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      1  1.2  skrll /* $NetBSD: exec_prot.h,v 1.2 2022/05/31 07:12:15 skrll Exp $ */
      2  1.1    jym 
      3  1.1    jym /*-
      4  1.1    jym  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  1.1    jym  * All rights reserved.
      6  1.1    jym  *
      7  1.1    jym  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1    jym  * by Jean-Yves Migeon.
      9  1.1    jym  *
     10  1.1    jym  * Redistribution and use in source and binary forms, with or without
     11  1.1    jym  * modification, are permitted provided that the following conditions
     12  1.1    jym  * are met:
     13  1.1    jym  * 1. Redistributions of source code must retain the above copyright
     14  1.1    jym  *    notice, this list of conditions and the following disclaimer.
     15  1.1    jym  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1    jym  *    notice, this list of conditions and the following disclaimer in the
     17  1.1    jym  *    documentation and/or other materials provided with the distribution.
     18  1.1    jym  *
     19  1.1    jym  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.1    jym  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.1    jym  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.1    jym  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.1    jym  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.1    jym  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.1    jym  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.1    jym  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.1    jym  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.1    jym  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.1    jym  * POSSIBILITY OF SUCH DAMAGE.
     30  1.1    jym  */
     31  1.1    jym 
     32  1.1    jym #ifndef _TESTS_EXEC_PROT_H_
     33  1.1    jym #define _TESTS_EXEC_PROT_H_
     34  1.1    jym 
     35  1.1    jym /*
     36  1.1    jym  * Prototype definitions of external helper functions for executable
     37  1.1    jym  * mapping tests.
     38  1.1    jym  */
     39  1.1    jym 
     40  1.1    jym /*
     41  1.1    jym  * Trivial MD shellcode that justs returns 1.
     42  1.1    jym  */
     43  1.2  skrll #ifdef __hppa__
     44  1.2  skrll extern char return_one[];
     45  1.2  skrll extern char return_one_end[];
     46  1.2  skrll #else
     47  1.1    jym int return_one(void);     /* begin marker -- shellcode entry */
     48  1.1    jym int return_one_end(void); /* end marker */
     49  1.2  skrll #endif
     50  1.1    jym 
     51  1.1    jym /*
     52  1.1    jym  * MD callback to verify whether host offers executable space protection.
     53  1.1    jym  * Returns execute protection level.
     54  1.1    jym  */
     55  1.1    jym int exec_prot_support(void);
     56  1.1    jym 
     57  1.1    jym /* execute protection level */
     58  1.1    jym enum {
     59  1.1    jym 	NOTIMPL = -1, /* callback not implemented */
     60  1.1    jym 	NO_XP,        /* no execute protection */
     61  1.1    jym 	PERPAGE_XP,   /* per-page execute protection */
     62  1.1    jym 	PARTIAL_XP    /* partial execute protection. Depending on where the
     63  1.1    jym 			 page is located in virtual memory, executable space
     64  1.1    jym 			 protection may be enforced or not. */
     65  1.1    jym };
     66  1.1    jym #endif
     67