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 | ||
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 | */ | |
71 | #ifdef CONFIG_HOTPLUG | |
72 | #define DEV_KEEP(sec) *(.dev##sec) | |
73 | #define DEV_DISCARD(sec) | |
74 | #else | |
75 | #define DEV_KEEP(sec) | |
76 | #define DEV_DISCARD(sec) *(.dev##sec) | |
77 | #endif | |
78 | ||
79 | #ifdef CONFIG_HOTPLUG_CPU | |
80 | #define CPU_KEEP(sec) *(.cpu##sec) | |
81 | #define CPU_DISCARD(sec) | |
82 | #else | |
83 | #define CPU_KEEP(sec) | |
84 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
85 | #endif | |
86 | ||
1a3fb6d4 | 87 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
88 | #define MEM_KEEP(sec) *(.mem##sec) |
89 | #define MEM_DISCARD(sec) | |
90 | #else | |
91 | #define MEM_KEEP(sec) | |
92 | #define MEM_DISCARD(sec) *(.mem##sec) | |
93 | #endif | |
94 | ||
8da3821b | 95 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
96 | #define MCOUNT_REC() . = ALIGN(8); \ |
97 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
98 | *(__mcount_loc) \ |
99 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
100 | #else | |
101 | #define MCOUNT_REC() | |
102 | #endif | |
eb8f6890 | 103 | |
2ed84eeb | 104 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
105 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
106 | *(_ftrace_annotated_branch) \ | |
107 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
108 | #else |
109 | #define LIKELY_PROFILE() | |
110 | #endif | |
111 | ||
2bcd521a SR |
112 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
113 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
114 | *(_ftrace_branch) \ | |
115 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
116 | #else | |
117 | #define BRANCH_PROFILE() | |
118 | #endif | |
119 | ||
5f77a88b | 120 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
121 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
122 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
b77e38aa SR |
123 | *(_ftrace_events) \ |
124 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; | |
125 | #else | |
126 | #define FTRACE_EVENTS() | |
127 | #endif | |
128 | ||
1ba28e02 LJ |
129 | #ifdef CONFIG_TRACING |
130 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
131 | *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \ | |
132 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; | |
133 | #else | |
134 | #define TRACE_PRINTKS() | |
135 | #endif | |
136 | ||
bed1ffca | 137 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
138 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
139 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
bed1ffca FW |
140 | *(__syscalls_metadata) \ |
141 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; | |
142 | #else | |
143 | #define TRACE_SYSCALLS() | |
144 | #endif | |
145 | ||
ae278a93 SW |
146 | #ifdef CONFIG_CLKSRC_OF |
147 | #define CLKSRC_OF_TABLES() . = ALIGN(8); \ | |
148 | VMLINUX_SYMBOL(__clksrc_of_table) = .; \ | |
149 | *(__clksrc_of_table) \ | |
150 | *(__clksrc_of_table_end) | |
151 | #else | |
152 | #define CLKSRC_OF_TABLES() | |
153 | #endif | |
aab94339 | 154 | |
f6e916b8 TP |
155 | #ifdef CONFIG_IRQCHIP |
156 | #define IRQCHIP_OF_MATCH_TABLE() \ | |
157 | . = ALIGN(8); \ | |
158 | VMLINUX_SYMBOL(__irqchip_begin) = .; \ | |
159 | *(__irqchip_of_table) \ | |
160 | *(__irqchip_of_end) | |
161 | #else | |
162 | #define IRQCHIP_OF_MATCH_TABLE() | |
163 | #endif | |
aab94339 | 164 | |
f2f6c255 PG |
165 | #ifdef CONFIG_COMMON_CLK |
166 | #define CLK_OF_TABLES() . = ALIGN(8); \ | |
167 | VMLINUX_SYMBOL(__clk_of_table) = .; \ | |
168 | *(__clk_of_table) \ | |
169 | *(__clk_of_table_end) | |
170 | #else | |
171 | #define CLK_OF_TABLES() | |
172 | #endif | |
173 | ||
aab94339 DB |
174 | #define KERNEL_DTB() \ |
175 | STRUCT_ALIGN(); \ | |
176 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
177 | *(.dtb.init.rodata) \ | |
178 | VMLINUX_SYMBOL(__dtb_end) = .; | |
179 | ||
ca967258 SR |
180 | /* .data section */ |
181 | #define DATA_DATA \ | |
0e0d314e | 182 | *(.data) \ |
312b1485 | 183 | *(.ref.data) \ |
d356c0b6 | 184 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
185 | DEV_KEEP(init.data) \ |
186 | DEV_KEEP(exit.data) \ | |
187 | CPU_KEEP(init.data) \ | |
188 | CPU_KEEP(exit.data) \ | |
189 | MEM_KEEP(init.data) \ | |
190 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 191 | *(.data.unlikely) \ |
65498646 | 192 | STRUCT_ALIGN(); \ |
97e1c18e | 193 | *(__tracepoints) \ |
e9d376f0 | 194 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
195 | . = ALIGN(8); \ |
196 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
197 | *(__jump_table) \ | |
198 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ | |
e9d376f0 JB |
199 | . = ALIGN(8); \ |
200 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
201 | *(__verbose) \ | |
202 | VMLINUX_SYMBOL(__stop___verbose) = .; \ | |
2bcd521a | 203 | LIKELY_PROFILE() \ |
b77e38aa | 204 | BRANCH_PROFILE() \ |
3d56e331 | 205 | TRACE_PRINTKS() |
ca967258 | 206 | |
ef53dae8 SR |
207 | /* |
208 | * Data section helpers | |
209 | */ | |
210 | #define NOSAVE_DATA \ | |
211 | . = ALIGN(PAGE_SIZE); \ | |
212 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 213 | *(.data..nosave) \ |
ef53dae8 SR |
214 | . = ALIGN(PAGE_SIZE); \ |
215 | VMLINUX_SYMBOL(__nosave_end) = .; | |
216 | ||
217 | #define PAGE_ALIGNED_DATA(page_align) \ | |
218 | . = ALIGN(page_align); \ | |
75b13483 | 219 | *(.data..page_aligned) |
ef53dae8 SR |
220 | |
221 | #define READ_MOSTLY_DATA(align) \ | |
222 | . = ALIGN(align); \ | |
8369744f SL |
223 | *(.data..read_mostly) \ |
224 | . = ALIGN(align); | |
ef53dae8 SR |
225 | |
226 | #define CACHELINE_ALIGNED_DATA(align) \ | |
227 | . = ALIGN(align); \ | |
4af57b78 | 228 | *(.data..cacheline_aligned) |
ef53dae8 | 229 | |
39a449d9 | 230 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 231 | . = ALIGN(align); \ |
2af7687f | 232 | *(.data..init_task) |
ef53dae8 SR |
233 | |
234 | /* | |
235 | * Read only Data | |
236 | */ | |
237 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 238 | . = ALIGN((align)); \ |
1da177e4 | 239 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 240 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 LT |
241 | *(.rodata) *(.rodata.*) \ |
242 | *(__vermagic) /* Kernel version magic */ \ | |
65498646 MD |
243 | . = ALIGN(8); \ |
244 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
245 | *(__tracepoints_ptrs) /* Tracepoints: pointer array */\ | |
246 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ | |
97e1c18e | 247 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
248 | } \ |
249 | \ | |
250 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
251 | *(.rodata1) \ | |
252 | } \ | |
253 | \ | |
6360b1fb JB |
254 | BUG_TABLE \ |
255 | \ | |
1da177e4 LT |
256 | /* PCI quirks */ \ |
257 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
258 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
259 | *(.pci_fixup_early) \ | |
260 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ | |
261 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
262 | *(.pci_fixup_header) \ | |
263 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ | |
264 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
265 | *(.pci_fixup_final) \ | |
266 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ | |
267 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
268 | *(.pci_fixup_enable) \ | |
269 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ | |
1597cacb AC |
270 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
271 | *(.pci_fixup_resume) \ | |
272 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ | |
e1a2a51e RW |
273 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
274 | *(.pci_fixup_resume_early) \ | |
275 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ | |
276 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
277 | *(.pci_fixup_suspend) \ | |
278 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ | |
1da177e4 LT |
279 | } \ |
280 | \ | |
5658c769 DW |
281 | /* Built-in firmware blobs */ \ |
282 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
283 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
284 | *(.builtin_fw) \ | |
285 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ | |
286 | } \ | |
287 | \ | |
394b701c | 288 | /* RapidIO route ops */ \ |
e5cabeb3 | 289 | .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \ |
058f88d6 AB |
290 | VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \ |
291 | *(.rio_switch_ops) \ | |
292 | VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \ | |
394b701c MP |
293 | } \ |
294 | \ | |
63687a52 JB |
295 | TRACEDATA \ |
296 | \ | |
1da177e4 LT |
297 | /* Kernel symbol table: Normal symbols */ \ |
298 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
299 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
f02e8a65 | 300 | *(SORT(___ksymtab+*)) \ |
1da177e4 LT |
301 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
302 | } \ | |
303 | \ | |
304 | /* Kernel symbol table: GPL-only symbols */ \ | |
305 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
306 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
f02e8a65 | 307 | *(SORT(___ksymtab_gpl+*)) \ |
1da177e4 LT |
308 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
309 | } \ | |
310 | \ | |
f71d20e9 AV |
311 | /* Kernel symbol table: Normal unused symbols */ \ |
312 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
313 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
f02e8a65 | 314 | *(SORT(___ksymtab_unused+*)) \ |
f71d20e9 AV |
315 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
316 | } \ | |
317 | \ | |
318 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
319 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
320 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
f02e8a65 | 321 | *(SORT(___ksymtab_unused_gpl+*)) \ |
f71d20e9 AV |
322 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
323 | } \ | |
324 | \ | |
9f28bb7e GKH |
325 | /* Kernel symbol table: GPL-future-only symbols */ \ |
326 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
327 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
f02e8a65 | 328 | *(SORT(___ksymtab_gpl_future+*)) \ |
9f28bb7e GKH |
329 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
330 | } \ | |
331 | \ | |
1da177e4 LT |
332 | /* Kernel symbol table: Normal symbols */ \ |
333 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
334 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
f02e8a65 | 335 | *(SORT(___kcrctab+*)) \ |
1da177e4 LT |
336 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
337 | } \ | |
338 | \ | |
339 | /* Kernel symbol table: GPL-only symbols */ \ | |
340 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
341 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
f02e8a65 | 342 | *(SORT(___kcrctab_gpl+*)) \ |
1da177e4 LT |
343 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
344 | } \ | |
345 | \ | |
f71d20e9 AV |
346 | /* Kernel symbol table: Normal unused symbols */ \ |
347 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
348 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
f02e8a65 | 349 | *(SORT(___kcrctab_unused+*)) \ |
f71d20e9 AV |
350 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
351 | } \ | |
352 | \ | |
353 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
354 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
355 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
f02e8a65 | 356 | *(SORT(___kcrctab_unused_gpl+*)) \ |
f71d20e9 AV |
357 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
358 | } \ | |
359 | \ | |
9f28bb7e GKH |
360 | /* Kernel symbol table: GPL-future-only symbols */ \ |
361 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
362 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
f02e8a65 | 363 | *(SORT(___kcrctab_gpl_future+*)) \ |
9f28bb7e GKH |
364 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
365 | } \ | |
366 | \ | |
1da177e4 LT |
367 | /* Kernel symbol table: strings */ \ |
368 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
369 | *(__ksymtab_strings) \ | |
370 | } \ | |
371 | \ | |
eb8f6890 SR |
372 | /* __*init sections */ \ |
373 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 374 | *(.ref.rodata) \ |
eb8f6890 SR |
375 | DEV_KEEP(init.rodata) \ |
376 | DEV_KEEP(exit.rodata) \ | |
377 | CPU_KEEP(init.rodata) \ | |
378 | CPU_KEEP(exit.rodata) \ | |
379 | MEM_KEEP(init.rodata) \ | |
380 | MEM_KEEP(exit.rodata) \ | |
381 | } \ | |
382 | \ | |
1da177e4 LT |
383 | /* Built-in module parameters. */ \ |
384 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
385 | VMLINUX_SYMBOL(__start___param) = .; \ | |
386 | *(__param) \ | |
387 | VMLINUX_SYMBOL(__stop___param) = .; \ | |
e94965ed DT |
388 | } \ |
389 | \ | |
390 | /* Built-in module versions. */ \ | |
391 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
392 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
393 | *(__modver) \ | |
394 | VMLINUX_SYMBOL(__stop___modver) = .; \ | |
edeed305 | 395 | . = ALIGN((align)); \ |
6569580d | 396 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 397 | } \ |
4096b46f SR |
398 | . = ALIGN((align)); |
399 | ||
ef53dae8 | 400 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 401 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
402 | #define RODATA RO_DATA_SECTION(4096) |
403 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
404 | |
405 | #define SECURITY_INIT \ | |
60bad7fa | 406 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 LT |
407 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
408 | *(.security_initcall.init) \ | |
409 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ | |
410 | } | |
411 | ||
7664709b SR |
412 | /* .text section. Map to function alignment to avoid address changes |
413 | * during second ld run in second ld pass when generating System.map */ | |
414 | #define TEXT_TEXT \ | |
415 | ALIGN_FUNCTION(); \ | |
fb5e2b37 | 416 | *(.text.hot) \ |
0e0d314e | 417 | *(.text) \ |
312b1485 | 418 | *(.ref.text) \ |
eb8f6890 SR |
419 | DEV_KEEP(init.text) \ |
420 | DEV_KEEP(exit.text) \ | |
421 | CPU_KEEP(init.text) \ | |
422 | CPU_KEEP(exit.text) \ | |
423 | MEM_KEEP(init.text) \ | |
fb5e2b37 JB |
424 | MEM_KEEP(exit.text) \ |
425 | *(.text.unlikely) | |
eb8f6890 | 426 | |
7664709b | 427 | |
6d30e3a8 SR |
428 | /* sched.text is aling to function alignment to secure we have same |
429 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 430 | #define SCHED_TEXT \ |
6d30e3a8 | 431 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
432 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
433 | *(.sched.text) \ | |
434 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
435 | ||
6d30e3a8 SR |
436 | /* spinlock.text is aling to function alignment to secure we have same |
437 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 438 | #define LOCK_TEXT \ |
6d30e3a8 | 439 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
440 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
441 | *(.spinlock.text) \ | |
442 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 PP |
443 | |
444 | #define KPROBES_TEXT \ | |
445 | ALIGN_FUNCTION(); \ | |
446 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
447 | *(.kprobes.text) \ | |
448 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 449 | |
ea714547 JO |
450 | #define ENTRY_TEXT \ |
451 | ALIGN_FUNCTION(); \ | |
452 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
453 | *(.entry.text) \ | |
454 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
455 | ||
a0343e82 FW |
456 | #ifdef CONFIG_FUNCTION_GRAPH_TRACER |
457 | #define IRQENTRY_TEXT \ | |
458 | ALIGN_FUNCTION(); \ | |
459 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
460 | *(.irqentry.text) \ | |
461 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
462 | #else | |
463 | #define IRQENTRY_TEXT | |
464 | #endif | |
465 | ||
37c514e3 | 466 | /* Section used for early init (in .S files) */ |
7923f90f | 467 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 468 | |
7923f90f | 469 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
470 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
471 | HEAD_TEXT \ | |
472 | } | |
473 | ||
474 | /* | |
475 | * Exception table | |
476 | */ | |
477 | #define EXCEPTION_TABLE(align) \ | |
478 | . = ALIGN(align); \ | |
479 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
480 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
481 | *(__ex_table) \ | |
482 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ | |
483 | } | |
484 | ||
485 | /* | |
486 | * Init task | |
487 | */ | |
39a449d9 | 488 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 489 | . = ALIGN(align); \ |
da5e37ef | 490 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 491 | INIT_TASK_DATA(align) \ |
ef53dae8 | 492 | } |
37c514e3 | 493 | |
b99b87f7 | 494 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
495 | #define KERNEL_CTORS() . = ALIGN(8); \ |
496 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
b99b87f7 PO |
497 | *(.ctors) \ |
498 | VMLINUX_SYMBOL(__ctors_end) = .; | |
499 | #else | |
500 | #define KERNEL_CTORS() | |
501 | #endif | |
502 | ||
01ba2bdc | 503 | /* init and exit section handling */ |
eb8f6890 SR |
504 | #define INIT_DATA \ |
505 | *(.init.data) \ | |
506 | DEV_DISCARD(init.data) \ | |
eb8f6890 | 507 | CPU_DISCARD(init.data) \ |
eb8f6890 | 508 | MEM_DISCARD(init.data) \ |
b99b87f7 | 509 | KERNEL_CTORS() \ |
4b3b4c5e | 510 | MCOUNT_REC() \ |
9fd49328 | 511 | *(.init.rodata) \ |
e4a9ea5e | 512 | FTRACE_EVENTS() \ |
3d56e331 | 513 | TRACE_SYSCALLS() \ |
fd6c3a8d JB |
514 | DEV_DISCARD(init.rodata) \ |
515 | CPU_DISCARD(init.rodata) \ | |
aab94339 | 516 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 517 | CLK_OF_TABLES() \ |
ae278a93 | 518 | CLKSRC_OF_TABLES() \ |
f6e916b8 TP |
519 | KERNEL_DTB() \ |
520 | IRQCHIP_OF_MATCH_TABLE() | |
eb8f6890 SR |
521 | |
522 | #define INIT_TEXT \ | |
523 | *(.init.text) \ | |
524 | DEV_DISCARD(init.text) \ | |
525 | CPU_DISCARD(init.text) \ | |
526 | MEM_DISCARD(init.text) | |
527 | ||
528 | #define EXIT_DATA \ | |
529 | *(.exit.data) \ | |
530 | DEV_DISCARD(exit.data) \ | |
531 | DEV_DISCARD(exit.rodata) \ | |
532 | CPU_DISCARD(exit.data) \ | |
533 | CPU_DISCARD(exit.rodata) \ | |
534 | MEM_DISCARD(exit.data) \ | |
535 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 536 | |
eb8f6890 SR |
537 | #define EXIT_TEXT \ |
538 | *(.exit.text) \ | |
539 | DEV_DISCARD(exit.text) \ | |
540 | CPU_DISCARD(exit.text) \ | |
541 | MEM_DISCARD(exit.text) | |
01ba2bdc | 542 | |
7923f90f SR |
543 | #define EXIT_CALL \ |
544 | *(.exitcall.exit) | |
545 | ||
ef53dae8 SR |
546 | /* |
547 | * bss (Block Started by Symbol) - uninitialized data | |
548 | * zeroed during startup | |
549 | */ | |
04e448d9 TA |
550 | #define SBSS(sbss_align) \ |
551 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
552 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
553 | *(.sbss) \ | |
554 | *(.scommon) \ | |
555 | } | |
556 | ||
c87728ca DD |
557 | /* |
558 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
559 | * sections to the front of bss. | |
560 | */ | |
561 | #ifndef BSS_FIRST_SECTIONS | |
562 | #define BSS_FIRST_SECTIONS | |
563 | #endif | |
564 | ||
ef53dae8 SR |
565 | #define BSS(bss_align) \ |
566 | . = ALIGN(bss_align); \ | |
567 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 568 | BSS_FIRST_SECTIONS \ |
7c74df07 | 569 | *(.bss..page_aligned) \ |
ef53dae8 SR |
570 | *(.dynbss) \ |
571 | *(.bss) \ | |
572 | *(COMMON) \ | |
ef53dae8 SR |
573 | } |
574 | ||
575 | /* | |
576 | * DWARF debug sections. | |
577 | * Symbols in the DWARF debugging sections are relative to | |
578 | * the beginning of the section so we begin them at 0. | |
579 | */ | |
a7d0c210 PBG |
580 | #define DWARF_DEBUG \ |
581 | /* DWARF 1 */ \ | |
582 | .debug 0 : { *(.debug) } \ | |
583 | .line 0 : { *(.line) } \ | |
584 | /* GNU DWARF 1 extensions */ \ | |
585 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
586 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
587 | /* DWARF 1.1 and DWARF 2 */ \ | |
588 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
589 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
590 | /* DWARF 2 */ \ | |
591 | .debug_info 0 : { *(.debug_info \ | |
592 | .gnu.linkonce.wi.*) } \ | |
593 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
594 | .debug_line 0 : { *(.debug_line) } \ | |
595 | .debug_frame 0 : { *(.debug_frame) } \ | |
596 | .debug_str 0 : { *(.debug_str) } \ | |
597 | .debug_loc 0 : { *(.debug_loc) } \ | |
598 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
599 | /* SGI/MIPS DWARF 2 extensions */ \ | |
600 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
601 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
602 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
603 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
604 | ||
605 | /* Stabs debugging sections. */ | |
606 | #define STABS_DEBUG \ | |
607 | .stab 0 : { *(.stab) } \ | |
608 | .stabstr 0 : { *(.stabstr) } \ | |
609 | .stab.excl 0 : { *(.stab.excl) } \ | |
610 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
611 | .stab.index 0 : { *(.stab.index) } \ | |
612 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
613 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 614 | |
6360b1fb | 615 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
616 | #define BUG_TABLE \ |
617 | . = ALIGN(8); \ | |
618 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 619 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
7664c5a1 | 620 | *(__bug_table) \ |
c6de0026 | 621 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 622 | } |
6360b1fb JB |
623 | #else |
624 | #define BUG_TABLE | |
625 | #endif | |
7664c5a1 | 626 | |
63687a52 JB |
627 | #ifdef CONFIG_PM_TRACE |
628 | #define TRACEDATA \ | |
629 | . = ALIGN(4); \ | |
630 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 631 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
63687a52 | 632 | *(.tracedata) \ |
c6de0026 | 633 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
634 | } |
635 | #else | |
636 | #define TRACEDATA | |
637 | #endif | |
638 | ||
9c9b8b38 | 639 | #define NOTES \ |
cbe87121 RM |
640 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
641 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
642 | *(.note.*) \ | |
643 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
644 | } | |
61ce1efe | 645 | |
ef53dae8 SR |
646 | #define INIT_SETUP(initsetup_align) \ |
647 | . = ALIGN(initsetup_align); \ | |
648 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
649 | *(.init.setup) \ | |
650 | VMLINUX_SYMBOL(__setup_end) = .; | |
651 | ||
026cee00 PM |
652 | #define INIT_CALLS_LEVEL(level) \ |
653 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
654 | *(.initcall##level##.init) \ | |
655 | *(.initcall##level##s.init) \ | |
61ce1efe | 656 | |
ef53dae8 SR |
657 | #define INIT_CALLS \ |
658 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
026cee00 PM |
659 | *(.initcallearly.init) \ |
660 | INIT_CALLS_LEVEL(0) \ | |
661 | INIT_CALLS_LEVEL(1) \ | |
662 | INIT_CALLS_LEVEL(2) \ | |
663 | INIT_CALLS_LEVEL(3) \ | |
664 | INIT_CALLS_LEVEL(4) \ | |
665 | INIT_CALLS_LEVEL(5) \ | |
666 | INIT_CALLS_LEVEL(rootfs) \ | |
667 | INIT_CALLS_LEVEL(6) \ | |
668 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
669 | VMLINUX_SYMBOL(__initcall_end) = .; |
670 | ||
671 | #define CON_INITCALL \ | |
672 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
673 | *(.con_initcall.init) \ | |
674 | VMLINUX_SYMBOL(__con_initcall_end) = .; | |
675 | ||
676 | #define SECURITY_INITCALL \ | |
677 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
678 | *(.security_initcall.init) \ | |
679 | VMLINUX_SYMBOL(__security_initcall_end) = .; | |
680 | ||
681 | #ifdef CONFIG_BLK_DEV_INITRD | |
682 | #define INIT_RAM_FS \ | |
d8826262 | 683 | . = ALIGN(4); \ |
ef53dae8 SR |
684 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
685 | *(.init.ramfs) \ | |
ffe8018c HB |
686 | . = ALIGN(8); \ |
687 | *(.init.ramfs.info) | |
ef53dae8 | 688 | #else |
eadfe219 | 689 | #define INIT_RAM_FS |
ef53dae8 SR |
690 | #endif |
691 | ||
023bf6f1 TH |
692 | /* |
693 | * Default discarded sections. | |
694 | * | |
695 | * Some archs want to discard exit text/data at runtime rather than | |
696 | * link time due to cross-section references such as alt instructions, | |
697 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
698 | * section definitions so that such archs put those in earlier section | |
699 | * definitions. | |
700 | */ | |
405d967d TH |
701 | #define DISCARDS \ |
702 | /DISCARD/ : { \ | |
703 | EXIT_TEXT \ | |
704 | EXIT_DATA \ | |
023bf6f1 | 705 | EXIT_CALL \ |
405d967d | 706 | *(.discard) \ |
c7f52cdc | 707 | *(.discard.*) \ |
405d967d TH |
708 | } |
709 | ||
6ea0c34d MF |
710 | /** |
711 | * PERCPU_INPUT - the percpu input sections | |
712 | * @cacheline: cacheline size | |
713 | * | |
714 | * The core percpu section names and core symbols which do not rely | |
715 | * directly upon load addresses. | |
716 | * | |
717 | * @cacheline is used to align subsections to avoid false cacheline | |
718 | * sharing between subsections for different purposes. | |
719 | */ | |
720 | #define PERCPU_INPUT(cacheline) \ | |
721 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
722 | *(.data..percpu..first) \ | |
723 | . = ALIGN(PAGE_SIZE); \ | |
724 | *(.data..percpu..page_aligned) \ | |
725 | . = ALIGN(cacheline); \ | |
726 | *(.data..percpu..readmostly) \ | |
727 | . = ALIGN(cacheline); \ | |
728 | *(.data..percpu) \ | |
729 | *(.data..percpu..shared_aligned) \ | |
730 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
731 | ||
3e5d8f97 | 732 | /** |
6b7c38d5 | 733 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 734 | * @cacheline: cacheline size |
3e5d8f97 TH |
735 | * @vaddr: explicit base address (optional) |
736 | * @phdr: destination PHDR (optional) | |
737 | * | |
19df0c2f TH |
738 | * Macro which expands to output section for percpu area. |
739 | * | |
740 | * @cacheline is used to align subsections to avoid false cacheline | |
741 | * sharing between subsections for different purposes. | |
742 | * | |
743 | * If @vaddr is not blank, it specifies explicit base address and all | |
744 | * percpu symbols will be offset from the given address. If blank, | |
745 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
746 | * |
747 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
748 | * output PHDR is sticky. If @phdr is specified, the next output | |
749 | * section in the linker script will go there too. @phdr should have | |
750 | * a leading colon. | |
751 | * | |
3ac6cffe TH |
752 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
753 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 754 | * address, use PERCPU_SECTION. |
3e5d8f97 | 755 | */ |
19df0c2f | 756 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 757 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 758 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 759 | - LOAD_OFFSET) { \ |
6ea0c34d | 760 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 761 | } phdr \ |
3d9a854c | 762 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
763 | |
764 | /** | |
0415b00d | 765 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 766 | * @cacheline: cacheline size |
3e5d8f97 | 767 | * |
0415b00d TH |
768 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
769 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 770 | * __per_cpu_start will be identical. |
3ac6cffe | 771 | * |
0415b00d | 772 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
773 | * except that __per_cpu_load is defined as a relative symbol against |
774 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 775 | */ |
0415b00d TH |
776 | #define PERCPU_SECTION(cacheline) \ |
777 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 778 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 779 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 780 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 781 | } |
ef53dae8 SR |
782 | |
783 | ||
784 | /* | |
785 | * Definition of the high level *_SECTION macros | |
786 | * They will fit only a subset of the architectures | |
787 | */ | |
788 | ||
789 | ||
790 | /* | |
791 | * Writeable data. | |
792 | * All sections are combined in a single .data section. | |
793 | * The sections following CONSTRUCTORS are arranged so their | |
794 | * typical alignment matches. | |
795 | * A cacheline is typical/always less than a PAGE_SIZE so | |
796 | * the sections that has this restriction (or similar) | |
797 | * is located before the ones requiring PAGE_SIZE alignment. | |
798 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 799 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 800 | * |
7923f90f | 801 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 802 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
803 | . = ALIGN(PAGE_SIZE); \ |
804 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 805 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
806 | NOSAVE_DATA \ |
807 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
808 | CACHELINE_ALIGNED_DATA(cacheline) \ |
809 | READ_MOSTLY_DATA(cacheline) \ | |
810 | DATA_DATA \ | |
811 | CONSTRUCTORS \ | |
ef53dae8 SR |
812 | } |
813 | ||
814 | #define INIT_TEXT_SECTION(inittext_align) \ | |
815 | . = ALIGN(inittext_align); \ | |
816 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
817 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
818 | INIT_TEXT \ | |
819 | VMLINUX_SYMBOL(_einittext) = .; \ | |
820 | } | |
821 | ||
822 | #define INIT_DATA_SECTION(initsetup_align) \ | |
823 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
824 | INIT_DATA \ | |
825 | INIT_SETUP(initsetup_align) \ | |
826 | INIT_CALLS \ | |
827 | CON_INITCALL \ | |
828 | SECURITY_INITCALL \ | |
829 | INIT_RAM_FS \ | |
830 | } | |
831 | ||
04e448d9 TA |
832 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
833 | . = ALIGN(sbss_align); \ | |
834 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
835 | SBSS(sbss_align) \ | |
ef53dae8 | 836 | BSS(bss_align) \ |
04e448d9 TA |
837 | . = ALIGN(stop_align); \ |
838 | VMLINUX_SYMBOL(__bss_stop) = .; |