For R_MIPS16_PC16_S1 the calculation is `(sign_extend(A) + S - P) >> 1'
and the usual MIPS16 bit shuffling applies to relocated field handling,
as per the encoding of the branch target in the extended form of the
MIPS16 B, BEQZ, BNEZ, BTEQZ and BTNEZ instructions.

	include/
	* elf/mips.h (R_MIPS16_PC16_S1): New relocation.

	bfd/
	* elf32-mips.c (elf_mips16_howto_table_rel): Add
	R_MIPS16_PC16_S1.
	(mips16_reloc_map): Likewise.
	* elf64-mips.c (mips16_elf64_howto_table_rel): Likewise.
	(mips16_elf64_howto_table_rela): Likewise.
	(mips16_reloc_map): Likewise.
	* elfn32-mips.c (elf_mips16_howto_table_rel): Likewise.
	(elf_mips16_howto_table_rela): Likewise.
	(mips16_reloc_map): Likewise.
	* elfxx-mips.c (mips16_branch_reloc_p): New function.
	(mips16_reloc_p): Handle R_MIPS16_PC16_S1.
	(b_reloc_p): Likewise.
	(mips_elf_calculate_relocation): Likewise.
	(_bfd_mips_elf_check_relocs): Likewise.
	* reloc.c (BFD_RELOC_MIPS16_16_PCREL_S1): New relocation.
	* bfd-in2.h: Regenerate.
	* libbfd.h: Regenerate.

	gas/
	* config/tc-mips.c (mips16_reloc_p): Handle
	BFD_RELOC_MIPS16_16_PCREL_S1.
	(b_reloc_p): Likewise.
	(limited_pcrel_reloc_p): Likewise.
	(md_pcrel_from): Likewise.
	(md_apply_fix): Likewise.
	(tc_gen_reloc): Likewise.
	(md_convert_frag): Likewise.
	(mips_fix_adjustable): Update comment.
	* testsuite/gas/mips/mips16-branch-reloc-2.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-branch-reloc-3.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-branch-addend-2.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-branch-addend-3.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-branch-absolute.d: Remove error
	output, add dump patterns.
	* testsuite/gas/mips/mips16-branch-reloc-2.l: Remove file.
	* testsuite/gas/mips/mips16-branch-reloc-3.l: Remove file.
	* testsuite/gas/mips/mips16-branch-addend-2.l: Remove file.
	* testsuite/gas/mips/mips16-branch-addend-3.l: Remove file.
	* testsuite/gas/mips/mips16-branch-absolute.l: Remove file.
	* testsuite/gas/mips/mips16-branch-addend-2.s: Add padding.
	* testsuite/gas/mips/branch-weak.s: Adjust alignment, avoid
	implicit instruction padding, avoid MIPS16 JR->JRC conversion.
	* testsuite/gas/mips/branch-weak-6.d: New test.
	* testsuite/gas/mips/branch-weak-7.d: New test.
	* testsuite/gas/mips/mips.exp: Run the new tests.

	ld/
	* testsuite/ld-mips-elf/mips16-branch-2.d: New test.
	* testsuite/ld-mips-elf/mips16-branch-3.d: New test.
	* testsuite/ld-mips-elf/mips16-branch-addend-2.d: New test.
	* testsuite/ld-mips-elf/mips16-branch-addend-3.d: New test.
	* testsuite/ld-mips-elf/mips16-branch.s: New test source.
	* testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.

Rust prefers to not specify the return type of a function when it is unit
(`()`). The type is also referred to as "void" in debuginfo but not in actual
usage, so we should never be printing "void" when the language is Rust.

2016-06-27  Manish Goregaokar  <manish@mozilla.com>

gdb/ChangeLog:
    * rust-lang.c (rust_print_type): Print unit types as "()"
    * rust-lang.c (rust_print_type): Omit return type for functions
    returning unit

gdb/testsuite/ChangeLog:
    * gdb.rust/simple.rs: Add test for returning unit in a function
    * gdb.rust/simple.exp: Add expectation for functions returning unit

	* config//tc-arc.c (tc_arc_frame_initial_instructions): Use
	cfi_add_CFA_def_cfa to generate default CFA with offset
	* testsuite/gas/cfi/cfi-arc-1.d: Update expected output.

	PR ld/20302
	* lexsup.c (set_segment_start): If resetting the start address of
	a section, remember to generate a new script element as well.
	* testsuite/ld-scripts/pr20302.d: New test.
	* testsuite/ld-scripts/scripts.exp: Run the new test.

Add command line option to stop the assembler from padding the end of sections to their alignment boundary.

	PR gas/20247
	* as.h (do_not_pad_sections_to_alignment): New global variable.
	* as.c (show_usage): Add --no-pad-sections.
	(parse_args): Likewise.
	* write.c (size_seg): Skip padding the end of the section if
	requested from the command line.
	(SUB_SEGMENT_ALIGN): Likewise.
	* doc/as.texinfo: Document the new option.
	* NEWS: Mention the new feature.
	* testsuite/gas/elf/section11.s: New test.
	* testsuite/gas/elf/section11.d: New test driver.
	* testsuite/gas/elf/elf.exp: Run the new test.

b3991020 fixed the testcase in this PR but it may be possible to
trigger the problem in other ways.

	PR ld/19264
	* elf64-ppc.c (STUB_SHRINK_ITER): Define.
	(ppc64_elf_size_stubs): Exit stub sizing loop past STUB_SHRINK_ITER
	if shrinking stubs.
	(ppc64_elf_size_stubs): Adjust to suit.

When a Python script tries to create a breakpoint but fails to do so,
gdb.Breakpoint.__init__ raises an exception and the breakpoint does not
exist anymore in the Python interpreter. However, GDB still keeps a
reference to the Python object to be used for a later hook, which is
wrong.

This commit adds the necessary cleanup code so that there is no stale
reference to this Python object. It also adds a new testcase to
reproduce the bug and check the fix.

2016-06-25  Pierre-Marie de Rodat  <derodat@adacore.com>

gdb/
	* python/py-breakpoint.c (bppy_init): Clear bppy_pending_object
	when there is an error during the breakpoint creation.

gdb/testsuite

	* gdb.python/py-breakpoint-create-fail.c,
	gdb.python/py-breakpoint-create-fail.exp,
	gdb.python/py-breakpoint-create-fail.py: New testcase.

bfd/ChangeLog:

2016-06-27  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* elf32-dlx.h: New file.
	* elf32-dlx.c: Adjust.

gas/ChangeLog:

2016-06-27  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-dlx.c: Include bfd/elf32-dlx.h.
	* config/tc-dlx.h: Remove prototype of dlx_set_skip_hi16.

gas/ChangeLog:

2016-06-27  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-xtensa.c (xtensa_elf_suffix): Use ARRAY_SIZE instead of a
	sentinal element.
	(map_suffix_reloc_to_operator): Likewise.
	(map_operator_to_reloc): Likewise.

gas/ChangeLog:

2016-06-27  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-nds32.c (md_begin): Use ARRAY_SIZE instead of a sentinal
	element in relax_table.

gas/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-aarch64.c: Make the type of reg_entry::type
	aarch_reg_type.

gas/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-bfin.c (bfin_cpus): Remove sentinal.
	(md_parse_option): Adjust.
	* config/tc-aarch64.c (aarch64_parse_abi): Replace use of a sentinal
	with iteration from 0 to ARRAY_SIZE.
	* config/tc-mcore.c (md_begin): Likewise.
	* config/tc-visium.c (visium_parse_arch): Likewise.

opcodes/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* mcore-opc.h: Remove sentinal.
	* mcore-dis.c (print_insn_mcore): Adjust.

its only called with an argument of 0, so we might as well remove the code
supporting other values.

gas/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-tic54x.c (tic54x_set_default_include): remove argument
							   and simplify accordingly.
	(tic54x_include): Adjust.
	(tic54x_mlib): Likewise.

There's no reason to have multiple prototypes for the same function.

include/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* elf/xtensa.h (xtensa_make_property_section): New prototype.

gas/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* config/tc-xtensa.c (xtensa_make_property_section): Remove prototype.

bfd/ChangeLog:

2016-06-25  Trevor Saunders  <tbsaunde+binutils@tbsaunde.org>

	* elf32-xtensa.c (xtensa_make_property_section): Remove prototype.

This fixes up a few formatting nits in rust-lang.c.
Built and regtested on x86-64 Fedora 23.

2016-06-25  Tom Tromey  <tom@tromey.com>

	* rust-lang.c (rust_get_disr_info, rust_print_type): Fix
	formatting.

gdb/testsuite/ChangeLog:
2016-06-25  Manish Goregaokar  <manish@mozilla.com>

    PR gdb/20239
    * gdb.rust/simple.rs: Add more tests for printing NonZero enums.
    * gdb.rust/simple.exp: Add test expectations for new NonZero tests.

gdb/ChangeLog:
2016-06-25  Manish Goregaokar  <manish@mozilla.com>

    PR gdb/20239
    * rust-lang.c (rust_get_disr_info): Correctly interpret
    NonZero-optimized enums of arbitrary depth.
    (rust_print_type): Correctly print NonZero-optimized
    enums.

GDB computes structure byte offsets using a 32 bit integer.  And,
first it computes the offset in bits and then converts to bytes.  The
result is that any offset that if 512K bytes or larger overflows.
This patch changes GDB to use LONGEST for such calculations.

	PR gdb/17520 Structure offset wrong when 1/4 GB or greater.
	* c-lang.h: Change all parameters, variables, and struct or union
	members used as struct or union fie3ld offsets from int to
	LONGEST.
	* c-valprint.c: Likewise.
	* cp-abi.c: Likewise.
	* cp-abi.h: Likewise.
	* cp-valprint.c: Likewise.
	* d-valprint.c: Likewise.
	* dwarf2loc.c: Likewise.
	* eval.c: Likewise.
	* extension-priv.h: Likewise.
	* extension.c: Likewise.
	* extension.h: Likewise.
	* findvar.c: Likewise.
	* gdbtypes.h: Likewise.
	* gnu-v2-abi.c: Likewise.
	* gnu-v3-abi.c: Likewise.
	* go-valprint.c: Likewise.
	* guile/guile-internal.h: Likewise.
	* guile/scm-pretty-print.c: Likewise.
	* jv-valprint.c Likewise.
	* opencl-lang.c: Likewise.
	* p-lang.h: Likewise.
	* python/py-prettyprint.c: Likewise.
	* python/python-internal.h: Likewise.
	* spu-tdep.c: Likewise.
	* typeprint.c: Likewise.
	* valarith.c: Likewise.
	* valops.c: Likewise.
	* valprint.c: Likewise.
	* valprint.h: Likewise.
	* value.c: Likewise.
	* value.h: Likewise.
	* p-valprint.c: Likewise.
	* c-typeprint.c (c_type_print_base): When printing offset, use
	plongest, not %d.
	* gdbtypes.c (recursive_dump_type): Ditto.

Correct a MIPS16 relocation handling regression in GAS introduced with:

commit 177b4a6a
Author: Alexandre Oliva <aoliva@redhat.com>
Date:   Mon Mar 18 18:56:18 2002 +0000

discussed at <https://sourceware.org/ml/binutils/2002-03/msg00345.html>,
which removed a preparatory call to `mips16_extended_frag' previously
made from `md_estimate_size_before_relax'.  As a result the function is
never called with its `sec' parameter non-NULL and consequently all the
unsupported relocation checks within are dead and never trigger, causing
any unhandled relocations to silently resolve to 0.  Unfortunately there
was no sufficient test suite coverage back then to catch this.

Remove all dead code then, and all the associated comments.  Update the
remaining call to `mips16_extended_frag' from `mips_relax_frag' to pass
the relocation section as the `sec' parameter and use it to mark frags
which require an external relocation, as extended.  Finally handle any
outstanding MIPS16 relocations in `md_convert_frag' and report an error
since we don't support any except with percent operators.

	gas/
	* config/tc-mips.c (append_insn): Use any `O_symbol' expression
	unchanged with relaxed MIPS16 instructions.
	(mips16_extended_frag): Adjust accordingly.  Return 1 right
	away if a relocation will be required for the symbol requested.
	Remove dead first relaxation pass code.
	(mips_relax_frag): Pass `sec' down to `mips16_extended_frag'.
	(md_convert_frag): Adjust symbol value calculation.  Raise an
	error if a relocation is required for the symbol requested.
	* testsuite/gas/mips/mips16@relax-swap3.d: Remove dump patterns,
	add error output.
	* testsuite/gas/mips/mips16@relax-swap3.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-relax-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-relax-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-relax-2.d: New test.
	* testsuite/gas/mips/mips16-pcrel-relax-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-2.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-4.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-5.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-6.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-7.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-0.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-1.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-2.d: New test.
	* testsuite/gas/mips/mips16-pcrel-addend-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-absolute.d: New test.
	* testsuite/gas/mips/mips16-branch-reloc-0.d: New test.
	* testsuite/gas/mips/mips16-branch-reloc-1.d: New test.
	* testsuite/gas/mips/mips16-branch-reloc-2.d: New test.
	* testsuite/gas/mips/mips16-branch-reloc-3.d: New test.
	* testsuite/gas/mips/mips16-branch-addend-0.d: New test.
	* testsuite/gas/mips/mips16-branch-addend-1.d: New test.
	* testsuite/gas/mips/mips16-branch-addend-2.d: New test.
	* testsuite/gas/mips/mips16-branch-addend-3.d: New test.
	* testsuite/gas/mips/mips16-branch-absolute.d: New test.
	* testsuite/gas/mips/mips16-absolute-reloc-0.d: New test.
	* testsuite/gas/mips/mips16-absolute-reloc-1.d: New test.
	* testsuite/gas/mips/mips16-absolute-reloc-2.d: New test.
	* testsuite/gas/mips/mips16-absolute-reloc-3.d: New test.
	* testsuite/gas/mips/mips16-pcrel-reloc-2.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-reloc-3.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-reloc-6.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-reloc-7.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-addend-2.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-addend-3.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-absolute.l: New error output.
	* testsuite/gas/mips/mips16-branch-reloc-2.l: New error output.
	* testsuite/gas/mips/mips16-branch-reloc-3.l: New error output.
	* testsuite/gas/mips/mips16-branch-addend-2.l: New error output.
	* testsuite/gas/mips/mips16-branch-addend-3.l: New error output.
	* testsuite/gas/mips/mips16-branch-absolute.l: New error output.
	* testsuite/gas/mips/mips16-absolute-reloc-2.l: New error output.
	* testsuite/gas/mips/mips16-absolute-reloc-3.l: New error output.
	* testsuite/gas/mips/mips16-pcrel-relax-0.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-relax-2.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-0.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-1.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-2.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-3.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-4.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-5.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-6.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-reloc-7.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-0.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-1.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-2.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-addend-3.s: New test source.
	* testsuite/gas/mips/mips16-pcrel-absolute.s: New test source.
	* testsuite/gas/mips/mips16-branch-reloc-0.s: New test source.
	* testsuite/gas/mips/mips16-branch-reloc-1.s: New test source.
	* testsuite/gas/mips/mips16-branch-reloc-2.s: New test source.
	* testsuite/gas/mips/mips16-branch-reloc-3.s: New test source.
	* testsuite/gas/mips/mips16-branch-addend-0.s: New test source.
	* testsuite/gas/mips/mips16-branch-addend-1.s: New test source.
	* testsuite/gas/mips/mips16-branch-addend-2.s: New test source.
	* testsuite/gas/mips/mips16-branch-addend-3.s: New test source.
	* testsuite/gas/mips/mips16-branch-absolute.s: New test source.
	* testsuite/gas/mips/mips16-absolute-reloc-0.s: New test source.
	* testsuite/gas/mips/mips16-absolute-reloc-1.s: New test source.
	* testsuite/gas/mips/mips16-absolute-reloc-2.s: New test source.
	* testsuite/gas/mips/mips16-absolute-reloc-3.s: New test source.
	* testsuite/gas/mips/mips.exp: Run the new tests.

All platforms on FreeBSD use a shared system call table, so use a
single XML file to describe the system calls available on each FreeBSD
platform.

Recent versions of FreeBSD include the identifier of the current
system call when reporting a system call entry or exit event in the
ptrace_lwpinfo structure obtained via PT_LWPINFO in fbsd_wait.  As
such, FreeBSD native targets do not use the gdbarch method to fetch
the system call code.  In addition, FreeBSD register sets fetched via
ptrace do not include an equivalent of 'orig_rax' (on amd64 for
example), so the system call code cannot be extracted from the
available registers during a system call exit.  However, GDB assumes
that system call catch points are not supported if the gdbarch method
is not present.  As a workaround, FreeBSD ABIs install a dummy gdbarch
method that throws an internal_error if it is ever invoked.

gdb/ChangeLog:

	* configure.ac: Check for support for system call LWP fields on
	FreeBSD.
	* config.in, configure: Rebuild.
	* data-directory/Makefile.in (SYSCALLS_FILES): Add freebsd.xml.
	* fbsd-nat.c (fbsd_wait) [HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE]:
	Report system call events.
	[HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE]
	(fbsd_set_syscall_catchpoint): New function.
	(fbsd_nat_add_target) [HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE]:
	Set "to_set_syscall_catchpoint" to "fbsd_set_syscall_catchpoint".
	* fbsd-tdep.c: Include xml-syscall.h
	(fbsd_get_syscall_number): New function.
	(fbsd_init_abi): Set XML system call file name.
	Add "get_syscall_number" gdbarch method.
	* syscalls/freebsd.xml: New file.

Add a 'print_auxv_entry' method for FreeBSD ABIs that parses
FreeBSD-specific auxiliary vector entries and outputs a suitable
description using fprint_auxv_entry.

gdb/ChangeLog:

	* fbsd-tdep.c: Include "auxv.h".
	(fbsd_print_auxv_entry): New function.
	(fbsd_init_abi): Install gdbarch "print_auxv_entry" method.

Different platforms have different meanings for auxiliary vector
entries.  The 'print_auxv_entry' gdbarch method allows an architecture
to output a suitable description for platform-specific entries.

A fprint_auxv_entry function is split out of fprint_target_auxv.
This function outputs the description of a single auxiliary vector
entry to the specified file using caller-supplied formatting and
strings to describe the vector type.

The existing switch on auxiliary vector types is moved out of
fprint_target_auxv into a new default_print_auxv_entry function.
default_print_auxv_entry chooses an appropriate format and description
and calls fprint_single_auxv to describe a single vector entry.
This function is used as the default 'print_auxv_entry' gdbarch method.

fprint_target_auxv now invokes the gdbarch 'print_auxv_entry' method
on each vector entry.

gdb/ChangeLog:

	* auxv.c (fprint_auxv_entry): New function.
	(default_print_auxv_entry): New function.
	(fprint_target_auxv): Use gdbarch_print_auxv_entry.
	* auxv.h (enum auxv_format): New enum.
	(fprint_auxv_entry): Declare.
	(default_print_auxv_entry): Declare.
	* gdbarch.sh (print_auxv_entry): New.
	* gdbarch.c, gdbarch.h: Re-generated.

The procstat AUXV core dump note in FreeBSD consists of 32-bit integer
followed by an array of auxiliary vector entries.

bfd/ChangeLog:

	* elf.c (elfcore_grok_freebsd_note): Handle NT_FREEBSD_PROCSTAT_AUXV
	notes.

Use the kern.proc.auxv.<pid> sysctl to fetch the ELF auxiliary vector for
a live process.

gdb/ChangeLog:

	* fbsd-nat.c [KERN_PROC_AUXV] New variable super_xfer_partial.
	(fbsd_xfer_partial): New function.
	(fbsd_nat_add_target) [KERN_PROC_AUXV] Set "to_xfer_partial" to
	"fbsd_xfer_partial".

Move parsing of FreeBSD-specific ELF core notes out of elfcore_grok_note
into a new elfcore_grok_freebsd_note function.  Add core note grok routines
for FreeBSD's psinfo and prstatus notes while here rather than depending
on the native handling in elfcore_grok_note.

bfd/ChangeLog:

	* elf.c (elfcore_grok_note): Remove handling of NT_X86_XSTATE for
	FreeBSD.  Remove case for NT_FREEBSD_THRMISC.
	(elfcore_grok_freebsd_psinfo): New function.
	(elfcore_grok_freebsd_prstatus): New function.
	(elfcore_grok_freebsd_note): New function.
	(elf_parse_notes): Use "elfcore_grok_freebsd_note" for "FreeBSD"
	notes.

include/ChangeLog:

	* elf/common.h (AT_FREEBSD_EXECPATH, AT_FREEBSD_CANARY)
	(AT_FREEBSD_CANARYLEN, AT_FREEBSD_OSRELDATE, AT_FREEBSD_NCPUS)
	(AT_FREEBSD_PAGESIZES, AT_FREEBSD_PAGESIZESLEN)
	(AT_FREEBSD_TIMEKEEP, AT_FREEBSD_STACKPROT): Define.

When configured with the default options, GDB currently fails to link,
due to an undefined reference to bfd_link_plugin_object_p, coming from
elflink.c:

    #ifdef BFD_SUPPORTS_PLUGINS
           || (abfd->plugin_format == bfd_plugin_unknown
              && bfd_link_plugin_object_p (abfd))
    #endif

This is because BFD_SUPPORTS_PLUGINS is always defined. It is its value
that determines whether plugin support is enabled or not.

bfd/ChangeLog:

        * elflink.c: Check the value of BFD_SUPPORTS_PLUGINS rather
        than its existance.

Some MIPS targets use a named section symbol rather than a symbol with
no name as is used with most ELF targets.  When renaming sections, the
named section symbol needs to be renamed too.

Rather than fix this bug, I'd originally intended to just correct the
xfail added recently for update-1.o vs update4.o in update-section.exp,
using the same set of targets for the localize-hidden-1 mips xfail.
I'd extracted that target test into a new function, is_bad_symtab.  It
turns out to be useful in readelf.exp too.

bfd/
	* config.bfd: Delete mips vxworks patterns matched earlier.
	Combine mips*-*-none with mips*-*-elf*.
binutils/
	* objcopy.c (find_section_rename): Forward declare.  Remove
	ibfd and sec_ptr param.  Add old_name param.  Allow for NULL
	returned_flags.  Move read of section name and flags to..
	(setup_section): ..here.  Update find_section_rename call.
	(filter_symbols): Rename section symbols for renamed sections.
	(copy_object): Call filter_symbols when renamed sections.
	* testsuite/lib/binutils-common.exp (is_bad_symtab): New.
	* testsuite/binutils-all/update-section.exp: Revert 96037eb0
	mips xfail.
	* testsuite/binutils-all/objcopy.exp (copy_executable): Use
	is_bad_symtab.
	(localize-hidden-1): xfail if is_bad_symtab.
	* testsuite/binutils-all/readelf.exp: Use is_bad_symtab to select
	between mips/tmips.

Fixes failure on aarch64-rtems.

	* testsuite/ld-aarch64/aarch64-elf.exp (aarch64_choose_ilp32_emul):
	Don't error out, always return an emulation.

This target doesn't build, due to a missing gas/config/te-obsd.h file.
It's been that way since the commit switching to elf, in 2002.
https://lists.gnu.org/archive/html/bug-gnu-utils/2002-07/msg00128.html

	* configure.tgt (alpha-*-openbsd*): Use em=nbsd.

Showing context lines is confusing in many cases, an obvious example
being loops.

	* objdump.c (struct print_file_list): Add "max_printed".
	(try_print_file_open): Init new field.
	(show_line): Don't show 5 context lines when redisplaying source.