Extend the loader so that GRUB can accept a loader which comes
back to GRUB when a loaded image exits. Also, this change adds
support for a chainloader on EFI.
* term/efi/console.c: Include grub/misc.h.
(grub_console_checkkey): Display a scan code on the top for
debugging. This will be removed once the EFI port gets stable.
Correct the scan code mapping.
* kern/efi/mm.c (sort_memory_map): Sort in a descending order to
allocate memory from larger regions, in order to reduce the number
of allocated regions. Otherwise, the MacOSX loader panics.
(filter_memory_map): Avoid less than 1MB for compatibility with
other loaders.
(add_memory_regions): Allocate from the tail of a region, if
possible, to avoid allocating a region near to 1MB, for the MacOSX
loader.
* kern/efi/init.c (grub_efi_set_prefix): Specify
GRUB_EFI_IMAGE_HANDLE to grub_efi_get_loaded_image.
* kern/efi/efi.c (grub_efi_get_loaded_image): Accept a new
argument IMAGE_HANDLE and specify it to get a loaded image.
(grub_arch_modules_addr): Specify GRUB_EFI_IMAGE_HANDLE to
grub_efi_get_loaded_image.
(grub_efi_get_filename): Divide the legnth by the size of
grub_efi_char16_t.
(grub_efi_get_device_path): New function.
(grub_efi_print_device_path): Print End Device Path nodes. Divide
the length by the size of grub_efi_char16_t for a file path device
path node.
* kern/loader.c (grub_loader_noreturn): New variable.
(grub_loader_set): Accept a new argument NORETURN. Set
GRUB_LOADER_NORETURN to NORETURN.
All callers changed.
(grub_loader_boot): If GRUB_LOADER_NORETURN is false, do not call
grub_machine_fini.
* include/grub/efi/efi.h (grub_efi_get_device_path): New
prototype.
(grub_efi_get_loaded_image): Take an argument to specify an image
handle.
* include/grub/loader.h (grub_loader_set): Added one more argument
NORETURN.
* disk/efi/efidisk.c (make_devices): Use grub_efi_get_device_path
instead of grub_efi_open_protocol.
(grub_efidisk_get_device_name): Likewise.
(grub_efidisk_close): Print a newline.
(grub_efidisk_get_device_handle): Fixed to use
GRUB_EFI_DEVICE_PATH_SUBTYPE instead of
GRUB_EFI_DEVICE_PATH_TYPE.
* disk/efi/efidisk.c (device_path_guid): Moved to ...
* kern/efi/efi.c (device_path_guid): ... here.
* conf/i386-efi.rmk (pkgdata_MODULES): Added _chain.mod and
chain.mod.
(kernel_mod_HEADERS): Added efi/disk.h.
(_chain_mod_SOURCES): New variable.
(_chain_mod_CFLAGS): Likewise.
(_chain_mod_LDFLAGS): Likewise.
(chain_mod_SOURCES): Likewise.
(chain_mod_CFLAGS): Likewise.
(chain_mod_LDFLAGS): Likewise.
* DISTLIST: Added include/grub/efi/chainloader.h,
loader/efi/chainloader.c and loader/efi/chainloader_normal.c.
* include/grub/efi/chainloader.h: New file.
* loader/efi/chainloader.c: Likewise.
* loader/efi/chainloader_normal.c: Likewise.
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