1 /* $NetBSD: exec_aout.c,v 1.1 1996/10/04 00:18:55 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 static char *rcsid = "$NetBSD: exec_aout.c,v 1.1 1996/10/04 00:18:55 cgd Exp $"; 35 #endif /* not lint */ 36 37 #include <sys/types.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include "extern.h" 41 42 #if defined(NLIST_AOUT) 43 #include <a.out.h> 44 45 #define check(off, size) ((off < 0) || (off + size > mappedsize)) 46 #define BAD do { rv = -1; goto out; } while (0) 47 48 int 49 check_aout(mappedfile, mappedsize) 50 const char *mappedfile; 51 size_t mappedsize; 52 { 53 struct exec *execp; 54 int rv; 55 56 rv = 0; 57 58 if (check(0, sizeof *execp)) 59 BAD; 60 execp = (struct exec *)&mappedfile[0]; 61 62 if (N_BADMAG(*execp)) 63 BAD; 64 65 out: 66 return (rv); 67 } 68 69 int 70 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp) 71 const char *mappedfile; 72 size_t mappedsize, *fileoffp; 73 u_long vmaddr; 74 { 75 struct exec *execp; 76 int rv; 77 78 rv = 0; 79 execp = (struct exec *)&mappedfile[0]; 80 81 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) != 82 execp->a_entry) 83 vmaddr += N_TXTADDR(*execp) + 84 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry; 85 86 if (N_TXTADDR(*execp) <= vmaddr && 87 vmaddr < (N_TXTADDR(*execp) + execp->a_text)) 88 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp); 89 else if (N_DATADDR(*execp) <= vmaddr && 90 vmaddr < (N_DATADDR(*execp) + execp->a_data)) 91 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp); 92 else 93 BAD; 94 95 out: 96 return (rv); 97 } 98 99 #endif /* NLIST_AOUT */ 100