1/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */ 2/* 3 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> 4 * Copright (C) 2018 Alexander Graf <agraf@suse.de> 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#ifndef EFI_SUBSYSTEM 20#define EFI_SUBSYSTEM 10 21#endif 22 23 .section .text.head 24 25 /* 26 * Magic "MZ" signature for PE/COFF 27 */ 28 .globl ImageBase 29ImageBase: 30 .ascii "MZ" 31 .skip 58 // 'MZ' + pad + offset == 64 32 .4byte pe_header - ImageBase // Offset to the PE header. 33pe_header: 34 .ascii "PE" 35 .2byte 0 36coff_header: 37 .2byte 0x5064 // riscv64 38 .2byte 4 // nr_sections 39 .4byte 0 // TimeDateStamp 40 .4byte 0 // PointerToSymbolTable 41 .4byte 0 // NumberOfSymbols 42 .2byte section_table - optional_header // SizeOfOptionalHeader 43 .2byte 0x206 // Characteristics. 44 // IMAGE_FILE_DEBUG_STRIPPED | 45 // IMAGE_FILE_EXECUTABLE_IMAGE | 46 // IMAGE_FILE_LINE_NUMS_STRIPPED 47optional_header: 48 .2byte 0x20b // PE32+ format 49 .byte 0x02 // MajorLinkerVersion 50 .byte 0x14 // MinorLinkerVersion 51 .4byte _text_size - ImageBase // SizeOfCode 52 .4byte _alldata_size - ImageBase // SizeOfInitializedData 53 .4byte 0 // SizeOfUninitializedData 54 .4byte _start - ImageBase // AddressOfEntryPoint 55 .4byte _text - ImageBase // BaseOfCode 56 57extra_header_fields: 58 .8byte 0 // ImageBase 59 .4byte 0x1000 // SectionAlignment 60 .4byte 0x1000 // FileAlignment 61 .2byte 0 // MajorOperatingSystemVersion 62 .2byte 0 // MinorOperatingSystemVersion 63 .2byte 0 // MajorImageVersion 64 .2byte 0 // MinorImageVersion 65 .2byte 0 // MajorSubsystemVersion 66 .2byte 0 // MinorSubsystemVersion 67 .4byte 0 // Win32VersionValue 68 69 .4byte _image_end - ImageBase // SizeOfImage 70 71 // Everything before the kernel image is considered part of the header 72 .4byte _text - ImageBase // SizeOfHeaders 73 .4byte 0 // CheckSum 74 .2byte EFI_SUBSYSTEM // Subsystem 75 .2byte 0 // DllCharacteristics 76 .8byte 0 // SizeOfStackReserve 77 .8byte 0 // SizeOfStackCommit 78 .8byte 0 // SizeOfHeapReserve 79 .8byte 0 // SizeOfHeapCommit 80 .4byte 0 // LoaderFlags 81 .4byte 0x10 // NumberOfRvaAndSizes 82 83 .8byte 0 // ExportTable 84 .8byte 0 // ImportTable 85 .8byte 0 // ResourceTable 86 .8byte 0 // ExceptionTable 87 .8byte 0 // CertificationTable 88 .4byte _reloc - ImageBase // BaseRelocationTable (VirtualAddress) 89 .4byte _reloc_vsize - ImageBase // BaseRelocationTable (Size) 90 .8byte 0 // Debug 91 .8byte 0 // Architecture 92 .8byte 0 // Global Ptr 93 .8byte 0 // TLS Table 94 .8byte 0 // Load Config Table 95 .8byte 0 // Bound Import 96 .8byte 0 // IAT 97 .8byte 0 // Delay Import Descriptor 98 .8byte 0 // CLR Runtime Header 99 .8byte 0 // Reserved, must be zero 100 101 // Section table 102section_table: 103 104 .ascii ".text\0\0\0" 105 .4byte _text_vsize - ImageBase // VirtualSize 106 .4byte _text - ImageBase // VirtualAddress 107 .4byte _text_size - ImageBase // SizeOfRawData 108 .4byte _text - ImageBase // PointerToRawData 109 .4byte 0 // PointerToRelocations (0 for executables) 110 .4byte 0 // PointerToLineNumbers (0 for executables) 111 .2byte 0 // NumberOfRelocations (0 for executables) 112 .2byte 0 // NumberOfLineNumbers (0 for executables) 113 .4byte 0x60000020 // Characteristics (section flags) 114 115 /* 116 * The EFI application loader requires a relocation section 117 * because EFI applications must be relocatable. This is a 118 * dummy section as far as we are concerned. 119 */ 120 .ascii ".reloc\0\0" 121 .4byte _reloc_vsize - ImageBase // VirtualSize 122 .4byte _reloc - ImageBase // VirtualAddress 123 .4byte _reloc_size - ImageBase // SizeOfRawData 124 .4byte _reloc - ImageBase // PointerToRawData 125 .4byte 0 // PointerToRelocations 126 .4byte 0 // PointerToLineNumbers 127 .2byte 0 // NumberOfRelocations 128 .2byte 0 // NumberOfLineNumbers 129 .4byte 0x42000040 // Characteristics (section flags) 130 131 .ascii ".data\0\0\0" 132 .4byte _data_vsize - ImageBase // VirtualSize 133 .4byte _data - ImageBase // VirtualAddress 134 .4byte _data_size - ImageBase // SizeOfRawData 135 .4byte _data - ImageBase // PointerToRawData 136 .4byte 0 // PointerToRelocations 137 .4byte 0 // PointerToLineNumbers 138 .2byte 0 // NumberOfRelocations 139 .2byte 0 // NumberOfLineNumbers 140 .4byte 0xC0000040 // Characteristics (section flags) 141 142 .ascii ".rodata\0" 143 .4byte _rodata_vsize - ImageBase // VirtualSize 144 .4byte _rodata - ImageBase // VirtualAddress 145 .4byte _rodata_size - ImageBase // SizeOfRawData 146 .4byte _rodata - ImageBase // PointerToRawData 147 .4byte 0 // PointerToRelocations 148 .4byte 0 // PointerToLineNumbers 149 .2byte 0 // NumberOfRelocations 150 .2byte 0 // NumberOfLineNumbers 151 .4byte 0x40000040 // Characteristics (section flags) 152 153 .text 154 .globl _start 155 .type _start,%function 156_start: 157 addi sp, sp, -24 158 sd a0, 0(sp) 159 sd a1, 8(sp) 160 sd ra, 16(sp) 161 lla a0, ImageBase 162 lla a1, _DYNAMIC 163 call _relocate 164 bne a0, zero, 0f 165 ld a1, 8(sp) 166 ld a0, 0(sp) 167 call _entry 168 ld ra, 16(sp) 1690: addi sp, sp, 24 170 ret 171 172// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: 173 174 .data 175dummy: .4byte 0 176 177#define IMAGE_REL_ABSOLUTE 0 178 .section .reloc, "a" 179label1: 180 .4byte dummy-label1 // Page RVA 181 .4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits 182 .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy 183 .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy 184 185#if defined(__ELF__) && defined(__linux__) 186 .section .note.GNU-stack,"",%progbits 187#endif 188