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-rw-r--r--payloads/libpayload/include/cbfs_core.h134
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diff --git a/payloads/libpayload/include/cbfs_core.h b/payloads/libpayload/include/cbfs_core.h
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-/*
- *
- * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
- * Copyright (C) 2012 Google, Inc.
- *
- * This file is dual-licensed. You can choose between:
- * - The GNU GPL, version 2, as published by the Free Software Foundation
- * - The revised BSD license (without advertising clause)
- *
- * ---------------------------------------------------------------------------
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- * ---------------------------------------------------------------------------
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. 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.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
- * ---------------------------------------------------------------------------
- */
-
-#ifndef _CBFS_CORE_H_
-#define _CBFS_CORE_H_
-
-#include <commonlib/bsd/cbfs_serialized.h>
-#include <endian.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#define CBFS_HEADER_INVALID_ADDRESS ((void*)(0xffffffff))
-
-struct cbfs_stage {
- uint32_t compression; /** Compression type */
- uint64_t entry; /** entry point */
- uint64_t load; /** Where to load in memory */
- uint32_t len; /** length of data to load */
- uint32_t memlen; /** total length of object in memory */
-} __packed;
-
-#define CBFS_MEDIA_INVALID_MAP_ADDRESS ((void*)(0xffffffff))
-#define CBFS_DEFAULT_MEDIA ((void*)(0x0))
-
-/* Media for CBFS to load files. */
-struct cbfs_media {
-
- /* implementation dependent context, to hold resource references */
- void *context;
-
- /* opens media and returns 0 on success, -1 on failure */
- int (*open)(struct cbfs_media *media);
-
- /* returns number of bytes read from media into dest, starting from
- * offset for count of bytes */
- size_t (*read)(struct cbfs_media *media, void *dest, size_t offset,
- size_t count);
-
- /* returns a pointer to memory with count of bytes from media source
- * starting from offset, or CBFS_MEDIA_INVALID_MAP_ADDRESS on failure.
- * Note: mapped data can't be free unless unmap is called, even if you
- * do close first. */
- void * (*map)(struct cbfs_media *media, size_t offset, size_t count);
-
- /* returns NULL and releases the memory by address, which was allocated
- * by map */
- void * (*unmap)(struct cbfs_media *media, const void *address);
-
- /* closes media and returns 0 on success, -1 on failure. */
- int (*close)(struct cbfs_media *media);
-};
-
-/*
- * Returns pointer to a copy of the file content or NULL on error.
- * If the file is compressed, data will be decompressed.
- * The caller owns the returned memory.
- */
-void *cbfs_get_file_content(struct cbfs_media *media, const char *name,
- int type, size_t *sz);
-
-/* Returns decompressed size on success, 0 on failure. */
-size_t cbfs_decompress(int algo, const void *src, size_t srcn, void *dst,
- size_t dstn);
-
-/* returns a pointer to CBFS master header, or CBFS_HEADER_INVALID_ADDRESS
- * on failure */
-const struct cbfs_header *cbfs_get_header(struct cbfs_media *media);
-
-/* Persistent handle to a CBFS file that has not yet been fully mapped. */
-struct cbfs_handle {
- struct cbfs_media media; /* copy of original media object */
- u32 type; /* CBFS file type */
- u32 media_offset; /* offset from beginning of media */
- u32 attribute_offset; /* relative offset of attributes */
- u32 content_offset; /* relative offset of contents */
- u32 content_size; /* length of file contents in bytes */
-};
-
-/* Returns handle to CBFS file, or NULL on error. Does not yet map contents.
- * Caller is responsible to free() returned handle after use. */
-struct cbfs_handle *cbfs_get_handle(struct cbfs_media *media, const char *name);
-
-/* Given a cbfs_handle and an attribute tag, return a mapping for the first
- * instance of the attribute or NULL if none found. */
-void *cbfs_get_attr(struct cbfs_handle *handle, uint32_t tag);
-
-/* Given a cbfs_handle, returns the (decompressed) file contents in a buffer,
- * or NULL on error. If |size| is passed, will store amount of bytes read there.
- * If |limit| is not 0, will only return up to that many bytes. */
-void *cbfs_get_contents(struct cbfs_handle *handle, size_t *size, size_t limit);
-
-#endif