1/* 2 * crt0-efi-loongarch64.S - PE/COFF header for LoongArch64 EFI applications 3 * 4 * Copyright (C) 2021 Loongson Technology Corporation Limited. <zhoumingtao@loongson.cn> 5 * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice and this list of conditions, without modification. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * Alternatively, this software may be distributed under the terms of the 16 * GNU General Public License as published by the Free Software Foundation; 17 * either version 2 of the License, or (at your option) any later version. 18 */ 19 20#ifndef EFI_SUBSYSTEM 21#define EFI_SUBSYSTEM 0xa 22#endif 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 0x6264 // loongarch64 little endian 38 .2byte 2 // nr_sections 39 .4byte 0 // TimeDateStamp 40 .4byte 0 // PointerToSymbolTable 41 .4byte 1 // 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 _edata - _start // SizeOfCode 52 .4byte 0 // SizeOfInitializedData 53 .4byte 0 // SizeOfUninitializedData 54 .4byte _start - ImageBase // AddressOfEntryPoint 55 .4byte _start - ImageBase // BaseOfCode 56 57extra_header_fields: 58 .8byte 0 // ImageBase 59 .4byte 0x20 // SectionAlignment 60 .4byte 0x8 // 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 _edata - ImageBase // SizeOfImage 70 71 // Everything before the kernel image is considered part of the header 72 .4byte _start - 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 .8byte 0 // BaseRelocationTable 89 .8byte 0 // Debug 90 .8byte 0 // Architecture 91 .8byte 0 // Global Ptr 92 .8byte 0 // TLS Table 93 .8byte 0 // Load Config Table 94 .8byte 0 // Bound Import 95 .8byte 0 // IAT 96 .8byte 0 // Delay Import Descriptor 97 .8byte 0 // CLR Runtime Header 98 .8byte 0 // Reserved, must be zero 99 100 // Section table 101section_table: 102 103 /* 104 * The EFI application loader requires a relocation section 105 * because EFI applications must be relocatable. This is a 106 * dummy section as far as we are concerned. 107 */ 108 .ascii ".reloc" 109 .byte 0 110 .byte 0 // end of 0 padding of section name 111 .4byte 0 112 .4byte 0 113 .4byte 0 // SizeOfRawData 114 .4byte 0 // PointerToRawData 115 .4byte 0 // PointerToRelocations 116 .4byte 0 // PointerToLineNumbers 117 .2byte 0 // NumberOfRelocations 118 .2byte 0 // NumberOfLineNumbers 119 .4byte 0x42100040 // Characteristics (section flags) 120 121 122 .ascii ".text" 123 .byte 0 124 .byte 0 125 .byte 0 // end of 0 padding of section name 126 .4byte _edata - _start // VirtualSize 127 .4byte _start - ImageBase // VirtualAddress 128 .4byte _edata - _start // SizeOfRawData 129 .4byte _start - ImageBase // PointerToRawData 130 131 .4byte 0 // PointerToRelocations (0 for executables) 132 .4byte 0 // PointerToLineNumbers (0 for executables) 133 .2byte 0 // NumberOfRelocations (0 for executables) 134 .2byte 0 // NumberOfLineNumbers (0 for executables) 135 .4byte 0xe0500020 // Characteristics (section flags) 136 137 .align 4 138 139 .globl _start 140 .type _start, @function 141_start: 142 addi.d $sp, $sp, -24 143 st.d $ra, $sp, 0 144 st.d $a0, $sp, 8 145 st.d $a1, $sp, 16 146 147 move $a2, $a0 // a2: ImageHandle 148 move $a3, $a1 // a3: SystemTable 149 la.local $a0, ImageBase // a0: ImageBase 150 la.local $a1, _DYNAMIC // a1: DynamicSection 151 bl _relocate 152 bnez $a0, 0f 153 154 ld.d $a0, $sp, 8 155 ld.d $a1, $sp, 16 156 bl efi_main 157 1580: ld.d $ra, $sp, 0 159 addi.d $sp, $sp, 24 160 jr $ra 161 .end _start 162