[Qemu-arm] [PATCH v6 0/6] linux-user/aarch64: Support PROT_BTI

[Richard Henderson]

Dave Martin has recently posted a kernel patch set for 
supporting ARMv8.5 Branch Target Identification in userland.

  http://lists.infradead.org/pipermail/linux-arm-kernel/2019-May/654654.html

While that support is not yet in the upstream kernel, it looks
to be close to its final form.  Note that the patch set spells
this PROT_BTI_GUARDED, but review suggested to rename to PROT_BTI.

Changes since v5:
  * New function to validate the target PROT parameter for mmap/mprotect.
  * Require BTI in the cpu for PROT_BTI set.
  * Set PSTATE.BTYPE=2 for the signal handler.
    Adjust the smoke test to match.
  * Tidy up the note parsing.


r~


Richard Henderson (6):
  linux-user/aarch64: Reset btype for syscalls and signals
  linux-user: Validate mmap/mprotect prot value
  linux-user: Set PAGE_TARGET_1 for TARGET_PROT_BTI
  include/elf: Add defines related to notes for GNU systems
  linux-user: Parse NT_GNU_PROPERTY_TYPE_0 notes
  tests/tcg/aarch64: Add bti smoke test

 include/elf.h                     |  48 ++++++++++++
 include/exec/cpu-all.h            |   2 +
 linux-user/syscall_defs.h         |   4 +
 linux-user/aarch64/cpu_loop.c     |   7 ++
 linux-user/aarch64/signal.c       |  10 ++-
 linux-user/elfload.c              |  83 ++++++++++++++++++--
 linux-user/mmap.c                 | 122 ++++++++++++++++++++++--------
 target/arm/translate-a64.c        |   6 +-
 tests/tcg/aarch64/bti-1.c         |  77 +++++++++++++++++++
 tests/tcg/aarch64/bti-crt.inc.c   |  69 +++++++++++++++++
 tests/tcg/aarch64/Makefile.target |   3 +
 11 files changed, 387 insertions(+), 44 deletions(-)
 create mode 100644 tests/tcg/aarch64/bti-1.c
 create mode 100644 tests/tcg/aarch64/bti-crt.inc.c

-- 
2.17.1