Add a testcase for PR ld/2404

PR ld/2404 was fixed without a testcase.  This patch to add one.

PR ld/2404
* ld-elf/pr2404.out: New file.
* ld-elf/pr2404a.c: Likewise.
* ld-elf/pr2404b.c: Likewise.

* ld-elf/shared.exp (build_tests): Build libpr2404a.so and
libpr2404b.a.
(run_tests): Run pr2404.

gdb: xtensa: fix linux ptrace includes

Currently, xtensa code using the Linux ptrace interface only include
sys/ptrace.h.  This file comes from the C library (glibc and uClibc,
at least), and includes a declaration of the ptrace() functions, along
with some cross architecture constants that are mostly copied from the
file located at include/uapi/linux/ptrace.h in recent Linux kernels.

For xtensa specific constants like PTRACE_GETXTREGS and
PTRACE_SETXTREGS the asm/ptrace.h include from the Linux kernel UAPI
is needed.  The code in gdbserver xtensa specific part doesn't call
ptrace() directly, so we can remove the unneeded sys/ptrace.h include.
The gdb xtensa specific code needs both headers, since it calls
ptrace().

gdb/
* xtensa-linux-nat.c: Include asm/ptrace.h.

gdb/gdbserver/
* linux-xtensa-low.c: Include asm/ptrace.h instead of
sys/ptrace.h.

Allow self-assignment for absolute symbols defined in a linker script

Modifies ld machinery tracking linker script assignments to notice all
assignments, not just those symbols mentioned in DEFINED().

ld/
PR ld/14962
* ldlang.h (struct lang_definedness_hash_entry): Add by_object and
by_script.  Make iteration a single bit field.
(lang_track_definedness, lang_symbol_definition_iteration): Delete.
(lang_symbol_defined): Declare.
* ldlang.c (lang_statement_iteration): Expand comment a little.
(lang_init <lang_definedness_table>): Make it bigger.
(lang_track_definedness, lang_symbol_definition): Delete.
(lang_definedness_newfunc): Update.
(lang_symbol_defined): New function.
(lang_update_definedness): Create entries here.  Do track whether
script definition of symbol is valid, even when also defined in
an object file.
* ldexp.c (fold_name <DEFINED>): Update.
(fold_name <NAME>): Allow self-assignment for absolute symbols
defined in a linker script.
ld/testsuite/
* ld-scripts/pr14962-2.d,
* ld-scripts/pr14962-2.t: New test.
* ld-scripts/expr.exp: Run it.

Fix duplicate output section statement lookup

Tie output section statements to their associated output section via
output section userdata.  This allows us to avoid hash lookups which
are slower and fail when multiple output sections have the same name.

* ldlang.h (lang_output_section_get): Define.
* ldlang.c (lang_output_section_get): Likewise.
(init_os): Set the output_section userdata to the output
section statement.
* emultempl/hppaelf.em: Use lang_output_section_get instead of
lang_output_section_find where applicable.
* emultempl/aarch64elf.em: Likewise.
* emultempl/aix.em: Likewise.
* emultempl/armelf.em: Likewise.
* emultempl/m68hc1xelf.em: Likewise.
* emultempl/metagelf.em: Likewise.
* emultempl/mipself.em: Likewise.
* emultempl/ppc64elf.em: Likewise.
* emultempl/spuelf.em: Likewise.

daily update

Move D demangling routines out of d-lang.c and into d-support.c, which
is intended to house other D language support functions.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * Makefile.in (SFILES): Add d-support.c.
    (COMMON_OBS): Add d-support.o.
    * d-lang.h (d_parse_symbol): Add comment, now defined in
    d-support.c.
    * d-lang.c (parse_call_convention)
    (parse_attributes, parse_function_types)
    (parse_function_args, parse_type, parse_identifier)
    (call_convention_p, d_parse_symbol): Move functions to ...
    * d-support.c: ... New file.

Fix and update D demangling support in gdb to the current mangling ABI.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * d-lang.h (d_parse_symbol): Add declaration.
    * d-lang.c (extract_identifiers)
    (extract_type_info): Remove functions.
    (parse_call_convention, parse_attributes)
    (parse_function_types, parse_function_args)
    (parse_type, parse_identifier, call_convention_p)
    (d_parse_symbol): New functions.
    (d_demangle): Use d_parse_symbol to demangle D symbols.

gdb/testsuite/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

* gdb.dlang/demangle.exp: New file.

Define all basic data types of D and add them to the primitive type
language vector.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * d-lang.h (struct builtin_d_type): New data type.
    (builtin_d_type): Add declaration.
    * d-lang.c (d_language_arch_info, build_d_types)
    (builtin_d_type): New functions.
    (enum d_primitive_types): New data type.
    (d_language_defn): Change c_language_arch_info to
    d_language_arch_info.
    (d_type_data): New static variable.
    (_initialize_d_language): Initialize d_type_data.

gdb/testsuite/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * gdb.dlang/primitive-types.exp: New file.

Add d_main_name to set the logical entry point for D programs.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * d-lang.h (d_main_name): Add declaration.
    * d-lang.c (d_main_name): New function.
    * symtab.c (find_main_name): Add call to d_main_name.

Update d_language_defn to reflect that D does not have any style of
macro expansion in its language.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * d-lang.c (d_language_defn): Change macro_expansion_c to
    macro_expansion_no.

Add gdb.dlang to the gdb testsuite for the purpose of creating D
specific tests.

gdb/testsuite/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * configure.ac: Create gdb.dlang/Makefile.
    * configure: Regenerate.
    * Makefile.in (ALL_SUBDIRS): Add gdb.dlang.
    * gdb.dlang/Makefile.in: New file.
    * lib/d-support.exp: New file.
    * lib/gdb.exp (skip_d_tests): New proc.

Add myself as a write-after-approval gdb maintainer.

gdb/ChangeLog:
2014-01-17  Iain Buclaw  <ibuclaw@gdcproject.org>

    * MAINTAINERS: Add myself as a write-after-approval maintainer.

daily update

Add "volatile" keyword to "struct gdb_exception" declaration

While doing something else, I found that those 2 places were incorrectly
declaring a "struct gdb_exception" without using the "volatile" keyword.
This commit fixes that.

2014-01-17  Sergio Durigan Junior  <sergiodj@redhat.com>

* breakpoint.c (insert_bp_location): Add "volatile" keyword to "struct
gdb_exception" declaration.
* remote.c (getpkt_or_notif_sane): Likewise.

Add delim_string_to_char_ptr_vec.

* common/gdb_vecs.c (delim_string_to_char_ptr_vec_append): New
function, contents of dirnames_to_char_ptr_vec_append moved here.
(delim_string_to_char_ptr_vec): New function.
(dirnames_to_char_ptr_vec_append): Rewrite.
* common/gdb_vecs.h (delim_string_to_char_ptr_vec): Declare.

Move ASSERT_FUNCTION to FUNCTION_NAME.

* common/common-utils.h (FUNCTION_NAME): Renamed from ASSERT_FUNCTION,
and moved here ...
* common/gdb_assert.h (ASSERT_FUNCTION): ... from here.
#include "common-utils.h".
(gdb_assert, gdb_assert_fail, gdb_assert_not_reached): Update.
* common/vec.h (VEC_ASSERT_PASS): Update.
* darwin-nat.h: Replace #include of gdb_assert.h with common-utils.h.
(MACH_CHECK_ERROR): Update.

Fix PR mention in gdb/gdbserver/ChangeLog's previous change.

gas: ARM: Fix encoding of VCVTr.s32.f64 instructions

The direct rounding floating-point VCVT instructions introduced in
ARMv8 encode the s32.f64 variant incorrectly. The op bit should be
set to 1 for all signed conversions.

gas/ChangeLog:

2014-01-17  Will Newton  <will.newton@linaro.org>

* config/tc-arm.c (do_vfp_nsyn_cvt_fpv8): Set OP to 1
for the s32.f64 flavours of VCVT.

gas/testsuite/ChangeLog:

2014-01-17  Will Newton  <will.newton@linaro.org>

* gas/arm/armv8-a+fp.d: Correct encoding of vcvta.s32.f64.

Fix silly ChangeLog entry in previous change.

Fix PR PR16445 - gdbserver build failure on x86.

If gdb_proc_service.h ends up including linux/elf.h, we'll trip on
duplicate definitions:

 In file included from ../../../gdb/gdbserver/linux-x86-low.c:29:0:
 ../../../gdb/gdbserver/../../include/elf/common.h:36:0: error: "ELFMAG0"
                 redefined [-Werror]
 ... etc ...

Handle this the same way linux-low.c and linux-arm-low.c handle this.

gdb/gdbserver/
2014-01-17  Pedro Alves  <palves@redhat.com>

PR PR16445
* linux-x86-low.c (linux-x86-low.c): Don't include elf/common.h if
ELFMAG0 is defined after including gdb_proc_service.h.

Add comments to gdbarch_address_class_name_to_type_flags.

gdb/ChangeLog
2014-01-17  Simon Marchi  <simon.marchi@ericsson.com>

* gdbarch.sh (gdbarch_address_class_name_to_type_flags): Add
comments.
* gdbarch.h: Regenerate.

Allow ld target customiser script to force on disk scripts.

Mucking with EMULATION_LIBPATH has unwanted side effects.  Allow nds32
emulparams scripts to disable compiled-in scripts naturally, by
setting COMPILE_IN=no.

* genscripts.sh (COMPILE_IN): Don't set if already set.
* emulparams/nds32elf.sh: Don't clear EMULATION_LIBPATH, set
COMPILE_IN=no.
* emulparams/nds32elf16m.sh: Likewise.
* emulparams/nds32elf_linux.sh: Likewise.
* emultempl/aix.em: Test COMPILE_IN value is "yes".
* emultempl/armcoff.em: Likewise.
* emultempl/elf32.em: Likewise.
* emultempl/generic.em: Likewise.
* emultempl/gld960.em: Likewise.
* emultempl/gld960c.em: Likewise.
* emultempl/linux.em: Likewise.
* emultempl/lnk960.em: Likewise.
* emultempl/m68kcoff.em: Likewise.
* emultempl/sunos.em: Likewise.
* emultempl/ticoff.em: Likewise.

* dll.c (UNSPECIFIED_CORE_ADDR): New macro.
(match_dll): Use it.

daily update

rearrange struct value to save memory

This patch rearranges struct value a tiny bit, moving the "regnum"
field into a hole.  This saves 8 bytes per value on a 64-bit machine,
and 4 bytes per value on a 32 bit machine.  I think it does not
negatively affect readability or performance.

Built and regtested on x86-64 Fedora 18.

2014-01-16  Tom Tromey  <tromey@redhat.com>

* value.c (struct value) <regnum>: Move earlier.

remove extended_remote_create_inferior_1

I noticed that extended_remote_create_inferior_1 is called from a
single spot.  This patch unifies the callee and caller.  It's just a
simple cleanup that made the coming refactoring simpler.

2014-01-16  Tom Tromey  <tromey@redhat.com>

* remote.c (extended_remote_create_inferior): Rename from
extended_remote_create_inferior_1.  Add "ops" argument.  Remove
old implementation.

Fix gdb.trace/mi-traceframe-changed.exp on s390.

The test fails on s390 with:

  -trace-find frame-number 0^M
  &"PC not available\n"^M
  ^done,found="1",tracepoint="1",traceframe="0",frame={level="-1",addr="<unavailable>",func="??",args=[]}^M
  (gdb) ^M
  FAIL: gdb.trace/mi-traceframe-changed.exp: tfile: -trace-find frame-number 0

tfile knows to infer the PC from the tracepoint's address if the PC
wasn't collected (tfile_fetch_registers) but, that only works on
targets whose PC register is a raw register, and on s390, the PC
register is a pseudo register.

But even if GDB doesn't know how to infer the value of PC, saying the
current frame is level -1 is a bug:

  ^done,found="1",tracepoint="1",traceframe="0",frame={level="-1",addr="<unavailable>",func="??",args=[]}^M
                                                       ^^^^^^^^^

'-1' is the level of the sentinel frame, which should never be visible.

This is caused by the s390's heuristic unwinder accepting the frame
(the fallback heuristic unwinders _always_ accept the frame), but then
the unwind->this_id method throws that "PC not available\n" error.

IOW, the s390's heuristic unwinder was never adjusted to handle
unavailable register values gracefully, which can happen with e.g., a
trimmed core file too.

This is just the minimal necessary for
<unavailable> frames, which at least gets us:

  (gdb) tfind
  Found trace frame 0, tracepoint 1
  #0  <unavailable> in ?? ()

That is, frame #0 instead of -1.

We could get better info out of "info frame" (this patch makes us show
"outermost"), but this change would still be necessary.

gdb/
2014-01-16  Pedro Alves  <palves@redhat.com>

* s390-linux-tdep.c (s390_frame_unwind_cache): Swallow
NOT_AVAILABLE_ERROR errors while parsing the prologue or reading
the backchain.

dwarf2read.c (open_and_init_dwp_file): Fix typo in comment.

record-btrace: add (reverse-)stepping support

Provide to_resume and to_wait target methods for the btrace record target
to allow reverse stepping and replay support.

Replay is limited in the sense that only stepping and source correlation
are supported.  We do not record data and thus can not show variables.

Non-stop mode is not working.  Do not allow record-btrace in non-stop mode.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* btrace.h (btrace_thread_flag): New.
(struct btrace_thread_info) <flags>: New.
* record-btrace.c (record_btrace_resume_thread)
(record_btrace_find_thread_to_move, btrace_step_no_history)
(btrace_step_stopped, record_btrace_start_replaying)
(record_btrace_step_thread, record_btrace_decr_pc_after_break)
(record_btrace_find_resume_thread): New.
(record_btrace_resume, record_btrace_wait): Extend.
(record_btrace_can_execute_reverse): New.
(record_btrace_open): Fail in non-stop mode.
(record_btrace_set_replay): Split into this, ...
(record_btrace_stop_replaying): ... this, ...
(record_btrace_clear_histories): ... and this.
(init_record_btrace_ops): Init to_can_execute_reverse.
* NEWS: Announce it.

testsuite/
* gdb.btrace/delta.exp: Check reverse stepi.
* gdb.btrace/tailcall.exp: Update.  Add stepping tests.
* gdb.btrace/finish.exp: New.
* gdb.btrace/next.exp: New.
* gdb.btrace/nexti.exp: New.
* gdb.btrace/record_goto.c: Add comments.
* gdb.btrace/step.exp: New.
* gdb.btrace/stepi.exp: New.
* gdb.btrace/multi-thread-step.c: New.
* gdb.btrace/multi-thread-step.exp: New.
* gdb.btrace/rn-dl-bind.c: New.
* gdb.btrace/rn-dl-bind.exp: New.
* gdb.btrace/data.c: New.
* gdb.btrace/data.exp: New.
* gdb.btrace/Makefile.in (EXECUTABLES): Add new.

doc/
* gdb.texinfo: Document limited reverse/replay support
for target record-btrace.

target: allow decr_pc_after_break to be defined by the target

Allow the target to define which value to use in decr_pc_after_break.
It defaults to gdbarch_decr_pc_after_break (GDBARCH).

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* target.h (struct target_ops) <to_decr_pc_after_break>: New.
(forward_target_decr_pc_after_break)
(target_decr_pc_after_break): New.
* target.c (forward_target_decr_pc_after_break)
(target_decr_pc_after_break): New.
* aix-thread.c (aix_thread_wait): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.
* darwin-nat.c (cancel_breakpoint): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.
* infrun.c (adjust_pc_after_break): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.
* linux-nat.c (cancel_breakpoint): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.
* linux-thread-db.c (check_event): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.
* record-full.c (record_full_wait_1): Call target_decr_pc_after_break
instead of gdbarch_decr_pc_after_break.

record-btrace: show trace from enable location

The btrace record target shows the branch trace from the location of the first
branch destination.  This is the first BTS records.

After adding incremental updates, we can now add a dummy record for the current
PC when we enable tracing so we show the trace from the location where branch
tracing has been enabled.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* btrace.c: Include regcache.h.
(btrace_add_pc): New.
(btrace_enable): Call btrace_add_pc.
(btrace_is_empty): New.
* btrace.h (btrace_is_empty): New.
* record-btrace.c (require_btrace, record_btrace_info): Call
btrace_is_empty.

testsuite/
* gdb.btrace/Makefile.in (EXECUTABLES): Add delta.
* gdb.btrace/exception.exp: Update.
* gdb.btrace/instruction_history.exp: Update.
* gdb.btrace/record_goto.exp: Update.
* gdb.btrace/tailcall.exp: Update.
* gdb.btrace/unknown_functions.exp: Update.
* gdb.btrace/delta.exp: New.

btrace, gdbserver: read branch trace incrementally

Read branch trace data incrementally and extend the current trace rather than
discarding it and reading the entire trace buffer each time.

If the branch trace buffer overflowed, we can't extend the current trace so we
discard it and start anew by reading the entire branch trace buffer.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* common/linux-btrace.c (perf_event_read_bts, linux_read_btrace):
Support delta reads.
(linux_disable_btrace): Change return type.
* common/linux-btrace.h (linux_read_btrace): Change parameters
and return type to allow error reporting.  Update users.
(linux_disable_btrace): Change return type.  Update users.
* common/btrace-common.h (btrace_read_type) <BTRACE_READ_DELTA>:
New.
(btrace_error): New.
(btrace_block) <begin>: Comment on BEGIN == 0.
* btrace.c (btrace_compute_ftrace): Start from the end of
the current trace.
(btrace_stitch_trace, btrace_clear_history): New.
(btrace_fetch): Read delta trace, return if replaying.
(btrace_clear): Move clear history code to btrace_clear_history.
(parse_xml_btrace): Throw an error if parsing failed.
* target.h (struct target_ops) <to_read_btrace>: Change parameters
and return type to allow error reporting.
(target_read_btrace): Change parameters and return type to allow
error reporting.
* target.c (target_read_btrace): Update.
* remote.c (remote_read_btrace): Support delta reads.  Pass
errors on.
* NEWS: Announce it.

gdbserver/
* target.h (target_ops) <read_btrace>: Change parameters and
return type to allow error reporting.
* server.c (handle_qxfer_btrace): Support delta reads.  Pass
trace reading errors on.
* linux-low.c (linux_low_read_btrace): Pass trace reading
errors on.
(linux_low_disable_btrace): New.

record-btrace: extend unwinder

Extend the always failing unwinder to provide the PC based on the call
structure detected in the branch trace.

The unwinder supports normal frames and tailcall frames.
Inline frames are not supported.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record.h (record_btrace_frame_unwind)
(record_btrace_tailcall_frame_unwind): New declarations.
* dwarf2-frame: Include record.h
(dwarf2_frame_cfa): Throw an error for btrace frames.
* record-btrace.c: Include hashtab.h.
(btrace_get_bfun_name): New.
(btrace_call_history): Call btrace_get_bfun_name.
(struct btrace_frame_cache): New.
(bfcache): New.
(bfcache_hash, bfcache_eq, bfcache_new): New.
(btrace_get_frame_function): New.
(record_btrace_frame_unwind_stop_reason): Allow unwinding.
(record_btrace_frame_this_id): Compute own id.
(record_btrace_frame_prev_register): Provide PC, throw_error
for all other registers.
(record_btrace_frame_sniffer): Detect btrace frames.
(record_btrace_tailcall_frame_sniffer): New.
(record_btrace_frame_dealloc_cache): New.
(record_btrace_frame_unwind): Add new functions.
(record_btrace_tailcall_frame_unwind): New.
(_initialize_record_btrace): Allocate cache.
* btrace.c (btrace_clear): Call reinit_frame_cache.
* NEWS: Announce it.

testsuite/
* gdb.btrace/record_goto.exp: Add backtrace test.
* gdb.btrace/tailcall.exp: Add backtrace test.

record-btrace: add record goto target methods

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_set_replay)
(record_btrace_goto_begin, record_btrace_goto_end)
(record_btrace_goto): New.
(init_record_btrace_ops): Initialize them.
* NEWS: Announce it.

testsuite/
* gdb.btrace/Makefile.in (EXECUTABLES): Add record_goto.
* gdb.btrace/record_goto.c: New.
* gdb.btrace/record_goto.exp: New.
* gdb.btrace/x86-record_goto.S: New.

record-btrace: provide target_find_new_threads method

The "info threads" command tries to read memory, which is not possible during
replay.  This results in an error message and aborts the command without showing
the existing threads.

Provide a to_find_new_threads target method to skip the search while replaying.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_find_new_threads)
(record_btrace_thread_alive): New.
(init_record_btrace_ops): Initialize to_find_new_threads and
to_thread_alive.

record-btrace: add to_wait and to_resume target methods.

Add simple to_wait and to_resume target methods that prevent stepping when the
current replay position is not at the end of the execution log.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_resume): New.
(record_btrace_wait): New.
(init_record_btrace_ops): Initialize to_wait and to_resume.

record-btrace: provide xfer_partial target method

Provide the xfer_partial target method for the btrace record target.

Only allow memory read accesses to readonly memory while we're replaying,
except for inserting and removing breakpoints.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_xfer_partial)
(record_btrace_insert_breakpoint, record_btrace_remove_breakpoint)
(record_btrace_allow_memory_access): New.
(init_record_btrace_ops): Initialize new methods.
* target.c (raw_memory_xfer_partial): Bail out if target reports
that this memory is not available.

target, breakpoint: allow insert/remove breakpoint to be forwarded

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* target.h (target_ops) <to_insert_breakpoint>
<to_remove_breakpoint>: Add target_ops parameter.
(forward_target_insert_breakpoint): New.
(forward_target_remove_breakpoint): New.
(memory_remove_breakpoint, memory_insert_breakpoint):
Add target_ops parameter.
* target.c (target_insert_breakpoint): Split into this and ...
(forward_target_insert_breakpoint): ... this.
(target_remove_breakpoint): Split into this and ...
(forward_target_remove_breakpoint): ... this.
(debug_to_insert_breakpoint): Add target_ops parameter.
Call forward_target_insert_breakpoint.
(debug_to_remove_breakpoint): Add target_ops parameter.
Call forward_target_remove_breakpoint.
(update_current_target): Do not inherit or default to_insert_breakpoint
and to_remove_breakpoint.
* corelow.c (ignore): Add target_ops parameter.
* exec.c (ignore): Add target_ops parameter.
* mem-break.c (memory_insert_breakpoint, memory_remove_breakpoint):
Add target_ops parameter.
* monitor.c (monitor_insert_breakpoint, monitor_remove_breakpoint):
Add target_ops parameter.
* nto-procfs.c (procfs_insert_breakpoint, procfs_remove_breakpoint):
Add target_ops parameter.
* record-full.c (record_full_beneath_to_insert_breakpoint)
(record_full_beneath_to_remove_breakpoint, tmp_to_insert_breakpoint)
(tmp_to_remove_breakpoint, record_full_insert_breakpoint)
(record_full_remove_breakpoint, record_full_core_insert_breakpoint)
(record_full_core_remove_breakpoint): Add target_ops parameter.
Update users.
(record_full_beneath_to_insert_breakpoint_ops)
(record_full_beneath_to_remove_breakpoint_ops)
(tmp_to_insert_breakpoint_ops, tmp_to_remove_breakpoint_ops): New.
(record_full_open): Initialize tmp_to_insert_breakpoint_ops,
tmp_to_remove_breakpoint_ops,
record_full_beneath_to_insert_breakpoint_ops, and
record_full_beneath_to_remove_breakpoint_ops.
* remote-m32r-sdi.c (m32r_insert_breakpoint)
(m32r_remove_breakpoint): Add target_ops parameter.
* remote-mips.c (mips_insert_breakpoint, mips_remove_breakpoint):
Add target_ops parameter.
* remote.c (remote_insert_breakpoint, remote_remove_breakpoint):
Add target_ops parameter.

record-btrace, frame: supply target-specific unwinder

Supply a target-specific frame unwinder for the record-btrace target that does
not allow unwinding while replaying.

2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>
            Markus Metzger  <markus.t.metzger@intel.com>

gdb/
* record-btrace.c: Include frame-unwind.h.
(record_btrace_frame_unwind_stop_reason)
(record_btrace_frame_this_id, record_btrace_frame_prev_register)
(record_btrace_frame_sniffer, record_btrace_frame_unwind):
New.
(init_record_btrace_ops): Install it.

frame: do not assume unwinding will succeed

In get_frame_unwind_stop_reason, remove the assumption that further frame
unwinding will succeed.

gdb/
2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

* frame.c (get_frame_unwind_stop_reason): Unconditionally call
get_prev_frame_1.

frame, cfa: check unwind stop reason first

Swap the unwind stop reason check and the unwinder check to allow
non-dwarf2 frame types to fail with a recoverable error.

gdb/
2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

* dwarf2-frame.c (dwarf2_frame_cfa): Move UNWIND_UNAVAILABLE check
earlier.

frame, backtrace: allow targets to supply a frame unwinder

Allow targets to supply their own target-specific frame unwinders; one for
normal frames and one for tailcall frames.  If a target-specific unwinder
is supplied, it will be chosen before any other unwinder.

The original patch has been split into this and the next two patches.

gdb/
2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

* frame-unwind.c: Include target.h.
(frame_unwind_try_unwinder): New function with code from ...
(frame_unwind_find_by_frame): ... here.  New variable
unwinder_from_target, call also target_get_unwinder)
(target_get_tailcall_unwinder, and frame_unwind_try_unwinder for it.
* target.c (target_get_unwinder, target_get_tailcall_unwinder): New.
* target.h (struct target_ops): New fields to_get_unwinder and
to_get_tailcall_unwinder.
(target_get_unwinder, target_get_tailcall_unwinder): New declarations.

record-btrace: supply register target methods

Supply target methods to allow reading the PC.  Forbid anything else.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_fetch_registers)
(record_btrace_store_registers)
(record_btrace_to_prepare_to_store): New.
(init_record_btrace_ops): Add the above.

Add target_ops argument to to_prepare_to_store

2013-12-17  Tom Tromey  <tromey@redhat.com>

* windows-nat.c (windows_prepare_to_store): Add 'self' argument.
* target.h (struct target_ops) <to_prepare_to_store>: Add
argument.
(target_prepare_to_store): Add argument.
* target.c (debug_to_prepare_to_store): Add argument.
(update_current_target): Update.
* remote.c (remote_prepare_to_store): Add 'self' argument.
* remote-sim.c (gdbsim_prepare_to_store): Add 'self' argument.
* remote-mips.c (mips_prepare_to_store): Add 'self' argument.
* remote-m32r-sdi.c (m32r_prepare_to_store): Add 'self' argument.
* record-full.c (record_full_core_prepare_to_store): Add 'self'
argument.
* ravenscar-thread.c (ravenscar_prepare_to_store): Add argument.
* nto-procfs.c (procfs_prepare_to_store): Add 'self' argument.
* monitor.c (monitor_prepare_to_store): Add 'self' argument.
* inf-child.c (inf_child_prepare_to_store): Add 'self' argument.
* go32-nat.c (go32_prepare_to_store): Add 'self' argument.

btrace: add replay position to btrace thread info

Add a branch trace instruction iterator pointing to the current replay position
to the branch trace thread info struct.

Free the iterator when btrace is cleared.

Start at the replay position for the instruction and function-call histories.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* btrace.h (replay) <replay>: New.
(btrace_is_replaying): New.
* btrace.c (btrace_clear): Free replay iterator.
(btrace_is_replaying): New.
* record-btrace.c (record_btrace_is_replaying): New.
(record_btrace_info): Print insn number if replaying.
(record_btrace_insn_history): Start at replay position.
(record_btrace_call_history): Start at replay position.
(init_record_btrace_ops): Init to_record_is_replaying.

record-btrace: make ranges include begin and end

The "record function-call-history" and "record instruction-history" commands
accept a range "begin, end".  End is not included in both cases.  Include it.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (record_btrace_insn_history_range): Include
end.
(record_btrace_insn_history_from): Adjust range.
(record_btrace_call_history_range): Include
end.
(record_btrace_call_history_from): Adjust range.
* NEWS: Announce changes.

testsuite/
* gdb.btrace/function_call_history.exp: Update tests.
* gdb.btrace/instruction_history.exp: Update tests.

doc/
* gdb.texinfo (Process Record and Replay): Update documentation.

record-btrace: optionally indent function call history

Add a new modifier /c to the "record function-call-history" command to
indent the function name based on its depth in the call stack.

Also reorder the optional fields to have the indentation at the very beginning.
Prefix the insn range (/i modifier) with "inst ".
Prefix the source line (/l modifier) with "at ".
Change the range syntax from "begin-end" to "begin,end" to allow copy&paste to
the "record instruction-history" and "list" commands.

Adjust the respective tests and add new tests for the /c modifier.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record.h (enum record_print_flag)
<record_print_indent_calls>: New.
* record.c (get_call_history_modifiers): Recognize /c modifier.
(_initialize_record): Document /c modifier.
* record-btrace.c (btrace_call_history): Add btinfo parameter.
Reorder fields.  Optionally indent the function name.  Update
all users.
* NEWS: Announce changes.

testsuite/
* gdb.btrace/function_call_history.exp: Fix expected field
order for "record function-call-history".
Add new tests for "record function-call-history /c".
* gdb.btrace/exception.cc: New.
* gdb.btrace/exception.exp: New.
* gdb.btrace/tailcall.exp: New.
* gdb.btrace/x86-tailcall.S: New.
* gdb.btrace/x86-tailcall.c: New.
* gdb.btrace/unknown_functions.c: New.
* gdb.btrace/unknown_functions.exp: New.
* gdb.btrace/Makefile.in (EXECUTABLES): Add new.

doc/
* gdb.texinfo (Process Record and Replay): Document new /c
modifier accepted by "record function-call-history".
Add /i modifier to "record function-call-history" example.

btrace: increase buffer size

Try to allocate as much buffer as we can for each thread with a maximum
of 64KB.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* common/linux-btrace.c (linux_enable_btrace): Enlarge buffer.

record-btrace: start counting at one

The record instruction-history and record-function-call-history commands start
counting instructions at zero.  This is somewhat unintuitive when we start
navigating in the recorded instruction history.  Start at one, instead.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* btrace.c (ftrace_new_function): Start counting at one.
* record-btrace.c (record_btrace_info): Adjust number of calls
and insns.
* NEWS: Announce it.

testsuite/
    * gdb.btrace/instruction_history.exp: Update.
    * gdb.btrace/function_call_history.exp: Update.

record-btrace: fix insn range in function call history

With the "/i" modifier, we print the instruction number range in the
"record function-call-history" command as [begin, end).

It would be more intuitive if we printed the range as [begin, end].

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* record-btrace.c (btrace_call_history_insn_range): Print
insn range as [begin, end].

btrace: change branch trace data structure

The branch trace is represented as 3 vectors:
  - a block vector
  - a instruction vector
  - a function vector

Each vector (except for the first) is computed from the one above.

Change this into a graph where a node represents a sequence of instructions
belonging to the same function and where we have three types of edges to connect
the function segments:
  - control flow
  - same function (instance)
  - call stack

This allows us to navigate in the branch trace.  We will need this for "record
goto" and reverse execution.

This patch introduces the data structure and computes the control flow edges.
It also introduces iterator structs to simplify iterating over the branch trace
in control-flow order.

It also fixes PR gdb/15240 since now recursive calls are handled correctly.
Fix the test that got the number of expected fib instances and also the
function numbers wrong.

The current instruction had been part of the branch trace.  This will look odd
once we start support for reverse execution.  Remove it.  We still keep it in
the trace itself to allow extending the branch trace more easily in the future.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* btrace.h (struct btrace_func_link): New.
(enum btrace_function_flag): New.
(struct btrace_inst): Rename to ...
(struct btrace_insn): ...this. Update all users.
(struct btrace_func) <ibegin, iend>: Remove.
(struct btrace_func_link): New.
(struct btrace_func): Rename to ...
(struct btrace_function): ...this. Update all users.
(struct btrace_function) <segment, flow, up, insn, insn_offset)
(number, level, flags>: New.
(struct btrace_insn_iterator): Rename to ...
(struct btrace_insn_history): ...this.
Update all users.
(struct btrace_insn_iterator, btrace_call_iterator): New.
(struct btrace_target_info) <btrace, itrace, ftrace>: Remove.
(struct btrace_target_info) <begin, end, level>
<insn_history, call_history>: New.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* btrace.c (btrace_init_insn_iterator)
(btrace_init_func_iterator, compute_itrace): Remove.
(ftrace_print_function_name, ftrace_print_filename)
(ftrace_skip_file): Change
parameter to const.
(ftrace_init_func): Remove.
(ftrace_debug): Use new btrace_function fields.
(ftrace_function_switched): Also consider gaining and
losing symbol information).
(ftrace_print_insn_addr, ftrace_new_call, ftrace_new_return)
(ftrace_new_switch, ftrace_find_caller, ftrace_new_function)
(ftrace_update_caller, ftrace_fixup_caller, ftrace_new_tailcall):
New.
(ftrace_new_function): Move. Remove debug print.
(ftrace_update_lines, ftrace_update_insns): New.
(ftrace_update_function): Check for call, ret, and jump.
(compute_ftrace): Renamed to ...
(btrace_compute_ftrace): ...this. Rewritten to compute call
stack.
(btrace_fetch, btrace_clear): Updated.
(btrace_insn_get, btrace_insn_number, btrace_insn_begin)
(btrace_insn_end, btrace_insn_prev, btrace_insn_next)
(btrace_insn_cmp, btrace_find_insn_by_number, btrace_call_get)
(btrace_call_number, btrace_call_begin, btrace_call_end)
(btrace_call_prev, btrace_call_next, btrace_call_cmp)
(btrace_find_function_by_number, btrace_set_insn_history)
(btrace_set_call_history): New.
* record-btrace.c (require_btrace): Use new btrace thread
info fields.
(record_btrace_info, btrace_insn_history)
(record_btrace_insn_history, record_btrace_insn_history_range):
Use new btrace thread info fields and new iterator.
(btrace_func_history_src_line): Rename to ...
(btrace_call_history_src_line): ...this. Use new btrace
thread info fields.
(btrace_func_history): Rename to ...
(btrace_call_history): ...this. Use new btrace thread info
fields and new iterator.
(record_btrace_call_history, record_btrace_call_history_range):
Use new btrace thread info fields and new iterator.

testsuite/
* gdb.btrace/function_call_history.exp: Fix expected function
trace.
* gdb.btrace/instruction_history.exp: Initialize traced.
Remove traced_functions.

frame: add frame_id_build_unavailable_stack_special

Add a function to build a frame_id for a frame with unavailable stack
and with a special identifier address.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* frame.h (frame_id_build_unavailable_stack_special): New.
* frame.c (frame_id_build_unavailable_stack_special): New.

gdbarch: add instruction predicate methods

Add new methods to gdbarch for analyzing the instruction at a given address.
Implement those methods for i386 and amd64 architectures.

This is needed by "record btrace" to detect function calls in the
execution trace.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* amd64-tdep.c (amd64_classify_insn_at, amd64_insn_is_call)
(amd64_insn_is_ret, amd64_insn_is_jump, amd64_jmp_p): New.
(amd64_init_abi): Add insn_is_call, insn_is_ret, and insn_is_jump
to gdbarch.
* i386-tdep.c (i386_insn_is_call, i386_insn_is_ret)
(i386_insn_is_jump, i386_jmp_p): New.
(i386_gdbarch_init): Add insn_is_call, insn_is_ret, and
insn_is_jump to gdbarch.
* gdbarch.sh (insn_is_call, insn_is_ret, insn_is_jump): New.
* gdbarch.h: Regenerated.
* gdbarch.c: Regenerated.
* arch-utils.h (default_insn_is_call, default_insn_is_ret)
(default_insn_is_jump): New.
* arch-utils.c (default_insn_is_call, default_insn_is_ret)
(default_insn_is_jump): New.

btrace: uppercase btrace_read_type

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* common/btrace-common.h (btrace_read_type) <btrace_read_all>:
Change to ...
(btrace_read_type) <BTRACE_READ_ALL>: ... this.  Update users.
(btrace_read_type) <btrace_read_new>: Change to ...
(btrace_read_type) <BTRACE_READ_NEW>: ... this.  Update users.

btrace, linux: fix memory leak when reading branch trace

When it takes more than one iteration to read the BTS trace, the trace from the
previous iteration is leaked.  Fix it.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* common/linux-btrace.c (linux_read_btrace): Free trace from
previous iteration.

btrace, test: fix multi-line btrace tests

For testing multi-line test output, gdb.btrace tests used the following
pattern:

  gdb_test "..." "
  ...\r
  ..."

Change this to:

  gdb_test "..." [join [list \
    "..." \
    "..."] "\r\n"]

Also extract repeated tests into a test function and shorten or remove
test messages.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

testsuite/
* gdb.btrace/function_call_history.exp: Update
* gdb.btrace/instruction_history.exp: Update.

test, btrace: update expected text

The error message for starting recording twice changed.
Update the expected text to fix resulting regressions.

2014-01-16  Markus Metzger  <markus.t.metzger@intel.com>

* gdb.btrace/enable.exp: Update expected text.

Fix testsuite/gdb.dwarf2/dw2-dos-drive.exp on ARM.

This test currently fails on ARM:

  (gdb) PASS: gdb.dwarf2/dw2-dos-drive.exp: set breakpoint pending off
  break 'z:file.c':func
  Cannot access memory at address 0x0

The error is GDB trying to read the prologue at the breakpoint's
address, and failing:

  38 throw_error() exceptions.c:444 0x0016728c
  37 memory_error() corefile.c:204 0x001d1fcc
  36 read_memory() corefile.c:223 0x001d201a
  35 read_memory_unsigned_integer() corefile.c:312 0x001d2166
  34 arm_skip_prologue() arm-tdep.c:1452 0x00054270

  static CORE_ADDR
  arm_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
  {
  ...
    for (skip_pc = pc; skip_pc < limit_pc; skip_pc += 4)
      {
        inst = read_memory_unsigned_integer (skip_pc, 4, byte_order_for_code);

The test doesn't execute the compiled object's code, so GDB will try
to read memory from the binary's sections.  Instructions on ARM are
4-byte wide, and thus ARM's prologue scanner reads in 4-byte chunks.
As the section 'func' is put at is only 1 byte long, and no other
section is allocated contiguously:

  ...
  Sections:
  Idx Name          Size      VMA       LMA       File off  Algn
    0 .text         00000001  00000000  00000000  00000034  2**0
                    CONTENTS, ALLOC, LOAD, READONLY, CODE
  ...

... the exec target fails the read the 4 bytes.

Fix this by increasing the function's size.

gdb/testsuite/ChangeLog:
2014-01-16  Omair Javaid  <Omair.Javaid@linaro.org>

* gdb.dwarf2/dw2-dos-drive.S: Increase text section size to 4
bytes.

Skip directories with LIBPATH_SUFFIX_SKIP suffix

On Linux/x86-64, when binutils is configured with --libdir=/usr/lib64,
genscripts.sh treats /usr/lib64 as the default search directory.  It
puts /usr/lib64 in linker scripts for all emulations, like

---
/* Script for -z combreloc: combine and sort reloc sections */
OUTPUT_FORMAT("elf32-i386", "elf32-i386",
      "elf32-i386")
OUTPUT_ARCH(i386)
ENTRY(_start)
SEARCH_DIR("/usr/x86_64-redhat-linux/lib32");
SEARCH_DIR("/usr/i386-redhat-linux/lib32"); SEARCH_DIR("/usr/lib6432");
SEARCH_DIR("/usr/local/lib32"); SEARCH_DIR("/lib32");
SEARCH_DIR("/usr/lib32"); SEARCH_DIR("/usr/i386-redhat-linux/lib");
SEARCH_DIR("/usr/lib64"); SEARCH_DIR("/usr/local/lib");
SEARCH_DIR("/lib"); SEARCH_DIR("/usr/lib");
---

/usr/lib6432 is odd and /usr/lib64 is wrong.  This patch changes
genscripts.sh to check LIBPATH_SUFFIX_SKIP if it is defined.  It
skips directories with LIBPATH_SUFFIX_SKIP suffix.

PR ld/16456
* genscripts.sh: Don't search directory with LIBPATH_SUFFIX_SKIP
suffix.
* emulparams/elf32_x86_64.sh (LIBPATH_SUFFIX_SKIP): Set to 64
for elf32_x86_64 emulation.
* emulparams/elf_i386.sh (LIBPATH_SUFFIX_SKIP): Set to 64
for elf_i386 emulation.

Tidy ld use of bfd_section userdata.

A long time ago ld made use of userdata to tie an output section to
its lang_input_statement_struct object file.  Some time later Joern
made map file printing of symbols at lot faster, using userdata on
input sections.  That complicated allocation of userdata, and when the
output section use disappeared a year later, the code wasn't properly
cleaned up.  This patch does that cleanup, and also tidies the symbol
printing code to not allocate userdata where it won't be needed.  We
don't print symbols defined in the absolute section or in output
sections.

* ld.h (fat_section_userdata_type, get_userdata): Move to..
* ldlang.h (input_section_userdata_type, get_userdata): ..here.
* ldlang.c (init_map_userdata): Delete.  Fold into..
(sort_def_symbol): ..here.  Don't attach input section userdata
to output sections or global bfd sections.
(lang_map): Don't pre-allocate input section userdata.
(init_os): Don't allocate userdata for output sections.
(print_all_symbols): Update.

Fix mips segfault on GOT access of absolute symbol

When a symbol is absolute, this code in mips_elf_record_got_page_entry
      entry = bfd_zalloc (sec->owner, sizeof (*entry));
segfaults.  sec == bfd_abs_section_ptr and sec->owner == NULL.

* elfxx-mips.c (mips_elf_record_got_page_entry): Pass in a
mips_elf_traverse_got_arg* rather than mips_got_info*.
Adjust caller.  Alloc on output_bfd rather than symbol section
owner.

delete thread_id_to_gdb_id, unused

* inferiors.c (thread_id_to_gdb_id): Delete.
* inferiors.h (thread_id_to_gdb_id): Delete.

daily update

AArch64: gdb.base/float.exp: Fix `info float' test

* gdb.base/float.exp: Handle "aarch64*-*-*" targets.

* dwarf2read.c (open_and_init_dwp_file): Use pulongest to print uint32_t.

move the "main" data into the per-BFD object

This adds the "main"-related data into the per-BFD.  This is needed
because once symbol sharing across objfiles is complete, computing the
main name as a side effect of symbol reading will no longer work --
the symbols simply won't be re-read.

After this change, set_main_name is only used by the main_name
machinery itself, so this patch makes it static.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* dbxread.c (process_one_symbol): Use set_objfile_main_name.
* dwarf2read.c (read_partial_die): Use set_objfile_main_name.
* objfiles.c (get_objfile_bfd_data): Initialize language_of_main.
(set_objfile_main_name): New function.
* objfiles.h (struct objfile_per_bfd_storage) <name_of_main,
language_of_main>: New fields.
(set_objfile_main_name): Declare.
* symtab.c (find_main_name): Loop over objfiles to find the main
name and language.
(set_main_name): Now static.
(get_main_info): Add comment.
* symtab.h (set_main_name): Don't declare.

move main name into the progspace

This moves the "main" name and language into an object attached to the
current progspace.  This prevents problems if there are multiple
inferiors tha have different ideas of "main" -- which matters at least
for unwinding, see frame.c:inside_main_func.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* symtab.c (main_progspace_key): New global.
(struct main_info): New.
(name_of_main, language_of_main): Remove.
(get_main_info, main_info_cleanup): New function.
(set_main_name, main_name, main_language): Use get_main_info.
(_initialize_symtab): Initialize main_progspace_key.

make language_of_main static

This makes the global language_of_main static.  Now it can be set only
via a new argument to set_main_name.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* dbxread.c (process_one_symbol): Update.
* dwarf2read.c (read_partial_die): Update.
* symfile.c (set_initial_language): Call main_language.
* symtab.c (language_of_main): Now static.
(set_main_name): Add 'lang' parameter.
(find_main_name): Update.
(main_language): New function.
(symtab_observer_executable_changed): Update.
* symtab.h (set_main_name): Update.
(language_of_main): Remove.
(main_language): Declare.

move the entry point info into the per-bfd object

This moves the entry point information into the per-BFD object and
arranges not to recompute it when it has already been computed.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* symfile.c (init_entry_point_info): Use new "initialized" field.
Update.
* objfiles.h (struct entry_point) <initialized>: New field.
(struct objfile_per_bfd_storage) <ei>: New field, moved from...
(struct objfile) <ei>: ...here.  Remove.
* objfiles.c (entry_point_address_query): Update.

relocate the entry point address when used

This changes the entry point to be unrelocated in the objfile, and
instead applies the relocation when it is used.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* objfiles.c (entry_point_address_query): Relocate entry point
address.
(objfile_relocate1): Do not relocate entry point address.
* objfiles.h (struct entry_info) <entry_point>: Update comment.
<the_bfd_section_index>: New field.
* symfile.c (init_entry_point_info): Find the entry point's
section.

change solib-frv to use entry_point_address_query

This is just a minor cleanup in advance of some other changes, that
modifies solib-frv.c to use entry_point_address_query.  I don't have a
good way to test this but I think it is obviously correct.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* solib-frv.c (enable_break): Use entry_point_address_query.

gdb: Add a NEWS entry for ARM record/replay improvements

This patch adds a news entry about improvements in record-replay and
reverse debugging support for arm*-linux* targets.

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* NEWS: Add note on improved process record-replay on
arm*-linux* targets.

gdb: ARM: Update configure.tgt and enable gdb.reverse testsuite

gdb/testsuite/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* lib/gdb.exp (supports_process_record): Return true for
arm*-linux*.  (supports_reverse): Likewise.

gdb: ARM: Add support for thumb32 instructions recording

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* arm-tdep.c (enum arm_record_result): New enum.
(arm_record_unsupported_insn): New function.
(arm_record_coproc_data_proc): Removed.
(thumb2_record_ld_st_multiple): New function.
(thumb2_record_ld_st_dual_ex_tbb): New function.
(thumb2_record_data_proc_sreg_mimm): New function.
(thumb2_record_ps_dest_generic): New function.
(thumb2_record_branch_misc_cntrl): New function.
(thumb2_record_str_single_data): New function.
(thumb2_record_ld_mem_hints): New function.
(thumb2_record_ld_word): New function.
(thumb2_record_lmul_lmla_div): New function.
(thumb2_record_decode_insn_handler): New function.
(decode_insn): Add thumb32 instruction handlers.

gdb: ARM: Adds support for recording system call instructions

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* arm-linux-tdep.c: Include "record-full.h" and "linux-record.h".
(struct arm_linux_record_tdep): Declare.
(arm_canonicalize_syscall): New function.
(arm_all_but_pc_registers_record): New function.
(arm_linux_syscall_record): New function.
(arm_linux_init_abi): Add syscall recording constructs.
* arm-tdep.c (thumb_record_ldm_stm_swi): Update thumb syscall
decoding.  (arm_record_coproc_data_proc): Update arm syscall
decoding.
* arm-tdep.h (struct gdbarch_tdep) <arm_swi_record>: Remove.
<arm_syscall_record>: New field.
* configure.tgt (arm*-*-linux*): Add linux-record.o to
gdb_target_obs.

gdb: ARM: Fix for bug in pop instruction decoding

This patch fixes thumb push instruction recording by replacing base
register from pc to sp.

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* arm-tdep.c (thumb_record_misc): Update to use sp as base
register for push instruction recording.

gdb: ARM: Fix for bugs in push and ldm instructions decoding

This patch corrects the register numbers and removes multiple loops in
recording procedure of instructions involving multiple registers.

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* arm-tdep.c (thumb_record_misc): Update to correct logical
error while recording ldm, ldmia and pop instructions.

gdb: ARM: Fix for memory record corruption due to 64bit addresses

gdb/ChangeLog:

2014-01-15  Omair Javaid  <omair.javaid@linaro.org>

* arm-tdep.c (struct arm_mem_r) <addr>: Change type to uint32_t.

Fix go32-nat.c build fallout from to_detach constification.

The recent constification of to_detach missed updating the forward
declaration of go32_detach, breaking the build:

 ../../src/gdb/go32-nat.c:387:1: error: conflicting types for 'go32_detach'
 ../../src/gdb/go32-nat.c:240:13: note: previous declaration of 'go32_detach' was here

go32_detach is actually defined before it's ever used, making the
forward declaration is unnecessary.  So we can just remove it instead
of updating it.  While at it, remove all others in the same situation.
Tested by building a djgpp gdb.

gdb/
2014-01-15  Pedro Alves  <palves@redhat.com>

* go32-nat.c (go32_open, go32_close, go32_attach, go32_detach)
(go32_resume, go32_fetch_registers, store_register)
(go32_store_registers, go32_prepare_to_store)
(go32_xfer_memory, go32_files_info, go32_kill_inferior)
(go32_create_inferior, go32_can_run, go32_terminal_init)
(go32_terminal_inferior, go32_terminal_ours): Delete forward
declarations.

Silence uninitialized warning on ehdr_start_save

Older GCC, like 4.1/4.2, will issue an uninitialized warning on
ehdr_start_save.  This patch silences by using

struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save;

* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation):
Silence uninitialized warning on ehdr_start_save with older
GCC.

introduce async_callback_ftype

This introduces async_callback_ftype.  This is needed for
make-target-delegates to work properly, as it doesn't implement a real
parser.  I think it's also an ok cleanup in its own right.

2014-01-15  Tom Tromey  <tromey@redhat.com>

* target.h (async_callback_ftype): New typedef.
(struct target_ops) <to_async>: Use it.

Fix small style violation in py-value.c:get_field_type

gdb/ChangeLog:

        * python/py-value.c (get_field_type): Remove unnecessary curly
        braces for single-statement if block.

Tested on x86_64-linux.

Add missing empty line after declarations in "if" block (py-type.c).

This patch fixes a small coding-style violation...

gdb/ChangeLog:

        * python/py-type.c (convert_field): Add missing empty line
        after declarations.

Small fixes to the GDB/MI Output Syntax grammar.

This patch fixes the grammar, and tries to do it in a way that makes
the logic behind the current implementation a little clearer.

gdb/doc/ChangeLog:

        (from Yuanhui Zhang  <asmwarrior@gmail.com>)
        (from Joel Brobecker  <brobecker@adacore.com>)
        * gdb.texinfo (GDB/MI Output Syntax): Add some missing "nl"
        markers.  Remove one that was misplaced.

Revert the last change

It has been fixed by

commit 4199e3b8669d0a36448687850374fdc2ad7240b6
Author: Alan Modra <amodra@gmail.com>
Date:   Wed Jan 15 21:50:55 2014 +1030

    non-PIC references to __ehdr_start in pie and shared

    Rather than hacking every backend to not discard dynamic relocations
    against an undefined hidden __ehdr_start, make it appear to be defined
    early.  We want __ehdr_start hidden before size_dynamic_sections so
    that it isn't put in .dynsym, but we do need the dynamic relocations
    for a PIE or shared library with a non-PIC reference.  Defining it
    early is wrong if we don't actually define the symbol later to its
    proper value.  (In some cases we want to leave the symbol undefined,
    for example, when the ELF header isn't loaded, and we don't have this
    infomation available in before_allocation.)

* elf32-i386.c (elf_i386_allocate_dynrelocs): Revert the last
change.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.

non-PIC references to __ehdr_start in pie and shared

Rather than hacking every backend to not discard dynamic relocations
against an undefined hidden __ehdr_start, make it appear to be defined
early.  We want __ehdr_start hidden before size_dynamic_sections so
that it isn't put in .dynsym, but we do need the dynamic relocations
for a PIE or shared library with a non-PIC reference.  Defining it
early is wrong if we don't actually define the symbol later to its
proper value.  (In some cases we want to leave the symbol undefined,
for example, when the ELF header isn't loaded, and we don't have this
infomation available in before_allocation.)

ld/
* emultempl/elf32.em (gld${EMULATION_NAME}_before_allocation): Define
__ehdr_start before size_dynamic_sections and restore afterwards.
ld/testsuite/
* ld-elf/ehdr_start-shared.d: New.
* ld-elf/ehdr_start-userdef.d: xfail frv.
* ld-elf/ehdr_start-weak.d: Likewise.
* ld-elf/ehdr_start.d: Likewise.

psymtab cleanup patch 3/3

This last patch removes "partial" from the names of
expand_partial_symbol_names and map_partial_symbol_filenames.
It also renames expand_partial_symbol_names to match the
struct quick_symbol_functions "method" that it wraps:
expand_symtabs_matching.

This patch also adds two parameters to expand_symtabs_matching
so that it can fully wrap the underlying quick_symbol_functions method.
This makes it usable in more places.
I thought of having a cover function that still had the same
signature as the old expand_partial_symbol_names function,
but I couldn't think of a good name, and it wasn't clear it was
worth it anyway.

* symfile.h (expand_symtabs_matching): Renamed from
expand_partial_symbol_names.  Update prototype.
(map_symbol_filenames): Renamed from map_partial_symbol_filenames.
* symfile.c (expand_symtabs_matching): Renamed from
expand_partial_symbol_names.  New args file_matcher, kind.
Rename arg fun to symbol_matcher.
(map_symbol_filenames): Renamed from map_partial_symbol_filenames.
* ada-lang.c (ada_complete_symbol_matcher): Renamed from
ada_expand_partial_symbol_name.
(ada_make_symbol_completion_list): Update to call
expand_symtabs_matching.
(ada_add_global_exceptions): Call expand_symtabs_matching.
* mi/mi-cmd-file.c (mi_cmd_file_list_exec_source_files): Update to
call map_symbol_filenames.
* symtab.c (sources_info): Update to call map_symbol_filenames.
(search_symbols): Call expand_symtabs_matching.
(symbol_completion_matcher): Renamed from expand_partial_symbol_name.
(default_make_symbol_completion_list_break_on): Update to call
expand_symtabs_matching.
(make_source_files_completion_list): Update to call
map_symbol_filenames.

psymtab cleanup patch 2/3

This patch adds two typedefs:
expand_symtabs_file_matcher_ftype
expand_symtabs_symbol_matcher_ftype

It also renames the NAME_MATCHER argument in expand_symtabs_matching.
The function is named expand_symtabs_matching and it takes a name_matcher
argument.  Name of what?  The symtab?  A symbol?
I made it SYMBOL_MATCHER to make it clearer.

* symfile.h (expand_symtabs_file_matcher_ftype): New typedef.
(expand_symtabs_symbol_matcher_ftype): New typedef.
(quick_symbol_functions.expand_symtabs_matching): Update to use.
expand_symtabs_file_matcher_ftype, expand_symtabs_symbol_matcher_ftype.
* symfile.c (expand_partial_symbol_names): Update to use
expand_symtabs_symbol_matcher_ftype.
* dwarf2read.c (dw2_expand_symtabs_matching): Update to use
expand_symtabs_file_matcher_ftype, expand_symtabs_symbol_matcher_ftype.
Arg name_matcher renamed to symbol_matcher.
* psymtab.c (recursively_search_psymtabs): Update to use
expand_symtabs_symbol_matcher_ftype.  Arg name_matcher renamed to
sym_matcher.
(expand_symtabs_matching_via_partial): Update to use
expand_symtabs_file_matcher_ftype, expand_symtabs_symbol_matcher_ftype.
Arg name_matcher renamed to symbol_matcher.

psymtab cleanup patch 1/3

This is the first of a set of three patches to cleanup psymtab.c a bit.

Basically, these two functions do not belong in psymtab.c:
expand_partial_symbol_names, map_partial_symbol_filenames,
and "partial" does not belong in the function name.

This first patch moves them to a better location.
The second patch adds some typedefs for function parameters to
quick_symbol_functions.expand_symtabs_matching.
The third patch removes "partial" from the function names
and uses them in more places.

* psymtab.c (expand_partial_symbol_names): Delete, moved to symfile.c.
(map_partial_symbol_filenames): Ditto.
* psymtab.h (expand_partial_symbol_names): Delete, moved to symfile.h.
(map_partial_symbol_filenames): Ditto.
* symfile.c (expand_partial_symbol_names): Moved here from psymtab.c.
(map_partial_symbol_filenames): Ditto.
* symfile.h (expand_partial_symbol_names): Moved here from psymtab.h.
(map_partial_symbol_filenames): Ditto.
* symtab.c: Delete #include "psymtab.h".

Don't discard relocs against __ehdr_start

__ehdr_start will be defined by assign_file_positions_for_non_load_sections
later.

PR ld/16428
* elf32-i386.c (elf_i386_allocate_dynrelocs): Don't discard relocs
against __ehdr_start.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.

Revert the last change

* elf32-i386.c (elf_i386_allocate_dynrelocs): Revert the last
change.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.

daily update

Don't update reloc count if there are any non pc-relative relocs

PR ld/16428
* elf32-i386.c (elf_i386_allocate_dynrelocs): Don't update reloc
count if there are any non pc-relative relocs.
* elf64-x86-64.c (elf_x86_64_allocate_dynrelocs): Likewise.

Fix "is a record target open" checks.

RECORD_IS_USED and record_full_open look at current_target.to_stratum
to determine whether a record target is in use.  This is wrong because
arch_stratum is greater than record_stratum, so if an arch_stratum
target is pushed, RECORD_IS_USED and record_full_open will miss it.

To fix this, we can use the existing find_record_target instead, which
looks up for a record stratum target across the target stack.  Since
that means exporting find_record_target in record.h, RECORD_IS_USED
ends up redundant, so the patch eliminates it.

That exercise then reveals other issues:

- adjust_pc_after_break is gating record_full_... calls based on
RECORD_IS_USED.  But, record_full_ calls shouldn't be made when
recording with the record-btrace target.  So this adds a new
record_full_is_used predicate to be used in that spot.

- record_full_open says "Process record target already running", even
if the recording target is record-btrace ("process record" is the
original complete name of the record-full target).  record_btrace_open
only says "The process is already being recorded." and does not
suggest "record stop", like record-full does.  The patch factors out
and merges that error to a new record_preopen function that all record
targets call in their open routine.

Tested on x86_64 Fedora 17.

gdb/
2014-01-14  Pedro Alves  <palves@redhat.com>
    Tom Tromey  <tromey@redhat.com>

* infrun.c (use_displaced_stepping): Use find_record_target
instead of RECORD_IS_USED.
(adjust_pc_after_break): Use record_full_is_used instead of
RECORD_IS_USED.
* record-btrace.c (record_btrace_open): Call record_preopen
instead of checking RECORD_IS_USED.
* record-full.c (record_full_shortname)
(record_full_core_shortname): New globals.
(record_full_is_used): New function.
(find_full_open): Call record_preopen instead of checking
RECORD_IS_USED.
(init_record_full_ops): Set the target's shortname to
record_full_shortname.
(init_record_full_core_ops): Set the target's shortname to
record_full_core_shortname.
* record-full.h (record_full_is_used): Declare.
* record.c (find_record_target): Make extern.
(record_preopen): New function.
* record.h (RECORD_IS_USED): Delete macro.
(find_record_target, record_preopen): Declare functions.

2014-01-14  Michael Hudson-Doyle  <michael.hudson@linaro.org>
    Kugan Vivekanandarajah  <kugan.vivekanandarajah@linaro.org>

bfd/
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Use correct
offset while calculating relocation address.
(elfNN_aarch64_create_small_pltn_entry): Likewise.
(elfNN_aarch64_init_small_plt0_entry): Likewise.

Change 'len''s type from LONGEST to ULONGEST: gdbarch methods core_xfer_shared_libraries and core_xfer_shared_libraries_aix

This patch changes the type of 'len' from LONGEST to ULONGEST.  'len'
is the argument of gdbarch methods core_xfer_shared_libraries and
core_xfer_shared_libraries_aix.

gdb:

2014-01-14  Yao Qi  <yao@codesourcery.com>

* gdbarch.sh (core_xfer_shared_libraries): Change its argument
'len''s type to ULONGEST.
(core_xfer_shared_libraries_aix): Likewise.
* gdbarch.c, gdbarch.h: Reenerated.
* i386-cygwin-tdep.c (windows_core_xfer_shared_libraries):
Change type of 'len' to ULONGEST.
* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
(rs6000_aix_core_xfer_shared_libraries_aix): Likewise.

Change 'len' of linux_common_xfer_osdata to ULONGEST.

gdb:

2014-01-14  Yao Qi  <yao@codesourcery.com>

* common/linux-osdata.c (linux_xfer_osdata_processes): Change
type of 'len' to ULONGEST.
(linux_xfer_osdata_processgroups): Likewise.
(linux_xfer_osdata_threads): Likewise.
(linux_xfer_osdata_fds): Likewise.
(linux_xfer_osdata_isockets): Likewise.
(linux_xfer_osdata_shm): Likewise.
(linux_xfer_osdata_sem): Likewise.
(linux_xfer_osdata_msg): Likewise.
(linux_common_xfer_osdata): Likewise.
(struct osdata_type) <getter>: Likewise.
* common/linux-osdata.h (linux_common_xfer_osdata): Update
the declaration.

Change to_xfer_partial 'len' type to ULONGEST.

This patch changes to_xfer_partial's len's type to ULONGEST, and
adjust its implementations.

gdb:

2014-01-14  Yao Qi  <yao@codesourcery.com>

* target.h (target_xfer_partial_ftype): Update.
(struct target_ops) <to_xfer_partial>: Change 'len' type to
ULONGEST.
* aix-thread.c (aix_thread_xfer_partial): Change type of
argument 'len' to ULONGEST.
* auxv.c (procfs_xfer_auxv): Likewise.
(ld_so_xfer_auxv): Likewise.
(memory_xfer_auxv): Likewise.
* bfd-target.c (target_bfd_xfer_partial): Likewise.
* bsd-kvm.c (bsd_kvm_xfer_partial): Likewise.
* bsd-uthread.c (bsd_uthread_xfer_partial): Likewise.
* corelow.c (core_xfer_partial): Likewise.
* ctf.c (ctf_xfer_partial): Likewise.
* darwin-nat.c (darwin_read_write_inferior): Likewise.  Use
'%u'.
(darwin_read_dyld_info): Likewise.
(darwin_xfer_partial): Likewise.
* exec.c (section_table_xfer_memory_partial): Likewise.
(exec_xfer_partial): Likewise.
* exec.h (section_table_xfer_memory_partial): Update
declaration.
* gnu-nat.c (gnu_xfer_memory): Likewise.  Call pulongest
instead of plongest.
(gnu_xfer_partial): Likewise.
* ia64-hpux-nat.c (ia64_hpux_xfer_memory): Likewise.
(ia64_hpux_xfer_solib_got): Likewise.
(ia64_hpux_xfer_partial): Likewise.
* ia64-linux-nat.c (ia64_linux_xfer_partial):
* inf-ptrace.c (inf_ptrace_xfer_partial):
* inf-ttrace.c (inf_ttrace_xfer_partial):
* linux-nat.c (linux_xfer_siginfo): Likewise.
(linux_nat_xfer_partial): Likewise.
(spu_enumerate_spu_ids, linux_proc_xfer_spu): Likewise.
(linux_nat_xfer_osdata, linux_xfer_partial): Likewise.
* monitor.c (monitor_xfer_memory): Likewise.
(monitor_xfer_partial): Likewise.
* procfs.c (procfs_xfer_partial): Likewise.
* record-full.c (record_full_xfer_partial): Likewise.
(record_full_core_xfer_partial): Likewise.
* remote-sim.c (gdbsim_xfer_memory): Likewise.  Call pulongest
instead of plongest.
(gdbsim_xfer_partial): Likewise.
* remote.c (remote_xfer_partial): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_ld_info_to_xml): Likewise.
* rs6000-aix-tdep.h (rs6000_aix_ld_info_to_xml): Update
declaration.
* rs6000-nat.c (rs6000_xfer_partial): Likewise.
(rs6000_xfer_shared_libraries): Likewise.
* sol-thread.c (sol_thread_xfer_partial): Likewise.
* sparc-nat.c (sparc_xfer_wcookie): Likewise.
(sparc_xfer_partial): Likewise.
* spu-linux-nat.c (spu_proc_xfer_spu): Likewise.
(spu_xfer_partial): Likewise.
* spu-multiarch.c (spu_xfer_partial): Likewise.
* target.c (target_read_live_memory): Likewise.
(memory_xfer_live_readonly_partial): Likewise.
(memory_xfer_partial, memory_xfer_partial_1): Likewise.
(target_xfer_partial, default_xfer_partial): Likewise.
(current_xfer_partial): Likewise.
* tracepoint.c (tfile_xfer_partial): Likewise.
* windows-nat.c (windows_xfer_memory): Likewise.  Call
pulongest instead of plongest.
(windows_xfer_partial): Likewise.
(windows_xfer_shared_libraries): Likewise.

Use target_xfer_partial_ftype for rs6000_xfer_shared_libraries

Hi,
We can use target_xfer_partial_ftype here for
rs6000_xfer_shared_libraries declaration.

gdb:

2014-01-14  Yao Qi  <yao@codesourcery.com>

* rs6000-nat.c (rs6000_xfer_shared_libraries): Use
target_xfer_partial_ftype.

* lib/ld-lib.exp (default_ld_link): Remove support for ldflags.
(default_ld_simple_link): Likewise.