arch/riscv/kernel/efi-header.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
   4  * Adapted from arch/arm64/kernel/efi-header.S
   5  */
   6
   7 #include <linux/pe.h>
   8 #include <linux/sizes.h>
   9
  10         .macro  __EFI_PE_HEADER
  11         .long   PE_MAGIC
  12 coff_header:
  13 #ifdef CONFIG_64BIT
  14         .short  IMAGE_FILE_MACHINE_RISCV64              // Machine
  15 #else
  16         .short  IMAGE_FILE_MACHINE_RISCV32              // Machine
  17 #endif
  18         .short  section_count                           // NumberOfSections
  19         .long   0                                       // TimeDateStamp
  20         .long   0                                       // PointerToSymbolTable
  21         .long   0                                       // NumberOfSymbols
  22         .short  section_table - optional_header         // SizeOfOptionalHeader
  23         .short  IMAGE_FILE_DEBUG_STRIPPED | \
  24                 IMAGE_FILE_EXECUTABLE_IMAGE | \
  25                 IMAGE_FILE_LINE_NUMS_STRIPPED           // Characteristics
  26
  27 optional_header:
  28 #ifdef CONFIG_64BIT
  29         .short  PE_OPT_MAGIC_PE32PLUS                   // PE32+ format
  30 #else
  31         .short  PE_OPT_MAGIC_PE32                       // PE32 format
  32 #endif
  33         .byte   0x02                                    // MajorLinkerVersion
  34         .byte   0x14                                    // MinorLinkerVersion
  35         .long   __pecoff_text_end - efi_header_end      // SizeOfCode
  36         .long   __pecoff_data_virt_size                 // SizeOfInitializedData
  37         .long   0                                       // SizeOfUninitializedData
  38         .long   __efistub_efi_pe_entry - _start         // AddressOfEntryPoint
  39         .long   efi_header_end - _start                 // BaseOfCode
  40 #ifdef CONFIG_32BIT
  41         .long  __pecoff_text_end - _start               // BaseOfData
  42 #endif
  43
  44 extra_header_fields:
  45         .quad   0                                       // ImageBase
  46         .long   PECOFF_SECTION_ALIGNMENT                // SectionAlignment
  47         .long   PECOFF_FILE_ALIGNMENT                   // FileAlignment
  48         .short  0                                       // MajorOperatingSystemVersion
  49         .short  0                                       // MinorOperatingSystemVersion
  50         .short  LINUX_EFISTUB_MAJOR_VERSION             // MajorImageVersion
  51         .short  LINUX_EFISTUB_MINOR_VERSION             // MinorImageVersion
  52         .short  0                                       // MajorSubsystemVersion
  53         .short  0                                       // MinorSubsystemVersion
  54         .long   0                                       // Win32VersionValue
  55
  56         .long   _end - _start                           // SizeOfImage
  57
  58         // Everything before the kernel image is considered part of the header
  59         .long   efi_header_end - _start                 // SizeOfHeaders
  60         .long   0                                       // CheckSum
  61         .short  IMAGE_SUBSYSTEM_EFI_APPLICATION         // Subsystem
  62         .short  0                                       // DllCharacteristics
  63         .quad   0                                       // SizeOfStackReserve
  64         .quad   0                                       // SizeOfStackCommit
  65         .quad   0                                       // SizeOfHeapReserve
  66         .quad   0                                       // SizeOfHeapCommit
  67         .long   0                                       // LoaderFlags
  68         .long   (section_table - .) / 8                 // NumberOfRvaAndSizes
  69
  70         .quad   0                                       // ExportTable
  71         .quad   0                                       // ImportTable
  72         .quad   0                                       // ResourceTable
  73         .quad   0                                       // ExceptionTable
  74         .quad   0                                       // CertificationTable
  75         .quad   0                                       // BaseRelocationTable
  76
  77         // Section table
  78 section_table:
  79         .ascii  ".text\0\0\0"
  80         .long   __pecoff_text_end - efi_header_end      // VirtualSize
  81         .long   efi_header_end - _start                 // VirtualAddress
  82         .long   __pecoff_text_end - efi_header_end      // SizeOfRawData
  83         .long   efi_header_end - _start                 // PointerToRawData
  84
  85         .long   0                                       // PointerToRelocations
  86         .long   0                                       // PointerToLineNumbers
  87         .short  0                                       // NumberOfRelocations
  88         .short  0                                       // NumberOfLineNumbers
  89         .long   IMAGE_SCN_CNT_CODE | \
  90                 IMAGE_SCN_MEM_READ | \
  91                 IMAGE_SCN_MEM_EXECUTE                   // Characteristics
  92
  93         .ascii  ".data\0\0\0"
  94         .long   __pecoff_data_virt_size                 // VirtualSize
  95         .long   __pecoff_text_end - _start              // VirtualAddress
  96         .long   __pecoff_data_raw_size                  // SizeOfRawData
  97         .long   __pecoff_text_end - _start              // PointerToRawData
  98
  99         .long   0                                       // PointerToRelocations
 100         .long   0                                       // PointerToLineNumbers
 101         .short  0                                       // NumberOfRelocations
 102         .short  0                                       // NumberOfLineNumbers
 103         .long   IMAGE_SCN_CNT_INITIALIZED_DATA | \
 104                 IMAGE_SCN_MEM_READ | \
 105                 IMAGE_SCN_MEM_WRITE                     // Characteristics
 106
 107         .set    section_count, (. - section_table) / 40
 108
 109         .balign 0x1000
 110 efi_header_end:
 111         .endm