1 /* $NetBSD: exec_aout.c,v 1.3 1997/10/17 10:28:21 lukem 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 #include <sys/cdefs.h> 34 #ifndef lint 35 __RCSID("$NetBSD: exec_aout.c,v 1.3 1997/10/17 10:28:21 lukem Exp $"); 36 #endif /* not lint */ 37 38 #include <sys/types.h> 39 #include <stdio.h> 40 #include <string.h> 41 #include "extern.h" 42 43 #if defined(NLIST_AOUT) 44 #include <a.out.h> 45 46 #define check(off, size) ((off < 0) || (off + size > mappedsize)) 47 #define BAD do { rv = -1; goto out; } while (0) 48 49 extern int T_flag_specified; 50 extern u_long text_start; 51 52 int 53 check_aout(mappedfile, mappedsize) 54 const char *mappedfile; 55 size_t mappedsize; 56 { 57 struct exec *execp; 58 int rv; 59 60 rv = 0; 61 62 if (check(0, sizeof *execp)) 63 BAD; 64 execp = (struct exec *)&mappedfile[0]; 65 66 if (N_BADMAG(*execp)) 67 BAD; 68 69 out: 70 return (rv); 71 } 72 73 int 74 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp) 75 const char *mappedfile; 76 size_t mappedsize, *fileoffp; 77 u_long vmaddr; 78 { 79 struct exec *execp; 80 int rv; 81 82 rv = 0; 83 execp = (struct exec *)&mappedfile[0]; 84 85 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) != 86 execp->a_entry) 87 vmaddr += N_TXTADDR(*execp) + 88 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry; 89 90 /* apply correction based on the supplied text start address, if any */ 91 if (T_flag_specified) 92 vmaddr += N_TXTADDR(*execp) - text_start; 93 94 if (N_TXTADDR(*execp) <= vmaddr && 95 vmaddr < (N_TXTADDR(*execp) + execp->a_text)) 96 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp); 97 else if (N_DATADDR(*execp) <= vmaddr && 98 vmaddr < (N_DATADDR(*execp) + execp->a_data)) 99 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp); 100 else 101 BAD; 102 103 out: 104 return (rv); 105 } 106 107 #endif /* NLIST_AOUT */ 108