* kern/i386/loader.S: New file.
* kern/i386/pc/startup.S (grub_linux_prot_size): Moved from here ...
* kern/i386/loader.S (grub_linux_prot_size)... to here.
* kern/i386/pc/startup.S (grub_linux_tmp_addr): Moved from here ...
* kern/i386/loader.S (grub_linux_tmp_addr)... to here.
* kern/i386/pc/startup.S (grub_linux_real_addr): Moved from here ...
* kern/i386/loader.S (grub_linux_real_addr)... to here.
* kern/i386/pc/startup.S (grub_linux_boot_zimage): Moved from here ...
* kern/i386/loader.S (grub_linux_boot_zimage)... to here.
* kern/i386/pc/startup.S (grub_linux_boot_bzimage): Moved from here ...
* kern/i386/loader.S (grub_linux_boot_bzimage)... to here.
* kern/i386/pc/startup.S (grub_multiboot_real_boot): Moved from here ...
* kern/i386/loader.S (grub_multiboot_real_boot)... to here.
* kern/i386/pc/startup.S (grub_multiboot2_real_boot): Moved from here ...
* kern/i386/loader.S (grub_multiboot2_real_boot)... to here.
* kern/i386/realmode.S: New file.
* kern/i386/pc/startup.S (protstack): Moved from here ...
* kern/i386/realmode.S (protstack)... to here.
* kern/i386/pc/startup.S (gdt): Moved from here ...
* kern/i386/realmode.S (gdt)... to here.
* kern/i386/pc/startup.S (prot_to_real): Moved from here ...
* kern/i386/realmode.S (prot_to_real)... to here.
* kern/i386/pc/startup.S: Include `kern/i386/loader.S' and
`kern/i386/realmode.S'.
* kern/powerpc/ieee1275/init.c: Rename HEAP_LIMIT to HEAP_MAX_ADDR,
and make it easier to figure out.
Add HEAP_MIN_SIZE and HEAP_MAX_ADDR definitions.
(grub_claim_heap): Use HEAP_MAX_ADDR rather than taking a parameter.
Do not avoid claiming a region above HEAP_MAX_ADDR if that would
leave us with less than HEAP_MIN_SIZE total heap.
Avoid our total amount of heap to surpass HEAP_MAX_SIZE.
* kern/powerpc/ieee1275/cmain.c (grub_ieee1275_test_flag): Detect
SmartFirmware version updates (as released by Sven Luther), and avoid
setting GRUB_IEEE1275_FLAG_NO_PARTITION_0 or
GRUB_IEEE1275_FLAG_0_BASED_PARTITIONS unless the running version is
known broken.
for powerpc & i386-pc. This patch was more so started by Hollis
Blanchard getting multiboot 2 working for powerpc and I added to it
and cleaned it up.
One of the ideas with this patch is to keep everything under one
command for the user. So instead of having a "multiboot2" & "module2"
command, I created a proxy like mechanism so that you have only one
command for both multiboot 1 & 2 ... "multiboot". This is where
"loader/multiboot_loader.c" comes from. I could have integrated things
more but I figure the current approach will less likely break
anything.
So if your OS is multiboot 2 capable, the user would do the following
to load it up from a grub prompt:
grub> multiboot <location of kernel> <kernel args>
grub> module <some image> <multiboot tag> <image arguments>
grub> module <isome mage> <multiboot tag> <image arguments>
grub .....
The other thing that this patch does is it begins to make the
multiboot 1 code a bit more architecture agnostic so IF someone wanted
to implement it on another architecture they can.
A bit of file moving around and definition renaming is also apart of
this patch. I have also taken the time to make sure that it does not
break multiboot 1 loading on i386-pc. But mulitboot 2 may still need a
little more testing and work for i386-pc. Powerpc multiboot 2 has been
heavily tested and does work.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): Add
GRUB_IEEE1275_FLAG_BROKEN_OUTPUT flag.
* kern/powerpc/ieee1275/cmain.c (grub_ieee1275_find_options): Set this
flag when running on SmartFirmware.
* term/ieee1275/ofconsole.c (grub_ofconsole_init): Avoid running
"output-device output" command when GRUB_IEEE1275_FLAG_BROKEN_OUTPUT
was set.
* kern/powerpc/ieee1275/openfw.c (grub_ieee1275_encode_devname):
Increase partno when GRUB_IEEE1275_FLAG_0_BASED_PARTITIONS flag is set,
rather than decreasing it.
* util/i386/pc/grub-setup.c (setup): When embedding is required, but
there's not enough space to do it, fail in the same way as when it
can't be done because there are no partitions.
* util/powerpc/ieee1275/grub-install.in: Improve error message shown
when nvsetenv failed.
* include/grub/i386/pc/kernel.h: Define GRUB_KERNEL_MACHINE_DATA_END to
indicate end of data section in kernel image.
* include/grub/i386/efi/kernel.h: Define GRUB_KERNEL_MACHINE_PREFIX and
GRUB_KERNEL_MACHINE_DATA_END.
* kern/i386/pc/startup.S: Do not initialize grub_prefix, only reserve
space for it.
* kern/i386/efi/startup.S: Likewise.
* util/i386/pc/grub-mkimage.c: Initialize grub_prefix to /boot/grub
during image generation. Implement --prefix option to override this
patch.
* util/i386/efi/grub-mkimage.c: Likewise.
* util/update-grub_lib.in (convert_system_path_to_grub_path): Split
code to make path relative to its root into a separate function.
* util/i386/pc/grub-install.in: Use newly provided
make_system_path_relative_to_its_root() to convert ${grubdir}, then
pass the result to grub-install --prefix.
* util/biosdisk.c (linux_find_partition): Allocate real_dev on the
stack instead of on the heap.
* kern/disk.c (grub_disk_read): Make sure tmp_buf is big enough
before doing a read on it.
* configure.ac: Only use -fno-stack-protector for the target
environment.
* conf/powerpc-ieee1275.rmk (kernel_elf_LDFLAGS): Link at 64KB.
* kern/powerpc/ieee1275/init.c (_end): Add declaration.
(_start): Likewise.
(grub_arch_modules_addr): Return address after `_end'.
* util/powerpc/ieee1275/grub-mkimage.c: Include grub/misc.h.
(load_modules): Use new parameter as `p_paddr' and `p_vaddr'.
(add_segments): Calculate `_end' from phdr size and location.
(ALIGN_UP): Moved to ...
* include/grub/misc.h: here.
* include/grub/powerpc/ieee1275/kernel.h (GRUB_IEEE1275_MOD_ALIGN):
New macro.
(GRUB_IEEE1275_MODULE_BASE): Removed.
* include/grub/err.h (grub_err_t): Add `GRUB_ERR_MENU'.
* kern/env.c (grub_env_unset): Don't free the member `value' when
the type is GRUB_ENV_VAR_DATA, in this case it's a user defined
pointer.
* normal/main.c (current_menu): Removed.
(free_menu): Unset the `menu' environment variable.
(grub_normal_menu_addentry): Make use of the environment variable
`menu', instead of using the global `current_menu'. Allocate
memory for the sourcecode of this entry.
(read_config_file): New argument `nested', changed all callers.
Only in the case of a new context, initialize a new menu. Set the
`menu' environment variable.
(grub_normal_execute): Don't set and unset the environment
variable `menu' here anymore. Only free the menu when leaving the
context.
* util/i386/pc/biosdisk.c (linux_find_partition): Fixed a memory
leak.
* kern/disk.c (grub_disk_read): When there is a read error, always
try to read only the necessary data.
* conf/i386-pc.rmk (grub_probe_SOURCES): Add disk/lvm.c and
disk/raid.c.
* include/grub/disk.h [GRUB_UTIL] (grub_raid_init): New
prototype.
[GRUB_UTIL] (grub_raid_fini): Likewise.
[GRUB_UTIL] (grub_lvm_init): Likewise.
[GRUB_UTIL] (grub_lvm_fini): Likewise.
* util/i386/pc/grub-probe.c (probe): Check whether DEVICE_NAME is
RAID device and copy DEVICE_NAME to DRIVE_NAME in that case.
(main): Call grub_raid_init(), grub_lvm_init(), grub_lvm_fini()
and grub_raid_fini().
* kern/elf.c (grub_elf_file): Call grub_file_seek. Call
grub_error_push and grub_error_pop in the error-handling path.
(grub_elf32_load_segment): Only call grub_file_read with non-zero
length.
* DISTLIST: Added commands/echo.c, disk/lvm.c, disk/raid.c,
include/grub/bitmap.h, include/grub/lvm.h, include/grub/raid.h,
include/grub/i386/pc/vbeutil.h, include/grub/util/lvm.h,
include/grub/util/raid.h, util/lvm.c, util/raid.c, video/bitmap.c,
video/readers/tga.c and video/i386/pc/vbeutil.c.
2006-10-14 Jeroen Dekkers <jeroen@dekkers.cx>
Added support for RAID and LVM.
* disk/lvm.c: New file.
* disk/raid.c: Likewise.
* include/grub/lvm.h: Likewise.
* include/grub/raid.h: Likewise.
* include/grub/util/lvm.h: Likewise.
* include/grub/util/raid.h: Likewise.
* util/lvm.c: Likewise.
* util/raid.c: Likewise.
* include/grub/disk.h (grub_disk_dev_id): Add
GRUB_DISK_DEVICE_RAID_ID and GRUB_DISK_DEVICE_LVM_ID.
(grub_disk_get_size): New prototype.
* kern/disk.c (grub_disk_open): Check whether grub_partition_probe()
returns a partition.
(grub_disk_get_size): New function.
* kern/i386/pc/init.c (make_install_device): Copy the prefix
verbatim if grub_install_dos_part is -2.
* util/i386/pc/getroot.c (grub_guess_root_device): Support RAID
and LVM devices.
* util/i386/pc/grub-setup.c (setup): New argument
MUST_EMBED. Force embedding of GRUB when the argument is
true. Close FILE before returning.
(main): Add support for RAID and LVM.
* conf/common.rmk: Add RAID and LVM modules.
* conf/i386-pc.rmk (grub_setup_SOURCES): Add util/raid.c and
util/lvm.c.
(grub_emu_SOURCES): Add disk/raid.c and disk/lvm.c.
* kern/misc.c (grub_strstr): New function.
* include/grub/misc.h (grub_strstr): New prototype.
* include/grub/powerpc/libgcc.h (__floatdisf): New prototype.
(__cmpdi): Likewise.
* kern/powerpc/ieee1275/openfw.c (grub_devalias_iterate): Pass 0 as
`flags' to `grub_ieee1275_next_property'. Change `pathlen' to type
`grub_ssize_t'.
* kern/powerpc/ieee1275/cmain.c: include grub/misc.h.
* loader/powerpc/ieee1275/linux.c (grub_linux_boot): Change `actual'
to type `grub_ssize_t'.
(grub_rescue_cmd_linux): Cast -1 to `grub_off_t'.
Count partitions from 1 instead of 0 in the string representation
of partitions. Still use 0-based internally.
* partmap/sun.c (grub_sun_is_valid): A cosmetic change.
(sun_partition_map_iterate): Use grub_partition_t instead of
struct grub_partition *. Cast DESC->START_CYLINDER to
grub_uint64_t after converting the endian.
(sun_partition_map_probe): Subtract 1 for PARTNUM.
(sun_partition_map_get_name): Add 1 to P->INDEX.
* partmap/pc.c (grub_partition_parse): Subtract 1 for
PCDATA->DOS_PART.
(pc_partition_map_get_name): Add 1 into PCDATA->DOS_PART.
* partmap/gpt.c (gpt_partition_map_iterate): Initialize PARTNO to
zero instead of one.
(gpt_partition_map_probe): Subtract 1 for PARTNUM.
(gpt_partition_map_get_name): Add 1 into P->INDEX.
* partmap/apple.c (apple_partition_map_iterate): Change the type
of POS to unsigned.
(apple_partition_map_probe): Subtract 1 for PARTNUM.
(apple_partition_map_get_name): Add 1 into P->INDEX.
* partmap/amiga.c (amiga_partition_map_iterate): Change the type
of POS to unsigned.
(amiga_partition_map_iterate): Cast NEXT to grub_off_t to
calculate the offset of a partition.
(amiga_partition_map_probe): Subtract 1 for PARTNUM.
(amiga_partition_map_get_name): Add 1 into P->INDEX.
* partmap/acorn.c (acorn_partition_map_find): Change the type of
SECTOR to grub_disk_addr_t.
(acorn_partition_map_iterate): Likewise.
(acorn_partition_map_probe): Subtract 1 for PARTNUM.
Change the type of SECTOR to grub_disk_addr_t. Declare P on the
top.
(acorn_partition_map_get_name): Add 1 into P->INDEX.
* kern/i386/pc/init.c (make_install_device): Add 1 into
GRUB_INSTALL_DOS_PART.
* fs/iso9660.c (grub_iso9660_mount): Fixed a reversed
conditional.
Clean up the code to support 64-bit addressing in disks and
files. This change is not enough for filesystems yet.
* util/i386/pc/grub-setup.c (struct boot_blocklist): Change the
type of "start" to grub_uint64_t.
(setup): Change the types of KERNEL_SECTOR and FIRST_SECTOR to
grub_disk_addr_t * and grub_disk_addr_t. Fix the format string in
save_first_sector and save_blocklists. Use grub_le_to_cpu64 to
convert addresses.
* util/i386/pc/biosdisk.c (open_device): Change the type of SECTOR
to grub_disk_addr_t.
* partmap/gpt.c (gpt_partition_map_iterate): Fix the format
string.
* partmap/pc.c (pc_partition_map_iterate): Likewise.
* partmap/amiga.c (amiga_partition_map_iterate): Cast RDSK.MAGIC
to char *.
* normal/script.c (grub_script_parse): Remove unused MEMFREE.
* normal/parser.y (YYLTYPE_IS_TRIVIAL): New macro.
* normal/lexer.c (grub_script_yyerror): Specify unused to LEX.
* loader/i386/pc/multiboot.c (grub_multiboot_load_elf64): Cast -1
to grub_off_t, to detect an error from grub_file_seek.
(grub_multiboot_load_elf32): Likewise.
* kern/misc.c (grub_strtoul): Use grub_strtoull. Return the
maximum unsigned long value when an overflow is detected.
(grub_strtoull): New function.
(grub_divmod64): Likewise.
(grub_lltoa): use grub_divmod64.
* kern/fs.c (struct grub_fs_block): Change the type of "offset" to
grub_disk_addr_t.
(grub_fs_blocklist_open): Increase P if P is not NULL to advance
the pointer to next character. Use grub_strtoull instead of
grub_strtoul.
(grub_fs_blocklist_read): Change the types of SECTOR, OFFSET and
SIZE to grub_disk_addr_t, grub_off_t and grub_size_t,
respectively.
* kern/file.c (grub_file_read): Prevent an oveflow of LEN, as the
return value is signed.
(grub_file_seek): Change the type of OLD to grub_off_t. Do not
test if OFFSET is less than zero, as OFFSET is unsigned now.
* kern/disk.c (struct grub_disk_cache): Change the type of
"sector" to grub_disk_addr_t.
(grub_disk_cache_get_index): Change the type of SECTOR to
grub_disk_addr_t. Calculate the hash with SECTOR casted to
unsigned after shifting.
(grub_disk_cache_invalidate): Change the type of SECTOR to
grub_disk_addr_t.
(grub_disk_cache_unlock): Likewise.
(grub_disk_cache_store): Likewise.
(grub_disk_check_range): Change the types of SECTOR, OFFSET, SIZE,
START and LEN to grub_disk_addr_t *, grub_off_t *, grub_size_t,
grub_disk_addr_t and grub_uint64_t, respectively.
(grub_disk_read): Use an unsigned variable REAL_OFFSET for the
body, as the value of OFFSET is tweaked by
grub_disk_check_range. Change the types of START_SECTOR, LEN and
POS to grub_disk_addr_t, grub_size_t and grub_size_t,
respectively.
(grub_disk_write): Use an unsigned variable REAL_OFFSET for the
body, as the value of OFFSET is tweaked by
grub_disk_check_range. Change the types of LEN and N to
grub_size_t.
* io/gzio.c (struct grub_gzio): Change the types of "data_offset"
and "saved_offset" to grub_off_t.
(test_header): Cast BUF to char *.
(get_byte): Cast GZIO->DATA_OFFSET to grub_off_t. Cast GZIO->INBUF
to char *.
(grub_gzio_read): Change the types of OFFSET and SIZE to
grub_off_t and grub_size_t, respectively.
* include/grub/i386/pc/boot.h (GRUB_BOOT_MACHINE_FORCE_LBA):
Removed.
(GRUB_BOOT_MACHINE_BOOT_DRIVE): Changed to 0x4c.
(GRUB_BOOT_MACHINE_KERNEL_ADDRESS): Changed to 0x40.
(GRUB_BOOT_MACHINE_KERNEL_SEGMENT): Changed to 0x42.
(GRUB_BOOT_MACHINE_DRIVE_CHECK): Changed to 0x4e.
(GRUB_BOOT_MACHINE_LIST_SIZE): Increased to 12.
* include/grub/types.h (grub_off_t): Unconditionally set to
grub_uint64_t.
(grub_disk_addr_t): Changed to grub_uint64_t.
* include/grub/partition.h (struct grub_partition): Change the
types of "start", "len" and "offset" to grub_disk_addr_t,
grub_uint64_t and grub_disk_addr_t, respectively.
(grub_partition_get_start): Return grub_disk_addr_t.
(grub_partition_get_len): Return grub_uint64_t.
* include/grub/misc.h (grub_strtoull): New prototype.
(grub_divmod64): Likewise.
* include/grub/fshelp.h (grub_fshelp_read_file): Change the types
of SECTOR, LEN and FILESIZE to grub_disk_addr_t, grub_size_t and
grub_off_t, respectively.
All callers and references changed.
* include/grub/fs.h (struct grub_fs): Change the type of LEN to
grub_size_t in "read".
All callers and references changed.
* include/grub/file.h (struct grub_file): Change the types of
"offset" and "size" to grub_off_t and grub_off_t,
respectively. Change the type of SECTOR to grub_disk_addr_t in
"read_hook".
(grub_file_read): Change the type of LEN to grub_size_t.
(grub_file_seek): Return grub_off_t. Change the type of OFFSET to
grub_off_t.
(grub_file_size): Return grub_off_t.
(grub_file_tell): Likewise.
All callers and references changed.
* include/grub/disk.h (struct grub_disk_dev): Change the types of
SECTOR and SIZE to grub_disk_addr_t and grub_size_t in "read" and
"write".
(struct grub_disk): Change the type of "total_sectors" to
grub_uint64_t. Change the type of SECTOR to grub_disk_addr_t in
"read_hook".
(grub_disk_read): Change the types of SECTOR, OFFSET and SIZE to
grub_disk_addr_t, grub_off_t and grub_size_t, respectively.
(grub_disk_write): Likewise.
All callers and references changed.
* fs/iso9660.c (grub_iso9660_susp_iterate): Cast parameters to
char * for grub_strncmp to silence gcc.
(grub_iso9660_mount): Likewise.
(grub_iso9660_mount): Likewise.
(grub_iso9660_read_symlink): Likewise. Also, remove the nonsense
return statement.
(grub_iso9660_iterate_dir): Likewise.
(grub_iso9660_label): Cast DATA->VOLDESC.VOLNAME to char *.
* fs/hfs.c (grub_hfs_read_file): Change the types of SECTOR and
LEN to grub_disk_addr_t and grub_size_t, respectively.
* fs/hfsplus.c (grub_hfsplus_read_file): Likewise.
* fs/jfs.c (grub_jfs_read_file): Likewise.
* fs/minix.c (grub_jfs_read_file): Likewise.
* fs/sfs.c (grub_jfs_read_file): Likewise.
* fs/ufs.c (grub_jfs_read_file): Likewise.
* fs/xfs.c (grub_jfs_read_file): Likewise.
* fs/fat.c (grub_fat_read_data): Change the types of SECTOR, LEN
and SIZE to grub_disk_addr_t, grub_size_t and grub_size_t,
respectively.
* fs/ext2.c (grub_ext2_read_block): When an error happens, set
BLKNR to -1 instead of returning GRUB_ERRNO.
(grub_ext2_read_file): Change the types of SECTOR and
LEN to grub_disk_addr_t and grub_size_t, respectively.
* fs/affs.c (grub_affs_read_file): Change the types of SECTOR and
LEN to grub_disk_addr_t and grub_size_t, respectively.
* font/manager.c (grub_font_get_glyph): Cast BITMAP to char * for
grub_file_read.
* disk/ieee1275/ofdisk.c (grub_ofdisk_read): Fix the format
string. Do not cast SECTOR explicitly.
* disk/i386/pc/biosdisk.c (grub_biosdisk_open): Change the type of
TOTAL_SECTORS to grub_uint64_t. Do not mask DRP->TOTAL_SECTORS.
(grub_biosdisk_rw): Change the types of SECTOR and SIZE to
grub_disk_addr_t and grub_size_t, respectively. If the sector is
over 2TB and LBA mode is not supported, raise an error.
(get_safe_sectors): New function.
(grub_biosdisk_read): Use get_safe_sectors.
(grub_biosdisk_write): Likewise.
* disk/efi/efidisk.c (grub_efidisk_read): Fix the format string.
(grub_efidisk_write): Likewise.
* disk/loopback.c (delete_loopback): Cosmetic changes.
(grub_cmd_loopback): Likewise. Also, test NEWDEV->FILENAME
correctly.
(grub_loopback_open): Likewise.
(grub_loopback_read): Likewise. Also, change the type of POS to
grub_off_t, and fix the usage of grub_memset.
* commands/i386/pc/play.c: Include grub/machine/time.h.
* commands/ls.c (grub_ls_list_files): Use "llu" instead of "d" to
print FILE->SIZE.
* commands/configfile.c: Include grub/env.h.
* commands/cmp.c (grub_cmd_cmp): Do not use ERR, but use
GRUB_ERRNO directly instead. Change the type of POS to
grub_off_t. Follow the coding standard.
* commands/blocklist.c: Include grub/partition.h.
(grub_cmd_blocklist): Return an error if the underlying device is
not a disk. Take the starting sector of a partition into account,
if a partition is used.
* boot/i386/pc/diskboot.S (bootloop): Adapted to the new offset of
a length field.
(lba_mode): Support 64-bit addresses.
(chs_mode): Likewise.
(copy_buffer): Adapted to the new offsets of a length field and a
segment field.
(blocklist_default_start): Allocate 64-bit space.
* boot/i386/pc/boot.S (force_lba): Removed.
(boot_drive): Moved to under KERNEL_SECTOR.
(kernel_sector): Moved to under KENREL_SEGMENT. Allocate 64-bit
space.
(real_start): Set %si earlier. Remove code for FORCE_LBA, since it
is useless.
(lba_mode): Refactored to support a 64-bit address. More size
optimization.
(setup_sectors): Likewise.
* commands/blocklist.c: New file.
* DISTLIST: Added commands/blocklist.c.
* term/efi/console.c (grub_console_highlight_color): Use a lighter
color for the background, and a daker color for the foreground.
(grub_console_checkkey): Return READ_KEY.
(grub_console_cls): Set the background to
GRUB_EFI_BACKGROUND_BLACK temporarily to clean out the screen.
* kern/efi/efi.c (grub_efi_exit_boot_services): New function.
* include/grub/i386/linux.h (struct linux_kernel_params): Fixed
the size of "padding5", "hd0_drive_info" and "hd1_drive_info".
* include/grub/efi/efi.h (grub_efi_exit_boot_services): New
prototype.
* include/grub/efi/api.h (GRUB_EFI_TEXT_ATTR): Do not shift
BG. The spec is wrong again.
* include/grub/normal.h [GRUB_UTIL] (grub_blocklist_init): New
prototype.
[GRUB_UTIL] (grub_blocklist_fini): Likewise.
* conf/i386-pc.rmk (grub_emu_SOURCES): Added
commands/blocklist.c.
* conf/powerpc-ieee1275.rmk (grub_emu_SOURCES): Likewise.
* conf/common.rmk (pkgdata_MODULES): Added blocklist.mod.
(blocklist_mod_SOURCES): New variable.
(blocklist_mod_CFLAGS): Likewise.
(blocklist_mod_LDFLAGS): Likewise.
* kern/i386/pc/startup.S: Include grub/cpu/linux.h instead of
grub/machine/linux.h
* loader/i386/pc/linux.c: Likewise.
* include/grub/i386/pc/linux.h: Moved to ...
* include/grub/i386/linux.h: ... here.
* include/grub/i386/linux.h (struct linux_kernel_params): New
struct.
* kern/env.c (struct grub_env_context): Removed "sorted". Renamed
"next" to "prev" for readability.
(struct grub_env_sorted_var): New struct.
(grub_env_context): Renamed to ...
(initial_context): ... this.
(grub_env_var_context): Renamed to ...
(current_context): ... this.
(grub_env_find): Look only at CURRENT_CONTEXT.
(grub_env_context_open): Rewritten to copy exported variables from
previous context.
(grub_env_context_close): Rewritten according to the new
scheme. Also, add an assertion to prevent the initial context from
removed.
(grub_env_insert): Removed the code for the sorted list.
(grub_env_remove): Likewise.
(grub_env_export): Simply mark the variable with
GRUB_ENV_VAR_GLOBAL.
(grub_env_set): A cosmetic change for naming consistency.
(grub_env_get): Likewise.
(grub_env_unset): Likewise.
(grub_env_iterate): Rewritten to sort variables within this
function.
(grub_register_variable_hook): Fixed for naming consistency. Call
grub_env_find again, only if NAME is not found at the first time.
(mangle_data_slot_name): New function.
(grub_env_set_data_slot): Likewise.
(grub_env_get_data_slot): Likewise.
(grub_env_unset_data_slot): Likewise.
* include/grub/env.h (grub_env_var_type): New enum.
(GRUB_ENV_VAR_LOCAL): New constant.
(GRUB_ENV_VAR_GLOBAL): Likewise.
(GRUB_ENV_VAR_DATA): Likewise.
(struct grub_env_var): Removed "sort_next" and "sort_prevp". Added
"type".
(grub_env_set): Replace VAR with NAME for consistency.
(grub_register_variable_hook): Likewise.
(grub_env_export): Specify the name of the argument.
(grub_env_set_data_slot): New prototype.
(grub_env_get_data_slot): Likewise.
(grub_env_unset_data_slot): Likewise.
