1  /*
       2   * Check decoding of prctl PR_SVE_SET_VL/PR_SVE_GET_VL operations.
       3   *
       4   * Copyright (c) 2021-2023 The strace developers.
       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  #include <stdio.h>
      13  #include <unistd.h>
      14  #include <linux/prctl.h>
      15  
      16  int
      17  main(void)
      18  {
      19  	long rc;
      20  
      21  	prctl_marker();
      22  
      23  	rc = syscall(__NR_prctl, PR_SVE_SET_VL, 0xf);
      24  	printf("prctl(PR_SVE_SET_VL, %#lx) = %s\n", (unsigned long) 0xf,
      25  		   sprintrc(rc));
      26  
      27  	rc = syscall(__NR_prctl, PR_SVE_SET_VL, 0xff);
      28  	printf("prctl(PR_SVE_SET_VL, %#lx) = %s\n", (unsigned long) 0xff,
      29  		   sprintrc(rc));
      30  
      31  	rc = syscall(__NR_prctl, PR_SVE_SET_VL, PR_SVE_SET_VL_ONEXEC | 0xff);
      32  	printf("prctl(PR_SVE_SET_VL, PR_SVE_SET_VL_ONEXEC|%#lx) = %s\n",
      33  		   (unsigned long) 0xff, sprintrc(rc));
      34  
      35  	rc = syscall(__NR_prctl, PR_SVE_SET_VL, PR_SVE_VL_INHERIT | 0xff);
      36  	printf("prctl(PR_SVE_SET_VL, PR_SVE_VL_INHERIT|%#lx) = %s\n",
      37  		   (unsigned long) 0xff, sprintrc(rc));
      38  
      39  	rc = syscall(__NR_prctl, PR_SVE_SET_VL,
      40  				 PR_SVE_SET_VL_ONEXEC | PR_SVE_VL_INHERIT | 0xff);
      41  	printf("prctl(PR_SVE_SET_VL, "
      42  		   "PR_SVE_SET_VL_ONEXEC|PR_SVE_VL_INHERIT|%#lx) = %s\n",
      43  		   (unsigned long) 0xff, sprintrc(rc));
      44  
      45  	rc = syscall(__NR_prctl, PR_SVE_GET_VL);
      46  	printf("prctl(PR_SVE_GET_VL) = ");
      47  	if (rc >= 0) {
      48  		printf("%#lx", rc);
      49  		if (rc > 0xffff) {
      50  			printf(" (");
      51  			if (rc & PR_SVE_SET_VL_ONEXEC)
      52  				printf("PR_SVE_SET_VL_ONEXEC");
      53  			if (rc & PR_SVE_VL_INHERIT) {
      54  				printf("%sPR_SVE_VL_INHERIT",
      55  				       rc & PR_SVE_SET_VL_ONEXEC ? "|" : "");
      56  			}
      57  			if (rc & ~0x6ffffU) {
      58  				printf("%s%#lx",
      59  				       rc & 0x60000 ? "|" : "", rc & ~0x6ffffU);
      60  			}
      61  			printf("|%#lx)\n", rc & 0xffffU);
      62  		} else {
      63  			puts("");
      64  		}
      65  	} else {
      66  		puts(sprintrc(rc));
      67  	}
      68  
      69  	puts("+++ exited with 0 +++");
      70  	return 0;
      71  }