#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if !defined(lint)
__COPYRIGHT("@(#) Copyright (c) 1996\
Christopher G. Demetriou. All rights reserved.");
__RCSID("$NetBSD: mdsetimage.c,v 1.25 2020/06/14 18:24:21 tsutsui Exp $");
#endif
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "bin.h"
#define CHUNKSIZE (64 * 1024)
static void usage(void) __attribute__((noreturn));
int verbose;
int extract;
int setsize;
static const char *progname;
#undef setprogname
#define setprogname(x) (void)(progname = (x))
#undef getprogname
#define getprogname() (progname)
int
main(int argc, char *argv[])
{
int ch, kfd, fsfd, rv;
struct stat ksb, fssb;
size_t md_root_image_offset, md_root_size_offset;
u_int32_t md_root_size_value;
const char *kfile, *fsfile;
char *mappedkfile;
char *bfdname = NULL;
void *bin;
ssize_t left_to_copy;
const char *md_root_image = "_md_root_image";
const char *md_root_size = "_md_root_size";
unsigned long text_start = ~0;
setprogname(argv[0]);
while ((ch = getopt(argc, argv, "I:S:b:svx")) != -1)
switch (ch) {
case 'I':
md_root_image = optarg;
break;
case 'S':
md_root_size = optarg;
break;
case 'T':
text_start = strtoul(optarg, NULL, 0);
break;
case 'b':
bfdname = optarg;
break;
case 's':
setsize = 1;
break;
case 'v':
verbose = 1;
break;
case 'x':
extract = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
kfile = argv[0];
fsfile = argv[1];
if (extract) {
if ((kfd = open(kfile, O_RDONLY, 0)) == -1)
err(1, "open %s", kfile);
} else {
if ((kfd = open(kfile, O_RDWR, 0)) == -1)
err(1, "open %s", kfile);
}
if (fstat(kfd, &ksb) == -1)
err(1, "fstat %s", kfile);
if ((uintmax_t)ksb.st_size != (size_t)ksb.st_size)
errx(1, "%s too big to map", kfile);
if ((mappedkfile = mmap(NULL, ksb.st_size, PROT_READ,
MAP_FILE | MAP_PRIVATE, kfd, 0)) == (caddr_t)-1)
err(1, "mmap %s", kfile);
if (verbose)
fprintf(stderr, "mapped %s\n", kfile);
bin = bin_open(kfd, kfile, bfdname);
if (bin_find_md_root(bin, mappedkfile, ksb.st_size, text_start,
md_root_image, md_root_size, &md_root_image_offset,
&md_root_size_offset, &md_root_size_value, verbose) != 0)
errx(1, "could not find symbols in %s", kfile);
if (verbose)
fprintf(stderr, "got symbols from %s\n", kfile);
if (verbose)
fprintf(stderr, "root @ %#zx/%u\n",
md_root_image_offset, md_root_size_value);
munmap(mappedkfile, ksb.st_size);
if (extract) {
if ((fsfd = open(fsfile, O_WRONLY|O_CREAT, 0777)) == -1)
err(1, "open %s", fsfile);
left_to_copy = md_root_size_value;
} else {
if ((fsfd = open(fsfile, O_RDONLY, 0)) == -1)
err(1, "open %s", fsfile);
if (fstat(fsfd, &fssb) == -1)
err(1, "fstat %s", fsfile);
if ((uintmax_t)fssb.st_size != (size_t)fssb.st_size)
errx(1, "fs image %s is too big", fsfile);
if (fssb.st_size > md_root_size_value)
errx(1, "fs image %s (%jd bytes) too big for buffer"
" (%u bytes)", fsfile, (intmax_t) fssb.st_size,
md_root_size_value);
left_to_copy = fssb.st_size;
}
if (verbose)
fprintf(stderr, "copying image %s %s %s (%zd bytes)\n", fsfile,
(extract ? "from" : "into"), kfile, left_to_copy);
if (lseek(kfd, md_root_image_offset, SEEK_SET) !=
(off_t)md_root_image_offset)
err(1, "seek %s", kfile);
while (left_to_copy > 0) {
char buf[CHUNKSIZE];
ssize_t todo;
int rfd;
int wfd;
const char *rfile;
const char *wfile;
if (extract) {
rfd = kfd;
rfile = kfile;
wfd = fsfd;
wfile = fsfile;
} else {
rfd = fsfd;
rfile = fsfile;
wfd = kfd;
wfile = kfile;
}
todo = (left_to_copy > CHUNKSIZE) ? CHUNKSIZE : left_to_copy;
if ((rv = read(rfd, buf, todo)) != todo) {
if (rv == -1)
err(1, "read %s", rfile);
else
errx(1, "unexpected EOF reading %s", rfile);
}
if ((rv = write(wfd, buf, todo)) != todo) {
if (rv == -1)
err(1, "write %s", wfile);
else
errx(1, "short write writing %s", wfile);
}
left_to_copy -= todo;
}
if (verbose)
fprintf(stderr, "done copying image\n");
if (setsize && !extract) {
char buf[sizeof(uint32_t)];
if (verbose)
fprintf(stderr, "setting md_root_size to %jd\n",
(intmax_t) fssb.st_size);
if (lseek(kfd, md_root_size_offset, SEEK_SET) !=
(off_t)md_root_size_offset)
err(1, "seek %s", kfile);
bin_put_32(bin, fssb.st_size, buf);
if (write(kfd, buf, sizeof(buf)) != sizeof(buf))
err(1, "write %s", kfile);
}
close(fsfd);
close(kfd);
if (verbose)
fprintf(stderr, "exiting\n");
bin_close(bin);
return 0;
}
static void
usage(void)
{
const char **list;
fprintf(stderr, "Usage: %s [-svx] [-b bfdname] [-I image_symbol] "
"[-S size_symbol] [-T address] kernel image\n", getprogname());
fprintf(stderr, "Supported targets:");
for (list = bin_supported_targets(); *list != NULL; list++)
fprintf(stderr, " %s", *list);
fprintf(stderr, "\n");
exit(1);
}
