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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 <dm/device.h>
#include <efi_dt_fixup.h>
#include <efi_load_initrd.h>
#include <efi_loader.h>
#include <efi_rng.h>
#include <efi_variable.h>
#include <exports.h>
#include <hexdump.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <part.h>
#include <search.h>
#include <linux/ctype.h>
#include <linux/err.h>
#define BS systab.boottime
#ifdef CONFIG_EFI_HAVE_CAPSULE_SUPPORT
/**
* do_efi_capsule_update() - process a capsule update
*
* @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 "capsule update" sub-command.
* process a capsule update.
*
* efidebug capsule update [-v] <capsule address>
*/
static int do_efi_capsule_update(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
struct efi_capsule_header *capsule;
int verbose = 0;
char *endp;
efi_status_t ret;
if (argc != 2 && argc != 3)
return CMD_RET_USAGE;
if (argc == 3) {
if (strcmp(argv[1], "-v"))
return CMD_RET_USAGE;
verbose = 1;
argc--;
argv++;
}
capsule = (typeof(capsule))hextoul(argv[1], &endp);
if (endp == argv[1]) {
printf("Invalid address: %s", argv[1]);
return CMD_RET_FAILURE;
}
if (verbose) {
printf("Capsule guid: %pUl\n", &capsule->capsule_guid);
printf("Capsule flags: 0x%x\n", capsule->flags);
printf("Capsule header size: 0x%x\n", capsule->header_size);
printf("Capsule image size: 0x%x\n",
capsule->capsule_image_size);
}
ret = EFI_CALL(efi_update_capsule(&capsule, 1, 0));
if (ret) {
printf("Cannot handle a capsule at %p\n", capsule);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
#ifdef CONFIG_EFI_CAPSULE_ON_DISK
static int do_efi_capsule_on_disk_update(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
efi_status_t ret;
ret = efi_launch_capsules();
return ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE;
}
#endif
/**
* do_efi_capsule_show() - show capsule information
*
* @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 "capsule show" sub-command.
* show capsule information.
*
* efidebug capsule show <capsule address>
*/
static int do_efi_capsule_show(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
struct efi_capsule_header *capsule;
char *endp;
if (argc != 2)
return CMD_RET_USAGE;
capsule = (typeof(capsule))hextoul(argv[1], &endp);
if (endp == argv[1]) {
printf("Invalid address: %s", argv[1]);
return CMD_RET_FAILURE;
}
printf("Capsule guid: %pUl\n", &capsule->capsule_guid);
printf("Capsule flags: 0x%x\n", capsule->flags);
printf("Capsule header size: 0x%x\n", capsule->header_size);
printf("Capsule image size: 0x%x\n",
capsule->capsule_image_size);
return CMD_RET_SUCCESS;
}
#ifdef CONFIG_EFI_ESRT
#define EFI_ESRT_FW_TYPE_NUM 4
char *efi_fw_type_str[EFI_ESRT_FW_TYPE_NUM] = {"unknown", "system FW", "device FW",
"UEFI driver"};
#define EFI_ESRT_UPDATE_STATUS_NUM 9
char *efi_update_status_str[EFI_ESRT_UPDATE_STATUS_NUM] = {"success", "unsuccessful",
"insufficient resources", "incorrect version", "invalid format",
"auth error", "power event (AC)", "power event (batt)",
"unsatisfied dependencies"};
#define EFI_FW_TYPE_STR_GET(idx) (\
EFI_ESRT_FW_TYPE_NUM > (idx) ? efi_fw_type_str[(idx)] : "error"\
)
#define EFI_FW_STATUS_STR_GET(idx) (\
EFI_ESRT_UPDATE_STATUS_NUM > (idx) ? efi_update_status_str[(idx)] : "error"\
)
/**
* do_efi_capsule_esrt() - manage UEFI capsules
*
* @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 "capsule esrt" sub-command.
* The prints the current ESRT table.
*
* efidebug capsule esrt
*/
static int do_efi_capsule_esrt(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
struct efi_system_resource_table *esrt = NULL;
if (argc != 1)
return CMD_RET_USAGE;
for (int idx = 0; idx < systab.nr_tables; idx++)
if (!guidcmp(&efi_esrt_guid, &systab.tables[idx].guid))
esrt = (struct efi_system_resource_table *)systab.tables[idx].table;
if (!esrt) {
log_info("ESRT: table not present\n");
return CMD_RET_SUCCESS;
}
printf("========================================\n");
printf("ESRT: fw_resource_count=%d\n", esrt->fw_resource_count);
printf("ESRT: fw_resource_count_max=%d\n", esrt->fw_resource_count_max);
printf("ESRT: fw_resource_version=%lld\n", esrt->fw_resource_version);
for (int idx = 0; idx < esrt->fw_resource_count; idx++) {
printf("[entry %d]==============================\n", idx);
printf("ESRT: fw_class=%pUL\n", &esrt->entries[idx].fw_class);
printf("ESRT: fw_type=%s\n", EFI_FW_TYPE_STR_GET(esrt->entries[idx].fw_type));
printf("ESRT: fw_version=%d\n", esrt->entries[idx].fw_version);
printf("ESRT: lowest_supported_fw_version=%d\n",
esrt->entries[idx].lowest_supported_fw_version);
printf("ESRT: capsule_flags=%d\n",
esrt->entries[idx].capsule_flags);
printf("ESRT: last_attempt_version=%d\n",
esrt->entries[idx].last_attempt_version);
printf("ESRT: last_attempt_status=%s\n",
EFI_FW_STATUS_STR_GET(esrt->entries[idx].last_attempt_status));
}
printf("========================================\n");
return CMD_RET_SUCCESS;
}
#endif /* CONFIG_EFI_ESRT */
/**
* do_efi_capsule_res() - show a capsule update result
*
* @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 "capsule result" sub-command.
* show a capsule update result.
* If result number is not specified, CapsuleLast will be shown.
*
* efidebug capsule result [<capsule result number>]
*/
static int do_efi_capsule_res(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
int capsule_id;
char *endp;
u16 var_name16[12];
efi_guid_t guid;
struct efi_capsule_result_variable_header *result = NULL;
efi_uintn_t size;
efi_status_t ret;
if (argc != 1 && argc != 2)
return CMD_RET_USAGE;
guid = efi_guid_capsule_report;
if (argc == 1) {
size = sizeof(var_name16);
ret = efi_get_variable_int(u"CapsuleLast", &guid, NULL,
&size, var_name16, NULL);
if (ret != EFI_SUCCESS) {
if (ret == EFI_NOT_FOUND)
printf("CapsuleLast doesn't exist\n");
else
printf("Failed to get CapsuleLast\n");
return CMD_RET_FAILURE;
}
printf("CapsuleLast is %ls\n", var_name16);
} else {
argc--;
argv++;
capsule_id = hextoul(argv[0], &endp);
if (capsule_id < 0 || capsule_id > 0xffff)
return CMD_RET_USAGE;
efi_create_indexed_name(var_name16, sizeof(var_name16),
"Capsule", capsule_id);
}
size = 0;
ret = efi_get_variable_int(var_name16, &guid, NULL, &size, NULL, NULL);
if (ret == EFI_BUFFER_TOO_SMALL) {
result = malloc(size);
if (!result)
return CMD_RET_FAILURE;
ret = efi_get_variable_int(var_name16, &guid, NULL, &size,
result, NULL);
}
if (ret != EFI_SUCCESS) {
free(result);
printf("Failed to get %ls\n", var_name16);
return CMD_RET_FAILURE;
}
printf("Result total size: 0x%x\n", result->variable_total_size);
printf("Capsule guid: %pUl\n", &result->capsule_guid);
printf("Time processed: %04d-%02d-%02d %02d:%02d:%02d\n",
result->capsule_processed.year, result->capsule_processed.month,
result->capsule_processed.day, result->capsule_processed.hour,
result->capsule_processed.minute,
result->capsule_processed.second);
printf("Capsule status: 0x%lx\n", result->capsule_status);
free(result);
return CMD_RET_SUCCESS;
}
static struct cmd_tbl cmd_efidebug_capsule_sub[] = {
U_BOOT_CMD_MKENT(update, CONFIG_SYS_MAXARGS, 1, do_efi_capsule_update,
"", ""),
U_BOOT_CMD_MKENT(show, CONFIG_SYS_MAXARGS, 1, do_efi_capsule_show,
"", ""),
#ifdef CONFIG_EFI_ESRT
U_BOOT_CMD_MKENT(esrt, CONFIG_SYS_MAXARGS, 1, do_efi_capsule_esrt,
"", ""),
#endif
#ifdef CONFIG_EFI_CAPSULE_ON_DISK
U_BOOT_CMD_MKENT(disk-update, 0, 0, do_efi_capsule_on_disk_update,
"", ""),
#endif
U_BOOT_CMD_MKENT(result, CONFIG_SYS_MAXARGS, 1, do_efi_capsule_res,
"", ""),
};
/**
* do_efi_capsule() - manage UEFI capsules
*
* @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 "capsule" sub-command.
*/
static int do_efi_capsule(struct cmd_tbl *cmdtp, int flag,
int argc, char * const argv[])
{
struct cmd_tbl *cp;
if (argc < 2)
return CMD_RET_USAGE;
argc--; argv++;
cp = find_cmd_tbl(argv[0], cmd_efidebug_capsule_sub,
ARRAY_SIZE(cmd_efidebug_capsule_sub));
if (!cp)
return CMD_RET_USAGE;
return cp->cmd(cmdtp, flag, argc, argv);
}
#endif /* CONFIG_EFI_HAVE_CAPSULE_SUPPORT */
#define EFI_HANDLE_WIDTH ((int)sizeof(efi_handle_t) * 2)
static const char spc[] = " ";
static const char sep[] = "================";
/**
* 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;
}
/**
* 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;
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;
for (i = 0; i < num; i++) {
struct efi_handler *handler;
printf("\n%p", handles[i]);
if (handles[i]->dev)
printf(" (%s)", handles[i]->dev->name);
printf("\n");
/* Print device path */
ret = efi_search_protocol(handles[i], &efi_guid_device_path,
&handler);
if (ret == EFI_SUCCESS)
printf(" %pD\n", handler->protocol_interface);
ret = EFI_CALL(BS->protocols_per_handle(handles[i], &guid,
&count));
/* Print other protocols */
for (j = 0; j < count; j++) {
if (guidcmp(guid[j], &efi_guid_device_path))
printf(" %pUs\n", guid[j]);
}
efi_free_pool(guid);
}
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, *map;
efi_uintn_t map_size;
const char *type;
int i;
efi_status_t ret;
ret = efi_get_memory_map_alloc(&map_size, &memmap);
if (ret != EFI_SUCCESS)
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_show_tables(&systab);
return CMD_RET_SUCCESS;
}
/**
* create_initrd_dp() - create a special device for our Boot### option
*
* @dev: device
* @part: disk partition
* @file: filename
* @shortform: create short form device path
* Return: pointer to the device path or ERR_PTR
*/
static
struct efi_device_path *create_initrd_dp(const char *dev, const char *part,
const char *file, int shortform)
{
struct efi_device_path *tmp_dp = NULL, *tmp_fp = NULL, *short_fp = NULL;
struct efi_device_path *initrd_dp = NULL;
efi_status_t ret;
const struct efi_initrd_dp id_dp = {
.vendor = {
{
DEVICE_PATH_TYPE_MEDIA_DEVICE,
DEVICE_PATH_SUB_TYPE_VENDOR_PATH,
sizeof(id_dp.vendor),
},
EFI_INITRD_MEDIA_GUID,
},
.end = {
DEVICE_PATH_TYPE_END,
DEVICE_PATH_SUB_TYPE_END,
sizeof(id_dp.end),
}
};
ret = efi_dp_from_name(dev, part, file, &tmp_dp, &tmp_fp);
if (ret != EFI_SUCCESS) {
printf("Cannot create device path for \"%s %s\"\n", part, file);
goto out;
}
if (shortform)
short_fp = efi_dp_shorten(tmp_fp);
if (!short_fp)
short_fp = tmp_fp;
initrd_dp = efi_dp_append((const struct efi_device_path *)&id_dp,
short_fp);
out:
efi_free_pool(tmp_dp);
efi_free_pool(tmp_fp);
return initrd_dp;
}
/**
* 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 -b <id> <label> <interface> <devnum>[:<part>] <file>
* -i <file> <interface2> <devnum2>[:<part>] <initrd>
* -s '<options>'
*/
static int do_efi_boot_add(struct cmd_tbl *cmdtp, int flag,
int argc, char *const argv[])
{
int id;
char *endp;
u16 var_name16[9];
efi_guid_t guid;
u16 *label;
struct efi_device_path *file_path = NULL;
struct efi_device_path *fp_free = NULL;
struct efi_device_path *final_fp = NULL;
struct efi_device_path *initrd_dp = NULL;
struct efi_load_option lo;
void *data = NULL;
efi_uintn_t size;
efi_uintn_t fp_size = 0;
efi_status_t ret;
int r = CMD_RET_SUCCESS;
guid = efi_global_variable_guid;
/* attributes */
lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */
lo.optional_data = NULL;
lo.label = NULL;
argc--;
argv++; /* 'add' */
for (; argc > 0; argc--, argv++) {
int shortform;
if (*argv[0] != '-' || strlen(argv[0]) != 2) {
r = CMD_RET_USAGE;
goto out;
}
shortform = 0;
switch (argv[0][1]) {
case 'b':
shortform = 1;
/* fallthrough */
case 'B':
if (argc < 5 || lo.label) {
r = CMD_RET_USAGE;
goto out;
}
id = (int)hextoul(argv[1], &endp);
if (*endp != '\0' || id > 0xffff)
return CMD_RET_USAGE;
efi_create_indexed_name(var_name16, sizeof(var_name16),
"Boot", id);
/* label */
label = efi_convert_string(argv[2]);
if (!label)
return CMD_RET_FAILURE;
lo.label = label; /* label will be changed below */
/* file path */
ret = efi_dp_from_name(argv[3], argv[4], argv[5],
NULL, &fp_free);
if (ret != EFI_SUCCESS) {
printf("Cannot create device path for \"%s %s\"\n",
argv[3], argv[4]);
r = CMD_RET_FAILURE;
goto out;
}
if (shortform)
file_path = efi_dp_shorten(fp_free);
if (!file_path)
file_path = fp_free;
fp_size += efi_dp_size(file_path) +
sizeof(struct efi_device_path);
argc -= 5;
argv += 5;
break;
case 'i':
shortform = 1;
/* fallthrough */
case 'I':
if (argc < 3 || initrd_dp) {
r = CMD_RET_USAGE;
goto out;
}
initrd_dp = create_initrd_dp(argv[1], argv[2], argv[3],
shortform);
if (!initrd_dp) {
printf("Cannot add an initrd\n");
r = CMD_RET_FAILURE;
goto out;
}
argc -= 3;
argv += 3;
fp_size += efi_dp_size(initrd_dp) +
sizeof(struct efi_device_path);
break;
case 's':
if (argc < 1 || lo.optional_data) {
r = CMD_RET_USAGE;
goto out;
}
lo.optional_data = (const u8 *)argv[1];
argc -= 1;
argv += 1;
break;
default:
r = CMD_RET_USAGE;
goto out;
}
}
if (!file_path) {
printf("Missing binary\n");
r = CMD_RET_USAGE;
goto out;
}
final_fp = efi_dp_concat(file_path, initrd_dp);
if (!final_fp) {
printf("Cannot create final device path\n");
r = CMD_RET_FAILURE;
goto out;
}
lo.file_path = final_fp;
lo.file_path_length = fp_size;
size = efi_serialize_load_option(&lo, (u8 **)&data);
if (!size) {
r = CMD_RET_FAILURE;
goto out;
}
ret = efi_set_variable_int(var_name16, &guid,
EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
size, data, false);
if (ret != EFI_SUCCESS) {
printf("Cannot set %ls\n", var_name16);
r = CMD_RET_FAILURE;
}
out:
free(data);
efi_free_pool(final_fp);
efi_free_pool(initrd_dp);
efi_free_pool(fp_free);
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;
u16 var_name16[9];
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)hextoul(argv[1], &endp);
if (*endp != '\0' || id > 0xffff)
return CMD_RET_FAILURE;
efi_create_indexed_name(var_name16, sizeof(var_name16),
"Boot", id);
ret = efi_set_variable_int(var_name16, &guid, 0, 0, NULL,
false);
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_device_path *initrd_path = NULL;
struct efi_load_option lo;
efi_status_t ret;
ret = efi_deserialize_load_option(&lo, data, size);
if (ret != EFI_SUCCESS) {
printf("%ls: invalid load option\n", varname16);
return;
}
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: %ls\n", lo.label);
printf(" file_path: %pD\n", lo.file_path);
initrd_path = efi_dp_from_lo(&lo, &efi_lf2_initrd_guid);
if (initrd_path) {
printf(" initrd_path: %pD\n", initrd_path);
efi_free_pool(initrd_path);
}
printf(" data:\n");
print_hex_dump(" ", DUMP_PREFIX_OFFSET, 16, 1,
lo.optional_data, *size, true);
}
/**
* 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_get_variable_int(varname16, &efi_global_variable_guid,
NULL, &size, NULL, NULL);
if (ret == EFI_BUFFER_TOO_SMALL) {
data = malloc(size);
if (!data) {
printf("ERROR: Out of memory\n");
return;
}
ret = efi_get_variable_int(varname16, &efi_global_variable_guid,
NULL, &size, data, NULL);
if (ret == EFI_SUCCESS)
show_efi_boot_opt_data(varname16, data, &size);
free(data);
}
}
/**