Sometimes relocations would emit an incorrect address,
define some macros to prevent fixup_segment from messing
up the fixups.

While reading that code, I noticed that some variables essentially meant
whether to consider some other variable or not.  I think using
gdb::optional (which was not available when this code was written) is
clearer, as it embeds the used/not used predicate directly in the type
of the variable, making it harder to miss.

gdb/ChangeLog:

	* dwarf2read.c (struct dw2_symtab_iterator):
	<want_specific_block>: Remove.
	<block_index>: Change type to gdb::optional.
	(dw2_symtab_iter_init): Remove WANT_SPECIFIC_BLOCK parameter,
	change type of BLOCK_INDEX parameter to gdb::optional.
	(dw2_symtab_iter_next): Re-write in function of gdb::optional.
	(dw2_lookup_symbol): Don't pass argument for
	WANT_SPECIFIC_BLOCK.
	(dw2_expand_symtabs_for_function): Don't pass argument for
	WANT_SPECIFIC_BLOCK, pass empty optional for BLOCK_INDEX.
	(class dw2_debug_names_iterator)
	<dw2_debug_names_iterator>: Remove WANT_SPECIFIC_BLOCK
	parameter, change BLOCK_INDEX type to gdb::optional.
	<m_want_specific_block>: Remove.
	<m_block_index>: Change type to gdb::optional.
	(dw2_debug_names_iterator::next): Change type of IS_STATIC to
	gdb::optional.  Re-write in function of gdb::optional.
	(dw2_debug_names_lookup_symbol): Don't pass argument for
	WANT_SPECIFIC_BLOCK.
	(dw2_debug_names_expand_symtabs_for_function): Don't pass
	argument for WANT_SPECIFIC_BLOCK, pass empty optional for
	BLOCK_INDEX.

2019-08-04  Sandra Loosemore  <sandra@codesourcery.com>

	gdb/testsuite/
	* gdb.server/reconnect-ctrl-c.exp: Skip if nointerrupts.

2019-08-04  Sandra Loosemore  <sandra@codesourcery.com>

	gdb/testsuite/
	* lib/completion-support.exp (test_gdb_complete_none): Skip
	tab completion tests if no readline support.
	(test_gdb_complete_unique_re): Likewise.
	(test_gdb_complete_multiple): Likewise.

gdb/ChangeLog
2019-08-03  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

        * NEWS: Mention changes to "info sources" command.

gdb/doc/ChangeLog
2019-08-03  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

        * gdb.texinfo (Symbols): Document new args -dirname and -basename
        of "info sources" command.

This patch introduces a test for the 'info sources' command
and its new arguments [-dirname | -basename] [--] [REGEXP].

gdb/testsuite/ChangeLog

2019-08-03  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* gdb.base/info_sources.exp: New file.
	* gdb.base/info_sources.c: New file.
	* gdb.base/info_sources_base.c: New file.

gdb/ChangeLog

2019-08-03  Philippe Waroquiers  <philippe.waroquiers@skynet.be>

	* symtab.c (filename_partial_match_opts): New struct type.
	(struct output_source_filename_data): New members
	regexp, c_regexp, partial_match.
	(output_source_filename): Use new members to decide to print file.
	(info_sources_option_defs): New variable.
	(make_info_sources_options_def_group, print_info_sources_header,
	info_sources_command_completer):
	New functions.
	(info_sources_command): Read new optional arguments.
	(_initialize_symtab): Update info sources help.

A new pair of hooks used by Ada exception handlers, for correct
release of reraised exception occurrences, involves the introduction
of new v1 symbols that GDB should use when available.  The older, v0
ABI remains available in newer runtimes for bootstrapping purposes
only.


for  gdb/ChangeLog

	* ada-lang.c (exception_support_info_v0): Renamed from...
	(default_exception_support_info): ... this.  Create new
	definition for v1.
	(ada_has_this_exception_support): Look up catch_handlers_sym.
	(ada_exception_support_info_sniffer): Try v0 after default.

Gold version of git commit c213164a.

elfcpp/
	* powerpc.h (R_PPC64_TPREL34, R_PPC64_DTPREL34),
	(R_PPC64_GOT_TLSGD34, R_PPC64_GOT_TLSLD34),
	(R_PPC64_GOT_TPREL34, R_PPC64_GOT_DTPREL34): Define.
gold/
	* powerpc.cc (Target_powerpc::Scan::get_reference_flags): Set
	flags for new relocations, and some missing older relocs.
	(Target_powerpc::Scan::local): Handle new pcrel tls relocs.
	Call set_has_static_tls for tprel relocs.
	(Target_powerpc::Scan::global): Likewise.
	(Target_powerpc::Relocate::relocate): Handle new pcrel tls relocs.

Relocations with right shifts were calculating wrong overflow status.
Since the addr34 split-field reloc is implemented as an 18-bit high
part with value shifted right by 16 and a 16-bit low part, most of the
pc-relative relocs were affected.

	* powerpc.cc (Powerpc_relocate_functions::rela, rela_ua): Perform
	signed right shift for signed overflow check.

	PR 24871
	* readelf.c (ABSADDR): Delete.
	(dump_ia64_unwind): Expand ABSADDR.  Check validity of info.section.

	* testsuite/ld-powerpc/tlsie.s: Correct medium model ELF sequence.

	bfd/ChangeLog
	Ilia Diachkov  <ilia.diachkov@optimitech.com>
	* elfnn-riscv.c (_bfd_riscv_relax_lui): Set lui relax safety area to
	two pages in relro presence.

Adjust gdb.base/batch-exit-status.exp so that test prefixes don't show
directory names for the source scripts passed with -x, to make test
results from different build directories comparable.

gdb/testsuite/ChangeLog:
2019-08-01  Pedro Franco de Carvalho  <pedromfc@linux.ibm.com>

	* gdb.base/batch-exit-status.exp: Call test_exit_status with
	prefix argument.
	(test_exit_status): Add prefix argument.

check_loop_aligned is used during link time relaxation to only allow
transformations that don't violate loop body alignment requirements.
Assembler can relax loops that have too long body by adding instructions
between the loop instruction and the loop body. check_loop_aligned must
check alignment of the first instruction of the actual loop body.
Detect loop / rsr.lend / wsr.lbeg sequence used in assembly time
relaxation and adjust alignment check when it's detected.

bfd/
2019-08-01  Max Filippov  <jcmvbkbc@gmail.com>

	* elf32-xtensa.c (insn_num_slots, get_rsr_lend_opcode)
	(get_wsr_lbeg_opcode): New functions.
	(check_loop_aligned): Detect relaxed loops and adjust loop_len
	and insn_len for the first actual instruction of the loop.

This fixes the ia64 libunwind build.

gdb/ChangeLog
2019-08-01  Tom Tromey  <tromey@adacore.com>

	* ia64-libunwind-tdep.h (struct libunwind_descr): Include
	gdbarch.h.

This file exists in binutils-gdb/opcodes, and nothing in Makefile.in adds this
to the include path.  Default builds work because in-tree readline adds
binutils-gdb/ to the include path (!). However, this is broken when compiling
with system readline.

Other files already use this way to include files in opcodes:
./gdb/lm32-tdep.c:#include "../opcodes/lm32-desc.h"
./gdb/or1k-tdep.h:#include "../opcodes/or1k-desc.h"
./gdb/mep-tdep.c:#include "../opcodes/mep-desc.h"

etc.

gdb/ChangeLog:

2019-08-01  Christian Biesinger  <cbiesinger@google.com>

	* s12z-tdep.c: Fix include path for s12z-opc.h.

Gdbserver has failed to build with GNU make 3.81 since commit 08f10e02.

Update the NEWS file to state that versions earlier than 3.82 are not
supported.

3.82 was released in 2010, 3.81 was released 2006. A quick investigation
of the default GNU make version provided across various distros found the
earliest provided version to be 3.82:
*RHEL 7, Centos 6 - make 3.82
*Fedora 27 - make 4.2.1
*OpenSuse 42.2, SLES11 - make 4.2.1
*Ubuntu 16.04/18.04 - make 4.1
*Debian Jessie - make 4.0

Note that Glibc requires at least 4.0, whereas GCC still allows 3.81.

gdb/ChangeLog:

	* NEWS: Require GNU make 3.82.