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 27/* 28 * We need to be a PE32+ file for EFI. On some architectures we can use 29 * objcopy to create the correct file, however on arm64 we need to do 30 * it ourselves. 31 */ 32 33#define IMAGE_FILE_MACHINE_ARM64 0xaa64 34 35#define IMAGE_FILE_EXECUTABLE 0x0002 36 37#define IMAGE_SCN_CNT_CODE 0x00000020 38#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 39#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 40#define IMAGE_SCN_MEM_EXECUTE 0x20000000 41#define IMAGE_SCN_MEM_READ 0x40000000 42#define IMAGE_SCN_MEM_WRITE 0x80000000 43 44 .section .peheader,"a" 45efi_start: 46 /* The MS-DOS Stub, only used to get the offset of the COFF header */ 47 .ascii "MZ" 48 .short 0 49 .space 0x38 50 .long pe_sig - efi_start 51 52 /* The PE32 Signature. Needs to be 8-byte aligned */ 53 .align 3 54pe_sig: 55 .ascii "PE" 56 .short 0 57coff_head: 58 .short IMAGE_FILE_MACHINE_ARM64 /* AArch64 file */ 59 .short 2 /* 2 Sections */ 60 .long 0 /* Timestamp */ 61 .long 0 /* No symbol table */ 62 .long 0 /* No symbols */ 63 .short section_table - optional_header /* Optional header size */ 64 .short IMAGE_FILE_EXECUTABLE /* Characteristics */ 65 66optional_header: 67 .short 0x020b /* PE32+ (64-bit addressing) */ 68 .byte 0 /* Major linker version */ 69 .byte 0 /* Minor linker version */ 70 .long _etext - _end_header /* Code size */ 71 .long __data_size /* Initialized data size */ 72 .long 0 /* No uninitialized data */ 73 .long _start - efi_start /* Entry point */ 74 .long _end_header - efi_start /* Start of code */ 75 76optional_windows_header: 77 .quad 0 /* Image base */ 78 .long 4096 /* Section Alignment */ 79 .long 512 /* File alignment */ 80 .short 0 /* Major OS version */ 81 .short 0 /* Minor OS version */ 82 .short 0 /* Major image version */ 83 .short 0 /* Minor image version */ 84 .short 0 /* Major subsystem version */ 85 .short 0 /* Minor subsystem version */ 86 .long 0 /* Win32 version */ 87 .long _edata - efi_start /* Image size */ 88 .long _end_header - efi_start /* Header size */ 89 .long 0 /* Checksum */ 90 .short 0xa /* Subsystem (EFI app) */ 91 .short 0 /* DLL Characteristics */ 92 .quad 0 /* Stack reserve */ 93 .quad 0 /* Stack commit */ 94 .quad 0 /* Heap reserve */ 95 .quad 0 /* Heap commit */ 96 .long 0 /* Loader flags */ 97 .long 6 /* Number of RVAs */ 98 99 /* RVAs: */ 100 .quad 0 101 .quad 0 102 .quad 0 103 .quad 0 104 .quad 0 105 .quad 0 106 107section_table: 108 .ascii ".text" 109 .byte 0 110 .byte 0 111 .byte 0 /* Pad to 8 bytes */ 112 .long _etext - _end_header /* Virtual size */ 113 .long _end_header - efi_start /* Virtual address */ 114 .long _etext - _end_header /* Size of raw data */ 115 .long _end_header - efi_start /* Pointer to raw data */ 116 .long 0 /* Pointer to relocations */ 117 .long 0 /* Pointer to line numbers */ 118 .short 0 /* Number of relocations */ 119 .short 0 /* Number of line numbers */ 120 .long (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | \ 121 IMAGE_SCN_MEM_READ) /* Characteristics */ 122 123 .ascii ".data" 124 .byte 0 125 .byte 0 126 .byte 0 /* Pad to 8 bytes */ 127 .long __data_size /* Virtual size */ 128 .long __data_start - efi_start /* Virtual address */ 129 .long __data_size /* Size of raw data */ 130 .long __data_start - efi_start /* Pointer to raw data */ 131 .long 0 /* Pointer to relocations */ 132 .long 0 /* Pointer to line numbers */ 133 .short 0 /* Number of relocations */ 134 .short 0 /* Number of line numbers */ 135 .long (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | \ 136 IMAGE_SCN_MEM_WRITE) /* Characteristics */ 137 138 .align 12 139_end_header: 140 141 .text 142 .globl _start 143_start: 144 /* Save the boot params to the stack */ 145 stp x0, x1, [sp, #-16]! 146 147 adrp x0, __bss_start 148 add x0, x0, :lo12:__bss_start 149 adrp x1, __bss_end 150 add x1, x1, :lo12:__bss_end 151 152 b 2f 153 1541: 155 stp xzr, xzr, [x0], #16 1562: 157 cmp x0, x1 158 b.lo 1b 159 160 adrp x0, ImageBase 161 add x0, x0, :lo12:ImageBase 162 adrp x1, _DYNAMIC 163 add x1, x1, :lo12:_DYNAMIC 164 165 bl self_reloc 166 167 ldp x0, x1, [sp], #16 168 169#ifndef EFI_BOOT1 170 /* 171 * Load the stack to use. The default stack may be too small for 172 * the lua loader. 173 */ 174 adrp x2, initstack_end 175 add x2, x2, :lo12:initstack_end 176 mov sp, x2 177#endif 178 179 bl efi_main 180 1811: b 1b 182 183#ifndef EFI_BOOT1 184.bss 185 .align 4 186initstack: 187 .space (64 * 1024) 188initstack_end: 189#endif 190