| /* Copyright 2010, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * This is ported from the flashmap utility: http://flashmap.googlecode.com |
| */ |
| |
| #include <limits.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "flash.h" |
| #include "fmap.h" |
| #include "search.h" |
| |
| int fmap_find(void *source_handle, |
| int (*read_chunk)(void *handle, |
| void *dest, |
| size_t offset, |
| size_t size), |
| struct fmap *fmap, |
| loff_t offset, |
| uint8_t **buf) |
| { |
| int fmap_size; |
| |
| if (memcmp(&fmap->signature, FMAP_SIGNATURE, sizeof(fmap->signature))) |
| return 0; |
| |
| fmap_size = sizeof(*fmap) + fmap->nareas * sizeof(struct fmap_area); |
| *buf = malloc(fmap_size); |
| |
| if (read_chunk(source_handle, *buf, offset, fmap_size)) { |
| msg_gdbg("[L%d] failed to read %d bytes at offset 0x%lx\n", |
| __LINE__, fmap_size, (unsigned long)offset); |
| return -1; |
| } |
| |
| return 1; |
| } |
| |
| /* Like fmap_find, but give a memory location to search FMAP. */ |
| struct fmap *fmap_find_in_memory(uint8_t *image, int size) |
| { |
| long int offset = 0; |
| uint64_t sig; |
| |
| memcpy(&sig, FMAP_SIGNATURE, strlen(FMAP_SIGNATURE)); |
| |
| for (offset = 0; offset < size; offset++) { |
| if (!memcmp(&image[offset], &sig, sizeof(sig))) { |
| return (struct fmap *)&image[offset]; |
| } |
| } |
| return NULL; |
| } |