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efidebug.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* UEFI Shell-like command
*
* Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
*/
#include <charset.h>
#include <common.h>
#include <command.h>
#include <efi_loader.h>
#include <exports.h>
#include <hexdump.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <search.h>
#include <linux/ctype.h>
#define BS systab.boottime
/**
* efi_get_device_handle_info() - get information of UEFI device
*
* @handle: Handle of UEFI device
* @dev_path_text: Pointer to text of device path
* Return: 0 on success, -1 on failure
*
* Currently return a formatted text of device path.
*/
static int efi_get_device_handle_info(efi_handle_t handle, u16 **dev_path_text)
{
struct efi_device_path *dp;
efi_status_t ret;
ret = EFI_CALL(BS->open_protocol(handle, &efi_guid_device_path,
(void **)&dp, NULL /* FIXME */, NULL,
EFI_OPEN_PROTOCOL_GET_PROTOCOL));
if (ret == EFI_SUCCESS) {
*dev_path_text = efi_dp_str(dp);
return 0;
} else {
return -1;
}
}
#define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2)
static const char spc[] = " ";
static const char sep[] = "================";
/**
* do_efi_show_devices() - show UEFI devices
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "devices" sub-command.
* Show all UEFI devices and their information.
*/
static int do_efi_show_devices(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_handle_t *handles;
efi_uintn_t num, i;
u16 *dev_path_text;
efi_status_t ret;
ret = EFI_CALL(efi_locate_handle_buffer(ALL_HANDLES, NULL, NULL,
&num, &handles));
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
if (!num)
return CMD_RET_SUCCESS;
printf("Device%.*s Device Path\n", EFI_HANDLE_WIDTH - 6, spc);
printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
for (i = 0; i < num; i++) {
if (!efi_get_device_handle_info(handles[i], &dev_path_text)) {
printf("%p %ls\n", handles[i], dev_path_text);
efi_free_pool(dev_path_text);
}
}
efi_free_pool(handles);
return CMD_RET_SUCCESS;
}
/**
* efi_get_driver_handle_info() - get information of UEFI driver
*
* @handle: Handle of UEFI device
* @driver_name: Driver name
* @image_path: Pointer to text of device path
* Return: 0 on success, -1 on failure
*
* Currently return no useful information as all UEFI drivers are
* built-in..
*/
static int efi_get_driver_handle_info(efi_handle_t handle, u16 **driver_name,
u16 **image_path)
{
struct efi_handler *handler;
struct efi_loaded_image *image;
efi_status_t ret;
/*
* driver name
* TODO: support EFI_COMPONENT_NAME2_PROTOCOL
*/
*driver_name = NULL;
/* image name */
ret = efi_search_protocol(handle, &efi_guid_loaded_image, &handler);
if (ret != EFI_SUCCESS) {
*image_path = NULL;
return 0;
}
image = handler->protocol_interface;
*image_path = efi_dp_str(image->file_path);
return 0;
}
/**
* do_efi_show_drivers() - show UEFI drivers
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "drivers" sub-command.
* Show all UEFI drivers and their information.
*/
static int do_efi_show_drivers(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_handle_t *handles;
efi_uintn_t num, i;
u16 *driver_name, *image_path_text;
efi_status_t ret;
ret = EFI_CALL(efi_locate_handle_buffer(
BY_PROTOCOL, &efi_guid_driver_binding_protocol,
NULL, &num, &handles));
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
if (!num)
return CMD_RET_SUCCESS;
printf("Driver%.*s Name Image Path\n",
EFI_HANDLE_WIDTH - 6, spc);
printf("%.*s ==================== ====================\n",
EFI_HANDLE_WIDTH, sep);
for (i = 0; i < num; i++) {
if (!efi_get_driver_handle_info(handles[i], &driver_name,
&image_path_text)) {
if (image_path_text)
printf("%p %-20ls %ls\n", handles[i],
driver_name, image_path_text);
else
printf("%p %-20ls <built-in>\n",
handles[i], driver_name);
efi_free_pool(driver_name);
efi_free_pool(image_path_text);
}
}
efi_free_pool(handles);
return CMD_RET_SUCCESS;
}
static const struct {
const char *text;
const efi_guid_t guid;
} guid_list[] = {
{
"Device Path",
EFI_DEVICE_PATH_PROTOCOL_GUID,
},
{
"Device Path To Text",
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID,
},
{
"Device Path Utilities",
EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID,
},
{
"Unicode Collation 2",
EFI_UNICODE_COLLATION_PROTOCOL2_GUID,
},
{
"Driver Binding",
EFI_DRIVER_BINDING_PROTOCOL_GUID,
},
{
"Simple Text Input",
EFI_SIMPLE_TEXT_INPUT_PROTOCOL_GUID,
},
{
"Simple Text Input Ex",
EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL_GUID,
},
{
"Simple Text Output",
EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL_GUID,
},
{
"Block IO",
EFI_BLOCK_IO_PROTOCOL_GUID,
},
{
"Simple File System",
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID,
},
{
"Loaded Image",
EFI_LOADED_IMAGE_PROTOCOL_GUID,
},
{
"Graphics Output",
EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID,
},
{
"HII String",
EFI_HII_STRING_PROTOCOL_GUID,
},
{
"HII Database",
EFI_HII_DATABASE_PROTOCOL_GUID,
},
{
"HII Config Routing",
EFI_HII_CONFIG_ROUTING_PROTOCOL_GUID,
},
{
"Load File2",
EFI_LOAD_FILE2_PROTOCOL_GUID,
},
{
"Simple Network",
EFI_SIMPLE_NETWORK_PROTOCOL_GUID,
},
{
"PXE Base Code",
EFI_PXE_BASE_CODE_PROTOCOL_GUID,
},
/* Configuration table GUIDs */
{
"ACPI table",
EFI_ACPI_TABLE_GUID,
},
{
"device tree",
EFI_FDT_GUID,
},
{
"SMBIOS table",
SMBIOS_TABLE_GUID,
},
{
"Runtime properties",
EFI_RT_PROPERTIES_TABLE_GUID,
},
};
/**
* get_guid_text - get string of GUID
*
* Return description of GUID.
*
* @guid: GUID
* Return: description of GUID or NULL
*/
static const char *get_guid_text(const void *guid)
{
int i;
for (i = 0; i < ARRAY_SIZE(guid_list); i++) {
/*
* As guidcmp uses memcmp() we can safely accept unaligned
* GUIDs.
*/
if (!guidcmp(&guid_list[i].guid, guid))
return guid_list[i].text;
}
return NULL;
}
/**
* do_efi_show_handles() - show UEFI handles
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "dh" sub-command.
* Show all UEFI handles and their information, currently all protocols
* added to handle.
*/
static int do_efi_show_handles(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_handle_t *handles;
efi_guid_t **guid;
efi_uintn_t num, count, i, j;
const char *guid_text;
efi_status_t ret;
ret = EFI_CALL(efi_locate_handle_buffer(ALL_HANDLES, NULL, NULL,
&num, &handles));
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
if (!num)
return CMD_RET_SUCCESS;
printf("Handle%.*s Protocols\n", EFI_HANDLE_WIDTH - 6, spc);
printf("%.*s ====================\n", EFI_HANDLE_WIDTH, sep);
for (i = 0; i < num; i++) {
printf("%p", handles[i]);
ret = EFI_CALL(BS->protocols_per_handle(handles[i], &guid,
&count));
if (ret || !count) {
putc('\n');
continue;
}
for (j = 0; j < count; j++) {
if (j)
printf(", ");
else
putc(' ');
guid_text = get_guid_text(guid[j]);
if (guid_text)
puts(guid_text);
else
printf("%pUl", guid[j]);
}
putc('\n');
}
efi_free_pool(handles);
return CMD_RET_SUCCESS;
}
/**
* do_efi_show_images() - show UEFI images
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "images" sub-command.
* Show all UEFI loaded images and their information.
*/
static int do_efi_show_images(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_print_image_infos(NULL);
return CMD_RET_SUCCESS;
}
static const char * const efi_mem_type_string[] = {
[EFI_RESERVED_MEMORY_TYPE] = "RESERVED",
[EFI_LOADER_CODE] = "LOADER CODE",
[EFI_LOADER_DATA] = "LOADER DATA",
[EFI_BOOT_SERVICES_CODE] = "BOOT CODE",
[EFI_BOOT_SERVICES_DATA] = "BOOT DATA",
[EFI_RUNTIME_SERVICES_CODE] = "RUNTIME CODE",
[EFI_RUNTIME_SERVICES_DATA] = "RUNTIME DATA",
[EFI_CONVENTIONAL_MEMORY] = "CONVENTIONAL",
[EFI_UNUSABLE_MEMORY] = "UNUSABLE MEM",
[EFI_ACPI_RECLAIM_MEMORY] = "ACPI RECLAIM MEM",
[EFI_ACPI_MEMORY_NVS] = "ACPI NVS",
[EFI_MMAP_IO] = "IO",
[EFI_MMAP_IO_PORT] = "IO PORT",
[EFI_PAL_CODE] = "PAL",
[EFI_PERSISTENT_MEMORY_TYPE] = "PERSISTENT",
};
static const struct efi_mem_attrs {
const u64 bit;
const char *text;
} efi_mem_attrs[] = {
{EFI_MEMORY_UC, "UC"},
{EFI_MEMORY_UC, "UC"},
{EFI_MEMORY_WC, "WC"},
{EFI_MEMORY_WT, "WT"},
{EFI_MEMORY_WB, "WB"},
{EFI_MEMORY_UCE, "UCE"},
{EFI_MEMORY_WP, "WP"},
{EFI_MEMORY_RP, "RP"},
{EFI_MEMORY_XP, "WP"},
{EFI_MEMORY_NV, "NV"},
{EFI_MEMORY_MORE_RELIABLE, "REL"},
{EFI_MEMORY_RO, "RO"},
{EFI_MEMORY_SP, "SP"},
{EFI_MEMORY_RUNTIME, "RT"},
};
/**
* print_memory_attributes() - print memory map attributes
*
* @attributes: Attribute value
*
* Print memory map attributes
*/
static void print_memory_attributes(u64 attributes)
{
int sep, i;
for (sep = 0, i = 0; i < ARRAY_SIZE(efi_mem_attrs); i++)
if (attributes & efi_mem_attrs[i].bit) {
if (sep) {
putc('|');
} else {
putc(' ');
sep = 1;
}
puts(efi_mem_attrs[i].text);
}
}
#define EFI_PHYS_ADDR_WIDTH (int)(sizeof(efi_physical_addr_t) * 2)
/**
* do_efi_show_memmap() - show UEFI memory map
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "memmap" sub-command.
* Show UEFI memory map.
*/
static int do_efi_show_memmap(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
struct efi_mem_desc *memmap = NULL, *map;
efi_uintn_t map_size = 0;
const char *type;
int i;
efi_status_t ret;
ret = efi_get_memory_map(&map_size, memmap, NULL, NULL, NULL);
if (ret == EFI_BUFFER_TOO_SMALL) {
map_size += sizeof(struct efi_mem_desc); /* for my own */
ret = efi_allocate_pool(EFI_LOADER_DATA, map_size,
(void *)&memmap);
if (ret != EFI_SUCCESS)
return CMD_RET_FAILURE;
ret = efi_get_memory_map(&map_size, memmap, NULL, NULL, NULL);
}
if (ret != EFI_SUCCESS) {
efi_free_pool(memmap);
return CMD_RET_FAILURE;
}
printf("Type Start%.*s End%.*s Attributes\n",
EFI_PHYS_ADDR_WIDTH - 5, spc, EFI_PHYS_ADDR_WIDTH - 3, spc);
printf("================ %.*s %.*s ==========\n",
EFI_PHYS_ADDR_WIDTH, sep, EFI_PHYS_ADDR_WIDTH, sep);
/*
* Coverity check: dereferencing null pointer "map."
* This is a false positive as memmap will always be
* populated by allocate_pool() above.
*/
for (i = 0, map = memmap; i < map_size / sizeof(*map); map++, i++) {
if (map->type < ARRAY_SIZE(efi_mem_type_string))
type = efi_mem_type_string[map->type];
else
type = "(unknown)";
printf("%-16s %.*llx-%.*llx", type,
EFI_PHYS_ADDR_WIDTH,
(u64)map_to_sysmem((void *)(uintptr_t)
map->physical_start),
EFI_PHYS_ADDR_WIDTH,
(u64)map_to_sysmem((void *)(uintptr_t)
(map->physical_start +
map->num_pages * EFI_PAGE_SIZE)));
print_memory_attributes(map->attribute);
putc('\n');
}
efi_free_pool(memmap);
return CMD_RET_SUCCESS;
}
/**
* do_efi_show_tables() - show UEFI configuration tables
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "tables" sub-command.
* Show UEFI configuration tables.
*/
static int do_efi_show_tables(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_uintn_t i;
const char *guid_str;
for (i = 0; i < systab.nr_tables; ++i) {
guid_str = get_guid_text(&systab.tables[i].guid);
if (!guid_str)
guid_str = "";
printf("%pUl %s\n", &systab.tables[i].guid, guid_str);
}
return CMD_RET_SUCCESS;
}
/**
* do_efi_boot_add() - set UEFI load option
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success,
* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "boot add" sub-command. Create or change UEFI load option.
*
* efidebug boot add <id> <label> <interface> <devnum>[:<part>] <file> <options>
*/
static int do_efi_boot_add(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int id;
char *endp;
char var_name[9];
u16 var_name16[9], *p;
efi_guid_t guid;
size_t label_len, label_len16;
u16 *label;
struct efi_device_path *device_path = NULL, *file_path = NULL;
struct efi_load_option lo;
void *data = NULL;
efi_uintn_t size;
efi_status_t ret;
int r = CMD_RET_SUCCESS;
if (argc < 6 || argc > 7)
return CMD_RET_USAGE;
id = (int)simple_strtoul(argv[1], &endp, 16);
if (*endp != '\0' || id > 0xffff)
return CMD_RET_USAGE;
sprintf(var_name, "Boot%04X", id);
p = var_name16;
utf8_utf16_strncpy(&p, var_name, 9);
guid = efi_global_variable_guid;
/* attributes */
lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */
/* label */
label_len = strlen(argv[2]);
label_len16 = utf8_utf16_strnlen(argv[2], label_len);
label = malloc((label_len16 + 1) * sizeof(u16));
if (!label)
return CMD_RET_FAILURE;
lo.label = label; /* label will be changed below */
utf8_utf16_strncpy(&label, argv[2], label_len);
/* file path */
ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path,
&file_path);
if (ret != EFI_SUCCESS) {
printf("Cannot create device path for \"%s %s\"\n",
argv[3], argv[4]);
r = CMD_RET_FAILURE;
goto out;
}
lo.file_path = file_path;
lo.file_path_length = efi_dp_size(file_path)
+ sizeof(struct efi_device_path); /* for END */
/* optional data */
if (argc == 6)
lo.optional_data = NULL;
else
lo.optional_data = (const u8 *)argv[6];
size = efi_serialize_load_option(&lo, (u8 **)&data);
if (!size) {
r = CMD_RET_FAILURE;
goto out;
}
ret = EFI_CALL(efi_set_variable(var_name16, &guid,
EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
size, data));
if (ret != EFI_SUCCESS) {
printf("Cannot set %ls\n", var_name16);
r = CMD_RET_FAILURE;
}
out:
free(data);
efi_free_pool(device_path);
efi_free_pool(file_path);
free(lo.label);
return r;
}
/**
* do_efi_boot_rm() - delete UEFI load options
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "boot rm" sub-command.
* Delete UEFI load options.
*
* efidebug boot rm <id> ...
*/
static int do_efi_boot_rm(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
efi_guid_t guid;
int id, i;
char *endp;
char var_name[9];
u16 var_name16[9], *p;
efi_status_t ret;
if (argc == 1)
return CMD_RET_USAGE;
guid = efi_global_variable_guid;
for (i = 1; i < argc; i++, argv++) {
id = (int)simple_strtoul(argv[1], &endp, 16);
if (*endp != '\0' || id > 0xffff)
return CMD_RET_FAILURE;
sprintf(var_name, "Boot%04X", id);
p = var_name16;
utf8_utf16_strncpy(&p, var_name, 9);
ret = EFI_CALL(efi_set_variable(var_name16, &guid, 0, 0, NULL));
if (ret) {
printf("Cannot remove %ls\n", var_name16);
return CMD_RET_FAILURE;
}
}
return CMD_RET_SUCCESS;
}
/**
* show_efi_boot_opt_data() - dump UEFI load option
*
* @varname16: variable name
* @data: value of UEFI load option variable
* @size: size of the boot option
*
* Decode the value of UEFI load option variable and print information.
*/
static void show_efi_boot_opt_data(u16 *varname16, void *data, size_t *size)
{
struct efi_load_option lo;
char *label, *p;
size_t label_len16, label_len;
u16 *dp_str;
efi_status_t ret;
ret = efi_deserialize_load_option(&lo, data, size);
if (ret != EFI_SUCCESS) {
printf("%ls: invalid load option\n", varname16);
return;
}
label_len16 = u16_strlen(lo.label);
label_len = utf16_utf8_strnlen(lo.label, label_len16);
label = malloc(label_len + 1);
if (!label)
return;
p = label;
utf16_utf8_strncpy(&p, lo.label, label_len16);
printf("%ls:\nattributes: %c%c%c (0x%08x)\n",
varname16,
/* ACTIVE */
lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-',
/* FORCE RECONNECT */
lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-',
/* HIDDEN */
lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-',
lo.attributes);
printf(" label: %s\n", label);
dp_str = efi_dp_str(lo.file_path);
printf(" file_path: %ls\n", dp_str);
efi_free_pool(dp_str);
printf(" data:\n");
print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1,
lo.optional_data, *size, true);
free(label);
}
/**
* show_efi_boot_opt() - dump UEFI load option
*
* @varname16: variable name
*
* Dump information defined by UEFI load option.
*/
static void show_efi_boot_opt(u16 *varname16)
{
void *data;
efi_uintn_t size;
efi_status_t ret;
size = 0;
ret = EFI_CALL(efi_get_variable(varname16, &efi_global_variable_guid,
NULL, &size, NULL));
if (ret == EFI_BUFFER_TOO_SMALL) {
data = malloc(size);
if (!data) {
printf("ERROR: Out of memory\n");
return;
}
ret = EFI_CALL(efi_get_variable(varname16,
&efi_global_variable_guid,
NULL, &size, data));
if (ret == EFI_SUCCESS)
show_efi_boot_opt_data(varname16, data, &size);
free(data);
}
}
static int u16_tohex(u16 c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
/* not hexadecimal */
return -1;
}
/**
* show_efi_boot_dump() - dump all UEFI load options
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "boot dump" sub-command.
* Dump information of all UEFI load options defined.
*
* efidebug boot dump
*/
static int do_efi_boot_dump(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
u16 *var_name16, *p;
efi_uintn_t buf_size, size;
efi_guid_t guid;
int id, i, digit;
efi_status_t ret;
if (argc > 1)
return CMD_RET_USAGE;
buf_size = 128;
var_name16 = malloc(buf_size);
if (!var_name16)
return CMD_RET_FAILURE;
var_name16[0] = 0;
for (;;) {
size = buf_size;
ret = EFI_CALL(efi_get_next_variable_name(&size, var_name16,
&guid));
if (ret == EFI_NOT_FOUND)
break;
if (ret == EFI_BUFFER_TOO_SMALL) {
buf_size = size;
p = realloc(var_name16, buf_size);
if (!p) {
free(var_name16);
return CMD_RET_FAILURE;
}
var_name16 = p;
ret = EFI_CALL(efi_get_next_variable_name(&size,
var_name16,
&guid));
}
if (ret != EFI_SUCCESS) {
free(var_name16);
return CMD_RET_FAILURE;
}
if (memcmp(var_name16, L"Boot", 8))
continue;
for (id = 0, i = 0; i < 4; i++) {
digit = u16_tohex(var_name16[4 + i]);
if (digit < 0)
break;
id = (id << 4) + digit;
}
if (i == 4 && !var_name16[8])
show_efi_boot_opt(var_name16);
}
free(var_name16);
return CMD_RET_SUCCESS;
}
/**
* show_efi_boot_order() - show order of UEFI load options
*
* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
*
* Show order of UEFI load options defined by BootOrder variable.
*/
static int show_efi_boot_order(void)
{
u16 *bootorder;
efi_uintn_t size;
int num, i;
char var_name[9];
u16 var_name16[9], *p16;
void *data;
struct efi_load_option lo;
char *label, *p;
size_t label_len16, label_len;
efi_status_t ret;
size = 0;
ret = EFI_CALL(efi_get_variable(L"BootOrder", &efi_global_variable_guid,
NULL, &size, NULL));
if (ret != EFI_BUFFER_TOO_SMALL) {
if (ret == EFI_NOT_FOUND) {
printf("BootOrder not defined\n");
return CMD_RET_SUCCESS;
} else {
return CMD_RET_FAILURE;
}
}
bootorder = malloc(size);
if (!bootorder) {
printf("ERROR: Out of memory\n");
return CMD_RET_FAILURE;
}
ret = EFI_CALL(efi_get_variable(L"BootOrder", &efi_global_variable_guid,
NULL, &size, bootorder));
if (ret != EFI_SUCCESS) {
ret = CMD_RET_FAILURE;
goto out;
}
num = size / sizeof(u16);
for (i = 0; i < num; i++) {
sprintf(var_name, "Boot%04X", bootorder[i]);
p16 = var_name16;
utf8_utf16_strncpy(&p16, var_name, 9);
size = 0;
ret = EFI_CALL(efi_get_variable(var_name16,
&efi_global_variable_guid, NULL,
&size, NULL));
if (ret != EFI_BUFFER_TOO_SMALL) {
printf("%2d: %s: (not defined)\n", i + 1, var_name);
continue;
}
data = malloc(size);
if (!data) {
ret = CMD_RET_FAILURE;
goto out;
}
ret = EFI_CALL(efi_get_variable(var_name16,
&efi_global_variable_guid, NULL,
&size, data));
if (ret != EFI_SUCCESS) {
free(data);
ret = CMD_RET_FAILURE;
goto out;
}
ret = efi_deserialize_load_option(&lo, data, &size);
if (ret != EFI_SUCCESS) {
printf("%ls: invalid load option\n", var_name16);
ret = CMD_RET_FAILURE;
goto out;
}
label_len16 = u16_strlen(lo.label);
label_len = utf16_utf8_strnlen(lo.label, label_len16);
label = malloc(label_len + 1);
if (!label) {
free(data);
ret = CMD_RET_FAILURE;
goto out;
}
p = label;
utf16_utf8_strncpy(&p, lo.label, label_len16);
printf("%2d: %s: %s\n", i + 1, var_name, label);
free(label);
free(data);
}
out:
free(bootorder);
return ret;
}
/**
* do_efi_boot_next() - manage UEFI BootNext variable
*
* @cmdtp: Command table
* @flag: Command flag
* @argc: Number of arguments
* @argv: Argument array
* Return: CMD_RET_SUCCESS on success,
* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
*
* Implement efidebug "boot next" sub-command.
* Set BootNext variable.
*
* efidebug boot next <id>
*/
static int do_efi_boot_next(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
u16 bootnext;
efi_uintn_t size;
char *endp;
efi_guid_t guid;
efi_status_t ret;
int r = CMD_RET_SUCCESS;
if (argc != 2)
return CMD_RET_USAGE;
bootnext = (u16)simple_strtoul(argv[1], &endp, 16);
if (*endp) {
printf("invalid value: %s\n", argv[1]);
r = CMD_RET_FAILURE;
goto out;
}
guid = efi_global_variable_guid;
size = sizeof(u16);
ret = EFI_CALL(efi_set_variable(L"BootNext", &guid,
EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
size, &bootnext));
if (ret != EFI_SUCCESS) {
printf("Cannot set BootNext\n");
r = CMD_RET_FAILURE;
}