crt0-efi-mips64el.S revision 1.1.1.1.2.2
1 /* $NetBSD: crt0-efi-mips64el.S,v 1.1.1.1.2.2 2018/09/06 06:56:38 pgoyette Exp $ */ 2 3 /* 4 * crt0-efi-mips64el.S - PE/COFF header for MIPS64 EFI applications 5 * 6 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel (at) linaro.org> 7 * Copright (C) 2017 Heiher <r (at) hev.cc> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice and this list of conditions, without modification. 14 * 2. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License as published by the Free Software Foundation; 19 * either version 2 of the License, or (at your option) any later version. 20 */ 21 22 .section .text.head 23 24 /* 25 * Magic "MZ" signature for PE/COFF 26 */ 27 .globl ImageBase 28 ImageBase: 29 .ascii "MZ" 30 .skip 58 // 'MZ' + pad + offset == 64 31 .long pe_header - ImageBase // Offset to the PE header. 32 pe_header: 33 .ascii "PE" 34 .short 0 35 coff_header: 36 .short 0x166 // MIPS little endian 37 .short 2 // nr_sections 38 .long 0 // TimeDateStamp 39 .long 0 // PointerToSymbolTable 40 .long 1 // NumberOfSymbols 41 .short section_table - optional_header // SizeOfOptionalHeader 42 .short 0x206 // Characteristics. 43 // IMAGE_FILE_DEBUG_STRIPPED | 44 // IMAGE_FILE_EXECUTABLE_IMAGE | 45 // IMAGE_FILE_LINE_NUMS_STRIPPED 46 optional_header: 47 .short 0x20b // PE32+ format 48 .byte 0x02 // MajorLinkerVersion 49 .byte 0x14 // MinorLinkerVersion 50 .long _edata - _start // SizeOfCode 51 .long 0 // SizeOfInitializedData 52 .long 0 // SizeOfUninitializedData 53 .long _start - ImageBase // AddressOfEntryPoint 54 .long _start - ImageBase // BaseOfCode 55 56 extra_header_fields: 57 .quad 0 // ImageBase 58 .long 0x20 // SectionAlignment 59 .long 0x8 // FileAlignment 60 .short 0 // MajorOperatingSystemVersion 61 .short 0 // MinorOperatingSystemVersion 62 .short 0 // MajorImageVersion 63 .short 0 // MinorImageVersion 64 .short 0 // MajorSubsystemVersion 65 .short 0 // MinorSubsystemVersion 66 .long 0 // Win32VersionValue 67 68 .long _edata - ImageBase // SizeOfImage 69 70 // Everything before the kernel image is considered part of the header 71 .long _start - ImageBase // SizeOfHeaders 72 .long 0 // CheckSum 73 .short EFI_SUBSYSTEM // Subsystem 74 .short 0 // DllCharacteristics 75 .quad 0 // SizeOfStackReserve 76 .quad 0 // SizeOfStackCommit 77 .quad 0 // SizeOfHeapReserve 78 .quad 0 // SizeOfHeapCommit 79 .long 0 // LoaderFlags 80 .long 0x6 // NumberOfRvaAndSizes 81 82 .quad 0 // ExportTable 83 .quad 0 // ImportTable 84 .quad 0 // ResourceTable 85 .quad 0 // ExceptionTable 86 .quad 0 // CertificationTable 87 .quad 0 // BaseRelocationTable 88 89 // Section table 90 section_table: 91 92 /* 93 * The EFI application loader requires a relocation section 94 * because EFI applications must be relocatable. This is a 95 * dummy section as far as we are concerned. 96 */ 97 .ascii ".reloc" 98 .byte 0 99 .byte 0 // end of 0 padding of section name 100 .long 0 101 .long 0 102 .long 0 // SizeOfRawData 103 .long 0 // PointerToRawData 104 .long 0 // PointerToRelocations 105 .long 0 // PointerToLineNumbers 106 .short 0 // NumberOfRelocations 107 .short 0 // NumberOfLineNumbers 108 .long 0x42100040 // Characteristics (section flags) 109 110 111 .ascii ".text" 112 .byte 0 113 .byte 0 114 .byte 0 // end of 0 padding of section name 115 .long _edata - _start // VirtualSize 116 .long _start - ImageBase // VirtualAddress 117 .long _edata - _start // SizeOfRawData 118 .long _start - ImageBase // PointerToRawData 119 120 .long 0 // PointerToRelocations (0 for executables) 121 .long 0 // PointerToLineNumbers (0 for executables) 122 .short 0 // NumberOfRelocations (0 for executables) 123 .short 0 // NumberOfLineNumbers (0 for executables) 124 .long 0xe0500020 // Characteristics (section flags) 125 126 .set push 127 .set noreorder 128 .align 4 129 130 .globl _start 131 .ent _start 132 .type _start, @function 133 _start: 134 daddiu $sp, -32 135 sd $ra, ($sp) 136 137 // Get pc & gp 138 .align 3 139 bal 1f 140 sd $gp, 8($sp) 141 _pc: 142 .dword _gp 143 .dword _DYNAMIC 144 .dword _relocate 145 1: 146 // pc in ra 147 ld $gp, ($ra) 148 dli $t0, _pc 149 dsubu $gp, $t0 150 daddu $gp, $ra 151 152 sd $a0, 16($sp) 153 sd $a1, 24($sp) 154 155 // a2: ImageHandle 156 move $a2, $a0 157 // a3: SystemTable 158 move $a3, $a1 159 // a0: ImageBase 160 dli $t1, ImageBase - _pc 161 daddu $a0, $ra, $t1 162 // a1: DynamicSection 163 ld $t1, 8($ra) 164 dsubu $t1, $t0 165 daddu $a1, $ra, $t1 166 // call _relocate 167 ld $t1, 16($ra) 168 dsubu $t1, $t0 169 daddu $t9, $ra, $t1 170 jalr $t9 171 nop 172 bnez $v0, 1b 173 nop 174 175 // a0: ImageHandle 176 ld $a0, 16($sp) 177 // call efi_main 178 dla $t9, efi_main 179 jalr $t9 180 // a1: SystemTable 181 ld $a1, 24($sp) 182 183 1: 184 ld $gp, 8($sp) 185 ld $ra, ($sp) 186 jr $ra 187 daddiu $sp, 32 188 .end _start 189 190 .set pop 191
Indexes created Mon Oct 13 08:09:50 GMT 2025