tools/fit_common.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2014
   4  * DENX Software Engineering
   5  * Heiko Schocher <hs@denx.de>
   6  *
   7  * (C) Copyright 2008 Semihalf
   8  *
   9  * (C) Copyright 2000-2004
  10  * DENX Software Engineering
  11  * Wolfgang Denk, wd@denx.de
  12  *
  13  * Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
  14  *              FIT image specific code abstracted from mkimage.c
  15  *              some functions added to address abstraction
  16  *
  17  * All rights reserved.
  18  */
  19
  20 #include "imagetool.h"
  21 #include "mkimage.h"
  22 #include "fit_common.h"
  23 #include <image.h>
  24 #include <u-boot/crc.h>
  25
  26 int fit_verify_header(unsigned char *ptr, int image_size,
  27                         struct image_tool_params *params)
  28 {
  29         if (fdt_check_header(ptr) != EXIT_SUCCESS || !fit_check_format(ptr))
  30                 return EXIT_FAILURE;
  31
  32         return EXIT_SUCCESS;
  33 }
  34
  35 int fit_check_image_types(uint8_t type)
  36 {
  37         if (type == IH_TYPE_FLATDT)
  38                 return EXIT_SUCCESS;
  39         else
  40                 return EXIT_FAILURE;
  41 }
  42
  43 int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
  44              void **blobp, struct stat *sbuf, bool delete_on_error,
  45              bool read_only)
  46 {
  47         void *ptr;
  48         int fd;
  49
  50         /* Load FIT blob into memory (we need to write hashes/signatures) */
  51         fd = open(fname, (read_only ? O_RDONLY : O_RDWR) | O_BINARY);
  52
  53         if (fd < 0) {
  54                 fprintf(stderr, "%s: Can't open %s: %s\n",
  55                         cmdname, fname, strerror(errno));
  56                 goto err;
  57         }
  58
  59         if (fstat(fd, sbuf) < 0) {
  60                 fprintf(stderr, "%s: Can't stat %s: %s\n",
  61                         cmdname, fname, strerror(errno));
  62                 goto err;
  63         }
  64
  65         if (size_inc) {
  66                 sbuf->st_size += size_inc;
  67                 if (ftruncate(fd, sbuf->st_size)) {
  68                         fprintf(stderr, "%s: Can't expand %s: %s\n",
  69                                 cmdname, fname, strerror(errno));
  70                 goto err;
  71                 }
  72         }
  73
  74         errno = 0;
  75         ptr = mmap(0, sbuf->st_size,
  76                    (read_only ? PROT_READ : PROT_READ | PROT_WRITE), MAP_SHARED,
  77                    fd, 0);
  78         if ((ptr == MAP_FAILED) || (errno != 0)) {
  79                 fprintf(stderr, "%s: Can't read %s: %s\n",
  80                         cmdname, fname, strerror(errno));
  81                 goto err;
  82         }
  83
  84         /* check if ptr has a valid blob */
  85         if (fdt_check_header(ptr)) {
  86                 fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
  87                 goto err;
  88         }
  89
  90         /* expand if needed */
  91         if (size_inc) {
  92                 int ret;
  93
  94                 ret = fdt_open_into(ptr, ptr, sbuf->st_size);
  95                 if (ret) {
  96                         fprintf(stderr, "%s: Cannot expand FDT: %s\n",
  97                                 cmdname, fdt_strerror(ret));
  98                         goto err;
  99                 }
 100         }
 101
 102         *blobp = ptr;
 103         return fd;
 104
 105 err:
 106         if (fd >= 0)
 107                 close(fd);
 108         if (delete_on_error)
 109                 unlink(fname);
 110
 111         return -1;
 112 }