1/* SPDX-License-Identifier: GPL-2.0 */
2/* ld script to make ARM Linux kernel
3 * taken from the i386 version by Russell King
4 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
5 */
6
7#ifdef CONFIG_XIP_KERNEL
8#include "vmlinux-xip.lds.S"
9#else
10
11#include <linux/pgtable.h>
12#include <asm/vmlinux.lds.h>
13#include <asm/cache.h>
14#include <asm/thread_info.h>
15#include <asm/page.h>
16#include <asm/mpu.h>
17
18OUTPUT_ARCH(arm)
19ENTRY(stext)
20
21#ifndef __ARMEB__
22jiffies = jiffies_64;
23#else
24jiffies = jiffies_64 + 4;
25#endif
26
27SECTIONS
28{
29	/*
30	 * XXX: The linker does not define how output sections are
31	 * assigned to input sections when there are multiple statements
32	 * matching the same input section name.  There is no documented
33	 * order of matching.
34	 *
35	 * unwind exit sections must be discarded before the rest of the
36	 * unwind sections get included.
37	 */
38	/DISCARD/ : {
39		ARM_DISCARD
40#ifndef CONFIG_SMP_ON_UP
41		*(.alt.smp.init)
42#endif
43#ifndef CONFIG_ARM_UNWIND
44		*(.ARM.exidx) *(.ARM.exidx.*)
45		*(.ARM.extab) *(.ARM.extab.*)
46#endif
47	}
48
49	. = KERNEL_OFFSET + TEXT_OFFSET;
50	.head.text : {
51		_text = .;
52		HEAD_TEXT
53	}
54
55#ifdef CONFIG_STRICT_KERNEL_RWX
56	. = ALIGN(1<<SECTION_SHIFT);
57#endif
58
59#ifdef CONFIG_ARM_MPU
60	. = ALIGN(PMSAv8_MINALIGN);
61#endif
62	.text : {			/* Real text segment		*/
63		_stext = .;		/* Text and read-only data	*/
64		ARM_TEXT
65	}
66
67#ifdef CONFIG_DEBUG_ALIGN_RODATA
68	. = ALIGN(1<<SECTION_SHIFT);
69#endif
70	_etext = .;			/* End of text section */
71
72	RO_DATA(PAGE_SIZE)
73
74	. = ALIGN(4);
75	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
76		__start___ex_table = .;
77		ARM_MMU_KEEP(KEEP(*(__ex_table)))
78		__stop___ex_table = .;
79	}
80
81#ifdef CONFIG_ARM_UNWIND
82	ARM_UNWIND_SECTIONS
83#endif
84
85#ifdef CONFIG_STRICT_KERNEL_RWX
86	. = ALIGN(1<<SECTION_SHIFT);
87#else
88	. = ALIGN(PAGE_SIZE);
89#endif
90	__init_begin = .;
91
92	ARM_VECTORS
93	INIT_TEXT_SECTION(8)
94	.exit.text : {
95		ARM_EXIT_KEEP(EXIT_TEXT)
96	}
97	.init.proc.info : {
98		ARM_CPU_DISCARD(PROC_INFO)
99	}
100	.init.arch.info : {
101		__arch_info_begin = .;
102		KEEP(*(.arch.info.init))
103		__arch_info_end = .;
104	}
105	.init.tagtable : {
106		__tagtable_begin = .;
107		*(.taglist.init)
108		__tagtable_end = .;
109	}
110#ifdef CONFIG_SMP_ON_UP
111	.init.smpalt : {
112		__smpalt_begin = .;
113		*(.alt.smp.init)
114		__smpalt_end = .;
115	}
116#endif
117	.init.pv_table : {
118		__pv_table_begin = .;
119		KEEP(*(.pv_table))
120		__pv_table_end = .;
121	}
122
123	INIT_DATA_SECTION(16)
124
125	.exit.data : {
126		ARM_EXIT_KEEP(EXIT_DATA)
127	}
128
129#ifdef CONFIG_SMP
130	PERCPU_SECTION(L1_CACHE_BYTES)
131#endif
132
133#ifdef CONFIG_HAVE_TCM
134	ARM_TCM
135#endif
136
137#ifdef CONFIG_STRICT_KERNEL_RWX
138	. = ALIGN(1<<SECTION_SHIFT);
139#else
140	. = ALIGN(THREAD_ALIGN);
141#endif
142	__init_end = .;
143
144	_sdata = .;
145	RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
146	_edata = .;
147
148	BSS_SECTION(0, 0, 0)
149#ifdef CONFIG_ARM_MPU
150	. = ALIGN(PMSAv8_MINALIGN);
151#endif
152	_end = .;
153
154	STABS_DEBUG
155	DWARF_DEBUG
156	ARM_DETAILS
157
158	ARM_ASSERTS
159}
160
161#ifdef CONFIG_STRICT_KERNEL_RWX
162/*
163 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
164 * be the first section-aligned location after __start_rodata. Otherwise,
165 * it will be equal to __start_rodata.
166 */
167__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
168#endif
169
170/*
171 * These must never be empty
172 * If you have to comment these two assert statements out, your
173 * binutils is too old (for other reasons as well)
174 */
175ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
176#ifndef CONFIG_COMPILE_TEST
177ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
178#endif
179
180#endif /* CONFIG_XIP_KERNEL */
181