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grub/util/sparc64/ieee1275/grub-setup.c
BVK Chaitanya 8c41176882 automake commit without merge history
2010-05-06 11:34:04 +05:30

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/* grub-setup.c - make GRUB usable */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 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/emu/misc.h>
#include <grub/util/misc.h>
#include <grub/device.h>
#include <grub/i18n.h>
#include <grub/disk.h>
#include <grub/file.h>
#include <grub/fs.h>
#include <grub/partition.h>
#include <grub/msdos_partition.h>
#include <grub/gpt_partition.h>
#include <grub/env.h>
#include <grub/emu/hostdisk.h>
#include <grub/machine/boot.h>
#include <grub/machine/kernel.h>
#include <grub/term.h>
#include <grub/util/raid.h>
#include <grub/util/lvm.h>
#include <grub/util/ofpath.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <grub/emu/getroot.h>
#define _GNU_SOURCE 1
#include <getopt.h>
#include "progname.h"
/* This program fills in various fields inside of the 'boot' and 'core'
* image files.
*
* The 'boot' image needs to know the OBP path name of the root
* device. It also needs to know the initial block number of
* 'core' (which is 'diskboot' concatenated with 'kernel' and
* all the modules, this is created by grub-mkimage). This resulting
* 'boot' image is 512 bytes in size and is placed in the second block
* of a partition.
*
* The initial 'diskboot' block acts as a loader for the actual GRUB
* kernel. It contains the loading code and then a block list.
*
* The block list of 'core' starts at the end of the 'diskboot' image
* and works it's way backwards towards the end of the code of 'diskboot'.
*
* We patch up the images with the necessary values and write out the
* result.
*/
#define DEFAULT_BOOT_FILE "boot.img"
#define DEFAULT_CORE_FILE "core.img"
/* This is the blocklist used in the diskboot image. */
struct boot_blocklist
{
grub_uint64_t start;
grub_uint32_t len;
} __attribute__ ((packed));
static void
setup (const char *prefix, const char *dir,
const char *boot_file, const char *core_file,
const char *root, const char *dest)
{
char *boot_path, *core_path;
char *boot_img, *core_img;
size_t boot_size, core_size;
grub_uint16_t core_sectors;
grub_device_t root_dev, dest_dev;
char *boot_devpath;
grub_disk_addr_t *kernel_byte;
struct boot_blocklist *first_block, *block;
char *tmp_img;
int i;
grub_disk_addr_t first_sector;
grub_uint16_t last_length = GRUB_DISK_SECTOR_SIZE;
grub_file_t file;
FILE *fp;
struct { grub_uint64_t start; grub_uint64_t end; } embed_region;
embed_region.start = embed_region.end = ~0UL;
auto void NESTED_FUNC_ATTR save_first_sector (grub_disk_addr_t sector,
unsigned int offset,
unsigned int length);
auto void NESTED_FUNC_ATTR save_blocklists (grub_disk_addr_t sector,
unsigned int offset,
unsigned int length);
void NESTED_FUNC_ATTR save_first_sector (grub_disk_addr_t sector,
unsigned int offset,
unsigned int length)
{
grub_util_info ("first sector is <%llu,%u,%u>", sector, offset, length);
if (offset != 0 || length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("the first sector of the core file "
"is not sector-aligned");
first_sector = sector;
}
void NESTED_FUNC_ATTR save_blocklists (grub_disk_addr_t sector,
unsigned int offset,
unsigned int length)
{
struct boot_blocklist *prev = block + 1;
grub_util_info ("saving <%llu,%u,%u>", sector, offset, length);
if (offset != 0 || last_length != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("non-sector-aligned data is found in the core file");
if (block != first_block
&& (grub_be_to_cpu64 (prev->start)
+ grub_be_to_cpu16 (prev->len)) == sector)
prev->len = grub_cpu_to_be16 (grub_be_to_cpu16 (prev->len) + 1);
else
{
block->start = grub_cpu_to_be64 (sector);
block->len = grub_cpu_to_be16 (1);
block--;
if (block->len)
grub_util_error ("the sectors of the core file are too fragmented");
}
last_length = length;
}
/* Read the boot image by the OS service. */
boot_path = grub_util_get_path (dir, boot_file);
boot_size = grub_util_get_image_size (boot_path);
if (boot_size != GRUB_DISK_SECTOR_SIZE)
grub_util_error ("the size of `%s' is not %d",
boot_path, GRUB_DISK_SECTOR_SIZE);
boot_img = grub_util_read_image (boot_path);
free (boot_path);
/* Set the addresses of variables in the boot image. */
boot_devpath = (char *) (boot_img
+ GRUB_BOOT_AOUT_HEADER_SIZE
+ GRUB_BOOT_MACHINE_BOOT_DEVPATH);
kernel_byte = (grub_disk_addr_t *) (boot_img
+ GRUB_BOOT_AOUT_HEADER_SIZE
+ GRUB_BOOT_MACHINE_KERNEL_BYTE);
core_path = grub_util_get_path (dir, core_file);
core_size = grub_util_get_image_size (core_path);
core_sectors = ((core_size + GRUB_DISK_SECTOR_SIZE - 1)
>> GRUB_DISK_SECTOR_BITS);
if (core_size < GRUB_DISK_SECTOR_SIZE)
grub_util_error ("the size of `%s' is too small", core_path);
core_img = grub_util_read_image (core_path);
free (core_path);
/* Have FIRST_BLOCK to point to the first blocklist. */
first_block = (struct boot_blocklist *) (core_img
+ GRUB_DISK_SECTOR_SIZE
- sizeof (*block));
grub_util_info ("root is `%s', dest is `%s'", root, dest);
/* Open the root device and the destination device. */
grub_util_info ("Opening root");
root_dev = grub_device_open (root);
if (! root_dev)
grub_util_error ("%s", grub_errmsg);
grub_util_info ("Opening dest");
dest_dev = grub_device_open (dest);
if (! dest_dev)
grub_util_error ("%s", grub_errmsg);
grub_util_info ("setting the root device to `%s'", root);
if (grub_env_set ("root", root) != GRUB_ERR_NONE)
grub_util_error ("%s", grub_errmsg);
/* The core image must be put on a filesystem unfortunately. */
grub_util_info ("will leave the core image on the filesystem");
/* Make sure that GRUB reads the identical image as the OS. */
tmp_img = xmalloc (core_size);
core_path = grub_util_get_path (prefix, core_file);
/* It is a Good Thing to sync two times. */
sync ();
sync ();
#define MAX_TRIES 5
for (i = 0; i < MAX_TRIES; i++)
{
grub_util_info ("attempting to read the core image `%s' from GRUB%s",
core_path, (i == 0) ? "" : " again");
grub_disk_cache_invalidate_all ();
file = grub_file_open (core_path);
if (file)
{
if (grub_file_size (file) != core_size)
grub_util_info ("succeeded in opening the core image but the size is different (%d != %d)",
(int) grub_file_size (file), (int) core_size);
else if (grub_file_read (file, tmp_img, core_size)
!= (grub_ssize_t) core_size)
grub_util_info ("succeeded in opening the core image but cannot read %d bytes",
(int) core_size);
else if (memcmp (core_img, tmp_img, core_size) != 0)
{
#if 0
FILE *dump;
FILE *dump2;
dump = fopen ("dump.img", "wb");
if (dump)
{
fwrite (tmp_img, 1, core_size, dump);
fclose (dump);
}
dump2 = fopen ("dump2.img", "wb");
if (dump2)
{
fwrite (core_img, 1, core_size, dump2);
fclose (dump2);
}
#endif
grub_util_info ("succeeded in opening the core image but the data is different");
}
else
{
grub_file_close (file);
break;
}
grub_file_close (file);
}
else
grub_util_info ("couldn't open the core image");
if (grub_errno)
grub_util_info ("error message = %s", grub_errmsg);
grub_errno = GRUB_ERR_NONE;
sync ();
sleep (1);
}
if (i == MAX_TRIES)
grub_util_error ("cannot read `%s' correctly", core_path);
/* Clean out the blocklists. */
block = first_block;
while (block->len)
{
block->start = 0;
block->len = 0;
block--;
if ((char *) block <= core_img)
grub_util_error ("no terminator in the core image");
}
/* Now read the core image to determine where the sectors are. */
file = grub_file_open (core_path);
if (! file)
grub_util_error ("%s", grub_errmsg);
file->read_hook = save_first_sector;
if (grub_file_read (file, tmp_img, GRUB_DISK_SECTOR_SIZE)
!= GRUB_DISK_SECTOR_SIZE)
grub_util_error ("failed to read the first sector of the core image");
block = first_block;
file->read_hook = save_blocklists;
if (grub_file_read (file, tmp_img, core_size - GRUB_DISK_SECTOR_SIZE)
!= (grub_ssize_t) core_size - GRUB_DISK_SECTOR_SIZE)
grub_util_error ("failed to read the rest sectors of the core image");
if (file->device->disk->id != dest_dev->disk->id)
{
const char *dest_ofpath;
dest_ofpath
= grub_util_devname_to_ofpath (grub_util_biosdisk_get_osdev (file->device->disk));
grub_util_info ("dest_ofpath is `%s'", dest_ofpath);
strncpy (boot_devpath, dest_ofpath, GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH - 1);
boot_devpath[GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH - 1] = 0;
}
else
{
grub_util_info ("non cross-disk install");
memset (boot_devpath, 0, GRUB_BOOT_MACHINE_BOOT_DEVPATH_END
- GRUB_BOOT_MACHINE_BOOT_DEVPATH);
}
grub_file_close (file);
free (core_path);
free (tmp_img);
*kernel_byte = grub_cpu_to_be64 (first_sector << GRUB_DISK_SECTOR_BITS);
grub_util_info ("boot device path %s, prefix is %s, dest is %s",
boot_devpath, prefix, dest);
/* Write the first two sectors of the core image onto the disk. */
core_path = grub_util_get_path (dir, core_file);
grub_util_info ("opening the core image `%s'", core_path);
fp = fopen (core_path, "r+b");
if (! fp)
grub_util_error ("cannot open `%s'", core_path);
grub_util_write_image (core_img, GRUB_DISK_SECTOR_SIZE, fp);
fclose (fp);
free (core_path);
/* Write the boot image onto the disk. */
if (grub_disk_write (dest_dev->disk, 1, 0, GRUB_DISK_SECTOR_SIZE, boot_img))
grub_util_error ("%s", grub_errmsg);
/* Sync is a Good Thing. */
sync ();
free (core_img);
free (boot_img);
grub_device_close (dest_dev);
grub_device_close (root_dev);
}
static struct option options[] =
{
{"boot-image", required_argument, 0, 'b'},
{"core-image", required_argument, 0, 'c'},
{"directory", required_argument, 0, 'd'},
{"device-map", required_argument, 0, 'm'},
{"root-device", required_argument, 0, 'r'},
{"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: %s [OPTION]... DEVICE\n\
\n\
Set up images to boot from DEVICE.\n\
DEVICE must be a GRUB device (e.g. `(hd0,1)').\n\
\n\
-b, --boot-image=FILE use FILE as the boot image [default=%s]\n\
-c, --core-image=FILE use FILE as the core image [default=%s]\n\
-d, --directory=DIR use GRUB files in the directory DIR [default=%s]\n\
-m, --device-map=FILE use FILE as the device map [default=%s]\n\
-r, --root-device=DEV use DEV as the root device [default=guessed]\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\
", program_name,
DEFAULT_BOOT_FILE, DEFAULT_CORE_FILE, DEFAULT_DIRECTORY,
DEFAULT_DEVICE_MAP, PACKAGE_BUGREPORT);
exit (status);
}
struct grub_setup_info
{
char *boot_file;
char *core_file;
char *dir;
char *dev_map;
char *root_dev;
char *prefix;
char *dest_dev;
};
static void
init_info (struct grub_setup_info *gp)
{
gp->boot_file = NULL;
gp->core_file = NULL;
gp->dir = NULL;
gp->dev_map = NULL;
gp->root_dev = NULL;
gp->prefix = NULL;
gp->dest_dev = NULL;
}
static int
parse_options (struct grub_setup_info *gp, int argc, char *argv[])
{
while (1)
{
int c = getopt_long (argc, argv, "b:c:d:m:r:hVv", options, 0);
if (c == -1)
break;
else
switch (c)
{
case 'b':
if (gp->boot_file)
free (gp->boot_file);
gp->boot_file = xstrdup (optarg);
break;
case 'c':
if (gp->core_file)
free (gp->core_file);
gp->core_file = xstrdup (optarg);
break;
case 'd':
if (gp->dir)
free (gp->dir);
gp->dir = xstrdup (optarg);
break;
case 'm':
if (gp->dev_map)
free (gp->dev_map);
gp->dev_map = xstrdup (optarg);
break;
case 'r':
if (gp->root_dev)
free (gp->root_dev);
gp->root_dev = xstrdup (optarg);
break;
case 'h':
usage (0);
break;
case 'V':
printf ("grub-setup (%s) %s\n", PACKAGE_NAME, PACKAGE_VERSION);
return 0;
case 'v':
verbosity++;
break;
default:
usage (1);
break;
}
}
if (verbosity > 1)
grub_env_set ("debug", "all");
if (optind >= argc)
{
fprintf (stderr, "No device is specified.\n");
usage (1);
}
if (optind + 1 != argc)
{
fprintf (stderr, "Unknown extra argument `%s'.\n", argv[optind + 1]);
usage (1);
}
return 1;
}
static char *
get_device_name (char *dev)
{
size_t len = strlen (dev);
if (dev[0] != '(' || dev[len - 1] != ')')
return 0;
dev[len - 1] = '\0';
return dev + 1;
}
static void
find_dest_dev (struct grub_setup_info *gp, char *argv[])
{
gp->dest_dev = get_device_name (argv[optind]);
if (! gp->dest_dev)
{
/* Possibly, the user specified an OS device file. */
gp->dest_dev = grub_util_get_grub_dev (argv[optind]);
if (! gp->dest_dev)
{
fprintf (stderr, "Invalid device `%s'.\n", argv[optind]);
usage (1);
}
grub_util_info ("transformed OS device `%s' into GRUB device `%s'",
argv[optind], gp->dest_dev);
}
else
{
/* For simplicity. */
gp->dest_dev = xstrdup (gp->dest_dev);
grub_util_info ("Using `%s' as GRUB device", gp->dest_dev);
}
}
static void
check_root_dev (struct grub_setup_info *gp)
{
if (gp->root_dev)
{
char *tmp = get_device_name (gp->root_dev);
if (! tmp)
grub_util_error ("invalid root device `%s'", gp->root_dev);
tmp = xstrdup (tmp);
free (gp->root_dev);
gp->root_dev = tmp;
}
else
{
char *dir = gp->dir ? gp->dir : DEFAULT_DIRECTORY;
char *root_device = grub_guess_root_device (dir);
gp->root_dev = grub_util_get_grub_dev (root_device);
if (! gp->root_dev)
{
grub_util_info ("guessing the root device failed, because of `%s'",
grub_errmsg);
grub_util_error ("cannot guess the root device. "
"Specify the option `--root-device'");
}
grub_util_info ("guessed root device `%s' and root_dev `%s' from "
"dir `%s'", root_device, gp->root_dev, dir);
}
}
static void
free_memory (struct grub_setup_info *gp)
{
free (gp->boot_file);
free (gp->core_file);
free (gp->dir);
free (gp->dev_map);
free (gp->root_dev);
free (gp->prefix);
free (gp->dest_dev);
}
int
main (int argc, char *argv[])
{
struct grub_setup_info ginfo;
set_program_name (argv[0]);
grub_util_init_nls ();
init_info (&ginfo);
if (!parse_options (&ginfo, argc, argv))
return 0;
/* Initialize the emulated biosdisk driver. */
grub_util_biosdisk_init (ginfo.dev_map ? ginfo.dev_map : DEFAULT_DEVICE_MAP);
/* Initialize all modules. */
grub_init_all ();
find_dest_dev (&ginfo, argv);
ginfo.prefix = grub_make_system_path_relative_to_its_root (ginfo.dir ?
: DEFAULT_DIRECTORY);
check_root_dev (&ginfo);
/* Do the real work. */
setup (ginfo.prefix,
ginfo.dir ? ginfo.dir : DEFAULT_DIRECTORY,
ginfo.boot_file ? ginfo.boot_file : DEFAULT_BOOT_FILE,
ginfo.core_file ? ginfo.core_file : DEFAULT_CORE_FILE,
ginfo.root_dev, ginfo.dest_dev);
/* Free resources. */
grub_fini_all ();
free_memory (&ginfo);
return 0;
}
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