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https://github.com/AsahiLinux/u-boot
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62045b0eb4
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(). Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Alexander Graf <agraf@suse.de>
141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_crc32
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*
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* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* This unit test checks the CalculateCrc32 bootservice and checks the
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* headers of the system table, the boot services tablle, and the runtime
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* services table before and after ExitBootServices().
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*/
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#include <efi_selftest.h>
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const struct efi_system_table *st;
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efi_status_t (EFIAPI *bs_crc32)(const void *data, efi_uintn_t data_size,
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u32 *crc32);
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static int check_table(const void *table)
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{
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efi_status_t ret;
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u32 crc32, res;
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/* Casting from const to not const */
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struct efi_table_hdr *hdr = (struct efi_table_hdr *)table;
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if (!hdr->signature) {
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efi_st_error("Missing header signature\n");
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return EFI_ST_FAILURE;
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}
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if (!hdr->revision) {
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efi_st_error("Missing header revision\n");
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return EFI_ST_FAILURE;
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}
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if (hdr->headersize <= sizeof(struct efi_table_hdr)) {
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efi_st_error("Incorrect headersize value\n");
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return EFI_ST_FAILURE;
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}
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if (hdr->reserved) {
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efi_st_error("Reserved header field is not zero\n");
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return EFI_ST_FAILURE;
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}
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crc32 = hdr->crc32;
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/*
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* Setting the crc32 of the 'const' table to zero is easier than
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* copying
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*/
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hdr->crc32 = 0;
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ret = bs_crc32(table, hdr->headersize, &res);
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/* Reset table crc32 so it stays constant */
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hdr->crc32 = crc32;
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if (ret != EFI_ST_SUCCESS) {
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efi_st_error("CalculateCrc32 failed\n");
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return EFI_ST_FAILURE;
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}
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if (res != crc32) {
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efi_st_error("Incorrect CRC32\n");
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// return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Setup unit test.
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*
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* Check that CalculateCrc32 is working correctly.
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* Check tables before ExitBootServices().
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* @return: EFI_ST_SUCCESS for success
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*/
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static int setup(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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efi_status_t ret;
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u32 res;
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st = systable;
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bs_crc32 = systable->boottime->calculate_crc32;
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/* Check that CalculateCrc32 is working */
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ret = bs_crc32("U-Boot", 6, &res);
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if (ret != EFI_ST_SUCCESS) {
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efi_st_error("CalculateCrc32 failed\n");
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return EFI_ST_FAILURE;
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}
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if (res != 0x134b0db4) {
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efi_st_error("Incorrect CRC32\n");
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return EFI_ST_FAILURE;
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}
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/* Check tables before ExitBootServices() */
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if (check_table(st) != EFI_ST_SUCCESS) {
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efi_st_error("Checking system table\n");
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return EFI_ST_FAILURE;
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}
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if (check_table(st->boottime) != EFI_ST_SUCCESS) {
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efi_st_error("Checking boottime table\n");
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return EFI_ST_FAILURE;
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}
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if (check_table(st->runtime) != EFI_ST_SUCCESS) {
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efi_st_error("Checking runtime table\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* Execute unit test
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*
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* Check tables after ExitBootServices()
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*
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* @return: EFI_ST_SUCCESS for success
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*/
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static int execute(void)
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{
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if (check_table(st) != EFI_ST_SUCCESS) {
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efi_st_error("Checking system table\n");
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return EFI_ST_FAILURE;
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}
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if (check_table(st->runtime) != EFI_ST_SUCCESS) {
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efi_st_error("Checking runtime table\n");
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return EFI_ST_FAILURE;
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}
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/*
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* We cannot call SetVirtualAddressMap() and recheck the runtime
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* table afterwards because this would invalidate the addresses of the
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* unit tests.
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*/
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return EFI_ST_SUCCESS;
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}
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EFI_UNIT_TEST(crc32) = {
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.name = "crc32",
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.phase = EFI_SETUP_BEFORE_BOOTTIME_EXIT,
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.setup = setup,
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.execute = execute,
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};
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