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/* $OpenBSD: mkuboot.c,v 1.1 2010/02/12 17:30:41 mk Exp $ */
/*
* Copyright (c) 2008 Mark Kettenis
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <err.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <zlib.h>
#define IH_OS_OPENBSD 1 /* OpenBSD */
#define IH_OS_LINUX 5 /* Linux */
#define IH_ARCH_ALPHA 1 /* Alpha */
#define IH_ARCH_ARM 2 /* ARM */
#define IH_ARCH_I386 3 /* Intel x86 */
#define IH_ARCH_IA64 4 /* IA64 */
#define IH_ARCH_MIPS 5 /* MIPS */
#define IH_ARCH_MIPS64 6 /* MIPS 64 Bit */
#define IH_ARCH_PPC 7 /* PowerPC */
#define IH_ARCH_SH 9 /* SuperH */
#define IH_ARCH_SPARC 10 /* Sparc */
#define IH_ARCH_SPARC64 11 /* Sparc 64 Bit */
#define IH_ARCH_M68K 12 /* M68K */
#define IH_TYPE_STANDALONE 1 /* Standalone */
#define IH_TYPE_KERNEL 2 /* OS Kernel Image */
#define IH_COMP_NONE 0 /* No compression */
#define IH_MAGIC 0x27051956 /* Image Magic Number */
#define IH_NMLEN 32 /* Image Name Length */
struct image_header {
uint32_t ih_magic;
uint32_t ih_hcrc;
uint32_t ih_time;
uint32_t ih_size;
uint32_t ih_load;
uint32_t ih_ep;
uint32_t ih_dcrc;
uint8_t ih_os;
uint8_t ih_arch;
uint8_t ih_type;
uint8_t ih_comp;
uint8_t ih_name[IH_NMLEN];
};
extern char *__progname;
void usage(void);
struct arch_map {
int id;
const char *arch;
};
static const struct arch_map archmap[] = {
{ IH_ARCH_ALPHA, "alpha" },
{ IH_ARCH_IA64, "amd64" },
{ IH_ARCH_ARM, "arm" },
{ IH_ARCH_I386, "i386" },
{ IH_ARCH_M68K, "m68k" },
{ IH_ARCH_MIPS, "mips" },
{ IH_ARCH_MIPS64, "mips64" },
{ IH_ARCH_PPC, "powerpc" },
{ IH_ARCH_SPARC, "sparc" },
{ IH_ARCH_SPARC64, "sparc64" },
{ IH_ARCH_SH, "superh" },
{ 0, NULL }
};
struct os_map {
int id;
const char *arch;
};
static const struct os_map osmap[] = {
{ IH_OS_OPENBSD, "OpenBSD" },
{ IH_OS_LINUX, "Linux" },
{ 0, NULL }
};
int
main(int argc, char *argv[])
{
struct image_header ih;
const struct arch_map *mapptr;
const struct os_map *osmapptr;
const char *iname, *oname;
const char *arch = MACHINE_ARCH;
const char *os = "OpenBSD";
int ifd, ofd;
u_long crc;
ssize_t nbytes;
char buf[BUFSIZ];
int c, ep, load;
ep = load = 0;
while ((c = getopt(argc, argv, "a:e:l:o:")) != -1) {
switch (c) {
case 'a':
arch = optarg;
break;
case 'e':
sscanf(optarg, "0x%x", &ep);
break;
case 'l':
sscanf(optarg, "0x%x", &load);
break;
case 'o':
os = optarg;
break;
default:
usage();
}
}
for (mapptr = archmap; mapptr->arch; mapptr++)
if (strcasecmp(arch, mapptr->arch) == 0)
break;
if (mapptr->arch == NULL) {
printf("unknown arch '%s'\n", arch);
usage();
}
for (osmapptr = osmap; osmapptr->arch; osmapptr++)
if (strcasecmp(os, osmapptr->arch) == 0)
break;
if (osmapptr->arch == NULL) {
printf("unknown OS '%s'\n", os);
usage();
}
if (argc - optind != 2)
usage();
iname = argv[optind++];
oname = argv[optind++];
/* Initialize U-Boot header. */
bzero(&ih, sizeof ih);
ih.ih_magic = htobe32(IH_MAGIC);
ih.ih_time = htobe32(time(NULL));
ih.ih_load = htobe32(load);
ih.ih_ep = htobe32(ep);
ih.ih_os = osmapptr->id;
ih.ih_arch = mapptr->id;
ih.ih_type = IH_TYPE_KERNEL;
ih.ih_comp = IH_COMP_NONE;
strlcpy(ih.ih_name, "boot", sizeof ih.ih_name);
ifd = open(iname, O_RDONLY);
if (ifd < 0)
err(1, "%s", iname);
ofd = open(oname, O_RDWR | O_TRUNC | O_CREAT, 0644);
if (ofd < 0)
err(1, "%s", oname);
/* Write initial header. */
if (write(ofd, &ih, sizeof ih) != sizeof ih)
err(1, "%s", oname);
/* Copy data, calculating the data CRC as we go. */
crc = crc32(0L, Z_NULL, 0);
while ((nbytes = read(ifd, buf, sizeof buf)) != 0) {
if (nbytes == -1)
err(1, "%s", iname);
if (write(ofd, buf, nbytes) != nbytes)
err(1, "%s", oname);
crc = crc32(crc, buf, nbytes);
ih.ih_size += nbytes;
}
ih.ih_dcrc = htobe32(crc);
ih.ih_size = htobe32(ih.ih_size);
/* Calculate header CRC. */
crc = crc32(0, (void *)&ih, sizeof ih);
ih.ih_hcrc = htobe32(crc);
/* Write finalized header. */
if (lseek(ofd, 0, SEEK_SET) != 0)
err(1, "%s", oname);
if (write(ofd, &ih, sizeof ih) != sizeof ih)
err(1, "%s", oname);
return(0);
}
void
usage(void)
{
const struct arch_map *mapptr;
const struct os_map *osmapptr;
(void)fprintf(stderr,
"usage: %s [-a arch] [-e entry] [-l loadaddr] [-o os] "
"infile outfile\n", __progname);
(void)fprintf(stderr,
"arch is one of:");
for (mapptr = archmap; mapptr->arch; mapptr++)
(void)fprintf(stderr, " %s", mapptr->arch);
(void)fprintf(stderr, "\n");
(void)fprintf(stderr,
"os is one of:");
for (osmapptr = osmap; osmapptr->arch; osmapptr++)
(void)fprintf(stderr, " %s", osmapptr->arch);
(void)fprintf(stderr, "\n");
exit(1);
}
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