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Commit | Line | Data |
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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 | ||
9e1b9b80 AJ |
55 | #ifndef SYMBOL_PREFIX |
56 | #define VMLINUX_SYMBOL(sym) sym | |
57 | #else | |
58 | #define PASTE2(x,y) x##y | |
59 | #define PASTE(x,y) PASTE2(x,y) | |
60 | #define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym) | |
1da177e4 LT |
61 | #endif |
62 | ||
6d30e3a8 SR |
63 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
64 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
65 | ||
07fca0e5 SR |
66 | /* |
67 | * Align to a 32 byte boundary equal to the | |
68 | * alignment gcc 4.5 uses for a struct | |
69 | */ | |
70 | #define STRUCT_ALIGN() . = ALIGN(32) | |
71 | ||
eb8f6890 SR |
72 | /* The actual configuration determine if the init/exit sections |
73 | * are handled as text/data or they can be discarded (which | |
74 | * often happens at runtime) | |
75 | */ | |
76 | #ifdef CONFIG_HOTPLUG | |
77 | #define DEV_KEEP(sec) *(.dev##sec) | |
78 | #define DEV_DISCARD(sec) | |
79 | #else | |
80 | #define DEV_KEEP(sec) | |
81 | #define DEV_DISCARD(sec) *(.dev##sec) | |
82 | #endif | |
83 | ||
84 | #ifdef CONFIG_HOTPLUG_CPU | |
85 | #define CPU_KEEP(sec) *(.cpu##sec) | |
86 | #define CPU_DISCARD(sec) | |
87 | #else | |
88 | #define CPU_KEEP(sec) | |
89 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
90 | #endif | |
91 | ||
1a3fb6d4 | 92 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
93 | #define MEM_KEEP(sec) *(.mem##sec) |
94 | #define MEM_DISCARD(sec) | |
95 | #else | |
96 | #define MEM_KEEP(sec) | |
97 | #define MEM_DISCARD(sec) *(.mem##sec) | |
98 | #endif | |
99 | ||
8da3821b | 100 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
101 | #define MCOUNT_REC() . = ALIGN(8); \ |
102 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
103 | *(__mcount_loc) \ |
104 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
105 | #else | |
106 | #define MCOUNT_REC() | |
107 | #endif | |
eb8f6890 | 108 | |
2ed84eeb | 109 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
110 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
111 | *(_ftrace_annotated_branch) \ | |
112 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
113 | #else |
114 | #define LIKELY_PROFILE() | |
115 | #endif | |
116 | ||
2bcd521a SR |
117 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
118 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
119 | *(_ftrace_branch) \ | |
120 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
121 | #else | |
122 | #define BRANCH_PROFILE() | |
123 | #endif | |
124 | ||
5f77a88b | 125 | #ifdef CONFIG_EVENT_TRACING |
b77e38aa SR |
126 | #define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \ |
127 | *(_ftrace_events) \ | |
128 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
129 | #else | |
130 | #define FTRACE_EVENTS() | |
131 | #endif | |
132 | ||
1ba28e02 LJ |
133 | #ifdef CONFIG_TRACING |
134 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
135 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
136 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
137 | #else | |
138 | #define TRACE_PRINTKS() | |
139 | #endif | |
140 | ||
bed1ffca FW |
141 | #ifdef CONFIG_FTRACE_SYSCALLS |
142 | #define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
143 | *(__syscalls_metadata) \ | |
144 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
145 | #else | |
146 | #define TRACE_SYSCALLS() | |
147 | #endif | |
148 | ||
ca967258 SR |
149 | /* .data section */ |
150 | #define DATA_DATA \ | |
0e0d314e | 151 | *(.data) \ |
312b1485 | 152 | *(.ref.data) \ |
eb8f6890 SR |
153 | DEV_KEEP(init.data) \ |
154 | DEV_KEEP(exit.data) \ | |
155 | CPU_KEEP(init.data) \ | |
156 | CPU_KEEP(exit.data) \ | |
157 | MEM_KEEP(init.data) \ | |
158 | MEM_KEEP(exit.data) \ | |
8256e47c MD |
159 | . = ALIGN(8); \ |
160 | VMLINUX_SYMBOL(__start___markers) = .; \ | |
161 | *(__markers) \ | |
97e1c18e | 162 | VMLINUX_SYMBOL(__stop___markers) = .; \ |
7e066fb8 | 163 | . = ALIGN(32); \ |
97e1c18e MD |
164 | VMLINUX_SYMBOL(__start___tracepoints) = .; \ |
165 | *(__tracepoints) \ | |
1f0d69a9 | 166 | VMLINUX_SYMBOL(__stop___tracepoints) = .; \ |
e9d376f0 JB |
167 | /* implement dynamic printk debug */ \ |
168 | . = ALIGN(8); \ | |
169 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
170 | *(__verbose) \ | |
171 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 172 | LIKELY_PROFILE() \ |
b77e38aa | 173 | BRANCH_PROFILE() \ |
8a20d84d | 174 | TRACE_PRINTKS() \ |
07fca0e5 SR |
175 | \ |
176 | STRUCT_ALIGN(); \ | |
bed1ffca | 177 | FTRACE_EVENTS() \ |
07fca0e5 SR |
178 | \ |
179 | STRUCT_ALIGN(); \ | |
bed1ffca | 180 | TRACE_SYSCALLS() |
ca967258 | 181 | |
ef53dae8 SR |
182 | /* |
183 | * Data section helpers | |
184 | */ | |
185 | #define NOSAVE_DATA \ | |
186 | . = ALIGN(PAGE_SIZE); \ | |
187 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 188 | *(.data..nosave) \ |
ef53dae8 SR |
189 | . = ALIGN(PAGE_SIZE); \ |
190 | VMLINUX_SYMBOL(__nosave_end) = .; | |
191 | ||
192 | #define PAGE_ALIGNED_DATA(page_align) \ | |
193 | . = ALIGN(page_align); \ | |
75b13483 | 194 | *(.data..page_aligned) |
ef53dae8 SR |
195 | |
196 | #define READ_MOSTLY_DATA(align) \ | |
197 | . = ALIGN(align); \ | |
54cb27a7 | 198 | *(.data..read_mostly) |
ef53dae8 SR |
199 | |
200 | #define CACHELINE_ALIGNED_DATA(align) \ | |
201 | . = ALIGN(align); \ | |
4af57b78 | 202 | *(.data..cacheline_aligned) |
ef53dae8 | 203 | |
39a449d9 | 204 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 205 | . = ALIGN(align); \ |
2af7687f | 206 | *(.data..init_task) |
ef53dae8 SR |
207 | |
208 | /* | |
209 | * Read only Data | |
210 | */ | |
211 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 212 | . = ALIGN((align)); \ |
1da177e4 | 213 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 214 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
215 | *(.rodata) *(.rodata.*) \ |
216 | *(__vermagic) /* Kernel version magic */ \ | |
8256e47c | 217 | *(__markers_strings) /* Markers: strings */ \ |
97e1c18e | 218 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
219 | } \ |
220 | \ | |
221 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
222 | *(.rodata1) \ | |
223 | } \ | |
224 | \ | |
6360b1fb JB |
225 | BUG_TABLE \ |
226 | \ | |
1da177e4 LT |
227 | /* PCI quirks */ \ |
228 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
229 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
230 | *(.pci_fixup_early) \ | |
231 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
232 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
233 | *(.pci_fixup_header) \ | |
234 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
235 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
236 | *(.pci_fixup_final) \ | |
237 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
238 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
239 | *(.pci_fixup_enable) \ | |
240 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
241 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
242 | *(.pci_fixup_resume) \ | |
243 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
244 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
245 | *(.pci_fixup_resume_early) \ | |
246 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
247 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
248 | *(.pci_fixup_suspend) \ | |
249 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
1da177e4 LT |
250 | } \ |
251 | \ | |
5658c769 DW |
252 | /* Built-in firmware blobs */ \ |
253 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
254 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
255 | *(.builtin_fw) \ | |
256 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
257 | } \ | |
258 | \ | |
394b701c | 259 | /* RapidIO route ops */ \ |
e5cabeb3 | 260 | .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ |
058f88d6 AB |
261 | VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ |
262 | *(.rio_switch_ops) \ | |
263 | VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ | |
394b701c MP |
264 | } \ |
265 | \ | |
63687a52 JB |
266 | TRACEDATA \ |
267 | \ | |
1da177e4 LT |
268 | /* Kernel symbol table: Normal symbols */ \ |
269 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
270 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
271 | *(__ksymtab) \ | |
272 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ | |
273 | } \ | |
274 | \ | |
275 | /* Kernel symbol table: GPL-only symbols */ \ | |
276 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
277 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
278 | *(__ksymtab_gpl) \ | |
279 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ | |
280 | } \ | |
281 | \ | |
f71d20e9 AV |
282 | /* Kernel symbol table: Normal unused symbols */ \ |
283 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
284 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
285 | *(__ksymtab_unused) \ | |
286 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ | |
287 | } \ | |
288 | \ | |
289 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
290 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
291 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
292 | *(__ksymtab_unused_gpl) \ | |
293 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ | |
294 | } \ | |
295 | \ | |
9f28bb7e GKH |
296 | /* Kernel symbol table: GPL-future-only symbols */ \ |
297 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
298 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
299 | *(__ksymtab_gpl_future) \ | |
300 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ | |
301 | } \ | |
302 | \ | |
1da177e4 LT |
303 | /* Kernel symbol table: Normal symbols */ \ |
304 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
305 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
306 | *(__kcrctab) \ | |
307 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ | |
308 | } \ | |
309 | \ | |
310 | /* Kernel symbol table: GPL-only symbols */ \ | |
311 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
312 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
313 | *(__kcrctab_gpl) \ | |
314 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ | |
315 | } \ | |
316 | \ | |
f71d20e9 AV |
317 | /* Kernel symbol table: Normal unused symbols */ \ |
318 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
319 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
320 | *(__kcrctab_unused) \ | |
321 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ | |
322 | } \ | |
323 | \ | |
324 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
325 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
326 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
327 | *(__kcrctab_unused_gpl) \ | |
328 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ | |
329 | } \ | |
330 | \ | |
9f28bb7e GKH |
331 | /* Kernel symbol table: GPL-future-only symbols */ \ |
332 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
333 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
334 | *(__kcrctab_gpl_future) \ | |
335 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ | |
336 | } \ | |
337 | \ | |
1da177e4 LT |
338 | /* Kernel symbol table: strings */ \ |
339 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
340 | *(__ksymtab_strings) \ | |
341 | } \ | |
342 | \ | |
eb8f6890 SR |
343 | /* __*init sections */ \ |
344 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 345 | *(.ref.rodata) \ |
eb8f6890 SR |
346 | DEV_KEEP(init.rodata) \ |
347 | DEV_KEEP(exit.rodata) \ | |
348 | CPU_KEEP(init.rodata) \ | |
349 | CPU_KEEP(exit.rodata) \ | |
350 | MEM_KEEP(init.rodata) \ | |
351 | MEM_KEEP(exit.rodata) \ | |
352 | } \ | |
353 | \ | |
1da177e4 LT |
354 | /* Built-in module parameters. */ \ |
355 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
356 | VMLINUX_SYMBOL(__start___param) = .; \ | |
357 | *(__param) \ | |
358 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
edeed305 | 359 | . = ALIGN((align)); \ |
6569580d | 360 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 361 | } \ |
4096b46f SR |
362 | . = ALIGN((align)); |
363 | ||
ef53dae8 | 364 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 365 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
366 | #define RODATA RO_DATA_SECTION(4096) |
367 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
368 | |
369 | #define SECURITY_INIT \ | |
60bad7fa | 370 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
371 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
372 | *(.security_initcall.init) \ | |
373 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
374 | } | |
375 | ||
7664709b SR |
376 | /* .text section. Map to function alignment to avoid address changes |
377 | * during second ld run in second ld pass when generating System.map */ | |
378 | #define TEXT_TEXT \ | |
379 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 380 | *(.text.hot) \ |
0e0d314e | 381 | *(.text) \ |
312b1485 | 382 | *(.ref.text) \ |
eb8f6890 SR |
383 | DEV_KEEP(init.text) \ |
384 | DEV_KEEP(exit.text) \ | |
385 | CPU_KEEP(init.text) \ | |
386 | CPU_KEEP(exit.text) \ | |
387 | MEM_KEEP(init.text) \ | |
fb5e2b37 JB |
388 | MEM_KEEP(exit.text) \ |
389 | *(.text.unlikely) | |
eb8f6890 | 390 | |
7664709b | 391 | |
6d30e3a8 SR |
392 | /* sched.text is aling to function alignment to secure we have same |
393 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 394 | #define SCHED_TEXT \ |
6d30e3a8 | 395 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
396 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
397 | *(.sched.text) \ | |
398 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
399 | ||
6d30e3a8 SR |
400 | /* spinlock.text is aling to function alignment to secure we have same |
401 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 402 | #define LOCK_TEXT \ |
6d30e3a8 | 403 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
404 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
405 | *(.spinlock.text) \ | |
406 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
407 | |
408 | #define KPROBES_TEXT \ | |
409 | ALIGN_FUNCTION(); \ | |
410 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
411 | *(.kprobes.text) \ | |
412 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 413 | |
a0343e82 FW |
414 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
415 | #define IRQENTRY_TEXT \ | |
416 | ALIGN_FUNCTION(); \ | |
417 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
418 | *(.irqentry.text) \ | |
419 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
420 | #else | |
421 | #define IRQENTRY_TEXT | |
422 | #endif | |
423 | ||
37c514e3 | 424 | /* Section used for early init (in .S files) */ |
7923f90f | 425 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 426 | |
7923f90f | 427 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
428 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
429 | HEAD_TEXT \ | |
430 | } | |
431 | ||
432 | /* | |
433 | * Exception table | |
434 | */ | |
435 | #define EXCEPTION_TABLE(align) \ | |
436 | . = ALIGN(align); \ | |
437 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
438 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
439 | *(__ex_table) \ | |
440 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
441 | } | |
442 | ||
443 | /* | |
444 | * Init task | |
445 | */ | |
39a449d9 | 446 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 447 | . = ALIGN(align); \ |
da5e37ef | 448 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 449 | INIT_TASK_DATA(align) \ |
ef53dae8 | 450 | } |
37c514e3 | 451 | |
b99b87f7 | 452 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
453 | #define KERNEL_CTORS() . = ALIGN(8); \ |
454 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 PO |
455 | *(.ctors) \ |
456 | VMLINUX_SYMBOL(__ctors_end) = .; | |
457 | #else | |
458 | #define KERNEL_CTORS() | |
459 | #endif | |
460 | ||
01ba2bdc | 461 | /* init and exit section handling */ |
eb8f6890 SR |
462 | #define INIT_DATA \ |
463 | *(.init.data) \ | |
464 | DEV_DISCARD(init.data) \ | |
eb8f6890 | 465 | CPU_DISCARD(init.data) \ |
eb8f6890 | 466 | MEM_DISCARD(init.data) \ |
b99b87f7 | 467 | KERNEL_CTORS() \ |
fd6c3a8d | 468 | *(.init.rodata) \ |
4b3b4c5e | 469 | MCOUNT_REC() \ |
fd6c3a8d JB |
470 | DEV_DISCARD(init.rodata) \ |
471 | CPU_DISCARD(init.rodata) \ | |
e9d376f0 | 472 | MEM_DISCARD(init.rodata) |
eb8f6890 SR |
473 | |
474 | #define INIT_TEXT \ | |
475 | *(.init.text) \ | |
476 | DEV_DISCARD(init.text) \ | |
477 | CPU_DISCARD(init.text) \ | |
478 | MEM_DISCARD(init.text) | |
479 | ||
480 | #define EXIT_DATA \ | |
481 | *(.exit.data) \ | |
482 | DEV_DISCARD(exit.data) \ | |
483 | DEV_DISCARD(exit.rodata) \ | |
484 | CPU_DISCARD(exit.data) \ | |
485 | CPU_DISCARD(exit.rodata) \ | |
486 | MEM_DISCARD(exit.data) \ | |
487 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 488 | |
eb8f6890 SR |
489 | #define EXIT_TEXT \ |
490 | *(.exit.text) \ | |
491 | DEV_DISCARD(exit.text) \ | |
492 | CPU_DISCARD(exit.text) \ | |
493 | MEM_DISCARD(exit.text) | |
01ba2bdc | 494 | |
7923f90f SR |
495 | #define EXIT_CALL \ |
496 | *(.exitcall.exit) | |
497 | ||
ef53dae8 SR |
498 | /* |
499 | * bss (Block Started by Symbol) - uninitialized data | |
500 | * zeroed during startup | |
501 | */ | |
04e448d9 TA |
502 | #define SBSS(sbss_align) \ |
503 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
504 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
505 | *(.sbss) \ | |
506 | *(.scommon) \ | |
507 | } | |
508 | ||
509 | #define BSS(bss_align) \ | |
510 | . = ALIGN(bss_align); \ | |
511 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
7c74df07 | 512 | *(.bss..page_aligned) \ |
ef53dae8 SR |
513 | *(.dynbss) \ |
514 | *(.bss) \ | |
515 | *(COMMON) \ | |
ef53dae8 SR |
516 | } |
517 | ||
518 | /* | |
519 | * DWARF debug sections. | |
520 | * Symbols in the DWARF debugging sections are relative to | |
521 | * the beginning of the section so we begin them at 0. | |
522 | */ | |
a7d0c210 PBG |
523 | #define DWARF_DEBUG \ |
524 | /* DWARF 1 */ \ | |
525 | .debug 0 : { *(.debug) } \ | |
526 | .line 0 : { *(.line) } \ | |
527 | /* GNU DWARF 1 extensions */ \ | |
528 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
529 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
530 | /* DWARF 1.1 and DWARF 2 */ \ | |
531 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
532 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
533 | /* DWARF 2 */ \ | |
534 | .debug_info 0 : { *(.debug_info \ | |
535 | .gnu.linkonce.wi.*) } \ | |
536 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
537 | .debug_line 0 : { *(.debug_line) } \ | |
538 | .debug_frame 0 : { *(.debug_frame) } \ | |
539 | .debug_str 0 : { *(.debug_str) } \ | |
540 | .debug_loc 0 : { *(.debug_loc) } \ | |
541 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
542 | /* SGI/MIPS DWARF 2 extensions */ \ | |
543 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
544 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
545 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
546 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
547 | ||
548 | /* Stabs debugging sections. */ | |
549 | #define STABS_DEBUG \ | |
550 | .stab 0 : { *(.stab) } \ | |
551 | .stabstr 0 : { *(.stabstr) } \ | |
552 | .stab.excl 0 : { *(.stab.excl) } \ | |
553 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
554 | .stab.index 0 : { *(.stab.index) } \ | |
555 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
556 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 557 | |
6360b1fb | 558 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
559 | #define BUG_TABLE \ |
560 | . = ALIGN(8); \ | |
561 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 562 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 563 | *(__bug_table) \ |
c6de0026 | 564 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 565 | } |
6360b1fb JB |
566 | #else |
567 | #define BUG_TABLE | |
568 | #endif | |
7664c5a1 | 569 | |
63687a52 JB |
570 | #ifdef CONFIG_PM_TRACE |
571 | #define TRACEDATA \ | |
572 | . = ALIGN(4); \ | |
573 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 574 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 575 | *(.tracedata) \ |
c6de0026 | 576 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
577 | } |
578 | #else | |
579 | #define TRACEDATA | |
580 | #endif | |
581 | ||
9c9b8b38 | 582 | #define NOTES \ |
cbe87121 RM |
583 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
584 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
585 | *(.note.*) \ | |
586 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
587 | } | |
61ce1efe | 588 | |
ef53dae8 SR |
589 | #define INIT_SETUP(initsetup_align) \ |
590 | . = ALIGN(initsetup_align); \ | |
591 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
592 | *(.init.setup) \ | |
593 | VMLINUX_SYMBOL(__setup_end) = .; | |
594 | ||
61ce1efe | 595 | #define INITCALLS \ |
c2147a50 | 596 | *(.initcallearly.init) \ |
c6de0026 | 597 | VMLINUX_SYMBOL(__early_initcall_end) = .; \ |
b3438f82 LT |
598 | *(.initcall0.init) \ |
599 | *(.initcall0s.init) \ | |
61ce1efe | 600 | *(.initcall1.init) \ |
735a7ffb | 601 | *(.initcall1s.init) \ |
61ce1efe | 602 | *(.initcall2.init) \ |
735a7ffb | 603 | *(.initcall2s.init) \ |
61ce1efe | 604 | *(.initcall3.init) \ |
735a7ffb | 605 | *(.initcall3s.init) \ |
61ce1efe | 606 | *(.initcall4.init) \ |
735a7ffb | 607 | *(.initcall4s.init) \ |
61ce1efe | 608 | *(.initcall5.init) \ |
735a7ffb | 609 | *(.initcall5s.init) \ |
8d610dd5 | 610 | *(.initcallrootfs.init) \ |
61ce1efe | 611 | *(.initcall6.init) \ |
735a7ffb AM |
612 | *(.initcall6s.init) \ |
613 | *(.initcall7.init) \ | |
614 | *(.initcall7s.init) | |
61ce1efe | 615 | |
ef53dae8 SR |
616 | #define INIT_CALLS \ |
617 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
618 | INITCALLS \ | |
619 | VMLINUX_SYMBOL(__initcall_end) = .; | |
620 | ||
621 | #define CON_INITCALL \ | |
622 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
623 | *(.con_initcall.init) \ | |
624 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
625 | ||
626 | #define SECURITY_INITCALL \ | |
627 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
628 | *(.security_initcall.init) \ | |
629 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
630 | ||
631 | #ifdef CONFIG_BLK_DEV_INITRD | |
632 | #define INIT_RAM_FS \ | |
633 | . = ALIGN(PAGE_SIZE); \ | |
634 | VMLINUX_SYMBOL(__initramfs_start) = .; \ | |
635 | *(.init.ramfs) \ | |
ffe8018c HB |
636 | . = ALIGN(8); \ |
637 | *(.init.ramfs.info) | |
ef53dae8 | 638 | #else |
eadfe219 | 639 | #define INIT_RAM_FS |
ef53dae8 SR |
640 | #endif |
641 | ||
023bf6f1 TH |
642 | /* |
643 | * Default discarded sections. | |
644 | * | |
645 | * Some archs want to discard exit text/data at runtime rather than | |
646 | * link time due to cross-section references such as alt instructions, | |
647 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
648 | * section definitions so that such archs put those in earlier section | |
649 | * definitions. | |
650 | */ | |
405d967d TH |
651 | #define DISCARDS \ |
652 | /DISCARD/ : { \ | |
653 | EXIT_TEXT \ | |
654 | EXIT_DATA \ | |
023bf6f1 | 655 | EXIT_CALL \ |
405d967d TH |
656 | *(.discard) \ |
657 | } | |
658 | ||
3e5d8f97 | 659 | /** |
6b7c38d5 | 660 | * PERCPU_VADDR - define output section for percpu area |
3e5d8f97 TH |
661 | * @vaddr: explicit base address (optional) |
662 | * @phdr: destination PHDR (optional) | |
663 | * | |
664 | * Macro which expands to output section for percpu area. If @vaddr | |
665 | * is not blank, it specifies explicit base address and all percpu | |
666 | * symbols will be offset from the given address. If blank, @vaddr | |
667 | * always equals @laddr + LOAD_OFFSET. | |
668 | * | |
669 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
670 | * output PHDR is sticky. If @phdr is specified, the next output | |
671 | * section in the linker script will go there too. @phdr should have | |
672 | * a leading colon. | |
673 | * | |
3ac6cffe TH |
674 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
675 | * If there is no need to put the percpu section at a predetermined | |
676 | * address, use PERCPU(). | |
3e5d8f97 TH |
677 | */ |
678 | #define PERCPU_VADDR(vaddr, phdr) \ | |
dba3d36b | 679 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 680 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 TH |
681 | - LOAD_OFFSET) { \ |
682 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
3d9a854c DV |
683 | *(.data..percpu..first) \ |
684 | *(.data..percpu..page_aligned) \ | |
685 | *(.data..percpu) \ | |
686 | *(.data..percpu..shared_aligned) \ | |
6b7c38d5 TH |
687 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
688 | } phdr \ | |
3d9a854c | 689 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
690 | |
691 | /** | |
692 | * PERCPU - define output section for percpu area, simple version | |
693 | * @align: required alignment | |
694 | * | |
695 | * Align to @align and outputs output section for percpu area. This | |
696 | * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and | |
697 | * __per_cpu_start will be identical. | |
3ac6cffe TH |
698 | * |
699 | * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except | |
700 | * that __per_cpu_load is defined as a relative symbol against | |
3d9a854c | 701 | * .data..percpu which is required for relocatable x86_32 |
3ac6cffe | 702 | * configuration. |
3e5d8f97 | 703 | */ |
5fb7dc37 FY |
704 | #define PERCPU(align) \ |
705 | . = ALIGN(align); \ | |
3d9a854c | 706 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe TH |
707 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
708 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
3d9a854c DV |
709 | *(.data..percpu..first) \ |
710 | *(.data..percpu..page_aligned) \ | |
711 | *(.data..percpu) \ | |
712 | *(.data..percpu..shared_aligned) \ | |
3ac6cffe TH |
713 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
714 | } | |
ef53dae8 SR |
715 | |
716 | ||
717 | /* | |
718 | * Definition of the high level *_SECTION macros | |
719 | * They will fit only a subset of the architectures | |
720 | */ | |
721 | ||
722 | ||
723 | /* | |
724 | * Writeable data. | |
725 | * All sections are combined in a single .data section. | |
726 | * The sections following CONSTRUCTORS are arranged so their | |
727 | * typical alignment matches. | |
728 | * A cacheline is typical/always less than a PAGE_SIZE so | |
729 | * the sections that has this restriction (or similar) | |
730 | * is located before the ones requiring PAGE_SIZE alignment. | |
731 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
732 | * matches the requirment of PAGE_ALIGNED_DATA. | |
733 | * | |
7923f90f | 734 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 735 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
736 | . = ALIGN(PAGE_SIZE); \ |
737 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 738 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
739 | NOSAVE_DATA \ |
740 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
741 | CACHELINE_ALIGNED_DATA(cacheline) \ |
742 | READ_MOSTLY_DATA(cacheline) \ | |
743 | DATA_DATA \ | |
744 | CONSTRUCTORS \ | |
ef53dae8 SR |
745 | } |
746 | ||
747 | #define INIT_TEXT_SECTION(inittext_align) \ | |
748 | . = ALIGN(inittext_align); \ | |
749 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
750 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
751 | INIT_TEXT \ | |
752 | VMLINUX_SYMBOL(_einittext) = .; \ | |
753 | } | |
754 | ||
755 | #define INIT_DATA_SECTION(initsetup_align) \ | |
756 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
757 | INIT_DATA \ | |
758 | INIT_SETUP(initsetup_align) \ | |
759 | INIT_CALLS \ | |
760 | CON_INITCALL \ | |
761 | SECURITY_INITCALL \ | |
762 | INIT_RAM_FS \ | |
763 | } | |
764 | ||
04e448d9 TA |
765 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
766 | . = ALIGN(sbss_align); \ | |
767 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
768 | SBSS(sbss_align) \ | |
ef53dae8 | 769 | BSS(bss_align) \ |
04e448d9 TA |
770 | . = ALIGN(stop_align); \ |
771 | VMLINUX_SYMBOL(__bss_stop) = .; |