1/* $NetBSD: exec_coff.c,v 1.7 2016/09/21 16:27:55 christos 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_coff.c,v 1.7 2016/09/21 16:27:55 christos Exp $"); 35#endif /* not lint */ 36 37#include <sys/param.h> 38#include <sys/time.h> 39#include <sys/proc.h> 40#include <sys/types.h> 41#include <stdio.h> 42#include <string.h> 43#include "extern.h" 44 45#if defined(NLIST_COFF) 46#include <sys/exec_coff.h> 47 48#define check(off, size) ((off < 0) || (off + size > mappedsize)) 49#define BAD do { rv = -1; goto out; } while (0) 50 51int 52check_coff(const char *mappedfile, size_t mappedsize) 53{ 54 const struct coff_exechdr *exechdrp; 55 int rv; 56 57 rv = 0; 58 59 if (check(0, sizeof *exechdrp)) 60 BAD; 61 exechdrp = (const struct coff_exechdr *)&mappedfile[0]; 62 63 if (COFF_BADMAG(&(exechdrp->f))) 64 BAD; 65 66out: 67 return (rv); 68} 69 70int 71findoff_coff(const char *mappedfile, size_t mappedsize, u_long vmaddr, 72 size_t *fileoffp, u_long text_addr) 73{ 74 const struct coff_exechdr *exechdrp; 75 int rv; 76 77 rv = 0; 78 exechdrp = (const struct coff_exechdr *)&mappedfile[0]; 79 80#define COFF_TXTOFF_XXX(fp, ap) \ 81 (COFF_ROUND(COFF_HDR_SIZE + (fp)->f_nscns * \ 82 sizeof(struct coff_scnhdr), \ 83 COFF_SEGMENT_ALIGNMENT(fp, ap))) 84 85#define COFF_DATOFF_XXX(fp, ap) \ 86 (COFF_TXTOFF_XXX(fp, ap) + (ap)->a_tsize) 87 88 if ((u_long)exechdrp->a.a_tstart <= vmaddr && 89 vmaddr < (u_long)(exechdrp->a.a_tstart + exechdrp->a.a_tsize)) 90 *fileoffp = vmaddr - exechdrp->a.a_tstart + 91 COFF_TXTOFF(&exechdrp->f, &(exechdrp->a)); 92 else if ((u_long)exechdrp->a.a_dstart <= vmaddr && 93 vmaddr < (u_long)(exechdrp->a.a_dstart + exechdrp->a.a_dsize)) 94 *fileoffp = vmaddr - exechdrp->a.a_dstart + 95 COFF_DATOFF_XXX(&exechdrp->f, &(exechdrp->a)); 96 else 97 BAD; 98 99out: 100 return (rv); 101} 102 103#endif /* NLIST_COFF */ 104