| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2013-2017 Linaro Ltd |
| 4 | * Authors: Roy Franz <roy.franz@linaro.org> |
| 5 | * Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <linux/pe.h> |
| 9 | #include <linux/sizes.h> |
| 10 | |
| 11 | .macro __nop |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 12 | AR_CLASS( mov r0, r0 ) |
| 13 | M_CLASS( nop.w ) |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 14 | .endm |
| 15 | |
| 16 | .macro __initial_nops |
| 17 | #ifdef CONFIG_EFI_STUB |
| 18 | @ This is a two-instruction NOP, which happens to bear the |
| 19 | @ PE/COFF signature "MZ" in the first two bytes, so the kernel |
| 20 | @ is accepted as an EFI binary. Booting via the UEFI stub |
| 21 | @ will not execute those instructions, but the ARM/Linux |
| 22 | @ boot protocol does, so we need some NOPs here. |
| 23 | .inst MZ_MAGIC | (0xe225 << 16) @ eor r5, r5, 0x4d000 |
| 24 | eor r5, r5, 0x4d000 @ undo previous insn |
| 25 | #else |
| 26 | __nop |
| 27 | __nop |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 28 | #endif |
| 29 | .endm |
| 30 | |
| 31 | .macro __EFI_HEADER |
| 32 | #ifdef CONFIG_EFI_STUB |
| 33 | .set start_offset, __efi_start - start |
| 34 | .org start + 0x3c |
| 35 | @ |
| 36 | @ The PE header can be anywhere in the file, but for |
| 37 | @ simplicity we keep it together with the MSDOS header |
| 38 | @ The offset to the PE/COFF header needs to be at offset |
| 39 | @ 0x3C in the MSDOS header. |
| 40 | @ The only 2 fields of the MSDOS header that are used are this |
| 41 | @ PE/COFF offset, and the "MZ" bytes at offset 0x0. |
| 42 | @ |
| 43 | .long pe_header - start @ Offset to the PE header. |
| 44 | |
| 45 | pe_header: |
| 46 | .long PE_MAGIC |
| 47 | |
| 48 | coff_header: |
| 49 | .short IMAGE_FILE_MACHINE_THUMB @ Machine |
| 50 | .short section_count @ NumberOfSections |
| 51 | .long 0 @ TimeDateStamp |
| 52 | .long 0 @ PointerToSymbolTable |
| 53 | .long 0 @ NumberOfSymbols |
| 54 | .short section_table - optional_header @ SizeOfOptionalHeader |
| 55 | .short IMAGE_FILE_32BIT_MACHINE | \ |
| 56 | IMAGE_FILE_DEBUG_STRIPPED | \ |
| 57 | IMAGE_FILE_EXECUTABLE_IMAGE | \ |
| 58 | IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics |
| 59 | |
| 60 | #define __pecoff_code_size (__pecoff_data_start - __efi_start) |
| 61 | |
| 62 | optional_header: |
| 63 | .short PE_OPT_MAGIC_PE32 @ PE32 format |
| 64 | .byte 0x02 @ MajorLinkerVersion |
| 65 | .byte 0x14 @ MinorLinkerVersion |
| 66 | .long __pecoff_code_size @ SizeOfCode |
| 67 | .long __pecoff_data_size @ SizeOfInitializedData |
| 68 | .long 0 @ SizeOfUninitializedData |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 69 | .long efi_pe_entry - start @ AddressOfEntryPoint |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 70 | .long start_offset @ BaseOfCode |
| 71 | .long __pecoff_data_start - start @ BaseOfData |
| 72 | |
| 73 | extra_header_fields: |
| 74 | .long 0 @ ImageBase |
| 75 | .long SZ_4K @ SectionAlignment |
| 76 | .long SZ_512 @ FileAlignment |
| 77 | .short 0 @ MajorOsVersion |
| 78 | .short 0 @ MinorOsVersion |
| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 79 | .short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion |
| 80 | .short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 81 | .short 0 @ MajorSubsystemVersion |
| 82 | .short 0 @ MinorSubsystemVersion |
| 83 | .long 0 @ Win32VersionValue |
| 84 | |
| 85 | .long __pecoff_end - start @ SizeOfImage |
| 86 | .long start_offset @ SizeOfHeaders |
| 87 | .long 0 @ CheckSum |
| 88 | .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem |
| 89 | .short 0 @ DllCharacteristics |
| 90 | .long 0 @ SizeOfStackReserve |
| 91 | .long 0 @ SizeOfStackCommit |
| 92 | .long 0 @ SizeOfHeapReserve |
| 93 | .long 0 @ SizeOfHeapCommit |
| 94 | .long 0 @ LoaderFlags |
| 95 | .long (section_table - .) / 8 @ NumberOfRvaAndSizes |
| 96 | |
| 97 | .quad 0 @ ExportTable |
| 98 | .quad 0 @ ImportTable |
| 99 | .quad 0 @ ResourceTable |
| 100 | .quad 0 @ ExceptionTable |
| 101 | .quad 0 @ CertificationTable |
| 102 | .quad 0 @ BaseRelocationTable |
| 103 | |
| 104 | section_table: |
| 105 | .ascii ".text\0\0\0" |
| 106 | .long __pecoff_code_size @ VirtualSize |
| 107 | .long __efi_start @ VirtualAddress |
| 108 | .long __pecoff_code_size @ SizeOfRawData |
| 109 | .long __efi_start @ PointerToRawData |
| 110 | .long 0 @ PointerToRelocations |
| 111 | .long 0 @ PointerToLineNumbers |
| 112 | .short 0 @ NumberOfRelocations |
| 113 | .short 0 @ NumberOfLineNumbers |
| 114 | .long IMAGE_SCN_CNT_CODE | \ |
| 115 | IMAGE_SCN_MEM_READ | \ |
| 116 | IMAGE_SCN_MEM_EXECUTE @ Characteristics |
| 117 | |
| 118 | .ascii ".data\0\0\0" |
| 119 | .long __pecoff_data_size @ VirtualSize |
| 120 | .long __pecoff_data_start - start @ VirtualAddress |
| 121 | .long __pecoff_data_rawsize @ SizeOfRawData |
| 122 | .long __pecoff_data_start - start @ PointerToRawData |
| 123 | .long 0 @ PointerToRelocations |
| 124 | .long 0 @ PointerToLineNumbers |
| 125 | .short 0 @ NumberOfRelocations |
| 126 | .short 0 @ NumberOfLineNumbers |
| 127 | .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ |
| 128 | IMAGE_SCN_MEM_READ | \ |
| 129 | IMAGE_SCN_MEM_WRITE @ Characteristics |
| 130 | |
| 131 | .set section_count, (. - section_table) / 40 |
| 132 | |
| 133 | .align 12 |
| 134 | __efi_start: |
| 135 | #endif |
| 136 | .endm |