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The fields SizeOfCode, SizeOfInitializedData, and SizeOfUninitializedData are define in the PE-COFF specification [1]. * SizeOfCode must match the size of all .text sections. * SizeOfInitializedData must match the size of all .data sections. * SizeOfUninitializedData must match the size of all .bss sections. We only have one .text and one .data section. SizeOfCode and SizeOfInitializedData have to be calculated as the difference between the end and the start of the respective section. As we don't have any .bss sections in the generated EFI binaries. SizeOfUninitializedData must remain 0. [1] https://learn.microsoft.com/en-us/windows/win32/debug/pe-format Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
162 lines
4.6 KiB
ArmAsm
162 lines
4.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */
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/*
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* crt0-efi-aarch64.S - PE/COFF header for aarch64 EFI applications
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*
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* Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
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*
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*
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* This file is taken and modified from the gnu-efi project.
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*/
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#include <asm-generic/pe.h>
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.section .text.head
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/*
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* Magic "MZ" signature for PE/COFF
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*/
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.globl ImageBase
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ImageBase:
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.short IMAGE_DOS_SIGNATURE /* 'MZ' */
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.skip 54 /* 'MZ' + pad + offset == 64 */
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.long LINUX_ARM64_MAGIC /* For GRUB's linux command */
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.long pe_header - ImageBase /* Offset to the PE header */
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pe_header:
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.long IMAGE_NT_SIGNATURE /* 'PE' */
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coff_header:
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.short IMAGE_FILE_MACHINE_ARM64 /* AArch64 */
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.short 3 /* nr_sections */
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.long 0 /* TimeDateStamp */
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.long 0 /* PointerToSymbolTable */
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.long 0 /* NumberOfSymbols */
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.short section_table - optional_header /* SizeOfOptionalHeader */
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/* Characteristics */
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.short (IMAGE_FILE_EXECUTABLE_IMAGE | \
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IMAGE_FILE_LINE_NUMS_STRIPPED | \
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IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
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IMAGE_FILE_LARGE_ADDRESS_AWARE | \
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IMAGE_FILE_DEBUG_STRIPPED)
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optional_header:
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.short IMAGE_NT_OPTIONAL_HDR64_MAGIC /* PE32+ format */
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.byte 0x02 /* MajorLinkerVersion */
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.byte 0x14 /* MinorLinkerVersion */
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.long _etext - _start /* SizeOfCode */
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.long _data_size /* SizeOfInitializedData */
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.long 0 /* SizeOfUninitializedData */
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.long _start - ImageBase /* AddressOfEntryPoint */
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.long _start - ImageBase /* BaseOfCode */
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extra_header_fields:
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.quad 0 /* ImageBase */
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.long 0x1000 /* SectionAlignment */
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.long 0x200 /* FileAlignment */
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.short 0 /* MajorOperatingSystemVersion */
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.short 0 /* MinorOperatingSystemVersion */
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.short 0 /* MajorImageVersion */
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.short 0 /* MinorImageVersion */
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.short 0 /* MajorSubsystemVersion */
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.short 0 /* MinorSubsystemVersion */
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.long 0 /* Win32VersionValue */
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.long _edata - ImageBase /* SizeOfImage */
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/*
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* Everything before the kernel image is considered part of the header
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*/
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.long _start - ImageBase /* SizeOfHeaders */
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.long 0 /* CheckSum */
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.short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
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#if CONFIG_VENDOR_EFI
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.short 0 /* DllCharacteristics */
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#else
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.short IMAGE_DLLCHARACTERISTICS_NX_COMPAT
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#endif
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.quad 0 /* SizeOfStackReserve */
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.quad 0 /* SizeOfStackCommit */
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.quad 0 /* SizeOfHeapReserve */
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.quad 0 /* SizeOfHeapCommit */
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.long 0 /* LoaderFlags */
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.long 0x6 /* NumberOfRvaAndSizes */
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.quad 0 /* ExportTable */
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.quad 0 /* ImportTable */
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.quad 0 /* ResourceTable */
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.quad 0 /* ExceptionTable */
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.quad 0 /* CertificationTable */
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.quad 0 /* BaseRelocationTable */
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/* Section table */
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section_table:
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/*
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* The EFI application loader requires a relocation section
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* because EFI applications must be relocatable. This is a
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* dummy section as far as we are concerned.
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*/
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.ascii ".reloc"
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.byte 0
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.byte 0 /* end of 0 padding of section name */
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.long 0
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.long 0
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.long 0 /* SizeOfRawData */
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.long 0 /* PointerToRawData */
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.long 0 /* PointerToRelocations */
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.long 0 /* PointerToLineNumbers */
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.short 0 /* NumberOfRelocations */
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.short 0 /* NumberOfLineNumbers */
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/* Characteristics (section flags) */
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.long (IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_MEM_DISCARDABLE | \
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IMAGE_SCN_CNT_INITIALIZED_DATA)
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.ascii ".text"
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.byte 0
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.byte 0
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.byte 0 /* end of 0 padding of section name */
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.long _etext - _start /* VirtualSize */
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.long _start - ImageBase /* VirtualAddress */
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.long _etext - _start /* SizeOfRawData */
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.long _start - ImageBase /* PointerToRawData */
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.long 0 /* PointerToRelocations */
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.long 0 /* PointerToLineNumbers */
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.short 0 /* NumberOfRelocations */
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.short 0 /* NumberOfLineNumbers */
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/* Characteristics (section flags) */
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.long (IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_MEM_EXECUTE | \
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IMAGE_SCN_CNT_CODE)
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.ascii ".data"
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.byte 0
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.byte 0
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.byte 0 /* end of 0 padding of section name */
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.long _data_size /* VirtualSize */
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.long _data - ImageBase /* VirtualAddress */
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.long _data_size /* SizeOfRawData */
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.long _data - ImageBase /* PointerToRawData */
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.long 0 /* PointerToRelocations */
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.long 0 /* PointerToLineNumbers */
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.short 0 /* NumberOfRelocations */
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.short 0 /* NumberOfLineNumbers */
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/* Characteristics (section flags) */
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.long (IMAGE_SCN_MEM_WRITE | \
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IMAGE_SCN_MEM_READ | \
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IMAGE_SCN_CNT_INITIALIZED_DATA)
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.align 12
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_start:
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stp x29, x30, [sp, #-32]!
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mov x29, sp
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stp x0, x1, [sp, #16]
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adr x0, ImageBase
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adrp x1, _DYNAMIC
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add x1, x1, #:lo12:_DYNAMIC
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bl _relocate
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cbnz x0, 0f
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ldp x0, x1, [sp, #16]
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bl efi_main
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0: ldp x29, x30, [sp], #32
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ret
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