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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 | |
562c85ca YW |
43 | * // __init_begin and __init_end should be page aligned, so that we can |
44 | * // free the whole .init memory | |
ef53dae8 SR |
45 | * [_stext, _etext] is the text section |
46 | * [_sdata, _edata] is the data section | |
47 | * | |
48 | * Some of the included output section have their own set of constants. | |
49 | * Examples are: [__initramfs_start, __initramfs_end] for initramfs and | |
50 | * [__nosave_begin, __nosave_end] for the nosave data | |
51 | */ | |
c80d471a | 52 | |
1da177e4 LT |
53 | #ifndef LOAD_OFFSET |
54 | #define LOAD_OFFSET 0 | |
55 | #endif | |
56 | ||
6d30e3a8 SR |
57 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
58 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
59 | ||
cb87481e NP |
60 | /* |
61 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which | |
62 | * generates .data.identifier sections, which need to be pulled in with | |
63 | * .data. We don't want to pull in .data..other sections, which Linux | |
64 | * has defined. Same for text and bss. | |
266ff2a8 NP |
65 | * |
66 | * RODATA_MAIN is not used because existing code already defines .rodata.x | |
67 | * sections to be brought in with rodata. | |
cb87481e NP |
68 | */ |
69 | #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
70 | #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* | |
52c8ee5b | 71 | #define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..LPBX* |
266ff2a8 NP |
72 | #define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]* |
73 | #define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* | |
cb87481e | 74 | #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* |
266ff2a8 | 75 | #define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]* |
cb87481e NP |
76 | #else |
77 | #define TEXT_MAIN .text | |
78 | #define DATA_MAIN .data | |
266ff2a8 NP |
79 | #define SDATA_MAIN .sdata |
80 | #define RODATA_MAIN .rodata | |
cb87481e | 81 | #define BSS_MAIN .bss |
266ff2a8 | 82 | #define SBSS_MAIN .sbss |
cb87481e NP |
83 | #endif |
84 | ||
07fca0e5 SR |
85 | /* |
86 | * Align to a 32 byte boundary equal to the | |
87 | * alignment gcc 4.5 uses for a struct | |
88 | */ | |
aab94339 DB |
89 | #define STRUCT_ALIGNMENT 32 |
90 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 91 | |
eb8f6890 SR |
92 | /* The actual configuration determine if the init/exit sections |
93 | * are handled as text/data or they can be discarded (which | |
94 | * often happens at runtime) | |
95 | */ | |
eb8f6890 SR |
96 | #ifdef CONFIG_HOTPLUG_CPU |
97 | #define CPU_KEEP(sec) *(.cpu##sec) | |
98 | #define CPU_DISCARD(sec) | |
99 | #else | |
100 | #define CPU_KEEP(sec) | |
101 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
102 | #endif | |
103 | ||
1a3fb6d4 | 104 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
105 | #define MEM_KEEP(sec) *(.mem##sec) |
106 | #define MEM_DISCARD(sec) | |
107 | #else | |
108 | #define MEM_KEEP(sec) | |
109 | #define MEM_DISCARD(sec) *(.mem##sec) | |
110 | #endif | |
111 | ||
8da3821b | 112 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e | 113 | #define MCOUNT_REC() . = ALIGN(8); \ |
a6214385 | 114 | __start_mcount_loc = .; \ |
266ff2a8 | 115 | KEEP(*(__mcount_loc)) \ |
a6214385 | 116 | __stop_mcount_loc = .; |
8da3821b SR |
117 | #else |
118 | #define MCOUNT_REC() | |
119 | #endif | |
eb8f6890 | 120 | |
2ed84eeb | 121 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
a6214385 | 122 | #define LIKELY_PROFILE() __start_annotated_branch_profile = .; \ |
266ff2a8 | 123 | KEEP(*(_ftrace_annotated_branch)) \ |
a6214385 | 124 | __stop_annotated_branch_profile = .; |
1f0d69a9 SR |
125 | #else |
126 | #define LIKELY_PROFILE() | |
127 | #endif | |
128 | ||
2bcd521a | 129 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
a6214385 | 130 | #define BRANCH_PROFILE() __start_branch_profile = .; \ |
266ff2a8 | 131 | KEEP(*(_ftrace_branch)) \ |
a6214385 | 132 | __stop_branch_profile = .; |
2bcd521a SR |
133 | #else |
134 | #define BRANCH_PROFILE() | |
135 | #endif | |
136 | ||
376e2424 | 137 | #ifdef CONFIG_KPROBES |
69902c71 | 138 | #define KPROBE_BLACKLIST() . = ALIGN(8); \ |
a6214385 | 139 | __start_kprobe_blacklist = .; \ |
4b89b7f7 | 140 | KEEP(*(_kprobe_blacklist)) \ |
a6214385 | 141 | __stop_kprobe_blacklist = .; |
376e2424 MH |
142 | #else |
143 | #define KPROBE_BLACKLIST() | |
144 | #endif | |
145 | ||
540adea3 | 146 | #ifdef CONFIG_FUNCTION_ERROR_INJECTION |
663faf9f | 147 | #define ERROR_INJECT_WHITELIST() STRUCT_ALIGN(); \ |
a6214385 | 148 | __start_error_injection_whitelist = .; \ |
540adea3 | 149 | KEEP(*(_error_injection_whitelist)) \ |
a6214385 | 150 | __stop_error_injection_whitelist = .; |
92ace999 | 151 | #else |
540adea3 | 152 | #define ERROR_INJECT_WHITELIST() |
92ace999 JB |
153 | #endif |
154 | ||
5f77a88b | 155 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e | 156 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
a6214385 | 157 | __start_ftrace_events = .; \ |
4b89b7f7 | 158 | KEEP(*(_ftrace_events)) \ |
a6214385 MY |
159 | __stop_ftrace_events = .; \ |
160 | __start_ftrace_eval_maps = .; \ | |
02fd7f68 | 161 | KEEP(*(_ftrace_eval_map)) \ |
a6214385 | 162 | __stop_ftrace_eval_maps = .; |
b77e38aa SR |
163 | #else |
164 | #define FTRACE_EVENTS() | |
165 | #endif | |
166 | ||
1ba28e02 | 167 | #ifdef CONFIG_TRACING |
a6214385 | 168 | #define TRACE_PRINTKS() __start___trace_bprintk_fmt = .; \ |
4b89b7f7 | 169 | KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ |
a6214385 MY |
170 | __stop___trace_bprintk_fmt = .; |
171 | #define TRACEPOINT_STR() __start___tracepoint_str = .; \ | |
4b89b7f7 | 172 | KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ |
a6214385 | 173 | __stop___tracepoint_str = .; |
1ba28e02 LJ |
174 | #else |
175 | #define TRACE_PRINTKS() | |
102c9323 | 176 | #define TRACEPOINT_STR() |
1ba28e02 LJ |
177 | #endif |
178 | ||
bed1ffca | 179 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 | 180 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
a6214385 | 181 | __start_syscalls_metadata = .; \ |
4b89b7f7 | 182 | KEEP(*(__syscalls_metadata)) \ |
a6214385 | 183 | __stop_syscalls_metadata = .; |
bed1ffca FW |
184 | #else |
185 | #define TRACE_SYSCALLS() | |
186 | #endif | |
187 | ||
c4f6699d AS |
188 | #ifdef CONFIG_BPF_EVENTS |
189 | #define BPF_RAW_TP() STRUCT_ALIGN(); \ | |
a6214385 | 190 | __start__bpf_raw_tp = .; \ |
c4f6699d | 191 | KEEP(*(__bpf_raw_tp_map)) \ |
a6214385 | 192 | __stop__bpf_raw_tp = .; |
c4f6699d AS |
193 | #else |
194 | #define BPF_RAW_TP() | |
195 | #endif | |
196 | ||
470ca0de | 197 | #ifdef CONFIG_SERIAL_EARLYCON |
dd709e72 | 198 | #define EARLYCON_TABLE() . = ALIGN(8); \ |
a6214385 | 199 | __earlycon_table = .; \ |
4b89b7f7 | 200 | KEEP(*(__earlycon_table)) \ |
a6214385 | 201 | __earlycon_table_end = .; |
470ca0de PH |
202 | #else |
203 | #define EARLYCON_TABLE() | |
204 | #endif | |
aab94339 | 205 | |
3ac946d1 KC |
206 | #ifdef CONFIG_SECURITY |
207 | #define LSM_TABLE() . = ALIGN(8); \ | |
208 | __start_lsm_info = .; \ | |
209 | KEEP(*(.lsm_info.init)) \ | |
210 | __end_lsm_info = .; | |
211 | #else | |
212 | #define LSM_TABLE() | |
213 | #endif | |
214 | ||
06309288 RH |
215 | #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) |
216 | #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) | |
5ee02af1 | 217 | #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) |
06309288 RH |
218 | #define _OF_TABLE_0(name) |
219 | #define _OF_TABLE_1(name) \ | |
f6e916b8 | 220 | . = ALIGN(8); \ |
a6214385 | 221 | __##name##_of_table = .; \ |
4b89b7f7 NP |
222 | KEEP(*(__##name##_of_table)) \ |
223 | KEEP(*(__##name##_of_table_end)) | |
06309288 | 224 | |
bb0eb050 | 225 | #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) |
06309288 RH |
226 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) |
227 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
228 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) | |
229 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
449e056c | 230 | #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) |
6c3ff8b1 | 231 | |
e647b532 MZ |
232 | #ifdef CONFIG_ACPI |
233 | #define ACPI_PROBE_TABLE(name) \ | |
234 | . = ALIGN(8); \ | |
a6214385 | 235 | __##name##_acpi_probe_table = .; \ |
4b89b7f7 | 236 | KEEP(*(__##name##_acpi_probe_table)) \ |
a6214385 | 237 | __##name##_acpi_probe_table_end = .; |
e647b532 MZ |
238 | #else |
239 | #define ACPI_PROBE_TABLE(name) | |
240 | #endif | |
241 | ||
aab94339 DB |
242 | #define KERNEL_DTB() \ |
243 | STRUCT_ALIGN(); \ | |
a6214385 | 244 | __dtb_start = .; \ |
4b89b7f7 | 245 | KEEP(*(.dtb.init.rodata)) \ |
a6214385 | 246 | __dtb_end = .; |
aab94339 | 247 | |
b67067f1 NP |
248 | /* |
249 | * .data section | |
b67067f1 | 250 | */ |
ca967258 | 251 | #define DATA_DATA \ |
129f6c48 | 252 | *(.xiptext) \ |
cb87481e | 253 | *(DATA_MAIN) \ |
312b1485 | 254 | *(.ref.data) \ |
d356c0b6 | 255 | *(.data..shared_aligned) /* percpu related */ \ |
266ff2a8 NP |
256 | MEM_KEEP(init.data*) \ |
257 | MEM_KEEP(exit.data*) \ | |
7ccaba53 | 258 | *(.data.unlikely) \ |
a6214385 | 259 | __start_once = .; \ |
b1fca27d | 260 | *(.data.once) \ |
a6214385 | 261 | __end_once = .; \ |
65498646 | 262 | STRUCT_ALIGN(); \ |
97e1c18e | 263 | *(__tracepoints) \ |
e9d376f0 JB |
264 | /* implement dynamic printk debug */ \ |
265 | . = ALIGN(8); \ | |
a6214385 | 266 | __start___verbose = .; \ |
4b89b7f7 | 267 | KEEP(*(__verbose)) \ |
a6214385 | 268 | __stop___verbose = .; \ |
2bcd521a | 269 | LIKELY_PROFILE() \ |
b77e38aa | 270 | BRANCH_PROFILE() \ |
102c9323 | 271 | TRACE_PRINTKS() \ |
c4f6699d | 272 | BPF_RAW_TP() \ |
102c9323 | 273 | TRACEPOINT_STR() |
ca967258 | 274 | |
ef53dae8 SR |
275 | /* |
276 | * Data section helpers | |
277 | */ | |
278 | #define NOSAVE_DATA \ | |
279 | . = ALIGN(PAGE_SIZE); \ | |
a6214385 | 280 | __nosave_begin = .; \ |
07b3bb1e | 281 | *(.data..nosave) \ |
ef53dae8 | 282 | . = ALIGN(PAGE_SIZE); \ |
a6214385 | 283 | __nosave_end = .; |
ef53dae8 SR |
284 | |
285 | #define PAGE_ALIGNED_DATA(page_align) \ | |
286 | . = ALIGN(page_align); \ | |
75b13483 | 287 | *(.data..page_aligned) |
ef53dae8 SR |
288 | |
289 | #define READ_MOSTLY_DATA(align) \ | |
290 | . = ALIGN(align); \ | |
8369744f SL |
291 | *(.data..read_mostly) \ |
292 | . = ALIGN(align); | |
ef53dae8 SR |
293 | |
294 | #define CACHELINE_ALIGNED_DATA(align) \ | |
295 | . = ALIGN(align); \ | |
4af57b78 | 296 | *(.data..cacheline_aligned) |
ef53dae8 | 297 | |
39a449d9 | 298 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 299 | . = ALIGN(align); \ |
a6214385 MY |
300 | __start_init_task = .; \ |
301 | init_thread_union = .; \ | |
302 | init_stack = .; \ | |
266ff2a8 NP |
303 | KEEP(*(.data..init_task)) \ |
304 | KEEP(*(.data..init_thread_info)) \ | |
a6214385 MY |
305 | . = __start_init_task + THREAD_SIZE; \ |
306 | __end_init_task = .; | |
ef53dae8 | 307 | |
e872267b AB |
308 | #define JUMP_TABLE_DATA \ |
309 | . = ALIGN(8); \ | |
310 | __start___jump_table = .; \ | |
311 | KEEP(*(__jump_table)) \ | |
312 | __stop___jump_table = .; | |
313 | ||
32fb2fc5 HC |
314 | /* |
315 | * Allow architectures to handle ro_after_init data on their | |
316 | * own by defining an empty RO_AFTER_INIT_DATA. | |
317 | */ | |
318 | #ifndef RO_AFTER_INIT_DATA | |
d7c19b06 | 319 | #define RO_AFTER_INIT_DATA \ |
a6214385 | 320 | __start_ro_after_init = .; \ |
d7c19b06 | 321 | *(.data..ro_after_init) \ |
e872267b | 322 | JUMP_TABLE_DATA \ |
a6214385 | 323 | __end_ro_after_init = .; |
32fb2fc5 HC |
324 | #endif |
325 | ||
ef53dae8 SR |
326 | /* |
327 | * Read only Data | |
328 | */ | |
329 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 330 | . = ALIGN((align)); \ |
1da177e4 | 331 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
a6214385 | 332 | __start_rodata = .; \ |
1da177e4 | 333 | *(.rodata) *(.rodata.*) \ |
32fb2fc5 | 334 | RO_AFTER_INIT_DATA /* Read only after init */ \ |
65498646 | 335 | . = ALIGN(8); \ |
a6214385 | 336 | __start___tracepoints_ptrs = .; \ |
4b89b7f7 | 337 | KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ |
a6214385 | 338 | __stop___tracepoints_ptrs = .; \ |
97e1c18e | 339 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
340 | } \ |
341 | \ | |
342 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
343 | *(.rodata1) \ | |
344 | } \ | |
345 | \ | |
346 | /* PCI quirks */ \ | |
347 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
a6214385 | 348 | __start_pci_fixups_early = .; \ |
4b89b7f7 | 349 | KEEP(*(.pci_fixup_early)) \ |
a6214385 MY |
350 | __end_pci_fixups_early = .; \ |
351 | __start_pci_fixups_header = .; \ | |
4b89b7f7 | 352 | KEEP(*(.pci_fixup_header)) \ |
a6214385 MY |
353 | __end_pci_fixups_header = .; \ |
354 | __start_pci_fixups_final = .; \ | |
4b89b7f7 | 355 | KEEP(*(.pci_fixup_final)) \ |
a6214385 MY |
356 | __end_pci_fixups_final = .; \ |
357 | __start_pci_fixups_enable = .; \ | |
4b89b7f7 | 358 | KEEP(*(.pci_fixup_enable)) \ |
a6214385 MY |
359 | __end_pci_fixups_enable = .; \ |
360 | __start_pci_fixups_resume = .; \ | |
4b89b7f7 | 361 | KEEP(*(.pci_fixup_resume)) \ |
a6214385 MY |
362 | __end_pci_fixups_resume = .; \ |
363 | __start_pci_fixups_resume_early = .; \ | |
4b89b7f7 | 364 | KEEP(*(.pci_fixup_resume_early)) \ |
a6214385 MY |
365 | __end_pci_fixups_resume_early = .; \ |
366 | __start_pci_fixups_suspend = .; \ | |
4b89b7f7 | 367 | KEEP(*(.pci_fixup_suspend)) \ |
a6214385 MY |
368 | __end_pci_fixups_suspend = .; \ |
369 | __start_pci_fixups_suspend_late = .; \ | |
4b89b7f7 | 370 | KEEP(*(.pci_fixup_suspend_late)) \ |
a6214385 | 371 | __end_pci_fixups_suspend_late = .; \ |
1da177e4 LT |
372 | } \ |
373 | \ | |
5658c769 DW |
374 | /* Built-in firmware blobs */ \ |
375 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
a6214385 | 376 | __start_builtin_fw = .; \ |
4b89b7f7 | 377 | KEEP(*(.builtin_fw)) \ |
a6214385 | 378 | __end_builtin_fw = .; \ |
5658c769 DW |
379 | } \ |
380 | \ | |
63687a52 JB |
381 | TRACEDATA \ |
382 | \ | |
1da177e4 LT |
383 | /* Kernel symbol table: Normal symbols */ \ |
384 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
a6214385 | 385 | __start___ksymtab = .; \ |
b67067f1 | 386 | KEEP(*(SORT(___ksymtab+*))) \ |
a6214385 | 387 | __stop___ksymtab = .; \ |
1da177e4 LT |
388 | } \ |
389 | \ | |
390 | /* Kernel symbol table: GPL-only symbols */ \ | |
391 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
a6214385 | 392 | __start___ksymtab_gpl = .; \ |
b67067f1 | 393 | KEEP(*(SORT(___ksymtab_gpl+*))) \ |
a6214385 | 394 | __stop___ksymtab_gpl = .; \ |
1da177e4 LT |
395 | } \ |
396 | \ | |
f71d20e9 AV |
397 | /* Kernel symbol table: Normal unused symbols */ \ |
398 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
a6214385 | 399 | __start___ksymtab_unused = .; \ |
b67067f1 | 400 | KEEP(*(SORT(___ksymtab_unused+*))) \ |
a6214385 | 401 | __stop___ksymtab_unused = .; \ |
f71d20e9 AV |
402 | } \ |
403 | \ | |
404 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
405 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
a6214385 | 406 | __start___ksymtab_unused_gpl = .; \ |
b67067f1 | 407 | KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ |
a6214385 | 408 | __stop___ksymtab_unused_gpl = .; \ |
f71d20e9 AV |
409 | } \ |
410 | \ | |
9f28bb7e GKH |
411 | /* Kernel symbol table: GPL-future-only symbols */ \ |
412 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
a6214385 | 413 | __start___ksymtab_gpl_future = .; \ |
b67067f1 | 414 | KEEP(*(SORT(___ksymtab_gpl_future+*))) \ |
a6214385 | 415 | __stop___ksymtab_gpl_future = .; \ |
9f28bb7e GKH |
416 | } \ |
417 | \ | |
1da177e4 LT |
418 | /* Kernel symbol table: Normal symbols */ \ |
419 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
a6214385 | 420 | __start___kcrctab = .; \ |
b67067f1 | 421 | KEEP(*(SORT(___kcrctab+*))) \ |
a6214385 | 422 | __stop___kcrctab = .; \ |
1da177e4 LT |
423 | } \ |
424 | \ | |
425 | /* Kernel symbol table: GPL-only symbols */ \ | |
426 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
a6214385 | 427 | __start___kcrctab_gpl = .; \ |
b67067f1 | 428 | KEEP(*(SORT(___kcrctab_gpl+*))) \ |
a6214385 | 429 | __stop___kcrctab_gpl = .; \ |
1da177e4 LT |
430 | } \ |
431 | \ | |
f71d20e9 AV |
432 | /* Kernel symbol table: Normal unused symbols */ \ |
433 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
a6214385 | 434 | __start___kcrctab_unused = .; \ |
b67067f1 | 435 | KEEP(*(SORT(___kcrctab_unused+*))) \ |
a6214385 | 436 | __stop___kcrctab_unused = .; \ |
f71d20e9 AV |
437 | } \ |
438 | \ | |
439 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
440 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
a6214385 | 441 | __start___kcrctab_unused_gpl = .; \ |
b67067f1 | 442 | KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ |
a6214385 | 443 | __stop___kcrctab_unused_gpl = .; \ |
f71d20e9 AV |
444 | } \ |
445 | \ | |
9f28bb7e GKH |
446 | /* Kernel symbol table: GPL-future-only symbols */ \ |
447 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
a6214385 | 448 | __start___kcrctab_gpl_future = .; \ |
b67067f1 | 449 | KEEP(*(SORT(___kcrctab_gpl_future+*))) \ |
a6214385 | 450 | __stop___kcrctab_gpl_future = .; \ |
9f28bb7e GKH |
451 | } \ |
452 | \ | |
1da177e4 LT |
453 | /* Kernel symbol table: strings */ \ |
454 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
4b89b7f7 | 455 | *(__ksymtab_strings) \ |
1da177e4 LT |
456 | } \ |
457 | \ | |
eb8f6890 SR |
458 | /* __*init sections */ \ |
459 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 460 | *(.ref.rodata) \ |
eb8f6890 SR |
461 | MEM_KEEP(init.rodata) \ |
462 | MEM_KEEP(exit.rodata) \ | |
463 | } \ | |
464 | \ | |
1da177e4 LT |
465 | /* Built-in module parameters. */ \ |
466 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
a6214385 | 467 | __start___param = .; \ |
4b89b7f7 | 468 | KEEP(*(__param)) \ |
a6214385 | 469 | __stop___param = .; \ |
e94965ed DT |
470 | } \ |
471 | \ | |
472 | /* Built-in module versions. */ \ | |
473 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
a6214385 | 474 | __start___modver = .; \ |
4b89b7f7 | 475 | KEEP(*(__modver)) \ |
a6214385 | 476 | __stop___modver = .; \ |
edeed305 | 477 | . = ALIGN((align)); \ |
a6214385 | 478 | __end_rodata = .; \ |
7583ddfd | 479 | } \ |
4096b46f SR |
480 | . = ALIGN((align)); |
481 | ||
ef53dae8 | 482 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 483 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
484 | #define RODATA RO_DATA_SECTION(4096) |
485 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 | 486 | |
cb87481e NP |
487 | /* |
488 | * .text section. Map to function alignment to avoid address changes | |
0f4c4af0 | 489 | * during second ld run in second ld pass when generating System.map |
cb87481e NP |
490 | * |
491 | * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead | |
492 | * code elimination is enabled, so these sections should be converted | |
493 | * to use ".." first. | |
494 | */ | |
7664709b SR |
495 | #define TEXT_TEXT \ |
496 | ALIGN_FUNCTION(); \ | |
cb87481e | 497 | *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \ |
564c9cc8 | 498 | *(.text..refcount) \ |
312b1485 | 499 | *(.ref.text) \ |
266ff2a8 NP |
500 | MEM_KEEP(init.text*) \ |
501 | MEM_KEEP(exit.text*) \ | |
eb8f6890 | 502 | |
7664709b | 503 | |
6d30e3a8 SR |
504 | /* sched.text is aling to function alignment to secure we have same |
505 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 506 | #define SCHED_TEXT \ |
6d30e3a8 | 507 | ALIGN_FUNCTION(); \ |
a6214385 | 508 | __sched_text_start = .; \ |
1da177e4 | 509 | *(.sched.text) \ |
a6214385 | 510 | __sched_text_end = .; |
1da177e4 | 511 | |
6d30e3a8 SR |
512 | /* spinlock.text is aling to function alignment to secure we have same |
513 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 514 | #define LOCK_TEXT \ |
6d30e3a8 | 515 | ALIGN_FUNCTION(); \ |
a6214385 | 516 | __lock_text_start = .; \ |
1da177e4 | 517 | *(.spinlock.text) \ |
a6214385 | 518 | __lock_text_end = .; |
d0aaff97 | 519 | |
6727ad9e CM |
520 | #define CPUIDLE_TEXT \ |
521 | ALIGN_FUNCTION(); \ | |
a6214385 | 522 | __cpuidle_text_start = .; \ |
6727ad9e | 523 | *(.cpuidle.text) \ |
a6214385 | 524 | __cpuidle_text_end = .; |
6727ad9e | 525 | |
d0aaff97 PP |
526 | #define KPROBES_TEXT \ |
527 | ALIGN_FUNCTION(); \ | |
a6214385 | 528 | __kprobes_text_start = .; \ |
d0aaff97 | 529 | *(.kprobes.text) \ |
a6214385 | 530 | __kprobes_text_end = .; |
a7d0c210 | 531 | |
ea714547 JO |
532 | #define ENTRY_TEXT \ |
533 | ALIGN_FUNCTION(); \ | |
a6214385 | 534 | __entry_text_start = .; \ |
ea714547 | 535 | *(.entry.text) \ |
a6214385 | 536 | __entry_text_end = .; |
ea714547 | 537 | |
a0343e82 FW |
538 | #define IRQENTRY_TEXT \ |
539 | ALIGN_FUNCTION(); \ | |
a6214385 | 540 | __irqentry_text_start = .; \ |
a0343e82 | 541 | *(.irqentry.text) \ |
a6214385 | 542 | __irqentry_text_end = .; |
a0343e82 | 543 | |
be7635e7 AP |
544 | #define SOFTIRQENTRY_TEXT \ |
545 | ALIGN_FUNCTION(); \ | |
a6214385 | 546 | __softirqentry_text_start = .; \ |
be7635e7 | 547 | *(.softirqentry.text) \ |
a6214385 | 548 | __softirqentry_text_end = .; |
be7635e7 | 549 | |
37c514e3 | 550 | /* Section used for early init (in .S files) */ |
266ff2a8 | 551 | #define HEAD_TEXT KEEP(*(.head.text)) |
37c514e3 | 552 | |
7923f90f | 553 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
554 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
555 | HEAD_TEXT \ | |
556 | } | |
557 | ||
558 | /* | |
559 | * Exception table | |
560 | */ | |
561 | #define EXCEPTION_TABLE(align) \ | |
562 | . = ALIGN(align); \ | |
563 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
a6214385 | 564 | __start___ex_table = .; \ |
4b89b7f7 | 565 | KEEP(*(__ex_table)) \ |
a6214385 | 566 | __stop___ex_table = .; \ |
ef53dae8 SR |
567 | } |
568 | ||
569 | /* | |
570 | * Init task | |
571 | */ | |
39a449d9 | 572 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 573 | . = ALIGN(align); \ |
da5e37ef | 574 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 575 | INIT_TASK_DATA(align) \ |
ef53dae8 | 576 | } |
37c514e3 | 577 | |
b99b87f7 | 578 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 | 579 | #define KERNEL_CTORS() . = ALIGN(8); \ |
a6214385 | 580 | __ctors_start = .; \ |
4b89b7f7 NP |
581 | KEEP(*(.ctors)) \ |
582 | KEEP(*(SORT(.init_array.*))) \ | |
583 | KEEP(*(.init_array)) \ | |
a6214385 | 584 | __ctors_end = .; |
b99b87f7 PO |
585 | #else |
586 | #define KERNEL_CTORS() | |
587 | #endif | |
588 | ||
01ba2bdc | 589 | /* init and exit section handling */ |
eb8f6890 | 590 | #define INIT_DATA \ |
b67067f1 | 591 | KEEP(*(SORT(___kentry+*))) \ |
266ff2a8 NP |
592 | *(.init.data init.data.*) \ |
593 | MEM_DISCARD(init.data*) \ | |
b99b87f7 | 594 | KERNEL_CTORS() \ |
4b3b4c5e | 595 | MCOUNT_REC() \ |
266ff2a8 | 596 | *(.init.rodata .init.rodata.*) \ |
e4a9ea5e | 597 | FTRACE_EVENTS() \ |
3d56e331 | 598 | TRACE_SYSCALLS() \ |
376e2424 | 599 | KPROBE_BLACKLIST() \ |
540adea3 | 600 | ERROR_INJECT_WHITELIST() \ |
aab94339 | 601 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 602 | CLK_OF_TABLES() \ |
f618c470 | 603 | RESERVEDMEM_OF_TABLES() \ |
2fcc112a | 604 | TIMER_OF_TABLES() \ |
6c3ff8b1 | 605 | CPU_METHOD_OF_TABLES() \ |
449e056c | 606 | CPUIDLE_METHOD_OF_TABLES() \ |
f6e916b8 | 607 | KERNEL_DTB() \ |
b0b6abd3 | 608 | IRQCHIP_OF_MATCH_TABLE() \ |
46e589a3 | 609 | ACPI_PROBE_TABLE(irqchip) \ |
2fcc112a | 610 | ACPI_PROBE_TABLE(timer) \ |
3ac946d1 KC |
611 | EARLYCON_TABLE() \ |
612 | LSM_TABLE() | |
eb8f6890 SR |
613 | |
614 | #define INIT_TEXT \ | |
266ff2a8 | 615 | *(.init.text .init.text.*) \ |
e41f501d | 616 | *(.text.startup) \ |
266ff2a8 | 617 | MEM_DISCARD(init.text*) |
eb8f6890 SR |
618 | |
619 | #define EXIT_DATA \ | |
266ff2a8 | 620 | *(.exit.data .exit.data.*) \ |
8dcf86ca PO |
621 | *(.fini_array .fini_array.*) \ |
622 | *(.dtors .dtors.*) \ | |
266ff2a8 NP |
623 | MEM_DISCARD(exit.data*) \ |
624 | MEM_DISCARD(exit.rodata*) | |
01ba2bdc | 625 | |
eb8f6890 SR |
626 | #define EXIT_TEXT \ |
627 | *(.exit.text) \ | |
e41f501d | 628 | *(.text.exit) \ |
eb8f6890 | 629 | MEM_DISCARD(exit.text) |
01ba2bdc | 630 | |
7923f90f SR |
631 | #define EXIT_CALL \ |
632 | *(.exitcall.exit) | |
633 | ||
ef53dae8 SR |
634 | /* |
635 | * bss (Block Started by Symbol) - uninitialized data | |
636 | * zeroed during startup | |
637 | */ | |
04e448d9 TA |
638 | #define SBSS(sbss_align) \ |
639 | . = ALIGN(sbss_align); \ | |
ef53dae8 | 640 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
83a092cf | 641 | *(.dynsbss) \ |
266ff2a8 | 642 | *(SBSS_MAIN) \ |
ef53dae8 SR |
643 | *(.scommon) \ |
644 | } | |
645 | ||
c87728ca DD |
646 | /* |
647 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
648 | * sections to the front of bss. | |
649 | */ | |
650 | #ifndef BSS_FIRST_SECTIONS | |
651 | #define BSS_FIRST_SECTIONS | |
652 | #endif | |
653 | ||
ef53dae8 SR |
654 | #define BSS(bss_align) \ |
655 | . = ALIGN(bss_align); \ | |
656 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 657 | BSS_FIRST_SECTIONS \ |
7c74df07 | 658 | *(.bss..page_aligned) \ |
ef53dae8 | 659 | *(.dynbss) \ |
cb87481e | 660 | *(BSS_MAIN) \ |
ef53dae8 | 661 | *(COMMON) \ |
ef53dae8 SR |
662 | } |
663 | ||
664 | /* | |
665 | * DWARF debug sections. | |
666 | * Symbols in the DWARF debugging sections are relative to | |
667 | * the beginning of the section so we begin them at 0. | |
668 | */ | |
a7d0c210 PBG |
669 | #define DWARF_DEBUG \ |
670 | /* DWARF 1 */ \ | |
671 | .debug 0 : { *(.debug) } \ | |
672 | .line 0 : { *(.line) } \ | |
673 | /* GNU DWARF 1 extensions */ \ | |
674 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
675 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
676 | /* DWARF 1.1 and DWARF 2 */ \ | |
677 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
678 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
679 | /* DWARF 2 */ \ | |
680 | .debug_info 0 : { *(.debug_info \ | |
681 | .gnu.linkonce.wi.*) } \ | |
682 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
683 | .debug_line 0 : { *(.debug_line) } \ | |
684 | .debug_frame 0 : { *(.debug_frame) } \ | |
685 | .debug_str 0 : { *(.debug_str) } \ | |
686 | .debug_loc 0 : { *(.debug_loc) } \ | |
687 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
83a092cf NP |
688 | .debug_pubtypes 0 : { *(.debug_pubtypes) } \ |
689 | /* DWARF 3 */ \ | |
690 | .debug_ranges 0 : { *(.debug_ranges) } \ | |
a7d0c210 PBG |
691 | /* SGI/MIPS DWARF 2 extensions */ \ |
692 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
693 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
694 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
695 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
83a092cf NP |
696 | /* GNU DWARF 2 extensions */ \ |
697 | .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ | |
698 | .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ | |
699 | /* DWARF 4 */ \ | |
700 | .debug_types 0 : { *(.debug_types) } \ | |
701 | /* DWARF 5 */ \ | |
702 | .debug_macro 0 : { *(.debug_macro) } \ | |
703 | .debug_addr 0 : { *(.debug_addr) } | |
a7d0c210 PBG |
704 | |
705 | /* Stabs debugging sections. */ | |
706 | #define STABS_DEBUG \ | |
707 | .stab 0 : { *(.stab) } \ | |
708 | .stabstr 0 : { *(.stabstr) } \ | |
709 | .stab.excl 0 : { *(.stab.excl) } \ | |
710 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
711 | .stab.index 0 : { *(.stab.index) } \ | |
712 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
713 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 714 | |
6360b1fb | 715 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
716 | #define BUG_TABLE \ |
717 | . = ALIGN(8); \ | |
718 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
a6214385 | 719 | __start___bug_table = .; \ |
4b89b7f7 | 720 | KEEP(*(__bug_table)) \ |
a6214385 | 721 | __stop___bug_table = .; \ |
7664c5a1 | 722 | } |
6360b1fb JB |
723 | #else |
724 | #define BUG_TABLE | |
725 | #endif | |
7664c5a1 | 726 | |
11af8474 | 727 | #ifdef CONFIG_UNWINDER_ORC |
ee9f8fce JP |
728 | #define ORC_UNWIND_TABLE \ |
729 | . = ALIGN(4); \ | |
730 | .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ | |
a6214385 | 731 | __start_orc_unwind_ip = .; \ |
ee9f8fce | 732 | KEEP(*(.orc_unwind_ip)) \ |
a6214385 | 733 | __stop_orc_unwind_ip = .; \ |
ee9f8fce | 734 | } \ |
f76a16ad | 735 | . = ALIGN(2); \ |
ee9f8fce | 736 | .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ |
a6214385 | 737 | __start_orc_unwind = .; \ |
ee9f8fce | 738 | KEEP(*(.orc_unwind)) \ |
a6214385 | 739 | __stop_orc_unwind = .; \ |
ee9f8fce JP |
740 | } \ |
741 | . = ALIGN(4); \ | |
742 | .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ | |
a6214385 | 743 | orc_lookup = .; \ |
ee9f8fce JP |
744 | . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \ |
745 | LOOKUP_BLOCK_SIZE) + 1) * 4; \ | |
a6214385 | 746 | orc_lookup_end = .; \ |
ee9f8fce JP |
747 | } |
748 | #else | |
749 | #define ORC_UNWIND_TABLE | |
750 | #endif | |
751 | ||
63687a52 JB |
752 | #ifdef CONFIG_PM_TRACE |
753 | #define TRACEDATA \ | |
754 | . = ALIGN(4); \ | |
755 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
a6214385 | 756 | __tracedata_start = .; \ |
4b89b7f7 | 757 | KEEP(*(.tracedata)) \ |
a6214385 | 758 | __tracedata_end = .; \ |
63687a52 JB |
759 | } |
760 | #else | |
761 | #define TRACEDATA | |
762 | #endif | |
763 | ||
9c9b8b38 | 764 | #define NOTES \ |
cbe87121 | 765 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
a6214385 | 766 | __start_notes = .; \ |
266ff2a8 | 767 | KEEP(*(.note.*)) \ |
a6214385 | 768 | __stop_notes = .; \ |
cbe87121 | 769 | } |
61ce1efe | 770 | |
ef53dae8 SR |
771 | #define INIT_SETUP(initsetup_align) \ |
772 | . = ALIGN(initsetup_align); \ | |
a6214385 | 773 | __setup_start = .; \ |
4b89b7f7 | 774 | KEEP(*(.init.setup)) \ |
a6214385 | 775 | __setup_end = .; |
ef53dae8 | 776 | |
026cee00 | 777 | #define INIT_CALLS_LEVEL(level) \ |
a6214385 | 778 | __initcall##level##_start = .; \ |
b67067f1 NP |
779 | KEEP(*(.initcall##level##.init)) \ |
780 | KEEP(*(.initcall##level##s.init)) \ | |
61ce1efe | 781 | |
ef53dae8 | 782 | #define INIT_CALLS \ |
a6214385 | 783 | __initcall_start = .; \ |
b67067f1 | 784 | KEEP(*(.initcallearly.init)) \ |
026cee00 PM |
785 | INIT_CALLS_LEVEL(0) \ |
786 | INIT_CALLS_LEVEL(1) \ | |
787 | INIT_CALLS_LEVEL(2) \ | |
788 | INIT_CALLS_LEVEL(3) \ | |
789 | INIT_CALLS_LEVEL(4) \ | |
790 | INIT_CALLS_LEVEL(5) \ | |
791 | INIT_CALLS_LEVEL(rootfs) \ | |
792 | INIT_CALLS_LEVEL(6) \ | |
793 | INIT_CALLS_LEVEL(7) \ | |
a6214385 | 794 | __initcall_end = .; |
ef53dae8 SR |
795 | |
796 | #define CON_INITCALL \ | |
a6214385 | 797 | __con_initcall_start = .; \ |
b67067f1 | 798 | KEEP(*(.con_initcall.init)) \ |
a6214385 | 799 | __con_initcall_end = .; |
ef53dae8 | 800 | |
ef53dae8 SR |
801 | #ifdef CONFIG_BLK_DEV_INITRD |
802 | #define INIT_RAM_FS \ | |
d8826262 | 803 | . = ALIGN(4); \ |
a6214385 | 804 | __initramfs_start = .; \ |
b67067f1 | 805 | KEEP(*(.init.ramfs)) \ |
ffe8018c | 806 | . = ALIGN(8); \ |
b67067f1 | 807 | KEEP(*(.init.ramfs.info)) |
ef53dae8 | 808 | #else |
eadfe219 | 809 | #define INIT_RAM_FS |
ef53dae8 SR |
810 | #endif |
811 | ||
ac26963a BS |
812 | /* |
813 | * Memory encryption operates on a page basis. Since we need to clear | |
814 | * the memory encryption mask for this section, it needs to be aligned | |
815 | * on a page boundary and be a page-size multiple in length. | |
816 | * | |
817 | * Note: We use a separate section so that only this section gets | |
818 | * decrypted to avoid exposing more than we wish. | |
819 | */ | |
820 | #ifdef CONFIG_AMD_MEM_ENCRYPT | |
821 | #define PERCPU_DECRYPTED_SECTION \ | |
822 | . = ALIGN(PAGE_SIZE); \ | |
823 | *(.data..percpu..decrypted) \ | |
824 | . = ALIGN(PAGE_SIZE); | |
825 | #else | |
826 | #define PERCPU_DECRYPTED_SECTION | |
827 | #endif | |
828 | ||
829 | ||
023bf6f1 TH |
830 | /* |
831 | * Default discarded sections. | |
832 | * | |
833 | * Some archs want to discard exit text/data at runtime rather than | |
834 | * link time due to cross-section references such as alt instructions, | |
835 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
836 | * section definitions so that such archs put those in earlier section | |
837 | * definitions. | |
838 | */ | |
405d967d TH |
839 | #define DISCARDS \ |
840 | /DISCARD/ : { \ | |
841 | EXIT_TEXT \ | |
842 | EXIT_DATA \ | |
023bf6f1 | 843 | EXIT_CALL \ |
405d967d | 844 | *(.discard) \ |
c7f52cdc | 845 | *(.discard.*) \ |
898490c0 | 846 | *(.modinfo) \ |
405d967d TH |
847 | } |
848 | ||
6ea0c34d MF |
849 | /** |
850 | * PERCPU_INPUT - the percpu input sections | |
851 | * @cacheline: cacheline size | |
852 | * | |
853 | * The core percpu section names and core symbols which do not rely | |
854 | * directly upon load addresses. | |
855 | * | |
856 | * @cacheline is used to align subsections to avoid false cacheline | |
857 | * sharing between subsections for different purposes. | |
858 | */ | |
859 | #define PERCPU_INPUT(cacheline) \ | |
a6214385 | 860 | __per_cpu_start = .; \ |
6ea0c34d MF |
861 | *(.data..percpu..first) \ |
862 | . = ALIGN(PAGE_SIZE); \ | |
863 | *(.data..percpu..page_aligned) \ | |
864 | . = ALIGN(cacheline); \ | |
330d2822 | 865 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
866 | . = ALIGN(cacheline); \ |
867 | *(.data..percpu) \ | |
868 | *(.data..percpu..shared_aligned) \ | |
ac26963a | 869 | PERCPU_DECRYPTED_SECTION \ |
a6214385 | 870 | __per_cpu_end = .; |
6ea0c34d | 871 | |
3e5d8f97 | 872 | /** |
6b7c38d5 | 873 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 874 | * @cacheline: cacheline size |
3e5d8f97 TH |
875 | * @vaddr: explicit base address (optional) |
876 | * @phdr: destination PHDR (optional) | |
877 | * | |
19df0c2f TH |
878 | * Macro which expands to output section for percpu area. |
879 | * | |
880 | * @cacheline is used to align subsections to avoid false cacheline | |
881 | * sharing between subsections for different purposes. | |
882 | * | |
883 | * If @vaddr is not blank, it specifies explicit base address and all | |
884 | * percpu symbols will be offset from the given address. If blank, | |
885 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
886 | * |
887 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
888 | * output PHDR is sticky. If @phdr is specified, the next output | |
889 | * section in the linker script will go there too. @phdr should have | |
890 | * a leading colon. | |
891 | * | |
3ac6cffe TH |
892 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
893 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 894 | * address, use PERCPU_SECTION. |
3e5d8f97 | 895 | */ |
19df0c2f | 896 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
a6214385 MY |
897 | __per_cpu_load = .; \ |
898 | .data..percpu vaddr : AT(__per_cpu_load - LOAD_OFFSET) { \ | |
6ea0c34d | 899 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 900 | } phdr \ |
a6214385 | 901 | . = __per_cpu_load + SIZEOF(.data..percpu); |
3e5d8f97 TH |
902 | |
903 | /** | |
0415b00d | 904 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 905 | * @cacheline: cacheline size |
3e5d8f97 | 906 | * |
0415b00d TH |
907 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
908 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 909 | * __per_cpu_start will be identical. |
3ac6cffe | 910 | * |
0415b00d | 911 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
912 | * except that __per_cpu_load is defined as a relative symbol against |
913 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 914 | */ |
0415b00d TH |
915 | #define PERCPU_SECTION(cacheline) \ |
916 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 917 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
a6214385 | 918 | __per_cpu_load = .; \ |
6ea0c34d | 919 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 920 | } |
ef53dae8 SR |
921 | |
922 | ||
923 | /* | |
924 | * Definition of the high level *_SECTION macros | |
925 | * They will fit only a subset of the architectures | |
926 | */ | |
927 | ||
928 | ||
929 | /* | |
930 | * Writeable data. | |
931 | * All sections are combined in a single .data section. | |
932 | * The sections following CONSTRUCTORS are arranged so their | |
933 | * typical alignment matches. | |
934 | * A cacheline is typical/always less than a PAGE_SIZE so | |
935 | * the sections that has this restriction (or similar) | |
936 | * is located before the ones requiring PAGE_SIZE alignment. | |
937 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 938 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 939 | * |
7923f90f | 940 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 941 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
942 | . = ALIGN(PAGE_SIZE); \ |
943 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 944 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
945 | NOSAVE_DATA \ |
946 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
947 | CACHELINE_ALIGNED_DATA(cacheline) \ |
948 | READ_MOSTLY_DATA(cacheline) \ | |
949 | DATA_DATA \ | |
950 | CONSTRUCTORS \ | |
19d43626 | 951 | } \ |
ee9f8fce | 952 | BUG_TABLE \ |
ef53dae8 SR |
953 | |
954 | #define INIT_TEXT_SECTION(inittext_align) \ | |
955 | . = ALIGN(inittext_align); \ | |
956 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
a6214385 | 957 | _sinittext = .; \ |
ef53dae8 | 958 | INIT_TEXT \ |
a6214385 | 959 | _einittext = .; \ |
ef53dae8 SR |
960 | } |
961 | ||
962 | #define INIT_DATA_SECTION(initsetup_align) \ | |
963 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
964 | INIT_DATA \ | |
965 | INIT_SETUP(initsetup_align) \ | |
966 | INIT_CALLS \ | |
967 | CON_INITCALL \ | |
ef53dae8 SR |
968 | INIT_RAM_FS \ |
969 | } | |
970 | ||
04e448d9 TA |
971 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
972 | . = ALIGN(sbss_align); \ | |
a6214385 | 973 | __bss_start = .; \ |
04e448d9 | 974 | SBSS(sbss_align) \ |
ef53dae8 | 975 | BSS(bss_align) \ |
04e448d9 | 976 | . = ALIGN(stop_align); \ |
a6214385 | 977 | __bss_stop = .; |