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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#include <asm/ftrace.lds.h>
9
10/*
11 * Put .bss..swapper_pg_dir as the first thing in .bss. This will
12 * make sure it has 16k alignment.
13 */
14#define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
15 *(.bss..invalid_pg_dir)
16
17#define RO_EXCEPTION_TABLE_ALIGN 16
18
19/* Handle ro_after_init data on our own. */
20#define RO_AFTER_INIT_DATA
21
22#define RUNTIME_DISCARD_EXIT
23
24#define EMITS_PT_NOTE
25
26#include <asm-generic/vmlinux.lds.h>
27#include <asm/vmlinux.lds.h>
28
29OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
30OUTPUT_ARCH(s390:64-bit)
31ENTRY(startup_continue)
32jiffies = jiffies_64;
33
34PHDRS {
35 text PT_LOAD FLAGS(5); /* R_E */
36 data PT_LOAD FLAGS(7); /* RWE */
37 note PT_NOTE FLAGS(0); /* ___ */
38}
39
40SECTIONS
41{
42 . = TEXT_OFFSET;
43 .text : {
44 _stext = .; /* Start of text section */
45 _text = .; /* Text and read-only data */
46 HEAD_TEXT
47 TEXT_TEXT
48 SCHED_TEXT
49 LOCK_TEXT
50 KPROBES_TEXT
51 IRQENTRY_TEXT
52 SOFTIRQENTRY_TEXT
53 FTRACE_HOTPATCH_TRAMPOLINES_TEXT
54 *(.text.*_indirect_*)
55 *(.gnu.warning)
56 . = ALIGN(PAGE_SIZE);
57 _etext = .; /* End of text section */
58 } :text = 0x0700
59
60 RO_DATA(PAGE_SIZE)
61
62 . = ALIGN(PAGE_SIZE);
63 _sdata = .; /* Start of data section */
64
65 . = ALIGN(PAGE_SIZE);
66 __start_ro_after_init = .;
67 .data..ro_after_init : {
68 *(.data..ro_after_init)
69 JUMP_TABLE_DATA
70 } :data
71 . = ALIGN(PAGE_SIZE);
72 __end_ro_after_init = .;
73
74 .data.rel.ro : {
75 *(.data.rel.ro .data.rel.ro.*)
76 }
77 .got : {
78 __got_start = .;
79 *(.got)
80 __got_end = .;
81 }
82
83 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
84 .data.rel : {
85 *(.data.rel*)
86 }
87 BOOT_DATA_PRESERVED
88
89 . = ALIGN(8);
90 .amode31.refs : {
91 _start_amode31_refs = .;
92 *(.amode31.refs)
93 _end_amode31_refs = .;
94 }
95
96 . = ALIGN(PAGE_SIZE);
97 _edata = .; /* End of data section */
98
99 /* will be freed after init */
100 . = ALIGN(PAGE_SIZE); /* Init code and data */
101 __init_begin = .;
102
103 . = ALIGN(PAGE_SIZE);
104 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
105 _sinittext = .;
106 INIT_TEXT
107 . = ALIGN(PAGE_SIZE);
108 _einittext = .;
109 }
110
111 /*
112 * .exit.text is discarded at runtime, not link time,
113 * to deal with references from __bug_table
114 */
115 .exit.text : {
116 EXIT_TEXT
117 }
118
119 .exit.data : {
120 EXIT_DATA
121 }
122
123 /*
124 * struct alt_inst entries. From the header (alternative.h):
125 * "Alternative instructions for different CPU types or capabilities"
126 * Think locking instructions on spinlocks.
127 * Note, that it is a part of __init region.
128 */
129 . = ALIGN(8);
130 .altinstructions : {
131 __alt_instructions = .;
132 *(.altinstructions)
133 __alt_instructions_end = .;
134 }
135
136 /*
137 * And here are the replacement instructions. The linker sticks
138 * them as binary blobs. The .altinstructions has enough data to
139 * get the address and the length of them to patch the kernel safely.
140 * Note, that it is a part of __init region.
141 */
142 .altinstr_replacement : {
143 *(.altinstr_replacement)
144 }
145
146 /*
147 * Table with the patch locations to undo expolines
148 */
149 . = ALIGN(4);
150 .nospec_call_table : {
151 __nospec_call_start = . ;
152 *(.s390_indirect*)
153 __nospec_call_end = . ;
154 }
155 .nospec_return_table : {
156 __nospec_return_start = . ;
157 *(.s390_return*)
158 __nospec_return_end = . ;
159 }
160
161 BOOT_DATA
162
163 /*
164 * .amode31 section for code, data, ex_table that need to stay
165 * below 2 GB, even when the kernel is relocated above 2 GB.
166 */
167 . = ALIGN(PAGE_SIZE);
168 _samode31 = .;
169 .amode31.text : {
170 _stext_amode31 = .;
171 *(.amode31.text)
172 *(.amode31.text.*_indirect_*)
173 . = ALIGN(PAGE_SIZE);
174 _etext_amode31 = .;
175 }
176 . = ALIGN(16);
177 .amode31.ex_table : {
178 _start_amode31_ex_table = .;
179 KEEP(*(.amode31.ex_table))
180 _stop_amode31_ex_table = .;
181 }
182 . = ALIGN(PAGE_SIZE);
183 .amode31.data : {
184 *(.amode31.data)
185 }
186 . = _samode31 + AMODE31_SIZE;
187 _eamode31 = .;
188
189 /* early.c uses stsi, which requires page aligned data. */
190 . = ALIGN(PAGE_SIZE);
191 INIT_DATA_SECTION(0x100)
192
193 RUNTIME_CONST_VARIABLES
194
195 PERCPU_SECTION(0x100)
196
197 . = ALIGN(PAGE_SIZE);
198 __init_end = .; /* freed after init ends here */
199
200 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
201
202 . = ALIGN(PAGE_SIZE);
203 _end = . ;
204
205 /*
206 * uncompressed image info used by the decompressor
207 * it should match struct vmlinux_info
208 */
209 .vmlinux.info 0 (INFO) : {
210 QUAD(startup_continue) /* entry */
211 QUAD(__bss_start - _stext) /* image_size */
212 QUAD(__bss_stop - __bss_start) /* bss_size */
213 QUAD(__boot_data_start) /* bootdata_off */
214 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
215 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
216 QUAD(__boot_data_preserved_end -
217 __boot_data_preserved_start) /* bootdata_preserved_size */
218 QUAD(__got_start) /* got_start */
219 QUAD(__got_end) /* got_end */
220 QUAD(_eamode31 - _samode31) /* amode31_size */
221 QUAD(init_mm)
222 QUAD(swapper_pg_dir)
223 QUAD(invalid_pg_dir)
224 QUAD(__alt_instructions)
225 QUAD(__alt_instructions_end)
226#ifdef CONFIG_KASAN
227 QUAD(kasan_early_shadow_page)
228 QUAD(kasan_early_shadow_pte)
229 QUAD(kasan_early_shadow_pmd)
230 QUAD(kasan_early_shadow_pud)
231 QUAD(kasan_early_shadow_p4d)
232#endif
233 } :NONE
234
235 /* Debugging sections. */
236 STABS_DEBUG
237 DWARF_DEBUG
238 ELF_DETAILS
239
240 /*
241 * Make sure that the .got.plt is either completely empty or it
242 * contains only the three reserved double words.
243 */
244 .got.plt : {
245 *(.got.plt)
246 }
247 ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18, "Unexpected GOT/PLT entries detected!")
248
249 /*
250 * Sections that should stay zero sized, which is safer to
251 * explicitly check instead of blindly discarding.
252 */
253 .plt : {
254 *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
255 }
256 ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
257 .rela.dyn : {
258 *(.rela.*) *(.rela_*)
259 }
260 ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
261
262 /* Sections to be discarded */
263 DISCARDS
264 /DISCARD/ : {
265 *(.eh_frame)
266 *(.interp)
267 }
268}