Merge pull request #677 from hzhuang1/gpt
partition: check GPT partition table
This commit is contained in:
danh-arm
GitHub
commit
97fa6f57bf
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@ -501,6 +501,17 @@ optionally be defined:
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PLAT_PL061_MAX_GPIOS := 160
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$(eval $(call add_define,PLAT_PL061_MAX_GPIOS))
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If the platform port uses the partition driver, the following constant may
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optionally be defined:
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* **PLAT_PARTITION_MAX_ENTRIES**
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Maximum number of partition entries required by the platform. This allows
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control how much memory is allocated for partition entries. The default
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value is 128.
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[For example, define the build flag in platform.mk]:
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PLAT_PARTITION_MAX_ENTRIES := 12
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$(eval $(call add_define,PLAT_PARTITION_MAX_ENTRIES))
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### File : plat_macros.S [mandatory]
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@ -0,0 +1,78 @@
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/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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||||
* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
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||||
* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
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||||
*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* 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
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <debug.h>
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#include <errno.h>
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#include <gpt.h>
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#include <string.h>
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static int unicode_to_ascii(unsigned short *str_in, unsigned char *str_out)
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{
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uint8_t *name = (uint8_t *)str_in;
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int i;
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assert((str_in != NULL) && (str_out != NULL) && (name[0] != '\0'));
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/* check whether the unicode string is valid */
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for (i = 1; i < (EFI_NAMELEN << 1); i += 2) {
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if (name[i] != '\0')
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return -EINVAL;
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}
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/* convert the unicode string to ascii string */
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for (i = 0; i < (EFI_NAMELEN << 1); i += 2) {
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str_out[i >> 1] = name[i];
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if (name[i] == '\0')
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break;
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}
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return 0;
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}
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int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry)
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{
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int result;
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assert((gpt_entry != 0) && (entry != 0));
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if ((gpt_entry->first_lba == 0) && (gpt_entry->last_lba == 0)) {
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return -EINVAL;
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}
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memset(entry, 0, sizeof(partition_entry_t));
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result = unicode_to_ascii(gpt_entry->name, (uint8_t *)entry->name);
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if (result != 0) {
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return result;
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}
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entry->start = (uint64_t)gpt_entry->first_lba * PARTITION_BLOCK_SIZE;
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entry->length = (uint64_t)(gpt_entry->last_lba -
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gpt_entry->first_lba + 1) *
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PARTITION_BLOCK_SIZE;
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return 0;
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}
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@ -0,0 +1,229 @@
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/*
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* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
|
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <debug.h>
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#include <io_storage.h>
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#include <gpt.h>
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#include <mbr.h>
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#include <partition.h>
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#include <platform.h>
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#include <string.h>
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static uint8_t mbr_sector[PARTITION_BLOCK_SIZE];
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partition_entry_list_t list;
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#if LOG_LEVEL >= LOG_LEVEL_VERBOSE
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static void dump_entries(int num)
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{
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char name[EFI_NAMELEN];
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int i, j, len;
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VERBOSE("Partition table with %d entries:\n", num);
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for (i = 0; i < num; i++) {
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len = snprintf(name, EFI_NAMELEN, "%s", list.list[i].name);
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for (j = 0; j < EFI_NAMELEN - len - 1; j++) {
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name[len + j] = ' ';
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}
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name[EFI_NAMELEN - 1] = '\0';
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VERBOSE("%d: %s %lx-%lx\n", i + 1, name, list.list[i].start,
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list.list[i].start + list.list[i].length - 4);
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}
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}
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#else
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#define dump_entries(num) ((void)num)
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#endif
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/*
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* Load the first sector that carries MBR header.
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* The MBR boot signature should be always valid whether it's MBR or GPT.
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*/
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static int load_mbr_header(uintptr_t image_handle, mbr_entry_t *mbr_entry)
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{
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size_t bytes_read;
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uintptr_t offset;
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int result;
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assert(mbr_entry != NULL);
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/* MBR partition table is in LBA0. */
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result = io_seek(image_handle, IO_SEEK_SET, MBR_OFFSET);
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if (result != 0) {
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WARN("Failed to seek (%i)\n", result);
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return result;
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}
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result = io_read(image_handle, (uintptr_t)&mbr_sector,
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PARTITION_BLOCK_SIZE, &bytes_read);
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if (result != 0) {
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WARN("Failed to read data (%i)\n", result);
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return result;
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}
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/* Check MBR boot signature. */
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if ((mbr_sector[PARTITION_BLOCK_SIZE - 2] != MBR_SIGNATURE_FIRST) ||
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(mbr_sector[PARTITION_BLOCK_SIZE - 1] != MBR_SIGNATURE_SECOND)) {
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return -ENOENT;
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}
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offset = (uintptr_t)&mbr_sector + MBR_PRIMARY_ENTRY_OFFSET;
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memcpy(mbr_entry, (void *)offset, sizeof(mbr_entry_t));
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return 0;
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}
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/*
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* Load GPT header and check the GPT signature.
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* If partiton numbers could be found, check & update it.
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*/
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static int load_gpt_header(uintptr_t image_handle)
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{
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gpt_header_t header;
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size_t bytes_read;
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int result;
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result = io_seek(image_handle, IO_SEEK_SET, GPT_HEADER_OFFSET);
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if (result != 0) {
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return result;
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}
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result = io_read(image_handle, (uintptr_t)&header,
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sizeof(gpt_header_t), &bytes_read);
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if ((result != 0) || (sizeof(gpt_header_t) != bytes_read)) {
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return result;
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}
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if (memcmp(header.signature, GPT_SIGNATURE,
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sizeof(header.signature)) != 0) {
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return -EINVAL;
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}
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/* partition numbers can't exceed PLAT_PARTITION_MAX_ENTRIES */
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list.entry_count = header.list_num;
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if (list.entry_count > PLAT_PARTITION_MAX_ENTRIES) {
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list.entry_count = PLAT_PARTITION_MAX_ENTRIES;
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}
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return 0;
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}
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static int load_gpt_entry(uintptr_t image_handle, gpt_entry_t *entry)
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{
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size_t bytes_read;
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int result;
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assert(entry != NULL);
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result = io_read(image_handle, (uintptr_t)entry, sizeof(gpt_entry_t),
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&bytes_read);
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if (sizeof(gpt_entry_t) != bytes_read)
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return -EINVAL;
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return result;
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}
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static int verify_partition_gpt(uintptr_t image_handle)
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{
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gpt_entry_t entry;
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int result, i;
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for (i = 0; i < list.entry_count; i++) {
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result = load_gpt_entry(image_handle, &entry);
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assert(result == 0);
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result = parse_gpt_entry(&entry, &list.list[i]);
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if (result != 0) {
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break;
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}
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}
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if (i == 0) {
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return -EINVAL;
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}
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/*
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* Only records the valid partition number that is loaded from
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* partition table.
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*/
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list.entry_count = i;
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dump_entries(list.entry_count);
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return 0;
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}
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int load_partition_table(unsigned int image_id)
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{
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uintptr_t dev_handle, image_handle, image_spec = 0;
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mbr_entry_t mbr_entry;
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int result;
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result = plat_get_image_source(image_id, &dev_handle, &image_spec);
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if (result != 0) {
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WARN("Failed to obtain reference to image id=%u (%i)\n",
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image_id, result);
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return result;
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}
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result = io_open(dev_handle, image_spec, &image_handle);
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if (result != 0) {
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WARN("Failed to access image id=%u (%i)\n", image_id, result);
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return result;
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}
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result = load_mbr_header(image_handle, &mbr_entry);
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if (result != 0) {
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WARN("Failed to access image id=%u (%i)\n", image_id, result);
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return result;
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}
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if (mbr_entry.type == PARTITION_TYPE_GPT) {
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result = load_gpt_header(image_handle);
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assert(result == 0);
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result = io_seek(image_handle, IO_SEEK_SET, GPT_ENTRY_OFFSET);
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assert(result == 0);
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result = verify_partition_gpt(image_handle);
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} else {
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/* MBR type isn't supported yet. */
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result = -EINVAL;
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goto exit;
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}
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exit:
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io_close(image_handle);
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return result;
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}
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const partition_entry_t *get_partition_entry(const char *name)
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{
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int i;
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for (i = 0; i < list.entry_count; i++) {
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if (strcmp(name, list.list[i].name) == 0) {
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return &list.list[i];
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}
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}
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return NULL;
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}
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const partition_entry_list_t *get_partition_entry_list(void)
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{
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return &list;
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}
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void partition_init(unsigned int image_id)
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{
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load_partition_table(image_id);
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}
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@ -0,0 +1,75 @@
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/*
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* Copyright (c) 2016, ARM Limited and Contributors. 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 ARM 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 HOLDER 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.
|
||||
*/
|
||||
|
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#ifndef __GPT_H__
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#define __GPT_H__
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#include <partition.h>
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#define PARTITION_TYPE_GPT 0xee
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#define GPT_HEADER_OFFSET PARTITION_BLOCK_SIZE
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#define GPT_ENTRY_OFFSET (GPT_HEADER_OFFSET + \
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PARTITION_BLOCK_SIZE)
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#define GUID_LEN 16
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#define GPT_SIGNATURE "EFI PART"
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|
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typedef struct gpt_entry {
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unsigned char type_uuid[GUID_LEN];
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unsigned char unique_uuid[GUID_LEN];
|
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unsigned long long first_lba;
|
||||
unsigned long long last_lba;
|
||||
unsigned long long attr;
|
||||
unsigned short name[EFI_NAMELEN];
|
||||
} gpt_entry_t;
|
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|
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typedef struct gpt_header {
|
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unsigned char signature[8];
|
||||
unsigned int revision;
|
||||
unsigned int size;
|
||||
unsigned int header_crc;
|
||||
unsigned int reserved;
|
||||
unsigned long long current_lba;
|
||||
unsigned long long backup_lba;
|
||||
unsigned long long first_lba;
|
||||
unsigned long long last_lba;
|
||||
unsigned char disk_uuid[16];
|
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/* starting LBA of array of partition entries */
|
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unsigned long long part_lba;
|
||||
/* number of partition entries in array */
|
||||
unsigned int list_num;
|
||||
/* size of a single partition entry (usually 128) */
|
||||
unsigned int part_size;
|
||||
unsigned int part_crc;
|
||||
} gpt_header_t;
|
||||
|
||||
int parse_gpt_entry(gpt_entry_t *gpt_entry, partition_entry_t *entry);
|
||||
|
||||
#endif /* __GPT_H__ */
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. 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 ARM 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 HOLDER 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 __MBR_H__
|
||||
#define __MBR_H__
|
||||
|
||||
#define MBR_OFFSET 0
|
||||
|
||||
#define MBR_PRIMARY_ENTRY_OFFSET 0x1be
|
||||
#define MBR_PRIMARY_ENTRY_SIZE 0x10
|
||||
#define MBR_PRIMARY_ENTRY_NUMBER 4
|
||||
#define MBR_CHS_ADDRESS_LEN 3
|
||||
|
||||
#define MBR_SIGNATURE_FIRST 0x55
|
||||
#define MBR_SIGNATURE_SECOND 0xAA
|
||||
|
||||
typedef struct mbr_entry {
|
||||
unsigned char status;
|
||||
unsigned char first_sector[MBR_CHS_ADDRESS_LEN];
|
||||
unsigned char type;
|
||||
unsigned char last_sector[MBR_CHS_ADDRESS_LEN];
|
||||
unsigned int first_lba;
|
||||
unsigned int sector_nums;
|
||||
} mbr_entry_t;
|
||||
|
||||
#endif /* __MBR_H__ */
|
||||
|
|
@ -0,0 +1,63 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. 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 ARM 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 HOLDER 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 __PARTITION_H__
|
||||
#define __PARTITION_H__
|
||||
|
||||
#include <cassert.h>
|
||||
#include <types.h>
|
||||
|
||||
#if !PLAT_PARTITION_MAX_ENTRIES
|
||||
# define PLAT_PARTITION_MAX_ENTRIES 128
|
||||
#endif /* PLAT_PARTITION_MAX_ENTRIES */
|
||||
|
||||
CASSERT(PLAT_PARTITION_MAX_ENTRIES <= 128, assert_plat_partition_max_entries);
|
||||
|
||||
#define PARTITION_BLOCK_SIZE 512
|
||||
|
||||
#define EFI_NAMELEN 36
|
||||
|
||||
typedef struct partition_entry {
|
||||
uint64_t start;
|
||||
uint64_t length;
|
||||
char name[EFI_NAMELEN];
|
||||
} partition_entry_t;
|
||||
|
||||
typedef struct partition_entry_list {
|
||||
partition_entry_t list[PLAT_PARTITION_MAX_ENTRIES];
|
||||
int entry_count;
|
||||
} partition_entry_list_t;
|
||||
|
||||
int load_partition_table(unsigned int image_id);
|
||||
const partition_entry_t *get_partition_entry(const char *name);
|
||||
const partition_entry_list_t *get_partition_entry_list(void);
|
||||
void partition_init(unsigned int image_id);
|
||||
|
||||
#endif /* __PARTITION_H__ */
|
||||
Loading…
Reference in New Issue