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/*
* crt0-efi-arm.S - PE/COFF header for ARM EFI applications
*
* Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
*
* SPDX-License-Identifier: GPL-2.0+ BSD-2-Clause
*
* This file is taken and modified from the gnu-efi project.
*/
.section .text.head
/*
* Magic "MZ" signature for PE/COFF
*/
.globl image_base
image_base:
.ascii "MZ"
.skip 58 /* 'MZ' + pad + offset == 64 */
.long pe_header - image_base /* Offset to the PE header */
pe_header:
.ascii "PE"
.short 0
coff_header:
.short 0x1c2 /* Mixed ARM/Thumb */
.short 2 /* nr_sections */
.long 0 /* TimeDateStamp */
.long 0 /* PointerToSymbolTable */
.long 1 /* NumberOfSymbols */
.short section_table - optional_header /* SizeOfOptionalHeader */
/*
* Characteristics: IMAGE_FILE_32BIT_MACHINE |
* IMAGE_FILE_DEBUG_STRIPPED | IMAGE_FILE_EXECUTABLE_IMAGE |
* IMAGE_FILE_LINE_NUMS_STRIPPED
*/
.short 0x306
optional_header:
.short 0x10b /* PE32+ format */
.byte 0x02 /* MajorLinkerVersion */
.byte 0x14 /* MinorLinkerVersion */
.long _edata - _start /* SizeOfCode */
.long 0 /* SizeOfInitializedData */
.long 0 /* SizeOfUninitializedData */
.long _start - image_base /* AddressOfEntryPoint */
.long _start - image_base /* BaseOfCode */
.long 0 /* BaseOfData */
extra_header_fields:
.long 0 /* image_base */
.long 0x20 /* SectionAlignment */
.long 0x8 /* FileAlignment */
.short 0 /* MajorOperatingSystemVersion */
.short 0 /* MinorOperatingSystemVersion */
.short 0 /* MajorImageVersion */
.short 0 /* MinorImageVersion */
.short 0 /* MajorSubsystemVersion */
.short 0 /* MinorSubsystemVersion */
.long 0 /* Win32VersionValue */
.long _edata - image_base /* SizeOfImage */
/*
* Everything before the kernel image is considered part of the header
*/
.long _start - image_base /* SizeOfHeaders */
.long 0 /* CheckSum */
.short EFI_SUBSYSTEM /* Subsystem */
.short 0 /* DllCharacteristics */
.long 0 /* SizeOfStackReserve */
.long 0 /* SizeOfStackCommit */
.long 0 /* SizeOfHeapReserve */
.long 0 /* SizeOfHeapCommit */
.long 0 /* LoaderFlags */
.long 0x6 /* NumberOfRvaAndSizes */
.quad 0 /* ExportTable */
.quad 0 /* ImportTable */
.quad 0 /* ResourceTable */
.quad 0 /* ExceptionTable */
.quad 0 /* CertificationTable */
.quad 0 /* BaseRelocationTable */
section_table:
/*
* The EFI application loader requires a relocation section
* because EFI applications must be relocatable. This is a
* dummy section as far as we are concerned.
*/
.ascii ".reloc"
.byte 0
.byte 0 /* end of 0 padding of section name */
.long 0
.long 0
.long 0 /* SizeOfRawData */
.long 0 /* PointerToRawData */
.long 0 /* PointerToRelocations */
.long 0 /* PointerToLineNumbers */
.short 0 /* NumberOfRelocations */
.short 0 /* NumberOfLineNumbers */
.long 0x42100040 /* Characteristics (section flags) */
.ascii ".text"
.byte 0
.byte 0
.byte 0 /* end of 0 padding of section name */
.long _edata - _start /* VirtualSize */
.long _start - image_base /* VirtualAddress */
.long _edata - _start /* SizeOfRawData */
.long _start - image_base /* PointerToRawData */
.long 0 /* PointerToRelocations (0 for executables) */
.long 0 /* PointerToLineNumbers (0 for executables) */
.short 0 /* NumberOfRelocations (0 for executables) */
.short 0 /* NumberOfLineNumbers (0 for executables) */
.long 0xe0500020 /* Characteristics (section flags) */
_start:
stmfd sp!, {r0-r2, lr}
mov r2, r0
mov r3, r1
adr r1, .L_DYNAMIC
ldr r0, [r1]
add r1, r0, r1
adr r0, image_base
bl _relocate
teq r0, #0
bne 0f
ldmfd sp, {r0-r1}
bl efi_main
0: add sp, sp, #12
ldr pc, [sp], #4
.L_DYNAMIC:
.word _DYNAMIC - .
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