip whitespace in check_VecOperations

Since the addition of pseudo prefixes changed how the scrubber treats
'{', we need to explicitly strip whitespace in check_VecOperations ().

* config/tc-i386.c (check_VecOperations): Strip whitespace.
* testsuite/gas/i386/optimize-1.s: Add whitespaces before
{%k7} and {z},
* testsuite/gas/i386/x86-64-optimize-2.s: Likewise.

6 years agoUse scoped_fd in more places
Tom Tromey [Thu, 22 Feb 2018 22:21:42 +0000 (15:21 -0700)]
Use scoped_fd in more places

This changes a few more places to use scoped_fd.  This allows the
removal of some cleanups.

Regression tested by the buildbot, though note that I'm not sure
whether the buildbot actually builds anything using all of these
files.

gdb/ChangeLog
2018-03-08  Tom Tromey  <tom@tromey.com>

* source.c (get_filename_and_charpos): Use scoped_fd.
* nto-procfs.c (procfs_open_1): Use scoped_fd.
(procfs_pidlist): Likewise.
* procfs.c (proc_get_LDT_entry): Use scoped_fd.
(iterate_over_mappings): Likewise.

6 years agoChange enable_thread_stack_temporaries to an RAII class
Tom Tromey [Wed, 7 Mar 2018 22:55:01 +0000 (15:55 -0700)]
Change enable_thread_stack_temporaries to an RAII class

This started as a patch to change enable_thread_stack_temporaries to
be an RAII class, but then I noticed that this code used a VEC, so I
went ahead and did a bit more C++-ification, changing
stack_temporaries_enabled to a bool and changing stack_temporaries to
a std::vector.

Regression tested by the buildbot.

gdb/ChangeLog
2018-03-08  Tom Tromey  <tom@tromey.com>

* infcall.c (struct call_return_meta_info)
<stack_temporaries_enabled>: Remove.
(get_call_return_value, call_function_by_hand_dummy): Update.
* thread.c (disable_thread_stack_temporaries): Remove.
(enable_thread_stack_temporaries): Remove.
(thread_stack_temporaries_enabled_p): Return bool.
(push_thread_stack_temporary, value_in_thread_stack_temporaries)
(get_last_thread_stack_temporary): Update.
* eval.c (evaluate_subexp): Update.
* gdbthread.h (class enable_thread_stack_temporaries): Now a
class, not a function.
(value_ptr, value_vec): Remove typedefs.
(class thread_info) <stack_temporaries_enabled>: Now bool.
<stack_temporaries>: Now a std::vector.
(thread_stack_temporaries_enabled_p)
(value_in_thread_stack_temporaries): Return bool.

6 years agox86: Optimize with EVEX128 encoding for AVX512VL
H.J. Lu [Fri, 9 Mar 2018 03:57:35 +0000 (19:57 -0800)]
x86: Optimize with EVEX128 encoding for AVX512VL

We can optimize AVX512 instructions with EVEX128 only if AVX512VL is
enabled:

1. Instruction is an AVX512VL instruction. Or
2. AVX512VL is enabled explicitly by -march=+avx512vl/".arch .avx512vl".

We should optimize EVEX instructions with EVEX128 encoding when pseudo
{evex} prefix is used.

* config/tc-i386.c (set_cpu_arch): Set cpu_arch_isa_flags.
(md_parse_option): Likewise.
(optimize_encoding): Check i.tm.cpu_flags and cpu_arch_isa_flags
for cpuavx512vl instead of cpu_arch_flags.  Optimize EVEX with
EVEX128 when EVEX encoding is required.
* testsuite/gas/i386/i386.exp: Run optimize-4, optimize-5,
x86-64-optimize-5 and x86-64-optimize-6.
* testsuite/gas/i386/optimize-1.d: Updated.
* testsuite/gas/i386/x86-64-optimize-2.d: Likewise.
* testsuite/gas/i386/optimize-4.d: New file.
* testsuite/gas/i386/optimize-4.s: Likewise.
* testsuite/gas/i386/optimize-5.d: Likewise.
* testsuite/gas/i386/optimize-5.s: Likewise.
* testsuite/gas/i386/x86-64-optimize-5.d: Likewise.
* testsuite/gas/i386/x86-64-optimize-5.s: Likewise.
* testsuite/gas/i386/x86-64-optimize-6.d: Likewise.
* testsuite/gas/i386/x86-64-optimize-6.s: Likewise.

6 years agoFix misreporting of omitted bytes for large remote packets
Simon Marchi [Fri, 9 Mar 2018 00:00:03 +0000 (19:00 -0500)]
Fix misreporting of omitted bytes for large remote packets

In remote.c, when the output of "set debug remote" is truncated, the
number of characters reported is incorrect.  What is reported is the
number of characters added by the quoting, not the number of characters
that were truncated.

gdb/ChangeLog:

* remote.c (putpkt_binary): Fix omitted bytes reporting.
(getpkt_or_notif_sane_1): Likewise.

6 years agoAutomatic date update in version.in
GDB Administrator [Fri, 9 Mar 2018 00:00:30 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoUse std::string to simplify build_id_to_debug_bfd
Simon Marchi [Thu, 8 Mar 2018 23:57:53 +0000 (18:57 -0500)]
Use std::string to simplify build_id_to_debug_bfd

Using std::string here makes the string building simpler thank playing
with char*.  A stack allocation is replaced with heap allocation, but
I don't think this is really performance-critical code.

gdb/ChangeLog:

* build-id.c (build_id_to_debug_bfd): Use std::string.

6 years agoMake find_separate_debug_file* return std::string
Simon Marchi [Thu, 8 Mar 2018 23:56:23 +0000 (18:56 -0500)]
Make find_separate_debug_file* return std::string

This patch makes the find_separate_debug_file* functions return
std::string, which allows to get rid of some manual memory management
and one cleanup.

gdb/ChangeLog:

* build-id.c (find_separate_debug_file_by_buildid): Return
std::string.
* build-id.h (find_separate_debug_file_by_buildid): Return
std::string.
* coffread.c (coff_symfile_read): Adjust to std::string.
* elfread.c (elf_symfile_read): Adjust to std::string.
* symfile.c (separate_debug_file_exists): Change parameter to
std::string.
(find_separate_debug_file): Return std::string.
(find_separate_debug_file_by_debuglink): Return std::string.
* symfile.h (find_separate_debug_file_by_debuglink): Return
std::string.

6 years agoAdd xml_escape_text_append and use it
Simon Marchi [Thu, 8 Mar 2018 23:04:46 +0000 (18:04 -0500)]
Add xml_escape_text_append and use it

[This patch should go on top of "linux_qxfer_libraries_svr4: Use
 std::string", I should have sent them together as a series.]

I noticed that linux_qxfer_libraries_svr4 used xml_escape_text, which
returns an std::string.  That string is then copied into a larger
buffer.  It would be more efficient if we had a version of
xml_escape_text which appended to an existing string instead of
returning a new one.  This is what this patch does.

I manually verified that the output of linux_qxfer_libraries_svr4 didn't
change before/after the patch.

gdb/ChangeLog:

* common/xml-utils.c (xml_escape_text): Move code to...
(xml_escape_text_append): ... this new function.
* common/xml-utils.h (xml_escape_text_append): New declaration.
* unittests/xml-utils-selftests.c (test_xml_escape_text_append):
New function.
(_initialize_xml_utils): register test_xml_escape_text_append as
a selftest.

gdb/gdbserver/ChangeLog:

* linux-low.c (linux_qxfer_libraries_svr4): Use
xml_escape_text_append.

6 years agolinux_qxfer_libraries_svr4: Use std::string
Simon Marchi [Thu, 8 Mar 2018 23:04:07 +0000 (18:04 -0500)]
linux_qxfer_libraries_svr4: Use std::string

Use std::string, removing some manual memory management.

gdb/gdbserver/ChangeLog:

* linux-low.c (linux_qxfer_libraries_svr4): Use std::string.

6 years agoremote-stdio-gdbserver: Pass "target" to remote_exec to delete file
Simon Marchi [Thu, 8 Mar 2018 22:54:25 +0000 (17:54 -0500)]
remote-stdio-gdbserver: Pass "target" to remote_exec to delete file

As described here

  https://sourceware.org/bugzilla/show_bug.cgi?id=22841

there seems to be situations where the remote-stdio-gdbserver board
fails to delete the uploaded binary file.  Passing "target" fixes the
issue for Christian who reported the bug.

I did not experience this problem, but passing "target" to remote_exec
still works for me, so I'm fine with changing it.

Any objection?

gdb/testsuite/ChangeLog:

PR gdb/22841
* boards/remote-stdio-gdbserver.exp (${board}_file): Pass
"target" to remote_exec.

6 years agoDon't redefine upload/download/file in gdbserver-base
Simon Marchi [Thu, 8 Mar 2018 22:53:57 +0000 (17:53 -0500)]
Don't redefine upload/download/file in gdbserver-base

Before patch

  Make native gdbserver boards no longer be "remote" (in DejaGnu terms)
  739b3f1d8ff7072dcc66240c25b026c6433bda1a

the local gdbserver boards (except native-extended-gdbserver...) were
considered as remote by DejaGNU.  To avoid DejaGNU trying to use ssh/scp
to download the files to the target (which is actually local), the
gdbserver-base.exp file defined some _download, _upload and _file board
operations to override the default behavior, and instead just use local
operations.

The same patch also changed remote-stdio-gdbserver.exp to make it
inherit from gdbserver-base.exp.  Since then, this board (which is
actually remote) uses the overrides with local file operations.  As a
result, files are never actually copied to the target.

I think we can simply remove the overrides from gdbserver-base.exp.
Because all boards should be properly considered local or remote by
DejaGNU, it should by default use the right method for transferring
files.

gdb/testsuite/ChangeLog:

PR gdb/22841
* boards/gdbserver-base.exp (${board}_file, ${board}_download,
${board}_upload): Remove.

6 years agox86-64: Also optimize "clr reg64"
H.J. Lu [Thu, 8 Mar 2018 14:41:34 +0000 (06:41 -0800)]
x86-64: Also optimize "clr reg64"

"clr reg" is an alias of "xor reg, reg".  We can encode "clr reg64" as
"xor reg32, reg32".

gas/

* config/tc-i386.c (optimize_encoding): Also encode "clr reg64"
as "xor reg32, reg32".
* testsuite/gas/i386/x86-64-optimize-1.s: Add "clr reg64" tests.
* testsuite/gas/i386/x86-64-optimize-1.d: Updated.

opcodes/

* i386-opc.tbl: Add Optimize to clr.
* i386-tbl.h: Regenerated.

6 years agox86: Treat relocation against IFUNC symbol as FUNC
H.J. Lu [Thu, 8 Mar 2018 14:36:40 +0000 (06:36 -0800)]
x86: Treat relocation against IFUNC symbol as FUNC

When resolving a relocation against IFUNC symbol in a SHT_NOTE section
without SHF_ALLOC, we treat it as relocation against FUNC symbol since
it needs the address of IFUNC symbol, not the address returned by IFUNC
function.

bfd/

PR ld/22929
* elf32-i386.c (elf_i386_relocate_section): Treat relocation
against IFUNC symbol in SHT_NOTE section without SHF_ALLOC as
relocation against FUNC symbol.
* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.

ld/

PR ld/22929
* testsuite/ld-i386/i386.exp: Run PR ld/22929 test.
* testsuite/ld-x86-64/x86-64.exp: Likewise.
* testsuite/ld-i386/pr22929.d: New file.
* testsuite/ld-i386/pr22929.s: Likewise.
* testsuite/ld-x86-64/pr22929.d: Likewise.
* testsuite/ld-x86-64/pr22929.s: Likewise.

6 years agox86: Remove support for old (<= 2.8.1) versions of gcc
H.J. Lu [Thu, 8 Mar 2018 14:31:32 +0000 (06:31 -0800)]
x86: Remove support for old (<= 2.8.1) versions of gcc

Old (<= 2.8.1) versions of gcc generate broken fsubp, fsubrp, fdivp and
fdivrp instructions.  Assembler translates them to correct ones with a
warning:

[hjl@gnu-cfl-1 gas]$ cat x.s
fsubp %st(3),%st
[hjl@gnu-cfl-1 gas]$ gcc -c x.s
x.s: Assembler messages:
x.s:1: Warning: translating to `fsubp %st,%st(3)'
[hjl@gnu-cfl-1 gas]$

This patch removes support for old (<= 2.8.1) versions of gcc:

[hjl@gnu-cfl-1 gas]$ ./as-new -o x.o x.s
x.s: Assembler messages:
x.s:1: Error: operand type mismatch for `fsubp'
[hjl@gnu-cfl-1 gas]$

gas/

* NEWS: Mention -mold-gcc removal.
* config/tc-i386.c (i386_error): Remove old_gcc_only.
(old_gcc): Removed.
(match_template): Remove old gcc support.
(OPTION_MOLD_GCC): Removed.
(OPTION_MRELAX_RELOCATIONS): Updated.
(md_longopts): Remove OPTION_MOLD_GCC.
(md_parse_option): Likewise.
(md_show_usage): Remove -mold-gcc.
* testsuite/gas/i386/general.s: Convert fsub/fdiv tests for old
(<= 2.8.1) versions of gcc.
* testsuite/gas/i386/intel.s: Likewise.
* testsuite/gas/i386/general.l: Updated.
* testsuite/gas/i386/intel-intel.d: Likewise.
* testsuite/gas/i386/intel.d: Likewise.
* testsuite/gas/i386/intel.e: Likewise.
* testsuite/gas/i386/i386.exp: Don't pass -mold-gcc to general.

include/

* opcode/i386 (OLDGCC_COMPAT): Removed.

opcodes/

* i386-gen.c (opcode_modifiers): Remove OldGcc.
* i386-opc.h (OldGcc): Removed.
(i386_opcode_modifier): Remove oldgcc.
* i386-opc.tbl: Remove fsubp, fsubrp, fdivp and fdivrp
instructions for old (<= 2.8.1) versions of gcc.
* i386-tbl.h: Regenerated.

6 years agoRemove MAX_REGISTER_SIZE define
Alan Hayward [Thu, 8 Mar 2018 09:42:21 +0000 (09:42 +0000)]
Remove MAX_REGISTER_SIZE define

gdb/
* defs.h: Remove MAX_REGISTER_SIZE.
* regcache.c (init_regcache_descr): Remove MAX_REGISTER_SIZE
asserts.
* python/py-unwind.c (pyuw_sniffer): Likewise.

6 years agox86: fold several AVX512VL templates
Jan Beulich [Thu, 8 Mar 2018 07:58:55 +0000 (08:58 +0100)]
x86: fold several AVX512VL templates

The differences between some of the register and memory forms of the
same insn often don't really require the templates to be separate. For
example, Disp8MemShift is simply irrelevant to register forms. Fold
these as far as possible, and also fold register-only forms. Further
folding is possible, but needs other prereq work done first.

A note regarding EVEXDYN: This is intended to be used only when no other
properties of the template would make is_evex_encoding() return true. In
all "normal" cases I think it is preferable to omit this indicator, to
keep the table half way readable.

6 years agox86: fold certain AVX512 rotate and shift templates
Jan Beulich [Thu, 8 Mar 2018 07:58:05 +0000 (08:58 +0100)]
x86: fold certain AVX512 rotate and shift templates

Their memory forms were bogusly using VexLWP instead of VexNDD. Adjust
VexNDD handling to cope with these, allowing their register and memory
forms to be folded.

6 years agox86: fold VEX-encoded GFNI templates
Jan Beulich [Thu, 8 Mar 2018 07:57:19 +0000 (08:57 +0100)]
x86: fold VEX-encoded GFNI templates

6 years agox86: fold a few AVX512F templates
Jan Beulich [Thu, 8 Mar 2018 07:56:47 +0000 (08:56 +0100)]
x86: fold a few AVX512F templates

The differences between some of the register and memory forms of the
same insn often don't really require the templates to be separate. For
example, Disp8MemShift is simply irrelevant to register forms. Fold them
as far as possible. Further folding is possible, but needs other prereq
work done first.

6 years agox86: fold LWP templates
Jan Beulich [Thu, 8 Mar 2018 07:56:08 +0000 (08:56 +0100)]
x86: fold LWP templates

Also drop the no longer necessary explicit Disp<N> from them.

6 years agox86: fold FMA and FMA4 templates
Jan Beulich [Thu, 8 Mar 2018 07:55:37 +0000 (08:55 +0100)]
x86: fold FMA and FMA4 templates

6 years agox86: drop {X,Y,Z}MMWORD_MNEM_SUFFIX
Jan Beulich [Thu, 8 Mar 2018 07:52:27 +0000 (08:52 +0100)]
x86: drop {X,Y,Z}MMWORD_MNEM_SUFFIX

They aren't really useful (anymore?): The conflicting operand size check
isn't applicable to any insn validly using respective memory operand
sizes (and if they're used wrongly, another error would result), and the
logic in process_suffix() can be easily changed to work without them.

While re-structuring conditionals in process_suffix() also drop the
CMPXCHG8B special case in favor of a NoRex64 attribute in the opcode
table.

6 years agox86: correct operand size match checks for BMI/BMI2 insns
Jan Beulich [Thu, 8 Mar 2018 07:51:18 +0000 (08:51 +0100)]
x86: correct operand size match checks for BMI/BMI2 insns

Some BMI/BMI2 insns allow their middle operands to be a memory one. In
such a case, matching register types between operands 0 and 1 as well as
1 and 2 won't help - operands 0 and 2 also need to be checked.

6 years agox86: fold redundant expressions in process_suffix()
Jan Beulich [Thu, 8 Mar 2018 07:50:13 +0000 (08:50 +0100)]
x86: fold redundant expressions in process_suffix()

There's no point repeatedly evaluating i.types[op].bitfield.reg.

6 years agox86: simplify result processing of cpu_flags_match()
Jan Beulich [Thu, 8 Mar 2018 07:48:10 +0000 (08:48 +0100)]
x86: simplify result processing of cpu_flags_match()

Make more obvious what the success and failure paths are, and in
particular that what used to be at the "skip" label can't be reached
by what used to be straight line code.

6 years agox86: add GFNI, VAES, and VPCLMUL checking to cpu_flags_match()
Jan Beulich [Thu, 8 Mar 2018 07:47:32 +0000 (08:47 +0100)]
x86: add GFNI, VAES, and VPCLMUL checking to cpu_flags_match()

Just like for the AVX/AES and AVX/PCLMUL combinations, AVX/GFN,
AVX512F/GFNI, AVX512F/VAES, and AVX512F/PCLMUL need special handling to
deal with the pair of required checks specified in the templates.

6 years agox86: change AVX512VL handling in cpu_flags_match()
Jan Beulich [Thu, 8 Mar 2018 07:45:56 +0000 (08:45 +0100)]
x86: change AVX512VL handling in cpu_flags_match()

In order to add an AVX512F counterpart to the present AVX checking, it
is better to move the AVX512VL check out of the conditional it's
currently in.

6 years agox86: drop CPU_FLAGS_32BIT_MATCH
Jan Beulich [Thu, 8 Mar 2018 07:45:25 +0000 (08:45 +0100)]
x86: drop CPU_FLAGS_32BIT_MATCH

It has become a plain alias of CPU_FLAGS_ARCH_MATCH now.

6 years agox86: simplify AVX checks in cpu_flags_match()
Jan Beulich [Thu, 8 Mar 2018 07:44:52 +0000 (08:44 +0100)]
x86: simplify AVX checks in cpu_flags_match()

No caller cares about the specifics of CPU_FLAGS_{AES,AVX,PCLMUL}_MATCH,
so drop those and fold the nested if()-s.

6 years agox86: avoid cpu_flags_match() bogusly setting CPU_FLAGS_ARCH_MATCH
Jan Beulich [Thu, 8 Mar 2018 07:44:12 +0000 (08:44 +0100)]
x86: avoid cpu_flags_match() bogusly setting CPU_FLAGS_ARCH_MATCH

6 years agox86: drop bogus NoAVX
Jan Beulich [Thu, 8 Mar 2018 07:36:41 +0000 (08:36 +0100)]
x86: drop bogus NoAVX

These are meaningful only for insns with CpuSSE* (and a few other Cpu*)
attribute.

6 years agox86: avoid SSE check for LDMXCSR/STMXCSR
Jan Beulich [Thu, 8 Mar 2018 07:35:48 +0000 (08:35 +0100)]
x86: avoid SSE check for LDMXCSR/STMXCSR

Neither touches any XMM register, so the check is pointless. It is imo
even questionable whether in SSE2AVX mode the two should be converted to
their AVX counterparts.

6 years agox86: extend SSE check to PCLMULQDQ, AES, and GFNI insns
Jan Beulich [Thu, 8 Mar 2018 07:35:01 +0000 (08:35 +0100)]
x86: extend SSE check to PCLMULQDQ, AES, and GFNI insns

When aiming at not mixing SSE and AVX insns, these should be warned
about the same way other non-AVX ones are treated.

6 years agox86: drop FloatD
Jan Beulich [Thu, 8 Mar 2018 07:34:09 +0000 (08:34 +0100)]
x86: drop FloatD

It can be expressed by D, when making the consumer look at operand size
to tell apart both uses.

6 years agox86/Intel: correct disassembly of fsub*/fdiv*
Jan Beulich [Thu, 8 Mar 2018 07:33:06 +0000 (08:33 +0100)]
x86/Intel: correct disassembly of fsub*/fdiv*

fsub/fsubr/fsubp/fsubrp as well as fdiv/fdivr/fdivp/fdivrp disassembly
should match (a) the Intel SDM and (b) respective input fed to gas (both
of course with the exception of when we intentionally convert bogus
insns, accompanied by a warning).

6 years agox86: adjust 4-XMM-register-group related warning
Jan Beulich [Thu, 8 Mar 2018 07:27:28 +0000 (08:27 +0100)]
x86: adjust 4-XMM-register-group related warning

Drop "second": For one there's no other source register (the other
source operand is in memory), and in Intel syntax such numbering would
also be wrong.

Take the opportunity and also
- properly place declarations ahead of statements
- use %u format for unsigned int arguments
- fix indentation

6 years agox86: bogus VMOVD with 64-bit operands should only allow for registers
Jan Beulich [Thu, 8 Mar 2018 07:26:35 +0000 (08:26 +0100)]
x86: bogus VMOVD with 64-bit operands should only allow for registers

These templates exist solely to satisfy gcc's needs, and gcc only
produces these with register operands.

6 years agox86: fold AVX vcvtpd2ps memory forms
Jan Beulich [Thu, 8 Mar 2018 07:25:31 +0000 (08:25 +0100)]
x86: fold AVX vcvtpd2ps memory forms

This requires a change to ModR/M handling: Recording of displacement
types must not discard operand size information. Change the respective
code to alter only .disp<N>.

6 years agoReally remove unnecessary power9 group terminating nop
Alan Modra [Thu, 8 Mar 2018 04:04:09 +0000 (14:34 +1030)]
Really remove unnecessary power9 group terminating nop

Oops, not tested well enough.  -mpower9 sets all the PPC_OPCODE_POWERn
for n <= 9.

* config/tc-ppc.c (ppc_handle_align): Correct last patch.  Really
don't emit a group terminating nop for power9.  Simplify cpu
tests.

6 years agoRemove unnecessary power9 group terminating nop
Alan Modra [Wed, 7 Mar 2018 23:47:41 +0000 (10:17 +1030)]
Remove unnecessary power9 group terminating nop

Power9 doesn't have a group terminating nop, so we may as well emit a
normal nop for power9.  Not that it matters a great deal, I believe
ori 2,2,0 will be treated exactly as ori 0,0,0 by the hardware.

* config/tc-ppc.c (ppc_handle_align): Don't emit a group
terminating nop for power9.

6 years agoFix PR binutils/22923.
Paul Pluzhnikov [Thu, 8 Mar 2018 02:16:34 +0000 (18:16 -0800)]
Fix PR binutils/22923.

A static buffer in get_ver_flags may overflow when e.g. German translation
is longer than English original. Avoid that by expanding the buffer.

6 years agoAutomatic date update in version.in
GDB Administrator [Thu, 8 Mar 2018 00:00:42 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoReturn gdb::optional<std::string> from target_fileio_readlink
Tom Tromey [Thu, 23 Nov 2017 06:37:38 +0000 (23:37 -0700)]
Return gdb::optional<std::string> from target_fileio_readlink

This changes to_fileio_readlink and target_fileio_readlink to return a
gdb::optional<std::sring>, and then fixes up the callers and
implementations.  This allows the removal of some cleanups.

Regression tested by the buildbot.

gdb/ChangeLog
2018-03-07  Tom Tromey  <tom@tromey.com>

* linux-tdep.c (linux_info_proc): Update.
* target.h (struct target_ops) <to_fileio_readlink>: Return
optional<string>.
(target_fileio_readlink): Return optional<string>.
* remote.c (remote_hostio_readlink): Return optional<string>.
* inf-child.c (inf_child_fileio_readlink): Return
optional<string>.
* target.c (target_fileio_readlink): Return optional<string>.

6 years agoxtensa: ld: support -z relro
Max Filippov [Tue, 6 Mar 2018 05:49:35 +0000 (21:49 -0800)]
xtensa: ld: support -z relro

ld/
2018-03-07  Max Filippov  <jcmvbkbc@gmail.com>

* emulparams/elf32xtensa.sh (COMMONPAGESIZE): Define.

6 years agoNew option -z,keep-text-section prefix.
Sriraman Tallam [Wed, 7 Mar 2018 20:15:49 +0000 (12:15 -0800)]
New option -z,keep-text-section prefix.

This option does not merge certain text sections with prefixes
.text.hot, .text.unlikely, .text.startup and .text.exit.

* layout.cc (Layout::default_section_order): Check for text section
prefixes.
(Layout::text_section_name_mapping): New static member.
(Layout::text_section_name_mapping_count): New static member.
(Layout::match_section_name): New static function.
(Layout::output_section_name): Check for text section prefixes.
* layout.h (Output_section_order::ORDER_TEXT_HOT): New enum value.
(Output_section_order::ORDER_TEXT_STARTUP): New enum value.
(Output_section_order::ORDER_TEXT_EXIT): New enum value.
(Output_section_order::ORDER_TEXT_UNLIKELY): New enum value.
(Layout::text_section_name_mapping): New static member.
(Layout::text_section_name_mapping_count): New static member.
(Layout::match_section_name): New static function.
* options.h (keep_text_section_prefix): New -z option.
* testsuite/Makefile.am (keep_text_section_prefix): New test.
* testsuite/Makefile.in: Regenerate.
* testsuite/keep_text_section_prefix.cc: New test source.
* testsuite/keep_text_section_prefix.sh: New test script.

6 years agogdb: Add riscv to list of architectures with a save_reggroup
Andrew Burgess [Tue, 6 Mar 2018 16:27:13 +0000 (16:27 +0000)]
gdb: Add riscv to list of architectures with a save_reggroup

The regcache cooked_read test needs to know which architectures have a
save_reggroup, riscv does and needs adding to the list.

gdb/ChangeLog:

* regcache.c (cooked_read_test): Add riscv to the list of
architectures that have a save_reggroup.

6 years ago[PR20402][LD][AARCH64]Don't emit RELATIVE relocation for absolute symbols which are...
Renlin Li [Wed, 7 Mar 2018 09:27:45 +0000 (09:27 +0000)]
[PR20402][LD][AARCH64]Don't emit RELATIVE relocation for absolute symbols which are resolved at static linking time.

For absolute symbols which are forced local or not dynamic, the ABS relocation
should be resolved at static linking time.

Originally, an RELATIVE/ABS relocation will be generated even for absolution
symbols for the dynamic linker to resolve.

bfd/

2018-03-07  Renlin Li  <renlin.li@arm.com>

PR ld/20402
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Check absolute symbol,
and don't emit relocation in specific case.

ld/

2018-03-07  Renlin Li  <renlin.li@arm.com>

PR ld/20402
* testsuite/ld-aarch64/aarch64-elf.exp: Run new test.
* testsuite/ld-aarch64/pr20402.s: New.
* testsuite/ld-aarch64/pr20402.d: New.

6 years agoFix watching structs in C++
Andreas Arnez [Wed, 7 Mar 2018 13:29:19 +0000 (14:29 +0100)]
Fix watching structs in C++

Some of the watchpoint logic depends on the fact that the head of the
value chain represents the user-specified value to watch.  Thus no
additional values should be added to the value chain after that.  However,
if a watchpoint is defined for a C++ structure/class object, then run-time
type information (RTTI) may be present.  Thus, while constructing the
value chain for the watchpoint, the dynamic type is fetched by
gnuv3_rrti_type, which invokes value_addr, which then adds a new value to
the head of the value chain.  This new value represents the pointer to the
structure instead of the structure itself.

With such a "polluted" value chain the watchpoint logic does not recognize
when the user intended to watch a struct, and can_use_hardware_watchpoint
returns zero.  Instead of a hardware watchpoint, a software watchpoint
will then be set for no apparent reason.

This is fixed by adding an early exit to gnuv3_rtti_type when the input
value is not a dynamic class object.

gdb/testsuite/ChangeLog:

* gdb.cp/watch-cp.cc: New test.
* gdb.cp/watch-cp.exp: New file.

gdb/ChangeLog:

* gnu-v3-abi.c (gnuv3_rtti_type): Add early exit if the given
value is not a dynamic class object.

6 years agox86: Rewrite NOP generation for fill and alignment
H.J. Lu [Wed, 7 Mar 2018 12:18:45 +0000 (04:18 -0800)]
x86: Rewrite NOP generation for fill and alignment

Rewrite NOP generation for fill and code alignment by:

1. Add a 11-byte NOP with another 0x66 prefix.
2. Remove the multi-byte NOP entries which consist of 2 instructions.
3. Select proper NOPs based on ISA and processor tuning.
4. Generate multiple NOPs with the longer NOPs first followed by the
shorter NOP.
5. Use jump for larger NOP padding:
   a. > 8 bytes (2 NOPs) in 16-bit mode.
   b. > 14 bytes (2 NOPs) for older processors.
   c. > 77 bytes (7 NOPs) for newer processors.
6. Update MAX_MEM_FOR_RS_ALIGN_CODE to 4095.

PR gas/22874
* config/tc-i386.c (f32_5): Removed.
(f32_8): Likewise.
(f32_9): Likewise.
(f32_10): Likewise.
(f32_11): Likewise.
(f32_12): Likewise.
(f32_13): Likewise.
(f32_14): Likewise.
(f16_5): Likewise.
(f16_6): Likewise.
(f16_7): Likewise.
(f16_8): Likewise.
(jump_31): Likewise.
(alt64_11): Likewise.
(alt64_patt): Likewise.
(jump_disp8): New.
(jump32_disp32): Likewise.
(jump16_disp32): Likewise.
(alt_11): Likewise.
(f32_patt): Updated.
(f16_patt): Likewise.
(alt_patt): Add alt_11.
(i386_align_code): Merged with ...
(i386_generate_nops): This.  Rewritten.
(fits_in_imm7): Moved before i386_generate_nops.
(fits_in_imm31): Likewise.
* config/tc-i386.h (MAX_MEM_FOR_RS_ALIGN_CODE): Updated to
4095.
(i386_align_code): Removed.
(HANDLE_ALIGN): Rewritten with i386_generate_nops.
* doc/as.texinfo: Update limits of control byte for x86 .nops
directive.
* testsuite/gas/i386/i386.exp: Run nops-7 and x86-64-nops-7.
* gas/testsuite/gas/i386/noavx-3.l: Updated.
* gas/testsuite/gas/i386/nop-1.d: Likewise.
* gas/testsuite/gas/i386/nop-1.s: Likewise.
* gas/testsuite/gas/i386/nop-2.d: Likewise.
* gas/testsuite/gas/i386/nop-2.s: Likewise.
* gas/testsuite/gas/i386/nop-3.d: Likewise.
* gas/testsuite/gas/i386/nop-4.d: Likewise.
* gas/testsuite/gas/i386/nop-5.d: Likewise.
* gas/testsuite/gas/i386/nop-5.s: Likewise.
* gas/testsuite/gas/i386/nop-6.d: Likewise.
* gas/testsuite/gas/i386/nop-bad-1.l: Likewise.
* gas/testsuite/gas/i386/nops-1-core2.d: Likewise.
* gas/testsuite/gas/i386/nops-1-i386-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-1-i386.d: Likewise.
* gas/testsuite/gas/i386/nops-1-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-1-k8.d: Likewise.
* gas/testsuite/gas/i386/nops-1.d: Likewise.
* gas/testsuite/gas/i386/nops-2-core2.d: Likewise.
* gas/testsuite/gas/i386/nops-2-i386.d: Likewise.
* gas/testsuite/gas/i386/nops-2.d: Likewise.
* gas/testsuite/gas/i386/nops-3-i386.d: Likewise.
* gas/testsuite/gas/i386/nops-3-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-3.d: Likewise.
* gas/testsuite/gas/i386/nops-4-i386.d: Likewise.
* gas/testsuite/gas/i386/nops-4-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-4.d: Likewise.
* gas/testsuite/gas/i386/nops-4a-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-5-i686.d: Likewise.
* gas/testsuite/gas/i386/nops-5.d: Likewise.
* gas/testsuite/gas/i386/nops-6.d: Likewise.
* gas/testsuite/gas/i386/nops16-1.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nop-1.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nop-2.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nop-5.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-1-core2.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-1-g64.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-1-k8.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-1-pentium.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-1.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-2.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-3.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-4-core2.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-4-k8.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-4.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-5-k8.d: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-5.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-core2.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-k8.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-1-pentium.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-1.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-2.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-3.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-4-core2.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-4-k8.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-4.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-5-k8.d: Likewise.
* gas/testsuite/gas/i386/ilp32/x86-64-nops-5.d: Likewise.
* gas/testsuite/gas/i386/nops-7.d: New file.
* gas/testsuite/gas/i386/nops-7.s: Likewise.
* gas/testsuite/gas/i386/x86-64-nops-7.d: Likewise.

6 years agoXCOFF disassembler
Alan Modra [Wed, 7 Mar 2018 00:36:15 +0000 (11:06 +1030)]
XCOFF disassembler

xcoff (32-bit) objdump accepted but ignored -M options unless
-mpowerpc was also given.  This patch fixes that, leaving the default
as -Mpwr for xcoff.  I've also enabled more tests for xcoff targets.

binutils/
* configure.ac: Add objdump_private_desc_xcoff for rs6000.
* configure: Regenerate.
gas/
* testsuite/gas/ppc/aix.exp: Run for rs6000 too.
* testsuite/gas/ppc/ppc.exp: Run more tests for non-ELF targets.
* testsuite/gas/ppc/machine.d: Don't run for PE targets.
opcodes/
* disassemble.c (disassembler): Use bfd_arch_powerpc entry for
bfd_arch_rs6000.
* disassemble.h (print_insn_rs6000): Delete.
* ppc-dis.c (powerpc_init_dialect): Handle rs6000.
(disassemble_init_powerpc): Call powerpc_init_dialect for rs6000.
(print_insn_rs6000): Delete.

6 years agomips64 rtype_to_howto error status
Alan Modra [Mon, 5 Mar 2018 04:01:05 +0000 (14:31 +1030)]
mips64 rtype_to_howto error status

* elf64-mips.c (mips_elf64_rtype_to_howto): Return NULL on error.
(mips_elf64_slurp_one_reloc_table): Pass on error.

6 years agoAutomatic date update in version.in
GDB Administrator [Wed, 7 Mar 2018 00:00:35 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoFormatting fixes in rust-exp.y
Tom Tromey [Tue, 6 Mar 2018 20:27:12 +0000 (13:27 -0700)]
Formatting fixes in rust-exp.y

I noticed a few formatting buglets in rust-exp.y: A couple of lines
were too long, and a couple of parser rules did not follow the same
formatting as the rest of the code.

I'm checking this in as obvious.  Tested by rebuilding.

2018-03-06  Tom Tromey  <tom@tromey.com>

* rust-exp.y: Formatting fixes.

6 years agoRISC-V: Disallow output format changes.
Jim Wilson [Tue, 6 Mar 2018 20:01:04 +0000 (12:01 -0800)]
RISC-V: Disallow output format changes.

PR 22920
* emultempl/riscvelf.em (riscv_create_output_section_statements): New.
(LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): New.
* testsuite/ld-elf/pr21884.d (#notarget): Add riscv*-*-*.
* testsuite/ld-unique/pr21529.d (#notarget): Likewise.
* testsuite/ld-srec/srec.exp (run_srec_test): For riscv*-*-* target,
call setup_xfail.

6 years agogdb/riscv: Remove partial target description support
Andrew Burgess [Tue, 6 Mar 2018 16:57:41 +0000 (16:57 +0000)]
gdb/riscv: Remove partial target description support

Some parts of the target description support were committed with the
initial riscv patch.  As target descriptions are not currently supported
on riscv this commit removes the two pieces for code that relate to
target description support.

It is expected that target description support will be added in the
future, at which point this, or similar code will be added back.

gdb/ChangeLog:

* riscv-tdep.c (riscv_register_name): Remove target description
support.
(riscv_gdbarch_init): Remove target description check.

6 years agogdb/riscv: Remove 'Contributed by....' comments
Andrew Burgess [Tue, 6 Mar 2018 16:31:40 +0000 (16:31 +0000)]
gdb/riscv: Remove 'Contributed by....' comments

The GDB coding standard states these lines should never have been
added.

gdb/ChangeLog:

* riscv-tdep.c: Remove 'Contributed by ...' lines from header
comment.
* riscv-tdep.h: Likewise.

6 years agogdb/riscv: Remove use of pseudo registers
Andrew Burgess [Tue, 6 Mar 2018 16:19:52 +0000 (16:19 +0000)]
gdb/riscv: Remove use of pseudo registers

The code making use of pseudo registers was initially intended to
support running 32-bit ABI files on 64-bit riscv targets.  However, the
implementation was incomplete, and broken.

For now I've removed all reference to pseudo registers from the riscv
target, we've not lost any functionality, and this cleans up failures in
the selftests.

Once the riscv target has matured a little we'll probably end up
bringing back some of the use of pseudo registers in order to better
support running 32-bit executables on a 64-bit target.

gdb/ChangeLog:

* riscv-tdep.c (riscv_pseudo_register_read): Delete.
(riscv_pseudo_register_write): Delete.
(riscv_gdbarch_init): Remove all use of pseudo registers.

6 years agobtrace: Remove ui_out cleanups
Simon Marchi [Tue, 6 Mar 2018 14:51:33 +0000 (09:51 -0500)]
btrace: Remove ui_out cleanups

This patch replaces the cleanups that close the list and tuple of the
btrace instruction history output with ui_out_emit_tuple and
ui_out_emit_list.

This allows removing make_cleanup_ui_out_tuple_begin_end and
make_cleanup_ui_out_list_begin_end.

This patch (along with the previous ones in the series) was regtested on
the buildbot.

gdb/ChangeLog:

* record-btrace.c (btrace_print_lines): Replace cleanup
parameter with RAII equivalents.
(btrace_insn_history): Replace cleanup with RAII equivalents.
* ui-out.h (make_cleanup_ui_out_list_begin_end,
make_cleanup_ui_out_tuple_begin_end): Remove.
* ui-out.c (struct ui_out_end_cleanup_data, do_cleanup_end,
make_cleanup_ui_out_end, make_cleanup_ui_out_tuple_begin_end,
make_cleanup_ui_out_list_begin_end): Remove.

6 years agobtrace: Remove VEC cleanups
Simon Marchi [Tue, 6 Mar 2018 14:51:33 +0000 (09:51 -0500)]
btrace: Remove VEC cleanups

This patch replaces two VEC(tp_t) with std::vector<thread_info *>, which
allows to remove two cleanups.  To make it easier to map the old code to
the new code, I added the ordered_remove and unordered_remove functions,
which operate on std::vector and do the same as VEC's
ordered_remove/unordered_remove.

gdb/ChangeLog:

* record-btrace.c (record_btrace_maybe_mark_async_event): Change
parameter types to std::vector.  Use bool.
(record_btrace_wait): Replace VEC(tp_t) with
std::vector<thread_info *>.
* common/gdb_vecs.h (unordered_remove, ordered_remove): New.

6 years agobtrace: Remove btrace disable cleanup
Simon Marchi [Tue, 6 Mar 2018 14:51:32 +0000 (09:51 -0500)]
btrace: Remove btrace disable cleanup

This patch removes a cleanup that disables btrace on threads in case of
failure, so we don't leave it enabled for some the threads and disabled
for the rest.

gdb/ChangeLog:

* record-btrace.c (record_btrace_disable_callback): Remove.
(struct scoped_btrace_disable): New.
(record_btrace_open): Use scoped_btrace_disable.

6 years agogdb/riscv: Fix type when reading register from regcache
Andrew Burgess [Tue, 6 Mar 2018 13:20:14 +0000 (13:20 +0000)]
gdb/riscv: Fix type when reading register from regcache

Should use a ULONGEST when reading from the regcache.

gdb/ChangeLog:

* riscv-tdep.c (riscv_return_value): Change type to ULONGEST for
reading values from registers.

6 years agogdb/riscv: Additional print format string fixes
Andrew Burgess [Tue, 6 Mar 2018 13:05:34 +0000 (13:05 +0000)]
gdb/riscv: Additional print format string fixes

Another riscv format string fix.

gdb/ChangeLog:

* riscv-tdep.c (riscv_push_dummy_call): Use core_addr_to_string_nz
where appropriate.

6 years agogdb/riscv: Fixes to printf format strings
Andrew Burgess [Tue, 6 Mar 2018 12:31:07 +0000 (12:31 +0000)]
gdb/riscv: Fixes to printf format strings

Some of the format strings used in the new riscv target were incorrect,
resulting in build failures on some hosts.  This commit does the
following:

  1. Uses core_addr_to_string for formatting CORE_ADDR types.
  2. Fixes legacy use of stderr for logging in one place that got
     missed, instead gdb_stdlog is used.
  3. Re-indent a few printf related lines that were wrong.

This should resolve some (but not all) of the build failures the new
riscv target introduced.

gdb/ChangeLog:

* riscv-tdep.c (riscv_print_arg_location): Add header comment,
change parameter type.  Use GDB's print functions, and use
core_addr_to_string where appropriate.
(riscv_push_dummy_call): Use core_addr_to_string where
appropriate, update call to riscv_print_arg_location, and reindent
a few lines.
(riscv_return_value): Update call to riscv_print_arg_location.

6 years agogdb: Initial baremetal riscv support
Andrew Burgess [Thu, 9 Nov 2017 20:59:13 +0000 (20:59 +0000)]
gdb: Initial baremetal riscv support

This commit introduces basic support for baremetal RiscV as a GDB
target.  This target is currently only tested against the RiscV software
simulator, which is not included as part of this commit.  The target has
been tested against the following RiscV variants: rv32im, rv32imc,
rv32imf, rv32imfc, rv64im, rv64imc, rv64imfd, rv64imfdc.

Across these variants we pass on average 34858 tests, and fail 272
tests, which is ~0.8%.

The RiscV has a feature of its ABI where structures with a single
floating point field, a single complex float field, or one float and
one integer field are treated differently for argument passing.  The
new test gdb.base/infcall-nested-structs.exp is added to cover this
feature.  As passing these structures should work on all targets then
I've made the test as a generic one, even though, for most targets,
there's probably nothing special about any of these cases.

gdb/ChangeLog:

* Makefile.in (ALL_TARGET_OBS): Add riscv-tdep.o
(HFILES_NO_SRCDIR): Add riscv-tdep.h.
(ALLDEPFILES): Add riscv-tdep.c
* configure.tgt: Add riscv support.
* riscv-tdep.c: New file.
* riscv-tdep.h: New file.
* NEWS: Mention new target.
* MAINTAINERS: Add entry for riscv.

gdb/testsuite/ChangeLog:

* gdb.base/infcall-nested-structs.exp: New file.
* gdb.base/infcall-nested-structs.c: New file.
* gdb.base/float.exp: Add riscv support.

6 years agogdb/amd64: Ignore zero sized fields when calling functions
Andrew Burgess [Fri, 2 Mar 2018 15:48:23 +0000 (15:48 +0000)]
gdb/amd64: Ignore zero sized fields when calling functions

In some cases passing an argument to a function on amd64, or attempting
to fetch the return value, can trigger an assertion failure within GDB.
An example of a type that would trigger such an error is:

  struct foo_t
  {
    long double a;
    struct {
      struct {
        /* Empty.  */
      } es1;
    } s1;
  };

GCC does permit empty structures, so we should probably support this.

The test that exposes this bug is in the next commit along with the
RiscV support.

gdb/ChangeLog:

* amd64-tdep.c (amd64_classify_aggregate): Ignore zero sized
fields within aggregates.

6 years agoAutomatic date update in version.in
GDB Administrator [Tue, 6 Mar 2018 00:00:25 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoUse binary search on dynamic relocations
H.J. Lu [Mon, 5 Mar 2018 11:44:46 +0000 (03:44 -0800)]
Use binary search on dynamic relocations

Replace linear search with binary search on dynamic relocations.  After
finding a match, scan backward to the first matching relocation, then
scan forward for a matching relocation with non-absolute symbol.

On Fedora 27 x86-64, time for "objdump -d" on libxul.so from RHEL 7.4
x86-64 went from

134.46user 0.12system 2:15.03elapsed

to

8.49user 0.14system 0:08.64elapsed

PR binutils/22911
* objdump.c (is_significant_symbol_name): Return TRUE for all
.plt* sections.
(find_symbol_for_address): Replace linear search with binary
search on dynamic relocations.

6 years agoPropagate gdb_disassembly_flags to btrace_print_lines
Simon Marchi [Mon, 5 Mar 2018 01:02:35 +0000 (20:02 -0500)]
Propagate gdb_disassembly_flags to btrace_print_lines

This function can take the flags as the gdb_disassembly_flags type
instead of int.

gdb/ChangeLog:

* record-btrace.c (btrace_print_lines): Change type of flags to
gdb_disassembly_flags.

6 years agoAutomatic date update in version.in
GDB Administrator [Mon, 5 Mar 2018 00:00:35 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoUse signal information to determine SIGTRAP type for FreeBSD.
John Baldwin [Sun, 4 Mar 2018 05:25:33 +0000 (21:25 -0800)]
Use signal information to determine SIGTRAP type for FreeBSD.

Use the signal code from siginfo_t to distinguish SIGTRAP events due
to trace traps (TRAP_TRACE) and software breakpoints (TRAP_BRKPT).
For software breakpoints, adjust the PC when the event is reported as
part of the API when supplying "stopped_by_sw_breakpoint".  Currently
FreeBSD only supports hardware watchpoints and breakpoints on x86
which are reported as trace traps.  Signal information is not used on
MIPS and sparc64 kernels which do not reliably report TRAP_BRKPT for
software breakpoints.

gdb/ChangeLog:

* fbsd-nat.c: Include "inf-ptrace.h".
(USE_SIGTRAP_SIGINFO): Conditionally define.
[USE_SIGTRAP_SIGINFO] (fbsd_handle_debug_trap): New function.
(fbsd_wait) [USE_SIGTRAP_SIGINFO]: Call "fbsd_handle_debug_trap".
[USE_SIGTRAP_SIGINFO] (fbsd_stopped_by_sw_breakpoint): New
function.
[USE_SIGTRAP_SIGINFO] (fbsd_supports_stopped_by_sw_breakpoint):
Likewise.
[USE_SIGTRAP_SIGINFO] (fbsd_supports_stopped_by_hw_breakpoint):
Likewise.
(fbsd_nat_add_target) [USE_SIGTRAP_SIGINFO]: Set
"stopped_by_sw_breakpoint", "supports_stopped_by_sw_breakpoint",
"supports_stopped_by_hw_breakpoint" target methods.

6 years agoAdd a new debug knob for the FreeBSD native target.
John Baldwin [Sun, 4 Mar 2018 05:25:33 +0000 (21:25 -0800)]
Add a new debug knob for the FreeBSD native target.

For now this just logs information about the state of the current LWP
for each STOPPED event in fbsd_wait().

gdb/ChangeLog:

* NEWS (Changes since GDB 8.1): Add "set/show debug fbsd-nat".
* fbsd-nat.c (debug_fbsd_nat): New variable.
(show_fbsd_nat_debug): New function.
(fbsd_wait): Log LWP info if "debug_fbsd_nat" is enabled.
(_initialize_fbsd_nat): Add "fbsd-nat" debug boolean command.

gdb/doc/ChangeLog:

* gdb.texinfo (Debugging Output): Document "set/show debug
fbsd-nat".

6 years agoImplement "to_stopped_by_hw_breakpoint" for x86 debug registers.
John Baldwin [Sun, 4 Mar 2018 05:25:33 +0000 (21:25 -0800)]
Implement "to_stopped_by_hw_breakpoint" for x86 debug registers.

Report that a thread is stopped by a hardware breakpoint if a non-data
watchpoint is set in DR6.  This change should be a no-op since a target
still needs to implement the "to_supports_stopped_by_hw_breakpoint"
method before this function is used.

gdb/ChangeLog:

* nat/x86-dregs.c (x86_dr_stopped_by_hw_breakpoint): New function.
* nat/x86-dregs.h (x86_dr_stopped_by_hw_breakpoint): New
prototype.
* x86-nat.c (x86_stopped_by_hw_breakpoint): New function.
(x86_use_watchpoints): Set "stopped_by_hw_breakpoint" target
method.

6 years agoAutomatic date update in version.in
GDB Administrator [Sun, 4 Mar 2018 00:00:48 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoPR ld/21900: MIPS: Fix relocation processing with undefined symbols
James Cowgill [Sat, 3 Mar 2018 15:49:21 +0000 (15:49 +0000)]
PR ld/21900: MIPS: Fix relocation processing with undefined symbols

Currently, when `mips_elf_calculate_relocation' is asked to relocate an
undefined symbol, it reports an error or a warning and immediately
returns without performing the relocation.  This is fine if the link
fails, but if unresolved_syms_in_objects == RM_GENERATE_WARNING, the
link will continue and output some unrelocated code, which is a
regression from commit e7e2196da3f0 ("MIPS/BFD: Correctly report
undefined relocations").

Fix this by continuing after calling the `undefined_symbol' hook unless
this is an error condition.

bfd/
PR ld/21900
* elfxx-mips.c (mips_elf_calculate_relocation): Only return
after calling `undefined_symbol' hook if this is an error
condition.  Assume the value of 0 for the symbol requested
otherwise.

ld/
PR ld/21900
* testsuite/ld-mips-elf/undefined-warn.d: New test.
* testsuite/ld-mips-elf/undefined.s: Add padding at the end.
* testsuite/ld-mips-elf/mips-elf.exp: Run the new test.

6 years agohandle_general_set: Remove useless xstrdup
Simon Marchi [Sat, 3 Mar 2018 04:27:46 +0000 (23:27 -0500)]
handle_general_set: Remove useless xstrdup

Unless I'm missing something very obvious, this xstrdup seems
unnecessary to me.  We can pass "mode" directly to sprintf.

gdb/gdbserver/ChangeLog:

* server.c (handle_general_set): Remove unnecessary xstrdup.

6 years agoRemove free_char_ptr_vec
Simon Marchi [Sat, 3 Mar 2018 04:22:10 +0000 (23:22 -0500)]
Remove free_char_ptr_vec

Nothing is using it anymore.

gdb/ChangeLog:

* common/gdb_vecs.c (free_char_ptr_vec): Remove.
* common/gdb_vecs.h (free_char_ptr_vec): Remove.

6 years agoC++ify charsets
Simon Marchi [Sat, 3 Mar 2018 04:22:09 +0000 (23:22 -0500)]
C++ify charsets

This patch makes the charset list an std::vector instead of a VEC.
Because we must have access to the raw pointers as a simple array, we
can't use a vector of unique_ptr/unique_xmalloc_ptr.  Therefore, wrap
the vector in a simple class to facilitate the cleanup.  This allows
removing one usage of free_char_ptr_vec.

gdb/ChangeLog:

* charset.c (struct charset_vector): New.
(charsets): Change type to charset_vector.
(find_charset_names): Adjust.
(add_one): Adjust.
(_initialize_charset): Adjust.

6 years agoMake program_space::deleted_solibs a vector of std::string
Simon Marchi [Sat, 3 Mar 2018 04:22:08 +0000 (23:22 -0500)]
Make program_space::deleted_solibs a vector of std::string

This allows removing a usage of free_char_ptr_vec.

gdb/ChangeLog:

* progspace.h (struct program_space) <deleted_solibs>: Change
type to std::vector<std::string>.
* progspace.c (clear_program_space_solib_cache): Adjust.
* breakpoint.c (print_solib_event): Adjust.
(check_status_catch_solib): Adjust.
* solib.c (update_solib_list): Adjust.
* ui-out.h (class ui_out) <field_string>: New overload.
* ui-out.c (ui_out::field_string): New overload.

6 years agoC++ify program_space
Simon Marchi [Sat, 3 Mar 2018 04:22:08 +0000 (23:22 -0500)]
C++ify program_space

This patch makes program_space a C++ object by adding a
constructor/destructor, giving default values to fields, and using
new/delete.

gdb/ChangeLog:

* progspace.h (struct program_space): Add constructor and
destructor, initialize fields.
(add_program_space): Remove.
* progspace.c (add_program_space): Rename to...
(program_space::program_space): ... this.
(release_program_space): Rename to...
(program_space::~program_space): ... this.
(delete_program_space): Use delete to delete program_space.
(initialize_progspace): Use new to allocate program_space.
* inferior.c (add_inferior_with_spaces): Likewise.
(clone_inferior_command): Likewise.
* infrun.c (follow_fork_inferior): Likewise.
(handle_vfork_child_exec_or_exit): Likewise.

6 years agoMake delim_string_to_char_ptr_vec return an std::vector
Simon Marchi [Sat, 3 Mar 2018 04:22:06 +0000 (23:22 -0500)]
Make delim_string_to_char_ptr_vec return an std::vector

This patch makes delim_string_to_char_ptr_vec and all related functions
use std::vector of gdb::unique_xmalloc_ptr.  This allows getting rid of
make_cleanup_free_char_ptr_vec.  Returning a vector of
unique_xmalloc_ptr instead of std::string allows to minimize the impacts
on the calling code.  We can evaluate later whether we could/should
return a vector of std::strings instead.

gdb/ChangeLog:

* common/gdb_vecs.h (make_cleanup_free_char_ptr_vec): Remove.
(delim_string_to_char_ptr_vec): Return std::vector of
gdb::unique_xmalloc_ptr.
(dirnames_to_char_ptr_vec_append): Take std::vector of
gdb::unique_xmalloc_ptr.
(dirnames_to_char_ptr_vec): Return std::vector of
gdb::unique_xmalloc_ptr.
* common/gdb_vecs.c (delim_string_to_char_ptr_vec_append):
Take std::vector of gdb::unique_xmalloc_ptr, adjust the code.
(delim_string_to_char_ptr_vec): Return an std::vector of
gdb::unique_xmalloc_ptr, adjust the code.
(dirnames_to_char_ptr_vec_append): Take an std::vector of
gdb::unique_xmalloc_ptr, adjust the code.
(dirnames_to_char_ptr_vec): Return an std::vector of
gdb::unique_xmalloc_ptr, adjust the code.
* auto-load.c (auto_load_safe_path_vec): Change type to
std::vector of gdb::unique_xmalloc_ptr.
(auto_load_expand_dir_vars): Return an std::vector of
gdb::unique_xmalloc_ptr, adjust the code.
(auto_load_safe_path_vec_update): Adjust.
(filename_is_in_auto_load_safe_path_vec): Adjust.
(auto_load_objfile_script_1): Adjust.
* build-id.c (build_id_to_debug_bfd): Adjust.
* linux-thread-db.c (thread_db_load_search): Adjust.
* source.c (add_path): Adjust.
(openp): Adjust.
* symfile.c (find_separate_debug_file): Adjust.
* utils.c (do_free_char_ptr_vec): Remove.
(make_cleanup_free_char_ptr_vec): Remove.

gdb/gdbserver/ChangeLog:

* server.c (parse_debug_format_options): Adjust to
delim_string_to_char_ptr_vec changes.
* thread-db.c (thread_db_load_search): Adjust to
dirnames_to_char_ptr_vec changes.

6 years agoopcodes error messages
Alan Modra [Thu, 1 Mar 2018 21:53:50 +0000 (08:23 +1030)]
opcodes error messages

Another patch aimed at making binutils comply with the GNU coding
standard.  The generated files require
https://sourceware.org/ml/cgen/2018-q1/msg00004.html

cpu/
* frv.opc: Include opintl.h.
(add_next_to_vliw): Use opcodes_error_handler to print error.
Standardize error message.
(fr500_check_insn_major_constraints, frv_vliw_add_insn): Likewise.
opcodes/
* sysdep.h (opcodes_error_handler): Define.
(_bfd_error_handler): Declare.
* Makefile.am: Remove stray #.
* opc2c.c (main): Remove bogus -l arg handling.  Print "DO NOT
EDIT" comment.
* aarch64-dis.c, * arc-dis.c, * arm-dis.c, * avr-dis.c,
* d30v-dis.c, * h8300-dis.c, * mmix-dis.c, * ppc-dis.c,
* riscv-dis.c, * s390-dis.c, * sparc-dis.c, * v850-dis.c: Use
opcodes_error_handler to print errors.  Standardize error messages.
* msp430-decode.opc, * nios2-dis.c, * rl78-decode.opc: Likewise,
and include opintl.h.
* nds32-asm.c: Likewise, and include sysdep.h and opintl.h.
* i386-gen.c: Standardize error messages.
* msp430-decode.c, * rl78-decode.c, rx-decode.c: Regenerate.
* Makefile.in: Regenerate.
* epiphany-asm.c, * epiphany-desc.c, * epiphany-dis.c,
* epiphany-ibld.c, * fr30-asm.c, * fr30-desc.c, * fr30-dis.c,
* fr30-ibld.c, * frv-asm.c, * frv-desc.c, * frv-dis.c, * frv-ibld.c,
* frv-opc.c, * ip2k-asm.c, * ip2k-desc.c, * ip2k-dis.c, * ip2k-ibld.c,
* iq2000-asm.c, * iq2000-desc.c, * iq2000-dis.c, * iq2000-ibld.c,
* lm32-asm.c, * lm32-desc.c, * lm32-dis.c, * lm32-ibld.c,
* m32c-asm.c, * m32c-desc.c, * m32c-dis.c, * m32c-ibld.c,
* m32r-asm.c, * m32r-desc.c, * m32r-dis.c, * m32r-ibld.c,
* mep-asm.c, * mep-desc.c, * mep-dis.c, * mep-ibld.c, * mt-asm.c,
* mt-desc.c, * mt-dis.c, * mt-ibld.c, * or1k-asm.c, * or1k-desc.c,
* or1k-dis.c, * or1k-ibld.c, * xc16x-asm.c, * xc16x-desc.c,
* xc16x-dis.c, * xc16x-ibld.c, * xstormy16-asm.c, * xstormy16-desc.c,
* xstormy16-dis.c, * xstormy16-ibld.c: Regenerate.

6 years agoAutomatic date update in version.in
GDB Administrator [Sat, 3 Mar 2018 00:00:25 +0000 (00:00 +0000)]
Automatic date update in version.in

6 years agoConditionally include "<windows.h>" on common/pathstuff.c (and unbreak build on mingw*)
Sergio Durigan Junior [Thu, 1 Mar 2018 20:11:44 +0000 (15:11 -0500)]
Conditionally include "<windows.h>" on common/pathstuff.c (and unbreak build on mingw*)

commit b4987c956dfa44ca9fd8552f63e15f5fa094b2a4
Author: Sergio Durigan Junior <sergiodj@redhat.com>
Date:   Fri Feb 9 18:44:59 2018 -0500

    Create new common/pathstuff.[ch]

Introduced a regression when compiling for mingw*:

  /gdb/common/pathstuff.c: In function 'gdb::unique_xmalloc_ptr<char>
  gdb_realpath(const char*)':
  /gdb/common/pathstuff.c:56:14: error: 'MAX_PATH' was not declared in this scope
       char buf[MAX_PATH];
^
  /gdb/common/pathstuff.c:57:5: error: 'DWORD' was not declared in this scope
       DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL);
       ^
  /gdb/common/pathstuff.c:57:11: error: expected ';' before 'len'
       DWORD len = GetFullPathName (filename, MAX_PATH, buf, NULL);
     ^
  /gdb/common/pathstuff.c:63:9: error: 'len' was not declared in this scope
       if (len > 0 && len < MAX_PATH)
   ^
  /gdb/common/pathstuff.c:64:54: error: 'buf' was not declared in this scope
 return gdb::unique_xmalloc_ptr<char> (xstrdup (buf));
^
  make[2]: *** [pathstuff.o] Error 1

The proper fix is to conditionally include "<windows.h>".  This commit
does that, without introducing any regressions as per tests made by
our BuildBot.

gdb/ChangeLog:
2018-03-01  Sergio Durigan Junior  <sergiodj@redhat.com>

PR gdb/22907
* common/pathstuff.c: Conditionally include "<windows.h>".

6 years ago[GDB/testsuite] Use %progbits in watch-loc.c
Thomas Preud'homme [Fri, 2 Mar 2018 11:51:34 +0000 (11:51 +0000)]
[GDB/testsuite] Use %progbits in watch-loc.c

While using @progbits in .pushsection work on some targets, it does not
work on arm target where this introduces a comment. This patch replaces
its use in gdb.dlang/watch-loc.c and gdb.mi/dw2-ref-missing-frame-func.c
by %progbits which should work on all targets since it is used in
target-independent elf/section7.s GAS test.

2018-03-02  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gdb/testsuite/
* gdb.dlang/watch-loc.c: Use %progbits instead of @progbits.
* gdb.mi/dw2-ref-missing-frame-func.c: Likewise.

6 years agoEnsure 8-byte alignment for AArch64 stubs.
Jim Wilson [Fri, 2 Mar 2018 10:47:25 +0000 (10:47 +0000)]
Ensure 8-byte alignment for AArch64 stubs.

PR 22903
bfd * elfnn-aarch64.c (_bfd_aarch64_resize_stubs): Add 8 bytes for branch
and nop instead of 4.
(elfNN_arch64_build_stubs): Add nop after branch.  Increase size by
8 instead of 4.

ld * emultempl/aarch64elf.em (elf${ELFSIZE}_aarch64_add_stub_section):
Give stub_sec 8 byte alignment.
* emulparams/aarch64cloudabi.sh (NOP): Set to 0x1f2003d5.
* emulparams/aarch64elf.sh (NOP): Likewise.
* emulparams/aarch64elf32.sh (NOP): Likewise.
* emulparams/aarch64fbsd.sh (NOP): Likewise.
* emulparams/aarch64linux.sh (NOP): Likewise.
* emulparams/aarch64linux32.sh (NOP): Likewise.
* testsuite/ld-aarch64/erratum835769.d: Adjust for added nop.
* testsuite/ld-aarch64/erratum843419.d: Likewise.
* testsuite/ld-aarch64/farcall-b-defsym.d: Likewise.
* testsuite/ld-aarch64/farcall-b-none-function.d: Likewise.
* testsuite/ld-aarch64/farcall-b-plt.d: Likewise.
* testsuite/ld-aarch64/farcall-b-section.d: Likewise.
* testsuite/ld-aarch64/farcall-b.d: Likewise.
* testsuite/ld-aarch64/farcall-back.d: Likewise.
* testsuite/ld-aarch64/farcall-bl-defsym.d: Likewise.
* testsuite/ld-aarch64/farcall-bl-none-function.d: Likewise.
* testsuite/ld-aarch64/farcall-bl-plt.d: Likewise.
* testsuite/ld-aarch64/farcall-bl-section.d: Likewise.
* testsuite/ld-aarch64/farcall-bl.d: Likewise.