diff options
| -rw-r--r-- | lib/efi_selftest/Makefile | 1 | ||||
| -rw-r--r-- | lib/efi_selftest/efi_selftest_crc32.c | 141 |
2 files changed, 142 insertions, 0 deletions
diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile index c0fd490..1f3084c 100644 --- a/lib/efi_selftest/Makefile +++ b/lib/efi_selftest/Makefile @@ -16,6 +16,7 @@ efi_selftest_bitblt.o \ efi_selftest_config_table.o \ efi_selftest_controllers.o \ efi_selftest_console.o \ +efi_selftest_crc32.o \ efi_selftest_devicepath.o \ efi_selftest_devicepath_util.o \ efi_selftest_events.o \ diff --git a/lib/efi_selftest/efi_selftest_crc32.c b/lib/efi_selftest/efi_selftest_crc32.c new file mode 100644 index 0000000..8555b8f --- /dev/null +++ b/lib/efi_selftest/efi_selftest_crc32.c @@ -0,0 +1,141 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * efi_selftest_crc32 + * + * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de> + * + * This unit test checks the CalculateCrc32 bootservice and checks the + * headers of the system table, the boot services tablle, and the runtime + * services table before and after ExitBootServices(). + */ + +#include <efi_selftest.h> + +const struct efi_system_table *st; +efi_status_t (EFIAPI *bs_crc32)(const void *data, efi_uintn_t data_size, + u32 *crc32); + +static int check_table(const void *table) +{ + efi_status_t ret; + u32 crc32, res; + /* Casting from const to not const */ + struct efi_table_hdr *hdr = (struct efi_table_hdr *)table; + + if (!hdr->signature) { + efi_st_error("Missing header signature\n"); + return EFI_ST_FAILURE; + } + if (!hdr->revision) { + efi_st_error("Missing header revision\n"); + return EFI_ST_FAILURE; + } + if (hdr->headersize <= sizeof(struct efi_table_hdr)) { + efi_st_error("Incorrect headersize value\n"); + return EFI_ST_FAILURE; + } + if (hdr->reserved) { + efi_st_error("Reserved header field is not zero\n"); + return EFI_ST_FAILURE; + } + + crc32 = hdr->crc32; + /* + * Setting the crc32 of the 'const' table to zero is easier than + * copying + */ + hdr->crc32 = 0; + ret = bs_crc32(table, hdr->headersize, &res); + /* Reset table crc32 so it stays constant */ + hdr->crc32 = crc32; + if (ret != EFI_ST_SUCCESS) { + efi_st_error("CalculateCrc32 failed\n"); + return EFI_ST_FAILURE; + } + if (res != crc32) { + efi_st_error("Incorrect CRC32\n"); + // return EFI_ST_FAILURE; + } + return EFI_ST_SUCCESS; +} + +/* + * Setup unit test. + * + * Check that CalculateCrc32 is working correctly. + * Check tables before ExitBootServices(). + * + * @handle: handle of the loaded image + * @systable: system table + * @return: EFI_ST_SUCCESS for success + */ +static int setup(const efi_handle_t handle, + const struct efi_system_table *systable) +{ + efi_status_t ret; + u32 res; + + st = systable; + bs_crc32 = systable->boottime->calculate_crc32; + + /* Check that CalculateCrc32 is working */ + ret = bs_crc32("U-Boot", 6, &res); + if (ret != EFI_ST_SUCCESS) { + efi_st_error("CalculateCrc32 failed\n"); + return EFI_ST_FAILURE; + } + if (res != 0x134b0db4) { + efi_st_error("Incorrect CRC32\n"); + return EFI_ST_FAILURE; + } + + /* Check tables before ExitBootServices() */ + if (check_table(st) != EFI_ST_SUCCESS) { + efi_st_error("Checking system table\n"); + return EFI_ST_FAILURE; + } + if (check_table(st->boottime) != EFI_ST_SUCCESS) { + efi_st_error("Checking boottime table\n"); + return EFI_ST_FAILURE; + } + if (check_table(st->runtime) != EFI_ST_SUCCESS) { + efi_st_error("Checking runtime table\n"); + return EFI_ST_FAILURE; + } + + return EFI_ST_SUCCESS; +} + +/* + * Execute unit test + * + * Check tables after ExitBootServices() + * + * @return: EFI_ST_SUCCESS for success + */ +static int execute(void) +{ + if (check_table(st) != EFI_ST_SUCCESS) { + efi_st_error("Checking system table\n"); + return EFI_ST_FAILURE; + } + if (check_table(st->runtime) != EFI_ST_SUCCESS) { + efi_st_error("Checking runtime table\n"); + return EFI_ST_FAILURE; + } + + /* + * We cannot call SetVirtualAddressMap() and recheck the runtime + * table afterwards because this would invalidate the addresses of the + * unit tests. + */ + + return EFI_ST_SUCCESS; +} + +EFI_UNIT_TEST(crc32) = { + .name = "crc32", + .phase = EFI_SETUP_BEFORE_BOOTTIME_EXIT, + .setup = setup, + .execute = execute, +}; |