1 /* $NetBSD: exec_aout.c,v 1.6 2001/10/01 23:32:34 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. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>> 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __RCSID("$NetBSD: exec_aout.c,v 1.6 2001/10/01 23:32:34 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 extern int T_flag_specified; 49 extern u_long text_start; 50 51 int 52 check_aout(mappedfile, mappedsize) 53 const char *mappedfile; 54 size_t mappedsize; 55 { 56 struct exec *execp; 57 int rv; 58 59 rv = 0; 60 61 if (check(0, sizeof *execp)) 62 BAD; 63 execp = (struct exec *)&mappedfile[0]; 64 65 if (N_BADMAG(*execp)) 66 BAD; 67 68 out: 69 return (rv); 70 } 71 72 int 73 findoff_aout(mappedfile, mappedsize, vmaddr, fileoffp) 74 const char *mappedfile; 75 size_t mappedsize, *fileoffp; 76 u_long vmaddr; 77 { 78 struct exec *execp; 79 int rv; 80 81 rv = 0; 82 execp = (struct exec *)&mappedfile[0]; 83 84 if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) != 85 execp->a_entry) 86 vmaddr += N_TXTADDR(*execp) + 87 (execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry; 88 89 /* apply correction based on the supplied text start address, if any */ 90 if (T_flag_specified) 91 vmaddr += N_TXTADDR(*execp) - text_start; 92 93 if (N_TXTADDR(*execp) <= vmaddr && 94 vmaddr < (N_TXTADDR(*execp) + execp->a_text)) 95 *fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp); 96 else if (N_DATADDR(*execp) <= vmaddr && 97 vmaddr < (N_DATADDR(*execp) + execp->a_data)) 98 *fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp); 99 else 100 BAD; 101 102 out: 103 return (rv); 104 } 105 106 #endif /* NLIST_AOUT */ 107