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This adds a new PEI target pei-riscv64-little. Only objdump and objcopy
are supported.
bfd:
* .gitignore: Add pe-riscv64igen.c.
* Makefile.am (BFD64_BACKENDS): Add pei-riscv64.lo,
pe-riscv64igen.lo.
(BFD64_BACKENDS_CFILES): Add pei-riscv64.c.
(BUILD_CFILES): Add pe-riscv64igen.c.
(pe-riscv64igen.c): New rule.
* Makefile.in: Regenerate.
* bfd.c (bfd_get_sign_extend_vma): Add pei-riscv64-little.
* coff-riscv64.c: New file.
* coffcode.h (coff_set_arch_mach_hook, coff_set_flags)
(coff_write_object_contents): Add riscv64 (riscv64_pei_vec)
support.
* config.bfd (targ_selvecs): Add riscv64_pei_vec to all riscv*
targets.
* configure.ac: Handle riscv64_pei_vec.
* configure: Regenerate.
* libpei.h (GET_OPTHDR_IMAGE_BASE, PUT_OPTHDR_IMAGE_BASE)
(GET_OPTHDR_SIZE_OF_STACK_RESERVE)
(PUT_OPTHDR_SIZE_OF_STACK_RESERVE)
(GET_OPTHDR_SIZE_OF_STACK_COMMIT, PUT_OPTHDR_SIZE_OF_STACK_COMMIT)
(GET_OPTHDR_SIZE_OF_HEAP_RESERVE, PUT_OPTHDR_SIZE_OF_HEAP_RESERVE)
(GET_OPTHDR_SIZE_OF_HEAP_COMMIT, PUT_OPTHDR_SIZE_OF_HEAP_COMMIT)
(GET_PDATA_ENTRY, _bfd_XX_bfd_copy_private_bfd_data_common)
(_bfd_XX_bfd_copy_private_section_data)
(_bfd_XX_get_symbol_info, _bfd_XX_only_swap_filehdr_out)
(_bfd_XX_print_private_bfd_data_common)
(_bfd_XXi_final_link_postscript, _bfd_XXi_only_swap_filehdr_out)
(_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out)
(_bfd_XXi_swap_aux_in, _bfd_XXi_swap_aux_out)
(_bfd_XXi_swap_lineno_in, _bfd_XXi_swap_lineno_out)
(_bfd_XXi_swap_scnhdr_out, _bfd_XXi_swap_sym_in)
(_bfd_XXi_swap_sym_out, _bfd_XXi_swap_debugdir_in)
(_bfd_XXi_swap_debugdir_out, _bfd_XXi_write_codeview_record)
(_bfd_XXi_slurp_codeview_record) [COFF_WITH_peRiscV64]: Define.
(_bfd_peRiscV64_print_ce_compressed_pdata): Declare.
* peXXigen.c (_bfd_XXi_swap_aouthdr_in, _bfd_XXi_swap_aouthdr_out)
(_bfd_XXi_swap_scnhdr_out, pe_print_pdata)
(_bfd_XX_print_private_bfd_data_common)
(_bfd_XX_bfd_copy_private_section_data)
(_bfd_XXi_final_link_postscript): Support COFF_WITH_peRiscV64.
* pei-riscv64.c: New file.
* peicode.h (coff_swap_scnhdr_in, pe_ILF_build_a_bfd)
(pe_ILF_object_p): Support COFF_WITH_peRiscV64.
(jtab): Add dummy entry that traps.
* targets.c (_bfd_target_vector): Add riscv64_pei_vec.
binutils:
* testsuite/binutils-all/riscv/pei-riscv64.d: New.
* testsuite/binutils-all/riscv/pei-riscv64.s: New.
include:
* coff/riscv64.h: New file.
* coff/pe.h (IMAGE_FILE_MACHINE_RISCV32)
(IMAGE_FILE_MACHINE_RISCV64): Define.
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This is aimed at fixing holes in two alpha-ecoff relocation functions
that access section contents without first bounds checking offsets.
I've also rewritten ALPHA_R_OP_STORE handling to support writing to
the bytes near the end of the section.
* coff-alpha.c (alpha_ecoff_get_relocated_section_contents): Don't
bother checking ALPHA_R_LITERAL insn. Range check before reading
contents for ALPHA_R_GPDISP, and simplify handling. Rewrite
ALPHA_R_OP_STORE handling. Correct error callback args.
(alpha_relocate_section): Similarly. Don't abort, report errors.
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* dwarf.c (display_debug_addr): Free dummy debug_addr_info entry.
Don't return without freeing debug_addr_info on error paths.
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In commit 7ac6d0c38c36 I made more use of free_contents in
_bfd_elf_slurp_version_tables, a variable added to tag the case where
raw verneed and verdefs have been read locally by the function, and
thus should be freed before returning. In retrospect it may have been
better to do without the extra variable entirely. It's easy to infer
when "contents" should be freed, costing a little extra on an error
path but costing less elsewhere.
* elf.c (_bfd_elf_slurp_version_tables): Don't use free_contents.
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This adds the efi target name handling for riscv64 to objcopy.
binutils:
* binutils/objcopy.c: add riscv64 handling to
convert_efi_target()
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com>
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This seems like a useful utility func that mirrors the int2float
helper, so mark it as unused rather than delete.
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Reuse the bfd/development.sh script like most other project to
determine whether the current source tree is a dev build (e.g.
git) or a release build, and disable the warnings for releases.
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This code tries to use attach_type enums as hw_phb_decode, and while
they're setup to have compatible values, the compiler doesn't like it
when the cast is missing. So cast it explicitly and then use that.
sim/ppc/hw_phb.c:322:28: error:
implicit conversion from enumeration type 'attach_type'
(aka 'enum _attach_type') to different enumeration type
'hw_phb_decode' [-Werror,-Wenum-conversion]
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Fix building with -Wmisleading-indentation.
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Don't conflate HAVE_GETRUSAGE & HAVE_SYS_RESOURCE_H. Use the latter
to include the header and nothing else. Use the former to determine
whether to use the function and nothing else. If we find a system
that doesn't follow POSIX and provides only one of these, we can
figure out how to support it then. The manual local definition is
clashing with the system ones and leading to build failures with
newer C standards.
sim/ppc/emul_netbsd.c:51:5: error: a function declaration without a
prototype is deprecated in all versions of C and is treated as a
zero-parameter prototype in C2x, conflicting with a previous
declaration [-Werror,-Wdeprecated-non-prototype]
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aarch64-elf fails the ld-aarch64/bfd-far-3.d test, due to the stubs
being emitted in a different order to that of aarch64-linux. They are
emitted in a different order due to stub names for local symbols
having the section id in the stub name. aarch64-linux-ld generates
one more section than aarch64-elf-ld. That section is .gnu.hash. So
the stub names differ and are hashed to different slots in
stub_hash_table.
Fix this by running the test with --hash-style=sysv, and adjust
expected output. I've also changed the branch over stubs emitted at
the start of a group of stubs to not care about the symbol, for all
groups not just the one that needed changing.
* ld-aarch64/bti-far-3.d: Add --hash-style=sysv. Adjust
expected output.
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In the commit:
commit 4793f551a5aa68522fd5fbbb7e8f621148f410cd
Date: Mon Nov 27 13:33:17 2023 +0000
gdb: allow use of ~ in 'save gdb-index' command
I added a test which has a directory name within the GDB command,
which then appears in the test name as I failed to give the test a
better name.
Fixed in this commit.
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'@' is a special symbol meaning 'command' in GNU texinfo.
If the GDBINIT or GDBINIT_DIR path during configuration
included an '@' character, the makeinfo command would fail,
as it interpreted the '@' in the path as a start of a command
when expanding the path in the docs.
This patch simply escapes any '@' characters in the path,
by replacing them with '@@'. This was already done for the
bugurl variable.
This was detected because the 'Jenkins' tool sometimes puts
an '@' in the workspace path.
Approved-By: Tom Tromey <tom@tromey.com>
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While working on gdb's .debug_names writer, I found a couple of small
bugs in binutils .debug_names dumping.
First, the DWARF spec (section 6.1.1.4.6 Name Table) says:
These two arrays are indexed starting at 1, [...]
I think it is clearer for binutils to follow this, particularly
because DW_IDX_parent refers to this number.
Second, I think the handling of an empty hash table is slightly wrong.
Currently the dumping code assumes there is always an array of hashes.
However, section 6.1.1.4.5 Hash Lookup Table says:
The optional hash lookup table immediately follows the list of
type signatures.
and then:
The hash lookup table is actually two separate arrays: an array of
buckets, followed immediately by an array of hashes.
My reading of this is that the hash table as a whole is optional, and
so the hashes will not exist in this case. (This also makes sense
because the hashes are not useful without the buckets anyway.)
This patch fixes both of these problems. FWIW I have some gdb patches
in progress that change gdb both to omit the hash table and to use
DW_IDX_parent.
2023-12-04 Tom Tromey <tom@tromey.com>
* dwarf.c (display_debug_names): Handle empty .debug_names hash
table. Name entries start at 1.
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Add support for jump visualization for the s390 architecture in
disassembly:
objdump -d --visualize-jumps ...
Annotate the (conditional) jump and branch relative instructions with
information required for jump visualization:
- jump: Unconditional jump / branch relative.
- condjump: Conditional jump / branch relative.
- jumpsr: Jump / branch relative to subroutine.
Unconditional jump and branch relative instructions are annotated as
jump.
Conditional jump and branch relative instructions, jump / branch
relative on count/index, and compare and jump / branch relative
instructions are annotated as condjump.
Jump and save (jas, jasl) and branch relative and save (bras, brasl)
instructions are annotated as jumpsr (jump to subroutine).
Provide instruction information required for jump visualization during
disassembly.
The instruction type is provided after determining the opcode.
For non-code it is set to dis_noninsn. Otherwise it defaults to
dis_nonbranch. No annotation is done for data reference instructions
(i.e. instruction types dis_dref and dis_dref2). Note that the
instruction type needs to be provided before printing of the
instruction, as it is used in print_address_func() to translate the
argument value into an address if it is assumed to be a PC-relative
offset. Note that this is never the case on s390, as
print_address_func() is only called with addresses and never with
offsets.
The target of the (conditional) jump and branch relative instructions
is provided during print, when the PC relative operand is decoded.
include/
* opcode/s390.h: Define opcode flags to annotate instruction
class information for jump visualization:
S390_INSTR_FLAG_CLASS_BRANCH, S390_INSTR_FLAG_CLASS_RELATIVE,
S390_INSTR_FLAG_CLASS_CONDITIONAL, and
S390_INSTR_FLAG_CLASS_SUBROUTINE.
Define opcode flags mask S390_INSTR_FLAG_CLASS_MASK for above
instruction class information.
Define helpers for common instruction class flag combinations:
S390_INSTR_FLAGS_CLASS_JUMP, S390_INSTR_FLAGS_CLASS_CONDJUMP,
and S390_INSTR_FLAGS_CLASS_JUMPSR.
opcodes/
* s390-mkopc.c: Add opcode flags to annotate information
for jump visualization: jump, condjump, and jumpsr.
* s390-opc.txt: Annotate (conditional) jump and branch relative
instructions with information for jump visualization.
* s390-dis.c (print_insn_s390, s390_print_insn_with_opcode):
Provide instruction information for jump visualization.
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Reviewed-by: Andreas Krebbel <krebbel@linux.ibm.com>
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I found a "fall-through" comment in gdb/remote.c that was incorrect --
the code here cannot in fact fall through.
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I noticed that gdbserver/win32-low.cc has a fall-through comment that
should have been converted to use the annotation instead.
This patch makes the change.
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This commit enables the early initialization commands (92e4e97a9f5) to
modify the number of threads used by gdb's thread pool.
The motivation here is to prevent gdb from spawning a detrimental number
of threads on many-core systems under environments with restrictive
ulimits.
With gdb before this commit, the thread pool takes the following sizes:
1. Thread pool size is initialized to 0.
2. After the maintenance commands are defined, the thread pool size is
set to the number of system cores (if it has not already been set).
3. Using early initialization commands, the thread pool size can be
changed using "maint set worker-threads".
4. After the first prompt, the thread pool size can be changed as in the
previous step.
Therefore after step 2. gdb has potentially launched hundreds of threads
on a many-core system.
After this change, step 2 and 3 are reversed so there is an opportunity
to set the required number of threads without needing to default to the
number of system cores first.
There does exist a configure option (added in 261b07488b9) to disable
multithreading, but this does not allow for an already deployed gdb to
be configured.
Additionally, the default number of worker threads is clamped at eight
to control the number of worker threads spawned on many-core systems.
This value was chosen as testing recorded on bugzilla issue 29959
indicates that parallel efficiency drops past this point.
GDB built with GCC 13.
No test suite regressions detected. Compilers: GCC, ACfL, Intel, Intel
LLVM, NVHPC; Platforms: x86_64, aarch64.
The scenario that interests me the most involves preventing GDB from
spawning any worker threads at all. This was tested by counting the
number of clones observed by strace:
strace -e clone,clone3 gdb/gdb -q \
--early-init-eval-command="maint set worker-threads 0" \
-ex q ./gdb/gdb |& grep --count clone
The new test relies on "gdb: install CLI uiout while processing early
init files" developed by Andrew Burgess. This patch will need pushing
prior to this change.
The clamping was tested on machines with both 16 cores and a single
core. "maint show worker-threads" correctly reported eight and one
respectively.
Approved-By: Tom Tromey <tom@tromey.com>
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The next commit wants to use a 'show' command within an early
initialisation file, despite these commands not being in the list of
acceptable commands for use within an early initialisation file.
The problem we run into is that the early initialisation files are
processed before GDB has installed the top level interpreter. The
interpreter is responsible to installing the default uiout (accessed
through current_uiout), and as a result code that depends on
uiout (e.g. 'show' commands) will end up dereferencing a nullptr, and
crashing GDB.
I did consider moving the interpreter installation before the early
initialisation, and this would work fine except for the new DAP
interpreter, which relies on having Python available during its
initialisation. Which means we can't install the interpreter until
after Python has been initialised, and the early initialisation
handling has to occur before Python is setup -- that's the whole point
of this feature (to allow customisation of how Python is setup).
So, what I propose is that early within captured_main_1, we install a
temporary cli_ui_out as the current_uiout. This will remain in place
until the top-level interpreter is installed, at which point the
temporary will be replaced.
What this means is that current_uiout will no longer be nullptr,
instead, any commands within an early initialisation file that trigger
output, will perform that output in a CLI style.
I propose that we don't update the documentation for early
initialisation files, we leave the user advice as being only 'set' and
'source' commands are acceptable. But now, if a user does try a
'show' command, then instead of crashing, GDB will do something
predictable.
I've not added a test in this commit. The next commit relies on this
patch and will serve as a test.
Tested-By: Richard Bunt <richard.bunt@linaro.org>
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I noticed that after resizing to a narrow window, I got:
...
┌────────────────┐
│ │
│[ No Source Avail
able ] │
│ │
└────────────────┘
...
Fix this by adding two new functions:
- tui_win_info::display_string (int y, int x, const char *str)
- tui_win_info::display_string (const char *str)
that make sure that borders are not overwritten, which get us instead:
...
┌────────────────┐
│ │
│[ No Source Avai│
│ │
│ │
└────────────────┘
...
Tested on x86_64-linux.
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When using GDB on native linux, it can happen that, while attempting
to detach an inferior, the inferior may have been exited or have been
killed, yet still be in the list of lwps. Should that happen, the
assert in x86_linux_update_debug_registers in
gdb/nat/x86-linux-dregs.c will trigger. The line in question looks
like this:
gdb_assert (lwp_is_stopped (lwp));
For this case, the lwp isn't stopped - it's dead.
The bug which brought this problem to my attention is one in which the
pwntools library uses GDB to to debug a process; as the script is
shutting things down, it kills the process that GDB is debugging and
also sends GDB a SIGTERM signal, which causes GDB to detach all
inferiors prior to exiting. Here's a link to the bug:
https://bugzilla.redhat.com/show_bug.cgi?id=2192169
The following shell command mimics part of what the pwntools
reproducer script does (with regard to shutting things down), but
reproduces the bug much less reliably. I have found it necessary to
run the command a bunch of times before seeing the bug. (I usually
see it within 5-10 repetitions.) If you choose to try this command,
make sure that you have no running "cat" or "gdb" processes first!
cat </dev/zero >/dev/null & \
(sleep 5; (kill -KILL `pgrep cat` & kill -TERM `pgrep gdb`)) & \
sleep 1 ; \
gdb -q -iex 'set debuginfod enabled off' -ex 'set height 0' \
-ex c /usr/bin/cat `pgrep cat`
So, basically, the idea here is to kill both gdb and cat at roughly
the same time. If we happen to attempt the detach before the process
lwp has been deleted from GDB's (linux native) LWP data structures,
then the assert will trigger. The relevant part of the backtrace
looks like this:
#8 0x00000000008a83ae in x86_linux_update_debug_registers (lwp=0x1873280)
at gdb/nat/x86-linux-dregs.c:146
#9 0x00000000008a862f in x86_linux_prepare_to_resume (lwp=0x1873280)
at gdb/nat/x86-linux.c:81
#10 0x000000000048ea42 in x86_linux_nat_target::low_prepare_to_resume (
this=0x121eee0 <the_amd64_linux_nat_target>, lwp=0x1873280)
at gdb/x86-linux-nat.h:70
#11 0x000000000081a452 in detach_one_lwp (lp=0x1873280, signo_p=0x7fff8ca3441c)
at gdb/linux-nat.c:1374
#12 0x000000000081a85f in linux_nat_target::detach (
this=0x121eee0 <the_amd64_linux_nat_target>, inf=0x16e8f70, from_tty=0)
at gdb/linux-nat.c:1450
#13 0x000000000083a23b in thread_db_target::detach (
this=0x1206ae0 <the_thread_db_target>, inf=0x16e8f70, from_tty=0)
at gdb/linux-thread-db.c:1385
#14 0x0000000000a66722 in target_detach (inf=0x16e8f70, from_tty=0)
at gdb/target.c:2526
#15 0x0000000000a8f0ad in kill_or_detach (inf=0x16e8f70, from_tty=0)
at gdb/top.c:1659
#16 0x0000000000a8f4fa in quit_force (exit_arg=0x0, from_tty=0)
at gdb/top.c:1762
#17 0x000000000070829c in async_sigterm_handler (arg=0x0)
at gdb/event-top.c:1141
My colleague, Andrew Burgess, has done some recent work on other
problems with detach. Upon hearing of this problem, he came up a test
case which reliably reproduces the problem and tests for a few other
problems as well. In addition to testing detach when the inferior has
terminated due to a signal, it also tests detach when the inferior has
exited normally. Andrew observed that the linux-native-only
"checkpoint" command would be affected too, so the test also tests
those cases when there's an active checkpoint.
For the LWP exit / termination case with no checkpoint, that's handled
via newly added checks of the waitstatus in detach_one_lwp in
linux-nat.c.
For the checkpoint detach problem, I chose to pass the lwp_info
to linux_fork_detach in linux-fork.c. With that in place, suitable
tests were added before attempting a PTRACE_DETACH operation.
I added a few asserts at the beginning of linux_fork_detach and
modified the caller code so that the newly added asserts shouldn't
trigger. (That's what the 'pid == inferior_ptid.pid' check is about
in gdb/linux-nat.c.)
Lastly, I'll note that the checkpoint code needs some work with regard
to background execution. This patch doesn't attempt to fix that
problem, but it doesn't make it any worse. It does slightly improve
the situation with detach because, due to the check noted above,
linux_fork_detach() won't be called for the wrong inferior when there
are multiple inferiors. (There are at least two other problems with
the checkpoint code when there are multiple inferiors. See:
https://sourceware.org/bugzilla/show_bug.cgi?id=31065)
This commit also adds a new test,
gdb.base/process-dies-while-detaching.exp. Andrew Burgess is the
primary author of this test case. Its design is similar to that of
gdb.threads/main-thread-exit-during-detach.exp, which was also written
by Andrew.
This test checks that GDB correctly handles several cases that can
occur when GDB attempts to detach an inferior process. The process
can exit or be terminated (e.g. via SIGKILL) prior to GDB's event
loop getting a chance to remove it from GDB's internal data
structures. To complicate things even more, detach works differently
when a checkpoint (created via GDB's "checkpoint" command) exists for
the inferior. This test checks all four possibilities: process exit
with no checkpoint, process termination with no checkpoint, process
exit with a checkpoint, and process termination with a checkpoint.
Co-Authored-By: Andrew Burgess <aburgess@redhat.com>
Approved-By: Andrew Burgess <aburgess@redhat.com>
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Fix a --set-sect-name typo in the description of objcopy
--rename-section.
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commit eab996435fe65a421541f59557c5f1fd427573a3
Author: Jan Beulich <jbeulich@suse.com>
Date: Tue Nov 7 13:58:32 2023 +0100
ld/x86: reduce testsuite dependency on system object files
changed some C compiler tests to assembler/linker tests which introduced
2 problems:
1. It broke x32 binutils tests since --64 was passed to assembler, but
-m elf_x86_64 wasn't passed to linker.
2. -nostdlib was passed to C compiler driver to exclude standard run-time
files which should be avoided with -r option for linker tests.
Fix them by passing -m elf_x86_64 to linker and removing -nostdlib for
linker tests with -r.
PR ld/30722
* testsuite/ld-x86-64/x86-64.exp: Pass -m elf_x86_64 to linker
for tests with --64. Remove -nostdlib for tests with -r.
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On Linux, threads are treated much like separate processes by the
kernel. In particular, it's possible to ptrace just a single thread.
If gdb tries to attach to a multi-threaded inferior, where a non-main
thread is already being traced (e.g., by strace), then gdb will get
into an infinite loop attempting to attach.
This patch fixes this problem by having the attach fail if ptrace
fails to attach to any thread of the inferior.
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This changes linux_proc_attach_tgid_threads to use gdb_dir_up. This
makes it robust against exceptions.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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linux_proc_attach_tgid_threads computes a file name, and then
re-computes it for a warning. It is better to reuse the
already-computed name here.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
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aarch64-linux-tdep.c
Fix two spots in aarch64-linux-tdep.c that build regcache_map_entry
arrays without a null terminator. The null terminators are needed for
regcache::transfer_regset and regcache_map_entry_size to work properly.
Change-Id: I3224a314e1360b319438f32de8c81e70ab42e105
Reviewed-By: John Baldwin <jhb@FreeBSD.org>
Approved-By: Luis Machado <luis.machado@arm.com>
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regcache::transfer_regset iterates over an array of regcache_map_entry,
transferring the registers (between regcache and buffer) described by
those entries. It stops either when it reaches the end of the
regcache_map_entry array (marked by a null entry) or (it seems like the
intent is) when it reaches the end of the buffer (in which case not all
described registers are transferred).
I said "seems like the intent is", because there appears to be a small
bug. transfer_regset is made of two loops:
foreach regcache_map_entry:
foreach register described by the regcache_map_entry:
if the register doesn't fit in the remainder of the buffer:
break
transfer register
When stopping because we have reached the end of the buffer, the break
only breaks out of the inner loop.
This problem causes some failures when I run tests such as
gdb.arch/aarch64-sme-core-3.exp (on AArch64 Linux, in qemu). This is
partly due to aarch64_linux_iterate_over_regset_sections failing to add
a null terminator in its regcache_map_entry array, but I think there is
still a problem in transfer_regset.
The sequence to the crash is:
- The `regcache_map_entry za_regmap` object built in
aarch64_linux_iterate_over_regset_sections does not have a null
terminator.
- When the target does not have a ZA register,
aarch64_linux_collect_za_regset calls `regcache->collect_regset` with
a size of 0 (it's actually pointless, but still it should work).
- transfer_regset gets called with a buffer size of 0.
- transfer_regset detects that the register to transfer wouldn't fit in
0 bytes, so it breaks out of the inner loop.
- The outer loop tries to go read the next regcache_map_entry, but
there isn't one, and we start reading garbage.
Obviously, this would get fixed by making
aarch64_linux_iterate_over_regset_sections use a null terminator (which
is what the following patch does). But I think that when detecting that
there is not enough buffer left for the current register,
transfer_regset should return, not only break out of the inner loop.
This is a kind of contrived scenario, but imagine we have these two
regcache_map_entry objects:
- 2 registers of 8 bytes
- 2 registers of 4 bytes
For some reason, the caller passes a buffer of 12 bytes.
transfer_regset will detect that the second 8 byte register does not
fit, and break out of the inner loop. However, it will then go try the
next regcache_map_entry. It will see that it can fit one 4 byte
register in the remaining buffer space, and transfer it from/to there.
This is very likely not an expected behavior, we wouldn't expect to
read/write this sequence of registers from/to the buffer.
In this example, whether passing a 12 bytes buffer makes sense or
whether it is a size computation bug in the caller, we don't know, but I
think that exiting as soon as a register doesn't fit is the sane thing
to do.
Change-Id: Ia349627d2e5d281822ade92a8e7a4dea4f839e07
Reviewed-By: John Baldwin <jhb@FreeBSD.org>
Reviewed-By: Luis Machado <luis.machado@arm.com>
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I noticed that the interpreters node in the docs links to the DAP
protocol docs, but I thought the DAP node ought to as well. This
patch adds a bit of introductory text there.
Approved-By: Eli Zaretskii <eliz@gnu.org>
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If the value to be shifted has the sign bit set, the sign
bit would get copied into bits 32..63 of the temporary. Those
would then be right shifted into the final value giving an
incorrect final result.
This was observed with upcoming GCC improvements which eliminate
unnecessary extensions.
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The commit a3da2e7e550c4fe79128b5e532dbb90df4d4f418 has introduced
regressions when testing using the READ1 mechanism. The reason for that
is the new failure path in proc test_gdb_complete_tab_unique, which
looks for GDB suggesting more than what the test inputted, but not the
correct answer, followed by a white space. Consider the following case:
int foo(int bar, int baz);
Sending the command "break foo<tab>" to GDB will return
break foo(int, int)
which easily fits the buffer in normal testing, so everything works, but
when reading one character at a time, the test will find the partial
"break foo(int, " and assume that there was a mistake, so we get a
spurious FAIL.
That change was added because we wanted to avoid forcing a completion
failure to fail through timeout, which it had to do because there is no
way to verify that the output is done, mostly because when I was trying
to solve a different problem I kept getting reading errors and testing
completion was frustrating.
This commit implements a better way to avoid that frustration, by first
testing gdb's complete command and only if that passes we will test tab
completion. The difference is that when testing with the complete
command, we can tell when the output is over when we receive the GDB
prompt again, so we don't need to rely on timeouts. With this, the
change to test_gdb_complete_tab_unique has been removed as that test
will only be run and fail in the very unlikely scenario that tab
completion is different than command completion.
Approved-By: Andrew Burgess <aburgess@redhat.com>
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This is a patch to simplify the pd_activate () in aix-thread.c incase of a failure to start a thread session
, since pd_activate () now has return type void.
Also this patch fixes the shadow declarartion warning in sync-threadlists.
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PR 31105
* nm.c (main): Remove spurious colon after U in the call to getopt_long
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Makeinfo 4.12 is unhappy about the new "Special Sections" without that
also having a @chapter line.
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Yet once again: Old enough glibc has an (unguarded) declaration of
index() in string.h, which triggers a "shadows a global declaration"
warning with at least some gcc versions.
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user_stuff, dot, and lineno_list_{head,tail} have no users (left), while
bfd_section was only ever written.
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Just like avoiding to do certain transformations potentially affected by
stand-alone prefixes or direct data emission, also avoid emitting
optimized NOPs right afterwards; insert a plain old NOP first in such
cases.
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Warning without knowing what's going to follow isn't useful, the more
that appropriate warnings are emitted elsewhere in all cases. Not
updating state (file/line in particular) also isn't helpful, as it's
always the last directive ahead of a construct potentially needing
fiddling with that's "guilty" in that fiddling being suppressed.
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.nop and .nops generate code, not data. Hence them invoking
md_cons_align() is at best inappropriate. In fact it actually gets in
the of x86'es state maintenance involving i386_cons_align().
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Just like avoiding to do other transformations potentially affected by
stand-alone prefixes or direct data emission, also avoid optimization
on the following insn.
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Otherwise intermediate section switches result in inconsistent behavior.
Note, however, that intermediate sub-section switches will continue to
result in inconsistent or even inappropriate behavior.
While there also add recording of state to s_insn().
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... as MSR index specifier: It is unreasonable to demand that people
write less readable / understandable code, just because the present
documentation mentions only Reg64. Whether to also adjust the
disassembler is a separate question, perhaps indeed more tightly tied
to what the spec says.
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Fix these two warnings, when building on macos:
CXX cp-name-parser.o
/Users/smarchi/src/binutils-gdb/gdb/cp-name-parser.y:1644:7: error: fallthrough annotation does not directly precede switch label
[[fallthrough]];
^
CXX dbxread.o
/Users/smarchi/src/binutils-gdb/gdb/dbxread.c:2809:7: error: fallthrough annotation does not directly precede switch label
[[fallthrough]];
^
In these two cases, we [[fallthrough]], followed by a regular label,
followed by a case label. Move the [[fallthrough]] below the regular
label.
Change-Id: If4a3145139e050bdb6950c7f239badd5778e6f64
Approved-By: Tom Tromey <tom@tromey.com>
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