1/* SPDX-License-Identifier: BSD-3-Clause or GPL-2.0-or-later */
2
3/*
4 * crt0-efi-aarch64.S - PE/COFF header for AArch64 EFI applications
5 *
6 * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice and this list of conditions, without modification.
13 * 2. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU General Public License as published by the Free Software Foundation;
18 * either version 2 of the License, or (at your option) any later version.
19 */
20
21	.section	.text.head
22
23	/*
24	 * Magic "MZ" signature for PE/COFF
25	 */
26	.globl	ImageBase
27ImageBase:
28	.ascii	"MZ"
29	.skip	58				// 'MZ' + pad + offset == 64
30	.long	pe_header - ImageBase		// Offset to the PE header.
31pe_header:
32	.ascii	"PE"
33	.short 	0
34coff_header:
35	.short	0xaa64				// AArch64
36	.short	2				// nr_sections
37	.long	0 				// TimeDateStamp
38	.long	0				// PointerToSymbolTable
39	.long	1				// NumberOfSymbols
40	.short	section_table - optional_header	// SizeOfOptionalHeader
41	.short	0x206				// Characteristics.
42						// IMAGE_FILE_DEBUG_STRIPPED |
43						// IMAGE_FILE_EXECUTABLE_IMAGE |
44						// IMAGE_FILE_LINE_NUMS_STRIPPED
45optional_header:
46	.short	0x20b				// PE32+ format
47	.byte	0x02				// MajorLinkerVersion
48	.byte	0x14				// MinorLinkerVersion
49	.long	_data - _gnuefi_start			// SizeOfCode
50	.long	_data_size			// SizeOfInitializedData
51	.long	0				// SizeOfUninitializedData
52	.long	_gnuefi_start - ImageBase		// AddressOfEntryPoint
53	.long	_gnuefi_start - ImageBase		// BaseOfCode
54
55extra_header_fields:
56	.quad	0				// ImageBase
57	.long	0x1000				// SectionAlignment
58	.long	0x200				// FileAlignment
59	.short	0				// MajorOperatingSystemVersion
60	.short	0				// MinorOperatingSystemVersion
61	.short	0				// MajorImageVersion
62	.short	0				// MinorImageVersion
63	.short	0				// MajorSubsystemVersion
64	.short	0				// MinorSubsystemVersion
65	.long	0				// Win32VersionValue
66
67	.long	_edata - ImageBase		// SizeOfImage
68
69	// Everything before the kernel image is considered part of the header
70	.long	_gnuefi_start - ImageBase		// SizeOfHeaders
71	.long	0				// CheckSum
72	.short	EFI_SUBSYSTEM			// Subsystem
73	.short	0				// DllCharacteristics
74	.quad	0				// SizeOfStackReserve
75	.quad	0				// SizeOfStackCommit
76	.quad	0				// SizeOfHeapReserve
77	.quad	0				// SizeOfHeapCommit
78	.long	0				// LoaderFlags
79	.long	0x6				// NumberOfRvaAndSizes
80
81	.quad	0				// ExportTable
82	.quad	0				// ImportTable
83	.quad	0				// ResourceTable
84	.quad	0				// ExceptionTable
85	.quad	0				// CertificationTable
86	.quad	0				// BaseRelocationTable
87
88	// Section table
89section_table:
90	.ascii	".text\0\0\0"
91	.long	_data - _gnuefi_start		// VirtualSize
92	.long	_gnuefi_start - ImageBase	// VirtualAddress
93	.long	_data - _gnuefi_start		// SizeOfRawData
94	.long	_gnuefi_start - ImageBase	// PointerToRawData
95
96	.long	0		// PointerToRelocations (0 for executables)
97	.long	0		// PointerToLineNumbers (0 for executables)
98	.short	0		// NumberOfRelocations  (0 for executables)
99	.short	0		// NumberOfLineNumbers  (0 for executables)
100	.long	0x60000020	// Characteristics (section flags)
101
102	.ascii	".data\0\0\0"
103	.long	_data_size		// VirtualSize
104	.long	_data - ImageBase	// VirtualAddress
105	.long	_data_size		// SizeOfRawData
106	.long	_data - ImageBase	// PointerToRawData
107
108	.long	0		// PointerToRelocations (0 for executables)
109	.long	0		// PointerToLineNumbers (0 for executables)
110	.short	0		// NumberOfRelocations  (0 for executables)
111	.short	0		// NumberOfLineNumbers  (0 for executables)
112	.long	0xc0000040	// Characteristics (section flags)
113
114	.align		12
115_gnuefi_start:
116	stp		x29, x30, [sp, #-32]!
117	mov		x29, sp
118
119	stp		x0, x1, [sp, #16]
120	mov		x2, x0
121	mov		x3, x1
122	adr		x0, ImageBase
123	adrp		x1, _DYNAMIC
124	add		x1, x1, #:lo12:_DYNAMIC
125	bl		_relocate
126	cbnz		x0, 0f
127
128	ldp		x0, x1, [sp, #16]
129	bl		efi_main
130
1310:	ldp		x29, x30, [sp], #32
132	ret
133