tests/lib/libc/common/exec_prot.h

   1 /* $NetBSD: exec_prot.h,v 1.1 2011/07/18 23:16:11 jym Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jean-Yves Migeon.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef _TESTS_EXEC_PROT_H_
  33 #define _TESTS_EXEC_PROT_H_
  34
  35 /*
  36  * Prototype definitions of external helper functions for executable
  37  * mapping tests.
  38  */
  39
  40 /*
  41  * Trivial MD shellcode that justs returns 1.
  42  */
  43 int return_one(void);     /* begin marker -- shellcode entry */
  44 int return_one_end(void); /* end marker */
  45
  46 /*
  47  * MD callback to verify whether host offers executable space protection.
  48  * Returns execute protection level.
  49  */
  50 int exec_prot_support(void);
  51
  52 /* execute protection level */
  53 enum {
  54         NOTIMPL = -1, /* callback not implemented */
  55         NO_XP,        /* no execute protection */
  56         PERPAGE_XP,   /* per-page execute protection */
  57         PARTIAL_XP    /* partial execute protection. Depending on where the
  58                          page is located in virtual memory, executable space
  59                          protection may be enforced or not. */
  60 };
  61 #endif