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/memory.h>
16#include <asm/mpu.h>
17#include <asm/page.h>
18
19OUTPUT_ARCH(arm)
20ENTRY(stext)
21
22#ifndef __ARMEB__
23jiffies = jiffies_64;
24#else
25jiffies = jiffies_64 + 4;
26#endif
27
28SECTIONS
29{
30	/*
31	 * XXX: The linker does not define how output sections are
32	 * assigned to input sections when there are multiple statements
33	 * matching the same input section name.  There is no documented
34	 * order of matching.
35	 *
36	 * unwind exit sections must be discarded before the rest of the
37	 * unwind sections get included.
38	 */
39	/DISCARD/ : {
40		ARM_DISCARD
41#ifndef CONFIG_SMP_ON_UP
42		*(.alt.smp.init)
43#endif
44#ifndef CONFIG_ARM_UNWIND
45		*(.ARM.exidx) *(.ARM.exidx.*)
46		*(.ARM.extab) *(.ARM.extab.*)
47#endif
48	}
49
50	. = KERNEL_OFFSET + TEXT_OFFSET;
51	.head.text : {
52		_text = .;
53		HEAD_TEXT
54	}
55
56#ifdef CONFIG_STRICT_KERNEL_RWX
57	. = ALIGN(1<<SECTION_SHIFT);
58#endif
59
60#ifdef CONFIG_ARM_MPU
61	. = ALIGN(PMSAv8_MINALIGN);
62#endif
63	.text : {			/* Real text segment		*/
64		_stext = .;		/* Text and read-only data	*/
65		ARM_TEXT
66	}
67
68#ifdef CONFIG_DEBUG_ALIGN_RODATA
69	. = ALIGN(1<<SECTION_SHIFT);
70#endif
71	_etext = .;			/* End of text section */
72
73	RO_DATA(PAGE_SIZE)
74
75	. = ALIGN(4);
76	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
77		__start___ex_table = .;
78		ARM_MMU_KEEP(*(__ex_table))
79		__stop___ex_table = .;
80	}
81
82#ifdef CONFIG_ARM_UNWIND
83	ARM_UNWIND_SECTIONS
84#endif
85
86#ifdef CONFIG_STRICT_KERNEL_RWX
87	. = ALIGN(1<<SECTION_SHIFT);
88#else
89	. = ALIGN(PAGE_SIZE);
90#endif
91	__init_begin = .;
92
93	ARM_VECTORS
94	INIT_TEXT_SECTION(8)
95	.exit.text : {
96		ARM_EXIT_KEEP(EXIT_TEXT)
97	}
98	.init.proc.info : {
99		ARM_CPU_DISCARD(PROC_INFO)
100	}
101	.init.arch.info : {
102		__arch_info_begin = .;
103		*(.arch.info.init)
104		__arch_info_end = .;
105	}
106	.init.tagtable : {
107		__tagtable_begin = .;
108		*(.taglist.init)
109		__tagtable_end = .;
110	}
111#ifdef CONFIG_SMP_ON_UP
112	.init.smpalt : {
113		__smpalt_begin = .;
114		*(.alt.smp.init)
115		__smpalt_end = .;
116	}
117#endif
118	.init.pv_table : {
119		__pv_table_begin = .;
120		*(.pv_table)
121		__pv_table_end = .;
122	}
123
124	INIT_DATA_SECTION(16)
125
126	.exit.data : {
127		ARM_EXIT_KEEP(EXIT_DATA)
128	}
129
130#ifdef CONFIG_SMP
131	PERCPU_SECTION(L1_CACHE_BYTES)
132#endif
133
134#ifdef CONFIG_HAVE_TCM
135	ARM_TCM
136#endif
137
138#ifdef CONFIG_STRICT_KERNEL_RWX
139	. = ALIGN(1<<SECTION_SHIFT);
140#else
141	. = ALIGN(THREAD_ALIGN);
142#endif
143	__init_end = .;
144
145	_sdata = .;
146	RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
147	_edata = .;
148
149	BSS_SECTION(0, 0, 0)
150#ifdef CONFIG_ARM_MPU
151	. = ALIGN(PMSAv8_MINALIGN);
152#endif
153	_end = .;
154
155	STABS_DEBUG
156	DWARF_DEBUG
157	ARM_DETAILS
158
159	ARM_ASSERTS
160}
161
162#ifdef CONFIG_STRICT_KERNEL_RWX
163/*
164 * Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
165 * be the first section-aligned location after __start_rodata. Otherwise,
166 * it will be equal to __start_rodata.
167 */
168__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
169#endif
170
171/*
172 * These must never be empty
173 * If you have to comment these two assert statements out, your
174 * binutils is too old (for other reasons as well)
175 */
176ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
177#ifndef CONFIG_COMPILE_TEST
178ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
179#endif
180
181#endif /* CONFIG_XIP_KERNEL */
182