Andreas Arnez [Wed, 17 Nov 2021 10:46:36 +0000 (11:46 +0100)]
[gdb/build, s390x] Fix build after gdbarch_tdep changes
Commit 345bd07cce33 ("gdb: fix gdbarch_tdep ODR violation") changes a
declaration in s390-tdep.h from
struct gdbarch_tdep { ... };
to
struct s390_gdbarch_tdep : gdbarch_tdep { ... };
and now requires that gdbarch_tdep has been declared before. Which is
usually the case, except when compiling s390-linux-nat.c, where
s390-tdep.h is included before gdbarch.h. Thus the s390x build errors out
with the compiler complaining about a missing class name after the colon.
Fix this in s390-linux-nat.c, by including gdbarch.h before s390-tdep.h.
Nelson Chu [Wed, 17 Nov 2021 10:46:11 +0000 (18:46 +0800)]
RISC-V: Support rvv extension with released version 1.0.
2021-11-17 Jim Wilson <jimw@sifive.com>
Kito Cheng <kito.cheng@sifive.com>
Nelson Chu <nelson.chu@sifive.com>
This patch is porting from the following riscv github,
https://github.com/riscv/riscv-binutils-gdb/tree/rvv-1.0.x
And here is the vector spec,
https://github.com/riscv/riscv-v-spec
bfd/
* elfxx-riscv.c (riscv_implicit_subsets): Added imply rules
of v, zve and zvl extensions.
(riscv_supported_std_ext): Updated verison of v to 1.0.
(riscv_supported_std_z_ext): Added zve and zvl extensions.
(riscv_parse_check_conflicts): The zvl extensions need to
enable either v or zve extension.
(riscv_multi_subset_supports): Check the subset list to know
if the INSN_CLASS_V and INSN_CLASS_ZVEF instructions are supported.
gas/
* config/tc-riscv.c (enum riscv_csr_class): Added CSR_CLASS_V.
(enum reg_class): Added RCLASS_VECR and RCLASS_VECM.
(validate_riscv_insn): Check whether the rvv operands are valid.
(md_begin): Initialize register hash for rvv registers.
(macro_build): Added rvv operands when expanding rvv pseudoes.
(vector_macro): Expand rvv macros into one or more instructions.
(macro): Likewise.
(my_getVsetvliExpression): Similar to my_getVsetvliExpression,
but used for parsing vsetvli operands.
(riscv_ip): Parse and encode rvv operands. Besides, The rvv loads
and stores with EEW 64 cannot be used when zve32x is enabled.
* testsuite/gas/riscv/priv-reg-fail-version-1p10.d: Updated -march
to rv32ifv_zkr.
* testsuite/gas/riscv/priv-reg-fail-version-1p11.d: Likewise.
* testsuite/gas/riscv/priv-reg-fail-version-1p9p1.d: Likewise.
* testsuite/gas/riscv/priv-reg.s: Added rvv csr testcases.
* testsuite/gas/riscv/priv-reg-version-1p10.d: Likewise.
* testsuite/gas/riscv/priv-reg-version-1p11.d: Likewise.
* testsuite/gas/riscv/priv-reg-version-1p9p1.d: Likewise.
* testsuite/gas/riscv/march-imply-v.d: New testcase.
* testsuite/gas/riscv/vector-insns-fail-zve32xf.d: Likewise.
* testsuite/gas/riscv/vector-insns-fail-zve32xf.l: Likewise.
* testsuite/gas/riscv/vector-insns-fail-zvl.d: Likewise.
* testsuite/gas/riscv/vector-insns-fail-zvl.l: Likewise.
* testsuite/gas/riscv/vector-insns-vmsgtvx.d: Likewise.
* testsuite/gas/riscv/vector-insns-vmsgtvx.s: Likewise.
* testsuite/gas/riscv/vector-insns-zero-imm.d: Likewise.
* testsuite/gas/riscv/vector-insns-zero-imm.s: Likewise.
* testsuite/gas/riscv/vector-insns.d: Likewise.
* testsuite/gas/riscv/vector-insns.s: Likewise.
include/
* opcode/riscv-opc.h: Defined mask/match encodings and csrs for rvv.
* opcode/riscv.h: Defined rvv immediate encodings and fields.
(enum riscv_insn_class): Added INSN_CLASS_V and INSN_CLASS_ZVEF.
(INSN_V_EEW64): Defined.
(M_VMSGE, M_VMSGEU): Added for the rvv pseudoes.
opcodes/
* riscv-dis.c (print_insn_args): Dump the rvv operands.
* riscv-opc.c (riscv_vecr_names_numeric): Defined rvv registers.
(riscv_vecm_names_numeric): Likewise.
(riscv_vsew): Likewise.
(riscv_vlmul): Likewise.
(riscv_vta): Likewise.
(riscv_vma): Likewise.
(match_vs1_eq_vs2): Added for rvv Vu operand.
(match_vd_eq_vs1_eq_vs2): Added for rvv Vv operand.
(riscv_opcodes): Added rvv v1.0 instructions.
gdb/nat/linux-osdata.c: fix build on gcc-12 (string overfow)
On gcc-12 build fails as:
../../gdbserver/../gdb/nat/linux-osdata.c: In function 'void linux_xfer_osdata_processes(buffer*)':
../../gdbserver/../gdb/nat/linux-osdata.c:330:39: error:
'__builtin___sprintf_chk' may write a terminating nul past the end of the destination [-Werror=format-overflow=]
330 | sprintf (core_str, "%d", i);
| ^
It's an off-by-one case in an infeasible scenario for negative
huge core count. The change switches to std::string for memory
handling.
Tested by running 'info os processes' and checking CPU cores column.
Mike Frysinger [Wed, 17 Nov 2021 01:16:18 +0000 (20:16 -0500)]
sim: cris: replace @srcdir@ test extension with $srcdir/$subdir
The common framework supports $srcdir & $subdir replacements already,
so replace the custom @srcdir@ logic with those. Since the replace
happens in slurp_options that cris already uses, we don't have any
logic to port over there. We have to duplicate that into the cris
slurp_rv helper though.
Mike Frysinger [Wed, 17 Nov 2021 00:40:00 +0000 (19:40 -0500)]
sim: cris: drop custom "dynamic" test field
This tag is used to force tests to be built dynamically (i.e. without
-static linking). This is because cris-sim.exp in dejagnu turns on
static linking in ldflags.
The default configs and runtest flags shouldn't load these boards.
If these settings are still needed, we should figure out a different
way of suppressing the stock settings wholesale. We want these to
all pass out of the box with little to no configuration so that they
can run in a multitarget build.
With dropping "dynamic", it'll be easier to merge the custom cris
test logic with the common sim test logic.
sim/cr16/interp.c: In function 'lookup_hash':
sim/cr16/interp.c:89:25: error:
the comparison will always evaluate as 'true'
for the address of 'mnimonic' will never be NULL [-Werror=address]
89 | if ((h->ops->mnimonic != NULL) &&
| ^~
'mnimonic' is a sharr array within ops. It can never be NULL.
Simon Marchi [Mon, 8 Nov 2021 21:06:06 +0000 (16:06 -0500)]
gdb: fix length of array view returned by some value_contents functions
In commit 50888e42dcd3 ("gdb: change functions returning value contents
to use gdb::array_view"), I believe I made a mistake with the length of
the array views returned by some functions. All functions return a view
of `TYPE_LENGTH (value_type (type))` length. This is not correct when
the value's enclosing type is larger than the value's type. In that
case, the value's contents buffer is of the size of the enclosing type,
and the value's actual contents is a slice of that (as returned by
value_contents). So, functions value_contents_all_raw,
value_contents_for_printing and value_contents_for_printing_const are
not correct. Since they are meant to return the value's contents buffer
as a whole, they should have the size of the enclosing type.
There is nothing that uses the returned array view size at the moment,
so this didn't cause a problem. But it became apparent when trying to
adjust some callers.
Also, in C++11, __func__ expands to the demangled function name, so the
mention in the comment above FUNCTION_NAME doesn't apply anymore.
Finally, in places where FUNCTION_NAME is used, I think it's enough to
print the function name, no need to print the whole signature.
Therefore, I propose to just remove FUNCTION_NAME and update users to
use the standard __func__.
Andrew Burgess [Mon, 8 Nov 2021 15:17:16 +0000 (15:17 +0000)]
gdbsupport: move xfree into its own file
In the next commit I'd like to reference gdb_unique_ptr within the
common-utils.h file. However, this requires that I include
gdb_unique_ptr.h, which requires that xfree be defined.
Interestingly, gdb_unique_ptr.h doesn't actually include anything that
defines xfree, but I was finding that when I added a gdb_unique_ptr.h
include to common-utils.h I was getting a dependency cycle; before my
change xfree was defined when gdb_unique_ptr.h was processed, while
after my change it was not, and this made g++ unhappy.
To break this cycle, I propose to move xfree into its own header file,
gdb-xfree.h, which I'll then include into gdb_unique_ptr.h and
common-utils.cc.
In frame.c:unwind_pc, stack.c:info_frame_command_core, and
value.c:value_optimized_out, but if we are hitting these cases then
it's not significantly changing GDB's behaviour.
Tom Tromey [Tue, 16 Nov 2021 16:11:41 +0000 (09:11 -0700)]
Remove config.cache in gdbserver's "distclean"
PR gdb/28586 points out that "make distclean" fails to delete
config.cache from gdbserver/. This patch fixes the bug, and removes a
duplicate "Makefile" deletion that was also pointed out in the PR.
Tom de Vries [Tue, 16 Nov 2021 15:46:43 +0000 (16:46 +0100)]
[gdb/testsuite] Remove inferior output in gdb.base/foll-vfork.exp
Test-case gdb.base/foll-vfork.exp has inferior output that is not needed, but
which makes the regexp matching more difficult (see commit 1f28b70def1
"[gdb/testsuite] Fix regexp in gdb.base/foll-vfork.exp").
Remove the inferior output, and revert commit 1f28b70def1 to make the matching
more restrictive.
Mike Frysinger [Tue, 16 Nov 2021 05:03:50 +0000 (00:03 -0500)]
sim: syscall: fix argvlen & argv implementation
Now that we have access to the argv & envp strings, finish implementing
these syscalls. Delete unused variables, fix tbuf by incrementing the
pointer instead of setting to the length, and make sure we don't write
more data than the bufsize says is available.
Mike Frysinger [Tue, 16 Nov 2021 04:00:04 +0000 (23:00 -0500)]
sim: keep track of program environment strings
We've been passing the environment strings to sim_create_inferior,
but most ports don't do anything with them. A few will use ad-hoc
logic to stuff the stack for user-mode programs, but that's it.
Let's formalize this across the board by storing the strings in the
normal sim state. This will allow (in future commits) supporting
more functionality in the run interface, and to unify some of the
libgloss syscalls.
jiawei [Mon, 15 Nov 2021 03:03:43 +0000 (11:03 +0800)]
RISC-V: Scalar crypto instruction and entropy source CSR testcases.
Add testcases for Scalar Crypto extension, with total testcase contain all
instructions in k-ext/k-ext-64 and sub-extension testcase for zbk* zk*. Also
add testcase for new CSR name 'seed' which is the Entropy Source in zkr.
In fact these whole testcases can be combined into one file, after we have
supported the .option arch +-= directives.
jiawei [Mon, 15 Nov 2021 03:03:42 +0000 (11:03 +0800)]
RISC-V: Scalar crypto instructions and operand set.
Add instructions in k-ext, some instruction in zbkb, zbkc is reuse from
zbb,zbc, we just change the class attribute to make them both support.
The 'aes64ks1i' and 'aes64ks2' instructions are present in both the Zknd
and Zkne extensions on rv64. Add new operand letter 'y' to present 'bs'
symbol and 'Y' to present 'rnum' symbolc for zkn instructions. Also add
a new Entropy Source CSR define 'seed' located at address 0x015.
bfd/
* elfxx-riscv.c (riscv_multi_subset_supports): Added support for
crypto extension.
gas/
*config/tc-riscv.c (enum riscv_csr_class): Added CSR_CLASS_ZKR.
(riscv_csr_address): Checked for CSR_CLASS_ZKR.
(validate_riscv_insn): Added y and Y for bs and rnum operands.
(riscv_ip): Handle y and Y operands.
include/
* opcode/riscv-opc.h: Added encodings of crypto instructions.
Also defined new csr seed, which address is 0x15.
* opcode/riscv.h: Defined OP_* and INSN_CLASS_* for crypto.
opcodes/
* riscv-dis.c (print_insn_args): Recognized new y and Y operands.
* riscv-opc.c (riscv_opcodes): Added crypto instructions.
jiawei [Mon, 15 Nov 2021 03:03:41 +0000 (11:03 +0800)]
RISC-V: Minimal support of scalar crypto extension.
Minimal support of scalar crypto extension, add "k" in the
riscv_supported_std_ext, to make the order check right with
"zk" behind "zb".
bfd/
* elfxx-riscv.c (riscv_implicit_subsets): Added implicit
rules for zk* extensions.
(riscv_supported_std_ext): Added entry for k.
(riscv_supported_std_z_ext): Added entries for zk*.
Simon Marchi [Tue, 2 Nov 2021 16:21:31 +0000 (12:21 -0400)]
gdb: rework "set debuginfod" commands
As discussed here [1], do some re-work in the "set debuginfod commands".
First, use "set debuginfod enabled on/off/ask" instead of "set
debuginfod on/off/ask". This is more MI-friendly, and it gives an
output that makes more sense in "info set", for example.
Then, make the show commands not call "error" when debuginfod support is
not compiled in. This makes the commands "show" and "show debuginfod"
stop early, breaking gdb.base/default.exp:
Running /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.base/default.exp ...
FAIL: gdb.base/default.exp: info set
FAIL: gdb.base/default.exp: show
- Make the "debuginfod enabled" setting default to "off" when debuginfod
support is not compiled in, and "ask" otherwise.
- Make the setter of "debuginfod enabled" error out when debuginfod
support is not compiled in, so that "debuginfod enabled" will always
remain "off" in that case.
- Make the setter of "debuginfod verbose" work in any case. I don't
see the harm in letting the user change that setting, since the user will
hit an error if they try to enable the use of debuginfod.
- I would do the same for the "debuginfod urls" setter, but because
this one needs to see the DEBUGINFOD_URLS_ENV_VAR macro, provided by
libdebuginfod, I made that one error out as well if debuginfod
support is not compiled it (otherwise, I would have left it like
"debuginfod verbose". Alternatively, we could hard-code
"DEBUGINFOD_URLS" in the code (in fact, it was prior to this patch,
but I think it was an oversight, as other spots use
DEBUGINFOD_URLS_ENV_VAR), or use a dummy string to store the setting,
but I don't really see the value in that.
Rename debuginfod_enable to debuginfod_enabled, just so it matches the
setting name.
Simon Marchi [Mon, 15 Nov 2021 20:22:34 +0000 (15:22 -0500)]
gdb: adjust gdbarch_tdep calls in nat files
Commit 345bd07cce33 ("gdb: fix gdbarch_tdep ODR violation") forgot to
update the gdbarch_tdep calls in the native files other than x86-64
Linux. This patch updates them all (to the best of my knowledge).
These are the files I was able to build-test:
Jim Wilson [Tue, 16 Nov 2021 00:51:05 +0000 (16:51 -0800)]
Update my email address.
I've left SiFive and have a new gmail account because it is convenient
to use with git send-email. I'm planning to use this for my RISC-V
work. My tuliptree address still works, it just isn't as convenient.
binutils:
* MAINTAINERS (RISC-V): Update my address.
Tom de Vries [Mon, 15 Nov 2021 21:55:02 +0000 (22:55 +0100)]
[gdb] Don't use gdb_stdlog for inferior-events
The test-case gdb.base/foll-vfork.exp contains:
...
if [gdb_debug_enabled] {
untested "debug is enabled"
return 0
}
...
To understand what it does, I disabled this bit and ran with GDB_DEBUG=infrun,
like so:
...
$ cd $build/gdb/testsuite
$ make check GDB_DEBUG=infrun RUNTESTFLAGS=gdb.base/foll-vfork.exp
...
and ran into:
...
(gdb) PASS: gdb.base/foll-vfork.exp: exec: \
vfork parent follow, through step: set follow-fork parent
next^M
33 if (pid == 0) {^M
(gdb) FAIL: gdb.base/foll-vfork.exp: exec: \
vfork parent follow, through step: step
...
The problem is that the test-case expects:
...
(gdb) PASS: gdb.base/foll-vfork.exp: exec: \
vfork parent follow, through step: set follow-fork parent
next^M
[Detaching after vfork from child process 28169]^M
33 if (pid == 0) {^M
(gdb) PASS: gdb.base/foll-vfork.exp: exec: \
vfork parent follow, through step: step
...
but the "Detaching" line has been redirected to
$outputs/gdb.base/foll-vfork/gdb.debug.
I looked at the documentation of "set logging debugredirect [on|off]":
...
By default, GDB debug output will go to both the terminal and the logfile.
Set debugredirect if you want debug output to go only to the log file.
...
and my interpretation of it was that "debug output" did not match the
"messages" description of inferior-events:
...
The set print inferior-events command allows you to enable or disable printing
of messages when GDB notices that new inferiors have started or that inferiors
have exited or have been detached.
...
Fix the discrepancy by not using gdb_stdlog for inferior-events.
Update the gdb.base/foll-vfork.exp test-case to not require
gdb_debug_enabled == 0.
Tested on x86_64-linux.
Tested test-case gdb.base/foll-vfork.exp with and without GDB_DEBUG=infrun.
Roland McGrath [Mon, 15 Nov 2021 19:09:17 +0000 (11:09 -0800)]
ld: Fix testsuite failures under --enable-textrel-check=error
ld/
* testsuite/ld-aarch64/dt_textrel.d: Pass explicit -z notext in
case ld was configured with --enable-textrel-check=error.
* testsuite/ld-aarch64/pr22764.d: Likewise.
* testsuite/ld-aarch64/pr20402.d: Likewise.
Simon Marchi [Mon, 15 Nov 2021 16:29:39 +0000 (11:29 -0500)]
gdb: fix gdbarch_tdep ODR violation
I would like to be able to use non-trivial types in gdbarch_tdep types.
This is not possible at the moment (in theory), because of the one
definition rule.
To allow it, rename all gdbarch_tdep types to <arch>_gdbarch_tdep, and
make them inherit from a gdbarch_tdep base class. The inheritance is
necessary to be able to pass pointers to all these <arch>_gdbarch_tdep
objects to gdbarch_alloc, which takes a pointer to gdbarch_tdep.
These objects are never deleted through a base class pointer, so I
didn't include a virtual destructor. In the future, if gdbarch objects
deletable, I could imagine that the gdbarch_tdep objects could become
owned by the gdbarch objects, and then it would become useful to have a
virtual destructor (so that the gdbarch object can delete the owned
gdbarch_tdep object). But that's not necessary right now.
It turns out that RISC-V already has a gdbarch_tdep that is
non-default-constructible, so that provides a good motivation for this
change.
Most changes are fairly straightforward, mostly needing to add some
casts all over the place. There is however the xtensa architecture,
doing its own little weird thing to define its gdbarch_tdep. I did my
best to adapt it, but I can't test those changes.
Clément Chigot [Mon, 15 Nov 2021 09:37:36 +0000 (10:37 +0100)]
COFF: avoid modifications over C_FILE filename aux entries.
Commit e86fc4a5bc37 ("PR 28447: implement multiple parameters for .file
on XCOFF") introduces C_FILE entries which can store additional
information.
However, some modifications are needed by them but not by the original
C_FILE entries, usually representing the filename.
This patch ensures that filename entries are kept as is, in order to
protect targets not supporting the additional entries.
Eric Botcazou [Mon, 15 Nov 2021 11:50:51 +0000 (12:50 +0100)]
Deal with full path in .file 0 directive
Gas uses the directory part, if present, of the .file 0 directive to set
entry 0 of the directory table in DWARF 5, which represents the "current
directory".
Now Gas also uses the file part of the same directive to set entry 0 of the
file table, which represents the "current compilation file". But the latter
need not be located in the former so GCC will use a full path in the file
part when it is passed a full path:
gcc -c /full/path/test.c -save-temps
yields:
.file 0 "/current/directory" "/full/path/test.c"
in the assembly file and:
The Directory Table (offset 0x22, lines 2, columns 1):
Entry Name
0 (indirect line string, offset: 0x25): /current/directory
1 (indirect line string, offset: 0x38): /full/path
The File Name Table (offset 0x30, lines 2, columns 2):
Entry Dir Name
0 0 (indirect line string, offset: 0x43): /full/path/test.c
in the object file. Note the full path and the questionable Dir value in
the 0 entry of the file table.
Mike Frysinger [Mon, 15 Nov 2021 08:34:36 +0000 (03:34 -0500)]
sim: cris: make error message test a little more flexible
The point of this test is to just make sure the usage text is shown,
not the exact details of the usage text. So shorten the output test
to match the beginning. This fixes breakage when the output changed
slightly to include [--].
Mike Frysinger [Mon, 15 Nov 2021 08:32:26 +0000 (03:32 -0500)]
sim: run: fix crash in argc==0 error situation
The new argv processing code assumed that we were always passed a
command line. If we weren't, make sure we don't crash before we
get a chance to output an error message about incorrect usage.
Mike Frysinger [Mon, 15 Nov 2021 07:44:30 +0000 (02:44 -0500)]
sim: cris: replace custom "dest" test field with new --argv0
The #dest field used in the cris testsuite is a bit of hack to set the
argv[0] for the tests to read out later on. Now that the sim has an
option to set argv[0] explicitly, we don't need this custom field, so
let's drop it to harmonize the testsuites a little.
Mike Frysinger [Mon, 15 Nov 2021 07:36:29 +0000 (02:36 -0500)]
sim: run: add --argv0 option to control argv[0]
We default argv[0] to the program we run which is a standard *NIX
convention, but sometimes we want to be able to control the argv[0]
setting independently (especially for programs that inspect argv[0]
to change their behavior or output). Add an option to control it.
Mike Frysinger [Mon, 15 Nov 2021 07:32:06 +0000 (02:32 -0500)]
sim: split program path out of argv vector
We use the program argv to both find the program to run (argv[0]) and
to hold the arguments to the program. Most of the time this is fine,
but if we want to let programs specify argv[0] independently (which is
possible in standard *NIX programs), this double duty doesn't work.
So let's split the path to the program to run out into a separate
field by itself. This simplifies the various sim_open funcs too.
By itself, this code is more of a logical cleanup than something that
is super useful. But it will open up customization of argv[0] in a
follow up commit. Split the changes to make it easier to review.
Mike Frysinger [Sun, 14 Nov 2021 18:43:46 +0000 (13:43 -0500)]
sim: bfin: fix mach/xfail usage in tests
Set the mach to the right value all the time, and update xfail to
say the test fails on all targets. WIth multitarget testing, the
idea of target here doesn't make much sense.
Alan Modra [Mon, 15 Nov 2021 02:32:26 +0000 (13:02 +1030)]
-Waddress fixes for gold testsuite
Current mainline gcc.
common_test_1.c: In function 'main':
common_test_1.c:56:14: error: comparison between two arrays [-Werror=array-compare]
56 | assert (c5 > c4);
| ^
common_test_1.c:56:14: note: use '&c5[0] > &c4[0]' to compare the addresses
Alan Modra [Tue, 9 Nov 2021 22:19:05 +0000 (08:49 +1030)]
PowerPC64 @notoc in non-power10 code
R_PPC64_REL24_P9NOTOC is a variant of R_PPC64_REL24_NOTOC for use on
@notoc cals from non-power10 code in the rare case that using such a
construct is useful. R_PPC64_REL24_P9NOTOC will be emitted by gas
rather than R_PPC64_REL24_NOTOC when @notoc is used in a branch
instruction if power10 instructions are not enabled at that point.
The new relocation tells the linker to not use power10 instructions on
any stub emitted for that branch, unless overridden by
--power10-stubs=yes.
The current linker heuristic of only generating power10 instructions
for stubs if power10-only relocations are detected, continues to be
used.
include/
* elf/ppc64.h (R_PPC64_REL24_P9NOTOC): Define.
bfd/
* reloc.c (BFD_RELOC_PPC64_REL24_P9NOTOC): Define.
* elf64-ppc.c (ppc64_elf_howto_raw): Add entry for new reloc.
(ppc64_elf_reloc_type_lookup): Handle it.
(enum ppc_stub_type): Delete.
(enum ppc_stub_main_type, ppc_stub_sub_type): New.
(struct ppc_stub_type): New.
(struct ppc_stub_hash_entry): Use the above new type.
(struct ppc_link_hash_table): Update stub_count.
(is_branch_reloc, ppc64_elf_check_relocs),
(toc_adjusting_stub_needed): Handle new reloc.
(stub_hash_newfunc, select_alt_stub, ppc_merge_stub),
(ppc_type_of_stub, plt_stub_size, build_plt_stub),
(build_tls_get_addr_head, build_tls_get_addr_tail),
(ppc_build_one_stub, ppc_size_one_stub, ppc64_elf_size_stubs),
(ppc64_elf_build_stubs, ppc64_elf_relocate_section): Handle new
reloc. Modify stub handling to suit new scheme.
* bfd-in2.h: Regenerate.
* libbfd.h: Regenerate.
gas/
* config/tc-ppc.c (ppc_elf_suffix): When power10 is not enabled
return BFD_RELOC_PPC64_REL24_P9NOTOC for @notoc.
(fixup_size, ppc_force_relocation, ppc_fix_adjustable): Handle
BFD_RELOC_PPC64_REL24_P9NOTOC.
ld/
* testsuite/ld-powerpc/callstub-2.s: Add .machine power10.
Alan Modra [Sun, 14 Nov 2021 23:19:54 +0000 (09:49 +1030)]
Regenerate a couple of files
A couple of files changed on my latest --enable-maintainer-mode
build. ld/Makefile.in had a missing dependency but better sorting of
the loongson entries.
Pedro Alves [Tue, 9 Nov 2021 17:33:41 +0000 (17:33 +0000)]
Fix build with current GCC: EL_EXPLICIT(location) always non-NULL
Compiling GDB with current GCC (1b4a63593b) runs into this:
src/gdb/location.c: In function 'int event_location_empty_p(const event_location*)':
src/gdb/location.c:963:38: error: the address of 'event_location::<unnamed union>::explicit_loc' will never be NULL [-Werror=address]
963 | return (EL_EXPLICIT (location) == NULL
| ^
src/gdb/location.c:57:30: note: 'event_location::<unnamed union>::explicit_loc' declared here
57 | struct explicit_location explicit_loc;
| ^~~~~~~~~~~~
GCC is right, EL_EXPLICIT is defined as returning the address of an
union field:
Lancelot SIX [Mon, 11 Oct 2021 22:42:33 +0000 (23:42 +0100)]
[PR gdb/16238] Add completer for the show user command
The 'show user' command (which shows the definition of non-python/scheme
user defined commands) is currently missing a completer. This is
mentioned in PR 16238. Having one can improve the user experience.
In this commit I propose an implementation for such completer as well as
the associated tests.
Mike Frysinger [Fri, 12 Nov 2021 00:30:41 +0000 (19:30 -0500)]
sim: sh: rework carry checks to not rely on integer overflows
In <=gcc-7 versions, -fstrict-overflow is enabled by default, and that
triggers warnings in this code that relies on integer overflows to test
for carries. Change the logic to test against the limit directly.
Carl Love [Fri, 5 Nov 2021 20:25:28 +0000 (20:25 +0000)]
Fix gdb.base/sigstep.exp test for ppc
The test stops at <signal_handler called> which is the call to the handler
rather than in the handler as intended. This patch replaces the
gdb_test "$enter_cmd to handler" with a gdb_test_multiple test. The multiple
test looks for the stop at <signal_handler called>. If found, the command
is issued again. The test passes if gdb stops in the handler as expected.
(gdb) PASS: gdb.base/sigstep.exp: stepi to handler, nothing in handler, step
from handler: continue to signal
stepi
<signal handler called>
1: x/i $pc
=> 0x7ffff7f80440 <__kernel_start_sigtramp_rt64>: bctrl
(gdb) stepi
handler (sig=551) at sigstep.c:32
32 {
1: x/i $pc
=> 0x10000097c <handler>: addis r2,r12,2
(gdb) PASS: gdb.base/sigstep.exp: stepi to handler, nothing in handler,
step from handler: stepi to handler
Patch has been tested on x86_64-linux and ppc64le-linux with no test failures.
Tom de Vries [Fri, 12 Nov 2021 16:12:56 +0000 (17:12 +0100)]
[gdb/testsuite] Fix regexp in gdb.base/foll-vfork.exp
On OBS I ran into:
...
(gdb) PASS: gdb.base/foll-vfork.exp: exit: \
vfork relations in info inferiors: continue to child exit
info inferiors^M
Num Description Connection Executable ^M
1 <null> foll-vfork-exit ^M
* 2 <null> foll-vfork-exit ^M
(gdb) I'm the proud parent of child #5044!^M
FAIL: gdb.base/foll-vfork.exp: exit: vfork relations in info inferiors: \
vfork relation no longer appears in info inferiors (timeout)
...
Fix this by removing the '$' anchor in the corresponding '$gdb_prompt $'
regexps.
Alan Modra [Thu, 11 Nov 2021 09:51:32 +0000 (20:21 +1030)]
Fix demangle style usage info
Extract allowed styles from libiberty, so we don't have to worry about
our help messages getting out of date. The function probably belongs
in libiberty/cplus-dem.c but it can be here for a while to iron out
bugs.
PR 28581
* demanguse.c: New file.
* demanguse.h: New file.
* nm.c (usage): Break up output. Use display_demangler_styles.
* objdump.c (usage): Use display_demangler_styles.
* readelf.c (usage): Likewise.
* Makefile.am: Add demanguse.c and demanguse.h.
* Makefile.in: Regenerate.
* po/POTFILESin: Regenerate.
Simon Marchi [Mon, 8 Nov 2021 21:49:21 +0000 (16:49 -0500)]
gdb: fix "set scheduler-locking" thread exit hang
GDB hangs when doing this:
- launch inferior with multiple threads
- multiple threads hit some breakpoint(s)
- one breakpoint hit is presented as a stop, the rest are saved as
pending wait statuses
- "set scheduler-locking on"
- resume the currently selected thread (because of scheduler-locking,
it's the only one resumed), let it execute until exit
- GDB hangs, not showing the prompt, impossible to interrupt with ^C
When the resumed thread exits, we expect the target to return a
TARGET_WAITKIND_NO_RESUMED event, and that's what we see:
The problem is in handle_no_resumed: we check if some other thread is
actually resumed, to see if we should ignore that event (see comments in
that function for more info). If this condition is true:
... then we ignore the event. The problem is that there are some non-resumed
threads with a pending event, which makes us ignore the event. But these
threads are not resumed, so we end up waiting while nothing executes, hence
waiting for ever.
... but then it occured to me that we could simply check for:
(thread->resumed ())
Since "executing" implies "resumed", checking simply for "resumed"
covers threads that are resumed and executing, as well as threads that
are resumed with a pending status, which is what we want.
Tom de Vries [Thu, 11 Nov 2021 10:22:39 +0000 (11:22 +0100)]
[gdb/build] Fix Wimplicit-exception-spec-mismatch in clang build
When building with clang 13 (and -std=gnu++17 to work around an issue in
string_view-selftests.c), we run into a few Wimplicit-exception-spec-mismatch
warnings:
...
src/gdbsupport/new-op.cc:102:1: error: function previously declared with an \
explicit exception specification redeclared with an implicit exception \
specification [-Werror,-Wimplicit-exception-spec-mismatch]
operator delete (void *p)
^
/usr/include/c++/11/new:130:6: note: previous declaration is here
void operator delete(void*) _GLIBCXX_USE_NOEXCEPT
^
...
These are due to recent commit 5fff6115fea "Fix
LD_PRELOAD=/usr/lib64/libasan.so.6 gdb".
Fix this by adding the missing noexcept.
Build on x86_64-linux, using gcc 7.5.0 and clang 13.0.0.
Tom de Vries [Thu, 11 Nov 2021 10:22:39 +0000 (11:22 +0100)]
[gdb/build] Fix build with -std=c++11
When building with -std=c++11, we run into two Werror=missing-declarations:
...
new-op.cc: In function 'void operator delete(void*, std::size_t)':
new-op.cc:114:1: error: no previous declaration for \
'void operator delete(void*, std::size_t)' [-Werror=missing-declarations]
operator delete (void *p, std::size_t) noexcept
^~~~~~~~
new-op.cc: In function 'void operator delete [](void*, std::size_t)':
new-op.cc:132:1: error: no previous declaration for \
'void operator delete [](void*, std::size_t)' [-Werror=missing-declarations]
operator delete[] (void *p, std::size_t) noexcept
^~~~~~~~
...
These are due to recent commit 5fff6115fea "Fix
LD_PRELOAD=/usr/lib64/libasan.so.6 gdb".
The declarations are provided by <new> (which is included) for c++14 onwards,
but they are missing for c++11.
Fix this by adding the missing declarations.
Tested on x86_64-linux, with gcc 7.5.0, both without (implying -std=gnu++14) and
with -std=c++11.
Add a regression test-case for commit a50bdb99afe "[gdb/tdep, rs6000] Don't
skip system call in skip_prologue":
- set a breakpoint on a local copy of glibc's _exit, and
- verify that it triggers.
The test-case uses an assembly file by default, but also has the possibility
to use a C source file instead.
Tested on ppc64le-linux. Verified that the test-case fails without
aforementioned commit, and passes with the commit. Both with assembly
and C source.
Nelson Chu [Mon, 8 Nov 2021 08:35:25 +0000 (16:35 +0800)]
RISC-V: Dump objects according to the elf architecture attribute.
For now we should always generate the elf architecture attribute both for
elf and linux toolchains, so that we could dump the objects correctly
according to the generated architecture string. This patch resolves the
problem that we probably dump an object with c.nop instructions, but
in fact the c extension isn't allowed. Consider the following case,
The c.nop at address 0x6 is generated for alignment, but since the rvc isn't
allowed for this object, dump it as a c.nop instruction looks wrong. After
applying this patch, I get the following result,
For the current objdump, we dump data to .byte/.short/.word/.dword, and
dump the unknown or unsupported instructions to .2byte/.4byte/.8byte, which
respectively are 2, 4 and 8 bytes instructions. Therefore, we shouldn't
dump the 0x0001 as a c.nop instruction in the above case, we should dump
it to .2byte 0x1 as a unknown instruction, since the rvc is disabled.
However, consider that some people may use the new objdump to dump the old
objects, which don't have any elf attributes. We usually set the default
architecture string to rv64g by bfd/elfxx-riscv.c:riscv_set_default_arch.
But this will cause rvc instructions to be unrecognized. Therefore, we
set the default architecture string to rv64gc for disassembler, to keep
the previous behavior.
This patch pass the riscv-gnu-toolchain gcc/binutils regressions for
rv32emc-elf, rv32gc-linux, rv32i-elf, rv64gc-elf and rv64gc-linux
toolchains. Also, tested by --enable-targets=all and can build
riscv-gdb successfully.
bfd/
* elfnn-riscv.c (riscv_merge_arch_attr_info): Tidy the
codes for riscv_parse_subset_t setting.
* elfxx-riscv.c (riscv_get_default_ext_version): Updated.
(riscv_subset_supports): Moved from gas/config/tc-riscv.c.
(riscv_multi_subset_supports): Likewise.
* elfxx-riscv.h: Added extern for riscv_subset_supports and
riscv_multi_subset_supports.
gas/
* config/tc-riscv.c (riscv_subset_supports): Moved to
bfd/elfxx-riscv.c.
(riscv_multi_subset_supports): Likewise.
(riscv_rps_as): Defined for architectrue parser.
(riscv_set_arch): Updated.
(riscv_set_abi_by_arch): Likewise.
(riscv_csr_address): Likewise.
(reg_lookup_internal): Likewise.
(riscv_ip): Likewise.
(s_riscv_option): Updated.
* testsuite/gas/riscv/mapping-04b.d: Updated.
* testsuite/gas/riscv/mapping-norelax-03b.d: Likewise.
* testsuite/gas/riscv/mapping-norelax-04b.d: Likewise.
opcodes/
* riscv-dis.c: Include elfxx-riscv.h since we need the
architecture parser. Also removed the cpu-riscv.h, it
is already included in elfxx-riscv.h.
(default_isa_spec): Defined since the parser need this
to set the default architecture string.
(xlen): Moved out from riscv_disassemble_insn as a global
variable, it is more convenient to initialize riscv_rps_dis.
(riscv_subsets): Defined to recoed the supported
extensions.
(riscv_rps_dis): Defined for architectrue parser.
(riscv_disassemble_insn): Call riscv_multi_subset_supports
to make sure if the instructions are valid or not.
(print_insn_riscv): Initialize the riscv_subsets by parsing
the elf architectrue attribute. Otherwise, set the default
architectrue string to rv64gc.
Since gcc dropped support for a.out starting with 4.4.0 in 2009, it's
been impossible to verify this code actually still works. Since it
crashes in ld, and it uses a config option that no other tests uses
and we want to remove, drop the test to avoid all the trouble.
Mike Frysinger [Thu, 11 Nov 2021 05:14:46 +0000 (00:14 -0500)]
sim: io: tweak compiler workaround with error output
Outputting an extra space broke a cris test. Change the workaround
to use %s with an empty string to avoid the compiler warning but not
output an extra space.
Mike Frysinger [Thu, 11 Nov 2021 02:58:08 +0000 (21:58 -0500)]
sim: testsuite: delete unused arm remote host logic
There's no need to sync testutils.inc with remote hosts. The one
we have in the source tree is all we need and only thing we test.
Delete it to simplify.
Mike Frysinger [Wed, 10 Nov 2021 06:10:00 +0000 (01:10 -0500)]
sim: synacor: simplify test generation
Objcopy was used to create a binary file of just the executable code
since the environment requires code to based at address 0. We can
accomplish the same thing with the -Ttext=0 flag, so switch to that
to get rid of custom logic.
Tom Tromey [Wed, 10 Nov 2021 19:15:02 +0000 (12:15 -0700)]
Handle PIE in .debug_loclists
Simon pointed out that my recent patches to .debug_loclists caused
some regressions. After a brief discussion we realized it was because
his system compiler defaults to PIE.
This patch changes this code to unconditionally apply the text offset
here. It also changes loclist_describe_location to work more like
dwarf2_find_location_expression.
I tested this by running the gdb.dwarf2 tests both with and without
-pie.
Clément Chigot [Wed, 10 Nov 2021 12:35:07 +0000 (13:35 +0100)]
gdb: adjust x_file fields on COFF readers
Commit e86fc4a5bc37 ("PR 28447: implement multiple parameters for .file
on XCOFF") changes the structure associated to the internal
representation of files in COFF formats. However, gdb directory update
has been forgotten, leading to compilation errors of this kind:
CXX coffread.o
/home/simark/src/binutils-gdb/gdb/coffread.c: In function 'const char* coff_getfilename(internal_auxent*)':
/home/simark/src/binutils-gdb/gdb/coffread.c:1343:29: error: 'union internal_auxent::<unnamed struct>::<unnamed>' has no member named 'x_zeroes'
1343 | if (aux_entry->x_file.x_n.x_zeroes == 0)
| ^~~~~~~~
Tom de Vries [Wed, 10 Nov 2021 11:55:55 +0000 (12:55 +0100)]
[gdb/testsuite] Add gdb.opt/break-on-_exit.exp
Add a test-case to excercise the problem scenario reported in PR28527 and
fixed in commit a50bdb99afe "[gdb/tdep, rs6000] Don't skip system call in
skip_prologue":
- set a breakpoint on _exit, and
- verify that it triggers.
Note that this is not a regression test for that commit. Since the actual
code in _exit may vary across os instances, we cannot guarantee that the
problem will always trigger with this test-case.
Rather, this test-case is a version of the original test-case
(gdb.threads/process-dies-while-detaching.exp) that is minimal while still
reproducing the problem reported in PR28527, in that same setting.
The benefit of this test-case is that it exercise real-life code and may
expose similar problems in other settings. Also, it provides a much easier
test-case to investigate in case a similar problem occurs.
Mike Frysinger [Wed, 10 Nov 2021 10:15:33 +0000 (05:15 -0500)]
sim: frv: flip trapdump default back to off
When I refactored this by scoping it to sim-frv-xxx in commit e7954ef5e5ed90fb7d28c013518f4c2e6bcd20a1 ("sim: frv: scope the
unique configure flag"), I changed the default from off to on.
While the feature is nice for developers, it breaks a bunch of
tests which aren't expecting this extra output. So flip it back
to off by default.
Pekka Seppänen [Wed, 10 Nov 2021 09:45:19 +0000 (20:15 +1030)]
PR28575, readelf.c and strings.c use undefined type uint
Since --unicode support (commit b3aa80b45c4) both binutils/readelf.c
and binutils/strings.c use 'uint' in a few locations. It likely
should be 'unsigned int' since there isn't anything defining 'uint'
within binutils (besides zlib) and AFAIK it isn't a standard type.
Clément Chigot [Thu, 11 Mar 2021 10:08:17 +0000 (11:08 +0100)]
ld: set correct flags for AIX shared tests
Previous flags were aimed to be run with XLC.
Nowadays, only GCC is being tested with GNU toolchain. Moreover,
recent XLC versions might also accept "-shared".
Clément Chigot [Fri, 15 Oct 2021 14:12:39 +0000 (16:12 +0200)]
PR 28447: implement multiple parameters for .file on XCOFF
On XCOFF, ".file" pseudo-op allows 3 extras parameters to provide
additional information to AIX linker, or its debugger. These are
stored in auxiliary entries of the C_FILE symbol.
bfd/
PR 28447
* coffcode.h (combined_entry_type): Add extrap field.
(coff_bigobj_swap_aux_in): Adjust names of x_file fields.
(coff_bigobj_swap_aux_out): Likewise.
* coffgen.c (coff_write_auxent_fname): New function.
(coff_fix_symbol_name): Write x_file using
coff_write_auxent_fname.
(coff_write_symbol): Likewise.
(coff_write_symbols): Add C_FILE auxiliary entries to
string table if needed.
(coff_get_normalized_symtab): Adjust names of x_file fields.
Normalize C_FILE auxiliary entries.
(coff_print_symbol): Print C_FILE auxiliary entries.
* coff-rs6000.c (_bfd_xcoff_swap_aux_in): Adjust names of
x_file fields.
(_bfd_xcoff_swap_aux_out): Likewise.
* coff64-rs6000.c (_bfd_xcoff64_swap_aux_in): Likewise.
(_bfd_xcoff64_swap_aux_out): Likewise.
* cofflink.c (_bfd_coff_final_link): Likewise.
(_bfd_coff_link_input_bfd): Likewise.
* coffswap.h (coff_swap_aux_in): Likewise.
* peXXigen.c (_bfd_XXi_swap_aux_in): Likewise.
(_bfd_XXi_swap_aux_out): Likewise.
* xcofflink.c (xcoff_link_input_bfd): Likewise.
* libcoff.h: Regenerate.
gas/
* config/tc-ppc.c (ppc_file): New function.
* config/tc-ppc.h (OBJ_COFF_MAX_AUXENTRIES): Change to 4.
* testsuite/gas/ppc/aix.exp: Add tests.
* testsuite/gas/ppc/xcoff-file-32.d: New test.
* testsuite/gas/ppc/xcoff-file-64.d: New test.
* testsuite/gas/ppc/xcoff-file.s: New test.
include/
* coff/internal.h (union internal_auxent): Change x_file to be a
struct instead of a union. Add x_ftype field.
* coff/rs6000.h (union external_auxent): Add x_resv field.
* coff/xcoff.h (XFT_FN): New define.
(XFT_CT): Likewise.
(XFT_CV): Likewise.
(XFT_CD): Likewise.
The name of this new test was based on that of an existing test,
bp-cmds-execution-x-script.exp. I started off by copying that test,
adding to it, and then rewriting almost all of it. It's different
enough that I decided that listing the copyright year as 2021
was sufficient.
Since creating that bug report, I've found a somewhat simpler way of
reproducing the problem. I've encapsulated it into the GDB test case
which I've created along with this bug fix. The name of the new test
is gdb.base/dprintf-execution-x-script.exp, I'll demonstrate the
problem using this test case, though for brevity, I've placed all
relevant files in the same directory and have renamed the files to all
start with 'dp-bug' instead of 'dprintf-execution-x-script'.
The script file, named dp-bug.gdb, consists of the following commands:
dprintf increment, "dprintf in increment(), vi=%d\n", vi
break inc_vi
commands
continue
end
run
Note that the final command in this script is 'run'. When 'run' is
instead issued interactively, the bug does not occur. So, let's look
at the interactive case first in order to see the correct/expected
output:
$ gdb -q -x dp-bug.gdb dp-bug
... eliding buggy output which I'll discuss later ...
(gdb) run
Starting program: /mesquite2/sourceware-git/f34-master/bld/gdb/tmp/dp-bug
vi=0
dprintf in increment(), vi=0
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 in dprintf-execution-x-script.c
vi=1
dprintf in increment(), vi=1
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 in dprintf-execution-x-script.c
vi=2
dprintf in increment(), vi=2
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 in dprintf-execution-x-script.c
vi=3
[Inferior 1 (process 1539210) exited normally]
In this run, in which 'run' was issued from the gdb prompt (instead
of at the end of the script), there are three dprintf messages along
with three 'Breakpoint 2' messages. This is the correct output.
Now let's look at the output that I snipped above; this is the output
when 'run' is issued from the script loaded via GDB's -x switch:
$ gdb -q -x dp-bug.gdb dp-bug
Reading symbols from dp-bug...
Dprintf 1 at 0x40116e: file dprintf-execution-x-script.c, line 38.
Breakpoint 2 at 0x40113a: file dprintf-execution-x-script.c, line 26.
vi=0
dprintf in increment(), vi=0
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 dprintf-execution-x-script.c: No such file or directory.
vi=1
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 in dprintf-execution-x-script.c
vi=2
Breakpoint 2, inc_vi () at dprintf-execution-x-script.c:26
26 in dprintf-execution-x-script.c
vi=3
[Inferior 1 (process 1539175) exited normally]
In the output shown above, only the first dprintf message is printed.
The 2nd and 3rd dprintf messages are missing! However, all three
'Breakpoint 2...' messages are still printed.
Why does this happen?
bpstat_do_actions_1() in gdb/breakpoint.c contains the following
comment and code near the start of the function:
/* Avoid endless recursion if a `source' command is contained
in bs->commands. */
if (executing_breakpoint_commands)
return 0;
Also, as described by this comment prior to the 'async' field
in 'struct ui' in top.h, the main UI starts off in sync mode
when processing command line arguments:
/* True if the UI is in async mode, false if in sync mode. If in
sync mode, a synchronous execution command (e.g, "next") does not
return until the command is finished. If in async mode, then
running a synchronous command returns right after resuming the
target. Waiting for the command's completion is later done on
the top event loop. For the main UI, this starts out disabled,
until all the explicit command line arguments (e.g., `gdb -ex
"start" -ex "next"') are processed. */
This combination of things, the state of the static global
'executing_breakpoint_commands' plus the state of the async
field in the main UI causes this behavior.
This is a backtrace after hitting the dprintf breakpoint for
the second time when doing 'run' from the script file, i.e.
non-interactively:
Thread 1 "gdb" hit Breakpoint 3, bpstat_do_actions_1 (bsp=0x7fffffffc2b8)
at /ironwood1/sourceware-git/f34-master/bld/../../worktree-master/gdb/breakpoint.c:4431
4431 if (executing_breakpoint_commands)
#0 bpstat_do_actions_1 (bsp=0x7fffffffc2b8)
at gdb/breakpoint.c:4431
#1 0x00000000004d8bc6 in dprintf_after_condition_true (bs=0x1538090)
at gdb/breakpoint.c:13048
#2 0x00000000004c5caa in bpstat_stop_status (aspace=0x116dbc0, bp_addr=0x40116e, thread=0x137f450, ws=0x7fffffffc718,
stop_chain=0x1538090) at gdb/breakpoint.c:5498
#3 0x0000000000768d98 in handle_signal_stop (ecs=0x7fffffffc6f0)
at gdb/infrun.c:6172
#4 0x00000000007678d3 in handle_inferior_event (ecs=0x7fffffffc6f0)
at gdb/infrun.c:5662
#5 0x0000000000763cd5 in fetch_inferior_event ()
at gdb/infrun.c:4060
#6 0x0000000000746d7d in inferior_event_handler (event_type=INF_REG_EVENT)
at gdb/inf-loop.c:41
#7 0x00000000007a702f in handle_target_event (error=0, client_data=0x0)
at gdb/linux-nat.c:4207
#8 0x0000000000b8cd6e in gdb_wait_for_event (block=block@entry=0)
at gdbsupport/event-loop.cc:701
#9 0x0000000000b8d032 in gdb_wait_for_event (block=0)
at gdbsupport/event-loop.cc:597
#10 gdb_do_one_event () at gdbsupport/event-loop.cc:212
#11 0x00000000009d19b6 in wait_sync_command_done ()
at gdb/top.c:528
#12 0x00000000009d1a3f in maybe_wait_sync_command_done (was_sync=0)
at gdb/top.c:545
#13 0x00000000009d2033 in execute_command (p=0x7fffffffcb18 "", from_tty=0)
at gdb/top.c:676
#14 0x0000000000560d5b in execute_control_command_1 (cmd=0x13b9bb0, from_tty=0)
at gdb/cli/cli-script.c:547
#15 0x000000000056134a in execute_control_command (cmd=0x13b9bb0, from_tty=0)
at gdb/cli/cli-script.c:717
#16 0x00000000004c3bbe in bpstat_do_actions_1 (bsp=0x137f530)
at gdb/breakpoint.c:4469
#17 0x00000000004c3d40 in bpstat_do_actions ()
at gdb/breakpoint.c:4533
#18 0x00000000006a473a in command_handler (command=0x1399ad0 "run")
at gdb/event-top.c:624
#19 0x00000000009d182e in read_command_file (stream=0x113e540)
at gdb/top.c:443
#20 0x0000000000563697 in script_from_file (stream=0x113e540, file=0x13bb0b0 "dp-bug.gdb")
at gdb/cli/cli-script.c:1642
#21 0x00000000006abd63 in source_gdb_script (extlang=0xc44e80 <extension_language_gdb>, stream=0x113e540,
file=0x13bb0b0 "dp-bug.gdb") at gdb/extension.c:188
#22 0x0000000000544400 in source_script_from_stream (stream=0x113e540, file=0x7fffffffd91a "dp-bug.gdb",
file_to_open=0x13bb0b0 "dp-bug.gdb")
at gdb/cli/cli-cmds.c:692
#23 0x0000000000544557 in source_script_with_search (file=0x7fffffffd91a "dp-bug.gdb", from_tty=1, search_path=0)
at gdb/cli/cli-cmds.c:750
#24 0x00000000005445cf in source_script (file=0x7fffffffd91a "dp-bug.gdb", from_tty=1)
at gdb/cli/cli-cmds.c:759
#25 0x00000000007cf6d9 in catch_command_errors (command=0x5445aa <source_script(char const*, int)>,
arg=0x7fffffffd91a "dp-bug.gdb", from_tty=1, do_bp_actions=false)
at gdb/main.c:523
#26 0x00000000007cf85d in execute_cmdargs (cmdarg_vec=0x7fffffffd1b0, file_type=CMDARG_FILE, cmd_type=CMDARG_COMMAND,
ret=0x7fffffffd18c) at gdb/main.c:615
#27 0x00000000007d0c8e in captured_main_1 (context=0x7fffffffd3f0)
at gdb/main.c:1322
#28 0x00000000007d0eba in captured_main (data=0x7fffffffd3f0)
at gdb/main.c:1343
#29 0x00000000007d0f25 in gdb_main (args=0x7fffffffd3f0)
at gdb/main.c:1368
#30 0x00000000004186dd in main (argc=5, argv=0x7fffffffd508)
at gdb/gdb.c:32
There are two frames for bpstat_do_actions_1(), one at frame #16 and
the other at frame #0. The one at frame #16 is processing the actions
for Breakpoint 2, which is a 'continue'. The one at frame #0 is attempting
to process the dprintf breakpoint action. However, at this point,
the value of 'executing_breakpoint_commands' is 1, forcing an early
return, i.e. prior to executing the command(s) associated with the dprintf
breakpoint.
For the sake of comparison, this is what the stack looks like when hitting
the dprintf breakpoint for the second time when issuing the 'run'
command from the GDB prompt.
Thread 1 "gdb" hit Breakpoint 3, bpstat_do_actions_1 (bsp=0x7fffffffccd8)
at /ironwood1/sourceware-git/f34-master/bld/../../worktree-master/gdb/breakpoint.c:4431
4431 if (executing_breakpoint_commands)
#0 bpstat_do_actions_1 (bsp=0x7fffffffccd8)
at gdb/breakpoint.c:4431
#1 0x00000000004d8bc6 in dprintf_after_condition_true (bs=0x16b0290)
at gdb/breakpoint.c:13048
#2 0x00000000004c5caa in bpstat_stop_status (aspace=0x116dbc0, bp_addr=0x40116e, thread=0x13f0e60, ws=0x7fffffffd138,
stop_chain=0x16b0290) at gdb/breakpoint.c:5498
#3 0x0000000000768d98 in handle_signal_stop (ecs=0x7fffffffd110)
at gdb/infrun.c:6172
#4 0x00000000007678d3 in handle_inferior_event (ecs=0x7fffffffd110)
at gdb/infrun.c:5662
#5 0x0000000000763cd5 in fetch_inferior_event ()
at gdb/infrun.c:4060
#6 0x0000000000746d7d in inferior_event_handler (event_type=INF_REG_EVENT)
at gdb/inf-loop.c:41
#7 0x00000000007a702f in handle_target_event (error=0, client_data=0x0)
at gdb/linux-nat.c:4207
#8 0x0000000000b8cd6e in gdb_wait_for_event (block=block@entry=0)
at gdbsupport/event-loop.cc:701
#9 0x0000000000b8d032 in gdb_wait_for_event (block=0)
at gdbsupport/event-loop.cc:597
#10 gdb_do_one_event () at gdbsupport/event-loop.cc:212
#11 0x00000000007cf512 in start_event_loop ()
at gdb/main.c:421
#12 0x00000000007cf631 in captured_command_loop ()
at gdb/main.c:481
#13 0x00000000007d0ebf in captured_main (data=0x7fffffffd3f0)
at gdb/main.c:1353
#14 0x00000000007d0f25 in gdb_main (args=0x7fffffffd3f0)
at gdb/main.c:1368
#15 0x00000000004186dd in main (argc=5, argv=0x7fffffffd508)
at gdb/gdb.c:32
This relatively short backtrace is due to the current UI's async field
being set to 1.
Yet another thing to be aware of regarding this problem is the
difference in the way that commands associated to dprintf breakpoints
versus regular breakpoints are handled. While they both use a command
list associated with the breakpoint, regular breakpoints will place
the commands to be run on the bpstat chain constructed in
bp_stop_status(). These commands are run later on. For dprintf
breakpoints, commands are run via the 'after_condition_true' function
pointer directly from bpstat_stop_status(). (The 'commands' field in
the bpstat is cleared in dprintf_after_condition_true(). This
prevents the dprintf commands from being run again later on when other
commands on the bpstat chain are processed.)
Another thing that I noticed is that dprintf breakpoints are the only
type of breakpoint which use 'after_condition_true'. This suggests
that one possible way of fixing this problem, that of making dprintf
breakpoints work more like regular breakpoints, probably won't work.
(I must admit, however, that my understanding of this code isn't
complete enough to say why. I'll trust that whoever implemented it
had a good reason for doing it this way.)
The comment referenced earlier regarding 'executing_breakpoint_commands'
states that the reason for checking this variable is to avoid
potential endless recursion when a 'source' command appears in
bs->commands. We know that a dprintf command is constrained to either
1) execution of a GDB printf command, 2) an inferior function call of
a printf-like function, or 3) execution of an agent-printf command.
Therefore, infinite recursion due to a 'source' command cannot happen
when executing commands upon hitting a dprintf breakpoint.
I chose to fix this problem by having dprintf_after_condition_true()
directly call execute_control_commands(). This means that it no
longer attempts to go through bpstat_do_actions_1() avoiding the
infinite recursion check for potential 'source' commands on the
command chain. I think it simplifies this code a little bit too, a
definite bonus.
Alan Modra [Mon, 8 Nov 2021 22:32:03 +0000 (09:02 +1030)]
PR28542, Undefined behaviours in readelf.c
PR 28542
* readelf.c (dump_relocations): Check that section headers have
been read before attempting to access section name.
(print_dynamic_symbol): Likewise.
(process_mips_specific): Delete dead code.
Simon Marchi [Tue, 2 Nov 2021 19:05:39 +0000 (15:05 -0400)]
gdb.debuginfod/fetch_src_and_symbols.exp: fix when GDB is built with AddressSanitizer
This test fails for me, showing:
ERROR: tcl error sourcing /home/smarchi/src/binutils-gdb/gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp.
ERROR: This GDB was configured as follows:
configure --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-auto-load-dir=$debugdir:$datadir/auto-load
--with-auto-load-safe-path=$debugdir:$datadir/auto-load
... and much more ...
The problem is that TCL's exec throws an error as soon as the exec'ed
process outputs on stderr. When GDB is built with ASan, it prints some
warnings about pre-existing signal handlers:
warning: Found custom handler for signal 7 (Bus error) preinstalled.
warning: Found custom handler for signal 8 (Floating point exception) preinstalled.
warning: Found custom handler for signal 11 (Segmentation fault) preinstalled.
Tom Tromey [Mon, 8 Nov 2021 17:58:27 +0000 (10:58 -0700)]
Correctly handle DW_LLE_start_end
When the code to handle DW_LLE_start_end was added (as part of some
DWARF 5 work), it was written to add the base address. However, this
seems incorrect -- the DWARF standard describes this as an address,
not an offset from the base address.
This patch changes a couple of spots in dwarf2/loc.c to fix this
problem. It then changes decode_debug_loc_addresses to return
DEBUG_LOC_OFFSET_PAIR instead, which preserves the previous semantics.
This only showed up on the RISC-V target internally, due to the
combination of DWARF 5 and a newer version of GCC. I've updated a
couple of existing loclists test cases to demonstrate the bug.
Tom Tromey [Wed, 12 May 2021 18:39:22 +0000 (12:39 -0600)]
Fix build on rhES5
The rhES5 build failed due to an upstream import a while back. The
bug here is that, while the 'personality' function exists,
ADDR_NO_RANDOMIZE is only defined in <linux/personality.h>, not
<sys/personality.h>.
However, <linux/personality.h> does not declare the 'personality'
function, and <sys/personality.h> and <linux/personality.h> cannot
both be included.
This patch restores one of the removed configure checks and updates
the code to check it.
We had this as a local patch at AdaCore, because it seemed like there
was no interest upstream. However, now it turns out that this fixes
PR build/28555, so I'm sending it now.
* doc/refcard/txirefcard.tex: @setfilename is no longer
mandatory. Do not mention @validatemenus or explicitly giving
@node pointers, as these are not very important features.
Nick Clifton [Tue, 9 Nov 2021 13:25:42 +0000 (13:25 +0000)]
Add --unicode option to control how unicode characters are handled by display tools.
* nm.c: Add --unicode option to control how unicode characters are
handled.
* objdump.c: Likewise.
* readelf.c: Likewise.
* strings.c: Likewise.
* binutils.texi: Document the new feature.
* NEWS: Document the new feature.
* testsuite/binutils-all/unicode.exp: New file.
* testsuite/binutils-all/nm.hex.unicode
* testsuite/binutils-all/strings.escape.unicode
* testsuite/binutils-all/objdump.highlight.unicode
* testsuite/binutils-all/readelf.invalid.unicode
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