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1/* ld script to make s390 Linux kernel
2 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
3 */
4
5#include <asm/thread_info.h>
6#include <asm/page.h>
7#include <asm-generic/vmlinux.lds.h>
8
9#ifndef CONFIG_64BIT
10OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
11OUTPUT_ARCH(s390)
12ENTRY(_start)
13jiffies = jiffies_64 + 4;
14#else
15OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
16OUTPUT_ARCH(s390:64-bit)
17ENTRY(_start)
18jiffies = jiffies_64;
19#endif
20
21PHDRS {
22 text PT_LOAD FLAGS(5); /* R_E */
23 data PT_LOAD FLAGS(7); /* RWE */
24 note PT_NOTE FLAGS(0); /* ___ */
25}
26
27SECTIONS
28{
29 . = 0x00000000;
30 .text : {
31 _text = .; /* Text and read-only data */
32 HEAD_TEXT
33 TEXT_TEXT
34 SCHED_TEXT
35 LOCK_TEXT
36 KPROBES_TEXT
37 IRQENTRY_TEXT
38 *(.fixup)
39 *(.gnu.warning)
40 } :text = 0x0700
41
42 _etext = .; /* End of text section */
43
44 NOTES :text :note
45
46 RODATA
47
48#ifdef CONFIG_SHARED_KERNEL
49 . = ALIGN(0x100000); /* VM shared segments are 1MB aligned */
50#endif
51
52 . = ALIGN(PAGE_SIZE);
53 _eshared = .; /* End of shareable data */
54 _sdata = .; /* Start of data section */
55
56 EXCEPTION_TABLE(16) :data
57
58 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
59
60 _edata = .; /* End of data section */
61
62 /* will be freed after init */
63 . = ALIGN(PAGE_SIZE); /* Init code and data */
64 __init_begin = .;
65
66 INIT_TEXT_SECTION(PAGE_SIZE)
67
68 /*
69 * .exit.text is discarded at runtime, not link time,
70 * to deal with references from __bug_table
71 */
72 .exit.text : {
73 EXIT_TEXT
74 }
75
76 /* early.c uses stsi, which requires page aligned data. */
77 . = ALIGN(PAGE_SIZE);
78 INIT_DATA_SECTION(0x100)
79
80 PERCPU_SECTION(0x100)
81 . = ALIGN(PAGE_SIZE);
82 __init_end = .; /* freed after init ends here */
83
84 BSS_SECTION(0, 2, 0)
85
86 _end = . ;
87
88 /* Debugging sections. */
89 STABS_DEBUG
90 DWARF_DEBUG
91
92 /* Sections to be discarded */
93 DISCARDS
94}
1/* SPDX-License-Identifier: GPL-2.0 */
2/* ld script to make s390 Linux kernel
3 * Written by Martin Schwidefsky (schwidefsky@de.ibm.com)
4 */
5
6#include <asm/thread_info.h>
7#include <asm/page.h>
8
9/*
10 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
11 * make sure it has 16k alignment.
12 */
13#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir)
14
15/* Handle ro_after_init data on our own. */
16#define RO_AFTER_INIT_DATA
17
18#include <asm-generic/vmlinux.lds.h>
19#include <asm/vmlinux.lds.h>
20
21OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
22OUTPUT_ARCH(s390:64-bit)
23ENTRY(startup_continue)
24jiffies = jiffies_64;
25
26PHDRS {
27 text PT_LOAD FLAGS(5); /* R_E */
28 data PT_LOAD FLAGS(7); /* RWE */
29 note PT_NOTE FLAGS(0); /* ___ */
30}
31
32SECTIONS
33{
34 . = 0x100000;
35 .text : {
36 _stext = .; /* Start of text section */
37 _text = .; /* Text and read-only data */
38 HEAD_TEXT
39 TEXT_TEXT
40 SCHED_TEXT
41 CPUIDLE_TEXT
42 LOCK_TEXT
43 KPROBES_TEXT
44 IRQENTRY_TEXT
45 SOFTIRQENTRY_TEXT
46 *(.text.*_indirect_*)
47 *(.fixup)
48 *(.gnu.warning)
49 . = ALIGN(PAGE_SIZE);
50 _etext = .; /* End of text section */
51 } :text = 0x0700
52
53 NOTES :text :note
54
55 .dummy : { *(.dummy) } :data
56
57 RO_DATA_SECTION(PAGE_SIZE)
58
59 . = ALIGN(PAGE_SIZE);
60 _sdata = .; /* Start of data section */
61
62 . = ALIGN(PAGE_SIZE);
63 __start_ro_after_init = .;
64 .data..ro_after_init : {
65 *(.data..ro_after_init)
66 JUMP_TABLE_DATA
67 }
68 EXCEPTION_TABLE(16)
69 . = ALIGN(PAGE_SIZE);
70 __end_ro_after_init = .;
71
72 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
73 BOOT_DATA_PRESERVED
74
75 _edata = .; /* End of data section */
76
77 /* will be freed after init */
78 . = ALIGN(PAGE_SIZE); /* Init code and data */
79 __init_begin = .;
80
81 . = ALIGN(PAGE_SIZE);
82 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
83 _sinittext = .;
84 INIT_TEXT
85 . = ALIGN(PAGE_SIZE);
86 _einittext = .;
87 }
88
89 /*
90 * .exit.text is discarded at runtime, not link time,
91 * to deal with references from __bug_table
92 */
93 .exit.text : {
94 EXIT_TEXT
95 }
96
97 .exit.data : {
98 EXIT_DATA
99 }
100
101 /*
102 * struct alt_inst entries. From the header (alternative.h):
103 * "Alternative instructions for different CPU types or capabilities"
104 * Think locking instructions on spinlocks.
105 * Note, that it is a part of __init region.
106 */
107 . = ALIGN(8);
108 .altinstructions : {
109 __alt_instructions = .;
110 *(.altinstructions)
111 __alt_instructions_end = .;
112 }
113
114 /*
115 * And here are the replacement instructions. The linker sticks
116 * them as binary blobs. The .altinstructions has enough data to
117 * get the address and the length of them to patch the kernel safely.
118 * Note, that it is a part of __init region.
119 */
120 .altinstr_replacement : {
121 *(.altinstr_replacement)
122 }
123
124 /*
125 * Table with the patch locations to undo expolines
126 */
127 .nospec_call_table : {
128 __nospec_call_start = . ;
129 *(.s390_indirect*)
130 __nospec_call_end = . ;
131 }
132 .nospec_return_table : {
133 __nospec_return_start = . ;
134 *(.s390_return*)
135 __nospec_return_end = . ;
136 }
137
138 BOOT_DATA
139
140 /* early.c uses stsi, which requires page aligned data. */
141 . = ALIGN(PAGE_SIZE);
142 INIT_DATA_SECTION(0x100)
143
144 PERCPU_SECTION(0x100)
145
146 .dynsym ALIGN(8) : {
147 __dynsym_start = .;
148 *(.dynsym)
149 __dynsym_end = .;
150 }
151 .rela.dyn ALIGN(8) : {
152 __rela_dyn_start = .;
153 *(.rela*)
154 __rela_dyn_end = .;
155 }
156
157 . = ALIGN(PAGE_SIZE);
158 __init_end = .; /* freed after init ends here */
159
160 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
161
162 _end = . ;
163
164 /*
165 * uncompressed image info used by the decompressor
166 * it should match struct vmlinux_info
167 */
168 .vmlinux.info 0 (INFO) : {
169 QUAD(_stext) /* default_lma */
170 QUAD(startup_continue) /* entry */
171 QUAD(__bss_start - _stext) /* image_size */
172 QUAD(__bss_stop - __bss_start) /* bss_size */
173 QUAD(__boot_data_start) /* bootdata_off */
174 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
175 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
176 QUAD(__boot_data_preserved_end -
177 __boot_data_preserved_start) /* bootdata_preserved_size */
178 QUAD(__dynsym_start) /* dynsym_start */
179 QUAD(__rela_dyn_start) /* rela_dyn_start */
180 QUAD(__rela_dyn_end) /* rela_dyn_end */
181 } :NONE
182
183 /* Debugging sections. */
184 STABS_DEBUG
185 DWARF_DEBUG
186
187 /* Sections to be discarded */
188 DISCARDS
189 /DISCARD/ : {
190 *(.eh_frame)
191 }
192}