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         return fdt_check_header(ptr);
  30 }
  31
  32 int fit_check_image_types(uint8_t type)
  33 {
  34         if (type == IH_TYPE_FLATDT)
  35                 return EXIT_SUCCESS;
  36         else
  37                 return EXIT_FAILURE;
  38 }
  39
  40 int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
  41              void **blobp, struct stat *sbuf, bool delete_on_error)
  42 {
  43         void *ptr;
  44         int fd;
  45
  46         /* Load FIT blob into memory (we need to write hashes/signatures) */
  47         fd = open(fname, O_RDWR | O_BINARY);
  48
  49         if (fd < 0) {
  50                 fprintf(stderr, "%s: Can't open %s: %s\n",
  51                         cmdname, fname, strerror(errno));
  52                 goto err;
  53         }
  54
  55         if (fstat(fd, sbuf) < 0) {
  56                 fprintf(stderr, "%s: Can't stat %s: %s\n",
  57                         cmdname, fname, strerror(errno));
  58                 goto err;
  59         }
  60
  61         if (size_inc) {
  62                 sbuf->st_size += size_inc;
  63                 if (ftruncate(fd, sbuf->st_size)) {
  64                         fprintf(stderr, "%s: Can't expand %s: %s\n",
  65                                 cmdname, fname, strerror(errno));
  66                 goto err;
  67                 }
  68         }
  69
  70         errno = 0;
  71         ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  72         if ((ptr == MAP_FAILED) || (errno != 0)) {
  73                 fprintf(stderr, "%s: Can't read %s: %s\n",
  74                         cmdname, fname, strerror(errno));
  75                 goto err;
  76         }
  77
  78         /* check if ptr has a valid blob */
  79         if (fdt_check_header(ptr)) {
  80                 fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
  81                 goto err;
  82         }
  83
  84         /* expand if needed */
  85         if (size_inc) {
  86                 int ret;
  87
  88                 ret = fdt_open_into(ptr, ptr, sbuf->st_size);
  89                 if (ret) {
  90                         fprintf(stderr, "%s: Cannot expand FDT: %s\n",
  91                                 cmdname, fdt_strerror(ret));
  92                         goto err;
  93                 }
  94         }
  95
  96         *blobp = ptr;
  97         return fd;
  98
  99 err:
 100         if (fd >= 0)
 101                 close(fd);
 102         if (delete_on_error)
 103                 unlink(fname);
 104
 105         return -1;
 106 }