[COMMITTED, V2 0/5] SFrame: add support for .cfi_b_key_frame

[Indu Bhagat]

[Changes from V1]
  - Rebased on latest trunk.
  - Fixed the testcase as we now emit "[s]" marker for both mangled RA in
  register and stack.
[End of changes in V1]

Thanks

----------------------

Hello,

This patchset adds support for handling the .cfi_b_key_frame assembler
directive to the SFrame format: SFrame format representation now allows to
encode which of the pauth A key / B key are used (for signing return
addresses on aarch64), and gas, readelf/objdump now allow for generation
and textual dump of this information.

Testing notes:

- Regression tested cross build of several targets on an x86_64 host and an
aarch64 host using a regression script that checks for failures in gas, ld,
binutils, libctf and libsframe.
- Regression tested native builds on x86_64 and aarch64.
- binutils/gdb try bot showed no new regressions.

Thanks,
Indu Bhagat (5):
  [1/5] sframe.h: add support for .cfi_b_key_frame
  [2/5] gas: sframe: add support for .cfi_b_key_frame
  [3/5] objdump/readelf: sframe: emit marker for SFrame FDE with B key
  [4/5] gas: sframe: testsuite: add testcase for .cfi_b_key_frame
  [5/5] sframe: doc: update documentation for pauth key in SFrame FDE

 gas/gen-sframe.c                              | 26 +++++++++++---
 gas/gen-sframe.h                              |  2 +-
 gas/sframe-opt.c                              |  3 ++
 .../cfi-sframe-aarch64-pac-ab-key-1.d         | 27 ++++++++++++++
 .../cfi-sframe-aarch64-pac-ab-key-1.s         | 36 +++++++++++++++++++
 gas/testsuite/gas/cfi-sframe/cfi-sframe.exp   |  1 +
 include/sframe.h                              | 25 +++++++++----
 libsframe/doc/sframe-spec.texi                |  8 ++++-
 libsframe/sframe-dump.c                       | 19 ++++++++++
 9 files changed, 135 insertions(+), 12 deletions(-)
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-pac-ab-key-1.d
 create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-pac-ab-key-1.s

-- 
2.37.2