/* * crt0-efi-aarch64.S - PE/COFF header for AArch64 EFI applications * * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice and this list of conditions, without modification. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License as published by the Free Software Foundation; * either version 2 of the License, or (at your option) any later version. */ .section .text.head /* * Magic "MZ" signature for PE/COFF */ .globl ImageBase ImageBase: .ascii "MZ" .skip 58 // 'MZ' + pad + offset == 64 .long pe_header - ImageBase // Offset to the PE header. pe_header: .ascii "PE" .short 0 coff_header: .short 0xaa64 // AArch64 .short 2 // nr_sections .long 0 // TimeDateStamp .long 0 // PointerToSymbolTable .long 1 // NumberOfSymbols .short section_table - optional_header // SizeOfOptionalHeader .short 0x20e // Characteristics. // IMAGE_FILE_DEBUG_STRIPPED | // IMAGE_FILE_EXECUTABLE_IMAGE | // IMAGE_FILE_LINE_NUMS_STRIPPED optional_header: .short 0x20b // PE32+ format .byte 0x02 // MajorLinkerVersion .byte 0x14 // MinorLinkerVersion .long _edata - _start // SizeOfCode .long 0 // SizeOfInitializedData .long 0 // SizeOfUninitializedData .long _start - ImageBase // AddressOfEntryPoint .long _start - ImageBase // BaseOfCode extra_header_fields: .quad 0 // ImageBase .long 32 // SectionAlignment .long 8 // FileAlignment .short 0 // MajorOperatingSystemVersion .short 0 // MinorOperatingSystemVersion .short 0 // MajorImageVersion .short 0 // MinorImageVersion .short 0 // MajorSubsystemVersion .short 0 // MinorSubsystemVersion .long 0 // Win32VersionValue .long _edata - ImageBase // SizeOfImage // Everything before the kernel image is considered part of the header .long _start - ImageBase // SizeOfHeaders .long 0 // CheckSum .short 10 // Subsystem (EFI) .short 0 // DllCharacteristics .quad 0 // SizeOfStackReserve .quad 0 // SizeOfStackCommit .quad 0 // SizeOfHeapReserve .quad 0 // SizeOfHeapCommit .long 0 // LoaderFlags .long 16 // NumberOfRvaAndSizes .quad 0 // ExportTable .quad 0 // ImportTable .quad 0 // ResourceTable .quad 0 // ExceptionTable .quad 0 // CertificationTable .quad 0 // BaseRelocationTable .quad 0 // Debug .quad 0 // Architecture .quad 0 // Global Ptr .quad 0 // TLS Table .quad 0 // Load Config Table .quad 0 // Bound Import .quad 0 // IAT .quad 0 // Delay Import Descriptor .quad 0 // CLR Runtime Header .quad 0 // Reserved // Section table section_table: /* * The EFI application loader requires a relocation section * because EFI applications must be relocatable. This is a * dummy section as far as we are concerned. */ .ascii ".reloc" .byte 0 .byte 0 // end of 0 padding of section name .long 0 .long 0 .long 0 // SizeOfRawData .long 0 // PointerToRawData .long 0 // PointerToRelocations .long 0 // PointerToLineNumbers .short 0 // NumberOfRelocations .short 0 // NumberOfLineNumbers .long 0x42100040 // Characteristics (section flags) .ascii ".text" .byte 0 .byte 0 .byte 0 .long _edata - _start // VirtualSize .long _start - ImageBase // VirtualAddress .long _edata - _start // SizeOfRawData .long _start - ImageBase // PointerToRawData .long 0 // PointerToRelocations (0 for executables) .long 0 // PointerToLineNumbers (0 for executables) .short 0 // NumberOfRelocations (0 for executables) .short 0 // NumberOfLineNumbers (0 for executables) .long 0xe0500020 // Characteristics (section flags) .align 12 .globl _start _start: stp x29, x30, [sp, #-32]! mov x29, sp stp x0, x1, [sp, #16] mov x2, x0 mov x3, x1 adr x0, ImageBase adrp x1, _DYNAMIC add x1, x1, #:lo12:_DYNAMIC bl _relocate cbnz x0, 0f ldp x0, x1, [sp, #16] bl efi_main 0: ldp x29, x30, [sp], #32 ret
