Hannes Domani [Wed, 22 Apr 2020 17:05:07 +0000 (19:05 +0200)]
Fix search of large memory area in gdbserver
If the search area is bigger than SEARCH_CHUNK_SIZE (16000), then you get
an error in gdbserver:
gdb: (gdb) find /w 0x3c43f0,+20000,0x04030201
gdb: Pattern not found.
gdbserver: Unable to access 3997 bytes of target memory at 0x3c8273, halting search.
The return value of any additional gdb_read_memory calls were compared with the
wrong value, this fixes it.
gdbserver/ChangeLog:
2020-04-22 Hannes Domani <ssbssa@yahoo.de>
* server.cc (handle_search_memory_1): Fix gdb_read_memory return value
comparison.
Alan Modra [Wed, 22 Apr 2020 02:22:13 +0000 (11:52 +0930)]
.symver fixes
* config/obj-elf.c (elf_frob_symbol): Unconditionally remove
symbol for ".symver .. remove".
* doc/as.texi (.symver): Update.
* testsuite/gas/symver/symver11.s: Make foo weak.
* testsuite/gas/symver/symver11.d: Expect an error.
* testsuite/gas/symver/symver7.d: Allow other random symbols.
Tom de Vries [Wed, 22 Apr 2020 12:38:35 +0000 (14:38 +0200)]
[gdb/testsuite] Fix .debug_ranges in gdb.mi/dw2-ref-missing-frame-func.c
While investigating PR25862 (an assertion failure with target board
cc-with-debug-names), I noticed that the .debug_aranges section in
gdb.mi/dw2-ref-missing-frame-func.c contains a hardcoded 0:
...
" .4byte 0 \n" // .Ldebug_info0 - Offset of Compilation Unit Info
...
So when looking for an address in the range 0x4004a7-0x4004bf, we should find
the CU at 0xc7:
...
Compilation Unit @ offset 0xc7:
Length: 0xba (32-bit)
Version: 2
Abbrev Offset: 0x64
Pointer Size: 4
<0><d2>: Abbrev Number: 1 (DW_TAG_compile_unit)
<d3> DW_AT_high_pc : 0x4004bf
<d7> DW_AT_low_pc : 0x4004a7
<db> DW_AT_name : file1.txt
<e5> DW_AT_producer : GNU C 3.3.3
<f1> DW_AT_language : 1 (ANSI C)
...
but instead the .debug_aranges entry points us to the CU at 0x0:
...
Length: 28
Version: 2
Offset into .debug_info: 0x0
Pointer Size: 4
Segment Size: 0
Fix this by using a label to refer to the start of the CU, similar to how
that's done for gdb.dlang/watch-loc.c in the fix for PR24522:
...
" .4byte .Lcu1_begin\n" // .Ldebug_info0 - Offset of Compilation Unit Info
...
The label marks the start of the empty .debug_info section for
dw2-ref-missing-frame-func.c, which is supposed to merge with the .debug_info
section in dw2-ref-missing-frame.S, so in order for that to work, we need to
make sure dw2-ref-missing-frame-func.o comes before dw2-ref-missing-frame.o in
the link line.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2020-04-22 Tom de Vries <tdevries@suse.de>
* gdb.mi/dw2-ref-missing-frame-func.c (.debug_aranges): Fix
debug_info_offset.
* gdb.mi/dw2-ref-missing-frame.exp: Make sure $objfuncfile comes
before $objsfile in the line line.
Alan Modra [Wed, 22 Apr 2020 05:19:39 +0000 (14:49 +0930)]
readelf: move file related static vars to filedata
The idea here is to get rid of a lot of file related static vars used
to pass data around, in order to not have stale data about one object
file persisting to the next one.
Tom de Vries [Wed, 22 Apr 2020 11:17:32 +0000 (13:17 +0200)]
[gdb/testsuite] Fix .debug_aranges in gdb.dlang/watch-loc.c
While investigating PR25862 (an assertion failure with target board
cc-with-debug-names), I noticed that the .debug_aranges section in
gdb.dlang/watch-loc.c contains a hardcoded 0x1000:
...
" .4byte _Dmain \n" // Address
" .4byte 0x1000 \n" // Length
...
Fix this by using the actual length of _Dmain, along the lines of how that
is done in gdb.mi/dw2-ref-missing-frame-func.c:
...
" .4byte _Dmain_end - _Dmain \n" // Length
...
such that the .debug_aranges entry:
...
Address Length 004004a70000000b 0000000000000000
...
matches the addresses found in the corresponding CU:
...
<2><fd>: Abbrev Number: 6 (DW_TAG_subprogram)
<fe> DW_AT_name : _Dmain
<105> DW_AT_low_pc : 0x4004a7
<10d> DW_AT_high_pc : 0x4004b2
...
With this fix the assertion failure is no longer triggered for
gdb.dlang/watch-loc.exp.
Tom de Vries [Wed, 22 Apr 2020 06:38:44 +0000 (08:38 +0200)]
[gdb/symtab] Store external var decls in psymtab
Consider a test-case consisting of source file test.c:
...
extern int aaa;
int
main (void)
{
return 0;
}
...
and test-2.c:
...
int aaa = 33;
...
compiled with debug info only for test.c:
...
$ gcc -c test.c -g; gcc -c test2.c; gcc test.o test2.o -g
...
When trying to print aaa, we get:
...
$ gdb -batch a.out -ex "print aaa"
'aaa' has unknown type; cast it to its declared type
...
but with -readnow we have:
...
$ gdb -readnow -batch a.out -ex "print aaa"
$1 = 33
...
In the -readnow case, the symbol for aaa in the full symtab has
LOC_UNRESOLVED, and the symbol type is combined with the minimal symbol
address, to read the value and print it without cast.
Without the -readnow, we create partial symbols, but the aaa decl is missing
from the partial symtabs, so we find it only in the minimal symbols, resulting
in the cast request. If the aaa decl would have been in the partial symtabs,
it would have been found, and the full symtab would have been expanded, after
which things would be as with -readnow.
The function add_partial_symbol has a comment on the LOC_UNRESOLVED +
minimal symbol addres construct at DW_TAG_variable handling:
...
else if (pdi->is_external)
{
/* Global Variable.
Don't enter into the minimal symbol tables as there is
a minimal symbol table entry from the ELF symbols already.
Enter into partial symbol table if it has a location
descriptor or a type.
If the location descriptor is missing, new_symbol will create
a LOC_UNRESOLVED symbol, the address of the variable will then
be determined from the minimal symbol table whenever the variable
is referenced.
...
but it's not triggered due to this test in scan_partial_symbols:
...
case DW_TAG_variable:
...
if (!pdi->is_declaration)
{
add_partial_symbol (pdi, cu);
}
...
Fix this in scan_partial_symbols by allowing external variable decls to be
added to the partial symtabs.
Build and reg-tested on x86_64-linux.
The patch caused this regression:
...
(gdb) print a_thread_local^M
Cannot find thread-local storage for process 0, executable file tls/tls:^M
Cannot find thread-local variables on this target^M
(gdb) FAIL: gdb.threads/tls.exp: print a_thread_local
...
while without the patch we have:
...
(gdb) print a_thread_local^M
Cannot read `a_thread_local' without registers^M
(gdb) PASS: gdb.threads/tls.exp: print a_thread_local
...
However, without the patch but with -readnow we have the same FAIL as with the
patch (filed as PR25807). In other words, the patch has the effect that we
get the same result with and without -readnow.
This can be explained as follows. Without the patch, and without -readnow, we
have two a_thread_locals, the def and the decl:
...
$ gdb -batch outputs/gdb.threads/tls/tls \
-ex "maint expand-symtabs" \
-ex "print a_thread_local" \
-ex "maint print symbols" \
| grep "a_thread_local;"
Cannot read `a_thread_local' without registers
int a_thread_local; computed at runtime
int a_thread_local; unresolved
...
while without the patch and with -readnow, we have the opposite order:
...
$ gdb -readnow -batch outputs/gdb.threads/tls/tls \
-ex "maint expand-symtabs" \
-ex "print a_thread_local" \
-ex "maint print symbols" \
| grep "a_thread_local;"
Cannot find thread-local storage for process 0, executable file tls/tls:
Cannot find thread-local variables on this target
int a_thread_local; unresolved
int a_thread_local; computed at runtime
...
With the patch we have the same order with and without -readnow, but just a
different one than before without -readnow.
Mark the "Cannot find thread-local variables on this target" variant a PR25807
kfail.
Tom de Vries [Wed, 22 Apr 2020 06:24:11 +0000 (08:24 +0200)]
[gdb/symtab] Find filename in shared psymtab
When running test-case gdb.ada/dgopt.exp with target board
unix/-flto/-O0/-flto-partition=none/-ffat-lto-objects and gcc-8, gcc-9 or
gcc-10, and the fix for PR25700, we run into this regression:
...
(gdb) list x.adb:16, 16^M
No source file named x.adb.^M
(gdb) FAIL: gdb.ada/dgopt.exp: list x.adb:16, 16
...
The reason for the failure is that without the fix for PR25700, we
have an unshared psymtab:
...
{ psymtab gdb.ada/dgopt/x.adb ((struct partial_symtab *) $hex)^M
readin no^M
fullname (null)^M
text addresses 0x0 -- 0x0^M
psymtabs_addrmap_supported yes^M
globals (none)^M
statics (none)^M
dependencies (none)^M
}^M
...
and a shared psymtab (with user field set):
...
{ psymtab gdb.ada/dgopt/x.adb ((struct partial_symtab *) $hex)^M
readin no^M
fullname (null)^M
text addresses 0x0 -- 0x0^M
psymtabs_addrmap_supported yes^M
globals (none)^M
statics (none)^M
user <artificial>@0x159a ((struct partial_symtab *) 0x37b57c0)^M
dependencies (none)^M
}^M
...
The fix for PR25700 removes the unshared psymtab.
Then when trying to find a psymtab matching x.adb in
psym_map_symtabs_matching_filename, we run into this continue for the shared
psymtab:
...
for (partial_symtab *pst : require_partial_symbols (objfile, true))
{
/* We can skip shared psymtabs here, because any file name will be
attached to the unshared psymtab. */
if (pst->user != NULL)
continue;
...
and consequently cannot find the file.
Fix this by not skipping the shared symtab in
psym_map_symtabs_matching_filename.
Tom de Vries [Wed, 22 Apr 2020 06:09:45 +0000 (08:09 +0200)]
[gdb/symtab] Don't create duplicate psymtab for forward-imported CU
Consider the executable generated for test-case gdb.dwarf2/imported-unit.exp.
When loading the executable using various tracing:
...
$ gdb \
outputs/gdb.dwarf2/imported-unit/imported-unit \
-batch \
-iex "set verbose on" \
-iex "set debug symtab-create 1"
...
Created psymtab 0x213f380 for module <artificial>@0xc7.
Created psymtab 0x20e7b00 for module imported_unit.c.
Created psymtab 0x215da20 for module imported_unit.c.
Created psymtab 0x2133630 for module elf-init.c.
Created psymtab 0x215b910 for module ../sysdeps/x86_64/crtn.S.
...
we notice that there are two psymtabs generated for imported_unit.c.
This is due to the following: in dwarf2_build_psymtabs_hard we loop over CUs
and generate partial symtabs for those, and if we encounter an import of
another CU, we also generate a partial symtab for that one, unless already
created.
This works well with backward import references:
- the imported CU is read
- then the importing CU is read
- the import is encountered, but the imported CU is already read, so
we're done.
But with forward import references, we have instead:
- the importing CU is read
- the import is encountered, and the imported CU is read
- the imported CU is read once more
Fix this by skipping already created psymtabs in the loop in
dwarf2_build_psymtabs_hard.
Tested on x86_64-linux, with native and target board
unix/-flto/-O0/-flto-partition=none/-ffat-lto-objects.
This causes this regression with the target board:
...
FAIL: gdb.ada/dgopt.exp: list x.adb:16, 16
...
which I consider a seperate PR, filed as PR25801 - "Filename of shared psymtab
is ignored".
gdb/ChangeLog:
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25700
* dwarf2/read.c (dwarf2_build_psymtabs_hard): Don't create psymtab for
CU if already created.
gdb/testsuite/ChangeLog:
2020-04-22 Tom de Vries <tdevries@suse.de>
PR symtab/25700
* gdb.dwarf2/imported-unit.exp: Verify that there's only one partial
symtab for imported_unit.c.
Gary Benson [Tue, 21 Apr 2020 15:56:09 +0000 (16:56 +0100)]
Fix compilation errors with clang in gdb.base/advance.c
Clang fails to compile the above file, with the following errors:
warning: control reaches end of non-void function [-Wreturn-type]
warning: too many arguments in call to 'func'
This prevents the following testcases from executing:
gdb.base/advance.exp
gdb.base/until-nodebug.exp
gdb/testsuite/ChangeLog:
* gdb.base/advance.c (func): New argument, to match call site.
(func2, func3): Add return statements.
gdb/infrun: switch the context before 'displaced_step_restore'
In infrun.c's 'displaced_step_fixup', as part of the 'finish_step_over'
flow, switch to the eventing thread *before* calling
'displaced_step_restore', because down in the flow ptid-dependent
memory accesses are used via current_inferior() and current_top_target().
Without this patch, the problem is exposed with the scenario below:
$ gdb -q
(gdb) maint set target-non-stop on
(gdb) file a.out
Reading symbols from a.out...
(gdb) set remote exec-file a.out
(gdb) target extended-remote | gdbserver --once --multi -
...
(gdb) add-inferior
[New inferior 2]
Added inferior 2 on connection 1 (extended-remote ...)
(gdb) inferior 2
[Switching to inferior 2 [<null>] (<noexec>)]
(gdb) file a.out
Reading symbols from a.out...
(gdb) set remote exec-file a.out
(gdb) run
...
Cannot access memory at address 0x555555555042
(gdb)
The problem is, down inside 'displaced_step_restore', GDB wants to
access the memory for inferior 2 because of an internal breakpoint.
However, the current inferior and inferior_ptid are out of sync.
While inferior_ptid correctly points to the process of inf 2 that was
just started, current_inferior points to inf 1. Then, the attempt to
access the memory fails, because target_has_execution results in false
since inf 1 was not started. I was not able to simplify the failing
scenario, but it shows the problem.
After this patch, we get
... same steps above...
(gdb) run
...
[Inferior 2 (process 28652) exited normally]
(gdb)
Regression-tested on X86_64 Linux with `make check`s default board file
and also `--target_board=native-extended-gdbserver`. In fact, the bug
fixed by this patch was exposed when using the native-extended-gdbserver
board file.
gdb/ChangeLog:
2020-04-21 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* infrun.c (displaced_step_fixup): Switch to the event_thread
before calling displaced_step_restore, not after.
gdb/testsuite/ChangeLog:
2020-04-21 Tankut Baris Aktemur <tankut.baris.aktemur@intel.com>
* gdb.multi/run-only-second-inf.c: New file.
* gdb.multi/run-only-second-inf.exp: New file.
Andreas Schwab [Sat, 18 Apr 2020 12:32:39 +0000 (14:32 +0200)]
Disallow PC relative for CMPI on MC68000/10
The MC68000/10 decodes the second operand of CMPI strictly as destination
operand, which disallows PC relative addressing, even though the insn
doesn't write to the operand. This restriction has only been lifted for
the MC68020+ and CPU32.
opcodes:
PR 25848
* m68k-opc.c (m68k_opcodes): Allow pc-rel for second operand of
cmpi only on m68020up and cpu32.
gas:
PR 25848
* testsuite/gas/m68k/operands.s: Add tests for cmpi.
* testsuite/gas/m68k/operands.d: Update.
* testsuite/gas/m68k/op68000.d: Update for new error messages.
Tamar Christina [Tue, 21 Apr 2020 14:16:21 +0000 (15:16 +0100)]
BFD: Exclude sections with no content from compress check.
The check in bfd_get_full_section_contents is trying to check that we don't
allocate more space for a section than the size of the section is on disk.
Previously we excluded linker created sections since they didn't have a size on
disk. However we also need to exclude sections with no content as well such as
the BSS section. Space for these would not have been allocated by the assembler
and so the check would incorrectly fail.
bfd/ChangeLog:
PR binutils/24753
* compress.c (bfd_get_full_section_contents): Exclude sections with no
content.
gas/ChangeLog:
PR binutils/24753
* testsuite/gas/arm/pr24753.d: New test.
* testsuite/gas/arm/pr24753.s: New test.
Markus Metzger [Fri, 13 Mar 2020 07:52:49 +0000 (08:52 +0100)]
gdb, btrace: make record-btrace per-inferior
When there is more than one inferior, the "record btrace" command should
only apply to the current inferior.
gdb/ChangeLog:
2020-03-19 Markus Metzger <markus.t.metzger@intel.com>
* record-btrace.c (record_btrace_enable_warn): Ignore thread if
its inferior is not recorded by us.
(record_btrace_target_open): Replace call to all_non_exited_threads ()
with call to current_inferior ()->non_exited_threads ().
(record_btrace_target::stop_recording): Likewise.
(record_btrace_target::close): Likewise.
(record_btrace_target::wait): Likewise.
(record_btrace_target::record_stop_replaying): Likewise.
gdb/testsuite/ChangeLog:
2020-03-19 Markus Metzger <markus.t.metzger@intel.com>
* gdb.btrace/multi-inferior.c: New test.
* gdb.btrace/multi-inferior.exp: New file.
Markus Metzger [Fri, 13 Mar 2020 08:58:10 +0000 (09:58 +0100)]
gdb, btrace: diagnose double and failed enable
GDB silently ignores attempts to enable branch tracing on a thread that is
already recorded. This shouldn't happen as recording is enabled exactly
once:
- when the btrace record target is opened for existing threads
- when a new thread is added while the btrace record target is pushed
GDB also silently ignores if recording is disabled on threads that were not
recorded. This shouldn't happen, either, since when stopping recording,
we only disable recording on threads that were recorded.
GDB further silently ignores if recording was not enabled by the
corresponding target method. Also this shouldn't happen since the target
is supposed to already throw an error if recording cannot be enabled.
This new error in btrace_enable catches cases where the target silently
failed to enable recording.
Throw an error in those cases.
This allows us to detect an actual issue more easily. It will be
addressed in the next patch.
gdb/ChangeLog:
2020-03-19 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (btrace_enable): Throw an error on double enables and
when enabling recording fails.
(btrace_disable): Throw an error if the thread is not recorded.
Markus Metzger [Wed, 18 Mar 2020 09:53:41 +0000 (10:53 +0100)]
gdb, btrace: forward fetch_registers for unknown threads
In the record-btrace target, while replaying, we can only provide the PC
register. The btrace state is stored in the thread_info. So, when trying
to determine whether we are currently replaying, GDB calls
find_thread_ptid() to obtain the thread_info. It also asserts that we do
have a thread_info.
For new threads, libthread-db may fetch registers before the thread is
known to GDB. In this case, find_thread_ptid() returns nullptr and the
assertion fails.
Forward the fetch_registers request to the target beneath in that case.
gdb/ChangeLog:
2020-03-19 Markus Metzger <markus.t.metzger@intel.com>
* record-btrace.c (record_btrace_target::fetch_registers): Forward
request if we do not have a thread_info.
gdb/testsuite/ChangeLog:
2020-03-19 Markus Metzger <markus.t.metzger@intel.com>
* gdb.btrace/enable-new-thread.c: New test.
* gdb.btrace/enable-new-thread.exp: New file.
Tom de Vries [Tue, 21 Apr 2020 13:45:57 +0000 (15:45 +0200)]
[gdb] Fix hang after ext sigkill
Consider the test-case from this patch, compiled with pthread support:
...
$ gcc gdb/testsuite/gdb.threads/killed-outside.c -lpthread -g
...
After running to all_started, we can print pid:
...
$ gdb a.out -ex "b all_started" -ex run -ex "delete 1" -ex "p pid"
...
Reading symbols from a.out...
Breakpoint 1 at 0x40072b: file killed-outside.c, line 29.
Starting program: /data/gdb_versions/devel/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
[New Thread 0x7ffff77fc700 (LWP 3155)]
Thread 1 "a.out" hit Breakpoint 1, all_started () at killed-outside.c:29
29 }
$1 = 3151
(gdb)
...
If we then kill the inferior using an external SIGKILL:
...
(gdb) shell kill -9 3151
...
and subsequently continue:
...
(gdb) c
Continuing.
Couldn't get registers: No such process.
Couldn't get registers: No such process.
(gdb) Couldn't get registers: No such process.
(gdb) Couldn't get registers: No such process.
(gdb) Couldn't get registers: No such process.
<repeat>
...
gdb hangs repeating the same warning. Typing control-C no longer helps,
and we have to kill gdb.
This is a regression since commit 873657b9e8 "Preserve selected thread in
all-stop w/ background execution". The commit adds a
scoped_restore_current_thread typed variable restore_thread to
fetch_inferior_event, and the hang is caused by the constructor throwing an
exception.
Fix this by catching the exception in the constructor.
Build and reg-tested on x86_64-linux.
gdb/ChangeLog:
2020-04-21 Tom de Vries <tdevries@suse.de>
PR gdb/25471
* thread.c
(scoped_restore_current_thread::scoped_restore_current_thread): Catch
exception in get_frame_id.
gdb/testsuite/ChangeLog:
2020-04-21 Tom de Vries <tdevries@suse.de>
PR gdb/25471
* gdb.threads/killed-outside.c: New test.
* gdb.threads/killed-outside.exp: New file.
Mihails Strasuns [Fri, 14 Feb 2020 10:33:41 +0000 (11:33 +0100)]
[gdb/testsuite] share jit-protocol.h by all jit tests
There was an existing jit-protocol.h defining common symbols needed for
JIT-supporting application, however, it was only used by few tests.
Others redeclared the same symbols.
This unifies all tests to use jit-protocol.h
gdb/testsuite/ChangeLog:
2020-02-18 Mihails Strasuns <mihails.strasuns@intel.com>
* gdb.base/jit-attach-pie.c: Use jit-protocol.h.
* gdb.base/jit-elf-main.c: Use jit-protocol.h.
* gdb.base/jit-reader-host.c: Use jit-protocol.h.
* gdb.base/jit-reader-simple-jit.c: Use jit-protocol.h.
* gdb.base/jit-protocol.h: Update definitions to match all usage
contexts.
Mihails Strasuns [Tue, 11 Feb 2020 12:23:25 +0000 (13:23 +0100)]
[gdb/testsuite] structured rename of jit test files
Reorganizes how JIT related test files to be more clear what are related
to JIT reader system tests and what use JIT from ELF objfiles. Those two
approaches are quite different in GDB implementation and require very
different test setup. Keeping distinction clear at the file name level
makes it easier to maintain the testsuite.
gdb/testsuite/ChangeLog:
2020-02-18 Mihails Strasuns <mihails.strasuns@intel.com>
* gdb.base: Rename all jit related test and source files.
H.J. Lu [Tue, 21 Apr 2020 12:33:04 +0000 (05:33 -0700)]
gas: Extend .symver directive
Extend .symver directive to update visibility of the original symbol and
assign one original symbol to different versioned symbols:
.symver foo, foo@VERS_1, local # Change foo to a local symbol.
.symver foo, foo@VERS_2, hidden # Change foo to a hidden symbol.
.symver foo, foo@@VERS_3, remove # Remove foo from symbol table.
.symver foo, bar@V1 # Assign foo to bar@V1 and baz@V2.
.symver foo, baz@V2
PR gas/23840
PR gas/25295
* NEWS: Mention .symver extension.
* config/obj-elf.c (obj_elf_find_and_add_versioned_name): New
function.
(obj_elf_symver): Call obj_elf_find_and_add_versioned_name to
add a version name. Add local, hidden and remove visibility
support.
(elf_frob_symbol): Handle the list of version names. Update the
original symbol to local, hidden or remove it from the symbol
table.
(elf_frob_file_before_adjust): Handle the list of version names.
* config/obj-elf.h (elf_visibility): New.
(elf_versioned_name_list): Likewise.
(elf_obj_sy): Change local to bitfield. Add rename, bad_version
and visibility. Change versioned_name pointer to struct
elf_versioned_name_list.
* doc/as.texi: Update .symver directive.
* testsuite/gas/symver/symver.exp: Run all *.d tests. Add more
error checking tests.
* testsuite/gas/symver/symver6.d: New file.
* testsuite/gas/symver/symver7.d: Likewise.
* testsuite/gas/symver/symver7.s: Likewise.
* testsuite/gas/symver/symver8.d: Likewise.
* testsuite/gas/symver/symver8.s: Likewise.
* testsuite/gas/symver/symver9.s: Likewise.
* testsuite/gas/symver/symver9a.d: Likewise.
* testsuite/gas/symver/symver9b.d: Likewise.
* testsuite/gas/symver/symver10.s: Likewise.
* testsuite/gas/symver/symver10a.d: Likewise.
* testsuite/gas/symver/symver10b.d: Likewise.
* testsuite/gas/symver/symver11.d: Likewise.
* testsuite/gas/symver/symver11.s: Likewise.
* testsuite/gas/symver/symver12.d: Likewise.
* testsuite/gas/symver/symver12.s: Likewise.
* testsuite/gas/symver/symver13.d: Likewise.
* testsuite/gas/symver/symver13.s: Likewise.
* testsuite/gas/symver/symver14.d: Likewise.
* testsuite/gas/symver/symver14.l: Likewise.
* testsuite/gas/symver/symver15.d: Likewise.
* testsuite/gas/symver/symver15.l: Likewise.
* testsuite/gas/symver/symver6.l: Removed.
* testsuite/gas/symver/symver6.s: Updated.
H.J. Lu [Tue, 21 Apr 2020 12:23:51 +0000 (05:23 -0700)]
elf: Strip zero-sized dynamic sections
ELF size_dynamic_sections is called by the ELF backend linker after all
the linker input files have been seen but before the section sizes have
been set. After the sections sizes have been set, target-specific,
global optimizations may make some dynamic sections zero-sized if they
are no longer needed.
Add ELF strip_zero_sized_dynamic_sections so that ELF backend linker can
strip zero-sized dynamic sections after the sections sizes have been set.
bfd/
PR ld/25849
* elf-bfd.h (elf_backend_data): Add
elf_backend_strip_zero_sized_dynamic_sections.
(_bfd_elf_strip_zero_sized_dynamic_sections): New prototype.
* elf64-alpha.c (elf_backend_strip_zero_sized_dynamic_sections):
New macro.
* elflink.c (_bfd_elf_strip_zero_sized_dynamic_sections): New
function.
* elfxx-target.h (elf_backend_strip_zero_sized_dynamic_sections):
New macro.
(elfNN_bed): Add elf_backend_strip_zero_sized_dynamic_sections.
H.J. Lu [Tue, 21 Apr 2020 12:20:11 +0000 (05:20 -0700)]
alpha: Warn DT_TEXTREL with -M
This fixes:
FAIL: DT_TEXTREL map file warning
* elf64-alpha.c (alpha_elf_reloc_entry): Replace reltext with
sec.
(elf64_alpha_check_relocs): Set sec instead of reltext. Warn
DT_TEXTREL with -M.
(elf64_alpha_calc_dynrel_sizes): Warn DT_TEXTREL with -M.
Alan Modra [Tue, 21 Apr 2020 01:36:53 +0000 (11:06 +0930)]
Remove SH-5 remnants
git commit 211dc24b87 removed most sh5 and sh64 SuperH support, after
they were obsoleted by git commit 2b213129c5. This patch removes a
few remaining pieces that should have gone with 211dc24b87.
Tom Tromey [Mon, 20 Apr 2020 17:45:06 +0000 (11:45 -0600)]
Mark move constructors as "noexcept"
I recently learned that move constructors generally should be marked
"noexcept". This ensures that standard containers will move objects
when possible, rather than copy them.
This patch fixes the cases I could find. Note that implicitly-defined
or defaulted move constructors will automatically do what you'd
expect; that is, they are noexcept if all the members have noexcept
move constructors.
While doing this, I noticed a couple of odd cases where the move
constructor seemed to assume that the object being constructed could
have state requiring destruction. I've fixed these as well. See
completion_result and scoped_mmap.
gdb/ChangeLog
2020-04-20 Tom Tromey <tromey@adacore.com>
* python/python.c (struct gdbpy_event): Mark move constructor as
noexcept.
* python/py-tui.c (class gdbpy_tui_window_maker): Mark move
constructor as noexcept.
* completer.h (struct completion_result): Mark move constructor as
noexcept.
* completer.c (completion_result::completion_result): Use
initialization style. Don't call reset_match_list.
gdbsupport/ChangeLog
2020-04-20 Tom Tromey <tromey@adacore.com>
* scoped_mmap.h (scoped_mmap): Mark move constructor as noexcept.
Use initialization style. Don't call destroy.
* scoped_fd.h (class scoped_fd): Mark move constructor as
noexcept.
* gdb_ref_ptr.h (class ref_ptr): Mark move constructor as
noexcept.
Gary Benson [Mon, 20 Apr 2020 16:00:47 +0000 (17:00 +0100)]
Use support_nested_function_tests in gdb.base/nested-subp1.exp et al
This commit updates gdb.base/nested-subp[1-3].exp to determine
whether whether nested functions are supported using the function
support_nested_function_tests.
gdb/testsuite/ChangeLog:
* gdb.base/nested-subp1.exp: Use support_nested_function_tests.
* gdb.base/nested-subp2.exp: Likewise.
* gdb.base/nested-subp3.exp: Likewise.
Gary Benson [Mon, 20 Apr 2020 14:05:01 +0000 (15:05 +0100)]
Fix compilation error with clang in gdb/testsuite/gdb.trace/tspeed.c
Clang fails to compile the above file, with the following error:
warning: using the result of an assignment as a condition without
parentheses [-Wparentheses]
This prevents the following testcase from executing:
gdb.trace/tspeed.exp
Stephen Casner [Mon, 20 Apr 2020 11:49:50 +0000 (12:49 +0100)]
When bfd/pdp11.c was copied from bfd/aoutx.h, the #defines for external symbol types N_TEXT etc. were #undef'd and then #define'd with new values. But N_STAB was not changed even though the new value for N_EXT overlapped with it. This caused aout_link_write_symbols() to treat global symbols referenced in the source but defined in a linker script as undefined.
Separately, in translate_symbol_table() the 16-bit symbol values were sign extended to unsigned long (e.g., 64 bits) when they really should be treated as unsigned so the value remains 16 bits.
PR 25828
* pdp11.c (N_STAB): Modify value to avoid conflict with N_EXT
causing globals from linker script to be treated as debug symbols.
(translate_symbol_table): Don't sign-extend symbol values from 16
to 64 bits in nm output.
Sudakshina Das [Mon, 20 Apr 2020 09:58:16 +0000 (10:58 +0100)]
[AArch64, Binutils] Add missing TSB instruction
This patch implements the TSB instructions:
https://developer.arm.com/docs/ddi0596/f/base-instructions-alphabetic-order/
tsb-csync-trace-synchronization-barrier
Since TSB and PSB both use the same (and only) argument "CSYNC", this patch
reuses it for TSB. However, the same argument would imply different value
for CRm:Op2 which are anyway fixed values, so I have diverted the
inserter/extracter function to dummy versions instead of the "hint" version.
The operand checker part still uses the existing infratructure for
AARCH64_OPND_BARRIER_PSB to make sure the operand is parsed correctly.
gas/ChangeLog:
2020-04-20 Sudakshina Das <sudi.das@arm.com>
* config/tc-aarch64.c (parse_barrier_psb): Update error messages
to include TSB.
* testsuite/gas/aarch64/system-2.d: Update -march and new tsb tests.
* testsuite/gas/aarch64/system-2.s: Add new tsb tests.
* testsuite/gas/aarch64/system.d: Update.
opcodes/ChangeLog:
2020-04-20 Sudakshina Das <sudi.das@arm.com>
* aarch64-asm.c (aarch64_ins_none): New.
* aarch64-asm.h (ins_none): New declaration.
* aarch64-dis.c (aarch64_ext_none): New.
* aarch64-dis.h (ext_none): New declaration.
* aarch64-opc.c (aarch64_print_operand): Update case for
AARCH64_OPND_BARRIER_PSB.
* aarch64-tbl.h (aarch64_opcode_table): Add tsb.
(AARCH64_OPERANDS): Update inserter/extracter for
AARCH64_OPND_BARRIER_PSB to use new dummy functions.
* aarch64-asm-2.c: Regenerated.
* aarch64-dis-2.c: Regenerated.
* aarch64-opc-2.c: Regenerated.
Sudakshina Das [Mon, 20 Apr 2020 09:50:52 +0000 (10:50 +0100)]
[AArch64, Binutils] Make hint space instructions valid for Armv8-a
There are a few instruction in AArch64 that are in the HINT space. Any of
these instructions should be accepted by the assembler/disassembler at any
architecture version. This patch fixes the existing instructions that are
not behaving accordingly.
I have used all of the instructions mentioned in the following to make the
changes:
https://developer.arm.com/docs/ddi0596/f/base-instructions-alphabetic-order/
hint-hint-instruction
Alan Modra [Mon, 20 Apr 2020 01:31:47 +0000 (11:01 +0930)]
readelf: segfault at readelf.c:12227
This is another one where not cleaning up sufficiently after
processing one file can lead to errors when processing the next file.
We have ngnuchains non-zero but gnuchains NULL in the following:
off < ngnuchains && (gnuchains[off] & 1) == 0
* readelf.c (process_symbol_table): Clear ngnuchains, ngnubuckets
and nbuckets.
Alan Modra [Mon, 20 Apr 2020 00:24:46 +0000 (09:54 +0930)]
readelf: segfaults fuzzing multiple object files
This patch is aimed at fixing a number of oss-fuzz segfaults that
don't reproduce reliably with their current infrastructure, the
problem being that one invocation of readelf is effectively being run
on multiple object files. I believe that these segfaults could be
reliably reproduced with just two fuzzed objects being presented to
readelf, but those inputs are currently not identified by oss-fuzz.
So there is some guesswork involved in this patch. The idea here is
to clear stashed data such as symtab_shndx_list that is processed
using section header info, at the same time that header info is
cleared.
* readelf.c (process_section_headers): Free dynamic symbols etc.
earlier.
Alan Modra [Sun, 19 Apr 2020 07:35:02 +0000 (17:05 +0930)]
readelf memory leaks
This fixes two leaks found in the new code supporting display of
dynamic symbols retrieved via dynamic tags.
* readelf.c (get_num_dynamic_syms): Formatting. Don't return
on error without freeing.
(process_dynamic_section): Don't recreate dynamic symbols from
dynamic tag info when the dynamic symbols have already been
read via section headers.
Stripping .rela.branch_lt is easy enough but messes with the
testsuite due to stub symbols (that use section id) changing. Tests
that run on more than one target variant can be tricky to fix, this
renaming happened to work.
Tom Tromey [Sun, 19 Apr 2020 01:28:13 +0000 (19:28 -0600)]
Restore some windows-tdep.c code
When I removed init_w32_command_list, I weirdly neglected to see if it
was called anywhere else. This patch restores the function, which is
called from windows-nat.c. Sorry about the breakage.
Is it possible to have a windows-native gdb that isn't also using
windows-tdep?
Anyway, I'm checking this in.
gdb/ChangeLog
2020-04-18 Tom Tromey <tom@tromey.com>
Tom Tromey [Sat, 18 Apr 2020 14:35:04 +0000 (08:35 -0600)]
Change get_objfile_arch to a method on objfile
This changes get_objfile_arch to be a new inline method,
objfile::arch.
To my surprise, this function came up while profiling DWARF psymbol
reading. Making this change improved performance from 1.986 seconds
to 1.869 seconds. Both measurements were done by taking the mean of
10 runs on a fixed copy of the gdb executable.
gdb/ChangeLog
2020-04-18 Tom Tromey <tom@tromey.com>
Add a fallback definition of PTRACE_ATTACH that is an alias of
PT_ATTACH. Change the 4th argument of ptrace(2) to 0 as it is
compatible with void * (Linux) and int (NetBSD) arguments.
Include <sys/types.h> for <sys/ptrace.h>.
gdb/testsuite/ChangeLog:
* gdb.base/attach-twice.c: Include "sys/types.h".
(PTRACE_ATTACH): Add fallback definition.
(main): Pass `0' to the 4th argument of `ptrace'.
Tom Tromey [Fri, 17 Apr 2020 13:27:14 +0000 (07:27 -0600)]
Replace most calls to help_list and cmd_show_list
Currently there are many prefix commands that do nothing but call
either help_list or cmd_show_list. I happened to notice that one such
call, for "set print type", used the wrong command list parameter,
causing incorrect output.
Rather than fix this bug in isolation, I decided to eliminate this
possibility by adding two new ways to add prefix commands, which
simply route the call to help_list or cmd_show_list, as appropriate.
This makes it impossible for a mismatch to occur.
In some cases, a bit of output was removed; however, I don't think
this output in general was very useful. It seemed redundant with
what's already printed by help_list. A representative example is this
hunk, removed from ada-lang.c:
- printf_unfiltered (_(\
-"\"set ada\" must be followed by the name of a setting.\n"));
This simplified the CLI style set/show commands quite a bit, and
allowed the deletion of a macro.
This also cleans up some unusual code in windows-tdep.c.
Tested on x86-64 Fedora 30. Note that I have no way to build the
go32-nat.c change.
gdb/ChangeLog
2020-04-17 Tom Tromey <tromey@adacore.com>
* auto-load.c (show_auto_load_cmd): Remove.
(auto_load_show_cmdlist_get): Use add_show_prefix_cmd.
* arc-tdep.c (_initialize_arc_tdep): Use add_show_prefix_cmd.
(maintenance_print_arc_command): Remove.
* tui/tui-win.c (tui_command): Remove.
(tui_get_cmd_list): Use add_basic_prefix_cmd.
* tui/tui-layout.c (tui_layout_command): Remove.
(_initialize_tui_layout): Use add_basic_prefix_cmd.
* python/python.c (user_set_python, user_show_python): Remove.
(_initialize_python): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* guile/guile.c (set_guile_command, show_guile_command): Remove.
(install_gdb_commands): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
(info_guile_command): Remove.
* dwarf2/read.c (set_dwarf_cmd, show_dwarf_cmd): Remove.
(_initialize_dwarf2_read): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* cli/cli-style.h (class cli_style_option) <add_setshow_commands>:
Remove do_set and do_show parameters.
* cli/cli-style.c (set_style, show_style): Remove.
(_initialize_cli_style): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
(cli_style_option::add_setshow_commands): Remove do_set and
do_show parameters.
(cli_style_option::add_setshow_commands): Use
add_basic_prefix_cmd, add_show_prefix_cmd.
(STYLE_ADD_SETSHOW_COMMANDS): Remove macro.
(set_style_name): Remove.
* cli/cli-dump.c (dump_command, append_command): Remove.
(srec_dump_command, ihex_dump_command, verilog_dump_command)
(tekhex_dump_command, binary_dump_command)
(binary_append_command): Remove.
(_initialize_cli_dump): Use add_basic_prefix_cmd.
* windows-tdep.c (w32_prefix_command_valid): Remove global.
(init_w32_command_list): Remove; move into ...
(_initialize_windows_tdep): ... here. Use add_basic_prefix_cmd.
* valprint.c (set_print, show_print, set_print_raw)
(show_print_raw): Remove.
(_initialize_valprint): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* typeprint.c (set_print_type, show_print_type): Remove.
(_initialize_typeprint): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* record.c (set_record_command, show_record_command): Remove.
(_initialize_record): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* cli/cli-cmds.c (_initialize_cli_cmds): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
(info_command, show_command, set_debug, show_debug): Remove.
* top.h (set_history, show_history): Don't declare.
* top.c (set_history, show_history): Remove.
* target-descriptions.c (set_tdesc_cmd, show_tdesc_cmd)
(unset_tdesc_cmd): Remove.
(_initialize_target_descriptions): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* symtab.c (info_module_command): Remove.
(_initialize_symtab): Use add_basic_prefix_cmd.
* symfile.c (overlay_command): Remove.
(_initialize_symfile): Use add_basic_prefix_cmd.
* sparc64-tdep.c (info_adi_command): Remove.
(_initialize_sparc64_adi_tdep): Use add_basic_prefix_cmd.
* sh-tdep.c (show_sh_command, set_sh_command): Remove.
(_initialize_sh_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* serial.c (serial_set_cmd, serial_show_cmd): Remove.
(_initialize_serial): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* ser-tcp.c (set_tcp_cmd, show_tcp_cmd): Remove.
(_initialize_ser_tcp): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* rs6000-tdep.c (set_powerpc_command, show_powerpc_command)
(_initialize_rs6000_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* riscv-tdep.c (show_riscv_command, set_riscv_command)
(show_debug_riscv_command, set_debug_riscv_command): Remove.
(_initialize_riscv_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* remote.c (remote_command, set_remote_cmd): Remove.
(_initialize_remote): Use add_basic_prefix_cmd.
* record-full.c (set_record_full_command)
(show_record_full_command): Remove.
(_initialize_record_full): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* record-btrace.c (cmd_set_record_btrace)
(cmd_show_record_btrace, cmd_set_record_btrace_bts)
(cmd_show_record_btrace_bts, cmd_set_record_btrace_pt)
(cmd_show_record_btrace_pt): Remove.
(_initialize_record_btrace): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* ravenscar-thread.c (set_ravenscar_command)
(show_ravenscar_command): Remove.
(_initialize_ravenscar): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* mips-tdep.c (show_mips_command, set_mips_command)
(_initialize_mips_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* maint.c (maintenance_command, maintenance_info_command)
(maintenance_check_command, maintenance_print_command)
(maintenance_set_cmd, maintenance_show_cmd): Remove.
(_initialize_maint_cmds): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
(show_per_command_cmd): Remove.
* maint-test-settings.c (maintenance_set_test_settings_cmd):
Remove.
(maintenance_show_test_settings_cmd): Remove.
(_initialize_maint_test_settings): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* maint-test-options.c (maintenance_test_options_command):
Remove.
(_initialize_maint_test_options): Use add_basic_prefix_cmd.
* macrocmd.c (macro_command): Remove
(_initialize_macrocmd): Use add_basic_prefix_cmd.
* language.c (set_check, show_check): Remove.
(_initialize_language): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* infcmd.c (unset_command): Remove.
(_initialize_infcmd): Use add_basic_prefix_cmd.
* i386-tdep.c (set_mpx_cmd, show_mpx_cmd): Remove.
(_initialize_i386_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* go32-nat.c (go32_info_dos_command): Remove.
(_initialize_go32_nat): Use add_basic_prefix_cmd.
* cli/cli-decode.c (do_prefix_cmd, add_basic_prefix_cmd)
(do_show_prefix_cmd, add_show_prefix_cmd): New functions.
* frame.c (set_backtrace_cmd, show_backtrace_cmd): Remove.
(_initialize_frame): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* dcache.c (set_dcache_command, show_dcache_command): Remove.
(_initialize_dcache): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* cp-support.c (maint_cplus_command): Remove.
(_initialize_cp_support): Use add_basic_prefix_cmd.
* btrace.c (maint_btrace_cmd, maint_btrace_set_cmd)
(maint_btrace_show_cmd, maint_btrace_pt_set_cmd)
(maint_btrace_pt_show_cmd, _initialize_btrace): Use
add_basic_prefix_cmd, add_show_prefix_cmd.
* breakpoint.c (save_command): Remove.
(_initialize_breakpoint): Use add_basic_prefix_cmd.
* arm-tdep.c (set_arm_command, show_arm_command): Remove.
(_initialize_arm_tdep): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* ada-lang.c (maint_set_ada_cmd, maint_show_ada_cmd)
(set_ada_command, show_ada_command): Remove.
(_initialize_ada_language): Use add_basic_prefix_cmd,
add_show_prefix_cmd.
* command.h (add_basic_prefix_cmd, add_show_prefix_cmd): Declare.
gdb/testsuite/ChangeLog
2020-04-17 Tom Tromey <tromey@adacore.com>
Fredrik Strupe [Fri, 17 Apr 2020 16:25:19 +0000 (17:25 +0100)]
[PATCH v2] binutils: arm: Fix disassembly of conditional VDUPs.
VDUP (neon) instructions can be conditional, but this is not taken into
account in the current master. This commit fixes that by i) fixing the
VDUP instruction masks and ii) adding logic for disassembling
conditional neon instructions.
opcodes * arm-dis.c (neon_opcodes): Fix VDUP instruction masks.
(print_insn_neon): Support disassembly of conditional
instructions.
binutils* testsuite/binutils-all/arm/vdup-cond.d: New test for testing that
conditional VDUP instructions are disassembled correctly.
* testsuite/binutils-all/arm/vdup-cond.s: New file used by
vdup-cond.d.
* testsuite/binutils-all/arm/vdup-thumb.d: New test for testing
that VDUP instructions (which are conditional in A32) can be
disassembled in thumb mode.
* testsuite/binutils-all/arm/vdup-cond.s: New file used by
vdup-thumb.d.
Nick Clifton [Fri, 17 Apr 2020 12:03:53 +0000 (13:03 +0100)]
Commit: Running the linker testsuite with clang
* testsuite/config/default.exp: If not already set then create the
CCC_OVERRIDE_OPTIONS environment variable to help when running the
testsuite with clang.
* testsuite/ld-elf/pr22269-1.c: Add a missing return statement.
* testsuite/ld-elfvers/vers.exp: Add checks to detect if files
were built before attempting to copy them.
Alan Modra [Fri, 17 Apr 2020 03:08:19 +0000 (12:38 +0930)]
bfin: allow ".=.+delta"
BFIN has lots of instructions that contain "=", so "sym = expression"
is disabled for that target. This makes an exception for assignment
to dot, fixing the recent regression of ld-scripts/pr18963.
* config/tc-bfin.h (TC_EQUAL_IN_INSN): Allow assignment to dot.
Simon Marchi [Thu, 16 Apr 2020 19:46:16 +0000 (15:46 -0400)]
gdb: is_linked_with_cygwin_dll: mention filename in warning messages
When a warning is displayed, it isn't clear to the user which file is
the cause of the warning. Add the filename in there. Remove the
"Failed to parse .idata section" part, since the .idata section is
always mentioned one way or another anyway, so it just contributes to
make the message longer than it needs to be.
gdb/ChangeLog:
* windows-tdep.c (is_linked_with_cygwin_dll): Add filename to
warning messages.
Simon Marchi [Thu, 16 Apr 2020 19:46:03 +0000 (15:46 -0400)]
gdb: is_linked_with_cygwin_dll: handle import table not at beginning of .idata section
When loading the file C:\Windows\SysWOW64\msvcrt.dll, taken from a
Windows 10 system, into GDB, we get the following warning:
warning: Failed to parse .idata section: name's virtual address (0x0) is outside .idata section's range [0xb82b8, 0xb97f0[.
This uncovers an issue with how we parse the import table, part of the
.idata section. Right now, we assume that the import table is located
at the beginning of the section. That was the case in everything I had
tried so far, but this file is an example where that's not true.
We need to compute the offset of the import table within the .idata
section, and start there, instead of at the beginning of the .idata
section. Using the file mentioned above, this is the values we have to
work with:
A) bfd_section_vma (idata_section) 101b8000
B) Import table's virtual address b82b8
C) Image base 10100000
The virtual address that BFD returns us for the section has the image
base applied, so we need to subtract it first. The offset of the table
in the section is therefore:
B - (A - C)
This patch implements that.
gdb/ChangeLog:
* windows-tdep.c (is_linked_with_cygwin_dll): Consider case where
import table is not at beginning of .idata section.
Nick Clifton [Thu, 16 Apr 2020 17:02:10 +0000 (18:02 +0100)]
Stop the MIPS assembler from accepting ifunc symbols.
PR 25803
gas * config/obj-elf.c (obj_elf_type): Reject ifunc symbols on MIPS
targets.
* testsuite/gas/elf/elf.exp: Add MIPS targets to the list to skip
for the type-2 test.
* testsuite/gas/elf/type-noifunc.e: Update to allow for MIPS
targets running this test.
bfd * elfxx-mips.c (_bfd_mips_elf_adjust_dynamic_symbol): Replace an
abort with a more helpful error message.
Stephen Casner [Thu, 16 Apr 2020 15:13:31 +0000 (16:13 +0100)]
Fix the test for PR 18963 so that it will work on 16-bit targets.
PR ld/18963
* testsuite/ld-scripts/pr18963.s: New, replaces empty data.s to
allocate space in text, data, bss here rather than pr18963.t.
* testsuite/ld-scripts/pr18963.t: Remove assignments to dot.
* testsuite/ld-scripts/pr18963.d: Change addresses to fit 16 bits.
Pedro Alves [Thu, 16 Apr 2020 13:50:07 +0000 (14:50 +0100)]
Refactor delete_program_space as a destructor
Currently, while the program_space's ctor adds the new pspace to the
pspaces list, the destructor doesn't remove the pspace from the pspace
list. Instead, you're supposed to use delete_program_space, to both
remove the pspace from the list, and deleting the pspace.
This patch eliminates delete_program_space, and makes the pspace dtor
remove the deleted pspace from the pspace list itself, i.e., makes the
dtor do the mirror opposite of the ctor.
I found this helps with a following patch that will allocate a mock
program_space on the stack. It's easier to just let the regular dtor
remove the mock pspace from the pspace list than arrange to call
delete_program_space instead of the pspace dtor in that situation.
While at it, move the ctor/dtor intro comments to the header file, and
make the ctor explicit.
gdb/ChangeLog:
2020-04-16 Pedro Alves <palves@redhat.com>
* inferior.c (delete_inferior): Use delete operator directly
instead of delete_program_space.
* progspace.c (add_program_space): New, factored out from
program_space::program_space.
(remove_program_space): New, factored out from
delete_program_space.
(program_space::program_space): Remove intro comment. Rewrite.
(program_space::~program_space): Remove intro comment. Call
remove_program_space.
(delete_program_space): Delete.
* progspace.h (program_space::program_space): Make explicit. Move
intro comment here, adjusted.
(program_space::~program_space): Move intro comment here,
adjusted.
(delete_program_space): Remove.
Tom Tromey [Thu, 16 Apr 2020 13:24:57 +0000 (07:24 -0600)]
Fix Cygwin gdb build
Simon pointed out that the windows-nat sharing series broke the Cygwin
build. This patch fixes the problem, by moving the Cygwin-specific
code to a new handler function. This approach is taken because this
code calls find_pc_partial_function, which isn't available in
gdbserver.
gdb/ChangeLog
2020-04-16 Tom Tromey <tromey@adacore.com>
* windows-nat.c (windows_nat::handle_access_violation): New
function.
* nat/windows-nat.h (handle_access_violation): Declare.
* nat/windows-nat.c (handle_exception): Move Cygwin code to
windows-nat.c. Call handle_access_violation.
gdbserver/ChangeLog
2020-04-16 Tom Tromey <tromey@adacore.com>
* win32-low.cc (windows_nat::handle_access_violation): New
function.
When run with target board cc-with-gdb-index, we run into:
...
(gdb) break main
warning: (Internal error: pc 0x4004a7 in read in CU, but not in symtab.)
<repeat>
warning: (Internal error: pc 0x4004ab in read in CU, but not in symtab.)
<repeat>
Breakpoint 1 at 0x4004ab
(gdb) PASS: gdb.dwarf2/imported-unit-runto-main.exp: setting breakpoint at main
run
Starting program: /data/gdb_versions/devel/build/gdb/testsuite/outputs/gdb.dwarf2/imported-unit-runto-main/imported-unit-runto-main
warning: (Internal error: pc 0x4004a7 in read in CU, but not in symtab.)
<repeat>
warning: (Internal error: pc 0x4004ab in read in CU, but not in symtab.)
<repeat>
Breakpoint 1, warning: (Internal error: pc 0x4004ab in read in CU, but not in symtab.)
warning: (Internal error: pc 0x4004ab in read in CU, but not in symtab.)
<repeat>
0x00000000004004ab in main ()
warning: (Internal error: pc 0x4004ab in read in CU, but not in symtab.)
<repeat>
(gdb) FAIL: gdb.dwarf2/imported-unit-runto-main.exp: running to main in runto
...
Looking at the .gdb_index section contents using objdump --dwarf=gdb_index, we
have:
...
CU table:
[ 0] 0x0 - 0x2d
[ 1] 0x2e - 0xa4
[ 2] 0xa5 - 0xc6
[ 3] 0xf7 - 0x126
[ 4] 0x127 - 0x2de
[ 5] 0x2df - 0x300
Symbol table:
[489] main: 4 [global, function]
...
We see that both the main symbol, and main address range map to CU 4, which has
offset range 0x127 - 0x2de, while main actually is contained in CU 3 at offset
range 0xf7 - 0x126.
This is caused by this continue in write_gdbindex, which triggers for the PU:
...
/* CU of a shared file from 'dwz -m' may be unused by this main file.
It may be referenced from a local scope but in such case it does not
need to be present in .gdb_index. */
if (psymtab == NULL)
continue;
...
The continue causes the PU to be skipped in the CU table (we can see that the
PU offset range 0xc7-0xf6 is missing) but the references are not taking that
into account.
I've tried fixing this in the optimal way, by updating the references, but ran
into trouble when follow_die_offset tries to find the CU for the inter-CU
ref. Because the PU is missing from the CU table,
dwarf2_find_containing_comp_unit bisects to the wrong CU.
Fix this by not skipping the PU in the CU table.
Build and reg-tested on x86_64-linux, with native and target boards
cc-with-gdb-index, cc-with-dwz and cc-with-dwz-m.
gdb/ChangeLog:
2020-04-16 Tom de Vries <tdevries@suse.de>
PR symtab/25791
* dwarf2/index-write.c (write_gdbindex): Generate CU table entries for
CUs without psymtab.
gdb/testsuite/ChangeLog:
2020-04-16 Tom de Vries <tdevries@suse.de>
PR symtab/25791
* gdb.dwarf2/gdb-add-index.exp (add_gdb_index): Move ...
(ensure_gdb_index): and factor out and move ...
* lib/gdb.exp (add_gdb_index, ensure_gdb_index): ... here.
* gdb.dwarf2/imported-unit-runto-main.exp: New file.
Specifically, with regard to PyEval_InitThreads(), it says:
The PyEval_InitThreads() and PyEval_ThreadsInitialized() functions
are now deprecated and will be removed in Python 3.11. Calling
PyEval_InitThreads() now does nothing. The GIL is initialized by
Py_Initialize() since Python 3.7. (Contributed by Victor Stinner
in bpo-39877.)
I chose to disable the call with a #if test using PY_VERSION_HEX.
There is precedent for use of PY_VERSION_HEX; it's used in two places
in python-internal.h. I noticed that under certain circumstances
python-internal.h defines PyEval_InitThreads to be nothing, which
accomplishes the same thing. I considered doing something similar for
this case, but decided against it because, at some point in the future,
the presence of PyEval_InitThreads() without some explanation will be
confusing to a reader who won't be able to find PyEval_InitThreads in
the current (future for us) Python API. IMO, use of the #if along
with an accompanying comment seemed more straightforward.
gdb/ChangeLog:
* python/python.c (do_start_initialization): Don't call
PyEval_InitThreads for Python 3.9 and beyond.
Tom de Vries [Thu, 16 Apr 2020 06:40:19 +0000 (08:40 +0200)]
[gdb/testsuite] Fix maint-expand-symbols-header-file.exp for cc-with-gdb-index
With test-case gdb.base/maint-expand-symbols-header-file.exp and target board
cc-with-gdb-index, we have:
...
FAIL: gdb.base/maint-expand-symbols-header-file.exp: \
verify no symtabs are expanded
...
By default, with partial symbols, we find the main function in the partial
symbols, and derive the initial language setting from that, without expanding
any psymtab.
But that doesn't work with the indices, because the indices don't store the
language with the symbols. So instead, the main psymtab is expanded to get
the language of main, which causes the FAIL.
Fix this by manually setting the language.
Tested on x86_64-linux.
gdb/testsuite/ChangeLog:
2020-04-16 Tom de Vries <tdevries@suse.de>
* gdb.base/maint-expand-symbols-header-file.exp: Set language before
loading exec.
Alan Modra [Thu, 16 Apr 2020 03:15:30 +0000 (12:45 +0930)]
PowerPC64 GOT reloc reserving PLT entry for ifunc
I can't see any reason why ELFv2 should create a PLT entry for ifuncs
referenced by GOT relocs as long as the GOT entry remains. The GOT
entry ought to be resolved by ld.so to the value returned by the ifunc
resolver, or if there is global entry stub created for some other
reason, by the linker to the stub address.
* elf64-ppc.c (ppc64_elf_check_relocs): Don't create plt entries
for GOT relocs against ifuncs.
Alan Modra [Thu, 16 Apr 2020 01:13:25 +0000 (10:43 +0930)]
PowerPC64 GOT reloc optimisation
When the symbol referenced by a GOT reloc is an ifunc, we can't
optimise away the GOT indirection. Well, we can, but only if a global
entry stub is created with the ifunc symbol redefined to the stub.
But that results in slower code and an indirection via the PLT so
there isn't much to like about that solution.
* elf64-ppc.c (ppc64_elf_edit_toc): Exclude ifunc from GOT
optimisation.
(ppc64_elf_relocate_section): Likewise.
Simon Marchi [Thu, 16 Apr 2020 01:09:17 +0000 (21:09 -0400)]
gdbserver: fix format string warning in win32-low.cc
When compiling on Cygwin, we get:
CXX win32-low.o
/home/smarchi/src/binutils-gdb/gdbserver/win32-low.cc: In function ‘int get_child_debug_event(DWORD*, target_waitstatus*)’:
/home/smarchi/src/binutils-gdb/gdbserver/win32-low.cc:1459:17: error: format ‘%x’ expects argument of type ‘unsigned int’, but argument 2 has type ‘long int’ [-Werror=format=]
1459 | OUTMSG2 (("get_windows_debug_event - "
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
1460 | "unexpected stop in 0x%x (expecting 0x%x)\n",
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1461 | ptid.lwp (), desired_stop_thread_id));
| ~~~~~~~~~~~
| |
| long int
/home/smarchi/src/binutils-gdb/gdbserver/win32-low.cc:52:11: note: in definition of macro ‘OUTMSG2’
52 | printf X; \
| ^
/home/smarchi/src/binutils-gdb/gdbserver/win32-low.cc:1460:26: note: format string is defined here
1460 | "unexpected stop in 0x%x (expecting 0x%x)\n",
| ~^
| |
| unsigned int
| %lx
`ptid.lwp ()` is a `long` value, so it indeed needs the `l` size modifier.
gdbserver/ChangeLog:
* win32-low.cc (get_child_debug_event): Fix format string warning.
Tom Tromey [Wed, 15 Apr 2020 18:37:29 +0000 (12:37 -0600)]
Use debug_printf in windows-nat.c
While debugging a bug on Windows, I noticed that windows-nat.c is not
sending its debugging output to gdb_stdlog. This is unfortunate
because it means that "set logging debugredirect" doesn't work
properly.
This patch fixes the problem by changing windows-nat.c to use
debug_printf.
Note that get_windows_debug_event also writes one debugging message
unconditionally. It isn't clear to me if this really ought to use
DEBUG_EVENTS or not, since it seems like perhaps it is intended to
note an unexpected event occurring. So, I didn't change this.
I'm checking this in.
gdb/ChangeLog
2020-04-15 Tom Tromey <tromey@adacore.com>
* windows-nat.c (DEBUG_EXEC, DEBUG_EVENTS, DEBUG_MEM)
(DEBUG_EXCEPT): Use debug_printf.
caused the completion hash table to become corrupted if the table ever
needed to grow beyond its original size of 200 elements.
The hash table stores completion_tracker::completion_hash_entry
objects, but hashes them based on their name, which is only one field
of the object.
When possibly inserting a new element we compute the hash with
htab_hash_string of the new elements name, and then lookup matching
elements using htab_find_slot_with_hash. If there's not matching
element we create a completion_hash_entry object within the hash
table.
However, when we allocate the hash we pass htab_hash_string to
htab_create_alloc as the hash function, and this is not OK. This
means that when the hash table needs to grow, existing elements within
the hash are re-hashed by passing the completion_hash_entry pointer to
htab_hash_string, which obviously does not do what we expect.
The solution is to create a new hash function that takes a pointer to
a completion_hash_entry, and then calls htab_hash_string on the name
of the entry only.
This regression was spotted when running the gdb.base/completion.exp
test on the aarch64 target.
gdb/ChangeLog:
* completer.c (class completion_tracker::completion_hash_entry)
<hash_name>: New member function.
(completion_tracker::discard_completions): New callback to hash a
completion_hash_entry, pass this to htab_create_alloc.
Jon Turney [Wed, 13 Jan 2016 18:27:48 +0000 (18:27 +0000)]
Better handling of realpath() failure in windows_make_so() on Cygwin
It seems Cygwin's realpath() can fail on certain DLLs (apparently some
AV software prevent it working on it's DLLs; See [1], [2]). Warn rather
than stopping with an error if that occurs.
Alan Modra [Wed, 15 Apr 2020 09:56:55 +0000 (19:26 +0930)]
objdump --no-addresses
I find this useful when needing to compare compiler output, where the
address of the instruction and the value of symbols results in
unwanted differences.
* objdump.c (no_addresses): New static var.
(usage): Print help for --no-addresses.
(long_options): Add --no-addresses entry.
(objdump_print_addr_with_sym, objdump_print_addr): Omit symbol address.
(disassemble_bytes): Don't print current line address, or reloc
address.
* doc/binutils.texi: Document objdump --no-addresses.
Alan Modra [Wed, 15 Apr 2020 09:28:11 +0000 (18:58 +0930)]
PR25823, Use after free in bfd_hash_lookup
PR 25823
* peXXigen.c (_bfd_XXi_swap_sym_in <C_SECTION>): Don't use a
pointer into strings that may be freed for section name, always
allocate a new string.
Artur Shepilko [Wed, 15 Apr 2020 07:44:12 +0000 (09:44 +0200)]
Fix makeinfo warnings in gdb.texinfo and python.texi docs
Building gdb-9.1 on a system that has an older version of makeinfo
(4.8) shows the following warnings:
-----------------
make[4]: Entering directory '/home/tester/gdb-9.1/build/gdb/doc'
makeinfo --split-size=5000000 --split-size=5000000 -I
../../../gdb/doc/../../readline/readline/doc -I ../../../gdb/doc/../mi
-I ../../../gdb/doc \
-o gdb.info ../../../gdb/doc/gdb.texinfo
../../../gdb/doc/gdb.texinfo:21867: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21867: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21868: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21868: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21869: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21869: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21872: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21872: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21874: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21874: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21876: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21876: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21879: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21879: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21931: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21931: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21933: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21933: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21936: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21936: warning: unlikely character ] in @var.
../../../gdb/doc/gdb.texinfo:21939: warning: unlikely character [ in @var.
../../../gdb/doc/gdb.texinfo:21939: warning: unlikely character ] in @var.
../../../gdb/doc//python.texi:3297: warning: `.' or `,' must follow
@xref, not `A'.
make[4]: Leaving directory '/home/tester/gdb-9.1/build/gdb/doc'
-----------------
These are thrown by expressions like `@var{[host]}`, intended to
produce `[HOST]`.
In that context this should instead be changed to `[@var{host}]`, which
has the same effect but without the warnings.
As for the warning in `python.texi`, there's period missing at the end
of one `@xref{}` clause. Added.
gdb/doc/ChangeLog:
2020-04-15 Artur Shepilko <nomadbyte@gmail.com>
* gdb.texinfo: Transform @var{[host]} to [@var{host}]; this
clears makeinfo warnings.
* python.texi: Add a missing period trailing an @xref{} clause;
this clears a makeinfo warning.
projects / thirdparty / binutils-gdb.git / log
