1 // SPDX-License-Identifier: GPL-2.0+
30 /* Parse serialized data and transform it into efi_load_option structure */
31 void efi_deserialize_load_option(struct efi_load_option *lo, u8 *data)  in efi_deserialize_load_option()  argument
33 	lo->attributes = get_unaligned_le32(data);  in efi_deserialize_load_option()
34 	data += sizeof(u32);  in efi_deserialize_load_option()
36 	lo->file_path_length = get_unaligned_le16(data);  in efi_deserialize_load_option()
37 	data += sizeof(u16);  in efi_deserialize_load_option()
40 	lo->label = (u16 *)data;  in efi_deserialize_load_option()
41 	data += (u16_strlen(lo->label) + 1) * sizeof(u16);  in efi_deserialize_load_option()
44 	lo->file_path = (struct efi_device_path *)data;  in efi_deserialize_load_option()
45 	data += lo->file_path_length;  in efi_deserialize_load_option()
47 	lo->optional_data = data;  in efi_deserialize_load_option()
52  * Return a size of allocated data.
54 unsigned long efi_serialize_load_option(struct efi_load_option *lo, u8 **data)  in efi_serialize_load_option()  argument
57 	unsigned long size;  in efi_serialize_load_option()  local
60 	label_len = (u16_strlen(lo->label) + 1) * sizeof(u16);  in efi_serialize_load_option()
61 	option_len = strlen((char *)lo->optional_data);  in efi_serialize_load_option()
63 	/* total size */  in efi_serialize_load_option()
64 	size = sizeof(lo->attributes);  in efi_serialize_load_option()
65 	size += sizeof(lo->file_path_length);  in efi_serialize_load_option()
66 	size += label_len;  in efi_serialize_load_option()
67 	size += lo->file_path_length;  in efi_serialize_load_option()
68 	size += option_len + 1;  in efi_serialize_load_option()
69 	p = malloc(size);  in efi_serialize_load_option()
73 	/* copy data */  in efi_serialize_load_option()
74 	*data = p;  in efi_serialize_load_option()
75 	memcpy(p, &lo->attributes, sizeof(lo->attributes));  in efi_serialize_load_option()
76 	p += sizeof(lo->attributes);  in efi_serialize_load_option()
78 	memcpy(p, &lo->file_path_length, sizeof(lo->file_path_length));  in efi_serialize_load_option()
79 	p += sizeof(lo->file_path_length);  in efi_serialize_load_option()
81 	memcpy(p, lo->label, label_len);  in efi_serialize_load_option()
84 	memcpy(p, lo->file_path, lo->file_path_length);  in efi_serialize_load_option()
85 	p += lo->file_path_length;  in efi_serialize_load_option()
87 	memcpy(p, lo->optional_data, option_len);  in efi_serialize_load_option()
91 	return size;  in efi_serialize_load_option()
96 		     efi_uintn_t *size)  in get_var()  argument
102 	*size = 0;  in get_var()
103 	EFI_CALL(ret = rs->get_variable(name, v, NULL, size, buf));  in get_var()
105 		buf = malloc(*size);  in get_var()
106 		EFI_CALL(ret = rs->get_variable(name, v, NULL, size, buf));  in get_var()
111 		*size = 0;  in get_var()
119  * Attempt to load load-option number 'n', returning device_path and file_path
130 	efi_uintn_t size;  in try_load_entry()  local
137 	load_option = get_var(varname, &efi_global_variable_guid, &size);  in try_load_entry()
149 		ret = efi_load_image_from_path(lo.file_path, &image, &size);  in try_load_entry()
166  * available load-options, finding and returning the first one that can
173 	efi_uintn_t size;  in efi_bootmgr_load()  local
180 	bootorder = get_var(L"BootOrder", &efi_global_variable_guid, &size);  in efi_bootmgr_load()
186 	num = size / sizeof(uint16_t);  in efi_bootmgr_load()