diff options
| -rw-r--r-- | include/efi_loader.h | 3 | ||||
| -rw-r--r-- | lib/efi_loader/efi_device_path.c | 20 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/efi_loader.h b/include/efi_loader.h index ff59005ff4..2db4e9c09b 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -312,6 +312,9 @@ struct efi_device_path *efi_dp_from_eth(void); struct efi_device_path *efi_dp_from_mem(uint32_t mem_type, uint64_t start_address, uint64_t end_address); +/* Determine the last device path node that is not the end node. */ +const struct efi_device_path *efi_dp_last_node( + const struct efi_device_path *dp); efi_status_t efi_dp_split_file_path(struct efi_device_path *full_path, struct efi_device_path **device_path, struct efi_device_path **file_path); diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c index f00a0ce645..c941ea7717 100644 --- a/lib/efi_loader/efi_device_path.c +++ b/lib/efi_loader/efi_device_path.c @@ -208,6 +208,26 @@ struct efi_object *efi_dp_find_obj(struct efi_device_path *dp, return efiobj; } +/* + * Determine the last device path node that is not the end node. + * + * @dp device path + * @return last node before the end node if it exists + * otherwise NULL + */ +const struct efi_device_path *efi_dp_last_node(const struct efi_device_path *dp) +{ + struct efi_device_path *ret; + + if (!dp || dp->type == DEVICE_PATH_TYPE_END) + return NULL; + while (dp) { + ret = (struct efi_device_path *)dp; + dp = efi_dp_next(dp); + } + return ret; +} + /* return size not including End node: */ unsigned efi_dp_size(const struct efi_device_path *dp) { |