guacamole: gpt-utils: kang from fajita
This commit is contained in:
Peter Cai
parent
6f0a85234d
commit
3ee88c428e
|
|
@ -0,0 +1,23 @@
|
|||
LOCAL_PATH := $(call my-dir)
|
||||
|
||||
include $(CLEAR_VARS)
|
||||
LOCAL_MODULE_TAGS := optional
|
||||
LOCAL_C_INCLUDES := bootable/recovery \
|
||||
$(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
|
||||
LOCAL_SRC_FILES := gpt-utils.cpp sparse_crc32.cpp
|
||||
LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
|
||||
LOCAL_MODULE := libgptutils
|
||||
include $(BUILD_STATIC_LIBRARY)
|
||||
|
||||
include $(CLEAR_VARS)
|
||||
LOCAL_MODULE_TAGS := optional
|
||||
LOCAL_C_INCLUDES := bootable/recovery \
|
||||
$(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
|
||||
LOCAL_SRC_FILES := gpt-utils.cpp sparse_crc32.cpp
|
||||
LOCAL_ADDITIONAL_DEPENDENCIES := $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
|
||||
LOCAL_SHARED_LIBRARIES += liblog libcutils
|
||||
LOCAL_MODULE := libgptutils
|
||||
LOCAL_COPY_HEADERS_TO := gpt-utils/inc
|
||||
LOCAL_COPY_HEADERS := gpt-utils.h
|
||||
LOCAL_VENDOR_MODULE := true
|
||||
include $(BUILD_SHARED_LIBRARY)
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,193 @@
|
|||
/*
|
||||
* Copyright (c) 2013,2016, The Linux Foundation. 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 The Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
|
||||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef __GPT_UTILS_H__
|
||||
#define __GPT_UTILS_H__
|
||||
#include <vector>
|
||||
#include <string>
|
||||
#include <map>
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
/******************************************************************************
|
||||
* GPT HEADER DEFINES
|
||||
******************************************************************************/
|
||||
#define GPT_SIGNATURE "EFI PART"
|
||||
#define HEADER_SIZE_OFFSET 12
|
||||
#define HEADER_CRC_OFFSET 16
|
||||
#define PRIMARY_HEADER_OFFSET 24
|
||||
#define BACKUP_HEADER_OFFSET 32
|
||||
#define FIRST_USABLE_LBA_OFFSET 40
|
||||
#define LAST_USABLE_LBA_OFFSET 48
|
||||
#define PENTRIES_OFFSET 72
|
||||
#define PARTITION_COUNT_OFFSET 80
|
||||
#define PENTRY_SIZE_OFFSET 84
|
||||
#define PARTITION_CRC_OFFSET 88
|
||||
|
||||
#define TYPE_GUID_OFFSET 0
|
||||
#define TYPE_GUID_SIZE 16
|
||||
#define PTN_ENTRY_SIZE 128
|
||||
#define UNIQUE_GUID_OFFSET 16
|
||||
#define FIRST_LBA_OFFSET 32
|
||||
#define LAST_LBA_OFFSET 40
|
||||
#define ATTRIBUTE_FLAG_OFFSET 48
|
||||
#define PARTITION_NAME_OFFSET 56
|
||||
#define MAX_GPT_NAME_SIZE 72
|
||||
|
||||
/******************************************************************************
|
||||
* AB RELATED DEFINES
|
||||
******************************************************************************/
|
||||
//Bit 48 onwords in the attribute field are the ones where we are allowed to
|
||||
//store our AB attributes.
|
||||
#define AB_FLAG_OFFSET (ATTRIBUTE_FLAG_OFFSET + 6)
|
||||
#define GPT_DISK_INIT_MAGIC 0xABCD
|
||||
#define AB_PARTITION_ATTR_SLOT_ACTIVE (0x1<<2)
|
||||
#define AB_PARTITION_ATTR_BOOT_SUCCESSFUL (0x1<<6)
|
||||
#define AB_PARTITION_ATTR_UNBOOTABLE (0x1<<7)
|
||||
#define AB_SLOT_ACTIVE_VAL 0x3F
|
||||
#define AB_SLOT_INACTIVE_VAL 0x0
|
||||
#define AB_SLOT_ACTIVE 1
|
||||
#define AB_SLOT_INACTIVE 0
|
||||
#define AB_SLOT_A_SUFFIX "_a"
|
||||
#define AB_SLOT_B_SUFFIX "_b"
|
||||
#define PTN_XBL "xbl"
|
||||
#define PTN_XBL_CFG "xbl_config"
|
||||
#define PTN_SWAP_LIST PTN_XBL, PTN_XBL_CFG, "sbl1", "rpm", "tz", "aboot", "abl", "hyp", "lksecapp", "keymaster", "cmnlib", "cmnlib32", "cmnlib64", "pmic", "apdp", "devcfg", "hosd", "keystore", "msadp", "mdtp", "mdtpsecapp", "dsp", "aop", "qupfw", "vbmeta", "dtbo", "ImageFv"
|
||||
#define AB_PTN_LIST PTN_SWAP_LIST, "boot", "system", "vendor", "modem", "bluetooth"
|
||||
#define BOOT_DEV_DIR "/dev/block/bootdevice/by-name"
|
||||
|
||||
/******************************************************************************
|
||||
* HELPER MACROS
|
||||
******************************************************************************/
|
||||
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
||||
/******************************************************************************
|
||||
* TYPES
|
||||
******************************************************************************/
|
||||
enum boot_update_stage {
|
||||
UPDATE_MAIN = 1,
|
||||
UPDATE_BACKUP,
|
||||
UPDATE_FINALIZE
|
||||
};
|
||||
|
||||
enum gpt_instance {
|
||||
PRIMARY_GPT = 0,
|
||||
SECONDARY_GPT
|
||||
};
|
||||
|
||||
enum boot_chain {
|
||||
NORMAL_BOOT = 0,
|
||||
BACKUP_BOOT
|
||||
};
|
||||
|
||||
struct gpt_disk {
|
||||
//GPT primary header
|
||||
uint8_t *hdr;
|
||||
//primary header crc
|
||||
uint32_t hdr_crc;
|
||||
//GPT backup header
|
||||
uint8_t *hdr_bak;
|
||||
//backup header crc
|
||||
uint32_t hdr_bak_crc;
|
||||
//Partition entries array
|
||||
uint8_t *pentry_arr;
|
||||
//Partition entries array for backup table
|
||||
uint8_t *pentry_arr_bak;
|
||||
//Size of the pentry array
|
||||
uint32_t pentry_arr_size;
|
||||
//Size of each element in the pentry array
|
||||
uint32_t pentry_size;
|
||||
//CRC of the partition entry array
|
||||
uint32_t pentry_arr_crc;
|
||||
//CRC of the backup partition entry array
|
||||
uint32_t pentry_arr_bak_crc;
|
||||
//Path to block dev representing the disk
|
||||
char devpath[PATH_MAX];
|
||||
//Block size of disk
|
||||
uint32_t block_size;
|
||||
uint32_t is_initialized;
|
||||
};
|
||||
|
||||
/******************************************************************************
|
||||
* FUNCTION PROTOTYPES
|
||||
******************************************************************************/
|
||||
int prepare_boot_update(enum boot_update_stage stage);
|
||||
//GPT disk methods
|
||||
struct gpt_disk* gpt_disk_alloc();
|
||||
//Free previously allocated gpt_disk struct
|
||||
void gpt_disk_free(struct gpt_disk *disk);
|
||||
//Get the details of the disk holding the partition whose name
|
||||
//is passed in via dev
|
||||
int gpt_disk_get_disk_info(const char *dev, struct gpt_disk *disk);
|
||||
|
||||
//Get pointer to partition entry from a allocated gpt_disk structure
|
||||
uint8_t* gpt_disk_get_pentry(struct gpt_disk *disk,
|
||||
const char *partname,
|
||||
enum gpt_instance instance);
|
||||
|
||||
//Update the crc fields of the modified disk structure
|
||||
int gpt_disk_update_crc(struct gpt_disk *disk);
|
||||
|
||||
//Write the contents of struct gpt_disk back to the actual disk
|
||||
int gpt_disk_commit(struct gpt_disk *disk);
|
||||
|
||||
//Return if the current device is UFS based or not
|
||||
int gpt_utils_is_ufs_device();
|
||||
|
||||
//Swtich betwieen using either the primary or the backup
|
||||
//boot LUN for boot. This is required since UFS boot partitions
|
||||
//cannot have a backup GPT which is what we use for failsafe
|
||||
//updates of the other 'critical' partitions. This function will
|
||||
//not be invoked for emmc targets and on UFS targets is only required
|
||||
//to be invoked for XBL.
|
||||
//
|
||||
//The algorithm to do this is as follows:
|
||||
//- Find the real block device(eg: /dev/block/sdb) that corresponds
|
||||
// to the /dev/block/bootdevice/by-name/xbl(bak) symlink
|
||||
//
|
||||
//- Once we have the block device 'node' name(sdb in the above example)
|
||||
// use this node to to locate the scsi generic device that represents
|
||||
// it by checking the file /sys/block/sdb/device/scsi_generic/sgY
|
||||
//
|
||||
//- Once we locate sgY we call the query ioctl on /dev/sgy to switch
|
||||
//the boot lun to either LUNA or LUNB
|
||||
int gpt_utils_set_xbl_boot_partition(enum boot_chain chain);
|
||||
|
||||
//Given a vector of partition names as a input and a reference to a map,
|
||||
//populate the map to indicate which physical disk each of the partitions
|
||||
//sits on. The key in the map is the path to the block device where the
|
||||
//partiton lies and the value is a vector of strings indicating which of
|
||||
//the passed in partiton names sits on that device.
|
||||
int gpt_utils_get_partition_map(std::vector<std::string>& partition_list,
|
||||
std::map<std::string,std::vector<std::string>>& partition_map);
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
#endif /* __GPT_UTILS_H__ */
|
||||
|
|
@ -0,0 +1,97 @@
|
|||
/*-
|
||||
* COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
|
||||
* code or tables extracted from it, as desired without restriction.
|
||||
*/
|
||||
|
||||
/*
|
||||
* First, the polynomial itself and its table of feedback terms. The
|
||||
* polynomial is
|
||||
* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
|
||||
*
|
||||
* Note that we take it "backwards" and put the highest-order term in
|
||||
* the lowest-order bit. The X^32 term is "implied"; the LSB is the
|
||||
* X^31 term, etc. The X^0 term (usually shown as "+1") results in
|
||||
* the MSB being 1
|
||||
*
|
||||
* Note that the usual hardware shift register implementation, which
|
||||
* is what we're using (we're merely optimizing it by doing eight-bit
|
||||
* chunks at a time) shifts bits into the lowest-order term. In our
|
||||
* implementation, that means shifting towards the right. Why do we
|
||||
* do it this way? Because the calculated CRC must be transmitted in
|
||||
* order from highest-order term to lowest-order term. UARTs transmit
|
||||
* characters in order from LSB to MSB. By storing the CRC this way
|
||||
* we hand it to the UART in the order low-byte to high-byte; the UART
|
||||
* sends each low-bit to hight-bit; and the result is transmission bit
|
||||
* by bit from highest- to lowest-order term without requiring any bit
|
||||
* shuffling on our part. Reception works similarly
|
||||
*
|
||||
* The feedback terms table consists of 256, 32-bit entries. Notes
|
||||
*
|
||||
* The table can be generated at runtime if desired; code to do so
|
||||
* is shown later. It might not be obvious, but the feedback
|
||||
* terms simply represent the results of eight shift/xor opera
|
||||
* tions for all combinations of data and CRC register values
|
||||
*
|
||||
* The values must be right-shifted by eight bits by the "updcrc
|
||||
* logic; the shift must be unsigned (bring in zeroes). On some
|
||||
* hardware you could probably optimize the shift in assembler by
|
||||
* using byte-swap instructions
|
||||
* polynomial $edb88320
|
||||
*
|
||||
*
|
||||
* CRC32 code derived from work by Gary S. Brown.
|
||||
*/
|
||||
|
||||
/* Code taken from FreeBSD 8 */
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
|
||||
static uint32_t crc32_tab[] = {
|
||||
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
|
||||
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
|
||||
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
|
||||
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
|
||||
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
|
||||
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
|
||||
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
|
||||
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
|
||||
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
|
||||
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
|
||||
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
|
||||
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
|
||||
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
|
||||
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
|
||||
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
|
||||
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
|
||||
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
|
||||
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
|
||||
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
|
||||
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
|
||||
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
|
||||
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
|
||||
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
|
||||
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
|
||||
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
|
||||
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
|
||||
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
|
||||
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
|
||||
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
|
||||
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
|
||||
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
|
||||
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
|
||||
|
||||
/*
|
||||
* A function that calculates the CRC-32 based on the table above is
|
||||
* given below for documentation purposes. An equivalent implementation
|
||||
* of this function that's actually used in the kernel can be found
|
||||
* in sys/libkern.h, where it can be inlined.
|
||||
*/
|
||||
|
||||
uint32_t sparse_crc32(uint32_t crc_in, const void* buf, size_t size) {
|
||||
const uint8_t* p = reinterpret_cast<const uint8_t*>(buf);
|
||||
uint32_t crc;
|
||||
|
||||
crc = crc_in ^ ~0U;
|
||||
while (size--) crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
|
||||
return crc ^ ~0U;
|
||||
}
|
||||
|
|
@ -0,0 +1,24 @@
|
|||
/*
|
||||
* Copyright (C) 2010 The Android Open Source Project
|
||||
*
|
||||
* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
* See the License for the specific language governing permissions and
|
||||
* limitations under the License.
|
||||
*/
|
||||
|
||||
#ifndef _LIBSPARSE_SPARSE_CRC32_H_
|
||||
#define _LIBSPARSE_SPARSE_CRC32_H_
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
uint32_t sparse_crc32(uint32_t crc, const void* buf, size_t size);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue