1 1.1 jmcneill /* $NetBSD: crt0-efi-arm.S,v 1.1.1.2 2021/09/30 18:50:09 jmcneill Exp $ */ 2 1.1 jmcneill 3 1.1 jmcneill /* 4 1.1 jmcneill * crt0-efi-arm.S - PE/COFF header for ARM EFI applications 5 1.1 jmcneill * 6 1.1 jmcneill * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel (at) linaro.org> 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 .section .text.head 22 1.1 jmcneill 23 1.1 jmcneill /* 24 1.1 jmcneill * Magic "MZ" signature for PE/COFF 25 1.1 jmcneill */ 26 1.1 jmcneill .globl ImageBase 27 1.1 jmcneill ImageBase: 28 1.1 jmcneill .ascii "MZ" 29 1.1 jmcneill .skip 58 // 'MZ' + pad + offset == 64 30 1.1 jmcneill .long pe_header - ImageBase // Offset to the PE header. 31 1.1 jmcneill pe_header: 32 1.1 jmcneill .ascii "PE" 33 1.1 jmcneill .short 0 34 1.1 jmcneill coff_header: 35 1.1 jmcneill .short 0x1c2 // Mixed ARM/Thumb 36 1.1 jmcneill .short 2 // nr_sections 37 1.1 jmcneill .long 0 // TimeDateStamp 38 1.1 jmcneill .long 0 // PointerToSymbolTable 39 1.1.1.2 jmcneill .long 0 // NumberOfSymbols 40 1.1 jmcneill .short section_table - optional_header // SizeOfOptionalHeader 41 1.1 jmcneill .short 0x306 // Characteristics. 42 1.1 jmcneill // IMAGE_FILE_32BIT_MACHINE | 43 1.1 jmcneill // IMAGE_FILE_DEBUG_STRIPPED | 44 1.1 jmcneill // IMAGE_FILE_EXECUTABLE_IMAGE | 45 1.1 jmcneill // IMAGE_FILE_LINE_NUMS_STRIPPED 46 1.1 jmcneill optional_header: 47 1.1 jmcneill .short 0x10b // PE32+ format 48 1.1 jmcneill .byte 0x02 // MajorLinkerVersion 49 1.1 jmcneill .byte 0x14 // MinorLinkerVersion 50 1.1 jmcneill .long _edata - _start // SizeOfCode 51 1.1 jmcneill .long 0 // SizeOfInitializedData 52 1.1 jmcneill .long 0 // SizeOfUninitializedData 53 1.1 jmcneill .long _start - ImageBase // AddressOfEntryPoint 54 1.1 jmcneill .long _start - ImageBase // BaseOfCode 55 1.1 jmcneill .long 0 // BaseOfData 56 1.1 jmcneill 57 1.1 jmcneill extra_header_fields: 58 1.1 jmcneill .long 0 // ImageBase 59 1.1 jmcneill .long 0x20 // SectionAlignment 60 1.1 jmcneill .long 0x8 // FileAlignment 61 1.1 jmcneill .short 0 // MajorOperatingSystemVersion 62 1.1 jmcneill .short 0 // MinorOperatingSystemVersion 63 1.1 jmcneill .short 0 // MajorImageVersion 64 1.1 jmcneill .short 0 // MinorImageVersion 65 1.1 jmcneill .short 0 // MajorSubsystemVersion 66 1.1 jmcneill .short 0 // MinorSubsystemVersion 67 1.1 jmcneill .long 0 // Win32VersionValue 68 1.1 jmcneill 69 1.1 jmcneill .long _edata - ImageBase // SizeOfImage 70 1.1 jmcneill 71 1.1 jmcneill // Everything before the kernel image is considered part of the header 72 1.1 jmcneill .long _start - ImageBase // SizeOfHeaders 73 1.1 jmcneill .long 0 // CheckSum 74 1.1 jmcneill .short EFI_SUBSYSTEM // Subsystem 75 1.1 jmcneill .short 0 // DllCharacteristics 76 1.1 jmcneill .long 0 // SizeOfStackReserve 77 1.1 jmcneill .long 0 // SizeOfStackCommit 78 1.1 jmcneill .long 0 // SizeOfHeapReserve 79 1.1 jmcneill .long 0 // SizeOfHeapCommit 80 1.1 jmcneill .long 0 // LoaderFlags 81 1.1 jmcneill .long 0x6 // NumberOfRvaAndSizes 82 1.1 jmcneill 83 1.1 jmcneill .quad 0 // ExportTable 84 1.1 jmcneill .quad 0 // ImportTable 85 1.1 jmcneill .quad 0 // ResourceTable 86 1.1 jmcneill .quad 0 // ExceptionTable 87 1.1 jmcneill .quad 0 // CertificationTable 88 1.1 jmcneill .quad 0 // BaseRelocationTable 89 1.1 jmcneill 90 1.1 jmcneill // Section table 91 1.1 jmcneill section_table: 92 1.1 jmcneill 93 1.1 jmcneill /* 94 1.1 jmcneill * The EFI application loader requires a relocation section 95 1.1 jmcneill * because EFI applications must be relocatable. This is a 96 1.1 jmcneill * dummy section as far as we are concerned. 97 1.1 jmcneill */ 98 1.1 jmcneill .ascii ".reloc" 99 1.1 jmcneill .byte 0 100 1.1 jmcneill .byte 0 // end of 0 padding of section name 101 1.1 jmcneill .long 0 102 1.1 jmcneill .long 0 103 1.1 jmcneill .long 0 // SizeOfRawData 104 1.1 jmcneill .long 0 // PointerToRawData 105 1.1 jmcneill .long 0 // PointerToRelocations 106 1.1 jmcneill .long 0 // PointerToLineNumbers 107 1.1 jmcneill .short 0 // NumberOfRelocations 108 1.1 jmcneill .short 0 // NumberOfLineNumbers 109 1.1 jmcneill .long 0x42100040 // Characteristics (section flags) 110 1.1 jmcneill 111 1.1 jmcneill 112 1.1 jmcneill .ascii ".text" 113 1.1 jmcneill .byte 0 114 1.1 jmcneill .byte 0 115 1.1 jmcneill .byte 0 // end of 0 padding of section name 116 1.1 jmcneill .long _edata - _start // VirtualSize 117 1.1 jmcneill .long _start - ImageBase // VirtualAddress 118 1.1 jmcneill .long _edata - _start // SizeOfRawData 119 1.1 jmcneill .long _start - ImageBase // PointerToRawData 120 1.1 jmcneill 121 1.1 jmcneill .long 0 // PointerToRelocations (0 for executables) 122 1.1 jmcneill .long 0 // PointerToLineNumbers (0 for executables) 123 1.1 jmcneill .short 0 // NumberOfRelocations (0 for executables) 124 1.1 jmcneill .short 0 // NumberOfLineNumbers (0 for executables) 125 1.1 jmcneill .long 0xe0500020 // Characteristics (section flags) 126 1.1 jmcneill 127 1.1 jmcneill _start: 128 1.1 jmcneill stmfd sp!, {r0-r2, lr} 129 1.1 jmcneill 130 1.1 jmcneill mov r2, r0 131 1.1 jmcneill mov r3, r1 132 1.1 jmcneill adr r1, .L_DYNAMIC 133 1.1 jmcneill ldr r0, [r1] 134 1.1 jmcneill add r1, r0, r1 135 1.1 jmcneill adr r0, ImageBase 136 1.1 jmcneill bl _relocate 137 1.1 jmcneill teq r0, #0 138 1.1 jmcneill bne 0f 139 1.1 jmcneill 140 1.1 jmcneill ldmfd sp, {r0-r1} 141 1.1 jmcneill bl efi_main 142 1.1 jmcneill 143 1.1 jmcneill 0: add sp, sp, #12 144 1.1 jmcneill ldr pc, [sp], #4 145 1.1 jmcneill 146 1.1 jmcneill .L_DYNAMIC: 147 1.1 jmcneill .word _DYNAMIC - . 148
Indexes created Sun Oct 12 09:09:55 GMT 2025