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1/*
2 * Copyright (C) 2013-2017 Linaro Ltd
3 * Authors: Roy Franz <roy.franz@linaro.org>
4 * Ard Biesheuvel <ard.biesheuvel@linaro.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#include <linux/pe.h>
12#include <linux/sizes.h>
13
14 .macro __nop
15#ifdef CONFIG_EFI_STUB
16 @ This is almost but not quite a NOP, since it does clobber the
17 @ condition flags. But it is the best we can do for EFI, since
18 @ PE/COFF expects the magic string "MZ" at offset 0, while the
19 @ ARM/Linux boot protocol expects an executable instruction
20 @ there.
21 .inst MZ_MAGIC | (0x1310 << 16) @ tstne r0, #0x4d000
22#else
23 AR_CLASS( mov r0, r0 )
24 M_CLASS( nop.w )
25#endif
26 .endm
27
28 .macro __EFI_HEADER
29#ifdef CONFIG_EFI_STUB
30 .set start_offset, __efi_start - start
31 .org start + 0x3c
32 @
33 @ The PE header can be anywhere in the file, but for
34 @ simplicity we keep it together with the MSDOS header
35 @ The offset to the PE/COFF header needs to be at offset
36 @ 0x3C in the MSDOS header.
37 @ The only 2 fields of the MSDOS header that are used are this
38 @ PE/COFF offset, and the "MZ" bytes at offset 0x0.
39 @
40 .long pe_header - start @ Offset to the PE header.
41
42pe_header:
43 .long PE_MAGIC
44
45coff_header:
46 .short IMAGE_FILE_MACHINE_THUMB @ Machine
47 .short section_count @ NumberOfSections
48 .long 0 @ TimeDateStamp
49 .long 0 @ PointerToSymbolTable
50 .long 0 @ NumberOfSymbols
51 .short section_table - optional_header @ SizeOfOptionalHeader
52 .short IMAGE_FILE_32BIT_MACHINE | \
53 IMAGE_FILE_DEBUG_STRIPPED | \
54 IMAGE_FILE_EXECUTABLE_IMAGE | \
55 IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics
56
57#define __pecoff_code_size (__pecoff_data_start - __efi_start)
58
59optional_header:
60 .short PE_OPT_MAGIC_PE32 @ PE32 format
61 .byte 0x02 @ MajorLinkerVersion
62 .byte 0x14 @ MinorLinkerVersion
63 .long __pecoff_code_size @ SizeOfCode
64 .long __pecoff_data_size @ SizeOfInitializedData
65 .long 0 @ SizeOfUninitializedData
66 .long efi_stub_entry - start @ AddressOfEntryPoint
67 .long start_offset @ BaseOfCode
68 .long __pecoff_data_start - start @ BaseOfData
69
70extra_header_fields:
71 .long 0 @ ImageBase
72 .long SZ_4K @ SectionAlignment
73 .long SZ_512 @ FileAlignment
74 .short 0 @ MajorOsVersion
75 .short 0 @ MinorOsVersion
76 .short 0 @ MajorImageVersion
77 .short 0 @ MinorImageVersion
78 .short 0 @ MajorSubsystemVersion
79 .short 0 @ MinorSubsystemVersion
80 .long 0 @ Win32VersionValue
81
82 .long __pecoff_end - start @ SizeOfImage
83 .long start_offset @ SizeOfHeaders
84 .long 0 @ CheckSum
85 .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem
86 .short 0 @ DllCharacteristics
87 .long 0 @ SizeOfStackReserve
88 .long 0 @ SizeOfStackCommit
89 .long 0 @ SizeOfHeapReserve
90 .long 0 @ SizeOfHeapCommit
91 .long 0 @ LoaderFlags
92 .long (section_table - .) / 8 @ NumberOfRvaAndSizes
93
94 .quad 0 @ ExportTable
95 .quad 0 @ ImportTable
96 .quad 0 @ ResourceTable
97 .quad 0 @ ExceptionTable
98 .quad 0 @ CertificationTable
99 .quad 0 @ BaseRelocationTable
100
101section_table:
102 .ascii ".text\0\0\0"
103 .long __pecoff_code_size @ VirtualSize
104 .long __efi_start @ VirtualAddress
105 .long __pecoff_code_size @ SizeOfRawData
106 .long __efi_start @ PointerToRawData
107 .long 0 @ PointerToRelocations
108 .long 0 @ PointerToLineNumbers
109 .short 0 @ NumberOfRelocations
110 .short 0 @ NumberOfLineNumbers
111 .long IMAGE_SCN_CNT_CODE | \
112 IMAGE_SCN_MEM_READ | \
113 IMAGE_SCN_MEM_EXECUTE @ Characteristics
114
115 .ascii ".data\0\0\0"
116 .long __pecoff_data_size @ VirtualSize
117 .long __pecoff_data_start - start @ VirtualAddress
118 .long __pecoff_data_rawsize @ SizeOfRawData
119 .long __pecoff_data_start - start @ PointerToRawData
120 .long 0 @ PointerToRelocations
121 .long 0 @ PointerToLineNumbers
122 .short 0 @ NumberOfRelocations
123 .short 0 @ NumberOfLineNumbers
124 .long IMAGE_SCN_CNT_INITIALIZED_DATA | \
125 IMAGE_SCN_MEM_READ | \
126 IMAGE_SCN_MEM_WRITE @ Characteristics
127
128 .set section_count, (. - section_table) / 40
129
130 .align 12
131__efi_start:
132#endif
133 .endm
1/*
2 * Copyright (C) 2013-2015 Linaro Ltd
3 * Authors: Roy Franz <roy.franz@linaro.org>
4 * Ard Biesheuvel <ard.biesheuvel@linaro.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 .macro __nop
12#ifdef CONFIG_EFI_STUB
13 @ This is almost but not quite a NOP, since it does clobber the
14 @ condition flags. But it is the best we can do for EFI, since
15 @ PE/COFF expects the magic string "MZ" at offset 0, while the
16 @ ARM/Linux boot protocol expects an executable instruction
17 @ there.
18 .inst 'M' | ('Z' << 8) | (0x1310 << 16) @ tstne r0, #0x4d000
19#else
20 mov r0, r0
21#endif
22 .endm
23
24 .macro __EFI_HEADER
25#ifdef CONFIG_EFI_STUB
26 b __efi_start
27
28 .set start_offset, __efi_start - start
29 .org start + 0x3c
30 @
31 @ The PE header can be anywhere in the file, but for
32 @ simplicity we keep it together with the MSDOS header
33 @ The offset to the PE/COFF header needs to be at offset
34 @ 0x3C in the MSDOS header.
35 @ The only 2 fields of the MSDOS header that are used are this
36 @ PE/COFF offset, and the "MZ" bytes at offset 0x0.
37 @
38 .long pe_header - start @ Offset to the PE header.
39
40pe_header:
41 .ascii "PE\0\0"
42
43coff_header:
44 .short 0x01c2 @ ARM or Thumb
45 .short 2 @ nr_sections
46 .long 0 @ TimeDateStamp
47 .long 0 @ PointerToSymbolTable
48 .long 1 @ NumberOfSymbols
49 .short section_table - optional_header
50 @ SizeOfOptionalHeader
51 .short 0x306 @ Characteristics.
52 @ IMAGE_FILE_32BIT_MACHINE |
53 @ IMAGE_FILE_DEBUG_STRIPPED |
54 @ IMAGE_FILE_EXECUTABLE_IMAGE |
55 @ IMAGE_FILE_LINE_NUMS_STRIPPED
56
57optional_header:
58 .short 0x10b @ PE32 format
59 .byte 0x02 @ MajorLinkerVersion
60 .byte 0x14 @ MinorLinkerVersion
61 .long _end - __efi_start @ SizeOfCode
62 .long 0 @ SizeOfInitializedData
63 .long 0 @ SizeOfUninitializedData
64 .long efi_stub_entry - start @ AddressOfEntryPoint
65 .long start_offset @ BaseOfCode
66 .long 0 @ data
67
68extra_header_fields:
69 .long 0 @ ImageBase
70 .long 0x200 @ SectionAlignment
71 .long 0x200 @ FileAlignment
72 .short 0 @ MajorOperatingSystemVersion
73 .short 0 @ MinorOperatingSystemVersion
74 .short 0 @ MajorImageVersion
75 .short 0 @ MinorImageVersion
76 .short 0 @ MajorSubsystemVersion
77 .short 0 @ MinorSubsystemVersion
78 .long 0 @ Win32VersionValue
79
80 .long _end - start @ SizeOfImage
81 .long start_offset @ SizeOfHeaders
82 .long 0 @ CheckSum
83 .short 0xa @ Subsystem (EFI application)
84 .short 0 @ DllCharacteristics
85 .long 0 @ SizeOfStackReserve
86 .long 0 @ SizeOfStackCommit
87 .long 0 @ SizeOfHeapReserve
88 .long 0 @ SizeOfHeapCommit
89 .long 0 @ LoaderFlags
90 .long 0x6 @ NumberOfRvaAndSizes
91
92 .quad 0 @ ExportTable
93 .quad 0 @ ImportTable
94 .quad 0 @ ResourceTable
95 .quad 0 @ ExceptionTable
96 .quad 0 @ CertificationTable
97 .quad 0 @ BaseRelocationTable
98
99section_table:
100 @
101 @ The EFI application loader requires a relocation section
102 @ because EFI applications must be relocatable. This is a
103 @ dummy section as far as we are concerned.
104 @
105 .ascii ".reloc\0\0"
106 .long 0 @ VirtualSize
107 .long 0 @ VirtualAddress
108 .long 0 @ SizeOfRawData
109 .long 0 @ PointerToRawData
110 .long 0 @ PointerToRelocations
111 .long 0 @ PointerToLineNumbers
112 .short 0 @ NumberOfRelocations
113 .short 0 @ NumberOfLineNumbers
114 .long 0x42100040 @ Characteristics
115
116 .ascii ".text\0\0\0"
117 .long _end - __efi_start @ VirtualSize
118 .long __efi_start @ VirtualAddress
119 .long _edata - __efi_start @ SizeOfRawData
120 .long __efi_start @ PointerToRawData
121 .long 0 @ PointerToRelocations
122 .long 0 @ PointerToLineNumbers
123 .short 0 @ NumberOfRelocations
124 .short 0 @ NumberOfLineNumbers
125 .long 0xe0500020 @ Characteristics
126
127 .align 9
128__efi_start:
129#endif
130 .endm