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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | /* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2013-2017 Linaro Ltd * Authors: Roy Franz <roy.franz@linaro.org> * Ard Biesheuvel <ard.biesheuvel@linaro.org> */ #include <linux/pe.h> #include <linux/sizes.h> .macro __nop AR_CLASS( mov r0, r0 ) M_CLASS( nop.w ) .endm .macro __initial_nops #ifdef CONFIG_EFI_STUB @ This is a two-instruction NOP, which happens to bear the @ PE/COFF signature "MZ" in the first two bytes, so the kernel @ is accepted as an EFI binary. Booting via the UEFI stub @ will not execute those instructions, but the ARM/Linux @ boot protocol does, so we need some NOPs here. .inst MZ_MAGIC | (0xe225 << 16) @ eor r5, r5, 0x4d000 eor r5, r5, 0x4d000 @ undo previous insn #else __nop __nop #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_pe_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 LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion .short LINUX_EFISTUB_MINOR_VERSION @ 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 |