/* grub-mkimage.c - make a bootable image */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/types.h>
#include <grub/machine/boot.h>
#include <grub/machine/kernel.h>
#include <grub/machine/memory.h>
#include <grub/i18n.h>
#include <grub/kernel.h>
#include <grub/disk.h>
#include <grub/util/misc.h>
#include <grub/util/resolve.h>
#include <grub/misc.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#define _GNU_SOURCE 1
#include <getopt.h>
#include "progname.h"
#ifdef ENABLE_LZMA
#include <grub/lib/LzmaEnc.h>
static void *SzAlloc(void *p, size_t size) { p = p; return xmalloc(size); }
static void SzFree(void *p, void *address) { p = p; free(address); }
static ISzAlloc g_Alloc = { SzAlloc, SzFree };
static void
compress_kernel (char *kernel_img, size_t kernel_size,
char **core_img, size_t *core_size)
{
CLzmaEncProps props;
unsigned char out_props[5];
size_t out_props_size = 5;
LzmaEncProps_Init(&props);
props.dictSize = 1 << 16;
props.lc = 3;
props.lp = 0;
props.pb = 2;
props.numThreads = 1;
if (kernel_size < GRUB_KERNEL_MACHINE_RAW_SIZE)
grub_util_error ("the core image is too small");
*core_img = xmalloc (kernel_size);
memcpy (*core_img, kernel_img, GRUB_KERNEL_MACHINE_RAW_SIZE);
*core_size = kernel_size - GRUB_KERNEL_MACHINE_RAW_SIZE;
if (LzmaEncode((unsigned char *) *core_img + GRUB_KERNEL_MACHINE_RAW_SIZE,
core_size,
(unsigned char *) kernel_img + GRUB_KERNEL_MACHINE_RAW_SIZE,
kernel_size - GRUB_KERNEL_MACHINE_RAW_SIZE,
&props, out_props, &out_props_size,
0, NULL, &g_Alloc, &g_Alloc) != SZ_OK)
grub_util_error ("cannot compress the kernel image");
*core_size += GRUB_KERNEL_MACHINE_RAW_SIZE;
}
#else /* No lzma compression */
static void
compress_kernel (char *kernel_img, size_t kernel_size,
char **core_img, size_t *core_size)
{
*core_img = xmalloc (kernel_size);
memcpy (*core_img, kernel_img, kernel_size);
*core_size = kernel_size;
}
#endif /* No lzma compression */
static void
generate_image (const char *dir, char *prefix, FILE *out, char *mods[],
char *memdisk_path, char *config_path)
{
char *kernel_img, *boot_img, *core_img;
size_t kernel_size, boot_size, total_module_size, core_size;
size_t memdisk_size = 0, config_size = 0;
char *kernel_path, *boot_path;
size_t offset;
struct grub_util_path_list *path_list, *p, *next;
struct grub_module_info *modinfo;
path_list = grub_util_resolve_dependencies (dir, "moddep.lst", mods);
kernel_path = grub_util_get_path (dir, "kernel.img");
kernel_size = grub_util_get_image_size (kernel_path);
total_module_size = sizeof (struct grub_module_info);
if (memdisk_path)
{
memdisk_size = ALIGN_UP(grub_util_get_image_size (memdisk_path), 512);
grub_util_info ("the size of memory disk is 0x%x", memdisk_size);
total_module_size += memdisk_size + sizeof (struct grub_module_header);
}
if (config_path)
{
config_size = grub_util_get_image_size (config_path) + 1;
grub_util_info ("the size of config file is 0x%x", config_size);
total_module_size += config_size + sizeof (struct grub_module_header);
}
for (p = path_list; p; p = p->next)
total_module_size += (grub_util_get_image_size (p->name)
+ sizeof (struct grub_module_header));
grub_util_info ("the total module size is 0x%x", total_module_size);
kernel_img = xmalloc (kernel_size + total_module_size);
grub_util_load_image (kernel_path, kernel_img);
if (GRUB_KERNEL_MACHINE_PREFIX + strlen (prefix) + 1 > GRUB_KERNEL_MACHINE_DATA_END)
grub_util_error ("prefix too long");
strcpy (kernel_img + GRUB_KERNEL_MACHINE_PREFIX, prefix);
/* Fill in the grub_module_info structure. */
modinfo = (struct grub_module_info *) (kernel_img + kernel_size);
memset (modinfo, 0, sizeof (struct grub_module_info));
modinfo->magic = GRUB_MODULE_MAGIC;
modinfo->offset = sizeof (struct grub_module_info);
modinfo->size = total_module_size;
offset = kernel_size + sizeof (struct grub_module_info);
for (p = path_list; p; p = p->next)
{
struct grub_module_header *header;
size_t mod_size;
mod_size = grub_util_get_image_size (p->name);
header = (struct grub_module_header *) (kernel_img + offset);
memset (header, 0, sizeof (struct grub_module_header));
header->type = OBJ_TYPE_ELF;
header->size = grub_host_to_target32 (mod_size + sizeof (*header));
offset += sizeof (*header);
grub_util_load_image (p->name, kernel_img + offset);
offset += mod_size;
}
if (memdisk_path)
{
struct grub_module_header *header;
header = (struct grub_module_header *) (kernel_img + offset);
memset (header, 0, sizeof (struct grub_module_header));
header->type = OBJ_TYPE_MEMDISK;
header->size = grub_host_to_target32 (memdisk_size + sizeof (*header));
offset += sizeof (*header);
grub_util_load_image (memdisk_path, kernel_img + offset);
offset += memdisk_size;
}
if (config_path)
{
struct grub_module_header *header;
header = (struct grub_module_header *) (kernel_img + offset);
memset (header, 0, sizeof (struct grub_module_header));
header->type = OBJ_TYPE_CONFIG;
header->size = grub_host_to_target32 (config_size + sizeof (*header));
offset += sizeof (*header);
grub_util_load_image (config_path, kernel_img + offset);
offset += config_size;
*(kernel_img + offset - 1) = 0;
}
grub_util_info ("kernel_img=%p, kernel_size=0x%x", kernel_img, kernel_size);
compress_kernel (kernel_img, kernel_size + total_module_size,
&core_img, &core_size);
grub_util_info ("the core size is 0x%x", core_size);
#if defined(GRUB_MACHINE_PCBIOS)
{
unsigned num;
num = ((core_size + GRUB_DISK_SECTOR_SIZE - 1) >> GRUB_DISK_SECTOR_BITS);
if (num > 0xffff)
grub_util_error ("the core image is too big");
boot_path = grub_util_get_path (dir, "diskboot.img");
boot_size = grub_util_get_image_size (boot_path);
if (boot_size != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("diskboot.img is not one sector size");
boot_img = grub_util_read_image (boot_path);
/* i386 is a little endian architecture. */
*((grub_uint16_t *) (boot_img + GRUB_DISK_SECTOR_SIZE
- GRUB_BOOT_MACHINE_LIST_SIZE + 8))
= grub_cpu_to_le16 (num);
grub_util_write_image (boot_img, boot_size, out);
free (boot_img);
free (boot_path);
}
#elif defined(GRUB_MACHINE_QEMU)
{
char *rom_img;
size_t rom_size;
boot_path = grub_util_get_path (dir, "boot.img");
boot_size = grub_util_get_image_size (boot_path);
boot_img = grub_util_read_image (boot_path);
/* Rom sizes must be 64k-aligned. */
rom_size = ALIGN_UP (core_size + boot_size, 64 * 1024);
rom_img = xmalloc (rom_size);
memset (rom_img, 0, rom_size);
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_CORE_ENTRY_ADDR))
= grub_cpu_to_le32 ((grub_uint32_t) -rom_size);
memcpy (rom_img, core_img, core_size);
*((grub_int32_t *) (boot_img + GRUB_BOOT_MACHINE_CORE_ENTRY_ADDR))
= grub_cpu_to_le32 ((grub_uint32_t) -rom_size);
memcpy (rom_img + rom_size - boot_size, boot_img, boot_size);
free (core_img);
core_img = rom_img;
core_size = rom_size;
free (boot_img);
free (boot_path);
}
#endif
#ifdef GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE))
= grub_cpu_to_le32 (total_module_size);
#endif
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_KERNEL_IMAGE_SIZE))
= grub_cpu_to_le32 (kernel_size);
#ifdef GRUB_KERNEL_MACHINE_COMPRESSED_SIZE
*((grub_uint32_t *) (core_img + GRUB_KERNEL_MACHINE_COMPRESSED_SIZE))
= grub_cpu_to_le32 (core_size - GRUB_KERNEL_MACHINE_RAW_SIZE);
#endif
#if defined(GRUB_KERNEL_MACHINE_INSTALL_DOS_PART) && defined(GRUB_KERNEL_MACHINE_INSTALL_BSD_PART)
/* If we included a drive in our prefix, let GRUB know it doesn't have to
prepend the drive told by BIOS. */
if (prefix[0] == '(')
{
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_INSTALL_DOS_PART))
= grub_cpu_to_le32 (-2);
*((grub_int32_t *) (core_img + GRUB_KERNEL_MACHINE_INSTALL_BSD_PART))
= grub_cpu_to_le32 (-2);
}
#endif
#ifdef GRUB_MACHINE_PCBIOS
if (GRUB_KERNEL_MACHINE_LINK_ADDR + core_size > GRUB_MEMORY_MACHINE_UPPER)
grub_util_error ("Core image is too big (%p > %p)\n",
GRUB_KERNEL_MACHINE_LINK_ADDR + core_size, GRUB_MEMORY_MACHINE_UPPER);
#endif
grub_util_write_image (core_img, core_size, out);
free (kernel_img);
free (core_img);
free (kernel_path);
while (path_list)
{
next = path_list->next;
free ((void *) path_list->name);
free (path_list);
path_list = next;
}
}
static struct option options[] =
{
{"directory", required_argument, 0, 'd'},
{"prefix", required_argument, 0, 'p'},
{"memdisk", required_argument, 0, 'm'},
{"config", required_argument, 0, 'c'},
{"output", required_argument, 0, 'o'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'V'},
{"verbose", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
static void
usage (int status)
{
if (status)
fprintf (stderr, _("Try ``%s --help'' for more information.\n"), program_name);
else
printf ("\
Usage: grub-mkimage [OPTION]... [MODULES]\n\
\n\
Make a bootable image of GRUB.\n\
\n\
-d, --directory=DIR use images and modules under DIR [default=%s]\n\
-p, --prefix=DIR set grub_prefix directory [default=%s]\n\
-m, --memdisk=FILE embed FILE as a memdisk image\n\
-c, --config=FILE embed FILE as boot config\n\
-o, --output=FILE output a generated image to FILE [default=stdout]\n\
-h, --help display this message and exit\n\
-V, --version print version information and exit\n\
-v, --verbose print verbose messages\n\
\n\
Report bugs to <%s>.\n\
", GRUB_LIBDIR, DEFAULT_DIRECTORY, PACKAGE_BUGREPORT);
exit (status);
}
int
main (int argc, char *argv[])
{
char *output = NULL;
char *dir = NULL;
char *prefix = NULL;
char *memdisk = NULL;
char *config = NULL;
FILE *fp = stdout;
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
while (1)
{
int c = getopt_long (argc, argv, "d:p:m:c:o:hVv", options, 0);
if (c == -1)
break;
else
switch (c)
{
case 'o':
if (output)
free (output);
output = xstrdup (optarg);
break;
case 'd':
if (dir)
free (dir);
dir = xstrdup (optarg);
break;
case 'm':
if (memdisk)
free (memdisk);
memdisk = xstrdup (optarg);
if (prefix)
free (prefix);
prefix = xstrdup ("(memdisk)/boot/grub");
break;
case 'c':
if (config)
free (config);
config = xstrdup (optarg);
break;
case 'h':
usage (0);
break;
case 'p':
if (prefix)
free (prefix);
prefix = xstrdup (optarg);
break;
case 'V':
printf ("grub-mkimage (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION);
return 0;
case 'v':
verbosity++;
break;
default:
usage (1);
break;
}
}
if (output)
{
fp = fopen (output, "wb");
if (! fp)
grub_util_error ("cannot open %s", output);
free (output);
}
generate_image (dir ? : GRUB_LIBDIR, prefix ? : DEFAULT_DIRECTORY, fp,
argv + optind, memdisk, config);
fclose (fp);
if (dir)
free (dir);
return 0;
}