NetBSD/usr.sbin/mdsetimage/exec_aout.c

100 lines
3.1 KiB
C

/* $NetBSD: exec_aout.c,v 1.8 2016/09/21 16:25:41 christos Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: exec_aout.c,v 1.8 2016/09/21 16:25:41 christos Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "extern.h"
#if defined(NLIST_AOUT)
#include <a.out.h>
#define check(off, size) ((off < 0) || (off + size > mappedsize))
#define BAD do { rv = -1; goto out; } while (0)
int
check_aout(const char *mappedfile, size_t mappedsize)
{
const struct exec *execp;
int rv;
rv = 0;
if (check(0, sizeof *execp))
BAD;
execp = (const struct exec *)&mappedfile[0];
if (N_BADMAG(*execp))
BAD;
out:
return (rv);
}
int
findoff_aout(const char *mappedfile, size_t mappedsize, u_long vmaddr,
size_t *fileoffp, u_long text_start)
{
const struct exec *execp;
int rv;
rv = 0;
execp = (const struct exec *)&mappedfile[0];
if (N_TXTADDR(*execp) + (execp->a_entry & (N_PAGSIZ(*execp)-1)) !=
execp->a_entry)
vmaddr += N_TXTADDR(*execp) +
(execp->a_entry & (N_PAGSIZ(*execp)-1)) - execp->a_entry;
/* apply correction based on the supplied text start address, if any */
if (text_start != (unsigned long)~0)
vmaddr += N_TXTADDR(*execp) - text_start;
if (N_TXTADDR(*execp) <= vmaddr &&
vmaddr < (N_TXTADDR(*execp) + execp->a_text))
*fileoffp = vmaddr - N_TXTADDR(*execp) + N_TXTOFF(*execp);
else if (N_DATADDR(*execp) <= vmaddr &&
vmaddr < (N_DATADDR(*execp) + execp->a_data))
*fileoffp = vmaddr - N_DATADDR(*execp) + N_DATOFF(*execp);
else
BAD;
out:
return (rv);
}
#endif /* NLIST_AOUT */