1  /*
       2   * Check decoding of process_mrelease syscall.
       3   *
       4   * Copyright (c) 2021 Eugene Syromyatnikov <evgsyr@gmail.com>
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: GPL-2.0-or-later
       8   */
       9  
      10  #include "tests.h"
      11  #include "scno.h"
      12  
      13  #include <inttypes.h>
      14  #include <stdio.h>
      15  #include <stdint.h>
      16  #include <unistd.h>
      17  
      18  #ifndef SKIP_IF_PROC_IS_UNAVAILABLE
      19  # define SKIP_IF_PROC_IS_UNAVAILABLE
      20  #endif
      21  
      22  #ifndef FD0_STR
      23  # define FD0_STR ""
      24  #endif
      25  
      26  static const char *errstr;
      27  
      28  static long
      29  sys_process_mrelease(int pidfd, unsigned int flags)
      30  {
      31  	static const kernel_ulong_t fill =
      32  		(kernel_ulong_t) 0xbadc0ded00000000ULL;
      33  	kernel_ulong_t arg1 = fill | (unsigned int) pidfd;
      34  	kernel_ulong_t arg2 = fill | flags;
      35  	kernel_ulong_t arg3 = fill | 0xdeedefed;
      36  	kernel_ulong_t arg4 = fill | 0xdebeefed;
      37  	kernel_ulong_t arg5 = fill | 0xdecaffed;
      38  	kernel_ulong_t arg6 = fill | 0xdeefaced;
      39  
      40  	long rc = syscall(__NR_process_mrelease,
      41  			  arg1, arg2, arg3, arg4, arg5, arg6);
      42  	errstr = sprintrc(rc);
      43  	return rc;
      44  }
      45  
      46  int
      47  main(void)
      48  {
      49  	SKIP_IF_PROC_IS_UNAVAILABLE;
      50  
      51  	sys_process_mrelease(-1, 0);
      52  	printf("process_mrelease(-1, 0) = %s\n", errstr);
      53  
      54  	sys_process_mrelease(0, 0xfacefeed);
      55  	printf("process_mrelease(0" FD0_STR ", 0xfacefeed) = %s\n", errstr);
      56  
      57  	puts("+++ exited with 0 +++");
      58  	return 0;
      59  }