1 1.1 jmcneill /* $NetBSD: crt0-efi-riscv64.S,v 1.1.1.1 2021/09/30 18:50:09 jmcneill Exp $ */ 2 1.1 jmcneill 3 1.1 jmcneill /* SPDX-License-Identifier: GPL-2.0+ */ 4 1.1 jmcneill /* 5 1.1 jmcneill * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel (at) linaro.org> 6 1.1 jmcneill * Copright (C) 2018 Alexander Graf <agraf (at) suse.de> 7 1.1 jmcneill * 8 1.1 jmcneill * Redistribution and use in source and binary forms, with or without 9 1.1 jmcneill * modification, are permitted provided that the following conditions 10 1.1 jmcneill * are met: 11 1.1 jmcneill * 1. Redistributions of source code must retain the above copyright 12 1.1 jmcneill * notice and this list of conditions, without modification. 13 1.1 jmcneill * 2. The name of the author may not be used to endorse or promote products 14 1.1 jmcneill * derived from this software without specific prior written permission. 15 1.1 jmcneill * 16 1.1 jmcneill * Alternatively, this software may be distributed under the terms of the 17 1.1 jmcneill * GNU General Public License as published by the Free Software Foundation; 18 1.1 jmcneill * either version 2 of the License, or (at your option) any later version. 19 1.1 jmcneill */ 20 1.1 jmcneill 21 1.1 jmcneill #ifndef EFI_SUBSYSTEM 22 1.1 jmcneill #define EFI_SUBSYSTEM 10 23 1.1 jmcneill #endif 24 1.1 jmcneill 25 1.1 jmcneill .section .text.head 26 1.1 jmcneill 27 1.1 jmcneill /* 28 1.1 jmcneill * Magic "MZ" signature for PE/COFF 29 1.1 jmcneill */ 30 1.1 jmcneill .globl ImageBase 31 1.1 jmcneill ImageBase: 32 1.1 jmcneill .ascii "MZ" 33 1.1 jmcneill .skip 58 // 'MZ' + pad + offset == 64 34 1.1 jmcneill .long pe_header - ImageBase // Offset to the PE header. 35 1.1 jmcneill pe_header: 36 1.1 jmcneill .ascii "PE" 37 1.1 jmcneill .short 0 38 1.1 jmcneill coff_header: 39 1.1 jmcneill .short 0x5064 // riscv64 40 1.1 jmcneill .short 2 // nr_sections 41 1.1 jmcneill .long 0 // TimeDateStamp 42 1.1 jmcneill .long 0 // PointerToSymbolTable 43 1.1 jmcneill .long 0 // NumberOfSymbols 44 1.1 jmcneill .short section_table - optional_header // SizeOfOptionalHeader 45 1.1 jmcneill .short 0x206 // Characteristics. 46 1.1 jmcneill // IMAGE_FILE_DEBUG_STRIPPED | 47 1.1 jmcneill // IMAGE_FILE_EXECUTABLE_IMAGE | 48 1.1 jmcneill // IMAGE_FILE_LINE_NUMS_STRIPPED 49 1.1 jmcneill optional_header: 50 1.1 jmcneill .short 0x20b // PE32+ format 51 1.1 jmcneill .byte 0x02 // MajorLinkerVersion 52 1.1 jmcneill .byte 0x14 // MinorLinkerVersion 53 1.1 jmcneill .long _data - _start // SizeOfCode 54 1.1 jmcneill .long _data_size // SizeOfInitializedData 55 1.1 jmcneill .long 0 // SizeOfUninitializedData 56 1.1 jmcneill .long _start - ImageBase // AddressOfEntryPoint 57 1.1 jmcneill .long _start - ImageBase // BaseOfCode 58 1.1 jmcneill 59 1.1 jmcneill extra_header_fields: 60 1.1 jmcneill .quad 0 // ImageBase 61 1.1 jmcneill .long 0x1000 // SectionAlignment 62 1.1 jmcneill .long 0x200 // FileAlignment 63 1.1 jmcneill .short 0 // MajorOperatingSystemVersion 64 1.1 jmcneill .short 0 // MinorOperatingSystemVersion 65 1.1 jmcneill .short 0 // MajorImageVersion 66 1.1 jmcneill .short 0 // MinorImageVersion 67 1.1 jmcneill .short 0 // MajorSubsystemVersion 68 1.1 jmcneill .short 0 // MinorSubsystemVersion 69 1.1 jmcneill .long 0 // Win32VersionValue 70 1.1 jmcneill 71 1.1 jmcneill .long _edata - ImageBase // SizeOfImage 72 1.1 jmcneill 73 1.1 jmcneill // Everything before the kernel image is considered part of the header 74 1.1 jmcneill .long _start - ImageBase // SizeOfHeaders 75 1.1 jmcneill .long 0 // CheckSum 76 1.1 jmcneill .short EFI_SUBSYSTEM // Subsystem 77 1.1 jmcneill .short 0 // DllCharacteristics 78 1.1 jmcneill .quad 0 // SizeOfStackReserve 79 1.1 jmcneill .quad 0 // SizeOfStackCommit 80 1.1 jmcneill .quad 0 // SizeOfHeapReserve 81 1.1 jmcneill .quad 0 // SizeOfHeapCommit 82 1.1 jmcneill .long 0 // LoaderFlags 83 1.1 jmcneill .long 0x6 // NumberOfRvaAndSizes 84 1.1 jmcneill 85 1.1 jmcneill .quad 0 // ExportTable 86 1.1 jmcneill .quad 0 // ImportTable 87 1.1 jmcneill .quad 0 // ResourceTable 88 1.1 jmcneill .quad 0 // ExceptionTable 89 1.1 jmcneill .quad 0 // CertificationTable 90 1.1 jmcneill .quad 0 // BaseRelocationTable 91 1.1 jmcneill 92 1.1 jmcneill // Section table 93 1.1 jmcneill section_table: 94 1.1 jmcneill /* 95 1.1 jmcneill * The EFI application loader requires a relocation section 96 1.1 jmcneill * because EFI applications must be relocatable. This is a 97 1.1 jmcneill * dummy section as far as we are concerned. 98 1.1 jmcneill */ 99 1.1 jmcneill .ascii ".reloc\0\0" 100 1.1 jmcneill .long 0 101 1.1 jmcneill .long 0 102 1.1 jmcneill .long 0 // SizeOfRawData 103 1.1 jmcneill .long 0 // PointerToRawData 104 1.1 jmcneill .long 0 // PointerToRelocations 105 1.1 jmcneill .long 0 // PointerToLineNumbers 106 1.1 jmcneill .short 0 // NumberOfRelocations 107 1.1 jmcneill .short 0 // NumberOfLineNumbers 108 1.1 jmcneill .long 0x42100040 // Characteristics (section flags) 109 1.1 jmcneill 110 1.1 jmcneill .ascii ".text\0\0\0" 111 1.1 jmcneill .long _edata - _start // VirtualSize 112 1.1 jmcneill .long _start - ImageBase // VirtualAddress 113 1.1 jmcneill .long _edata - _start // SizeOfRawData 114 1.1 jmcneill .long _start - ImageBase // PointerToRawData 115 1.1 jmcneill 116 1.1 jmcneill .long 0 // PointerToRelocations (0 for executables) 117 1.1 jmcneill .long 0 // PointerToLineNumbers (0 for executables) 118 1.1 jmcneill .short 0 // NumberOfRelocations (0 for executables) 119 1.1 jmcneill .short 0 // NumberOfLineNumbers (0 for executables) 120 1.1 jmcneill .long 0xe0500020 // Characteristics (section flags) 121 1.1 jmcneill 122 1.1 jmcneill .align 12 123 1.1 jmcneill .globl _start 124 1.1 jmcneill _start: 125 1.1 jmcneill addi sp, sp, -24 126 1.1 jmcneill sd a0, 0(sp) 127 1.1 jmcneill sd a1, 8(sp) 128 1.1 jmcneill sd ra, 16(sp) 129 1.1 jmcneill lla a0, ImageBase 130 1.1 jmcneill lla a1, _DYNAMIC 131 1.1 jmcneill call _relocate 132 1.1 jmcneill bne a0, zero, 0f 133 1.1 jmcneill ld a1, 8(sp) 134 1.1 jmcneill ld a0, 0(sp) 135 1.1 jmcneill call efi_main 136 1.1 jmcneill ld ra, 16(sp) 137 1.1 jmcneill 0: addi sp, sp, 24 138 1.1 jmcneill ret 139