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f7a45cc01d
It turned out that shared verified boot library fails to work properly when compiled by msc in BIOS environment. The culprit was identified as failing 64 bit logical operations by preprocessor. It is probably possible to come up with a certain compile flag set to fix the operations, but it is not easy to modify and control the BIOS compilation environment. The alternative solution is to limit the size of the field in question to 16 bits (especially since this is the only part of the attributes field which is supposed to be altered by firmware. A union is being introduced in firmware/lib/cgptlib/include/gpt.h:GptEntry to allow accessing the field both as a 64 bit entity and a top 16 bit field. All places where this field is used are being modified appropriately. tests/Makefile is being fixed to allow controlling test run from the top level directory. Tested by building everything and running tests. All tests pass. Review URL: http://codereview.chromium.org/2799019
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Defines EFI related structure. See more details in EFI 2.3 spec.
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*
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* To download EFI standard, please visit UEFI homepage:
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* http://www.uefi.org/
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*/
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#ifndef VBOOT_REFERENCE_CGPTLIB_GPT_H_
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#define VBOOT_REFERENCE_CGPTLIB_GPT_H_
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#include "sysincludes.h"
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#define GPT_HEADER_SIGNATURE "EFI PART"
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#define GPT_HEADER_SIGNATURE_SIZE sizeof(GPT_HEADER_SIGNATURE)
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#define GPT_HEADER_REVISION 0x00010000
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/* The first 3 numbers should be stored in network-endian format
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* according to the GUID RFC. The UEFI spec appendix A claims they
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* should be stored in little-endian format. But they need to be
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* _displayed_ in network-endian format, which is also how they're
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* documented in the specs.
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*
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* Since what we have here are little-endian constants, they're
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* byte-swapped from the normal display order. */
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#define GPT_ENT_TYPE_UNUSED \
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{{{0x00000000,0x0000,0x0000,0x00,0x00,{0x00,0x00,0x00,0x00,0x00,0x00}}}}
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#define GPT_ENT_TYPE_EFI \
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{{{0xc12a7328,0xf81f,0x11d2,0xba,0x4b,{0x00,0xa0,0xc9,0x3e,0xc9,0x3b}}}}
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#define GPT_ENT_TYPE_CHROMEOS_KERNEL \
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{{{0xfe3a2a5d,0x4f32,0x41a7,0xb7,0x25,{0xac,0xcc,0x32,0x85,0xa3,0x09}}}}
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#define GPT_ENT_TYPE_CHROMEOS_ROOTFS \
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{{{0x3cb8e202,0x3b7e,0x47dd,0x8a,0x3c,{0x7f,0xf2,0xa1,0x3c,0xfc,0xec}}}}
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#define GPT_ENT_TYPE_CHROMEOS_RESERVED \
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{{{0x2e0a753d,0x9e48,0x43b0,0x83,0x37,{0xb1,0x51,0x92,0xcb,0x1b,0x5e}}}}
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#define GPT_ENT_TYPE_LINUX_DATA \
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{{{0xebd0a0a2,0xb9e5,0x4433,0x87,0xc0,{0x68,0xb6,0xb7,0x26,0x99,0xc7}}}}
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#define UUID_NODE_LEN 6
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#define GUID_SIZE 16
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/* GUID definition.
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* Defined in appendix A of EFI standard.
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*/
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typedef struct {
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union {
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struct {
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uint32_t time_low;
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uint16_t time_mid;
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uint16_t time_high_and_version;
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uint8_t clock_seq_high_and_reserved;
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uint8_t clock_seq_low;
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uint8_t node[UUID_NODE_LEN];
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} Uuid;
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uint8_t raw[GUID_SIZE];
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} u;
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} __attribute__((packed)) Guid;
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/* Some constant values */
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extern const Guid guid_unused;
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extern const Guid guid_chromeos_kernel;
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/* GPT header defines how many partitions exist on a drive and sectors managed.
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* For every drive device, there are 2 headers, primary and secondary.
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* Most of fields are duplicated except my_lba and entries_lba.
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*
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* You may find more details in chapter 5 of EFI standard.
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*/
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typedef struct {
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char signature[8];
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uint32_t revision;
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uint32_t size;
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uint32_t header_crc32;
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uint32_t reserved_zero;
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uint64_t my_lba;
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uint64_t alternate_lba;
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uint64_t first_usable_lba;
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uint64_t last_usable_lba;
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Guid disk_uuid;
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uint64_t entries_lba;
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uint32_t number_of_entries;
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uint32_t size_of_entry;
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uint32_t entries_crc32;
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uint8_t reserved_padding[]; /* entire sector reserved for header */
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} __attribute__((packed)) GptHeader;
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/* GPT partition entry defines the starting and ending LBAs of a partition.
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* It also contains the unique GUID, type, and attribute bits.
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*
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* You may find more details in chapter 5 of EFI standard.
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*/
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typedef struct {
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Guid type;
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Guid unique;
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uint64_t starting_lba;
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uint64_t ending_lba;
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union {
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struct {
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uint64_t : 48;
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uint16_t gpt_att : 16;
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} __attribute__((packed)) fields;
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uint64_t whole;
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} attrs;
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uint16_t name[36]; /* UTF-16 encoded partition name */
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uint8_t reserved[]; /* nothing, really */
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} __attribute__((packed)) GptEntry;
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#endif /* VBOOT_REFERENCE_CGPTLIB_GPT_H_ */
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