1 /* $NetBSD: exec_aout.c,v 1.5 2000/06/14 17:26:13 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.netbsd.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>> 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: exec_aout.c,v 1.5 2000/06/14 17:26:13 cgd Exp $"); 40 #endif /* not lint */ 41 42 #include <sys/types.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include "extern.h" 46 47 #if defined(NLIST_AOUT) 48 #include <a.out.h> 49 50 #define check(off, size) ((off < 0) || (off + size > mappedsize)) 51 #define BAD do { rv = -1; goto out; } while (0) 52 53 extern int T_flag_specified; 54 extern u_long text_start; 55 56 int 57 check_aout(mappedfile, mappedsize) 58 const char *mappedfile; 59 size_t mappedsize; 60 { 61 struct exec *execp; 62 int rv; 63 64 rv = 0; 65 66 if (check(0, sizeof *execp)) 67 BAD; 68 execp = (struct exec *)&mappedfile[0]; 69 70 if (N_BADMAG(*execp)) 71 BAD; 72 73 out: 74 return (rv); 75 } 76 77 int 78 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp) 79 const char *mappedfile; 80 size_t mappedsize, *fileoffp; 81 u_long vmaddr; 82 { 83 struct exec *execp; 84 int rv; 85 86 rv = 0; 87 execp = (struct exec *)&mappedfile[0]; 88 89 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) != 90 execp->a_entry) 91 vmaddr += N_TXTADDR(*execp) + 92 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry; 93 94 /* apply correction based on the supplied text start address, if any */ 95 if (T_flag_specified) 96 vmaddr += N_TXTADDR(*execp) - text_start; 97 98 if (N_TXTADDR(*execp) <= vmaddr && 99 vmaddr < (N_TXTADDR(*execp) + execp->a_text)) 100 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp); 101 else if (N_DATADDR(*execp) <= vmaddr && 102 vmaddr < (N_DATADDR(*execp) + execp->a_data)) 103 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp); 104 else 105 BAD; 106 107 out: 108 return (rv); 109 } 110 111 #endif /* NLIST_AOUT */ 112