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/* $NetBSD: loadfile.c,v 1.30 2008/05/20 16:04:08 ad Exp $ */
/*-
* Copyright (c) 1997, 2008 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.h>
#include "loadfile.h"
uint32_t netbsd_version;
u_int netbsd_elf_class;
/*
* Open 'filename', read in program and return the opened file
* descriptor if ok, or -1 on error.
* Fill in marks
*/
int
loadfile(const char *fname, u_long *marks, int flags)
{
int fd, error;
/* Open the file. */
if ((fd = open(fname, 0)) < 0) {
WARN(("open %s", fname ? fname : "<default>"));
return -1;
}
/* Load it; save the value of errno across the close() call */
if ((error = fdloadfile(fd, marks, flags)) != 0) {
(void)close(fd);
errno = error;
return -1;
}
return fd;
}
/*
* Read in program from the given file descriptor.
* Return error code (0 on success).
* Fill in marks.
*/
int
fdloadfile(int fd, u_long *marks, int flags)
{
union {
#ifdef BOOT_ECOFF
struct ecoff_exechdr coff;
#endif
#ifdef BOOT_ELF32
Elf32_Ehdr elf32;
#endif
#ifdef BOOT_ELF64
Elf64_Ehdr elf64;
#endif
#ifdef BOOT_AOUT
struct exec aout;
#endif
} hdr;
ssize_t nr;
int rval;
/* Read the exec header. */
if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
goto err;
nr = read(fd, &hdr, sizeof(hdr));
if (nr == -1) {
WARN(("read header failed"));
goto err;
}
if (nr != sizeof(hdr)) {
WARN(("read header short"));
errno = EFTYPE;
goto err;
}
#ifdef BOOT_ECOFF
if (!ECOFF_BADMAG(&hdr.coff)) {
rval = loadfile_coff(fd, &hdr.coff, marks, flags);
} else
#endif
#ifdef BOOT_ELF32
if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) {
netbsd_elf_class = ELFCLASS32;
rval = loadfile_elf32(fd, &hdr.elf32, marks, flags);
} else
#endif
#ifdef BOOT_ELF64
if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 &&
hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) {
netbsd_elf_class = ELFCLASS64;
rval = loadfile_elf64(fd, &hdr.elf64, marks, flags);
} else
#endif
#ifdef BOOT_AOUT
if (OKMAGIC(N_GETMAGIC(hdr.aout))
#ifndef NO_MID_CHECK
&& N_GETMID(hdr.aout) == MID_MACHINE
#endif
) {
rval = loadfile_aout(fd, &hdr.aout, marks, flags);
} else
#endif
{
rval = 1;
errno = EFTYPE;
}
if (rval == 0) {
if ((flags & LOAD_ALL) != 0)
PROGRESS(("=0x%lx\n",
marks[MARK_END] - marks[MARK_START]));
return 0;
}
err:
return errno;
}
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