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(...) | |
19df0c2f | 18 | * PERCPU(CACHELINE_SIZE, PAGE_SIZE) |
ef53dae8 SR |
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 | */ | |
aab94339 DB |
70 | #define STRUCT_ALIGNMENT 32 |
71 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 72 | |
eb8f6890 SR |
73 | /* The actual configuration determine if the init/exit sections |
74 | * are handled as text/data or they can be discarded (which | |
75 | * often happens at runtime) | |
76 | */ | |
77 | #ifdef CONFIG_HOTPLUG | |
78 | #define DEV_KEEP(sec) *(.dev##sec) | |
79 | #define DEV_DISCARD(sec) | |
80 | #else | |
81 | #define DEV_KEEP(sec) | |
82 | #define DEV_DISCARD(sec) *(.dev##sec) | |
83 | #endif | |
84 | ||
85 | #ifdef CONFIG_HOTPLUG_CPU | |
86 | #define CPU_KEEP(sec) *(.cpu##sec) | |
87 | #define CPU_DISCARD(sec) | |
88 | #else | |
89 | #define CPU_KEEP(sec) | |
90 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
91 | #endif | |
92 | ||
1a3fb6d4 | 93 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
94 | #define MEM_KEEP(sec) *(.mem##sec) |
95 | #define MEM_DISCARD(sec) | |
96 | #else | |
97 | #define MEM_KEEP(sec) | |
98 | #define MEM_DISCARD(sec) *(.mem##sec) | |
99 | #endif | |
100 | ||
8da3821b | 101 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
102 | #define MCOUNT_REC() . = ALIGN(8); \ |
103 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
104 | *(__mcount_loc) \ |
105 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
106 | #else | |
107 | #define MCOUNT_REC() | |
108 | #endif | |
eb8f6890 | 109 | |
2ed84eeb | 110 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
111 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
112 | *(_ftrace_annotated_branch) \ | |
113 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
114 | #else |
115 | #define LIKELY_PROFILE() | |
116 | #endif | |
117 | ||
2bcd521a SR |
118 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
119 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
120 | *(_ftrace_branch) \ | |
121 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
122 | #else | |
123 | #define BRANCH_PROFILE() | |
124 | #endif | |
125 | ||
5f77a88b | 126 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
127 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
128 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
b77e38aa SR |
129 | *(_ftrace_events) \ |
130 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
131 | #else | |
132 | #define FTRACE_EVENTS() | |
133 | #endif | |
134 | ||
1ba28e02 LJ |
135 | #ifdef CONFIG_TRACING |
136 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
137 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
138 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
139 | #else | |
140 | #define TRACE_PRINTKS() | |
141 | #endif | |
142 | ||
bed1ffca | 143 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
144 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
145 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
bed1ffca FW |
146 | *(__syscalls_metadata) \ |
147 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
148 | #else | |
149 | #define TRACE_SYSCALLS() | |
150 | #endif | |
151 | ||
aab94339 DB |
152 | |
153 | #define KERNEL_DTB() \ | |
154 | STRUCT_ALIGN(); \ | |
155 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
156 | *(.dtb.init.rodata) \ | |
157 | VMLINUX_SYMBOL(__dtb_end) = .; | |
158 | ||
ca967258 SR |
159 | /* .data section */ |
160 | #define DATA_DATA \ | |
0e0d314e | 161 | *(.data) \ |
312b1485 | 162 | *(.ref.data) \ |
d356c0b6 | 163 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
164 | DEV_KEEP(init.data) \ |
165 | DEV_KEEP(exit.data) \ | |
166 | CPU_KEEP(init.data) \ | |
167 | CPU_KEEP(exit.data) \ | |
168 | MEM_KEEP(init.data) \ | |
169 | MEM_KEEP(exit.data) \ | |
65498646 | 170 | STRUCT_ALIGN(); \ |
97e1c18e | 171 | *(__tracepoints) \ |
e9d376f0 JB |
172 | /* implement dynamic printk debug */ \ |
173 | . = ALIGN(8); \ | |
174 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
175 | *(__verbose) \ | |
176 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 177 | LIKELY_PROFILE() \ |
b77e38aa | 178 | BRANCH_PROFILE() \ |
3d56e331 | 179 | TRACE_PRINTKS() |
ca967258 | 180 | |
ef53dae8 SR |
181 | /* |
182 | * Data section helpers | |
183 | */ | |
184 | #define NOSAVE_DATA \ | |
185 | . = ALIGN(PAGE_SIZE); \ | |
186 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 187 | *(.data..nosave) \ |
ef53dae8 SR |
188 | . = ALIGN(PAGE_SIZE); \ |
189 | VMLINUX_SYMBOL(__nosave_end) = .; | |
190 | ||
191 | #define PAGE_ALIGNED_DATA(page_align) \ | |
192 | . = ALIGN(page_align); \ | |
75b13483 | 193 | *(.data..page_aligned) |
ef53dae8 SR |
194 | |
195 | #define READ_MOSTLY_DATA(align) \ | |
196 | . = ALIGN(align); \ | |
8369744f SL |
197 | *(.data..read_mostly) \ |
198 | . = ALIGN(align); | |
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 */ \ | |
65498646 MD |
217 | . = ALIGN(8); \ |
218 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
219 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ | |
220 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ | |
8256e47c | 221 | *(__markers_strings) /* Markers: strings */ \ |
97e1c18e | 222 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
223 | } \ |
224 | \ | |
225 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
226 | *(.rodata1) \ | |
227 | } \ | |
228 | \ | |
6360b1fb JB |
229 | BUG_TABLE \ |
230 | \ | |
bf5438fc JB |
231 | JUMP_TABLE \ |
232 | \ | |
1da177e4 LT |
233 | /* PCI quirks */ \ |
234 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
235 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
236 | *(.pci_fixup_early) \ | |
237 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
238 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
239 | *(.pci_fixup_header) \ | |
240 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
241 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
242 | *(.pci_fixup_final) \ | |
243 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
244 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
245 | *(.pci_fixup_enable) \ | |
246 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
247 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
248 | *(.pci_fixup_resume) \ | |
249 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
250 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
251 | *(.pci_fixup_resume_early) \ | |
252 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
253 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
254 | *(.pci_fixup_suspend) \ | |
255 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
1da177e4 LT |
256 | } \ |
257 | \ | |
5658c769 DW |
258 | /* Built-in firmware blobs */ \ |
259 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
260 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
261 | *(.builtin_fw) \ | |
262 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
263 | } \ | |
264 | \ | |
394b701c | 265 | /* RapidIO route ops */ \ |
e5cabeb3 | 266 | .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ |
058f88d6 AB |
267 | VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ |
268 | *(.rio_switch_ops) \ | |
269 | VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ | |
394b701c MP |
270 | } \ |
271 | \ | |
63687a52 JB |
272 | TRACEDATA \ |
273 | \ | |
1da177e4 LT |
274 | /* Kernel symbol table: Normal symbols */ \ |
275 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
276 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
277 | *(__ksymtab) \ | |
278 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ | |
279 | } \ | |
280 | \ | |
281 | /* Kernel symbol table: GPL-only symbols */ \ | |
282 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
283 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
284 | *(__ksymtab_gpl) \ | |
285 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ | |
286 | } \ | |
287 | \ | |
f71d20e9 AV |
288 | /* Kernel symbol table: Normal unused symbols */ \ |
289 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
290 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
291 | *(__ksymtab_unused) \ | |
292 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ | |
293 | } \ | |
294 | \ | |
295 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
296 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
297 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
298 | *(__ksymtab_unused_gpl) \ | |
299 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ | |
300 | } \ | |
301 | \ | |
9f28bb7e GKH |
302 | /* Kernel symbol table: GPL-future-only symbols */ \ |
303 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
304 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
305 | *(__ksymtab_gpl_future) \ | |
306 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ | |
307 | } \ | |
308 | \ | |
1da177e4 LT |
309 | /* Kernel symbol table: Normal symbols */ \ |
310 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
311 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
312 | *(__kcrctab) \ | |
313 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ | |
314 | } \ | |
315 | \ | |
316 | /* Kernel symbol table: GPL-only symbols */ \ | |
317 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
318 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
319 | *(__kcrctab_gpl) \ | |
320 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ | |
321 | } \ | |
322 | \ | |
f71d20e9 AV |
323 | /* Kernel symbol table: Normal unused symbols */ \ |
324 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
325 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
326 | *(__kcrctab_unused) \ | |
327 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ | |
328 | } \ | |
329 | \ | |
330 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
331 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
332 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
333 | *(__kcrctab_unused_gpl) \ | |
334 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ | |
335 | } \ | |
336 | \ | |
9f28bb7e GKH |
337 | /* Kernel symbol table: GPL-future-only symbols */ \ |
338 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
339 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
340 | *(__kcrctab_gpl_future) \ | |
341 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ | |
342 | } \ | |
343 | \ | |
1da177e4 LT |
344 | /* Kernel symbol table: strings */ \ |
345 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
346 | *(__ksymtab_strings) \ | |
347 | } \ | |
348 | \ | |
eb8f6890 SR |
349 | /* __*init sections */ \ |
350 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 351 | *(.ref.rodata) \ |
eb8f6890 SR |
352 | DEV_KEEP(init.rodata) \ |
353 | DEV_KEEP(exit.rodata) \ | |
354 | CPU_KEEP(init.rodata) \ | |
355 | CPU_KEEP(exit.rodata) \ | |
356 | MEM_KEEP(init.rodata) \ | |
357 | MEM_KEEP(exit.rodata) \ | |
358 | } \ | |
359 | \ | |
1da177e4 LT |
360 | /* Built-in module parameters. */ \ |
361 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
362 | VMLINUX_SYMBOL(__start___param) = .; \ | |
363 | *(__param) \ | |
364 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
e94965ed DT |
365 | } \ |
366 | \ | |
367 | /* Built-in module versions. */ \ | |
368 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
369 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
370 | *(__modver) \ | |
371 | VMLINUX_SYMBOL(__stop___modver) = .; \ | |
edeed305 | 372 | . = ALIGN((align)); \ |
6569580d | 373 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 374 | } \ |
4096b46f SR |
375 | . = ALIGN((align)); |
376 | ||
ef53dae8 | 377 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 378 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
379 | #define RODATA RO_DATA_SECTION(4096) |
380 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
381 | |
382 | #define SECURITY_INIT \ | |
60bad7fa | 383 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
384 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
385 | *(.security_initcall.init) \ | |
386 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
387 | } | |
388 | ||
7664709b SR |
389 | /* .text section. Map to function alignment to avoid address changes |
390 | * during second ld run in second ld pass when generating System.map */ | |
391 | #define TEXT_TEXT \ | |
392 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 393 | *(.text.hot) \ |
0e0d314e | 394 | *(.text) \ |
312b1485 | 395 | *(.ref.text) \ |
eb8f6890 SR |
396 | DEV_KEEP(init.text) \ |
397 | DEV_KEEP(exit.text) \ | |
398 | CPU_KEEP(init.text) \ | |
399 | CPU_KEEP(exit.text) \ | |
400 | MEM_KEEP(init.text) \ | |
fb5e2b37 JB |
401 | MEM_KEEP(exit.text) \ |
402 | *(.text.unlikely) | |
eb8f6890 | 403 | |
7664709b | 404 | |
6d30e3a8 SR |
405 | /* sched.text is aling to function alignment to secure we have same |
406 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 407 | #define SCHED_TEXT \ |
6d30e3a8 | 408 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
409 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
410 | *(.sched.text) \ | |
411 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
412 | ||
6d30e3a8 SR |
413 | /* spinlock.text is aling to function alignment to secure we have same |
414 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 415 | #define LOCK_TEXT \ |
6d30e3a8 | 416 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
417 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
418 | *(.spinlock.text) \ | |
419 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
420 | |
421 | #define KPROBES_TEXT \ | |
422 | ALIGN_FUNCTION(); \ | |
423 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
424 | *(.kprobes.text) \ | |
425 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 426 | |
ea714547 JO |
427 | #define ENTRY_TEXT \ |
428 | ALIGN_FUNCTION(); \ | |
429 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
430 | *(.entry.text) \ | |
431 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
432 | ||
a0343e82 FW |
433 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
434 | #define IRQENTRY_TEXT \ | |
435 | ALIGN_FUNCTION(); \ | |
436 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
437 | *(.irqentry.text) \ | |
438 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
439 | #else | |
440 | #define IRQENTRY_TEXT | |
441 | #endif | |
442 | ||
37c514e3 | 443 | /* Section used for early init (in .S files) */ |
7923f90f | 444 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 445 | |
7923f90f | 446 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
447 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
448 | HEAD_TEXT \ | |
449 | } | |
450 | ||
451 | /* | |
452 | * Exception table | |
453 | */ | |
454 | #define EXCEPTION_TABLE(align) \ | |
455 | . = ALIGN(align); \ | |
456 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
457 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
458 | *(__ex_table) \ | |
459 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
460 | } | |
461 | ||
462 | /* | |
463 | * Init task | |
464 | */ | |
39a449d9 | 465 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 466 | . = ALIGN(align); \ |
da5e37ef | 467 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 468 | INIT_TASK_DATA(align) \ |
ef53dae8 | 469 | } |
37c514e3 | 470 | |
b99b87f7 | 471 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
472 | #define KERNEL_CTORS() . = ALIGN(8); \ |
473 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 PO |
474 | *(.ctors) \ |
475 | VMLINUX_SYMBOL(__ctors_end) = .; | |
476 | #else | |
477 | #define KERNEL_CTORS() | |
478 | #endif | |
479 | ||
01ba2bdc | 480 | /* init and exit section handling */ |
eb8f6890 SR |
481 | #define INIT_DATA \ |
482 | *(.init.data) \ | |
483 | DEV_DISCARD(init.data) \ | |
eb8f6890 | 484 | CPU_DISCARD(init.data) \ |
eb8f6890 | 485 | MEM_DISCARD(init.data) \ |
b99b87f7 | 486 | KERNEL_CTORS() \ |
fd6c3a8d | 487 | *(.init.rodata) \ |
4b3b4c5e | 488 | MCOUNT_REC() \ |
e4a9ea5e | 489 | FTRACE_EVENTS() \ |
3d56e331 | 490 | TRACE_SYSCALLS() \ |
fd6c3a8d JB |
491 | DEV_DISCARD(init.rodata) \ |
492 | CPU_DISCARD(init.rodata) \ | |
aab94339 DB |
493 | MEM_DISCARD(init.rodata) \ |
494 | KERNEL_DTB() | |
eb8f6890 SR |
495 | |
496 | #define INIT_TEXT \ | |
497 | *(.init.text) \ | |
498 | DEV_DISCARD(init.text) \ | |
499 | CPU_DISCARD(init.text) \ | |
500 | MEM_DISCARD(init.text) | |
501 | ||
502 | #define EXIT_DATA \ | |
503 | *(.exit.data) \ | |
504 | DEV_DISCARD(exit.data) \ | |
505 | DEV_DISCARD(exit.rodata) \ | |
506 | CPU_DISCARD(exit.data) \ | |
507 | CPU_DISCARD(exit.rodata) \ | |
508 | MEM_DISCARD(exit.data) \ | |
509 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 510 | |
eb8f6890 SR |
511 | #define EXIT_TEXT \ |
512 | *(.exit.text) \ | |
513 | DEV_DISCARD(exit.text) \ | |
514 | CPU_DISCARD(exit.text) \ | |
515 | MEM_DISCARD(exit.text) | |
01ba2bdc | 516 | |
7923f90f SR |
517 | #define EXIT_CALL \ |
518 | *(.exitcall.exit) | |
519 | ||
ef53dae8 SR |
520 | /* |
521 | * bss (Block Started by Symbol) - uninitialized data | |
522 | * zeroed during startup | |
523 | */ | |
04e448d9 TA |
524 | #define SBSS(sbss_align) \ |
525 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
526 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
527 | *(.sbss) \ | |
528 | *(.scommon) \ | |
529 | } | |
530 | ||
531 | #define BSS(bss_align) \ | |
532 | . = ALIGN(bss_align); \ | |
533 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
7c74df07 | 534 | *(.bss..page_aligned) \ |
ef53dae8 SR |
535 | *(.dynbss) \ |
536 | *(.bss) \ | |
537 | *(COMMON) \ | |
ef53dae8 SR |
538 | } |
539 | ||
540 | /* | |
541 | * DWARF debug sections. | |
542 | * Symbols in the DWARF debugging sections are relative to | |
543 | * the beginning of the section so we begin them at 0. | |
544 | */ | |
a7d0c210 PBG |
545 | #define DWARF_DEBUG \ |
546 | /* DWARF 1 */ \ | |
547 | .debug 0 : { *(.debug) } \ | |
548 | .line 0 : { *(.line) } \ | |
549 | /* GNU DWARF 1 extensions */ \ | |
550 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
551 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
552 | /* DWARF 1.1 and DWARF 2 */ \ | |
553 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
554 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
555 | /* DWARF 2 */ \ | |
556 | .debug_info 0 : { *(.debug_info \ | |
557 | .gnu.linkonce.wi.*) } \ | |
558 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
559 | .debug_line 0 : { *(.debug_line) } \ | |
560 | .debug_frame 0 : { *(.debug_frame) } \ | |
561 | .debug_str 0 : { *(.debug_str) } \ | |
562 | .debug_loc 0 : { *(.debug_loc) } \ | |
563 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
564 | /* SGI/MIPS DWARF 2 extensions */ \ | |
565 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
566 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
567 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
568 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
569 | ||
570 | /* Stabs debugging sections. */ | |
571 | #define STABS_DEBUG \ | |
572 | .stab 0 : { *(.stab) } \ | |
573 | .stabstr 0 : { *(.stabstr) } \ | |
574 | .stab.excl 0 : { *(.stab.excl) } \ | |
575 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
576 | .stab.index 0 : { *(.stab.index) } \ | |
577 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
578 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 579 | |
6360b1fb | 580 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
581 | #define BUG_TABLE \ |
582 | . = ALIGN(8); \ | |
583 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 584 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 585 | *(__bug_table) \ |
c6de0026 | 586 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 587 | } |
6360b1fb JB |
588 | #else |
589 | #define BUG_TABLE | |
590 | #endif | |
7664c5a1 | 591 | |
bf5438fc JB |
592 | #define JUMP_TABLE \ |
593 | . = ALIGN(8); \ | |
594 | __jump_table : AT(ADDR(__jump_table) - LOAD_OFFSET) { \ | |
595 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
596 | *(__jump_table) \ | |
597 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ | |
598 | } | |
599 | ||
63687a52 JB |
600 | #ifdef CONFIG_PM_TRACE |
601 | #define TRACEDATA \ | |
602 | . = ALIGN(4); \ | |
603 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 604 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 605 | *(.tracedata) \ |
c6de0026 | 606 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
607 | } |
608 | #else | |
609 | #define TRACEDATA | |
610 | #endif | |
611 | ||
9c9b8b38 | 612 | #define NOTES \ |
cbe87121 RM |
613 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
614 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
615 | *(.note.*) \ | |
616 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
617 | } | |
61ce1efe | 618 | |
ef53dae8 SR |
619 | #define INIT_SETUP(initsetup_align) \ |
620 | . = ALIGN(initsetup_align); \ | |
621 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
622 | *(.init.setup) \ | |
623 | VMLINUX_SYMBOL(__setup_end) = .; | |
624 | ||
61ce1efe | 625 | #define INITCALLS \ |
c2147a50 | 626 | *(.initcallearly.init) \ |
c6de0026 | 627 | VMLINUX_SYMBOL(__early_initcall_end) = .; \ |
b3438f82 LT |
628 | *(.initcall0.init) \ |
629 | *(.initcall0s.init) \ | |
61ce1efe | 630 | *(.initcall1.init) \ |
735a7ffb | 631 | *(.initcall1s.init) \ |
61ce1efe | 632 | *(.initcall2.init) \ |
735a7ffb | 633 | *(.initcall2s.init) \ |
61ce1efe | 634 | *(.initcall3.init) \ |
735a7ffb | 635 | *(.initcall3s.init) \ |
61ce1efe | 636 | *(.initcall4.init) \ |
735a7ffb | 637 | *(.initcall4s.init) \ |
61ce1efe | 638 | *(.initcall5.init) \ |
735a7ffb | 639 | *(.initcall5s.init) \ |
8d610dd5 | 640 | *(.initcallrootfs.init) \ |
61ce1efe | 641 | *(.initcall6.init) \ |
735a7ffb AM |
642 | *(.initcall6s.init) \ |
643 | *(.initcall7.init) \ | |
644 | *(.initcall7s.init) | |
61ce1efe | 645 | |
ef53dae8 SR |
646 | #define INIT_CALLS \ |
647 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
648 | INITCALLS \ | |
649 | VMLINUX_SYMBOL(__initcall_end) = .; | |
650 | ||
651 | #define CON_INITCALL \ | |
652 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
653 | *(.con_initcall.init) \ | |
654 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
655 | ||
656 | #define SECURITY_INITCALL \ | |
657 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
658 | *(.security_initcall.init) \ | |
659 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
660 | ||
661 | #ifdef CONFIG_BLK_DEV_INITRD | |
662 | #define INIT_RAM_FS \ | |
d8826262 | 663 | . = ALIGN(4); \ |
ef53dae8 SR |
664 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
665 | *(.init.ramfs) \ | |
ffe8018c HB |
666 | . = ALIGN(8); \ |
667 | *(.init.ramfs.info) | |
ef53dae8 | 668 | #else |
eadfe219 | 669 | #define INIT_RAM_FS |
ef53dae8 SR |
670 | #endif |
671 | ||
023bf6f1 TH |
672 | /* |
673 | * Default discarded sections. | |
674 | * | |
675 | * Some archs want to discard exit text/data at runtime rather than | |
676 | * link time due to cross-section references such as alt instructions, | |
677 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
678 | * section definitions so that such archs put those in earlier section | |
679 | * definitions. | |
680 | */ | |
405d967d TH |
681 | #define DISCARDS \ |
682 | /DISCARD/ : { \ | |
683 | EXIT_TEXT \ | |
684 | EXIT_DATA \ | |
023bf6f1 | 685 | EXIT_CALL \ |
405d967d | 686 | *(.discard) \ |
c7f52cdc | 687 | *(.discard.*) \ |
405d967d TH |
688 | } |
689 | ||
3e5d8f97 | 690 | /** |
6b7c38d5 | 691 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 692 | * @cacheline: cacheline size |
3e5d8f97 TH |
693 | * @vaddr: explicit base address (optional) |
694 | * @phdr: destination PHDR (optional) | |
695 | * | |
19df0c2f TH |
696 | * Macro which expands to output section for percpu area. |
697 | * | |
698 | * @cacheline is used to align subsections to avoid false cacheline | |
699 | * sharing between subsections for different purposes. | |
700 | * | |
701 | * If @vaddr is not blank, it specifies explicit base address and all | |
702 | * percpu symbols will be offset from the given address. If blank, | |
703 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
704 | * |
705 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
706 | * output PHDR is sticky. If @phdr is specified, the next output | |
707 | * section in the linker script will go there too. @phdr should have | |
708 | * a leading colon. | |
709 | * | |
3ac6cffe TH |
710 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
711 | * If there is no need to put the percpu section at a predetermined | |
712 | * address, use PERCPU(). | |
3e5d8f97 | 713 | */ |
19df0c2f | 714 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 715 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 716 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 TH |
717 | - LOAD_OFFSET) { \ |
718 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
3d9a854c | 719 | *(.data..percpu..first) \ |
c957ef2c | 720 | . = ALIGN(PAGE_SIZE); \ |
3d9a854c | 721 | *(.data..percpu..page_aligned) \ |
19df0c2f | 722 | . = ALIGN(cacheline); \ |
c957ef2c | 723 | *(.data..percpu..readmostly) \ |
19df0c2f | 724 | . = ALIGN(cacheline); \ |
3d9a854c DV |
725 | *(.data..percpu) \ |
726 | *(.data..percpu..shared_aligned) \ | |
6b7c38d5 TH |
727 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
728 | } phdr \ | |
3d9a854c | 729 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
730 | |
731 | /** | |
732 | * PERCPU - define output section for percpu area, simple version | |
19df0c2f | 733 | * @cacheline: cacheline size |
3e5d8f97 TH |
734 | * @align: required alignment |
735 | * | |
19df0c2f TH |
736 | * Align to @align and outputs output section for percpu area. This macro |
737 | * doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 738 | * __per_cpu_start will be identical. |
3ac6cffe | 739 | * |
19df0c2f TH |
740 | * This macro is equivalent to ALIGN(@align); PERCPU_VADDR(@cacheline,,) |
741 | * except that __per_cpu_load is defined as a relative symbol against | |
742 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 743 | */ |
19df0c2f | 744 | #define PERCPU(cacheline, align) \ |
5fb7dc37 | 745 | . = ALIGN(align); \ |
3d9a854c | 746 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe TH |
747 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
748 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
3d9a854c | 749 | *(.data..percpu..first) \ |
c957ef2c | 750 | . = ALIGN(PAGE_SIZE); \ |
3d9a854c | 751 | *(.data..percpu..page_aligned) \ |
19df0c2f | 752 | . = ALIGN(cacheline); \ |
2aeb66d3 | 753 | *(.data..percpu..readmostly) \ |
19df0c2f | 754 | . = ALIGN(cacheline); \ |
3d9a854c DV |
755 | *(.data..percpu) \ |
756 | *(.data..percpu..shared_aligned) \ | |
3ac6cffe TH |
757 | VMLINUX_SYMBOL(__per_cpu_end) = .; \ |
758 | } | |
ef53dae8 SR |
759 | |
760 | ||
761 | /* | |
762 | * Definition of the high level *_SECTION macros | |
763 | * They will fit only a subset of the architectures | |
764 | */ | |
765 | ||
766 | ||
767 | /* | |
768 | * Writeable data. | |
769 | * All sections are combined in a single .data section. | |
770 | * The sections following CONSTRUCTORS are arranged so their | |
771 | * typical alignment matches. | |
772 | * A cacheline is typical/always less than a PAGE_SIZE so | |
773 | * the sections that has this restriction (or similar) | |
774 | * is located before the ones requiring PAGE_SIZE alignment. | |
775 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
776 | * matches the requirment of PAGE_ALIGNED_DATA. | |
777 | * | |
7923f90f | 778 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 779 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
780 | . = ALIGN(PAGE_SIZE); \ |
781 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 782 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
783 | NOSAVE_DATA \ |
784 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
785 | CACHELINE_ALIGNED_DATA(cacheline) \ |
786 | READ_MOSTLY_DATA(cacheline) \ | |
787 | DATA_DATA \ | |
788 | CONSTRUCTORS \ | |
ef53dae8 SR |
789 | } |
790 | ||
791 | #define INIT_TEXT_SECTION(inittext_align) \ | |
792 | . = ALIGN(inittext_align); \ | |
793 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
794 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
795 | INIT_TEXT \ | |
796 | VMLINUX_SYMBOL(_einittext) = .; \ | |
797 | } | |
798 | ||
799 | #define INIT_DATA_SECTION(initsetup_align) \ | |
800 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
801 | INIT_DATA \ | |
802 | INIT_SETUP(initsetup_align) \ | |
803 | INIT_CALLS \ | |
804 | CON_INITCALL \ | |
805 | SECURITY_INITCALL \ | |
806 | INIT_RAM_FS \ | |
807 | } | |
808 | ||
04e448d9 TA |
809 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
810 | . = ALIGN(sbss_align); \ | |
811 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
812 | SBSS(sbss_align) \ | |
ef53dae8 | 813 | BSS(bss_align) \ |
04e448d9 TA |
814 | . = ALIGN(stop_align); \ |
815 | VMLINUX_SYMBOL(__bss_stop) = .; |