Merge remote-tracking branch 'remotes/bsdimp/tags/pull-bsd-user-20211018-pull-request' into staging

bsd-user pull request: merge dependencies for next architectures

Merge the dependencies for arm, aarch64, and riscv64 architectures. This joins
together two patch series:

[PATCH v2 00/15] bsd-user: misc cleanup for aarch64 import

Prepare for aarch64 support (the next architecture to be upstreamed). As the
aarch64 emulation is more complete, it relies on a number of different items.
In some cases, I've pulled in the full support from bsd-user fork. In other
cases I've created a simple stub (as is the case for signals, which have
independent changes pending, so I wanted to be as minimal as possible.  Since
all pre-12.2 support was purged from the bsd-user fork, go ahead and remove it
here. FreeBSD 11.x goes ouft of support at the end of the month. Remove what
little multi-version support that's in upstream.

and

[PATCH v3 0/9] bsd-user mmap fixes
This series synchronizes mmap.c with the bsd-user fork. This is a mix of old bug
fixes pulled in from linux-user, as well as some newer fixes to adress bugs
found in check-tcg and recent FreeBSD developments. There are also a couple of
style commits. Updated to migrate debugging to qemu_log.

as well as a couple of minor rebase tweaks. In addition, the next two
architectures I plan on upstreaming (arm and riscv64) also have their prereqs
satisfied with this request.

v2: Remove accidental module regression in patch 7 and try again.

# gpg: Signature made Mon 18 Oct 2021 12:00:28 PM PDT
# gpg:                using RSA key 2035F894B00AA3CF7CCDE1B76C1CD1287DB01100
# gpg: Good signature from "Warner Losh <wlosh@netflix.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@bsdimp.com>" [unknown]
# gpg:                 aka "Warner Losh <imp@freebsd.org>" [unknown]
# gpg:                 aka "Warner Losh <imp@village.org>" [unknown]
# gpg:                 aka "Warner Losh <wlosh@bsdimp.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 2035 F894 B00A A3CF 7CCD  E1B7 6C1C D128 7DB0 1100

* remotes/bsdimp/tags/pull-bsd-user-20211018-pull-request: (23 commits)
  bsd-user/signal: Create a dummy signal queueing function
  bsd-user: Rename sigqueue to qemu_sigqueue
  bsd-user/sysarch: Move to using do_freebsd_arch_sysarch interface
  bsd-user: Add stop_all_tasks
  bsd-user: Remove used from TaskState
  bsd-user/target_os_elf: If ELF_HWCAP2 is defined, publish it
  bsd-user/target_os_elf.h: Remove fallback ELF_HWCAP and reorder
  bsd-user: move TARGET_MC_GET_CLEAR_RET to target_os_signal.h
  bsd-user/errno_defs.h: Add internal error numbers
  bsd-user: export get_errno and is_error from syscall.c
  bsd-user: TARGET_RESET define is unused, remove it
  bsd-user/strace.list: Remove support for FreeBSD versions older than 12.0
  bsd-user/target_os-user.h: Remove support for FreeBSD older than 12.0
  meson: *-user: only descend into *-user when configured
  bsd-user/mmap.c: assert that target_mprotect cannot fail
  bsd-user/mmap.c: Implement MAP_EXCL, required by jemalloc in head
  bsd-user/mmap.c: Don't mmap fd == -1 independently from MAP_ANON flag
  bsd-user/mmap.c: Convert to qemu_log logging for mmap debugging
  bsd-user/mmap.c: mmap prefer MAP_ANON for BSD
  bsd-user/mmap.c: mmap return ENOMEM on overflow
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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