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https://xff.cz/git/u-boot/
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dd46eef2f6
Add support for EFI apps on ARM. This includes start-up and relocation code, plus a link script and some compiler setting changes. Signed-off-by: Simon Glass <sjg@chromium.org> [agraf: Remove whitespace change, add kconfig dep] Signed-off-by: Alexander Graf <agraf@suse.de>
139 lines
3.7 KiB
ArmAsm
139 lines
3.7 KiB
ArmAsm
/*
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* crt0-efi-arm.S - PE/COFF header for ARM 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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* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause
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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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.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 image_base
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image_base:
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.ascii "MZ"
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.skip 58 /* 'MZ' + pad + offset == 64 */
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.long pe_header - image_base /* Offset to the PE header */
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pe_header:
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.ascii "PE"
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.short 0
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coff_header:
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.short 0x1c2 /* Mixed ARM/Thumb */
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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 1 /* NumberOfSymbols */
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.short section_table - optional_header /* SizeOfOptionalHeader */
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/*
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* Characteristics: IMAGE_FILE_32BIT_MACHINE |
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* IMAGE_FILE_DEBUG_STRIPPED | IMAGE_FILE_EXECUTABLE_IMAGE |
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* IMAGE_FILE_LINE_NUMS_STRIPPED
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*/
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.short 0x306
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optional_header:
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.short 0x10b /* 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 - image_base /* AddressOfEntryPoint */
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.long _start - image_base /* BaseOfCode */
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.long 0 /* BaseOfData */
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extra_header_fields:
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.long 0 /* image_base */
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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 - image_base /* 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 - image_base /* SizeOfHeaders */
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.long 0 /* CheckSum */
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.short EFI_SUBSYSTEM /* Subsystem */
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.short 0 /* DllCharacteristics */
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.long 0 /* SizeOfStackReserve */
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.long 0 /* SizeOfStackCommit */
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.long 0 /* SizeOfHeapReserve */
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.long 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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/*
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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 - image_base /* VirtualAddress */
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.long _edata - _start /* SizeOfRawData */
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.long _start - image_base /* 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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stmfd sp!, {r0-r2, lr}
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mov r2, r0
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mov r3, r1
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adr r1, .L_DYNAMIC
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ldr r0, [r1]
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add r1, r0, r1
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adr r0, image_base
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bl _relocate
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teq r0, #0
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bne 0f
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ldmfd sp, {r0-r1}
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bl efi_main
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0: add sp, sp, #12
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ldr pc, [sp], #4
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.L_DYNAMIC:
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.word _DYNAMIC - .
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