| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2013-2017 Linaro Ltd |
| * Authors: Roy Franz <roy.franz@linaro.org> |
| * Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| */ |
| |
| #include <linux/pe.h> |
| #include <linux/sizes.h> |
| |
| .macro __nop |
| AR_CLASS( mov r0, r0 ) |
| M_CLASS( nop.w ) |
| .endm |
| |
| .macro __initial_nops |
| #ifdef CONFIG_EFI_STUB |
| @ This is a two-instruction NOP, which happens to bear the |
| @ PE/COFF signature "MZ" in the first two bytes, so the kernel |
| @ is accepted as an EFI binary. Booting via the UEFI stub |
| @ will not execute those instructions, but the ARM/Linux |
| @ boot protocol does, so we need some NOPs here. |
| .inst MZ_MAGIC | (0xe225 << 16) @ eor r5, r5, 0x4d000 |
| eor r5, r5, 0x4d000 @ undo previous insn |
| #else |
| __nop |
| __nop |
| #endif |
| .endm |
| |
| .macro __EFI_HEADER |
| #ifdef CONFIG_EFI_STUB |
| .set start_offset, __efi_start - start |
| .org start + 0x3c |
| @ |
| @ The PE header can be anywhere in the file, but for |
| @ simplicity we keep it together with the MSDOS header |
| @ The offset to the PE/COFF header needs to be at offset |
| @ 0x3C in the MSDOS header. |
| @ The only 2 fields of the MSDOS header that are used are this |
| @ PE/COFF offset, and the "MZ" bytes at offset 0x0. |
| @ |
| .long pe_header - start @ Offset to the PE header. |
| |
| pe_header: |
| .long PE_MAGIC |
| |
| coff_header: |
| .short IMAGE_FILE_MACHINE_THUMB @ Machine |
| .short section_count @ NumberOfSections |
| .long 0 @ TimeDateStamp |
| .long 0 @ PointerToSymbolTable |
| .long 0 @ NumberOfSymbols |
| .short section_table - optional_header @ SizeOfOptionalHeader |
| .short IMAGE_FILE_32BIT_MACHINE | \ |
| IMAGE_FILE_DEBUG_STRIPPED | \ |
| IMAGE_FILE_EXECUTABLE_IMAGE | \ |
| IMAGE_FILE_LINE_NUMS_STRIPPED @ Characteristics |
| |
| #define __pecoff_code_size (__pecoff_data_start - __efi_start) |
| |
| optional_header: |
| .short PE_OPT_MAGIC_PE32 @ PE32 format |
| .byte 0x02 @ MajorLinkerVersion |
| .byte 0x14 @ MinorLinkerVersion |
| .long __pecoff_code_size @ SizeOfCode |
| .long __pecoff_data_size @ SizeOfInitializedData |
| .long 0 @ SizeOfUninitializedData |
| .long efi_pe_entry - start @ AddressOfEntryPoint |
| .long start_offset @ BaseOfCode |
| .long __pecoff_data_start - start @ BaseOfData |
| |
| extra_header_fields: |
| .long 0 @ ImageBase |
| .long SZ_4K @ SectionAlignment |
| .long SZ_512 @ FileAlignment |
| .short 0 @ MajorOsVersion |
| .short 0 @ MinorOsVersion |
| .short LINUX_EFISTUB_MAJOR_VERSION @ MajorImageVersion |
| .short LINUX_EFISTUB_MINOR_VERSION @ MinorImageVersion |
| .short 0 @ MajorSubsystemVersion |
| .short 0 @ MinorSubsystemVersion |
| .long 0 @ Win32VersionValue |
| |
| .long __pecoff_end - start @ SizeOfImage |
| .long start_offset @ SizeOfHeaders |
| .long 0 @ CheckSum |
| .short IMAGE_SUBSYSTEM_EFI_APPLICATION @ Subsystem |
| .short 0 @ DllCharacteristics |
| .long 0 @ SizeOfStackReserve |
| .long 0 @ SizeOfStackCommit |
| .long 0 @ SizeOfHeapReserve |
| .long 0 @ SizeOfHeapCommit |
| .long 0 @ LoaderFlags |
| .long (section_table - .) / 8 @ NumberOfRvaAndSizes |
| |
| .quad 0 @ ExportTable |
| .quad 0 @ ImportTable |
| .quad 0 @ ResourceTable |
| .quad 0 @ ExceptionTable |
| .quad 0 @ CertificationTable |
| .quad 0 @ BaseRelocationTable |
| |
| section_table: |
| .ascii ".text\0\0\0" |
| .long __pecoff_code_size @ VirtualSize |
| .long __efi_start @ VirtualAddress |
| .long __pecoff_code_size @ SizeOfRawData |
| .long __efi_start @ PointerToRawData |
| .long 0 @ PointerToRelocations |
| .long 0 @ PointerToLineNumbers |
| .short 0 @ NumberOfRelocations |
| .short 0 @ NumberOfLineNumbers |
| .long IMAGE_SCN_CNT_CODE | \ |
| IMAGE_SCN_MEM_READ | \ |
| IMAGE_SCN_MEM_EXECUTE @ Characteristics |
| |
| .ascii ".data\0\0\0" |
| .long __pecoff_data_size @ VirtualSize |
| .long __pecoff_data_start - start @ VirtualAddress |
| .long __pecoff_data_rawsize @ SizeOfRawData |
| .long __pecoff_data_start - start @ PointerToRawData |
| .long 0 @ PointerToRelocations |
| .long 0 @ PointerToLineNumbers |
| .short 0 @ NumberOfRelocations |
| .short 0 @ NumberOfLineNumbers |
| .long IMAGE_SCN_CNT_INITIALIZED_DATA | \ |
| IMAGE_SCN_MEM_READ | \ |
| IMAGE_SCN_MEM_WRITE @ Characteristics |
| |
| .set section_count, (. - section_table) / 40 |
| |
| .align 12 |
| __efi_start: |
| #endif |
| .endm |
