1  /*
       2   * This file is part of time strace test.
       3   *
       4   * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@strace.io>
       5   * Copyright (c) 2015-2023 The strace developers.
       6   * All rights reserved.
       7   *
       8   * SPDX-License-Identifier: GPL-2.0-or-later
       9   */
      10  
      11  #include "tests.h"
      12  #include "scno.h"
      13  
      14  #ifdef __NR_time
      15  
      16  # include <errno.h>
      17  # include <stdio.h>
      18  # include <stdint.h>
      19  # include <unistd.h>
      20  
      21  typedef kernel_ulong_t kernel_time_t;
      22  
      23  static kernel_long_t
      24  k_time(void *p)
      25  {
      26  # if defined __x86_64__ && defined __ILP32__
      27  	register long arg asm("rdi") = (uintptr_t) p;
      28  	kernel_long_t rc;
      29  	asm volatile("syscall\n\t"
      30  		     : "=a"(rc)
      31  		     : "0"(__NR_time), "r"(arg)
      32  		     : "memory", "cc", "r11", "cx");
      33  	if (rc < 0 && rc >= -4095) {
      34  		errno = -rc;
      35  		rc = (kernel_long_t) -1LL;
      36  	}
      37  	return rc;
      38  # else
      39  	const kernel_ulong_t arg = (uintptr_t) p;
      40  	const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
      41  	return syscall(__NR_time, arg, bad, bad, bad, bad, bad);
      42  # endif
      43  }
      44  
      45  int
      46  main(void)
      47  {
      48  	TAIL_ALLOC_OBJECT_CONST_PTR(kernel_time_t, p);
      49  
      50  	kernel_ulong_t t = k_time(NULL);
      51  	if (t == (kernel_ulong_t) -1ULL)
      52  		perror_msg_and_skip("time");
      53  	printf("time(NULL) = %llu (", (unsigned long long) t);
      54  	print_time_t_nsec(t, 0, 0);
      55  	puts(")");
      56  
      57  	t = k_time(p + 1);
      58  	printf("time(%p) = %s\n", p + 1, sprintrc(t));
      59  
      60  	t = k_time(p);
      61  	printf("time([%lld", (long long) *p);
      62  	print_time_t_nsec(*p, 0, 1),
      63  	printf("]) = %llu (", (unsigned long long) t);
      64  	print_time_t_nsec(t, 0, 0);
      65  	puts(")");
      66  
      67  	puts("+++ exited with 0 +++");
      68  	return 0;
      69  }
      70  
      71  #else
      72  
      73  SKIP_MAIN_UNDEFINED("__NR_time")
      74  
      75  #endif