1/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */ 2/* 3 * crt0-efi-aarch64.S - PE/COFF header for aarch64 EFI applications 4 * 5 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> 6 * 7 * 8 * This file is taken and modified from the gnu-efi project. 9 */ 10 11#include <asm-generic/pe.h> 12 13 .section .text.head 14 15 /* 16 * Magic "MZ" signature for PE/COFF 17 */ 18 .globl ImageBase 19ImageBase: 20 .ascii "MZ" 21 .skip 58 /* 'MZ' + pad + offset == 64 */ 22 .long pe_header - ImageBase /* Offset to the PE header */ 23pe_header: 24 .ascii "PE" 25 .short 0 26coff_header: 27 .short 0xaa64 /* AArch64 */ 28 .short 2 /* nr_sections */ 29 .long 0 /* TimeDateStamp */ 30 .long 0 /* PointerToSymbolTable */ 31 .long 0 /* NumberOfSymbols */ 32 .short section_table - optional_header /* SizeOfOptionalHeader */ 33 /* Characteristics */ 34 .short (IMAGE_FILE_EXECUTABLE_IMAGE | \ 35 IMAGE_FILE_LINE_NUMS_STRIPPED | \ 36 IMAGE_FILE_LOCAL_SYMS_STRIPPED | \ 37 IMAGE_FILE_DEBUG_STRIPPED) 38optional_header: 39 .short 0x20b /* PE32+ format */ 40 .byte 0x02 /* MajorLinkerVersion */ 41 .byte 0x14 /* MinorLinkerVersion */ 42 .long _edata - _start /* SizeOfCode */ 43 .long 0 /* SizeOfInitializedData */ 44 .long 0 /* SizeOfUninitializedData */ 45 .long _start - ImageBase /* AddressOfEntryPoint */ 46 .long _start - ImageBase /* BaseOfCode */ 47 48extra_header_fields: 49 .quad 0 /* ImageBase */ 50 .long 0x20 /* SectionAlignment */ 51 .long 0x8 /* FileAlignment */ 52 .short 0 /* MajorOperatingSystemVersion */ 53 .short 0 /* MinorOperatingSystemVersion */ 54 .short 0 /* MajorImageVersion */ 55 .short 0 /* MinorImageVersion */ 56 .short 0 /* MajorSubsystemVersion */ 57 .short 0 /* MinorSubsystemVersion */ 58 .long 0 /* Win32VersionValue */ 59 60 .long _edata - ImageBase /* SizeOfImage */ 61 62 /* 63 * Everything before the kernel image is considered part of the header 64 */ 65 .long _start - ImageBase /* SizeOfHeaders */ 66 .long 0 /* CheckSum */ 67 .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */ 68 .short 0 /* DllCharacteristics */ 69 .quad 0 /* SizeOfStackReserve */ 70 .quad 0 /* SizeOfStackCommit */ 71 .quad 0 /* SizeOfHeapReserve */ 72 .quad 0 /* SizeOfHeapCommit */ 73 .long 0 /* LoaderFlags */ 74 .long 0x6 /* NumberOfRvaAndSizes */ 75 76 .quad 0 /* ExportTable */ 77 .quad 0 /* ImportTable */ 78 .quad 0 /* ResourceTable */ 79 .quad 0 /* ExceptionTable */ 80 .quad 0 /* CertificationTable */ 81 .quad 0 /* BaseRelocationTable */ 82 83 /* Section table */ 84section_table: 85 86 /* 87 * The EFI application loader requires a relocation section 88 * because EFI applications must be relocatable. This is a 89 * dummy section as far as we are concerned. 90 */ 91 .ascii ".reloc" 92 .byte 0 93 .byte 0 /* end of 0 padding of section name */ 94 .long 0 95 .long 0 96 .long 0 /* SizeOfRawData */ 97 .long 0 /* PointerToRawData */ 98 .long 0 /* PointerToRelocations */ 99 .long 0 /* PointerToLineNumbers */ 100 .short 0 /* NumberOfRelocations */ 101 .short 0 /* NumberOfLineNumbers */ 102 .long 0x42100040 /* Characteristics (section flags) */ 103 104 105 .ascii ".text" 106 .byte 0 107 .byte 0 108 .byte 0 /* end of 0 padding of section name */ 109 .long _edata - _start /* VirtualSize */ 110 .long _start - ImageBase /* VirtualAddress */ 111 .long _edata - _start /* SizeOfRawData */ 112 .long _start - ImageBase /* PointerToRawData */ 113 114 .long 0 /* PointerToRelocations (0 for executables) */ 115 .long 0 /* PointerToLineNumbers (0 for executables) */ 116 .short 0 /* NumberOfRelocations (0 for executables) */ 117 .short 0 /* NumberOfLineNumbers (0 for executables) */ 118 .long 0xe0500020 /* Characteristics (section flags) */ 119 120_start: 121 stp x29, x30, [sp, #-32]! 122 mov x29, sp 123 124 stp x0, x1, [sp, #16] 125 adr x0, ImageBase 126 adrp x1, _DYNAMIC 127 add x1, x1, #:lo12:_DYNAMIC 128 bl _relocate 129 cbnz x0, 0f 130 131 ldp x0, x1, [sp, #16] 132 bl efi_main 133 1340: ldp x29, x30, [sp], #32 135 ret 136