strace 5.13 released

[Dmitry V. Levin]

Starting with version 4.13, strace follows the schedule of linux kernel
and new versions of strace are released along with new versions of linux
kernel, so strace 5.13 is tagged and uploaded.

$ git tag -v v5.13 2> /dev/null | sed -n '/^$/,$p'

Noteworthy changes in strace 5.13 (2021-07-18)
==============================================

* Improvements
  * Print netlink data in a more structured way.
  * Implemented decoding of NT_PRSTATUS and NT_FPREGSET regsets
    of PTRACE_GETREGSET and PTRACE_SETREGSET requests.
  * Implemented decoding of regs argument of PTRACE_GETREGS, PTRACE_GETREGS64,
    PTRACE_SETREGS, PTRACE_SETREGS64, PTRACE_GETFPREGS, and PTRACE_SETFPREGS
    requests.
  * Implemented powerpc System Call Vectored ABI support.
  * Implemented decoding of landlock_add_rule, landlock_create_ruleset,
    and landlock_restrict_self syscalls introduced in Linux 5.13.
  * Enhanced decoding of perf_event_open syscall.
  * Updated lists of BPF_*, IORING_*, KEXEC_*, KEY_*, KVM_*, NT_*, PR_*,
    PTRACE_*, RTM_*, RTPROT_*, TRAP_*, UFFD_*, UFFDIO_*, and V4L2_* constants.
  * Updated lists of ioctl commands from Linux 5.13.

* Portability
  * On powerpc and powerpc64, linux kernel >= 2.6.23 is required.
    Older versions without a decent PTRACE_GETREGS support will not work.

Contributors
============

This release was made possible by the contributions of many people.
The maintainers are grateful to everyone who has contributed
changes or bug reports.  These include:

* Alyssa Ross
* Deborah Brouwer
* Dmitry V. Levin
* Eugene Syromyatnikov
* Gleb Fotengauer-Malinovskiy
* Srikavin Ramkumar

Please refer to the CREDITS file for the full list of strace contributors.


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