[PATCH 0/6] y2038: Linux: Provide __clock_* functions supporting 64 bit time

[Lukasz Majewski <lukma at denx dot de>]

This patch set introduces the conversion of __clock_{settime|
gettime|getres|nanosleep} to explicit 64 bit struct __timespec64
arguments. As a result those functions are now Y2038 safe

To achieve the above goal - new, internal to glibc,
struct __timespec64 has been also introduced as well as
helper functions to handle time conversions on 32 bit systems.

The code from this patch set uses new clock_* syscalls (explicit
64 bits) from Linux kernel (5.1+) as well

This work is (loosely) based on a previous development/patches:
https://libc-alpha.sourceware.narkive.com/zniMOWui/rfc-patch-00-52-make-glibc-y2038-proof#post68

Those patches shall be applied on top of:
https://github.com/lmajewski/y2038_glibc/commit/c17d6107d205026f476076948269763f5d177481
https://github.com/lmajewski/y2038_glibc/commit/a9835a888842078ea4d317086375d8f518a490d7

Github branch (including the y2038 conversion example):
https://github.com/lmajewski/y2038_glibc/commits/Y2038-2.29-glibc-__clock-internal-struct-timespec-v1


Shall be used with provided meta-y2038 for development and testing:
https://github.com/lmajewski/meta-y2038

I've used guidelines from:
https://www.gnu.org/software/libc/manual/html_mono/libc.html
"D.2.1 64-bit time symbol handling in the GNU C Library"
to convert *clock_settime*.

and most notably from:
https://sourceware.org/glibc/wiki/Y2038ProofnessDesign#clock_gettime.28.29

Comments are more than welcome.


Lukasz Majewski (6):
  y2038: Introduce internal for glibc struct __timespec64
  y2038: Provide conversion helpers for struct __timespec64
  y2038: linux: Provide __clock_settime64 implementation
  y2038: linux: Provide __clock_getres64 implementation
  y2038: linux: Provide __clock_gettime64 implementation
  y2038: linux: Provide __clock_nanosleep64 implementation

 include/time.h                            | 142 ++++++++++++++++++++++++++++++
 sysdeps/unix/sysv/linux/clock_getres.c    |  33 ++++++-
 sysdeps/unix/sysv/linux/clock_gettime.c   |  33 ++++++-
 sysdeps/unix/sysv/linux/clock_nanosleep.c |  52 ++++++++++-
 sysdeps/unix/sysv/linux/clock_settime.c   |  34 ++++++-
 5 files changed, 285 insertions(+), 9 deletions(-)

-- 
2.11.0