1/*- 2 * Copyright (c) 2014 Andrew Turner 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29/* 30 * We need to be a PE32+ file for EFI. On some architectures we can use 31 * objcopy to create the correct file, however on arm64 we need to do 32 * it ourselves. 33 */ 34 35#define IMAGE_FILE_MACHINE_ARM64 0xaa64 36 37#define IMAGE_FILE_EXECUTABLE 0x0002 38 39#define IMAGE_SCN_CNT_CODE 0x00000020 40#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 41#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 42#define IMAGE_SCN_MEM_EXECUTE 0x20000000 43#define IMAGE_SCN_MEM_READ 0x40000000 44#define IMAGE_SCN_MEM_WRITE 0x80000000 45 46 .section .peheader,"a" 47efi_start: 48 /* The MS-DOS Stub, only used to get the offset of the COFF header */ 49 .ascii "MZ" 50 .short 0 51 .space 0x38 52 .long pe_sig - efi_start 53 54 /* The PE32 Signature. Needs to be 8-byte aligned */ 55 .align 3 56pe_sig: 57 .ascii "PE" 58 .short 0 59coff_head: 60 .short IMAGE_FILE_MACHINE_ARM64 /* AArch64 file */ 61 .short 2 /* 2 Sections */ 62 .long 0 /* Timestamp */ 63 .long 0 /* No symbol table */ 64 .long 0 /* No symbols */ 65 .short section_table - optional_header /* Optional header size */ 66 .short IMAGE_FILE_EXECUTABLE /* Characteristics */ 67 68optional_header: 69 .short 0x020b /* PE32+ (64-bit addressing) */ 70 .byte 0 /* Major linker version */ 71 .byte 0 /* Minor linker version */ 72 .long _etext - _end_header /* Code size */ 73 .long __data_size /* Initialized data size */ 74 .long 0 /* No uninitialized data */ 75 .long _start - efi_start /* Entry point */ 76 .long _end_header - efi_start /* Start of code */ 77 78optional_windows_header: 79 .quad 0 /* Image base */ 80 .long 4096 /* Section Alignment */ 81 .long 512 /* File alignment */ 82 .short 0 /* Major OS version */ 83 .short 0 /* Minor OS version */ 84 .short 0 /* Major image version */ 85 .short 0 /* Minor image version */ 86 .short 0 /* Major subsystem version */ 87 .short 0 /* Minor subsystem version */ 88 .long 0 /* Win32 version */ 89 .long _edata - efi_start /* Image size */ 90 .long _end_header - efi_start /* Header size */ 91 .long 0 /* Checksum */ 92 .short 0xa /* Subsystem (EFI app) */ 93 .short 0 /* DLL Characteristics */ 94 .quad 0 /* Stack reserve */ 95 .quad 0 /* Stack commit */ 96 .quad 0 /* Heap reserve */ 97 .quad 0 /* Heap commit */ 98 .long 0 /* Loader flags */ 99 .long 6 /* Number of RVAs */ 100 101 /* RVAs: */ 102 .quad 0 103 .quad 0 104 .quad 0 105 .quad 0 106 .quad 0 107 .quad 0 108 109section_table: 110 .ascii ".text" 111 .byte 0 112 .byte 0 113 .byte 0 /* Pad to 8 bytes */ 114 .long _etext - _end_header /* Virtual size */ 115 .long _end_header - efi_start /* Virtual address */ 116 .long _etext - _end_header /* Size of raw data */ 117 .long _end_header - efi_start /* Pointer to raw data */ 118 .long 0 /* Pointer to relocations */ 119 .long 0 /* Pointer to line numbers */ 120 .short 0 /* Number of relocations */ 121 .short 0 /* Number of line numbers */ 122 .long (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | \ 123 IMAGE_SCN_MEM_READ) /* Characteristics */ 124 125 .ascii ".data" 126 .byte 0 127 .byte 0 128 .byte 0 /* Pad to 8 bytes */ 129 .long __data_size /* Virtual size */ 130 .long __data_start - efi_start /* Virtual address */ 131 .long __data_size /* Size of raw data */ 132 .long __data_start - efi_start /* Pointer to raw data */ 133 .long 0 /* Pointer to relocations */ 134 .long 0 /* Pointer to line numbers */ 135 .short 0 /* Number of relocations */ 136 .short 0 /* Number of line numbers */ 137 .long (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | \ 138 IMAGE_SCN_MEM_WRITE) /* Characteristics */ 139 140 .align 12 141_end_header: 142 143 .text 144 .globl _start 145_start: 146 /* Save the boot params to the stack */ 147 stp x0, x1, [sp, #-16]! 148 149 adrp x0, __bss_start 150 add x0, x0, :lo12:__bss_start 151 adrp x1, __bss_end 152 add x1, x1, :lo12:__bss_end 153 154 b 2f 155 1561: 157 stp xzr, xzr, [x0], #16 1582: 159 cmp x0, x1 160 b.lo 1b 161 162 adrp x0, ImageBase 163 add x0, x0, :lo12:ImageBase 164 adrp x1, _DYNAMIC 165 add x1, x1, :lo12:_DYNAMIC 166 167 bl self_reloc 168 169 ldp x0, x1, [sp], #16 170 171#ifndef EFI_BOOT1 172 /* 173 * Load the stack to use. The default stack may be too small for 174 * the lua loader. 175 */ 176 adrp x2, initstack_end 177 add x2, x2, :lo12:initstack_end 178 mov sp, x2 179#endif 180 181 bl efi_main 182 1831: b 1b 184 185#ifndef EFI_BOOT1 186.bss 187 .align 4 188initstack: 189 .space (64 * 1024) 190initstack_end: 191#endif 192