Jan Beulich [Fri, 5 Jan 2024 07:12:11 +0000 (08:12 +0100)]
z80: drop .bss override
It doesn't look to be a good idea to override the custom handlers that
ELF and COFF have; afaict doing so broke .previous on ELF, and a sub-
section specifier wasn't accepted either.
Jan Beulich [Fri, 5 Jan 2024 07:11:43 +0000 (08:11 +0100)]
visium: drop .bss and .skip overrides
The comment in s_bss() looks bogus (perhaps simply stale, or wrongly
copied from another target). It also doesn't look to be a good idea to
override the custom handler that ELF has (afaict doing so broke
.previous as well as sub-section specification).
The override for .skip is simply pointless, for read.c having exactly
the same.
While there also drop two adjacent redundant (with read.h) declarations
(which would be outright dangerous if read.h wasn't included anyway).
Jan Beulich [Fri, 5 Jan 2024 07:11:18 +0000 (08:11 +0100)]
v850: drop .bss override
While there doesn't look to be anything wrong with this override,
there's also no apparent reason why this override would be needed. Drop
it, reducing overall size a tiny bit.
Jan Beulich [Fri, 5 Jan 2024 07:10:21 +0000 (08:10 +0100)]
score: drop .bss override
The comment looks bogus (perhaps simply stale, or wrongly copied from
another target). It also doesn't look to be a good idea to override the
custom handler that ELF has (afaict doing so broke .previous as well as
sub-section specification).
While there also fold the identical handlers for .text (there likely is
more room for such folding).
Jan Beulich [Fri, 5 Jan 2024 07:10:01 +0000 (08:10 +0100)]
s390: drop .bss override
The comment looks bogus (perhaps simply stale), and there are also no
other precautions against subsections being used on ELF with .bss. It
also doesn't look to be a good idea to override the custom handler that
ELF has (afaict doing so further broke .previous).
Jan Beulich [Fri, 5 Jan 2024 07:09:40 +0000 (08:09 +0100)]
rx: drop .bss override
It doesn't look to be a good idea to override the custom handler that
ELF has; afaict doing so broke .previous.
Jan Beulich [Fri, 5 Jan 2024 07:09:18 +0000 (08:09 +0100)]
rl78: drop .bss override
It doesn't look to be a good idea to override the custom handler that
ELF has; afaict doing so broke .previous.
Jan Beulich [Fri, 5 Jan 2024 07:08:52 +0000 (08:08 +0100)]
pru: fix .text/.data interaction with .previous
Just like obj_elf_section() is called for .section, obj_elf_{text,data}()
need calling for .text/.data.
Jan Beulich [Fri, 5 Jan 2024 07:07:58 +0000 (08:07 +0100)]
microblaze: drop/restrict override of .text, .data, and .bss
While only ELF is supported right now, (stub) code generally is in place
for the non-ELF case as well. Don't override .bss for ELF - that's
unlikely to be a good idea anyway and prevented the sub-section
specifier from being usable. Don't override .text and .data at all - for
.data and ELF for the same reason, while for .text and ELF obj-elf.c's is
all we need, and for (hypothetical) non-ELF read.c's identical handling
would have been invoked anyway.
Jan Beulich [Fri, 5 Jan 2024 07:06:54 +0000 (08:06 +0100)]
m68k: drop .bss override
The comment looks bogus (perhaps simply stale), and there are also no
other precautions against subsections being used on ELF with .bss. It
also doesn't look to be a good idea to override the custom handler that
ELF has (afaict doing so further broke .previous).
Jan Beulich [Fri, 5 Jan 2024 07:06:35 +0000 (08:06 +0100)]
m32c: drop .bss override
It doesn't look to be a good idea to override the custom handler that
ELF has; afaict doing so broke .previous.
Jan Beulich [Fri, 5 Jan 2024 07:06:08 +0000 (08:06 +0100)]
IA64: drop .bss override
It doesn't look to be a good idea to override the custom handlers that
ELF and COFF have. While in this case interaction with ELF's .previous
wasn't screwed, the sub-section specifier wasn't permitted.
Jan Beulich [Fri, 5 Jan 2024 07:05:33 +0000 (08:05 +0100)]
d30v: fix .text/.data interaction with .previous
Just like obj_elf_section() is called for .section, obj_elf_{text,data}()
need calling for .text/.data.
Jan Beulich [Fri, 5 Jan 2024 07:05:10 +0000 (08:05 +0100)]
bfin: drop .bss override
It doesn't look to be a good idea to override the custom handler that
ELF has; afaict doing so broke .previous.
Jan Beulich [Fri, 5 Jan 2024 07:04:42 +0000 (08:04 +0100)]
Arm64: drop .bss override
The comment looks bogus (perhaps simply stale, perhaps wrongly copied
from Arm in the first place), and there are also no other precautions
against subsections being used on ELF with .bss. It also doesn't look
to be a good idea to override the custom handlers that ELF and COFF
have (afaict doing so further broke .previous on ELF).
As to the mapping state update - such also doesn't appear to be done
for other section switching, so its original purpose was at best
questionable as well.
Jan Beulich [Fri, 5 Jan 2024 07:04:18 +0000 (08:04 +0100)]
Arm: drop .bss override
The comment looks bogus (perhaps simply stale), and there are also no
other precautions against subsections being used on ELF with .bss. It
also doesn't look to be a good idea to override the custom handlers that
ELF and COFF have (afaict doing so further broke .previous on ELF).
Tamar Christina [Thu, 4 Jan 2024 15:20:14 +0000 (15:20 +0000)]
Enforce C++11 as a minimum for building gold [PR30867]
The attempt in
5e9091dab885 to correct gold for modern LLVM has broken
gold for older compilers. This commit introduced C++11 types without
changing the build system to require a C++ compiler. More importantly
it depends on the compiler having at least C++11 as the default
language. Older compilers which support C++11 but not as the default
language needlessly break. Fix that.
PR gold/30867
* configure.ac (AX_CXX_COMPILE_STDCXX): Require C++11.
* Makefile.in: Regenerate.
* aclocal.m4: Regenerate.
* config.in: Regenerate.
* configure: Regenerate.
* testsuite/Makefile.in: Regenerate.
Alan Modra [Wed, 3 Jan 2024 05:33:48 +0000 (16:03 +1030)]
loongarch: 'index' shadows global
Avoid an error when compiling with older versions of gcc.
* elfnn-loongarch.c (loongarch_relax_align): Rename "index" to
"sym_index".
Alan Modra [Sun, 31 Dec 2023 09:09:18 +0000 (19:39 +1030)]
Tidy bfd_scan_vma
In commit
83c79df86bf4 I removed configure tests for strtoull among
other library functions part of C99, but didn't remove what is now
dead code.
* bfd.c (bfd_scan_vma): Delete fall-back for strtoull.
Alan Modra [Sun, 31 Dec 2023 03:39:10 +0000 (14:09 +1030)]
PR31120, ld-scripts/fill2 fails when bfd_vma is 32 bits
The ld lexer converts strings to integers without overflow checking,
so I don't think there is any problem in truncating an integer that
exceeds the size of a bfd_vma rather than using (bfd_vma) -1.
PR 31120
* ldlex.l: Don't use bfd_scan_vma for integer conversion, use
strtoull.
Jin Ma [Thu, 4 Jan 2024 02:17:40 +0000 (10:17 +0800)]
RISC-V: T-HEAD: Fix wrong instruction encoding for th.vsetvli
Since the particularity of "th.vsetvli" was not taken into account in the
initial support patches for XTheadVector, the program operation failed
due to instruction coding errors. According to T-Head SPEC ([1]), the
"vsetvl" in the XTheadVector extension consists of SEW, LMUL and EDIV,
which is quite different from the "V" extension. Therefore, we cannot
simply reuse the processing of vsetvl in V extension.
We have set up tens of thousands of test cases to ensure that no
further encoding issues are there, and and execute all compiled test
files on real HW and make sure they don't trigger SIGILL.
Ref:
[1] https://github.com/T-head-Semi/thead-extension-spec/releases/download/2.3.0/xthead-2023-11-10-2.3.0.pdf
Co-developed-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Co-developed-by: Christoph Müllner <christoph.muellner@vrull.eu>
gas/ChangeLog:
* config/tc-riscv.c (validate_riscv_insn): Add handling for
th.vsetvli.
(my_getThVsetvliExpression): New function.
(riscv_ip): Likewise.
* testsuite/gas/riscv/x-thead-vector.d: Likewise.
* testsuite/gas/riscv/x-thead-vector.s: Likewise.
include/ChangeLog:
* opcode/riscv.h (OP_MASK_XTHEADVLMUL): New macro.
(OP_SH_XTHEADVLMUL): Likewise.
(OP_MASK_XTHEADVSEW): Likewise.
(OP_SH_XTHEADVSEW): Likewise.
(OP_MASK_XTHEADVEDIV): Likewise.
(OP_SH_XTHEADVEDIV): Likewise.
(OP_MASK_XTHEADVTYPE_RES): Likewise.
(OP_SH_XTHEADVTYPE_RES): Likewise.
opcodes/ChangeLog:
* riscv-dis.c (print_insn_args): Likewise.
* riscv-opc.c: Likewise.
GDB Administrator [Fri, 5 Jan 2024 00:02:14 +0000 (00:02 +0000)]
Automatic date update in version.in
Tom de Vries [Thu, 4 Jan 2024 12:42:45 +0000 (13:42 +0100)]
[gdb/testsuite] Handle PAC marker
On aarch64-linux, I run into:
...
FAIL: gdb.base/annota1.exp: backtrace from shlibrary (timeout)
...
due to the PAC marker showing up:
...
^Z^Zframe-address^M
0x000000000041025c [PAC]^M
^Z^Zframe-address-end^M
...
In the docs the marker is documented as follows:
...
When GDB is debugging the AArch64 architecture, and the program is using the
v8.3-A feature Pointer Authentication (PAC), then whenever the link register
$lr is pointing to an PAC function its value will be masked. When GDB prints
a backtrace, any addresses that required unmasking will be postfixed with the
marker [PAC]. When using the MI, this is printed as part of the addr_flags
field.
...
Update the test-case to allow the PAC marker.
Likewise in a few other test-cases.
While we're at it, rewrite the affected pattern pat_begin in annota1.exp into
a more readable form. Likewise for the corresponding pat_end.
Tested on aarch64-linux.
Approved-By: Luis Machado <luis.machado@arm.com>
PR testsuite/31202
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31202
Alan Modra [Thu, 4 Jan 2024 11:52:08 +0000 (22:22 +1030)]
Update year range in copyright notice of binutils files
Adds two new external authors to etc/update-copyright.py to cover
bfd/ax_tls.m4, and adds gprofng to dirs handled automatically, then
updates copyright messages as follows:
1) Update cgen/utils.scm emitted copyrights.
2) Run "etc/update-copyright.py --this-year" with an extra external
author I haven't committed, 'Kalray SA.', to cover gas testsuite
files (which should have their copyright message removed).
3) Build with --enable-maintainer-mode --enable-cgen-maint=yes.
4) Check out */po/*.pot which we don't update frequently.
Nick Clifton [Thu, 4 Jan 2024 12:00:34 +0000 (12:00 +0000)]
Synchronize config.sub and config.guess with their upstream master versions.
Brings in:
commit
28ea239c53a2d5d8800c472bc2452eaa16e37af2 config.sub: Remove windows-gnu
commit
a6976af01b0c6206561782183a0db42124b19f7b config.sub: recognise ARM64EC machine type
commit
4e60c54be77f743ff8018ab58fb36fd8bc055e2a config.sub: allow aarch64c-unknown-freebsd
commit
e4786449e1c26716e3f9ea182caf472e4dbc96e0 config.guess: invoke "uname -p" from PATH for non-arm FreeBSD
commit
021155df7fad97a5ae1baa354e15a03ea14500b4 config.guess: Detect Android (as opposed to GNU/Linux)
commit
6c78704d542cebfb56d17474fe9f8395e9defb94 config.sub: add javascript-*-ghcjs
commit
2a7c4b64d4aec5c3a8a975625f0f8c369d365667 testsuite: add coverage for vendor-clobbering
commit
39c49ea712cba8ae6613ef85ab22fe7c552b48b0 config.sub: Systematize parsing of machine code formats
commit
d4e37b5868ef910e3e52744c34408084bb13051c config.sub: Handle arbitrary MIPS CPU names
commit
af8d803a82436779d35ea389888788c78677804e config.guess (aarch64:Linux:*:*): Detect 32-bit ABI
commit
602766470c886df7ae07bcfd7dcf532f0783d3e0 Add KVX MPPA detection
commit
be68d790b6bc7dd84982fa6760f1448e92849e63 config.sub: Add Apple tvOS and watchOS
commit
998ba1414387b4ce1a519be234e1609bc7912e0c config.sub: Accept $cpu-$vendor-none-{coff,elf}
mengqinggang [Thu, 1 Dec 2022 09:23:14 +0000 (17:23 +0800)]
LoongArch: Fix linker generate PLT entry for data symbol
With old "medium" code model, we call a function with a pair of PCALAU12I
and JIRL instructions. The assembler produces something like:
8:
1a00000c pcalau12i $t0, 0
8: R_LARCH_PCALA_HI20 g
c:
4c000181 jirl $ra, $t0, 0
c: R_LARCH_PCALA_LO12 g
The linker generates a "PLT entry" for data without any diagnostic.
If "g" is a data symbol and ld with -shared option, it may load two
instructions in the PLT.
Without -shared option, loongarch_elf_adjust_dynamic_symbol can delete PLT
entry.
For R_LARCH_PCALA_HI20 relocation, linker only generate PLT entry for STT_FUNC
and STT_GNU_IFUNC symbols.
Andrew Burgess [Fri, 22 Dec 2023 11:29:13 +0000 (11:29 +0000)]
gdb: improve error reporting from expression parser
This commits changes how errors are reported from the expression
parser. Previously, parser errors were reported like this:
(gdb) p a1 +}= 432
A syntax error in expression, near `}= 432'.
(gdb) p a1 +
A syntax error in expression, near `'.
The first case is fine, a user can figure out what's going wrong, but
the second case is a little confusing; as the error occurred at the
end of the expression GDB just reports the empty string to the user.
After this commit the first case is unchanged, but the second case now
reports like this:
(gdb) p a1 +
A syntax error in expression, near the end of `a1 +'.
Which I think is clearer. There is a possible issue if the expression
being parsed is very long, GDB will repeat the whole expression. But
this issue already exists in the standard case; if the error occurs
early in a long expression GDB will repeat everything after the syntax
error. So I've not worried about this case in my new code either,
which keeps things simpler.
I did consider trying to have multi-line errors here, in the style
that gcc produces, with some kind of '~~~~~^' marker on the second
line to indicate where the error occurred; but I rejected this due to
the places in GDB where we catch an error and repackage the message
within some longer string, I don't think multi-line error messages
would work well in that case. At a minimum it would require some
significant work in order to make all our error handling multi-line
aware.
I've added a couple of extra tests in gdb.base/exprs.exp.
Approved-By: John Baldwin <jhb@FreeBSD.org>
Andrew Burgess [Tue, 2 Jan 2024 14:02:44 +0000 (14:02 +0000)]
gdb: merge error handling from different expression parsers
Many (all?) of the expression parsers implement yyerror to handle
parser errors, and all of these functions are basically identical.
This commit adds a new parser_state::parse_error() function, which
implements the common error handling code, this function can then be
called from all the different yyerror functions.
The benefit of this is that (in a future commit) I can improve the
error output, and all the expression parsers will benefit.
This commit is pure refactoring though, and so, there should be no
user visible changes after this commit.
Approved-By: John Baldwin <jhb@FreeBSD.org>
Andrew Burgess [Fri, 22 Dec 2023 11:48:54 +0000 (11:48 +0000)]
gdb: don't try to style content in error calls
While working on a later commit in this series I realised that the
error() function doesn't support output styling. Due to the way that
output from error() calls is passed around within the exception
object and often combined with other output, it's not immediately
obvious to me if we should be trying to support styling in this
context or not.
On inspection, I found one place in GDB where we apparently try to
apply styling within the error() output (in procfs.c). I suspect this
error() call might not be tested.
Rather than try to implement styling in the error() output, right now
I'm proposing to just remove the attempt to style error() output.
This doesn't mean that someone shouldn't add error() styling in the
future, but right now, I'm not planning to do that, I just wanted to
fix this in passing.
Approved-By: John Baldwin <jhb@FreeBSD.org>
Lulu Cai [Wed, 27 Dec 2023 09:10:41 +0000 (17:10 +0800)]
LoongArch: Fix loongarch*-elf target ld testsuite failure
The loongarch*-elf target does not support SHARED and PIE, so this
target is skipped for some tests that require these options.
Lulu Cai [Wed, 27 Dec 2023 11:42:01 +0000 (19:42 +0800)]
LoongArch: Fix some macro that cannot be expanded properly
Suppose we want to use la.got to generate 32 pcrel and
32 abs instruction sequences respectively. According to
the existing conditions, to generate 32 pcrel sequences
use -mabi=ilp32*, and to generate 32 abs use -mabi=ilp32*
and -mla-global-with-abs.
Due to the fact that the conditions for generating 32 abs
also satisfy 32 pcrel, using -mabi=ilp32* and -mla-global-with-abs
will result in only generating instruction sequences of 32 pcrel.
By modifying the conditions for macro expansion and adjusting
the matching order of macro instructions, it is ensured that
the correct sequence of instructions can be generated.
GDB Administrator [Thu, 4 Jan 2024 00:01:45 +0000 (00:01 +0000)]
Automatic date update in version.in
Mike Frysinger [Wed, 3 Jan 2024 08:12:42 +0000 (03:12 -0500)]
sim: ppc: unify igen filter modules
The common igen code was forked from the ppc long ago. The filter
module is still pretty similar in API, so we can unfork them with
a little bit of effort.
The filter.c module is still here because of the unique it_is API.
The common igen code doesn't seem to have an equiv API as this only
operates on two strings and not an actual filter object, and it's
easy enough to leave behind to unfork the rest.
Mike Frysinger [Wed, 3 Jan 2024 07:54:37 +0000 (02:54 -0500)]
sim: ppc: unify igen line number output modules
The common igen code was forked from the ppc long ago. The lf module
is still pretty similar in API, so we can unfork them with a little
bit of effort.
Some of the generated ppc code is now slightly different, but that's
because of fixes the common igen code has gained, but not the ppc igen
code (e.g. fixing of #line numbers).
The ppc code retains lf_print__c_code because the common igen code
rewrote the logic to a new table.c API. Let's delay that in the ppc
code to at least unfork all this code.
Mike Frysinger [Wed, 3 Jan 2024 08:07:25 +0000 (03:07 -0500)]
sim: igen: clean up headers a bit
Add standard multiple inclusion protection, and add a few missing
local includes when one header uses another. This isn't complete,
but fixes some short comings seen when merging the ppc igen.
Mike Frysinger [Wed, 3 Jan 2024 07:17:16 +0000 (02:17 -0500)]
sim: ppc: switch to common endian code
The common sim-endian is a forked & updated version of the ppc code.
Fortunately, they didn't diverge from the basic APIs, so they are
still compatible, which means we can just delete the ppc version now
that the build env is merged at the top-level.
Mike Frysinger [Wed, 3 Jan 2024 07:15:54 +0000 (02:15 -0500)]
sim: common: include sim-types.h in the endian header directly
This is a bit redundant for most ports as they go through sim-basics.h
which always includes sim-types.h before including sim-endian.h, but in
order to unify ppc's sim-endian code, we need this include here. Plus,
it's the directly we generally want to go to get away from one header
that defines all APIs and causes hard to untangle dependencies.
Mike Frysinger [Wed, 3 Jan 2024 07:13:55 +0000 (02:13 -0500)]
sim: ppc: rename local ALU SIGNED64 macros
The common/ code has macros with the same name but different behavior:
it's for declaring integer constants as 64-bit, not for casting them.
Rename ppc's local variant since it's only used in this file in order
to avoid conflicts.
Mike Frysinger [Wed, 3 Jan 2024 07:10:52 +0000 (02:10 -0500)]
sim: ppc: sync WITH_TARGET_{ADDRESS,CELL}_BITSIZE with common/
This will make it easier to share common/ code that rely on these
additional defines.
Mike Frysinger [Wed, 3 Jan 2024 06:54:57 +0000 (01:54 -0500)]
sim: cr16: cleanup unused variable compiler warnings
Mike Frysinger [Wed, 3 Jan 2024 01:26:53 +0000 (20:26 -0500)]
sim: configure: switch to m4_map
Minor reduction in boilerplate here. No real functional changes.
Mike Frysinger [Tue, 2 Jan 2024 15:23:09 +0000 (10:23 -0500)]
sim: drop support for recursive makes entirely
Now that all ports have been merged to the top-level, we no longer need
this framework to pass settings down to sub-makefiles. Delete it all.
Mike Frysinger [Tue, 2 Jan 2024 14:58:07 +0000 (09:58 -0500)]
sim: ppc: hoist compilation up to top-level
This removes all recursive makes from the ppc port.
Mike Frysinger [Tue, 2 Jan 2024 15:02:39 +0000 (10:02 -0500)]
sim: drop support for automatic subdir recursion
No port relies on this anymore, so we can scrub it all.
Mike Frysinger [Tue, 2 Jan 2024 14:50:43 +0000 (09:50 -0500)]
sim: ppc: move libsim.a creation to top-level
The objects are still compiled in the subdir, but the creation of the
archive itself is in the top-level. This is a required step before we
can move compilation itself up, and makes it easier to review.
The downside is that each object compile is a recursive make instead of
a single one. It adds some overhead, so it's not great, but it shouldn't
be a big deal. This will go away once compilation is hoisted up.
Mike Frysinger [Tue, 2 Jan 2024 13:28:34 +0000 (08:28 -0500)]
sim: ppc: move main.o compilation to top-level
mengqinggang [Wed, 3 Jan 2024 03:27:35 +0000 (11:27 +0800)]
LoongArch: delete bfd/.elfnn-loongarch.c.swp
GDB Administrator [Wed, 3 Jan 2024 00:02:14 +0000 (00:02 +0000)]
Automatic date update in version.in
Carl Love [Tue, 2 Jan 2024 22:46:12 +0000 (17:46 -0500)]
Fix GDB reverse-step and reverse-next command behavior
Currently GDB when executing in reverse over multiple statements in a single
line of source code, GDB stops in the middle of the line. Thus requiring
multiple commands to reach the previous line. GDB should stop at the first
instruction of the line, not in the middle of the line.
The following description of the incorrect behavior was taken from an
earlier message by Pedro Alves <pedro@palves.net>:
https://sourceware.org/pipermail/gdb-patches/2023-January/196110.html
---------------------------------
The source line looks like:
func1 (); func2 ();
in the test case:
(gdb) list 1
1 void func1 ()
2 {
3 }
4
5 void func2 ()
6 {
7 }
8
9 int main ()
10 {
11 func1 (); func2 ();
12 }
compiled with:
$ gcc reverse.c -o reverse -g3 -O0
$ gcc -v
...
gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04)
Now let's debug it with target record, using current gdb git master
(
f3d8ae90b236),
$ gdb ~/reverse
GNU gdb (GDB) 14.0.50.
20230124-git
...
Reading symbols from /home/pedro/reverse...
(gdb) start
Temporary breakpoint 1 at 0x1147: file reverse.c, line 11.
Starting program: /home/pedro/reverse
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Temporary breakpoint 1, main () at reverse.c:11
11 func1 (); func2 ();
(gdb) record
(gdb) disassemble /s
Dump of assembler code for function main:
reverse.c:
10 {
0x000055555555513f <+0>: endbr64
0x0000555555555143 <+4>: push %rbp
0x0000555555555144 <+5>: mov %rsp,%rbp
11 func1 (); func2 ();
=> 0x0000555555555147 <+8>: mov $0x0,%eax
0x000055555555514c <+13>: call 0x555555555129 <func1>
0x0000555555555151 <+18>: mov $0x0,%eax
0x0000555555555156 <+23>: call 0x555555555134 <func2>
0x000055555555515b <+28>: mov $0x0,%eax
12 }
0x0000555555555160 <+33>: pop %rbp
0x0000555555555161 <+34>: ret
End of assembler dump.
(gdb) n
12 }
So far so good, a "next" stepped over the whole of line 11 and stopped at
line 12.
Let's confirm where we are now:
(gdb) disassemble /s
Dump of assembler code for function main:
reverse.c:
10 {
0x000055555555513f <+0>: endbr64
0x0000555555555143 <+4>: push %rbp
0x0000555555555144 <+5>: mov %rsp,%rbp
11 func1 (); func2 ();
0x0000555555555147 <+8>: mov $0x0,%eax
0x000055555555514c <+13>: call 0x555555555129 <func1>
0x0000555555555151 <+18>: mov $0x0,%eax
0x0000555555555156 <+23>: call 0x555555555134 <func2>
0x000055555555515b <+28>: mov $0x0,%eax
12 }
=> 0x0000555555555160 <+33>: pop %rbp
0x0000555555555161 <+34>: ret
End of assembler dump.
Good, we're at the first instruction of line 12.
Now let's undo the "next", with "reverse-next":
(gdb) reverse-next
11 func1 (); func2 ();
Seemingly stopped at line 11. Let's see exactly where:
(gdb) disassemble /s
Dump of assembler code for function main:
reverse.c:
10 {
0x000055555555513f <+0>: endbr64
0x0000555555555143 <+4>: push %rbp
0x0000555555555144 <+5>: mov %rsp,%rbp
11 func1 (); func2 ();
0x0000555555555147 <+8>: mov $0x0,%eax
0x000055555555514c <+13>: call 0x555555555129 <func1>
=> 0x0000555555555151 <+18>: mov $0x0,%eax
0x0000555555555156 <+23>: call 0x555555555134 <func2>
0x000055555555515b <+28>: mov $0x0,%eax
12 }
0x0000555555555160 <+33>: pop %rbp
0x0000555555555161 <+34>: ret
End of assembler dump.
(gdb)
And lo, we stopped in the middle of line 11! That is a bug, we should have
stepped back all the way to the beginning of the line. The "reverse-next"
should have fully undone the prior "next" command.
--------------------
This patch fixes the incorrect GDB behavior by ensuring that GDB stops at
the first instruction in the line.
The test case gdb.reverse/func-map-to-same-line.exp is added to testsuite
to verify this fix when the line table information is and is not available.
Carl Love [Tue, 2 Jan 2024 22:46:02 +0000 (17:46 -0500)]
PowerPC and aarch64: Fix reverse stepping failure
When running GDB's testsuite on aarch64-linux/Ubuntu 20.04 (also spotted on
the ppc backend), there are failures in gdb.reverse/solib-precsave.exp and
gdb.reverse/solib-reverse.exp.
The failure happens around the following code:
38 b[1] = shr2(17); /* middle part two */
40 b[0] = 6; b[1] = 9; /* generic statement, end part two */
42 shr1 ("message 1\n"); /* shr1 one */
Normal execution:
- step from line 38 will land on line 40.
- step from line 40 will land on line 42.
Reverse execution:
- step from line 42 will land on line 40.
- step from line 40 will land on line 40.
- step from line 40 will land on line 38.
The problem here is that line 40 contains two contiguous but distinct
PC ranges in the line table, like so:
Line 40 - [0x7ec ~ 0x7f4]
Line 40 - [0x7f4 ~ 0x7fc]
The two distinct ranges are generated because GCC started outputting source
column information, which GDB doesn't take into account at the moment.
When stepping forward from line 40, we skip both of these ranges and land on
line 42. When stepping backward from line 42, we stop at the start PC of the
second (or first, going backwards) range of line 40.
Since we've reached ecs->event_thread->control.step_range_start, we stop
stepping backwards.
The above issues were fixed by introducing a new function that looks for
adjacent PC ranges for the same line, until we notice a line change. Then
we take that as the start PC of the range. The new start PC for the range
is used for the control.step_range_start when setting up a step range.
The test case gdb.reverse/map-to-same-line.exp is added to test the fix
for the above reverse step issues.
Patch has been tested on PowerPC, X86 and AArch64 with no regressions.
Carl Love [Tue, 2 Jan 2024 22:45:55 +0000 (17:45 -0500)]
Add gdb_compile options column-info and no-column-info
This patch adds two new options to gdb_compile to specify if the compile
should or should not generate the line table information. The
options are supported on clang and gcc version 7 and newer.
Patch has been tested on PowerPC with both gcc and clang.
Guinevere Larsen [Wed, 1 Nov 2023 16:25:32 +0000 (17:25 +0100)]
gdb/dwarf2: Add support for DW_LNS_set_epilogue_begin in line-table
This commit adds a mechanism for GDB to detect the linetable opcode
DW_LNS_set_epilogue_begin. This opcode is set by compilers to indicate
that a certain instruction marks the point where the frame is destroyed.
While the standard allows for multiple points marked with epilogue_begin
in the same function, for performance reasons, the function that
searches for the epilogue address will only find the last address that
sets this flag for a given block.
This commit also changes amd64_stack_frame_destroyed_p_1 to attempt to
use the epilogue begin directly, and only if an epilogue can't be found
will it attempt heuristics based on the current instruction.
Finally, this commit also changes the dwarf assembler to be able to emit
epilogue-begin instructions, to make it easier to test this patch
Approved-By: Tom Tromey <tom@tromey.com>
Mike Frysinger [Tue, 2 Jan 2024 07:18:53 +0000 (02:18 -0500)]
sim: ppc: hoist pk.h creation to top-level
Mike Frysinger [Tue, 2 Jan 2024 07:11:11 +0000 (02:11 -0500)]
sim: ppc: hoist hw.[ch] creation to top-level
Mike Frysinger [Tue, 2 Jan 2024 07:00:09 +0000 (02:00 -0500)]
sim: ppc: hoist igen execution to top-level
Invoke ppc's igen from the top-level like we do for all other ports.
Mike Frysinger [Tue, 2 Jan 2024 06:40:06 +0000 (01:40 -0500)]
sim: ppc: merge configure logic into top-level
Now that the ppc configure script is just namespaced options, we can
move it to ppc/acinclude.m4 and include it directly in the top-level
configure script and kill off the last subdir configure script.
Mike Frysinger [Tue, 2 Jan 2024 06:30:53 +0000 (01:30 -0500)]
sim: ppc: scope configure options to --enable-sim-ppc-xxx
To prepare for moving these into the top-level configure, namespace
then with the port name like we do with all other ports.
Mike Frysinger [Tue, 2 Jan 2024 06:13:44 +0000 (01:13 -0500)]
sim: ppc: standardize configure option processing
Switch from ad-hoc $silent checks & echo calls to standard
AC_MSG_CHECKING & AC_MSG_RESULT calls. Also delete pointless
variable setting after calling AC_MSG_ERROR.
Mike Frysinger [Tue, 2 Jan 2024 05:55:33 +0000 (00:55 -0500)]
sim: ppc: switch to AS_HELP_STRING for automatic formatting
Mike Frysinger [Tue, 2 Jan 2024 05:39:08 +0000 (00:39 -0500)]
sim: ppc: drop now unused config.in
Mike Frysinger [Tue, 2 Jan 2024 05:24:22 +0000 (00:24 -0500)]
sim: ppc: move defines.h generation to the top-level
Since we rely on the top-level config.h now, the defines.h generation
step should live here too.
Mike Frysinger [Tue, 2 Jan 2024 05:12:51 +0000 (00:12 -0500)]
sim: ppc: drop configure compiler checks
Now that the ppc script only checks configure options and sets up
variables in the Makefile from those, delete all the compile related
logic to greatly simplify the configure script.
Mike Frysinger [Tue, 2 Jan 2024 05:11:38 +0000 (00:11 -0500)]
sim: ppc: drop custom config.h header
Now that everything has moved to the top-level, we can drop the
custom ppc config.h and reuse the common one.
Mike Frysinger [Tue, 2 Jan 2024 05:10:33 +0000 (00:10 -0500)]
sim: ppc: stop including headers from gdb/
The common sim code doesn't snoop in gdb/, and the ppc code doesn't
need to either. Any common code we pull from gnulib/ now only.
Mike Frysinger [Tue, 2 Jan 2024 04:57:12 +0000 (23:57 -0500)]
sim: ppc: move termios probes to top-level
This is the last compile-time logic in the ppc subdir.
Mike Frysinger [Tue, 2 Jan 2024 04:42:45 +0000 (23:42 -0500)]
sim: ppc: switch to AC_CACHE_CHECK
This macro replaces the AC_MSG_CHECKING+AC_CACHE_VAL+AC_MSG_RESULT
which reduces the boilerplate in here a little bit.
Mike Frysinger [Tue, 2 Jan 2024 04:53:53 +0000 (23:53 -0500)]
sim: ppc: switch struct member checks to AC_CHECK_MEMBER
This covers a lot of the AC_MSG_CHECKING+AC_TRY_COMPILE+AC_MSG_RESULT
boilerplate and matches what we do in the top-level platform checks.
Mike Frysinger [Tue, 2 Jan 2024 04:37:11 +0000 (23:37 -0500)]
sim: ppc: move termio defines to config.h
Move the defines from explicit -D options to config.h defines to simplify
the build and make it easier to move to the top-level configure.
Mike Frysinger [Tue, 2 Jan 2024 04:32:29 +0000 (23:32 -0500)]
sim: ppc: move struct statfs to top-level
Mike Frysinger [Tue, 2 Jan 2024 04:22:17 +0000 (23:22 -0500)]
sim: ppc: move long long test to top-level
While the sim code doesn't utilize HAVE_LONG_LONG itself, other code
(like libiberty) seem to, so check for it in the top-level for all
ports to leverage.
Mike Frysinger [Tue, 2 Jan 2024 04:15:46 +0000 (23:15 -0500)]
sim: ppc: hoist sysv tests to top-level
Now that the sysv tests turn into config.h defines and everything
checks that, we can move the tests to the top-level and out of the
ppc subdir.
Mike Frysinger [Tue, 2 Jan 2024 01:22:45 +0000 (20:22 -0500)]
sim: ppc: always compile in the sysv sem & shm device files
Move the stub logic to the device files themselves. This makes the
configure & build logic more static which will make it easier to move
to the top-level build, and matches what we did with the common/ hw
tree already.
This also decouples the logic from the two -- in the past, you needed
both sem & shm in order to enable the device models, but now each one
is tied to its own independent knob. Practically speaking, this will
probably not make a difference, but it simplifies the build a bit.
Mike Frysinger [Tue, 2 Jan 2024 01:11:52 +0000 (20:11 -0500)]
sim: ppc: change SysV sem & shm tests to compile-time
Instead of executing code to see if SysV semaphores & shared memory
are available, switch to just a compile-time test. The system used
to compile might not match the system used to run the code wrt the
current kernel & OS settings, but the library APIs should. So move
the failures from compile-time to runtime so the program is more
portable, and works correctly even when cross-compiling.
Mike Frysinger [Tue, 2 Jan 2024 01:03:26 +0000 (20:03 -0500)]
sim: ppc: merge System V semaphores checks
Compile tests can use earlier defines, so hoist the HAVE_UNION_SEMUN
define to before the semaphore check, and use it in the test so that
we can merge the 2 versions into one.
This also defines HAVE_UNION_SEMUN even when ac_cv_sysv_sem is not
set, but that's OK as this define is only about a type existing, not
about whether the overall code is usable.
Mike Frysinger [Tue, 2 Jan 2024 00:54:10 +0000 (19:54 -0500)]
sim: ppc: fix bad AC_CACHE_CHECK call with semun
The first arg is the cache var name, and this one was typoed relative
to what the call actually set. We also don't need the manual call to
AC_MSG_RESULT as the AC_CACHE_CHECK takes care of it for us.
Mike Frysinger [Tue, 2 Jan 2024 05:27:12 +0000 (00:27 -0500)]
sim: ppc: delete unused build compile & link settings
These should have been removed as part of the ppc/igen merging into the
top-level, but they were missed. Clean up now.
GDB Administrator [Tue, 2 Jan 2024 00:00:57 +0000 (00:00 +0000)]
Automatic date update in version.in
Mike Frysinger [Mon, 1 Jan 2024 23:14:13 +0000 (18:14 -0500)]
sim: ppc: merge misc igen APIs
The common igen code provides the same misc APIs as the ppc version,
so delete the ppc code and pull in the common one. There is one
minor difference: the ppc code has a unique dumpf function. The
common code switched to lf_printf for the same functionality, but
since that requires changes throughout the igen codebase, delay that
cleanup for now so we can merge the rest.
Mike Frysinger [Mon, 1 Jan 2024 22:34:01 +0000 (17:34 -0500)]
sim: ppc: rework igen error to match common
Switch to an ERROR macro and tweak the error signature to match the
common igen version in preparation for merging the two implementations.
Mike Frysinger [Mon, 1 Jan 2024 22:28:51 +0000 (17:28 -0500)]
sim: igen: extend error to take arguments
The ppc igen error helper allows arbitrary printf calls, so extend
the common one to do the same.
Mike Frysinger [Mon, 1 Jan 2024 22:17:50 +0000 (17:17 -0500)]
sim: ppc: rename igen max_insn_bit_size
We want to avoid conflicts with the common igen enums. This should
get migrated over to the common parsing logic, but for now, switch
the name to avoid redefinition.
Mike Frysinger [Mon, 1 Jan 2024 22:09:02 +0000 (17:09 -0500)]
sim: igen: minor constify logic
Copy some improvements from the ppc igen code.
Mike Frysinger [Mon, 1 Jan 2024 21:44:50 +0000 (16:44 -0500)]
sim: ppc: unify igen filter_filename implementations
Now that both igen implementations are in the top-level, we can unify
the filter_filename implementation between them since they're the same
(literally the same code).
Mike Frysinger [Mon, 1 Jan 2024 21:32:48 +0000 (16:32 -0500)]
sim: ppc: replace filter_filename with lbasename
The lbasename function from libiberty provides the same API as this
custom function. The common/ code already made the switch, so make
the same change to the ppc code to avoid target duplication.
Mike Frysinger [Mon, 1 Jan 2024 20:48:15 +0000 (15:48 -0500)]
sim: ppc: hoist igen compilation into top-level
This simplifies the build a bit (especially for deps in port subdirs),
and avoids recursive make. This in turn speeds up the build, and lets
us reuse existing build-time vs host-time logic from Makefile.am.
Mike Frysinger [Mon, 1 Jan 2024 20:26:21 +0000 (15:26 -0500)]
sim: ppc: drop build-config.h usage
This header is only used by the igen tool, and none of the igen code
depends on the configure-time checks. Delete the logic to simplify
to prepare for moving it to the local.mk code.
Mike Frysinger [Mon, 1 Jan 2024 20:24:12 +0000 (15:24 -0500)]
sim: ppc: simplify filter_host.c logic
Switch this from a build-time generation to a static include. This
makes the build rules a bit simpler, especially as we move them to
Automake from hand-written makefiles.
Mike Frysinger [Mon, 1 Jan 2024 20:38:10 +0000 (15:38 -0500)]
sim: igen: remove libigen.a when cleaning
Mike Frysinger [Mon, 1 Jan 2024 16:04:08 +0000 (11:04 -0500)]
sim: ppc: drop unused host bitsize settings
This is never set anywhere, so it's always empty. Scrub it.
Mike Frysinger [Sun, 24 Dec 2023 10:21:30 +0000 (05:21 -0500)]
sim: frv: fix cmpb uninitialized variable usage
This code sets up the cc variable based on the comparison of other
registers, but it does so incrementally with bit operations, and it
never initializes the cc variable. Initialize it to 0 which the
cmpba insn is already doing.
Mike Frysinger [Fri, 22 Dec 2023 01:06:10 +0000 (20:06 -0500)]
sim: arm: mark local read-only arrays as static const
Move it into read-only data sections to avoid constructing them on the
stack at runtime.
Mike Frysinger [Wed, 6 Dec 2023 13:39:25 +0000 (06:39 -0700)]
sim: warnings: enable -Wunused-variable
Mike Frysinger [Tue, 19 Dec 2023 01:55:58 +0000 (20:55 -0500)]
cpu: or1k: drop unused l.swa flag
The "flag" argument isn't set/used in this insn, so drop it.
This fixes an unused variable warning in the generated sim.
Tom Tromey [Sun, 31 Dec 2023 21:55:58 +0000 (14:55 -0700)]
sim: fix pervasive typo
I noticed a typo in a sim constant. This patch fixes it.
permenant -> permanent
GDB Administrator [Mon, 1 Jan 2024 00:00:49 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Sun, 31 Dec 2023 23:36:44 +0000 (16:36 -0700)]
Run 'black' on tui-window.py
Mark pointed out that a recent patch of mine caused the buildbot to
complain about the formatting of some Python test code. This patch
re-runs 'black' to fix the problem.
Tom de Vries [Sun, 31 Dec 2023 08:39:45 +0000 (09:39 +0100)]
[gdb/testsuite] Fix typo in gdb.base/catch-syscall.exp
On aarch64-linux with a gdb build without libexpat, I run into:
...
(gdb) PASS: gdb.base/catch-syscall.exp: determine pipe syscall: \
catch syscall 59
continue
Continuing.
Catchpoint 5 (call to syscall 59), 0x0000fffff7e04578 in pipe () from \
/lib64/libc.so.6
(gdb) FAIL: gdb.base/catch-syscall.exp: determine pipe syscall: continue
...
In the test-case, this pattern handles either the syscall name or number for
the pipe syscall:
...
-re -wrap "Catchpoint $decimal \\(call to syscall (pipe|$SYS_pipe)\\).*" {
...
but the pattern for the pipe2 syscall mistakenly uses SYS_pipe instead of
SYS_pipe2:
...
-re -wrap "Catchpoint $decimal \\(call to syscall (pipe2|$SYS_pipe)\\).*" {
...
and consequently doesn't handle the pipe2 syscall number.
Fix the typo by using SYS_pipe2 instead.
Tested on aarch64-linux.
GDB Administrator [Sun, 31 Dec 2023 00:00:10 +0000 (00:00 +0000)]
Automatic date update in version.in
Tom Tromey [Wed, 13 Dec 2023 05:49:52 +0000 (22:49 -0700)]
Add keywords to TuiWindow.write
The gdb docs promise that methods with more than two or more arguments
will accept keywords. However, I found that TuiWindow.write didn't
allow them. This patch adds the missing support.
Tom de Vries [Sat, 30 Dec 2023 19:04:10 +0000 (20:04 +0100)]
[gdb/testsuite] Fix gdb.base/gdb-index-err.exp for root user
When running test-case gdb.base/gdb-index-err.exp in a container as root user,
I run into:
...
FAIL: gdb.base/gdb-index-err.exp: flag=: \
try to write index to a non-writable directory
FAIL: gdb.base/gdb-index-err.exp: flag=-dwarf-5: \
try to write index to a non-writable directory
...
The test-case creates a directory without write permissions:
...
$ ls -ald private
dr-xr-xr-x 2 root root 4096 Dec 29 06:26 private/
...
but apparently the root user is still able to write in it.
Fix this by making the test unsupported for the root user.
Tested on x86_64-linux.
Reviewed-By: Lancelot SIX <lancelot.six@amd.com>
PR testsuite/31197
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31197