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exec_prot.h revision 1.1 
      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
     62