| Roy Franz | 81a0bc3 | 2015-09-23 20:17:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013-2015 Linaro Ltd |
| 3 | * Authors: Roy Franz <roy.franz@linaro.org> |
| 4 | * Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | .macro __nop |
| 12 | #ifdef CONFIG_EFI_STUB |
| 13 | @ This is almost but not quite a NOP, since it does clobber the |
| 14 | @ condition flags. But it is the best we can do for EFI, since |
| 15 | @ PE/COFF expects the magic string "MZ" at offset 0, while the |
| 16 | @ ARM/Linux boot protocol expects an executable instruction |
| 17 | @ there. |
| 18 | .inst 'M' | ('Z' << 8) | (0x1310 << 16) @ tstne r0, #0x4d000 |
| 19 | #else |
| 20 | mov r0, r0 |
| 21 | #endif |
| 22 | .endm |
| 23 | |
| 24 | .macro __EFI_HEADER |
| 25 | #ifdef CONFIG_EFI_STUB |
| 26 | b __efi_start |
| 27 | |
| 28 | .set start_offset, __efi_start - start |
| 29 | .org start + 0x3c |
| 30 | @ |
| 31 | @ The PE header can be anywhere in the file, but for |
| 32 | @ simplicity we keep it together with the MSDOS header |
| 33 | @ The offset to the PE/COFF header needs to be at offset |
| 34 | @ 0x3C in the MSDOS header. |
| 35 | @ The only 2 fields of the MSDOS header that are used are this |
| 36 | @ PE/COFF offset, and the "MZ" bytes at offset 0x0. |
| 37 | @ |
| 38 | .long pe_header - start @ Offset to the PE header. |
| 39 | |
| 40 | pe_header: |
| 41 | .ascii "PE\0\0" |
| 42 | |
| 43 | coff_header: |
| 44 | .short 0x01c2 @ ARM or Thumb |
| 45 | .short 2 @ nr_sections |
| 46 | .long 0 @ TimeDateStamp |
| 47 | .long 0 @ PointerToSymbolTable |
| 48 | .long 1 @ NumberOfSymbols |
| 49 | .short section_table - optional_header |
| 50 | @ SizeOfOptionalHeader |
| 51 | .short 0x306 @ Characteristics. |
| 52 | @ IMAGE_FILE_32BIT_MACHINE | |
| 53 | @ IMAGE_FILE_DEBUG_STRIPPED | |
| 54 | @ IMAGE_FILE_EXECUTABLE_IMAGE | |
| 55 | @ IMAGE_FILE_LINE_NUMS_STRIPPED |
| 56 | |
| 57 | optional_header: |
| 58 | .short 0x10b @ PE32 format |
| 59 | .byte 0x02 @ MajorLinkerVersion |
| 60 | .byte 0x14 @ MinorLinkerVersion |
| 61 | .long _end - __efi_start @ SizeOfCode |
| 62 | .long 0 @ SizeOfInitializedData |
| 63 | .long 0 @ SizeOfUninitializedData |
| 64 | .long efi_stub_entry - start @ AddressOfEntryPoint |
| 65 | .long start_offset @ BaseOfCode |
| 66 | .long 0 @ data |
| 67 | |
| 68 | extra_header_fields: |
| 69 | .long 0 @ ImageBase |
| 70 | .long 0x200 @ SectionAlignment |
| 71 | .long 0x200 @ FileAlignment |
| 72 | .short 0 @ MajorOperatingSystemVersion |
| 73 | .short 0 @ MinorOperatingSystemVersion |
| 74 | .short 0 @ MajorImageVersion |
| 75 | .short 0 @ MinorImageVersion |
| 76 | .short 0 @ MajorSubsystemVersion |
| 77 | .short 0 @ MinorSubsystemVersion |
| 78 | .long 0 @ Win32VersionValue |
| 79 | |
| 80 | .long _end - start @ SizeOfImage |
| 81 | .long start_offset @ SizeOfHeaders |
| 82 | .long 0 @ CheckSum |
| 83 | .short 0xa @ Subsystem (EFI application) |
| 84 | .short 0 @ DllCharacteristics |
| 85 | .long 0 @ SizeOfStackReserve |
| 86 | .long 0 @ SizeOfStackCommit |
| 87 | .long 0 @ SizeOfHeapReserve |
| 88 | .long 0 @ SizeOfHeapCommit |
| 89 | .long 0 @ LoaderFlags |
| 90 | .long 0x6 @ NumberOfRvaAndSizes |
| 91 | |
| 92 | .quad 0 @ ExportTable |
| 93 | .quad 0 @ ImportTable |
| 94 | .quad 0 @ ResourceTable |
| 95 | .quad 0 @ ExceptionTable |
| 96 | .quad 0 @ CertificationTable |
| 97 | .quad 0 @ BaseRelocationTable |
| 98 | |
| 99 | section_table: |
| 100 | @ |
| 101 | @ The EFI application loader requires a relocation section |
| 102 | @ because EFI applications must be relocatable. This is a |
| 103 | @ dummy section as far as we are concerned. |
| 104 | @ |
| 105 | .ascii ".reloc\0\0" |
| 106 | .long 0 @ VirtualSize |
| 107 | .long 0 @ VirtualAddress |
| 108 | .long 0 @ SizeOfRawData |
| 109 | .long 0 @ PointerToRawData |
| 110 | .long 0 @ PointerToRelocations |
| 111 | .long 0 @ PointerToLineNumbers |
| 112 | .short 0 @ NumberOfRelocations |
| 113 | .short 0 @ NumberOfLineNumbers |
| 114 | .long 0x42100040 @ Characteristics |
| 115 | |
| 116 | .ascii ".text\0\0\0" |
| 117 | .long _end - __efi_start @ VirtualSize |
| 118 | .long __efi_start @ VirtualAddress |
| 119 | .long _edata - __efi_start @ SizeOfRawData |
| 120 | .long __efi_start @ PointerToRawData |
| 121 | .long 0 @ PointerToRelocations |
| 122 | .long 0 @ PointerToLineNumbers |
| 123 | .short 0 @ NumberOfRelocations |
| 124 | .short 0 @ NumberOfLineNumbers |
| 125 | .long 0xe0500020 @ Characteristics |
| 126 | |
| 127 | .align 9 |
| 128 | __efi_start: |
| 129 | #endif |
| 130 | .endm |