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>lime2-spi
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// 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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