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86454 commits

Author SHA1 Message Date
Marcin Kościelnicki
e44e00ffff gdb.trace/tfile-avx.c: Change ymm15 to xmm15 for old gcc.
gcc older than 4.9 doesn't understand ymm15 as a register name.  Use
xmm15 instead.

gdb/testsuite/ChangeLog:

	* gdb.trace/tfile-avx.c (main): Change ymm15 to xmm15.
2016-02-12 21:51:37 +01:00
Simon Marchi
97e9415187 i386-biarch-core.exp: Use standard_output_file
Fix the core file path to use the standard output directory.

gdb/testsuite/ChangeLog:

	* i386-biarch-core.exp: Define corefile using
	standard_output_file.
2016-02-12 13:56:21 -05:00
Yao Qi
a5652c21a8 [gdbserver, aarch64] Use linux_{set,get}_pc_{64,32}bit
We can use shared functions linux_{set,get}_pc_{64,32}bit in
linux-aarch64-low.c to write and read pc.

gdb/gdbserver:

2016-02-12  Yao Qi  <yao.qi@linaro.org>

	* linux-aarch64-low.c (aarch64_get_pc): Call linux_get_pc_64bit
	or linux_get_pc_32bit.
	(aarch64_set_pc): Call linux_set_pc_64bit or linux_set_pc_32bit.
2016-02-12 16:08:25 +00:00
Yao Qi
01113bc1c5 [ARM] Software single step cross kernel helpers
GDB step cross kernel helpers only works if the kernel helpers are tail
called, which is the case how it is used in glibc.  See __aeabi_read_tp
in sysdeps/unix/sysv/linux/arm/aeabi_read_tp.S.  In __aeabi_read_tp,
branch/jump to the kernel helper is the last instruction, and the next
instruction address is in LR, which is in caller function.  GDB can
handle this correctly.  For example, glibc function __GI___ctype_init
calls __aeabi_read_tp

   0xb6e19b30 <__GI___ctype_init+4>:	ldr	r3, [pc, #80]	;
   0xb6e19b34 <__GI___ctype_init+8>:	bl	0xb6e0a6e0 <__aeabi_read_tp>
   0xb6e19b38 <__GI___ctype_init+12>:	ldr	r3, [pc, r3]

and __aeabi_read_tp calls kernel helper,

(gdb) disassemble __aeabi_read_tp
   0xb6fef5d0 <+0>:	mvn	r0, #61440	; 0xf000
   0xb6fef5d4 <+4>:	sub	pc, r0, #31

once GDB or GDBserver single step instruction on 0xb6fef5d4, LR is
0xb6e19b38, which is right address of next instruction to set breakpoint
on.

However, if the kernel helpers are not tail-called, the LR is still the
address in the caller function of kernel helper's caller, which isn't
the right address of next instruction to set breakpoint on.  For example,
we use kernel helper in main,

(gdb) disassemble main
....
   0x00008624 <+32>:    mov     r3, #4064       ; 0xfe0^M
   0x00008628 <+36>:    movt    r3, #65535      ; 0xffff^M
   0x0000862c <+40>:    blx     r3
   0x00008630 <+44>:    ldr     r3, [r11, #-8]

kernel helper is called on 0x0000862c and the expected next instruction
address is 0x00008630, but the LR now is the return address of main.
The problem here is LR may not have the right address because when we
single step the instruction, it isn't executed yet, so the LR isn't
updated.  This patch fix this problem by decoding instruction, if the
instruction updates LR (BL and BLX), the next instruction address is
PC + INSN_SIZE, otherwise, get the address of next instruction from LR.

gdb:

2016-02-12  Yao Qi  <yao.qi@linaro.org>

	* arch/arm-linux.c (arm_linux_get_next_pcs_fixup): Calculate
	nextpc according to instruction.

gdb/testsuite:

2016-02-12  Yao Qi  <yao.qi@linaro.org>

	* gdb.arch/arm-single-step-kernel-helper.c: New.
	* gdb.arch/arm-single-step-kernel-helper.exp: New.
2016-02-12 15:58:56 +00:00
Yao Qi
ed443b61e1 [ARM] Fixup PC in software single step
When I exercise GDBserver software single step, I see the following
error, which has been already handled by GDB properly.

In GDBserver log, we can see, GDBserver tries to single step instruction
on 0xb6e0a6e4, and destination address is 0xffff0fe0,

 stop pc is 0xb6e0a6e4
 Writing f001f0e7 to 0xffff0fe0 in process 7132
 Failed to insert breakpoint at 0xffff0fe0 (Input/output error).
 Failed to insert breakpoint at 0xffff0fe0 (-1).

(gdb) disassemble __aeabi_read_tp,+8
Dump of assembler code from 0xb6e0a6e0 to 0xb6e0a6e8:
   0xb6e0a6e0 <__aeabi_read_tp+0>:	mvn	r0, #61440	; 0xf000
   0xb6e0a6e4 <__aeabi_read_tp+4>:	sub	pc, r0, #31

however, it fails inserting breakpoint there.  This problem has already
fixed by GDB, see comments in arm-linux-tdep.c:arm_linux_software_single_step

      /* The Linux kernel offers some user-mode helpers in a high page.  We can
	 not read this page (as of 2.6.23), and even if we could then we
	 couldn't set breakpoints in it, and even if we could then the atomic
	 operations would fail when interrupted.  They are all called as
	 functions and return to the address in LR, so step to there
	 instead.  */

so we need to do the same thing in GDB side as well.  This patch adds
a new field fixup in arm_get_next_pcs_ops, so that we can fix up PC
for arm-linux target.  In this way, both GDB and GDBserver can single
step instructions going to kernel helpers.

gdb:

2016-02-12  Yao Qi  <yao.qi@linaro.org>

	* arch/arm-get-next-pcs.c (arm_get_next_pcs): Call
	self->ops->fixup if it isn't NULL.
	* arch/arm-get-next-pcs.h: Include gdb_vecs.h.
	(struct arm_get_next_pcs_ops) <fixup>: New field.
	* arch/arm-linux.c: Include common-regcache.h and
	arch/arm-get-next-pcs.h.
	(arm_linux_get_next_pcs_fixup): New function.
	* arch/arm-linux.h (arm_linux_get_next_pcs_fixup): Declare.
	* arm-linux-tdep.c (arm_linux_get_next_pcs_ops): Initialize
	it with arm_linux_get_next_pcs_fixup.
	(arm_linux_software_single_step): Move code to
	arm_linux_get_next_pcs_fixup.
	* arm-tdep.c (arm_get_next_pcs_ops): Initialize it.

gdb/gdbserver:

2016-02-12  Yao Qi  <yao.qi@linaro.org>

	* linux-arm-low.c (get_next_pcs_ops): Initialize it with
	arm_linux_get_next_pcs_fixup.
2016-02-12 15:58:52 +00:00
Marcin Kościelnicki
020ecd38e7 gdb.trace: Deduplicate write_inferior_data_ptr.
This function is now basically identical to write_inferior_data_pointer,
remove it and change all references.

gdb/gdbserver/ChangeLog:

	* tracepoint.c (x_tracepoint_action_download): Change
	write_inferior_data_ptr to write_inferior_data_pointer.
	(cmd_qtstart): Likewise.
	(write_inferior_data_ptr): Remove.
	(download_agent_expr): Change write_inferior_data_ptr to
	write_inferior_data_pointer.
	(download_tracepoint_1): Likewise.
	(download_tracepoint): Likewise.
	(download_trace_state_variables): Likewise.
2016-02-12 12:35:14 +01:00
Marcin Kościelnicki
d21b5f15d9 gdb: Fix build failure in xml-tdesc.c without expat.
Introduced by 18d3cec54e.

gdb/ChangeLog:

	* xml-tdesc.c (target_fetch_description_xml) [!HAVE_LIBEXPAT]: Warn
	and return NULL.
2016-02-12 11:21:00 +01:00
Markus Metzger
33b4777ca1 btrace, frame: fix crash in get_frame_type
In skip_artificial_frames we repeatedly call get_prev_frame_always until we get
a non-inline and non-tailcall frame assuming that there must be such a frame
eventually.

For record targets, however, we may have a frame chain that consists only of
artificial frames.  This leads to a crash in get_frame_type when dereferencing a
NULL frame pointer.

Change skip_artificial_frames and skip_tailcall_frames to return NULL in such a
case and modify each caller to cope with a NULL return.

In frame_unwind_caller_pc and frame_unwind_caller_arch, we simply assert that
the returned value is not NULL.  Their caller was supposed to check
frame_unwind_caller_id before calling those functions.

In other cases, we thrown an error.

In infcmd further move the skip_tailcall_frames call to the forward-stepping
case since we don't need a frame for reverse execution and we don't want to fail
because of that.  Reverse-finish does make sense for a tailcall frame.

gdb/
	* frame.h (skip_tailcall_frames): Update comment.
	* frame.c (skip_artificial_frames, skip_tailcall_frames): Return NULL
	if only	artificial frames are found.  Update comment.
	(frame_unwind_caller_id): Handle NULL return.
	(frame_unwind_caller_pc, frame_unwind_caller_arch): Assert that
	skip_artificial_frames does not return NULL.
	(frame_pop): Add an error if only tailcall frames are found.
	* infcmd.c (finish_command): Move skip_tailcall_frames call into forward-
	execution case.  Add an error if only tailcall frames are found.

testsuite/
	* gdb.btrace/tailcall-only.exp: New.
	* gdb.btrace/tailcall-only.c: New.
	* gdb.btrace/x86_64-tailcall-only.S: New.
	* gdb.btrace/i686-tailcall-only.S: New.
2016-02-12 09:49:48 +01:00
Markus Metzger
a038fa3e14 stack: check frame_unwind_caller_id
Callers of frame_unwind_caller_* functions are supposed to check
frame_unwind_caller_id.

Add such a check to frame_info and treat an invalid caller ID as if the caller
PC were not available.

gdb/
	* stack.c (frame_info): Check frame_unwind_caller_id.
2016-02-12 09:46:31 +01:00
Markus Metzger
2f3ef606b9 frame: add skip_tailcall_frames
Add a new function skip_tailcall_frames to skip TAILCALL_FRAME frames.

gdb/
	* frame.h (skip_tailcall_frames): New.
	* frame.c (skip_tailcall_frames): New.
	(frame_pop): Call skip_tailcall_frames.
	* infcmd.c (finish_command): Call skip_tailcall_frames.
2016-02-12 09:44:42 +01:00
GDB Administrator
95c00d15cb Automatic date update in version.in 2016-02-12 00:00:08 +00:00
H.J. Lu
ee5db48b40 Fix a typo in ld/ChangeLog 2016-02-11 15:37:00 -08:00
H.J. Lu
21a90cf1dd Add ChangeLog for PR ld/19615 fix 2016-02-11 15:24:33 -08:00
H.J. Lu
e20365c5d0 Enable -Bsymbolic and -Bsymbolic-functions to PIE
Before binutils 2.26, -Bsymbolic and -Bsymbolic-functions were also
applied to PIE so that "ld -pie -Bsymbolic -E" can be used to export
symbols in PIE with local binding.  This patch re-enables -Bsymbolic
and -Bsymbolic-functions for PIE.

	PR ld/19615
	* ld.texinfo: Document -Bsymbolic and -Bsymbolic-functions for
	PIE.
	* lexsup.c (parse_args): Enable -Bsymbolic and
	-Bsymbolic-functions for PIE.
	* testsuite/ld-i386/i386.exp: Run pr19175.
	* testsuite/ld-i386/pr19615.d: New file.
	* testsuite/ld-i386/pr19615.s: Likewise.
	* testsuite/ld-x86-64/pr19615.d: Likewise.
	* testsuite/ld-x86-64/pr19615.s: Likewise.
2016-02-11 15:20:13 -08:00
Wei-cheng Wang
7cae9051ed gdbserver: Remove tracepoint_action ops.
This patch removes 'ops' in tracepoint, and uses helper functions to
call action handler instead.

The object layout of tracepoint_action may differ in gdbserver and
inferior depend on the alignment rule of target ABI, so gdbserver cannot
simply copy the object from its memory to inferior memory.

For example,

  struct collect_memory_action
  {
    struct tracepoint_action base;
    {
      #ifndef IN_PROCESS_AGENT
      const struct tracepoint_action_ops *ops;
      #if
  -   char type;
  | }
  | ULONGEST addr;
  | ULONGEST len;
  - int32_t basereg;
  };

and on PowerPC,

     Wihtout ops           with ops
      0   1   2   3         0   1   2   3
   0 |type| PADDING...    0 |ops-------------|
   4 .................    4 |type|PADDING....|
   8 |addr------------    8 |addr-------------
   c ----------------|    c -----------------|
  10 |len-------------   10 |len--------------
  14 ----------------|   14 -----------------|
  18 |basereg--------|   18 |basereg---------|

so we cannot directly copy the object.

In this patch, 'ops' is removed in order to make the objects identical.

gdb/gdbserver/ChangeLog:

2016-02-11  Wei-cheng Wang  <cole945@gmail.com>
	    Marcin Kościelnicki  <koriakin@0x04.net>

	* tracepoint.c (struct tracepoint_action_ops): Remove.
	(struct tracepoint_action): Remove ops.
	(m_tracepoint_action_download, r_tracepoint_action_download)
	(x_tracepoint_action_download, l_tracepoint_action_download): Adjust
	size and offset accordingly.
	(m_tracepoint_action_ops, r_tracepoint_action_ops)
	(x_tracepoint_action_ops, l_tracepoint_action_ops): Remove.
	(tracepoint_action_send, tracepoint_action_download): New functions.
	Helpers for trace action handlers.
	(add_tracepoint_action): Remove setup actions ops.
	(download_tracepoint_1, tracepoint_send_agent): Call helper functions.
2016-02-11 23:21:48 +01:00
Pedro Alves
acc23c113a Add missing quotes to gdb/testsuite/README
gdb/testsuite/ChangeLog:
2016-02-11  Pedro Alves  <palves@redhat.com>

	* README (Parallel testing): Add missing double quotes.
2016-02-11 19:55:46 +00:00
Pedro Alves
e352bf0a3c Support 'make check-parallel' in gdb's build dir
Currently, you can cd to the gdb/testsuite/ dir and use
make check-parallel, instead of using FORCE_PARALLEL:

 $ make -j8 check-parallel RUNTESTFLAGS="--target_board=native-gdbserver"
 $ make -j8 check RUNTESTFLAGS="--target_board=native-gdbserver" FORCE_PARALLEL=1

But you can't do that in the build/gdb/ dir:

 $ make check-parallel RUNTESTFLAGS="--target_board=native-gdbserver"
 make: *** No rule to make target `check-parallel'.  Stop.

I find check-parallel a bit more convenient, and more typo-proof, so
this patch makes it work from the gdb build dir too.

While documenting this in testsuite/README, I found that the parallel
testing mode would better be pulled out to its own section and
extended.

gdb/ChangeLog:
2016-02-11  Pedro Alves  <palves@redhat.com>

	* Makefile.in (check-parallel): New rule.

gdb/testsuite/ChangeLog:
2016-02-11  Pedro Alves  <palves@redhat.com>

	* README (Parallel testing): New section.
	(GDB_PARALLEL): Rewrite.
	(FORCE_PARALLEL): Document.
2016-02-11 19:36:39 +00:00
Simon Marchi
bec2ab5a15 arm-tdep.c: Remove unused variables
Just a little bit of cleanup.

gdb/ChangeLog:

	* arm-tdep.c (arm_skip_prologue): Remove unused variables.
	(arm_analyze_prologue): Likewise.
	(arm_scan_prologue): Likewise.
	(arm_m_exception_prev_register): Likewise.
	(arm_copy_block_xfer): Likewise.
	(thumb2_copy_block_xfer): Likewise.
	(arm_decode_miscellaneous): Likewise.
	(arm_decode_ld_st_word_ubyte): Likewise.
	(arm_decode_svc_copro): Likewise.
	(thumb2_decode_svc_copro): Likewise.
	(thumb_copy_16bit_ldr_literal): Likewise.
	(thumb_copy_pop_pc_16bit): Likewise.
	(decode_thumb_32bit_ld_mem_hints): Likewise.
	(arm_show_force_mode): Likewise.
	(_initialize_arm_tdep): Likewise.
	(arm_record_strx): Likewise.
	(arm_record_extension_space): Likewise.
	(arm_record_data_proc_misc_ld_str): Likewise.
	(arm_record_exreg_ld_st_insn): Likewise.
	(arm_record_vfp_data_proc_insn): Likewise.
	(arm_record_coproc_data_proc): Likewise.
	(thumb_record_misc): Likewise.
	(thumb_record_ldm_stm_swi): Likewise.
	(thumb2_record_ld_st_dual_ex_tbb): Likewise.
	(thumb2_record_ld_mem_hints): Likewise.
	(thumb2_record_lmul_lmla_div): Likewise.
	(thumb2_record_asimd_struct_ld_st): Likewise.
	(arm_process_record): Likewise.
2016-02-11 14:09:25 -05:00
Simon Marchi
2ba163c8d1 arm-tdep.c: Remove unused arm_displaced_step_copy_insn
This function is never used, since it is superseded by
arm_linux_displaced_step_copy_insn.

gdb/ChangeLog:

	* arm-tdep.c (arm_displaced_step_copy_insn): Remove.
	(ARM displaced stepping support): Remove reference to
	arm_displaced_step_copy_insn in comment.
	* arm-tdep.h (arm_displaced_step_copy_insn): Remove.
	* arm-linux-tdep.c (arm_linux_displaced_step_copy_insn): Remove
	reference to arm_displaced_step_copy_insn in comment.
2016-02-11 14:08:53 -05:00
Simon Marchi
615234c107 arm-tdep.c: Change type of insn parameters
Almost obvious... change the type of some insn parameters, so that it
matches the rest of the code.

gdb/ChangeLog:

	* arm-tdep.c (thumb_copy_unmodified_16bit): Change type of insn.
	(thumb_copy_b): Likewise.
	(arm_decode_b_bl_ldmstm): Likewise.
	(thumb_copy_16bit_ldr_literal): Likewise.
	(thumb_copy_pop_pc_16bit): Likewise.
2016-02-11 13:21:32 -05:00
Han Shen
e3dbf58233 Remove info message for every erratum 843419 found and fixed.
2016-02-11 Rahul Chaudhry  <rahulchaudhry@google.com>

	* aarch64.cc (Target_aarch64::scan_erratum_843419_span):
	Remove info message for every erratum 843419 found and fixed.
2016-02-11 09:47:49 -08:00
Nick Clifton
bd5608dcc6 Allow the .cfi_sections directive to be reissued provided that CFI generation has not yet started.
PR gas/19614
	* dw2gencfi.c (cfi_sections_set): Delay setting this variable
	until it is actually used.
	(cfi_set_sections): Set cfi_sections_set to true.
	(dot_cfi_startproc): Likewise.
	(dot_cfi_endproc): Likewise.
	(dot_cfi_fde_data): Likewise.
	(cfi_finish): Likewise.
	(dot_cfi_sections): Do not set cfi_sections_set.
	* doc/as.texinfo (.cfi_sections): Note that targets can provide
	their own cfi section name.  Also note that the directive can be
	reissued provided that CFI generation has not started.
	* testsuite/gas/mips/compact-eh-err2.s: Add .cfi_startproc and
	.cfi_endproc directives so that the redefinition of .cfi_sections
	will trigger the generation of the error message.
	* testsuite/gas/mips/compact-eh-err2.l: Update expected line
	number of error message.
2016-02-11 15:30:55 +00:00
Marcin Kościelnicki
9f5fed7852 gdb.trace: Add a testcase for tdesc in tfile.
This tests whether $ymm15 can be correctly collected and printed from
tfile.  It covers:

- storing tdesc in tfile (without that, $ymm15 doesn't exist)
- ax_pseudo_register_collect for x86 (without that, $ymm15 cannot be
  collected)
- register order in tfile_fetch_registers (without that, $ymm15h is
  fetched from wrong position)
- off-by-one in tfile_fetch_registers (without that, $ymm15h is
  incorrectly considered to be out of bounds)
- using proper tdesc in encoding tracepoint actions (without that,
  internal error happens due to $ymm15h being considered unavailable)

gdb/testsuite/ChangeLog:

	* gdb.trace/tfile-avx.c: New test.
	* gdb.trace/tfile-avx.exp: New test.
2016-02-11 15:16:31 +01:00
Antoine Tremblay
82e9becd8a Use the target architecture when encoding tracepoint actions
This patch uses the target architecture rather then the objfile
architecture when encoding tracepoint actions.

The target architecture may contain additional registers. E.g. ARM VFP
registers. This information is needed to allow their collection. Since we
can never know whether the registers numbers in the target match the
binary's we have to use tdesc here.

One note about combined debuggers / multi-inferior from Pedro Alves:

In the combined debugger case taking Cell as the practical example that
gdb supports currently:

In that case, the main target_gdbarch() will be powerpc, but you may have set a
tracepoint on _spu_ code, which has a different gdbarch.  so for that case,
target_gdbarch would be wrong.  I think that in that case, we'd need to
find __the_ target/tdesc gdbarch that is (bfd) compatible with the
objfile's gdbarch.

I think cell/spu gdbserver doesn't support tracepoints, so we can ignore
this for now.

The multi-inferior/process case is somewhat related, but its simpler.
each inferior has its own gdbarch.

That is, target_gdbarch depends on the current inferior selected.
In fact, that just returns inferior->gdbarch nowaways.

No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }

gdb/ChangeLog:

	* tracepoint.c (encode_actions_1): Use target_gdbarch () rather
	than loc->gdbarch.
2016-02-11 08:14:35 -05:00
H.J. Lu
32875eb1f3 Mask off the least significant bit in GOT offset
The least significant bit in GOT offset is to record whether we have
initialized the GOT entry in R_386_GOT32 processing.  We need to mask
it off for R_386_GOT32X.

	PR ld/19601
	* elf32-i386.c (elf_i386_relocate_section): Mask off the least
	significant bit in GOT offset for R_386_GOT32X.
2016-02-10 19:33:52 -08:00
GDB Administrator
cd7c1b9a7e Automatic date update in version.in 2016-02-11 00:00:14 +00:00
Marcin Kościelnicki
5ac87a997f gdb.trace: Read XML target description from tfile.
gdb/ChangeLog:

	* tracefile-tfile.c (trace_tdesc): New static variable.
	(tfile_open): Clear trace_tdesc, call target_find_description.
	(tfile_interp_line): Recognize tdesc lines.
	(tfile_close): Clear trace_tdesc.
	(tfile_xfer_partial_features): New function.
	(tfile_xfer_partial): Call tfile_xfer_partial_features.
	(tfile_append_tdesc_line): New function.
2016-02-10 23:31:13 +01:00
Marcin Kościelnicki
18d3cec54e gdb.trace: Save XML target description in tfile.
gdb/ChangeLog:

	* ctf.c (ctf_write_tdesc): New function.
	(ctf_write_ops): Wire in ctf_write_tdesc.
	* tracefile-tfile.c (tfile_write_tdesc): New function.
	(tfile_write_ops): Wire in tfile_write_tdesc.
	* tracefile.c (trace_save): Call write_tdesc method.
	* tracefile.h (struct trace_file_write_ops): Add write_tdesc method.
	* xml-tdesc.c (target_fetch_description_xml): New function.
	* xml-tdesc.h: Add target_fetch_description_xml prototype.
2016-02-10 23:31:11 +01:00
Yao Qi
9f6a71b4bf Clear *VAL in regcache_raw_read_unsigned
We have function regcache_raw_read_unsigned defined in both GDB and
GDBserver, so that it is used in common like this,

  ULONGEST value;
  status = regcache_raw_read_unsigned (regcache, regnum, &value);

'value' is correctly set in GDB side, but may not be correctly set
in GDBserver, because &value is passed in regcache_raw_read_unsigned
but collect_register may only set part of the whole variable.  In my
test, I see the top half of 'value' is garbage.  This patch fixes this
problem by clearing *VAL before calling collect_register.

gdb/gdbserver:

2016-02-10  Yao Qi  <yao.qi@linaro.org>

	* regcache.c (regcache_raw_read_unsigned): Clear *VAL.
2016-02-10 16:40:52 +00:00
Simon Marchi
550dc4e266 arm-tdep.c: Fix typo
unpriveleged -> unprivileged

gdb/ChangeLog:

	* arm-tdep.c (arm_copy_extra_ld_st): Fix "unpriveleged" typo.
	(arm_decode_dp_misc): Likewise.
2016-02-10 10:10:18 -05:00
Marcin Kościelnicki
62e5fd57bc gdb/x86: Implement ax_pseudo_register_collect hook.
Makes "collect $ymm15" action work.

gdb/ChangeLog:

	* amd64-tdep.c (amd64_ax_pseudo_register_collect): New function.
	(amd64_init_abi): Fill ax_pseudo_register_collect hook.
	* gdb/i386-tdep.c (i386_pseudo_register_read_into_value): Remove
	misleading comment.
	(i386_pseudo_register_write): Ditto.
	(i386_ax_pseudo_register_collect): New function.
	(i386_gdbarch_init): Fill ax_pseudo_register_collect hook.
	* i386-tdep.h: Add i386_ax_pseudo_register_collect prototype.
2016-02-10 15:30:31 +01:00
Marcin Kościelnicki
e909d859f5 gdb.trace: Use g packet order in tfile_fetch_registers.
tfile_fetch_registers currently wrongly fetches registers using
gdb order instead of g packet order.  On x86_64 with AVX, this causes
problems with ymm*h and orig_rax registers: gdb has ymm*h first, while
g packet has orig_rax first.

gdb/ChangeLog:

	* tracefile-tfile.c (tfile_fetch_registers): Use g packet order
	instead of gdb order.

gdb/doc/ChangeLog:

	* gdb.texinfo (Trace File Format): Remove misleading information
	about register block ordering.
2016-02-10 15:30:13 +01:00
Marcin Kościelnicki
473b99e572 gdb.trace: Fix off-by-one in tfile_fetch_registers.
This resulted in the last register being considered unavailable.
On plain x86_64 (without AVX), this happened to be orig_rax.

gdb/ChangeLog:

	* tracefile-tfile.c (tfile_fetch_registers): Fix off-by-one in bounds
	check.
2016-02-10 14:50:22 +01:00
Claudiu Zissulescu
4670103e86 Add support for ARC instruction relaxation in the assembler.
gas/
2016-01-26  Claudiu Zissulescu  <claziss@synopsys.com>
	    Janek van Oirschot <jvanoirs@synopsys.com>

        * config/tc-arc.h (TC_FRAG_TYPE, TC_PCREL_ADJUST, MAX_INSN_ARGS)
        (MAX_INSN_FLGS, MAX_FLAG_NAME_LENGHT, TC_GENERIC_RELAX_TABLE):
        Define.
        (arc_flags, arc_relax_type): New structure.
        * config/tc-arc.c (FRAG_MAX_GROWTH, RELAX_TABLE_ENTRY)
	(RELAX_TABLE_ENTRY_MAX): New define.
        (relaxation_state, md_relax_table, arc_relaxable_insns)
	(arc_num_relaxable_ins): New variable.
	(rlx_operand_type, arc_rlx_types): New enums.
	(arc_relaxable_ins): New structure.
        (OPTION_RELAX): New option.
        (arc_insn): New relax member.
        (arc_flags): Remove.
        (relax_insn_p): New function.
        (apply_fixups): Likewise.
        (relaxable_operand): Likewise.
        (may_relax_expr): Likewise.
        (relaxable_flag): Likewise.
        (arc_pcrel_adjust): Likewise.
        (md_estimate_size_before_relax): Implement.
        (md_convert_frag): Likewise.
        (md_parse_option): Handle new mrelax option.
        (md_show_usage): Likewise.
        (assemble_insn): Set relax member.
        (emit_insn0): New function.
        (emit_insn1): Likewise.
        (emit_insn): Handle relaxation case.
	* NEWS: Mention the new relaxation option.
	* doc/c-arc.texi (ARC Options): Document new mrelax option.

gas/testsuite
2016-01-26  Claudiu Zissulescu  <claziss@synopsys.com>

        * gas/arc/relax-avoid1.d: New file.
        * gas/arc/relax-avoid1.s: Likewise.
        * gas/arc/relax-avoid2.d: Likewise.
        * gas/arc/relax-avoid2.s: Likewise.
        * gas/arc/relax-avoid3.d: Likewise.
        * gas/arc/relax-avoid3.s: Likewise.
	* gas/arc/relax-b.d: Likewise.
        * gas/arc/relax-b.s: Likewise.

include/opcode/
2016-01-26  Claudiu Zissulescu  <claziss@synopsys.com>
	    Janek van Oirschot  <jvanoirs@synopsys.com>

        * arc.h (arc_opcode arc_relax_opcodes, arc_num_relax_opcodes):
        Declare.

opcodes/
2016-01-26  Claudiu Zissulescu  <claziss@synopsys.com>
	    Janek van Oirschot  <jvanoirs@synopsys.com>

        * arc-opc.c (arc_relax_opcodes, arc_num_relax_opcodes): New
        variable.
2016-02-10 12:09:01 +00:00
Nick Clifton
83da6e748c Correct assertion in NIOS2 linker to allow signed 16-buit immediate values.
PR 19405
	* elf32-nios2.c (nios2_elf32_install_imm16): Allow for signed
	immediate values.
	* elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): Limit the
	number of messages about FDE encoding preventing .eh_frame_hdr
	generation.
2016-02-10 11:25:59 +00:00
Nick Clifton
52cf9762c5 Sync top level files with gcc.
Import these patches from the GCC mainline:

	2016-01-12  Andris Pavenis  <andris.pavenis@iki.fi>

	* configure.ac: Enable LTO for DJGPP
	* configure: Regenerate

	2016-01-24  Mikhail Maltsev  <maltsevm@gmail.com>

	PR bootstrap/69329
	* Makefile.tpl (BASE_FLAGS_TO_PASS): Add LSAN_OPTIONS.
	* Makefile.in: Regenerate.

	2016-01-25  Aditya Kumar  <aditya.k7@samsung.com>
	            Sebastian Pop  <s.pop@samsung.com>

	* Makefile.in: Regenerate.
	* Makefile.tpl: Export ISLVER.
	* configure: Regenerate.
	* config/isl.m4: Detect isl-0.15.

	2016-01-29  Sebastian Pop  <s.pop@samsung.com>

	* config/isl.m4: Add comments about isl-0.16.
	* configure: Regenerate.
2016-02-10 10:54:29 +00:00
Joel Brobecker
1233c0bae6 Update NEWS post GDB 7.11 branch creation.
gdb/ChangeLog:

	* NEWS: Create a new section for the next release branch.
	Rename the section of the current branch, now that it has
	been cut.
2016-02-10 07:28:01 +04:00
Joel Brobecker
d1dc094269 Bump version to 7.11.50.DATE-git.
Now that the GDB 7.11 branch has been created, we can
bump the version number.

gdb/ChangeLog:

	GDB 7.11 branch created (9ef9e6a6a0):
	* version.in: Bump version to 7.11.50.DATE-git.
2016-02-10 07:20:26 +04:00
Keith Seitz
9ef9e6a6a0 breakpoints/19546: Fix crash after updating breakpoints
One of the last checks update_breakpoints_after_exec does while looping
over the list of breakpoints is check that the breakpoint has a valid
location spec. It uses event_location_empty_p to check if the location spec
is "empty", and if it is, the breakpoint is deleted.

momentary_breakpoint types rely on setting the breakpoint structure's
location spec to NULL, thereby causing an update to delete the breakpoint.
However, event_location_empty_p assumed that locations were never NULL.
As a result, GDB would crash dereferencing a NULL pointer whenever
update_breakpoints_after_exec would encounter a momentary_breakpoint.

This patch creates a new wrapper/helper function which tests that the given
breakpoint's location spec is non-NULL and if it is not "empty"
or "unspecified."

gdb/ChangeLog

	PR breakpoints/19546
	* breakpoint.c (breakpoint_event_location_empty_p): New function.
	(update_breakpoints_after_exec, bkpt_re_set): Use this new function
	instead of event_location_empty_p.

gdb/testsuite/ChangeLog

	PR breakpoints/19546
	* gdb.base/infcall-exec.c: New file.
	* gdb.base/infcall-exec2.c: New file.
	* gdb.base/infcall-exec.exp: New file.
2016-02-09 16:04:45 -08:00
GDB Administrator
224c1b2068 Automatic date update in version.in 2016-02-10 00:00:21 +00:00
Keith Seitz
39a67dc4f7 Enable/update legacy linespecs in MI.
MI is currently using string_to_event_location to enable the use of legacy
linespecs, but using this function (until this patchset) had the (as yet
unnoticed) side effect of allowing both MI and CLI representation for
explicit locations.

This patch simply changes MI to use the same legacy linespec functions
that the python and guile interpreters use.  This eliminates the CLI syntax
for explicit locations (in MI).

gdb/ChangeLog

	* mi/mi-cmd-break.c (mi_cmd_break_insert_1): Use
	string_to_event_location_basic instead of string_to_event_location.
2016-02-09 14:31:04 -08:00
Keith Seitz
a96e36da2f Use string_to_event_location_basic in guile.
This patch, analogous to the previous python patch, implements proper
legacy linespec support in guile code using the newly introduced
string_to_event_location_basic.

gdb/ChangeLog

	* guile/scm-breakpoint.c (gdbscm_register_breakpoint_x): Skip
	leading whitespace and use string_to_event_location_basic instead
	of new_linespec_location.

gdb/testsuite/ChangeLog

	* gdb.guile/scm-breakpoint.exp (test_bkpt_address): New procedure.
	(toplevel): Call test_bkpt_address.
2016-02-09 14:29:21 -08:00
Keith Seitz
9f61929fd8 python/19506 -- gdb.Breakpoint address location regression
Now that "legacy" linespecs benefit from consolidated support in
string_to_event_location_basic, python's Breakpoint command should use this
function to turn strings into event locations.

As a result, this patch fixes python/19506. Before:

(gdb) python gdb.Breakpoint("*main")
Traceback (most recent call last):
  File "<string>", line 1, in <module>
RuntimeError: Function "*main" not defined.
Error while executing Python code.

After:

(gdb) python gdb.Breakpoint("*main")
Breakpoint 1 at 0x4005fb: file ../../../src/gdb/testsuite/gdb.python/py-breakpoint.c, line 32.

gdb/ChangeLog

	PR python/19506
	* python/py-breakpoint.c (bppy_init): Use
	string_to_event_location_basic instead of new_linespec_location.

gdb/testsuite/ChangeLog

	PR python/19506
	* gdb.python/py-breakpoint.exp (test_bkpt_address): New procedure.
	(toplevel): Call test_bkpt_address.
2016-02-09 14:27:50 -08:00
Keith Seitz
eeb1af437c Refactor string_to_event_location for legacy linespec support.
This patch refactors string_to_event_location, breaking it into two
separate functions:

1) string_to_event_location_basic
A "basic" string parser that implements support for "legacy" linespecs
(linespec, address, and probe locations).  This function is intended to
be used by any UI wishing/needing to support this legacy behavior.

2) string_to_event_location
This is now intended as a CLI-only function which adds explicit location
parsing in a CLI-appropriate manner (in the form of traditional option/value
pairs).

Together these patches serve to simplify string-to-event location parsing
for all existing non-CLI interfaces (MI, guile, and python).

gdb/ChangeLog

	* location.c (string_to_explicit_location): Note that "-p" is
	reserved for probe locations and return NULL for any input
	that starts with that.
	(string_to_event_location): Move "legacy" linespec code to ...
	(string_to_event_location_basic): ... here.
	* location.h (string_to_event_location): Update comment.
	(string_to_event_location_basic): New function.
2016-02-09 10:02:53 -08:00
Nick Clifton
609332f15c Fix compile time warnings building the binutils with a gcc6 compiler.
include	* opcode/metag.h (metag_scondtab): Mark as possibly unused.
	* opcode/nds32.h (nds32_r45map): Likewise.
	(nds32_r54map): Likewise.
	* opcode/visium.h (gen_reg_table): Likewise.
	(fp_reg_table, cc_table, opcode_table): Likewise.

bfd	* oasys.c (oasys_archive_p): Fix indentation.
	* elf32-nds32.c (nds32_elf_relax_section): Use an unsigned
	constant for left shifting.
2016-02-09 16:34:24 +00:00
Simon Marchi
1e94266c4d Modernize configure.ac's
Using AC_OUTPUT with arguments has been deprecated for some time in
autoconf, even in version 2.64, which we are using.  This change should
not affect functionality.

I also removed the "exit 0"'s, they shouldn't be necessary.

gdb/ChangeLog:

	* configure.ac: Use AC_CONFIG_FILES instead of passing arguments
	to AC_OUTPUT.  Remove "exit 0" at the end.
	* configure: Regenerate.

gdb/testsuite/ChangeLog:

	* configure.ac: Use AC_CONFIG_FILES instead of passing arguments
	to AC_OUTPUT.
	* configure: Regenerate.

gdb/gdbserver/ChangeLog:

	* configure.ac: Use AC_CONFIG_FILES instead of passing arguments
	to AC_OUTPUT.
	* configure: Regenerate.
2016-02-09 09:01:58 -05:00
Pedro Alves
2a7f3dffce Fix PR19548: Breakpoint re-set inserts breakpoints when it shouldn't
PR19548 shows that we still have problems related to 13fd3ff343:

 [PR17431: following execs with "breakpoint always-inserted on"]
 https://sourceware.org/ml/gdb-patches/2014-09/msg00733.html

The problem this time is that we currently update the global location
list and try to insert breakpoint locations after re-setting _each_
breakpoint in turn.

Say:

 - We have _more_ than one breakpoint set.  Let's assume 2.

 - There's a breakpoint with a pre-exec address that ends up being an
   unmapped address after the exec.

 - That breakpoint is NOT the first in the breakpoint list.

Then when handling an exec, and we re-set the first breakpoint in the
breakpoint list, we mistakently try to install the old pre-exec /
un-re-set locations of the other breakpoint, which fails:

 (gdb) continue
 Continuing.
 process 28295 is executing new program: (...)/execl-update-breakpoints2
 Error in re-setting breakpoint 1: Warning:
 Cannot insert breakpoint 2.
 Cannot access memory at address 0x1000764

 Breakpoint 1, main (argc=1, argv=0x7fffffffd368) at /home/pedro/gdb/mygit/src/gdb/testsuite/gdb.base/execl-update-breakpoints.c:34
 34        len = strlen (argv[0]);
 (gdb)

Fix this by deferring the global location list update till after all
breakpoints are re-set.

Tested on x86_64 Fedora 20, native and gdbserver.

gdb/ChangeLog:
2016-02-09  Pedro Alves  <palves@redhat.com>

	PR breakpoints/19548
	* breakpoint.c (create_overlay_event_breakpoint): Don't update
	global location list here.
	(create_longjmp_master_breakpoint)
	(create_std_terminate_master_breakpoint)
	(create_exception_master_breakpoint, create_jit_event_breakpoint)
	(update_breakpoint_locations):
	(breakpoint_re_set): Update global location list after all
	breakpoints are re-set.

gdb/testsuite/ChangeLog:
2016-02-09  Pedro Alves  <palves@redhat.com>

	PR breakpoints/19548
	* gdb.base/execl-update-breakpoints.c (some_function): New
	function.
	(main): Call it.
	* gdb.base/execl-update-breakpoints.exp: Add a second breakpoint.
	Tighten expected GDB output.
2016-02-09 12:12:17 +00:00
Simon Marchi
8adce0342f Fix siginfo C++ build error
Change the signature of gdbserver's siginfo_fixup functions so that it's
in line with gdb's.  This gets rid of the following build error in C++:

  /home/emaisin/src/binutils-gdb/gdb/gdbserver/linux-x86-low.c: In function ‘int x86_siginfo_fixup(siginfo_t*, void*, int)’:
  /home/emaisin/src/binutils-gdb/gdb/gdbserver/linux-x86-low.c:694:21: error: invalid conversion from ‘void*’ to ‘gdb_byte* {aka unsigned char*}’ [-fpermissive]
               FIXUP_32);
                       ^
  In file included from /home/emaisin/src/binutils-gdb/gdb/gdbserver/linux-x86-low.c:31:0:
  /home/emaisin/src/binutils-gdb/gdb/gdbserver/../nat/amd64-linux-siginfo.h:52:5: error:   initializing argument 2 of ‘int amd64_linux_siginfo_fixup_common(siginfo_t*, gdb_byte*, int, amd64_siginfo_fixup_mode)’ [-fpermissive]
   int amd64_linux_siginfo_fixup_common (siginfo_t *native, gdb_byte *inf,
       ^
  /home/emaisin/src/binutils-gdb/gdb/gdbserver/linux-x86-low.c:698:20: error: invalid conversion from ‘void*’ to ‘gdb_byte* {aka unsigned char*}’ [-fpermissive]
             FIXUP_X32);
                      ^
  In file included from /home/emaisin/src/binutils-gdb/gdb/gdbserver/linux-x86-low.c:31:0:
  /home/emaisin/src/binutils-gdb/gdb/gdbserver/../nat/amd64-linux-siginfo.h:52:5: error:   initializing argument 2 of ‘int amd64_linux_siginfo_fixup_common(siginfo_t*, gdb_byte*, int, amd64_siginfo_fixup_mode)’ [-fpermissive]
   int amd64_linux_siginfo_fixup_common (siginfo_t *native, gdb_byte *inf,
       ^

gdb/gdbserver/ChangeLog:

	* linux-aarch64-low.c (aarch64_linux_siginfo_fixup): Change
	void * to gdb_byte *.
	* linux-low.c (siginfo_fixup): Likewise.
	(linux_xfer_siginfo): Likewise.
	* linux-low.h (struct linux_target_ops) <siginfo_fixup>:
	Likewise.
	* linux-x86-low.c (x86_siginfo_fixup): Likewise.
2016-02-09 11:18:15 +00:00
Nick Clifton
027e9c750c Add a more helpful warning message to explain why some AArch64 relocations can overflow.
bfd	* elfnn-aarch64.c (elfNN_aarch64_relocate_section): Add a more
	helpful warning message to explain why certain AArch64 relocs
	might overflow.

ld	* testsuite/ld-aarch64/reloc-overflow-bad.d: New test.
	* testsuite/ld-aarch64/reloc-overflow-1.s: New source file.
	* testsuite/ld-aarch64/reloc-overflow-2.s: New source file.
	* testsuite/ld-aarch64/aarch64-elf.exp: Run the new test.
2016-02-09 10:47:54 +00:00
Walfred Tedeschi
c23bbc1cda Revert "Fix build breakage"
This reverts commit 222cab58b7.
2016-02-09 11:36:54 +01:00