d71686ab26
implement loadfile() in terms of it. This allows clients to open a file once and "load" it multiple times (e.g. first with COUNT_KERNEL, then with LOAD_KERNEL) without the side-effects of multiple open calls.
201 lines
6.2 KiB
C
201 lines
6.2 KiB
C
/* $NetBSD: loadfile.c,v 1.22 2003/02/24 10:51:05 pk 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation 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 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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"
|
|
|
|
/*
|
|
* Open 'filename', read in program and return the opened file
|
|
* descriptor if ok, or -1 on error.
|
|
* Fill in marks
|
|
*/
|
|
int
|
|
loadfile(fname, marks, flags)
|
|
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(fd, marks, flags)
|
|
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;
|
|
if ((nr = read(fd, &hdr, sizeof(hdr))) != sizeof(hdr)) {
|
|
WARN(("read header"));
|
|
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) {
|
|
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) {
|
|
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);
|
|
}
|