binutils-gdb.git
4 years agoFix signedness comparison warning in elfcore_grok_win32pstatus()
Jon Turney [Wed, 12 Aug 2020 15:34:47 +0000 (16:34 +0100)]
Fix signedness comparison warning in elfcore_grok_win32pstatus()

bfd/ChangeLog:

2020-08-12  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Use unsigned int for
win32pstatus note type to avoid signedness comparison warning.

4 years agoTwo fixes in dwarf-mode.el
Tom Tromey [Wed, 12 Aug 2020 14:41:03 +0000 (08:41 -0600)]
Two fixes in dwarf-mode.el

This fixes a couple of small problems in dwarf-mode.el.

First, I noticed that for an attribute like:

 <2><136c>: Abbrev Number: 11 (DW_TAG_member)
    <136d>   DW_AT_name        : t

... the "t" would not be font-locked using the function name face.
The problem here is that the regexp assumed the indirect string
format, like:

    <12ac>   DW_AT_name        : (indirect string, offset: 0x1b40): whatever

Here the fix is to adjust the regexp to match both formats.

Second, when following a DIE reference, point could end up on an
attribute instead.  This happens when there is a zero-length attribute
with the same "offset" as the following DIE, like:

    <12c5>   DW_AT_GNU_all_call_sites: 1
 <2><12c5>: Abbrev Number: 5 (DW_TAG_formal_parameter)

Here the fix is to search for the DIE by looking for the depth ("<2>"
in the example) as well.

I've bumped the internal version number to make it simpler to install
this using the Emacs package facility.

binutils/ChangeLog
2020-08-12  Tom Tromey  <tromey@adacore.com>

* dwarf-mode.el (Version): Now 1.6.
(dwarf-die-button-action): Tighten DIE reference regexp.
(dwarf-font-lock-keywords): Update name regexp.

4 years agoOnly warn about malformed win32pstatus notes
Jon Turney [Fri, 17 Jul 2020 14:25:47 +0000 (15:25 +0100)]
Only warn about malformed win32pstatus notes

bfd/ChangeLog:

2020-07-21  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Warn on malformed
win32pstatus notes, and return TRUE so we continue rather than
stopping as if it was an error.

4 years agoAdd handling for 64-bit module addresses in Cygwin core dumps
Jon Turney [Mon, 29 Jun 2020 16:11:51 +0000 (17:11 +0100)]
Add handling for 64-bit module addresses in Cygwin core dumps

bfd/ChangeLog:

2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Handle NOTE_INFO_MODULE64.

4 years agoRefine size constraints applied to win32pstatus ELF notes
Jon Turney [Wed, 1 Jul 2020 15:18:23 +0000 (16:18 +0100)]
Refine size constraints applied to win32pstatus ELF notes

Don't reject any win32pstatus notes smaller than minimum size for a
NOTE_INFO_THREAD.

This only happens to work because the Cygwin dumper tool currently
writes all these notes as the largest size of the union, (which wastes
lots of space in the core dump).

Instead, apply the appropriate size constraint for each win32pstatus
note type.

bfd/ChangeLog:

2020-07-11  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Don't apply size constraint
for NOTE_INFO_THREAD to all win32pstatus ELF notes, instead apply
appropriate size constraint for each win32pstatus note type.

4 years agoDon't hardcode CONTEXT size for a NOTE_INFO_THREAD win32pstatus note
Jon Turney [Mon, 29 Jun 2020 16:15:02 +0000 (17:15 +0100)]
Don't hardcode CONTEXT size for a NOTE_INFO_THREAD win32pstatus note

Don't hardcode the size of the Win32 API thread CONTEXT type read from a
NOTE_INFO_THREAD win32pstatus note (since it's different on different
architectures).

bfd/ChangeLog:

2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Don't hardcode the size of
the Win32 API thread CONTEXT type read from a NOTE_INFO_THREAD
win32pstatus note.

4 years agoDefine constants for win32pstatus ELF notes
Jon Turney [Sat, 11 Jul 2020 13:02:17 +0000 (14:02 +0100)]
Define constants for win32pstatus ELF notes

Define constants for win32pstatus ELF notes, as they were prior to
4a6636fb, and say what specifies them.

bfd/ChangeLog:

2020-07-11  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (NOTE_INFO{_PROCESS,_THREAD,_MODULE}): Define.
(elfcore_grok_win32pstatus): Use.

4 years agoRead tid from correct offset in win32pstatus NOTE_INFO_THREAD
Jon Turney [Mon, 29 Jun 2020 14:54:41 +0000 (15:54 +0100)]
Read tid from correct offset in win32pstatus NOTE_INFO_THREAD

Fix the offset used to read the tid from a win32pstatus ELF note.

This probably meant that registers were only being correctly recovered
from the core dump for the current thread.

It looks like this has beeen incorrect since 4a6636fb.

Also fix offsets used in NOTE_INFO_PROCESS (which is not actually
generated by the Cygwin dumper tool).

Also improve comment.

bfd/ChangeLog:

2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Fix the offset used to read
the tid from a win32pstatus NOTE_INFO_THREAD ELF note.  Fix
offsets used to read NOTE_INFO_PROCESS.

4 years agoFix duplicate label in gdb.dwarf2/dw2-op-out-param.S
Gary Benson [Wed, 12 Aug 2020 13:48:55 +0000 (14:48 +0100)]
Fix duplicate label in gdb.dwarf2/dw2-op-out-param.S

gdb.dwarf2/dw2-op-out-param.S contained a duplicate label, and failed
to build with clang with the following error:

 gdb compile failed, /gdbtest/src/gdb/testsuite/gdb.dwarf2/dw2-op-out-param.S:163:1:
       error: invalid symbol redefinition
 .Ltext5:
 ^

This commit renames the two labels as .Ltext5a and .Ltext5b, and
updates all references appropriately.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/dw2-op-out-param.S (.Ltext5): Fix duplicate label.

4 years agoaarch64: Add support for MPAM system registers
Alex Coplan [Wed, 12 Aug 2020 12:49:54 +0000 (13:49 +0100)]
aarch64: Add support for MPAM system registers

This patch adds support for the system registers introduced in the
Armv8-A MPAM extension.

See https://developer.arm.com/documentation/ddi0598/latest for the
Arm ARM supplement documenting this extension.

gas/ChangeLog:

* testsuite/gas/aarch64/mpam-bad.d: New test.
* testsuite/gas/aarch64/mpam-bad.l: Error output.
* testsuite/gas/aarch64/mpam-bad.s: Input.
* testsuite/gas/aarch64/mpam.d: New test.
* testsuite/gas/aarch64/mpam.s: Input.

opcodes/ChangeLog:

* aarch64-opc.c (aarch64_sys_regs): Add MPAM registers.

4 years agoThe description for -mno-csr-check talks about "cheching" rather than "checking".
Nick Clifton [Wed, 12 Aug 2020 12:47:04 +0000 (13:47 +0100)]
The description for -mno-csr-check talks about "cheching" rather than "checking".

PR 26346
* doc/c-riscv.texi (RISC-V-Options): Fix typo in the description
of the -mno-csr-check option.

4 years agoAdd demangling support to readelf.
Nick Clifton [Wed, 12 Aug 2020 12:31:59 +0000 (13:31 +0100)]
Add demangling support to readelf.

PR binutils/26331
* readelf.c (do_demangle): New option flag.
(print_symbol): If do_demangle is enabled, demangle the symbol.
(enum long_option_values): New enum to hold long option values.
(options): Add demangle, no-demangle, recursion-limit and
no-recursion-limit options.  Alpha sort the table.
(usage): Describe the new options.
(parse_args): Handle the new options.
* NEWS: Mention the new feature.
* doc/binutils.texi: Document the new feature.
* testsuite/binutils-all/readelf.exp: Test the new feature.
* testsuite/binutils-all/mangled.s: New file - assembler source.
* testsuite/binutils-all/readelf.demangled: New file - expected
output from readelf.

4 years agoUpdated Serbian and Russian translations for various sub-directories
Nick Clifton [Wed, 12 Aug 2020 10:25:38 +0000 (11:25 +0100)]
Updated Serbian and Russian translations for various sub-directories

4 years agoAutomatic date update in version.in
GDB Administrator [Wed, 12 Aug 2020 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoPowerPC CELL cctp*
Alan Modra [Tue, 11 Aug 2020 07:50:04 +0000 (17:20 +0930)]
PowerPC CELL cctp*

* ppc-opc.c (powerpc_opcodes): Move cctpl, cctpm and cctph.

4 years ago[gdb/build] Mark ms1 as deleted in MAINTAINERS
Tom de Vries [Tue, 11 Aug 2020 09:07:54 +0000 (11:07 +0200)]
[gdb/build] Mark ms1 as deleted in MAINTAINERS

When running gdb/gdb_mbuild.sh, we run into:
...
ms1-elf ...
... src/configure --target=ms1-elf --enable-gdb-build-warnings=,-Werror \
  --enable-sim-build-warnings=,-Werror
... make -k -j 5 ms1-elf
ms1-elf: compile failed
...

In mbuild/ms1-elf/Build.log we find:
...
*** Configuration mt-unknown-elf is obsolete.
*** Support has been REMOVED.
make: *** [Makefile:10995: configure-gdb] Error 1
...

The support for ms1-elf, aka mt-elf, has been removed since commit dc71152484
"Remove mt port" in Jan 2018.  Make this official in the MAINTAINERS file.

Tested using gdb/gdb_mbuild.sh.

gdb/ChangeLog:

2020-08-11  Tom de Vries  <tdevries@suse.de>

* MAINTAINERS: Mark ms1 as deleted.

4 years agoAutomatic date update in version.in
GDB Administrator [Tue, 11 Aug 2020 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoaarch64: Don't assert on long sysreg names
Alex Coplan [Mon, 10 Aug 2020 16:44:02 +0000 (17:44 +0100)]
aarch64: Don't assert on long sysreg names

This patch fixes an assertion failure on long system register operands
in the AArch64 backend. See the new testcase for an input which
reproduces the issue.

gas/ChangeLog:

* config/tc-aarch64.c (parse_sys_reg): Don't assert when parsing
a long system register.
(parse_sys_ins_reg): Likewise.
(sysreg_hash_insert): New.
(md_begin): Use sysreg_hash_insert() to ensure all system
registers are no longer than the maximum length at startup.
* testsuite/gas/aarch64/invalid-sysreg-assert.d: New test.
* testsuite/gas/aarch64/invalid-sysreg-assert.l: Error output.
* testsuite/gas/aarch64/invalid-sysreg-assert.s: Input.

include/ChangeLog:

* opcode/aarch64.h (AARCH64_MAX_SYSREG_NAME_LEN): New.

4 years agoRemove spurious text in changelog entry
Nick Clifton [Mon, 10 Aug 2020 16:24:45 +0000 (17:24 +0100)]
Remove spurious text in changelog entry

4 years agoImprove the documentation of the linker's --relax option.
Nick Clifton [Mon, 10 Aug 2020 15:35:57 +0000 (16:35 +0100)]
Improve the documentation of the linker's --relax option.

PR ld/21351
* ld.texi: Clarify the behaviour of the --relax and --no-relax
options on systems that do not support them.

4 years ago[sim] Fix mbuild build breaker in sim-cpu.c
Tom de Vries [Mon, 10 Aug 2020 15:26:09 +0000 (17:26 +0200)]
[sim] Fix mbuild build breaker in sim-cpu.c

When running gdb/gdb_mbuild.sh, I run into:
...
src/sim/aarch64/../common/sim-cpu.c: In function 'sim_cpu_free':
src/sim/aarch64/../common/sim-cpu.c:64:3: error: implicit declaration of \
  function 'free' [-Werror=implicit-function-declaration]
   free (cpu);
   ^~~~
src/sim/aarch64/../common/sim-cpu.c:64:3: error: incompatible implicit \
  declaration of built-in function 'free' [-Werror]
src/sim/aarch64/../common/sim-cpu.c:64:3: note: include '<stdlib.h>' or \
  provide a declaration of 'free'
...

Fix this by adding "#include <stdlib.h>".

Tested by gdb/gdb_mbuild.sh -e aarch64-elf.

sim/common/ChangeLog:

2020-08-10  Tom de Vries  <tdevries@suse.de>

* sim-cpu.c: Include stdlib.h for free.

4 years ago[aarch64] GAS doesn't validate the architecture version for any tlbi registers. ...
Przemyslaw Wirkus [Mon, 10 Aug 2020 15:20:17 +0000 (16:20 +0100)]
[aarch64] GAS doesn't validate the architecture version for any tlbi registers.  Fixed with this patch.

* gas/config/tc-aarch64.c (parse_sys_reg): Call to
aarch64_sys_ins_reg_supported_p instead of aarch64_sys_reg_supported_p.
(parse_sys_ins_reg): Add aarch64_sys_reg_deprecated_p check.
* include/opcode/aarch64.h (aarch64_sys_reg_deprecated_p): Functions
paramaters changed.
(aarch64_sys_reg_supported_p): Function removed.
(aarch64_sys_ins_reg_supported_p): Functions paramaters changed.
* opcodes/aarch64-opc.c (aarch64_print_operand):
(aarch64_sys_reg_deprecated_p): Functions paramaters changed.
(aarch64_sys_reg_supported_p): Function removed.
(aarch64_sys_ins_reg_supported_p): Functions paramaters changed.
(aarch64_sys_ins_reg_supported_p): Merged aarch64_sys_reg_supported_p
into this function.
* gas/testsuite/gas/aarch64/illegal-sysreg-5.d: New test.
* gas/testsuite/gas/aarch64/illegal-sysreg-5.l: New test.
* gas/testsuite/gas/aarch64/sysreg-5.s: New test.

4 years ago[AArch64] Improve prologue handling (and fix PR26310)
Luis Machado [Mon, 10 Aug 2020 14:56:19 +0000 (11:56 -0300)]
[AArch64] Improve prologue handling (and fix PR26310)

I initially noticed the problem with the addition of
gdb.dwarf2/dw2-line-number-zero.exp.  The following failures showed up:

FAIL: gdb.dwarf2/dw2-line-number-zero.exp: continue to breakpoint: bar1
FAIL: gdb.dwarf2/dw2-line-number-zero.exp: bar1, 1st next
FAIL: gdb.dwarf2/dw2-line-number-zero.exp: bar1, 2nd next
FAIL: gdb.dwarf2/dw2-line-number-zero.exp: continue to breakpoint: bar2
FAIL: gdb.dwarf2/dw2-line-number-zero.exp: bar2, 1st next
FAIL: gdb.dwarf2/dw2-line-number-zero.exp: bar2, 2nd next

They happen because AArch64's prologue analyzer skips too many instructions
and ends up indicating a stopping point further into user code.

Dump of assembler code for function bar1:
   0x00000000000006f8 <+0>: stp x29, x30, [sp, #-16]!
   0x00000000000006fc <+4>: mov x29, sp
   0x0000000000000700 <+8>: mov w0, #0x1                    // #1
   0x0000000000000704 <+12>: bl 0x6e4 <foo>
   0x0000000000000708 <+16>: mov w0, #0x2                    // #2

We should've stopped at 0x700, but the analyzer actually skips
that instruction and stops at 0x704.  Then GDB ends up adjusting
the address further, and pushes the stopping point to 0x708 based on the
SAL information.

I'm not sure if this adjustment to 0x708 is correct though, as it ends up
skipping past a branch. But I'm leaving that aside for now.

One other complicating factor is that GCC seems to be hoisting up instructions
from user code, mixing them up with prologue instructions.

The following patch adjusts the heuristics a little bit, and tracks when the
SP and FP get used.  If we notice an instruction that is not supposed to be
in the prologue, and this happens *after* SP/FP adjustments and saving of
registers, we stop the analysis.

This means, for PR26310, that we will now stop at 0x700.

I've also added a few more unit tests to make sure the updated behavior is
validated.

gdb/ChangeLog:

2020-08-10  Luis Machado  <luis.machado@linaro.org>

PR gdb/26310

* aarch64-tdep.c (aarch64_analyze_prologue): Track use of SP/FP and
act accordingly.
(aarch64_analyze_prologue_test): Add more unit tests to exercise
movz/str/stur/stp skipping behavior.

4 years ago[AArch64] Fix incorrectly-defined SVE macro
Luis Machado [Mon, 10 Aug 2020 14:50:53 +0000 (11:50 -0300)]
[AArch64] Fix incorrectly-defined SVE macro

The kernel has fixed this here:

https://lore.kernel.org/patchwork/patch/1029011/

We should do the same for GDB, which is still carrying an incorrect
definition of the macro.  As stated in the kernel patch thread, this doesn't
actually change things because, luckily, the structs are of the same size.

gdb/ChangeLog:

2020-08-10  Luis Machado  <luis.machado@linaro.org>

* nat/aarch64-sve-linux-sigcontext.h (SVE_PT_REGS_OFFSET): Use
struct user_sve_header instead of struct sve_context.

4 years agoImplement missing powerpc mtspr and mfspr extended insns
Alan Modra [Mon, 10 Aug 2020 12:11:36 +0000 (21:41 +0930)]
Implement missing powerpc mtspr and mfspr extended insns

* ppc-opc.c (powerpc_opcodes): Add many mtspr and mfspr extended
instructions.

4 years agoImplement missing powerpc extended mnemonics
Alan Modra [Mon, 10 Aug 2020 05:38:27 +0000 (15:08 +0930)]
Implement missing powerpc extended mnemonics

gas/
* testsuite/gas/ppc/power8.d,
* testsuite/gas/ppc/power8.s: Add miso.
* testsuite/gas/ppc/power9.d,
* testsuite/gas/ppc/power8.s: Add exser, msgsndu, msgclru.
opcodes/
* ppc-opc.c (powerpc_opcodes): Add exser, msgsndu, msgclru.
Enable icbt for power5, miso for power8.

4 years agoPrioritise mtfprd and mtvrd over mtvsrd in PowerPC disassembly
Alan Modra [Mon, 10 Aug 2020 05:37:33 +0000 (15:07 +0930)]
Prioritise mtfprd and mtvrd over mtvsrd in PowerPC disassembly

gas/
* testsuite/gas/ppc/power8.d: Update.
* testsuite/gas/ppc/vsx2.d: Update.
opcodes/
* ppc-opc.c (powerpc_opcodes): Prioritise mtfprd and mtvrd over
mtvsrd, and similarly for mfvsrd.

4 years agoError on lmw, lswi and related PowerPC insns when LE
Alan Modra [Mon, 10 Aug 2020 05:36:43 +0000 (15:06 +0930)]
Error on lmw, lswi and related PowerPC insns when LE

* config/tc-ppc.c (md_assemble): Error for lmw, stmw, lswi, lswx,
stswi, or stswx in little-endian mode.
* testsuite/gas/ppc/476.d,
* testsuite/gas/ppc/476.s: Delete lmw, stmw, lswi, lswx, stswi, stswx.
* testsuite/gas/ppc/a2.d,
* testsuite/gas/ppc/a2.s: Move lmw, stmw, lswi, lswx, stswi, stswx..
* testsuite/gas/ppc/be.d,
* testsuite/gas/ppc/be.s: ..to here, new big-endian only test.
* testsuite/gas/ppc/le_error.d,
* testsuite/gas/ppc/le_error.l: New little-endian test.
* testsuite/gas/ppc/ppc.exp: Run new tests.

4 years agonm: Remove --with-symbol-versions
H.J. Lu [Mon, 10 Aug 2020 12:17:28 +0000 (05:17 -0700)]
nm: Remove --with-symbol-versions

Since

commit 7e6e972f74aeac0ebdbd95a7f905d871cd2581de
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Mar 24 04:23:11 2020 -0700

    bfd: Display symbol version for nm -D

always displays symbol version for nm, remove --with-symbol-versions and
silently accept it for backward compatibility.

binutils/

PR binutils/26302
* nm.c (with_symbol_versions): Removed.
(long_option_values): Add OPTION_WITH_SYMBOL_VERSIONS.
(long_options): Update --with-symbol-versions entry.
(print_symbol): Remove the with_symbol_versions check.
(main): Add OPTION_WITH_SYMBOL_VERSIONS for backward
compatibility.
* doc/binutils.texi: Remove --with-symbol-versions.

ld/

PR binutils/26302
* testsuite/ld-elf/pr26302.nd: New file.
* testsuite/ld-elf/pr26302.ver: Likewise.
* testsuite/ld-elf/pr26302a.c: Likewise.
* testsuite/ld-elf/pr26302b.c: Likewise.
* testsuite/ld-elf/shared.exp: Run binutils/26302 tests.

4 years agoAutomatic date update in version.in
GDB Administrator [Mon, 10 Aug 2020 00:00:09 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: replace function pointer with `void *` data with function_view
Simon Marchi [Sun, 9 Aug 2020 22:26:48 +0000 (18:26 -0400)]
gdb: replace function pointer with `void *` data with function_view

Replace the function pointer + `void *` parameters of
dwarf2_fetch_die_loc_sect_off and dwarf2_fetch_die_loc_cu_off with a
function_view parameter.  Change call sites to use a lambda function.
This improves type-safety, so reduces the chances of errors.

gdb/ChangeLog:

* read.h (dwarf2_fetch_die_loc_sect_off,
dwarf2_fetch_die_loc_cu_off): Replace function pointer +
`void *` parameter with function_view.
* read.c (dwarf2_fetch_die_loc_sect_off,
dwarf2_fetch_die_loc_cu_off): Likewise.
* loc.c (get_frame_pc_for_per_cu_dwarf_call): Remove.
(per_cu_dwarf_call): Adjust.
(get_frame_address_in_block_wrapper): Remove.
(indirect_synthetic_pointer): Adjust.
(get_ax_pc): Remove.
(dwarf2_compile_expr_to_ax): Adjust.

Change-Id: Ic9b6ced0c4128f2b75ca62e0ed638b0962a22859

4 years agoAutomatic date update in version.in
GDB Administrator [Sun, 9 Aug 2020 00:00:08 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years ago[gdb/build] Fix missing implicit constructor call with gcc 4.8
Tom de Vries [Sat, 8 Aug 2020 21:34:19 +0000 (23:34 +0200)]
[gdb/build] Fix missing implicit constructor call with gcc 4.8

When building gdb on x86_64-linux with --enable-targets riscv64-suse-linux, I
run into:
...
src/gdb/arch/riscv.c:112:45:   required from here
/usr/include/c++/4.8/bits/hashtable_policy.h:195:39: error: no matching \
  function for call to 'std::pair<const riscv_gdbarch_features, const \
  std::unique_ptr<target_desc, target_desc_deleter> >::pair(const \
  riscv_gdbarch_features&, target_desc*&)'
  : _M_v(std::forward<_Args>(__args)...) { }
                                       ^
...
for this code in riscv_lookup_target_description:
...
  /* Add to the cache.  */
  riscv_tdesc_cache.emplace (features, tdesc);
...

Work around this compiler problem (filed as PR gcc/96537), similar to how that
was done in commit 6d0cf4464e "Fix build with gcc-4.8.x":
...
-  riscv_tdesc_cache.emplace (features, tdesc);
+  riscv_tdesc_cache.emplace (features, target_desc_up (tdesc));
...
That is, call the target_desc_up constructor explictly instead of implicitly.

Also, work around a similar issue in get_thread_arch_aspace_regcache.

Build on x86_64-linux with --enable-targets riscv64-suse-linux, and
reg-tested.

gdb/ChangeLog:

2020-08-08  Tom de Vries  <tdevries@suse.de>

PR build/26344
* arch/riscv.c (riscv_lookup_target_description): Use an explicit
constructor.
* regcache.c (get_thread_arch_aspace_regcache): Same.

4 years agoAutomatic date update in version.in
GDB Administrator [Sat, 8 Aug 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agobpf: add missing tests from previous commits
Jose E. Marchesi [Fri, 7 Aug 2020 18:40:01 +0000 (20:40 +0200)]
bpf: add missing tests from previous commits

2020-08-07  David Faust  <david.faust@oracle.com>

* testsuite/ld-bpf/call-3.s: New file.
* testsuite/ld-bpf/call-3.d: Likewise.

4 years agobpf: fix false overflow in eBPF ELF backend linker
David Faust [Fri, 7 Aug 2020 18:36:47 +0000 (20:36 +0200)]
bpf: fix false overflow in eBPF ELF backend linker

When performing DISP{16,32} relocations, the eBPF ELF backend linker
needs to convert the relocation from an address into a signed number
of 64-bit words (minus one) to jump.

Because of this unsigned-to-signed conversion, special care needs to
be taken when dividing to ensure the sign bits remain correct.
Otherwise, a false relocation overflow error can be triggered.

bfd/ChangeLog

2020-08-07  David Faust  <david.faust@oracle.com>

* elf64-bpf.c (bpf_elf_relocate_section): Ensure signed division for
DISP16 and DISP32 relocations.

ld/ChangeLog

2020-08-07  David Faust  <david.faust@oracle.com>

* testsuite/ld-bpf/call-3.s: New file.
* testsuite/ld-bpf/call-3.d: Likewise.

4 years agogdb: fix whitespace issues in ChangeLog
Simon Marchi [Fri, 7 Aug 2020 15:29:45 +0000 (11:29 -0400)]
gdb: fix whitespace issues in ChangeLog

Change-Id: Iea4bd2096bb994ec4ea9145cbe316aa345e8c6db

4 years agoFix remaining Ravenscar regressions
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Fix remaining Ravenscar regressions

Testing showed a few more Ravenscar regressions arising from upstream.
In particular, gdb now uses the current thread in some places where
inferior_ptid was previously used.  This patch fixes the problem by
arranging to save and restore the thread now.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c
(ravenscar_thread_target::set_base_thread_from_ravenscar_task):
New method.
(ravenscar_thread_target::wait): Check
runtime_initialized.
(ravenscar_thread_target::prepare_to_store)
(ravenscar_thread_target::stopped_by_sw_breakpoint)
(ravenscar_thread_target::stopped_by_hw_breakpoint)
(ravenscar_thread_target::stopped_by_watchpoint)
(ravenscar_thread_target::stopped_data_address)
(ravenscar_thread_target::core_of_thread): Use
scoped_restore_current_thread and
set_base_thread_from_ravenscar_task.

4 years agoSet inferior_ptid in ravenscar_thread_target::update_thread_list
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Set inferior_ptid in ravenscar_thread_target::update_thread_list

Commit 2da4b788f ("Don't write to inferior_ptid in
ravenscar-thread.c") caused a Ravenscar regression (which, FWIW, is
understandable because Ravenscar is difficult to test).  Namely,
ravenscar_thread_target::update_thread_list calls
iterate_over_live_ada_tasks, which calls ada_build_task_list, which
uses target_has_stack -- which relies on inferior_ptid.

This patch changes update_thread_list to ensure that inferior_ptid is
set before making this call.  This avoids various failures on
Ravenscar targets.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (update_thread_list): Set inferior_ptid.

4 years agoFetch registers from correct thread in ravenscar-thread.c
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Fetch registers from correct thread in ravenscar-thread.c

Fabien also noticed that gdb would not report a stop correctly when
using Ravenscar.  This patch fixes the bug by making a few changes:

* ravenscar_thread_target::wait now updates the inferior ptid before
  updating the thread list.  This ensures that a new thread is
  correctly associated with the underlying CPU.

* The fetch_registers, store_registers, and prepare_to_store methods
  now save and restore the regcache's ptid before doing the operation
  on the underlying live thread.  This ensures that gdb informs the
  remote of a thread it knows about, as opposed to using a Ravenscar
  thread, which probably will not be recognized.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target::wait): Call
update_inferior_ptid before update_thread_list.
(temporarily_change_regcache_ptid): New class.
(ravenscar_thread_target::fetch_registers)
(ravenscar_thread_target::store_registers)
(ravenscar_thread_target::prepare_to_store): Use base thread when
forwarding operation.

4 years agoFix Ravenscar "process" resume
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Fix Ravenscar "process" resume

A coworker noticed that gdb would send the wrong vCont packet to qemu
when debugging a Ravenscar program:

    > (gdb) thread 2
    > [Switching to thread 2 (Thread 1.2)]
    > #0  0x0000000000001000 in ?? ()

    > (gdb) c
    [...]
    > Sending packet: $vCont;c:p1.1#e2...Ack

Here, we've switched to thread 2, but the packet says to resume thread
1.

This turned out to be a bug in ravenscar_thread_target::resume, which
did not properly handle the case of a "process" resume.  In
particular, the resume method would be passed a ptid of (1, 0, 0) --
but then rewrite this to its saved ptid.

This patch fixes the problem by recognizing this case in the resume
method.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target::resume): Handle
"is_pid" case.

4 years agoUpdate Ravenscar documentation
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Update Ravenscar documentation

This documents some recent Ravenscar changes, and further documents
the known limitation where stepping through the runtime initialization
code does not work properly.

gdb/doc/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* gdb.texinfo (Ravenscar Profile): Add examples.
Document runtime initialization limitation.

4 years agoWrap xfer_partial and enable_btrace for Ravenscar
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Wrap xfer_partial and enable_btrace for Ravenscar

A gdb crash showed that the xfer_partial target method was not wrapped
for Ravenscar.  This caused remote.c to call
remote::set_general_thread with a Ravenscar "fake" ptid, which showed
up later as an event ptid.

I went through all the target methods and looked to see which ones
could call set_general_thread or set_continue_thread (but not
set_general_process, as I think Ravenscar targets aren't
multi-inferior).  This patch wraps the two that I found.

xfer_partial requires special treatment, because it can be called
recursively via get_base_thread_from_ravenscar_task.  To avoid a
recursive call, this patch changes update_thread_list to record all
tasks in the m_cpu_map, and changes get_thread_base_cpu to prefer this
map.  This avoids some memory reads.

It was unclear to me whether enable_btrace really makes sense for
Ravenscar; but at the same time it seemed harmless to add this patch.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (xfer_partial, enable_btrace, add_thread):
New methods.
(ravenscar_thread_target::get_thread_base_cpu): Check m_cpu_map
first.
(ravenscar_thread_target::add_thread): Rename from
ravenscar_add_thread.
(ravenscar_thread_target::update_thread_list): Use a lambda.
(ravenscar_thread_target::xfer_partial): New method.

4 years agoUse gdb::function_view in iterate_over_live_ada_tasks
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Use gdb::function_view in iterate_over_live_ada_tasks

This changes iterate_over_live_ada_tasks to accept a
gdb::function_view.  This is needed by a subsequent patch.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ada-lang.h (ada_task_list_iterator_ftype): Now a
gdb::function_view.
(iterate_over_live_ada_tasks): Change type of argument.
* ada-tasks.c (iterate_over_live_ada_tasks): Change type
of argument.

4 years agoChange names given to Ravenscar threads
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Change names given to Ravenscar threads

Current a Ravenscar thread is given the same sort of name as a "CPU"
thread; they can only be distinguished by looking at the output of
"info thread".

This patch changes ravenscar-thread.c to distinguish these threads,
like:

    (gdb) continue
    Continuing.
    [New Ravenscar Thread 0x2b910]

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target) <extra_thread_info>:
Remove.
(ravenscar_thread_target::extra_thread_info): Remove.
(ravenscar_thread_target::pid_to_str): Mention Ravenscar in result;
defer to target beneath for non-Ravenscar threads.

4 years agoHandle case where Ada task is current but not listed
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Handle case where Ada task is current but not listed

Currently, the ravenscar runtime can mark an Ada task as the current
task, before adding it to the list of tasks that can be read by gdb.
In this scenario, gdb can sometimes crash in
ravenscar_get_thread_base_cpu with:

../../src/gdb/ravenscar-thread.c:167: internal-error: int ravenscar_get_thread_base_cpu(ptid_t): Assertion `task_info != NULL' failed.

However, as ravenscar_get_thread_base_cpu is only called to find the
base CPU, we can simply record this when registering the thread, and
look this up later.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target) <get_base_cpu,
get_base_thread_from_ravenscar_task>: Now methods.
<m_cpu_map>: New member.
(ravenscar_thread_target::get_thread_base_cpu): Rename from
ravenscar_get_thread_base_cpu.  Check m_cpu_map.
(ravenscar_thread_target::task_is_currently_active): Update.
(ravenscar_thread_target::get_base_thread_from_ravenscar_task):
Now a method.
(ravenscar_thread_target::add_active_thread): Put initial thread
into the m_cpu_map.

4 years agoReturn event_ptid from ravenscar_thread_target::wait
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Return event_ptid from ravenscar_thread_target::wait

ravenscar_thread_target::wait should return the event ptid from the
wrapped "wait" call in the situation where returning the Ravenscar
thread ptid is not appropriate.  This probably does not really make a
difference in practice, but it seemed like a reasonable cleanup.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target::wait): Return
event_ptid.

4 years agoAvoid crash in ravenscar_thread_target::wait
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Avoid crash in ravenscar_thread_target::wait

An earlier patch caused a Ravenscar regression in
ravenscar_thread_target::wait.  In particular, add_active_thread can
return NULL when the runtime is not initialized.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target::wait): Check
runtime_initialized.

4 years agoCall add_active_thread after pushing the ravenscar target
Tom Tromey [Fri, 7 Aug 2020 16:26:45 +0000 (10:26 -0600)]
Call add_active_thread after pushing the ravenscar target

Currently ravenscar-thread.c calls add_active_thread before pushing
the ravenscar target.  This yields an initial thread announcement of
"[Thread 0]".  Calling add_active_thread after pushing the target
fixes this.

gdb/ChangeLog
2020-08-07  Tom Tromey  <tromey@adacore.com>

* ravenscar-thread.c (ravenscar_thread_target): Don't call
add_active_thread.
(ravenscar_thread_target::add_active_thread): Now public.
(ravenscar_inferior_created): Call add_active_thread after pushing
the target.

4 years agogdb: change regcache list to be a map
Simon Marchi [Fri, 7 Aug 2020 15:28:52 +0000 (11:28 -0400)]
gdb: change regcache list to be a map

One regcache object is created for each stopped thread and is stored in
the regcache::regcaches linked list.  Looking up a regcache for a given
thread is therefore in O(number of threads).  Stopping all threads then
becomes O((number of threads) ^ 2).  Same goes for resuming a thread
(need to delete the regcache of a given ptid) and resuming all threads.
It becomes noticeable when debugging thousands of threads, which is
typical with GPU targets.  This patch replaces the linked list with some
maps to reduce that complexity.

The first design was using an std::unordered_map with (target, ptid,
arch) as the key, because that's how lookups are done (in
get_thread_arch_aspace_regcache).  However, the registers_changed_ptid
function, also somewhat on the hot path (it is used when resuming
threads), needs to delete all regcaches associated to a given (target,
ptid) tuple.  If the key of the map is (target, ptid, arch), we have to
walk all items of the map, not good.

The second design was therefore using an std::unordered_multimap with
(target, ptid) as the key.  One key could be associated to multiple
regcaches, all with different gdbarches.  When looking up, we would have
to walk all these regcaches.  This would be ok, because there will
usually be actually one matching regcache.  In the exceptional
multi-arch thread cases, there will be maybe two.  However, in
registers_changed_ptid, we sometimes need to remove all regcaches
matching a given target.  We would then have to talk all items of the
map again, not good.

The design as implemented in this patch therefore uses two levels of
map.  One std::unordered_map uses the target as the key.  The value type
is an std::unordered_multimap that itself uses the ptid as the key.  The
values of the multimap are the regcaches themselves.  Again, we expect
to have one or very few regcaches per (target, ptid).

So, in summary:

* The lookups (in get_thread_arch_aspace_regcache), become faster when
  the number of threads grows, compared to the linked list.  With a
  small number of threads, it will probably be a bit slower to do map
  lookups than to walk a few linked list nodes, but I don't think it
  will be noticeable in practice.

* The function registers_changed_ptid deletes all regcaches related to a
  given (target, ptid).  It must now handle the different cases separately:

    - NULL target and minus_one_ptid: we delete all the entries
    - NULL target and non-minus_one_ptid: invalid (checked by assert)
    - non-NULL target and non-minus_one_ptid: we delete all the entries
      associated to that tuple
    - a non-NULL target and minus_one_ptid: we delete all the entries
      associated to that target

* The function regcache_thread_ptid_changed is called when a thread
  changes ptid.  It is implemented efficiently using the map, although
  that's not very important: it is not called often, mostly when
  creating an inferior, on some specific platforms.

This patch is a tiny bit from ROCm GDB [1] we would like to merge
upstream.  Laurent Morichetti gave be these performance numbers:

The benchmark used is:

  time ./gdb --data-directory=data-directory /extra/lmoriche/hip/samples/0_Intro/bit_extract/bit_extract -ex "set pagination off" -ex "set breakpoint pending on" -ex "b bit_extract_kernel if \$_thread == 5" -ex run -ex c -batch

It measures the time it takes to continue from a conditional breakpoint with
2048 threads at that breakpoint, one of them reporting the breakpoint.

baseline:
real    0m10.227s
real    0m10.177s
real    0m10.362s

with patch:
real    0m8.356s
real    0m8.424s
real    0m8.494s

[1] https://github.com/ROCm-Developer-Tools/ROCgdb

gdb/ChangeLog:

* regcache.c (ptid_regcache_map): New type.
(target_ptid_regcache_map): New type.
(regcaches): Change type to target_ptid_regcache_map.
(get_thread_arch_aspace_regcache): Update to regcaches' new
type.
(regcache_thread_ptid_changed): Likewise.
(registers_changed_ptid): Likewise.
(regcaches_size): Likewise.
(regcaches_test): Update.
(regcache_thread_ptid_changed): Update.
* regcache.h (regcache_up): New type.
* gdbsupport/ptid.h (hash_ptid): New struct.

Change-Id: Iabb0a1111707936ca111ddb13f3b09efa83d3402

4 years agogdb: pass target to thread_ptid_changed observable
Simon Marchi [Fri, 7 Aug 2020 14:59:33 +0000 (10:59 -0400)]
gdb: pass target to thread_ptid_changed observable

I noticed what I think is a potential bug.  I did not observe it nor was
I able to reproduce it using actual debugging.  It's quite unlikely,
because it involves multi-target and ptid clashes.  I added selftests
that demonstrate it though.

The thread_ptid_changed observer says that thread with OLD_PTID now has
NEW_PTID.  Now, if for some reason we happen to have two targets
defining a thread with OLD_PTID, the observers don't know which thread
this is about.

regcache::regcache_thread_ptid_changed changes all regcaches with
OLD_PTID.  If there is a regcache for a thread with ptid OLD_PTID, but
that belongs to a different target, this regcache will be erroneously
changed.

Similarly, infrun_thread_ptid_changed updates inferior_ptid if
inferior_ptid matches OLD_PTID.  But if inferior_ptid currently refers
not to the thread is being changed, but to a thread with the same ptid
belonging to a different target, then inferior_ptid will erroneously be
changed.

This patch adds a `process_stratum_target *` parameter to the
`thread_ptid_changed` observable and makes the two observers use it.
Tests for both are added, which would fail if the corresponding fix
wasn't done.

gdb/ChangeLog:

* observable.h (thread_ptid_changed): Add parameter
`process_stratum_target *`.
* infrun.c (infrun_thread_ptid_changed): Add parameter
`process_stratum_target *` and use it.
(selftests): New namespace.
(infrun_thread_ptid_changed): New function.
(_initialize_infrun): Register selftest.
* regcache.c (regcache_thread_ptid_changed): Add parameter
`process_stratum_target *` and use it.
(regcache_thread_ptid_changed): New function.
(_initialize_regcache): Register selftest.
* thread.c (thread_change_ptid): Pass target to
thread_ptid_changed observable.

Change-Id: I0599e61224b6d154a7b55088a894cb88298c3c71

4 years agoAdd code for processing version 5 DWP files (for use with DWARF v5).
Caroline Tice [Fri, 7 Aug 2020 00:16:45 +0000 (17:16 -0700)]
Add code for processing version 5 DWP files (for use with DWARF v5).

The DWARF v5 Spec describes a (slightly) new format for V5 .dwp files.
    This patch updates GDB to allow it to read/process .dwp files in the
    new DWARF v5 format, while continuing to be able to read/process .dwp files
    in the older V1 & V2 formats (older, pre-standard formats).

    The two major differences between the V2 and the V5 format are:
        - The inclusion of DWARF-v5-specific sections:
              .debug_loclists.dwo
              .debug_rnglists.dwo
        - The .dwp section identifier encodings have changed.  The table below
          shows the old & new encodings.  Notice the re-purposing of 5, 7 & 8
          in particular.

    Val  DW4 section       DW4 section id  DW5 section         DW5 section id
    --- -----------------  --------------  -----------------   --------------
     1  .debug_info.dwo    DW_SECT_INFO    .debug_info.dwo     DW_SECT_INFO
     2  .debug_types.dwo   DW_SECT_TYPES         --              reserved
     3  .debug_abbrev.dwo  DW_SECT_ABBREV  .debug_abbrev.dwo   DW_SECT_ABBREV
     4  .debug_line.dwo    DW_SECT_LINE    .debug_line.dwo     DW_SECT_LINE
     5  .debug_loc.dwo     DW_SECT_LOC     .debug_loclists.dwo DW_SECT_LOCLISTS
     6  .debug_str_offsets.dwo             .debug_str_offsets.dwo
                           DW_SECT_STR_OFFSETS                 DW_SECT_STR_OFFSETS
     7  .debug_macinfo.dwo DW_SECT_MACINFO .debug_macro.dwo    DW_SECT_MACRO
     8  .debug_macro.dwo   DW_SECT_MACRO   .debug_rnglists.dwo DW_SECT_RNGLISTS

4 years agoas: Ignore rest of line on overflow error
H.J. Lu [Fri, 7 Aug 2020 13:46:42 +0000 (06:46 -0700)]
as: Ignore rest of line on overflow error

* read.c (read_a_source_file): Ignore rest of line on overflow
error.

4 years agoMSP430: sim: Increase main memory region size
Jozef Lawrynowicz [Mon, 3 Aug 2020 18:58:33 +0000 (19:58 +0100)]
MSP430: sim: Increase main memory region size

The area between 0xFF00 and 0xFFC0 is unallocated in the simulator
memory map, so extend the main memory region up to 0xFFC0 to allow the
simulator to make use of the extra 192 bytes of space.

sim/msp430/ChangeLog:

* msp430-sim.c (sim_open): Increase the size of the main memory region
to 0xFAC0.

4 years agoAutomatic date update in version.in
GDB Administrator [Fri, 7 Aug 2020 00:00:09 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb: move regcache::regcaches to regcache.c
Simon Marchi [Thu, 6 Aug 2020 20:23:48 +0000 (16:23 -0400)]
gdb: move regcache::regcaches to regcache.c

I don't really understand why `regcache_thread_ptid_changed` is a static
method of `struct regcache` instead of being a static free function in
regcache.c.  And I don't understand why `current_regcache` is a static
member of `struct regcache` instead of being a static global in
regcache.c.  It's not wrong per-se, but there's no other place where we
do it like this in GDB (as far as I remember) and it just exposes things
unnecessarily in the .h.

Move them to be just static in regcache.c.  As a result,
registers_changed_ptid doesn't need to be friend of the regcache class
anymore.

Removing the include of forward_list in regcache.h showed that we were
missing an include for it in dwarf2/index-write.c, record-btrace.c and
sparc64-tdep.c.

gdb/ChangeLog:

* regcache.h (class regcache): Remove friend
registers_changed_ptid.
<regcache_thread_ptid_changed>: Remove.
<regcaches>: Remove.
* regcache.c (regcache::regcaches): Rename to...
(regcaches): ... this.  Make static.
(get_thread_arch_aspace_regcache): Update.
(regcache::regcache_thread_ptid_changed): Rename to...
(regcache_thread_ptid_changed): ... this.  Update.
(class regcache_access): Remove.
(regcaches_test): Update.
(_initialize_regcache): Update.
* sparc64-tdep.c, dwarf2/index-write.c, record-btrace.c: Include
<forward_list>.

Change-Id: Iabc25759848010cfbb7ee7e27f60eaca17d61c12

4 years agogdb: rename regcache::current_regcache to regcache::regcaches
Simon Marchi [Thu, 6 Aug 2020 20:23:36 +0000 (16:23 -0400)]
gdb: rename regcache::current_regcache to regcache::regcaches

The name `current_regcache` for the list of currently-existing regcaches
sounds wrong.  The name is singular, but it holds multiple regcaches, so
it could at least be `current_regcaches`.

But in other places in GDB, "current" usually means "the object we are
working with right now".  For example, we swap the "current thread" when
we want to operate on a given thread.  This is not the case here, this
variable just holds all regcaches that exist at any given time, not "the
regcache we are working with right now".

So, I think calling it `regcaches` is better.  I also considered
`regcache_list`, but a subsequent patch will make it a map and not a
list, so it would sound wrong again.  `regcaches` sounds right for any
collection of regcache, whatever the type.

Rename a few other things that were related to this `current_regcache`
field.  Note that there is a `get_current_regcache` function, which
returns the regcache of the current thread.  That one is fine, because
it returns the regcache for the current thread.

gdb/ChangeLog:

* regcache.h (class regcache) <current_regcache>: Rename to...
<regcaches>: ... this.  Move doc here.
* regcache.c (regcache::current_regcache) Rename to...
(regcache::regcaches): ... this.  Move doc to header.
(get_thread_arch_aspace_regcache): Update.
(regcache::regcache_thread_ptid_changed): Update.
(registers_changed_ptid): Update.
(class regcache_access) <current_regcache_size>: Rename to...
<regcaches_size>: ... this.
(current_regcache_test): Rename to...
(regcaches_test): ... this.
(_initialize_regcache): Update.

Change-Id: I87de67154f5fe17a1f6aee7c4f2036647ee27b99

4 years agogas: Fix internal error on long local labels
Alex Coplan [Thu, 6 Aug 2020 16:39:03 +0000 (17:39 +0100)]
gas: Fix internal error on long local labels

Prior to this commit, on an input such as "88888888888:", GAS hits a
signed integer overflow and likely an assertion failure. I see:

$ echo "88888888888:" | bin/aarch64-none-elf-as
{standard input}: Assembler messages:
{standard input}:1: Internal error in fb_label_name at ../gas/symbols.c:2049.
Please report this bug.

To fix this issue, I've taken two steps:

1. Change the type used for processing local labels in
   read_a_source_file() from int to long, to allow representing more
   local labels, and also since all uses of this variable (temp) are
   actually of type long.

2. Detect if we would overflow and bail out with an error message
   instead of actually overflowing and hitting the assertion in
   fb_label_name().

gas/ChangeLog:

2020-08-06  Alex Coplan  <alex.coplan@arm.com>

* read.c (read_a_source_file): Use long for local labels, detect
overflow and raise an error for overly-long labels.
* testsuite/gas/all/gas.exp: Add local-label-overflow test.
* testsuite/gas/all/local-label-overflow.d: New test.
* testsuite/gas/all/local-label-overflow.l: Error output.
* testsuite/gas/all/local-label-overflow.s: Input.

4 years agoamd64_analyze_prologue: fix incorrect comment
Victor Collod [Wed, 24 Jun 2020 01:28:56 +0000 (18:28 -0700)]
amd64_analyze_prologue: fix incorrect comment

The width of the instruction didn't match the size of its operands.

2020-06-23  Victor Collod  <vcollod@nvidia.com>

* amd64-tdep.c (amd64_analyze_prologue): Fix incorrect comment.

Change-Id: I104ebfe0b3c24bd6a8d0f0c5a791b9676a930a54

4 years agobpf: relocation fixes for eBPF ELF backend
David Faust [Thu, 6 Aug 2020 13:14:54 +0000 (15:14 +0200)]
bpf: relocation fixes for eBPF ELF backend

The eBPF ELF backend was not properly recording relocation addends
during installation, nor reading and applying them when performing
the final relocation. This lead to various issues with incorrect
relocations.

These issues are fixed with a new howto special function to install
the relocations, and updates to bpf_elf_relocate_section to read and
use the addends as recorded in the input_bfd.

bfd/ChangeLog

2020-08-05  David Faust  <david.faust@oracle.com>

* elf64-bpf.c (bpf_elf_generic_reloc): New function.
(bpf_elf_howto_table): Use it here.
(bpf_elf_relocate_section): Use addends recorded in input_bfd for
instruction and data relocations.

ld/ChangeLog

2020-08-05  David Faust  <david.faust@oracle.com>

* testsuite/ld-bpf/call-2.s: New file.
* testsuite/ld-bpf/call-2.d: Likewise.
* testsuite/ld-bpf/reloc-data-be.d: Likewise.
* testsuite/ld-bpf/reloc-data-le.d: Likewise.
* testsuite/ld-bpf/reloc-data.s: Likewise.
* testsuite/ld-bpf/reloc-insn-external-be.d: Likewise.
* testsuite/ld-bpf/reloc-insn-external-le.d: Likewise.
* testsuite/ld-bpf/reloc-insn-external.s: Likewise.
* testsuite/ld-bpf/reloc-insn32-be.d: Likewise.
* testsuite/ld-bpf/reloc-insn32-le.d: Likewise.
* testsuite/ld-bpf/reloc-insn32.s: Likewise.
* testsuite/ld-bpf/reloc-insn64-be.d: Likewise.
* testsuite/ld-bpf/reloc-insn64-le.d: Likewise.
* testsuite/ld-bpf/reloc-insn64.s: Likewise.

4 years agoMSP430: ld: Update output section tail when shuffling ".either" sections
Jozef Lawrynowicz [Wed, 5 Aug 2020 11:55:07 +0000 (12:55 +0100)]
MSP430: ld: Update output section tail when shuffling ".either" sections

The MSP430 linker shuffles input sections with names beginning with
".either" between the upper and lower memory regions, to try to avoid
one region overflowing when there is space in the other region.

However, when an ".either" input section attached to the tail of an
output section was moved to a different output section in the other
region, that tail wasn't being updated to the new section at the end
of the original output section.

This caused a bug where a shuffled section could end up in the
middle of another section in the output executable, resulting in
corrupted code or data.

When changing the output section of an input section attached to the
tail of its output section, that tail is now updated to point to
the new input section at the end of the section list.

ld/ChangeLog:

2020-08-06  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

* emultempl/msp430.em (change_output_section): Update the tail
of the output section statement list when moving the original
tail to a different output section.
(eval_upper_either_sections): Don't move sections from the upper
region to the lower region unless the upper region is
overflowing.

4 years agoDon't output null pathname in core_target::build_file_mappings warning
Kevin Buettner [Thu, 6 Aug 2020 01:29:33 +0000 (18:29 -0700)]
Don't output null pathname in core_target::build_file_mappings warning

While looking into the regressions reported by Luis Machado, I noticed
that null pathnames were being output in the warnings.  E.g.

warning: Can't open file (null) during file-backed mapping note processing

I've changed the warning to output the pathname found in the note,
like this:

warning: Can't open file /var/lib/docker/aufs/diff/d07c...e21/lib/x86_64-linux-gnu/libc-2.27.so during file-backed mapping note processing

(I've shortened one of the path elements above.)

gdb/ChangeLog:

* corelow.c (core_target::build_file_mappings): Don't output
null pathname in warning.

4 years agoAutomatic date update in version.in
GDB Administrator [Thu, 6 Aug 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agogdb/testsuite: link some dwarf2 tests with nopie
Simon Marchi [Wed, 5 Aug 2020 21:38:28 +0000 (17:38 -0400)]
gdb/testsuite: link some dwarf2 tests with nopie

I noticed some gdb.dwarf2 tests not running on my machine because of
this:

    Running /home/simark/src/binutils-gdb/gdb/testsuite/gdb.dwarf2/dw2-single-line-discriminators.exp ...
    gdb compile failed, /usr/bin/ld: /home/simark/build/binutils-gdb/gdb/testsuite/outputs/gdb.dwarf2/dw2-single-line-discriminators/dw2-single-line-discriminators0.o: relocation R_X86_64_32S against
     symbol `x' can not be used when making a PIE object; recompile with -fPIE
    collect2: error: ld returned 1 exit status

We get this when the target toolchain produces position-independent
executables by default.  These tests are built from some assembly which
produces some relocations incompatible with position-independent
executables.

Add `nopie` to the compilation flags of these tests to force the
toolchain to produce non-position-independent executables.  With this,
the changed tests run successfully on my machine.

gdb/ChangeLog:

* gdb.dwarf2/clztest.exp, gdb.dwarf2/dw2-common-block.exp,
gdb.dwarf2/dw2-dup-frame.exp, gdb.dwarf2/dw2-reg-undefined.exp,
gdb.dwarf2/dw2-single-line-discriminators.exp,
dw2-undefined-ret-addr.exp: Pass nopie to compilation options.

Change-Id: Ie06c946f8e56a6030be247d1c57f416fa8b67e4c

4 years agoFix variant part regressions with older Rust compiler
Tom Tromey [Wed, 5 Aug 2020 15:52:55 +0000 (09:52 -0600)]
Fix variant part regressions with older Rust compiler

Older Rust compilers used special field names, rather than DWARF
features, to express the variant parts of Rust enums.  This is handled
in gdb through a quirk recognizer that rewrites the types.

Tom de Vries pointed out in PR rust/26197 that the variant part
rewrite regressed this code.  This patch fixes the problems:

* Univariant enums were not handled properly.  Now we simply call
  alloc_rust_variant for these as well.

* There was an off-by-one error in the handling of ordinary enums.

* Ordinary enums should have the size of their member types reset to
  match the size of the enclosing enum.  (It's not clear to me if this
  is truly necessary, but it placates a test, and this is just legacy
  handling in any case.)

Tested with Rust 1.12.0, 1.14.0, 1.19.0, 1.36.0, and 1.45.0 on x86-64
Fedora 32.  There were some unrelated failures with 1.14.0 and 1.19,0;
but considering that these are fairly old releases, I don't plan to
look into them unless someone complains.

Note that this patch will not fix all the issues in the PR.  In that
PR, Tom is using a somewhat unusual build of Rust -- in particular it
uses an older (pre-DWARF variant part) LLVM with a newer Rust.  I
believe this compiler doesn't correctly implement the old-style name
fallback; the details are in the bug.

gdb/ChangeLog
2020-08-05  Tom Tromey  <tromey@adacore.com>

PR rust/26197:
* dwarf2/read.c (alloc_rust_variant): Handle univariant case.
(quirk_rust_enum): Call alloc_rust_variant for univariant case.
Fix off-by-one and type size errors in ordinary case.

4 years agoMSP430: sim: Fix incorrect simulation of unsigned widening multiply
Jozef Lawrynowicz [Tue, 28 Jul 2020 09:36:10 +0000 (10:36 +0100)]
MSP430: sim: Fix incorrect simulation of unsigned widening multiply

Operand sizes used for simulation of MSP430 hardware multiply
operations are not aligned with the sizes used on the target, resulting
in the simulator storing signed operands with too much precision.

Additionally, simulation of unsigned multiplication is missing explicit
casts to prevent any implicit sign extension.

gcc.c-torture/execute/pr91450-1.c uses unsigned widening multiplication
of 32-bit operands -4 and 2, to produce a 64-bit result:
0xffff fffc * 0x2 = 0x1 ffff fff8

If -4 is stored in 64-bit precision, then the multiplication is
essentially signed and the result is -8 in 64-bit precision
(0xffff ffff ffff fffc), which is not correct.

sim/msp430/ChangeLog:

* msp430-sim.c (put_op): For unsigned multiplication, explicitly cast
operands to the unsigned type before multiplying.
* msp430-sim.h (struct msp430_cpu_state): Fix types used to store hwmult
operands.

sim/testsuite/sim/msp430/ChangeLog:

* mpyull_hwmult.s: New test.

4 years ago[gdb] Fix prop->const_val uses in gdbtypes.c
Tom de Vries [Wed, 5 Aug 2020 10:31:58 +0000 (12:31 +0200)]
[gdb] Fix prop->const_val uses in gdbtypes.c

After commit 66d6346b25 "gdb: remove TYPE_DYN_PROP_ADDR", I run into:
...
FAIL: gdb.fortran/class-allocatable-array.exp: print this%_data%b
...
(and 185 more FAILs, all for fortran test-cases).

The commit replaces "!x" by "x != 0".

Fix this by using "x == 0" instead.

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-08-05  Tom de Vries  <tdevries@suse.de>

* gdbtypes.c (type_not_allocated, type_not_associated): Use
"prop->const_val () == 0" instead of "prop->const_val () != 0".

4 years agoRevert "PR26337, Malloc size error in objdump"
Alan Modra [Wed, 5 Aug 2020 08:08:26 +0000 (17:38 +0930)]
Revert "PR26337, Malloc size error in objdump"

This reverts commit 0b97e818464a42305c8243a980a5c13967554fd9.

4 years agoPR26337, Malloc size error in objdump
Alan Modra [Wed, 5 Aug 2020 00:33:00 +0000 (10:03 +0930)]
PR26337, Malloc size error in objdump

A malloc failure triggered by a fuzzed object file isn't a real
problem unless objdump doesn't exit cleanly after the failure, which
it does.  However we have bfd_malloc_and_get_section to sanity check
size of uncompressed sections before allocating memory.  Use it.

PR 26337
* objdump.c (load_specific_debug_section): Don't malloc space for
section contents, use bfd_malloc_and_get_section.

4 years agoAutomatic date update in version.in
GDB Administrator [Wed, 5 Aug 2020 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoZ8k: fix sout/soudb opcodes with direct address
Christian Groessler [Tue, 4 Aug 2020 20:29:15 +0000 (22:29 +0200)]
Z8k: fix sout/soudb opcodes with direct address

Problem found by Tadashi G. Takaoka.

2020-08-04  Christian Groessler  <chris@groessler.org>
     Tadashi G. Takaoka <tadashi.g.takaoka@gmail.com>

 * z8kgen.c (opt): Fix "sout imm16,rs" and "soutb imm16,rbs"
 opcodes (special "out" to absolute address).
 * z8k-opc.h: Regenerate.

2020-08-04  Christian Groessler  <chris@groessler.org>

 * gas/testsuite/gas/z8k/inout.d: Adapt to correct encoding of
 "sout/soutb #imm,reg"

4 years agogdb: use bool in frame code
Simon Marchi [Tue, 4 Aug 2020 18:53:10 +0000 (14:53 -0400)]
gdb: use bool in frame code

Change instances of int variables and return values used as boolean
values to use the bool type.

Shorten the comments of a few functions, because I think they go a bit
too much in implementation details, which appear out of date anyway.

Make other misc changes to the functions that are already being changed,
such as using nullptr instead of NULL, dropping `struct` keywords and
declaring variables when first used.

gdb/ChangeLog:

* frame.h (frame_id_p): Return bool.
(frame_id_artificial_p): Return bool.
(frame_id_eq): Return bool.
(has_stack_frames): Return bool.
(get_selected_frame): Fix typo in comment.
(get_frame_pc_if_available): Return bool.
(get_frame_address_in_block_if_available): Return bool.
(get_frame_func_if_available): Return bool.
(read_frame_register_unsigned): Return bool.
(get_frame_register_bytes): Return bool.
(safe_frame_unwind_memory): Return bool.
(deprecated_frame_register_read): Return bool.
(frame_unwinder_is): Return bool.
* frame.c (struct frame_info) <prev_arch::p>: Change type to
bool.
<this_id::p>: Likewise.
<prev_p>: Likewise.
(frame_stash_add): Return bool.
(get_frame_id): Use bool.
(frame_id_build_special) Use bool.
(frame_id_build_unavailable_stack): Use bool.
(frame_id_build): Use bool.
(frame_id_p): Return bool, use true/false instead of 1/0.
(frame_id_artificial_p): Likewise.
(frame_id_eq): Likewise.
(frame_id_inner): Likewise.
(get_frame_func_if_available): Likewise.
(read_frame_register_unsigned): Likewise.
(deprecated_frame_register_read): Likewise.
(get_frame_register_bytes): Likewise.
(has_stack_frames): Likewise.
(inside_main_func): Likewise.
(inside_entry_func): Likewise.
(get_frame_pc_if_available): Likewise.
(get_frame_address_in_block_if_available): Likewise.
(frame_unwinder_is): Likewise.
(safe_frame_unwind_memory): Likewise.
(frame_unwind_arch): Likewise.

Change-Id: I6121fa56739b688be79d73d087d76b268ba5a46a

4 years agogdb: change frame_info::prev_func::p type to cached_copy_status
Simon Marchi [Tue, 4 Aug 2020 18:52:44 +0000 (14:52 -0400)]
gdb: change frame_info::prev_func::p type to cached_copy_status

One might think that variable `frame_info::prev_func::p` is a simple
true/false value, but that's not the case, it can also have the value -1
to mean "unavaiable".  Change it to use the `cached_copy_status` enum,
which seems designed exactly for this purpose.

Rename to `status` to be consistent with `prev_pc::status` (and be cause
`p` means `predicate`, which implies boolean, which this is not).

gdb/ChangeLog:

* frame.c (frame_info) <prev_func> <p>: Rename to status, change
type to cached_copy_status.
(fprintf_frame): Adjust.
(get_frame_func_if_available): Adjust.
(frame_cleanup_after_sniffer): Adjust.

Change-Id: I50c6ebef6c0acb076e25c741f7f417bfd101d953

4 years agoUpdate email address in MAINTAINERS
Mark Wielaard [Tue, 4 Aug 2020 18:44:10 +0000 (20:44 +0200)]
Update email address in MAINTAINERS

gdb/ChangeLog:

* MAINTAINERS (Write After Approval): Update email address.

4 years agogdb: remove TYPE_DYN_PROP_ADDR
Simon Marchi [Tue, 4 Aug 2020 18:47:39 +0000 (14:47 -0400)]
gdb: remove TYPE_DYN_PROP_ADDR

Remove TYPE_DYN_PROP_ADDR, replacing its uses with calling
dynamic_prop::const_val directly.

gdb/ChangeLog:

* gdbtypes.h (TYPE_DYN_PROP_ADDR): Remove, replace uses with
dynamic_prop::const_val.

Change-Id: Ie99b9cd9a0627488c1c69a75e57f020d34e392af

4 years agogdb: remove TYPE_DYN_PROP_KIND
Simon Marchi [Tue, 4 Aug 2020 18:47:36 +0000 (14:47 -0400)]
gdb: remove TYPE_DYN_PROP_KIND

Replace uses with calling the dynamic_prop::kind method directly.

gdb/ChangeLog:

* gdbtypes.h (TYPE_DYN_PROP_KIND): Remove, replace uses with
dynamic_prop::kind.

Change-Id: I78a3e2890f0b3e3950e9a19ad657b976cbb9610b

4 years agogdb: remove TYPE_DYN_PROP_BATON
Simon Marchi [Tue, 4 Aug 2020 18:47:09 +0000 (14:47 -0400)]
gdb: remove TYPE_DYN_PROP_BATON

This macro is now unused.

gdb/ChangeLog:

* gdbtypes.h (TYPE_DYN_PROP_BATON): Remove.

Change-Id: I6daead794f7ecb516cc59f9e05262c894515fad3

4 years agosim: generated files for the eBPF simulator
Jose E. Marchesi [Tue, 4 Aug 2020 16:11:31 +0000 (18:11 +0200)]
sim: generated files for the eBPF simulator

This patch adds the CGEN generated files for the eBPF simulator.

sim/ChangeLog:

2020-08-04  Jose E. Marchesi  <jose.marchesi@oracle.com>
    David Faust <david.faust@oracle.com>

* bpf/arch.c: Likewise.
* bpf/arch.h: Likewise.
* bpf/cpu.c: Likewise.
* bpf/cpu.h: Likewise.
* bpf/cpuall.h: Likewise.
* bpf/decode-be.c: Likewise.
* bpf/decode-be.h: Likewise.
* bpf/decode-le.c: Likewise.
* bpf/decode-le.h: Likewise.
* bpf/defs-be.h: Likewise.
* bpf/defs-le.h: Likewise.
* bpf/sem-be.c: Likewise.
* bpf/sem-le.c: Likewise.

4 years agosim: eBPF simulator
Jose E. Marchesi [Tue, 4 Aug 2020 16:09:16 +0000 (18:09 +0200)]
sim: eBPF simulator

This patch introduces the basics of an instruction-simulator for eBPF.
The simulator is based on CGEN.

gdb/ChangeLog:

2020-08-04  Jose E. Marchesi  <jose.marchesi@oracle.com>

* configure.tgt: Set gdb_sim for bpf-*-* targets.

sim/ChangeLog:

2020-08-04  Jose E. Marchesi  <jose.marchesi@oracle.com>
    David Faust <david.faust@oracle.com>

* configure.tgt (sim_arch): Add entry for bpf-*-*.
* configure: Regenerate.
* MAINTAINERS: Add maintainer for the BPF simulator.
* bpf/Makefile.in: New file.
* bpf/bpf-helpers.c: Likewise.
* bpf/bpf-helpers.def: Likewise.
* bpf/bpf-helpers.h: Likewise.
* bpf/bpf-sim.h: Likewise.
* bpf/bpf.c: Likewise.
* bpf/config.in: Likewise.
* bpf/configure.ac: Likewise.
* bpf/decode.h: Likewise.
* bpf/eng.h: Likewise.
* bpf/mloop.in: Likewise.
* bpf/sim-if.c: Likewise.
* bpf/sim-main.h: Likewise.
* bpf/traps.c: Likewise.
* bpf/configure: Generate.
* bpf/aclocal.m4: Likewise.

sim/testsuite/ChangeLog:

2020-08-04  David Faust  <david.faust@oracle.com>
    Jose E. Marchesi  <jose.marchesi@oracle.com>

* configure: Regenerate.
* sim/bpf/allinsn.exp: New file.
* sim/bpf/alu.s: Likewise.
* sim/bpf/alu32.s: Likewise.
* sim/bpf/endbe.s: Likewise.
* sim/bpf/endle.s: Likewise.
* sim/bpf/jmp.s: Likewise.
* sim/bpf/jmp32.s: Likewise.
* sim/bpf/ldabs.s: Likewise.
* sim/bpf/mem.s: Likewise.
* sim/bpf/mov.s: Likewise.
* sim/bpf/testutils.inc: Likewise.
* sim/bpf/xadd.s: Likewise.

4 years agogdb: support for eBPF
Jose E. Marchesi [Tue, 4 Aug 2020 16:01:55 +0000 (18:01 +0200)]
gdb: support for eBPF

This patch adds basic support for the eBPF target: tdep and build
machinery.  The accompanying simulator is introduced in subsequent
patches.

gdb/ChangeLog:

2020-08-04  Weimin Pan <weimin.pan@oracle.com>
    Jose E. Marchesi  <jose.marchesi@oracle.com>

* configure.tgt: Add entry for bpf-*-*.
* Makefile.in (ALL_TARGET_OBS): Add bpf-tdep.o
(ALLDEPFILES): Add bpf-tdep.c.
* bpf-tdep.c: New file.
* MAINTAINERS: Add bpf target and maintainer.

gdb/doc/ChangeLog:

2020-08-04  Jose E. Marchesi  <jose.marchesi@oracle.com>

* gdb.texinfo (Contributors): Add information for the eBPF
support.
(BPF): New section.

4 years agogdb/testsuite: Use 'array unset' instead of just 'unset'
Andrew Burgess [Tue, 4 Aug 2020 11:13:37 +0000 (12:13 +0100)]
gdb/testsuite: Use 'array unset' instead of just 'unset'

In the check-test-names.exp library 'unset' was being used to unset an
array variable.  Though this seems to work fine on tcl 8.6, it was
discovered on a CentOS 7.8.2003 machine, running tcl 8.5, that this
doesn't work and 'array unset' should be used instead.

Using 'array unset' should work fine for newer and older versions of
tcl (since 8.3, releases ~2000).

gdb/testsuite/ChangeLog:

* lib/check-test-names.exp (do_reset_vars): Use 'array unset' to
unset the array variable.

4 years agogas/NEWS: Mention {disp16} pseudo prefix
H.J. Lu [Tue, 4 Aug 2020 12:55:31 +0000 (05:55 -0700)]
gas/NEWS: Mention {disp16} pseudo prefix

* NEWS: Mention {disp16} pseudo prefix.

4 years agogas: Revert an accidental change in x86-64-pseudos.d
H.J. Lu [Tue, 4 Aug 2020 12:50:12 +0000 (05:50 -0700)]
gas: Revert an accidental change in x86-64-pseudos.d

Revert an accidental change in

commit 41eb8e88859b297f59f4d093aab9306d4b7057d9
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Jul 30 16:13:02 2020 -0700

    x86: Add {disp16} pseudo prefix

@@ -304,7 +308,7 @@ Disassembly of section .text:
  +[a-f0-9]+:  40 d3 e0                rex shl %cl,%eax
  +[a-f0-9]+:  40 a0 01 00 00 00 00 00 00 00    rex movabs 0x1,%al
  +[a-f0-9]+:  40 38 ca                rex cmp %cl,%dl
- +[a-f0-9]+:  40 b3 01                rex mov \$(0x)?1,%bl
+ +[a-f0-9]+:  40 b3 01                rex mov \$(0x)1,%bl
  +[a-f0-9]+:  f2 40 0f 38 f0 c1       rex crc32 %cl,%eax
  +[a-f0-9]+:  40 89 c3                rex mov %eax,%ebx
  +[a-f0-9]+:  41 89 c6                mov    %eax,%r14d

PR gas/26305
* testsuite/gas/i386/x86-64-pseudos.d: Revert an accidental
change.

4 years agogas: Use udata for DW_AT_high_pc when emitting DWARF4
Mark Wielaard [Mon, 3 Aug 2020 20:02:24 +0000 (22:02 +0200)]
gas: Use udata for DW_AT_high_pc when emitting DWARF4

For DWARF4 DW_AT_high_pc can be expressed as constant offset from
DW_AT_low_pc which saves a relocation. Use DW_FORM_udate (uleb128)
to keep the constant value as small as possible.

gas/ChangeLog:

       * dwarf2dbg.c (out_debug_abbrev): When DWARF2_VERSION >= 4, use
       DW_FORM_udata for DW_AT_high_pc.
       (out_debug_info): Use emit_leb128_expr for DW_AT_high_pc, when
       DWARF2_VERSION >= 4.
       * read.c (emit_leb128_exp): No longer static.
       * read.h (emit_leb128_exp): Define.

4 years agogas: Make sure .debug_line file table contains a zero filename and dir
Mark Wielaard [Mon, 3 Aug 2020 00:23:44 +0000 (02:23 +0200)]
gas: Make sure .debug_line file table contains a zero filename and dir

For DWARF5 the zero file list entry in the .debug_line table represents
the compile unit main file. It can be set with .file 0 when -gdwarf-5
is given. But since this directive is illegal for older versions, this
is almost never set. To make sure it is always set (so DW_AT_name of
the compile unit can be set) use file (and dir) 1 if that is defined
(otherwise fall back to pwd, to match DW_AT_comp_dir).

gas/ChangeLog:

* gas/dwarf2dbg.c (out_dir_and_file_list): For DWARF5 emit at
least one directory if there is at least one file. Use dirs[1]
if dirs[0] is not set, or if there is no dirs[1] the current
working directory. Use files[1] filename, when files[0] filename
isn't set.

4 years agogas: Fix .debug_info CU header for --gdwarf-5
Mark Wielaard [Mon, 3 Aug 2020 00:04:17 +0000 (02:04 +0200)]
gas: Fix .debug_info CU header for --gdwarf-5

DWARF5 CU headers have a new unit type field and move the abbrev offset
to the end of the header.

gas/ChangeLog:

* dwarf2dbg.c (out_debug_info): Emit unit type and abbrev offset
for DWARF5.
* gas/testsuite/gas/elf/dwarf-4-cu.d: New file.
* gas/testsuite/gas/elf/dwarf-4-cu.s: Likewise.
* gas/testsuite/gas/elf/dwarf-5-cu.d: Likewise.
* gas/testsuite/gas/elf/dwarf-5-cu.s: Likewise.
* testsuite/gas/elf/elf.exp: Run dwarf-4-cu and dwarf-5-cu.

4 years agogas: Fix as.texi typo infortmation
Mark Wielaard [Sun, 2 Aug 2020 16:55:52 +0000 (18:55 +0200)]
gas: Fix as.texi typo infortmation

gas/ChangeLog:

* doc/as.texi (--gdwarf-[345]): Fix typo.

4 years ago[gdb/symtab] Handle invalid partial DIE reference
Tom de Vries [Tue, 4 Aug 2020 09:16:37 +0000 (11:16 +0200)]
[gdb/symtab] Handle invalid partial DIE reference

When reverting commit 9cfd2b89bd "[gdb/testsuite] Fix
gdb.arch/amd64-entry-value-paramref.S", we run into an internal-error:
...
(gdb) file amd64-entry-value-paramref^M
Reading symbols from amd64-entry-value-paramref...^M
src/gdb/dwarf2/read.c:18903: internal-error: could not find partial DIE
  0x1b7 in cache [from module amd64-entry-value-paramref]^M

A problem internal to GDB has been detected,^M
further debugging may prove unreliable.^M
...
because of invalid dwarf.

In contrast, when using -readnow, we have:
...
(gdb) file -readnow amd64-entry-value-paramref
Reading symbols from amd64-entry-value-paramref...
Expanding full symbols from amd64-entry-value-paramref...
Dwarf Error: Cannot find DIE at 0x1b7 referenced from DIE at 0x11a \
  [in module amd64-entry-value-paramref]
(gdb)
...

Change the internal error into a Dwarf Error, such that we have:
...
(gdb) file amd64-entry-value-paramref^M
Reading symbols from amd64-entry-value-paramref...^M
Dwarf Error: Cannot not find DIE at 0x1b7 \
  [from module amd64-entry-value-paramref]^M
^M
(No debugging symbols found in amd64-entry-value-paramref)^M
(gdb)
...

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-08-04  Tom de Vries  <tdevries@suse.de>

PR symtab/23270
* dwarf2/read.c (find_partial_die): Change internal error into Dwarf
Error.

4 years agoAutomatic date update in version.in
GDB Administrator [Tue, 4 Aug 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoUpdate FreeBSD system calls for 13.0-CURRENT.
John Baldwin [Mon, 3 Aug 2020 16:47:17 +0000 (09:47 -0700)]
Update FreeBSD system calls for 13.0-CURRENT.

This matches the current set of system calls in the FreeBSD head
development branch as of r363367.  Some of these system calls
were also included in 12.1 release.

gdb/ChangeLog:

* syscalls/freebsd.xml: Regenerate.

4 years agoFix script name in usage and generated year range.
John Baldwin [Mon, 3 Aug 2020 16:47:17 +0000 (09:47 -0700)]
Fix script name in usage and generated year range.

gdb/ChangeLog:

* syscalls/update-freebsd.sh: Fix usage and year range.

4 years agoMSP430: Remove unused -md GAS option
Jozef Lawrynowicz [Mon, 3 Aug 2020 14:04:58 +0000 (15:04 +0100)]
MSP430: Remove unused -md GAS option

The MSP430 GAS option "-md" is supposed to indicate that the CRT startup
code should copy data from ROM to RAM at startup. However, this option
has no effect; GAS handles the related behaviour automatically by
looking for the presence of certain symbols in the input file.

gas/ChangeLog:

* config/tc-msp430.c (OPTION_MOVE_DATA): Remove.
(md_parse_option): Remove case for OPTION_MOVE_DATA.
(md_longopts): Remove "md" entry.
(md_show_usage): Likewise.

4 years ago[gdb/symtab] Ignore DW_LNE_lo_user/DW_LNE_hi_user range
Tom de Vries [Mon, 3 Aug 2020 14:59:20 +0000 (16:59 +0200)]
[gdb/symtab] Ignore DW_LNE_lo_user/DW_LNE_hi_user range

When reading an exec with a .debug_line section containing a vendor-specific
extended opcode, we get:
...
$ gdb -batch -iex "set complaints 10" dw2-vendor-extended-opcode
During symbol reading: mangled .debug_line section
...
and reading of the .debug_line section is abandoned.

The vendor-specific extended opcode should be ignored, as specified in the
DWARF standard (7.1 Vendor Extensibility).  [ FWIW, vendor-specific
standard opcodes are already ignored. ]

Fix this by ignoring all vendor-specific extended opcodes.

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-08-03  Tom de Vries  <tdevries@suse.de>

PR symtab/26333
* dwarf2/read.c (dwarf_decode_lines_1): Ignore
DW_LNE_lo_user/DW_LNE_hi_user range.

gdb/testsuite/ChangeLog:

2020-08-03  Tom de Vries  <tdevries@suse.de>

PR symtab/26333
* lib/dwarf.exp (DW_LNE_user): New proc.
* gdb.dwarf2/dw2-vendor-extended-opcode.c: New test.
* gdb.dwarf2/dw2-vendor-extended-opcode.exp: New file.

4 years agoasan: alpha-vms: buffer overflow in vms_traverse_index
Alan Modra [Mon, 3 Aug 2020 13:44:57 +0000 (23:14 +0930)]
asan: alpha-vms: buffer overflow in vms_traverse_index

* vms-lib.c (vms_traverse_index): Sanity check size remaining
before accessing vms_idx or vms_elfidx.

4 years agoPR26330, Malloc size error in objdump
Alan Modra [Mon, 3 Aug 2020 01:31:27 +0000 (11:01 +0930)]
PR26330, Malloc size error in objdump

PR 26330
* elf.c (_bfd_elf_get_symtab_upper_bound): Sanity check symbol table
size against file size.  Correct LONG_MAX limit check.
(_bfd_elf_get_dynamic_symtab_upper_bound): Likewise.
(_bfd_elf_get_reloc_upper_bound): Don't check file size if writing.
(_bfd_elf_get_dynamic_reloc_upper_bound): Likewise.
* elf64-x86-64-.c (elf_x86_64_get_synthetic_symtab): Use
bfd_malloc_and_get_section.

4 years agoUse xmalloc rather than malloc
Alan Modra [Mon, 3 Aug 2020 01:29:38 +0000 (10:59 +0930)]
Use xmalloc rather than malloc

As far as I can tell, the following comment is false nowadays.
/* Calls to m-alloc get turned by sed into xm-alloc.  */

Remove it, and call xmalloc.

* ldlex.l (yy_create_string_buffer): Use xmalloc rather than malloc.
* lexsup.c (parse_args): Likewise.

4 years agoPR26328, Compilation warning when building ld v2.35 with MinGW
Alan Modra [Mon, 3 Aug 2020 01:28:11 +0000 (10:58 +0930)]
PR26328, Compilation warning when building ld v2.35 with MinGW

PR 26328
* configure.ac: AC_CHECK_DECLS asprintf.
* configure: Regenerate.
* config.in: Regenerate.

4 years agoTidy objdump_symstuff and objdump_dynsymstuff
Alan Modra [Mon, 3 Aug 2020 01:27:09 +0000 (10:57 +0930)]
Tidy objdump_symstuff and objdump_dynsymstuff

* testsuite/ld-elfvers/vers.exp (objdump_symstuff): Remove unused
variable.  Init list_a and list_b to empty.
(objdump_dynsymstuff): Likewise, and remove undefined list_a
handling.
* testsuite/ld-elfweak/elfweak.exp (objdump_symstuff): Similarly.
(objdump_dynsymstuff): Similarly.

4 years agoAutomatic date update in version.in
GDB Administrator [Mon, 3 Aug 2020 00:00:07 +0000 (00:00 +0000)]
Automatic date update in version.in

4 years agoAutomatic date update in version.in
GDB Administrator [Sun, 2 Aug 2020 00:00:06 +0000 (00:00 +0000)]
Automatic date update in version.in