lib/efi_selftest/efi_selftest_startimage_exit.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * efi_selftest_start_image
   4  *
   5  * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
   6  *
   7  * This test checks the StartImage boot service.
   8  * The efi_selftest_miniapp_exit.efi application is loaded into memory
   9  * and started.
  10  */
  11
  12 #include <efi_selftest.h>
  13 /* Include containing the miniapp.efi application */
  14 #include "efi_miniapp_file_image_exit.h"
  15
  16 /* Block size of compressed disk image */
  17 #define COMPRESSED_DISK_IMAGE_BLOCK_SIZE 8
  18
  19 /* Binary logarithm of the block size */
  20 #define LB_BLOCK_SIZE 9
  21
  22 static efi_handle_t image_handle;
  23 static struct efi_boot_services *boottime;
  24
  25 /* One 8 byte block of the compressed disk image */
  26 struct line {
  27         size_t addr;
  28         char *line;
  29 };
  30
  31 /* Compressed file image */
  32 struct compressed_file_image {
  33         size_t length;
  34         struct line lines[];
  35 };
  36
  37 static struct compressed_file_image img = EFI_ST_DISK_IMG;
  38
  39 /* Decompressed file image */
  40 static u8 *image;
  41
  42 /*
  43  * Decompress the disk image.
  44  *
  45  * @image       decompressed disk image
  46  * @return      status code
  47  */
  48 static efi_status_t decompress(u8 **image)
  49 {
  50         u8 *buf;
  51         size_t i;
  52         size_t addr;
  53         size_t len;
  54         efi_status_t ret;
  55
  56         ret = boottime->allocate_pool(EFI_LOADER_DATA, img.length,
  57                                       (void **)&buf);
  58         if (ret != EFI_SUCCESS) {
  59                 efi_st_error("Out of memory\n");
  60                 return ret;
  61         }
  62         boottime->set_mem(buf, img.length, 0);
  63
  64         for (i = 0; ; ++i) {
  65                 if (!img.lines[i].line)
  66                         break;
  67                 addr = img.lines[i].addr;
  68                 len = COMPRESSED_DISK_IMAGE_BLOCK_SIZE;
  69                 if (addr + len > img.length)
  70                         len = img.length - addr;
  71                 boottime->copy_mem(buf + addr, img.lines[i].line, len);
  72         }
  73         *image = buf;
  74         return ret;
  75 }
  76
  77 /*
  78  * Setup unit test.
  79  *
  80  * @handle:     handle of the loaded image
  81  * @systable:   system table
  82  * @return:     EFI_ST_SUCCESS for success
  83  */
  84 static int setup(const efi_handle_t handle,
  85                  const struct efi_system_table *systable)
  86 {
  87         image_handle = handle;
  88         boottime = systable->boottime;
  89
  90         /* Load the application image into memory */
  91         decompress(&image);
  92
  93         return EFI_ST_SUCCESS;
  94 }
  95
  96 /*
  97  * Tear down unit test.
  98  *
  99  * @return:     EFI_ST_SUCCESS for success
 100  */
 101 static int teardown(void)
 102 {
 103         efi_status_t r = EFI_ST_SUCCESS;
 104
 105         if (image) {
 106                 r = boottime->free_pool(image);
 107                 if (r != EFI_SUCCESS) {
 108                         efi_st_error("Failed to free image\n");
 109                         return EFI_ST_FAILURE;
 110                 }
 111         }
 112         return r;
 113 }
 114
 115 /*
 116  * Execute unit test.
 117  *
 118  * Load and start the application image.
 119  *
 120  * @return:     EFI_ST_SUCCESS for success
 121  */
 122 static int execute(void)
 123 {
 124         efi_status_t ret;
 125         efi_handle_t handle;
 126
 127         ret = boottime->load_image(false, image_handle, NULL, image,
 128                                    img.length, &handle);
 129         if (ret != EFI_SUCCESS) {
 130                 efi_st_error("Failed to load image\n");
 131                 return EFI_ST_FAILURE;
 132         }
 133         ret = boottime->start_image(handle, NULL, NULL);
 134         if (ret != EFI_UNSUPPORTED) {
 135                 efi_st_error("Wrong return value from application\n");
 136                 return EFI_ST_FAILURE;
 137         }
 138
 139         return EFI_ST_SUCCESS;
 140 }
 141
 142 EFI_UNIT_TEST(startimage_exit) = {
 143         .name = "start image exit",
 144         .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
 145         .setup = setup,
 146         .execute = execute,
 147         .teardown = teardown,
 148 };