aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm64/kernel/vmlinux.lds.S
blob: 9965ec87cbecfcac284eddc4459bda6adab0c368 (plain) (blame)
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
/*
 * ld script to make ARM Linux kernel
 * taken from the i386 version by Russell King
 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
 */

#include <asm-generic/vmlinux.lds.h>
#include <asm/thread_info.h>
#include <asm/memory.h>
#include <asm/page.h>

#include "image.h"

/* .exit.text needed in case of alternative patching */
#define ARM_EXIT_KEEP(x)	x
#define ARM_EXIT_DISCARD(x)

OUTPUT_ARCH(aarch64)
ENTRY(_text)

jiffies = jiffies_64;

#define HYPERVISOR_TEXT					\
	/*						\
	 * Force the alignment to be compatible with	\
	 * the vectors requirements			\
	 */						\
	. = ALIGN(2048);				\
	VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;	\
	*(.hyp.idmap.text)				\
	VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;	\
	VMLINUX_SYMBOL(__hyp_text_start) = .;		\
	*(.hyp.text)					\
	VMLINUX_SYMBOL(__hyp_text_end) = .;

/*
 * The size of the PE/COFF section that covers the kernel image, which
 * runs from stext to _edata, must be a round multiple of the PE/COFF
 * FileAlignment, which we set to its minimum value of 0x200. 'stext'
 * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned
 * boundary should be sufficient.
 */
PECOFF_FILE_ALIGNMENT = 0x200;

#ifdef CONFIG_EFI
#define PECOFF_EDATA_PADDING	\
	.pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); }
#else
#define PECOFF_EDATA_PADDING
#endif

SECTIONS
{
	/*
	 * XXX: The linker does not define how output sections are
	 * assigned to input sections when there are multiple statements
	 * matching the same input section name.  There is no documented
	 * order of matching.
	 */
	/DISCARD/ : {
		ARM_EXIT_DISCARD(EXIT_TEXT)
		ARM_EXIT_DISCARD(EXIT_DATA)
		EXIT_CALL
		*(.discard)
		*(.discard.*)
	}

	. = PAGE_OFFSET + TEXT_OFFSET;

	.head.text : {
		_text = .;
		HEAD_TEXT
	}
	.text : {			/* Real text segment		*/
		_stext = .;		/* Text and read-only data	*/
			__exception_text_start = .;
			*(.exception.text)
			__exception_text_end = .;
			IRQENTRY_TEXT
			TEXT_TEXT
			SCHED_TEXT
			LOCK_TEXT
			HYPERVISOR_TEXT
			*(.fixup)
			*(.gnu.warning)
		. = ALIGN(16);
		*(.got)			/* Global offset table		*/
	}

	RO_DATA(PAGE_SIZE)
	EXCEPTION_TABLE(8)
	NOTES
	_etext = .;			/* End of text and rodata section */

	. = ALIGN(PAGE_SIZE);
	__init_begin = .;

	INIT_TEXT_SECTION(8)
	.exit.text : {
		ARM_EXIT_KEEP(EXIT_TEXT)
	}
	. = ALIGN(16);
	.init.data : {
		INIT_DATA
		INIT_SETUP(16)
		INIT_CALLS
		CON_INITCALL
		SECURITY_INITCALL
		INIT_RAM_FS
	}
	.exit.data : {
		ARM_EXIT_KEEP(EXIT_DATA)
	}

	PERCPU_SECTION(64)

	. = ALIGN(PAGE_SIZE);
	__init_end = .;

	. = ALIGN(4);
	.altinstructions : {
		__alt_instructions = .;
		*(.altinstructions)
		__alt_instructions_end = .;
	}
	.altinstr_replacement : {
		*(.altinstr_replacement)
	}

	. = ALIGN(PAGE_SIZE);
	_data = .;
	_sdata = .;
	RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE)
	PECOFF_EDATA_PADDING
	_edata = .;

	BSS_SECTION(0, 0, 0)

	. = ALIGN(PAGE_SIZE);
	idmap_pg_dir = .;
	. += IDMAP_DIR_SIZE;
	swapper_pg_dir = .;
	. += SWAPPER_DIR_SIZE;

	_end = .;

	STABS_DEBUG

	HEAD_SYMBOLS
}

/*
 * The HYP init code can't be more than a page long.
 */
ASSERT(((__hyp_idmap_text_start + PAGE_SIZE) > __hyp_idmap_text_end),
       "HYP init code too big")

/*
 * If padding is applied before .head.text, virt<->phys conversions will fail.
 */
ASSERT(_text == (PAGE_OFFSET + TEXT_OFFSET), "HEAD is misaligned")