| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2013 - 2017 Linaro, Ltd. |
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| 4 | * Copyright (C) 2013, 2014 Red Hat, Inc. |
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| 5 | */ |
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| 6 | |
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| 7 | #include <linux/pe.h> |
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| 8 | #include <linux/sizes.h> |
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| 9 | |
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| 10 | .macro efi_signature_nop |
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| 11 | #ifdef CONFIG_EFI |
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| 12 | .L_head: |
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| 13 | /* |
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| 14 | * This ccmp instruction has no meaningful effect except that |
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| 15 | * its opcode forms the magic "MZ" signature required by UEFI. |
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| 16 | */ |
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| 17 | ccmp x18, #0, #0xd, pl |
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| 18 | #else |
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| 19 | /* |
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| 20 | * Bootloaders may inspect the opcode at the start of the kernel |
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| 21 | * image to decide if the kernel is capable of booting via UEFI. |
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| 22 | * So put an ordinary NOP here, not the "MZ.." pseudo-nop above. |
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| 23 | */ |
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| 24 | nop |
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| 25 | #endif |
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| 26 | .endm |
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| 27 | |
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| 28 | .macro __EFI_PE_HEADER |
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| 29 | #ifdef CONFIG_EFI |
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| 30 | .set .Lpe_header_offset, . - .L_head |
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| 31 | .long PE_MAGIC |
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| 32 | .short IMAGE_FILE_MACHINE_ARM64 // Machine |
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| 33 | .short .Lsection_count // NumberOfSections |
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| 34 | .long 0 // TimeDateStamp |
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| 35 | .long 0 // PointerToSymbolTable |
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| 36 | .long 0 // NumberOfSymbols |
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| 37 | .short .Lsection_table - .Loptional_header // SizeOfOptionalHeader |
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| 38 | .short IMAGE_FILE_DEBUG_STRIPPED | \ |
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| 39 | IMAGE_FILE_EXECUTABLE_IMAGE | \ |
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| 40 | IMAGE_FILE_LINE_NUMS_STRIPPED // Characteristics |
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| 41 | |
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| 42 | .Loptional_header: |
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| 43 | .short PE_OPT_MAGIC_PE32PLUS // PE32+ format |
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| 44 | .byte 0x02 // MajorLinkerVersion |
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| 45 | .byte 0x14 // MinorLinkerVersion |
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| 46 | .long __initdata_begin - .Lefi_header_end // SizeOfCode |
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| 47 | .long __pecoff_data_size // SizeOfInitializedData |
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| 48 | .long 0 // SizeOfUninitializedData |
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| 49 | .long __efistub_efi_pe_entry - .L_head // AddressOfEntryPoint |
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| 50 | .long .Lefi_header_end - .L_head // BaseOfCode |
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| 51 | |
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| 52 | .quad 0 // ImageBase |
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| 53 | .long SEGMENT_ALIGN // SectionAlignment |
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| 54 | .long PECOFF_FILE_ALIGNMENT // FileAlignment |
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| 55 | .short 0 // MajorOperatingSystemVersion |
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| 56 | .short 0 // MinorOperatingSystemVersion |
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| 57 | .short LINUX_EFISTUB_MAJOR_VERSION // MajorImageVersion |
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| 58 | .short LINUX_EFISTUB_MINOR_VERSION // MinorImageVersion |
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| 59 | .short 0 // MajorSubsystemVersion |
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| 60 | .short 0 // MinorSubsystemVersion |
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| 61 | .long 0 // Win32VersionValue |
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| 62 | |
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| 63 | .long _end - .L_head // SizeOfImage |
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| 64 | |
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| 65 | // Everything before the kernel image is considered part of the header |
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| 66 | .long .Lefi_header_end - .L_head // SizeOfHeaders |
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| 67 | .long 0 // CheckSum |
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| 68 | .short IMAGE_SUBSYSTEM_EFI_APPLICATION // Subsystem |
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| 69 | .short IMAGE_DLL_CHARACTERISTICS_NX_COMPAT // DllCharacteristics |
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| 70 | .quad 0 // SizeOfStackReserve |
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| 71 | .quad 0 // SizeOfStackCommit |
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| 72 | .quad 0 // SizeOfHeapReserve |
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| 73 | .quad 0 // SizeOfHeapCommit |
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| 74 | .long 0 // LoaderFlags |
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| 75 | .long (.Lsection_table - .) / 8 // NumberOfRvaAndSizes |
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| 76 | |
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| 77 | .quad 0 // ExportTable |
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| 78 | .quad 0 // ImportTable |
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| 79 | .quad 0 // ResourceTable |
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| 80 | .quad 0 // ExceptionTable |
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| 81 | .quad 0 // CertificationTable |
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| 82 | .quad 0 // BaseRelocationTable |
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| 83 | |
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| 84 | #if defined(CONFIG_DEBUG_EFI) || defined(CONFIG_ARM64_BTI_KERNEL) |
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| 85 | .long .Lefi_debug_table - .L_head // DebugTable |
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| 86 | .long .Lefi_debug_table_size |
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| 87 | |
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| 88 | /* |
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| 89 | * The debug table is referenced via its Relative Virtual Address (RVA), |
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| 90 | * which is only defined for those parts of the image that are covered |
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| 91 | * by a section declaration. Since this header is not covered by any |
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| 92 | * section, the debug table must be emitted elsewhere. So stick it in |
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| 93 | * the .init.rodata section instead. |
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| 94 | * |
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| 95 | * Note that the payloads themselves are permitted to have zero RVAs, |
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| 96 | * which means we can simply put those right after the section headers. |
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| 97 | */ |
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| 98 | __INITRODATA |
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| 99 | |
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| 100 | .align 2 |
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| 101 | .Lefi_debug_table: |
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| 102 | #ifdef CONFIG_DEBUG_EFI |
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| 103 | // EFI_IMAGE_DEBUG_DIRECTORY_ENTRY |
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| 104 | .long 0 // Characteristics |
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| 105 | .long 0 // TimeDateStamp |
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| 106 | .short 0 // MajorVersion |
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| 107 | .short 0 // MinorVersion |
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| 108 | .long IMAGE_DEBUG_TYPE_CODEVIEW // Type |
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| 109 | .long .Lefi_debug_entry_size // SizeOfData |
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| 110 | .long 0 // RVA |
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| 111 | .long .Lefi_debug_entry - .L_head // FileOffset |
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| 112 | #endif |
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| 113 | #ifdef CONFIG_ARM64_BTI_KERNEL |
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| 114 | .long 0 // Characteristics |
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| 115 | .long 0 // TimeDateStamp |
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| 116 | .short 0 // MajorVersion |
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| 117 | .short 0 // MinorVersion |
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| 118 | .long IMAGE_DEBUG_TYPE_EX_DLLCHARACTERISTICS // Type |
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| 119 | .long 4 // SizeOfData |
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| 120 | .long 0 // RVA |
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| 121 | .long .Lefi_dll_characteristics_ex - .L_head // FileOffset |
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| 122 | #endif |
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| 123 | .set .Lefi_debug_table_size, . - .Lefi_debug_table |
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| 124 | .previous |
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| 125 | #endif |
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| 126 | |
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| 127 | // Section table |
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| 128 | .Lsection_table: |
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| 129 | .ascii ".text\0\0\0" |
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| 130 | .long __initdata_begin - .Lefi_header_end // VirtualSize |
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| 131 | .long .Lefi_header_end - .L_head // VirtualAddress |
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| 132 | .long __initdata_begin - .Lefi_header_end // SizeOfRawData |
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| 133 | .long .Lefi_header_end - .L_head // PointerToRawData |
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| 134 | |
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| 135 | .long 0 // PointerToRelocations |
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| 136 | .long 0 // PointerToLineNumbers |
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| 137 | .short 0 // NumberOfRelocations |
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| 138 | .short 0 // NumberOfLineNumbers |
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| 139 | .long IMAGE_SCN_CNT_CODE | \ |
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| 140 | IMAGE_SCN_MEM_READ | \ |
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| 141 | IMAGE_SCN_MEM_EXECUTE // Characteristics |
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| 142 | |
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| 143 | .ascii ".data\0\0\0" |
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| 144 | .long __pecoff_data_size // VirtualSize |
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| 145 | .long __initdata_begin - .L_head // VirtualAddress |
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| 146 | .long __pecoff_data_rawsize // SizeOfRawData |
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| 147 | .long __initdata_begin - .L_head // PointerToRawData |
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| 148 | |
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| 149 | .long 0 // PointerToRelocations |
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| 150 | .long 0 // PointerToLineNumbers |
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| 151 | .short 0 // NumberOfRelocations |
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| 152 | .short 0 // NumberOfLineNumbers |
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| 153 | .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ |
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| 154 | IMAGE_SCN_MEM_READ | \ |
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| 155 | IMAGE_SCN_MEM_WRITE // Characteristics |
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| 156 | |
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| 157 | .set .Lsection_count, (. - .Lsection_table) / 40 |
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| 158 | |
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| 159 | #ifdef CONFIG_DEBUG_EFI |
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| 160 | .Lefi_debug_entry: |
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| 161 | // EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY |
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| 162 | .ascii "NB10" // Signature |
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| 163 | .long 0 // Unknown |
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| 164 | .long 0 // Unknown2 |
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| 165 | .long 0 // Unknown3 |
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| 166 | |
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| 167 | .asciz VMLINUX_PATH |
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| 168 | |
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| 169 | .set .Lefi_debug_entry_size, . - .Lefi_debug_entry |
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| 170 | #endif |
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| 171 | #ifdef CONFIG_ARM64_BTI_KERNEL |
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| 172 | .Lefi_dll_characteristics_ex: |
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| 173 | .long IMAGE_DLLCHARACTERISTICS_EX_FORWARD_CFI_COMPAT |
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| 174 | #endif |
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| 175 | |
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| 176 | .balign SEGMENT_ALIGN |
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| 177 | .Lefi_header_end: |
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| 178 | #else |
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| 179 | .set .Lpe_header_offset, 0x0 |
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| 180 | #endif |
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| 181 | .endm |
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| 182 | |
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