Enable gdb.cp/ambiguous.exp with GCC and clang

gdb.cp/ambiguous.exp failed to build using clang with the following
error:

 gdb compile failed, /gdbtest/src/gdb/testsuite/gdb.cp/ambiguous.cc:70:36:
   warning: direct base 'A1' is inaccessible due to ambiguity:
     class JVA1 -> class KV -> class A1
     class JVA1 -> class A1 [-Winaccessible-base]
 class JVA1 : public KV, public LV, public A1 {
                                   ^~~~~~~~~

This commit builds this testcase with -Wno-inaccessible-base when
using clang, to avoid this failure.

Furthermore, gdb.cp/ambiguous.exp has been disabled when using GCC
since 1998.  This commit enables this testcase, building with
-Wno-inaccessible-base when using GCC >= 10.1, and -w otherwise.

gdb/testsuite/ChangeLog:

* gdb.cp/ambiguous.exp: Enable test when compiling with GCC.
Add additional_flags=-Wno-inaccessible-base when compiling
with GCC >= 10.1 or clang.  Add additional_flags=-w when
compiling with GCC < 10.

PR26505, ASAN: xstormy16_elf_relax_section elf32-xstormy16.c:595

PR 26505
* elf32-xstormy16.c (xstormy16_elf_relax_section): Check
is_elf_hash_table before accessing elf fields.

PR26504, ASAN: parse_disassembler_options vax-dis.c:142

PR 26504
* vax-dis.c (parse_disassembler_options): Always add at least one
to entry_addr_total_slots.

PR26501, ASAN: tic54x_undefined_symbol tc-tic54x.c:5015

PR26501
* gas/config/tc-tic54x.c (tic54x_undefined_symbol): Properly treat
misc_symbol_hash entries without values.

PR26500, ASAN: tic4x_inst_make tc-tic4x.c:1247

PR 26500
* tc-tic4x.c (tic4x_inst_make): Don't die on terminating insn
with name = "".

PR26482, ASAN: _bfd_xcoff_sizeof_headers coff-rs6000.c:2585

PR 26482
* coff-rs6000.c (_bfd_xcoff_sizeof_headers): Ignore sections that
won't be output.

PR26463, ASAN: m32c_elf_relax_section elf32-m32c.c:1448

PR 26463
* elf32-m32c.c (m32c_elf_relax_section): Check is_elf_hash_table
before accessing elf fields.

PR26452, ASAN: som_compute_checksum som.c:4293

PR 26452
* som.c (som_compute_checksum): XOR 32-bit words in header,
not unsigned long sized words.

PR26441, ASAN: get_b_cc tc-cr16.c:1521

PR 26441
* config/tc-cr16.c (get_b_cc): Return NULL early if op isn't
two or three chars, and don't bother copying.

PR26430, ASAN: nacl_modify_segment_map elf-nacl.c:164

PR 26430
* elf-nacl.c (nacl_modify_segment_map): Correct alloc size and
amount copied for elf_segment_map defined with one element
sections array.

PR26426, ASAN: neon_quad tc-arm.c:15175

PR 26426
* config/tc-arm.c (do_neon_mvn, do_neon_swp): Bail out on
NS_NULL shape.

PR26422, ASAN: elf32_arm_final_link_relocate elf32-arm.c:10351

Always reading 32 bits in order to extract addends from instruction
fields is wrong when the field size is smaller.  It also leads to
reading past the end of the section.  This patch tidies that by
reading the proper field size, which allows some later refetching of
addends to disappear.

PR 26422
* elf32-arm.c (elf32_arm_final_link_relocate): Use the appropriate
bfd_get_x size function to read addends out of fields.  Apply
rightshift adjustment too.  Don't apply the now unnecessary
howto->size shift to branch REL addends.  Don't refetch R_ARM_ABS8
and R_ARM_ABS16 addends.  Don't refetch thumb branch addends.
Correct R_ARM_THM_JUMP6 addend.

PR26419, ASAN: mn10300_elf_relax_section elf-m10300.c:3943

PR 26419
* elf-m10300.c (mn10300_elf_relax_section): Don't attempt access
before start of section.

PR26410, UBSAN: symbols.c:1818

Don't memset(0,0,0).

PR 26410
* symbols.c (dollar_label_count, dollar_label_max): Make size_t.
(dollar_label_clear): Don't call memset with NULL pointer.

gas warning fixes

Some versions of gcc with -Werror=format-overflow complain about using
a perfectly good 7 char buffer for "r%dr%d" when the int is between 0
and 64, apparently not seeing the value range.

note: __builtin___sprintf_chk output between 5 and 24 bytes into a destination of size 7

* config/tc-arc.c (declare_register_set): Avoid false positive
format-overflow warning.
* config/tc-epiphany.c (md_assemble): Likewise.
* config/tc-mips.c (md_begin): Likewise.
* config/tc-mmix.c (mmix_md_begin): Likewise.
* config/tc-nds32.c (nds32_elf_append_relax_relocs): Avoid false
positive "may be used uninitialized" warning.

tic54x ld testsuite

* testsuite/ld-libs/libs.exp: Don't run on sh-pe, tic30 or tic54x.
* testsuite/ld-scripts/data.d: xfail tic4x and tic54x.
* testsuite/ld-scripts/empty-address-2a.d: xfail tic54x.
* testsuite/ld-scripts/empty-address-2b.d: Likewise.
* testsuite/ld-scripts/include-1.d: xfail tic4x and tic54x.
* testsuite/ld-scripts/provide-1.d: xfail tic54x.
* testsuite/ld-scripts/provide-2.d: Likewise.
* testsuite/ld-scripts/provide-4.d: Likewise.

gdb/modula-2: parsing of multi-subscript arrays

Fix bug PR m2/26372, GDB's inability to parse multi-dimensional
modula-2 arrays.

We previously had two rules for handling the parsing of array
sub-scripts.  I have reproduced them here with the actual handler
blocks removed to make the bug clearer:

  exp     :    exp '[' non_empty_arglist ']'
          ;

  exp     :    exp '[' exp ']'
          ;

  non_empty_arglist
          :       exp
          ;

  non_empty_arglist
          :       non_empty_arglist ',' exp
          ;

This is ambiguous as the pattern "exp '[' exp" could match either of
the 'exp' rules.  Currently it just so happens that the parser picks
the second 'exp' rule which means we can only handle a single array
index.

As the handler code for the first 'exp' pattern will correctly handle
and number of array indexes then lets just remove the second pattern.

gdb/ChangeLog:

PR m2/26372
        * m2-exp.y (exp): Improve comment for non_empty_arglist case, add
an assert.  Remove single element array indexing pattern as the
MULTI_SUBSCRIPT support will handle this case too.

gdb/testsuite/ChangeLog:

PR m2/26372
        * gdb.modula2/multidim.c: New file.
        * gdb.modula2/multidim.exp: New file.

Revert "Fix for Bug 26372 [Modula-2] Parsing of multi-subscript arrays"

This reverts commit 07758bdfa9e5a762f2ec0deeb51b11d6ad5fe376.

Fix for Bug 26372 [Modula-2] Parsing of multi-subscript arrays

Here is a bugfix for Pr 26372 [Modula-2] Parsing of multi-subscript arrays.
Also included is a dejagnu testcase.  No extra regressions are caused on
Debian GNU/Linux Buster amd64.

gdb/ChangeLog:

2020-08-25  Gaius Mulley  <gaiusmod2@gmail.com>

PR m2/26372
* m2-exp.y: Rewrite array subscript rules to support multidimension
array access.  (ArgumentList) replaces non_empty_arglist.

gdb/testsuite/ChangeLog:

2020-08-25  Gaius Mulley  <gaiusmod2@gmail.com>

PR m2/26372
* testsuite/gdb.modula2/multidim.exp: New file.
* testsuite/gdb.modula2/multidim.c: New file.

gdb: move declaration of valprint_check_validity to valprint.h

The implementation is in valprint.c, so the declaration belongs in
valprint.h.

gdb/ChangeLog:

* value.h (valprint_check_validity): Move declaration from
here...
* valprint.h (valprint_check_validity): ... to here.

Change-Id: Ibe577d3696720099e6d79888d4ee8e3c1bf05a26

Automatic date update in version.in

gdb/testsuite: make runto always emit a FAIL on internal error

I noticed that when a test uses `runto_main` and a GDB internal error
happens while running to main, no error or fail is emitted.  This is
because `runto_main` uses the `no-message` option of `runto`.

As a result, if a test fails to run to main and exits, no sign that
something went wrong is emitted.  For example, add this always-false
assertion to compute_frame_id:

    --- a/gdb/frame.c
    +++ b/gdb/frame.c
    @@ -545,6 +545,7 @@ static void
     compute_frame_id (struct frame_info *fi)
     {
       gdb_assert (!fi->this_id.p);
    +  gdb_assert (false);

       if (frame_debug)
         fprintf_unfiltered (gdb_stdlog, "{ compute_frame_id (fi=%d) ",

... and run gdb.dwarf2/dw2-align.exp.  No fail or sign that something
went wrong is shown.  It just appears as if the test gets skipped.

A developer introducing such a regression in this test today would
likely notice it, because we are used to diff-ing test results.  So we
would see some PASSes dispappear for no good reason and look into it.

But I find it worrysome for two reasons:

1. Scripts that analyze regressions (such as the one on the buildbot)
   may only look for new FAILs or new ERRORs.  It would probably miss
   this.
2. Imagine that we one day have a testsuite that runs cleanly (some
   people might already run subsets of the testsuite and expect it to
   all pass), we would just run the testsuite and check that there are
   no fails.  It would be easy to miss something like this.

In case of internal error, I suggest making `runto` emit a FAIL even if
`no-message` was passed.  This is different from other failure modes
that might be expected (whchi rightfully cause the test to simply be
skipped).  An internal error is always bad, so if it happens it should
noisily fail.

gdb/testsuite/ChangeLog:

* lib/gdb.exp (runto): Always emit fail on internal error.

Change-Id: I6e6faed4868ea821541a23042b2d01c30058b0d3

gdb: add debug_prefixed_vprintf

To help ensure that all debug statements have the same format, introduce
the debug_prefixed_vprintf helper.  Implement linux_nat_debug_printf_1
and infrun_debug_printf_1 with it.

I would eventually like to style the module and function name with some
color, to help them stick out, but I don't really know how to do that
yet, it can always be done later.

gdb/ChangeLog:

* debug.h: New file.
* debug.c (debug_prefixed_vprintf): New function.
* infrun.c (infrun_debug_printf_1): Use debug_prefixed_vprintf.
* linux-nat.c (linux_nat_debug_printf_1): Likewise.

Change-Id: Iccc290a2dc6b5fffcbe1c2866ed8d804ad380764

gdb: add infrun_debug_printf macro

Introduce this macro to print debug statements in the infrun.c file,
same idea as what was done in 9327494e0eeb ("gdb: add
linux_nat_debug_printf macro").

Although in this case, there are places outside infrun.c that print
debug statements if debug_infrun is set.  So the macro has to be
declared in the header file, so that it can be used in these other
files.

Note one special case.  In stop_all_threads, I've used an explicit

    if (debug_infrun)
      infrun_debug_printf_1 ("stop_all_threads", "done");

for the message in the SCOPE_EXIT.  Otherwise, the message appears like
this:

  [infrun] operator(): done

Until we find a better solution for extracting a meaningful function
name for lambda functions, I think it's fine to handle these special
cases manually, they are quite rare.

Some tests need to be updated, because they rely on some infrun debug
statements.

gdb/ChangeLog:

* infrun.h (infrun_debug_printf_1): New function declaration.
(infrun_debug_printf): New macro.
* infrun.c (infrun_debug_printf_1): Use infrun_debug_printf
throughout.
(infrun_debug_printf): New function.
* breakpoint.c (should_be_inserted): Use infrun_debug_printf.
(handle_jit_event): Likewise.

gdb/testsuite/ChangeLog:

* gdb.base/gdb-sigterm.exp (do_test): Update expected regexp.
* gdb.threads/signal-while-stepping-over-bp-other-thread.exp:
Likewise.
* gdb.threads/stepi-random-signal.exp: Likewise.

Change-Id: I66433c8a9caa64c8525ab57c593022b9d1956d5c

elf_hash_table_id access

* elf-m10300.c (elf32_mn10300_hash_table): Test is_elf_hash_table
before accessing elf_hash_table_id.
* elf32-arc.c (elf_arc_hash_table): Likewise.
* elf32-arm.c (elf32_arm_hash_table): Likewise.
* elf32-avr.c (avr_link_hash_table): Likewise.
* elf32-bfin.c (bfinfdpic_hash_table): Likewise.
* elf32-cris.c (elf_cris_hash_table): Likewise.
* elf32-csky.c (csky_elf_hash_table): Likewise.
* elf32-frv.c (frvfdpic_hash_table): Likewise.
* elf32-hppa.c (hppa_link_hash_table): Likewise.
* elf32-lm32.c (lm32_elf_hash_table): Likewise.
* elf32-m32r.c (m32r_elf_hash_table): Likewise.
* elf32-m68hc1x.h (m68hc11_elf_hash_table): Likewise.
* elf32-m68k.c (elf_m68k_hash_table): Likewise.
* elf32-metag.c (metag_link_hash_table): Likewise.
* elf32-microblaze.c (elf32_mb_hash_table): Likewise.
* elf32-nds32.h (nds32_elf_hash_table): Likewise.
* elf32-or1k.c (or1k_elf_hash_table): Likewise.
* elf32-s390.c (elf_s390_hash_table): Likewise.
* elf32-sh.c (sh_elf_hash_table): Likewise.
* elf32-spu.c (spu_hash_table): Likewise.
* elf32-tilepro.c (tilepro_elf_hash_table): Likewise.
* elf32-xtensa.c (elf_xtensa_hash_table): Likewise.
* elf64-alpha.c (alpha_elf_hash_table): Likewise.
* elf64-hppa.c (hppa_link_hash_table): Likewise.
* elf64-ia64-vms.c (elf64_ia64_hash_table): Likewise.
* elf64-s390.c (elf_s390_hash_table): Likewise.
* elfnn-ia64.c (elfNN_ia64_hash_table): Likewise.
* elfnn-riscv.c (riscv_elf_hash_table): Likewise.
* elfxx-mips.c (mips_elf_hash_table): Likewise.
* elfxx-sparc.h (_bfd_sparc_elf_hash_table): Likewise.
* elfxx-tilegx.c (tilegx_elf_hash_table): Likewise.

Fix erroroneous use of '%zu' in elfcore_grok_win32pstatus

As reported in [1], _bfd_error_handler() doesn't support '%zu'.

module_name_size is always 32-bits in the data structure we are
extracting it from, so use an unsigned int to store it instead.

[1] https://sourceware.org/pipermail/gdb-patches/2020-August/171391.html

bfd/ChangeLog:

2020-08-21  Jon Turney  <jon.turney@dronecode.org.uk>

* elf.c (elfcore_grok_win32pstatus): Change name_size to unsigned
int. Use '%u' format with  _bfd_error_handler to render it.

PR26489, ASAN: ppc64_elf_size_stubs elf64-ppc.c:13389

Stub sections are inserted after sec_info is sized, so have higher ids.
Test flags that will exclude stub sections before looking at the
sec_info array.

PR 26489
* elf64-ppc.c (ppc64_elf_size_stubs): Test code_sec->has_toc_reloc
and code_sec->makes_toc_func_call before sec_info[code_sec->id].

PR26492, ASAN: ppc64_elf_before_check_relocs elf64-ppc.c:4337

PR 26492
* elf64-ppc.c (ppc_hash_table): Test is_elf_hash_table before
accessing elf_hash_table_id.

PR26483, ASAN: ppc_elf_link_params elf32-ppc.c:2314

PR 26483
* elf32-ppc.c (ppc_elf_hash_table): Test is_elf_hash_table before
accessing elf_hash_table_id.

bfd: Handle DW_FORM_data16 for .debug_line tables containing MD5

* dwarf2.c (read_attribute_value): Handle DW_FORM_data16.
(read_formatted_entries): Likewise. And skip zero entry.

CSKY: Add new arch CK860.

bfd/
        * bfd-in2.h (bfd_mach_ck860): New.
        * cpu-csky.c (arch_info_struct): Add item for CK860.

gas/
        * config/tc-csky.c (csky_archs): Add item for CK860,
        change ck810 and ck807's arch_flag.
        (csky_cpus): Add item for CK860.
        (md_begin): Enable DSP for CK810 and CK807 by default.
        (md_apply_fix): Fix CKCORE_TLS_IE32 relocation failure.
        * gas/testsuite/gas/csky/cskyv2_all.d: Change 'sync 0'
        to 'sync'.
        * gas/testsuite/gas/csky/cskyv2_all.s: Likewise.
        * gas/testsuite/gas/csky/cskyv2_ck860.d: New.
        * gas/testsuite/gas/csky/cskyv2_ck860.s: New.
        * gas/testsuite/gas/csky/enhance_dsp.d: Change plsli.u16
        to plsli.16.
        * gas/testsuite/gas/csky/enhance_dsp.s: Likewise.

include/
        * opcode/csky.h (CSKYV2_ISA_10E60): New.
        (CSKY_ARCH_860): New.

opcode/
        * csky-dis.c (csky_find_inst_info): Skip CK860's instructions
        in other CPUs to speed up disassembling.
        * csky-opc.h (csky_v2_opcodes): Add CK860's instructions,
        Change plsli.u16 to plsli.16, change sync's operand format.

Change-Id: I80ec1a9c0cc600d668082a9b91ae6d45b33ec0fc

sparc testsuite fallout

tic54x fixes

A number of the tic54x tests were failing, and I thought it worth
investigating since the target makes use of a lot of hash tables, and
we've just changed gas hash tables.  It turns out none of the gas
failures were due to hashing.

* config/tc-tic54x.c (stag_add_field_symbols): Don't free "name"
in case where it isn't copied.
* config/tc-tic54x.h (LOCAL_LABELS_FB): Undef.
* testsuite/gas/tic54x/field.d: Dump section contents and symbols
rather than disassembling.
* testsuite/gas/tic54x/set.d: Adjust for newer disassembly.

PowerPC TPREL_HA/LO optimisation

ppc64 ld optimises sequences like the following
addis 3,13,wot@tprel@ha
lwz 3,wot@tprel@l(3)
to
nop
lwz 3,wot@tprel(13)
when "wot" is located near enough to the thread pointer.
However, the ABI doesn't require that R_PPC64_TPREL16_HA always be on
an addis rt,13,imm instruction, and while ld checked for that on the
high-part instruction it didn't disable the optimisation on the
low-part instruction.  This patch fixes that problem, disabling the
tprel optimisation globally if high-part instructions don't pass
sanity checks.  The optimisation is also enabled for ppc32, where
before ld.bfd had the code in the wrong place and ld.gold had it in a
block only enabled for ppc64.

bfd/
* elf32-ppc.c (ppc_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc_elf_relocate_section): Move TPREL16_HA/LO optimisation later.
Don't sanity check them here.
* elf64-ppc.c (ppc64_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc64_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc64_elf_relocate_section): Don't sanity check TPREL16_HA.
ld/
* testsuite/ld-powerpc/tls32.d: Update for TPREL_HA/LO optimisation.
* testsuite/ld-powerpc/tlsexe32.d: Likewise.
* testsuite/ld-powerpc/tlsldopt32.d: Likewise.
* testsuite/ld-powerpc/tlsmark32.d: Likewise.
* testsuite/ld-powerpc/tlsopt4_32.d: Likewise.
* testsuite/ld-powerpc/tprel.s,
* testsuite/ld-powerpc/tprel.d,
* testsuite/ld-powerpc/tprel32.d: New tests.
* testsuite/ld-powerpc/tprelbad.s,
* testsuite/ld-powerpc/tprelbad.d: New test.
* testsuite/ld-powerpc/powerpc.exp: Run them.
gold/
* powerpc.cc (Target_powerpc): Add tprel_opt_ and accessors.
(Target_powerpc::Scan::local): Sanity check tprel high relocs.
(Target_powerpc::Scan::global): Likewise.
(Target_powerpc::Relocate::relocate): Control tprel optimisation
with tprel_opt_ and enable for 32-bit.

Remove "memory exhausted" messages

Since we use xcalloc to set up hash table memory, htab_create won't
ever return a failure.

* config/tc-aarch64.c (md_begin): Don't bother checking for
out of memory failure from str_htab_create.
* config/tc-arc.c (arc_insert_opcode, md_begin): Likewise.
(arc_extcorereg, arc_stralloc): Likewise.
* config/tc-arm.c (md_begin): Likewise.
* config/tc-cr16.c (initialise_reg_hash_table, md_begin): Likewise.
* config/tc-cris.c (md_begin): Likewise.
* config/tc-crx.c (md_begin): Likewise.
* config/tc-pdp11.c (md_begin): Likewise.
* config/tc-score.c (s3_build_reg_hsh, s3_begin): Likewise.
* config/tc-score7.c (s7_build_reg_hsh, s7_begin): Likewise.

gcc-4 -Og false positive "may be used uninitialised"

binutils/
* readelf.c (dump_section_as_strings) Avoid false positive
"may be used uninitialised".
gas/
* config/tc-arm.c (move_or_literal_pool): Avoid false positive
"may be used uninitialised".
(opcode_lookup): Likewise.

PR26526, 5014c2d22b2 breaks compiling the Linux kernel for ARM

PR 26526
* symbols.c (local_symbol_convert): Clear out xtra.

CSKY: Add ck803r2 series cpu.

gas/
        * config/tc-csky.c (CSKY_ISA_803R2): New.
        (csky_archs): Add ck803r2 series.
        (md_begin): Fix warning about -medsp.
        (csky_get_freg_val): Support lowercase of fpu register name.
        * testsuite/gas/csky/cskyv2_ck803r2.s: New file.
        * testsuite/gas/csky/cskyv2_ck803r2.d: New file.

include/
        * csky.h (CSKYV2_ISA_3E3R2): New.

opcodes/
        * csky-opc.h (csky_v2_opcodes): Add instruction bnezad.

Automatic date update in version.in

Disable default ELF plugins on 32-bit hppa*-*-hpux*.

PR binutils/26357
* configure.ac: Disable plugins by default on 32-bit hppa*-*-hpux*.
* configure: Regenerate.

PR26513, 629310abec breaks assembling PowerPC Linux kernels

Inserting with replacement is wrong for some gas hash table uses.
This patch implements an htab_insert that conditionally replaces, and
similarly for str_hash_insert.  str_hash_insert with replace=0 is
roughly equivalent to the older hash_insert, and str_hash_insert with
replace=1 to the older hash_jam, but return values are different.  I
found it useful to know whether the slot was occupied prior to
inserting/replacing.  I've also reinstated the fatal errors on messing
up opcode tables with duplicates.

PR 26513
* hash.h (htab_insert): Update prototype and comment.
(struct string_tuple): Make "value" a const void*.
(string_tuple_alloc): Likewise.
(str_hash_find, str_hash_find_n): Cast returned value.
(str_hash_insert): Add "replace" parameter, and return slot pointer.
Free alloc'd element when not inserted.
* hash.c (htab_insert): Likewise.  Return slot when element exists,
otherwise return NULL.
* read.c (pop_insert): Insert into hash table without first searching.
* config/tc-avr.c (md_begin): Likewise.
* config/tc-msp430.c (md_begin): Likewise.
* config/tc-nds32.c (nds32_init_nds32_pseudo_opcodes): Likewise.
* config/tc-v850.c (md_begin): Likewise.
* macro.c (do_formals, define_macro, macro_expand_body): Likewise.
(delete_macro): Delete from hash table.
* config/tc-tic54x.c (subsym_create_or_replace): Correct logic.

* symbols.c (local_symbol_make, symbol_table_insert): Allow
replacement of hash table entries.
* config/obj-coff-seh.c (seh_hash_insert): Likewise.
* config/obj-coff.c (tag_insert): Likewise.
* config/tc-iq2000.c (iq2000_add_macro): Likewise.
* config/tc-m68k.c (md_begin): Likewise for aliases.
* config/tc-tic4x.c (tic4x_asg): Likewise.
* config/tc-tic6x.c (md_begin): Likewise.

* dw2gencfi.c (dwcfi_hash_find_or_make): Disallow replacement of
hash table entries.
* ecoff.c (add_string, get_tag): Likewise.
* macro.c (expand_irp): Likewise.
* config/obj-elf.c (build_additional_section_info): Likewise.
* config/tc-aarch64.c (insert_reg_alias): Likewise.
(checked_hash_insert): Likewise.
* config/tc-alpha.c (get_alpha_reloc_tag, md_begin): Likewise.
* config/tc-arc.c (arc_insert_opcode, declare_register): Likewise.
(declare_addrtype, md_begin, arc_extcorereg): Likewise.
* config/tc-arm.c (insert_reg_alias): Likewise.
(arm_tc_equal_in_insn, md_begin): Likewise.
* config/tc-cr16.c (initialise_reg_hash_table, md_begin): Likewise.
* config/tc-cris.c (md_begin): Likewise.
* config/tc-crx.c (md_begin): Likewise.
* config/tc-csky.c (md_begin): Likewise.
* config/tc-d10v.c (md_begin): Likewise.
* config/tc-dlx.c (md_begin): Likewise.
* config/tc-ft32.c (md_begin): Likewise.
* config/tc-h8300.c (md_begin): Likewise.
* config/tc-hppa.c (md_begin): Likewise.
* config/tc-i386.c (md_begin): Likewise.
* config/tc-ia64.c (dot_rot, dot_entry, declare_register): Likewise.
(md_begin, dot_alias): Likewise.
* config/tc-m68hc11.c (md_begin): Likewise.
* config/tc-m68k.c (md_begin): Likewise.
* config/tc-mcore.c (md_begin): Likewise.
* config/tc-microblaze.c (md_begin): Likewise.
* config/tc-mips.c (md_begin): Likewise.
* config/tc-mmix.c (md_begin): Likewise.
* config/tc-mn10200.c (md_begin): Likewise.
* config/tc-mn10300.c (md_begin): Likewise.
* config/tc-moxie.c (md_begin): Likewise.
* config/tc-nds32.c (nds32_relax_hint, md_begin): Likewise.
* config/tc-nios2.c (md_begin): Likewise.
* config/tc-ns32k.c (md_begin): Likewise.
* config/tc-pdp11.c (md_begin): Likewise.
* config/tc-pj.c (fake_opcode, md_begin): Likewise.
* config/tc-ppc.c (ppc_setup_opcodes): Likewise.
* config/tc-pru.c (md_begin): Likewise.
* config/tc-riscv.c (init_ext_version_hash): Likewise.
(init_opcode_names_hash, hash_reg_name, init_opcode_hash): Likewise.
(riscv_init_csr_hash): Likewise.
* config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
* config/tc-score.c (s3_insert_reg): Likewise.
(s3_build_score_ops_hsh, s3_build_dependency_insn_hsh): Likewise.
* config/tc-score7.c (s7_build_score_ops_hsh): Likewise.
(s7_build_dependency_insn_hsh, s7_insert_reg): Likewise.
* config/tc-sh.c (md_begin): Likewise.
* config/tc-sparc.c (md_begin): Likewise.
* config/tc-spu.c (md_begin): Likewise.
* config/tc-tic30.c (md_begin): Likewise.
* config/tc-tic4x.c (tic4x_inst_insert): Likewise.
* config/tc-tic54x.c (stag_add_field_symbols, md_begin): Likewise.
(tic54x_endstruct, tic54x_var, tic54x_macro_info): Likewise.
(subsym_substitute): Likewise.
* config/tc-tilegx.c (md_begin): Likewise.
* config/tc-tilepro.c (md_begin): Likewise.
* config/tc-vax.c (vip_begin): Likewise.
* config/tc-wasm32.c (md_begin): Likewise.
* config/tc-xgate.c (md_begin): Likewise.
* config/tc-z8k.c (md_begin): Likewise.
* testsuite/gas/ppc/dcbt.d,
* testsuite/gas/ppc/dcbt.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.

* ecoff.c (add_string): Report fatal error on duplicates.
* config/tc-alpha.c (md_begin): Likewise.
* config/tc-arc.c (arc_insert_opcode, declare_register): Likewise.
(declare_addrtype, md_begin, arc_extcorereg): Likewise.
* config/tc-cr16.c (initialise_reg_hash_table, md_begin): Likewise.
* config/tc-cris.c (md_begin): Likewise.
* config/tc-crx.c (md_begin): Likewise.
* config/tc-dlx.c (md_begin): Likewise.
* config/tc-hppa.c (md_begin): Likewise.
* config/tc-i386.c (md_begin): Likewise.
* config/tc-ia64.c (dot_rot, dot_entry, declare_register): Likewise.
(md_begin): Likewise.
* config/tc-m68k.c (md_begin): Likewise.
* config/tc-mips.c (md_begin): Likewise.
* config/tc-nios2.c (md_begin): Likewise.
* config/tc-ns32k.c (md_begin): Likewise.
* config/tc-ppc.c (ppc_setup_opcodes): Likewise.
* config/tc-pru.c (md_begin): Likewise.
* config/tc-riscv.c (init_ext_version_hash): Likewise.
(init_opcode_names_hash, hash_reg_name, init_opcode_hash): Likewise.
* config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
* config/tc-sparc.c (md_begin): Likewise.
* config/tc-tic30.c (md_begin): Likewise.
* config/tc-tic4x.c (tic4x_inst_insert): Likewise.
* config/tc-tilegx.c (md_begin): Likewise.
* config/tc-tilepro.c (md_begin): Likewise.
* config/tc-vax.c (vip_begin): Likewise.

* config/tc-alpha.c,
* config/tc-arm.c,
* config/tc-avr.c,
* config/tc-cr16.c,
* config/tc-csky.c,
* config/tc-i386.c,
* config/tc-m68hc11.c,
* config/tc-m68k.c,
* config/tc-microblaze.c,
* config/tc-ns32k.c,
* config/tc-pj.c,
* config/tc-ppc.c,
* config/tc-score.c,
* config/tc-score7.c,
* config/tc-tic4x.c,
* config/tc-tic54x.c,
* config/tc-tilegx.c,
* config/tc-tilepro.c,
* config/tc-xgate.c: Formatting.

ada-lex.l: Ignore register diagnostic also for g++ defaulting to ISO C++17

Building with a really old flex and a really new g++ is probably not
recommended, but it should not cause compile errors.

gdb/ChangeLog:

* ada-lex.l: Extend register warnings diagnostics comment for g++.

include/ChangeLog:

* diagnostics.h (DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER): Also define
for GCC version 7.0 or higher.

Automatic date update in version.in

elf: Keep only one '@' for undefined versioned symbols

The symbol string table in the .symtab section is optional and cosmetic.
Keep only one '@' for undefined versioned symbols, which are defined in
shared objects, in the symbol string table.  Update "nm -D" to display
only one '@' for undefined versioned symbols.

bfd/

PR ld/26382
* elflink.c (elf_link_output_symstrtab): Keep only one '@' for
versioned symbols, which are defined in shared objects, in
symbol string table.

binutils/

PR ld/26382
* nm.c (print_symname): Display only one '@' for undefined
versioned symbols.
* doc/binutils.texi: Update nm version information.

ld/

PR ld/26382
* testsuite/ld-elf/pr26302.nd: Updated.
* testsuite/ld-elf/pr26302.rd: New file.
* testsuite/ld-elf/shared.exp: Add a test for readelf -sW.

gdb: assert that we don't try to get a frame's id while it is computed

I'm dealing these days with a class of bugs that involve trying to get a
certain frame's id while we are in the process of computing it.  In other
words, compute_frame_id being called for a frame, eventually calling
get_frame_id for that same frame.  I don't think this is ever supposed to
happen, as that creates a cyclic dependency.

Usually, these problems cause some failure down the line.  I'm proposing with
this patch to catch them as early as possible, as soon as the situation
described above happens.  I think that helps because the failed assertion will
be closer to the root of the problem.

To do so, the patch changes the frame_info::this_id::p flag from a boolean (is
the frame id computed or not) to a tri-state:

- the frame id is not computed
- the frame id is being computed
- the frame id is computed

Then, we can properly assert that get_frame_id doesn't get called for a frame
whose id is being computed.

To illustrate how that can help, let's imagine we apply the following change to
frame_unwind_got_optimized:

    --- a/gdb/frame-unwind.c
    +++ b/gdb/frame-unwind.c
    @@ -260,8 +260,7 @@ frame_unwind_got_optimized (struct frame_info *frame, int regnum)
       mark_value_bytes_optimized_out (val, 0, TYPE_LENGTH (type));
       VALUE_LVAL (val) = lval_register;
       VALUE_REGNUM (val) = regnum;
    -  VALUE_NEXT_FRAME_ID (val)
    -    = get_frame_id (get_next_frame_sentinel_okay (frame));
    +  VALUE_NEXT_FRAME_ID (val) = get_frame_id (frame);
       return val;
     }

... and run the following command, which leads to a failed assertion (you need
to run the corresponding test to generate the binary first):

    $ ./gdb -q -nx testsuite/outputs/gdb.dwarf2/dw2-undefined-ret-addr/dw2-undefined-ret-addr -ex "b stop_frame" -ex r

Without this patch applied, we catch the issue indirectly, when the top-level
get_frame_id tries to stash the frame:

    /home/smarchi/src/binutils-gdb/gdb/frame.c:593: internal-error: frame_id get_frame_id(frame_info*): Assertion `stashed' failed.

    ...
    #9  0x0000000001af1c3a in internal_error (file=0x1cea060 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=593, fmt=0x1ce9f80 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55
    #10 0x0000000000e9b413 in get_frame_id (fi=0x6210005105e0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:593
    #11 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7fff1d8b9760) at /home/smarchi/src/binutils-gdb/gdb/frame.c:308
    #12 0x000000000149a261 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x6210005105e0, num=-1, stream=0x60300008a580) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750
    #13 0x000000000149d938 in print_frame (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394
    #14 0x000000000149c0c8 in print_frame_info (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119
    #15 0x0000000001498100 in print_stack_frame (frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366
    #16 0x00000000010234b7 in print_stop_location (ws=0x7fff1d8ba1f0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366
    #17 0x000000000102362d in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382
    ...

It freaks out because the frame is already in the stash: it was added by an
inner call to get_frame_id, called indirectly by compute_frame_id.  Debugging
this failure is difficult because we have to backtrack to where this happened.

With the patch applied, we catch the issue earlier, here:

    /home/smarchi/src/binutils-gdb/gdb/frame.c:601: internal-error: frame_id get_frame_id(frame_info*): Assertion `fi->this_id.p != frame_id_status::COMPUTING' failed

    ...
    #9  0x0000000001af22bc in internal_error (file=0x1cea6e0 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=601, fmt=0x1cea600 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55
    #10 0x0000000000e9b7e3 in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:601
    #11 0x0000000000e989b3 in frame_unwind_got_optimized (frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame-unwind.c:264
    #12 0x0000000000cbe386 in dwarf2_frame_prev_register (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1267
    #13 0x0000000000e9f569 in frame_unwind_register_value (next_frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame.c:1266
    #14 0x0000000000e9eaab in frame_register_unwind (next_frame=0x62100050dde0, regnum=16, optimizedp=0x7ffca814ade0, unavailablep=0x7ffca814adf0, lvalp=0x7ffca814ae10, addrp=0x7ffca814ae20, realnump=0x7ffca814ae00, bufferp=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1169
    #15 0x0000000000e9f233 in frame_unwind_register (next_frame=0x62100050dde0, regnum=16, buf=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1225
    #16 0x0000000000f84262 in i386_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/i386-tdep.c:1969
    #17 0x0000000000ec95dd in gdbarch_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/gdbarch.c:3062
    #18 0x0000000000cb5e9d in dwarf2_tailcall_sniffer_first (this_frame=0x62100050dde0, tailcall_cachep=0x62100050dee0, entry_cfa_sp_offsetp=0x7ffca814b160) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame-tailcall.c:387
    #19 0x0000000000cbdd38 in dwarf2_frame_cache (this_frame=0x62100050dde0, this_cache=0x62100050ddf8) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1198
    #20 0x0000000000cbe026 in dwarf2_frame_this_id (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, this_id=0x62100050de40) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1226
    #21 0x0000000000e9b447 in compute_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:580
    #22 0x0000000000e9b89e in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:613
    #23 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7ffca814b610) at /home/smarchi/src/binutils-gdb/gdb/frame.c:315
    #24 0x000000000149a8e3 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x62100050dde0, num=-1, stream=0x60300008a520) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750
    #25 0x000000000149dfba in print_frame (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394
    #26 0x000000000149c74a in print_frame_info (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119
    #27 0x0000000001498782 in print_stack_frame (frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366
    #28 0x0000000001023b39 in print_stop_location (ws=0x7ffca814c0a0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366
    #29 0x0000000001023caf in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382
    ...

Now, we can clearly see that get_frame_id for frame `fi=0x62100050dde0` gets
called while compute_frame_id is active for that frame.  The backtrace is more
helpful to identify the root of the problem.

gdb/ChangeLog:

* frame.c (enum class frame_id_status): New.
(struct frame_info) <this_id::p>: Change type to frame_id_status.
(fprintf_frame): Update.
(compute_frame_id): Set frame id status to "computing" on entry.
Set it back to "not_computed" on failure and to "computed" on
success.
(get_frame_id): Assert the frame id is not being computed.
(create_sentinel_frame): Use frame_id_status::COMPUTED.
(create_new_frame): Likewise.
(frame_cleanup_after_sniffer): Update assert.

Change-Id: I5f1a25fafe045f756bd75f358892720b30ed20c9

Automatic date update in version.in

sim/bfin: include config/pkg.m4 in configure.ac

When trying to re-generate configure in sim/bfin, I get:

    $ autoreconf -vf
    autoreconf: Entering directory `.'
    autoreconf: configure.ac: not using Gettext
    autoreconf: running: aclocal --force
    autoreconf: configure.ac: tracing
    autoreconf: configure.ac: not running libtoolize: --install not given
    autoreconf: running: /opt/autostuff/bin/autoconf --force
    configure.ac:57: error: possibly undefined macro: AC_CHECK_LIB
          If this token and others are legitimate, please use m4_pattern_allow.
          See the Autoconf documentation.
    autoreconf: /opt/autostuff/bin/autoconf failed with exit status: 1

This happens since commit f693213d126a ("Run `autoreconf -vf` throughout").

The problem (not clear from the error message) is that the
PKG_CHECK_MODULES macro used in configure.ac is undefined.  In the past, I
suppose that it relied on the person running autoconf having pkg.m4 (from
pkg-config) in their include path.  That's not my case.

Since we recently added a local version of PKG_CHECK_MODULES to our tree,
we can just make sim/bfin/configure.ac use it.  This patch makes
configure.ac include config/pkg.m4, and re-generates configure.  With this,
the configure script appears to be generated correctly, I am able to
configure and build the bfin simulator.

Note: using sinclude to include the required m4 files makes no sense to
me.  These files contain macros we need, if they are not defined then
the resulting file is unusable.  And sinclude fails silently if the file
is not found.  So, better use include/m4_include.

sim/bfin/ChangeLog:

* configure.ac: Include config/pkg.m4.

Change-Id: I7d8012e5ed510cd7746b94e918f0feb1c701cd83

Fix problems with the AArch64 linker exposed by testing it with sanitization enabled.

bfd * elfnn-aarch64.c (_bfd_aarch64_erratum_835769_scan): Only sort
the data map if there are entries in it.
(_bfd_aarch64_erratum_843419_scan): Likewise.

opcodes * aarch64-dis.c (get_sym_code_type): Return FALSE for non-ELF
symbols.

Recognize DW_LANG_C11 in readelf testsuite.

readelf_wi_test checks the DW_AT_LANGUAGE is recognized by matching
against ANSI C. But for the new DWARF5 DW_LANG_C11 readelf simply
prints "C11", not prefixed with ANSI (DW_LANG_C is "non-ANSI C",
DW_LANG_C89 is "ANSI C" and DW_LANG_C99 is "ANSI-C99"). Adjust the
testcase instead of readelf because C11 seems a fine name.

binutils/ChangeLog:

* testsuite/binutils-all/readelf.exp (readelf_wi_test): Also
recognize DW_LANG_C11.

Redo gas local symbol support

gas handles local symbols specially in order to save memory, but the
implementation using two separate hash tables is inefficient,
particularly the scheme of duplicating a struct local_symbol when it
needs to be converted to a full struct symbol.  Also, updating symbol
pointers with LOCAL_SYMBOL_CHECK is horrible and has led to some hard
to find bugs.

This changes the implementation to use a single hash table and avoids
another copy of the symbol name in symbol_entry_t.  When converting
local symbols the struct local_symbol memory is reused.  Not only
does that save memory, but there is no need to twiddle symbol pointers
with LOCAL_SYMBOL_CHECK.

Assembling gcc-10 -g -Og gold/powerpc.cc output shows the following:

old:
symbol table hash statistics:
1371192 searches
1290398 collisions
143585 elements
262139 table size
mini local symbol table hash statistics:
2966204 searches
2707489 collisions
523533 elements
1048573 table size
523533 mini local symbols created, 140453 converted

new:
symbol table hash statistics:
2828883 searches
2453138 collisions
526665 elements
1048573 table size
523533 mini local symbols created, 140453 converted

* symbols.c (struct local_symbol): Add "hash" entry.  Reorder fields.
Delete union.  Adjust code throughout file.
(struct symbol): Add "hash", "name" and "x" entries.  Reorder fields.
Split off some to..
(struct xsymbol): ..this.  New struct.  Adjust code throughout file
accessing these fields.
(struct symbol_entry): Delete.
(union symbol_entry): New.
(hash_symbol_entry): Adjust for symbol_entry_t change.
(symbol_entry_find): Likewise.
(eq_symbol_entry): Compare hash values too.
(symbol_entry_alloc): Delete.
(local_symbol_converted_p, local_symbol_mark_converted): Delete.
(local_symbol_get_real_symbol, local_symbol_set_real_symbol): Delete.
(local_hash): Delete.
(abs_symbol_x, dot_symbol_x): New static var.
(symbol_init): New function.
(symbol_create): Rewrite.
(LOCAL_SYMBOL_CHECK): Delete.  Replace uses throughout with simple
test of flags.local_symbol.
(local_symbol_make): Adjust for struct local_symbol changes.
(local_symbol_convert): Rewrite.  Adjust all callers.
(symbol_table_insert): Simplify.
(symbol_clone): Comment on local sym cloning.  Handle split symbol
struct.
(get_real_sym): Delete.  Remove all uses.
(symbol_find_exact_noref): Simplify.
(resolve_local_symbol): Don't resolve non-locals.
(S_SET_SEGMENT): Don't special case reg_section.
(S_SET_NAME): Set both name and bsym->name.
(symbol_mark_resolved, symbol_resolved_p): Simplify.
(symbol_symbolS): Update comment.
(symbol_begin): Don't create local_hash.  Adjust abs_symbol setup.
(dot_symbol_init): Adjust dot_symbol setup.
(symbol_print_statistics): Delete local_hash stats.

gas symbol struct field renaming

Get rid of sy_ prefix, and some unused fields.

* symbols.c (struct symbol_flags): Rename sy_volatile to volatil,
and remove sy_ from other field names.  Update throughout.
(struct symbol): Remove sy_ from field names.  Delete unused
TARGET_SYMBOL_FIELDS.  Update throughout file.  Move after..
(struct local_symbol): ..here.  Remove lsy_ from field names.
Delete unused TC_LOCAL_SYMFIELD_TYPE.  Update throughout file.
(local_symbol_resolved_p, local_symbol_mark_resolved): Delete.
Expand uses throughout file.
(local_symbol_get_frag, local_symbol_set_frag): Likewise.
(symbol_new): Move symbol_table_frozen test to..
(symbol_append): ..here, and..
(symbol_insert): ..here.
(resolve_symbol_value, symbol_relc_make_expr): White space fixes.
(HANDLE_XADD_OPT1, HANDLE_XADD_OPT2): Likewise.
* config/obj-coff.h (RESOLVE_SYMBOL_REDEFINITION): Update.

Rearrange symbol_create parameters

These functions take an offset within frag, frag within section, and
section parameter.  So it makes sense to order the parameters as
section, frag, offset.

* symbols.h (symbol_new, symbol_create, local_symbol_make),
(symbol_temp_new): Arrange params as section, frag, offset.
* symbols.c: Adjust to suit.
* as.c: Likewise.
* cgen.c: Likewise.
* dwarf2dbg.c: Likewise.
* ecoff.c: Likewise.
* expr.c: Likewise.
* itbl-ops.c: Likewise.
* read.c: Likewise.
* stabs.c: Likewise.
* subsegs.c: Likewise.
* config/obj-coff.c: Likewise.
* config/obj-elf.c: Likewise.
* config/obj-macho.c: Likewise.
* config/tc-aarch64.c: Likewise.
* config/tc-alpha.c: Likewise.
* config/tc-arc.c: Likewise.
* config/tc-arm.c: Likewise.
* config/tc-avr.c: Likewise.
* config/tc-cr16.c: Likewise.
* config/tc-cris.c: Likewise.
* config/tc-csky.c: Likewise.
* config/tc-dlx.c: Likewise.
* config/tc-hppa.c: Likewise.
* config/tc-i386.c: Likewise.
* config/tc-ia64.c: Likewise.
* config/tc-m32r.c: Likewise.
* config/tc-m68k.c: Likewise.
* config/tc-mips.c: Likewise.
* config/tc-mmix.c: Likewise.
* config/tc-mn10200.c: Likewise.
* config/tc-mn10300.c: Likewise.
* config/tc-nds32.c: Likewise.
* config/tc-nios2.c: Likewise.
* config/tc-ppc.c: Likewise.
* config/tc-riscv.c: Likewise.
* config/tc-s390.c: Likewise.
* config/tc-sh.c: Likewise.
* config/tc-tic4x.c: Likewise.
* config/tc-tic54x.c: Likewise.
* config/tc-xtensa.c: Likewise.

CSKY: Support two operands form for bloop.

gas/
        * config/tc-csky.c (csky_insn_info): Add member last_isize.
        (md_assemble): Assign value to csky_insn.last_isize.
        * testsuite/gas/csky/enhance_dsp.d: Test bloop's two operands form.
        * testsuite/gas/csky/enhance_dsp.s: Likewise.

opcodes/
        * csky-opc.h (csky_v2_opcodes): Add two operands form for bloop.

fix objcopy of PE images with .buildid section

Xen Project embeds a build ID in its hypervisor binary (including its
EFI variant), living in a standalone section. This usually gets placed
right after .rodata, and due to the rounding done on the (file) size of
.rodata the two sections appear to overlap (as far as e.g.
find_section_by_vma() is concerned). With the first byte "found" in
.rodata, nothing guarantees that the entire debug dir fits in that
section, leading to apparently random failure of objcopy on such an
image.

Possible alternatives to the solution chosen:
- make find_section_by_vma() honor virt_size,
- correct the recording of sizes elsewhere (ibfd has size == virt_size,
  while obfd doesn't),
- fix the linker to avoid producing apparently overlapping sections.

While touching the condition around and the contents of the disgnostic,
pull it up ahead of the bfd_malloc_and_get_section() call: There's no
point first obtaining the section contents, in order to then fail.

Automatic date update in version.in

gdb: handle the `ptid.is_pid ()` case in registers_changed_ptid

As reported by Tom here [1], commit 888bdb2b7445 ("gdb: change regcache
list to be a map") overlooked an important case, causing a regression.
When registers_changed_ptid is called with a pid-like ptid, it used to
clear all the regcaches for that pid.  That commit accidentally removed
that behavior.  We need to handle the `ptid.is_pid ()` case in
registers_changed_ptid.

The most trivial way of fixing it would be to iterate on all ptids of a
target and delete the entries where the ptid match the pid.  But the
point of that commit was to avoid having to iterate on ptids to
invalidate regcaches, so that would feel like a step backwards.

The only logical solution I see is to add yet another map level, so that
we now have:

  target -> (pid -> (ptid -> regcaches))

This patch implements that and adds a test for the case of calling
registers_changed_ptid with a pid-like ptid.

[1] https://sourceware.org/pipermail/gdb-patches/2020-August/171222.html

gdb/ChangeLog:

* regcache.c (pid_ptid_regcache_map): New type.
(target_ptid_regcache_map): Remove.
(target_pid_ptid_regcache_map): New type.
(regcaches): Change type to target_pid_ptid_regcache_map.
(get_thread_arch_aspace_regcache): Update.
(regcache_thread_ptid_changed): Update, handle pid-like ptid
case.
(regcaches_size): Update.
(regcache_count): Update.
(registers_changed_ptid_target_pid_test): New.
(_initialize_regcache): Register new test.

Change-Id: I4c46e26d8225c177dbac9488b549eff4c68fa0d8

gdb: split regcaches management selftest

The selftest `regcaches` selftest is a bit too broad for my taste,
testing the behavior of get_thread_arch_aspace_regcache and various
cases of registers_changed_ptid.  Since I'll want to test even more
scenarios of registers_changed_ptid, passing different sets of
parameters, it will be difficult to do in a single test case.  It is
difficult to change something at some point in the test case while make
sure it doesn't compromise what comes after, that we still test the
scenarios that we intended to test.  So, split the test case in multiple
smaller ones.

- Split the test case in multiple, where each test case starts from
  scratch and tests one specific scenario.

- Introduce the populate_regcaches_for_test function, which is used by
  the various test cases to start with a regcache container populated
  with a few regcaches for two different targets.

- populate_regcaches_for_test returns a regcache_test_data object, which
  contains the test targets that were used to create the regcaches.  It
  also takes care to call registers_changed at the beginning and end of
  the test to ensure the test isn't influenced by existing regcaches,
  and cleans up after itself.

- Move the regcache_count lambda function out of
  regcache_thread_ptid_changed, so it can be used in
  other tests.

- For get_thread_arch_aspace_regcache, test that getting a regcache that
  already exists does not increase the count of existing regcaches.

- For registers_changed_ptid, test the three cases we handle today:
  (nullptr, minus_one_ptid), (target, minus_one_ptid) and (target,
  ptid).  The (target, minus_one_ptid) case was not tested prior to this
  patch.

gdb/ChangeLog:

* regcache.c (regcache_count): New.
(struct regcache_test_data): New.
(regcache_test_data_up): New.
(populate_regcaches_for_test): New.
(regcaches_test): Remove.
(get_thread_arch_aspace_regcache_test): New.
(registers_changed_ptid_all_test): New.
(registers_changed_ptid_target_test): New.
(registers_changed_ptid_target_ptid_test): New.
(regcache_thread_ptid_changed): Remove regcache_count lambda.
(_initialize_regcache): Register new tests.

Change-Id: Id4280879fb40ff3aeae49b01b95359e1359c3d4b

gdb: refactor test_get_thread_arch_aspace_regcache

Do these misc changes to test_get_thread_arch_aspace_regcache:

- Rename to get_thread_arch_aspace_regcache_and_check.  The following
  patch introduces a selftest for get_thread_arch_aspace_regcache, named
  get_thread_arch_aspace_regcache_test.  To avoid confusion between the
  two functions, rename this one to
  get_thread_arch_aspace_regcache_and_check, I think it describes better
  what it does.

- Remove gdbarch parameter.  We always pass the same gdbarch (the
  current inferior's gdbarch), so having a parameter is not useful.  It
  would be interesting to actually test with multiple gdbarches, to
  verify that the regcache container can hold multiple regcaches (with
  different architectures) for a same (target, ptid).  But it's not the
  case as of this patch.

- Verify that the regcache's arch is correctly set.

- Remove the aspace parameter.  We always pass NULL here, so it's not
  useful to have it as a parameter.  Also, instead of passing a NULL
  aspace to get_thread_arch_aspace_regcache and verifying that we get a
  NULL aspace back, pass the current inferior's aspace (just like we use
  the current inferior's gdbarch).

gdb/ChangeLog:

* regcache.c (test_get_thread_arch_aspace_regcache): Rename to...
(get_thread_arch_aspace_regcache_and_check): ... this.  Remove
gdbarch and aspace parameter.  Use current inferior's aspace.
Validate regcache's arch value.
(regcaches_test): Update.

Change-Id: I8b4c2303b4f91f062269043d1f7abe1650232010

gdb: clear regcaches at the start of regcaches selftest

It currently does not work to run the `regcaches` selftest while
debugging something.  This is because we expect that there exists no
regcache at the start of the test.  If we are debugging something, there
might exist some regcaches.

Fix it by making the test clear regcaches at the start.

While at it, make the test clean up after it self and clear the
regcaches at the end too.

gdb/ChangeLog:

* regcache.c (regcaches_test): Call registers_changed.

Change-Id: I9d4f83ecb0ff9721a71e2c5cbd19e6e6d4e6c30c

Ensure that compressed sections that have an ELF compression header structure at the start are correctly aligned.

PR 26428
bfd * bfd.c (bfd_update_compression_header): Also set the sh_addralign
field in the ELF header of the compressed sections.

ld * testsuite/ld-elf/zlibbegin.rS: Update expected output.
* testsuite/ld-elf/zlibnormal.rS: Likewise.

gdb: fix typo "breapoint" -> "breakpoint"

gdb/ChangeLog:
2020-08-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* infrun.c (process_event_stop_test): Fix typo "breapoint".

gdb/testsuite/ChangeLog:
2020-08-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

* gdb.base/print-file-var.exp: Fix typo "breapoint".
* gdb.trace/strace.exp: Ditto.

Apply a workaround to mitigate a quadratic performance hit in the linker when writing out secondary reloc sections.

PR 26406
* elf-bfd.h (struct bfd_elf_section_data): Add
has_secondary_relocs field.
* elf.c (_bfd_elf_copy_special_section_fields): Set the
has_secondary_relocs field for sections which have associated
secondary relocs.
* elfcode.h (elf_write_relocs): Only call write_secondary_relocs
on sections which have associated secondary relocs.

Fix for incorrect breakpoint set in case of flang compiled binary

  Currently, GDB is not able to set a breakpoint at subprogram post
prologue for flang generated binaries. This is due to clang having
two line notes one before and another after the prologue.
  Now the end of prologue is determined using symbol table, which was
the way for clang generated binaries already. Since clang and flang
both share same back-end it is true for flang as well.

gdb/ChangeLog

      * amd64-tdep.c (amd64_skip_prologue): Using symbol table
      to find the end of prologue for flang compiled binaries.
      * arm-tdep.c (arm_skip_prologue): Likewise.
      * i386-tdep.c (i386_skip_prologue): Likewise.
      * producer.c (producer_is_llvm): New function.
      (producer_parsing_tests): Added new tests for clang/flang.
      * producer.h (producer_is_llvm): New declaration.

gdb/testsuite/ChangeLog

      * gdb.fortran/vla-type.exp: Skip commands not required for
      the Flang compiled binaries after prologue fix.

Remove --reduce-memory-overheads and --hash-size arguments.

* NEWS: Mention --reduce-memory-overheads and --hash-size arguments
options.
* as.c: Remove the options from help.
* doc/as.texi: Remove options.
* doc/internals.texi: Remove hash from documentation.
* hash.c (struct hash_entry): Remove.
(struct hash_control): Likewise.
(set_gas_hash_table_size): Likewise.
(hash_new_sized): Likewise.
(hash_new): Likewise.
(hash_die): Likewise.
(hash_lookup): Likewise.
(hash_insert): Likewise.
(hash_jam): Likewise.
(hash_replace): Likewise.
(hash_find): Likewise.
(hash_find_n): Likewise.
(hash_delete): Likewise.
(hash_traverse): Likewise.
(hash_print_statistics): Likewise.
(TABLES): Likewise.
(STATBUFSIZE): Likewise.
(main): Likewise.
(what): Likewise.
(destroy): Likewise.
(applicatee): Likewise.
(whattable): Likewise.
* hash.h (struct hash_control): Likewise.
(set_gas_hash_table_size): Likewise.
(hash_new): Likewise.
(hash_new_sized): Likewise.
(hash_die): Likewise.
(hash_insert): Likewise.
(hash_jam): Likewise.
(hash_replace): Likewise.
(hash_find): Likewise.
(hash_find_n): Likewise.
(hash_delete): Likewise.
(hash_traverse): Likewise.
(hash_print_statistics): Likewise.

Port gas/config/* to str_htab.

* config/obj-coff-seh.c (seh_hash_insert): Port to use new
str_htab type.
(seh_hash_find): Likewise.
(seh_hash_find_or_make): Likewise.
* config/obj-coff.c (tag_init): Likewise.
(tag_insert): Likewise.
(tag_find): Likewise.
* config/obj-elf.c (struct group_list): Likewise.
(build_additional_section_info): Likewise.
(free_section_idx): Likewise.
(elf_adjust_symtab): Likewise.
(elf_frob_file_after_relocs): Likewise.
* config/tc-aarch64.c (INSN_SIZE): Likewise.
(parse_reg): Likewise.
(insert_reg_alias): Likewise.
(create_register_alias): Likewise.
(s_unreq): Likewise.
(parse_shift): Likewise.
(parse_pldop): Likewise.
(parse_barrier): Likewise.
(parse_barrier_psb): Likewise.
(parse_bti_operand): Likewise.
(parse_sys_reg): Likewise.
(parse_sys_ins_reg): Likewise.
(lookup_mnemonic): Likewise.
(opcode_lookup): Likewise.
(parse_operands): Likewise.
(checked_hash_insert): Likewise.
(sysreg_hash_insert): Likewise.
(fill_instruction_hash_table): Likewise.
(md_begin): Likewise.
* config/tc-alpha.c (struct alpha_reloc_tag): Likewise.
(get_alpha_reloc_tag): Likewise.
(assemble_tokens_to_insn): Likewise.
(assemble_tokens): Likewise.
(md_begin): Likewise.
* config/tc-arc.c (arc_find_opcode): Likewise.
(arc_insert_opcode): Likewise.
(find_opcode_match): Likewise.
(declare_register): Likewise.
(declare_addrtype): Likewise.
(md_begin): Likewise.
(arc_parse_name): Likewise.
(tc_arc_regname_to_dw2regnum): Likewise.
(arc_extcorereg): Likewise.
* config/tc-arm.c (MVE_BAD_QREG): Likewise.
(arm_reg_parse_multi): Likewise.
(parse_reloc): Likewise.
(insert_reg_alias): Likewise.
(create_register_alias): Likewise.
(s_unreq): Likewise.
(parse_shift): Likewise.
(parse_psr): Likewise.
(parse_cond): Likewise.
(parse_barrier): Likewise.
(do_vfp_nsyn_opcode): Likewise.
(opcode_lookup): Likewise.
(arm_tc_equal_in_insn): Likewise.
(md_begin): Likewise.
* config/tc-avr.c (md_begin): Likewise.
(avr_ldi_expression): Likewise.
(md_assemble): Likewise.
(avr_update_gccisr): Likewise.
(avr_emit_insn): Likewise.
* config/tc-cr16.c (get_register): Likewise.
(get_register_pair): Likewise.
(get_index_register): Likewise.
(get_index_register_pair): Likewise.
(get_pregister): Likewise.
(get_pregisterp): Likewise.
(initialise_reg_hash_table): Likewise.
(md_begin): Likewise.
(cr16_assemble): Likewise.
(md_assemble): Likewise.
* config/tc-cris.c (cris_insn_first_word_frag): Likewise.
(md_begin): Likewise.
(cris_process_instruction): Likewise.
* config/tc-crx.c (get_register): Likewise.
(get_copregister): Likewise.
(md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-csky.c (md_begin): Likewise.
(parse_opcode): Likewise.
(get_operand_value): Likewise.
(v1_work_jbsr): Likewise.
(v2_work_rotlc): Likewise.
(v2_work_bgeni): Likewise.
(v2_work_not): Likewise.
* config/tc-d10v.c (sizeof): Likewise.
(md_begin): Likewise.
(do_assemble): Likewise.
(md_apply_fix): Likewise.
* config/tc-d30v.c (sizeof): Likewise.
(md_begin): Likewise.
(do_assemble): Likewise.
* config/tc-dlx.c (RELOC_DLX_VTENTRY): Likewise.
(md_begin): Likewise.
(machine_ip): Likewise.
* config/tc-ft32.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-h8300.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-hppa.c (pa_ip): Likewise.
(md_begin): Likewise.
* config/tc-i386.c (md_begin): Likewise.
(i386_print_statistics): Likewise.
(parse_insn): Likewise.
(process_operands): Likewise.
(i386_index_check): Likewise.
(parse_real_register): Likewise.
* config/tc-ia64.c (dot_rot): Likewise.
(dot_entry): Likewise.
(declare_register): Likewise.
(md_begin): Likewise.
(ia64_parse_name): Likewise.
(md_assemble): Likewise.
(dot_alias): Likewise.
(do_alias): Likewise.
(ia64_adjust_symtab): Likewise.
(do_secalias): Likewise.
(ia64_frob_file): Likewise.
* config/tc-m68hc11.c (m68hc11_print_statistics): Likewise.
(md_begin): Likewise.
(print_insn_format): Likewise.
(md_assemble): Likewise.
* config/tc-m68k.c (tc_gen_reloc): Likewise.
(m68k_ip): Likewise.
(md_begin): Likewise.
* config/tc-mcore.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-microblaze.c (md_begin): Likewise.
(md_assemble): Likewise.
(md_apply_fix): Likewise.
* config/tc-mips.c (nopic_need_relax): Likewise.
(md_begin): Likewise.
(macro_build): Likewise.
(mips16_macro_build): Likewise.
(mips_lookup_insn): Likewise.
(mips_ip): Likewise.
(mips16_ip): Likewise.
* config/tc-mmix.c (sizeof): Likewise.
(mmix_md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-mn10200.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-mn10300.c (HAVE_AM30): Likewise.
(md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-moxie.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-msp430.c (md_begin): Likewise.
(msp430_operands): Likewise.
(md_assemble): Likewise.
* config/tc-nds32.c (PV_DONT_CARE): Likewise.
(builtin_isreg): Likewise.
(builtin_regnum): Likewise.
(nds32_init_nds32_pseudo_opcodes): Likewise.
(nds32_lookup_pseudo_opcode): Likewise.
(nds32_relax_hint): Likewise.
(md_begin): Likewise.
(nds32_find_reloc_table): Likewise.
(nds32_elf_append_relax_relocs_traverse): Likewise.
(nds32_relax_branch_instructions): Likewise.
(md_convert_frag): Likewise.
(nds32_elf_analysis_relax_hint): Likewise.
(tc_nds32_regname_to_dw2regnum): Likewise.
* config/tc-nios2.c (nios2_opcode_lookup): Likewise.
(nios2_reg_lookup): Likewise.
(nios2_ps_lookup): Likewise.
(md_begin): Likewise.
* config/tc-ns32k.c (struct hash_control): Likewise.
(parse): Likewise.
(md_begin): Likewise.
* config/tc-pdp11.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-pj.c (fake_opcode): Likewise.
(alias): Likewise.
(md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-ppc.c (ppc_setup_opcodes): Likewise.
(md_assemble): Likewise.
* config/tc-pru.c (pru_opcode_lookup): Likewise.
(pru_reg_lookup): Likewise.
(md_begin): Likewise.
(md_end): Likewise.
* config/tc-riscv.c (init_ext_version_hash): Likewise.
(riscv_get_default_ext_version): Likewise.
(riscv_set_arch): Likewise.
(init_opcode_names_hash): Likewise.
(opcode_name_lookup): Likewise.
(enum reg_class): Likewise.
(hash_reg_name): Likewise.
(riscv_init_csr_hash): Likewise.
(reg_csr_lookup_internal): Likewise.
(reg_lookup_internal): Likewise.
(init_opcode_hash): Likewise.
(md_begin): Likewise.
(DECLARE_CSR): Likewise.
(macro_build): Likewise.
(riscv_ip): Likewise.
* config/tc-s390.c (register_name): Likewise.
(s390_setup_opcodes): Likewise.
(md_begin): Likewise.
(md_assemble): Likewise.
(s390_insn): Likewise.
* config/tc-score.c (struct s3_reg_map): Likewise.
(s3_score_reg_parse): Likewise.
(s3_dependency_type_from_insn): Likewise.
(s3_parse_16_32_inst): Likewise.
(s3_parse_48_inst): Likewise.
(s3_insert_reg): Likewise.
(s3_build_reg_hsh): Likewise.
(s3_build_score_ops_hsh): Likewise.
(s3_build_dependency_insn_hsh): Likewise.
(s3_begin): Likewise.
* config/tc-score7.c (struct s7_reg_map): Likewise.
(s7_score_reg_parse): Likewise.
(s7_dependency_type_from_insn): Likewise.
(s7_parse_16_32_inst): Likewise.
(s7_build_score_ops_hsh): Likewise.
(s7_build_dependency_insn_hsh): Likewise.
(s7_insert_reg): Likewise.
(s7_build_reg_hsh): Likewise.
(s7_begin): Likewise.
* config/tc-sh.c (EMPTY): Likewise.
(md_begin): Likewise.
(find_cooked_opcode): Likewise.
* config/tc-sparc.c (md_begin): Likewise.
(sparc_ip): Likewise.
* config/tc-spu.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-tic30.c (md_begin): Likewise.
(tic30_operand): Likewise.
(tic30_parallel_insn): Likewise.
(md_assemble): Likewise.
* config/tc-tic4x.c (TIC4X_ALT_SYNTAX): Likewise.
(tic4x_asg): Likewise.
(tic4x_inst_insert): Likewise.
(tic4x_inst_add): Likewise.
(md_begin): Likewise.
(tic4x_operand_parse): Likewise.
(md_assemble): Likewise.
* config/tc-tic54x.c (MAX_SUBSYM_HASH): Likewise.
(stag_add_field_symbols): Likewise.
(tic54x_endstruct): Likewise.
(tic54x_tag): Likewise.
(tic54x_remove_local_label): Likewise.
(tic54x_clear_local_labels): Likewise.
(tic54x_var): Likewise.
(tic54x_macro_start): Likewise.
(tic54x_macro_info): Likewise.
(tic54x_macro_end): Likewise.
(subsym_isreg): Likewise.
(subsym_structsz): Likewise.
(md_begin): Likewise.
(is_mmreg): Likewise.
(is_type): Likewise.
(encode_condition): Likewise.
(encode_cc3): Likewise.
(encode_cc2): Likewise.
(encode_operand): Likewise.
(tic54x_parse_insn): Likewise.
(tic54x_parse_parallel_insn_firstline): Likewise.
(subsym_create_or_replace): Likewise.
(subsym_lookup): Likewise.
(subsym_substitute): Likewise.
(tic54x_undefined_symbol): Likewise.
* config/tc-tic6x.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-tilegx.c (O_hw2_last_plt): Likewise.
(INSERT_SPECIAL_OP): Likewise.
(md_begin): Likewise.
(tilegx_parse_name): Likewise.
(parse_reg_expression): Likewise.
(md_assemble): Likewise.
* config/tc-tilepro.c (O_tls_ie_load): Likewise.
(INSERT_SPECIAL_OP): Likewise.
(tilepro_parse_name): Likewise.
(parse_reg_expression): Likewise.
(md_assemble): Likewise.
* config/tc-v850.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-vax.c (md_ri_to_chars): Likewise.
(vip_begin): Likewise.
(vip): Likewise.
(main): Likewise.
(md_begin): Likewise.
* config/tc-wasm32.c (md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-xgate.c (xgate_parse_operand): Likewise.
(md_begin): Likewise.
(md_assemble): Likewise.
* config/tc-z8k.c (md_begin): Likewise.
(md_assemble): Likewise.

Port dw2gencfi.c to str_htab.

* dw2gencfi.c (dwcfi_hash_insert): Use htab_t and str_hash_*
functions.
(dwcfi_hash_find): Likewise.
(dwcfi_hash_find_or_make): Likewise.

Port ecoff.c to str_hash.

* ecoff.c (INIT_VARRAY): Use htab_t.
(add_string): Likewise.
(ecoff_read_begin_hook): Use new str_htab_create.
(get_tag): Use htab_t.
(add_file): Likewise.

Add new string hash table based on htab_t.

* hash.h (struct string_tuple): New.
(hash_string_tuple): Likewise.
(eq_string_tuple): Likewise.
(string_tuple_alloc): Likewise.
(str_hash_find): Likewise.
(str_hash_find_n): Likewise.
(str_hash_delete): Likewise.
(str_hash_insert): Likewise.
(str_htab_create): Likewise.

Use libiberty hash in gas/symbols.c.

* symbols.c (struct symbol_entry): New.
(hash_symbol_entry): Likewise.
(eq_symbol_entry): Likewise.
(symbol_entry_alloc): Likewise.
(symbol_entry_find): Likewise.
(local_symbol_make): Use htab hash table.
(local_symbol_convert): Likewise.
(symbol_table_insert): Likewise.
(symbol_find_exact_noref): Likewise.
(resolve_local_symbol): Likewise.
(resolve_local_symbol_values): Likewise.
(symbol_begin): Likewise.
(symbol_print_statistics): Likewise.

Use libiberty hash in gas/read.c.

* read.c (struct po_entry): New.
(hash_po_entry): Likewise.
(eq_po_entry): Likewise.
(po_entry_alloc): Likewise.
(po_entry_find): Likewise.
(pop_insert): Likewise.
(pobegin): Use htab hash table.
(read_a_source_file): Likewise.
(s_macro): Likewise.
(read_print_statistics): Likewise.
* config/tc-m68k.c (m68k_conditional_pseudoop): Add const qualifier.
* config/tc-m68k.h (m68k_conditional_pseudoop): Likewise.

Use libiberty hash in gas/macro.c.

* config/tc-iq2000.c (iq2000_add_macro): Use htab hash table.
* macro.c (struct hash_control): Use htab.
(macro_init): Likewise.
(do_formals): Likewise.
(free_macro): Likewise.
(define_macro): Likewise.
(sub_actual): Likewise.
(macro_expand_body): Likewise.
(macro_expand): Likewise.
(check_macro): Likewise.
(delete_macro): Likewise.
(expand_irp): Likewise.
* macro.h (struct macro_hash_entry): New struct.
(hash_macro_entry): New.
(eq_macro_entry): Likewise.
(macro_entry_alloc): Likewise.
(macro_entry_find): Likewise.
(struct formal_hash_entry): Likewise.
(hash_formal_entry): Likewise.
(eq_formal_entry): Likewise.
(formal_entry_alloc): Likewise.
(formal_entry_find): Likewise.

gas/hash.c: add new functions

The first of a patch series deleting the gas/hash.c hash table
implementation and instead using libiberty/hashtab.c hash tables in
gas.

* as.h: Include hashtab.h.
* hash.c (htab_insert): New.
(htab_print_statistics): Likewise.
* hash.h (htab_insert): Likewise.
(htab_print_statistics): Likewise.

Automatic date update in version.in

PR26349, FAIL: binutils-all/pr25543 on hpux

The 't' length modifier isn't in SUSv2, unsurprisingly %tx isn't
recognized by older printf implementations.  So even though 't' is
correct for ptrdiff_t we can't use it.  Also, _bfd_int64_high and
_bfd_int64_low disappeared in 2008.

PR 26349
* readelf.c (dump_relocations): Use BFD_VMA_FMT to print offset
and info fields.
(dump_section_as_strings): Don't use %tx to display offset.

gdb: add linux_nat_debug_printf macro

The debug prints inside linux-nat.c almost all have a prefix that
indicate in which function they are located.  This prefix is an
abbreviation of the function name.  For example, this print is in the
`linux_nat_post_attach_wait` function:

    if (debug_linux_nat)
      fprintf_unfiltered (gdb_stdlog,
                          "LNPAW: Attaching to a stopped process\n");

Over time, the code has changed, things were moved, and many of these
prefixes are not accurate anymore.  Also, unless you know the
linux-nat.c file by heart, it's a bit cryptic what LLR, LNW, RSRL, etc,
all mean.

To address both of these issues, I suggest adding this macro for
printing debug statements, which automatically includes the function
name.  It also includes the `[linux-nat]` prefix to clarify which part
of GDB printed this (I think that, ideally, all debug prints would
include such a tag).

The `__func__` magic symbol is used to get the function name.
Unfortunately, in the case of methods, it only contains the method name,
not the class name.  So we'll get "wait", where I would have liked to
get "linux_nat_target::wait".  But at least with the `[linux-nat]` tag
in the front, it's not really ambiguous.

I've made the macro automatically include the trailing newline, because
it wouldn't make sense to call it twice to print two parts of one line,
the `[linux-nat]` tag would be printed in the middle.

An advantage of this (IMO) is that it's less verbose, we don't have to
check for `if (debug_linux_nat)` everywhere.

Another advantage is that it's easier to customize the output later,
without having to touch all call sites.

Here's an example of what it looks like in the end:

    [linux-nat] linux_nat_wait_1: enter
    [linux-nat] wait: [process -1], [TARGET_WNOHANG]

gdb/ChangeLog:

* linux-nat.c (linux_nat_debug_printf): New function.
(linux_nat_debug_printf_1): New macro.  Use throughout the file.

Change-Id: Ifcea3255b91400d3ad093cd0b75d3fac241cb998

Automatic date update in version.in

Correct vcmpsq, vcmpuq and xvtlsbb BF field

These shouldn't be optional.  The record form of vector instructions
set CR6, giving an expectation that omitting BF should be the same as
specifying CR6.

opcodes/
* ppc-opc.c (powerpc_opcodes): Replace OBF with BF for vcmpsq,
vcmpuq and xvtlsbb.
gas/
* testsuite/gas/ppc/int128.s: Correct vcmpuq.
* testsuite/gas/ppc/int128.d: Update.
* testsuite/gas/ppc/xvtlsbb.d: Update.

gdb/Makefile.in: Add DEBUGINFOD_CFLAGS, DEBUGINFOD_LIBS variables.

Introduce Makefile variables DEBUGINFOD_CFLAGS and DEBUGINFOD_LIBS
that map to the configuration variables of the same names.

Replace @DEBUGINFOD_LIBS@ with $(DEBUGINFOD_LIBS) in the definition
of CLIBS in order to conform to the usage of other *_LIBS variables
in Makefile.in.

Add DEBUGINFOD_CFLAGS to INTERNAL_CFLAGS_BASE. This fixes an issue
where GDB would fail to find debuginfod.h if it was not installed
in a default location searched by the compiler.

gdb/ChangeLog:

* Makefile.in (DEBUGINFOD_CFLAGS, DEBUGINFOD_LIBS): New variables.
(INTERNAL_CFLAGS_BASE): Add DEBUGINFOD_CFLAGS.
(CLIBS): Add DEBUGINFOD_LIBS.

Add ChangeLog entries for previous commit.

PowerPC: Rename xvcvbf16sp to xvcvbf16spn

The xvcvbf16sp mnemonic has been renamed to xvcvbf16spn, to be consistent
with the other non-signaling conversion instructions which all end with "n".

opcodes/
* ppc-opc.c (powerpc_opcodes) <xvcvbf16sp>: Rename from this...
<xvcvbf16spn>: ...to this.

gas/
* testsuite/gas/ppc/vsx4.s: Update test to use new mnemonic.
* testsuite/gas/ppc/vsx4.d: Likewise.

Automatic date update in version.in

gdb: fix IA64 build failure of linux-nat

On IA64 built failed as:

```
ia64-linux-nat.c:352:29: error: 'gdbarch_num_regs' was not declared in this scope
  352 |   if (regno < 0 || regno >= gdbarch_num_regs (gdbarch))
      |                             ^~~~~~~~~~~~~~~~
```

The fix includes "gdbarch.h" header where symbol is declared.

* ia64-linux-nat.c: Include "gdbarch.h" to declare used
'gdbarch_num_regs'.

Signed-off-by: Sergei Trofimovich <siarheit@google.com>

Update xfail pattern in gdb.rust/simple.exp

In PR rust/26197, Tom de Vries notes that the variant part rewrite
caused some regressions for the Rust compiler he has.  This compiler
is unusual in that it combines a relatively recent rustc with a
relatively old LLVM -- so variant parts are not emitted using DWARF.

Most of the bugs in that PR were already fixed by earlier patches, but
some lingered.  After some research we found that some of these never
did work -- which is consistent with the investigations we did into
the debug info -- but instead were xfail'd.  This patch updates the
xfails to cope with the new output.  (After this, just one failure
remains.)

Tom de Vries tested this using his rustc and suggested a fix that
appears in this version.

gdb/testsuite/ChangeLog
2020-08-17  Tom de Vries  <tdevries@suse.de>
    Tom Tromey  <tromey@adacore.com>

PR rust/26197:
* gdb.rust/simple.exp (xfail_pattern): Update for new failure.

Fix MI crash with Ada string access

I happened to notice that using -var-create at a certain spot in an
Ada program caused a crash.  This happens because
ada_get_decoded_value can return NULL -- in particular, deeper in the
code it can hit this return in ada_type_of_array:

      descriptor = desc_bounds (arr);
      if (value_as_long (descriptor) == 0)
        return NULL;

This patch avoids the crash by handling this NULL return.

gdb/ChangeLog
2020-08-17  Tom Tromey  <tromey@adacore.com>

* ada-varobj.c (ada_varobj_decode_var): Handle case where
ada_get_decoded_value returns NULL.

gdb/testsuite/ChangeLog
2020-08-17  Tom Tromey  <tromey@adacore.com>

* gdb.ada/mi_var_access.exp: New file.
* gdb.ada/mi_var_access/mi_access.adb: New file.
* gdb.ada/mi_var_access/pck.adb: New file.
* gdb.ada/mi_var_access/pck.ads: New file.

Convert CORE_ADDR to Python using gdb_py_object_from_ulongest

An internal test failed on a riscv64-elf cross build because
Inferior.search_memory returned a negative value.  I tracked this down
to to use of PyLong_FromLong in infpy_search_memory.  Then, I looked
at other conversions of CORE_ADDR to Python and fixed these as well.

I don't think there is a good way to write a test for this.

gdb/ChangeLog
2020-08-17  Tom Tromey  <tromey@adacore.com>

* python/py-inferior.c (infpy_search_memory): Use
gdb_py_object_from_ulongest.
* python/py-infevents.c (create_inferior_call_event_object)
(create_memory_changed_event_object): Use
gdb_py_object_from_ulongest.
* python/py-linetable.c (ltpy_entry_get_pc): Use
gdb_py_object_from_ulongest.

gdb: fix wrong indentation in symbol_needs_eval_context

gdb/ChangeLog:

* loc.c (class symbol_needs_eval_context): Fix indentation.

Change-Id: Ibf4e6a9ca9573b498737a61db116ee10b287b7f5

gdb: use bool in dwarf2_loc_desc_get_symbol_read_needs

This variable is really a boolean, so use the bool type.

gdb/ChangeLog:

* dwarf2/loc.c (dwarf2_loc_desc_get_symbol_read_needs): Use
bool.

Change-Id: I814a47d1200f3b88722c54c822fd49607a6b77be

gas: Fix internal error in S_SET_SEGMENT

This patch fixes an internal error in GAS when defining a section using
a symbol that has already been named but not defined. For a minimal
reproducer, try the following input:

a=b
.sect a

The problem is that obj_elf_change_section() happily reuses the symbol
"a" created by equals() without clearing the sy_value field: prior to
this patch, it just set bsym. This caused a problem when attempting to
resolve the section symbol, since resolve_symbol_value() ended up
resolving the symbol as if it were the original symbol created by
equals(), which ends up leaving the section symbol in the undefined
section instead of in section a, hence the call to abort() in
S_SET_SEGMENT().

gas/ChangeLog:

* config/obj-elf.c (obj_elf_change_section): When repurposing an
existing symbol, ensure that we set sy_value as per other (fresh)
section symbols.
* testsuite/gas/elf/elf.exp: Add new test.
* testsuite/gas/elf/section-symbol-redef.d: New test.
* testsuite/gas/elf/section-symbol-redef.s: Input for test.

[gdb] Fix printing of unresolved dynamic type

When debugging gdb in batch mode with executable mixed-lang-stack and doing a
backtrace at breakpt:
...
$ gdb --args gdb \
  -batch \
  outputs/gdb.fortran/mixed-lang-stack/mixed-lang-stack \
  -ex "b breakpt" \
  -ex r \
  -ex bt
...
and stopping at resolve_dynamic_type to print the type:
...
(gdb) b resolve_dynamic_type
Breakpoint 1 at 0x6b020c: file gdbtypes.c, line 2633.
(gdb) commands
Type commands for breakpoint(s) 1, one per line.
End with a line saying just "end".
>call recursive_dump_type (type, 0)
>continue
>end
(gdb) run
...
we eventually run into an assert for the dynamic type of "str":
...
Thread 1 "gdb" hit Breakpoint 1, resolve_dynamic_type (type=0x22204f0, \
  valaddr=..., addr=4199408) at gdbtypes.c:2633
2633        = {check_typedef (type), valaddr, addr, NULL};
type node 0x22204f0
name '<NULL>' (0x0)
code 0xd (TYPE_CODE_STRING)
length 0
  ...
    nfields 0 0x22204b0
gdbtypes.h:526: internal-error: LONGEST dynamic_prop::const_val() const: \
  Assertion `m_kind == PROP_CONST' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
...
when trying to print the high bound of a TYPE_CODE_RANGE, which has m_kind
PROP_LOCEXPR, while the code in resolve_dynamic_type assumes PROP_CONST.

Fix this by extending the printing of TYPE_CODE_RANGE to allow
PROP_LOCEXPR/PROP_LOCLIST as well, such that we have instead:
...
    nfields 0 0x1fbc020
    low 1  high (dynamic)
...

Tested on x86_64-linux.

gdb/ChangeLog:

2020-08-17  Tom de Vries  <tdevries@suse.de>

PR gdb/26393
* gdbtypes.c (dump_dynamic_prop): New function.
(recursive_dump_type): Use dump_dynamic_prop for TYPE_CODE_RANGE.

Automatic date update in version.in

PowerPC64 inline PLT call tests

* testsuite/ld-powerpc/inline.s,
* testsuite/ld-powerpc/inline-1.d,
* testsuite/ld-powerpc/inline-2.d,
* testsuite/ld-powerpc/inline-3.d,
* testsuite/ld-powerpc/inline-4.d,
* testsuite/ld-powerpc/inlinepcrel.s,
* testsuite/ld-powerpc/inlinepcrel-1.d,
* testsuite/ld-powerpc/inlinepcrel-2.d,
* testsuite/ld-powerpc/inlinepcrel-3.d: New tests.
* testsuite/ld-powerpc/powerpc.exp: Run them.

ld: Add a PR binutils/26389 test

PR binutils/26389
* testsuite/ld-plugin/lto.exp: Run PR binutils/26389 test.
* testsuite/ld-plugin/pr26389.c: New file.
* testsuite/ld-plugin/pr26389.d: Likewise.

[gdb/testsuite] Add gdb.base/eh_return.exp

In PR25350, an internal error was reported:
...
(gdb) break *eh2+0x7e
Breakpoint 1 at 0x13e2: file small.c, line 38.
(gdb) run
Starting program: a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Breakpoint 1, 0x00005555555553e2 in eh2 (
frame.c:558: internal-error: frame_id get_frame_id(frame_info*): \
  Assertion `stashed' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
...

The internal error does not reproduce after recent commit 547ce8f00b
"[gdb/backtrace] Fix printing of fortran string args".

Add the corresponding test-case as regression test, given that the code is
rather atypical.

Tested on x86_64-linux.

gdb/testsuite/ChangeLog:

2020-08-16  Tom de Vries  <tdevries@suse.de>

PR gdb/25350
* gdb.base/eh_return.c: New test.
* gdb.base/eh_return.exp: New file.

Automatic date update in version.in

[gdb/testsuite] Fix charlen type in mixed-lang-stack.c

In gdb.fortran/mixed-lang-stack.f90, we have fortran function mixed_func_1d:
...
subroutine mixed_func_1d(a, b, c, d, str)
  use, intrinsic :: iso_c_binding, only: c_int, c_float, c_double
  use, intrinsic :: iso_c_binding, only: c_float_complex
  implicit none
  integer(c_int) :: a
  real(c_float) :: b
  real(c_double) :: c
  complex(c_float_complex) :: d
  character(len=*) :: str
...
which we declare in C in gdb.fortran/mixed-lang-stack.c like this:
...
extern void mixed_func_1d_ (int *, float *, double *, complex float *,
                            char *, size_t);
...

The fortran string parameter str is passed as a char *, and an additional
argument str_ for the string length.  The type used for the string length
argument is size_t, but for gcc 7 and earlier, the actual type is int
instead ( see
https://gcc.gnu.org/onlinedocs/gfortran/Argument-passing-conventions.html ).

Fix this by declaring the string length type depending on the gcc version:
...
 #if !defined (__GNUC__) || __GNUC__ > 7
 typedef size_t fortran_charlen_t;
 #else
 typedef int fortran_charlen_t;
...

Tested on x86_64-linux, with gcc-7 and gcc-8.

gdb/testsuite/ChangeLog:

2020-08-15  Tom de Vries  <tdevries@suse.de>

* gdb.fortran/mixed-lang-stack.c (fortran_charlen_t): New type.
(mixed_func_1d_): Use fortran_charlen_t in decl.

[gdb/backtrace] Fix printing of fortran string args

When running test-case gdb.fortran/mixed-lang-stack.exp, it passes, but we
find in gdb.log:
...
 (gdb) bt^M
   ...
 #7  0x000000000040113c in mixed_func_1b (a=1, b=2, c=3, d=(4,5), \
   e=<error reading variable: value requires 140737488341744 bytes, which \
   is more than max-value-size>, g=..., _e=6) at mixed-lang-stack.f90:87^M
...
while a bit later in gdb.log, we have instead for the same frame (after
adding a gdb_test_no_output "set print frame-arguments all" to prevent
getting "e=..."):
...
 (gdb) up^M
 #7  0x000000000040113c in mixed_func_1b (a=1, b=2, c=3, d=(4,5), \
   e='abcdef', g=( a = 1.5, b = 2.5 ), _e=6) at mixed-lang-stack.f90:87^M
...

The difference is that in the latter case, we print the frame while it's
selected, while in the former, it's not.

The problem is that while trying to resolve the dynamic type of e in
resolve_dynamic_type, we call dwarf2_evaluate_property with a frame == NULL
argument, and then use the selected frame as the context in which to evaluate
the dwarf property, effectively evaluating a DW_OP_fbreg operation in the
wrong frame context.

Fix this by temporarily selecting the frame of which we're trying to print the
arguments in print_frame_args, borrowing code from print_frame_local_vars that
was added to fix a similar issue in commit 16c3b12f19 "error/internal-error
printing local variable during "bt full".

Build and tested on x86_64-linux.

gdb/ChangeLog:

2020-08-15  Tom de Vries  <tdevries@suse.de>

PR backtrace/26390
* stack.c (print_frame_args): Temporarily set the selected
frame to FRAME while printing the frame's arguments.

gdb/testsuite/ChangeLog:

2020-08-15  Tom de Vries  <tdevries@suse.de>

PR backtrace/26390
* gdb.fortran/mixed-lang-stack.exp: Call bt with -frame-arguments all.
Update expected pattern.

Set SEC_SMALL_DATA on small common

Unlike the previous patch setting SEC_SMALL_DATA during
elf_backend_symbol_processing, this patch is mostly cosmetic.

* elf32-frv.c (elf32_frv_add_symbol_hook): Set SEC_SMALL_DATA on
small common section.
* elf32-m32r.c (m32r_elf_add_symbol_hook): Likewise.
* elf32-microblaze.c (microblaze_elf_add_symbol_hook): Likewise.
* elf32-nds32.c (nds32_elf_add_symbol_hook): Likewise.
* elf32-nios2.c (nios2_elf_add_symbol_hook): Likewise.
* elf32-ppc.c (ppc_elf_add_symbol_hook): Likewise.
* elf32-score.c (s3_bfd_score_elf_add_symbol_hook): Likewise.
* elf32-score7.c (s7_bfd_score_elf_add_symbol_hook): Likewise.
* elf32-tic6x.c (elf32_tic6x_add_symbol_hook): Likewise.
* elf32-v850.c (v850_elf_check_relocs): Likewise.
(v850_elf_add_symbol_hook): Likewise.
* elf64-alpha.c (elf64_alpha_add_symbol_hook): Likewise.
* elf64-ia64-vms.c (elf64_ia64_add_symbol_hook): Likewise.
* elfnn-ia64.c (elfNN_ia64_add_symbol_hook): Likewise.
* elfxx-mips.c (_bfd_mips_elf_add_symbol_hook): Likewise.

PR26389, nm prints "c" for a common symbol with -flto and -fcommon

git commit 49d9fd42acef chose to make nm print 'C' for the normal
common section, and 'c' for other commons.  This was an attempt to
make common symbols in .scommon and other small common sections show
a 'c' type without a section name comparison, but it failed for
nm --plugin on lto objects where normal common symbols are stashed in
a "plug" section.  It's also wrong for large common symbols.  So
instead set SEC_SMALL_DATA on sections created for small commons, and
key off that flag to show 'c' type.  If your ELF target doesn't have
an elf_backend_symbol_processing function, then you won't see 'c' for
symbols in .scommon.

Note that due to bfd_decode_symclass decoding common symbols without
a chance for coff_section_type to treat .scommon specially, then
having .scommon in the array of special sections handled by
coff_section_type prior to 49d9fd42acef was entirely ineffective.
That fact escaped me when writing 49d9fd42acef.  Unless .scommon
didn't have SEC_IS_COMMON set, which would be a little weird.

PR 26389
* syms.c (bfd_decode_symclass): Choose 'c' for commons only when
SEC_SMALL_DATA.
* elf32-m32r.c (_bfd_m32r_elf_symbol_processing): Set SEC_SMALL_DATA
on small common section.
* elf32-score.c (s3_bfd_score_elf_symbol_processing): Likewise.
* elf32-score7.c (s7_bfd_score_elf_symbol_processing): Likewise.
* elf32-tic6x.c (elf32_tic6x_symbol_processing): Likewise.
* elf32-v850.c (v850_elf_symbol_processing): Likewise.
* elfxx-mips.c (_bfd_mips_elf_symbol_processing): Likewise.
* ecoff.c (ecoff_set_symbol_info, ecoff_link_add_externals): Likewise.

Automatic date update in version.in

[PowerPC] Always clear watchpoint with PTRACE_SET_DEBUGREG

This patches changes low_prepare_to_resume in the ppc linux native target
to always clear the watchpoint when the old PTRACE_SET_DEBUGREG interface
is used, even if another watchpoint GDB requested to the target is
written right after using the same call.

The reason for this is that there were some older kernel versions for
which overwriting a watchpoint with PTRACE_SET_DEBUGREG would not
re-activate the watchpoint if it was previouly disabled following a hit.
This happened when the kernel was configured with CONFIG_HW_BREAKPOINT on
and uses perf events to install watchpoints.

Previously, the ppc linux native target would immediately remove or
insert watchpoints following a request from the upper layers.  This was
changed in commit 227c0bf4b3dd0cf65dceb58e729e9da81b38b5a7 to fix other
issues, which caused watchpoint requests to be applied to the inferior
only in low_prepare_to_resume, right before the inferior is resumed.

Usually, but maybe not always, after a hit, GDB will remove the
watchpoint, resume the inferior for a single-step, possibly report the
watchpoint hit to the user, and then re-insert the watchpoint before the
inferior is next resumed.  In this case there would be no problems, but
since I can't guarantee that there aren't other paths in GDB that allow
the user to set a new watchpoint after the first one hit, and after its
deletion by GDB, but before the inferior is resumed, there is a chance
that PTRACE_SET_DEBUGREG could be called directly without the watchpoint
first having been cleared, which could cause a false negative with the
older kernel versions.

This issue would affect kernel versions starting from this commit:

5aae8a53708025d4e718f0d2e7c2f766779ddc71

Up to the fix in this commit:

a53fd61ac2f411745471c1c877d5e072fbbf0e5c

gdb/ChangeLog:

PR breakpoints/26385
* ppc-linux-nat.c (ppc_linux_nat_target::low_prepare_to_resume):
Always clear watchpoint with PTRACE_SET_DEBUGREG.