summaryrefslogtreecommitdiff
path: root/arch/arm/boot/compressed/efi-header.S
blob: c94a88ae834dc3b28418279e188fdbfb8ac7da2c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/*
 * Copyright (C) 2013-2017 Linaro Ltd
 * Authors: Roy Franz <roy.franz@linaro.org>
 *          Ard Biesheuvel <ard.biesheuvel@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/pe.h>
#include <linux/sizes.h>

		.macro	__nop
#ifdef CONFIG_EFI_STUB
		@ This is almost but not quite a NOP, since it does clobber the
		@ condition flags. But it is the best we can do for EFI, since
		@ PE/COFF expects the magic string "MZ" at offset 0, while the
		@ ARM/Linux boot protocol expects an executable instruction
		@ there.
		.inst	MZ_MAGIC | (0x1310 << 16)	@ tstne r0, #0x4d000
#else
 AR_CLASS(	mov	r0, r0		)
  M_CLASS(	nop.w			)
#endif
		.endm

		.macro	__EFI_HEADER
#ifdef CONFIG_EFI_STUB
		.set	start_offset, __efi_start - start
		.org	start + 0x3c
		@
		@ The PE header can be anywhere in the file, but for
		@ simplicity we keep it together with the MSDOS header
		@ The offset to the PE/COFF header needs to be at offset
		@ 0x3C in the MSDOS header.
		@ The only 2 fields of the MSDOS header that are used are this
		@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
		@
		.long	pe_header - start		@ Offset to the PE header.

pe_header:
		.long	PE_MAGIC

coff_header:
		.short	IMAGE_FILE_MACHINE_THUMB	@ Machine
		.short	section_count			@ NumberOfSections
		.long	0 				@ TimeDateStamp
		.long	0				@ PointerToSymbolTable
		.long	0				@ NumberOfSymbols
		.short	section_table - optional_header	@ SizeOfOptionalHeader
		.short	IMAGE_FILE_32BIT_MACHINE | \
			IMAGE_FILE_DEBUG_STRIPPED | \
			IMAGE_FILE_EXECUTABLE_IMAGE | \
			IMAGE_FILE_LINE_NUMS_STRIPPED	@ Characteristics

#define __pecoff_code_size (__pecoff_data_start - __efi_start)

optional_header:
		.short	PE_OPT_MAGIC_PE32		@ PE32 format
		.byte	0x02				@ MajorLinkerVersion
		.byte	0x14				@ MinorLinkerVersion
		.long	__pecoff_code_size		@ SizeOfCode
		.long	__pecoff_data_size		@ SizeOfInitializedData
		.long	0				@ SizeOfUninitializedData
		.long	efi_stub_entry - start		@ AddressOfEntryPoint
		.long	start_offset			@ BaseOfCode
		.long	__pecoff_data_start - start	@ BaseOfData

extra_header_fields:
		.long	0				@ ImageBase
		.long	SZ_4K				@ SectionAlignment
		.long	SZ_512				@ FileAlignment
		.short	0				@ MajorOsVersion
		.short	0				@ MinorOsVersion
		.short	0				@ MajorImageVersion
		.short	0				@ MinorImageVersion
		.short	0				@ MajorSubsystemVersion
		.short	0				@ MinorSubsystemVersion
		.long	0				@ Win32VersionValue

		.long	__pecoff_end - start		@ SizeOfImage
		.long	start_offset			@ SizeOfHeaders
		.long	0				@ CheckSum
		.short	IMAGE_SUBSYSTEM_EFI_APPLICATION	@ Subsystem
		.short	0				@ DllCharacteristics
		.long	0				@ SizeOfStackReserve
		.long	0				@ SizeOfStackCommit
		.long	0				@ SizeOfHeapReserve
		.long	0				@ SizeOfHeapCommit
		.long	0				@ LoaderFlags
		.long	(section_table - .) / 8		@ NumberOfRvaAndSizes

		.quad	0				@ ExportTable
		.quad	0				@ ImportTable
		.quad	0				@ ResourceTable
		.quad	0				@ ExceptionTable
		.quad	0				@ CertificationTable
		.quad	0				@ BaseRelocationTable

section_table:
		.ascii	".text\0\0\0"
		.long	__pecoff_code_size		@ VirtualSize
		.long	__efi_start			@ VirtualAddress
		.long	__pecoff_code_size		@ SizeOfRawData
		.long	__efi_start			@ PointerToRawData
		.long	0				@ PointerToRelocations
		.long	0				@ PointerToLineNumbers
		.short	0				@ NumberOfRelocations
		.short	0				@ NumberOfLineNumbers
		.long	IMAGE_SCN_CNT_CODE | \
			IMAGE_SCN_MEM_READ | \
			IMAGE_SCN_MEM_EXECUTE		@ Characteristics

		.ascii	".data\0\0\0"
		.long	__pecoff_data_size		@ VirtualSize
		.long	__pecoff_data_start - start	@ VirtualAddress
		.long	__pecoff_data_rawsize		@ SizeOfRawData
		.long	__pecoff_data_start - start	@ PointerToRawData
		.long	0				@ PointerToRelocations
		.long	0				@ PointerToLineNumbers
		.short	0				@ NumberOfRelocations
		.short	0				@ NumberOfLineNumbers
		.long	IMAGE_SCN_CNT_INITIALIZED_DATA | \
			IMAGE_SCN_MEM_READ | \
			IMAGE_SCN_MEM_WRITE		@ Characteristics

		.set	section_count, (. - section_table) / 40

		.align	12
__efi_start:
#endif
		.endm