text: #define _GNU_SOURCE
  #include <poll.h>
  #include <signal.h>
  #include <errno.h>
  #include "syscall.h"
  #include <unsupported_api.h>
  
  #define IS32BIT(x) !((x)+0x80000000ULL>>32)
  #define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
  
  int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask)
  {
  	time_t s = to ? to->tv_sec : 0;
  	long ns = to ? to->tv_nsec : 0;
  	unsupported_api(__FUNCTION__);
  #ifdef SYS_ppoll_time64
  	int r = -ENOSYS;
  	if (SYS_ppoll == SYS_ppoll_time64 || !IS32BIT(s))
  		r = __syscall_cp(SYS_ppoll_time64, fds, n,
  			to ? ((long long[]){s, ns}) : 0,
  			mask, _NSIG/8);
  	if (SYS_ppoll == SYS_ppoll_time64 || r != -ENOSYS)
  		return __syscall_ret(r);
  	s = CLAMP(s);
  #endif
  	return syscall_cp(SYS_ppoll, fds, n,
  		to ? ((long[]){s, ns}) : 0, mask, _NSIG/8);
  }
  