binutils-gdb.git
7 years ago2017-06-15 Eric Christopher <echristo@gmail.com>
Eric Christopher [Fri, 16 Jun 2017 01:46:17 +0000 (18:46 -0700)]
2017-06-15  Eric Christopher  <echristo@gmail.com>

        * aarch64.cc: Fix a few typos and grammar-os.

7 years agoAutomatic date update in version.in
GDB Administrator [Fri, 16 Jun 2017 00:00:27 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoCorrect "ld --help" to display "-z stack-size=SIZE"
H.J. Lu [Thu, 15 Jun 2017 19:30:53 +0000 (12:30 -0700)]
Correct "ld --help" to display "-z stack-size=SIZE"

ELF Linker command line option to set stack size is "-z stack-size=SIZE",
not "-z stacksize=SIZE".

* exsup.c (elf_shlib_list_options): Display "-z stack-size=SIZE"
instead of "-z stacksize=SIZE".

7 years ago[AArch64] Allow COPY relocation elimination
Jiong Wang [Thu, 15 Jun 2017 15:51:01 +0000 (16:51 +0100)]
[AArch64] Allow COPY relocation elimination

  As discussed at the PR, this patch tries to avoid COPY relocation generation
and propagate the original relocation into runtime if it was relocating on
writable section.  The ELIMINATE_COPY_RELOCS has been set to true and it's
underlying infrastructure has been improved so that the COPY reloc elimination
at least working on absoluate relocations (ABS64) on AArch64.

  BFD linker copy relocation elimination framwork requires the backend to always
allocate dynrelocs for all those relocation types that are possible to introduce
copy relocations.  This is for adjust_dynamic_symbol hook to be able to get all
symbol reference information.  Should one symbol is referenced by more than one
relocations, if there is any of them needs copy relocation then linker should
generate it.

bfd/
PR ld/21532
* elfnn-aarch64.c (ELIMINATE_COPY_RELOCS): Set to 1.
(elfNN_aarch64_final_link_relocate): Also propagate relocations to
runtime for if there needs copy relocation elimination.
(need_copy_relocation_p): New function.  Return true for symbol with
pc-relative references and if it's against read-only sections.
(elfNN_aarch64_adjust_dynamic_symbol): Use need_copy_relocation_p.
(elfNN_aarch64_check_relocs): Allocate dynrelocs for relocation types
that are related with accessing external objects.
(elfNN_aarch64_gc_sweep_hook): Sync the relocation types with the change
in elfNN_aarch64_check_relocs.

ld/
* testsuite/ld-aarch64/copy-reloc-exe-2.s: New test source file.
* testsuite/ld-aarch64/copy-reloc-2.d: New test.
* testsuite/ld-aarch64/copy-reloc-exe-eliminate.s: New test source file.
* testsuite/ld-aarch64/copy-reloc-eliminate.d: New test.
* testsuite/ld-aarch64/copy-reloc-so.s: Define new global objects.
* testsuite/ld-aarch64/aarch64-elf.exp: Run new tests.

7 years agoi386-dis: Add 2 tests with invalid bnd register
H.J. Lu [Thu, 15 Jun 2017 15:21:48 +0000 (08:21 -0700)]
i386-dis: Add 2 tests with invalid bnd register

PR binutils/21594
* testsuite/gas/i386/mpx.s: Add 2 tests with invalid bnd
register.
* testsuite/gas/i386/x86-64-mpx.s: Likewise.
* testsuite/gas/i386/mpx.d: Updated.
* testsuite/gas/i386/x86-64-mpx.d: Likewise.

7 years agoi386-dis: Check valid bnd register
H.J. Lu [Thu, 15 Jun 2017 13:40:17 +0000 (06:40 -0700)]
i386-dis: Check valid bnd register

Since there are only 4 bnd registers, return "(bad)" for register
number > 3.

PR binutils/21594
* i386-dis.c (OP_E_register): Check valid bnd register.
(OP_G): Likewise.

7 years agoPrevent address violation problem when disassembling corrupt aarch64 binary.
Nick Clifton [Thu, 15 Jun 2017 12:26:54 +0000 (13:26 +0100)]
Prevent address violation problem when disassembling corrupt aarch64 binary.

PR binutils/21595
* aarch64-dis.c (aarch64_ext_ldst_reglist): Check for an out of
range value.

7 years agoFix address violation parsing a corrupt ieee binary.
Nick Clifton [Thu, 15 Jun 2017 12:08:47 +0000 (13:08 +0100)]
Fix address violation parsing a corrupt ieee binary.

PR binutils/21581
(ieee_archive_p): Use a static buffer to avoid compiler bugs.

7 years agoAvoid a possible compiler bug by using a static buffer instead of a stack local buffer.
Nick Clifton [Thu, 15 Jun 2017 11:44:23 +0000 (12:44 +0100)]
Avoid a possible compiler bug by using a static buffer instead of a stack local buffer.

PR binutils/21582
* ieee.c (ieee_object_p): Use a static buffer to avoid compiler
bugs.

7 years agoFix address violation when disassembling a corrupt RL78 binary.
Nick Clifton [Thu, 15 Jun 2017 11:37:01 +0000 (12:37 +0100)]
Fix address violation when disassembling a corrupt RL78 binary.

PR binutils/21588
* rl78-decode.opc (OP_BUF_LEN): Define.
(GETBYTE): Check for the index exceeding OP_BUF_LEN.
(rl78_decode_opcode): Use OP_BUF_LEN as the length of the op_buf
array.
* rl78-decode.c: Regenerate.

7 years agoHandle EITR records in VMS Alpha binaries with overlarge command length parameters.
Nick Clifton [Thu, 15 Jun 2017 11:08:57 +0000 (12:08 +0100)]
Handle EITR records in VMS Alpha binaries with overlarge command length parameters.

PR binutils/21579
* vms-alpha.c (_bfd_vms_slurp_etir): Extend check of cmd_length.

7 years agoPrevent invalid array accesses when disassembling a corrupt bfin binary.
Nick Clifton [Thu, 15 Jun 2017 10:52:02 +0000 (11:52 +0100)]
Prevent invalid array accesses when disassembling a corrupt bfin binary.

PR binutils/21586
* bfin-dis.c (gregs): Clip index to prevent overflow.
(regs): Likewise.
(regs_lo): Likewise.
(regs_hi): Likewise.

7 years ago[GOLD] Don't install branch-to-stub for TLS relaxed ERRATUM 843419 sequences on AArch64
Jiong Wang [Thu, 15 Jun 2017 09:35:28 +0000 (10:35 +0100)]
[GOLD] Don't install branch-to-stub for TLS relaxed ERRATUM 843419 sequences on AArch64

TLS relaxation may change erratum 843419 sequences that those offending ADRP
instructions actually transformed into other instructions in which case there
is erratum 843419 risk anymore that we should avoid installing unnecessary
branch-to-stub.

gold/
        * aarch64.cc (Insn_utilities::is_mrs_tpidr_el0): New method.
        (AArch64_relobj<size, big_endian>::try_fix_erratum_843419_optimized):
        Return ture for some TLS relaxed sequences.

7 years agoPR gdb/21574: Mention $SHELL and startup-with-shell on "help run"
Sergio Durigan Junior [Wed, 14 Jun 2017 20:45:20 +0000 (16:45 -0400)]
PR gdb/21574: Mention $SHELL and startup-with-shell on "help run"

This simple patch updates the documentation of "help run" in order to
mention that the shell used to start the inferior comes from the
$SHELL environment variable.  It also mentions that this behaviour can
be disabled by using the "set startup-with-shell off" command.

gdb/ChangeLog:
2017-06-14  Sergio Durigan Junior  <sergiodj@redhat.com>

PR gdb/21574
* infcmd.c (_initialize_infcmd): Expand "help run" documentation
to mention $SHELL and startup-with-shell.

7 years agoAutomatic date update in version.in
GDB Administrator [Thu, 15 Jun 2017 00:00:48 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoxtensa: don't expect XCHAL_* macros to be constant
Max Filippov [Wed, 17 May 2017 09:09:14 +0000 (02:09 -0700)]
xtensa: don't expect XCHAL_* macros to be constant

Get rid of the assumption that XCHAL_* macros are preprocessor
constants: don't use them in preprocessor conditionals or in static
variable initializers.

2017-06-14  Max Filippov  <jcmvbkbc@gmail.com>
bfd/
* elf32-xtensa.c (elf_xtensa_be_plt_entry,
elf_xtensa_le_plt_entry): Add dimension for the ABI to arrays,
keep both windowed and call0 ABI PLT definitions.
(elf_xtensa_create_plt_entry): Use selected ABI to choose upper
elf_xtensa_*_plt_entry endex.
(ELF_MAXPAGESIZE): Fix at minimal supported MMU page size.

gas/
* config/tc-xtensa.c (density_supported, xtensa_fetch_width,
absolute_literals_supported): Leave definitions uninitialized.
(directive_state): Leave entries for directive_density and
directive_absolute_literals initialized to false.
(xg_init_global_config, xtensa_init): New functions.
* config/tc-xtensa.h (TARGET_BYTES_BIG_ENDIAN): Define as 0.
(HOST_SPECIAL_INIT): New definition.
(xtensa_init): New declaration.

7 years agoMaxim Grigoriev stepping down as Xtensa maintainer
Max Filippov [Tue, 13 Jun 2017 17:26:55 +0000 (10:26 -0700)]
Maxim Grigoriev stepping down as Xtensa maintainer

gdb/
2017-06-14  Max Filippov  <jcmvbkbc@gmail.com>

* MAINTAINERS: Move Maxim Grigoriev to the Past Maintainers.

7 years agoFix seg-fault when trying to disassemble a corrupt score binary.
Nick Clifton [Wed, 14 Jun 2017 16:10:28 +0000 (17:10 +0100)]
Fix seg-fault when trying to disassemble a corrupt score binary.

PR binutils/21576
* score7-dis.c (score_opcodes): Add sentinel.

7 years agoFix address violation bug when disassembling a corrupt SH binary.
Nick Clifton [Wed, 14 Jun 2017 16:01:54 +0000 (17:01 +0100)]
Fix address violation bug when disassembling a corrupt SH binary.

PR binutils/21578
* elf32-sh.c (sh_elf_set_mach_from_flags): Fix check for invalid
flag value.

7 years agoFix address violation when disassembling a corrupt binary.
Nick Clifton [Wed, 14 Jun 2017 15:50:03 +0000 (16:50 +0100)]
Fix address violation when disassembling a corrupt binary.

PR binutils/21580
binutils * objdump.c (disassemble_bytes): Check for buffer overrun when
printing out rae insns.

ld * testsuite/ld-nds32/diff.d: Adjust expected output.

7 years agoDon't use print_insn_XXX in GDB
Yao Qi [Wed, 14 Jun 2017 15:28:30 +0000 (16:28 +0100)]
Don't use print_insn_XXX in GDB

This is a follow-up to

  [PATCH 0/6] Unify the disassembler selection in gdb and objdump
  https://sourceware.org/ml/binutils/2017-05/msg00192.html

that is, opcodes is able to select the right disassembler, so gdb
doesn't have to select them.  Instead, gdb can just use
default_print_insn.  As a result, these print_insn_XXX are not used
out of opcodes, so this patch also moves their declarations from
include/dis-asm.h to opcodes/disassemble.h.  With this change,
GDB doesn't use any print_insn_XXX directly any more.

gdb:

2017-06-14  Yao Qi  <yao.qi@linaro.org>

* aarch64-tdep.c (aarch64_gdb_print_insn): Call
default_print_insn instead of print_insn_aarch64.
* arm-tdep.c (gdb_print_insn_arm): Call
default_print_insn instead of print_insn_big_arm
and print_insn_little_arm.
* i386-tdep.c (i386_print_insn): Call default_print_insn
instead of print_insn_i386.
* ia64-tdep.c (ia64_print_insn): Call
default_print_insn instead of print_insn_ia64.
* mips-tdep.c (gdb_print_insn_mips): Call
default_print_insn instead of print_insn_big_mips
and print_insn_little_mips.
* spu-tdep.c (gdb_print_insn_spu): Call default_print_insn
instead of print_insn_spu.

include:

2017-06-14  Yao Qi  <yao.qi@linaro.org>

* dis-asm.h (print_insn_aarch64): Move it to opcodes/disassemble.h.
(print_insn_big_arm, print_insn_big_mips): Likewise.
(print_insn_i386, print_insn_ia64): Likewise.
(print_insn_little_arm, print_insn_little_mips): Likewise.
(print_insn_spu): Likewise.

opcodes:

2017-06-14  Yao Qi  <yao.qi@linaro.org>

* aarch64-dis.c: Include disassemble.h instead of dis-asm.h.
* arm-dis.c: Likewise.
* ia64-dis.c: Likewise.
* mips-dis.c: Likewise.
* spu-dis.c: Likewise.
* disassemble.h (print_insn_aarch64): New declaration, moved from
include/dis-asm.h.
(print_insn_big_arm, print_insn_big_mips): Likewise.
(print_insn_i386, print_insn_ia64): Likewise.
(print_insn_little_arm, print_insn_little_mips): Likewise.

7 years agoxfail pr20022.d on targets without dynamic relocs in .text
H.J. Lu [Wed, 14 Jun 2017 13:11:48 +0000 (06:11 -0700)]
xfail pr20022.d on targets without dynamic relocs in .text

ld-gc/pr20022.d requires support for dynamic relocations in .text
section.

PR ld/20022
* testsuite/ld-gc/pr20022.d: Skip on targets without dynamic
relocations in .text section.

7 years agoSkip PR ld/21562 tests on targets with leading char or without --gc-sections
H.J. Lu [Wed, 14 Jun 2017 11:36:17 +0000 (04:36 -0700)]
Skip PR ld/21562 tests on targets with leading char or without --gc-sections

Symbol lookup in linker will always fail on targets with leading char
in symbol name since __start_SECNAME and __stop_SECNAME in C may be
___start_SECNAME and ___stop_SECNAME in assembly.  Also tests with
--gc-sections always fails on targets without --gc-sections support.

* testsuite/ld-elf/pr21562a.d: Skip on targets with leading char
in in symbol name or without --gc-sections.
* testsuite/ld-elf/pr21562b.d: Likewise.
* testsuite/ld-elf/pr21562c.d: Likewise.
* testsuite/ld-elf/pr21562d.d: Likewise.
* testsuite/ld-elf/pr21562i.d: Likewise.
* testsuite/ld-elf/pr21562j.d: Likewise.
* testsuite/ld-elf/pr21562k.d: Likewise.
* testsuite/ld-elf/pr21562l.d: Likewise.
* testsuite/ld-elf/pr21562m.d: Likewise.
* testsuite/ld-elf/pr21562n.d: Likewise.
* testsuite/ld-elf/pr21562e.d: Skip on targets with leading char
in symbol name.
* testsuite/ld-elf/pr21562f.d: Likewise.
* testsuite/ld-elf/pr21562g.d: Likewise.
* testsuite/ld-elf/pr21562h.d: Likewise.

7 years agoAdd size to bar in ld-gc/pr20022a.s
H.J. Lu [Wed, 14 Jun 2017 12:51:59 +0000 (05:51 -0700)]
Add size to bar in ld-gc/pr20022a.s

Some linker backends require size info on dynamic symbols.

* testsuite/ld-gc/pr20022a.s: Add size to bar.

7 years agoSkip sizeof/startof tests on targets with leading char
H.J. Lu [Wed, 14 Jun 2017 12:49:02 +0000 (05:49 -0700)]
Skip sizeof/startof tests on targets with leading char

Symbol lookup in linker will always fail on targets with leading char
in symbol name since __start_SECNAME and __stop_SECNAME in C may be
___start_SECNAME and ___stop_SECNAME in assembly.

* testsuite/ld-elf/sizeofa.d: Skip on targets with leading char
in symbol name.
* testsuite/ld-elf/sizeofb.d: Likewise.
* testsuite/ld-elf/startofa.d: Likewise.
* testsuite/ld-elf/startofb.d: Likewise.

7 years agoFix address violation problems when disassembling a corrupt RX binary.
Nick Clifton [Wed, 14 Jun 2017 12:35:06 +0000 (13:35 +0100)]
Fix address violation problems when disassembling a corrupt RX binary.

PR binutils/21587
* rx-decode.opc: Include libiberty.h
(GET_SCALE): New macro - validates access to SCALE array.
(GET_PSCALE): New macro - validates access to PSCALE array.
(DIs, SIs, S2Is, rx_disp): Use new macros.
* rx-decode.c: Regenerate.

7 years agoFix register selection in var-access.exp
Andreas Arnez [Wed, 14 Jun 2017 12:24:03 +0000 (14:24 +0200)]
Fix register selection in var-access.exp

The new test var-access.exp causes FAILs on i686.  This is because the
test chooses the wrong name for DWARF register number 1: It uses
"edx" (which corresponds to DWARF register number 2), but should have used
"ecx" instead.

Also, the current logic in var-access.exp does not correctly distinguish
between a 64-bit and a 32-bit program on an x86-64 target.  It uses the
64-bit register names for both.

These problems are fixed.  In order to address the latter, the convenience
macros is_*_target are exploited where appropriate.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/var-access.exp: Use register name ecx instead of edx
on 32-bit x86 targets.  Exploit is_*_target macros where
appropriate.

7 years agoMove location of .jumptables section and add .hightext section to AVR linker script.
Georg-Johann Lay [Wed, 14 Jun 2017 11:23:39 +0000 (12:23 +0100)]
Move location of .jumptables section and add .hightext section to AVR linker script.

PR ld/21583
* scripttempl/avr.sc (.jumptables): Move down in text section.
(.hightext): New in text.

7 years agoFix potential address violations when processing a corrupt Alpha VMA binary.
Nick Clifton [Wed, 14 Jun 2017 10:27:15 +0000 (11:27 +0100)]
Fix potential address violations when processing a corrupt Alpha VMA binary.

PR binutils/21589
* vms-alpha.c (_bfd_vms_get_value): Add an extra parameter - the
maximum value for the ascic pointer.  Check that name processing
does not read beyond this value.
(_bfd_vms_slurp_etir): Add checks for attempts to read beyond the
end of etir record.

7 years agoIntroduce gdb::byte_vector, add allocator that default-initializes
Pedro Alves [Wed, 14 Jun 2017 10:08:52 +0000 (11:08 +0100)]
Introduce gdb::byte_vector, add allocator that default-initializes

In some cases we've been replacing heap-allocated gdb_byte buffers
managed with xmalloc/make_cleanup(xfree) with gdb::vector<gdb_byte>.
That usually pessimizes the code a little bit because std::vector
value-initializes elements (which for gdb_byte means
zero-initialization), while if you're creating a temporary buffer,
you're most certaintly going to fill it in with some data.  An
alternative is to use

  unique_ptr<gdb_byte[]> buf (new gdb_byte[size]);

but it looks like that's not very popular.

Recently, a use of obstacks in dwarf2read.c was replaced with
std::vector<gdb_byte> and that as well introduced a pessimization for
always memsetting the buffer when it's garanteed that the zeros will
be overwritten immediately.  (see dwarf2read.c change in this patch to
find it.)

So here's a different take at addressing this issue "by design":

#1 - Introduce default_init_allocator<T>

I.e., a custom allocator that does default construction using default
initialization, meaning, no more zero initialization.  That's the
default_init_allocation<T> class added in this patch.

See "Notes" at
<http://en.cppreference.com/w/cpp/container/vector/resize>.

#2 - Introduce def_vector<T>

I.e., a convenience typedef, because typing the allocator is annoying:

  using def_vector<T> = std::vector<T, gdb::default_init_allocator<T>>;

#3 - Introduce byte_vector

Because gdb_byte vectors will be the common thing, add a convenience
"byte_vector" typedef:

  using byte_vector = def_vector<gdb_byte>;

which is really the same as:

  std::vector<gdb_byte, gdb::default_init_allocator<gdb_byte>>;

The intent then is to make "gdb::byte_vector" be the go-to for dynamic
byte buffers.  So the less friction, the better.

#4 - Adjust current code to use it.

To set the example going forward.  Replace std::vector uses and also
unique_ptr<byte[]> uses.

One nice thing is that with this allocator, for changes like these:

  -std::unique_ptr<byte[]> buf (new gdb_byte[some_size]);
  +gdb::byte_vector buf (some_size);
   fill_with_data (buf.data (), buf.size ());

the generated code is the same as before.  I.e., the compiler
de-structures the vector and gets rid of the unused "reserved vs size"
related fields.

The other nice thing is that it's easier to write
  gdb::byte_vector buf (size);
than
  std::unique_ptr<gdb_byte[]> buf (new gdb_byte[size]);
or even (C++14):
  auto buf = std::make_unique<gdb_byte[]> (size); // zero-initializes...

#5 - Suggest s/std::vector<gdb_byte>/gdb::byte_vector/ going forward.

Note that this commit actually fixes a couple of bugs where the current
code is incorrectly using "std::vector::reserve(new_size)" and then
accessing the vector's internal buffer beyond the vector's size: see
dwarf2loc.c and charset.c.  That's undefined behavior and may trigger
debug mode assertion failures.  With default_init_allocator,
"resize()" behaves like "reserve()" performance wise, in that it
leaves new elements with unspecified values, but, it does that safely
without triggering undefined behavior when you access those values.

gdb/ChangeLog:
2017-06-14  Pedro Alves  <palves@redhat.com>

* ada-lang.c: Include "common/byte-vector.h".
(ada_value_primitive_packed_val): Use gdb::byte_vector.
* charset.c (wchar_iterator::iterate): Resize the vector instead
of reserving it.
* common/byte-vector.h: Include "common/def-vector.h".
(wchar_iterator::m_out): Now a gdb::def_vector<gdb_wchar_t>.
* cli/cli-dump.c: Include "common/byte-vector.h".
(dump_memory_to_file, restore_binary_file): Use gdb::byte_vector.
* common/byte-vector.h: New file.
* common/def-vector.h: New file.
* common/default-init-alloc.h: New file.
* dwarf2loc.c: Include "common/byte-vector.h".
(rw_pieced_value): Use gdb::byte_vector, and resize the vector
instead of reserving it.
* dwarf2read.c: Include "common/byte-vector.h".
(data_buf::m_vec): Now a gdb::byte_vector.
* gdb_regex.c: Include "common/def-vector.h".
(compiled_regex::compiled_regex): Use gdb::def_vector<char>.
* mi/mi-main.c: Include "common/byte-vector.h".
(mi_cmd_data_read_memory): Use gdb::byte_vector.
* printcmd.c: Include "common/byte-vector.h".
(print_scalar_formatted): Use gdb::byte_vector.
* valprint.c: Include "common/byte-vector.h".
(maybe_negate_by_bytes, print_decimal_chars): Use
gdb::byte_vector.

7 years ago[opcodes][arm] Remove bogus entry added by accident in former patch
Andre Vieira [Wed, 14 Jun 2017 09:52:40 +0000 (10:52 +0100)]
[opcodes][arm] Remove bogus entry added by accident in former patch

2017-07-14  Andre Vieira  <andre.simoesdiasvieira@arm.com>

* arm-dis.c (print_insn_arm): Remove bogus entry for bx.

7 years agoFix seg-faults in objdump when disassembling a corrupt versados binary.
Nick Clifton [Wed, 14 Jun 2017 09:35:16 +0000 (10:35 +0100)]
Fix seg-faults in objdump when disassembling a corrupt versados binary.

PR binutils/21591
* versados.c (versados_mkobject): Zero the allocated tdata structure.
(process_otr): Check for an invalid offset in the otr structure.

7 years agoAccept more epiphany targets
Sebastian Huber [Tue, 13 Jun 2017 05:48:40 +0000 (07:48 +0200)]
Accept more epiphany targets

In particular this adds support for the epiphany-rtems target.

bfd/
* config.bfd (epiphany-*-elf): Accept epiphany-*-*.

ld/
* configure.tgt (epiphany-*-elf): Accept epiphany-*-*.

7 years agoAutomatic date update in version.in
GDB Administrator [Wed, 14 Jun 2017 00:00:25 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agold: Don't define __start_SECNAME/__stop_SECNAME for -r
H.J. Lu [Tue, 13 Jun 2017 20:04:56 +0000 (13:04 -0700)]
ld: Don't define __start_SECNAME/__stop_SECNAME for -r

__start_SECNAME and __stop_SECNAME shouldn't be defined for "ld -r".

* ldlang.c (lang_set_startof): Skip if config.build_constructors
is FALSE.
* testsuite/ld-elf/sizeofc.d: New file.
* testsuite/ld-elf/startofc.d: Likewise.

7 years agodarwin-nat: Add missing include
Simon Marchi [Tue, 13 Jun 2017 19:14:50 +0000 (21:14 +0200)]
darwin-nat: Add missing include

I forgot this one, which is kind of related.

The function trace_start_error_with_name has moved in commit "Share
fork_inferior et al with gdbserver", so this additional include is
needed.

Fixes:

darwin-nat.c:1735:5: error: use of undeclared identifier 'trace_start_error_with_name'
    trace_start_error_with_name ("close");

gdb/ChangeLog:

* darwin-nat.c: Include "nat/fork-inferior.h".

7 years agodarwin: Add fork-inferior.o to NATDEPFILES
Simon Marchi [Tue, 13 Jun 2017 19:14:35 +0000 (21:14 +0200)]
darwin: Add fork-inferior.o to NATDEPFILES

I happened to be build-testing on macOS and found this:

  Undefined symbols for architecture x86_64:

    "fork_inferior(char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char**, void (*)(), void (*)(int), void (*)(), char const*, void (*)(char const*, char* const*, char* const*))", referenced from:

        darwin_create_inferior(target_ops*, char const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, char**, int) in darwin-nat.o

    "startup_inferior(int, int, target_waitstatus*, ptid_t*)", referenced from:

        gdb_startup_inferior(int, int) in fork-child.o

    "trace_start_error(char const*, ...)", referenced from:

        darwin_ptrace_me() in darwin-nat.o

    "trace_start_error_with_name(char const*)", referenced from:

        darwin_ptrace_me() in darwin-nat.o

  ld: symbol(s) not found for architecture x86_64

  clang: error: linker command failed with exit code 1 (use -v to see invocation)

Adding fork-inferior.o fixes it.  I factored out the Darwin bits that
are no architecture-specific in the section meant for that at the top.

I only built-tested this using Travis-CI, since I don't have access to
this platform.

gdb/ChangeLog:

* configure.nat: Factor out Darwin bits that are not
architecture-specific.  Add fork-inferior.o.

7 years agoaix: Add fork-inferior.o to NATDEPFILES
Simon Marchi [Tue, 13 Jun 2017 19:14:25 +0000 (21:14 +0200)]
aix: Add fork-inferior.o to NATDEPFILES

Trying to build on AIX gives:

ld: 0711-317 ERROR: Undefined symbol: .trace_start_error_with_name(char const*)
ld: 0711-317 ERROR: Undefined symbol: .fork_inferior(char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, char**, void (*)(), void (*)(int), void (*)(), char const*, void (*)(char const*, char* const*, char* const*))
ld: 0711-317 ERROR: Undefined symbol: .startup_inferior(int, int, target_waitstatus*, ptid_t*)

Including fork-inferior.o in the build should help.  I also factored out
the AIX bits that are not architecture-specific to be consistent with the other
OSes.

gdb/ChangeLog:

* configure.nat: Factor out AIX bits that are not
architecture-specific.  Add fork-inferior.o.

7 years agold: Add tests for .startof.SECNAME/.sizeof.SECNAME
H.J. Lu [Tue, 13 Jun 2017 19:03:40 +0000 (12:03 -0700)]
ld: Add tests for .startof.SECNAME/.sizeof.SECNAME

* testsuite/ld-elf/sizeof.d: Renamed to ...
* testsuite/ld-elf/sizeofa.d: This.  Updated.
* testsuite/ld-elf/startof.d: Renamed to ...
* testsuite/ld-elf/startofa.d: This.  Updated.
* testsuite/ld-elf/sizeofb.d: New file.
* testsuite/ld-elf/startofb.d: Likewise.

7 years agoAlways define referenced __start_SECNAME/__stop_SECNAME
H.J. Lu [Tue, 13 Jun 2017 15:53:22 +0000 (08:53 -0700)]
Always define referenced __start_SECNAME/__stop_SECNAME

Currently, linker will define __start_SECNAME and __stop_SECNAME symbols
only for orphaned sections.

However, during garbage collection, ELF linker marks all sections with
references to __start_SECNAME and __stop_SECNAME symbols as used even
when section SECNAME isn't an orphaned section and linker won't define
__start_SECNAME nor __stop_SECNAME.  And ELF linker stores the first
input section whose name matches __start_SECNAME or __stop_SECNAME in
u.undef.section for garbage collection.  If these symbols are provided
in linker script, u.undef.section is set to the section where they will
defined by linker script, which leads to the incorrect output.

This patch changes linker to always define referenced __start_SECNAME and
__stop_SECNAME if the input section name is the same as the output section
name, which is always true for orphaned sections, and SECNAME is a C
identifier.  Also __start_SECNAME and __stop_SECNAME symbols are marked
as hidden by ELF linker so that __start_SECNAME and __stop_SECNAME symbols
for section SECNAME in different modules are unique.  For garbage
collection, ELF linker stores the first matched input section in the
unused vtable field.

bfd/

PR ld/20022
PR ld/21557
PR ld/21562
PR ld/21571
* elf-bfd.h (elf_link_hash_entry): Add start_stop.  Change the
vtable field to a union.
(_bfd_elf_is_start_stop): Removed.
* elf32-i386.c (elf_i386_convert_load_reloc): Also check for
__start_SECNAME and __stop_SECNAME symbols.
* elf64-x86-64.c (elf_x86_64_convert_load_reloc): Likewise.
* elflink.c (_bfd_elf_is_start_stop): Removed.
(_bfd_elf_gc_mark_rsec): Check start_stop instead of calling
_bfd_elf_is_start_stop.
(elf_gc_propagate_vtable_entries_used): Skip __start_SECNAME and
__stop_SECNAME symbols.  Updated.
(elf_gc_smash_unused_vtentry_relocs): Likewise.
(bfd_elf_gc_record_vtinherit): Likewise.
(bfd_elf_gc_record_vtentry): Likewise.

ld/

PR ld/20022
PR ld/21557
PR ld/21562
PR ld/21571
* ld.texinfo: Update __start_SECNAME/__stop_SECNAME symbols.
* ldlang.c (lang_insert_orphan): Move handling of __start_SECNAME
and __stop_SECNAME symbols to ...
(lang_set_startof): Here.  Also define __start_SECNAME and
__stop_SECNAME for -Ur.
* emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Mark
referenced __start_SECNAME and __stop_SECNAME symbols as hidden
and set start_stop for garbage collection.
* testsuite/ld-elf/pr21562a.d: New file.
* testsuite/ld-elf/pr21562a.s: Likewise.
* testsuite/ld-elf/pr21562a.t: Likewise.
* testsuite/ld-elf/pr21562b.d: Likewise.
* testsuite/ld-elf/pr21562b.s: Likewise.
* testsuite/ld-elf/pr21562b.t: Likewise.
* testsuite/ld-elf/pr21562c.d: Likewise.
* testsuite/ld-elf/pr21562c.t: Likewise.
* testsuite/ld-elf/pr21562d.d: Likewise.
* testsuite/ld-elf/pr21562d.t: Likewise.
* testsuite/ld-elf/pr21562e.d: Likewise.
* testsuite/ld-elf/pr21562f.d: Likewise.
* testsuite/ld-elf/pr21562g.d: Likewise.
* testsuite/ld-elf/pr21562h.d: Likewise.
* testsuite/ld-elf/pr21562i.d: Likewise.
* testsuite/ld-elf/pr21562j.d: Likewise.
* testsuite/ld-elf/pr21562k.d: Likewise.
* testsuite/ld-elf/pr21562l.d: Likewise.
* testsuite/ld-elf/pr21562m.d: Likewise.
* testsuite/ld-elf/pr21562n.d: Likewise.
* testsuite/ld-gc/pr20022.d: Likewise.
* testsuite/ld-gc/pr20022a.s: Likewise.
* testsuite/ld-gc/pr20022b.s: Likewise.
* testsuite/ld-gc/gc.exp: Run PR ld/20022 tests.
* testsuite/ld-gc/pr19161.d: Also accept local __start_SECNAME
symbol.
* testsuite/ld-gc/start.d: Likewise.
* testsuite/ld-x86-64/lea1a.d: Updated.
* testsuite/ld-x86-64/lea1b.d: Updated.
* testsuite/ld-x86-64/lea1d.d: Updated.
* testsuite/ld-x86-64/lea1e.d: Likewise.

7 years agoReplace multiple AVR scripts with a single, customizable linker script.
Georg-Johann Lay [Tue, 13 Jun 2017 15:50:26 +0000 (16:50 +0100)]
Replace multiple AVR scripts with a single, customizable linker script.

PR ld/21569
        * scripttempl/avrtiny.sc: Remove file.
* Makefile.am (eavrtiny.c): Depend on avr.sc, no more on avrtiny.sc.
* Makefile.in: Regenerate.
* emulparams/avrtiny.sh (SCRIPT_NAME): Set var to "avr".
(TEXT_ORIGIN): Remove var.
(FUSE_NAME, FUSE_LENGTH, LOCK_LENGTH, SIGNATURE_LENGTH)
(RODATA_PM_OFFSET): Set new vars.
* emulparams/avr1.sh (FUSE_NAME, EEPROM_LENGTH, FUSE_LENGTH)
(LOCK_LENGTH, SIGNATURE_LENGTH, USER_SIGNATURE_LENGTH): Set new vars.
* emulparams/avr2.sh: Same.
* emulparams/avr25.sh: Same.
* emulparams/avr3.sh: Same.
* emulparams/avr31.sh: Same.
* emulparams/avr35.sh: Same.
* emulparams/avr4.sh: Same.
* emulparams/avr5.sh: Same.
* emulparams/avr51.sh: Same.
* emulparams/avr6.sh: Same.
* emulparams/avrxmega1.sh: Same.
* emulparams/avrxmega2.sh: Same.
* emulparams/avrxmega3.sh: Same.
* emulparams/avrxmega4.sh: Same.
* emulparams/avrxmega5.sh: Same.
* emulparams/avrxmega6.sh: Same.
* emulparams/avrxmega7.sh: Same.
* scripttempl/avr.sc (__EEPROM_REGION_LENGTH__): Only define
if EEPROM_LENGTH is set.
(MEMORY) [eeprom]: Same.
(SECTIONS) [.eeprom]: Same for output section.
(__USER_SIGNATURE_REGION_LENGTH__): Only define if
USER_SIGNATURE_LENGTH is set.
(MEMORY) [user_signatures]: Same.
(SECTIONS) [.fuse]: Only define output section if FUSE_NAME = fuse.
(SECTIONS) [.config]: Only define output section if FUSE_NAME = config.

7 years agold: Add tests for -Ur
H.J. Lu [Tue, 13 Jun 2017 15:18:19 +0000 (08:18 -0700)]
ld: Add tests for -Ur

Test -Ur with __start_SECNAME, __stop_SECNAME, .startof.SECNAME and
.sizeof.SECNAME.  __start_SECNAME and __stop_SECNAME should be defined
to the start and the end of section SECNAME.  .startof.SECNAME and
.sizeof.SECNAME should be undefined.

* testsuite/ld-elf/sizeof.d: New file.
* testsuite/ld-elf/sizeof.s: Likewise.
* testsuite/ld-elf/startof.d: Likewise.
* testsuite/ld-elf/startof.s: Likewise.

7 years ago[LD][Testsuite] Add --no-dynamic-linker option to dynamic-1 rdynamic-1 test case.
Renlin Li [Tue, 13 Jun 2017 13:03:47 +0000 (14:03 +0100)]
[LD][Testsuite] Add --no-dynamic-linker option to dynamic-1 rdynamic-1 test case.

arm-none-eabi-ld supports shared libraries. However, the toolchain may be
configured to generate statically linked executable by default.

It is required to have --no-dynamic-linker option before adding dynamic symbol
to static executable.
For dynamically linked executable, the behavior won't change.

ld/ChangeLog
2017-06-13  Renlin Li  <renlin.li@arm.com>

* testsuite/ld-elf/shared.exp (build_tests): Add --no-dynamic-linker
option to rdynamic-1 and dynamic-1 tests.

7 years agoread/write_pieced_value: Merge into one function
Andreas Arnez [Tue, 13 Jun 2017 13:20:32 +0000 (15:20 +0200)]
read/write_pieced_value: Merge into one function

Since read_pieced_value and write_pieced_value share significant logic,
this patch merges them into a single function rw_pieced_value.

gdb/ChangeLog:

* dwarf2loc.c (rw_pieced_value): New.  Merge logic from...
(read_pieced_value, write_pieced_value): ...here.  Reduce to
wrappers that just call rw_pieced_value.

7 years agowrite_pieced_value: Notify memory_changed observers
Andreas Arnez [Tue, 13 Jun 2017 13:20:32 +0000 (15:20 +0200)]
write_pieced_value: Notify memory_changed observers

So far write_pieced_value uses write_memory when writing memory pieces to
the target.  However, this is a case where GDB potentially overwrites a
watchpoint value.  In such a case write_memory_with_notification should be
used instead, so that memory_changed observers get notified.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): When writing the data for a
memory piece, use write_memory_with_notification instead of
write_memory.

7 years agoFix bit-/byte-offset mismatch in parameter to read_value_memory
Andreas Arnez [Tue, 13 Jun 2017 13:20:31 +0000 (15:20 +0200)]
Fix bit-/byte-offset mismatch in parameter to read_value_memory

The function read_value_memory accepts a parameter embedded_offset and
expects it to represent the byte offset into the given value.  However,
the only invocation with a possibly non-zero embedded_offset happens in
read_pieced_value, where a bit offset is passed instead.

Adjust the implementation of read_value_memory to meet the caller's
expectation.  This implicitly fixes the invocation in read_pieced_value.

gdb/ChangeLog:

* valops.c (read_value_memory): Change embedded_offset to
represent a bit offset instead of a byte offset.
* value.h (read_value_memory): Adjust comment.

7 years agoread/write_pieced_value: Remove unnecessary variable copies
Andreas Arnez [Tue, 13 Jun 2017 13:20:31 +0000 (15:20 +0200)]
read/write_pieced_value: Remove unnecessary variable copies

In read_pieced_value's main loop, the variables `dest_offset_bits' and
`source_offset_bits' are basically just copies of `offset' and
`bits_to_skip', respectively.  In write_pieced_value the copies are
reversed.  This is not very helpful when trying to keep the logic between
these functions in sync.  Since the copies are unnecessary, this patch
just removes them.

gdb/ChangeLog:

* dwarf2loc.c (read_pieced_value): Remove unnecessary variables
dest_offset_bits and source_offset_bits.
(write_pieced_value): Likewise.

7 years agoRespect piece offset for DW_OP_bit_piece
Andreas Arnez [Tue, 13 Jun 2017 13:20:31 +0000 (15:20 +0200)]
Respect piece offset for DW_OP_bit_piece

So far GDB ignores the piece offset of all kinds of DWARF bit
pieces (DW_OP_bit_piece) and treats such pieces as if the offset was zero.

This is fixed, and an appropriate test is added.

gdb/ChangeLog:

* dwarf2loc.c (read_pieced_value): Respect the piece offset, as
given by DW_OP_bit_piece.
(write_pieced_value): Likewise.

  Andreas Arnez  <arnez@linux.vnet.ibm.com>

* gdb.dwarf2/var-access.exp: Add test for composite location with
nonzero piece offsets.

7 years agoread/write_pieced_value: Improve logic for buffer allocation
Andreas Arnez [Tue, 13 Jun 2017 13:20:30 +0000 (15:20 +0200)]
read/write_pieced_value: Improve logic for buffer allocation

So far the main loop in read_pieced_value and write_pieced_value is
structured like this:

(1) Prepare a buffer and some variables we may need;

(2) depending on the DWARF piece type to be handled, use the buffer and
    the prepared variables, ignore them, or even recalculate them.

This approach reduces readability and may also lead to unnecessary copying
of data.  This patch moves the preparations to the places where sufficient
information is available and removes some of the variables involved.

gdb/ChangeLog:

* dwarf2loc.c (read_pieced_value): Move the buffer allocation and
some other preparations to the places where sufficient information
is available.
(write_pieced_value): Likewise.

7 years agoFix handling of DWARF register pieces on big-endian targets
Andreas Arnez [Tue, 13 Jun 2017 13:20:30 +0000 (15:20 +0200)]
Fix handling of DWARF register pieces on big-endian targets

For big-endian targets the logic in read/write_pieced_value tries to take
a register piece from the LSB end.  This requires offsets and sizes to be
adjusted accordingly, and that's where the current implementation has some
issues:

* The formulas for recalculating the bit- and byte-offsets into the
  register are wrong.  They just happen to yield correct results if
  everything is byte-aligned and the piece's last byte belongs to the
  given value.

* After recalculating the bit offset into the register, the number of
  bytes to be copied from the register is not recalculated.  Of course
  this does not matter if everything (particularly the piece size) is
  byte-aligned.

These issues are fixed.  The size calculation is performed with a new
helper function bits_to_bytes().

gdb/ChangeLog:

* dwarf2loc.c (bits_to_bytes): New function.
(read_pieced_value): Fix offset calculations for register pieces
on big-endian targets.
(write_pieced_value): Likewise.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/var-access.exp: Add test for non-byte-aligned
register pieces.

7 years agoread/write_pieced_value: Drop 'buffer_size' variable
Andreas Arnez [Tue, 13 Jun 2017 13:20:30 +0000 (15:20 +0200)]
read/write_pieced_value: Drop 'buffer_size' variable

When the variable 'buffer_size' in read_pieced_value and
write_pieced_value was introduced, it was needed for tracking the buffer's
allocated size.  Now that the buffer's data type has been changed to a
std::vector, the variable is no longer necessary; so remove it.

gdb/ChangeLog:

* dwarf2loc.c (read_pieced_value): Remove buffer_size variable.
(write_pieced_value): Likewise.

7 years agoAdd DWARF piece test cases for bit-field access
Andreas Arnez [Tue, 13 Jun 2017 13:20:29 +0000 (15:20 +0200)]
Add DWARF piece test cases for bit-field access

This verifies some of the previous fixes to the logic in
write_pieced_value when accessing bit-fields.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/var-access.exp: Add tests for accessing bit-fields
located in one or more DWARF pieces.

7 years agowrite_pieced_value: Transfer least significant bits into bit-field
Andreas Arnez [Tue, 13 Jun 2017 13:20:28 +0000 (15:20 +0200)]
write_pieced_value: Transfer least significant bits into bit-field

On big-endian targets, when targeting a bit-field, write_pieced_value
currently transfers the source value's *most* significant bits to the
target value, instead of its least significant bits.  This is fixed.

In particular the fix adjusts the initial value of 'offset', which can now
potentially be nonzero.  Thus the variable 'type_len' is renamed to
'max_offset', to avoid confusion.  And for consistency, the affected logic
that was mirrored in read_pieced_value is changed there in the same way.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): When writing to a bit-field,
transfer the source value's least significant bits, instead of its
lowest-addressed ones.  Rename type_len to max_offset.
(read_pieced_value): Mirror above changes to write_pieced_value as
applicable.

7 years agowrite_pieced_value: Fix buffer offset for memory pieces
Andreas Arnez [Tue, 13 Jun 2017 13:20:28 +0000 (15:20 +0200)]
write_pieced_value: Fix buffer offset for memory pieces

In write_pieced_value, when transferring the data to target memory via a
buffer, the bit offset within the target value is not reduced to its
sub-byte fraction before using it as a bit offset into the buffer.  This
is fixed.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): In DWARF_VALUE_MEMORY,
truncate full bytes from dest_offset_bits before using it as an
offset into the buffer.

7 years agowrite_pieced_value: Include transfer size in byte-wise check
Andreas Arnez [Tue, 13 Jun 2017 13:20:27 +0000 (15:20 +0200)]
write_pieced_value: Include transfer size in byte-wise check

In write_pieced_value, when checking whether the data can be transferred
byte-wise, the current logic verifies the source- and destination offsets
to be byte-aligned, but not the transfer size.  This is fixed.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): Include transfer size in
byte-wise check.

7 years agowrite_pieced_value: Fix copy/paste error in size calculation
Andreas Arnez [Tue, 13 Jun 2017 13:20:27 +0000 (15:20 +0200)]
write_pieced_value: Fix copy/paste error in size calculation

In write_pieced_value, the number of bytes containing a portion of the
bit-field in a given piece is calculated with the wrong starting offset;
thus the result may be off by one.  This bug was probably introduced when
copying this logic from read_pieced_value.  Fix it.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): Fix copy/paste error in the
calculation of this_size.

7 years agoread/write_pieced_value: Respect value parent's offset
Andreas Arnez [Tue, 13 Jun 2017 13:20:27 +0000 (15:20 +0200)]
read/write_pieced_value: Respect value parent's offset

In the case of targeting a bit-field, read_pieced_value and
write_pieced_value calculate the number of bits preceding the bit-field
without considering the relative offset of the value's parent.  This is
relevant for a structure variable like this:

  struct s {
      uint64_t foo;
      struct {
  uint32_t bar;
  uint32_t bf : 10;  /* <-- target bit-field */
      } baz;
  } s;

In this scenario, if 'val' is a GDB value representing s.baz.bf,
val->parent represents the whole s.baz structure, and the following holds:

  - value_offset (val) == sizeof s.baz.bar == 4
  - value_offset (val->parent) == sizeof s.foo == 8

The current logic would only use value_offset(val), resulting in the wrong
offset into the target value.  This is fixed.

gdb/ChangeLog:

* dwarf2loc.c (read_pieced_value): Respect parent value's offset
when targeting a bit-field.
(write_pieced_value): Likewise.

7 years agogdb/testsuite: Add "get_endianness" convenience proc
Andreas Arnez [Tue, 13 Jun 2017 13:20:26 +0000 (15:20 +0200)]
gdb/testsuite: Add "get_endianness" convenience proc

The test suite contains multiple instances of determining the target's
endianness with GDB's "show endian" command.  This patch replaces these by
an invocation of a new convenience proc 'get_endianness'.

gdb/testsuite/ChangeLog:

* lib/gdb.exp (get_endianness): New proc.
* gdb.arch/aarch64-fp.exp: Use it.
* gdb.arch/altivec-regs.exp: Likewise.
* gdb.arch/e500-regs.exp: Likewise.
* gdb.arch/vsx-regs.exp: Likewise.
* gdb.base/dump.exp: Likewise.
* gdb.base/funcargs.exp: Likewise.
* gdb.base/gnu_vector.exp: Likewise.
* gdb.dwarf2/formdata16.exp: Likewise.
* gdb.dwarf2/implptrpiece.exp: Likewise.
* gdb.dwarf2/nonvar-access.exp: Likewise.
* gdb.python/py-inferior.exp: Likewise.
* gdb.trace/unavailable-dwarf-piece.exp: Likewise.

7 years agoRemove addr_size field from struct piece_closure
Andreas Arnez [Tue, 13 Jun 2017 13:20:26 +0000 (15:20 +0200)]
Remove addr_size field from struct piece_closure

The addr_size field in the piece_closure data structure is a relic from
before introducing the typed DWARF stack.  It is obsolete now.  This patch
removes it.

gdb/ChangeLog:

* dwarf2loc.c (struct piece_closure) <addr_size>: Remove field.
(allocate_piece_closure): Drop addr_size parameter.
(dwarf2_evaluate_loc_desc_full): Adjust call to
allocate_piece_closure.

7 years agoPR gdb/21226: Take DWARF stack value pieces from LSB end
Andreas Arnez [Tue, 13 Jun 2017 13:20:26 +0000 (15:20 +0200)]
PR gdb/21226: Take DWARF stack value pieces from LSB end

When taking a DW_OP_piece or DW_OP_bit_piece from a DW_OP_stack_value, the
existing logic always takes the piece from the lowest-addressed end, which
is wrong on big-endian targets.  The DWARF standard states that the
"DW_OP_bit_piece operation describes a sequence of bits using the least
significant bits of that value", and this also matches the current logic
in GCC.  For instance, the GCC guality test case pr54970.c fails on s390x
because of this.

This fix adjusts the piece accordingly on big-endian targets.  It is
assumed that:

* DW_OP_piece shall take the piece from the LSB end as well;

* pieces reaching outside the stack value bits are considered undefined,
  and a zero value can be used instead.

gdb/ChangeLog:

PR gdb/21226
* dwarf2loc.c (read_pieced_value): Anchor stack value pieces at
the LSB end, independent of endianness.

gdb/testsuite/ChangeLog:

PR gdb/21226
* gdb.dwarf2/nonvar-access.exp: Add checks for verifying that
stack value pieces are taken from the LSB end.

7 years agowrite_pieced_value: Fix size capping logic
Andreas Arnez [Tue, 13 Jun 2017 13:20:26 +0000 (15:20 +0200)]
write_pieced_value: Fix size capping logic

A field f in a structure composed of DWARF pieces may be located in
multiple pieces, where the first and last of those may contain bits from
other fields as well.  So when writing to f, the beginning of the first
and the end of the last of those pieces may have to be skipped.  But the
logic in write_pieced_value for handling one of those pieces is flawed
when the first and last piece are the same, i.e., f is contained in a
single piece:

  < - - - - - - - - - piece_size - - - - - - - - - ->
  +-------------------------------------------------+
  | skipped_bits |   f_bits   | / / / / / / / / / / |
  +-------------------------------------------------+

The current logic determines the size of the sub-piece to operate on by
limiting the piece size to the bit size of f and then subtracting the
skipped bits:

  min (piece_size, f_bits) - skipped_bits

Instead of:

  min (piece_size - skipped_bits, f_bits)

So the resulting sub-piece size is corrupted, leading to wrong handling of
this piece in write_pieced_value.

Note that the same bug was already found in read_pieced_value and fixed
there (but not in write_pieced_value), see PR 15391.

This patch swaps the calculations, bringing them into the same (correct)
order as in read_pieced_value.

gdb/ChangeLog:

* dwarf2loc.c (write_pieced_value): Fix order of calculations for
size capping.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/var-pieces.exp: Add test case for modifying a
variable at nonzero offset.

7 years agoAdd test for modifiable DWARF locations
Andreas Arnez [Tue, 13 Jun 2017 13:20:25 +0000 (15:20 +0200)]
Add test for modifiable DWARF locations

This adds a test for read/write access to variables with various types of
DWARF locations.  It uses register- and memory locations and composite
locations with register- and memory pieces.

Since the new test calls gdb_test_no_output with commands that contain
braces, it is necessary for string_to_regexp to quote braces as well.
This was not done before.

gdb/testsuite/ChangeLog:

* gdb.dwarf2/var-access.c: New file.
* gdb.dwarf2/var-access.exp: New test.
* lib/gdb-utils.exp (string_to_regexp): Quote braces as well.

7 years agoPrevent a call to abort when a relocatable link encounters a relocation against a...
Nick Clifton [Tue, 13 Jun 2017 13:03:16 +0000 (14:03 +0100)]
Prevent a call to abort when a relocatable link encounters a relocation against a symbol in a section removed by garbage collection.

PR ld/21524
* elflink.c (elf_link_adjust_relocs): Generate an error when
encountering a reloc against a symbol removed by garbage
collection.

7 years agoMove initialize_tdesc_mips* calls from mips-linux-nat.c to mips-linux-tdep.c
Yao Qi [Tue, 13 Jun 2017 08:05:04 +0000 (09:05 +0100)]
Move initialize_tdesc_mips* calls from mips-linux-nat.c to mips-linux-tdep.c

All target descriptions except mips initialization are called in -tdep.c,
instead of -nat.c, so this patch moves mips target descriptions
initialization to -tdep.c.  Secondly, I want to change the target
descriptions from pre-generated to dynamical creation, so I want to test
that these pre-generated target descriptions equal to these dynamically
created ones.  Move target descriptions initialization to -tdep.c files so
we can test them in any hosts (if they are still -nat.c, we can only test
them on mips-linux host.).

gdb:

2017-06-13  Yao Qi  <yao.qi@linaro.org>

* mips-linux-nat.c: Move include features/mips*-linux.c to
mips-linux-tdep.c.
(_initialize_mips_linux_nat): Move initialize_tdesc_mips* calls
to mips-linux-tdep.c.
* mips-linux-tdep.c: Include features/mips*-linux.c
(_initialize_mips_linux_tdep): Call initialize_tdesc_mips*
functions.
* mips-linux-tdep.h (tdesc_mips_linux): Declare.
(tdesc_mips_dsp_linux, tdesc_mips64_linux): Declare.
(tdesc_mips64_dsp_linux): Declare.

7 years agoAutomatic date update in version.in
GDB Administrator [Tue, 13 Jun 2017 00:00:43 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoAdd some 128-bit integer tests
Tom Tromey [Fri, 2 Jun 2017 12:54:06 +0000 (06:54 -0600)]
Add some 128-bit integer tests

This adds some tests for printing 128-bit integers.

2017-06-12  Tom Tromey  <tom@tromey.com>

* gdb.dwarf2/formdata16.exp: Add tests.

7 years agoRemove val_print_type_code_int
Tom Tromey [Mon, 22 May 2017 22:55:18 +0000 (16:55 -0600)]
Remove val_print_type_code_int

Now that print_scalar_formatted is more capable, there's no need for
val_print_type_code_int.  This patch removes it in favor of
val_print_scalar_formatted.

2017-06-12  Tom Tromey  <tom@tromey.com>

* valprint.h (val_print_type_code_int): Remove.
* valprint.c (generic_val_print_int): Always call
val_print_scalar_formatted.
(val_print_type_code_int): Remove.
* printcmd.c (print_scalar_formatted): Handle options->format==0.
* f-valprint.c (f_val_print): Use val_print_scalar_formatted.
* c-valprint.c (c_val_print_int): Use val_print_scalar_formatted.
* ada-valprint.c (ada_val_print_num): Use
val_print_scalar_formatted.

7 years agoSimplify print_scalar_formatted
Tom Tromey [Tue, 23 May 2017 00:43:59 +0000 (18:43 -0600)]
Simplify print_scalar_formatted

This unifies the two switches in print_scalar_formatted, removing some
now-redundant code.  Now scalar types are never converted to LONGEST,
instead printing is done using print_*_chars, operating on the byte
representation.

ChangeLog
2017-06-12  Tom Tromey  <tom@tromey.com>

* printcmd.c (print_scalar_formatted): Unify the two switches.
Don't convert scalars to LONGEST.

2017-06-12  Tom Tromey  <tom@tromey.com>

* gdb.arch/altivec-regs.exp: Expect decimal results for uint128.

7 years agoLet print_decimal_chars handle signed values
Tom Tromey [Mon, 22 May 2017 22:32:25 +0000 (16:32 -0600)]
Let print_decimal_chars handle signed values

This changes print_decimal_chars to handle signed values.

gdb/ChangeLog
2017-06-12  Tom Tromey  <tom@tromey.com>

PR exp/16225:
* valprint.h (print_decimal_chars): Update.
* valprint.c (maybe_negate_by_bytes): New function.
(print_decimal_chars): Add "is_signed" argument.
* printcmd.c (print_scalar_formatted): Update.

7 years agoDon't always zero pad in print_*_chars
Tom Tromey [Mon, 22 May 2017 09:55:58 +0000 (03:55 -0600)]
Don't always zero pad in print_*_chars

This changes print_octal_chars and print_decimal_chars to never zero
pad, and changes print_binary_chars and print_hex_chars to only
optionally zero-pad, based on a flag.

ChangeLog
2017-06-12  Tom Tromey  <tom@tromey.com>

PR exp/16225:
* valprint.h (print_binary_chars, print_hex_chars): Update.
* valprint.c (val_print_type_code_int): Update.
(print_binary_chars): Add "zero_pad" argument.
(emit_octal_digit): New function.
(print_octal_chars): Don't zero-pad.
(print_decimal_chars): Likewise.
(print_hex_chars): Add "zero_pad" argument.
* sh64-tdep.c (sh64_do_fp_register): Update.
* regcache.c (regcache::dump): Update.
* printcmd.c (print_scalar_formatted): Update.
* infcmd.c (default_print_one_register_info): Update.

2017-06-12  Tom Tromey  <tom@tromey.com>

PR exp/16225:
* gdb.reverse/i386-sse-reverse.exp: Update tests.
* gdb.arch/vsx-regs.exp: Update tests.
* gdb.arch/s390-vregs.exp (hex128): New proc.
Update test.
* gdb.arch/altivec-regs.exp: Update tests.

7 years agomips-tdep.c: Remove MAX_REGISTER_SIZE usage
Pedro Alves [Mon, 12 Jun 2017 18:04:52 +0000 (19:04 +0100)]
mips-tdep.c: Remove MAX_REGISTER_SIZE usage

mips_eabi_push_dummy_call is storing the address of a struct in a
buffer that must have the same of the confisued/set ABI register size.
Add a define for the maximum ABI size and use it to size the local
buffer.  Also rename the 'regsize' local to 'abi_regsize' for clarity.

Tested that --enable-targets=all still builds.

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>
    Alan Hayward  <alan.hayward@arm.com>

* mips-tdep.c (MAX_MIPS_ABI_REGSIZE): New.
(mips_eabi_push_dummy_call): Rename local 'regsize' to
'abi_regsize'.  Rename local array 'valbuf' to 'ref_valbuf', and
use MAX_MIPS_ABI_REGSIZE instead of MAX_REGISTER_SIZE to size it.
Assert that abi_regsize bytes fit in 'ref_valbuf'.

7 years ago.gdb_index prod perf regression: mapped_symtab now vector of values
Pedro Alves [Mon, 12 Jun 2017 01:51:52 +0000 (02:51 +0100)]
.gdb_index prod perf regression: mapped_symtab now vector of values

... instead of vector of pointers

There's no real reason for having mapped_symtab::data be a vector of
heap-allocated symtab_index_entries.  symtab_index_entries is not that
large, it's movable, and it's cheap to move.  Making the vector hold
values instead improves cache locality and eliminates many roundtrips
to the heap.

Using the same test as in the previous patch, against the same gdb
inferior, timing improves ~13% further:

  ~6.0s => ~5.2s (average of 5 runs).

Note that before the .gdb_index C++ifycation patch, we were at ~5.7s.
We're now consistenly better than before.

gdb/ChangeLog
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (mapped_symtab::data): Now a vector of
symtab_index_entry instead of vector of
std::unique_ptr<symtab_index_entry>.  All users adjusted to check
whether an element's name is NULL instead of checking whether the
element itself is NULL.
(find_slot): Change return type.  Adjust.
(hash_expand, , add_index_entry, uniquify_cu_indices)
(write_hash_table): Adjust.

7 years ago.gdb_index prod perf regression: Estimate size of psyms_seen
Pedro Alves [Mon, 12 Jun 2017 01:40:18 +0000 (02:40 +0100)]
.gdb_index prod perf regression: Estimate size of psyms_seen

Using the same test as the previous patch, perf shows GDB spending
over 7% in "free".  A substantial number of those calls comes from
insertions in the psyms_seen unordered_set causing lots of rehashing
and recreating buckets.  Fix this by computing an estimate of the size
of the set upfront.

Using the same test as in the previous patch, against the same gdb
inferior, timing improves ~8% further:

  ~6.5s => ~6.0s (average of 5 runs).

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (recursively_count_psymbols): New function.
(write_psymtabs_to_index): Call it to compute number of psyms and
pass estimate size of psyms_seen to unordered_set's ctor.

7 years ago.gdb_index prod perf regression: find before insert in unordered_map
Pedro Alves [Sun, 11 Jun 2017 23:49:51 +0000 (00:49 +0100)]
.gdb_index prod perf regression: find before insert in unordered_map

"perf" shows the unordered_map::emplace call in write_hash_table a bit
high up on profiles.  Fix this using the find + insert idiom instead
of going straight to insert.

I tried doing the same to the other unordered_maps::emplace calls in
the file, but saw no performance improvement, so left them be.

With a '-g3 -O2' build of gdb, and:

  $ cat save-index.cmd
  set $i = 0
  while $i < 100
    save gdb-index .
    set $i = $i + 1
  end
  $ time ./gdb -data-directory=data-directory -nx --batch -q -x save-index.cmd  ./gdb.pristine

I get an improvement of ~7%:

  ~7.0s => ~6.5s (average of 5 runs).

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (write_hash_table): Check if key already exists
before emplacing.

7 years agoCode cleanup: dwarf2read.c: Add data_buf::append_uint
Pedro Alves [Sat, 10 Jun 2017 15:51:14 +0000 (16:51 +0100)]
Code cleanup: dwarf2read.c: Add data_buf::append_uint

This avoids having to specify the integer size twice in the same line.

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (data_buf::append_space): Rename to...
(data_buf::grow): ... this, and make private.  Adjust all callers.
(data_buf::append_uint): New method.
(add_address_entry, write_one_signatured_type)
(write_psymtabs_to_index): Use it.

7 years agoCode cleanup: dwarf2read.c: Eliminate ::file_write
Pedro Alves [Fri, 9 Jun 2017 23:53:00 +0000 (00:53 +0100)]
Code cleanup: dwarf2read.c: Eliminate ::file_write

There's no real need for all this indirection.

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (file_write(FILE *, const void *, size_t)): Delete.
(file_write (FILE *, const std::vector<Elem>&)): Delete.
(data_buf::file_write): Call ::fwrite directly.

7 years agoCode cleanup: dwarf2read.c:uniquify_cu_indices: Use std::unique
Pedro Alves [Sun, 11 Jun 2017 23:43:55 +0000 (00:43 +0100)]
Code cleanup: dwarf2read.c:uniquify_cu_indices: Use std::unique

gdb/ChangeLog:
2017-06-12  Pedro Alves  <palves@redhat.com>

* dwarf2read.c (uniquify_cu_indices): Use std::unique and
std::vector::erase.

7 years agoCode cleanup: C++ify .gdb_index producer
Jan Kratochvil [Mon, 12 Jun 2017 15:29:53 +0000 (16:29 +0100)]
Code cleanup: C++ify .gdb_index producer

gdb/ChangeLog
2017-06-12  Jan Kratochvil  <jan.kratochvil@redhat.com>

Code cleanup: C++ify .gdb_index producer.
* dwarf2read.c: Include <unordered_set> and <unordered_map>.
(MAYBE_SWAP) [WORDS_BIGENDIAN]: Cast to offset_type.
(struct strtab_entry, hash_strtab_entry, eq_strtab_entry)
(create_strtab, add_string): Remove.
(file_write, data_buf): New.
(struct symtab_index_entry): Use std::vector for cu_indices.
(struct mapped_symtab): Use std::vector for data.
(hash_symtab_entry, eq_symtab_entry, delete_symtab_entry)
(create_symbol_hash_table, create_mapped_symtab, cleanup_mapped_symtab):
Remove.
(find_slot): Change return type.  Update it to the new data structures.
(hash_expand, add_index_entry): Update it to the new data structures.
(offset_type_compare): Remove.
(uniquify_cu_indices): Update it to the new data structures.
(c_str_view, c_str_view_hasher, vector_hasher): New.
(add_indices_to_cpool): Remove.
(write_hash_table): Update it to the new data structures.
(struct psymtab_cu_index_map, hash_psymtab_cu_index)
(eq_psymtab_cu_index): Remove.
(psym_index_map): New typedef.
(struct addrmap_index_data): Change addr_obstack pointer to data_buf
reference and std::unordered_map for cu_index_htab.
(add_address_entry, add_address_entry_worker, write_address_map)
(write_psymbols): Update it to the new data structures.
(write_obstack): Remove.
(struct signatured_type_index_data): Change types_list to a data_buf
reference and psyms_seen to a std::unordered_set reference.
(write_one_signatured_type, recursively_write_psymbols)
(write_psymtabs_to_index): Update it to the new data structures.

7 years agoELF: Pass bfd_link_info to merge_gnu_properties
H.J. Lu [Mon, 12 Jun 2017 14:37:15 +0000 (07:37 -0700)]
ELF: Pass bfd_link_info to merge_gnu_properties

Pass struct bfd_link_info * to merge_gnu_properties to give backend
control of how GNU properties are merged based on linker command line
options.

* elf-bfd.h (elf_backend_data): Add struct bfd_link_info *
to merge_gnu_properties.
* elf-properties.c (elf_merge_gnu_properties): Add struct
bfd_link_info * and pass it to merge_gnu_properties.
(elf_merge_gnu_property_list): Add struct bfd_link_info *
and pass it to elf_merge_gnu_properties.
(_bfd_elf_link_setup_gnu_properties): Pass info to
elf_merge_gnu_property_list.
* elf32-i386.c (elf_i386_merge_gnu_properties): Add struct
bfd_link_info *.
* elf64-x86-64.c (elf_x86_64_merge_gnu_properties): Likewise.

7 years agoS/390: Return with an error for broken tls rewrites
Andreas Krebbel [Fri, 9 Jun 2017 09:19:01 +0000 (11:19 +0200)]
S/390: Return with an error for broken tls rewrites

bfd/ChangeLog:

2017-06-12  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

* elf32-s390.c (elf_s390_relocate_section): Return false in case
the rewriting fails.
* elf64-s390.c (elf_s390_relocate_section): Likewise.

7 years agoAutomatic date update in version.in
GDB Administrator [Mon, 12 Jun 2017 00:00:38 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoIntroduce "set debug separate-debug-file"
Simon Marchi [Sun, 11 Jun 2017 21:16:01 +0000 (23:16 +0200)]
Introduce "set debug separate-debug-file"

I helped someone figure out why their separate debug info (debug
link-based) was not found by gdb.  It turns out that the debug file was
not named properly.  It made me realize that it is quite difficult to
diagnose this kind of problems.  This patch adds some debug output to
show where GDB looks for those files, so that it should be (more)
obvious to find what's wrong.

Here's an example of the result, first with an example of unsuccessful lookup,
and then a successful one.

  (gdb) set debug separate-debug-file on
  (gdb) file /usr/bin/gnome-calculator
  Reading symbols from /usr/bin/gnome-calculator...
  Looking for separate debug info (build-id) for /usr/bin/gnome-calculator
    Trying /usr/local/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug

  Looking for separate debug info (debug link) for /usr/bin/gnome-calculator
    Trying /usr/bin/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
    Trying /usr/bin/.debug/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
    Trying /usr/local/lib/debug//usr/bin/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
  (no debugging symbols found)...done.
  (gdb) set debug-file-directory /usr/lib/debug
  (gdb) file /usr/bin/gnome-calculator
  Reading symbols from /usr/bin/gnome-calculator...
  Looking for separate debug info by build-id for /usr/bin/gnome-calculator
    Trying /usr/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug
  Reading symbols from /usr/lib/debug/.build-id/0d/5c5e8c86dbe4f4f95f7a13de04f91d377f3c6a.debug...done.
  done.

Note: here, the debug link happens to be named like the build-id, but it
doesn't have to be this way.  It puzzled me for a minute.

gdb/ChangeLog:

* NEWS (Changes since GDB 8.0): Announce {set,show} debug
separate-debug-file commands.
* symfile.h (separate_debug_file_debug): New global.
* symfile.c (separate_debug_file_debug): New global.
(separate_debug_file_exists, find_separate_debug_file): Add
debug output.
(_initialize_symfile): Add "set debug separate-debug-file"
command.
* build-id.c (build_id_to_debug_bfd,
find_separate_debug_file_by_buildid): Add debug output.

gdb/doc/ChangeLog:

* gdb.texinfo (Optional Messages about Internal Happenings):
Document {set,show} debug separate-debug-file commands.

7 years agoPR 21564, Section start in binary output file incorrect
Alan Modra [Sun, 11 Jun 2017 04:04:13 +0000 (13:34 +0930)]
PR 21564, Section start in binary output file incorrect

PR 21564
* binary.c (binary_set_section_contents): Scale lma by octets
per byte to set filepos.

7 years agoAutomatic date update in version.in
GDB Administrator [Sun, 11 Jun 2017 00:00:44 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoAutomatic date update in version.in
GDB Administrator [Sat, 10 Jun 2017 00:00:43 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agogdbarch: Remove displaced_step_free_closure
Simon Marchi [Fri, 9 Jun 2017 22:24:05 +0000 (00:24 +0200)]
gdbarch: Remove displaced_step_free_closure

The displaced_step_free_closure gdbarch hook allows architectures to
free data they might have allocated to complete a displaced step.
However, all architectures using that hook use the
simple_displaced_step_free_closure provided in arch-utils.{c,h}, which
does a simple xfree.  We can remove it and do an xfree directly instead
of calling the hook.

gdb/ChangeLog:

* gdbarch.sh (displaced_step_free_closure): Remove.
* gdbarch.h, gdbarch.c: Re-generate.
* aarch64-linux-tdep.c (aarch64_linux_init_abi): Don't set
displaced_step_free_closure.
* amd64-linux-tdep.c (amd64_linux_init_abi_common): Likewise.
* arm-linux-tdep.c (arm_linux_init_abi): Likewise.
* i386-linux-tdep.c (i386_linux_init_abi): Likewise.
* rs6000-aix-tdep.c (rs6000_aix_init_osabi): Likewise.
* rs6000-tdep.c (rs6000_gdbarch_init): Likewise.
* s390-linux-tdep.c (s390_gdbarch_init): Likewise.
* arch-utils.h (simple_displaced_step_free_closure): Remove.
* arch-utils.c (simple_displaced_step_free_closure): Remove.
* infrun.c (displaced_step_clear): Call xfree instead of
gdbarch_displaced_step_free_closure.

7 years agoInclude <signal.h> on gdbserver/fork-child.c (and fix regressions)
Sergio Durigan Junior [Fri, 9 Jun 2017 22:16:19 +0000 (18:16 -0400)]
Include <signal.h> on gdbserver/fork-child.c (and fix regressions)

Hi,

This is another obvious patch that fixes a thinko from my previous
startup-with-shell series.  We should conditionally include <signal.h>
on gdb/gdbserver/fork-child.c because gdbserver will be putting the
inferior's terminal on the correct mode after the call to
fork_inferior, and for that it needs to ignore SIGTTOU.

This patch fixes a bunch of regressions happening on AArch64 that were
reported by Yao.

gdb/gdbserver/ChangeLog:
2017-06-09  Sergio Durigan Junior  <sergiodj@redhat.com>

* fork-child.c: Conditionally include <signal.h>.

7 years agox86-64: Add some x32 ELF property tests
H.J. Lu [Fri, 9 Jun 2017 17:43:43 +0000 (10:43 -0700)]
x86-64: Add some x32 ELF property tests

* testsuite/ld-x86-64/property-x86-3-x32.d: New file.
* testsuite/ld-x86-64/property-x86-4a-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-4b-x32.d: Likewise.
* testsuite/ld-x86-64/property-x86-3.d: Also pass
-defsym __64_bit__=1 to asssembler.
* testsuite/ld-x86-64/property-x86-4a.d: Likewise.
* testsuite/ld-x86-64/property-x86-4b.d: Likewise.
* testsuite/ld-x86-64/property-x86-3.s: Align to 4 bytes if
__64_bit__ isn't defined.
* testsuite/ld-x86-64/property-x86-4a.s: Likewise.
* testsuite/ld-x86-64/property-x86-4b.s: Likewise.
* testsuite/ld-x86-64/x86-64.exp: Run property-x86-3-x32,
property-x86-4a-x32 and property-x86-4b-x32.

7 years agoRevert "[AArch64] Allow COPY relocation elimination"
Jiong Wang [Fri, 9 Jun 2017 11:02:05 +0000 (12:02 +0100)]
Revert "[AArch64] Allow COPY relocation elimination"

This reverts commit bc327528fd2ccdc6c29ab6ae608085dddbad5cc8.

This patch can only be committed after PC-relative relocation types
support on copy relocation elimination is also completed.

7 years agoAutomatic date update in version.in
GDB Administrator [Fri, 9 Jun 2017 00:00:44 +0000 (00:00 +0000)]
Automatic date update in version.in

7 years agoFix possible bug when no args have been provided to the executable
Sergio Durigan Junior [Thu, 8 Jun 2017 20:58:25 +0000 (16:58 -0400)]
Fix possible bug when no args have been provided to the executable

Hi,

This bug is related to:

  <https://sourceware.org/ml/gdb-patches/2017-06/msg00216.html>

On stringify_argv, we have to check if args[0] is not NULL before
stringifying anything, otherwise we might do the wrong thing when
trimming the "ret" string in the end.  args[0] will be NULL when no
arguments are passed to the inferior that will be started.

Checked in as obvious.

gdb/ChangeLog:
2017-06-08  Sergio Durigan Junior  <sergiodj@redhat.com>

* common/common-utils.c (stringify_argv): Check for "arg[0] !=
NULL".

7 years ago[ARC] Corrected conditions for dynamic sections creation.
Cupertino Miranda [Tue, 23 May 2017 11:36:33 +0000 (13:36 +0200)]
[ARC] Corrected conditions for dynamic sections creation.

Fixed conditions to create the dynamic sections.
Previously there would be times where the dynamic sections would not be created
although they were actually required for linking to work.

Issue found through OpenADK build, more precisely the ublicb testsuite package.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

elf32-arc.c (elf_arc_check_relocs): Fixed conditions to generate
dynamic sections.

7 years ago[ARC] Fixed condition to generate TEXTREL.
Cupertino Miranda [Wed, 5 Apr 2017 21:22:07 +0000 (23:22 +0200)]
[ARC] Fixed condition to generate TEXTREL.

TEXTREL was being generated even when relocatable .o files had the .rela.text
section. Now it is limitted only to dynamic object files that still have them.
Nevertheless, our target aborts in those cases due to architecture limitations
where icache is not coherent with dcache, and to force this coherence expensive
kernel level support would be needed.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

* elf32-arc.c (elf_arc_size_dynamic_sections): Changed condition to
require TEXTREL.

7 years ago[ARC] Fixed TLS for IE model.
Cupertino Miranda [Thu, 29 Dec 2016 16:10:01 +0000 (17:10 +0100)]
[ARC] Fixed TLS for IE model.

In the case of static relocation, the GOT entries are fixed at link time
and are set by the linker.
In order to compute the right TLS offset it is necessary to add TCB_SIZE
to the offset, just in case the dynamic linker is not expected to be
executed (static linked case).
This problem does appear in dynamic linked applications, as the dynamic
linker is adding this TCB_SIZE by operating the TCB block structure.

Problem revealed in GLIBC with static linking.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

arc-got.h (relocate_fix_got_relocs_for_got_info): Added TCB_SIZE to
patched section contents for TLS IE reloc.
elf32-arc.c: Remove TCB_SIZE preprocessor macro.

Rebase to 0006

7 years ago[ARC] Add RELOC_FOR_GLOBAL_SYMBOL in ARC target code.
Cupertino Miranda [Wed, 30 Nov 2016 19:23:21 +0000 (20:23 +0100)]
[ARC] Add RELOC_FOR_GLOBAL_SYMBOL in ARC target code.

This miss was identified in the context of openssh building for ARC.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

elf32-arc.c (elf_arc_relocate_section): Added "call" to
RELOC_FOR_GLOBAL_SYMBOL macro.

7 years ago[ARC] ARC_PC32 dynamic reloc incorrectly generated.
Cupertino Miranda [Wed, 30 Nov 2016 13:07:20 +0000 (14:07 +0100)]
[ARC] ARC_PC32 dynamic reloc incorrectly generated.

Fixed issue related to the generation of ARC_PC32 dynamic relocs when symbol
is dynamic but still defined in a non shared object.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

elf32-arc.c (elf_arc_relocate_section): Small refactor and condition
changes.

7 years ago[ARC] Don't convert _DYNAMIC@ to _GLOBAL_OFFSET_TABLE_
Vineet Gupta [Mon, 30 May 2016 09:49:22 +0000 (15:19 +0530)]
[ARC] Don't convert _DYNAMIC@ to _GLOBAL_OFFSET_TABLE_

Historically the arc abi demanded that a GOT[0] should be referencible as
[pc+_DYNAMIC@gotpc].  Hence we convert a _DYNAMIC@gotpc to a GOTPC reference to
_GLOBAL_OFFSET_TABLE_.

This is no longer the case and uClibc and upcomming GNU libc don't expect this
to happen.

gas/ChangeLog:

    Vineet Gupta  <vgupta@synopsys.com>
    Cupertino Miranda  <cmiranda@synopsys.com>

* config/tc-arc.c (md_undefined_symbol): Changed.
* config/tc-arc.h (DYNAMIC_STRUCT_NAME): Removed.

7 years ago[ARC] Reassign the symbol got information to actual symbol when indirect.
Cupertino Miranda [Mon, 24 Oct 2016 20:19:48 +0000 (22:19 +0200)]
[ARC] Reassign the symbol got information to actual symbol when indirect.

GOT information would not be reassign to symbol when it became a indect
symbol.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

* elf32-arc.c (elf_arc_relocate_section): Fixed reassign of indirect
symbols.

7 years ago[ARC] Disable warning on absolute relocs when symbol is local.
Cupertino Miranda [Mon, 24 Oct 2016 10:52:04 +0000 (12:52 +0200)]
[ARC] Disable warning on absolute relocs when symbol is local.

R_ARC_32 and R_ARC_32_ME cannot be generated as dynamic relocs.
However, a warning message and check_relocs was aborting when this type of
reloc was being resolved to a local symbol.
This is wrong as local symbols are resolvable at link time.

bfd/ChangeLog:

    Cupertino Miranda  <cmiranda@synopsys.com>

* elf32-arc.c (elf_arc_check_relocs): Added condition to disable
warning and "Bad value" for local symbols ARC_32 or ARC_32_ME relocs.

7 years ago[ARC] Avoid creating dynamic relocs when static linked is requested.
Cupertino Miranda [Wed, 7 Dec 2016 13:22:54 +0000 (14:22 +0100)]
[ARC] Avoid creating dynamic relocs when static linked is requested.

bfd/Changelog:

    Cupertino Miranda  <cmiranda@synopsys.com>

* elf32-arc.c (ADD_RELA): Changed to only work when dynamic object is
created.