18a5822eff
They are used as build tools for cross compilation. This import does not include the full distribution. Rather, it sports a shell script that will download and patch the distribution when compiled from /usr/src/tools (yet to be committed). This part of the source tree is only necessary for cross compilation. It's not used or compiled for native builds.
317 lines
7.8 KiB
C
317 lines
7.8 KiB
C
/* $NetBSD: mdsetimage.c,v 1.2 2010/11/06 16:03:23 uebayasi Exp $ */
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/* from: NetBSD: mdsetimage.c,v 1.15 2001/03/21 23:46:48 cgd 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 1.2 2010/11/06 16:03:23 uebayasi 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 <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 <bfd.h>
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struct symbols {
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char *name;
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size_t offset;
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};
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#define X_MD_ROOT_IMAGE 0
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#define X_MD_ROOT_SIZE 1
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#define CHUNKSIZE (64 * 1024)
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int main(int, char *[]);
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static void usage(void) __attribute__((noreturn));
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static int find_md_root(bfd *, struct symbols symbols[]);
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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_offset, md_root_size_offset;
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u_int32_t md_root_size;
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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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bfd *abfd;
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ssize_t left_to_copy;
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struct symbols md_root_symbols[3] = { { 0 } };
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md_root_symbols[X_MD_ROOT_IMAGE].name = "_md_root_image";
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md_root_symbols[X_MD_ROOT_SIZE].name = "_md_root_size";
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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_symbols[X_MD_ROOT_IMAGE].name = optarg;
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break;
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case 'S':
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md_root_symbols[X_MD_ROOT_SIZE].name = optarg;
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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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bfd_init();
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if ((abfd = bfd_fdopenr(kfile, bfdname, kfd)) == NULL) {
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bfd_perror("open");
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exit(1);
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}
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if (!bfd_check_format(abfd, bfd_object)) {
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bfd_perror("check format");
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exit(1);
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}
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if (find_md_root(abfd, md_root_symbols) != 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 (fstat(kfd, &ksb) == -1)
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err(1, "fstat %s", kfile);
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if (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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md_root_offset = md_root_symbols[X_MD_ROOT_IMAGE].offset;
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md_root_size_offset = md_root_symbols[X_MD_ROOT_SIZE].offset;
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md_root_size = bfd_get_32(abfd, &mappedkfile[md_root_size_offset]);
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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;
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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 (fssb.st_size != (size_t)fssb.st_size)
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errx(1, "fs image is too big");
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if (fssb.st_size > md_root_size)
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errx(1, "fs image (%lld bytes) too big for buffer (%lu bytes)",
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(long long)fssb.st_size, (unsigned long)md_root_size);
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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\n", fsfile,
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(extract ? "from" : "into"), kfile);
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if (lseek(kfd, md_root_offset, SEEK_SET) != md_root_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 %llu\n",
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(unsigned long long) fssb.st_size);
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if (lseek(kfd, md_root_size_offset, SEEK_SET) !=
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md_root_size_offset)
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err(1, "seek %s", kfile);
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bfd_put_32(abfd, 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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bfd_close_all_done(abfd);
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exit(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,
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"usage: %s [-svx] [-b bfdname] kernel image\n",
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getprogname());
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fprintf(stderr, "supported targets:");
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for (list = bfd_target_list(); *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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static int
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find_md_root(bfd *abfd, struct symbols symbols[])
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{
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long i;
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long storage_needed;
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long number_of_symbols;
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asymbol **symbol_table = NULL;
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struct symbols *s;
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storage_needed = bfd_get_symtab_upper_bound(abfd);
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if (storage_needed <= 0)
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return (1);
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symbol_table = (asymbol **)malloc(storage_needed);
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if (symbol_table == NULL)
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return (1);
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number_of_symbols = bfd_canonicalize_symtab(abfd, symbol_table);
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if (number_of_symbols <= 0) {
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free(symbol_table);
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return (1);
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}
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for (i = 0; i < number_of_symbols; i++) {
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for (s = symbols; s->name != NULL; s++) {
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const char *sym = symbol_table[i]->name;
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/*
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* match symbol prefix '_' or ''.
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*/
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if (!strcmp(s->name, sym) ||
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!strcmp(s->name + 1, sym)) {
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s->offset =
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(size_t)(symbol_table[i]->section->filepos
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+ symbol_table[i]->value);
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}
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}
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}
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free(symbol_table);
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for (s = symbols; s->name != NULL; s++) {
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if (s->offset == 0)
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return (1);
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}
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return (0);
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}
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