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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 . = 0x100000;
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 *(.fixup)
56 *(.gnu.warning)
57 . = ALIGN(PAGE_SIZE);
58 _etext = .; /* End of text section */
59 } :text = 0x0700
60
61 RO_DATA(PAGE_SIZE)
62
63 . = ALIGN(PAGE_SIZE);
64 _sdata = .; /* Start of data section */
65
66 . = ALIGN(PAGE_SIZE);
67 __start_ro_after_init = .;
68 .data..ro_after_init : {
69 *(.data..ro_after_init)
70 JUMP_TABLE_DATA
71 } :data
72 . = ALIGN(PAGE_SIZE);
73 __end_ro_after_init = .;
74
75 RW_DATA(0x100, PAGE_SIZE, THREAD_SIZE)
76 BOOT_DATA_PRESERVED
77
78 . = ALIGN(8);
79 .amode31.refs : {
80 _start_amode31_refs = .;
81 *(.amode31.refs)
82 _end_amode31_refs = .;
83 }
84
85 . = ALIGN(PAGE_SIZE);
86 _edata = .; /* End of data section */
87
88 /* will be freed after init */
89 . = ALIGN(PAGE_SIZE); /* Init code and data */
90 __init_begin = .;
91
92 . = ALIGN(PAGE_SIZE);
93 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
94 _sinittext = .;
95 INIT_TEXT
96 . = ALIGN(PAGE_SIZE);
97 _einittext = .;
98 }
99
100 /*
101 * .exit.text is discarded at runtime, not link time,
102 * to deal with references from __bug_table
103 */
104 .exit.text : {
105 EXIT_TEXT
106 }
107
108 .exit.data : {
109 EXIT_DATA
110 }
111
112 /*
113 * struct alt_inst entries. From the header (alternative.h):
114 * "Alternative instructions for different CPU types or capabilities"
115 * Think locking instructions on spinlocks.
116 * Note, that it is a part of __init region.
117 */
118 . = ALIGN(8);
119 .altinstructions : {
120 __alt_instructions = .;
121 *(.altinstructions)
122 __alt_instructions_end = .;
123 }
124
125 /*
126 * And here are the replacement instructions. The linker sticks
127 * them as binary blobs. The .altinstructions has enough data to
128 * get the address and the length of them to patch the kernel safely.
129 * Note, that it is a part of __init region.
130 */
131 .altinstr_replacement : {
132 *(.altinstr_replacement)
133 }
134
135 /*
136 * Table with the patch locations to undo expolines
137 */
138 . = ALIGN(4);
139 .nospec_call_table : {
140 __nospec_call_start = . ;
141 *(.s390_indirect*)
142 __nospec_call_end = . ;
143 }
144 .nospec_return_table : {
145 __nospec_return_start = . ;
146 *(.s390_return*)
147 __nospec_return_end = . ;
148 }
149
150 BOOT_DATA
151
152 /*
153 * .amode31 section for code, data, ex_table that need to stay
154 * below 2 GB, even when the kernel is relocated above 2 GB.
155 */
156 . = ALIGN(PAGE_SIZE);
157 _samode31 = .;
158 .amode31.text : {
159 _stext_amode31 = .;
160 *(.amode31.text)
161 *(.amode31.text.*_indirect_*)
162 . = ALIGN(PAGE_SIZE);
163 _etext_amode31 = .;
164 }
165 . = ALIGN(16);
166 .amode31.ex_table : {
167 _start_amode31_ex_table = .;
168 KEEP(*(.amode31.ex_table))
169 _stop_amode31_ex_table = .;
170 }
171 . = ALIGN(PAGE_SIZE);
172 .amode31.data : {
173 *(.amode31.data)
174 }
175 . = ALIGN(PAGE_SIZE);
176 _eamode31 = .;
177
178 /* early.c uses stsi, which requires page aligned data. */
179 . = ALIGN(PAGE_SIZE);
180 INIT_DATA_SECTION(0x100)
181
182 PERCPU_SECTION(0x100)
183
184 .dynsym ALIGN(8) : {
185 __dynsym_start = .;
186 *(.dynsym)
187 __dynsym_end = .;
188 }
189 .rela.dyn ALIGN(8) : {
190 __rela_dyn_start = .;
191 *(.rela*)
192 __rela_dyn_end = .;
193 }
194
195 . = ALIGN(PAGE_SIZE);
196 __init_end = .; /* freed after init ends here */
197
198 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
199
200 . = ALIGN(PAGE_SIZE);
201 _end = . ;
202
203 /*
204 * uncompressed image info used by the decompressor
205 * it should match struct vmlinux_info
206 */
207 .vmlinux.info 0 (INFO) : {
208 QUAD(_stext) /* default_lma */
209 QUAD(startup_continue) /* entry */
210 QUAD(__bss_start - _stext) /* image_size */
211 QUAD(__bss_stop - __bss_start) /* bss_size */
212 QUAD(__boot_data_start) /* bootdata_off */
213 QUAD(__boot_data_end - __boot_data_start) /* bootdata_size */
214 QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */
215 QUAD(__boot_data_preserved_end -
216 __boot_data_preserved_start) /* bootdata_preserved_size */
217 QUAD(__dynsym_start) /* dynsym_start */
218 QUAD(__rela_dyn_start) /* rela_dyn_start */
219 QUAD(__rela_dyn_end) /* rela_dyn_end */
220 QUAD(_eamode31 - _samode31) /* amode31_size */
221 QUAD(init_mm)
222 QUAD(swapper_pg_dir)
223 QUAD(invalid_pg_dir)
224#ifdef CONFIG_KASAN
225 QUAD(kasan_early_shadow_page)
226 QUAD(kasan_early_shadow_pte)
227 QUAD(kasan_early_shadow_pmd)
228 QUAD(kasan_early_shadow_pud)
229 QUAD(kasan_early_shadow_p4d)
230#endif
231 } :NONE
232
233 /* Debugging sections. */
234 STABS_DEBUG
235 DWARF_DEBUG
236 ELF_DETAILS
237
238 /* Sections to be discarded */
239 DISCARDS
240 /DISCARD/ : {
241 *(.eh_frame)
242 *(.interp)
243 }
244}
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
20OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
21OUTPUT_ARCH(s390:64-bit)
22ENTRY(startup)
23jiffies = jiffies_64;
24
25PHDRS {
26 text PT_LOAD FLAGS(5); /* R_E */
27 data PT_LOAD FLAGS(7); /* RWE */
28 note PT_NOTE FLAGS(0); /* ___ */
29}
30
31SECTIONS
32{
33 . = 0x00000000;
34 .text : {
35 /* Text and read-only data */
36 HEAD_TEXT
37 /*
38 * E.g. perf doesn't like symbols starting at address zero,
39 * therefore skip the initial PSW and channel program located
40 * at address zero and let _text start at 0x200.
41 */
42 _text = 0x200;
43 TEXT_TEXT
44 SCHED_TEXT
45 CPUIDLE_TEXT
46 LOCK_TEXT
47 KPROBES_TEXT
48 IRQENTRY_TEXT
49 SOFTIRQENTRY_TEXT
50 *(.fixup)
51 *(.gnu.warning)
52 } :text = 0x0700
53
54 . = ALIGN(PAGE_SIZE);
55 _etext = .; /* End of text section */
56
57 NOTES :text :note
58
59 .dummy : { *(.dummy) } :data
60
61 RO_DATA_SECTION(PAGE_SIZE)
62
63 . = ALIGN(PAGE_SIZE);
64 _sdata = .; /* Start of data section */
65
66 . = ALIGN(PAGE_SIZE);
67 __start_ro_after_init = .;
68 .data..ro_after_init : {
69 *(.data..ro_after_init)
70 }
71 EXCEPTION_TABLE(16)
72 . = ALIGN(PAGE_SIZE);
73 __end_ro_after_init = .;
74
75 RW_DATA_SECTION(0x100, PAGE_SIZE, THREAD_SIZE)
76
77 _edata = .; /* End of data section */
78
79 /* will be freed after init */
80 . = ALIGN(PAGE_SIZE); /* Init code and data */
81 __init_begin = .;
82
83 . = ALIGN(PAGE_SIZE);
84 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
85 VMLINUX_SYMBOL(_sinittext) = . ;
86 INIT_TEXT
87 . = ALIGN(PAGE_SIZE);
88 VMLINUX_SYMBOL(_einittext) = . ;
89 }
90
91 /*
92 * .exit.text is discarded at runtime, not link time,
93 * to deal with references from __bug_table
94 */
95 .exit.text : {
96 EXIT_TEXT
97 }
98
99 .exit.data : {
100 EXIT_DATA
101 }
102
103 /*
104 * struct alt_inst entries. From the header (alternative.h):
105 * "Alternative instructions for different CPU types or capabilities"
106 * Think locking instructions on spinlocks.
107 * Note, that it is a part of __init region.
108 */
109 . = ALIGN(8);
110 .altinstructions : {
111 __alt_instructions = .;
112 *(.altinstructions)
113 __alt_instructions_end = .;
114 }
115
116 /*
117 * And here are the replacement instructions. The linker sticks
118 * them as binary blobs. The .altinstructions has enough data to
119 * get the address and the length of them to patch the kernel safely.
120 * Note, that it is a part of __init region.
121 */
122 .altinstr_replacement : {
123 *(.altinstr_replacement)
124 }
125
126 /*
127 * Table with the patch locations to undo expolines
128 */
129 .nospec_call_table : {
130 __nospec_call_start = . ;
131 *(.s390_indirect*)
132 __nospec_call_end = . ;
133 }
134 .nospec_return_table : {
135 __nospec_return_start = . ;
136 *(.s390_return*)
137 __nospec_return_end = . ;
138 }
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 . = ALIGN(PAGE_SIZE);
146 __init_end = .; /* freed after init ends here */
147
148 BSS_SECTION(PAGE_SIZE, 4 * PAGE_SIZE, PAGE_SIZE)
149
150 _end = . ;
151
152 /* Debugging sections. */
153 STABS_DEBUG
154 DWARF_DEBUG
155
156 /* Sections to be discarded */
157 DISCARDS
158 /DISCARD/ : {
159 *(.eh_frame)
160 }
161}