tools/default_image.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2008 Semihalf
   4  *
   5  * (C) Copyright 2000-2004
   6  * DENX Software Engineering
   7  * Wolfgang Denk, [email protected]
   8  *
   9  * Updated-by: Prafulla Wadaskar <[email protected]>
  10  *              default_image specific code abstracted from mkimage.c
  11  *              some functions added to address abstraction
  12  *
  13  * All rights reserved.
  14  */
  15
  16 #include "imagetool.h"
  17 #include "mkimage.h"
  18
  19 #include <image.h>
  20 #include <tee/optee.h>
  21 #include <u-boot/crc.h>
  22 #include <imximage.h>
  23
  24 static struct legacy_img_hdr header;
  25
  26 static int image_check_image_types(uint8_t type)
  27 {
  28         if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
  29             (type == IH_TYPE_KERNEL_NOLOAD) || (type == IH_TYPE_FIRMWARE_IVT) ||
  30             (type == IH_TYPE_FDT_LEGACY))
  31                 return EXIT_SUCCESS;
  32         else
  33                 return EXIT_FAILURE;
  34 }
  35
  36 static int image_check_params(struct image_tool_params *params)
  37 {
  38         return  ((params->dflag && (params->fflag || params->lflag)) ||
  39                 (params->fflag && (params->dflag || params->lflag)) ||
  40                 (params->lflag && (params->dflag || params->fflag)));
  41 }
  42
  43 static void image_print_header(const void *ptr, struct image_tool_params *params)
  44 {
  45         image_print_contents(ptr);
  46 }
  47
  48 static int image_verify_header(unsigned char *ptr, int image_size,
  49                         struct image_tool_params *params)
  50 {
  51         uint32_t len;
  52         const unsigned char *data;
  53         uint32_t checksum;
  54         struct legacy_img_hdr header;
  55         struct legacy_img_hdr *hdr = &header;
  56
  57         if (image_size < sizeof(struct legacy_img_hdr)) {
  58                 debug("%s: Bad image size: \"%s\" is no valid image\n",
  59                       params->cmdname, params->imagefile);
  60                 return -FDT_ERR_BADSTRUCTURE;
  61         }
  62
  63         /*
  64          * create copy of header so that we can blank out the
  65          * checksum field for checking - this can't be done
  66          * on the PROT_READ mapped data.
  67          */
  68         memcpy(hdr, ptr, sizeof(struct legacy_img_hdr));
  69
  70         if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
  71                 debug("%s: Bad Magic Number: \"%s\" is no valid image\n",
  72                       params->cmdname, params->imagefile);
  73                 return -FDT_ERR_BADMAGIC;
  74         }
  75
  76         data = (const unsigned char *)hdr;
  77         len  = sizeof(struct legacy_img_hdr);
  78
  79         checksum = be32_to_cpu(hdr->ih_hcrc);
  80         hdr->ih_hcrc = cpu_to_be32(0);  /* clear for re-calculation */
  81
  82         if (crc32(0, data, len) != checksum) {
  83                 debug("%s: ERROR: \"%s\" has bad header checksum!\n",
  84                       params->cmdname, params->imagefile);
  85                 return -FDT_ERR_BADSTATE;
  86         }
  87
  88         data = (const unsigned char *)ptr + sizeof(struct legacy_img_hdr);
  89         len = image_get_data_size(hdr);
  90
  91         if (image_get_type(hdr) == IH_TYPE_FIRMWARE_IVT)
  92                 /* Add size of CSF minus IVT */
  93                 len -= 0x2060 - sizeof(flash_header_v2_t);
  94
  95         if (image_size - sizeof(struct legacy_img_hdr) < len) {
  96                 debug("%s: Bad image size: \"%s\" is no valid image\n",
  97                       params->cmdname, params->imagefile);
  98                 return -FDT_ERR_BADSTRUCTURE;
  99         }
 100
 101         checksum = be32_to_cpu(hdr->ih_dcrc);
 102         if (crc32(0, data, len) != checksum) {
 103                 debug("%s: ERROR: \"%s\" has corrupted data!\n",
 104                       params->cmdname, params->imagefile);
 105                 return -FDT_ERR_BADSTRUCTURE;
 106         }
 107         return 0;
 108 }
 109
 110 static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
 111                                 struct image_tool_params *params)
 112 {
 113         uint32_t checksum;
 114         time_t time;
 115         uint32_t imagesize;
 116         uint32_t ep;
 117         uint32_t addr;
 118         int type;
 119         struct legacy_img_hdr *hdr = (struct legacy_img_hdr *)ptr;
 120
 121         checksum = crc32(0,
 122                         (const unsigned char *)(ptr +
 123                                 sizeof(struct legacy_img_hdr)),
 124                         sbuf->st_size - sizeof(struct legacy_img_hdr));
 125
 126         time = imagetool_get_source_date(params->cmdname, sbuf->st_mtime);
 127         ep = params->ep;
 128         addr = params->addr;
 129
 130         if (params->type == IH_TYPE_FIRMWARE_IVT)
 131                 /* Add size of CSF minus IVT */
 132                 imagesize = sbuf->st_size - sizeof(struct legacy_img_hdr)
 133                             + 0x2060 - sizeof(flash_header_v2_t);
 134
 135         else
 136                 imagesize = sbuf->st_size - sizeof(struct legacy_img_hdr);
 137
 138         if (params->type == IH_TYPE_FDT_LEGACY)
 139                 type = IH_TYPE_FLATDT;
 140         else
 141                 type = params->type;
 142
 143         if (params->os == IH_OS_TEE) {
 144                 addr = optee_image_get_load_addr(hdr);
 145                 ep = optee_image_get_entry_point(hdr);
 146         }
 147
 148         /* Build new header */
 149         image_set_magic(hdr, IH_MAGIC);
 150         image_set_time(hdr, time);
 151         image_set_size(hdr, imagesize);
 152         image_set_load(hdr, addr);
 153         image_set_ep(hdr, ep);
 154         image_set_dcrc(hdr, checksum);
 155         image_set_os(hdr, params->os);
 156         image_set_arch(hdr, params->arch);
 157         image_set_type(hdr, type);
 158         image_set_comp(hdr, params->comp);
 159
 160         image_set_name(hdr, params->imagename);
 161
 162         checksum = crc32(0, (const unsigned char *)hdr,
 163                                 sizeof(struct legacy_img_hdr));
 164
 165         image_set_hcrc(hdr, checksum);
 166 }
 167
 168 static int image_extract_subimage(void *ptr, struct image_tool_params *params)
 169 {
 170         const struct legacy_img_hdr *hdr = (const struct legacy_img_hdr *)ptr;
 171         ulong file_data;
 172         ulong file_len;
 173
 174         if (image_check_type(hdr, IH_TYPE_MULTI)) {
 175                 ulong idx = params->pflag;
 176                 ulong count;
 177
 178                 /* get the number of data files present in the image */
 179                 count = image_multi_count(hdr);
 180
 181                 /* retrieve the "data file" at the idx position */
 182                 image_multi_getimg(hdr, idx, &file_data, &file_len);
 183
 184                 if ((file_len == 0) || (idx >= count)) {
 185                         fprintf(stderr, "%s: No such data file %ld in \"%s\"\n",
 186                                 params->cmdname, idx, params->imagefile);
 187                         return -1;
 188                 }
 189         } else {
 190                 file_data = image_get_data(hdr);
 191                 file_len = image_get_size(hdr);
 192         }
 193
 194         /* save the "data file" into the file system */
 195         return imagetool_save_subimage(params->outfile, file_data, file_len);
 196 }
 197
 198 /*
 199  * Default image type parameters definition
 200  */
 201 U_BOOT_IMAGE_TYPE(
 202         defimage,
 203         "Default Image support",
 204         sizeof(struct legacy_img_hdr),
 205         (void *)&header,
 206         image_check_params,
 207         image_verify_header,
 208         image_print_header,
 209         image_set_header,
 210         image_extract_subimage,
 211         image_check_image_types,
 212         NULL,
 213         NULL
 214 );