mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 15:14:43 +00:00
cmd: add efidebug command
Currently, there is no easy way to add or modify UEFI variables. In particular, bootmgr supports BootOrder/BootXXXX variables, it is quite hard to define them as u-boot variables because they are represented in a complicated and encoded format. The new command, efidebug, helps address these issues and give us more friendly interfaces: * efidebug boot add: add BootXXXX variable * efidebug boot rm: remove BootXXXX variable * efidebug boot dump: display all BootXXXX variables * efidebug boot next: set BootNext variable * efidebug boot order: set/display a boot order (BootOrder) Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
parent
454568b4f0
commit
59df7e7e77
4 changed files with 599 additions and 0 deletions
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@ -471,6 +471,7 @@ F: lib/efi*/
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F: test/py/tests/test_efi*
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F: test/unicode_ut.c
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F: cmd/bootefi.c
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F: cmd/efidebug.c
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F: cmd/nvedit_efi.c
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F: tools/file2include.c
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10
cmd/Kconfig
10
cmd/Kconfig
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@ -1407,6 +1407,16 @@ config CMD_DISPLAY
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displayed on a simple board-specific display. Implement
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display_putc() to use it.
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config CMD_EFIDEBUG
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bool "efidebug - display/configure UEFI environment"
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depends on EFI_LOADER
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default n
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help
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Enable the 'efidebug' command which provides a subset of UEFI
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shell utility with simplified functionality. It will be useful
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particularly for managing boot parameters as well as examining
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various EFI status for debugging.
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config CMD_LED
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bool "led"
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depends on LED
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@ -51,6 +51,7 @@ obj-$(CONFIG_CMD_ECHO) += echo.o
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obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
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obj-$(CONFIG_CMD_EEPROM) += eeprom.o
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obj-$(CONFIG_EFI_STUB) += efi.o
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obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
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obj-$(CONFIG_CMD_ELF) += elf.o
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obj-$(CONFIG_HUSH_PARSER) += exit.o
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obj-$(CONFIG_CMD_EXT4) += ext4.o
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587
cmd/efidebug.c
Normal file
587
cmd/efidebug.c
Normal file
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@ -0,0 +1,587 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* UEFI Shell-like command
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*
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* Copyright (c) 2018 AKASHI Takahiro, Linaro Limited
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*/
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#include <charset.h>
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#include <common.h>
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#include <command.h>
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#include <efi_loader.h>
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#include <environment.h>
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#include <exports.h>
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#include <malloc.h>
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#include <search.h>
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#include <linux/ctype.h>
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#define RT systab.runtime
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/**
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* do_efi_boot_add() - set UEFI load option
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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* Return: CMD_RET_SUCCESS on success,
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* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
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*
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* Implement efidebug "boot add" sub-command.
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* Create or change UEFI load option.
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* - boot add <id> <label> <interface> <devnum>[:<part>] <file> <options>
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*/
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static int do_efi_boot_add(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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int id;
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char *endp;
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char var_name[9];
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u16 var_name16[9], *p;
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efi_guid_t guid;
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size_t label_len, label_len16;
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u16 *label;
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struct efi_device_path *device_path = NULL, *file_path = NULL;
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struct efi_load_option lo;
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void *data = NULL;
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efi_uintn_t size;
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int ret;
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if (argc < 6 || argc > 7)
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return CMD_RET_USAGE;
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id = (int)simple_strtoul(argv[1], &endp, 16);
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if (*endp != '\0' || id > 0xffff)
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return CMD_RET_FAILURE;
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sprintf(var_name, "Boot%04X", id);
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p = var_name16;
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utf8_utf16_strncpy(&p, var_name, 9);
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guid = efi_global_variable_guid;
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/* attributes */
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lo.attributes = LOAD_OPTION_ACTIVE; /* always ACTIVE */
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/* label */
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label_len = strlen(argv[2]);
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label_len16 = utf8_utf16_strnlen(argv[2], label_len);
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label = malloc((label_len16 + 1) * sizeof(u16));
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if (!label)
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return CMD_RET_FAILURE;
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lo.label = label; /* label will be changed below */
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utf8_utf16_strncpy(&label, argv[2], label_len);
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/* file path */
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ret = efi_dp_from_name(argv[3], argv[4], argv[5], &device_path,
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&file_path);
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if (ret != EFI_SUCCESS) {
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printf("Cannot create device path for \"%s %s\"\n",
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argv[3], argv[4]);
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ret = CMD_RET_FAILURE;
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goto out;
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}
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lo.file_path = file_path;
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lo.file_path_length = efi_dp_size(file_path)
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+ sizeof(struct efi_device_path); /* for END */
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/* optional data */
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lo.optional_data = (u8 *)(argc == 6 ? "" : argv[6]);
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size = efi_serialize_load_option(&lo, (u8 **)&data);
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if (!size) {
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ret = CMD_RET_FAILURE;
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goto out;
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}
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ret = EFI_CALL(RT->set_variable(var_name16, &guid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS |
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EFI_VARIABLE_RUNTIME_ACCESS,
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size, data));
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ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
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out:
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free(data);
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efi_free_pool(device_path);
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efi_free_pool(file_path);
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free(lo.label);
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return ret;
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}
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/**
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* do_efi_boot_rm() - delete UEFI load options
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*
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* Implement efidebug "boot rm" sub-command.
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* Delete UEFI load options.
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* - boot rm <id> ...
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*/
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static int do_efi_boot_rm(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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efi_guid_t guid;
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int id, i;
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char *endp;
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char var_name[9];
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u16 var_name16[9];
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efi_status_t ret;
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if (argc == 1)
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return CMD_RET_USAGE;
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guid = efi_global_variable_guid;
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for (i = 1; i < argc; i++, argv++) {
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id = (int)simple_strtoul(argv[1], &endp, 16);
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if (*endp != '\0' || id > 0xffff)
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return CMD_RET_FAILURE;
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sprintf(var_name, "Boot%04X", id);
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utf8_utf16_strncpy((u16 **)&var_name16, var_name, 9);
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ret = EFI_CALL(RT->set_variable(var_name16, &guid, 0, 0, NULL));
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if (ret) {
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printf("cannot remove Boot%04X", id);
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return CMD_RET_FAILURE;
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}
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}
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return CMD_RET_SUCCESS;
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}
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/**
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* show_efi_boot_opt_data() - dump UEFI load option
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*
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* @id: Load option number
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* @data: Value of UEFI load option variable
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*
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* Decode the value of UEFI load option variable and print information.
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*/
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static void show_efi_boot_opt_data(int id, void *data)
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{
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struct efi_load_option lo;
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char *label, *p;
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size_t label_len16, label_len;
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u16 *dp_str;
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efi_deserialize_load_option(&lo, data);
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label_len16 = u16_strlen(lo.label);
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label_len = utf16_utf8_strnlen(lo.label, label_len16);
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label = malloc(label_len + 1);
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if (!label)
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return;
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p = label;
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utf16_utf8_strncpy(&p, lo.label, label_len16);
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printf("Boot%04X:\n", id);
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printf("\tattributes: %c%c%c (0x%08x)\n",
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/* ACTIVE */
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lo.attributes & LOAD_OPTION_ACTIVE ? 'A' : '-',
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/* FORCE RECONNECT */
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lo.attributes & LOAD_OPTION_FORCE_RECONNECT ? 'R' : '-',
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/* HIDDEN */
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lo.attributes & LOAD_OPTION_HIDDEN ? 'H' : '-',
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lo.attributes);
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printf("\tlabel: %s\n", label);
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dp_str = efi_dp_str(lo.file_path);
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printf("\tfile_path: %ls\n", dp_str);
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efi_free_pool(dp_str);
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printf("\tdata: %s\n", lo.optional_data);
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free(label);
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}
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/**
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* show_efi_boot_opt() - dump UEFI load option
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*
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* @id: Load option number
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*
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* Dump information defined by UEFI load option.
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*/
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static void show_efi_boot_opt(int id)
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{
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char var_name[9];
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u16 var_name16[9], *p;
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efi_guid_t guid;
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void *data = NULL;
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efi_uintn_t size;
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int ret;
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sprintf(var_name, "Boot%04X", id);
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p = var_name16;
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utf8_utf16_strncpy(&p, var_name, 9);
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guid = efi_global_variable_guid;
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size = 0;
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ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size, NULL));
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if (ret == (int)EFI_BUFFER_TOO_SMALL) {
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data = malloc(size);
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ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
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data));
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}
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if (ret == EFI_SUCCESS)
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show_efi_boot_opt_data(id, data);
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else if (ret == EFI_NOT_FOUND)
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printf("Boot%04X: not found\n", id);
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free(data);
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}
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/**
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* show_efi_boot_dump() - dump all UEFI load options
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*
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* @cmdtp: Command table
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* @flag: Command flag
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* @argc: Number of arguments
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* @argv: Argument array
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*
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* Implement efidebug "boot dump" sub-command.
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* Dump information of all UEFI load options defined.
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* - boot dump
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*/
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static int do_efi_boot_dump(cmd_tbl_t *cmdtp, int flag,
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int argc, char * const argv[])
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{
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char regex[256];
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char * const regexlist[] = {regex};
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char *variables = NULL, *boot, *value;
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int len;
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int id;
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if (argc > 1)
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return CMD_RET_USAGE;
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snprintf(regex, 256, "efi_.*-.*-.*-.*-.*_Boot[0-9A-F]+");
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/* TODO: use GetNextVariableName? */
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len = hexport_r(&env_htab, '\n', H_MATCH_REGEX | H_MATCH_KEY,
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&variables, 0, 1, regexlist);
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if (!len)
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return CMD_RET_SUCCESS;
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if (len < 0)
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return CMD_RET_FAILURE;
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boot = variables;
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while (*boot) {
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value = strstr(boot, "Boot") + 4;
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id = (int)simple_strtoul(value, NULL, 16);
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show_efi_boot_opt(id);
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boot = strchr(boot, '\n');
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if (!*boot)
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break;
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boot++;
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}
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free(variables);
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return CMD_RET_SUCCESS;
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}
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/**
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* show_efi_boot_order() - show order of UEFI load options
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*
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* Return: CMD_RET_SUCCESS on success, CMD_RET_RET_FAILURE on failure
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*
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* Show order of UEFI load options defined by BootOrder variable.
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*/
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static int show_efi_boot_order(void)
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{
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efi_guid_t guid;
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u16 *bootorder = NULL;
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efi_uintn_t size;
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int num, i;
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char var_name[9];
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u16 var_name16[9], *p16;
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void *data;
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struct efi_load_option lo;
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char *label, *p;
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size_t label_len16, label_len;
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efi_status_t ret;
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guid = efi_global_variable_guid;
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size = 0;
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ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL, &size,
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NULL));
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if (ret == EFI_BUFFER_TOO_SMALL) {
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bootorder = malloc(size);
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ret = EFI_CALL(RT->get_variable(L"BootOrder", &guid, NULL,
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&size, bootorder));
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}
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if (ret == EFI_NOT_FOUND) {
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printf("BootOrder not defined\n");
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ret = CMD_RET_SUCCESS;
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goto out;
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} else if (ret != EFI_SUCCESS) {
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ret = CMD_RET_FAILURE;
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goto out;
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}
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num = size / sizeof(u16);
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for (i = 0; i < num; i++) {
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sprintf(var_name, "Boot%04X", bootorder[i]);
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p16 = var_name16;
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utf8_utf16_strncpy(&p16, var_name, 9);
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size = 0;
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ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
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NULL));
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if (ret != EFI_BUFFER_TOO_SMALL) {
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printf("%2d: Boot%04X: (not defined)\n",
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i + 1, bootorder[i]);
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continue;
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}
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data = malloc(size);
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if (!data) {
|
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ret = CMD_RET_FAILURE;
|
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goto out;
|
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}
|
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ret = EFI_CALL(RT->get_variable(var_name16, &guid, NULL, &size,
|
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data));
|
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if (ret != EFI_SUCCESS) {
|
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free(data);
|
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ret = CMD_RET_FAILURE;
|
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goto out;
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}
|
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|
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efi_deserialize_load_option(&lo, data);
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|
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label_len16 = u16_strlen(lo.label);
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label_len = utf16_utf8_strnlen(lo.label, label_len16);
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label = malloc(label_len + 1);
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if (!label) {
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free(data);
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ret = CMD_RET_FAILURE;
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goto out;
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}
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p = label;
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utf16_utf8_strncpy(&p, lo.label, label_len16);
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printf("%2d: Boot%04X: %s\n", i + 1, bootorder[i], label);
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free(label);
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free(data);
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}
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out:
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free(bootorder);
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|
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return ret;
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}
|
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|
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/**
|
||||
* do_efi_boot_next() - manage UEFI BootNext variable
|
||||
*
|
||||
* @cmdtp: Command table
|
||||
* @flag: Command flag
|
||||
* @argc: Number of arguments
|
||||
* @argv: Argument array
|
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* Return: CMD_RET_SUCCESS on success,
|
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* CMD_RET_USAGE or CMD_RET_RET_FAILURE on failure
|
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*
|
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* Implement efidebug "boot next" sub-command.
|
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* Set BootNext variable.
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* - boot next <id>
|
||||
*/
|
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static int do_efi_boot_next(cmd_tbl_t *cmdtp, int flag,
|
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int argc, char * const argv[])
|
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{
|
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u16 bootnext;
|
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efi_uintn_t size;
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char *endp;
|
||||
efi_guid_t guid;
|
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efi_status_t ret;
|
||||
|
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if (argc != 2)
|
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return CMD_RET_USAGE;
|
||||
|
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bootnext = (u16)simple_strtoul(argv[1], &endp, 16);
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if (*endp != '\0' || bootnext > 0xffff) {
|
||||
printf("invalid value: %s\n", argv[1]);
|
||||
ret = CMD_RET_FAILURE;
|
||||
goto out;
|
||||
}
|
||||
|
||||
guid = efi_global_variable_guid;
|
||||
size = sizeof(u16);
|
||||
ret = EFI_CALL(RT->set_variable(L"BootNext", &guid,
|
||||
EFI_VARIABLE_BOOTSERVICE_ACCESS |
|
||||
EFI_VARIABLE_RUNTIME_ACCESS,
|
||||
size, &bootnext));
|
||||
ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* do_efi_boot_order() - manage UEFI BootOrder variable
|
||||
*
|
||||
* @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 order" sub-command.
|
||||
* Show order of UEFI load options, or change it in BootOrder variable.
|
||||
* - boot order [<id> ...]
|
||||
*/
|
||||
static int do_efi_boot_order(cmd_tbl_t *cmdtp, int flag,
|
||||
int argc, char * const argv[])
|
||||
{
|
||||
u16 *bootorder = NULL;
|
||||
efi_uintn_t size;
|
||||
int id, i;
|
||||
char *endp;
|
||||
efi_guid_t guid;
|
||||
efi_status_t ret;
|
||||
|
||||
if (argc == 1)
|
||||
return show_efi_boot_order();
|
||||
|
||||
argc--;
|
||||
argv++;
|
||||
|
||||
size = argc * sizeof(u16);
|
||||
bootorder = malloc(size);
|
||||
if (!bootorder)
|
||||
return CMD_RET_FAILURE;
|
||||
|
||||
for (i = 0; i < argc; i++) {
|
||||
id = (int)simple_strtoul(argv[i], &endp, 16);
|
||||
if (*endp != '\0' || id > 0xffff) {
|
||||
printf("invalid value: %s\n", argv[i]);
|
||||
ret = CMD_RET_FAILURE;
|
||||
goto out;
|
||||
}
|
||||
|
||||
bootorder[i] = (u16)id;
|
||||
}
|
||||
|
||||
guid = efi_global_variable_guid;
|
||||
ret = EFI_CALL(RT->set_variable(L"BootOrder", &guid,
|
||||
EFI_VARIABLE_BOOTSERVICE_ACCESS |
|
||||
EFI_VARIABLE_RUNTIME_ACCESS,
|
||||
size, bootorder));
|
||||
ret = (ret == EFI_SUCCESS ? CMD_RET_SUCCESS : CMD_RET_FAILURE);
|
||||
out:
|
||||
free(bootorder);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static cmd_tbl_t cmd_efidebug_boot_sub[] = {
|
||||
U_BOOT_CMD_MKENT(add, CONFIG_SYS_MAXARGS, 1, do_efi_boot_add, "", ""),
|
||||
U_BOOT_CMD_MKENT(rm, CONFIG_SYS_MAXARGS, 1, do_efi_boot_rm, "", ""),
|
||||
U_BOOT_CMD_MKENT(dump, CONFIG_SYS_MAXARGS, 1, do_efi_boot_dump, "", ""),
|
||||
U_BOOT_CMD_MKENT(next, CONFIG_SYS_MAXARGS, 1, do_efi_boot_next, "", ""),
|
||||
U_BOOT_CMD_MKENT(order, CONFIG_SYS_MAXARGS, 1, do_efi_boot_order,
|
||||
"", ""),
|
||||
};
|
||||
|
||||
/**
|
||||
* do_efi_boot_opt() - manage UEFI load options
|
||||
*
|
||||
* @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" sub-command.
|
||||
* See above for details of sub-commands.
|
||||
*/
|
||||
static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
|
||||
int argc, char * const argv[])
|
||||
{
|
||||
cmd_tbl_t *cp;
|
||||
|
||||
if (argc < 2)
|
||||
return CMD_RET_USAGE;
|
||||
|
||||
argc--; argv++;
|
||||
|
||||
cp = find_cmd_tbl(argv[0], cmd_efidebug_boot_sub,
|
||||
ARRAY_SIZE(cmd_efidebug_boot_sub));
|
||||
if (!cp)
|
||||
return CMD_RET_USAGE;
|
||||
|
||||
return cp->cmd(cmdtp, flag, argc, argv);
|
||||
}
|
||||
|
||||
static cmd_tbl_t cmd_efidebug_sub[] = {
|
||||
U_BOOT_CMD_MKENT(boot, CONFIG_SYS_MAXARGS, 1, do_efi_boot_opt, "", ""),
|
||||
};
|
||||
|
||||
/**
|
||||
* do_efidebug() - display and configure UEFI environment
|
||||
*
|
||||
* @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 command which allows us to display and
|
||||
* configure UEFI environment.
|
||||
* See above for details of sub-commands.
|
||||
*/
|
||||
static int do_efidebug(cmd_tbl_t *cmdtp, int flag,
|
||||
int argc, char * const argv[])
|
||||
{
|
||||
cmd_tbl_t *cp;
|
||||
efi_status_t r;
|
||||
|
||||
if (argc < 2)
|
||||
return CMD_RET_USAGE;
|
||||
|
||||
argc--; argv++;
|
||||
|
||||
/* Initialize UEFI drivers */
|
||||
r = efi_init_obj_list();
|
||||
if (r != EFI_SUCCESS) {
|
||||
printf("Error: Cannot initialize UEFI sub-system, r = %lu\n",
|
||||
r & ~EFI_ERROR_MASK);
|
||||
return CMD_RET_FAILURE;
|
||||
}
|
||||
|
||||
cp = find_cmd_tbl(argv[0], cmd_efidebug_sub,
|
||||
ARRAY_SIZE(cmd_efidebug_sub));
|
||||
if (!cp)
|
||||
return CMD_RET_USAGE;
|
||||
|
||||
return cp->cmd(cmdtp, flag, argc, argv);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SYS_LONGHELP
|
||||
static char efidebug_help_text[] =
|
||||
" - UEFI Shell-like interface to configure UEFI environment\n"
|
||||
"\n"
|
||||
"efidebug boot add <bootid> <label> <interface> <devnum>[:<part>] <file path> [<load options>]\n"
|
||||
" - set UEFI BootXXXX variable\n"
|
||||
" <load options> will be passed to UEFI application\n"
|
||||
"efidebug boot rm <bootid#1> [<bootid#2> [<bootid#3> [...]]]\n"
|
||||
" - delete UEFI BootXXXX variables\n"
|
||||
"efidebug boot dump\n"
|
||||
" - dump all UEFI BootXXXX variables\n"
|
||||
"efidebug boot next <bootid>\n"
|
||||
" - set UEFI BootNext variable\n"
|
||||
"efidebug boot order [<bootid#1> [<bootid#2> [<bootid#3> [...]]]]\n"
|
||||
" - set/show UEFI boot order\n"
|
||||
"\n";
|
||||
#endif
|
||||
|
||||
U_BOOT_CMD(
|
||||
efidebug, 10, 0, do_efidebug,
|
||||
"Configure UEFI environment",
|
||||
efidebug_help_text
|
||||
);
|
Loading…
Reference in a new issue