mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
18dd984c56
Add the Linux magic to the EFI file header to allow running our test programs with GRUB's linux command. Now we can dump the fixed-up device tree with our dtbdump.efi tool. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
136 lines
3.9 KiB
ArmAsm
136 lines
3.9 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 2 /* 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_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 _edata - _start /* SizeOfCode */
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.long 0 /* 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 0x20 /* SectionAlignment */
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.long 0x8 /* 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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.short 0 /* DllCharacteristics */
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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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.long 0x42100040 /* Characteristics (section flags) */
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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 _edata - _start /* VirtualSize */
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.long _start - ImageBase /* VirtualAddress */
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.long _edata - _start /* SizeOfRawData */
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.long _start - ImageBase /* PointerToRawData */
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.long 0 /* PointerToRelocations (0 for executables) */
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.long 0 /* PointerToLineNumbers (0 for executables) */
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.short 0 /* NumberOfRelocations (0 for executables) */
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.short 0 /* NumberOfLineNumbers (0 for executables) */
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.long 0xe0500020 /* Characteristics (section flags) */
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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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