257 lines
6.7 KiB
C
257 lines
6.7 KiB
C
/* $NetBSD: mdsetimage.c,v 1.25 2020/06/14 18:24:21 tsutsui Exp $ */
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/*
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* Copyright (c) 1996, 2002 Christopher G. Demetriou
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#if !defined(lint)
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__COPYRIGHT("@(#) Copyright (c) 1996\
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Christopher G. Demetriou. All rights reserved.");
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__RCSID("$NetBSD: mdsetimage.c,v 1.25 2020/06/14 18:24:21 tsutsui Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "bin.h"
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#define CHUNKSIZE (64 * 1024)
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static void usage(void) __attribute__((noreturn));
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int verbose;
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int extract;
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int setsize;
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static const char *progname;
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#undef setprogname
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#define setprogname(x) (void)(progname = (x))
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#undef getprogname
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#define getprogname() (progname)
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int
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main(int argc, char *argv[])
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{
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int ch, kfd, fsfd, rv;
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struct stat ksb, fssb;
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size_t md_root_image_offset, md_root_size_offset;
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u_int32_t md_root_size_value;
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const char *kfile, *fsfile;
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char *mappedkfile;
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char *bfdname = NULL;
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void *bin;
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ssize_t left_to_copy;
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const char *md_root_image = "_md_root_image";
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const char *md_root_size = "_md_root_size";
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unsigned long text_start = ~0;
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setprogname(argv[0]);
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while ((ch = getopt(argc, argv, "I:S:b:svx")) != -1)
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switch (ch) {
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case 'I':
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md_root_image = optarg;
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break;
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case 'S':
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md_root_size = optarg;
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break;
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case 'T':
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text_start = strtoul(optarg, NULL, 0);
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break;
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case 'b':
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bfdname = optarg;
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break;
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case 's':
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setsize = 1;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'x':
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extract = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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kfile = argv[0];
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fsfile = argv[1];
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if (extract) {
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if ((kfd = open(kfile, O_RDONLY, 0)) == -1)
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err(1, "open %s", kfile);
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} else {
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if ((kfd = open(kfile, O_RDWR, 0)) == -1)
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err(1, "open %s", kfile);
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}
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if (fstat(kfd, &ksb) == -1)
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err(1, "fstat %s", kfile);
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if ((uintmax_t)ksb.st_size != (size_t)ksb.st_size)
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errx(1, "%s too big to map", kfile);
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if ((mappedkfile = mmap(NULL, ksb.st_size, PROT_READ,
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MAP_FILE | MAP_PRIVATE, kfd, 0)) == (caddr_t)-1)
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err(1, "mmap %s", kfile);
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if (verbose)
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fprintf(stderr, "mapped %s\n", kfile);
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bin = bin_open(kfd, kfile, bfdname);
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if (bin_find_md_root(bin, mappedkfile, ksb.st_size, text_start,
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md_root_image, md_root_size, &md_root_image_offset,
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&md_root_size_offset, &md_root_size_value, verbose) != 0)
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errx(1, "could not find symbols in %s", kfile);
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if (verbose)
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fprintf(stderr, "got symbols from %s\n", kfile);
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if (verbose)
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fprintf(stderr, "root @ %#zx/%u\n",
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md_root_image_offset, md_root_size_value);
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munmap(mappedkfile, ksb.st_size);
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if (extract) {
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if ((fsfd = open(fsfile, O_WRONLY|O_CREAT, 0777)) == -1)
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err(1, "open %s", fsfile);
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left_to_copy = md_root_size_value;
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} else {
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if ((fsfd = open(fsfile, O_RDONLY, 0)) == -1)
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err(1, "open %s", fsfile);
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if (fstat(fsfd, &fssb) == -1)
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err(1, "fstat %s", fsfile);
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if ((uintmax_t)fssb.st_size != (size_t)fssb.st_size)
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errx(1, "fs image %s is too big", fsfile);
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if (fssb.st_size > md_root_size_value)
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errx(1, "fs image %s (%jd bytes) too big for buffer"
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" (%u bytes)", fsfile, (intmax_t) fssb.st_size,
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md_root_size_value);
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left_to_copy = fssb.st_size;
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}
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if (verbose)
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fprintf(stderr, "copying image %s %s %s (%zd bytes)\n", fsfile,
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(extract ? "from" : "into"), kfile, left_to_copy);
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if (lseek(kfd, md_root_image_offset, SEEK_SET) !=
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(off_t)md_root_image_offset)
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err(1, "seek %s", kfile);
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while (left_to_copy > 0) {
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char buf[CHUNKSIZE];
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ssize_t todo;
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int rfd;
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int wfd;
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const char *rfile;
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const char *wfile;
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if (extract) {
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rfd = kfd;
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rfile = kfile;
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wfd = fsfd;
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wfile = fsfile;
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} else {
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rfd = fsfd;
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rfile = fsfile;
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wfd = kfd;
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wfile = kfile;
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}
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todo = (left_to_copy > CHUNKSIZE) ? CHUNKSIZE : left_to_copy;
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if ((rv = read(rfd, buf, todo)) != todo) {
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if (rv == -1)
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err(1, "read %s", rfile);
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else
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errx(1, "unexpected EOF reading %s", rfile);
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}
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if ((rv = write(wfd, buf, todo)) != todo) {
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if (rv == -1)
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err(1, "write %s", wfile);
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else
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errx(1, "short write writing %s", wfile);
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}
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left_to_copy -= todo;
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}
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if (verbose)
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fprintf(stderr, "done copying image\n");
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if (setsize && !extract) {
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char buf[sizeof(uint32_t)];
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if (verbose)
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fprintf(stderr, "setting md_root_size to %jd\n",
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(intmax_t) fssb.st_size);
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if (lseek(kfd, md_root_size_offset, SEEK_SET) !=
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(off_t)md_root_size_offset)
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err(1, "seek %s", kfile);
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bin_put_32(bin, fssb.st_size, buf);
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if (write(kfd, buf, sizeof(buf)) != sizeof(buf))
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err(1, "write %s", kfile);
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}
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close(fsfd);
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close(kfd);
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if (verbose)
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fprintf(stderr, "exiting\n");
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bin_close(bin);
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return 0;
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}
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static void
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usage(void)
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{
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const char **list;
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fprintf(stderr, "Usage: %s [-svx] [-b bfdname] [-I image_symbol] "
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"[-S size_symbol] [-T address] kernel image\n", getprogname());
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fprintf(stderr, "Supported targets:");
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for (list = bin_supported_targets(); *list != NULL; list++)
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fprintf(stderr, " %s", *list);
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fprintf(stderr, "\n");
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exit(1);
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}
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