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(...) | |
0415b00d | 18 | * PERCPU_SECTION(CACHELINE_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) \ | |
7ccaba53 | 170 | *(.data.unlikely) \ |
65498646 | 171 | STRUCT_ALIGN(); \ |
97e1c18e | 172 | *(__tracepoints) \ |
e9d376f0 | 173 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
174 | . = ALIGN(8); \ |
175 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
176 | *(__jump_table) \ | |
177 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ | |
e9d376f0 JB |
178 | . = ALIGN(8); \ |
179 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
180 | *(__verbose) \ | |
181 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 182 | LIKELY_PROFILE() \ |
b77e38aa | 183 | BRANCH_PROFILE() \ |
3d56e331 | 184 | TRACE_PRINTKS() |
ca967258 | 185 | |
ef53dae8 SR |
186 | /* |
187 | * Data section helpers | |
188 | */ | |
189 | #define NOSAVE_DATA \ | |
190 | . = ALIGN(PAGE_SIZE); \ | |
191 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 192 | *(.data..nosave) \ |
ef53dae8 SR |
193 | . = ALIGN(PAGE_SIZE); \ |
194 | VMLINUX_SYMBOL(__nosave_end) = .; | |
195 | ||
196 | #define PAGE_ALIGNED_DATA(page_align) \ | |
197 | . = ALIGN(page_align); \ | |
75b13483 | 198 | *(.data..page_aligned) |
ef53dae8 SR |
199 | |
200 | #define READ_MOSTLY_DATA(align) \ | |
201 | . = ALIGN(align); \ | |
8369744f SL |
202 | *(.data..read_mostly) \ |
203 | . = ALIGN(align); | |
ef53dae8 SR |
204 | |
205 | #define CACHELINE_ALIGNED_DATA(align) \ | |
206 | . = ALIGN(align); \ | |
4af57b78 | 207 | *(.data..cacheline_aligned) |
ef53dae8 | 208 | |
39a449d9 | 209 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 210 | . = ALIGN(align); \ |
2af7687f | 211 | *(.data..init_task) |
ef53dae8 SR |
212 | |
213 | /* | |
214 | * Read only Data | |
215 | */ | |
216 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 217 | . = ALIGN((align)); \ |
1da177e4 | 218 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 219 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
220 | *(.rodata) *(.rodata.*) \ |
221 | *(__vermagic) /* Kernel version magic */ \ | |
65498646 MD |
222 | . = ALIGN(8); \ |
223 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
224 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ | |
225 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ | |
97e1c18e | 226 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
227 | } \ |
228 | \ | |
229 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
230 | *(.rodata1) \ | |
231 | } \ | |
232 | \ | |
6360b1fb JB |
233 | BUG_TABLE \ |
234 | \ | |
1da177e4 LT |
235 | /* PCI quirks */ \ |
236 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
237 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
238 | *(.pci_fixup_early) \ | |
239 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
240 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
241 | *(.pci_fixup_header) \ | |
242 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
243 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
244 | *(.pci_fixup_final) \ | |
245 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
246 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
247 | *(.pci_fixup_enable) \ | |
248 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
249 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
250 | *(.pci_fixup_resume) \ | |
251 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
252 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
253 | *(.pci_fixup_resume_early) \ | |
254 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
255 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
256 | *(.pci_fixup_suspend) \ | |
257 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
1da177e4 LT |
258 | } \ |
259 | \ | |
5658c769 DW |
260 | /* Built-in firmware blobs */ \ |
261 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
262 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
263 | *(.builtin_fw) \ | |
264 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
265 | } \ | |
266 | \ | |
394b701c | 267 | /* RapidIO route ops */ \ |
e5cabeb3 | 268 | .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ |
058f88d6 AB |
269 | VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ |
270 | *(.rio_switch_ops) \ | |
271 | VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ | |
394b701c MP |
272 | } \ |
273 | \ | |
63687a52 JB |
274 | TRACEDATA \ |
275 | \ | |
1da177e4 LT |
276 | /* Kernel symbol table: Normal symbols */ \ |
277 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
278 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
f02e8a65 | 279 | *(SORT(___ksymtab+*)) \ |
1da177e4 LT |
280 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
281 | } \ | |
282 | \ | |
283 | /* Kernel symbol table: GPL-only symbols */ \ | |
284 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
285 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
f02e8a65 | 286 | *(SORT(___ksymtab_gpl+*)) \ |
1da177e4 LT |
287 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
288 | } \ | |
289 | \ | |
f71d20e9 AV |
290 | /* Kernel symbol table: Normal unused symbols */ \ |
291 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
292 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
f02e8a65 | 293 | *(SORT(___ksymtab_unused+*)) \ |
f71d20e9 AV |
294 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
295 | } \ | |
296 | \ | |
297 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
298 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
299 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
f02e8a65 | 300 | *(SORT(___ksymtab_unused_gpl+*)) \ |
f71d20e9 AV |
301 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
302 | } \ | |
303 | \ | |
9f28bb7e GKH |
304 | /* Kernel symbol table: GPL-future-only symbols */ \ |
305 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
306 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
f02e8a65 | 307 | *(SORT(___ksymtab_gpl_future+*)) \ |
9f28bb7e GKH |
308 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
309 | } \ | |
310 | \ | |
1da177e4 LT |
311 | /* Kernel symbol table: Normal symbols */ \ |
312 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
313 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
f02e8a65 | 314 | *(SORT(___kcrctab+*)) \ |
1da177e4 LT |
315 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
316 | } \ | |
317 | \ | |
318 | /* Kernel symbol table: GPL-only symbols */ \ | |
319 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
320 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
f02e8a65 | 321 | *(SORT(___kcrctab_gpl+*)) \ |
1da177e4 LT |
322 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
323 | } \ | |
324 | \ | |
f71d20e9 AV |
325 | /* Kernel symbol table: Normal unused symbols */ \ |
326 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
327 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
f02e8a65 | 328 | *(SORT(___kcrctab_unused+*)) \ |
f71d20e9 AV |
329 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
330 | } \ | |
331 | \ | |
332 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
333 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
334 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
f02e8a65 | 335 | *(SORT(___kcrctab_unused_gpl+*)) \ |
f71d20e9 AV |
336 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
337 | } \ | |
338 | \ | |
9f28bb7e GKH |
339 | /* Kernel symbol table: GPL-future-only symbols */ \ |
340 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
341 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
f02e8a65 | 342 | *(SORT(___kcrctab_gpl_future+*)) \ |
9f28bb7e GKH |
343 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
344 | } \ | |
345 | \ | |
1da177e4 LT |
346 | /* Kernel symbol table: strings */ \ |
347 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
348 | *(__ksymtab_strings) \ | |
349 | } \ | |
350 | \ | |
eb8f6890 SR |
351 | /* __*init sections */ \ |
352 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 353 | *(.ref.rodata) \ |
eb8f6890 SR |
354 | DEV_KEEP(init.rodata) \ |
355 | DEV_KEEP(exit.rodata) \ | |
356 | CPU_KEEP(init.rodata) \ | |
357 | CPU_KEEP(exit.rodata) \ | |
358 | MEM_KEEP(init.rodata) \ | |
359 | MEM_KEEP(exit.rodata) \ | |
360 | } \ | |
361 | \ | |
1da177e4 LT |
362 | /* Built-in module parameters. */ \ |
363 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
364 | VMLINUX_SYMBOL(__start___param) = .; \ | |
365 | *(__param) \ | |
366 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
e94965ed DT |
367 | } \ |
368 | \ | |
369 | /* Built-in module versions. */ \ | |
370 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
371 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
372 | *(__modver) \ | |
373 | VMLINUX_SYMBOL(__stop___modver) = .; \ | |
edeed305 | 374 | . = ALIGN((align)); \ |
6569580d | 375 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 376 | } \ |
4096b46f SR |
377 | . = ALIGN((align)); |
378 | ||
ef53dae8 | 379 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 380 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
381 | #define RODATA RO_DATA_SECTION(4096) |
382 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
383 | |
384 | #define SECURITY_INIT \ | |
60bad7fa | 385 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
386 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
387 | *(.security_initcall.init) \ | |
388 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
389 | } | |
390 | ||
7664709b SR |
391 | /* .text section. Map to function alignment to avoid address changes |
392 | * during second ld run in second ld pass when generating System.map */ | |
393 | #define TEXT_TEXT \ | |
394 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 395 | *(.text.hot) \ |
0e0d314e | 396 | *(.text) \ |
312b1485 | 397 | *(.ref.text) \ |
eb8f6890 SR |
398 | DEV_KEEP(init.text) \ |
399 | DEV_KEEP(exit.text) \ | |
400 | CPU_KEEP(init.text) \ | |
401 | CPU_KEEP(exit.text) \ | |
402 | MEM_KEEP(init.text) \ | |
fb5e2b37 JB |
403 | MEM_KEEP(exit.text) \ |
404 | *(.text.unlikely) | |
eb8f6890 | 405 | |
7664709b | 406 | |
6d30e3a8 SR |
407 | /* sched.text is aling to function alignment to secure we have same |
408 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 409 | #define SCHED_TEXT \ |
6d30e3a8 | 410 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
411 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
412 | *(.sched.text) \ | |
413 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
414 | ||
6d30e3a8 SR |
415 | /* spinlock.text is aling to function alignment to secure we have same |
416 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 417 | #define LOCK_TEXT \ |
6d30e3a8 | 418 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
419 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
420 | *(.spinlock.text) \ | |
421 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
422 | |
423 | #define KPROBES_TEXT \ | |
424 | ALIGN_FUNCTION(); \ | |
425 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
426 | *(.kprobes.text) \ | |
427 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 428 | |
ea714547 JO |
429 | #define ENTRY_TEXT \ |
430 | ALIGN_FUNCTION(); \ | |
431 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
432 | *(.entry.text) \ | |
433 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
434 | ||
a0343e82 FW |
435 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
436 | #define IRQENTRY_TEXT \ | |
437 | ALIGN_FUNCTION(); \ | |
438 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
439 | *(.irqentry.text) \ | |
440 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
441 | #else | |
442 | #define IRQENTRY_TEXT | |
443 | #endif | |
444 | ||
37c514e3 | 445 | /* Section used for early init (in .S files) */ |
7923f90f | 446 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 447 | |
7923f90f | 448 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
449 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
450 | HEAD_TEXT \ | |
451 | } | |
452 | ||
453 | /* | |
454 | * Exception table | |
455 | */ | |
456 | #define EXCEPTION_TABLE(align) \ | |
457 | . = ALIGN(align); \ | |
458 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
459 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
460 | *(__ex_table) \ | |
461 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
462 | } | |
463 | ||
464 | /* | |
465 | * Init task | |
466 | */ | |
39a449d9 | 467 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 468 | . = ALIGN(align); \ |
da5e37ef | 469 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 470 | INIT_TASK_DATA(align) \ |
ef53dae8 | 471 | } |
37c514e3 | 472 | |
b99b87f7 | 473 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
474 | #define KERNEL_CTORS() . = ALIGN(8); \ |
475 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 PO |
476 | *(.ctors) \ |
477 | VMLINUX_SYMBOL(__ctors_end) = .; | |
478 | #else | |
479 | #define KERNEL_CTORS() | |
480 | #endif | |
481 | ||
01ba2bdc | 482 | /* init and exit section handling */ |
eb8f6890 SR |
483 | #define INIT_DATA \ |
484 | *(.init.data) \ | |
485 | DEV_DISCARD(init.data) \ | |
eb8f6890 | 486 | CPU_DISCARD(init.data) \ |
eb8f6890 | 487 | MEM_DISCARD(init.data) \ |
b99b87f7 | 488 | KERNEL_CTORS() \ |
fd6c3a8d | 489 | *(.init.rodata) \ |
4b3b4c5e | 490 | MCOUNT_REC() \ |
e4a9ea5e | 491 | FTRACE_EVENTS() \ |
3d56e331 | 492 | TRACE_SYSCALLS() \ |
fd6c3a8d JB |
493 | DEV_DISCARD(init.rodata) \ |
494 | CPU_DISCARD(init.rodata) \ | |
aab94339 DB |
495 | MEM_DISCARD(init.rodata) \ |
496 | KERNEL_DTB() | |
eb8f6890 SR |
497 | |
498 | #define INIT_TEXT \ | |
499 | *(.init.text) \ | |
500 | DEV_DISCARD(init.text) \ | |
501 | CPU_DISCARD(init.text) \ | |
502 | MEM_DISCARD(init.text) | |
503 | ||
504 | #define EXIT_DATA \ | |
505 | *(.exit.data) \ | |
506 | DEV_DISCARD(exit.data) \ | |
507 | DEV_DISCARD(exit.rodata) \ | |
508 | CPU_DISCARD(exit.data) \ | |
509 | CPU_DISCARD(exit.rodata) \ | |
510 | MEM_DISCARD(exit.data) \ | |
511 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 512 | |
eb8f6890 SR |
513 | #define EXIT_TEXT \ |
514 | *(.exit.text) \ | |
515 | DEV_DISCARD(exit.text) \ | |
516 | CPU_DISCARD(exit.text) \ | |
517 | MEM_DISCARD(exit.text) | |
01ba2bdc | 518 | |
7923f90f SR |
519 | #define EXIT_CALL \ |
520 | *(.exitcall.exit) | |
521 | ||
ef53dae8 SR |
522 | /* |
523 | * bss (Block Started by Symbol) - uninitialized data | |
524 | * zeroed during startup | |
525 | */ | |
04e448d9 TA |
526 | #define SBSS(sbss_align) \ |
527 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
528 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
529 | *(.sbss) \ | |
530 | *(.scommon) \ | |
531 | } | |
532 | ||
533 | #define BSS(bss_align) \ | |
534 | . = ALIGN(bss_align); \ | |
535 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
7c74df07 | 536 | *(.bss..page_aligned) \ |
ef53dae8 SR |
537 | *(.dynbss) \ |
538 | *(.bss) \ | |
539 | *(COMMON) \ | |
ef53dae8 SR |
540 | } |
541 | ||
542 | /* | |
543 | * DWARF debug sections. | |
544 | * Symbols in the DWARF debugging sections are relative to | |
545 | * the beginning of the section so we begin them at 0. | |
546 | */ | |
a7d0c210 PBG |
547 | #define DWARF_DEBUG \ |
548 | /* DWARF 1 */ \ | |
549 | .debug 0 : { *(.debug) } \ | |
550 | .line 0 : { *(.line) } \ | |
551 | /* GNU DWARF 1 extensions */ \ | |
552 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
553 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
554 | /* DWARF 1.1 and DWARF 2 */ \ | |
555 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
556 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
557 | /* DWARF 2 */ \ | |
558 | .debug_info 0 : { *(.debug_info \ | |
559 | .gnu.linkonce.wi.*) } \ | |
560 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
561 | .debug_line 0 : { *(.debug_line) } \ | |
562 | .debug_frame 0 : { *(.debug_frame) } \ | |
563 | .debug_str 0 : { *(.debug_str) } \ | |
564 | .debug_loc 0 : { *(.debug_loc) } \ | |
565 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
566 | /* SGI/MIPS DWARF 2 extensions */ \ | |
567 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
568 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
569 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
570 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
571 | ||
572 | /* Stabs debugging sections. */ | |
573 | #define STABS_DEBUG \ | |
574 | .stab 0 : { *(.stab) } \ | |
575 | .stabstr 0 : { *(.stabstr) } \ | |
576 | .stab.excl 0 : { *(.stab.excl) } \ | |
577 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
578 | .stab.index 0 : { *(.stab.index) } \ | |
579 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
580 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 581 | |
6360b1fb | 582 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
583 | #define BUG_TABLE \ |
584 | . = ALIGN(8); \ | |
585 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 586 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 587 | *(__bug_table) \ |
c6de0026 | 588 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 589 | } |
6360b1fb JB |
590 | #else |
591 | #define BUG_TABLE | |
592 | #endif | |
7664c5a1 | 593 | |
63687a52 JB |
594 | #ifdef CONFIG_PM_TRACE |
595 | #define TRACEDATA \ | |
596 | . = ALIGN(4); \ | |
597 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 598 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 599 | *(.tracedata) \ |
c6de0026 | 600 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
601 | } |
602 | #else | |
603 | #define TRACEDATA | |
604 | #endif | |
605 | ||
9c9b8b38 | 606 | #define NOTES \ |
cbe87121 RM |
607 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
608 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
609 | *(.note.*) \ | |
610 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
611 | } | |
61ce1efe | 612 | |
ef53dae8 SR |
613 | #define INIT_SETUP(initsetup_align) \ |
614 | . = ALIGN(initsetup_align); \ | |
615 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
616 | *(.init.setup) \ | |
617 | VMLINUX_SYMBOL(__setup_end) = .; | |
618 | ||
026cee00 PM |
619 | #define INIT_CALLS_LEVEL(level) \ |
620 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
621 | *(.initcall##level##.init) \ | |
622 | *(.initcall##level##s.init) \ | |
61ce1efe | 623 | |
ef53dae8 SR |
624 | #define INIT_CALLS \ |
625 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
026cee00 PM |
626 | *(.initcallearly.init) \ |
627 | INIT_CALLS_LEVEL(0) \ | |
628 | INIT_CALLS_LEVEL(1) \ | |
629 | INIT_CALLS_LEVEL(2) \ | |
630 | INIT_CALLS_LEVEL(3) \ | |
631 | INIT_CALLS_LEVEL(4) \ | |
632 | INIT_CALLS_LEVEL(5) \ | |
633 | INIT_CALLS_LEVEL(rootfs) \ | |
634 | INIT_CALLS_LEVEL(6) \ | |
635 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
636 | VMLINUX_SYMBOL(__initcall_end) = .; |
637 | ||
638 | #define CON_INITCALL \ | |
639 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
640 | *(.con_initcall.init) \ | |
641 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
642 | ||
643 | #define SECURITY_INITCALL \ | |
644 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
645 | *(.security_initcall.init) \ | |
646 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
647 | ||
648 | #ifdef CONFIG_BLK_DEV_INITRD | |
649 | #define INIT_RAM_FS \ | |
d8826262 | 650 | . = ALIGN(4); \ |
ef53dae8 SR |
651 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
652 | *(.init.ramfs) \ | |
ffe8018c HB |
653 | . = ALIGN(8); \ |
654 | *(.init.ramfs.info) | |
ef53dae8 | 655 | #else |
eadfe219 | 656 | #define INIT_RAM_FS |
ef53dae8 SR |
657 | #endif |
658 | ||
023bf6f1 TH |
659 | /* |
660 | * Default discarded sections. | |
661 | * | |
662 | * Some archs want to discard exit text/data at runtime rather than | |
663 | * link time due to cross-section references such as alt instructions, | |
664 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
665 | * section definitions so that such archs put those in earlier section | |
666 | * definitions. | |
667 | */ | |
405d967d TH |
668 | #define DISCARDS \ |
669 | /DISCARD/ : { \ | |
670 | EXIT_TEXT \ | |
671 | EXIT_DATA \ | |
023bf6f1 | 672 | EXIT_CALL \ |
405d967d | 673 | *(.discard) \ |
c7f52cdc | 674 | *(.discard.*) \ |
405d967d TH |
675 | } |
676 | ||
6ea0c34d MF |
677 | /** |
678 | * PERCPU_INPUT - the percpu input sections | |
679 | * @cacheline: cacheline size | |
680 | * | |
681 | * The core percpu section names and core symbols which do not rely | |
682 | * directly upon load addresses. | |
683 | * | |
684 | * @cacheline is used to align subsections to avoid false cacheline | |
685 | * sharing between subsections for different purposes. | |
686 | */ | |
687 | #define PERCPU_INPUT(cacheline) \ | |
688 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
689 | *(.data..percpu..first) \ | |
690 | . = ALIGN(PAGE_SIZE); \ | |
691 | *(.data..percpu..page_aligned) \ | |
692 | . = ALIGN(cacheline); \ | |
693 | *(.data..percpu..readmostly) \ | |
694 | . = ALIGN(cacheline); \ | |
695 | *(.data..percpu) \ | |
696 | *(.data..percpu..shared_aligned) \ | |
697 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
698 | ||
3e5d8f97 | 699 | /** |
6b7c38d5 | 700 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 701 | * @cacheline: cacheline size |
3e5d8f97 TH |
702 | * @vaddr: explicit base address (optional) |
703 | * @phdr: destination PHDR (optional) | |
704 | * | |
19df0c2f TH |
705 | * Macro which expands to output section for percpu area. |
706 | * | |
707 | * @cacheline is used to align subsections to avoid false cacheline | |
708 | * sharing between subsections for different purposes. | |
709 | * | |
710 | * If @vaddr is not blank, it specifies explicit base address and all | |
711 | * percpu symbols will be offset from the given address. If blank, | |
712 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
713 | * |
714 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
715 | * output PHDR is sticky. If @phdr is specified, the next output | |
716 | * section in the linker script will go there too. @phdr should have | |
717 | * a leading colon. | |
718 | * | |
3ac6cffe TH |
719 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
720 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 721 | * address, use PERCPU_SECTION. |
3e5d8f97 | 722 | */ |
19df0c2f | 723 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 724 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 725 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 726 | - LOAD_OFFSET) { \ |
6ea0c34d | 727 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 728 | } phdr \ |
3d9a854c | 729 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
730 | |
731 | /** | |
0415b00d | 732 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 733 | * @cacheline: cacheline size |
3e5d8f97 | 734 | * |
0415b00d TH |
735 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
736 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 737 | * __per_cpu_start will be identical. |
3ac6cffe | 738 | * |
0415b00d | 739 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
740 | * except that __per_cpu_load is defined as a relative symbol against |
741 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 742 | */ |
0415b00d TH |
743 | #define PERCPU_SECTION(cacheline) \ |
744 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 745 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 746 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 747 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 748 | } |
ef53dae8 SR |
749 | |
750 | ||
751 | /* | |
752 | * Definition of the high level *_SECTION macros | |
753 | * They will fit only a subset of the architectures | |
754 | */ | |
755 | ||
756 | ||
757 | /* | |
758 | * Writeable data. | |
759 | * All sections are combined in a single .data section. | |
760 | * The sections following CONSTRUCTORS are arranged so their | |
761 | * typical alignment matches. | |
762 | * A cacheline is typical/always less than a PAGE_SIZE so | |
763 | * the sections that has this restriction (or similar) | |
764 | * is located before the ones requiring PAGE_SIZE alignment. | |
765 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 766 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 767 | * |
7923f90f | 768 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 769 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
770 | . = ALIGN(PAGE_SIZE); \ |
771 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 772 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
773 | NOSAVE_DATA \ |
774 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
775 | CACHELINE_ALIGNED_DATA(cacheline) \ |
776 | READ_MOSTLY_DATA(cacheline) \ | |
777 | DATA_DATA \ | |
778 | CONSTRUCTORS \ | |
ef53dae8 SR |
779 | } |
780 | ||
781 | #define INIT_TEXT_SECTION(inittext_align) \ | |
782 | . = ALIGN(inittext_align); \ | |
783 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
784 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
785 | INIT_TEXT \ | |
786 | VMLINUX_SYMBOL(_einittext) = .; \ | |
787 | } | |
788 | ||
789 | #define INIT_DATA_SECTION(initsetup_align) \ | |
790 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
791 | INIT_DATA \ | |
792 | INIT_SETUP(initsetup_align) \ | |
793 | INIT_CALLS \ | |
794 | CON_INITCALL \ | |
795 | SECURITY_INITCALL \ | |
796 | INIT_RAM_FS \ | |
797 | } | |
798 | ||
04e448d9 TA |
799 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
800 | . = ALIGN(sbss_align); \ | |
801 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
802 | SBSS(sbss_align) \ | |
ef53dae8 | 803 | BSS(bss_align) \ |
04e448d9 TA |
804 | . = ALIGN(stop_align); \ |
805 | VMLINUX_SYMBOL(__bss_stop) = .; |