[V3,00/15] Definition and support for SFrame unwind format

  Since the V2 was approved, there have been some changes to the patch series.
Each patch has brief notes on the respective changes from V2.  Here is a
combined summary:
  - V3 has some bugfixes.  It was noticed that unwinding on aarch64 had issues
  with -fomit-frame-pointer.  Fixed now.  Added new unwinder testcases around
  the same.
  - Addressed review comments by Mike on libsframe/ and gdb/ builsystem.

Posting a V3 for the complete set.

PS: libsframe/configure has been REMOVED from the patch series, as it causes
the size of some patches to go beyond the allowed limit.  Please regenerate
libsframe/configure after applying the series.

Testing notes:
 - Regression tested natively on x86_64-linux, aarch64-linux and i686-linux with
 '--enable-shared'.
 - Cross builds for various targets on x86_64 host, and some targets on aarch64
 host.  Ran a regression script that checks for failures in gas, ld, binutils,
 libctf with no reported regressions.  libsframe tests ran as expected.
 libsframebt (the backtracer) tests (which are present in
 libsframe/testsuite/libsframe.unwind) have been disabled with host != target.

Thanks,

Indu Bhagat (12):
  sframe.h: Add SFrame format definition
  gas: add new command line option --gsframe
  gas: generate .sframe from CFI directives
  gas: testsuite: add new tests for SFrame unwind info
  bfd: linker: merge .sframe sections
  readelf/objdump: support for SFrame section
  gdb: sim: buildsystem changes to accommodate libsframe
  libctf: add libsframe to LDFLAGS and LIBS
  src-release.sh: Add libsframe
  binutils/NEWS: add text for SFrame support
  gas/NEWS: add text about new command line option and SFrame support
  doc: add SFrame spec file

Weimin Pan (3):
  libsframe: add the SFrame library
  unwinder: generate backtrace using SFrame format
  unwinder: Add SFrame unwinder tests

 Makefile.def                                  |    6 +
 Makefile.in                                   | 1299 ++++++++++++-
 bfd/Makefile.am                               |    6 +-
 bfd/Makefile.in                               |    7 +-
 bfd/bfd-in2.h                                 |    1 +
 bfd/configure                                 |    2 +-
 bfd/configure.ac                              |    2 +-
 bfd/elf-bfd.h                                 |   54 +
 bfd/elf-sframe.c                              |  544 ++++++
 bfd/elf.c                                     |   32 +
 bfd/elf64-x86-64.c                            |   97 +-
 bfd/elflink.c                                 |   52 +
 bfd/elfxx-x86.c                               |  375 +++-
 bfd/elfxx-x86.h                               |   49 +
 bfd/section.c                                 |    1 +
 binutils/Makefile.am                          |   10 +-
 binutils/Makefile.in                          |    9 +-
 binutils/NEWS                                 |    3 +
 binutils/doc/binutils.texi                    |    4 +
 binutils/doc/sframe.options.texi              |   10 +
 binutils/objdump.c                            |   75 +
 binutils/readelf.c                            |   64 +
 config/dejagnu.m4                             |   22 +
 config/sframe.m4                              |   16 +
 configure                                     |    2 +-
 configure.ac                                  |    2 +-
 gas/Makefile.am                               |    3 +
 gas/Makefile.in                               |   22 +-
 gas/NEWS                                      |    3 +
 gas/as.c                                      |   10 +-
 gas/as.h                                      |   13 +-
 gas/config/tc-aarch64.c                       |   52 +
 gas/config/tc-aarch64.h                       |   29 +
 gas/config/tc-i386.c                          |   44 +
 gas/config/tc-i386.h                          |   26 +
 gas/config/tc-xtensa.c                        |    1 +
 gas/doc/as.texi                               |   20 +-
 gas/dw2gencfi.c                               |   30 +
 gas/dw2gencfi.h                               |    1 +
 gas/gen-sframe.c                              | 1306 +++++++++++++
 gas/gen-sframe.h                              |  141 ++
 gas/sframe-opt.c                              |  158 ++
 .../gas/cfi-sframe/cfi-sframe-aarch64-1.d     |   20 +
 .../gas/cfi-sframe/cfi-sframe-aarch64-1.s     |   61 +
 .../gas/cfi-sframe/cfi-sframe-common-1.d      |   17 +
 .../gas/cfi-sframe/cfi-sframe-common-1.s      |    3 +
 .../gas/cfi-sframe/cfi-sframe-common-2.d      |   17 +
 .../gas/cfi-sframe/cfi-sframe-common-2.s      |    2 +
 .../gas/cfi-sframe/cfi-sframe-common-3.d      |   17 +
 .../gas/cfi-sframe/cfi-sframe-common-3.s      |    4 +
 .../gas/cfi-sframe/cfi-sframe-common-4.d      |   21 +
 .../gas/cfi-sframe/cfi-sframe-common-4.s      |    8 +
 .../gas/cfi-sframe/cfi-sframe-common-5.d      |   21 +
 .../gas/cfi-sframe/cfi-sframe-common-5.s      |    7 +
 .../gas/cfi-sframe/cfi-sframe-common-6.d      |   21 +
 .../gas/cfi-sframe/cfi-sframe-common-6.s      |    7 +
 .../gas/cfi-sframe/cfi-sframe-common-7.d      |   21 +
 .../gas/cfi-sframe/cfi-sframe-common-7.s      |    7 +
 .../gas/cfi-sframe/cfi-sframe-common-8.d      |   20 +
 .../gas/cfi-sframe/cfi-sframe-common-8.s      |   12 +
 .../gas/cfi-sframe/cfi-sframe-x86_64-1.d      |   22 +
 .../gas/cfi-sframe/cfi-sframe-x86_64-1.s      |   30 +
 gas/testsuite/gas/cfi-sframe/cfi-sframe.exp   |   96 +
 gas/testsuite/gas/cfi-sframe/common-empty-1.d |   14 +
 gas/testsuite/gas/cfi-sframe/common-empty-1.s |    5 +
 gas/testsuite/gas/cfi-sframe/common-empty-2.d |   14 +
 gas/testsuite/gas/cfi-sframe/common-empty-2.s |    8 +
 gas/testsuite/gas/cfi-sframe/common-empty-3.d |   14 +
 gas/testsuite/gas/cfi-sframe/common-empty-3.s |    9 +
 gas/testsuite/gas/cfi-sframe/common-empty-4.d |   14 +
 gas/testsuite/gas/cfi-sframe/common-empty-4.s |   17 +
 gas/write.c                                   |   13 +
 gdb/Makefile.in                               |    7 +-
 gdb/acinclude.m4                              |    4 +-
 gdb/configure                                 |    8 +-
 include/elf/common.h                          |    1 +
 include/elf/internal.h                        |    1 +
 include/sframe-api.h                          |  234 +++
 include/sframe-backtrace-api.h                |   57 +
 include/sframe.h                              |  303 +++
 ld/Makefile.am                                |    2 +
 ld/Makefile.in                                |    2 +
 ld/configure                                  |    8 +-
 ld/configure.ac                               |    3 +
 ld/ld.texi                                    |    4 +-
 ld/scripttempl/elf.sc                         |    2 +
 ld/testsuite/ld-aarch64/aarch64-elf.exp       |    4 +
 ld/testsuite/ld-aarch64/sframe-bar.s          |    7 +
 ld/testsuite/ld-aarch64/sframe-foo.s          |   10 +
 ld/testsuite/ld-aarch64/sframe-simple-1.d     |   26 +
 ld/testsuite/ld-bootstrap/bootstrap.exp       |    8 +-
 ld/testsuite/ld-sframe/discard.d              |   10 +
 ld/testsuite/ld-sframe/discard.ld             |    9 +
 ld/testsuite/ld-sframe/discard.s              |   13 +
 ld/testsuite/ld-sframe/sframe-empty.d         |   10 +
 ld/testsuite/ld-sframe/sframe-empty.s         |    2 +
 ld/testsuite/ld-sframe/sframe.exp             |   47 +
 ld/testsuite/ld-x86-64/sframe-bar.s           |   31 +
 ld/testsuite/ld-x86-64/sframe-foo.s           |   37 +
 ld/testsuite/ld-x86-64/sframe-plt-1.d         |   29 +
 ld/testsuite/ld-x86-64/sframe-simple-1.d      |   35 +
 ld/testsuite/ld-x86-64/x86-64.exp             |    5 +
 ld/testsuite/lib/ld-lib.exp                   |   45 +
 libctf/configure                              |    4 +-
 libctf/configure.ac                           |    4 +-
 libsframe/Makefile.am                         |   58 +
 libsframe/Makefile.in                         | 1533 +++++++++++++++
 libsframe/aclocal.m4                          | 1243 ++++++++++++
 libsframe/config.h.in                         |  132 ++
 libsframe/configure.ac                        |  114 ++
 libsframe/doc/local.mk                        |   40 +
 libsframe/doc/sframe-spec.texi                |  619 ++++++
 libsframe/sframe-backtrace-err.c              |   46 +
 libsframe/sframe-backtrace.c                  |  626 ++++++
 libsframe/sframe-dump.c                       |  181 ++
 libsframe/sframe-error.c                      |   49 +
 libsframe/sframe-impl.h                       |   55 +
 libsframe/sframe.c                            | 1675 +++++++++++++++++
 libsframe/testsuite/config/default.exp        |   57 +
 libsframe/testsuite/lib/sframe-lib.exp        |  180 ++
 libsframe/testsuite/libsframe.decode/DATA-BE  |  Bin 0 -> 64 bytes
 libsframe/testsuite/libsframe.decode/DATA1    |  Bin 0 -> 60 bytes
 libsframe/testsuite/libsframe.decode/DATA2    |  Bin 0 -> 92 bytes
 .../testsuite/libsframe.decode/be-flipping.c  |  115 ++
 .../testsuite/libsframe.decode/decode.exp     |   50 +
 .../testsuite/libsframe.decode/frecnt-1.c     |   99 +
 .../testsuite/libsframe.decode/frecnt-2.c     |  104 +
 libsframe/testsuite/libsframe.decode/local.mk |   16 +
 .../testsuite/libsframe.encode/encode-1.c     |  177 ++
 .../testsuite/libsframe.encode/encode.exp     |   37 +
 libsframe/testsuite/libsframe.encode/local.mk |    7 +
 .../libsframe.unwind/backtrace-fp-attr-1.c    |  109 ++
 .../libsframe.unwind/backtrace-fp-attr-1.lk   |    4 +
 .../libsframe.unwind/backtrace-fp-attr-2.c    |  110 ++
 .../libsframe.unwind/backtrace-fp-attr-2.lk   |    4 +
 .../testsuite/libsframe.unwind/backtrace.c    |  145 ++
 .../testsuite/libsframe.unwind/backtrace.lk   |    3 +
 .../testsuite/libsframe.unwind/inline-cmds.c  |  136 ++
 .../testsuite/libsframe.unwind/inline-cmds.lk |    3 +
 libsframe/testsuite/libsframe.unwind/inline.c |   97 +
 .../testsuite/libsframe.unwind/inline.lk      |    3 +
 .../testsuite/libsframe.unwind/solib-lib1.c   |    8 +
 .../testsuite/libsframe.unwind/solib-lib1.h   |    3 +
 .../testsuite/libsframe.unwind/solib-lib2.c   |   51 +
 .../testsuite/libsframe.unwind/solib-lib2.h   |    3 +
 .../testsuite/libsframe.unwind/solib-main.c   |   47 +
 .../testsuite/libsframe.unwind/solib-main.d   |    3 +
 .../testsuite/libsframe.unwind/solib.exp      |   75 +
 .../testsuite/libsframe.unwind/tailcall.c     |  103 +
 .../testsuite/libsframe.unwind/tailcall.lk    |    3 +
 libsframe/testsuite/libsframe.unwind/ttest.c  |  127 ++
 libsframe/testsuite/libsframe.unwind/ttest.lk |    3 +
 .../testsuite/libsframe.unwind/unwind.exp     |  205 ++
 libsframe/testsuite/local.mk                  |   24 +
 sim/common/Make-common.in                     |    7 +-
 sim/ppc/Makefile.in                           |    5 +-
 src-release.sh                                |    4 +-
 157 files changed, 14549 insertions(+), 66 deletions(-)
 create mode 100644 bfd/elf-sframe.c
 create mode 100644 binutils/doc/sframe.options.texi
 create mode 100644 config/dejagnu.m4
 create mode 100644 config/sframe.m4
 create mode 100644 gas/gen-sframe.c
 create mode 100644 gas/gen-sframe.h
 create mode 100644 gas/sframe-opt.c
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-1.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-1.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-1.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-1.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-2.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-2.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-3.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-3.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-4.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-4.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-5.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-5.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-6.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-6.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-7.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-7.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-8.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-common-8.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-x86_64-1.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-x86_64-1.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe.exp
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-1.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-1.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-2.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-2.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-3.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-3.s
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-4.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-4.s
 mode change 100755 => 100644 gdb/configure
 create mode 100644 include/sframe-api.h
 create mode 100644 include/sframe-backtrace-api.h
 create mode 100644 include/sframe.h
 create mode 100644 ld/testsuite/ld-aarch64/sframe-bar.s
 create mode 100644 ld/testsuite/ld-aarch64/sframe-foo.s
 create mode 100644 ld/testsuite/ld-aarch64/sframe-simple-1.d
 create mode 100644 ld/testsuite/ld-sframe/discard.d
 create mode 100644 ld/testsuite/ld-sframe/discard.ld
 create mode 100644 ld/testsuite/ld-sframe/discard.s
 create mode 100644 ld/testsuite/ld-sframe/sframe-empty.d
 create mode 100644 ld/testsuite/ld-sframe/sframe-empty.s
 create mode 100644 ld/testsuite/ld-sframe/sframe.exp
 create mode 100644 ld/testsuite/ld-x86-64/sframe-bar.s
 create mode 100644 ld/testsuite/ld-x86-64/sframe-foo.s
 create mode 100644 ld/testsuite/ld-x86-64/sframe-plt-1.d
 create mode 100644 ld/testsuite/ld-x86-64/sframe-simple-1.d
 create mode 100644 libsframe/Makefile.am
 create mode 100644 libsframe/Makefile.in
 create mode 100644 libsframe/aclocal.m4
 create mode 100644 libsframe/config.h.in
 create mode 100644 libsframe/configure.ac
 create mode 100644 libsframe/doc/local.mk
 create mode 100644 libsframe/doc/sframe-spec.texi
 create mode 100644 libsframe/sframe-backtrace-err.c
 create mode 100644 libsframe/sframe-backtrace.c
 create mode 100644 libsframe/sframe-dump.c
 create mode 100644 libsframe/sframe-error.c
 create mode 100644 libsframe/sframe-impl.h
 create mode 100644 libsframe/sframe.c
 create mode 100644 libsframe/testsuite/config/default.exp
 create mode 100644 libsframe/testsuite/lib/sframe-lib.exp
 create mode 100644 libsframe/testsuite/libsframe.decode/DATA-BE
 create mode 100644 libsframe/testsuite/libsframe.decode/DATA1
 create mode 100644 libsframe/testsuite/libsframe.decode/DATA2
 create mode 100644 libsframe/testsuite/libsframe.decode/be-flipping.c
 create mode 100644 libsframe/testsuite/libsframe.decode/decode.exp
 create mode 100644 libsframe/testsuite/libsframe.decode/frecnt-1.c
 create mode 100644 libsframe/testsuite/libsframe.decode/frecnt-2.c
 create mode 100644 libsframe/testsuite/libsframe.decode/local.mk
 create mode 100644 libsframe/testsuite/libsframe.encode/encode-1.c
 create mode 100644 libsframe/testsuite/libsframe.encode/encode.exp
 create mode 100644 libsframe/testsuite/libsframe.encode/local.mk
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace-fp-attr-1.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace-fp-attr-1.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace-fp-attr-2.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace-fp-attr-2.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/backtrace.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/inline-cmds.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/inline-cmds.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/inline.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/inline.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-lib1.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-lib1.h
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-lib2.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-lib2.h
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-main.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib-main.d
 create mode 100644 libsframe/testsuite/libsframe.unwind/solib.exp
 create mode 100644 libsframe/testsuite/libsframe.unwind/tailcall.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/tailcall.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/ttest.c
 create mode 100644 libsframe/testsuite/libsframe.unwind/ttest.lk
 create mode 100644 libsframe/testsuite/libsframe.unwind/unwind.exp
 create mode 100644 libsframe/testsuite/local.mk