1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*-
* Copyright (c) 2014 Andrew Turner
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* We need to be a PE32+ file for EFI. On some architectures we can use
* objcopy to create the correct file, however on arm64 we need to do
* it ourselves.
*/
#define IMAGE_FILE_MACHINE_ARM64 0xaa64
#define IMAGE_SCN_CNT_CODE 0x00000020
#define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
#define IMAGE_SCN_MEM_DISCARDABLE 0x02000000
#define IMAGE_SCN_MEM_EXECUTE 0x20000000
#define IMAGE_SCN_MEM_READ 0x40000000
.section .peheader,"a"
efi_start:
/* The MS-DOS Stub, only used to get the offset of the COFF header */
.ascii "MZ"
.short 0
.space 0x38
.long pe_sig - efi_start
/* The PE32 Signature. Needs to be 8-byte aligned */
.align 3
pe_sig:
.ascii "PE"
.short 0
coff_head:
.short IMAGE_FILE_MACHINE_ARM64 /* AArch64 file */
.short 2 /* 2 Sections */
.long 0 /* Timestamp */
.long 0 /* No symbol table */
.long 0 /* No symbols */
.short section_table - optional_header /* Optional header size */
.short 0 /* Characteristics TODO: Fill in */
optional_header:
.short 0x020b /* PE32+ (64-bit addressing) */
.byte 0 /* Major linker version */
.byte 0 /* Minor linker version */
.long _edata - _end_header /* Code size */
.long 0 /* No initialized data */
.long 0 /* No uninitialized data */
.long _start - efi_start /* Entry point */
.long _end_header - efi_start /* Start of code */
optional_windows_header:
.quad 0 /* Image base */
.long 32 /* Section Alignment */
.long 8 /* File alignment */
.short 0 /* Major OS version */
.short 0 /* Minor OS version */
.short 0 /* Major image version */
.short 0 /* Minor image version */
.short 0 /* Major subsystem version */
.short 0 /* Minor subsystem version */
.long 0 /* Win32 version */
.long _edata - efi_start /* Image size */
.long _end_header - efi_start /* Header size */
.long 0 /* Checksum */
.short 0xa /* Subsystem (EFI app) */
.short 0 /* DLL Characteristics */
.quad 0 /* Stack reserve */
.quad 0 /* Stack commit */
.quad 0 /* Heap reserve */
.quad 0 /* Heap commit */
.long 0 /* Loader flags */
.long 6 /* Number of RVAs */
/* RVAs: */
.quad 0
.quad 0
.quad 0
.quad 0
.quad 0
.quad 0
section_table:
/* We need a .reloc section for EFI */
.ascii ".reloc"
.byte 0
.byte 0 /* Pad to 8 bytes */
.long 0 /* Virtual size */
.long 0 /* Virtual address */
.long 0 /* Size of raw data */
.long 0 /* Pointer to raw data */
.long 0 /* Pointer to relocations */
.long 0 /* Pointer to line numbers */
.short 0 /* Number of relocations */
.short 0 /* Number of line numbers */
.long (IMAGE_SCN_CNT_INITIALIZED_DATA | IMAGE_SCN_MEM_READ | \
IMAGE_SCN_MEM_DISCARDABLE) /* Characteristics */
/* The contents of the loader */
.ascii ".text"
.byte 0
.byte 0
.byte 0 /* Pad to 8 bytes */
.long _edata - _end_header /* Virtual size */
.long _end_header - efi_start /* Virtual address */
.long _edata - _end_header /* Size of raw data */
.long _end_header - efi_start /* Pointer to raw data */
.long 0 /* Pointer to relocations */
.long 0 /* Pointer to line numbers */
.short 0 /* Number of relocations */
.short 0 /* Number of line numbers */
.long (IMAGE_SCN_CNT_CODE | IMAGE_SCN_MEM_EXECUTE | \
IMAGE_SCN_MEM_READ) /* Characteristics */
_end_header:
.text
.globl _start
_start:
/* Save the boot params to the stack */
stp x0, x1, [sp, #-16]!
adrp x0, __bss_start
add x0, x0, :lo12:__bss_start
adrp x1, __bss_end
add x1, x1, :lo12:__bss_end
b 2f
1:
stp xzr, xzr, [x0], #16
2:
cmp x0, x1
b.lo 1b
adrp x0, ImageBase
add x0, x0, :lo12:ImageBase
adrp x1, _DYNAMIC
add x1, x1, :lo12:_DYNAMIC
bl self_reloc
ldp x0, x1, [sp], #16
#ifndef EFI_BOOT1
/*
* Load the stack to use. The default stack may be too small for
* the lua loader.
*/
adrp x2, initstack_end
add x2, x2, :lo12:initstack_end
mov sp, x2
#endif
bl efi_main
1: b 1b
#ifndef EFI_BOOT1
.bss
.align 4
initstack:
.space (64 * 1024)
initstack_end:
#endif
|
