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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 | ||
b92021b0 | 57 | #include <linux/export.h> |
1da177e4 | 58 | |
6d30e3a8 SR |
59 | /* Align . to a 8 byte boundary equals to maximum function alignment. */ |
60 | #define ALIGN_FUNCTION() . = ALIGN(8) | |
61 | ||
cb87481e NP |
62 | /* |
63 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections, which | |
64 | * generates .data.identifier sections, which need to be pulled in with | |
65 | * .data. We don't want to pull in .data..other sections, which Linux | |
66 | * has defined. Same for text and bss. | |
67 | */ | |
68 | #ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION | |
69 | #define TEXT_MAIN .text .text.[0-9a-zA-Z_]* | |
70 | #define DATA_MAIN .data .data.[0-9a-zA-Z_]* | |
71 | #define BSS_MAIN .bss .bss.[0-9a-zA-Z_]* | |
72 | #else | |
73 | #define TEXT_MAIN .text | |
74 | #define DATA_MAIN .data | |
75 | #define BSS_MAIN .bss | |
76 | #endif | |
77 | ||
07fca0e5 SR |
78 | /* |
79 | * Align to a 32 byte boundary equal to the | |
80 | * alignment gcc 4.5 uses for a struct | |
81 | */ | |
aab94339 DB |
82 | #define STRUCT_ALIGNMENT 32 |
83 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 84 | |
eb8f6890 SR |
85 | /* The actual configuration determine if the init/exit sections |
86 | * are handled as text/data or they can be discarded (which | |
87 | * often happens at runtime) | |
88 | */ | |
eb8f6890 SR |
89 | #ifdef CONFIG_HOTPLUG_CPU |
90 | #define CPU_KEEP(sec) *(.cpu##sec) | |
91 | #define CPU_DISCARD(sec) | |
92 | #else | |
93 | #define CPU_KEEP(sec) | |
94 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
95 | #endif | |
96 | ||
1a3fb6d4 | 97 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
98 | #define MEM_KEEP(sec) *(.mem##sec) |
99 | #define MEM_DISCARD(sec) | |
100 | #else | |
101 | #define MEM_KEEP(sec) | |
102 | #define MEM_DISCARD(sec) *(.mem##sec) | |
103 | #endif | |
104 | ||
8da3821b | 105 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
106 | #define MCOUNT_REC() . = ALIGN(8); \ |
107 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
108 | *(__mcount_loc) \ |
109 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
110 | #else | |
111 | #define MCOUNT_REC() | |
112 | #endif | |
eb8f6890 | 113 | |
2ed84eeb | 114 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
115 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
116 | *(_ftrace_annotated_branch) \ | |
117 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
118 | #else |
119 | #define LIKELY_PROFILE() | |
120 | #endif | |
121 | ||
2bcd521a SR |
122 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
123 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
124 | *(_ftrace_branch) \ | |
125 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
126 | #else | |
127 | #define BRANCH_PROFILE() | |
128 | #endif | |
129 | ||
376e2424 | 130 | #ifdef CONFIG_KPROBES |
69902c71 VG |
131 | #define KPROBE_BLACKLIST() . = ALIGN(8); \ |
132 | VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \ | |
4b89b7f7 | 133 | KEEP(*(_kprobe_blacklist)) \ |
376e2424 MH |
134 | VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .; |
135 | #else | |
136 | #define KPROBE_BLACKLIST() | |
137 | #endif | |
138 | ||
5f77a88b | 139 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
140 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
141 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
4b89b7f7 | 142 | KEEP(*(_ftrace_events)) \ |
0c564a53 | 143 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; \ |
02fd7f68 JL |
144 | VMLINUX_SYMBOL(__start_ftrace_eval_maps) = .; \ |
145 | KEEP(*(_ftrace_eval_map)) \ | |
146 | VMLINUX_SYMBOL(__stop_ftrace_eval_maps) = .; | |
b77e38aa SR |
147 | #else |
148 | #define FTRACE_EVENTS() | |
149 | #endif | |
150 | ||
1ba28e02 LJ |
151 | #ifdef CONFIG_TRACING |
152 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
4b89b7f7 | 153 | KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ |
1ba28e02 | 154 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; |
102c9323 | 155 | #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ |
4b89b7f7 | 156 | KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ |
102c9323 | 157 | VMLINUX_SYMBOL(__stop___tracepoint_str) = .; |
1ba28e02 LJ |
158 | #else |
159 | #define TRACE_PRINTKS() | |
102c9323 | 160 | #define TRACEPOINT_STR() |
1ba28e02 LJ |
161 | #endif |
162 | ||
bed1ffca | 163 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
164 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
165 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
4b89b7f7 | 166 | KEEP(*(__syscalls_metadata)) \ |
bed1ffca FW |
167 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; |
168 | #else | |
169 | #define TRACE_SYSCALLS() | |
170 | #endif | |
171 | ||
470ca0de | 172 | #ifdef CONFIG_SERIAL_EARLYCON |
99492c39 | 173 | #define EARLYCON_TABLE() STRUCT_ALIGN(); \ |
470ca0de | 174 | VMLINUX_SYMBOL(__earlycon_table) = .; \ |
4b89b7f7 | 175 | KEEP(*(__earlycon_table)) \ |
2eaa7909 | 176 | VMLINUX_SYMBOL(__earlycon_table_end) = .; |
470ca0de PH |
177 | #else |
178 | #define EARLYCON_TABLE() | |
179 | #endif | |
aab94339 | 180 | |
06309288 RH |
181 | #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) |
182 | #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) | |
5ee02af1 | 183 | #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) |
06309288 RH |
184 | #define _OF_TABLE_0(name) |
185 | #define _OF_TABLE_1(name) \ | |
f6e916b8 | 186 | . = ALIGN(8); \ |
06309288 | 187 | VMLINUX_SYMBOL(__##name##_of_table) = .; \ |
4b89b7f7 NP |
188 | KEEP(*(__##name##_of_table)) \ |
189 | KEEP(*(__##name##_of_table_end)) | |
06309288 | 190 | |
bb0eb050 | 191 | #define TIMER_OF_TABLES() OF_TABLE(CONFIG_TIMER_OF, timer) |
06309288 RH |
192 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) |
193 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
1cd076bf | 194 | #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) |
06309288 RH |
195 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) |
196 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
449e056c | 197 | #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) |
6c3ff8b1 | 198 | |
e647b532 MZ |
199 | #ifdef CONFIG_ACPI |
200 | #define ACPI_PROBE_TABLE(name) \ | |
201 | . = ALIGN(8); \ | |
202 | VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \ | |
4b89b7f7 | 203 | KEEP(*(__##name##_acpi_probe_table)) \ |
e647b532 MZ |
204 | VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .; |
205 | #else | |
206 | #define ACPI_PROBE_TABLE(name) | |
207 | #endif | |
208 | ||
aab94339 DB |
209 | #define KERNEL_DTB() \ |
210 | STRUCT_ALIGN(); \ | |
211 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
4b89b7f7 | 212 | KEEP(*(.dtb.init.rodata)) \ |
aab94339 DB |
213 | VMLINUX_SYMBOL(__dtb_end) = .; |
214 | ||
b67067f1 NP |
215 | /* |
216 | * .data section | |
b67067f1 | 217 | */ |
ca967258 | 218 | #define DATA_DATA \ |
cb87481e | 219 | *(DATA_MAIN) \ |
312b1485 | 220 | *(.ref.data) \ |
d356c0b6 | 221 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
222 | MEM_KEEP(init.data) \ |
223 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 224 | *(.data.unlikely) \ |
65498646 | 225 | STRUCT_ALIGN(); \ |
97e1c18e | 226 | *(__tracepoints) \ |
e9d376f0 | 227 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
228 | . = ALIGN(8); \ |
229 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
4b89b7f7 | 230 | KEEP(*(__jump_table)) \ |
d430d3d7 | 231 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ |
e9d376f0 JB |
232 | . = ALIGN(8); \ |
233 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
4b89b7f7 | 234 | KEEP(*(__verbose)) \ |
e9d376f0 | 235 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
2bcd521a | 236 | LIKELY_PROFILE() \ |
b77e38aa | 237 | BRANCH_PROFILE() \ |
102c9323 SRRH |
238 | TRACE_PRINTKS() \ |
239 | TRACEPOINT_STR() | |
ca967258 | 240 | |
ef53dae8 SR |
241 | /* |
242 | * Data section helpers | |
243 | */ | |
244 | #define NOSAVE_DATA \ | |
245 | . = ALIGN(PAGE_SIZE); \ | |
246 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 247 | *(.data..nosave) \ |
ef53dae8 SR |
248 | . = ALIGN(PAGE_SIZE); \ |
249 | VMLINUX_SYMBOL(__nosave_end) = .; | |
250 | ||
251 | #define PAGE_ALIGNED_DATA(page_align) \ | |
252 | . = ALIGN(page_align); \ | |
75b13483 | 253 | *(.data..page_aligned) |
ef53dae8 SR |
254 | |
255 | #define READ_MOSTLY_DATA(align) \ | |
256 | . = ALIGN(align); \ | |
8369744f SL |
257 | *(.data..read_mostly) \ |
258 | . = ALIGN(align); | |
ef53dae8 SR |
259 | |
260 | #define CACHELINE_ALIGNED_DATA(align) \ | |
261 | . = ALIGN(align); \ | |
4af57b78 | 262 | *(.data..cacheline_aligned) |
ef53dae8 | 263 | |
39a449d9 | 264 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 265 | . = ALIGN(align); \ |
91ed140d BP |
266 | VMLINUX_SYMBOL(__start_init_task) = .; \ |
267 | *(.data..init_task) \ | |
268 | VMLINUX_SYMBOL(__end_init_task) = .; | |
ef53dae8 | 269 | |
32fb2fc5 HC |
270 | /* |
271 | * Allow architectures to handle ro_after_init data on their | |
272 | * own by defining an empty RO_AFTER_INIT_DATA. | |
273 | */ | |
274 | #ifndef RO_AFTER_INIT_DATA | |
d7c19b06 | 275 | #define RO_AFTER_INIT_DATA \ |
d79bf21e | 276 | VMLINUX_SYMBOL(__start_ro_after_init) = .; \ |
d7c19b06 | 277 | *(.data..ro_after_init) \ |
d79bf21e | 278 | VMLINUX_SYMBOL(__end_ro_after_init) = .; |
32fb2fc5 HC |
279 | #endif |
280 | ||
ef53dae8 SR |
281 | /* |
282 | * Read only Data | |
283 | */ | |
284 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 285 | . = ALIGN((align)); \ |
1da177e4 | 286 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 287 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 | 288 | *(.rodata) *(.rodata.*) \ |
32fb2fc5 | 289 | RO_AFTER_INIT_DATA /* Read only after init */ \ |
4b89b7f7 | 290 | KEEP(*(__vermagic)) /* Kernel version magic */ \ |
65498646 MD |
291 | . = ALIGN(8); \ |
292 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
4b89b7f7 | 293 | KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ |
65498646 | 294 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ |
97e1c18e | 295 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
296 | } \ |
297 | \ | |
298 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
299 | *(.rodata1) \ | |
300 | } \ | |
301 | \ | |
302 | /* PCI quirks */ \ | |
303 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
304 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
4b89b7f7 | 305 | KEEP(*(.pci_fixup_early)) \ |
1da177e4 LT |
306 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
307 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
4b89b7f7 | 308 | KEEP(*(.pci_fixup_header)) \ |
1da177e4 LT |
309 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
310 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
4b89b7f7 | 311 | KEEP(*(.pci_fixup_final)) \ |
1da177e4 LT |
312 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
313 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
4b89b7f7 | 314 | KEEP(*(.pci_fixup_enable)) \ |
1da177e4 | 315 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
1597cacb | 316 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
4b89b7f7 | 317 | KEEP(*(.pci_fixup_resume)) \ |
1597cacb | 318 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
e1a2a51e | 319 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
4b89b7f7 | 320 | KEEP(*(.pci_fixup_resume_early)) \ |
e1a2a51e RW |
321 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
322 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
4b89b7f7 | 323 | KEEP(*(.pci_fixup_suspend)) \ |
e1a2a51e | 324 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
7d2a01b8 | 325 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
4b89b7f7 | 326 | KEEP(*(.pci_fixup_suspend_late)) \ |
7d2a01b8 | 327 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ |
1da177e4 LT |
328 | } \ |
329 | \ | |
5658c769 DW |
330 | /* Built-in firmware blobs */ \ |
331 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
332 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
4b89b7f7 | 333 | KEEP(*(.builtin_fw)) \ |
5658c769 DW |
334 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
335 | } \ | |
336 | \ | |
63687a52 JB |
337 | TRACEDATA \ |
338 | \ | |
1da177e4 LT |
339 | /* Kernel symbol table: Normal symbols */ \ |
340 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
341 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
b67067f1 | 342 | KEEP(*(SORT(___ksymtab+*))) \ |
1da177e4 LT |
343 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
344 | } \ | |
345 | \ | |
346 | /* Kernel symbol table: GPL-only symbols */ \ | |
347 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
348 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
b67067f1 | 349 | KEEP(*(SORT(___ksymtab_gpl+*))) \ |
1da177e4 LT |
350 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
351 | } \ | |
352 | \ | |
f71d20e9 AV |
353 | /* Kernel symbol table: Normal unused symbols */ \ |
354 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
355 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
b67067f1 | 356 | KEEP(*(SORT(___ksymtab_unused+*))) \ |
f71d20e9 AV |
357 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
358 | } \ | |
359 | \ | |
360 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
361 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
362 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
b67067f1 | 363 | KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ |
f71d20e9 AV |
364 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
365 | } \ | |
366 | \ | |
9f28bb7e GKH |
367 | /* Kernel symbol table: GPL-future-only symbols */ \ |
368 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
369 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
b67067f1 | 370 | KEEP(*(SORT(___ksymtab_gpl_future+*))) \ |
9f28bb7e GKH |
371 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
372 | } \ | |
373 | \ | |
1da177e4 LT |
374 | /* Kernel symbol table: Normal symbols */ \ |
375 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
376 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
b67067f1 | 377 | KEEP(*(SORT(___kcrctab+*))) \ |
1da177e4 LT |
378 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
379 | } \ | |
380 | \ | |
381 | /* Kernel symbol table: GPL-only symbols */ \ | |
382 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
383 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
b67067f1 | 384 | KEEP(*(SORT(___kcrctab_gpl+*))) \ |
1da177e4 LT |
385 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
386 | } \ | |
387 | \ | |
f71d20e9 AV |
388 | /* Kernel symbol table: Normal unused symbols */ \ |
389 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
390 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
b67067f1 | 391 | KEEP(*(SORT(___kcrctab_unused+*))) \ |
f71d20e9 AV |
392 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
393 | } \ | |
394 | \ | |
395 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
396 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
397 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
b67067f1 | 398 | KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ |
f71d20e9 AV |
399 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
400 | } \ | |
401 | \ | |
9f28bb7e GKH |
402 | /* Kernel symbol table: GPL-future-only symbols */ \ |
403 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
404 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
b67067f1 | 405 | KEEP(*(SORT(___kcrctab_gpl_future+*))) \ |
9f28bb7e GKH |
406 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
407 | } \ | |
408 | \ | |
1da177e4 LT |
409 | /* Kernel symbol table: strings */ \ |
410 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
4b89b7f7 | 411 | *(__ksymtab_strings) \ |
1da177e4 LT |
412 | } \ |
413 | \ | |
eb8f6890 SR |
414 | /* __*init sections */ \ |
415 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 416 | *(.ref.rodata) \ |
eb8f6890 SR |
417 | MEM_KEEP(init.rodata) \ |
418 | MEM_KEEP(exit.rodata) \ | |
419 | } \ | |
420 | \ | |
1da177e4 LT |
421 | /* Built-in module parameters. */ \ |
422 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
423 | VMLINUX_SYMBOL(__start___param) = .; \ | |
4b89b7f7 | 424 | KEEP(*(__param)) \ |
1da177e4 | 425 | VMLINUX_SYMBOL(__stop___param) = .; \ |
e94965ed DT |
426 | } \ |
427 | \ | |
428 | /* Built-in module versions. */ \ | |
429 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
430 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
4b89b7f7 | 431 | KEEP(*(__modver)) \ |
e94965ed | 432 | VMLINUX_SYMBOL(__stop___modver) = .; \ |
edeed305 | 433 | . = ALIGN((align)); \ |
6569580d | 434 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 435 | } \ |
4096b46f SR |
436 | . = ALIGN((align)); |
437 | ||
ef53dae8 | 438 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 439 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
440 | #define RODATA RO_DATA_SECTION(4096) |
441 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
442 | |
443 | #define SECURITY_INIT \ | |
60bad7fa | 444 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 | 445 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
b67067f1 | 446 | KEEP(*(.security_initcall.init)) \ |
1da177e4 LT |
447 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
448 | } | |
449 | ||
cb87481e NP |
450 | /* |
451 | * .text section. Map to function alignment to avoid address changes | |
0f4c4af0 | 452 | * during second ld run in second ld pass when generating System.map |
cb87481e NP |
453 | * |
454 | * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead | |
455 | * code elimination is enabled, so these sections should be converted | |
456 | * to use ".." first. | |
457 | */ | |
7664709b SR |
458 | #define TEXT_TEXT \ |
459 | ALIGN_FUNCTION(); \ | |
cb87481e | 460 | *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \ |
312b1485 | 461 | *(.ref.text) \ |
eb8f6890 | 462 | MEM_KEEP(init.text) \ |
fb5e2b37 | 463 | MEM_KEEP(exit.text) \ |
eb8f6890 | 464 | |
7664709b | 465 | |
6d30e3a8 SR |
466 | /* sched.text is aling to function alignment to secure we have same |
467 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 468 | #define SCHED_TEXT \ |
6d30e3a8 | 469 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
470 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
471 | *(.sched.text) \ | |
472 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
473 | ||
6d30e3a8 SR |
474 | /* spinlock.text is aling to function alignment to secure we have same |
475 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 476 | #define LOCK_TEXT \ |
6d30e3a8 | 477 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
478 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
479 | *(.spinlock.text) \ | |
480 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 | 481 | |
6727ad9e CM |
482 | #define CPUIDLE_TEXT \ |
483 | ALIGN_FUNCTION(); \ | |
484 | VMLINUX_SYMBOL(__cpuidle_text_start) = .; \ | |
485 | *(.cpuidle.text) \ | |
486 | VMLINUX_SYMBOL(__cpuidle_text_end) = .; | |
487 | ||
d0aaff97 PP |
488 | #define KPROBES_TEXT \ |
489 | ALIGN_FUNCTION(); \ | |
490 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
491 | *(.kprobes.text) \ | |
492 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 493 | |
ea714547 JO |
494 | #define ENTRY_TEXT \ |
495 | ALIGN_FUNCTION(); \ | |
496 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
497 | *(.entry.text) \ | |
498 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
499 | ||
be7635e7 | 500 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
a0343e82 FW |
501 | #define IRQENTRY_TEXT \ |
502 | ALIGN_FUNCTION(); \ | |
503 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
504 | *(.irqentry.text) \ | |
505 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
506 | #else | |
507 | #define IRQENTRY_TEXT | |
508 | #endif | |
509 | ||
be7635e7 AP |
510 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
511 | #define SOFTIRQENTRY_TEXT \ | |
512 | ALIGN_FUNCTION(); \ | |
513 | VMLINUX_SYMBOL(__softirqentry_text_start) = .; \ | |
514 | *(.softirqentry.text) \ | |
515 | VMLINUX_SYMBOL(__softirqentry_text_end) = .; | |
516 | #else | |
517 | #define SOFTIRQENTRY_TEXT | |
518 | #endif | |
519 | ||
37c514e3 | 520 | /* Section used for early init (in .S files) */ |
7923f90f | 521 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 522 | |
7923f90f | 523 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
524 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
525 | HEAD_TEXT \ | |
526 | } | |
527 | ||
528 | /* | |
529 | * Exception table | |
530 | */ | |
531 | #define EXCEPTION_TABLE(align) \ | |
532 | . = ALIGN(align); \ | |
533 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
534 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
4b89b7f7 | 535 | KEEP(*(__ex_table)) \ |
ef53dae8 SR |
536 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
537 | } | |
538 | ||
539 | /* | |
540 | * Init task | |
541 | */ | |
39a449d9 | 542 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 543 | . = ALIGN(align); \ |
da5e37ef | 544 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 545 | INIT_TASK_DATA(align) \ |
ef53dae8 | 546 | } |
37c514e3 | 547 | |
b99b87f7 | 548 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
549 | #define KERNEL_CTORS() . = ALIGN(8); \ |
550 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
4b89b7f7 NP |
551 | KEEP(*(.ctors)) \ |
552 | KEEP(*(SORT(.init_array.*))) \ | |
553 | KEEP(*(.init_array)) \ | |
b99b87f7 PO |
554 | VMLINUX_SYMBOL(__ctors_end) = .; |
555 | #else | |
556 | #define KERNEL_CTORS() | |
557 | #endif | |
558 | ||
01ba2bdc | 559 | /* init and exit section handling */ |
eb8f6890 | 560 | #define INIT_DATA \ |
b67067f1 | 561 | KEEP(*(SORT(___kentry+*))) \ |
eb8f6890 | 562 | *(.init.data) \ |
eb8f6890 | 563 | MEM_DISCARD(init.data) \ |
b99b87f7 | 564 | KERNEL_CTORS() \ |
4b3b4c5e | 565 | MCOUNT_REC() \ |
9fd49328 | 566 | *(.init.rodata) \ |
e4a9ea5e | 567 | FTRACE_EVENTS() \ |
3d56e331 | 568 | TRACE_SYSCALLS() \ |
376e2424 | 569 | KPROBE_BLACKLIST() \ |
aab94339 | 570 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 571 | CLK_OF_TABLES() \ |
f618c470 | 572 | RESERVEDMEM_OF_TABLES() \ |
2fcc112a | 573 | TIMER_OF_TABLES() \ |
1cd076bf | 574 | IOMMU_OF_TABLES() \ |
6c3ff8b1 | 575 | CPU_METHOD_OF_TABLES() \ |
449e056c | 576 | CPUIDLE_METHOD_OF_TABLES() \ |
f6e916b8 | 577 | KERNEL_DTB() \ |
b0b6abd3 | 578 | IRQCHIP_OF_MATCH_TABLE() \ |
46e589a3 | 579 | ACPI_PROBE_TABLE(irqchip) \ |
2fcc112a DL |
580 | ACPI_PROBE_TABLE(timer) \ |
581 | ACPI_PROBE_TABLE(iort) \ | |
2eaa7909 | 582 | EARLYCON_TABLE() |
eb8f6890 SR |
583 | |
584 | #define INIT_TEXT \ | |
585 | *(.init.text) \ | |
e41f501d | 586 | *(.text.startup) \ |
eb8f6890 SR |
587 | MEM_DISCARD(init.text) |
588 | ||
589 | #define EXIT_DATA \ | |
590 | *(.exit.data) \ | |
e41f501d DV |
591 | *(.fini_array) \ |
592 | *(.dtors) \ | |
eb8f6890 SR |
593 | MEM_DISCARD(exit.data) \ |
594 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 595 | |
eb8f6890 SR |
596 | #define EXIT_TEXT \ |
597 | *(.exit.text) \ | |
e41f501d | 598 | *(.text.exit) \ |
eb8f6890 | 599 | MEM_DISCARD(exit.text) |
01ba2bdc | 600 | |
7923f90f SR |
601 | #define EXIT_CALL \ |
602 | *(.exitcall.exit) | |
603 | ||
ef53dae8 SR |
604 | /* |
605 | * bss (Block Started by Symbol) - uninitialized data | |
606 | * zeroed during startup | |
607 | */ | |
04e448d9 TA |
608 | #define SBSS(sbss_align) \ |
609 | . = ALIGN(sbss_align); \ | |
ef53dae8 | 610 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
83a092cf | 611 | *(.dynsbss) \ |
ef53dae8 SR |
612 | *(.sbss) \ |
613 | *(.scommon) \ | |
614 | } | |
615 | ||
c87728ca DD |
616 | /* |
617 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
618 | * sections to the front of bss. | |
619 | */ | |
620 | #ifndef BSS_FIRST_SECTIONS | |
621 | #define BSS_FIRST_SECTIONS | |
622 | #endif | |
623 | ||
ef53dae8 SR |
624 | #define BSS(bss_align) \ |
625 | . = ALIGN(bss_align); \ | |
626 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 627 | BSS_FIRST_SECTIONS \ |
7c74df07 | 628 | *(.bss..page_aligned) \ |
ef53dae8 | 629 | *(.dynbss) \ |
cb87481e | 630 | *(BSS_MAIN) \ |
ef53dae8 | 631 | *(COMMON) \ |
ef53dae8 SR |
632 | } |
633 | ||
634 | /* | |
635 | * DWARF debug sections. | |
636 | * Symbols in the DWARF debugging sections are relative to | |
637 | * the beginning of the section so we begin them at 0. | |
638 | */ | |
a7d0c210 PBG |
639 | #define DWARF_DEBUG \ |
640 | /* DWARF 1 */ \ | |
641 | .debug 0 : { *(.debug) } \ | |
642 | .line 0 : { *(.line) } \ | |
643 | /* GNU DWARF 1 extensions */ \ | |
644 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
645 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
646 | /* DWARF 1.1 and DWARF 2 */ \ | |
647 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
648 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
649 | /* DWARF 2 */ \ | |
650 | .debug_info 0 : { *(.debug_info \ | |
651 | .gnu.linkonce.wi.*) } \ | |
652 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
653 | .debug_line 0 : { *(.debug_line) } \ | |
654 | .debug_frame 0 : { *(.debug_frame) } \ | |
655 | .debug_str 0 : { *(.debug_str) } \ | |
656 | .debug_loc 0 : { *(.debug_loc) } \ | |
657 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
83a092cf NP |
658 | .debug_pubtypes 0 : { *(.debug_pubtypes) } \ |
659 | /* DWARF 3 */ \ | |
660 | .debug_ranges 0 : { *(.debug_ranges) } \ | |
a7d0c210 PBG |
661 | /* SGI/MIPS DWARF 2 extensions */ \ |
662 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
663 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
664 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
665 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
83a092cf NP |
666 | /* GNU DWARF 2 extensions */ \ |
667 | .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ | |
668 | .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ | |
669 | /* DWARF 4 */ \ | |
670 | .debug_types 0 : { *(.debug_types) } \ | |
671 | /* DWARF 5 */ \ | |
672 | .debug_macro 0 : { *(.debug_macro) } \ | |
673 | .debug_addr 0 : { *(.debug_addr) } | |
a7d0c210 PBG |
674 | |
675 | /* Stabs debugging sections. */ | |
676 | #define STABS_DEBUG \ | |
677 | .stab 0 : { *(.stab) } \ | |
678 | .stabstr 0 : { *(.stabstr) } \ | |
679 | .stab.excl 0 : { *(.stab.excl) } \ | |
680 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
681 | .stab.index 0 : { *(.stab.index) } \ | |
682 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
683 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 684 | |
6360b1fb | 685 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
686 | #define BUG_TABLE \ |
687 | . = ALIGN(8); \ | |
688 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 689 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
4b89b7f7 | 690 | KEEP(*(__bug_table)) \ |
c6de0026 | 691 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 692 | } |
6360b1fb JB |
693 | #else |
694 | #define BUG_TABLE | |
695 | #endif | |
7664c5a1 | 696 | |
63687a52 JB |
697 | #ifdef CONFIG_PM_TRACE |
698 | #define TRACEDATA \ | |
699 | . = ALIGN(4); \ | |
700 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 701 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
4b89b7f7 | 702 | KEEP(*(.tracedata)) \ |
c6de0026 | 703 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
704 | } |
705 | #else | |
706 | #define TRACEDATA | |
707 | #endif | |
708 | ||
9c9b8b38 | 709 | #define NOTES \ |
cbe87121 RM |
710 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
711 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
712 | *(.note.*) \ | |
713 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
714 | } | |
61ce1efe | 715 | |
ef53dae8 SR |
716 | #define INIT_SETUP(initsetup_align) \ |
717 | . = ALIGN(initsetup_align); \ | |
718 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
4b89b7f7 | 719 | KEEP(*(.init.setup)) \ |
ef53dae8 SR |
720 | VMLINUX_SYMBOL(__setup_end) = .; |
721 | ||
026cee00 PM |
722 | #define INIT_CALLS_LEVEL(level) \ |
723 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
b67067f1 NP |
724 | KEEP(*(.initcall##level##.init)) \ |
725 | KEEP(*(.initcall##level##s.init)) \ | |
61ce1efe | 726 | |
ef53dae8 SR |
727 | #define INIT_CALLS \ |
728 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
b67067f1 | 729 | KEEP(*(.initcallearly.init)) \ |
026cee00 PM |
730 | INIT_CALLS_LEVEL(0) \ |
731 | INIT_CALLS_LEVEL(1) \ | |
732 | INIT_CALLS_LEVEL(2) \ | |
733 | INIT_CALLS_LEVEL(3) \ | |
734 | INIT_CALLS_LEVEL(4) \ | |
735 | INIT_CALLS_LEVEL(5) \ | |
736 | INIT_CALLS_LEVEL(rootfs) \ | |
737 | INIT_CALLS_LEVEL(6) \ | |
738 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
739 | VMLINUX_SYMBOL(__initcall_end) = .; |
740 | ||
741 | #define CON_INITCALL \ | |
742 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
b67067f1 | 743 | KEEP(*(.con_initcall.init)) \ |
ef53dae8 SR |
744 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
745 | ||
746 | #define SECURITY_INITCALL \ | |
747 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
b67067f1 | 748 | KEEP(*(.security_initcall.init)) \ |
ef53dae8 SR |
749 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
750 | ||
751 | #ifdef CONFIG_BLK_DEV_INITRD | |
752 | #define INIT_RAM_FS \ | |
d8826262 | 753 | . = ALIGN(4); \ |
ef53dae8 | 754 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
b67067f1 | 755 | KEEP(*(.init.ramfs)) \ |
ffe8018c | 756 | . = ALIGN(8); \ |
b67067f1 | 757 | KEEP(*(.init.ramfs.info)) |
ef53dae8 | 758 | #else |
eadfe219 | 759 | #define INIT_RAM_FS |
ef53dae8 SR |
760 | #endif |
761 | ||
023bf6f1 TH |
762 | /* |
763 | * Default discarded sections. | |
764 | * | |
765 | * Some archs want to discard exit text/data at runtime rather than | |
766 | * link time due to cross-section references such as alt instructions, | |
767 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
768 | * section definitions so that such archs put those in earlier section | |
769 | * definitions. | |
770 | */ | |
405d967d TH |
771 | #define DISCARDS \ |
772 | /DISCARD/ : { \ | |
773 | EXIT_TEXT \ | |
774 | EXIT_DATA \ | |
023bf6f1 | 775 | EXIT_CALL \ |
405d967d | 776 | *(.discard) \ |
c7f52cdc | 777 | *(.discard.*) \ |
405d967d TH |
778 | } |
779 | ||
6ea0c34d MF |
780 | /** |
781 | * PERCPU_INPUT - the percpu input sections | |
782 | * @cacheline: cacheline size | |
783 | * | |
784 | * The core percpu section names and core symbols which do not rely | |
785 | * directly upon load addresses. | |
786 | * | |
787 | * @cacheline is used to align subsections to avoid false cacheline | |
788 | * sharing between subsections for different purposes. | |
789 | */ | |
790 | #define PERCPU_INPUT(cacheline) \ | |
791 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
792 | *(.data..percpu..first) \ | |
793 | . = ALIGN(PAGE_SIZE); \ | |
794 | *(.data..percpu..page_aligned) \ | |
795 | . = ALIGN(cacheline); \ | |
330d2822 | 796 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
797 | . = ALIGN(cacheline); \ |
798 | *(.data..percpu) \ | |
799 | *(.data..percpu..shared_aligned) \ | |
800 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
801 | ||
3e5d8f97 | 802 | /** |
6b7c38d5 | 803 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 804 | * @cacheline: cacheline size |
3e5d8f97 TH |
805 | * @vaddr: explicit base address (optional) |
806 | * @phdr: destination PHDR (optional) | |
807 | * | |
19df0c2f TH |
808 | * Macro which expands to output section for percpu area. |
809 | * | |
810 | * @cacheline is used to align subsections to avoid false cacheline | |
811 | * sharing between subsections for different purposes. | |
812 | * | |
813 | * If @vaddr is not blank, it specifies explicit base address and all | |
814 | * percpu symbols will be offset from the given address. If blank, | |
815 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
816 | * |
817 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
818 | * output PHDR is sticky. If @phdr is specified, the next output | |
819 | * section in the linker script will go there too. @phdr should have | |
820 | * a leading colon. | |
821 | * | |
3ac6cffe TH |
822 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
823 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 824 | * address, use PERCPU_SECTION. |
3e5d8f97 | 825 | */ |
19df0c2f | 826 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 827 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 828 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 829 | - LOAD_OFFSET) { \ |
6ea0c34d | 830 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 831 | } phdr \ |
3d9a854c | 832 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
833 | |
834 | /** | |
0415b00d | 835 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 836 | * @cacheline: cacheline size |
3e5d8f97 | 837 | * |
0415b00d TH |
838 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
839 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 840 | * __per_cpu_start will be identical. |
3ac6cffe | 841 | * |
0415b00d | 842 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
843 | * except that __per_cpu_load is defined as a relative symbol against |
844 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 845 | */ |
0415b00d TH |
846 | #define PERCPU_SECTION(cacheline) \ |
847 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 848 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 849 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 850 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 851 | } |
ef53dae8 SR |
852 | |
853 | ||
854 | /* | |
855 | * Definition of the high level *_SECTION macros | |
856 | * They will fit only a subset of the architectures | |
857 | */ | |
858 | ||
859 | ||
860 | /* | |
861 | * Writeable data. | |
862 | * All sections are combined in a single .data section. | |
863 | * The sections following CONSTRUCTORS are arranged so their | |
864 | * typical alignment matches. | |
865 | * A cacheline is typical/always less than a PAGE_SIZE so | |
866 | * the sections that has this restriction (or similar) | |
867 | * is located before the ones requiring PAGE_SIZE alignment. | |
868 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 869 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 870 | * |
7923f90f | 871 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 872 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
873 | . = ALIGN(PAGE_SIZE); \ |
874 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 875 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
876 | NOSAVE_DATA \ |
877 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
878 | CACHELINE_ALIGNED_DATA(cacheline) \ |
879 | READ_MOSTLY_DATA(cacheline) \ | |
880 | DATA_DATA \ | |
881 | CONSTRUCTORS \ | |
19d43626 PZ |
882 | } \ |
883 | BUG_TABLE | |
ef53dae8 SR |
884 | |
885 | #define INIT_TEXT_SECTION(inittext_align) \ | |
886 | . = ALIGN(inittext_align); \ | |
887 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
888 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
889 | INIT_TEXT \ | |
890 | VMLINUX_SYMBOL(_einittext) = .; \ | |
891 | } | |
892 | ||
893 | #define INIT_DATA_SECTION(initsetup_align) \ | |
894 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
895 | INIT_DATA \ | |
896 | INIT_SETUP(initsetup_align) \ | |
897 | INIT_CALLS \ | |
898 | CON_INITCALL \ | |
899 | SECURITY_INITCALL \ | |
900 | INIT_RAM_FS \ | |
901 | } | |
902 | ||
04e448d9 TA |
903 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
904 | . = ALIGN(sbss_align); \ | |
905 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
906 | SBSS(sbss_align) \ | |
ef53dae8 | 907 | BSS(bss_align) \ |
04e448d9 TA |
908 | . = ALIGN(stop_align); \ |
909 | VMLINUX_SYMBOL(__bss_stop) = .; |