This changes the DWARF reader to cache the result of
find_file_and_directory. This is not especially important now, but it
will help the new DWARF indexer.
This moves file_and_directory to a new file, and then C++-izes it --
replacing direct assignments with methods, and arranging for it to own
any string that must be computed. Finally, the CU's objfile will only
be used on demand; this is an important property for the new DWARF
indexer's parallel mode.
Running frv's allinsn in serial is quite slow due to the sheer number
of tests it contains. By splitting it up and running in parallel, the
execution time on my system goes from ~100sec to ~60sec.
I don't think it's very useful to show deprecated aliases to the
user. It encourages the user to use them, when the goal is the
opposite.
For example, before:
(gdb) help set index-cache enabled
set index-cache enabled, set index-cache off, set index-cache on
alias set index-cache off = set index-cache enabled off
alias set index-cache on = set index-cache enabled on
Enable the index cache.
When on, enable the use of the index cache.
(gdb) help set index-cache on
Warning: 'set index-cache on', an alias for the command 'set index-cache enabled', is deprecated.
Use 'set index-cache enabled on'.
set index-cache enabled, set index-cache off, set index-cache on
alias set index-cache off = set index-cache enabled off
alias set index-cache on = set index-cache enabled on
Enable the index cache.
When on, enable the use of the index cache.
After:
(gdb) help set index-cache enabled
Enable the index cache.
When on, enable the use of the index cache.
(gdb) help set index-cache on
Warning: 'set index-cache on', an alias for the command 'set index-cache enabled', is deprecated.
Use 'set index-cache enabled on'.
Enable the index cache.
When on, enable the use of the index cache.
Change-Id: I989b618a5ad96ba975367e9d16db95523cd57a4c
Commit 92228a334b ("gdb: small "maintenance info line-table"
readability improvements") change the output format of "maint info
line-table" slightly, adding some empty lines between each
line-table. This causes two tests to start failing, update them to
account for those empty lines.
Change-Id: I9d33a58fce3e860ba0554b25f5582e8066a5c519
Commit 4bce7cdaf4 ("gdbsupport: add array_view copy function") caused
an internal error when running gdb.ada/packed_array_assign.exp:
print pra(1) := pr^M
/home/smarchi/src/binutils-gdb/gdb/../gdbsupport/array-view.h:217: internal-error: copy: Assertion `dest.size () == src.size ()' failed.^M
I am not sure what's the root cause of this, whether it is a GDB bug
exposed by using the array_view copy function or not. Back out the
change that triggers the internal error for now, while we investigate
it.
Change-Id: I055ab14143e4cfd3ca7ce8f4855c6c3c05db52a7
The rules for rebuilding the bfd headers live in the doc/ subdir
(most likely) because they rely on the chew & related tools. But
we can collapse them into the main Makefile while keeping the tools
in the doc subdir easily enough. This makes the code simpler and
allows for rebuilding them in parallel.
Also add automake silent rule support while we're here.
- separate each entry with a newline, to visually separate them
- style filenames with the filename style
- print the name of the compunit_symtab
A header now looks like this, with the compunit_symtab name added (and
the coloring, but you can't really see it here):
objfile: /home/simark/build/babeltrace/src/cli/.libs/babeltrace2 ((struct objfile *) 0x613000005980)
compunit_symtab: babeltrace2-cfg-cli-args.c ((struct compunit_symtab *) 0x62100da1ed10)
symtab: /usr/include/glib-2.0/glib/gdatetime.h ((struct symtab *) 0x62100d9ee530)
linetable: ((struct linetable *) 0x0):
Change-Id: Idc23e10aaa66e2e692adb0a6a74144f72c4fa1c7
Now that we use intrusive list to link aliases, it becomes easier to
pass cmd_list_element arguments by const-reference rather than by
pointer to some functions, change a few.
Change-Id: Id0df648ed26e9447da0671fc2c858981cda31df8
Change the manually-implemented linked list to use intrusive_list. This
is not strictly necessary, but it makes the code much simpler.
Change-Id: Idd08090ebf2db8bdcf68e85ef72a9635f1584ccc
Change a few relatively obvious spots using value contents to propagate
the use array_view a bit more.
Change-Id: I5338a60986f06d5969fec803d04f8423c9288a15
I think it would make sense for extract_integer, extract_signed_integer
and extract_unsigned_integer to take an array_view. This way, when we
extract an integer, we can validate that we don't overflow the buffer
passed by the caller (e.g. ask to extract a 4-byte integer but pass a
2-byte buffer).
- Change extract_integer to take an array_view
- Add overloads of extract_signed_integer and extract_unsigned_integer
that take array_views. Keep the existing versions so we don't
need to change all callers, but make them call the array_view
versions.
This shortens some places like:
result = extract_unsigned_integer (value_contents (result_val).data (),
TYPE_LENGTH (value_type (result_val)),
byte_order);
into
result = extract_unsigned_integer (value_contents (result_val), byte_order);
value_contents returns an array view that is of length
`TYPE_LENGTH (value_type (result_val))` already, so the length is
implicitly communicated through the array view.
Change-Id: Ic1c1f98c88d5c17a8486393af316f982604d6c95
An assertion was recently added to array_view::operator[] to ensure we
don't do out of bounds accesses. However, when the array_view is copied
to or from using memcpy, it bypasses that safety.
To address this, add a `copy` free function that copies data from an
array view to another, ensuring that the destination and source array
views have the same size. When copying to or from parts of an
array_view, we are expected to use gdb::array_view::slice, which does
its own bounds check. With all that, any copy operation that goes out
of bounds should be caught by an assertion at runtime.
copy is implemented using std::copy and std::copy_backward, which, at
least on libstdc++, appears to pick memmove when copying trivial data.
So in the end there shouldn't be much difference vs using a bare memcpy,
as we do right now. When copying non-trivial data, std::copy and
std::copy_backward assigns each element in a loop.
To properly support overlapping ranges, we must use std::copy or
std::copy_backward, depending on whether the destination is before the
source or vice-versa. std::copy and std::copy_backward don't support
copying exactly overlapping ranges (where the source range is equal to
the destination range). But in this case, no copy is needed anyway, so
we do nothing.
The order of parameters of the new copy function is based on std::copy
and std::copy_backward, where the source comes before the destination.
Change a few randomly selected spots to use the new function, to show
how it can be used.
Add a test for the new function, testing both with arrays of a trivial
type (int) and of a non-trivial type (foo). Test non-overlapping
ranges as well as three kinds of overlapping ranges: source before dest,
dest before source, and dest == source.
Change-Id: Ibeaca04e0028410fd44ce82f72e60058d6230a03
store_waitstatus is basically a translation function between a status
integer and an equivalent target_waitstatus object. It would make sense
for it to take the integer as a parameter and return the
target_waitstatus by value. Do that, and rename to
host_status_to_waitstatus. Users can then do:
ws = host_status_to_waitstatus (status)
which does the right thing, given the move constructor of
target_waitstatus.
Change-Id: I7a07d59d3dc19d3ed66929642f82f44f3e85d61b
While playing with some code creating target_waitstatus objects, I was
mildly annoyed by the fact that we can't just return a new
target_waitstatus object. We have to do:
target_waitstatus ws;
ws.set_exited (123);
return ws;
Make the setters return the "this" object as a reference, such that it's
possible to do:
return target_waitstatus ().set_exited (123);
I initially thought of adding static creation functions, which you would
use like:
return target_waitstatus::make_exited (123);
However, making the setters return a reference to the object achieves
pretty much the same thing, with less new code.
Change-Id: I45159b7f9fcd9db5b20603480e323020b14ed147
AARCH64_OPDE_EXPECTED_A_AFTER_B and AARCH64_OPDE_A_SHOULD_FOLLOW_B
are not paired with an error string, but we had an assert that the
error was nonnull. Previously this assert was testing uninitialised
memory and so could pass or fail arbitrarily.
opcodes/
* aarch64-opc.c (verify_mops_pme_sequence): Initialize the error
field to null for AARCH64_OPDE_EXPECTED_A_AFTER_B and
AARCH64_OPDE_A_SHOULD_FOLLOW_B.
* aarch64-dis.c (print_verifier_notes): Move assert.
The function value_subscripted_rvalue is only used in valarith.c, so
lets make it a static function.
There should be no user visible change after this commit.
A test in gdb.python/py-send-packet.exp added in this commit:
commit 24b2de7b77
Date: Tue Aug 31 14:04:36 2021 +0100
gdb/python: add gdb.RemoteTargetConnection.send_packet
included a large amount of binary data in the command sent to GDB. As
this test didn't have a real test name the binary data was included in
the gdb.sum file. The contents of the binary data could change
between different runs of GDB, and this makes comparing results
harder.
This commit gives the test a real test name.
This commit:
commit 288712bbac
Date: Mon Nov 22 15:16:27 2021 +0000
gdb/remote: use scoped_restore to control starting_up flag
introduced a use after free bug. The scoped restore added in the
above commit resets a flag within a remote_target's remote_state
object.
However, in some situations, the remote_target can be unpushed before
the error is thrown. If the only reference to the target is the one
in the target stack, then unpushing the target will cause the
remote_target to be deleted, which, in turn, will delete the
remote_state object. The scoped restore will then try to reset the
flag within a deleted object.
This problem was caught in the gdb.server/server-connect.exp test,
which, when run with the address sanitizer enabled, highlights the
write after free bug described above.
This commit resolves this issue by adding a new class specifically for
the purpose of managing the starting_up flag. As well as setting, and
then clearing the starting_up flag, this new class increments, and
then decrements the reference count on the remote_target object. This
prevents the remote_target from being deleted until after the flag has
been reset.
The gdb.server/server-connect.exp now runs cleanly with the address
sanitizer enabled.
It looks like automake makes assumptions about its ability to build info
pages based on the GNU standard behavior of shipping info pages with the
distributions. So even though the info pages were conditionalized, and
automake disabled some of the targets, it was still creeping in by way
of unconditional INFO_DEPS settings.
We can workaround this by adding a stub target for the info page when
building info pages are disabled. This tricks automake into disabling
its own extended generation target. I'll follow up with the automake
folks to see what they think.
That xstrdup is not correct, since we are assigning an std::string. The
result of xstrdup is used to initialize the string, and then lost
forever. Remove it.
Change-Id: Ief7771055e4bfd643ef3b285ec9fb7b1bfd14335
PR27257 reports a problem that can be reproduced as follows:
- use x86_64 machine with avx512 support
- compile a hello world with -m32 to a.out
- start a gdbserver session with a.out
- use gdb to connect to the gdbserver session
This makes us run into:
...
Listening on port 2346
Remote debugging from host ::1, port 34940
src/gdbserver/regcache.cc:257: \
A problem internal to GDBserver has been detected.
Unknown register zmm16h requested
...
The problem is that i387_xsave_to_cache in gdbserver/i387-fp.cc can't find a
register zmm16h in the register cache.
To understand how this happens, first some background.
SSE has 16 128-bit wide xmm registers.
AVX extends the SSE registers set as follows:
- it extends the 16 existing 128-bit wide xmm registers to 256-bit wide ymm
registers.
AVX512 extends the AVX register set as follows:
- it extends the 16 existing 256-bit wide ymm registers to 512-bit wide zmm
registers.
- it adds 16 additional 512-bit wide zmm registers (with corresponding ymm and
xmm subregisters added as well)
However, in 32-bit mode, there are only 8 xmm/ymm/zmm registers.
The problem we're running into is that gdbserver/i387-fp.cc uses these
constants to describe the size of the register file:
...
static const int num_avx512_zmmh_low_registers = 16;
static const int num_avx512_zmmh_high_registers = 16;
static const int num_avx512_ymmh_registers = 16;
static const int num_avx512_xmm_registers = 16;
...
which are all incorrect for the 32-bit case.
Fix this by replacing the constants with variables that have the appropriate
values in 64-bit and 32-bit mode.
Tested on x86_64-linux with native and unix/-m32.
Commit ab557072b8 ("gdb: use actual DWARF version in compunit's
debugformat field") changes the debug format string in "info source" to
show the actual DWARF version, rather than always show "DWARF 2".
However, it failed to consider that some tests checked for the "DWARF 2"
string to see if the test program is compiled with DWARF debug
information. Since everything is compiled with DWARF 4 or 5 nowadays,
that changed the behavior of those tests. Notably, it prevent the
tests using skip_inline_var_tests to run.
Grep through the testsuite for "DWARF 2" and change all occurrences I
could find to use "DWARF [0-9]" instead (that string is passed to TCL's
string match).
Change-Id: Ic7fb0217fb9623880c6f155da6becba0f567a885
In the gdb.ada/fixed_points_function.exp testcase, we have the following
Ada code...
type FP1_Type is delta 0.1 range -1.0 .. +1.0; -- Ordinary
function Call_FP1 (F : FP1_Type) return FP1_Type is
begin
FP1_Arg := F;
return FP1_Arg;
end Call_FP1;
... used as follow:
F1 : FP1_Type := 1.0;
F1 := Call_FP1 (F1);
The testcase, among other things, verifies that "return" works
properly as follow:
| (gdb) return 1.0
| Make pck.call_fp1 return now? (y or n) y
| [...]
| 9 F1 := Call_FP1 (F1);
| (gdb) next
| (gdb) print f1
| $1 = 0.0625
The output of the last command shows that we returned the wrong
value. The value printed gives a clue about the problem, since
it is 1/16th of the value we expected, where 1/16 is FP1_Type's
scaling factor.
The problem, here, comes from the fact that the function
handling return values for base types (ppc64_sysv_abi_return_value_base)
writes the return value using unpack_long which, upon seeing that
the value being unpacked is a fixed point type, applies the scaling
factor, to get the integer-representation of our fixed-point value
(similar to what it does with floats, for instance).
So, the fix consists in teaching ppc64_sysv_abi_return_value_base
about fixed-point types, and to avoid the unwanted application
of the scaling factor.
Note that the "finish" function, on the other hand, does not
suffer from this issue, simply becaue the value returned by
the function is read from register without the use of a type,
thus avoiding an unwanted application of a scaling factor.
No test added, as this change is already tested by
gdb.ada/fixed_points_function.exp.
Co-Authored-By: Tristan Gingold <gingold@adacore.com>
This commit adds support for TYPE_CODE_FIXED_POINT types for
"finish" and "return" commands.
Consider the following Ada code...
type FP1_Type is delta 0.1 range -1.0 .. +1.0; -- Ordinary
function Call_FP1 (F : FP1_Type) return FP1_Type is
begin
FP1_Arg := F;
return FP1_Arg;
end Call_FP1;
... used as follow:
F1 : FP1_Type := 1.0;
F1 := Call_FP1 (F1);
"finish" currently behaves as follow:
| (gdb) finish
| [...]
| Value returned is $1 = 0
We expect the returned value to be "1".
Similarly, "return" makes the function return the wrong value:
| (gdb) return 1.0
| Make pck.call_fp1 return now? (y or n) y
| [...]
| 9 F1 := Call_FP1 (F1);
| (gdb) next
| (gdb) print f1
| $1 = 0.0625
(we expect it to print "1" instead).
This problem comes from the handling of integral return values
when the return value is actually fixed point type. Our type
here is actually a range of a fixed point type, but the same
principles should also apply to pure fixed-point types. For
the record, here is what the debugging info looks like:
<1><238>: Abbrev Number: 2 (DW_TAG_subrange_type)
<239> DW_AT_lower_bound : -16
<23a> DW_AT_upper_bound : 16
<23b> DW_AT_name : pck__fp1_type
<23f> DW_AT_type : <0x248>
<1><248>: Abbrev Number: 4 (DW_TAG_base_type)
<249> DW_AT_byte_size : 1
<24a> DW_AT_encoding : 13 (signed_fixed)
<24b> DW_AT_binary_scale: -4
<24c> DW_AT_name : pck__Tfp1_typeB
<250> DW_AT_artificial : 1
... where the scaling factor is 1/16.
Looking at the "finish" command, what happens is that riscv_arg_location
determines that our return value should be returned by parameter using
an integral convention (via builtin type long). And then,
riscv_return_value uses a cast to that builtin type long to
store the value of into a buffer with the right register size.
This doesn't work in our case, because the underlying value
returned by the function is unscaled, which means it is 16,
and thus the cast is like doing:
arg_val = (FP1_Type) 16
... In other words, it is trying to create an FP1_Type enty whose
value is 16. Applying the scaling factor, that's 256, and because
the size of FP1_Type is 1 byte, we overflow and thus it ends up
being zero.
The same happen with the "return" function, but the other way around.
The fix consists in handling fixed-point types separately from
integral types.
Consider the following Ada code:
type FP1_Type is delta 0.1 range -1.0 .. +1.0; -- Ordinary
FP1_Arg : FP1_Type := 0.0;
function Call_FP1 (F : FP1_Type) return FP1_Type is
begin
FP1_Arg := F;
return FP1_Arg;
end Call_FP1;
After having stopped inside function Call_FP1 as follow:
Breakpoint 1, pck.call_fp1 (f=1) at /[...]/pck.adb:5
5 FP1_Arg := F;
Returning from that function call using "finish" should show
that the function return "1.0" (the same value as was passed
as an argument). However, this is not the case:
(gdb) finish
Run till exit from #0 pck.call_fp1 (f=1)
[...]
9 F1 := Call_FP1 (F1);
Value returned is $1 = 0
This patch enhances the extraction of the return value to know about
fixed point types.
Consider the following code:
type FP1_Type is delta 0.1 range -1.0 .. +1.0; -- Ordinary
function Call_FP1 (F : FP1_Type) return FP1_Type is
begin
return F;
end Call_FP1;
When the default in GCC is to generate proper DWARF info for fixed point
types, then in gdb, printing the result of a call to call_fp1 with a
decimal parameter leads to:
(gdb) p call_fp1(0.5)
$1 = 0
The displayed value is wrong, and we actually expected:
(gdb) p call_fp1(0.5)
$1 = 0.5
What happened is that our fixed point type parameter got promoted to a
32bit integer because we detected that the length of that object was less
than 4 bytes. The compiler does not perform this promotion and therefore
GDB should not either.
This patch fixes the behavior described above.
This adds a 'task apply' command, which is the Ada tasking analogue of
'thread apply'. Unlike 'thread apply', it doesn't offer the
'ascending' flag; but otherwise it's essentially the same.
The MOPS instructions should be used as a triple, such as:
cpyfp [x0]!, [x1]!, x2!
cpyfm [x0]!, [x1]!, x2!
cpyfe [x0]!, [x1]!, x2!
The registers should also be the same for each writeback operand.
This patch adds a warning for code that doesn't follow this rule,
along similar lines to the warning that we already emit for
invalid uses of MOVPRFX.
include/
* opcode/aarch64.h (C_SCAN_MOPS_P, C_SCAN_MOPS_M, C_SCAN_MOPS_E)
(C_SCAN_MOPS_PME): New macros.
(AARCH64_OPDE_A_SHOULD_FOLLOW_B): New aarch64_operand_error_kind.
(AARCH64_OPDE_EXPECTED_A_AFTER_B): Likewise.
(aarch64_operand_error): Make each data value a union between
an int and a string.
opcodes/
* aarch64-tbl.h (MOPS_CPY_OP1_OP2_INSN): Add scan flags.
(MOPS_SET_OP1_OP2_INSN): Likewise.
* aarch64-opc.c (set_out_of_range_error): Update after change to
aarch64_operand_error.
(set_unaligned_error, set_reg_list_error): Likewise.
(init_insn_sequence): Use a 3-instruction sequence for
MOPS P instructions.
(verify_mops_pme_sequence): New function.
(verify_constraints): Call it.
* aarch64-dis.c (print_verifier_notes): Handle
AARCH64_OPDE_A_SHOULD_FOLLOW_B and AARCH64_OPDE_EXPECTED_A_AFTER_B.
gas/
* config/tc-aarch64.c (operand_mismatch_kind_names): Add entries
for AARCH64_OPDE_A_SHOULD_FOLLOW_B and AARCH64_OPDE_EXPECTED_A_AFTER_B.
(operand_error_higher_severity_p): Check that
AARCH64_OPDE_A_SHOULD_FOLLOW_B and AARCH64_OPDE_EXPECTED_A_AFTER_B
come between AARCH64_OPDE_RECOVERABLE and AARCH64_OPDE_SYNTAX_ERROR;
their relative order is not significant.
(record_operand_error_with_data): Update after change to
aarch64_operand_error.
(output_operand_error_record): Likewise. Handle
AARCH64_OPDE_A_SHOULD_FOLLOW_B and AARCH64_OPDE_EXPECTED_A_AFTER_B.
* testsuite/gas/aarch64/mops_invalid_2.s,
testsuite/gas/aarch64/mops_invalid_2.d,
testsuite/gas/aarch64/mops_invalid_2.l: New test.
This patch adds support for FEAT_MOPS, an Armv8.8-A extension
that provides memcpy and memset acceleration instructions.
I took the perhaps controversial decision to generate the individual
instruction forms using macros rather than list them out individually.
This becomes useful with a follow-on patch to check that code follows
the correct P/M/E sequence.
[https://developer.arm.com/documentation/ddi0596/2021-09/Base-Instructions?lang=en]
include/
* opcode/aarch64.h (AARCH64_FEATURE_MOPS): New macro.
(AARCH64_ARCH_V8_8): Make armv8.8-a imply AARCH64_FEATURE_MOPS.
(AARCH64_OPND_MOPS_ADDR_Rd): New aarch64_opnd.
(AARCH64_OPND_MOPS_ADDR_Rs): Likewise.
(AARCH64_OPND_MOPS_WB_Rn): Likewise.
opcodes/
* aarch64-asm.h (ins_x0_to_x30): New inserter.
* aarch64-asm.c (aarch64_ins_x0_to_x30): New function.
* aarch64-dis.h (ext_x0_to_x30): New extractor.
* aarch64-dis.c (aarch64_ext_x0_to_x30): New function.
* aarch64-tbl.h (aarch64_feature_mops): New feature set.
(aarch64_feature_mops_memtag): Likewise.
(MOPS, MOPS_MEMTAG, MOPS_INSN, MOPS_MEMTAG_INSN)
(MOPS_CPY_OP1_OP2_PME_INSN, MOPS_CPY_OP1_OP2_INSN, MOPS_CPY_OP1_INSN)
(MOPS_CPY_INSN, MOPS_SET_OP1_OP2_PME_INSN, MOPS_SET_OP1_OP2_INSN)
(MOPS_SET_INSN): New macros.
(aarch64_opcode_table): Add MOPS instructions.
(aarch64_opcode_table): Add entries for AARCH64_OPND_MOPS_ADDR_Rd,
AARCH64_OPND_MOPS_ADDR_Rs and AARCH64_OPND_MOPS_WB_Rn.
* aarch64-opc.c (aarch64_print_operand): Handle
AARCH64_OPND_MOPS_ADDR_Rd, AARCH64_OPND_MOPS_ADDR_Rs and
AARCH64_OPND_MOPS_WB_Rn.
(verify_three_different_regs): New function.
* aarch64-asm-2.c: Regenerate.
* aarch64-dis-2.c: Likewise.
* aarch64-opc-2.c: Likewise.
gas/
* doc/c-aarch64.texi: Document +mops.
* config/tc-aarch64.c (parse_x0_to_x30): New function.
(parse_operands): Handle AARCH64_OPND_MOPS_ADDR_Rd,
AARCH64_OPND_MOPS_ADDR_Rs and AARCH64_OPND_MOPS_WB_Rn.
(aarch64_features): Add "mops".
* testsuite/gas/aarch64/mops.s, testsuite/gas/aarch64/mops.d: New test.
* testsuite/gas/aarch64/mops_invalid.s,
* testsuite/gas/aarch64/mops_invalid.d,
* testsuite/gas/aarch64/mops_invalid.l: Likewise.
Armv8.8-A defines a read-only system register called id_aa64isar2_el1.
The register was previously RES0 and should therefore be accepted
at all architecture levels.
[https://developer.arm.com/documentation/ddi0595/2021-09/AArch64-Registers/ID-AA64ISAR2-EL1--AArch64-Instruction-Set-Attribute-Register-2?lang=en]
opcodes/
* aarch64-opc.c (aarch64_sys_regs): Add id_aa64isar2_el1.
gas/
* testsuite/gas/aarch64/sysreg-diagnostic.s: Test writes to
id_aa64isar2_el1.
* testsuite/gas/aarch64/sysreg-diagnostic.d: Update accordingly.
* testsuite/gas/aarch64/sysreg-diagnostic.l: Likewise.
* testsuite/gas/aarch64/sysreg.s: Test reads from
id_aa64isar2_el1.
* testsuite/gas/aarch64/sysreg.d: Update accordingly.
This patch adds skeleton support for -march=armv8.8-a, testing only
that it correctly inherits from armv8.7-a.
include/
* opcode/aarch64.h (AARCH64_FEATURE_V8_8): New macro.
(AARCH64_ARCH_V8_8): Likewise.
gas/
* doc/c-aarch64.texi: Document armv8.8-a.
* config/tc-aarch64.c (aarch64_archs): Add armv8-8-a
* testsuite/gas/aarch64/v8-8-a.s,
* testsuite/gas/aarch64/v8-8-a.d: New test.
We warn about MOVPRFX instructions that have no following
instruction. This patch adds a line number to the message,
which is useful if the assembly code has multiple text sections.
The new code is unconditional since OBJ_ELF is always defined
for aarch64.
gas/
* config/tc-aarch64.h (aarch64_segment_info_type): Add last_file
and last_line.
* config/tc-aarch64.c (now_instr_sequence): Delete.
(force_automatic_sequence_close): Provide a line number when
reporting unclosed sequences.
(md_assemble): Record the location of the instruction in
tc_segment_info.
* testsuite/gas/aarch64/sve-movprfx_4.l: Add line number to error
message.
* testsuite/gas/aarch64/sve-movprfx_7.l: Likewise.
* testsuite/gas/aarch64/sve-movprfx_8.l: Likewise.
libopcodes has some code to check constraints across sequences
of consecutive instructions. It was added to support MOVPRFX
sequences but is going to be useful for the Armv8.8-A MOPS
feature as well.
Currently the structure has one field to record the instruction
that started a sequence and another to record the remaining
instructions in the sequence. It's more convenient for the
MOPS code if we put the instructions into a single array instead.
No functional change intended.
include/
* opcode/aarch64.h (aarch64_instr_sequence): Replace num_insns
and current_insns with num_added_insns and num_allocated_insns.
opcodes/
* aarch64-opc.c (add_insn_to_sequence): New function.
(init_insn_sequence): Update for new aarch64_instr_sequence layout.
Add the first instruction to the inst array.
(verify_constraints): Update for new aarch64_instr_sequence layout.
Don't add the last instruction to the array.
The immediate form of MSR has a 4-bit immediate field (in CRm).
However, many forms of MSR require a smaller immediate. These cases
are identified by value in operand_general_constraint_met_p,
but they're now the common case rather than the exception.
This patch therefore adds the maximum value to the sys_reg
description and gets the range from there. It also enforces
the minimum of 0, which avoids a situation in which:
msr dit, #2
would give the expected:
Error: immediate value out of range 0 to 1
whereas:
msr dit, #-1
would give:
Error: immediate value out of range 0 to 15
(from the later UIMM4 checking).
Also:
- we were reporting the first error above against the wrong operand
- TCO takes a single-bit immediate, but we previously allowed
all 16 values.
[https://developer.arm.com/documentation/ddi0596/2021-09/Base-Instructions/MSR--immediate---Move-immediate-value-to-Special-Register-?lang=en]
opcodes/
* aarch64-opc.h (F_REG_MAX_VALUE, F_GET_REG_MAX_VALUE): New macros.
* aarch64-opc.c (operand_general_constraint_met_p): Read the
maximum MSR immediate value from aarch64_pstatefields.
(aarch64_pstatefields): Add the maximum immediate value
for each register.
gas/
* testsuite/gas/aarch64/sysreg-4.s: Use an immediate value of 1
rather than 8 for the TCO test.
* testsuite/gas/aarch64/sysreg-4.d: Update accordingly.
* testsuite/gas/aarch64/armv8_2-a-illegal.l: Fix operand number
in MSR immediate error messages.
* testsuite/gas/aarch64/diagnostic.l: Likewise.
* testsuite/gas/aarch64/pan-illegal.l: Likewise.
* testsuite/gas/aarch64/ssbs-illegal1.l: Likewise.
* testsuite/gas/aarch64/illegal-sysreg-4b.s,
* testsuite/gas/aarch64/illegal-sysreg-4b.d,
* testsuite/gas/aarch64/illegal-sysreg-4b.l: New test.
