Commit | Line | Data |
---|---|---|
ef53dae8 SR |
1 | /* |
2 | * Helper macros to support writing architecture specific | |
3 | * linker scripts. | |
4 | * | |
5 | * A minimal linker scripts has following content: | |
6 | * [This is a sample, architectures may have special requiriements] | |
7 | * | |
8 | * OUTPUT_FORMAT(...) | |
9 | * OUTPUT_ARCH(...) | |
10 | * ENTRY(...) | |
11 | * SECTIONS | |
12 | * { | |
13 | * . = START; | |
14 | * __init_begin = .; | |
7923f90f | 15 | * HEAD_TEXT_SECTION |
ef53dae8 SR |
16 | * INIT_TEXT_SECTION(PAGE_SIZE) |
17 | * INIT_DATA_SECTION(...) | |
18 | * PERCPU(PAGE_SIZE) | |
19 | * __init_end = .; | |
20 | * | |
21 | * _stext = .; | |
22 | * TEXT_SECTION = 0 | |
23 | * _etext = .; | |
24 | * | |
25 | * _sdata = .; | |
26 | * RO_DATA_SECTION(PAGE_SIZE) | |
27 | * RW_DATA_SECTION(...) | |
28 | * _edata = .; | |
29 | * | |
30 | * EXCEPTION_TABLE(...) | |
31 | * NOTES | |
32 | * | |
04e448d9 | 33 | * BSS_SECTION(0, 0, 0) |
ef53dae8 SR |
34 | * _end = .; |
35 | * | |
ef53dae8 SR |
36 | * STABS_DEBUG |
37 | * DWARF_DEBUG | |
023bf6f1 TH |
38 | * |
39 | * DISCARDS // must be the last | |
ef53dae8 SR |
40 | * } |
41 | * | |
42 | * [__init_begin, __init_end] is the init section that may be freed after init | |
43 | * [_stext, _etext] is the text section | |
44 | * [_sdata, _edata] is the data section | |
45 | * | |
46 | * Some of the included output section have their own set of constants. | |
47 | * Examples are: [__initramfs_start, __initramfs_end] for initramfs and | |
48 | * [__nosave_begin, __nosave_end] for the nosave data | |
49 | */ | |
c80d471a | 50 | |
1da177e4 LT |
51 | #ifndef LOAD_OFFSET |
52 | #define LOAD_OFFSET 0 | |
53 | #endif | |
54 | ||
55 | #ifndef VMLINUX_SYMBOL | |
56 | #define VMLINUX_SYMBOL(_sym_) _sym_ | |
57 | #endif | |
58 | ||
6d30e3a8 SR |
59 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
60 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
61 | ||
eb8f6890 SR |
62 | /* The actual configuration determine if the init/exit sections |
63 | * are handled as text/data or they can be discarded (which | |
64 | * often happens at runtime) | |
65 | */ | |
66 | #ifdef CONFIG_HOTPLUG | |
67 | #define DEV_KEEP(sec) *(.dev##sec) | |
68 | #define DEV_DISCARD(sec) | |
69 | #else | |
70 | #define DEV_KEEP(sec) | |
71 | #define DEV_DISCARD(sec) *(.dev##sec) | |
72 | #endif | |
73 | ||
74 | #ifdef CONFIG_HOTPLUG_CPU | |
75 | #define CPU_KEEP(sec) *(.cpu##sec) | |
76 | #define CPU_DISCARD(sec) | |
77 | #else | |
78 | #define CPU_KEEP(sec) | |
79 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
80 | #endif | |
81 | ||
1a3fb6d4 | 82 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
83 | #define MEM_KEEP(sec) *(.mem##sec) |
84 | #define MEM_DISCARD(sec) | |
85 | #else | |
86 | #define MEM_KEEP(sec) | |
87 | #define MEM_DISCARD(sec) *(.mem##sec) | |
88 | #endif | |
89 | ||
8da3821b SR |
90 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
91 | #define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
92 | *(__mcount_loc) \ | |
93 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
94 | #else | |
95 | #define MCOUNT_REC() | |
96 | #endif | |
eb8f6890 | 97 | |
2ed84eeb | 98 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
99 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
100 | *(_ftrace_annotated_branch) \ | |
101 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
102 | #else |
103 | #define LIKELY_PROFILE() | |
104 | #endif | |
105 | ||
2bcd521a SR |
106 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
107 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
108 | *(_ftrace_branch) \ | |
109 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
110 | #else | |
111 | #define BRANCH_PROFILE() | |
112 | #endif | |
113 | ||
5f77a88b | 114 | #ifdef CONFIG_EVENT_TRACING |
b77e38aa SR |
115 | #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ |
116 | *(_ftrace_events) \ | |
117 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
118 | #else | |
119 | #define FTRACE_EVENTS() | |
120 | #endif | |
121 | ||
1ba28e02 LJ |
122 | #ifdef CONFIG_TRACING |
123 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
124 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
125 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
126 | #else | |
127 | #define TRACE_PRINTKS() | |
128 | #endif | |
129 | ||
bed1ffca FW |
130 | #ifdef CONFIG_FTRACE_SYSCALLS |
131 | #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
132 | *(__syscalls_metadata) \ | |
133 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
134 | #else | |
135 | #define TRACE_SYSCALLS() | |
136 | #endif | |
137 | ||
ca967258 SR |
138 | /* .data section */ |
139 | #define DATA_DATA \ | |
0e0d314e | 140 | *(.data) \ |
312b1485 | 141 | *(.ref.data) \ |
eb8f6890 SR |
142 | DEV_KEEP(init.data) \ |
143 | DEV_KEEP(exit.data) \ | |
144 | CPU_KEEP(init.data) \ | |
145 | CPU_KEEP(exit.data) \ | |
146 | MEM_KEEP(init.data) \ | |
147 | MEM_KEEP(exit.data) \ | |
8256e47c MD |
148 | . = ALIGN(8); \ |
149 | VMLINUX_SYMBOL(__start___markers) = .; \ | |
150 | *(__markers) \ | |
97e1c18e | 151 | VMLINUX_SYMBOL(__stop___markers) = .; \ |
7e066fb8 | 152 | . = ALIGN(32); \ |
97e1c18e MD |
153 | VMLINUX_SYMBOL(__start___tracepoints) = .; \ |
154 | *(__tracepoints) \ | |
1f0d69a9 | 155 | VMLINUX_SYMBOL(__stop___tracepoints) = .; \ |
e9d376f0 JB |
156 | /* implement dynamic printk debug */ \ |
157 | . = ALIGN(8); \ | |
158 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
159 | *(__verbose) \ | |
160 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 161 | LIKELY_PROFILE() \ |
b77e38aa | 162 | BRANCH_PROFILE() \ |
8a20d84d | 163 | TRACE_PRINTKS() \ |
bed1ffca FW |
164 | FTRACE_EVENTS() \ |
165 | TRACE_SYSCALLS() | |
ca967258 | 166 | |
ef53dae8 SR |
167 | /* |
168 | * Data section helpers | |
169 | */ | |
170 | #define NOSAVE_DATA \ | |
171 | . = ALIGN(PAGE_SIZE); \ | |
172 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
173 | *(.data.nosave) \ | |
174 | . = ALIGN(PAGE_SIZE); \ | |
175 | VMLINUX_SYMBOL(__nosave_end) = .; | |
176 | ||
177 | #define PAGE_ALIGNED_DATA(page_align) \ | |
178 | . = ALIGN(page_align); \ | |
179 | *(.data.page_aligned) | |
180 | ||
181 | #define READ_MOSTLY_DATA(align) \ | |
182 | . = ALIGN(align); \ | |
183 | *(.data.read_mostly) | |
184 | ||
185 | #define CACHELINE_ALIGNED_DATA(align) \ | |
186 | . = ALIGN(align); \ | |
187 | *(.data.cacheline_aligned) | |
188 | ||
39a449d9 | 189 | #define INIT_TASK_DATA(align) \ |
ef53dae8 SR |
190 | . = ALIGN(align); \ |
191 | *(.data.init_task) | |
192 | ||
193 | /* | |
194 | * Read only Data | |
195 | */ | |
196 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 197 | . = ALIGN((align)); \ |
1da177e4 | 198 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 199 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
200 | *(.rodata) *(.rodata.*) \ |
201 | *(__vermagic) /* Kernel version magic */ \ | |
8256e47c | 202 | *(__markers_strings) /* Markers: strings */ \ |
97e1c18e | 203 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
204 | } \ |
205 | \ | |
206 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
207 | *(.rodata1) \ | |
208 | } \ | |
209 | \ | |
6360b1fb JB |
210 | BUG_TABLE \ |
211 | \ | |
1da177e4 LT |
212 | /* PCI quirks */ \ |
213 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
214 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
215 | *(.pci_fixup_early) \ | |
216 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
217 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
218 | *(.pci_fixup_header) \ | |
219 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
220 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
221 | *(.pci_fixup_final) \ | |
222 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
223 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
224 | *(.pci_fixup_enable) \ | |
225 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
226 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
227 | *(.pci_fixup_resume) \ | |
228 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
229 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
230 | *(.pci_fixup_resume_early) \ | |
231 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
232 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
233 | *(.pci_fixup_suspend) \ | |
234 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
1da177e4 LT |
235 | } \ |
236 | \ | |
5658c769 DW |
237 | /* Built-in firmware blobs */ \ |
238 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
239 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
240 | *(.builtin_fw) \ | |
241 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
242 | } \ | |
243 | \ | |
394b701c MP |
244 | /* RapidIO route ops */ \ |
245 | .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \ | |
246 | VMLINUX_SYMBOL(__start_rio_route_ops) = .; \ | |
247 | *(.rio_route_ops) \ | |
248 | VMLINUX_SYMBOL(__end_rio_route_ops) = .; \ | |
249 | } \ | |
250 | \ | |
63687a52 JB |
251 | TRACEDATA \ |
252 | \ | |
1da177e4 LT |
253 | /* Kernel symbol table: Normal symbols */ \ |
254 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
255 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
256 | *(__ksymtab) \ | |
257 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ | |
258 | } \ | |
259 | \ | |
260 | /* Kernel symbol table: GPL-only symbols */ \ | |
261 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
262 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
263 | *(__ksymtab_gpl) \ | |
264 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ | |
265 | } \ | |
266 | \ | |
f71d20e9 AV |
267 | /* Kernel symbol table: Normal unused symbols */ \ |
268 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
269 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
270 | *(__ksymtab_unused) \ | |
271 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ | |
272 | } \ | |
273 | \ | |
274 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
275 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
276 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
277 | *(__ksymtab_unused_gpl) \ | |
278 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ | |
279 | } \ | |
280 | \ | |
9f28bb7e GKH |
281 | /* Kernel symbol table: GPL-future-only symbols */ \ |
282 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
283 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
284 | *(__ksymtab_gpl_future) \ | |
285 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ | |
286 | } \ | |
287 | \ | |
1da177e4 LT |
288 | /* Kernel symbol table: Normal symbols */ \ |
289 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
290 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
291 | *(__kcrctab) \ | |
292 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ | |
293 | } \ | |
294 | \ | |
295 | /* Kernel symbol table: GPL-only symbols */ \ | |
296 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
297 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
298 | *(__kcrctab_gpl) \ | |
299 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ | |
300 | } \ | |
301 | \ | |
f71d20e9 AV |
302 | /* Kernel symbol table: Normal unused symbols */ \ |
303 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
304 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
305 | *(__kcrctab_unused) \ | |
306 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ | |
307 | } \ | |
308 | \ | |
309 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
310 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
311 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
312 | *(__kcrctab_unused_gpl) \ | |
313 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ | |
314 | } \ | |
315 | \ | |
9f28bb7e GKH |
316 | /* Kernel symbol table: GPL-future-only symbols */ \ |
317 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
318 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
319 | *(__kcrctab_gpl_future) \ | |
320 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ | |
321 | } \ | |
322 | \ | |
1da177e4 LT |
323 | /* Kernel symbol table: strings */ \ |
324 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
325 | *(__ksymtab_strings) \ | |
326 | } \ | |
327 | \ | |
eb8f6890 SR |
328 | /* __*init sections */ \ |
329 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 330 | *(.ref.rodata) \ |
8da3821b | 331 | MCOUNT_REC() \ |
eb8f6890 SR |
332 | DEV_KEEP(init.rodata) \ |
333 | DEV_KEEP(exit.rodata) \ | |
334 | CPU_KEEP(init.rodata) \ | |
335 | CPU_KEEP(exit.rodata) \ | |
336 | MEM_KEEP(init.rodata) \ | |
337 | MEM_KEEP(exit.rodata) \ | |
338 | } \ | |
339 | \ | |
1da177e4 LT |
340 | /* Built-in module parameters. */ \ |
341 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
342 | VMLINUX_SYMBOL(__start___param) = .; \ | |
343 | *(__param) \ | |
344 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
edeed305 | 345 | . = ALIGN((align)); \ |
6569580d | 346 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 347 | } \ |
4096b46f SR |
348 | . = ALIGN((align)); |
349 | ||
ef53dae8 | 350 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 351 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
352 | #define RODATA RO_DATA_SECTION(4096) |
353 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
354 | |
355 | #define SECURITY_INIT \ | |
60bad7fa | 356 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
357 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
358 | *(.security_initcall.init) \ | |
359 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
360 | } | |
361 | ||
7664709b SR |
362 | /* .text section. Map to function alignment to avoid address changes |
363 | * during second ld run in second ld pass when generating System.map */ | |
364 | #define TEXT_TEXT \ | |
365 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 366 | *(.text.hot) \ |
0e0d314e | 367 | *(.text) \ |
312b1485 | 368 | *(.ref.text) \ |
eb8f6890 SR |
369 | DEV_KEEP(init.text) \ |
370 | DEV_KEEP(exit.text) \ | |
371 | CPU_KEEP(init.text) \ | |
372 | CPU_KEEP(exit.text) \ | |
373 | MEM_KEEP(init.text) \ | |
fb5e2b37 JB |
374 | MEM_KEEP(exit.text) \ |
375 | *(.text.unlikely) | |
eb8f6890 | 376 | |
7664709b | 377 | |
6d30e3a8 SR |
378 | /* sched.text is aling to function alignment to secure we have same |
379 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 380 | #define SCHED_TEXT \ |
6d30e3a8 | 381 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
382 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
383 | *(.sched.text) \ | |
384 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
385 | ||
6d30e3a8 SR |
386 | /* spinlock.text is aling to function alignment to secure we have same |
387 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 388 | #define LOCK_TEXT \ |
6d30e3a8 | 389 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
390 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
391 | *(.spinlock.text) \ | |
392 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
393 | |
394 | #define KPROBES_TEXT \ | |
395 | ALIGN_FUNCTION(); \ | |
396 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
397 | *(.kprobes.text) \ | |
398 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 399 | |
a0343e82 FW |
400 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
401 | #define IRQENTRY_TEXT \ | |
402 | ALIGN_FUNCTION(); \ | |
403 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
404 | *(.irqentry.text) \ | |
405 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
406 | #else | |
407 | #define IRQENTRY_TEXT | |
408 | #endif | |
409 | ||
37c514e3 | 410 | /* Section used for early init (in .S files) */ |
7923f90f | 411 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 412 | |
7923f90f | 413 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
414 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
415 | HEAD_TEXT \ | |
416 | } | |
417 | ||
418 | /* | |
419 | * Exception table | |
420 | */ | |
421 | #define EXCEPTION_TABLE(align) \ | |
422 | . = ALIGN(align); \ | |
423 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
424 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
425 | *(__ex_table) \ | |
426 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
427 | } | |
428 | ||
429 | /* | |
430 | * Init task | |
431 | */ | |
39a449d9 | 432 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 SR |
433 | . = ALIGN(align); \ |
434 | .data.init_task : { \ | |
39a449d9 | 435 | INIT_TASK_DATA(align) \ |
ef53dae8 | 436 | } |
37c514e3 | 437 | |
b99b87f7 | 438 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
439 | #define KERNEL_CTORS() . = ALIGN(8); \ |
440 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 PO |
441 | *(.ctors) \ |
442 | VMLINUX_SYMBOL(__ctors_end) = .; | |
443 | #else | |
444 | #define KERNEL_CTORS() | |
445 | #endif | |
446 | ||
01ba2bdc | 447 | /* init and exit section handling */ |
eb8f6890 SR |
448 | #define INIT_DATA \ |
449 | *(.init.data) \ | |
450 | DEV_DISCARD(init.data) \ | |
eb8f6890 | 451 | CPU_DISCARD(init.data) \ |
eb8f6890 | 452 | MEM_DISCARD(init.data) \ |
b99b87f7 | 453 | KERNEL_CTORS() \ |
fd6c3a8d JB |
454 | *(.init.rodata) \ |
455 | DEV_DISCARD(init.rodata) \ | |
456 | CPU_DISCARD(init.rodata) \ | |
e9d376f0 | 457 | MEM_DISCARD(init.rodata) |
eb8f6890 SR |
458 | |
459 | #define INIT_TEXT \ | |
460 | *(.init.text) \ | |
461 | DEV_DISCARD(init.text) \ | |
462 | CPU_DISCARD(init.text) \ | |
463 | MEM_DISCARD(init.text) | |
464 | ||
465 | #define EXIT_DATA \ | |
466 | *(.exit.data) \ | |
467 | DEV_DISCARD(exit.data) \ | |
468 | DEV_DISCARD(exit.rodata) \ | |
469 | CPU_DISCARD(exit.data) \ | |
470 | CPU_DISCARD(exit.rodata) \ | |
471 | MEM_DISCARD(exit.data) \ | |
472 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 473 | |
eb8f6890 SR |
474 | #define EXIT_TEXT \ |
475 | *(.exit.text) \ | |
476 | DEV_DISCARD(exit.text) \ | |
477 | CPU_DISCARD(exit.text) \ | |
478 | MEM_DISCARD(exit.text) | |
01ba2bdc | 479 | |
7923f90f SR |
480 | #define EXIT_CALL \ |
481 | *(.exitcall.exit) | |
482 | ||
ef53dae8 SR |
483 | /* |
484 | * bss (Block Started by Symbol) - uninitialized data | |
485 | * zeroed during startup | |
486 | */ | |
04e448d9 TA |
487 | #define SBSS(sbss_align) \ |
488 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
489 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
490 | *(.sbss) \ | |
491 | *(.scommon) \ | |
492 | } | |
493 | ||
494 | #define BSS(bss_align) \ | |
495 | . = ALIGN(bss_align); \ | |
496 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
ef53dae8 SR |
497 | *(.bss.page_aligned) \ |
498 | *(.dynbss) \ | |
499 | *(.bss) \ | |
500 | *(COMMON) \ | |
ef53dae8 SR |
501 | } |
502 | ||
503 | /* | |
504 | * DWARF debug sections. | |
505 | * Symbols in the DWARF debugging sections are relative to | |
506 | * the beginning of the section so we begin them at 0. | |
507 | */ | |
a7d0c210 PBG |
508 | #define DWARF_DEBUG \ |
509 | /* DWARF 1 */ \ | |
510 | .debug 0 : { *(.debug) } \ | |
511 | .line 0 : { *(.line) } \ | |
512 | /* GNU DWARF 1 extensions */ \ | |
513 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
514 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
515 | /* DWARF 1.1 and DWARF 2 */ \ | |
516 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
517 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
518 | /* DWARF 2 */ \ | |
519 | .debug_info 0 : { *(.debug_info \ | |
520 | .gnu.linkonce.wi.*) } \ | |
521 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
522 | .debug_line 0 : { *(.debug_line) } \ | |
523 | .debug_frame 0 : { *(.debug_frame) } \ | |
524 | .debug_str 0 : { *(.debug_str) } \ | |
525 | .debug_loc 0 : { *(.debug_loc) } \ | |
526 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
527 | /* SGI/MIPS DWARF 2 extensions */ \ | |
528 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
529 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
530 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
531 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
532 | ||
533 | /* Stabs debugging sections. */ | |
534 | #define STABS_DEBUG \ | |
535 | .stab 0 : { *(.stab) } \ | |
536 | .stabstr 0 : { *(.stabstr) } \ | |
537 | .stab.excl 0 : { *(.stab.excl) } \ | |
538 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
539 | .stab.index 0 : { *(.stab.index) } \ | |
540 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
541 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 542 | |
6360b1fb | 543 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
544 | #define BUG_TABLE \ |
545 | . = ALIGN(8); \ | |
546 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 547 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 548 | *(__bug_table) \ |
c6de0026 | 549 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 550 | } |
6360b1fb JB |
551 | #else |
552 | #define BUG_TABLE | |
553 | #endif | |
7664c5a1 | 554 | |
63687a52 JB |
555 | #ifdef CONFIG_PM_TRACE |
556 | #define TRACEDATA \ | |
557 | . = ALIGN(4); \ | |
558 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 559 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 560 | *(.tracedata) \ |
c6de0026 | 561 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
562 | } |
563 | #else | |
564 | #define TRACEDATA | |
565 | #endif | |
566 | ||
9c9b8b38 | 567 | #define NOTES \ |
cbe87121 RM |
568 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
569 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
570 | *(.note.*) \ | |
571 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
572 | } | |
61ce1efe | 573 | |
ef53dae8 SR |
574 | #define INIT_SETUP(initsetup_align) \ |
575 | . = ALIGN(initsetup_align); \ | |
576 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
577 | *(.init.setup) \ | |
578 | VMLINUX_SYMBOL(__setup_end) = .; | |
579 | ||
61ce1efe | 580 | #define INITCALLS \ |
c2147a50 | 581 | *(.initcallearly.init) \ |
c6de0026 | 582 | VMLINUX_SYMBOL(__early_initcall_end) = .; \ |
b3438f82 LT |
583 | *(.initcall0.init) \ |
584 | *(.initcall0s.init) \ | |
61ce1efe | 585 | *(.initcall1.init) \ |
735a7ffb | 586 | *(.initcall1s.init) \ |
61ce1efe | 587 | *(.initcall2.init) \ |
735a7ffb | 588 | *(.initcall2s.init) \ |
61ce1efe | 589 | *(.initcall3.init) \ |
735a7ffb | 590 | *(.initcall3s.init) \ |
61ce1efe | 591 | *(.initcall4.init) \ |
735a7ffb | 592 | *(.initcall4s.init) \ |
61ce1efe | 593 | *(.initcall5.init) \ |
735a7ffb | 594 | *(.initcall5s.init) \ |
8d610dd5 | 595 | *(.initcallrootfs.init) \ |
61ce1efe | 596 | *(.initcall6.init) \ |
735a7ffb AM |
597 | *(.initcall6s.init) \ |
598 | *(.initcall7.init) \ | |
599 | *(.initcall7s.init) | |
61ce1efe | 600 | |
ef53dae8 SR |
601 | #define INIT_CALLS \ |
602 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
603 | INITCALLS \ | |
604 | VMLINUX_SYMBOL(__initcall_end) = .; | |
605 | ||
606 | #define CON_INITCALL \ | |
607 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
608 | *(.con_initcall.init) \ | |
609 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
610 | ||
611 | #define SECURITY_INITCALL \ | |
612 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
613 | *(.security_initcall.init) \ | |
614 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
615 | ||
616 | #ifdef CONFIG_BLK_DEV_INITRD | |
617 | #define INIT_RAM_FS \ | |
618 | . = ALIGN(PAGE_SIZE); \ | |
619 | VMLINUX_SYMBOL(__initramfs_start) = .; \ | |
620 | *(.init.ramfs) \ | |
621 | VMLINUX_SYMBOL(__initramfs_end) = .; | |
622 | #else | |
eadfe219 | 623 | #define INIT_RAM_FS |
ef53dae8 SR |
624 | #endif |
625 | ||
023bf6f1 TH |
626 | /* |
627 | * Default discarded sections. | |
628 | * | |
629 | * Some archs want to discard exit text/data at runtime rather than | |
630 | * link time due to cross-section references such as alt instructions, | |
631 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
632 | * section definitions so that such archs put those in earlier section | |
633 | * definitions. | |
634 | */ | |
405d967d TH |
635 | #define DISCARDS \ |
636 | /DISCARD/ : { \ | |
637 | EXIT_TEXT \ | |
638 | EXIT_DATA \ | |
023bf6f1 | 639 | EXIT_CALL \ |
405d967d TH |
640 | *(.discard) \ |
641 | } | |
642 | ||
3e5d8f97 | 643 | /** |
6b7c38d5 | 644 | * PERCPU_VADDR - define output section for percpu area |
3e5d8f97 TH |
645 | * @vaddr: explicit base address (optional) |
646 | * @phdr: destination PHDR (optional) | |
647 | * | |
648 | * Macro which expands to output section for percpu area. If @vaddr | |
649 | * is not blank, it specifies explicit base address and all percpu | |
650 | * symbols will be offset from the given address. If blank, @vaddr | |
651 | * always equals @laddr + LOAD_OFFSET. | |
652 | * | |
653 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
654 | * output PHDR is sticky. If @phdr is specified, the next output | |
655 | * section in the linker script will go there too. @phdr should have | |
656 | * a leading colon. | |
657 | * | |
3ac6cffe TH |
658 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
659 | * If there is no need to put the percpu section at a predetermined | |
660 | * address, use PERCPU(). | |
3e5d8f97 TH |
661 | */ |
662 | #define PERCPU_VADDR(vaddr, phdr) \ | |
dba3d36b IM |
663 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
664 | .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ | |
6b7c38d5 TH |
665 | - LOAD_OFFSET) { \ |
666 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
0bd74fa8 | 667 | *(.data.percpu.first) \ |
63cc8c75 | 668 | *(.data.percpu.page_aligned) \ |
5fb7dc37 FY |
669 | *(.data.percpu) \ |
670 | *(.data.percpu.shared_aligned) \ | |
6b7c38d5 TH |
671 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
672 | } phdr \ | |
dba3d36b | 673 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu); |
3e5d8f97 TH |
674 | |
675 | /** | |
676 | * PERCPU - define output section for percpu area, simple version | |
677 | * @align: required alignment | |
678 | * | |
679 | * Align to @align and outputs output section for percpu area. This | |
680 | * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and | |
681 | * __per_cpu_start will be identical. | |
3ac6cffe TH |
682 | * |
683 | * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except | |
684 | * that __per_cpu_load is defined as a relative symbol against | |
685 | * .data.percpu which is required for relocatable x86_32 | |
686 | * configuration. | |
3e5d8f97 | 687 | */ |
5fb7dc37 FY |
688 | #define PERCPU(align) \ |
689 | . = ALIGN(align); \ | |
3ac6cffe TH |
690 | .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \ |
691 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ | |
692 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
693 | *(.data.percpu.first) \ | |
63cc8c75 | 694 | *(.data.percpu.page_aligned) \ |
5fb7dc37 FY |
695 | *(.data.percpu) \ |
696 | *(.data.percpu.shared_aligned) \ | |
3ac6cffe TH |
697 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
698 | } | |
ef53dae8 SR |
699 | |
700 | ||
701 | /* | |
702 | * Definition of the high level *_SECTION macros | |
703 | * They will fit only a subset of the architectures | |
704 | */ | |
705 | ||
706 | ||
707 | /* | |
708 | * Writeable data. | |
709 | * All sections are combined in a single .data section. | |
710 | * The sections following CONSTRUCTORS are arranged so their | |
711 | * typical alignment matches. | |
712 | * A cacheline is typical/always less than a PAGE_SIZE so | |
713 | * the sections that has this restriction (or similar) | |
714 | * is located before the ones requiring PAGE_SIZE alignment. | |
715 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
716 | * matches the requirment of PAGE_ALIGNED_DATA. | |
717 | * | |
7923f90f | 718 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 719 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
720 | . = ALIGN(PAGE_SIZE); \ |
721 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 722 | INIT_TASK_DATA(inittask) \ |
ef53dae8 SR |
723 | CACHELINE_ALIGNED_DATA(cacheline) \ |
724 | READ_MOSTLY_DATA(cacheline) \ | |
725 | DATA_DATA \ | |
726 | CONSTRUCTORS \ | |
73f1d939 | 727 | NOSAVE_DATA \ |
ef53dae8 SR |
728 | PAGE_ALIGNED_DATA(pagealigned) \ |
729 | } | |
730 | ||
731 | #define INIT_TEXT_SECTION(inittext_align) \ | |
732 | . = ALIGN(inittext_align); \ | |
733 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
734 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
735 | INIT_TEXT \ | |
736 | VMLINUX_SYMBOL(_einittext) = .; \ | |
737 | } | |
738 | ||
739 | #define INIT_DATA_SECTION(initsetup_align) \ | |
740 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
741 | INIT_DATA \ | |
742 | INIT_SETUP(initsetup_align) \ | |
743 | INIT_CALLS \ | |
744 | CON_INITCALL \ | |
745 | SECURITY_INITCALL \ | |
746 | INIT_RAM_FS \ | |
747 | } | |
748 | ||
04e448d9 TA |
749 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
750 | . = ALIGN(sbss_align); \ | |
751 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
752 | SBSS(sbss_align) \ | |
ef53dae8 | 753 | BSS(bss_align) \ |
04e448d9 TA |
754 | . = ALIGN(stop_align); \ |
755 | VMLINUX_SYMBOL(__bss_stop) = .; |