1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2013-2017 Linaro Ltd 4 * Authors: Roy Franz <roy.franz@linaro.org> 5 * Ard Biesheuvel <ard.biesheuvel@linaro.org> 6 */ 7 8#include <linux/pe.h> 9#include <linux/sizes.h> 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 MZ_MAGIC | (0x1310 << 16) @ tstne r0, #0x4d000 19#else 20 AR_CLASS( mov r0, r0 ) 21 M_CLASS( nop.w ) 22#endif 23 .endm 24 25 .macro __EFI_HEADER 26#ifdef CONFIG_EFI_STUB 27 .set start_offset, __efi_start - start 28 .org start + 0x3c 29 @ 30 @ The PE header can be anywhere in the file, but for 31 @ simplicity we keep it together with the MSDOS header 32 @ The offset to the PE/COFF header needs to be at offset 33 @ 0x3C in the MSDOS header. 34 @ The only 2 fields of the MSDOS header that are used are this 35 @ PE/COFF offset, and the "MZ" bytes at offset 0x0. 36 @ 37 .long pe_header - start @ Offset to the PE header. 38 39pe_header: 40 .long PE_MAGIC 41 42coff_header: 43 .short IMAGE_FILE_MACHINE_THUMB @ Machine 44 .short section_count @ NumberOfSections 45 .long 0 @ TimeDateStamp 46 .long 0 @ PointerToSymbolTable 47 .long 0 @ NumberOfSymbols 48 .short section_table - optional_header @ SizeOfOptionalHeader 49 .short IMAGE_FILE_32BIT_MACHINE | \ 50 IMAGE_FILE_DEBUG_STRIPPED | \ 51 IMAGE_FILE_EXECUTABLE_IMAGE | \ 52 IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics 53 54#define __pecoff_code_size (__pecoff_data_start - __efi_start) 55 56optional_header: 57 .short PE_OPT_MAGIC_PE32 @ PE32 format 58 .byte 0x02 @ MajorLinkerVersion 59 .byte 0x14 @ MinorLinkerVersion 60 .long __pecoff_code_size @ SizeOfCode 61 .long __pecoff_data_size @ SizeOfInitializedData 62 .long 0 @ SizeOfUninitializedData 63 .long efi_pe_entry - start @ AddressOfEntryPoint 64 .long start_offset @ BaseOfCode 65 .long __pecoff_data_start - start @ BaseOfData 66 67extra_header_fields: 68 .long 0 @ ImageBase 69 .long SZ_4K @ SectionAlignment 70 .long SZ_512 @ FileAlignment 71 .short 0 @ MajorOsVersion 72 .short 0 @ MinorOsVersion 73 .short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion 74 .short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion 75 .short 0 @ MajorSubsystemVersion 76 .short 0 @ MinorSubsystemVersion 77 .long 0 @ Win32VersionValue 78 79 .long __pecoff_end - start @ SizeOfImage 80 .long start_offset @ SizeOfHeaders 81 .long 0 @ CheckSum 82 .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem 83 .short 0 @ DllCharacteristics 84 .long 0 @ SizeOfStackReserve 85 .long 0 @ SizeOfStackCommit 86 .long 0 @ SizeOfHeapReserve 87 .long 0 @ SizeOfHeapCommit 88 .long 0 @ LoaderFlags 89 .long (section_table - .) / 8 @ NumberOfRvaAndSizes 90 91 .quad 0 @ ExportTable 92 .quad 0 @ ImportTable 93 .quad 0 @ ResourceTable 94 .quad 0 @ ExceptionTable 95 .quad 0 @ CertificationTable 96 .quad 0 @ BaseRelocationTable 97 98section_table: 99 .ascii ".text\0\0\0" 100 .long __pecoff_code_size @ VirtualSize 101 .long __efi_start @ VirtualAddress 102 .long __pecoff_code_size @ SizeOfRawData 103 .long __efi_start @ PointerToRawData 104 .long 0 @ PointerToRelocations 105 .long 0 @ PointerToLineNumbers 106 .short 0 @ NumberOfRelocations 107 .short 0 @ NumberOfLineNumbers 108 .long IMAGE_SCN_CNT_CODE | \ 109 IMAGE_SCN_MEM_READ | \ 110 IMAGE_SCN_MEM_EXECUTE @ Characteristics 111 112 .ascii ".data\0\0\0" 113 .long __pecoff_data_size @ VirtualSize 114 .long __pecoff_data_start - start @ VirtualAddress 115 .long __pecoff_data_rawsize @ SizeOfRawData 116 .long __pecoff_data_start - start @ PointerToRawData 117 .long 0 @ PointerToRelocations 118 .long 0 @ PointerToLineNumbers 119 .short 0 @ NumberOfRelocations 120 .short 0 @ NumberOfLineNumbers 121 .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ 122 IMAGE_SCN_MEM_READ | \ 123 IMAGE_SCN_MEM_WRITE @ Characteristics 124 125 .set section_count, (. - section_table) / 40 126 127 .align 12 128__efi_start: 129#endif 130 .endm 131