efi_loader: support EFI_LOAD_FILE_PROTOCOL
Support loading images via the EFI_LOAD_FILE_PROTOCOL and
EFI_LOAD_FILE2_PROTOCOL.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 1983ca3..9bd63b6 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1942,6 +1942,10 @@
efi_handle_t device;
efi_status_t ret;
struct efi_device_path *dp;
+ struct efi_load_file_protocol *load_file_protocol = NULL;
+ efi_uintn_t buffer_size;
+ uint64_t addr, pages;
+ const efi_guid_t *guid;
/* In case of failure nothing is returned */
*buffer = NULL;
@@ -1952,7 +1956,50 @@
&efi_simple_file_system_protocol_guid, &dp, &device));
if (ret == EFI_SUCCESS)
return efi_load_image_from_file(file_path, buffer, size);
- return EFI_NOT_FOUND;
+
+ ret = EFI_CALL(efi_locate_device_path(
+ &efi_guid_load_file_protocol, &dp, &device));
+ if (ret == EFI_SUCCESS) {
+ guid = &efi_guid_load_file_protocol;
+ } else if (!boot_policy) {
+ guid = &efi_guid_load_file2_protocol;
+ ret = EFI_CALL(efi_locate_device_path(guid, &dp, &device));
+ }
+ if (ret != EFI_SUCCESS)
+ return EFI_NOT_FOUND;
+ ret = EFI_CALL(efi_handle_protocol(device, guid,
+ (void **)&load_file_protocol));
+ if (ret != EFI_SUCCESS)
+ return EFI_NOT_FOUND;
+ buffer_size = 0;
+ ret = load_file_protocol->load_file(load_file_protocol, dp,
+ boot_policy, &buffer_size,
+ NULL);
+ if (ret != EFI_BUFFER_TOO_SMALL)
+ goto out;
+ pages = efi_size_in_pages(buffer_size);
+ ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, EFI_BOOT_SERVICES_DATA,
+ pages, &addr);
+ if (ret != EFI_SUCCESS) {
+ ret = EFI_OUT_OF_RESOURCES;
+ goto out;
+ }
+ ret = EFI_CALL(load_file_protocol->load_file(
+ load_file_protocol, dp, boot_policy,
+ &buffer_size, (void *)(uintptr_t)addr));
+ if (ret != EFI_SUCCESS)
+ efi_free_pages(addr, pages);
+out:
+ if (load_file_protocol)
+ EFI_CALL(efi_close_protocol(device,
+ &efi_guid_load_file2_protocol,
+ efi_root, NULL));
+ if (ret == EFI_SUCCESS) {
+ *buffer = (void *)(uintptr_t)addr;
+ *size = buffer_size;
+ }
+
+ return ret;
}
/**