Linux kernel mirror (for testing)
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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 . = PAGE_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_SIZE);
142#endif
143 __init_end = .;
144
145 _sdata = .;
146 RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
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")
177ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
178
179#endif /* CONFIG_XIP_KERNEL */