seccomp: Fix build and operation on 32-bit musl targets

On 32-bit musl targets (for example, Alpine i386 / i586), we need to:

- use the set of system calls already defined for i686. While Alpine's
  kernel supports i586 as well (Debian for example doesn't), it's the
  same architecture, so change i386/i486/i586 machine strings to i686
  in seccomp.sh

- allow clock_gettime64() as an alternative to clock_gettime() (not
  just added on top, rather replacing it), because clock_gettime()
  isn't available as a system call name at all in musl headers (while
  glibc aliases it to the kernel's clock_gettime64())

- similarly, allow timerfd_gettime64() as a name for timerfd_gettime()

- allow timerfd_settime32() as a name for timerfd_settime(), even
  though there's no such system call declared in Linux kernel headers,
  as musl uses that name to distinguish it from timerfd_settime64()

- unconditionally allow timerfd_settime64(), because musl uses it
  whenever the 'old' argument is non-NULL and sizeof(time_t) > 4,
  which happens to be the case in tcp_timer_handler()

Reported-by: John D. Rowell <me@jdrowell.com>
Link: https://bugs.passt.top/show_bug.cgi?id=177
Link: https://gitlab.alpinelinux.org/alpine/aports/-/issues/17686
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions