binutils-gdb.git
18 months agoppc/svp64: obtain SVP64 disassembly context
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:26 +0000 (21:27 +0300)]
ppc/svp64: obtain SVP64 disassembly context

18 months agoppc/svp64: share SVP64 context via libopcodes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:26 +0000 (21:27 +0300)]
ppc/svp64: share SVP64 context via libopcodes

18 months agoppc/svp64: introduce SVP64 opcode lookup
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:26 +0000 (21:27 +0300)]
ppc/svp64: introduce SVP64 opcode lookup

18 months agoppc: decouple print_insn_powerpc_opcode routine
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:26 +0000 (21:27 +0300)]
ppc: decouple print_insn_powerpc_opcode routine

18 months agoppc/svp64: reuse md_parse_name in md_operand
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: reuse md_parse_name in md_operand

18 months agoppc/svp64: introduce alias for 1<<%r3 predicate
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: introduce alias for 1<<%r3 predicate

18 months agoppc/svp64: allow predicate macro expansion
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: allow predicate macro expansion

18 months agoppc/svp64: introduce SVP64 name parser
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: introduce SVP64 name parser

18 months agoppc/svp64: allow w/dw/sw macro expansion
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: allow w/dw/sw macro expansion

18 months agoppc/svp64: remap operands and build instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: remap operands and build instructions

18 months agoppc/svp64: support SVP64 vectors
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support SVP64 vectors

18 months agoppc: refactor assembly logic
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc: refactor assembly logic

18 months agoppc/svp64: validate and fix modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: validate and fix modes

18 months agoppc/svp64: validate SVP64 context
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: validate SVP64 context

18 months agoppc/svp64: support svm mode
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support svm mode

18 months agoppc/svp64: support crm mode
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support crm mode

18 months agoppc/svp64: support mr/mrr modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support mr/mrr modes

18 months agoppc/svp64: support ff/pr modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support ff/pr modes

18 months agoppc/svp64: support zz/dz/sz specifier
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support zz/dz/sz specifier

18 months agoppc/svp64: support sat specifier
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support sat specifier

18 months agoppc/svp64: support sea specifier
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:25 +0000 (21:27 +0300)]
ppc/svp64: support sea specifier

18 months agoppc/svp64: support els specifier
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support els specifier

18 months agoppc/svp64: support w/dw/sw modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support w/dw/sw modes

18 months agoppc/svp64: support vec2/vec3/vec4 modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support vec2/vec3/vec4 modes

18 months agoppc/svp64: support m/dm/sm modes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support m/dm/sm modes

18 months agoppc/svp64: introduce svp64_decode stub
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: introduce svp64_decode stub

18 months agoppc/svp64: setup SVP64 opcodes table
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: setup SVP64 opcodes table

18 months agoopcodes: introduce SVP64 sources
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
opcodes: introduce SVP64 sources

18 months agoopcodes: introduce SVP64 headers
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
opcodes: introduce SVP64 headers

18 months agoppc/svp64: introduce svp64_assemble stub
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: introduce svp64_assemble stub

18 months agoppc: share pd_reg definition via libopcodes
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc: share pd_reg definition via libopcodes

18 months agoppc/svp64: support shadd/shadduw instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support shadd/shadduw instructions

18 months agoppc/svp64: support divmod2du instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support divmod2du instruction

18 months agoppc/svp64: support maddedu instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support maddedu instruction

18 months agoppc/svp64: support fptrans instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:24 +0000 (21:27 +0300)]
ppc/svp64: support fptrans instructions

18 months agoppc/svp64: support bmask instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support bmask instruction

18 months agoppc/svp64: support absd instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support absd instructions

18 months agoppc/svp64: support cprop instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support cprop instructions

18 months agoppc/svp64: support avgadd instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support avgadd instructions

18 months agoppc/svp64: support min/max instructions
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support min/max instructions

18 months agoppc/svp64: support fishmv instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support fishmv instruction

18 months agoppc/svp64: support fmvis instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support fmvis instruction

18 months agoppc/svp64: support svshape2 instruction
Dmitry Selyutin [Tue, 11 Apr 2023 18:27:23 +0000 (21:27 +0300)]
ppc/svp64: support svshape2 instruction

https://libre-soc.org/openpower/sv/
https://libre-soc.org/openpower/sv/remap/#svshape
https://libre-soc.org/openpower/sv/remap/#svshape2
https://libre-soc.org/openpower/isa/simplev/

18 months agoUpdated debug architecture version checks for fbsd
Luis Machado [Tue, 25 Apr 2023 08:22:09 +0000 (09:22 +0100)]
Updated debug architecture version checks for fbsd

There are two new debug architecture version entries.  I updated the
code for Linux, but fbsd also needs updating.

This patch does this, and should be pretty straightforward.

I can't test this on native fbsd, but I'm fairly confident it should
work.

Signed-off-by: Luis Machado <luis.machado@arm.com>
18 months agoAdd new debug architecture version
Luis Machado [Tue, 25 Apr 2023 08:17:43 +0000 (09:17 +0100)]
Add new debug architecture version

Teach gdb about a new debug architecture version for AArch64 (0x11).

No user-visible changes.

Regression-tested on aarch64-linux Ubuntu 20.04/22.04.

Signed-off-by: Luis Machado <luis.machado@arm.com>
18 months agoi386-dis.c UB shift and other tidies
Alan Modra [Wed, 26 Apr 2023 01:01:01 +0000 (10:31 +0930)]
i386-dis.c UB shift and other tidies

1) i386-dis.c:12055:11: runtime error: left shift of negative value -1
Bit twiddling is best done unsigned, due to UB on overflow of signed
expressions.  Fix this by using bfd_vma rather than bfd_signed_vma
everywhere in i386-dis.c except print_displacement.

2) Return get32s and get16 value in a bfd_vma, reducing the need for
temp variables.

3) Introduce get16s and get8s functions to simplify the code.

4) With some optimisation options gcc-13 legitimately complains about
a fall-through in OP_I.  Fix that.  OP_I also doesn't need to use
"mask" which was wrong for w_mode anyway.

5) Masking with & 0xffffffff is better than casting to unsigned.  We
don't know for sure that unsigned int is 32-bit.

6) We also don't know that unsigned char is 8 bits.  Mask codep
accesses everywhere.  I don't expect binutils will work on anything
other than an 8-bit char host, but if we are masking codep accesses in
some places we might as well be consistent.  (Better would be to use
stdint.h types more in binutils.)

19 months agobinutils runtest $CC
Alan Modra [Wed, 26 Apr 2023 00:29:40 +0000 (09:59 +0930)]
binutils runtest $CC

I noticed in the binutile Makefile that runtest is being invoked with
CC, CC_FOR_BUILD and other compiler related flags in the environment.
That doesn't work.  Those variables ought to be passed on the runtest
command line.

After fixing that I had some fails due to binutils testprog.c now
being compiled with the default "-g -O2" picked up in
CFLAGS_FOR_TARGET.  Hack around that by passing -O0.

Also, with the binutils testsuite now taking notice of CC_FOR_TARGET,
I found a couple of debuginfod.exp fails with one of my compilers that
happened to be built without --debug-id being enabled by default.

* Makefile.am (check-DEJAGNU): Pass $CC and other variable on
the runtest command line rather than futilely in the
environment.  Add -O0 to CFLAGS_FOR_TARGET.
* Makefile.in: Regenerate.
* testsuite/binutils-all/debuginfod.exp: Compile testprog.c
with -Wl,--build-id.

19 months agoAvoid another -Werror=dangling-pointer
Alan Modra [Tue, 25 Apr 2023 03:56:12 +0000 (13:26 +0930)]
Avoid another -Werror=dangling-pointer

write.c:415:7: error: dangling pointer ‘prev_frag’ to ‘dummy’ may be used

* write.c (chain_frchains_together_1): Rewrite loop as a do
while to avoid false positive -Wdangling-pointer.

19 months agoAutomatic date update in version.in
GDB Administrator [Wed, 26 Apr 2023 00:00:45 +0000 (00:00 +0000)]
Automatic date update in version.in

19 months agoUse scoped_restore in varobj.c
Tom Tromey [Mon, 24 Apr 2023 18:25:53 +0000 (12:25 -0600)]
Use scoped_restore in varobj.c

One spot in varobj.c should use scoped_restore to save and restore
input_radix.  Note that the current code may fail to restore it on
error, so this patch fixes a latent bug.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
19 months agoRemove some "goto"s from parse.c
Tom Tromey [Mon, 24 Apr 2023 19:03:03 +0000 (13:03 -0600)]
Remove some "goto"s from parse.c

parser_state::push_dollar has some unnecessary "goto"s.  Replacing
them cleans up the code.  Regression tested on x86-64 Fedora 36.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
19 months agosection-select: Fix performance problem (PR30367)
Michael Matz [Tue, 18 Apr 2023 14:16:01 +0000 (16:16 +0200)]
section-select: Fix performance problem (PR30367)

when using many wild-statements with non-wildcard filenames we
were running into quadraticness via repeatedly using lookup_name
on a long list of loaded files.  I've originally retained using
lookup_name because that preserved existing behaviour most obviously.
In particular in matching wild-statements when using a non-wildcard
filename it matches against local_sym_name, not the filename member.
If the wildspec would have an archive-spec or a wildcard it would use
the filename member, though.  Also it would load the named file
(and ignore it, as being not equal to the currently considered
input-statement).

Rewrite this to not use lookup_name but retain the comparison
against local_sym_name with a comment to that effect.

PR 30367
* ldlang.c (walk_wild_section_match): Don't use lookup_name
but directly compare spec and local_sym_name.

19 months agoRISC-V: adjust logic to avoid register name symbols
Jan Beulich [Tue, 25 Apr 2023 09:19:18 +0000 (11:19 +0200)]
RISC-V: adjust logic to avoid register name symbols

Special casing GPR names in my_getSmallExpression() leads to a number of
inconsistencies. Generalize this by utilizing the md_parse_name() hook,
limited to when instruction operands are being parsed (really: probed).
Then both the GPR lookup there and the yet more ad hoc workaround for
PR/gas 29940 can be removed (including its extension needed for making
the compressed form JAL work again).

19 months agoRISC-V: test for expected / no unexpected symbols
Jan Beulich [Tue, 25 Apr 2023 09:18:49 +0000 (11:18 +0200)]
RISC-V: test for expected / no unexpected symbols

Both the temporary workaround for PR/gas 29940 and the existing special
casing of GPRs in my_getSmallExpression() aren't really tested anywhere
(i.e. with the workarounds remove testing would still succeed). Nor is
there any test for uses of symbols with names matching GPRs, where such
is permitted. Before altering how this is to be dealt with, install two
testcases covering the expected behavior. (For now this includes only
known affected insns; re-ordering of entries in riscv_opcodes[] could,
however, yield more of them.)

19 months agoRISC-V: don't recognize bogus relocations
Jan Beulich [Tue, 25 Apr 2023 09:17:19 +0000 (11:17 +0200)]
RISC-V: don't recognize bogus relocations

With my_getSmallExpression() consistently and silently failing on
relocation operators not fitting an insn, it is no longer necessary to
hand it percent_op_itype[] "just in case" (i.e. to avoid errors when a
subsequent parsing attempt for another operand combination might
succeed). This also eliminates the latent problem of percent_op_itype[]
and percent_op_stype[] growing a non-identical set of recognized
relocation operators.

19 months agoRISC-V: avoid redundant and misleading/wrong error messages
Jan Beulich [Tue, 25 Apr 2023 09:16:44 +0000 (11:16 +0200)]
RISC-V: avoid redundant and misleading/wrong error messages

The use of a wrong (for the insn) relocation operator (or a future one
which simply isn't recognized by older gas yet) doesn't render the (rest
of the) expression "bad". Furthermore alongside the error from
expression() in most cases the parser would emit another error then
anyway. Suppress the call to my_getExpression() in such a case,
arranging for a guaranteed subsequent error message by marking the
expression "illegal".

19 months agoRISC-V: drop "percent_op" parameter from my_getOpcodeExpression()
Jan Beulich [Tue, 25 Apr 2023 09:16:07 +0000 (11:16 +0200)]
RISC-V: drop "percent_op" parameter from my_getOpcodeExpression()

Both callers check for no relocations, so there's no point parsing for
some. Have the function pass percent_op_null into
my_getSmallExpression(). Note that there's no point passing
percent_op_itype: Elsewhere, especially when processing compressed alias
insns ahead of non-alias ones, this has the effect of avoiding "bad
expression" errors when another parsing pass may follow (and succeed).
Here, however, all alternative forms of an insn type will again start
with the same O4 or O2, so avoiding errors earlier on doesn't really
help. Plus constructs with a relocation specifier (as percent_op_itype
would permit) can't be specified anyway, as the scrubber eats the
whitespace between .insn's type and the O4 or O2 expression when that
starts with % or ( - i.e. these will be seen as e.g. "i%lo(x)", and
riscv_ip() looks only for whitespace when finding the end of a mnemonic.

19 months agoRISC-V: minor effort reduction in relocation specifier parsing
Jan Beulich [Tue, 25 Apr 2023 09:15:25 +0000 (11:15 +0200)]
RISC-V: minor effort reduction in relocation specifier parsing

The sole caller of parse_relocation() has already checked for the %
prefix, so there's no need to check for it again in the strncasecmp()
and there's also no reason to make the involved string literals longer
than necessary.

19 months ago[gdb/testsuite] Fix timeout in gdb.tui/empty.exp
Tom de Vries [Tue, 25 Apr 2023 06:33:57 +0000 (08:33 +0200)]
[gdb/testsuite] Fix timeout in gdb.tui/empty.exp

In test-case gdb.tui/empty.exp we run into:
...
WARNING: timeout in accept_gdb_output
PASS: gdb.tui/empty.exp: src: 90x40: box 1
...

We timeout here in Term::resize:
...
# Due to the strange column resizing behavior, and because we
# don't care about this intermediate resize, we don't check
# the size here.
wait_for "@@ resize done $_resize_count"
...
because the string we're trying to match is split over two lines:
...
25 -----------------------------------------------------------------------------+No
26 ne No process In:                                               L??   PC: ?? @@
27 resize done 0, size = 79x40
28 (gdb)
...

Fix this by dropping the "@@ " prefix.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix timeout in gdb.tui/completion.exp
Tom de Vries [Tue, 25 Apr 2023 06:33:57 +0000 (08:33 +0200)]
[gdb/testsuite] Fix timeout in gdb.tui/completion.exp

With test-case gdb.tui/completion.exp, we run into:
...
WARNING: timeout in accept_gdb_output
PASS: gdb.tui/completion.exp: check focus completions
...

The timeout happens in this command:
...
Term::command "layout src"
...
which waits for:
- "(gdb) layout src", and then
- "(gdb) ".

Because the "layout src" command enables the TUI there's just a prompt.

Fix this by using Term::command_no_prompt_prefix.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix timeout in gdb.tui/new-layout.exp
Tom de Vries [Tue, 25 Apr 2023 06:33:57 +0000 (08:33 +0200)]
[gdb/testsuite] Fix timeout in gdb.tui/new-layout.exp

In test-case gdb.tui/new-layout.exp we run into:
...
WARNING: timeout in accept_gdb_output
PASS: gdb.tui/new-layout.exp: layout=cmd_only {cmd 1} {} {}: \
  bottom of cmd window is blank
...

The timeout happens here:
...
    Term::command "layout src"
...

Before the "layout src" command we have:
...
Screen Dump (size 80 columns x 24 rows, cursor at column 46, row 7):
    0 +-tui-layout.c-------------------------+(gdb) layout example3
    1 |       20 {                           |(gdb) layout src
    2 |       21   return 0;                 |(gdb) winheight cmd 8
    3 |       22 }                           |(gdb) layout example4
    4 |       23                             |(gdb) layout src
    5 |       24                             |(gdb) winheight cmd 8
    6 |       25                             |(gdb) layout example5
    7 |       26                             |(gdb)
    8 |       27                             |
    9 |       28                             |
   10 |       29                             |
   11 |       30                             |
   12 |       31                             |
   13 |       32                             |
   14 |       33                             |
   15 |       34                             |
   16 |       35                             |
   17 |       36                             |
   18 |       37                             |
   19 |       38                             |
   20 |       39                             |
   21 |       40                             |
   22 +--------------------------------------+
   23 exec No process In:                                                L??   PC: ??
...
and after:
...
Screen Dump (size 80 columns x 24 rows, cursor at column 6, row 16):
    0 +-tui-layout.c-----------------------------------------------------------------+
    1 |       20 {                                                                   |
    2 |       21   return 0;                                                         |
    3 |       22 }                                                                   |
    4 |       23                                                                     |
    5 |       24                                                                     |
    6 |       25                                                                     |
    7 |       26                                                                     |
    8 |       27                                                                     |
    9 |       28                                                                     |
   10 |       29                                                                     |
   11 |       30                                                                     |
   12 |       31                                                                     |
   13 |       32                                                                     |
   14 +------------------------------------------------------------------------------+
   15 exec No process In:                                                L??   PC: ??
   16 (gdb)
   17
   18
   19
   20
   21
   22
   23
...

The Term::command "layout src" is waiting to match:
- "(gdb) layout src", and then
- "(gdb) ".

The first part fails to match on a line:
...
|       26                             |(gdb) layout src
...
because it expects the prompt at the start of the line.

Fix this by allowing the prompt at the start of a window as well.

Tested by x86_64-linux.

19 months ago[gdb/testsuite] Fix timeout in gdb.tui/main.exp
Tom de Vries [Tue, 25 Apr 2023 06:33:57 +0000 (08:33 +0200)]
[gdb/testsuite] Fix timeout in gdb.tui/main.exp

With test-case gdb.tui/main.exp we run into:
...
WARNING: timeout in accept_gdb_output
PASS: gdb.tui/main.exp: show main after file
...

The problem is that this command:
...
Term::command "file [standard_output_file $testfile]"
...
tries to match "(gdb) $cmd", but due to the long file name, $cmd is split up
over two lines:
...
   16 (gdb) file /data/vries/gdb/leap-15-4/build/gdb/testsuite/outputs/gdb.tui/main/ma
   17 in
   18 Reading symbols from /data/vries/gdb/leap-15-4/build/gdb/testsuite/outputs/gdb.t
   19 ui/main/main...
   20 (gdb)
...

Fix this by matching "Reading symbols from" instead.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix timeout in gdb.tui/corefile-run.exp
Tom de Vries [Tue, 25 Apr 2023 06:33:57 +0000 (08:33 +0200)]
[gdb/testsuite] Fix timeout in gdb.tui/corefile-run.exp

With test-case gdb.tui/corefile-run.exp we run into:
...
WARNING: timeout in accept_gdb_output
PASS: gdb.tui/corefile-run.exp: load corefile
...

The timeout happens in this command:
...
Term::command "core-file $core"
...
because it tries to match "(gdb) $cmd" but $cmd is split over two lines:
...
   16 (gdb) core-file /data/vries/gdb/leap-15-4/build/gdb/testsuite/outputs/gdb.tui/co
   17 refile-run/corefile-run.core
   18 [New LWP 5370]
   19 Core was generated by `/data/vries/gdb/leap-15-4/build/gdb/testsuite/outputs/gdb
   20 .tui/corefile-run/coref'.
   21 Program terminated with signal SIGTRAP, Trace/breakpoint trap.
   22 #0  main () at tui-layout.c:21
   23 (gdb)
...

Fix this by using send_gdb "$cmd\n" and wait_for "Program terminated" instead.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Add debug prints in Term::wait_for
Tom de Vries [Tue, 25 Apr 2023 06:33:56 +0000 (08:33 +0200)]
[gdb/testsuite] Add debug prints in Term::wait_for

The semantics of wait_for are non-trivial, and a bit hard to understand
sometimes.

Add some debug prints in wait_for that make it clear:
- what regexps we're trying to match,
- what strings we compare to the regexps, and
- whether there's a match or mismatch.

I've added this ad-hoc a couple of times, and it seems that it's worth having
readily available.

The debug prints are enabled by adding DEBUG_TUI_MATCHING=1 to the
RUNTESTFLAGS:
...
$ make check RUNTESTFLAGS="gdb.tui/empty.exp DEBUG_TUI_MATCHING=1"
...

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Add warning for timeout in accept_gdb_output
Tom de Vries [Tue, 25 Apr 2023 06:33:56 +0000 (08:33 +0200)]
[gdb/testsuite] Add warning for timeout in accept_gdb_output

In accept_gdb_output we have:
...
            timeout {
                # Assume a timeout means we somehow missed the
                # expected result, and carry on.
                return 0
            }
...

The timeout is silent, and though in some places the return value is checked,
this is not done consistently, and consequently there are silent timeouts
when running the TUI testsuite (gdb.tui/*.exp and gdb.python/tui*.exp).

Each timeout is 10 seconds, and there are 5 in total in the TUI tests, taking
50 seconds overall:
...
real    1m0.275s
user    0m10.440s
sys     0m1.343s
...

With an entire testsuite run taking about 30 minutes, that is about 2.5% of
the time spent waiting in TUI tests.

Let's make the timeouts visible using a warning, such that they can be fixed.

Tested on x86_64-linux.

19 months agoAutomatic date update in version.in
GDB Administrator [Tue, 25 Apr 2023 00:00:29 +0000 (00:00 +0000)]
Automatic date update in version.in

19 months ago[gdb/testsuite] Fix auto-indent in gdb.gdb/python-helper.exp
Tom de Vries [Mon, 24 Apr 2023 20:08:53 +0000 (22:08 +0200)]
[gdb/testsuite] Fix auto-indent in gdb.gdb/python-helper.exp

When editing gdb.gdb/python-helper.exp, auto-indent is broken in my editor
(emacs).

The problem is that this:
...
if { 1 } {
    foo "{" "}"<ENTER>bar
}
...
produces this:
...
if { 1 } {
    foo "{" "}"
bar
}
...

Note that this doesn't happen for "{}".

Fix this by using "\{" and "\}".

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix gdb.gdb/python-helper.exp with -O2 -flto
Tom de Vries [Mon, 24 Apr 2023 20:08:53 +0000 (22:08 +0200)]
[gdb/testsuite] Fix gdb.gdb/python-helper.exp with -O2 -flto

On openSUSE Leap 15.4, with gcc 7.5.0, when building gdb with
-O2 -g -flto=auto, I run into:
...
FAIL: gdb.gdb/python-helper.exp: hit breakpoint in outer gdb
FAIL: gdb.gdb/python-helper.exp: print integer from DWARF info
FAIL: gdb.gdb/python-helper.exp: print *type->main_type
...

Fix the first two FAILs by using $bkptno_numopt_re.

The last FAIL is due to:
...
(outer-gdb) print *type->main_type^M
A syntax error in expression, near `->main_type'.^M
(outer-gdb) FAIL: gdb.gdb/python-helper.exp: print *type->main_type
...
because:
...
(outer-gdb) print type^M
Attempt to use a type name as an expression^M
...

Fix this by making the test unresolved if "print type" or
"print type->main_type" doesn't succeed.

On openSUSE Tumbleweed, with gcc 13.0.1, when building gdb with
-O2 -g -flto=auto, I run into timeouts due to the breakpoint in c_print_type
not hitting.  Fix this by detecting the situation and bailing out.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix -wrap in presence of -prompt in gdb_test_multiple
Tom de Vries [Mon, 24 Apr 2023 20:08:53 +0000 (22:08 +0200)]
[gdb/testsuite] Fix -wrap in presence of -prompt in gdb_test_multiple

While writing a gdb_test_multiple call in a test-case I tried to use -wrap in
combination with -prompt and found out that it doesn't work, because -wrap uses
"$gdb_prompt $" instead of $prompt_regexp.

Fix this by making -wrap use $prompt_regexp.

Tested on x86_64-linux.

19 months agogdb: remove end_stepping_range observable
Simon Marchi [Mon, 24 Apr 2023 19:46:00 +0000 (15:46 -0400)]
gdb: remove end_stepping_range observable

I noticed that this observable was never notified, which means we can
probably safely remove it.  The notification was removed in:

    commit 243a925328f8e3184b2356bee497181049c0174f
    Author: Pedro Alves <palves@redhat.com>
    Date:   Wed Sep 9 18:23:24 2015 +0100

        Replace "struct continuation" mechanism by something more extensible

print_end_stepping_range_reason in turn becomes unused, so remote it as
well.

Change-Id: If5da5149276c282d2540097c8c4327ce0f70431a

19 months ago[gdb/testsuite] Use -std=gnu99 for gdb.server/attach-flag.exp
Tom de Vries [Mon, 24 Apr 2023 13:02:59 +0000 (15:02 +0200)]
[gdb/testsuite] Use -std=gnu99 for gdb.server/attach-flag.exp

When using a compiler defaulting to -std=gnu90, we run into:
...
Running gdb.server/attach-flag.exp ...
gdb compile failed, attach-flag.c: In function 'main':
attach-flag.c:22:3: error: 'for' loop initial declarations are only allowed \
  in C99 or C11 mode
   for (int i = 0; i < NTHREADS; i++)
   ^~~
attach-flag.c:22:3: note: use option -std=c99, -std=gnu99, -std=c11 or \
  -std=gnu11 to compile your code
...

Fix this by using -std=gnu99.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Require GCC >= 5.x.x in gdb.base/utf8-identifiers.exp
Tom de Vries [Mon, 24 Apr 2023 12:48:06 +0000 (14:48 +0200)]
[gdb/testsuite] Require GCC >= 5.x.x in gdb.base/utf8-identifiers.exp

Test-case gdb.base/utf8-identifiers.exp compiles starting with GCC 5, so
require this.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Fix gdb.multi/multi-arch.exp on powerpc64le
Tom de Vries [Mon, 24 Apr 2023 12:48:06 +0000 (14:48 +0200)]
[gdb/testsuite] Fix gdb.multi/multi-arch.exp on powerpc64le

When running test-case gdb.multi/multi-arch.exp on powerpc64le-linux, I run into:
...
Running gdb/testsuite/gdb.multi/multi-arch.exp ...
gdb compile failed, In file included from /usr/include/features.h:399:0,
                 from /usr/include/stdio.h:27,
                 from gdb/testsuite/gdb.multi/hangout.c:18:
/usr/include/gnu/stubs.h:8:27: fatal error: gnu/stubs-32.h: \
  No such file or directory
 # include <gnu/stubs-32.h>
                           ^
compilation terminated.
...

The problem is that the test-case attempts to use gcc -m32 to produce an
executable while that's not available.

Fix this by:
- introduce a new caching proc have_compile_and_link_flag, and
- using have_compile_and_link_flag in test-case gdb.multi/multi-arch.exp.

Tested on:
- x86_64-linux (openSUSE Leap 15.4), and
- powerpc64le-linux (CentOS-7).

19 months ago[gdb/testsuite] Add basic lmap for tcl < 8.6
Tom de Vries [Mon, 24 Apr 2023 12:48:06 +0000 (14:48 +0200)]
[gdb/testsuite] Add basic lmap for tcl < 8.6

With test-case gdb.dwarf2/dw2-abs-hi-pc.exp and tcl 8.5, I run into:
...
ERROR: tcl error sourcing gdb/testsuite/gdb.dwarf2/dw2-abs-hi-pc.exp.
ERROR: invalid command name "lmap"
    while executing
"::gdb_tcl_unknown lmap i {dw2-abs-hi-pc.c dw2-abs-hi-pc-hello.c \
  dw2-abs-hi-pc-world.c} { expr { "$srcdir/$subdir/$i" } }"
...

Fix this by adding basic lmap support for tcl version < 8.6.

Tested on x86_64-linux.

19 months ago[gdb/testsuite] Don't use string cat in gdb.dwarf2/dw2-abs-hi-pc.exp
Tom de Vries [Mon, 24 Apr 2023 12:48:06 +0000 (14:48 +0200)]
[gdb/testsuite] Don't use string cat in gdb.dwarf2/dw2-abs-hi-pc.exp

Test-case gdb.dwarf2/dw2-abs-hi-pc.exp uses string cat:
...
set sources [lmap i $sources { string cat "${srcdir}/${subdir}/" $i }]
...
but that's only supported starting tcl 8.6.

Fix this by using "expr" instead:
...
set sources [lmap i $sources { expr { "$srcdir/$subdir/$i" } }]
...

Tested on x86_64-linux.

19 months agoNew georgian translation for the bfd sub-directory
Nick Clifton [Mon, 24 Apr 2023 12:06:18 +0000 (13:06 +0100)]
New georgian translation for the bfd sub-directory

19 months agoRevert "x86: work around compiler diagnosing dangling pointer"
Alan Modra [Mon, 24 Apr 2023 11:30:00 +0000 (21:00 +0930)]
Revert "x86: work around compiler diagnosing dangling pointer"

This reverts commit 983db9932a302f9e2ae1f1d4fd7c3149560bc269.

19 months agogcc-13 i386-dis.c warning
Alan Modra [Mon, 24 Apr 2023 03:57:46 +0000 (13:27 +0930)]
gcc-13 i386-dis.c warning

opcodes/i386-dis.c: In function ‘print_insn’:
opcodes/i386-dis.c:9865:22: error: storing the address of local
variable ‘priv’ in ‘*info.private_data’ [-Werror=dangling-pointer=]

* i386-dis.c (print_insn): Clear info->private_data before
returning.

19 months agoasan: segfault in coff_mangle_symbols
Alan Modra [Mon, 24 Apr 2023 01:49:15 +0000 (11:19 +0930)]
asan: segfault in coff_mangle_symbols

The testcase managed to trigger creation of a wild pointer in
coff_slurp_symbol_table.  Stop that happening, and fix an unrelated
problem I happened to see in bfd_coff_get_syment.

* coff-bfd.c (bfd_coff_get_syment): Clear fix_value after
converting n_value from a pointer to an index.
* coffcode.h (coff_slurp_symbol_table <C_BSTAT>): Sanity check
symbol value before converting to a pointer.

19 months agoobjcopy of archives tidy
Alan Modra [Sat, 22 Apr 2023 06:31:02 +0000 (16:01 +0930)]
objcopy of archives tidy

This makes sure the input element bfd is closed before exiting the
loop copying elements.

* objcopy.c (copy_archive): Rename output_bfd to output_element.
Localise last_element.  Close this_element in more error cases.

19 months ago[gdb/testsuite] Skip dap tests for tcl 8.5
Tom de Vries [Mon, 24 Apr 2023 09:29:22 +0000 (11:29 +0200)]
[gdb/testsuite] Skip dap tests for tcl 8.5

When running the dap tests on a system with tcl 8.5, we run into:
...
ERROR: tcl error sourcing gdb/testsuite/gdb.dap/memory.exp.
ERROR: bad class "entier": must be alnum, alpha, ascii, control, boolean, \
  digit, double, false, graph, integer, list, lower, print, punct, space, \
  true, upper, wideinteger, wordchar, or xdigit
    while executing
"string is entier $num"
    (procedure "num" line 16)
    invoked from within
...

Fix this by:
- requiring tcl 8.6 in allow_dap_tests, and
- adding the missing require allow_dap_tests in gdb.dap/memory.exp.

Tested on x86_64-linux.

19 months agox86: work around compiler diagnosing dangling pointer
Jan Beulich [Mon, 24 Apr 2023 08:37:12 +0000 (10:37 +0200)]
x86: work around compiler diagnosing dangling pointer

For quite come time print_insn() has been storing the address of a local
variable into info->private_data. Since the compiler can't know that the
field won't be accessed again after print_insn() returns, it may kind of
legitimately diagnose this. And recent enough gcc does as of the
introduction of the fetch_error() return paths (replacing setjmp()-based
error handling).

Utilizing that neither prefix_name() nor i386_dis_printf() actually use
info->private_data, zap the pointer in fetch_error(), after having
retrieved it for local use.

19 months agoAutomatic date update in version.in
GDB Administrator [Mon, 24 Apr 2023 00:00:29 +0000 (00:00 +0000)]
Automatic date update in version.in

19 months agoMIPS: fix loongson3 llsc workaround
YunQiang Su [Thu, 23 Mar 2023 10:49:23 +0000 (18:49 +0800)]
MIPS: fix loongson3 llsc workaround

-mfix-looongson3-llsc may add sync instructions not needed on some
asm code with lots of debug info.

PR: 30153
* gas/config/tc-mips.c(fix_loongson3_llsc): clear logistic.

19 months agoMIPS: default output r6 obj if the triple is r6
YunQiang Su [Tue, 18 Apr 2023 13:49:22 +0000 (21:49 +0800)]
MIPS: default output r6 obj if the triple is r6

If the triple is mipsisa32r6* or mipsisa64r6*, ld/as should output
r6 objects by default.
The triples with vendor `img` should do same.

The examples include:
as xx.s -o xx.o
ld -r -b binary xx.dat -o xx.o

19 months agoMIPS: support mips*64 as CPU and gnuabi64 as ABI
YunQiang Su [Tue, 18 Apr 2023 13:27:04 +0000 (21:27 +0800)]
MIPS: support mips*64 as CPU and gnuabi64 as ABI

For MIPS64r6 ports, Debian as an example, `mipsisa64r6el` is
used as the cpu name in triple.
Let's recognize them by `mips*64*(el)`.

For 64bit Ports, like Debian's mips64el and mips64r6el ports,
`gnuabi64` is used as the abi section.
Let's use N64 abi by default for the triple with gnuabi64.

19 months agoLoongArch: Fix loongarch32 test fails
mengqinggang [Sun, 23 Apr 2023 01:55:46 +0000 (09:55 +0800)]
LoongArch: Fix loongarch32 test fails

Regenerated macro_op_32.d and add skip loongarch64-*-*.

gas/ChangeLog:

* testsuite/gas/loongarch/macro_op_32.d: Regenerated.

ld/ChangeLog:

* testsuite/ld-loongarch-elf/macro_op_32.d: Regenerated.

19 months agoAutomatic date update in version.in
GDB Administrator [Sun, 23 Apr 2023 00:00:31 +0000 (00:00 +0000)]
Automatic date update in version.in

19 months ago[gdb/testsuite] Remove debug prints in gdb_find_gdc
Tom de Vries [Sat, 22 Apr 2023 09:04:11 +0000 (11:04 +0200)]
[gdb/testsuite] Remove debug prints in gdb_find_gdc

When running the gdb.dlang test-cases, and forcing gdb_find_gdc to be used
rather than dejagnu's copy (mimicing what happens with an older dejagnu
without find_gdc), I run into these debug prints:
...
Tool Root: /data/vries/gdb/leap-15-4/build
CC: gdc
...

Remove these.

Tested on x86_64-linux.

19 months agogdb: Fix false match issue in skip_prologue_using_linetable
WANG Rui [Sat, 22 Apr 2023 05:50:08 +0000 (07:50 +0200)]
gdb: Fix false match issue in skip_prologue_using_linetable

[ Changes in v2:
  - rebase on trunk
  Changes in v3:
  - add test-case ]

We should exclude matches to the ending PC to prevent false matches with the
next function, as prologue_end is located at the end PC.

  <fun1>:
    0x00: ... <-- start_pc
    0x04: ...
    0x08: ... <-- breakpoint
    0x0c: ret
  <fun2>:
    0x10: ret <-- end_pc | prologue_end of fun2

Tested on x86_64-linux.

Co-Authored-By: WANG Rui <r@hev.cc> (fix, tiny change [1])
Co-Authored-By: Tom de Vries <tdevries@suse.de> (test-case)
Approved-by: Kevin Buettner <kevinb@redhat.com>
[1] https://www.gnu.org/prep/maintain/html_node/Legally-Significant.html

PR symtab/30369
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30369

19 months agoAutomatic date update in version.in
GDB Administrator [Sat, 22 Apr 2023 00:00:20 +0000 (00:00 +0000)]
Automatic date update in version.in

19 months agogdb: remove language_auto
Simon Marchi [Mon, 17 Apr 2023 16:42:46 +0000 (12:42 -0400)]
gdb: remove language_auto

I think that the language_auto enumerator and the auto_language class
can be removed.  There isn't really an "auto" language, it's only a
construct of the "set language" command to say "pick the appropriate
language automatically".  But "auto" is never the current language.  The
`current_language` points to the current effective language, and the
fact that we're in "auto language" mode is noted by the language_mode
global.

 - Change set_language to handle the "auto" (and "local", which is a
   synonym) early, instead of in the for loop.  I think it makes the two
   cases (auto vs explicit language) more clearly separated anyway.

 - Adjust add_set_language_command to hard-code the "auto" string,
   instead of using the "auto" language definition.

 - Remove auto_language, rename auto_or_unknown_language to
   unknown_language and move the bits of the existing unknown_language
   in there.

 - Remove the set_language at the end of _initialize_language.  I think
   it's not needed, because we call set_language in gdb_init, after all
   _initialize functions are called.  There is some chance that an
   _initialize function that runs after _initialize_language implicitly
   depends on current_language being set, but my testsuite runs haven't
   found anything like that.

 - Use language_unknown instead of language_auto when creating a minimal
   symbol (minimal_symbol_reader::record_full).  I think that this value
   is used to indicate that we don't know the symbol of the minimal
   symbol (yet), so language_unknown makes sense to me.  Update a
   condition accordingly in ada-lang.c.  symbol_find_demangled_name also
   appears to "normalize" this value from "unknown" to "auto", remove
   that part and update the condition to just check for
   language_unknown.

Change-Id: I47bcd6c15f607d9818f2e6e413053c2dc8ec5034
Reviewed-By: Tom Tromey <tom@tromey.com>
19 months agogdb: switch "set language" to getter/setter
Simon Marchi [Mon, 17 Apr 2023 16:36:51 +0000 (12:36 -0400)]
gdb: switch "set language" to getter/setter

The `language` global variable is mostly a scratch variable used for the
setting.  The source of truth is really current_language and
language_mode (auto vs manual), which are set by the
set_language_command callback.

Switch the setting to use the add_setshow_enum_cmd overload that takes a
value getter and setter.

Change-Id: Ief5b2f93fd7337eed7ec96023639ae3dfe62250b
Reviewed-By: Tom Tromey <tom@tromey.com>
19 months agogdb: remove return value of set_language
Simon Marchi [Fri, 14 Apr 2023 18:31:44 +0000 (14:31 -0400)]
gdb: remove return value of set_language

set_language returns the previous language, but nothing uses it.  Remove
the return value.  This lets us remove the assignment to
current_language, in _initialize_language.

Change-Id: Ifccf9b488434c1addf4626130a74e159a37d8c17
Reviewed-By: Tom Tromey <tom@tromey.com>
19 months ago[gdb/testsuite] Add make-check-all.sh
Tom de Vries [Fri, 21 Apr 2023 15:40:22 +0000 (17:40 +0200)]
[gdb/testsuite] Add make-check-all.sh

Directory gdb/testsuite/boards contains a number of host/target boards, which
run a test-case (or test-cases) in a different way.

The benefits of using these boards are:
- improving test coverage of gdb,
- making the testsuite more robust, and
- making sure the test-cases work for non-native and remote setups, if
  possible.

Each board is slightly different, and developers need to learn how to use each
one, what parameters to pass and how, and which ones can be used in
combination with each other.  This is a threshold to start using them.

And then there quite a few, so I suppose typically only a few will be used by
each developer.

Add script gdb/testsuite/make-check-all.sh, that's intended to function as a
drop-in replacement of make check, while excercising all host/target boards in
gdb/testsuite/boards.

An example of make-check-all.sh for one test-case is:
...
 $  ~/gdb/src/gdb/testsuite/make-check-all.sh gdb.base/advance.exp
 LOCAL:
 # of expected passes            8
 TARGET BOARD: cc-with-gdb-index
 # of expected passes            8
   ...
 HOST BOARD: local-remote-host-notty, TARGET BOARD: remote-stdio-gdbserver
 # of expected passes            8
 HOST/TARGET BOARD: local-remote-host-native
 # of expected passes            8
...

Shell-checked and tested on x86_64-linux.

Co-Authored-By: Simon Marchi <simon.marchi@efficios.com>
Reviewed-By: Andrew Burgess <aburgess@redhat.com>
19 months ago[gdb/cli] Add maint info screen
Tom de Vries [Fri, 21 Apr 2023 15:12:23 +0000 (17:12 +0200)]
[gdb/cli] Add maint info screen

While working on PRs tui/30337 and cli/30346 I came across various notions of
width in gdb, as reported by gdb, readline, curses and the environment
variables.

As for gdb, readline and the environment variables, the way things work
is:
- Gdb asks readline to detect screen size,
- readline sets the actual screen size in the environment variables
  COLUMNS and LINES,
- readline reports back a screen size to gdb, which may have one column
  less than the actual screen size, to deal with lack of auto-wrap.
  This becomes gdb's notion of screen size (in other words the point where
  we can expect the gdb command line to wrap),
- Gdb then explicitly sets readline's screen size, which readline itself may
  adjust to deal with lack of auto-wrap.  This becomes readlines notion
  of screen size (well, internally the unadjusted one, but it'll report back
  the adjusted one).

Add a command "maint info screen" that prints these notions, both for width
and height.

For TERM=xterm we have:
...
$ TERM=xterm gdb -ex "maint info screen"
Number of characters gdb thinks are in a line is 118.
Number of characters readline reports are in a line is 118.
Number of characters curses thinks are in a line is 118.
Number of characters environment thinks are in a line is 118 (COLUMNS).
Number of lines gdb thinks are in a page is 27.
Number of lines readline reports are in a page is 27.
Number of lines curses thinks are in a page is 27.
Number of lines environment thinks are in a page is 27 (LINES).
...

And for TERM=ansi:
...
$ TERM=ansi gdb -ex "maint info screen"
Number of characters gdb thinks are in a line is 117.
Number of characters readline reports are in a line is 116.
Number of characters curses thinks are in a line is 118.
Number of characters environment thinks are in a line is 118 (COLUMNS).
Number of lines gdb thinks are in a page is 27.
Number of lines readline reports are in a page is 27.
Number of lines curses thinks are in a page is 27.
Number of lines environment thinks are in a page is 27 (LINES).
...

[ The fact that we have "characters readline reports are in a line is 116" is
is due to gdb making readline adjust twice for the lack of auto-wrap, this is
PR cli/30346.

Likewise we can detect tui/30337 by doing a resize in TUI mode and doing
"maint info screen":
...
Number of characters characters curses thinks are in a line is 110.
Number of characters environment thinks are in a line is 111 (COLUMNS). ]

And for TERM=ansi, with width and heigth set to 0:
...
Number of characters gdb thinks are in a line is 4294967295 (unlimited).
Number of characters readline reports are in a line is 32766 (unlimited - 1).
Number of characters curses thinks are in a line is 118.
Number of characters environment thinks are in a line is 118 (COLUMNS).
Number of lines gdb thinks are in a page is 4294967295 (unlimited).
Number of lines readline reports are in a page is 32767 (unlimited).
Number of lines curses thinks are in a page is 27.
Number of lines environment thinks are in a page is 27 (LINES).
...

[ Note that when doing a resize by say maximizing or de-maximizing a terminal,
all reported values are updated, except for curses when not in TUI mode.

Maybe that means there's a bug.  If not, then maybe we should not print
the curses lines unless in TUI mode, or annotate those lines such that it's
clear that the values may be not up-to-date. ]

I'd like to use this command in the regression test for PR cli/30346.

Tested on x86_64-linux.

Reviewed-By: Eli Zaretskii <eliz@gnu.org>
Reviewed-By: Tom Tromey <tom@tromey.com>
19 months agoFix -Wmaybe-uninitialized warning in opcodes/i386-dis.c
Tom Tromey [Fri, 21 Apr 2023 13:05:53 +0000 (07:05 -0600)]
Fix -Wmaybe-uninitialized warning in opcodes/i386-dis.c

A recent change in opcodes/i386-dis.c caused a build failure on my
x86-64 Fedora 36 system, which uses:

$ gcc --version
gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-4)
[...]

The error is:

../../binutils-gdb/opcodes/i386-dis.c: In function ‘OP_J’:
../../binutils-gdb/opcodes/i386-dis.c:12705:22: error: ‘val’ may be used uninitialized [-Werror=maybe-uninitialized]
12705 |           disp = val & 0x8000 ? val - 0x10000 : val;
      |                  ~~~~^~~~~~~~

This patch fixes the warning.

opcodes/ChangeLog
2023-04-21  Tom Tromey  <tromey@adacore.com>

* i386-dis.c (OP_J): Check result of get16.

19 months agoUse entry values for 32-bit PPC struct return
Tom Tromey [Tue, 21 Feb 2023 20:49:17 +0000 (13:49 -0700)]
Use entry values for 32-bit PPC struct return

AdaCore has a local patch for PPC "finish", but last year, Ulrich
Weigand pointed out that this patch was incorrect.  It may work for
simple functions like the one in the internal test, but nothing
guarantees that r3 will be preserved by the callee, so checking r3 on
exit is not always correct.

This patch fixes the problem using the same approach as PPC64: use the
entry value of r3, if available.  Ulrich confirmed this matches the
PPC32 ABI.

19 months agoHandle erroneous DW_AT_call_return_pc
Tom Tromey [Wed, 8 Mar 2023 17:58:35 +0000 (10:58 -0700)]
Handle erroneous DW_AT_call_return_pc

On PPC64, with the test case included in an earlier patch, we found
that "finish" would still not correctly find the return value via
entry values.

The issue is simple.  The compiler emits:

   0x00000000100032b8 <+28>: bl      0x1000320c <pck__create_large>
   0x00000000100032bc <+32>: nop
   0x00000000100032c0 <+36>: li      r9,42

... but the DWARF says:

    <162a>   DW_AT_call_return_pc: 0x100032c0

That is, the declared return PC is one instruction past the actual
return PC.

This patch adds a new arch hook to handle this scenario, and
implements it for PPC64.  Some care is taken so that GDB will continue
to work if this compiler bug is fixed.  A GCC patch is here:

    https://gcc.gnu.org/pipermail/gcc-patches/2023-March/613336.html

No check for 'nop' is done, as subsequent discussion revealed that the
linker might replace this with another instruction.

19 months agoHandle function descriptors in call_site_target
Tom Tromey [Fri, 3 Mar 2023 17:29:06 +0000 (10:29 -0700)]
Handle function descriptors in call_site_target

call_site_target::iterate_over_addresses may look up a minimal symbol.
On platforms like PPC64 that use function descriptors, this may find
an unexpected address.  The fix is to use gdbarch_convert_from_func_ptr_addr
to convert from a function descriptor to the address recorded at the
call site.

I've added a new test case that is based on the internal AdaCore test
that provoked this bug.  However, I'm unable to test it as-is on
PPC64.