[00/10] y2038: Convert clock_adjtime related syscalls to support 64 bit time

Message ID 20200426133110.5312-1-lukma@denx.de
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  • y2038: Convert clock_adjtime related syscalls to support 64 bit time
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Lukasz Majewski April 26, 2020, 1:31 p.m.
This patch series converts clock_adjtime to support 64 bit time (by using
clock_adjtime64) when __ASSUME_TIME64_SYSCALLS is defined.

This change required introduction of two new internal types - struct
__ntptimeval64 and struct __timex64 to accomodate 64 bit time on architectures
with __TIMESIZE != 64 and __WORDSIZE == 32.
In several places in the glibc the struct timeval has been replaced with struct
__timeval64.

As a result new, 64 bit supporting functions:
__adjtime64
__adjtimex64
__ntp_gettime64
__ntp_gettimex64

were introduced.

The introduced struct __timex64 is a copy of Linux kernel's struct 
__kernel_timex (v5.6) introduced for properly handling data for clock_adjtime64
syscall.
As the struct's __kernel_timex size is the same as for archs with 
__WORDSIZE == 64, proper padding and data types conversion (i.e. long to long
long) had to be added for architectures with __WORDSIZE == 32 && 
__TIMESIZE != 64.

Moreover, the clock_adjtime64 syscall handling in Linux kernel has been broken
up till v5.4.

Lukasz Majewski (10):
  y2038: include: Move struct __timeval64 definition to a separate file
  y2038: Introduce struct __timex64 - new internal glibc type
  y2038: Provide conversion helpers for struct __timex64
  y2038: linux: Provide __clock_adjtime64 implementation
  y2038: linux: Provide ___adjtimex64 implementation
  y2038: linux: Provide __adjtime64 implementation
  y2038: Introduce struct __ntptimeval64 - new internal glibc type
  y2038: Provide conversion helpers for struct __ntptimeval64
  y2038: linux: Provide __ntp_gettime64 implementation
  y2038: linux: Provide __ntp_gettimex64 implementation

 include/struct___timeval64.h                |  17 ++
 include/sys/time.h                          |   9 ++
 include/time.h                              |  15 +-
 sysdeps/unix/sysv/linux/Makefile            |   2 +-
 sysdeps/unix/sysv/linux/adjtime.c           |  26 +++-
 sysdeps/unix/sysv/linux/adjtimex.c          |  21 ++-
 sysdeps/unix/sysv/linux/clock_adjtime.c     |  64 ++++++++
 sysdeps/unix/sysv/linux/include/sys/timex.h | 162 ++++++++++++++++++++
 sysdeps/unix/sysv/linux/ntp_gettime.c       |  24 ++-
 sysdeps/unix/sysv/linux/ntp_gettimex.c      |  24 ++-
 sysdeps/unix/sysv/linux/syscalls.list       |   1 -
 11 files changed, 337 insertions(+), 28 deletions(-)
 create mode 100644 include/struct___timeval64.h
 create mode 100644 sysdeps/unix/sysv/linux/clock_adjtime.c

-- 
2.20.1