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 #include <asm/set_memory.h>
  10
  11         .macro  __EFI_PE_HEADER
  12         .long   PE_MAGIC
  13 coff_header:
  14 #ifdef CONFIG_64BIT
  15         .short  IMAGE_FILE_MACHINE_RISCV64              // Machine
  16 #else
  17         .short  IMAGE_FILE_MACHINE_RISCV32              // Machine
  18 #endif
  19         .short  section_count                           // NumberOfSections
  20         .long   0                                       // TimeDateStamp
  21         .long   0                                       // PointerToSymbolTable
  22         .long   0                                       // NumberOfSymbols
  23         .short  section_table - optional_header         // SizeOfOptionalHeader
  24         .short  IMAGE_FILE_DEBUG_STRIPPED | \
  25                 IMAGE_FILE_EXECUTABLE_IMAGE | \
  26                 IMAGE_FILE_LINE_NUMS_STRIPPED           // Characteristics
  27
  28 optional_header:
  29 #ifdef CONFIG_64BIT
  30         .short  PE_OPT_MAGIC_PE32PLUS                   // PE32+ format
  31 #else
  32         .short  PE_OPT_MAGIC_PE32                       // PE32 format
  33 #endif
  34         .byte   0x02                                    // MajorLinkerVersion
  35         .byte   0x14                                    // MinorLinkerVersion
  36         .long   __pecoff_text_end - efi_header_end      // SizeOfCode
  37 #ifdef __clang__
  38         .long   __pecoff_data_virt_size                 // SizeOfInitializedData
  39 #else
  40         .long   __pecoff_data_virt_end - __pecoff_text_end      // SizeOfInitializedData
  41 #endif
  42         .long   0                                       // SizeOfUninitializedData
  43         .long   __efistub_efi_pe_entry - _start         // AddressOfEntryPoint
  44         .long   efi_header_end - _start                 // BaseOfCode
  45 #ifdef CONFIG_32BIT
  46         .long  __pecoff_text_end - _start               // BaseOfData
  47 #endif
  48
  49 extra_header_fields:
  50         .quad   0                                       // ImageBase
  51         .long   PECOFF_SECTION_ALIGNMENT                // SectionAlignment
  52         .long   PECOFF_FILE_ALIGNMENT                   // FileAlignment
  53         .short  0                                       // MajorOperatingSystemVersion
  54         .short  0                                       // MinorOperatingSystemVersion
  55         .short  LINUX_EFISTUB_MAJOR_VERSION             // MajorImageVersion
  56         .short  LINUX_EFISTUB_MINOR_VERSION             // MinorImageVersion
  57         .short  0                                       // MajorSubsystemVersion
  58         .short  0                                       // MinorSubsystemVersion
  59         .long   0                                       // Win32VersionValue
  60
  61         .long   _end - _start                           // SizeOfImage
  62
  63         // Everything before the kernel image is considered part of the header
  64         .long   efi_header_end - _start                 // SizeOfHeaders
  65         .long   0                                       // CheckSum
  66         .short  IMAGE_SUBSYSTEM_EFI_APPLICATION         // Subsystem
  67         .short  0                                       // DllCharacteristics
  68         .quad   0                                       // SizeOfStackReserve
  69         .quad   0                                       // SizeOfStackCommit
  70         .quad   0                                       // SizeOfHeapReserve
  71         .quad   0                                       // SizeOfHeapCommit
  72         .long   0                                       // LoaderFlags
  73         .long   (section_table - .) / 8                 // NumberOfRvaAndSizes
  74
  75         .quad   0                                       // ExportTable
  76         .quad   0                                       // ImportTable
  77         .quad   0                                       // ResourceTable
  78         .quad   0                                       // ExceptionTable
  79         .quad   0                                       // CertificationTable
  80         .quad   0                                       // BaseRelocationTable
  81
  82         // Section table
  83 section_table:
  84         .ascii  ".text\0\0\0"
  85         .long   __pecoff_text_end - efi_header_end      // VirtualSize
  86         .long   efi_header_end - _start                 // VirtualAddress
  87         .long   __pecoff_text_end - efi_header_end      // SizeOfRawData
  88         .long   efi_header_end - _start                 // PointerToRawData
  89
  90         .long   0                                       // PointerToRelocations
  91         .long   0                                       // PointerToLineNumbers
  92         .short  0                                       // NumberOfRelocations
  93         .short  0                                       // NumberOfLineNumbers
  94         .long   IMAGE_SCN_CNT_CODE | \
  95                 IMAGE_SCN_MEM_READ | \
  96                 IMAGE_SCN_MEM_EXECUTE                   // Characteristics
  97
  98         .ascii  ".data\0\0\0"
  99 #ifdef __clang__
 100         .long   __pecoff_data_virt_size                 // VirtualSize
 101 #else
 102         .long   __pecoff_data_virt_end - __pecoff_text_end      // VirtualSize
 103 #endif
 104         .long   __pecoff_text_end - _start              // VirtualAddress
 105 #ifdef __clang__
 106         .long   __pecoff_data_raw_size                  // SizeOfRawData
 107 #else
 108         .long   __pecoff_data_raw_end - __pecoff_text_end       // SizeOfRawData
 109 #endif
 110         .long   __pecoff_text_end - _start              // PointerToRawData
 111
 112         .long   0                                       // PointerToRelocations
 113         .long   0                                       // PointerToLineNumbers
 114         .short  0                                       // NumberOfRelocations
 115         .short  0                                       // NumberOfLineNumbers
 116         .long   IMAGE_SCN_CNT_INITIALIZED_DATA | \
 117                 IMAGE_SCN_MEM_READ | \
 118                 IMAGE_SCN_MEM_WRITE                     // Characteristics
 119
 120         .set    section_count, (. - section_table) / 40
 121
 122         .balign 0x1000
 123 efi_header_end:
 124         .endm