195 lines
5.7 KiB
C
195 lines
5.7 KiB
C
/* $NetBSD: loadfile.c,v 1.30 2008/05/20 16:04:08 ad Exp $ */
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/*-
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* Copyright (c) 1997, 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center and by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)boot.c 8.1 (Berkeley) 6/10/93
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*/
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#ifdef _STANDALONE
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#include <lib/libsa/stand.h>
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#include <lib/libkern/libkern.h>
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#else
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <err.h>
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#endif
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#include <sys/param.h>
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#include <sys/exec.h>
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#include "loadfile.h"
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uint32_t netbsd_version;
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u_int netbsd_elf_class;
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/*
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* Open 'filename', read in program and return the opened file
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* descriptor if ok, or -1 on error.
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* Fill in marks
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*/
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int
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loadfile(const char *fname, u_long *marks, int flags)
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{
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int fd, error;
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/* Open the file. */
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if ((fd = open(fname, 0)) < 0) {
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WARN(("open %s", fname ? fname : "<default>"));
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return -1;
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}
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/* Load it; save the value of errno across the close() call */
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if ((error = fdloadfile(fd, marks, flags)) != 0) {
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(void)close(fd);
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errno = error;
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return -1;
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}
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return fd;
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}
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/*
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* Read in program from the given file descriptor.
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* Return error code (0 on success).
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* Fill in marks.
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*/
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int
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fdloadfile(int fd, u_long *marks, int flags)
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{
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union {
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#ifdef BOOT_ECOFF
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struct ecoff_exechdr coff;
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#endif
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#ifdef BOOT_ELF32
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Elf32_Ehdr elf32;
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#endif
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#ifdef BOOT_ELF64
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Elf64_Ehdr elf64;
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#endif
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#ifdef BOOT_AOUT
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struct exec aout;
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#endif
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} hdr;
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ssize_t nr;
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int rval;
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/* Read the exec header. */
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if (lseek(fd, 0, SEEK_SET) == (off_t)-1)
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goto err;
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nr = read(fd, &hdr, sizeof(hdr));
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if (nr == -1) {
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WARN(("read header failed"));
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goto err;
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}
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if (nr != sizeof(hdr)) {
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WARN(("read header short"));
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errno = EFTYPE;
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goto err;
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}
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#ifdef BOOT_ECOFF
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if (!ECOFF_BADMAG(&hdr.coff)) {
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rval = loadfile_coff(fd, &hdr.coff, marks, flags);
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} else
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#endif
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#ifdef BOOT_ELF32
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if (memcmp(hdr.elf32.e_ident, ELFMAG, SELFMAG) == 0 &&
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hdr.elf32.e_ident[EI_CLASS] == ELFCLASS32) {
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netbsd_elf_class = ELFCLASS32;
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rval = loadfile_elf32(fd, &hdr.elf32, marks, flags);
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} else
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#endif
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#ifdef BOOT_ELF64
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if (memcmp(hdr.elf64.e_ident, ELFMAG, SELFMAG) == 0 &&
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hdr.elf64.e_ident[EI_CLASS] == ELFCLASS64) {
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netbsd_elf_class = ELFCLASS64;
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rval = loadfile_elf64(fd, &hdr.elf64, marks, flags);
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} else
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#endif
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#ifdef BOOT_AOUT
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if (OKMAGIC(N_GETMAGIC(hdr.aout))
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#ifndef NO_MID_CHECK
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&& N_GETMID(hdr.aout) == MID_MACHINE
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#endif
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) {
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rval = loadfile_aout(fd, &hdr.aout, marks, flags);
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} else
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#endif
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{
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rval = 1;
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errno = EFTYPE;
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}
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if (rval == 0) {
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if ((flags & LOAD_ALL) != 0)
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PROGRESS(("=0x%lx\n",
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marks[MARK_END] - marks[MARK_START]));
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return 0;
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}
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err:
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return errno;
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}
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