#include <grub/err.h>
#include <grub/dl.h>
#include <grub/charset.h>
+#include <grub/fat.h>
#define GRUB_FAT_DIR_ENTRY_SIZE 32
| GRUB_FAT_ATTR_ARCHIVE \
| GRUB_FAT_ATTR_VOLUME_ID)
-struct grub_fat_bpb
-{
- grub_uint8_t jmp_boot[3];
- grub_uint8_t oem_name[8];
- grub_uint16_t bytes_per_sector;
- grub_uint8_t sectors_per_cluster;
- grub_uint16_t num_reserved_sectors;
- grub_uint8_t num_fats;
- grub_uint16_t num_root_entries;
- grub_uint16_t num_total_sectors_16;
- grub_uint8_t media;
- grub_uint16_t sectors_per_fat_16;
- grub_uint16_t sectors_per_track;
- grub_uint16_t num_heads;
- grub_uint32_t num_hidden_sectors;
- grub_uint32_t num_total_sectors_32;
- union
- {
- struct
- {
- grub_uint8_t num_ph_drive;
- grub_uint8_t reserved;
- grub_uint8_t boot_sig;
- grub_uint32_t num_serial;
- grub_uint8_t label[11];
- grub_uint8_t fstype[8];
- } __attribute__ ((packed)) fat12_or_fat16;
- struct
- {
- grub_uint32_t sectors_per_fat_32;
- grub_uint16_t extended_flags;
- grub_uint16_t fs_version;
- grub_uint32_t root_cluster;
- grub_uint16_t fs_info;
- grub_uint16_t backup_boot_sector;
- grub_uint8_t reserved[12];
- grub_uint8_t num_ph_drive;
- grub_uint8_t reserved1;
- grub_uint8_t boot_sig;
- grub_uint32_t num_serial;
- grub_uint8_t label[11];
- grub_uint8_t fstype[8];
- } __attribute__ ((packed)) fat32;
- } __attribute__ ((packed)) version_specific;
-} __attribute__ ((packed));
-
struct grub_fat_dir_entry
{
grub_uint8_t name[11];
#include <grub/i18n.h>
#include <grub/video.h>
#include <grub/mm.h>
+#include <grub/fat.h>
+#include <grub/ntfs.h>
static grub_dl_t my_mod;
static int boot_drive;
static void *boot_part_addr;
+typedef enum
+ {
+ GRUB_CHAINLOADER_FORCE = 0x1,
+ GRUB_CHAINLOADER_BPB = 0x2,
+ } grub_chainloader_flags_t;
+
static grub_err_t
grub_chainloader_boot (void)
{
return GRUB_ERR_NONE;
}
+void
+grub_chainloader_patch_bpb (void *bs, grub_device_t dev, grub_uint8_t dl)
+{
+ grub_uint32_t part_start = 0;
+ if (dev && dev->disk)
+ part_start = grub_partition_get_start (dev->disk->partition);
+ if (grub_memcmp ((char *) &((struct grub_ntfs_bpb *) bs)->oem_name,
+ "NTFS", 4) == 0)
+ {
+ struct grub_ntfs_bpb *bpb = (struct grub_ntfs_bpb *) bs;
+ bpb->num_hidden_sectors = grub_cpu_to_le32 (part_start);
+ bpb->bios_drive = dl;
+ return;
+ }
+
+ do
+ {
+ struct grub_fat_bpb *bpb = (struct grub_fat_bpb *) bs;
+ if (grub_strncmp((const char *) bpb->version_specific.fat12_or_fat16.fstype, "FAT12", 5)
+ && grub_strncmp((const char *) bpb->version_specific.fat12_or_fat16.fstype, "FAT16", 5)
+ && grub_strncmp((const char *) bpb->version_specific.fat32.fstype, "FAT32", 5))
+ break;
+
+ if (grub_le_to_cpu16 (bpb->bytes_per_sector) < 512
+ || (grub_le_to_cpu16 (bpb->bytes_per_sector)
+ & (grub_le_to_cpu16 (bpb->bytes_per_sector) - 1)))
+ break;
+
+ if (bpb->sectors_per_cluster == 0
+ || (bpb->sectors_per_cluster & (bpb->sectors_per_cluster - 1)))
+ break;
+
+ if (bpb->num_reserved_sectors == 0)
+ break;
+ if (bpb->num_total_sectors_16 == 0 || bpb->num_total_sectors_32 == 0)
+ break;
+
+ if (bpb->num_fats == 0)
+ break;
+
+ if (bpb->sectors_per_fat_16)
+ {
+ bpb->num_hidden_sectors = grub_cpu_to_le32 (part_start);
+ bpb->version_specific.fat12_or_fat16.num_ph_drive = dl;
+ return;
+ }
+ if (bpb->version_specific.fat32.sectors_per_fat_32)
+ {
+ bpb->num_hidden_sectors = grub_cpu_to_le32 (part_start);
+ bpb->version_specific.fat32.num_ph_drive = dl;
+ return;
+ }
+ break;
+ }
+ while (0);
+}
+
static void
grub_chainloader_cmd (const char *filename, grub_chainloader_flags_t flags)
{
}
}
+ if (flags & GRUB_CHAINLOADER_BPB)
+ grub_chainloader_patch_bpb ((void *) 0x7C00, dev, drive);
+
if (dev)
grub_device_close (dev);
{
grub_chainloader_flags_t flags = 0;
- if (argc > 0 && grub_strcmp (argv[0], "--force") == 0)
+ while (argc > 0)
{
- flags |= GRUB_CHAINLOADER_FORCE;
- argc--;
- argv++;
+ if (grub_strcmp (argv[0], "--force") == 0)
+ {
+ flags |= GRUB_CHAINLOADER_FORCE;
+ argc--;
+ argv++;
+ continue;
+ }
+ if (grub_strcmp (argv[0], "--bpb") == 0)
+ {
+ flags |= GRUB_CHAINLOADER_BPB;
+ argc--;
+ argv++;
+ continue;
+ }
+ break;
}
if (argc == 0)
GRUB_MOD_INIT(chainloader)
{
cmd = grub_register_command ("chainloader", grub_cmd_chainloader,
- 0, N_("Load another boot loader."));
+ "[--force|--bpb] FILE",
+ N_("Load another boot loader."));
my_mod = mod;
}
#include <grub/video.h>
#include <grub/mm.h>
#include <grub/cpu/relocator.h>
+#include <grub/machine/chainloader.h>
static grub_dl_t my_mod;
static struct grub_relocator *rel;
grub_device_close (dev);
goto fail;
}
+ grub_chainloader_patch_bpb (bs, dev, edx);
}
if (dev)
/* Set default color names. */
grub_env_set ("color_normal", "white/black");
grub_env_set ("color_highlight", "black/white");
+
+ grub_env_set ("grub_feature_chainloader_bpb", "--bpb");
+ grub_env_export ("grub_feature_chainloader_bpb");
}
GRUB_MOD_FINI(normal)
#include <grub/dl.h>
-/* Common function for normal and rescue mode commands. */
-typedef enum
- {
- GRUB_CHAINLOADER_FORCE = 0x1
- } grub_chainloader_flags_t;
+void
+grub_chainloader_patch_bpb (void *bs, grub_device_t dev, grub_uint8_t dl);
#endif /* GRUB_CHAINLOADER_MACHINE_HEADER */
grub_uint16_t sectors_per_track;
grub_uint16_t num_heads;
grub_uint32_t num_hidden_sectors;
- grub_uint32_t reserved_3[2];
+ grub_uint32_t reserved_3;
+ grub_uint8_t bios_drive;
+ grub_uint8_t reserved_4[3];
grub_uint64_t num_total_sectors;
grub_uint64_t mft_lcn;
grub_uint64_t mft_mirr_lcn;
grub_int8_t clusters_per_mft;
- grub_int8_t reserved_4[3];
- grub_int8_t clusters_per_index;
grub_int8_t reserved_5[3];
+ grub_int8_t clusters_per_index;
+ grub_int8_t reserved_6[3];
grub_uint64_t num_serial;
grub_uint32_t checksum;
} __attribute__ ((packed));