Make assignments to dot keep an empty output section.

An assignment to dot in an output section that allocates space of
course keeps the output section.  Here, I'm changing the behaviour for
assignments that don't allocate space.  The idea is not so much to
allow people to force output of an empty section with ". = .", but
to fix cases where an otherwise empty section has padding added by an
alignment expression that changes with relaxation or .eh_frame
editing.  Such a section might have zero size before relaxation and so
be stripped incorrectly.

ld/
	* ld.texinfo (Output Section Discarding): Mention assigning to dot
	as a way of keeping otherwise empty sections.
	* ldexp.c (is_dot, is_value, is_sym_value, is_dot_ne_0,
	is_dot_plus_0, is_align_conditional): New predicates.
	(exp_fold_tree_1): Set SEC_KEEP when assigning to dot inside an
	output section, except for some special cases.
	* scripttempl/elfmicroblaze.sc: Use canonical form to align at
	end of .heap and .stack.
ld/testsuite/
	* ld-shared/elf-offset.ld: Align end of .bss with canonical form
	of ALIGN that allows an empty .bss to be removed.
	* ld-arm/arm-dyn.ld: Likewise.
	* ld-arm/arm-lib.ld: Likewise.
	* ld-elfvsb/elf-offset.ld: Likewise.
	* ld-mips-elf/mips-dyn.ld: Likewise.
	* ld-mips-elf/mips-lib.ld: Likewise.
	* ld-arm/arm-no-rel-plt.ld: Remove duplicate ALIGN.
	* ld-powerpc/vle-multiseg-1.ld: Remove ALIGN at start of section.
	ALIGN address of section instead.
	* ld-powerpc/vle-multiseg-2.ld: Likewise.
	* ld-powerpc/vle-multiseg-3.ld: Likewise.
	* ld-powerpc/vle-multiseg-4.ld: Likewise.
	* ld-powerpc/vle-multiseg-6.ld: Likewise.
	* ld-scripts/empty-aligned.d: Check section headers not program
	headers.  Remove xfail and notarget.
	* ld-scripts/empty-aligned.t: Use canonical ALIGN for end of .text2.
Miscellaneous ld tidies

Localise a struct, prevent an unneeded symbol lookup, and fix a
testcase.

ld/
	* ld.h (struct map_symbol_def): Move to..
	* ldlang.h: ..here.
	* ldlang.c (print_assignment): Don't set expld.assign_name to dot.
ld/testsuite/
	* ld-scripts/pr14962-2.d: Correct target triple.
Expand documentation of common-utils.h::FUNCTION_NAME

While looking at this macro, I noticed that it wasn't always necessarily
defined. That prompted me to search the current sources to make sure
that all uses were adequately protected, which they were. But to help
prevent future uses to be made unprotected, this patch expands the
current macro documentation a bit.

gdb/ChangeLog:

        * common/common-utils.h (FUNCTION_NAME): Expand the macro's
        documentation a bit.
Add ARI (ok) marker for __func__ reference in common-utils.h

The ARI script flagged the use of the __func__ variable, which
is normally not allowed (not defined in C90). However, this particular
use is OK, as the reference is only made when __STDC_VERSION__ >=
199901L.  So, add an "ARI:" comment to explicitly OK this use.

gdb/ChangeLog:

        * common/common-utils.h: Add "ARI:" comment beside __func__
        reference.
Comment typo

	* elf64-ppc.c (STK_LINKER): Comment typo fix.
Fix gas build breakage

	* config/tc-tic4x.c (md_shortopts): s/CONST/const/.
Display the reference causing a shared library to be needed

Adds a section for --as-needed libraries to a linker map file, similar
to what we do for archive libraries.

bfd/
	* elflink.c (elf_link_add_object_symbols): Call minfo for --as-needed.
ld/
	* ldlang.c (asneeded_list_head, asneeded_list_tail): New vars.
	(lang_init): Initialise them.
	(lang_print_asneeded): New function.
	(lang_process): Call lang_print_asneeded.
	* ldlang.h (struct asneeded_minfo): New.
	(asneeded_list_tail): Declare.
	* ldmain.c (add_archive_element): Improve archive map heading.
	* ldmisc.c (minfo): Stash --as-needed info.
xtensa-config.c: missing defs.h include.

All .c files must start by including defs.h.

2014-01-22  Pedro Alves  <palves@redhat.com>

	* xtensa-config.c: Include defs.h.
gdb: xtensa: fix on 64-bit hosts

On 64-bit hosts unsigned long is 64 bit.  Use uint32_t instead.

gdb/
2014-01-22  Baruch Siach  <baruch@tkos.co.il>

	* xtensa-tdep.h (xtensa_elf_greg_t): Change type to uint32_t.
Prevent appending "-g" after "-g3" to compile options in info-macros.exp.

When upstream gcc is given a command line with the "-g" option after
"-g3", it doesn't generate a ".debug_macro" section.  This is because
the last option wins, thus downgrading the debug level again.  Without
any macro debug information in the executable, info-macros.exp
obviously produces many failures.

Since the "-g" option is appended by DejaGnu's target_compile whenever
the "debug" option is set, the fix just removes that option.

gdb/testsuite/ChangeLog:
	* gdb.base/info-macros.exp: Remove "debug" from the compile
	options.
Re-introduce '_start' labels and add alignment in dw2-dir-file-name test case.

On ppc64-linux a function symbol does not point to code, but to the
function descriptor.  Thus the previous change for this test case
broke it:

      https://sourceware.org/ml/gdb-patches/2014-01/msg00275.html

This patch reverts to the original method, re-introducing '_start'
symbols.  In addition, it adds sufficient alignment before the label,
such that the label never points into an alignment gap.

gdb/testsuite/ChangeLog:
	* gdb.dwarf2/dw2-dir-file-name.c (FUNC): Insert alignment and
	define "*_start" label.  Make "name" static.
	* gdb.dwarf2/dw2-dir-file-name.exp: Replace references to
	${name} by references to ${name}_start.
Fix regression on s390x with entry-values.exp.

The trace-specific test case 'entry-values' concludes fairly late in
the process that this platform doesn't support trace.  Before that,
there are some platform specifics that don't work on s390x.  The fix
addresses two aspects:

(1) Removal of an excess space character in the regex for the
    disassembly.  This is needed when there is a function alignment
    gap, because then the hex address is immediately followed by a
    colon, like in the first 'nopr' line below:

    (gdb) disassemble foo+50,+10
    Dump of assembler code from 0x32 to 0x3c:
       0x0000000000000032 <foo+50>: br      %r4
       0x0000000000000034:  nopr    %r7
       0x0000000000000036:  nopr    %r7
       0x0000000000000038 <bar+0>:  stmg    %r11,%r15,88(%r15)
    End of assembler dump.

(2) Handling for the s390-specific call instruction.

gdb/testsuite/ChangeLog:
	* gdb.trace/entry-values.exp: Remove excess space character from
	regex patterns.  Handle s390 call instruction.
gdb/ChangeLog:
	* syscalls/s390x-linux.xml: New file.
	* syscalls/s390-linux.xml: New file.
	* s390-linux-tdep.c (XML_SYSCALL_FILENAME_S390): New macro.
	(XML_SYSCALL_FILENAME_S390X): Likewise.
	(op_svc): New enum value for SVC opcode.
	(s390_sigtramp_frame_sniffer): Replace literal by 'op_svc'.
	(s390_linux_get_syscall_number): New function.
	(s390_gdbarch_init): Register '*get_syscall_number' and the
	syscall xml file name.
	* data-directory/Makefile.in (SYSCALLS_FILES): Add
	"s390-linux.xml" and "s390x-linux.xml".
	* NEWS: Announce new feature.

gdb/testsuite/ChangeLog:
	* gdb.base/catch-syscall.exp: Activate test on s390*-linux.
Add check for invalid register in AVX512 gathers

AVX512 gather instructions shouldn't accept the same register for both
destination and index.

gas/

2014-01-22  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>

	PR gas/16489
	* config/tc-i386.c (check_VecOperands): Add check for invalid
	register set in AVX512 gathers.

gas/testsuite/

2014-01-22  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>

	PR gas/16489
	* gas/i386/vgather-check.s: Add tests for AVX512 gathers.
	* gas/i386/x86-64-vgather-check.s: Likewise.
	* gas/i386/vgather-check-error.l: Update correspondingly.
	* gas/i386/vgather-check-none.d: Likewise.
	* gas/i386/vgather-check-warn.d: Likewise.
	* gas/i386/vgather-check-warn.e: Likewise.
	* gas/i386/vgather-check.d: Likewise.
	* gas/i386/x86-64-vgather-check-error.l: Likewise.
	* gas/i386/x86-64-vgather-check-none.d: Likewise.
	* gas/i386/x86-64-vgather-check-warn.d: Likewise.
	* gas/i386/x86-64-vgather-check-warn.e: Likewise.
	* gas/i386/x86-64-vgather-check.d: Likewise.
Remove regzmm from AVX2 gather assert

Since regzmm can't be used in AVX2 gather instructions, there is no need
to check regzmm in AVX2 gather assert.

2014-01-22  Michael Zolotukhin  <michael.v.zolotukhin@gmail.com>

	* config/tc-i386.c (check_VecOperands): Remove regzmm from AVX2
	gather assert.
Add .refsym to msp430 backend

* config/tc-msp430.c (msp430_refsym): New: ".refsym <symbol>"
* doc/c-msp430.texi (MSP430 Directives): Document it.

The purpose of this patch is to provide a way for one object file
to require the inclusion of another object, without having to
allocate space for a .word address reference.
	New gdbserver option --debug-format=timestamp.
	* NEWS: Mention it.

	gdbserver/
	* configure.ac (AC_CHECK_FUNCS): Add test for gettimeofday.
	* configure: Regenerate.
	* config.in: Regenerate.
	* Makefile.in (SFILES): Add debug.c.
	(OBS): Add debug.o.
	* debug.c: New file.
	* debug.h: New file.
	* linux-aarch64-low.c (*): Update all debugging printfs to use
	debug_printf instead of fprintf.
	* linux-arm-low.c (*): Ditto.
	* linux-cris-low.c (*): Ditto.
	* linux-crisv32-low.c (*): Ditto.
	* linux-m32r-low.c (*): Ditto.
	* linux-sparc-low.c (*): Ditto.
	* linux-x86.c (*): Ditto.
	* linux-low.c (*): Ditto.
	(linux_wait_1): Add calls to debug_enter, debug_exit.
	(linux_wait): Remove redundant debugging printf.
	(stop_all_lwps): Add calls to debug_enter, debug_exit.
	(linux_resume, unstop_all_lwps): Ditto.
	* mem-break.c (*): Update all debugging printfs to use
	debug_printf instead of fprintf.
	* remote-utils.c (*): Ditto.
	* thread-db.c (*): Ditto.
	* server.c #include <ctype.h>, "gdb_vecs.h".
	(debug_threads): Moved to debug.c.
	(*): Update all debugging printfs to use debug_printf instead of
	fprintf.
	(start_inferior): Replace call to fflush with call to debug_flush.
	(monitor_show_help): Mention set debug-format.
	(parse_debug_format_options): New function.
	(handle_monitor_command): Handle "monitor set debug-format".
	(gdbserver_usage): Mention --debug-format.
	(main): Parse --debug-format.
	* server.h (debug_threads): Declaration moved to debug.h.
	#include "debug.h".
	* tracepoint.c (trace_debug_1) [!IN_PROCESS_AGENT]: Add version of
	trace_debug_1 that uses debug_printf.
	(tracepoint_look_up_symbols): Update all debugging printfs to use
	debug_printf instead of fprintf.

	doc/
	* gdb.texinfo (Server): Mention --debug-format=all|none|timestamp.
	(gdbserver man): Ditto.

	testsuite/
	* gdb.server/server-mon.exp: Add tests for "set debug-format".
daily update
	* gdbthread.h (gdb_id_to_thread): Delete, unused.