| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2013-2017 Linaro Ltd |
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| 4 | * Authors: Roy Franz <roy.franz@linaro.org> |
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| 5 | * Ard Biesheuvel <ard.biesheuvel@linaro.org> |
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| 6 | */ |
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| 7 | |
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| 8 | #include <linux/pe.h> |
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| 9 | #include <linux/sizes.h> |
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| 10 | |
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| 11 | .macro __nop |
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| 12 | AR_CLASS( mov r0, r0 ) |
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| 13 | M_CLASS( nop.w ) |
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| 14 | .endm |
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| 15 | |
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| 16 | .macro __initial_nops |
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| 17 | #ifdef CONFIG_EFI_STUB |
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| 18 | @ This is a two-instruction NOP, which happens to bear the |
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| 19 | @ PE/COFF signature "MZ" in the first two bytes, so the kernel |
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| 20 | @ is accepted as an EFI binary. Booting via the UEFI stub |
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| 21 | @ will not execute those instructions, but the ARM/Linux |
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| 22 | @ boot protocol does, so we need some NOPs here. |
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| 23 | .inst MZ_MAGIC | (0xe225 << 16) @ eor r5, r5, 0x4d000 |
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| 24 | eor r5, r5, 0x4d000 @ undo previous insn |
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| 25 | #else |
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| 26 | __nop |
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| 27 | __nop |
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| 28 | #endif |
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| 29 | .endm |
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| 30 | |
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| 31 | .macro __EFI_HEADER |
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| 32 | #ifdef CONFIG_EFI_STUB |
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| 33 | .set start_offset, __efi_start - start |
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| 34 | .org start + 0x3c |
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| 35 | @ |
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| 36 | @ The PE header can be anywhere in the file, but for |
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| 37 | @ simplicity we keep it together with the MSDOS header |
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| 38 | @ The offset to the PE/COFF header needs to be at offset |
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| 39 | @ 0x3C in the MSDOS header. |
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| 40 | @ The only 2 fields of the MSDOS header that are used are this |
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| 41 | @ PE/COFF offset, and the "MZ" bytes at offset 0x0. |
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| 42 | @ |
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| 43 | .long pe_header - start @ Offset to the PE header. |
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| 44 | |
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| 45 | pe_header: |
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| 46 | .long PE_MAGIC |
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| 47 | |
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| 48 | coff_header: |
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| 49 | .short IMAGE_FILE_MACHINE_THUMB @ Machine |
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| 50 | .short section_count @ NumberOfSections |
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| 51 | .long 0 @ TimeDateStamp |
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| 52 | .long 0 @ PointerToSymbolTable |
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| 53 | .long 0 @ NumberOfSymbols |
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| 54 | .short section_table - optional_header @ SizeOfOptionalHeader |
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| 55 | .short IMAGE_FILE_32BIT_MACHINE | \ |
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| 56 | IMAGE_FILE_DEBUG_STRIPPED | \ |
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| 57 | IMAGE_FILE_EXECUTABLE_IMAGE | \ |
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| 58 | IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics |
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| 59 | |
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| 60 | #define __pecoff_code_size (__pecoff_data_start - __efi_start) |
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| 61 | |
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| 62 | optional_header: |
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| 63 | .short PE_OPT_MAGIC_PE32 @ PE32 format |
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| 64 | .byte 0x02 @ MajorLinkerVersion |
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| 65 | .byte 0x14 @ MinorLinkerVersion |
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| 66 | .long __pecoff_code_size @ SizeOfCode |
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| 67 | .long __pecoff_data_size @ SizeOfInitializedData |
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| 68 | .long 0 @ SizeOfUninitializedData |
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| 69 | .long efi_pe_entry - start @ AddressOfEntryPoint |
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| 70 | .long start_offset @ BaseOfCode |
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| 71 | .long __pecoff_data_start - start @ BaseOfData |
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| 72 | |
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| 73 | extra_header_fields: |
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| 74 | .long 0 @ ImageBase |
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| 75 | .long SZ_4K @ SectionAlignment |
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| 76 | .long SZ_512 @ FileAlignment |
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| 77 | .short 0 @ MajorOsVersion |
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| 78 | .short 0 @ MinorOsVersion |
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| 79 | .short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion |
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| 80 | .short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion |
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| 81 | .short 0 @ MajorSubsystemVersion |
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| 82 | .short 0 @ MinorSubsystemVersion |
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| 83 | .long 0 @ Win32VersionValue |
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| 84 | |
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| 85 | .long __pecoff_end - start @ SizeOfImage |
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| 86 | .long start_offset @ SizeOfHeaders |
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| 87 | .long 0 @ CheckSum |
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| 88 | .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem |
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| 89 | .short 0 @ DllCharacteristics |
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| 90 | .long 0 @ SizeOfStackReserve |
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| 91 | .long 0 @ SizeOfStackCommit |
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| 92 | .long 0 @ SizeOfHeapReserve |
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| 93 | .long 0 @ SizeOfHeapCommit |
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| 94 | .long 0 @ LoaderFlags |
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| 95 | .long (section_table - .) / 8 @ NumberOfRvaAndSizes |
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| 96 | |
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| 97 | .quad 0 @ ExportTable |
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| 98 | .quad 0 @ ImportTable |
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| 99 | .quad 0 @ ResourceTable |
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| 100 | .quad 0 @ ExceptionTable |
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| 101 | .quad 0 @ CertificationTable |
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| 102 | .quad 0 @ BaseRelocationTable |
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| 103 | |
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| 104 | section_table: |
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| 105 | .ascii ".text\0\0\0" |
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| 106 | .long __pecoff_code_size @ VirtualSize |
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| 107 | .long __efi_start @ VirtualAddress |
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| 108 | .long __pecoff_code_size @ SizeOfRawData |
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| 109 | .long __efi_start @ PointerToRawData |
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| 110 | .long 0 @ PointerToRelocations |
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| 111 | .long 0 @ PointerToLineNumbers |
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| 112 | .short 0 @ NumberOfRelocations |
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| 113 | .short 0 @ NumberOfLineNumbers |
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| 114 | .long IMAGE_SCN_CNT_CODE | \ |
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| 115 | IMAGE_SCN_MEM_READ | \ |
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| 116 | IMAGE_SCN_MEM_EXECUTE @ Characteristics |
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| 117 | |
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| 118 | .ascii ".data\0\0\0" |
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| 119 | .long __pecoff_data_size @ VirtualSize |
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| 120 | .long __pecoff_data_start - start @ VirtualAddress |
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| 121 | .long __pecoff_data_rawsize @ SizeOfRawData |
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| 122 | .long __pecoff_data_start - start @ PointerToRawData |
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| 123 | .long 0 @ PointerToRelocations |
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| 124 | .long 0 @ PointerToLineNumbers |
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| 125 | .short 0 @ NumberOfRelocations |
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| 126 | .short 0 @ NumberOfLineNumbers |
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| 127 | .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ |
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| 128 | IMAGE_SCN_MEM_READ | \ |
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| 129 | IMAGE_SCN_MEM_WRITE @ Characteristics |
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| 130 | |
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| 131 | .set section_count, (. - section_table) / 40 |
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| 132 | |
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| 133 | .align 12 |
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| 134 | __efi_start: |
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| 135 | #endif |
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| 136 | .endm |
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| 137 | |
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