/* $NetBSD: loadfile_aout.c,v 1.15 2014/02/20 00:29:03 joerg Exp $ */

/* $NetBSD: loadfile_aout.c,v 1.15 2014/02/20 00:29:03 joerg Exp $ */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center and by Christos Zoulas.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)boot.c 8.1 (Berkeley) 6/10/93
*/

#ifdef _STANDALONE
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#else
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#endif

#include <sys/param.h>
#include <sys/exec_aout.h>

#include "loadfile.h"

#ifdef BOOT_AOUT

int
loadfile_aout(int fd, struct exec *x, u_long *marks, int flags)
{
u_long entry = x->a_entry;
paddr_t aoutp = 0;
paddr_t minp, maxp;
int cc;
paddr_t offset = marks[MARK_START];
u_long magic = N_GETMAGIC(*x);
int sub;
ssize_t nr;

/* some ports don't use the offset */
(void)offset;

/* In OMAGIC and NMAGIC, exec header isn't part of text segment */
if (magic == OMAGIC || magic == NMAGIC)
sub = 0;
else
sub = sizeof(*x);

minp = maxp = ALIGNENTRY(entry);

if (lseek(fd, sizeof(*x), SEEK_SET) == -1) {
WARN(("lseek text"));
return 1;
}

/*
* Leave a copy of the exec header before the text.
* The kernel may use this to verify that the
* symbols were loaded by this boot program.
*/
if (magic == OMAGIC || magic == NMAGIC) {
if (flags & LOAD_HDR && maxp >= sizeof(*x))
BCOPY(x, maxp - sizeof(*x), sizeof(*x));
}
else {
if (flags & LOAD_HDR)
BCOPY(x, maxp, sizeof(*x));
if (flags & (LOAD_HDR|COUNT_HDR))
maxp += sizeof(*x);
}

/*
* Read in the text segment.
*/
if (flags & LOAD_TEXT) {
PROGRESS(("%ld", x->a_text));

nr = READ(fd, maxp, x->a_text - sub);
if (nr == -1) {
WARN(("read text"));
return 1;
}
if (nr != (ssize_t)(x->a_text - sub)) {
errno = EIO;
WARN(("read text"));
return 1;
}
} else {
if (lseek(fd, x->a_text - sub, SEEK_CUR) == -1) {
WARN(("seek text"));
return 1;
}
}
if (flags & (LOAD_TEXT|COUNT_TEXT))
maxp += x->a_text - sub;

/*
* Provide alignment if required
*/
if (magic == ZMAGIC || magic == NMAGIC) {
int size = -(unsigned int)maxp & (AOUT_LDPGSZ - 1);

if (flags & LOAD_TEXTA) {
PROGRESS(("/%d", size));
BZERO(maxp, size);
}

if (flags & (LOAD_TEXTA|COUNT_TEXTA))
maxp += size;
}

/*
* Read in the data segment.
*/
if (flags & LOAD_DATA) {
PROGRESS(("+%ld", x->a_data));

marks[MARK_DATA] = LOADADDR(maxp);
nr = READ(fd, maxp, x->a_data);
if (nr == -1) {
WARN(("read data"));
return 1;
}
if (nr != (ssize_t)x->a_data) {
errno = EIO;
WARN(("read data"));
return 1;
}
}
else {
if (lseek(fd, x->a_data, SEEK_CUR) == -1) {
WARN(("seek data"));
return 1;
}
}
if (flags & (LOAD_DATA|COUNT_DATA))
maxp += x->a_data;

/*
* Zero out the BSS section.
* (Kernel doesn't care, but do it anyway.)
*/
if (flags & LOAD_BSS) {
PROGRESS(("+%ld", x->a_bss));

BZERO(maxp, x->a_bss);
}

if (flags & (LOAD_BSS|COUNT_BSS))
maxp += x->a_bss;

/*
* Read in the symbol table and strings.
* (Always set the symtab size word.)
*/
if (flags & LOAD_SYM)
BCOPY(&x->a_syms, maxp, sizeof(x->a_syms));

if (flags & (LOAD_SYM|COUNT_SYM)) {
maxp += sizeof(x->a_syms);
aoutp = maxp;
}

if (x->a_syms > 0) {
/* Symbol table and string table length word. */

if (flags & LOAD_SYM) {
PROGRESS(("+[%ld", x->a_syms));

nr = READ(fd, maxp, x->a_syms);
if (nr == -1) {
WARN(("read symbols"));
return 1;
}
if (nr != (ssize_t)x->a_syms) {
errno = EIO;
WARN(("read symbols"));
return 1;
}
} else {
if (lseek(fd, x->a_syms, SEEK_CUR) == -1) {
WARN(("seek symbols"));
return 1;
}
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += x->a_syms;

nr = read(fd, &cc, sizeof(cc));
if (nr == -1) {
WARN(("read string table"));
return 1;
}
if (nr != sizeof(cc)) {
errno = EIO;
WARN(("read string table"));
return 1;
}

if (flags & LOAD_SYM) {
BCOPY(&cc, maxp, sizeof(cc));

/* String table. Length word includes itself. */

PROGRESS(("+%d]", cc));
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += sizeof(cc);

cc -= sizeof(int);
if (cc <= 0) {
WARN(("symbol table too short"));
return 1;
}

if (flags & LOAD_SYM) {
nr = READ(fd, maxp, cc);
if (nr == -1) {
WARN(("read strings"));
return 1;
}
if (nr != cc) {
errno = EIO;
WARN(("read strings"));
return 1;
}
} else {
if (lseek(fd, cc, SEEK_CUR) == -1) {
WARN(("seek strings"));
return 1;
}
}
if (flags & (LOAD_SYM|COUNT_SYM))
maxp += cc;
}

marks[MARK_START] = LOADADDR(minp);
marks[MARK_ENTRY] = LOADADDR(entry);
marks[MARK_NSYM] = x->a_syms;
marks[MARK_SYM] = LOADADDR(aoutp);
marks[MARK_END] = LOADADDR(maxp);
return 0;
}

#endif /* BOOT_AOUT */