YunQiang Su [Fri, 10 Nov 2023 14:20:50 +0000 (14:20 +0000)]
GAS/MIPS: Add mips16-e-irix.d testcase
Ying Huang [Fri, 10 Nov 2023 14:03:17 +0000 (14:03 +0000)]
MIPS: Change all E_MIPS_* to EF_MIPS_*
Nick Clifton [Fri, 10 Nov 2023 11:37:27 +0000 (11:37 +0000)]
Add ability to change linker warning messages into errors when reporting executable stacks and/or executable segments.
include
* bfdlink.h (struct bfd_link_info): Update descriptions of the 'execstack', 'noexecstack' and 'warn_execstack' fields. Add 'error_exectack' and 'warn_is_error_for_rwx_segments' fields.
bfd
* elf.c (assign_file_positions_except_relocs): Turn warnings about executable segments into errors if so requested.
* elflink.c (bfd_elf_size_dynamic_sections): Turn warnings about executable stacks into errors if so requested.
ld
* ldlex.h (enum option_values): Add OPTION_ERROR_EXECSTACK, OPTION_NO_ERROR_EXECSTACK, OPTION_WARN_EXECSTACK_OBJECTS, OPTION_ERROR_RWX_SEGMENTS and OPTION_NO_ERROR_RWX_SEGMENTS. (struct ld_option): Add new long options. (parse_args): Parse new long options. (elf_static_list_options): Display the new options.
* ld.texi: Document the new command line options.
* configure.ac (error-execstack): New configuration option. (error-rwx-segments): New configuration option.
* emultempl/elf.em (_before_parse): Initialse the new linkinfo fields.
* NEWS: Mention the new features.
* config.in: Regenerate.
* configure: Regenerate.
* testsuite/ld-elf/commonpage2.d: Disable errors for RWX segments and/or executable stacks.
* testsuite/ld-elf/elf.exp: Likewise.
* testsuite/ld-elf/header.d: Likewise.
* testsuite/ld-elf/loadaddr1.d: Likewise.
* testsuite/ld-elf/loadaddr2.d: Likewise.
* testsuite/ld-elf/maxpage4.d: Likewise.
* testsuite/ld-elf/nobits-1.d: Likewise.
* testsuite/ld-elf/note-1.d: Likewise.
* testsuite/ld-elf/orphan-10.d: Likewise.
* testsuite/ld-elf/orphan-11.d: Likewise.
* testsuite/ld-elf/orphan-12.d: Likewise.
* testsuite/ld-elf/orphan-5.d: Likewise.
* testsuite/ld-elf/orphan-7.d: Likewise.
* testsuite/ld-elf/orphan-8.d: Likewise.
* testsuite/ld-elf/orphan-9.d: Likewise.
* testsuite/ld-elf/orphan-region.d: Likewise.
* testsuite/ld-elf/orphan.d: Likewise.
* testsuite/ld-elf/pr19539.d: Likewise.
* testsuite/ld-elf/pr26256-1a.d: Likewise.
* testsuite/ld-elf/pr26907.d: Likewise.
* testsuite/ld-elf/pr28597.d: Likewise.
* testsuite/ld-elf/retain2.d: Likewise.
* testsuite/ld-elf/shared.exp: Likewise.
* testsuite/ld-elf/size-1.d: Likewise.
* testsuite/ld-elf/textaddr7.d: Likewise.
* testsuite/ld-elf/warn1.d: Likewise.
* testsuite/ld-elf/warn2.d: Likewise.
* testsuite/ld-i386/discarded1.d: Likewise.
* testsuite/ld-i386/pr19175.d: Likewise.
* testsuite/ld-i386/pr19539.d: Likewise.
* testsuite/ld-i386/pr23189.d: Likewise.
* testsuite/ld-plugin/lto-3r.d: Likewise.
* testsuite/ld-plugin/lto-5r.d: Likewise.
* testsuite/ld-plugin/lto.exp: Likewise.
* testsuite/ld-powerpc/ppc476-shared.d: Likewise.
* testsuite/ld-powerpc/ppc476-shared2.d: Likewise.
* testsuite/ld-powerpc/pr28827-2.d: Likewise.
* testsuite/ld-s390/s390.exp: Likewise.
* testsuite/ld-scripts/align2a.d: Likewise.
* testsuite/ld-scripts/align2b.d: Likewise.
* testsuite/ld-scripts/align5.d: Likewise.
* testsuite/ld-scripts/alignof.exp: Likewise.
* testsuite/ld-scripts/crossref.exp: Likewise.
* testsuite/ld-scripts/defined2.d: Likewise.
* testsuite/ld-scripts/defined3.d: Likewise.
* testsuite/ld-scripts/defined5.d: Likewise.
* testsuite/ld-scripts/pr14962.d: Likewise.
* testsuite/ld-scripts/pr18963.d: Likewise.
* testsuite/ld-scripts/pr20302.d: Likewise.
* testsuite/ld-scripts/print-memory-usage.exp: Likewise.
* testsuite/ld-scripts/rgn-at1.d: Likewise.
* testsuite/ld-scripts/rgn-at10.d: Likewise.
* testsuite/ld-scripts/rgn-at4.d: Likewise.
* testsuite/ld-scripts/rgn-at6.d: Likewise.
* testsuite/ld-scripts/rgn-at8.d: Likewise.
* testsuite/ld-scripts/rgn-at9.d: Likewise.
* testsuite/ld-scripts/rgn-over1.d: Likewise.
* testsuite/ld-scripts/rgn-over2.d: Likewise.
* testsuite/ld-scripts/rgn-over4.d: Likewise.
* testsuite/ld-scripts/rgn-over5.d: Likewise.
* testsuite/ld-scripts/rgn-over6.d: Likewise.
* testsuite/ld-scripts/script.exp: Likewise.
* testsuite/ld-scripts/sizeof.exp: Likewise.
* testsuite/ld-scripts/sort-file.d: Likewise.
* testsuite/ld-x86-64/discarded1.d: Likewise.
* testsuite/ld-x86-64/pr19175.d: Likewise.
* testsuite/ld-x86-64/pr19539a.d: Likewise.
* testsuite/ld-x86-64/pr19539b.d: Likewise.
* testsuite/ld-x86-64/pr23189.d: Likewise.
Nick Clifton [Fri, 10 Nov 2023 10:21:34 +0000 (10:21 +0000)]
Move new features above the 'Changes in 2.41' comment
Lulu Cai [Mon, 30 Oct 2023 09:07:08 +0000 (17:07 +0800)]
Add support for ilp32 register alias.
GDB Administrator [Fri, 10 Nov 2023 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in
Michael Matz [Tue, 7 Nov 2023 16:12:46 +0000 (17:12 +0100)]
bfd: use less memory in string merging
the offset-to-entry mappings are allocated in blocks, which may
become a bit wasteful in case there are extremely many small
input files or sections. This made it so that a large project
(Qt5WebEngine) didn't build anymore on x86 32bit due to address
space limits. It barely fit into address space before the new
string merging, and then got pushed over the limit by this.
So instead of leaving the waste reallocate the maps to their final
size once known. Now the link barely fits again.
bfd/
* merge.c (record_section): Reallocate offset maps to their
final size.
Michael Matz [Tue, 7 Nov 2023 15:54:44 +0000 (16:54 +0100)]
ld: Avoid overflows in string merging
as the bug report shows we had an overflow in the test if
hash table resizing is needed. Reorder the expression to avoid
that. There's still a bug somewhere in gracefully handling
failure in resizing (e.g. out of memory), but this pushes the
boundary for that occurring somewhen into the future and
immediately helps the reporter.
bfd/
PR ld/31009
* merge.c (NEEDS_RESIZE): New macro avoiding overflow.
(sec_merge_maybe_resize): Use it.
(sec_merge_hash_insert): Ditto.
Szabolcs Nagy [Thu, 9 Nov 2023 13:35:37 +0000 (13:35 +0000)]
ld: aarch64: Use lp64 abi in recent BTI stub tests
The tests are not compatible with ilp32 abi: the GNU property
note is ABI dependent (size changes) and the disasm is ABI
dependent too. Making the test portable between the ABIs is
not trivial.
For now force lp64 abi.
Szabolcs Nagy [Tue, 24 Oct 2023 15:24:22 +0000 (16:24 +0100)]
ld: aarch64: Add BTI stub insertion test PR30930
The test creates a large shared library and covers a number of
BTI stub insertion cases.
Szabolcs Nagy [Wed, 18 Oct 2023 15:12:56 +0000 (16:12 +0100)]
bfd: aarch64: Avoid BTI stub for a PLT that has BTI
We decide to emit BTI stubs based on the instruction at the target
location. But PLT code is generated later than the stubs so we always
read 0 which is not a valid BTI.
Fix the logic to special case the PLT section: this is code the linker
generates so we know when it will have BTI.
This avoids BTI stubs in large executables where the PLTs have them
already. An alternative is to never emit BTI stubs for PLTs, instead
use BTI in the PLT if a library gets too big, however that may be
more tricky given the ordering of PLT sizing and stub insertion.
Related to bug 30957.
Szabolcs Nagy [Tue, 17 Oct 2023 13:13:00 +0000 (14:13 +0100)]
bfd: aarch64: Fix leaks in case of BTI stub reuse
BTI stub parameters were recomputed even if those were already set up.
This is unnecessary work and leaks the symbol name that is allocated
for the stub.
Szabolcs Nagy [Mon, 16 Oct 2023 12:18:13 +0000 (13:18 +0100)]
bfd: aarch64: Fix broken BTI stub PR30930
Input sections are grouped together that can use the same stub area
(within reach) and these groups have a stable id.
Stubs have a name generated from the stub group id and target symbol.
When a relocation requires a stub with a name that already exists, the
stub is reused instead of adding a new one.
For an indirect branch stub another BTI stub may be inserted near the
target to provide a BTI landing pad.
The BTI stub can end up with the same stub group id and thus the same
name as the indirect stub. This happens if the target symbol is within
reach of the indirect branch stub. Then, due to the name collision,
only a single stub was emmitted which branched to itself causing an
infinite loop at runtime.
A possible solution is to just name the BTI stubs differently, but
since in the problematic case the indirect and BTI stub are in the
same stub area, a better solution is to emit a single stub with a
direct branch. The stub is still needed since the caller cannot reach
the target directly and we also want a BTI landing pad in the stub in
case other indirect stubs target the same symbol and thus need a BTI
stub.
In short we convert an indirect branch stub into a BTI stub when the
target is within reach and has no BTI. It is a hassle to change the
symbol of the stub so a BTI stub may end up with *_veneer instead of
*_bti_veneer after the conversion, but this should not matter much.
(Refactoring some of _bfd_aarch64_add_call_stub_entries would be
useful but too much for this bug fix patch.)
The same conversion to direct branch could be done even if the target
did not need a BTI. The stub groups are fixed in the current logic so
linking can fail if too many stubs are inserted and the section layout
is changed too much, but this only happens in extreme cases that can
be reasonably ignored. Because of this the target cannot go out of
reach during stub insertion so the optimization is valid, but not
implemented by this patch for the non-BTI case.
Fixes bug 30930.
Szabolcs Nagy [Fri, 13 Oct 2023 16:51:15 +0000 (17:51 +0100)]
bfd: aarch64: Fix BTI stub optimization PR30957
The instruction was looked up in the wrong input file (file of branch
source instead of branch target) when optimizing away BTI stubs in
commit
5834f36d93cabf1a8bcc7dd7654141aed3d296bc
bfd: aarch64: Optimize BTI stubs PR30076
This can cause adding BTI stubs when they are not necessary or removing
them when they are (the latter is a correctness issue but it is very
unlikely in practice).
Fixes bug 30957.
Victor Do Nascimento [Thu, 9 Nov 2023 11:19:47 +0000 (11:19 +0000)]
aarch64: Fix error in THE system register checking
The erroneous omission of a "reg_value == " in the THE system register
encoding check added in [1] led to an error which was not picked up in
GCC but which was flagged in Clang due to its use of
[-Werror,-Wconstant-logical-operand] check. Together with this fix we
add a new test for the THE registers to pick up their illegal use,
adding an extra and important layer of validation.
Furthermore, in separating system register from instruction
implementation (with which only the former was of concern in the cited
patch), additions made to `aarch64-tbl.h' are rolled back so
that these can be added later when adding THE instructions to the
codebase, a more natural place for these changes.
[1] https://sourceware.org/pipermail/binutils/2023-November/130314.html
opcodes/ChangeLog:
* aarch64-opc.c (aarch64_sys_ins_reg_supported_p): Fix typo.
* aarch64-tbl.h (THE): Remove.
(aarch64_feature_set aarch64_feature_the): Likewise.
gas/ChangeLog:
* testsuite/gas/aarch64/illegal-sysreg-8.l: Add tests for THE
system registers.
* testsuite/gas/aarch64/illegal-sysreg-8.s: Likewise.
Jan Beulich [Thu, 9 Nov 2023 11:55:52 +0000 (12:55 +0100)]
x86: rework UWRMSR operand swapping
As indicated during review already, doing the swapping early is overall
cheaper than doing it only after operand matching.
Jan Beulich [Thu, 9 Nov 2023 11:55:26 +0000 (12:55 +0100)]
x86: do away with is_evex_encoding()
As we have grown more uses of it, it becomes increasingly more desirable
to replace it by a simpler check. Have i386-gen do at build time what so
far was done at runtime: Deal with templates indicating EVEX-encoding by
other than the EVex attribute, and set that to "dynamic" in such cases.
This then allows simplifying a number of other conditionals as well.
Jan Beulich [Thu, 9 Nov 2023 11:54:58 +0000 (12:54 +0100)]
x86: split insn templates' CPU field
Right now the opcode table has entries with ISA restrictions of the form
FEAT1|FEAT2, the meaning of which depends on context and requires
special treatment in tc-i386.c: Sometimes this means "both features
requires", whereas originally it was intended to solely mean "all of
these features required". Split the field, with the original one
regaining its original meaning. The new field now truly means "any of
these". The combination of both fields is still and &&-type check, i.e.
(all of these) && (any of these). In the opcode table more involved
combinations of features then also need expressing this way: "all"
entities first, follow by "any" entities enclosed in parentheses, e.g.
x64&(AVX|AVX512F). If the "all" part is empty, parentheses may not be
added around the "any" part (unless parsing logic was further relaxed).
Note that this way AVX512VL no longer needs as much special treatment,
and hence templates previously using AVX512F|AVX512VL are switched to
just AVX512VL.
Note further that this requires FMA handling as resulting from
da0784f961d8 ("x86: fold FMA VEX and EVEX templates") to be slightly
re-done: FMA now becomes more similar to AVX and AVX2.
Jan Beulich [Thu, 9 Nov 2023 11:54:23 +0000 (12:54 +0100)]
x86: Cpu64 handling improvements
First of all we want to also accumulate its reverse dependencies, such
that we can use them in cpu_flags_match(). This is in particular in
preparation of APX additions, such that e.g. BMI VEX-encoding templates
can become combined VEX/EVEX ones.
Once we have the reverse dependencies, we can further leverage them to
omit explicit "&x64" from any insn templates dealing with 64-bit-mode-
only ISA extensions. Besides helping readability for several insn
templates we already have, this will also help with what is going to be
added for APX (as all of the new templates would otherwise need to have
"&x64").
Note that rather than leaving a meaningless CPU_64_FLAGS (which is
unused anyway), its emitting is now also suppressed.
Jan Beulich [Thu, 9 Nov 2023 11:53:30 +0000 (12:53 +0100)]
x86: Intel Core processors do not support CMPXCHG16B
This being a 64-bit-only instruction (see also i386-opc.tbl) it cannot
possibly be supported by CPUs not supporting 64-bit mode.
GDB Administrator [Thu, 9 Nov 2023 00:00:33 +0000 (00:00 +0000)]
Automatic date update in version.in
Carl Love [Wed, 8 Nov 2023 16:33:15 +0000 (11:33 -0500)]
rs6000, Fix test gdb.base/store.exp
The test currently fails for IEEE 128-bit floating point types. PowerPC
supports the IBM double 128-bit floating point format and IEEE 128-bit
format. The IBM double 128-bit floating point format uses two 64-bit
floating point registers to store the 128-bit value. The IEEE 128-bit
floating point format stores the value in a single 128-bit vector-scalar
register (vsr).
The various floating point values, 32-bit float, 64-bit double, IBM double
128-bit float and IEEE 128-bit floating point numbers are all mapped to the
DWARF fpr numbers. The issue is the IEEE 128-bit floating point values are
actually stored in a vsr not the fprs. This patch changes the register
mapping for the vsrs from the fpr to the vsr registers so the value is
properly accessed by GDB. The functions rs6000_linux_register_to_value,
rs6000_linux_value_to_register, rs6000_linux_value_from_register check if
the value is an IEEE 128-bit floating point value and adjust the register
number as needed. The test in function rs6000_convert_register_p is fixed
so it is only true for floating point values.
This patch fixes three regression tests in gdb.base/store.exp.
The patch has been tested on Power 8 LE/BE, Power 9 LE/BE and Power 10 LE
with no regressions.
Carl Love [Wed, 8 Nov 2023 16:32:58 +0000 (11:32 -0500)]
rs6000, Fix Linux DWARF register mapping
Overview of issues fixed by the patch.
The primary issue this patch fixes is the DWARF register mapping for
Linux. The changes in ppc-linux-tdep.c fix the DWARF register mapping
issues. The register mapping issue is responsible for two of the
five regression bugs seen in gdb.base/store.exp.
Once the register mapping was fixed, an underlying issue with the unwinding
of the signal trampoline in common-code in ifrun.c was found. This
underlying bug is best described by Ulrich in the following description.
The unwinder bug shows up on platforms where the kernel uses a trampoline
to dispatch "calls to" the signal handler (not just *returns from* the
signal handler). Many platforms use a trampoline for signal return, and
that is working fine, but the only platform I'm (Ulrich) aware of that
uses a trampoline for signal handler calls is (recent kernels for)
PowerPC. I believe the rationale for using a trampoline here
is to improve performance by avoiding unbalancing of the
branch predictor's call/return stack.
However, on PowerPC the bug is dormant as well as it is hidden
by *another* bug that prevents correct unwinding out of the
signal trampoline. This is because the custom CFI for the
trampoline uses a register number (VSCR) that is not ever used
by compiler-generated CFI, and that particular register is
mapped to an invalid number by the current PowerPC DWARF mapper.
The underlying unwinder bug is exposed by the "new" regression failures
in gdb.base/sigstep.exp. These failures were previously masked by
the fact that GDB was not seeing a valid frame when it tried to unwind
the frames. The sigstep.exp test is specifically testing stepping into
a signal handler. With the correct DWARF register mapping in place,
specifically the VSCR mapping, the signal trampoline code now unwinds to a
valid frame exposing the pre-existing bug in how the signal handler on
PowerPC works. The one line change infrun.c fixes the exiting bug in
the common-code for platforms that use a trampoline to dispatch calls
to the signal handler by not stopping in the SIGTRAMP_FRAME.
Detailed description of the DWARF register mapping fix.
The PowerPC DWARF register mapping is the same for the .eh_frame and
.debug_frame on Linux. PowerPC uses different mapping for .eh_frame and
.debug_frame on other operating systems. The current GDB support for
mapping the DWARF registers in rs6000_linux_dwarf2_reg_to_regnum and
rs6000_adjust_frame_regnum file gdb/rs6000-tdep.c is not correct for Linux.
The files have some legacy mappings for spe_acc, spefscr, EV which was
removed from GCC in 2017.
This patch adds a two new functions rs6000_linux_dwarf2_reg_to_regnum,
and rs6000_linux_adjust_frame_regnum in file gdb/ppc-linux-tdep.c to handle
the DWARF register mappings on Linux. Function
rs6000_linux_dwarf2_reg_to_regnum is installed for both gdb_dwarf_to_regnum
and gdbarch_stab_reg_to_regnum since the mappings are the same.
The ppc_linux_init_abi function in gdb/ppc-linux-tdep.c is updated to
call set_gdbarch_dwarf2_reg_to_regnum map the new function
rs6000_linux_dwarf2_reg_to_regnum for the architecture. Similarly,
dwarf2_frame_set_adjust_regnum is called to map
rs6000_linux_adjust_frame_regnum into the architecture.
Additional detail on the signal handling fix.
The specific sequence of events for handling a signal on most
architectures is as follows:
1) Some code is running when a signal arrives.
2) The kernel handles the signal and dispatches to the handler.
...
However on PowerPC the sequence of events is:
1) Some code is running when a signal arrives.
2) The kernel handles the signal and dispatches to the trampoline.
3) The trampoline performs a normal function call to the handler.
...
We want the "nexti" to step into, not over, signal handlers invoked by
the kernel. This is the case for most platforms as the kernel puts a
signal trampoline frame onto the stack to handle proper return after the
handler. However, on some platforms such as PowerPC, the kernel actually
uses a trampoline to handle *invocation* of the handler. We do not
want GDB to stop in the SIGTRAMP_FRAME. The issue is fixed in function
process_event_stop_test by adding a check that the frame is not a
SIGTRAMP_FRAME to the if statement to stop in a subroutine call. This
prevents GDB from erroneously detecting the trampoline invocation as a
subroutine call.
This patch fixes two regression test failures in gdb.base/store.exp.
The patch then fixes an exposed, dormant, signal handling issue that
is exposed in the signal handling test gdb.base/sigstep.exp.
The patch has been tested on Power 8 LE/BE, Power 9 LE/BE, Power 10 with
no new regressions. Note, only two of the five failures in store.exp
are fixed. The remaining three failures are fixed in a following
patch.
Andrew Burgess [Tue, 10 Oct 2023 09:00:10 +0000 (10:00 +0100)]
gdb: call update_thread_list after completing an inferior call
I noticed that if GDB is using a remote or extended-remote target,
then, if an inferior call caused a new thread to appear, or for an
existing thread to exit, then these events are not reported to the
user.
The problem is that for these targets GDB relies on a call to
update_thread_list to learn about changes to the inferior's thread
list.
If GDB doesn't pass through the normal stop code then GDB will not
call update_thread_list, and so will not report changes in the thread
list.
This commit adds an additional update_thread_list call, after which
thread events are correctly reported.
Andrew Burgess [Tue, 10 Oct 2023 09:17:35 +0000 (10:17 +0100)]
gdb: call update_thread_list for $_inferior_thread_count function
I noticed that sometimes the value returned by $_inferior_thread_count
can become out of sync with the actual thread count of the inferior,
and will disagree with the number of threads reported by 'info
threads'. This commit fixes this issue.
The cause of the problem is that 'info threads' includes a call to
update_thread_list, this can be seen in print_thread_info_1 in
thread.c, while $_inferior_thread_count doesn't include a similar
call, see the function inferior_thread_count_make_value also in
thread.c.
Of course, this is only a problem when GDB is running on a target that
relies on update_thread_list calls to learn about new threads,
e.g. remote or extended-remote targets. Native targets generally
learn about new threads as soon as they appear and will not have this
problem.
I ran into this issue when writing a test for the next commit which
uses inferior function calls to add an remove threads from an
inferior. But for testing I've made use of non-stop mode and
asynchronous inferior execution; by reading the inferior state I can
know when a new thread has been created, at which point I can print
$_inferior_thread_count while the inferior is still running. This is
important, if I stop the inferior then GDB will pass through an
update_thread_list call in the normal stop code, which will
synchronise the thread list, after which $_inferior_thread_count will
report the correct value.
With this change in place $_inferior_thread_count is now correct.
Andrew Burgess [Fri, 20 Oct 2023 13:23:40 +0000 (14:23 +0100)]
gdb: add a custom command completer for disassemble command
Add a new command completer function for the disassemble command.
There are two things that this completion function changes. First,
after the previous commit, the new function calls skip_over_slash_fmt,
which means that hitting tab after entering a /OPT flag now inserts a
space ready to start typing the address to disassemble at:
(gdb) disassemble /r<TAB>
(gdb) disassemble /r <CURSOR>
But also, we now get symbol completion after a /OPT option set,
previously this would do nothing:
(gdb) disassemble /r mai<TAB>
But now:
(gdb) disassemble /r mai<TAB>
(gdb) disassemble /r main <CURSOR>
Which was my main motivation for working on this commit.
However, I have made a second change in the completion function.
Currently, the disassemble command calls the generic
location_completer function, however, the disassemble docs say:
Note that the 'disassemble' command's address arguments are specified
using expressions in your programming language (*note Expressions:
Expressions.), not location specs (*note Location Specifications::).
So, for example, if you want to disassemble function 'bar' in file
'foo.c', you must type 'disassemble 'foo.c'::bar' and not 'disassemble
foo.c:bar'.
And indeed, if I try:
(gdb) disassemble hello.c:main
No symbol "hello" in current context.
(gdb) disassemble hello.c::main
No symbol "hello" in current context.
(gdb) disassemble 'hello.c'::main
Dump of assembler code for function main:
... snip ...
But, if I do this:
(gdb) disassemble hell<TAB>
(gdb) disassemble hello.c:<CURSOR>
which is a consequence of using the location_completer function. So
in this commit, after calling skip_over_slash_fmt, I forward the bulk
of the disassemble command completion to expression_completer. Now
when I try this:
(gdb) disassemble hell<TAB>
gives nothing, which I think is an improvement. There is one slight
disappointment, if I do:
(gdb) disassemble 'hell<TAB>
I still get nothing. I had hoped that this would expand to:
'hello.c':: but I guess this is a limitation of the current
expression_completer implementation, however, I don't think this is a
regression, the previous expansion was just wrong. Fixing
expression_completer is out of scope for this commit.
I've added some disassembler command completion tests, and also a test
that disassembling using 'FILE'::FUNC syntax works, as I don't think
that is tested anywhere.
Andrew Burgess [Fri, 20 Oct 2023 13:20:35 +0000 (14:20 +0100)]
gdb: make skip_over_slash_fmt available outside printcmd.c
Move the function skip_over_slash_fmt into completer.c, and make it
extern, with a declaration in completer.h.
This is a refactor in order to support the next commit. I've not
changed any of the code in skip_over_slash_fmt.
There should be no user visible changes after this commit.
Andrew Burgess [Fri, 20 Oct 2023 10:15:51 +0000 (11:15 +0100)]
gdb: error if /r and /b are used with disassemble command
The disassembler gained a new /b flag in this commit:
commit
d4ce49b7ac077a9882d6a5e689e260300045ca88
Date: Tue Jun 21 20:23:35 2022 +0100
gdb: disassembler opcode display formatting
The /b and /r flags result in the instruction opcodes displayed in
different formats, so it's not possible to have both at the same
time. Currently the /b flag overrides the /r flag.
We have a similar situation with the /m and /s flags, but here, if the
user tries to use both flags then they will get an error.
I think the error is clearer, so in this commit I propose that we add
an error if /r and /b are both used.
Obviously this change breaks backwards compatibility. I don't have a
compelling argument for why we should make the change beyond my
feeling that it was a mistake not to add this error from the start,
and that the new behaviour is better.
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
Jan Beulich [Wed, 8 Nov 2023 08:29:39 +0000 (09:29 +0100)]
gas: S_GET_{NAME,SEGMENT}() don't alter their input symbol
Make their parameters pointer-to-const, thus allowing callers to also be
const-correct where possible.
Clément Chigot [Mon, 6 Nov 2023 09:50:23 +0000 (10:50 +0100)]
ld: print branch fixups into the map file for ppc elf targets
In a safety context, it could interesting to track the trampolines being
generated, ensuring there are expected or not.
bfd/ChangeLog:
* elf32-ppc.c (ppc_elf_relax_section): Log branch fixups.
ld/ChangeLog:
* ld.texi (--print-map): Add new item about fixups.
Tom Tromey [Wed, 6 Sep 2023 01:05:40 +0000 (19:05 -0600)]
Add minimal thread-safety to BFD
This patch provides some minimal thread-safety to BFD.
The BFD client can request thread-safety by providing a lock and
unlock function. The globals used during BFD creation (e.g.,
bfd_id_counter) are then locked, and the file descriptor cache is also
locked. A function to clean up any thread-local data is now provided
for BFD clients.
* bfd-in2.h: Regenerate.
* bfd.c (lock_fn, unlock_fn): New globals.
(bfd_thread_init, bfd_thread_cleanup, bfd_lock, bfd_unlock): New
functions.
* cache.c (bfd_cache_lookup_worker): Use _bfd_open_file_unlocked.
(cache_btell, cache_bseek, cache_bread, cache_bwrite): Lock
and unlock.
(cache_bclose): Add comment.
(cache_bflush, cache_bstat, cache_bmmap): Lock and unlock.
(_bfd_cache_init_unlocked): New function.
(bfd_cache_init): Use it. Lock and unlock.
(_bfd_cache_close_unlocked): New function.
(bfd_cache_close, bfd_cache_close_all): Use it. Lock and unlock.
(_bfd_open_file_unlocked): New function.
(bfd_open_file): Use it. Lock and unlock.
* doc/bfd.texi (BFD front end): Add Threading menu item.
* libbfd.h: Regenerate.
* opncls.c (_bfd_new_bfd): Lock and unlock.
* po/bfd.pot: Regenerate.
Tom Tromey [Sun, 27 Aug 2023 17:37:38 +0000 (11:37 -0600)]
Make various error-related globals thread-local
This changes bfd_error et al to be thread-local.
* Makefile.in: Regenerate.
* aclocal.m4: Include ax_tls.m4.
* ax_tls.m4: New file.
* bfd.c: (bfd_error, input_error, input_bfd, _bfd_error_buf):
Now thread-local.
(bfd_asprintf): Update docs.
* config.in, configure: Regenerate.
* configure.ac: Call AX_TLS.
* po/bfd.pot: Regenerate.
Tom Tromey [Sun, 27 Aug 2023 18:11:00 +0000 (12:11 -0600)]
Make _bfd_error_buf static
This makes _bfd_error_buf static and adds a way to clear it. I felt
that this made the subsequent patches a little cleaner.
* bfd.c (_bfd_error_buf): Now static.
(bfd_set_input_error): Use _bfd_clear_error_data.
(_bfd_clear_error_data): New function.
(bfd_init): Use _bfd_clear_error_data.
* libbfd.h: Regenerate.
* opncls.c (bfd_close_all_done): Use _bfd_clear_error_data.
* po/bfd.pot: Regenerate.
GDB Administrator [Wed, 8 Nov 2023 00:00:26 +0000 (00:00 +0000)]
Automatic date update in version.in
Victor Do Nascimento [Tue, 12 Sep 2023 12:10:14 +0000 (13:10 +0100)]
aarch64: Add LSE128 instructions
Implement, together with the necessary tests, the following new LSE128
atomic instructions:
* Atomic bit clear on quadword in memory (ldclrp{a|l|al});
* Atomic bit set on quadword in memory (ldsetp{a|l|al});
* Swap quadword in memory (swpp{a|l|al});
gas/ChangeLog:
* testsuite/gas/aarch64/lse128-atomic.d: New.
* testsuite/gas/aarch64/lse128-atomic.s: Likewise.
opcodes/ChangeLog:
* aarch64-tbl.h (ldclrp): new _LSE128_INSN entry.
(ldclrpa): Likewise.
(ldclrpal): Likewise.
(ldclrpl): Likewise.
(ldsetp): Likewise.
(ldsetpa): Likewise.
(ldsetpal): Likewise.
(ldsetpl): Likewise.
(swpp): Likewise.
(swppa): Likewise.
(swppal): Likewise.
(swppl): Likewise.
* aarch64-asm-2.c: Regenerate.
* aarch64-dis-2.c: Likewise.
* aarch64-opc-2.c: Likewise.
Victor Do Nascimento [Mon, 30 Oct 2023 12:39:28 +0000 (12:39 +0000)]
aarch64: Add arch support for LSE128 extension
Enable the `+lse128' feature modifier which, together with new
internal feature flags, enables LSE128 instructions, which are
represented via the new `_LSE128_INSN' macro.
gas/ChangeLog:
* config/tc-aarch64.c (aarch64_features): Add new "lse128"
entry.
include/ChangeLog:
* include/opcode/aarch64.h (enum aarch64_feature_bit): New
AARCH64_FEATURE_LSE128 feature bit.
(enum aarch64_insn_class): New lse128_atomic instruction class.
opcodes/ChangeLog:
* opcodes/aarch64-tbl.h (aarch64_feature_lse128): New.
(LSE128): Likewise.
(_LSE128_INSN): Likewise.
Victor Do Nascimento [Mon, 30 Oct 2023 11:47:23 +0000 (11:47 +0000)]
aarch64: Add LSE128 instruction operand support
Given the particular encoding of the LSE128 instructions, create the
necessary shared input+output operand register description and
handling in the code to allow for the encoding of the LSE128 128-bit
atomic operations.
gas/ChangeLog:
* config/tc-aarch64.c (parse_operands):
include/ChangeLog:
* opcode/aarch64.h (enum aarch64_opnd):
opcodes/ChangeLog:
* aarch64-opc.c (fields):
(aarch64_print_operand):
* aarch64-opc.h (enum aarch64_field_kind):
* aarch64-tbl.h (AARCH64_OPERANDS):
Victor Do Nascimento [Wed, 1 Nov 2023 13:18:08 +0000 (13:18 +0000)]
aarch64: Add 128-bit system register flags
In preparation for the implementation of 128-bit system register
support across the toolchain, this patch adds the feature flag
F_REG_128 and adds it to relevant system registers in
`aarch64-sys-regs.def'.
Given the shared nature of this file, this change is made necessary
initially to implement argument validation in the `__arm_rsr128' and
`__armwsr128' ACLE intrinsics in GCC, but will be of subsequent use in
the binutils implementation of the corresponding `mrrs' and `msrr'
instructions.
Regression tested on aarch64-linux-gnu, no regressions.
opcodes/ChangeLog:
* aarch64-opc.h (F_REG_128): New flag.
* aarch64-sys-regs.def (par_el1): Add F_REG_128 flag.
(rcwmask_el1): Likewise.
(rcwsmask_el1): Likewise.
(ttbr0_el1): Likewise.
(ttbr0_el12): Likewise.
(ttbr0_el2): Likewise.
(ttbr1_el1): Likewise.
(ttbr1_el12): Likewise.
(ttbr1_el2): Likewise.
(vttbr_el2): Likewise.
Victor Do Nascimento [Wed, 1 Nov 2023 13:44:45 +0000 (13:44 +0000)]
aarch64: Add THE system register support
Add Binutils support for system registers associated with the
Translation Hardening Extension (THE).
In doing so, we also add core feature support for THE, enabling its
associated feature flag and implementing the necessary
feature-checking machinery.
Regression tested on aarch64-linux-gnu, no regressions.
gas/ChangeLog:
* config/tc-aarch64.c (aarch64_features): Add "+the" feature modifier.
* doc/c-aarch64.texi (AArch64 Extensions): Update
documentation for `the' option.
* testsuite/gas/aarch64/sysreg-8.s: Add tests for `the'
associated system registers.
* testsuite/gas/aarch64/sysreg-8.d: Likewise.
include/ChangeLog:
* opcode/aarch64.h (enum aarch64_feature_bit): Add
AARCH64_FEATURE_THE.
opcode/ChangeLog:
* aarch64-opc.c (aarch64_sys_ins_reg_supported_p): Add `the'
system register check support.
* aarch64-sys-regs.def: Add `rcwmask_el1' and `rcwsmask_el1'
* aarch64-tbl.h: Define `THE' preprocessor macro.
Simon Marchi [Tue, 7 Nov 2023 16:11:18 +0000 (11:11 -0500)]
gdb/arm: remove thumb bit in arm_adjust_breakpoint_address
When compiling gdb with -fsanitize=address on ARM, I get a crash in test
gdb.arch/arm-disp-step.exp, reproduced easily with:
$ ./gdb -nx -q --data-directory=data-directory testsuite/outputs/gdb.arch/arm-disp-step/arm-disp-step -ex "break *test_call_end"
Reading symbols from testsuite/outputs/gdb.arch/arm-disp-step/arm-disp-step...
=================================================================
==23295==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb4a14fd1 at pc 0x01a48871 bp 0xbeab8490 sp 0xbeab8494
Since it doesn't require running the program, it can be reproduced locally on a
dev machine other than ARM, after acquiring the test binary.
The length of the allocate buffer `buf` is 1, and we try to extract an
integer of size 2 from it. The length of 1 comes from the subtraction
`bpaddr - boundary`. Normally, on ARM, all instructions are aligned on
a multiple of 2, so it's weird for this subtraction to result in 1. In
this case, boundary comes from the result of find_pc_partial_function
returning 0x549:
(gdb) p/x bpaddr
$2 = 0x54a
(gdb) p/x boundary
$3 = 0x549
(gdb) p/x bpaddr - boundary
$4 = 0x1
0x549 is the address of the test_call_subr label, 0x548, with the thumb
bit enabled. Before doing some math with the address, I think we need
to strip the thumb bit, like is done elsewhere (for instance for bpaddr
earlier in the same function).
I wonder if find_pc_partial_function should do that itself, in order to
return an address that is suitable for arithmetic. In any case, that
would be a change with a broad impact, so for now just fix the issue
locally.
After the patch:
$ ./gdb -nx -q --data-directory=data-directory testsuite/outputs/gdb.arch/arm-disp-step/arm-disp-step -ex "break *test_call_end"
Reading symbols from testsuite/outputs/gdb.arch/arm-disp-step/arm-disp-step...
Breakpoint 1 at 0x54a: file /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.arch/arm-disp-step.S, line 103.
Change-Id: I74fc458dbea0d2c1e1f5eadd90755188df089288
Approved-By: Luis Machado <luis.machado@arm.com>
Jan Beulich [Tue, 7 Nov 2023 12:58:32 +0000 (13:58 +0100)]
ld/x86: reduce testsuite dependency on system object files
PR ld/30722
Tests looking for certain .note-section recorded properties may not
involve object files from the underlying platform (e.g. via using the C
compiler for linking): Such object files may themselves have similar
note sections, and hence they may influence the overall outcome.
For now convert just the tests known to be affected by crt*.o coming
with "ISA v3 needed" notes. Eventually other tests ought to be
converted, too.
Jan Beulich [Tue, 7 Nov 2023 12:54:57 +0000 (13:54 +0100)]
Revert "ld x86_64 tests: Accept x86-64-v3 as a needed ISA"
This reverts commit
bf77f42f6708d8b5ba92336d876042826d8d29c1.
It wrongly altered testcase expectations; the issue will need
taking care of differently.
Mary Bennett [Mon, 2 Oct 2023 02:02:06 +0000 (03:02 +0100)]
RISC-V: Add support for XCValu extension in CV32E40P
Spec: https://docs.openhwgroup.org/projects/cv32e40p-user-manual/en/latest/instruction_set_extensions.html
Contributors:
Mary Bennett <mary.bennett@embecosm.com>
Nandni Jamnadas <nandni.jamnadas@embecosm.com>
Pietra Ferreira <pietra.ferreira@embecosm.com>
Charlie Keaney
Jessica Mills
Craig Blackmore <craig.blackmore@embecosm.com>
Simon Cook <simon.cook@embecosm.com>
Jeremy Bennett <jeremy.bennett@embecosm.com>
Helene Chelin <helene.chelin@embecosm.com>
bfd/ChangeLog:
* elfxx-riscv.c (riscv_multi_subset_supports): Added `xcvalu`
instruction class.
(riscv_multi_subset_supports_ext): Likewise.
gas/ChangeLog:
* config/tc-riscv.c (validate_riscv_insn): Added the necessary
operands for the extension.
(riscv_ip): Likewise.
* doc/c-riscv.texi: Noted XCValu as an additional ISA extension
for CORE-V.
* testsuite/gas/riscv/cv-alu-boundaries.d: New test.
* testsuite/gas/riscv/cv-alu-boundaries.l: New test.
* testsuite/gas/riscv/cv-alu-boundaries.s: New test.
* testsuite/gas/riscv/cv-alu-fail-march.d: New test.
* testsuite/gas/riscv/cv-alu-fail-march.l: New test.
* testsuite/gas/riscv/cv-alu-fail-march.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-01.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-01.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-01.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-02.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-02.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-02.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-03.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-03.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-03.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-04.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-04.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-04.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-05.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-05.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-05.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-06.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-06.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-06.s: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-07.d: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-07.l: New test.
* testsuite/gas/riscv/cv-alu-fail-operand-07.s: New test.
* testsuite/gas/riscv/cv-alu-insns.d: New test.
* testsuite/gas/riscv/cv-alu-insns.s: New test.
opcodes/ChangeLog:
* riscv-dis.c (print_insn_args): Disassemble xcb operand.
* riscv-opc.c: Defined the MASK and added XCValu instructions.
include/ChangeLog:
* opcode/riscv-opc.h: Added corresponding MATCH and MASK macros
for XCValu.
* opcode/riscv.h: Added corresponding EXTRACT and ENCODE macros
for XCValu.
(enum riscv_insn_class): Added the XCValu instruction class.
Mary Bennett [Mon, 2 Oct 2023 02:02:05 +0000 (03:02 +0100)]
RISC-V: Add support for XCVmac extension in CV32E40P
Spec: https://docs.openhwgroup.org/projects/cv32e40p-user-manual/en/latest/instruction_set_extensions.html
Contributors:
Mary Bennett <mary.bennett@embecosm.com>
Nandni Jamnadas <nandni.jamnadas@embecosm.com>
Pietra Ferreira <pietra.ferreira@embecosm.com>
Charlie Keaney
Jessica Mills
Craig Blackmore <craig.blackmore@embecosm.com>
Simon Cook <simon.cook@embecosm.com>
Jeremy Bennett <jeremy.bennett@embecosm.com>
Helene Chelin <helene.chelin@embecosm.com>
bfd/ChangeLog:
* elfxx-riscv.c (riscv_multi_subset_supports): Added `xcvmac`
instruction class.
(riscv_multi_subset_supports_ext): Likewise.
gas/ChangeLog:
* config/tc-riscv.c (validate_riscv_insn): Added the necessary
operands for the extension.
(riscv_ip): Likewise.
* doc/c-riscv.texi: Noted XCVmac as an additional ISA extension
for CORE-V.
* testsuite/gas/riscv/cv-mac-fail-march.d: New test.
* testsuite/gas/riscv/cv-mac-fail-march.l: New test.
* testsuite/gas/riscv/cv-mac-fail-march.s: New test.
* testsuite/gas/riscv/cv-mac-fail-operand.d: New test.
* testsuite/gas/riscv/cv-mac-fail-operand.l: New test.
* testsuite/gas/riscv/cv-mac-fail-operand.s: New test.
* testsuite/gas/riscv/cv-mac-insns.d: New test.
* testsuite/gas/riscv/cv-mac-insns.s: New test.
opcodes/ChangeLog:
* riscv-dis.c (print_insn_args): Disassemble information with
the EXTRACT macro implemented.
* riscv-opc.c: Defined the MASK and added
XCVmac instructions.
include/ChangeLog:
* opcode/riscv-opc.h: Added corresponding MATCH and MASK macros
for XCVmac.
* opcode/riscv.h: Added corresponding EXTRACT and ENCODE macros
for uimm.
(enum riscv_insn_class): Added the XCVmac instruction class.
Tom Tromey [Mon, 6 Nov 2023 16:31:03 +0000 (09:31 -0700)]
Remove EXTERN_C and related defines
common-defs.h has a few defines that I suspect were used during the
transition to C++. These aren't needed any more, so remove them.
Tested by rebuilding.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Approved-By: Andrew Burgess <aburgess@redhat.com>
GDB Administrator [Tue, 7 Nov 2023 00:00:18 +0000 (00:00 +0000)]
Automatic date update in version.in
Carl Love [Mon, 6 Nov 2023 22:08:27 +0000 (17:08 -0500)]
gdb: Update email address for Carl Love in gdb/MAINTAINERS
Hannes Domani [Mon, 6 Nov 2023 17:32:41 +0000 (18:32 +0100)]
Fix resizing of TUI python windows
When resizing from a big to small terminal size, and you have a
TUI python window that would then be outside of the new size,
valgrind shows this error:
==3389== Invalid read of size 1
==3389== at 0xC3DFEE: wnoutrefresh (lib_refresh.c:167)
==3389== by 0xC3E3C9: wrefresh (lib_refresh.c:63)
==3389== by 0xA9766C: tui_unhighlight_win(tui_win_info*) (tui-wingeneral.c:134)
==3389== by 0x98921C: tui_py_window::rerender() (py-tui.c:183)
==3389== by 0xA8C23C: tui_layout_split::apply(int, int, int, int, bool) (tui-layout.c:1030)
==3389== by 0xA8C2A2: tui_layout_split::apply(int, int, int, int, bool) (tui-layout.c:1033)
==3389== by 0xA8C23C: tui_layout_split::apply(int, int, int, int, bool) (tui-layout.c:1030)
==3389== by 0xA8B1F8: tui_apply_current_layout(bool) (tui-layout.c:81)
==3389== by 0xA95CDB: tui_resize_all() (tui-win.c:525)
==3389== by 0xA95D1E: tui_async_resize_screen(void*) (tui-win.c:562)
==3389== by 0x6B855D: invoke_async_signal_handlers() (async-event.c:234)
==3389== by 0xC0CEF8: gdb_do_one_event(int) (event-loop.cc:199)
==3389== Address 0x115cc214 is 1,332 bytes inside a block of size 2,240 free'd
==3389== at 0x4A0A430: free (vg_replace_malloc.c:446)
==3389== by 0xC3CF7D: _nc_freewin (lib_newwin.c:121)
==3389== by 0xA8B1C6: tui_apply_current_layout(bool) (tui-layout.c:78)
==3389== by 0xA95CDB: tui_resize_all() (tui-win.c:525)
==3389== by 0xA95D1E: tui_async_resize_screen(void*) (tui-win.c:562)
==3389== by 0x6B855D: invoke_async_signal_handlers() (async-event.c:234)
==3389== by 0xC0CEF8: gdb_do_one_event(int) (event-loop.cc:199)
==3389== by 0x8E40E9: captured_command_loop() (main.c:407)
==3389== by 0x8E5E54: gdb_main(captured_main_args*) (main.c:1324)
==3389== by 0x62AC04: main (gdb.c:39)
It's because tui_py_window::m_inner_window still has the outside
coordinates, and wnoutrefresh then does an out-of-bounds access.
Fix this by resetting m_inner_window on every resize, it will anyways
be recreated in the next rerender call.
Approved-By: Andrew Burgess <aburgess@redhat.com>
Aditya Vidyadhar Kamath [Mon, 6 Nov 2023 13:26:24 +0000 (07:26 -0600)]
Change gdb.base/examine-backwards.exp for AIX.
In AIX unused or constant variables are collected as garbage by the linker and in the dwarf dump
an address with all f's in hexadecimal are assigned. Hence the testcase fails with many failures stating
it cannot access memory.
This patch is a small change to get it working in AIX as well.
Nick Clifton [Mon, 6 Nov 2023 13:59:53 +0000 (13:59 +0000)]
ld: =fillexp different behaviors for hexidecimal literal
PR 30865
* ld.texi: Update description of the FILL command.
* testsuite/ld-scripts/fill2.d: New test.
* testsuite/ld-scripts/fill2.t: New test source.
* testsuite/ld-scripts/data.exp: Run the new test.
Nelson Chu [Mon, 6 Nov 2023 09:33:21 +0000 (17:33 +0800)]
RISC-V: Make sure rv32q conflict won't affect the fp-q-insns-32 gas testcase.
Same as commit
4352c0ac04a.
gas/
* testsuite/gas/riscv/fp-q-insns-32.d: Set q to v2.2.
Nelson Chu [Mon, 6 Nov 2023 05:28:51 +0000 (13:28 +0800)]
RISC-V: Moved out linker internal relocations after R_RISCV_max.
Just the lightest modifications about this, without any further checks and
considering --emit-relocs. We will need to improve it in the future, but
first do this to avoid conflicts between linker internal relocations and the
new definition of psabi. For example, TLSDESC relocs.
Passed riscv-gnu-toolchain regressions, so should be safe enough to commit.
Co-authored-by: Tsukasa OI <research_trasio@irq.a4lg.com>
bfd/
* reloc.c: Removed linker internal relocations.
* bfd-in2.h: Regenerated.
* libbfd.h: Regenerated.
* elfnn-riscv.c: Defined R_RISCV_DELETE in include/elf/riscv.h.
* elfxx-riscv.c (howto_table, howto_table_internal): Moved linker
internal relocations from howto_table into howto_table_internal.
(riscv_reloc_map): Removed linker internal relocations mapping.
(riscv_elf_rtype_to_howto): Return howto of linker internal
relocations from howto_table_internal.
include/
* elf/riscv.h: Defined linker internal relocations after R_RISCV_max.
Tom de Vries [Mon, 6 Nov 2023 07:32:54 +0000 (08:32 +0100)]
[gdb/testsuite] Fix gdb.dwarf2/dw2-gas-workaround.exp
Recently added test-case gdb.dwarf2/dw2-gas-workaround.exp:
- passes when gdb is configured using $(cd ../src; pwd)/configure, but
- fails when using ../src/configure.
Fix this by making the matching more precise:
...
- -re -wrap "$objdir.*" {
+ -re -wrap "name_for_id = $objdir/$srcfile\r\n.*" {
...
such that we only fail on the line:
...
[symtab-create] start_subfile: name = dw2-lines.c, name_for_id = \
/data/vries/gdb/leap-15-4/build/gdb/testsuite/dw2-lines.c^M
...
Reported-By: Carl Love <cel@us.ibm.com>
GDB Administrator [Mon, 6 Nov 2023 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Mon, 23 Oct 2023 22:44:53 +0000 (16:44 -0600)]
Pre-read DWZ file in DWARF reader
While working on background reading of DWARF, I came across the
DWZ-reading code. This code can query the user (via the debuginfod
support) -- something that cannot be done off the main thread.
Looking into it, I realized that this code can be run much earlier,
avoiding this problem. Digging a bit deeper, I also found a
discrepancy here between how the DWARF reader works in "readnow" mode
as compared to the normal modes.
This patch cleans this up by trying to read the DWZ file earlier, and
also by having the DWARF reader convert any exception here into a
warning. This unifies the various cases, but also makes it so that
errors do not prevent gdb from continuing on to the extent possible.
Regression tested on x86-64 Fedora 38.
GDB Administrator [Sun, 5 Nov 2023 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in
GDB Administrator [Sat, 4 Nov 2023 00:00:10 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Fri, 3 Nov 2023 19:24:08 +0000 (13:24 -0600)]
Remove unused declaration
I found a declaration in py-stopevent.h for which there is no
definition. This patch removes it.
Simon Marchi [Fri, 3 Nov 2023 03:19:09 +0000 (23:19 -0400)]
gdbsupport: mark array_view::slice with [[nodiscard]]
I (almost) had a bug where I did:
buffer.slice (...)
but I meant:
buffer = buffer.slice (...)
The first one does nothing, it creates a new array_view but without
using it, it's useless. Mark the slice methods with [[nodiscard]]
(which is standard C++17) so that error would generate a warning.
I guess that many functions could be marked as nodiscard, essentially
function that is pure (doesn't have side-effects). But this one seems
particularly easy to mis-use.
Change-Id: Ib39a0a65a5728a3cfd68a02ae31635810baeaccb
Approved-By: Tom Tromey <tom@tromey.com>
Simon Marchi [Fri, 3 Nov 2023 15:51:37 +0000 (11:51 -0400)]
gdbsupport: record and print failed selftest names
Since "maint selftest" now runs quite a lot of tests (especially in an
all-targets build), I thought it would be useful to print a summary at
the end of what failed. So, implement that.
Print the summary before the "Ran %d unit tests, %zu failed\n" line, so
that that one remains the last line, and the gdb.gdb/unittest.exp
doesn't need to be changed.
The output looks like (if I force a failure in a test):
(gdb) maint selftest
...
Running selftest value_copy.
Running selftest xml_escape_text.
Running selftest xml_escape_text_append.
Failures:
aarch64-analyze-prologue
Ran 4134 unit tests, 1 failed
(gdb)
Change-Id: If3aaabdd6f8078d0e6e50e8d08f3e558ab85277e
Approved-By: Tom Tromey <tom@tromey.com>
Jan Beulich [Fri, 3 Nov 2023 12:33:38 +0000 (13:33 +0100)]
gas: correct ignoring of C-style number suffixes
First of all the respective original changes didn't deal with just 0
having such a suffix - this needs additional logic outside of
integer_constant(). Further bogus suffixes having more than two L-s
were accepted, while valid suffixes with U following the L(s) weren't.
Finally respective tests were introduced for Sparc only.
Reviewed-by: Neal Frager <neal.frager@amd.com>
Jan Beulich [Fri, 3 Nov 2023 09:03:36 +0000 (10:03 +0100)]
RISC-V: reduce redundancy in load/store macro insn handling
Within the groups L{B,BU,H,HU,W,WU,D}, S{B,H,W,D}, FL{H,W,D,Q}, and
FS{H,W,D,Q} the sole difference between the handling is the insn
mnemonic passed to the common handling functions. The intended mnemonic,
however, can easily be retrieved. Furthermore leverags that Sx and FSx
are then handled identically, too, and hence their cases can also be
folded.
Jan Beulich [Fri, 3 Nov 2023 09:03:03 +0000 (10:03 +0100)]
RISC-V: Lx/Sx macro insn tests
Make sure these (continue to) work as intended.
Jan Beulich [Fri, 3 Nov 2023 09:02:27 +0000 (10:02 +0100)]
RISC-V: add F- and D-extension testcases
Make sure future changes won't regress any of this. Also cover the FLH
and FSH macro insns of the Zfh extension.
Jan Beulich [Fri, 3 Nov 2023 09:01:19 +0000 (10:01 +0100)]
RISC-V: make FLQ/FSQ macro-insns work
When support for the Q extension was added, the libopcodes side of these
macro-insns was properly covered, but no backing support in gas was
added. In new testcases cover not just these, but all Q-extension insns.
GDB Administrator [Fri, 3 Nov 2023 00:00:13 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom de Vries [Thu, 2 Nov 2023 18:05:21 +0000 (19:05 +0100)]
[gdb/tdep] Fix nr array elements in ppc64_aggregate_candidate
On AlmaLinux 9.2 powerpc64le I run into:
...
(gdb) PASS: gdb.ada/array_return.exp: continuing to Create_Small_Float_Vector
finish^M
Run till exit from #0 pck.create_small_float_vector () at pck.adb:30^M
0x00000000100022d4 in p () at p.adb:25^M
25 Vector := Create_Small_Float_Vector;^M
Value returned is $3 = (2.
80259693e-45, 2.
80259693e-45)^M
(gdb) FAIL: gdb.ada/array_return.exp: value printed by finish of Create_Small_Float_Vector
...
while this is expected:
...
Value returned is $3 = (4.25, 4.25)^M
...
The problem is here in ppc64_aggregate_candidate:
...
if (!get_array_bounds (type, &low_bound, &high_bound))
return -1;
count *= high_bound - low_bound
...
The array type (containing 2 elements) is:
...
type Small_Float_Vector is array (1 .. 2) of Float;
...
so we have:
...
(gdb) p low_bound
$1 = 1
(gdb) p high_bound
$2 = 2
...
but we calculate the number of elements in the array using
"high_bound - low_bound", which is 1.
Consequently, gdb fails to correctly classify the type as a ELFv2 homogeneous
aggregate.
Fix this by calculating the number of elements in the array by using
"high_bound - low_bound + 1" instead.
Furthermore, high_bound can (in general, though perhaps not here) also be
smaller than low_bound, so to be safe take that into account as well:
...
LONGEST nr_array_elements = (low_bound > high_bound
? 0
: (high_bound - low_bound + 1));
count *= nr_array_elements;
...
Tested on powerpc64le-linux.
Approved-By: Ulrich Weigand <uweigand@de.ibm.com>
PR tdep/31015
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31015
Srinath Parvathaneni [Thu, 2 Nov 2023 13:10:37 +0000 (13:10 +0000)]
aarch64: Add GCS system registers.
This patch adds support for 10 new AArch64 system registers
(gcscre0_el1, gcscr_el1, gcscr_el12, gcscr_el2, gcscr_el3,
gcspr_el0, gcspr_el1 ,gcspr_el12, gcspr_el2 and gcspr_el3),
which are enabled on using Guarded Control Stack (+gcs flag)
feature.
Srinath Parvathaneni [Thu, 2 Nov 2023 13:07:29 +0000 (13:07 +0000)]
aarch64: Add support for GCSB DSYNC instruction.
This patch adds support for Guarded control stack data synchronization
instruction (GCSB DSYNC). This instruction is allocated to existing
HINT space and uses the HINT number 19 and to match this an entry is
added to the aarch64_hint_options array.
srinath [Thu, 2 Nov 2023 13:04:20 +0000 (13:04 +0000)]
aarch64: Add support for GCS extension.
This patch adds for Guarded Control Stack Extension (GCS) extension. GCS feature is
optional from Armv9.4-A architecture and enabled by passing +gcs option to -march
(eg: -march=armv9.4-a+gcs) or using ".arch_extension gcs" directive in the assembly file.
Also this patch adds support for GCS instructions gcspushx, gcspopcx, gcspopx,
gcsss1, gcsss2, gcspushm, gcspopm, gcsstr and gcssttr.
Srinath Parvathaneni [Thu, 2 Nov 2023 12:44:13 +0000 (12:44 +0000)]
aarch64: Add support for Check Feature Status Extension.
This patch adds support for Check Feature Status Extension (CHK) which
is mandatory from Armv8.0-A. Also this patch supports "chkfeat" instruction
(hint #40).
srinath [Thu, 2 Nov 2023 12:40:29 +0000 (12:40 +0000)]
aarch64: Add support for Armv8.9-A and Armv9.4-A Architectures.
This patch adds AArch64 support for Armv8.9-A architecture (-march=armv8.9-a)
and Armv9.4-A architecture (-march=armv9.4-a).
Nick Clifton [Thu, 2 Nov 2023 09:57:39 +0000 (09:57 +0000)]
ld x86_64 tests: Accept x86-64-v3 as a needed ISA
* testsuite/ld-x86-64/property-3.r: Update regexp to allow for targets which support x86-64-v3.
* testsuite/ld-x86-64/property-4.r: Likewise.
* testsuite/ld-x86-64/property-5.r: Likewise.
Vladimir Mezentsev [Tue, 31 Oct 2023 19:11:45 +0000 (12:11 -0700)]
gprofng: remove dependency on help2man
help2man is no longer used to create the gprofng man pages.
gprofng/ChangeLog
2023-10-31 Vladimir Mezentsev <vladimir.mezentsev@oracle.com>
* configure.ac: Remove HELP2MAN.
* Makefile.in: Rebuild.
* configure: Rebuild.
* doc/Makefile.in: Rebuild.
* gp-display-html/Makefile.in: Rebuild.
* src/Makefile.in: Rebuild.
GDB Administrator [Thu, 2 Nov 2023 00:00:15 +0000 (00:00 +0000)]
Automatic date update in version.in
Simon Marchi [Tue, 31 Oct 2023 03:22:03 +0000 (03:22 +0000)]
gdb: use gdb::byte_vector instead of gdb::def_vector<gdb_byte>
Use the gdb::byte_vector typedef when possible.
Change-Id: Ib2199201c052496992011ea02979de023d4d8a9a
Nick Clifton [Wed, 1 Nov 2023 15:51:44 +0000 (15:51 +0000)]
Fix typo in recent update to the ld/NEWS file
Nick Clifton [Wed, 1 Nov 2023 13:51:17 +0000 (13:51 +0000)]
ld: Support input section description keyword: REVERSE
PR 27565
* ldlex.l: Add REVERSE.
* ldgram.y: Allow REVERSE to be used wherever a sorting command can be used.
* ld.h (struct wildcard_spec): Add 'reversed' field.
* ldlang.h (lang_wild_statement_struct): Add 'filenames_reversed' field.
* ldlang.c (compare_sections): Add reversed parameter. (wild_sort): Reverse the comparison if requested. (print_wild_statement): Handle the reversed field.
* ld.texi: Document the new feature.
* NEWS: Mention the new feature.
* testsuite/ld-scripts/sort-file-reversed-1.d: New test driver.
* testsuite/ld-scripts/sort-file-reversed-1.t: New test source.
* testsuite/ld-scripts/sort-file-reversed-2.t: New test source.
* testsuite/ld-scripts/sort-file-reversed-2.d: New test driver.
* testsuite/ld-scripts/sort-sections-reversed-1.d: New test driver.
* testsuite/ld-scripts/sort-sections-reversed-1.t: New test source.
* testsuite/ld-scripts/sort-sections-reversed-2.t: New test source.
* testsuite/ld-scripts/sort-sections-reversed-2.d: New test driver.
* testsuite/ld-scripts/sort-sections-reversed-3.d: New test driver.
* testsuite/ld-scripts/sort-sections-reversed-3.t: New test source.
GDB Administrator [Wed, 1 Nov 2023 00:00:16 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom de Vries [Tue, 31 Oct 2023 23:33:12 +0000 (00:33 +0100)]
[gdb/symtab] Work around gas PR28629
When running test-case gdb.tui/tui-layout-asm-short-prog.exp on AlmaLinux 9.2
ppc64le, I run into:
...
FAIL: gdb.tui/tui-layout-asm-short-prog.exp: check asm box contents
...
The problem is that we get:
...
7 [ No Assembly Available ]
...
because tui_get_begin_asm_address doesn't succeed.
In more detail, tui_get_begin_asm_address calls:
...
find_line_pc (sal.symtab, sal.line, &addr);
...
with:
...
(gdb) p *sal.symtab
$5 = {next = 0x130393c0, m_compunit = 0x130392f0, m_linetable = 0x0,
filename = "tui-layout-asm-short-prog.S",
filename_for_id = "$gdb/build/gdb/testsuite/tui-layout-asm-short-prog.S",
m_language = language_asm, fullname = 0x0}
(gdb) p sal.line
$6 = 1
...
The problem is the filename_for_id which is the source file prefixed with the
compilation dir rather than the source dir.
This is due to faulty debug info generated by gas, PR28629:
...
<1a> DW_AT_name : tui-layout-asm-short-prog.S
<1e> DW_AT_comp_dir : $gdb/build/gdb/testsuite
<22> DW_AT_producer : GNU AS 2.35.2
...
The DW_AT_name is relative, and it's relative to the DW_AT_comp_dir entry,
making the effective name $gdb/build/gdb/testsuite/tui-layout-asm-short-prog.S.
The bug is fixed starting version 2.38, where we get instead:
...
<1a> DW_AT_name :
$gdb/src/gdb/testsuite/gdb.tui/tui-layout-asm-short-prog.S
<1e> DW_AT_comp_dir : $gdb/build/gdb/testsuite
<22> DW_AT_producer : GNU AS 2.38
...
Work around the faulty debug info by constructing the filename_for_id using
the second directory from the directory table in the .debug_line header:
...
The Directory Table (offset 0x22, lines 2, columns 1):
Entry Name
0 $gdb/build/gdb/testsuite
1 $gdb/src/gdb/testsuite/gdb.tui
...
Note that the used gas contains a backport of commit
3417bfca676 ("GAS:
DWARF-5: Ensure that the 0'th entry in the directory table contains the
current working directory."), because directory 0 is correct. With the
unpatched 2.35.2 release the directory 0 entry is incorrect: it's a copy of
entry 1.
Add a dwarf assembly test-case that reflects the debug info as generated by
unpatched gas 2.35.2.
Tested on x86_64-linux.
Approved-By: Tom Tromey <tom@tromey.com>
Tom de Vries [Tue, 31 Oct 2023 23:33:12 +0000 (00:33 +0100)]
[gdb/symtab] Add producer_is_gas
Add producer_is_gas, a generic way to get the gas version from the
producer string.
Tested on x86_64-linux.
Tom Tromey [Thu, 5 Oct 2023 12:27:50 +0000 (06:27 -0600)]
Implement DAP setVariable request
This patch implements the DAP setVariable request.
setVariable is a bit odd in that it specifies the variable to modify
by passing in the variable's container and the name of the variable.
This approach can't handle variable shadowing (there are a couple of
open DAP bugs on this topic), so this patch renames duplicates to
avoid the problem.
Hu, Lin1 [Tue, 31 Oct 2023 08:23:53 +0000 (16:23 +0800)]
Support Intel USER_MSR
This patches aims to support Intel USER_MSR. In addition to the usual
support, this patch includes encoding and decoding support for MAP7 and
immediate numbers as the last operand (ATT style).
gas/ChangeLog:
* NEWS: Support Intel USER_MSR.
* config/tc-i386.c (smallest_imm_type): Reject imm32 in 64bit
mode.
(build_vex_prefix): Add VEXMAP7.
(md_assemble): Handling the imm32 of USER_MSR.
(match_template): Handling the unusual immediate.
* doc/c-i386.texi: Document .user_msr.
* testsuite/gas/i386/i386.exp: Run USER_MSR tests.
* testsuite/gas/i386/x86-64.exp: Ditto.
* testsuite/gas/i386/user_msr-inval.l: New test.
* testsuite/gas/i386/user_msr-inval.s: Ditto.
* testsuite/gas/i386/x86-64-user_msr-intel.d: Ditto.
* testsuite/gas/i386/x86-64-user_msr-inval.l: Ditto.
* testsuite/gas/i386/x86-64-user_msr-inval.s: Ditto.
* testsuite/gas/i386/x86-64-user_msr.d: Ditto.
* testsuite/gas/i386/x86-64-user_msr.s: Ditto.
opcodes/ChangeLog:
* i386-dis.c (struct instr_info): Add a new attribute
has_skipped_modrm.
(Gq): New.
(Rq): Ditto.
(q_mm_mode): Ditto.
(Nq): Change mode from q_mode to q_mm_mode.
(VEX_LEN_TABLE):
(get_valid_dis386): Add VEX_MAP7 in VEX prefix.
and handle the map7_f8 for save space.
(OP_Skip_MODRM): Set has_skipped_modrm.
(OP_E): Skip codep++ when has skipped modrm byte.
(OP_R): Support q_mode and q_mm_mode.
(REG_VEX_MAP7_F8_L_0_W_0): New.
(PREFIX_VEX_MAP7_F8_L_0_W_0_R_0_X86_64): Ditto.
(X86_64_VEX_MAP7_F8_L_0_W_0_R_0): Ditto.
(VEX_LEN_MAP7_F8): Ditto.
(VEX_W_MAP7_F8_L_0): Ditto.
(MOD_0F38F8): Ditto.
(PREFIX_0F38F8_M_0): Ditto.
(PREFIX_0F38F8_M_1_X86_64): Ditto.
(X86_64_0F38F8_M_1): Ditto.
(PREFIX_0F38F8): Remove.
(prefix_table): Add PREFIX_0F38F8_M_1_X86_64.
Remove PREFIX_0F38F8.
(reg_table): Add REG_VEX_MAP7_F8_L_0_W_0,
PREFIX_VEX_MAP7_F8_L_0_W_0_R_0_X86_64.
(x86_64_table): Add X86_64_0F38F8_PREFIX_3_M_1,
X86_64_VEX_MAP7_F8_L_0_W_0_R_0 and X86_64_0F38F8_M_1.
(vex_table): Add VEX_MAP7.
(vex_len_table): Add VEX_LEN_MAP7_F8,
VEX_W_MAP7_F8_L_0.
(mod_table): New entry for USER_MSR and
add MOD_0F38F8.
* i386-gen.c (cpu_flag_init): Add CPU_USER_MSR_FLAGS and
CPU_ANY_USER_MSR_FLAGS. Add add VEXMAP7.
* i386-init.h: Regenerated.
* i386-mnem.h: Ditto.
* i386-opc.h (SPACE_VEXMAP7): New.
(CPU_USER_MSR_FLAGS): Ditoo.
(CPU_ANY_USER_MSR_FLAGS): Ditto.
(i386_cpu_flags): Add cpuuser_msr.
* i386-opc.tbl: Add USER_MSR instructions.
* i386-tbl.h: Regenerated.
Tom Tromey [Sat, 28 Oct 2023 17:46:33 +0000 (11:46 -0600)]
Remove some frame invalidation code
I stumbled across a few spots that mention that a function
"invalidates frame" and also assignments of NULL to a frame_info_ptr.
This code isn't harmful, but is also unnecessary since the
introduction of frame_info_ptr -- nowadays frame invalidations are
handled automatically.
Regression tested on x86-64 Fedora 38.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
GDB Administrator [Tue, 31 Oct 2023 00:00:22 +0000 (00:00 +0000)]
Automatic date update in version.in
Nick Clifton [Mon, 30 Oct 2023 15:18:15 +0000 (15:18 +0000)]
New Georgian translation for the ld sub-directory
Jose E. Marchesi [Mon, 30 Oct 2023 14:57:58 +0000 (15:57 +0100)]
gas: bpf: new test for MOV with C-like numbers ll suffix
The BPF pseudo-c syntax supports both MOV and LDDW instructions:
mov: r1 = EXPR
lddw: r1 = EXPR ll
Note that the white space between EXPR and `ll' is necessary in order
to avoid ambiguity with the assembler's support for C-like numerical
suffixes. This patch adds a new test to the GAS BPF testsuite to make
sure that instructions like:
r1 = 666ll
are interpreted as `mov %r1,666', not as `lddw %r1,666'.
This matches clang's assembler behavior.
2023-10-30 Jose E. Marchesi <jose.marchesi@oracle.com>
* testsuite/gas/bpf/alu-pseudoc.s: Add test to make sure C-like
suffix `ll' is not interpreted as lddw syntax.
* testsuite/gas/bpf/alu-pseudoc.d: Update expected results.
* testsuite/gas/bpf/alu-be-pseudoc.d: Likewise.
Tom Tromey [Wed, 20 Sep 2023 17:29:53 +0000 (11:29 -0600)]
Fix fixed-point "return" on ARM
On a big-endian ARM machine, the "return" command resulted in the
wrong value being returned when the function had a fixed-point return
type. This patch fixes the problem by unpacking and repacking the
fixed-point type appropriately.
Approved-By: Luis Machado <luis.machado@arm.com>
Tom Tromey [Wed, 20 Sep 2023 16:04:12 +0000 (10:04 -0600)]
Fix range-type "return" command on ARM
On big-endian ARM, "return"ing from a function that returned a range
type did not work. This patch strips the range type to treat the
function as though it were returning the underlying type instead.
Approved-By: Luis Machado <luis.machado@arm.com>
Tom Tromey [Wed, 20 Sep 2023 15:16:19 +0000 (09:16 -0600)]
Fix "finish" for vector types on ARM
On a big-endian ARM system, "finish" printed the wrong value when
finishing from a function that returned a vector type. Similarly,
calls to a function also resulted in the wrong value being passed. I
think both the read- and write-functions here should ignore the
endian-ness.
I tested this using the AdaCore internal test suite; the test case
that caught this is identical to gdb.base/gnu_vector.exp.
Approved-By: Luis Machado <luis.machado@arm.com>
Tom Tromey [Wed, 20 Sep 2023 13:50:58 +0000 (07:50 -0600)]
Fix "finish" with range types on ARM
On ARM (I tested big-endian but it may not matter), "finish" can
sometimes print the wrong result when the return type is a range type.
Range types should really be treated as their underlying type
(normally integer, but sometimes fixed-point). This patch implements
this.
Approved-By: Luis Machado <luis.machado@arm.com>
Tom Tromey [Wed, 20 Sep 2023 13:38:54 +0000 (07:38 -0600)]
Fix calls with small integers on ARM
On big-endian ARM, an inferior call with a small integer will pass the
wrong value. This patch fixes the problem. Because the code here
works using scalar values, and not just bytes, left-shifting is
unnecessary.
Approved-By: Luis Machado <luis.machado@arm.com>
Nick Clifton [Mon, 30 Oct 2023 12:17:53 +0000 (12:17 +0000)]
Accept and ignore the R_BPF_64_NODLYD32 relocation.
Victor Do Nascimento [Mon, 16 Oct 2023 09:44:46 +0000 (10:44 +0100)]
aarch64: Update aarch64-sys-regs.def header
Given the shared use of the aarch64-sys-regs.def file across Binutils
and GCC, add instructions for keeping the file synchronized across the
two codebases.
Namely, it should be made clear that all changes are first to be made
in Binutils and the updated file copied across to GCC.
opcodes/ChangeLog
* opcodes/aarch64-sys-regs.def: Update file-description header
comment.
GDB Administrator [Mon, 30 Oct 2023 00:00:18 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Sat, 14 Oct 2023 19:31:57 +0000 (13:31 -0600)]
Move read_addrmap_from_aranges to new file
In the interest of shrinking dwarf2/read.c a little more, this patch
moves the code that deciphers .debug_aranges into a new file.
Reviewed-By: Guinevere Larsen <blarsen@redhat.com>
Tom Tromey [Sat, 14 Oct 2023 18:31:31 +0000 (12:31 -0600)]
Pre-read .debug_aranges section
While working on background DWARF reading, I found a race case that I
tracked down to the handling of the .debug_aranges section. Currently
the section data is only read in after the CUs have all been created.
However, there's no real reason to do this -- it seems fine to read it
a little earlier, when all the other necessary sections are read in.
This patch makes this change, and updates the
read_addrmap_from_aranges API to assert that the section is read in.
This patch slightly changes the read_addrmap_from_aranges API as well,
to reject an empty section. This seems better to me than what the
current code does, which is try to read an empty section but then do
no work.
Regression tested on x86-64 Fedora 38.
Reviewed-By: Guinevere Larsen <blarsen@redhat.com>
GDB Administrator [Sun, 29 Oct 2023 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in
Lancelot Six [Tue, 12 Sep 2023 12:34:51 +0000 (12:34 +0000)]
gdb/gdbsupport/gdbserver: Require c++17
This patch proposes to require a C++17 compiler to build gdb /
gdbsupport / gdbserver. Before this patch, GDB required a C++11
compiler.
The general policy regarding bumping C++ language requirement in GDB (as
stated in [1]) is:
Our general policy is to wait until the oldest compiler that
supports C++NN is at least 3 years old.
Rationale: We want to ensure reasonably widespread compiler
availability, to lower barrier of entry to GDB contributions, and to
make it easy for users to easily build new GDB on currently
supported stable distributions themselves. 3 years should be
sufficient for latest stable releases of distributions to include a
compiler for the standard, and/or for new compilers to appear as
easily installable optional packages. Requiring everyone to build a
compiler first before building GDB, which would happen if we
required a too-new compiler, would cause too much inconvenience.
See the policy proposal and discussion
[here](https://sourceware.org/ml/gdb-patches/2016-10/msg00616.html).
The first GCC release which with full C++17 support is GCC-9[2],
released in 2019[3], which is over 4 years ago. Clang has had C++17
support since Clang-5[4] released in 2018[5].
A discussions with many distros showed that a C++17-able compiler is
always available, meaning that this no hard requirement preventing us to
require it going forward.
[1] https://sourceware.org/gdb/wiki/Internals%20GDB-C-Coding-Standards#When_is_GDB_going_to_start_requiring_C.2B-.2B-NN_.3F
[2] https://gcc.gnu.org/projects/cxx-status.html#cxx17
[3] https://gcc.gnu.org/gcc-9/
[4] https://clang.llvm.org/cxx_status.html
[5] https://releases.llvm.org/
Change-Id: Id596f5db17ea346e8a978668825787b3a9a443fd
Reviewed-By: Eli Zaretskii <eliz@gnu.org>
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net>
Lancelot Six [Tue, 12 Sep 2023 13:13:23 +0000 (13:13 +0000)]
gdb/ax_cxx_compile_stdcxx.m4: upgrade
This patch upgrades gdb/ax_cxx_compile_stdcxx.m4 to follow changes
available in [1] and regenerates the configure script.
[1] https://www.gnu.org/software/autoconf-archive/ax_cxx_compile_stdcxx.html
Change-Id: I5b16adc65c9e48a13ad65202d58ab7a9d487214e
Approved-By: Tom Tromey <tom@tromey.com>
Approved-By: Pedro Alves <pedro@palves.net>