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cmd: efidebug: add "test bootmgr" sub-command

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This sub-command will be used to test image authentication,
in particular, a case where efi_load_image() failed with
EFI_SECURITY_VIOLATION but we still want to try efi_start_image().
We won't run such a case under normal bootmgr because it simply
refuses to call efi_start_image() if anything but EFI_SUCCESS
is returned when loading an image.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
This commit is contained in:
AKASHI Takahiro 2020-04-14 11:51:48 +09:00 committed by Heinrich Schuchardt
parent e50e2878b2
commit 525fc06744
1 changed files with 77 additions and 1 deletions
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78
cmd/efidebug.c
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@ -1089,6 +1089,78 @@ static int do_efi_boot_opt(cmd_tbl_t *cmdtp, int flag,
return cp->cmd(cmdtp, flag, argc, argv);
}
/**
* do_efi_test_bootmgr() - run simple bootmgr for test
*
* @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 "test bootmgr" sub-command.
* Run simple bootmgr for test.
*
* efidebug test bootmgr
*/
static int do_efi_test_bootmgr(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
efi_handle_t image;
efi_uintn_t exit_data_size = 0;
u16 *exit_data = NULL;
efi_status_t ret;
ret = efi_bootmgr_load(&image);
printf("efi_bootmgr_load() returned: %ld\n", ret & ~EFI_ERROR_MASK);
/* We call efi_start_image() even if error for test purpose. */
ret = EFI_CALL(efi_start_image(image, &exit_data_size, &exit_data));
printf("efi_start_image() returned: %ld\n", ret & ~EFI_ERROR_MASK);
if (ret && exit_data)
efi_free_pool(exit_data);
efi_restore_gd();
return CMD_RET_SUCCESS;
}
static cmd_tbl_t cmd_efidebug_test_sub[] = {
U_BOOT_CMD_MKENT(bootmgr, CONFIG_SYS_MAXARGS, 1, do_efi_test_bootmgr,
"", ""),
};
/**
* do_efi_test() - 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 "test" sub-command.
*/
static int do_efi_test(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_test_sub,
ARRAY_SIZE(cmd_efidebug_test_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, "", ""),
U_BOOT_CMD_MKENT(devices, CONFIG_SYS_MAXARGS, 1, do_efi_show_devices,
@ -1103,6 +1175,8 @@ static cmd_tbl_t cmd_efidebug_sub[] = {
"", ""),
U_BOOT_CMD_MKENT(tables, CONFIG_SYS_MAXARGS, 1, do_efi_show_tables,
"", ""),
U_BOOT_CMD_MKENT(test, CONFIG_SYS_MAXARGS, 1, do_efi_test,
"", ""),
};
/**
@ -1172,7 +1246,9 @@ static char efidebug_help_text[] =
"efidebug memmap\n"
" - show UEFI memory map\n"
"efidebug tables\n"
" - show UEFI configuration tables\n";
" - show UEFI configuration tables\n"
"efidebug test bootmgr\n"
" - run simple bootmgr for test\n";
#endif
U_BOOT_CMD(