In proc mi_expect_stop there's a proc argument reason that's handled like so:
...
set r "reason=\"$reason\","
...
That's fine for say:
...
set reason "foo"
...
for which this evaluates to:
...
set r "reason=\"foo\","
...
But there are more complex uses, for instance:
...
set reason "breakpoint-hit\",disp=\"keep\",bkptno=\"$decimal"
...
which evaluates to:
...
set r "\"breakpoint-hit\",disp=\"keep\",bkptno=\"$decimal\""
...
Note how in this reason argument, the first two '\"' seems to form a pair
surrounding ',disp=', which is not the case, which is confusing.
Fix this by only adding the quotes in mi_expect_stop if the string doesn't
already contain quotes, such that we have the more readable:
...
set reason "\"breakpoint-hit\",disp=\"keep\",bkptno=\"$decimal\""
...
Tested on x86_64-linux.
In commit 722c4596034 ("[gdb/testsuite] Fix gdb.cp/*.exp for remote host"), I
needed to change ".*/" into "(.*/)?" in:
...
gdb_test "info variable everywhere" \
"File .*/m-static\[.\]h.*const int gnu_obj_4::everywhere;"
...
However, due to the fact that I got this output:
...
(gdb) info variable everywhere^M
All variables matching regular expression "everywhere":^M
^M
File /data/vries/gdb/src/gdb/testsuite/gdb.cp/m-static.h:^M
8: const int gnu_obj_4::everywhere;^M
^M
File /data/vries/gdb/src/gdb/testsuite/gdb.cp/m-static1.cc:^M
8: const int gnu_obj_4::everywhere;^M
...
I decided to make the matching somewhat stricter, to make sure that the two
matched lines were subsequent.
The commit turned out to be more strict than intended, and caused a regression
on Ubuntu 20.04, where the output was instead:
...
(gdb) info variable everywhere^M
All variables matching regular expression "everywhere":^M
^M
File /data/vries/gdb/src/gdb/testsuite/gdb.cp/m-static.h:^M
8: const int gnu_obj_4::everywhere;^M
...
At that point I realized I'm looking at a bug (filed as PR symtab/30265),
which manifests on openSUSE Leap 15.4 for native and readnow, and on Ubuntu
20.04 for readnow, but not for native.
Before my commit, the test-case passed whether the bug manifested or not.
After my commit, the test-case only passed when the bug manifested.
Fix the test-case regression by reverting to the situation before the commit:
pass whether the bug manifests or not. We could add an xfail for the PR, but
I'm expecting a fix soon, so that doesn't look worth the effort.
Tested on x86_64-linux, both on openSUSE Leap 15.4 and Ubuntu 20.04, both with
native and readnow.
Reported-By: Simon Marchi <simon.marchi@efficios.com>
This input sequence is accepted by DAP:
...
{"seq": 4, "type": "request", "command": "configurationDone"}Content-Length: 84
...
This input sequence has the same effect:
...
{"seq": 4, "type": "request", "command": "configurationDone"}ignorethis
Content-Length: 84
...
but the 'ignorethis' part is silently ignored.
Log the ignored bit, such that we have:
...
READ: <<<{"seq": 4, "type": "request", "command": "configurationDone"}>>>
WROTE: <<<{"request_seq": 4, "type": "response", "command": "configurationDone"
, "success": true}>>>
+++ run
IGNORED: <<<b'ignorethis'>>>
...
Simon reported that doing:
...
$ while make check-parallel TESTS='gdb.opencl/*.exp' -j 100; do true; done
...
could run into:
...
ERROR: remote_download to target of \
/data/vries/gdb/src/gdb/testsuite/lib/opencl_kernel.cl to opencl_kernel.cl: \
cp: cannot create regular file 'opencl_kernel.cl': File exists
...
Fix this by using gdb_remote_download (instead of plain remote_download) in
allow_opencl_test, which takes care of:
- downloading to a location which is safe for parallel testing, by
using standard_output_file, and
- cleaning up the downloaded file, meaning we can remove the corresponding
"remote_file target delete ${clprogram}" lines in allow_opencl_test.
Tested on x86_64-linux.
Reported-by: Simon Marchi <simon.marchi@efficios.com>
Insert two stubs in a BTI enabled binary when fixing long calls: The
first is near the call site and uses an indirect jump like before,
but it targets the second stub that is near the call target site and
uses a direct jump.
This is needed when a single stub breaks BTI compatibility.
The stub layout is kept fixed between sizing and building the stubs,
so the location of the second stub is known at build time, this may
introduce padding between stubs when those are relaxed. Stub layout
with BTI disabled is unchanged.
This commit is initial support for SystemTap for RISC-V Linux. The
following two tests exercise SystemTap functionality, and are showing
many failures, which are all fixed by this commit:
gdb.cp/exceptprint.exp
gdb.base/stap-probe.exp
One thing I wasn't sure about is if the SystemTap support should be
Linux specific, or architecture specific. For aarch64, arm, ia64, and
ppc, the SystemTap support seems to libe in the ARCH-linux-tdep.c
file, while for amd64, i386, and s390 the implementation lives in
ARCH-tdep.c. I have no idea which of these is the better choice -- or
maybe both choices are correct in the right circumstances, and I'm
just not aware of how to choose between them.
Anyway, for this patch I selected riscv-tdep.c (though clearly, moving
the changes to riscv-linux-tdep.c is trivial if anyone thinks that's a
more appropriate location).
The stap-probe.exp file tests immediate, register, and register
indirect operands, all of which appear to be working fine with this
commit. The generic expression support doesn't appear to be
architecture specific, so I'd expect that to work fine too.
The comment on the gdbarch_displaced_step_fixup gdbarch method
indicates that this method is optional and that GDB will perform some
default if this method is not supplied. As such we define a predicate
gdbarch_displaced_step_fixup_p.
It may have been true at one point that the fixup method was optional,
but it is no longer true. If this method is not defined and GDB tries
to complete a displaced step, then GDB is going to crash.
Additionally the gdbarch_displaced_step_fixup_p predicate is not used
anywhere in GDB.
In this commit I have removed the gdbarch_displaced_step_fixup_p
predicate, and I have updated the validation check for the
gdbarch_displaced_step_fixup method; if the
gdbarch_displaced_step_copy_insn method is defined then the fixup
method must also be defined.
I believe I've manually checked all the current places where
gdbarch_displaced_step_copy_insn is defined and they all also define
the fixup method, so this change should cause no problems for anyone.
There should be no user visible changes after this commit.
Approved-By: Pedro Alves <pedro@palves.net>
I found an upcast from template_symbol to symbol. This was necessary
long ago, but since symbols use inheritance now, it is not. This
patch removes it. Tested by rebuilding.
Commit 904d9b02a185 ("gdb: make "maintenance info line-table" show
relocated addresses again") changed the format of that command, but
failed to adjust some test cases that relied on it. This patch fixes
it.
The failures fixed are:
FAIL: gdb.base/maint.exp: maint info line-table w/o a file name
FAIL: gdb.dwarf2/dw2-out-of-range-end-of-seq.exp: END with address 1 eliminated
FAIL: gdb.dwarf2/dw2-ranges-base.exp: count END markers in line table
Change-Id: I946580d5e100f1beeac99a9e90d7819c6bb4ac6c
When running test-cases gdb.cp/annota{2,3}.exp with target board
native-extended-gdbserver, we run into a few FAILs, due to the test-cases
trying to match inferior output together with gdb output.
Fix this by ignoring the inferior output in this case.
Tested on x86_64-linux.
Commit 1acc9dca423f ("Change linetables to be objfile-independent")
changed "maintenance info line-table" to print unrelocated addresses
instead of relocated. This breaks a few tests on systems where that
matters. The ones I see are:
Running /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.base/consecutive.exp ...
FAIL: gdb.base/consecutive.exp: stopped at bp, 2nd instr (missing hex prefix)
Running /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.base/async.exp ...
FAIL: gdb.base/async.exp: stepi&
FAIL: gdb.base/async.exp: nexti&
FAIL: gdb.base/async.exp: finish&
These tests run "maintenance info line-table" to record the address of
some lines, and then use these addresses in expected patterns. It
therefore expects these addresses to match the runtime addresses,
therefore the relocated addresses.
Add back the relocated addresses, next to the unrelocated addresses,
like so:
INDEX LINE REL-ADDRESS UNREL-ADDRESS IS-STMT PROLOGUE-END
0 6 0x0000555555555119 0x0000000000001119 Y
1 7 0x000055555555511d 0x000000000000111d Y
2 8 0x0000555555555123 0x0000000000001123 Y
3 END 0x0000555555555125 0x0000000000001125 Y
The unrelocated addresses can always be useful trying to map this
information with a DWARF info dump.
Adjust the is_stmt_addresses proc in the testsuite to match the new
output.
Change-Id: I59558f167e13e63421c9e0f2cad192e7c95c10cf
We can't free "internal" on errors, since bfd_coff_swap_sym_in may
call bfd_alloc. For example, _bfd_XXi_swap_sym_in may even create new
sections, which use bfd_alloc'd memory. If "internal" is freed, all
more recently bfd_alloc'd memory is also freed.
* coffgen.c (coff_get_normalized_symtab): Don't bfd_release on
error.
* coff-mcore.c (coff_mcore_relocate_section): Sanity check sym
string offset when setting up name for use by error messages.
* coff-sh.c (sh_relocate_section): Likewise.
As far as I can see the only place that sets obj_coff_strings without
setting obj_coff_strings_len is pe_ILF_build_a_bfd. Fix that and we
can simplify the sym string offset check. This is just a tidy.
pe_ILF_build_a_bfd doesn't create bad symbols and
_bfd_coff_read_string_table will always result in non-zero
obj_coff_strings_len when obj_coff_strings is non-NULL.
PR 17910
* coffgen.c (_bfd_coff_internal_syment_name): Always sanity
check sym string offset.
* peicode.h (pe_ILF_build_a_bfd): Set obj_coff_strings_len.
It's an odd thing to have objdump -x show a different section table
to objdump -h, but that can happen if swapping in symbols leads to
creating sections. Setting SEC_LINKER_CREATED stops the display of
these sections, so that you get shown what is in the object file.
* peXXigen.c (_bfd_XXi_swap_sym_in): Set SEC_LINKER_CREATED on
fake section created for C_SECTION syms. Don't zero asection
fields that are already zero.
Free memory on closing bfds. The COFF close_and_cleanup does more
work than _bfd_generic_close_and_cleanup (defined as
_bfd_archive_close_and_cleanup).
* coff-rs6000.c (_bfd_xcoff_close_and_cleanup): Define as
_bfd_coff_close_and_cleanup.
* coff64-rs6000.c (rs6000_xcoff64_vec, rs6000_xcoff64_aix_vec): Use
_bfd_coff_close_and_cleanup.
The recent commit:
commit 2a8339b71f37f2d02f5b2194929c9d702ef27223
Author: Carl Love <cel@us.ibm.com>
Date: Thu Mar 9 16:10:18 2023 -0500
PowerPC: fix for gdb.reverse/finish-precsave.exp and gdb.reverse/finish-reverse.exp
PPC64 multiple entry points, a normal entry point and an alternate entry
point. The alternate entry point is to setup the Table of Contents (TOC)
register before continuing at the normal entry point. When the TOC is
already valid, the normal entry point is used, this is typically the case.
The alternate entry point is typically referred to as the global entry
point (GEP) in IBM. The normal entry point is typically referred to as
the local entry point (LEP).
.....
Is causing regression failures on on PowerPC platforms. The regression
failures are in tests:
gdb.reverse/finish-precsave.exp
gdb.btrace/tailcall.exp
gdb.mi/mi-reverse.exp
gdb.btrace/step.exp
gdb.reverse/until-precsave.exp
gdb.reverse/finish-reverse.exp
gdb.btrace/tailcall-only.exp
The issue is in gdb/infcmd.c, function finish_command. The value of the
two new variables ALT_ENTRY_POINT and ENTRY_POINT are being initializezed
to SAL.PC. However, SAL has just been declared. The value of SAL.PC is
zero at this point. The intialization of ALT_ENTRY_POINT and ENTRY_POINT
needs to be after the initialization of SAL.
This patch moves the initialization of ALT_ENTRY_POINT and ENTRY_POINT
variables to fix the regression failures.
The patch has been tested on Power10 and on X86.
In a recent commit I forgot to add a double quote before chmod here:
...
remote_exec build $rsh_cmd chmod go-rx ."
...
Fix it by adding the missing double quote.
Looking at the implementation of ${board}_file in remote-stdio-gdbserver.exp,
I don't see a relevant difference with the implementation of standard_file
in dejagnu.
Simplify the board by removing ${board}_file.
Tested on x86_64-linux, by running gdb.testsuite/board-sanity.exp.
In commit ff581559f9d ("[gdb/testsuite] Add gdb.testsuite/board-sanity.exp") I
removed handling of HOST_DIR in local-remote-host-native.exp to fix FAILs
in test-case gdb.testsuite/board-sanity.exp.
Reintroduce handling of HOST_DIR using remotedir, now that using remotedir for
a host board no longer make compilation fail due to commit 80d6c79866f
("[gdb/testsuite] Handle remotedir in remote_upload").
This fixes an XFAIL in gdb.testsuite/board-sanity.exp, introduced in commit
3741934fdb0 ("[gdb/testsuite] Set remotedir by default in some boards").
Tested on x86_64-linux.
Since the tdesc_powerpc_vsx32, tdesc_powerpc_vsx64, tdesc_powerpc_altivec32 and tdesc_powerpc_altivec64
definitions are moved to ppc-tdep.h we no longer need to import these .c files.
I noticed a weird comment in one of the .y files, and then ended up
removing some unnecessary #includes from these files.
Tested by rebuilding.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
The mi_version function is unused, and I think it's better overall if
it is never used. This patch removes it. Tested by rebuilding.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
The type allocation changes introduced a failure in python-helper.exp
that I did not notice. The bug is that, with these patches,
arch-allocated integer types have a TYPE_SPECIFIC_INT object attached.
This patch updates the test to allow this.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30253
Dejagnu's remotedir implementation has support in remote_exec and
remote_download, but not remote_upload.
Consider the following scenario:
- downloading an executable to target,
- running it,
- uploading a file produced by the executable
while assuming remote target user remote-target with homedir
/home/remote-target and remotedir set to /home/remote-target/tmp.
Concretely, it looks like this:
...
# binfile == "$outputs/gdb.abc/a.out"
set target_binfile [remote_download target $binfile]
# target_binfile == "/home/remote-target/tmp/a.out"
remote_exec target $target_binfile
# Running $target_binfile produced /home/remote-target/tmp/result.txt.
set result [remote_upload target /home/remote-target/tmp/result.txt \
$outputs/gdb.abc/result.txt]
# result == $outputs/gdb.abc/result.txt.
...
Add a remote_upload implementation that also handles remotedir in lib/gdb.exp,
overriding dejagnu's remote_upload, such that we can simplify the
remote_upload call to:
...
set result [remote_upload target result.txt $outputs/gdb.abc/result.txt]
...
Tested on x86_64-linux.
PR testsuite/30250
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30250
In some cases GDB will fail when attempting to complete a command that
involves a rust symbol, the failure can manifest as a crash.
The problem is caused by the completion_match_for_lcd object being
left containing invalid data during calls to cp_symbol_name_matches_1.
The first question to address is why we are calling a C++ support
function when handling a rust symbol. That's due to GDB's auto
language detection for msymbols, in some cases GDB can't tell if a
symbol is a rust symbol, or a C++ symbol.
The test application contains symbols for functions which are
statically linked in from various rust support libraries. There's no
DWARF for these symbols, so all GDB has is the msymbols built from the
ELF symbol table.
Here's the problematic symbol that leads to our crash:
mangled: _ZN4core3str21_$LT$impl$u20$str$GT$5parse17h5111d2d6a50d22bdE
demangled: core::str::<impl str>::parse
As an msymbol this is initially created with language auto, then GDB
eventually calls symbol_find_demangled_name, which loops over all
languages calling language_defn::sniff_from_mangled_name, the first
language that can demangle the symbol gets assigned as the language
for that symbol.
Unfortunately, there's overlap in the mangled symbol names,
some (legacy) rust symbols can be demangled as both rust and C++, see
cplus_demangle in libiberty/cplus-dem.c where this is mentioned.
And so, because we check the C++ language before we check for rust,
then the msymbol is (incorrectly) given the C++ language.
Now it's true that is some cases we might be able to figure out that a
demangled symbol is not actually a valid C++ symbol, for example, in
our case, the construct '::<impl str>::' is not, I believe, valid in a
C++ symbol, we could look for ':<' and '>:' and refuse to accept this
as a C++ symbol.
However, I'm not sure it is always possible to tell that a demangled
symbol is rust or C++, so, I think, we have to accept that some times
we will get this language detection wrong.
If we accept that we can't fix the symbol language detection 100% of
the time, then we should make sure that GDB doesn't crash when it gets
the language wrong, that is what this commit addresses.
In our test case the user tries to complete a symbol name like this:
(gdb) complete break pars
This results in GDB trying to find all symbols that match 'pars',
eventually we consider our problematic symbol, and we end up with a
call stack that looks like this:
#0 0x0000000000f3c6bd in strncmp_iw_with_mode
#1 0x0000000000706d8d in cp_symbol_name_matches_1
#2 0x0000000000706fa4 in cp_symbol_name_matches
#3 0x0000000000df3c45 in compare_symbol_name
#4 0x0000000000df3c91 in completion_list_add_name
#5 0x0000000000df3f1d in completion_list_add_msymbol
#6 0x0000000000df4c94 in default_collect_symbol_completion_matches_break_on
#7 0x0000000000658c08 in language_defn::collect_symbol_completion_matches
#8 0x0000000000df54c9 in collect_symbol_completion_matches
#9 0x00000000009d98fb in linespec_complete_function
#10 0x00000000009d99f0 in complete_linespec_component
#11 0x00000000009da200 in linespec_complete
#12 0x00000000006e4132 in complete_address_and_linespec_locations
#13 0x00000000006e4ac3 in location_completer
In cp_symbol_name_matches_1 we enter a loop, this loop repeatedly
tries to match the demangled problematic symbol name against the user
supplied text ('pars'). Each time around the loop another component
of the symbol name is stripped off, thus, we check 'pars' against
these options:
core::str::<impl str>::parse
str::<impl str>::parse
<impl str>::parse
parse
As soon as we get a match the cp_symbol_name_matches_1 exits its loop
and returns. In our case, when we're looking for 'pars', the match
occurs on the last iteration of the loop, when we are comparing to
'parse'.
Now the problem here is that cp_symbol_name_matches_1 uses the
strncmp_iw_with_mode, and inside strncmp_iw_with_mode we allow for
skipping over template parameters. This allows GDB to match the
symbol name 'foo<int>(int,int)' if the user supplies 'foo(int,'.
Inside strncmp_iw_with_mode GDB will record any template arguments
that it has skipped over inside the completion_match_for_lcd object
that is passed in as an argument.
And so, when GDB tries to match against '<impl str>::parse', the first
thing it sees is '<impl str>', GDB assumes this is a template argument
and records this as a skipped region within the
completion_match_for_lcd object. After '<impl str>' GDB sees a ':'
character, which doesn't match with the 'pars' the user supplied, so
strncmp_iw_with_mode returns a value indicating a non-match. GDB then
removes the '<impl str>' component from the symbol name and tries
again, this time comparing to 'parse', which does match.
Having found a match, then in cp_symbol_name_matches_1 we record the
match string, and the full symbol name within the
completion_match_result object, and return.
The problem here is that the skipped region, the '<impl str>' that we
recorded in the penultimate loop iteration was never discarded, its
still there in our returned result.
If we look at what the pointers held in the completion_match_result
that cp_symbol_name_matches_1 returns, this is what we see:
core::str::<impl str>::parse
| \________/ |
| | '--- completion match string
| '---skip range
'--- full symbol name
When GDB calls completion_match_for_lcd::finish, GDB tries to create a
string using the completion match string (parse), but excluding the
skip range, as the stored skip range is before the start of the
completion match string, then GDB tries to do some weird string
creation, which will cause GDB to crash.
The reason we don't often see this problem in C++ is that for C++
symbols there is always some non-template text before the template
argument. This non-template text means GDB is likely to either match
the symbol, or reject the symbol without storing a skip range.
However, notice, I did say, we don't often see this problem. Once I
understood the issue, I was able to reproduce the crash using a pure
C++ example:
template<typename S>
struct foo
{
template<typename T>
foo (int p1, T a)
{
s = 0;
}
S s;
};
int
main ()
{
foo<int> obj (2.3, 0);
return 0;
}
Then in GDB:
(gdb) complete break foo(int
The problem here is that the C++ symbol for the constructor looks like
this:
foo<int>::foo<double>(int, double)
When GDB enters cp_symbol_name_matches_1 the symbols it examines are:
foo<int>::foo<double>(int, double)
foo<double>(int, double)
The first iteration of the loop will match the 'foo', then add the
'<int>' template argument will be added as a skip range. When GDB
find the ':' after the '<int>' the first iteration of the loop fails
to match, GDB removes the 'foo<int>::' component, and starts the
second iteration of the loop.
Again, GDB matches the 'foo', and now adds '<double>' as a skip
region. After that the '(int' successfully matches, and so the second
iteration of the loop succeeds, but, once again we left the '<int>' in
place as a skip region, even though this occurs before the start of
our match string, and this will cause GDB to crash.
This problem was reported to the mailing list, and a solution
discussed in this thread:
https://sourceware.org/pipermail/gdb-patches/2023-January/195166.html
The solution proposed here is similar to one proposed by the original
bug reported, but implemented in a different location within GDB.
Instead of placing the fix in strncmp_iw_with_mode, I place the fix in
cp_symbol_name_matches_1. I believe this is a better location as it
is this function that implements the loop, and it is this loop, which
repeatedly calls strncmp_iw_with_mode, that should be resetting the
result object state (I believe).
What I have done is add an assert to strncmp_iw_with_mode that the
incoming result object is empty.
I've also added some other asserts in related code, in
completion_match_for_lcd::mark_ignored_range, I make some basic
assertions about the incoming range pointers, and in
completion_match_for_lcd::finish I also make some assertions about how
the skip ranges relate to the match pointer.
There's two new tests. The original rust example that was used in the
initial bug report, and a C++ test. The rust example depends on which
symbols are pulled in from the rust libraries, so it is possible that,
at some future date, the problematic symbol will disappear from this
test program. The C++ test should be more reliable, as this only
depends on symbols from within the C++ source code.
Since I originally posted this patch to the mailing list, the
following patch has been merged:
commit 6e7eef72164c00d6a5a7b0bce9fa01f5481f33cb
Date: Sun Mar 19 09:13:10 2023 -0600
Use rust_demangle to fix a crash
This solves the problem of a rust symbol ending up in the C++ specific
code by changing the order languages are sorted. However, this new
commit doesn't address the issue in the C++ code which was fixed with
this commit.
Given that the C++ issue is real, and has a reproducer, I'm still
going to merge this fix. I've left the discussion of rust in this
commit message as I originally wrote it, but it should be read within
the context of GDB prior to commit 6e7eef72164c00d6a5a7.
Co-Authored-By: Zheng Zhan <zzlossdev@163.com>
It tries to resemble what's underlying is_part_of_name(), but doesn't
quite achieve that: '$' for example is unconditionally marked as part of
symbol names, but was included as identifier char for Intel syntax only.
Note that i386_att_operand() checks for the immediate prefix first, so
the wider coverage by starts_memory_operand() is has no real effect
there, but it does matter for something like
mov %fs:$dollar, %eax
which previously wasn't accepted (but which clearly is a memory
reference - there's no point in forcing people to parenthesize the
symbol name). Similarly including '%' as an identfier for Intel syntax
had no real significance to the rest of the assembler. If '%' was to be
valid in (unquoted) symbol names, LEX_PCT would need to be defined.
Note further that this also addresses the latent issue of a sub-target
defining LEX_AT or LEX_QM to zero: That would make '@' and/or '?' no
valid part of symbol names, but would have included them in what
is_identifier_char() considers a valid part of a name. (There's a minor
related issue which is actually being eliminated: te-interix.h allows
'@' only in the middle of symbol names, yet starts_memory_operand()
specifically looks at the first character of [possibly] a symbol name.)
In parse_real_register() there's no point also checking is_name_ender()
as at this point no character is marked solely LEX_END_NAME by any sub-
target. Checking is_name_beginner() is also pointless as the hash lookup
will fail anyway for a zero-length name.
While touching the check in parse_real_register() also drop the
"allow_naked_reg" part of the condition: This has only led to
inconsistent error messages.
While in principle merely rejecting this for .insn would be sufficient
for the purposes there, be more generic and reject it for anything that
isn't going to be a branch: All elements of same-mnemonic template
groups either are branches, or are not, and the few cases possibly
requiring a 2nd parsing pass aren't affected either. This then also
improves diagnostics for misuses like
inc *%eax
incl %fs:*(%eax)
add *$1, %eax
With VexVVVV only being boolean, the SSE shift-by-immediate instructions
don't need special casing anymore for SSE2AVX handling. Simplify the two
respective templates. (No change to generated tables.)
With the SDM long having dropped the NDS/NDD/DDS concept of identifying
encoding variants, we can finally do away with this concept as well. Of
the few consumers of the attribute, only an assertion was still checking
for a particular value, which we don't really need to retain.
When touching lines anyway, modernize other aspects as well. This often
improves similarity to adjacent lines.
