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kbuild: warn about ld added unique sections
[mirror_ubuntu-jammy-kernel.git] / include / asm-generic / vmlinux.lds.h
CommitLineData
1da177e4
LT
1#ifndef LOAD_OFFSET
2#define LOAD_OFFSET 0
3#endif
4
5#ifndef VMLINUX_SYMBOL
6#define VMLINUX_SYMBOL(_sym_) _sym_
7#endif
8
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SR
9/* Align . to a 8 byte boundary equals to maximum function alignment. */
10#define ALIGN_FUNCTION() . = ALIGN(8)
11
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SR
12/* The actual configuration determine if the init/exit sections
13 * are handled as text/data or they can be discarded (which
14 * often happens at runtime)
15 */
16#ifdef CONFIG_HOTPLUG
17#define DEV_KEEP(sec) *(.dev##sec)
18#define DEV_DISCARD(sec)
19#else
20#define DEV_KEEP(sec)
21#define DEV_DISCARD(sec) *(.dev##sec)
22#endif
23
24#ifdef CONFIG_HOTPLUG_CPU
25#define CPU_KEEP(sec) *(.cpu##sec)
26#define CPU_DISCARD(sec)
27#else
28#define CPU_KEEP(sec)
29#define CPU_DISCARD(sec) *(.cpu##sec)
30#endif
31
1a3fb6d4 32#if defined(CONFIG_MEMORY_HOTPLUG)
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SR
33#define MEM_KEEP(sec) *(.mem##sec)
34#define MEM_DISCARD(sec)
35#else
36#define MEM_KEEP(sec)
37#define MEM_DISCARD(sec) *(.mem##sec)
38#endif
39
40
ca967258
SR
41/* .data section */
42#define DATA_DATA \
0e0d314e 43 *(.data) \
8256e47c 44 *(.data.init.refok) \
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SR
45 DEV_KEEP(init.data) \
46 DEV_KEEP(exit.data) \
47 CPU_KEEP(init.data) \
48 CPU_KEEP(exit.data) \
49 MEM_KEEP(init.data) \
50 MEM_KEEP(exit.data) \
8256e47c
MD
51 . = ALIGN(8); \
52 VMLINUX_SYMBOL(__start___markers) = .; \
53 *(__markers) \
54 VMLINUX_SYMBOL(__stop___markers) = .;
ca967258 55
4096b46f
SR
56#define RO_DATA(align) \
57 . = ALIGN((align)); \
1da177e4 58 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
6569580d 59 VMLINUX_SYMBOL(__start_rodata) = .; \
1da177e4
LT
60 *(.rodata) *(.rodata.*) \
61 *(__vermagic) /* Kernel version magic */ \
8256e47c 62 *(__markers_strings) /* Markers: strings */ \
1da177e4
LT
63 } \
64 \
65 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
66 *(.rodata1) \
67 } \
68 \
69 /* PCI quirks */ \
70 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
71 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
72 *(.pci_fixup_early) \
73 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
74 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
75 *(.pci_fixup_header) \
76 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
77 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
78 *(.pci_fixup_final) \
79 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
80 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
81 *(.pci_fixup_enable) \
82 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
1597cacb
AC
83 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
84 *(.pci_fixup_resume) \
85 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
1da177e4
LT
86 } \
87 \
394b701c
MP
88 /* RapidIO route ops */ \
89 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
90 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
91 *(.rio_route_ops) \
92 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
93 } \
94 \
1da177e4
LT
95 /* Kernel symbol table: Normal symbols */ \
96 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
97 VMLINUX_SYMBOL(__start___ksymtab) = .; \
98 *(__ksymtab) \
99 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
100 } \
101 \
102 /* Kernel symbol table: GPL-only symbols */ \
103 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
104 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
105 *(__ksymtab_gpl) \
106 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
107 } \
108 \
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AV
109 /* Kernel symbol table: Normal unused symbols */ \
110 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
111 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
112 *(__ksymtab_unused) \
113 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
114 } \
115 \
116 /* Kernel symbol table: GPL-only unused symbols */ \
117 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
118 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
119 *(__ksymtab_unused_gpl) \
120 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
121 } \
122 \
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GKH
123 /* Kernel symbol table: GPL-future-only symbols */ \
124 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
125 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
126 *(__ksymtab_gpl_future) \
127 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
128 } \
129 \
1da177e4
LT
130 /* Kernel symbol table: Normal symbols */ \
131 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
132 VMLINUX_SYMBOL(__start___kcrctab) = .; \
133 *(__kcrctab) \
134 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
135 } \
136 \
137 /* Kernel symbol table: GPL-only symbols */ \
138 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
139 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
140 *(__kcrctab_gpl) \
141 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
142 } \
143 \
f71d20e9
AV
144 /* Kernel symbol table: Normal unused symbols */ \
145 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
146 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
147 *(__kcrctab_unused) \
148 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
149 } \
150 \
151 /* Kernel symbol table: GPL-only unused symbols */ \
152 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
153 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
154 *(__kcrctab_unused_gpl) \
155 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
156 } \
157 \
9f28bb7e
GKH
158 /* Kernel symbol table: GPL-future-only symbols */ \
159 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
160 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
161 *(__kcrctab_gpl_future) \
162 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
163 } \
164 \
1da177e4
LT
165 /* Kernel symbol table: strings */ \
166 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
167 *(__ksymtab_strings) \
168 } \
169 \
eb8f6890
SR
170 /* __*init sections */ \
171 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
172 DEV_KEEP(init.rodata) \
173 DEV_KEEP(exit.rodata) \
174 CPU_KEEP(init.rodata) \
175 CPU_KEEP(exit.rodata) \
176 MEM_KEEP(init.rodata) \
177 MEM_KEEP(exit.rodata) \
178 } \
179 \
1da177e4
LT
180 /* Built-in module parameters. */ \
181 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
182 VMLINUX_SYMBOL(__start___param) = .; \
183 *(__param) \
184 VMLINUX_SYMBOL(__stop___param) = .; \
6569580d 185 VMLINUX_SYMBOL(__end_rodata) = .; \
7583ddfd 186 } \
4096b46f
SR
187 . = ALIGN((align));
188
189/* RODATA provided for backward compatibility.
190 * All archs are supposed to use RO_DATA() */
191#define RODATA RO_DATA(4096)
1da177e4
LT
192
193#define SECURITY_INIT \
60bad7fa 194 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
1da177e4
LT
195 VMLINUX_SYMBOL(__security_initcall_start) = .; \
196 *(.security_initcall.init) \
197 VMLINUX_SYMBOL(__security_initcall_end) = .; \
198 }
199
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SR
200/* .text section. Map to function alignment to avoid address changes
201 * during second ld run in second ld pass when generating System.map */
202#define TEXT_TEXT \
203 ALIGN_FUNCTION(); \
0e0d314e 204 *(.text) \
23ec23c2 205 *(.text.init.refok) \
eb8f6890
SR
206 *(.exit.text.refok) \
207 DEV_KEEP(init.text) \
208 DEV_KEEP(exit.text) \
209 CPU_KEEP(init.text) \
210 CPU_KEEP(exit.text) \
211 MEM_KEEP(init.text) \
212 MEM_KEEP(exit.text)
213
7664709b 214
6d30e3a8
SR
215/* sched.text is aling to function alignment to secure we have same
216 * address even at second ld pass when generating System.map */
1da177e4 217#define SCHED_TEXT \
6d30e3a8 218 ALIGN_FUNCTION(); \
1da177e4
LT
219 VMLINUX_SYMBOL(__sched_text_start) = .; \
220 *(.sched.text) \
221 VMLINUX_SYMBOL(__sched_text_end) = .;
222
6d30e3a8
SR
223/* spinlock.text is aling to function alignment to secure we have same
224 * address even at second ld pass when generating System.map */
1da177e4 225#define LOCK_TEXT \
6d30e3a8 226 ALIGN_FUNCTION(); \
1da177e4
LT
227 VMLINUX_SYMBOL(__lock_text_start) = .; \
228 *(.spinlock.text) \
229 VMLINUX_SYMBOL(__lock_text_end) = .;
d0aaff97
PP
230
231#define KPROBES_TEXT \
232 ALIGN_FUNCTION(); \
233 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
234 *(.kprobes.text) \
235 VMLINUX_SYMBOL(__kprobes_text_end) = .;
a7d0c210 236
01ba2bdc 237/* init and exit section handling */
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SR
238#define INIT_DATA \
239 *(.init.data) \
240 DEV_DISCARD(init.data) \
241 DEV_DISCARD(init.rodata) \
242 CPU_DISCARD(init.data) \
243 CPU_DISCARD(init.rodata) \
244 MEM_DISCARD(init.data) \
245 MEM_DISCARD(init.rodata)
246
247#define INIT_TEXT \
248 *(.init.text) \
249 DEV_DISCARD(init.text) \
250 CPU_DISCARD(init.text) \
251 MEM_DISCARD(init.text)
252
253#define EXIT_DATA \
254 *(.exit.data) \
255 DEV_DISCARD(exit.data) \
256 DEV_DISCARD(exit.rodata) \
257 CPU_DISCARD(exit.data) \
258 CPU_DISCARD(exit.rodata) \
259 MEM_DISCARD(exit.data) \
260 MEM_DISCARD(exit.rodata)
01ba2bdc 261
eb8f6890
SR
262#define EXIT_TEXT \
263 *(.exit.text) \
264 DEV_DISCARD(exit.text) \
265 CPU_DISCARD(exit.text) \
266 MEM_DISCARD(exit.text)
01ba2bdc 267
a7d0c210
PBG
268 /* DWARF debug sections.
269 Symbols in the DWARF debugging sections are relative to
270 the beginning of the section so we begin them at 0. */
271#define DWARF_DEBUG \
272 /* DWARF 1 */ \
273 .debug 0 : { *(.debug) } \
274 .line 0 : { *(.line) } \
275 /* GNU DWARF 1 extensions */ \
276 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
277 .debug_sfnames 0 : { *(.debug_sfnames) } \
278 /* DWARF 1.1 and DWARF 2 */ \
279 .debug_aranges 0 : { *(.debug_aranges) } \
280 .debug_pubnames 0 : { *(.debug_pubnames) } \
281 /* DWARF 2 */ \
282 .debug_info 0 : { *(.debug_info \
283 .gnu.linkonce.wi.*) } \
284 .debug_abbrev 0 : { *(.debug_abbrev) } \
285 .debug_line 0 : { *(.debug_line) } \
286 .debug_frame 0 : { *(.debug_frame) } \
287 .debug_str 0 : { *(.debug_str) } \
288 .debug_loc 0 : { *(.debug_loc) } \
289 .debug_macinfo 0 : { *(.debug_macinfo) } \
290 /* SGI/MIPS DWARF 2 extensions */ \
291 .debug_weaknames 0 : { *(.debug_weaknames) } \
292 .debug_funcnames 0 : { *(.debug_funcnames) } \
293 .debug_typenames 0 : { *(.debug_typenames) } \
294 .debug_varnames 0 : { *(.debug_varnames) } \
295
296 /* Stabs debugging sections. */
297#define STABS_DEBUG \
298 .stab 0 : { *(.stab) } \
299 .stabstr 0 : { *(.stabstr) } \
300 .stab.excl 0 : { *(.stab.excl) } \
301 .stab.exclstr 0 : { *(.stab.exclstr) } \
302 .stab.index 0 : { *(.stab.index) } \
303 .stab.indexstr 0 : { *(.stab.indexstr) } \
304 .comment 0 : { *(.comment) }
9c9b8b38 305
7664c5a1
JF
306#define BUG_TABLE \
307 . = ALIGN(8); \
308 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
309 __start___bug_table = .; \
310 *(__bug_table) \
311 __stop___bug_table = .; \
312 }
313
9c9b8b38 314#define NOTES \
cbe87121
RM
315 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
316 VMLINUX_SYMBOL(__start_notes) = .; \
317 *(.note.*) \
318 VMLINUX_SYMBOL(__stop_notes) = .; \
319 }
61ce1efe
AM
320
321#define INITCALLS \
b3438f82
LT
322 *(.initcall0.init) \
323 *(.initcall0s.init) \
61ce1efe 324 *(.initcall1.init) \
735a7ffb 325 *(.initcall1s.init) \
61ce1efe 326 *(.initcall2.init) \
735a7ffb 327 *(.initcall2s.init) \
61ce1efe 328 *(.initcall3.init) \
735a7ffb 329 *(.initcall3s.init) \
61ce1efe 330 *(.initcall4.init) \
735a7ffb 331 *(.initcall4s.init) \
61ce1efe 332 *(.initcall5.init) \
735a7ffb 333 *(.initcall5s.init) \
8d610dd5 334 *(.initcallrootfs.init) \
61ce1efe 335 *(.initcall6.init) \
735a7ffb
AM
336 *(.initcall6s.init) \
337 *(.initcall7.init) \
338 *(.initcall7s.init)
61ce1efe 339
5fb7dc37
FY
340#define PERCPU(align) \
341 . = ALIGN(align); \
342 __per_cpu_start = .; \
343 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
344 *(.data.percpu) \
345 *(.data.percpu.shared_aligned) \
346 } \
347 __per_cpu_end = .;