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(*(__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

source code of linux/arch/arm/kernel/vmlinux.lds.S