1/* 2 * crt0-efi-aarch64.S - PE/COFF header for AArch64 EFI applications 3 * 4 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice and this list of conditions, without modification. 11 * 2. The name of the author may not be used to endorse or promote products 12 * derived from this software without specific prior written permission. 13 * 14 * Alternatively, this software may be distributed under the terms of the 15 * GNU General Public License as published by the Free Software Foundation; 16 * either version 2 of the License, or (at your option) any later version. 17 */ 18 19 .section .text.head 20 21 /* 22 * Magic "MZ" signature for PE/COFF 23 */ 24 .globl ImageBase 25ImageBase: 26 .ascii "MZ" 27 .skip 58 // 'MZ' + pad + offset == 64 28 .long pe_header - ImageBase // Offset to the PE header. 29pe_header: 30 .ascii "PE" 31 .short 0 32coff_header: 33 .short 0xaa64 // AArch64 34 .short 2 // nr_sections 35 .long 0 // TimeDateStamp 36 .long 0 // PointerToSymbolTable 37 .long 0 // NumberOfSymbols 38 .short section_table - optional_header // SizeOfOptionalHeader 39 .short 0x206 // Characteristics. 40 // IMAGE_FILE_DEBUG_STRIPPED | 41 // IMAGE_FILE_EXECUTABLE_IMAGE | 42 // IMAGE_FILE_LINE_NUMS_STRIPPED 43optional_header: 44 .short 0x20b // PE32+ format 45 .byte 0x02 // MajorLinkerVersion 46 .byte 0x14 // MinorLinkerVersion 47 .long _data - _start // SizeOfCode 48 .long _data_size // SizeOfInitializedData 49 .long 0 // SizeOfUninitializedData 50 .long _start - ImageBase // AddressOfEntryPoint 51 .long _start - ImageBase // BaseOfCode 52 53extra_header_fields: 54 .quad 0 // ImageBase 55 .long 0x1000 // SectionAlignment 56 .long 0x200 // FileAlignment 57 .short 0 // MajorOperatingSystemVersion 58 .short 0 // MinorOperatingSystemVersion 59 .short 0 // MajorImageVersion 60 .short 0 // MinorImageVersion 61 .short 0 // MajorSubsystemVersion 62 .short 0 // MinorSubsystemVersion 63 .long 0 // Win32VersionValue 64 65 .long _edata - ImageBase // SizeOfImage 66 67 // Everything before the kernel image is considered part of the header 68 .long _start - ImageBase // SizeOfHeaders 69 .long 0 // CheckSum 70 .short EFI_SUBSYSTEM // Subsystem 71 .short 0 // DllCharacteristics 72 .quad 0 // SizeOfStackReserve 73 .quad 0 // SizeOfStackCommit 74 .quad 0 // SizeOfHeapReserve 75 .quad 0 // SizeOfHeapCommit 76 .long 0 // LoaderFlags 77 .long 0x6 // NumberOfRvaAndSizes 78 79 .quad 0 // ExportTable 80 .quad 0 // ImportTable 81 .quad 0 // ResourceTable 82 .quad 0 // ExceptionTable 83 .quad 0 // CertificationTable 84 .quad 0 // BaseRelocationTable 85 86 // Section table 87section_table: 88 .ascii ".text\0\0\0" 89 .long _data - _start // VirtualSize 90 .long _start - ImageBase // VirtualAddress 91 .long _data - _start // SizeOfRawData 92 .long _start - ImageBase // PointerToRawData 93 94 .long 0 // PointerToRelocations (0 for executables) 95 .long 0 // PointerToLineNumbers (0 for executables) 96 .short 0 // NumberOfRelocations (0 for executables) 97 .short 0 // NumberOfLineNumbers (0 for executables) 98 .long 0x60000020 // Characteristics (section flags) 99 100 .ascii ".data\0\0\0" 101 .long _data_size // VirtualSize 102 .long _data - ImageBase // VirtualAddress 103 .long _data_size // SizeOfRawData 104 .long _data - ImageBase // PointerToRawData 105 106 .long 0 // PointerToRelocations (0 for executables) 107 .long 0 // PointerToLineNumbers (0 for executables) 108 .short 0 // NumberOfRelocations (0 for executables) 109 .short 0 // NumberOfLineNumbers (0 for executables) 110 .long 0xc0000040 // Characteristics (section flags) 111 112 .align 12 113_start: 114 stp x29, x30, [sp, #-32]! 115 mov x29, sp 116 117 stp x0, x1, [sp, #16] 118 mov x2, x0 119 mov x3, x1 120 adr x0, ImageBase 121 adrp x1, _DYNAMIC 122 add x1, x1, #:lo12:_DYNAMIC 123 bl _relocate 124 cbnz x0, 0f 125 126 ldp x0, x1, [sp, #16] 127 bl efi_main 128 1290: ldp x29, x30, [sp], #32 130 ret 131