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