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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(...) | |
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 | ||
b92021b0 | 55 | #include <linux/export.h> |
1da177e4 | 56 | |
6d30e3a8 SR |
57 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
58 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
59 | ||
07fca0e5 SR |
60 | /* |
61 | * Align to a 32 byte boundary equal to the | |
62 | * alignment gcc 4.5 uses for a struct | |
63 | */ | |
aab94339 DB |
64 | #define STRUCT_ALIGNMENT 32 |
65 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 66 | |
eb8f6890 SR |
67 | /* The actual configuration determine if the init/exit sections |
68 | * are handled as text/data or they can be discarded (which | |
69 | * often happens at runtime) | |
70 | */ | |
eb8f6890 SR |
71 | #ifdef CONFIG_HOTPLUG_CPU |
72 | #define CPU_KEEP(sec) *(.cpu##sec) | |
73 | #define CPU_DISCARD(sec) | |
74 | #else | |
75 | #define CPU_KEEP(sec) | |
76 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
77 | #endif | |
78 | ||
1a3fb6d4 | 79 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
80 | #define MEM_KEEP(sec) *(.mem##sec) |
81 | #define MEM_DISCARD(sec) | |
82 | #else | |
83 | #define MEM_KEEP(sec) | |
84 | #define MEM_DISCARD(sec) *(.mem##sec) | |
85 | #endif | |
86 | ||
8da3821b | 87 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
88 | #define MCOUNT_REC() . = ALIGN(8); \ |
89 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
90 | *(__mcount_loc) \ |
91 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
92 | #else | |
93 | #define MCOUNT_REC() | |
94 | #endif | |
eb8f6890 | 95 | |
2ed84eeb | 96 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
97 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
98 | *(_ftrace_annotated_branch) \ | |
99 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
100 | #else |
101 | #define LIKELY_PROFILE() | |
102 | #endif | |
103 | ||
2bcd521a SR |
104 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
105 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
106 | *(_ftrace_branch) \ | |
107 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
108 | #else | |
109 | #define BRANCH_PROFILE() | |
110 | #endif | |
111 | ||
376e2424 | 112 | #ifdef CONFIG_KPROBES |
69902c71 VG |
113 | #define KPROBE_BLACKLIST() . = ALIGN(8); \ |
114 | VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \ | |
376e2424 MH |
115 | *(_kprobe_blacklist) \ |
116 | VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .; | |
117 | #else | |
118 | #define KPROBE_BLACKLIST() | |
119 | #endif | |
120 | ||
5f77a88b | 121 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
122 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
123 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
b77e38aa SR |
124 | *(_ftrace_events) \ |
125 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
126 | #else | |
127 | #define FTRACE_EVENTS() | |
128 | #endif | |
129 | ||
1ba28e02 LJ |
130 | #ifdef CONFIG_TRACING |
131 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
132 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
133 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
102c9323 SRRH |
134 | #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ |
135 | *(__tracepoint_str) /* Trace_printk fmt' pointer */ \ | |
136 | VMLINUX_SYMBOL(__stop___tracepoint_str) = .; | |
1ba28e02 LJ |
137 | #else |
138 | #define TRACE_PRINTKS() | |
102c9323 | 139 | #define TRACEPOINT_STR() |
1ba28e02 LJ |
140 | #endif |
141 | ||
bed1ffca | 142 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
143 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
144 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
bed1ffca FW |
145 | *(__syscalls_metadata) \ |
146 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
147 | #else | |
148 | #define TRACE_SYSCALLS() | |
149 | #endif | |
150 | ||
aab94339 | 151 | |
06309288 RH |
152 | #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) |
153 | #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) | |
154 | #define OF_TABLE(cfg, name) __OF_TABLE(config_enabled(cfg), name) | |
155 | #define _OF_TABLE_0(name) | |
156 | #define _OF_TABLE_1(name) \ | |
f6e916b8 | 157 | . = ALIGN(8); \ |
06309288 RH |
158 | VMLINUX_SYMBOL(__##name##_of_table) = .; \ |
159 | *(__##name##_of_table) \ | |
160 | *(__##name##_of_table_end) | |
161 | ||
162 | #define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc) | |
163 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) | |
164 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
165 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) | |
166 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
b0b6abd3 | 167 | #define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon) |
6c3ff8b1 | 168 | |
aab94339 DB |
169 | #define KERNEL_DTB() \ |
170 | STRUCT_ALIGN(); \ | |
171 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
172 | *(.dtb.init.rodata) \ | |
173 | VMLINUX_SYMBOL(__dtb_end) = .; | |
174 | ||
ca967258 SR |
175 | /* .data section */ |
176 | #define DATA_DATA \ | |
0e0d314e | 177 | *(.data) \ |
312b1485 | 178 | *(.ref.data) \ |
d356c0b6 | 179 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
180 | MEM_KEEP(init.data) \ |
181 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 182 | *(.data.unlikely) \ |
65498646 | 183 | STRUCT_ALIGN(); \ |
97e1c18e | 184 | *(__tracepoints) \ |
e9d376f0 | 185 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
186 | . = ALIGN(8); \ |
187 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
188 | *(__jump_table) \ | |
189 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ | |
e9d376f0 JB |
190 | . = ALIGN(8); \ |
191 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
192 | *(__verbose) \ | |
193 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 194 | LIKELY_PROFILE() \ |
b77e38aa | 195 | BRANCH_PROFILE() \ |
102c9323 SRRH |
196 | TRACE_PRINTKS() \ |
197 | TRACEPOINT_STR() | |
ca967258 | 198 | |
ef53dae8 SR |
199 | /* |
200 | * Data section helpers | |
201 | */ | |
202 | #define NOSAVE_DATA \ | |
203 | . = ALIGN(PAGE_SIZE); \ | |
204 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 205 | *(.data..nosave) \ |
ef53dae8 SR |
206 | . = ALIGN(PAGE_SIZE); \ |
207 | VMLINUX_SYMBOL(__nosave_end) = .; | |
208 | ||
209 | #define PAGE_ALIGNED_DATA(page_align) \ | |
210 | . = ALIGN(page_align); \ | |
75b13483 | 211 | *(.data..page_aligned) |
ef53dae8 SR |
212 | |
213 | #define READ_MOSTLY_DATA(align) \ | |
214 | . = ALIGN(align); \ | |
8369744f SL |
215 | *(.data..read_mostly) \ |
216 | . = ALIGN(align); | |
ef53dae8 SR |
217 | |
218 | #define CACHELINE_ALIGNED_DATA(align) \ | |
219 | . = ALIGN(align); \ | |
4af57b78 | 220 | *(.data..cacheline_aligned) |
ef53dae8 | 221 | |
39a449d9 | 222 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 223 | . = ALIGN(align); \ |
2af7687f | 224 | *(.data..init_task) |
ef53dae8 SR |
225 | |
226 | /* | |
227 | * Read only Data | |
228 | */ | |
229 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 230 | . = ALIGN((align)); \ |
1da177e4 | 231 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 232 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
233 | *(.rodata) *(.rodata.*) \ |
234 | *(__vermagic) /* Kernel version magic */ \ | |
65498646 MD |
235 | . = ALIGN(8); \ |
236 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
237 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ | |
238 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ | |
97e1c18e | 239 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
240 | } \ |
241 | \ | |
242 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
243 | *(.rodata1) \ | |
244 | } \ | |
245 | \ | |
6360b1fb JB |
246 | BUG_TABLE \ |
247 | \ | |
1da177e4 LT |
248 | /* PCI quirks */ \ |
249 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
250 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
251 | *(.pci_fixup_early) \ | |
252 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
253 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
254 | *(.pci_fixup_header) \ | |
255 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
256 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
257 | *(.pci_fixup_final) \ | |
258 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
259 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
260 | *(.pci_fixup_enable) \ | |
261 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
262 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
263 | *(.pci_fixup_resume) \ | |
264 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
265 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
266 | *(.pci_fixup_resume_early) \ | |
267 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
268 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
269 | *(.pci_fixup_suspend) \ | |
270 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
7d2a01b8 AN |
271 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
272 | *(.pci_fixup_suspend_late) \ | |
273 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ | |
1da177e4 LT |
274 | } \ |
275 | \ | |
5658c769 DW |
276 | /* Built-in firmware blobs */ \ |
277 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
278 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
279 | *(.builtin_fw) \ | |
280 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
281 | } \ | |
282 | \ | |
63687a52 JB |
283 | TRACEDATA \ |
284 | \ | |
1da177e4 LT |
285 | /* Kernel symbol table: Normal symbols */ \ |
286 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
287 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
f02e8a65 | 288 | *(SORT(___ksymtab+*)) \ |
1da177e4 LT |
289 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
290 | } \ | |
291 | \ | |
292 | /* Kernel symbol table: GPL-only symbols */ \ | |
293 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
294 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
f02e8a65 | 295 | *(SORT(___ksymtab_gpl+*)) \ |
1da177e4 LT |
296 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
297 | } \ | |
298 | \ | |
f71d20e9 AV |
299 | /* Kernel symbol table: Normal unused symbols */ \ |
300 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
301 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
f02e8a65 | 302 | *(SORT(___ksymtab_unused+*)) \ |
f71d20e9 AV |
303 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
304 | } \ | |
305 | \ | |
306 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
307 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
308 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
f02e8a65 | 309 | *(SORT(___ksymtab_unused_gpl+*)) \ |
f71d20e9 AV |
310 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
311 | } \ | |
312 | \ | |
9f28bb7e GKH |
313 | /* Kernel symbol table: GPL-future-only symbols */ \ |
314 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
315 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
f02e8a65 | 316 | *(SORT(___ksymtab_gpl_future+*)) \ |
9f28bb7e GKH |
317 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
318 | } \ | |
319 | \ | |
1da177e4 LT |
320 | /* Kernel symbol table: Normal symbols */ \ |
321 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
322 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
f02e8a65 | 323 | *(SORT(___kcrctab+*)) \ |
1da177e4 LT |
324 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
325 | } \ | |
326 | \ | |
327 | /* Kernel symbol table: GPL-only symbols */ \ | |
328 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
329 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
f02e8a65 | 330 | *(SORT(___kcrctab_gpl+*)) \ |
1da177e4 LT |
331 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
332 | } \ | |
333 | \ | |
f71d20e9 AV |
334 | /* Kernel symbol table: Normal unused symbols */ \ |
335 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
336 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
f02e8a65 | 337 | *(SORT(___kcrctab_unused+*)) \ |
f71d20e9 AV |
338 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
339 | } \ | |
340 | \ | |
341 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
342 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
343 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
f02e8a65 | 344 | *(SORT(___kcrctab_unused_gpl+*)) \ |
f71d20e9 AV |
345 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
346 | } \ | |
347 | \ | |
9f28bb7e GKH |
348 | /* Kernel symbol table: GPL-future-only symbols */ \ |
349 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
350 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
f02e8a65 | 351 | *(SORT(___kcrctab_gpl_future+*)) \ |
9f28bb7e GKH |
352 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
353 | } \ | |
354 | \ | |
1da177e4 LT |
355 | /* Kernel symbol table: strings */ \ |
356 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
357 | *(__ksymtab_strings) \ | |
358 | } \ | |
359 | \ | |
eb8f6890 SR |
360 | /* __*init sections */ \ |
361 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 362 | *(.ref.rodata) \ |
eb8f6890 SR |
363 | MEM_KEEP(init.rodata) \ |
364 | MEM_KEEP(exit.rodata) \ | |
365 | } \ | |
366 | \ | |
1da177e4 LT |
367 | /* Built-in module parameters. */ \ |
368 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
369 | VMLINUX_SYMBOL(__start___param) = .; \ | |
370 | *(__param) \ | |
371 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
e94965ed DT |
372 | } \ |
373 | \ | |
374 | /* Built-in module versions. */ \ | |
375 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
376 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
377 | *(__modver) \ | |
378 | VMLINUX_SYMBOL(__stop___modver) = .; \ | |
edeed305 | 379 | . = ALIGN((align)); \ |
6569580d | 380 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 381 | } \ |
4096b46f SR |
382 | . = ALIGN((align)); |
383 | ||
ef53dae8 | 384 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 385 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
386 | #define RODATA RO_DATA_SECTION(4096) |
387 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
388 | |
389 | #define SECURITY_INIT \ | |
60bad7fa | 390 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
391 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
392 | *(.security_initcall.init) \ | |
393 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
394 | } | |
395 | ||
7664709b SR |
396 | /* .text section. Map to function alignment to avoid address changes |
397 | * during second ld run in second ld pass when generating System.map */ | |
398 | #define TEXT_TEXT \ | |
399 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 400 | *(.text.hot) \ |
0e0d314e | 401 | *(.text) \ |
312b1485 | 402 | *(.ref.text) \ |
eb8f6890 | 403 | MEM_KEEP(init.text) \ |
fb5e2b37 JB |
404 | MEM_KEEP(exit.text) \ |
405 | *(.text.unlikely) | |
eb8f6890 | 406 | |
7664709b | 407 | |
6d30e3a8 SR |
408 | /* sched.text is aling to function alignment to secure we have same |
409 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 410 | #define SCHED_TEXT \ |
6d30e3a8 | 411 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
412 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
413 | *(.sched.text) \ | |
414 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
415 | ||
6d30e3a8 SR |
416 | /* spinlock.text is aling to function alignment to secure we have same |
417 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 418 | #define LOCK_TEXT \ |
6d30e3a8 | 419 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
420 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
421 | *(.spinlock.text) \ | |
422 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
423 | |
424 | #define KPROBES_TEXT \ | |
425 | ALIGN_FUNCTION(); \ | |
426 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
427 | *(.kprobes.text) \ | |
428 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 429 | |
ea714547 JO |
430 | #define ENTRY_TEXT \ |
431 | ALIGN_FUNCTION(); \ | |
432 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
433 | *(.entry.text) \ | |
434 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
435 | ||
a0343e82 FW |
436 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
437 | #define IRQENTRY_TEXT \ | |
438 | ALIGN_FUNCTION(); \ | |
439 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
440 | *(.irqentry.text) \ | |
441 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
442 | #else | |
443 | #define IRQENTRY_TEXT | |
444 | #endif | |
445 | ||
37c514e3 | 446 | /* Section used for early init (in .S files) */ |
7923f90f | 447 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 448 | |
7923f90f | 449 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
450 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
451 | HEAD_TEXT \ | |
452 | } | |
453 | ||
454 | /* | |
455 | * Exception table | |
456 | */ | |
457 | #define EXCEPTION_TABLE(align) \ | |
458 | . = ALIGN(align); \ | |
459 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
460 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
461 | *(__ex_table) \ | |
462 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
463 | } | |
464 | ||
465 | /* | |
466 | * Init task | |
467 | */ | |
39a449d9 | 468 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 469 | . = ALIGN(align); \ |
da5e37ef | 470 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 471 | INIT_TASK_DATA(align) \ |
ef53dae8 | 472 | } |
37c514e3 | 473 | |
b99b87f7 | 474 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
475 | #define KERNEL_CTORS() . = ALIGN(8); \ |
476 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 | 477 | *(.ctors) \ |
eb3057df | 478 | *(.init_array) \ |
b99b87f7 PO |
479 | VMLINUX_SYMBOL(__ctors_end) = .; |
480 | #else | |
481 | #define KERNEL_CTORS() | |
482 | #endif | |
483 | ||
01ba2bdc | 484 | /* init and exit section handling */ |
eb8f6890 SR |
485 | #define INIT_DATA \ |
486 | *(.init.data) \ | |
eb8f6890 | 487 | MEM_DISCARD(init.data) \ |
b99b87f7 | 488 | KERNEL_CTORS() \ |
4b3b4c5e | 489 | MCOUNT_REC() \ |
9fd49328 | 490 | *(.init.rodata) \ |
e4a9ea5e | 491 | FTRACE_EVENTS() \ |
3d56e331 | 492 | TRACE_SYSCALLS() \ |
376e2424 | 493 | KPROBE_BLACKLIST() \ |
aab94339 | 494 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 495 | CLK_OF_TABLES() \ |
f618c470 | 496 | RESERVEDMEM_OF_TABLES() \ |
ae278a93 | 497 | CLKSRC_OF_TABLES() \ |
6c3ff8b1 | 498 | CPU_METHOD_OF_TABLES() \ |
f6e916b8 | 499 | KERNEL_DTB() \ |
b0b6abd3 RH |
500 | IRQCHIP_OF_MATCH_TABLE() \ |
501 | EARLYCON_OF_TABLES() | |
eb8f6890 SR |
502 | |
503 | #define INIT_TEXT \ | |
504 | *(.init.text) \ | |
eb8f6890 SR |
505 | MEM_DISCARD(init.text) |
506 | ||
507 | #define EXIT_DATA \ | |
508 | *(.exit.data) \ | |
eb8f6890 SR |
509 | MEM_DISCARD(exit.data) \ |
510 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 511 | |
eb8f6890 SR |
512 | #define EXIT_TEXT \ |
513 | *(.exit.text) \ | |
eb8f6890 | 514 | MEM_DISCARD(exit.text) |
01ba2bdc | 515 | |
7923f90f SR |
516 | #define EXIT_CALL \ |
517 | *(.exitcall.exit) | |
518 | ||
ef53dae8 SR |
519 | /* |
520 | * bss (Block Started by Symbol) - uninitialized data | |
521 | * zeroed during startup | |
522 | */ | |
04e448d9 TA |
523 | #define SBSS(sbss_align) \ |
524 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
525 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
526 | *(.sbss) \ | |
527 | *(.scommon) \ | |
528 | } | |
529 | ||
c87728ca DD |
530 | /* |
531 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
532 | * sections to the front of bss. | |
533 | */ | |
534 | #ifndef BSS_FIRST_SECTIONS | |
535 | #define BSS_FIRST_SECTIONS | |
536 | #endif | |
537 | ||
ef53dae8 SR |
538 | #define BSS(bss_align) \ |
539 | . = ALIGN(bss_align); \ | |
540 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 541 | BSS_FIRST_SECTIONS \ |
7c74df07 | 542 | *(.bss..page_aligned) \ |
ef53dae8 SR |
543 | *(.dynbss) \ |
544 | *(.bss) \ | |
545 | *(COMMON) \ | |
ef53dae8 SR |
546 | } |
547 | ||
548 | /* | |
549 | * DWARF debug sections. | |
550 | * Symbols in the DWARF debugging sections are relative to | |
551 | * the beginning of the section so we begin them at 0. | |
552 | */ | |
a7d0c210 PBG |
553 | #define DWARF_DEBUG \ |
554 | /* DWARF 1 */ \ | |
555 | .debug 0 : { *(.debug) } \ | |
556 | .line 0 : { *(.line) } \ | |
557 | /* GNU DWARF 1 extensions */ \ | |
558 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
559 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
560 | /* DWARF 1.1 and DWARF 2 */ \ | |
561 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
562 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
563 | /* DWARF 2 */ \ | |
564 | .debug_info 0 : { *(.debug_info \ | |
565 | .gnu.linkonce.wi.*) } \ | |
566 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
567 | .debug_line 0 : { *(.debug_line) } \ | |
568 | .debug_frame 0 : { *(.debug_frame) } \ | |
569 | .debug_str 0 : { *(.debug_str) } \ | |
570 | .debug_loc 0 : { *(.debug_loc) } \ | |
571 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
572 | /* SGI/MIPS DWARF 2 extensions */ \ | |
573 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
574 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
575 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
576 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
577 | ||
578 | /* Stabs debugging sections. */ | |
579 | #define STABS_DEBUG \ | |
580 | .stab 0 : { *(.stab) } \ | |
581 | .stabstr 0 : { *(.stabstr) } \ | |
582 | .stab.excl 0 : { *(.stab.excl) } \ | |
583 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
584 | .stab.index 0 : { *(.stab.index) } \ | |
585 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
586 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 587 | |
6360b1fb | 588 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
589 | #define BUG_TABLE \ |
590 | . = ALIGN(8); \ | |
591 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 592 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 593 | *(__bug_table) \ |
c6de0026 | 594 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 595 | } |
6360b1fb JB |
596 | #else |
597 | #define BUG_TABLE | |
598 | #endif | |
7664c5a1 | 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 | ||
026cee00 PM |
625 | #define INIT_CALLS_LEVEL(level) \ |
626 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
627 | *(.initcall##level##.init) \ | |
628 | *(.initcall##level##s.init) \ | |
61ce1efe | 629 | |
ef53dae8 SR |
630 | #define INIT_CALLS \ |
631 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
026cee00 PM |
632 | *(.initcallearly.init) \ |
633 | INIT_CALLS_LEVEL(0) \ | |
634 | INIT_CALLS_LEVEL(1) \ | |
635 | INIT_CALLS_LEVEL(2) \ | |
636 | INIT_CALLS_LEVEL(3) \ | |
637 | INIT_CALLS_LEVEL(4) \ | |
638 | INIT_CALLS_LEVEL(5) \ | |
639 | INIT_CALLS_LEVEL(rootfs) \ | |
640 | INIT_CALLS_LEVEL(6) \ | |
641 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
642 | VMLINUX_SYMBOL(__initcall_end) = .; |
643 | ||
644 | #define CON_INITCALL \ | |
645 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
646 | *(.con_initcall.init) \ | |
647 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
648 | ||
649 | #define SECURITY_INITCALL \ | |
650 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
651 | *(.security_initcall.init) \ | |
652 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
653 | ||
654 | #ifdef CONFIG_BLK_DEV_INITRD | |
655 | #define INIT_RAM_FS \ | |
d8826262 | 656 | . = ALIGN(4); \ |
ef53dae8 SR |
657 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
658 | *(.init.ramfs) \ | |
ffe8018c HB |
659 | . = ALIGN(8); \ |
660 | *(.init.ramfs.info) | |
ef53dae8 | 661 | #else |
eadfe219 | 662 | #define INIT_RAM_FS |
ef53dae8 SR |
663 | #endif |
664 | ||
023bf6f1 TH |
665 | /* |
666 | * Default discarded sections. | |
667 | * | |
668 | * Some archs want to discard exit text/data at runtime rather than | |
669 | * link time due to cross-section references such as alt instructions, | |
670 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
671 | * section definitions so that such archs put those in earlier section | |
672 | * definitions. | |
673 | */ | |
405d967d TH |
674 | #define DISCARDS \ |
675 | /DISCARD/ : { \ | |
676 | EXIT_TEXT \ | |
677 | EXIT_DATA \ | |
023bf6f1 | 678 | EXIT_CALL \ |
405d967d | 679 | *(.discard) \ |
c7f52cdc | 680 | *(.discard.*) \ |
405d967d TH |
681 | } |
682 | ||
6ea0c34d MF |
683 | /** |
684 | * PERCPU_INPUT - the percpu input sections | |
685 | * @cacheline: cacheline size | |
686 | * | |
687 | * The core percpu section names and core symbols which do not rely | |
688 | * directly upon load addresses. | |
689 | * | |
690 | * @cacheline is used to align subsections to avoid false cacheline | |
691 | * sharing between subsections for different purposes. | |
692 | */ | |
693 | #define PERCPU_INPUT(cacheline) \ | |
694 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
695 | *(.data..percpu..first) \ | |
696 | . = ALIGN(PAGE_SIZE); \ | |
697 | *(.data..percpu..page_aligned) \ | |
698 | . = ALIGN(cacheline); \ | |
330d2822 | 699 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
700 | . = ALIGN(cacheline); \ |
701 | *(.data..percpu) \ | |
702 | *(.data..percpu..shared_aligned) \ | |
703 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
704 | ||
3e5d8f97 | 705 | /** |
6b7c38d5 | 706 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 707 | * @cacheline: cacheline size |
3e5d8f97 TH |
708 | * @vaddr: explicit base address (optional) |
709 | * @phdr: destination PHDR (optional) | |
710 | * | |
19df0c2f TH |
711 | * Macro which expands to output section for percpu area. |
712 | * | |
713 | * @cacheline is used to align subsections to avoid false cacheline | |
714 | * sharing between subsections for different purposes. | |
715 | * | |
716 | * If @vaddr is not blank, it specifies explicit base address and all | |
717 | * percpu symbols will be offset from the given address. If blank, | |
718 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
719 | * |
720 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
721 | * output PHDR is sticky. If @phdr is specified, the next output | |
722 | * section in the linker script will go there too. @phdr should have | |
723 | * a leading colon. | |
724 | * | |
3ac6cffe TH |
725 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
726 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 727 | * address, use PERCPU_SECTION. |
3e5d8f97 | 728 | */ |
19df0c2f | 729 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 730 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 731 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 732 | - LOAD_OFFSET) { \ |
6ea0c34d | 733 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 734 | } phdr \ |
3d9a854c | 735 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
736 | |
737 | /** | |
0415b00d | 738 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 739 | * @cacheline: cacheline size |
3e5d8f97 | 740 | * |
0415b00d TH |
741 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
742 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 743 | * __per_cpu_start will be identical. |
3ac6cffe | 744 | * |
0415b00d | 745 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
746 | * except that __per_cpu_load is defined as a relative symbol against |
747 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 748 | */ |
0415b00d TH |
749 | #define PERCPU_SECTION(cacheline) \ |
750 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 751 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 752 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 753 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 754 | } |
ef53dae8 SR |
755 | |
756 | ||
757 | /* | |
758 | * Definition of the high level *_SECTION macros | |
759 | * They will fit only a subset of the architectures | |
760 | */ | |
761 | ||
762 | ||
763 | /* | |
764 | * Writeable data. | |
765 | * All sections are combined in a single .data section. | |
766 | * The sections following CONSTRUCTORS are arranged so their | |
767 | * typical alignment matches. | |
768 | * A cacheline is typical/always less than a PAGE_SIZE so | |
769 | * the sections that has this restriction (or similar) | |
770 | * is located before the ones requiring PAGE_SIZE alignment. | |
771 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 772 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 773 | * |
7923f90f | 774 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 775 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
776 | . = ALIGN(PAGE_SIZE); \ |
777 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 778 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
779 | NOSAVE_DATA \ |
780 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
781 | CACHELINE_ALIGNED_DATA(cacheline) \ |
782 | READ_MOSTLY_DATA(cacheline) \ | |
783 | DATA_DATA \ | |
784 | CONSTRUCTORS \ | |
ef53dae8 SR |
785 | } |
786 | ||
787 | #define INIT_TEXT_SECTION(inittext_align) \ | |
788 | . = ALIGN(inittext_align); \ | |
789 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
790 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
791 | INIT_TEXT \ | |
792 | VMLINUX_SYMBOL(_einittext) = .; \ | |
793 | } | |
794 | ||
795 | #define INIT_DATA_SECTION(initsetup_align) \ | |
796 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
797 | INIT_DATA \ | |
798 | INIT_SETUP(initsetup_align) \ | |
799 | INIT_CALLS \ | |
800 | CON_INITCALL \ | |
801 | SECURITY_INITCALL \ | |
802 | INIT_RAM_FS \ | |
803 | } | |
804 | ||
04e448d9 TA |
805 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
806 | . = ALIGN(sbss_align); \ | |
807 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
808 | SBSS(sbss_align) \ | |
ef53dae8 | 809 | BSS(bss_align) \ |
04e448d9 TA |
810 | . = ALIGN(stop_align); \ |
811 | VMLINUX_SYMBOL(__bss_stop) = .; |