LXR uboot/tools/fit

   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
  26int fit_verify_header(unsigned char *ptr, int image_size,
  27                        struct image_tool_params *params)
  28{
  29        if (fdt_check_header(ptr) != EXIT_SUCCESS ||
  30            fit_check_format(ptr, IMAGE_SIZE_INVAL))
  31                return EXIT_FAILURE;
  32
  33        return EXIT_SUCCESS;
  34}
  35
  36int fit_check_image_types(uint8_t type)
  37{
  38        if (type == IH_TYPE_FLATDT)
  39                return EXIT_SUCCESS;
  40        else
  41                return EXIT_FAILURE;
  42}
  43
  44int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
  45             void **blobp, struct stat *sbuf, bool delete_on_error,
  46             bool read_only)
  47{
  48        void *ptr;
  49        int fd;
  50
  51        /* Load FIT blob into memory (we need to write hashes/signatures) */
  52        fd = open(fname, (read_only ? O_RDONLY : O_RDWR) | O_BINARY);
  53
  54        if (fd < 0) {
  55                fprintf(stderr, "%s: Can't open %s: %s\n",
  56                        cmdname, fname, strerror(errno));
  57                goto err;
  58        }
  59
  60        if (fstat(fd, sbuf) < 0) {
  61                fprintf(stderr, "%s: Can't stat %s: %s\n",
  62                        cmdname, fname, strerror(errno));
  63                goto err;
  64        }
  65
  66        if (size_inc) {
  67                sbuf->st_size += size_inc;
  68                if (ftruncate(fd, sbuf->st_size)) {
  69                        fprintf(stderr, "%s: Can't expand %s: %s\n",
  70                                cmdname, fname, strerror(errno));
  71                goto err;
  72                }
  73        }
  74
  75        errno = 0;
  76        ptr = mmap(0, sbuf->st_size,
  77                   (read_only ? PROT_READ : PROT_READ | PROT_WRITE), MAP_SHARED,
  78                   fd, 0);
  79        if ((ptr == MAP_FAILED) || (errno != 0)) {
  80                fprintf(stderr, "%s: Can't read %s: %s\n",
  81                        cmdname, fname, strerror(errno));
  82                goto err;
  83        }
  84
  85        /* check if ptr has a valid blob */
  86        if (fdt_check_header(ptr)) {
  87                fprintf(stderr, "%s: Invalid FIT blob\n", cmdname);
  88                goto err;
  89        }
  90
  91        /* expand if needed */
  92        if (size_inc) {
  93                int ret;
  94
  95                ret = fdt_open_into(ptr, ptr, sbuf->st_size);
  96                if (ret) {
  97                        fprintf(stderr, "%s: Cannot expand FDT: %s\n",
  98                                cmdname, fdt_strerror(ret));
  99                        goto err;
 100                }
 101        }
 102
 103        *blobp = ptr;
 104        return fd;
 105
 106err:
 107        if (fd >= 0)
 108                close(fd);
 109        if (delete_on_error)
 110                unlink(fname);
 111
 112        return -1;
 113}
 114