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grub/grub-core/loader/i386/pc/plan9.c
Vladimir 'phcoder' Serbinenko 64c8b8f64c * grub-core/loader/i386/pc/plan9.c (grub_cmd_plan9): Remove PXE 
handling.
	* include/grub/disk.h (grub_disk_dev_id): Remove obsolete
	GRUB_DISK_DEVICE_UUID_ID, GRUB_DISK_DEVICE_PXE_ID and
	GRUB_DISK_DEVICE_FILE_ID.
2012-01-29 16:34:39 +01:00

514 lines
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 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 <grub/loader.h>
#include <grub/file.h>
#include <grub/err.h>
#include <grub/device.h>
#include <grub/disk.h>
#include <grub/misc.h>
#include <grub/types.h>
#include <grub/partition.h>
#include <grub/msdos_partition.h>
#include <grub/scsi.h>
#include <grub/dl.h>
#include <grub/command.h>
#include <grub/i18n.h>
#include <grub/video.h>
#include <grub/mm.h>
#include <grub/cpu/relocator.h>
#include <grub/extcmd.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_dl_t my_mod;
static struct grub_relocator *rel;
static grub_uint32_t eip = 0xffffffff;
#define GRUB_PLAN9_TARGET 0x100000
#define GRUB_PLAN9_ALIGN 4096
#define GRUB_PLAN9_CONFIG_ADDR 0x001200
#define GRUB_PLAN9_CONFIG_PATH_SIZE 0x000040
#define GRUB_PLAN9_CONFIG_MAGIC "ZORT 0\r\n"
static const struct grub_arg_option options[] =
{
{"map", 'm', GRUB_ARG_OPTION_REPEATABLE,
N_("Override guessed mapping of Plan9 devices."),
N_("GRUBDEVICE=PLAN9DEVICE"),
ARG_TYPE_STRING},
{0, 0, 0, 0, 0, 0}
};
struct grub_plan9_header
{
grub_uint32_t magic;
#define GRUB_PLAN9_MAGIC 0x1eb
grub_uint32_t text_size;
grub_uint32_t data_size;
grub_uint32_t bss_size;
grub_uint32_t sectiona;
grub_uint32_t entry_addr;
grub_uint32_t zero;
grub_uint32_t sectionb;
};
static grub_err_t
grub_plan9_boot (void)
{
struct grub_relocator32_state state = {
.eax = 0,
.eip = eip,
.ebx = 0,
.ecx = 0,
.edx = 0,
.edi = 0,
.esp = 0,
.ebp = 0,
.esi = 0
};
grub_video_set_mode ("text", 0, 0);
return grub_relocator32_boot (rel, state);
}
static grub_err_t
grub_plan9_unload (void)
{
grub_relocator_unload (rel);
rel = NULL;
grub_dl_unref (my_mod);
return GRUB_ERR_NONE;
}
static grub_err_t
grub_cmd_plan9 (grub_extcmd_context_t ctxt, int argc, char *argv[])
{
grub_file_t file = 0;
void *mem;
grub_size_t memsize, padsize;
struct grub_plan9_header hdr;
char *config, *configptr;
grub_size_t configsize;
char *pmap = NULL;
grub_size_t pmapalloc = 256;
grub_size_t pmapptr = 0;
int noslash = 1;
char prefixes[5][10] = {"dos", "plan9", "ntfs", "linux", "linuxswap"};
int prefixescnt[5];
char *bootdisk = NULL, *bootpart = NULL, *bootpath = NULL;
auto int fill_partition (grub_disk_t disk,
const grub_partition_t partition);
int fill_partition (grub_disk_t disk,
const grub_partition_t partition)
{
int file_disk = 0;
int pstart, pend;
if (!noslash)
{
if (grub_extend_alloc (pmapptr + 1, &pmapalloc, (void **) &pmap))
return 1;
pmap[pmapptr++] = '/';
}
noslash = 0;
file_disk = file->device->disk && disk->id == file->device->disk->id
&& disk->dev->id == file->device->disk->dev->id;
pstart = pmapptr;
if (grub_strcmp (partition->partmap->name, "plan") == 0)
{
unsigned ptr = partition->index + sizeof ("part ") - 1;
grub_err_t err;
disk->partition = partition->parent;
do
{
if (grub_extend_alloc (pmapptr + 1, &pmapalloc, (void **) &pmap))
return 1;
err = grub_disk_read (disk, 1, ptr, 1, pmap + pmapptr);
if (err)
{
disk->partition = 0;
return err;
}
ptr++;
pmapptr++;
}
while (grub_isalpha (pmap[pmapptr - 1])
|| grub_isdigit (pmap[pmapptr - 1]));
pmapptr--;
}
else
{
char name[50];
int c = 0;
if (grub_strcmp (partition->partmap->name, "msdos") == 0)
{
switch (partition->msdostype)
{
case GRUB_PC_PARTITION_TYPE_PLAN9:
c = 1;
break;
case GRUB_PC_PARTITION_TYPE_NTFS:
c = 2;
break;
case GRUB_PC_PARTITION_TYPE_MINIX:
case GRUB_PC_PARTITION_TYPE_LINUX_MINIX:
case GRUB_PC_PARTITION_TYPE_EXT2FS:
c = 3;
break;
case GRUB_PC_PARTITION_TYPE_LINUX_SWAP:
c = 4;
break;
}
}
if (prefixescnt[c] == 0)
grub_strcpy (name, prefixes[c]);
else
grub_snprintf (name, sizeof (name), "%s.%d", prefixes[c],
prefixescnt[c]);
prefixescnt[c]++;
if (grub_extend_alloc (pmapptr + grub_strlen (name) + 1,
&pmapalloc, (void **) &pmap))
return 1;
grub_strcpy (pmap + pmapptr, name);
pmapptr += grub_strlen (name);
}
pend = pmapptr;
if (grub_extend_alloc (pmapptr + 2 + 25 + 5 + 25, &pmapalloc,
(void **) &pmap))
return 1;
pmap[pmapptr++] = ' ';
grub_snprintf (pmap + pmapptr, 25 + 5 + 25,
"%" PRIuGRUB_UINT64_T " %" PRIuGRUB_UINT64_T,
grub_partition_get_start (partition),
grub_partition_get_start (partition)
+ grub_partition_get_len (partition));
if (file_disk && grub_partition_get_start (partition)
== grub_partition_get_start (file->device->disk->partition)
&& grub_partition_get_len (partition)
== grub_partition_get_len (file->device->disk->partition))
{
grub_free (bootpart);
bootpart = grub_strndup (pmap + pstart, pend - pstart);
}
pmapptr += grub_strlen (pmap + pmapptr);
return 0;
}
auto int fill_disk (const char *name);
int fill_disk (const char *name)
{
grub_device_t dev;
char *plan9name = NULL;
unsigned i;
int file_disk = 0;
dev = grub_device_open (name);
if (!dev)
{
grub_print_error ();
return 0;
}
if (!dev->disk)
{
grub_device_close (dev);
return 0;
}
file_disk = file->device->disk && dev->disk->id == file->device->disk->id
&& dev->disk->dev->id == file->device->disk->dev->id;
for (i = 0; ctxt->state[0].args && ctxt->state[0].args[i]; i++)
if (grub_strncmp (name, ctxt->state[0].args[i], grub_strlen (name)) == 0
&& ctxt->state[0].args[i][grub_strlen (name)] == '=')
break;
if (ctxt->state[0].args && ctxt->state[0].args[i])
plan9name = grub_strdup (ctxt->state[0].args[i] + grub_strlen (name) + 1);
else
switch (dev->disk->dev->id)
{
case GRUB_DISK_DEVICE_BIOSDISK_ID:
if (dev->disk->id & 0x80)
plan9name = grub_xasprintf ("sdB%u",
(unsigned) (dev->disk->id & 0x7f));
else
plan9name = grub_xasprintf ("fd%u",
(unsigned) (dev->disk->id & 0x7f));
break;
/* Shouldn't happen as Plan9 doesn't work on these platforms. */
case GRUB_DISK_DEVICE_OFDISK_ID:
case GRUB_DISK_DEVICE_EFIDISK_ID:
/* Plan9 doesn't see those. */
default:
/* Not sure how to handle those. */
case GRUB_DISK_DEVICE_NAND_ID:
if (!file_disk)
{
grub_device_close (dev);
return 0;
}
/* if it's the disk the kernel is loaded from we need to name
it nevertheless. */
plan9name = grub_strdup ("sdZ0");
break;
case GRUB_DISK_DEVICE_ATA_ID:
{
int unit;
if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
unit = 0;
else
unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1, 0, 0);
plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
}
break;
case GRUB_DISK_DEVICE_SCSI_ID:
if (((dev->disk->id >> GRUB_SCSI_ID_SUBSYSTEM_SHIFT) & 0xff)
== GRUB_SCSI_SUBSYSTEM_PATA)
{
int unit;
if (grub_strlen (dev->disk->name) < sizeof ("ata0") - 1)
unit = 0;
else
unit = grub_strtoul (dev->disk->name + sizeof ("ata0") - 1,
0, 0);
plan9name = grub_xasprintf ("sd%c%d", 'C' + unit / 2, unit % 2);
break;
}
/* FIXME: how does Plan9 number controllers?
We probably need save the SCSI devices and sort them */
plan9name
= grub_xasprintf ("sd0%u", (unsigned)
((dev->disk->id >> GRUB_SCSI_ID_BUS_SHIFT)
& 0xf));
break;
}
if (!plan9name)
{
grub_print_error ();
return 0;
}
if (grub_extend_alloc (pmapptr + grub_strlen (plan9name)
+ sizeof ("part="), &pmapalloc,
(void **) &pmap))
{
grub_free (plan9name);
return 1;
}
grub_strcpy (pmap + pmapptr, plan9name);
pmapptr += grub_strlen (plan9name);
if (!file_disk)
grub_free (plan9name);
else
{
grub_free (bootdisk);
bootdisk = plan9name;
}
grub_strcpy (pmap + pmapptr, "part=");
pmapptr += sizeof ("part=") - 1;
noslash = 1;
grub_memset (prefixescnt, 0, sizeof (prefixescnt));
if (grub_partition_iterate (dev->disk, fill_partition))
return 1;
if (grub_extend_alloc (pmapptr + 1, &pmapalloc, (void **) &pmap))
return 1;
pmap[pmapptr++] = '\n';
return 0;
}
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "no file specified");
grub_dl_ref (my_mod);
rel = grub_relocator_new ();
if (!rel)
goto fail;
file = grub_file_open (argv[0]);
if (! file)
goto fail;
pmap = grub_malloc (pmapalloc);
if (!pmap)
goto fail;
if (grub_disk_dev_iterate (fill_disk))
goto fail;
if (grub_extend_alloc (pmapptr + 1, &pmapalloc,
(void **) &pmap))
goto fail;
pmap[pmapptr] = 0;
{
char *file_name = grub_strchr (argv[0], ')');
if (file_name)
file_name++;
else
file_name = argv[0];
if (*file_name)
file_name++;
if (bootpart)
bootpath = grub_xasprintf ("%s!%s!%s", bootdisk, bootpart, file_name);
else
bootpath = grub_xasprintf ("%s!%s", bootdisk, file_name);
grub_free (bootdisk);
grub_free (bootpart);
}
if (!bootpath)
goto fail;
if (grub_file_read (file, &hdr, sizeof (hdr)) != (grub_ssize_t) sizeof (hdr))
goto fail;
if (grub_be_to_cpu32 (hdr.magic) != GRUB_PLAN9_MAGIC
|| hdr.zero)
{
grub_error (GRUB_ERR_BAD_OS, "unsupported Plan9");
goto fail;
}
memsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size) + sizeof (hdr),
GRUB_PLAN9_ALIGN);
memsize += ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), GRUB_PLAN9_ALIGN);
memsize += ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size), GRUB_PLAN9_ALIGN);
eip = grub_be_to_cpu32 (hdr.entry_addr) & 0xfffffff;
/* path */
configsize = GRUB_PLAN9_CONFIG_PATH_SIZE;
/* magic */
configsize += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
{
int i;
for (i = 1; i < argc; i++)
configsize += grub_strlen (argv[i]) + 1;
}
configsize += (sizeof ("bootfile=") - 1) + grub_strlen (bootpath) + 1;
configsize += pmapptr;
/* Terminating \0. */
configsize++;
{
grub_relocator_chunk_t ch;
grub_err_t err;
err = grub_relocator_alloc_chunk_addr (rel, &ch, GRUB_PLAN9_CONFIG_ADDR,
configsize);
if (err)
goto fail;
config = get_virtual_current_address (ch);
}
grub_memset (config, 0, GRUB_PLAN9_CONFIG_PATH_SIZE);
grub_strncpy (config, bootpath, GRUB_PLAN9_CONFIG_PATH_SIZE - 1);
configptr = config + GRUB_PLAN9_CONFIG_PATH_SIZE;
grub_memcpy (configptr, GRUB_PLAN9_CONFIG_MAGIC,
sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1);
configptr += sizeof (GRUB_PLAN9_CONFIG_MAGIC) - 1;
configptr = grub_stpcpy (configptr, "bootfile=");
configptr = grub_stpcpy (configptr, bootpath);
*configptr++ = '\n';
{
int i;
for (i = 1; i < argc; i++)
{
configptr = grub_stpcpy (configptr, argv[i]);
*configptr++ = '\n';
}
}
configptr = grub_stpcpy (configptr, pmap);
{
grub_relocator_chunk_t ch;
grub_err_t err;
err = grub_relocator_alloc_chunk_addr (rel, &ch, GRUB_PLAN9_TARGET,
memsize);
if (err)
goto fail;
mem = get_virtual_current_address (ch);
}
{
grub_uint8_t *ptr;
ptr = mem;
grub_memcpy (ptr, &hdr, sizeof (hdr));
ptr += sizeof (hdr);
if (grub_file_read (file, ptr, grub_be_to_cpu32 (hdr.text_size))
!= (grub_ssize_t) grub_be_to_cpu32 (hdr.text_size))
goto fail;
ptr += grub_be_to_cpu32 (hdr.text_size);
padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.text_size) + sizeof (hdr),
GRUB_PLAN9_ALIGN) - grub_be_to_cpu32 (hdr.text_size)
- sizeof (hdr);
grub_memset (ptr, 0, padsize);
ptr += padsize;
if (grub_file_read (file, ptr, grub_be_to_cpu32 (hdr.data_size))
!= (grub_ssize_t) grub_be_to_cpu32 (hdr.data_size))
goto fail;
ptr += grub_be_to_cpu32 (hdr.data_size);
padsize = ALIGN_UP (grub_be_to_cpu32 (hdr.data_size), GRUB_PLAN9_ALIGN)
- grub_be_to_cpu32 (hdr.data_size);
grub_memset (ptr, 0, padsize);
ptr += padsize;
grub_memset (ptr, 0, ALIGN_UP(grub_be_to_cpu32 (hdr.bss_size),
GRUB_PLAN9_ALIGN));
}
grub_loader_set (grub_plan9_boot, grub_plan9_unload, 1);
return GRUB_ERR_NONE;
fail:
grub_free (pmap);
if (file)
grub_file_close (file);
grub_plan9_unload ();
return grub_errno;
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(plan9)
{
cmd = grub_register_extcmd ("plan9", grub_cmd_plan9,
GRUB_COMMAND_OPTIONS_AT_START,
N_("KERNEL ARGS"), N_("Load Plan9 kernel."),
options);
my_mod = mod;
}
GRUB_MOD_FINI(plan9)
{
grub_unregister_extcmd (cmd);
}
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