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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 \ |
129f6c48 | 219 | *(.xiptext) \ |
cb87481e | 220 | *(DATA_MAIN) \ |
312b1485 | 221 | *(.ref.data) \ |
d356c0b6 | 222 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
223 | MEM_KEEP(init.data) \ |
224 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 225 | *(.data.unlikely) \ |
65498646 | 226 | STRUCT_ALIGN(); \ |
97e1c18e | 227 | *(__tracepoints) \ |
e9d376f0 | 228 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
229 | . = ALIGN(8); \ |
230 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
4b89b7f7 | 231 | KEEP(*(__jump_table)) \ |
d430d3d7 | 232 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ |
e9d376f0 JB |
233 | . = ALIGN(8); \ |
234 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
4b89b7f7 | 235 | KEEP(*(__verbose)) \ |
e9d376f0 | 236 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
2bcd521a | 237 | LIKELY_PROFILE() \ |
b77e38aa | 238 | BRANCH_PROFILE() \ |
102c9323 SRRH |
239 | TRACE_PRINTKS() \ |
240 | TRACEPOINT_STR() | |
ca967258 | 241 | |
ef53dae8 SR |
242 | /* |
243 | * Data section helpers | |
244 | */ | |
245 | #define NOSAVE_DATA \ | |
246 | . = ALIGN(PAGE_SIZE); \ | |
247 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 248 | *(.data..nosave) \ |
ef53dae8 SR |
249 | . = ALIGN(PAGE_SIZE); \ |
250 | VMLINUX_SYMBOL(__nosave_end) = .; | |
251 | ||
252 | #define PAGE_ALIGNED_DATA(page_align) \ | |
253 | . = ALIGN(page_align); \ | |
75b13483 | 254 | *(.data..page_aligned) |
ef53dae8 SR |
255 | |
256 | #define READ_MOSTLY_DATA(align) \ | |
257 | . = ALIGN(align); \ | |
8369744f SL |
258 | *(.data..read_mostly) \ |
259 | . = ALIGN(align); | |
ef53dae8 SR |
260 | |
261 | #define CACHELINE_ALIGNED_DATA(align) \ | |
262 | . = ALIGN(align); \ | |
4af57b78 | 263 | *(.data..cacheline_aligned) |
ef53dae8 | 264 | |
39a449d9 | 265 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 266 | . = ALIGN(align); \ |
91ed140d BP |
267 | VMLINUX_SYMBOL(__start_init_task) = .; \ |
268 | *(.data..init_task) \ | |
269 | VMLINUX_SYMBOL(__end_init_task) = .; | |
ef53dae8 | 270 | |
32fb2fc5 HC |
271 | /* |
272 | * Allow architectures to handle ro_after_init data on their | |
273 | * own by defining an empty RO_AFTER_INIT_DATA. | |
274 | */ | |
275 | #ifndef RO_AFTER_INIT_DATA | |
d7c19b06 | 276 | #define RO_AFTER_INIT_DATA \ |
d79bf21e | 277 | VMLINUX_SYMBOL(__start_ro_after_init) = .; \ |
d7c19b06 | 278 | *(.data..ro_after_init) \ |
d79bf21e | 279 | VMLINUX_SYMBOL(__end_ro_after_init) = .; |
32fb2fc5 HC |
280 | #endif |
281 | ||
ef53dae8 SR |
282 | /* |
283 | * Read only Data | |
284 | */ | |
285 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 286 | . = ALIGN((align)); \ |
1da177e4 | 287 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 288 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 | 289 | *(.rodata) *(.rodata.*) \ |
32fb2fc5 | 290 | RO_AFTER_INIT_DATA /* Read only after init */ \ |
4b89b7f7 | 291 | KEEP(*(__vermagic)) /* Kernel version magic */ \ |
65498646 MD |
292 | . = ALIGN(8); \ |
293 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
4b89b7f7 | 294 | KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ |
65498646 | 295 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ |
97e1c18e | 296 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
297 | } \ |
298 | \ | |
299 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
300 | *(.rodata1) \ | |
301 | } \ | |
302 | \ | |
303 | /* PCI quirks */ \ | |
304 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
305 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
4b89b7f7 | 306 | KEEP(*(.pci_fixup_early)) \ |
1da177e4 LT |
307 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
308 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
4b89b7f7 | 309 | KEEP(*(.pci_fixup_header)) \ |
1da177e4 LT |
310 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
311 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
4b89b7f7 | 312 | KEEP(*(.pci_fixup_final)) \ |
1da177e4 LT |
313 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
314 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
4b89b7f7 | 315 | KEEP(*(.pci_fixup_enable)) \ |
1da177e4 | 316 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
1597cacb | 317 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
4b89b7f7 | 318 | KEEP(*(.pci_fixup_resume)) \ |
1597cacb | 319 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
e1a2a51e | 320 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
4b89b7f7 | 321 | KEEP(*(.pci_fixup_resume_early)) \ |
e1a2a51e RW |
322 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
323 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
4b89b7f7 | 324 | KEEP(*(.pci_fixup_suspend)) \ |
e1a2a51e | 325 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
7d2a01b8 | 326 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
4b89b7f7 | 327 | KEEP(*(.pci_fixup_suspend_late)) \ |
7d2a01b8 | 328 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ |
1da177e4 LT |
329 | } \ |
330 | \ | |
5658c769 DW |
331 | /* Built-in firmware blobs */ \ |
332 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
333 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
4b89b7f7 | 334 | KEEP(*(.builtin_fw)) \ |
5658c769 DW |
335 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
336 | } \ | |
337 | \ | |
63687a52 JB |
338 | TRACEDATA \ |
339 | \ | |
1da177e4 LT |
340 | /* Kernel symbol table: Normal symbols */ \ |
341 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
342 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
b67067f1 | 343 | KEEP(*(SORT(___ksymtab+*))) \ |
1da177e4 LT |
344 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
345 | } \ | |
346 | \ | |
347 | /* Kernel symbol table: GPL-only symbols */ \ | |
348 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
349 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
b67067f1 | 350 | KEEP(*(SORT(___ksymtab_gpl+*))) \ |
1da177e4 LT |
351 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
352 | } \ | |
353 | \ | |
f71d20e9 AV |
354 | /* Kernel symbol table: Normal unused symbols */ \ |
355 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
356 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
b67067f1 | 357 | KEEP(*(SORT(___ksymtab_unused+*))) \ |
f71d20e9 AV |
358 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
359 | } \ | |
360 | \ | |
361 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
362 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
363 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
b67067f1 | 364 | KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ |
f71d20e9 AV |
365 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
366 | } \ | |
367 | \ | |
9f28bb7e GKH |
368 | /* Kernel symbol table: GPL-future-only symbols */ \ |
369 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
370 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
b67067f1 | 371 | KEEP(*(SORT(___ksymtab_gpl_future+*))) \ |
9f28bb7e GKH |
372 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
373 | } \ | |
374 | \ | |
1da177e4 LT |
375 | /* Kernel symbol table: Normal symbols */ \ |
376 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
377 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
b67067f1 | 378 | KEEP(*(SORT(___kcrctab+*))) \ |
1da177e4 LT |
379 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
380 | } \ | |
381 | \ | |
382 | /* Kernel symbol table: GPL-only symbols */ \ | |
383 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
384 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
b67067f1 | 385 | KEEP(*(SORT(___kcrctab_gpl+*))) \ |
1da177e4 LT |
386 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
387 | } \ | |
388 | \ | |
f71d20e9 AV |
389 | /* Kernel symbol table: Normal unused symbols */ \ |
390 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
391 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
b67067f1 | 392 | KEEP(*(SORT(___kcrctab_unused+*))) \ |
f71d20e9 AV |
393 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
394 | } \ | |
395 | \ | |
396 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
397 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
398 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
b67067f1 | 399 | KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ |
f71d20e9 AV |
400 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
401 | } \ | |
402 | \ | |
9f28bb7e GKH |
403 | /* Kernel symbol table: GPL-future-only symbols */ \ |
404 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
405 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
b67067f1 | 406 | KEEP(*(SORT(___kcrctab_gpl_future+*))) \ |
9f28bb7e GKH |
407 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
408 | } \ | |
409 | \ | |
1da177e4 LT |
410 | /* Kernel symbol table: strings */ \ |
411 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
4b89b7f7 | 412 | *(__ksymtab_strings) \ |
1da177e4 LT |
413 | } \ |
414 | \ | |
eb8f6890 SR |
415 | /* __*init sections */ \ |
416 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 417 | *(.ref.rodata) \ |
eb8f6890 SR |
418 | MEM_KEEP(init.rodata) \ |
419 | MEM_KEEP(exit.rodata) \ | |
420 | } \ | |
421 | \ | |
1da177e4 LT |
422 | /* Built-in module parameters. */ \ |
423 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
424 | VMLINUX_SYMBOL(__start___param) = .; \ | |
4b89b7f7 | 425 | KEEP(*(__param)) \ |
1da177e4 | 426 | VMLINUX_SYMBOL(__stop___param) = .; \ |
e94965ed DT |
427 | } \ |
428 | \ | |
429 | /* Built-in module versions. */ \ | |
430 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
431 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
4b89b7f7 | 432 | KEEP(*(__modver)) \ |
e94965ed | 433 | VMLINUX_SYMBOL(__stop___modver) = .; \ |
edeed305 | 434 | . = ALIGN((align)); \ |
6569580d | 435 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 436 | } \ |
4096b46f SR |
437 | . = ALIGN((align)); |
438 | ||
ef53dae8 | 439 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 440 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
441 | #define RODATA RO_DATA_SECTION(4096) |
442 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
443 | |
444 | #define SECURITY_INIT \ | |
60bad7fa | 445 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 | 446 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
b67067f1 | 447 | KEEP(*(.security_initcall.init)) \ |
1da177e4 LT |
448 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
449 | } | |
450 | ||
cb87481e NP |
451 | /* |
452 | * .text section. Map to function alignment to avoid address changes | |
0f4c4af0 | 453 | * during second ld run in second ld pass when generating System.map |
cb87481e NP |
454 | * |
455 | * TEXT_MAIN here will match .text.fixup and .text.unlikely if dead | |
456 | * code elimination is enabled, so these sections should be converted | |
457 | * to use ".." first. | |
458 | */ | |
7664709b SR |
459 | #define TEXT_TEXT \ |
460 | ALIGN_FUNCTION(); \ | |
cb87481e | 461 | *(.text.hot TEXT_MAIN .text.fixup .text.unlikely) \ |
312b1485 | 462 | *(.ref.text) \ |
eb8f6890 | 463 | MEM_KEEP(init.text) \ |
fb5e2b37 | 464 | MEM_KEEP(exit.text) \ |
eb8f6890 | 465 | |
7664709b | 466 | |
6d30e3a8 SR |
467 | /* sched.text is aling to function alignment to secure we have same |
468 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 469 | #define SCHED_TEXT \ |
6d30e3a8 | 470 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
471 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
472 | *(.sched.text) \ | |
473 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
474 | ||
6d30e3a8 SR |
475 | /* spinlock.text is aling to function alignment to secure we have same |
476 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 477 | #define LOCK_TEXT \ |
6d30e3a8 | 478 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
479 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
480 | *(.spinlock.text) \ | |
481 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 | 482 | |
6727ad9e CM |
483 | #define CPUIDLE_TEXT \ |
484 | ALIGN_FUNCTION(); \ | |
485 | VMLINUX_SYMBOL(__cpuidle_text_start) = .; \ | |
486 | *(.cpuidle.text) \ | |
487 | VMLINUX_SYMBOL(__cpuidle_text_end) = .; | |
488 | ||
d0aaff97 PP |
489 | #define KPROBES_TEXT \ |
490 | ALIGN_FUNCTION(); \ | |
491 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
492 | *(.kprobes.text) \ | |
493 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 494 | |
ea714547 JO |
495 | #define ENTRY_TEXT \ |
496 | ALIGN_FUNCTION(); \ | |
497 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
498 | *(.entry.text) \ | |
499 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
500 | ||
a0343e82 FW |
501 | #define IRQENTRY_TEXT \ |
502 | ALIGN_FUNCTION(); \ | |
503 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
504 | *(.irqentry.text) \ | |
505 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
a0343e82 | 506 | |
be7635e7 AP |
507 | #define SOFTIRQENTRY_TEXT \ |
508 | ALIGN_FUNCTION(); \ | |
509 | VMLINUX_SYMBOL(__softirqentry_text_start) = .; \ | |
510 | *(.softirqentry.text) \ | |
511 | VMLINUX_SYMBOL(__softirqentry_text_end) = .; | |
be7635e7 | 512 | |
37c514e3 | 513 | /* Section used for early init (in .S files) */ |
7923f90f | 514 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 515 | |
7923f90f | 516 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
517 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
518 | HEAD_TEXT \ | |
519 | } | |
520 | ||
521 | /* | |
522 | * Exception table | |
523 | */ | |
524 | #define EXCEPTION_TABLE(align) \ | |
525 | . = ALIGN(align); \ | |
526 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
527 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
4b89b7f7 | 528 | KEEP(*(__ex_table)) \ |
ef53dae8 SR |
529 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
530 | } | |
531 | ||
532 | /* | |
533 | * Init task | |
534 | */ | |
39a449d9 | 535 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 536 | . = ALIGN(align); \ |
da5e37ef | 537 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 538 | INIT_TASK_DATA(align) \ |
ef53dae8 | 539 | } |
37c514e3 | 540 | |
b99b87f7 | 541 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
542 | #define KERNEL_CTORS() . = ALIGN(8); \ |
543 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
4b89b7f7 NP |
544 | KEEP(*(.ctors)) \ |
545 | KEEP(*(SORT(.init_array.*))) \ | |
546 | KEEP(*(.init_array)) \ | |
b99b87f7 PO |
547 | VMLINUX_SYMBOL(__ctors_end) = .; |
548 | #else | |
549 | #define KERNEL_CTORS() | |
550 | #endif | |
551 | ||
01ba2bdc | 552 | /* init and exit section handling */ |
eb8f6890 | 553 | #define INIT_DATA \ |
b67067f1 | 554 | KEEP(*(SORT(___kentry+*))) \ |
eb8f6890 | 555 | *(.init.data) \ |
eb8f6890 | 556 | MEM_DISCARD(init.data) \ |
b99b87f7 | 557 | KERNEL_CTORS() \ |
4b3b4c5e | 558 | MCOUNT_REC() \ |
9fd49328 | 559 | *(.init.rodata) \ |
e4a9ea5e | 560 | FTRACE_EVENTS() \ |
3d56e331 | 561 | TRACE_SYSCALLS() \ |
376e2424 | 562 | KPROBE_BLACKLIST() \ |
aab94339 | 563 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 564 | CLK_OF_TABLES() \ |
f618c470 | 565 | RESERVEDMEM_OF_TABLES() \ |
2fcc112a | 566 | TIMER_OF_TABLES() \ |
1cd076bf | 567 | IOMMU_OF_TABLES() \ |
6c3ff8b1 | 568 | CPU_METHOD_OF_TABLES() \ |
449e056c | 569 | CPUIDLE_METHOD_OF_TABLES() \ |
f6e916b8 | 570 | KERNEL_DTB() \ |
b0b6abd3 | 571 | IRQCHIP_OF_MATCH_TABLE() \ |
46e589a3 | 572 | ACPI_PROBE_TABLE(irqchip) \ |
2fcc112a DL |
573 | ACPI_PROBE_TABLE(timer) \ |
574 | ACPI_PROBE_TABLE(iort) \ | |
2eaa7909 | 575 | EARLYCON_TABLE() |
eb8f6890 SR |
576 | |
577 | #define INIT_TEXT \ | |
578 | *(.init.text) \ | |
e41f501d | 579 | *(.text.startup) \ |
eb8f6890 SR |
580 | MEM_DISCARD(init.text) |
581 | ||
582 | #define EXIT_DATA \ | |
583 | *(.exit.data) \ | |
e41f501d DV |
584 | *(.fini_array) \ |
585 | *(.dtors) \ | |
eb8f6890 SR |
586 | MEM_DISCARD(exit.data) \ |
587 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 588 | |
eb8f6890 SR |
589 | #define EXIT_TEXT \ |
590 | *(.exit.text) \ | |
e41f501d | 591 | *(.text.exit) \ |
eb8f6890 | 592 | MEM_DISCARD(exit.text) |
01ba2bdc | 593 | |
7923f90f SR |
594 | #define EXIT_CALL \ |
595 | *(.exitcall.exit) | |
596 | ||
ef53dae8 SR |
597 | /* |
598 | * bss (Block Started by Symbol) - uninitialized data | |
599 | * zeroed during startup | |
600 | */ | |
04e448d9 TA |
601 | #define SBSS(sbss_align) \ |
602 | . = ALIGN(sbss_align); \ | |
ef53dae8 | 603 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
83a092cf | 604 | *(.dynsbss) \ |
ef53dae8 SR |
605 | *(.sbss) \ |
606 | *(.scommon) \ | |
607 | } | |
608 | ||
c87728ca DD |
609 | /* |
610 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
611 | * sections to the front of bss. | |
612 | */ | |
613 | #ifndef BSS_FIRST_SECTIONS | |
614 | #define BSS_FIRST_SECTIONS | |
615 | #endif | |
616 | ||
ef53dae8 SR |
617 | #define BSS(bss_align) \ |
618 | . = ALIGN(bss_align); \ | |
619 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 620 | BSS_FIRST_SECTIONS \ |
7c74df07 | 621 | *(.bss..page_aligned) \ |
ef53dae8 | 622 | *(.dynbss) \ |
cb87481e | 623 | *(BSS_MAIN) \ |
ef53dae8 | 624 | *(COMMON) \ |
ef53dae8 SR |
625 | } |
626 | ||
627 | /* | |
628 | * DWARF debug sections. | |
629 | * Symbols in the DWARF debugging sections are relative to | |
630 | * the beginning of the section so we begin them at 0. | |
631 | */ | |
a7d0c210 PBG |
632 | #define DWARF_DEBUG \ |
633 | /* DWARF 1 */ \ | |
634 | .debug 0 : { *(.debug) } \ | |
635 | .line 0 : { *(.line) } \ | |
636 | /* GNU DWARF 1 extensions */ \ | |
637 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
638 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
639 | /* DWARF 1.1 and DWARF 2 */ \ | |
640 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
641 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
642 | /* DWARF 2 */ \ | |
643 | .debug_info 0 : { *(.debug_info \ | |
644 | .gnu.linkonce.wi.*) } \ | |
645 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
646 | .debug_line 0 : { *(.debug_line) } \ | |
647 | .debug_frame 0 : { *(.debug_frame) } \ | |
648 | .debug_str 0 : { *(.debug_str) } \ | |
649 | .debug_loc 0 : { *(.debug_loc) } \ | |
650 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
83a092cf NP |
651 | .debug_pubtypes 0 : { *(.debug_pubtypes) } \ |
652 | /* DWARF 3 */ \ | |
653 | .debug_ranges 0 : { *(.debug_ranges) } \ | |
a7d0c210 PBG |
654 | /* SGI/MIPS DWARF 2 extensions */ \ |
655 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
656 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
657 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
658 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
83a092cf NP |
659 | /* GNU DWARF 2 extensions */ \ |
660 | .debug_gnu_pubnames 0 : { *(.debug_gnu_pubnames) } \ | |
661 | .debug_gnu_pubtypes 0 : { *(.debug_gnu_pubtypes) } \ | |
662 | /* DWARF 4 */ \ | |
663 | .debug_types 0 : { *(.debug_types) } \ | |
664 | /* DWARF 5 */ \ | |
665 | .debug_macro 0 : { *(.debug_macro) } \ | |
666 | .debug_addr 0 : { *(.debug_addr) } | |
a7d0c210 PBG |
667 | |
668 | /* Stabs debugging sections. */ | |
669 | #define STABS_DEBUG \ | |
670 | .stab 0 : { *(.stab) } \ | |
671 | .stabstr 0 : { *(.stabstr) } \ | |
672 | .stab.excl 0 : { *(.stab.excl) } \ | |
673 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
674 | .stab.index 0 : { *(.stab.index) } \ | |
675 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
676 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 677 | |
6360b1fb | 678 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
679 | #define BUG_TABLE \ |
680 | . = ALIGN(8); \ | |
681 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 682 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
4b89b7f7 | 683 | KEEP(*(__bug_table)) \ |
c6de0026 | 684 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 685 | } |
6360b1fb JB |
686 | #else |
687 | #define BUG_TABLE | |
688 | #endif | |
7664c5a1 | 689 | |
ee9f8fce JP |
690 | #ifdef CONFIG_ORC_UNWINDER |
691 | #define ORC_UNWIND_TABLE \ | |
692 | . = ALIGN(4); \ | |
693 | .orc_unwind_ip : AT(ADDR(.orc_unwind_ip) - LOAD_OFFSET) { \ | |
694 | VMLINUX_SYMBOL(__start_orc_unwind_ip) = .; \ | |
695 | KEEP(*(.orc_unwind_ip)) \ | |
696 | VMLINUX_SYMBOL(__stop_orc_unwind_ip) = .; \ | |
697 | } \ | |
698 | . = ALIGN(6); \ | |
699 | .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ | |
700 | VMLINUX_SYMBOL(__start_orc_unwind) = .; \ | |
701 | KEEP(*(.orc_unwind)) \ | |
702 | VMLINUX_SYMBOL(__stop_orc_unwind) = .; \ | |
703 | } \ | |
704 | . = ALIGN(4); \ | |
705 | .orc_lookup : AT(ADDR(.orc_lookup) - LOAD_OFFSET) { \ | |
706 | VMLINUX_SYMBOL(orc_lookup) = .; \ | |
707 | . += (((SIZEOF(.text) + LOOKUP_BLOCK_SIZE - 1) / \ | |
708 | LOOKUP_BLOCK_SIZE) + 1) * 4; \ | |
709 | VMLINUX_SYMBOL(orc_lookup_end) = .; \ | |
710 | } | |
711 | #else | |
712 | #define ORC_UNWIND_TABLE | |
713 | #endif | |
714 | ||
63687a52 JB |
715 | #ifdef CONFIG_PM_TRACE |
716 | #define TRACEDATA \ | |
717 | . = ALIGN(4); \ | |
718 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 719 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
4b89b7f7 | 720 | KEEP(*(.tracedata)) \ |
c6de0026 | 721 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
722 | } |
723 | #else | |
724 | #define TRACEDATA | |
725 | #endif | |
726 | ||
9c9b8b38 | 727 | #define NOTES \ |
cbe87121 RM |
728 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
729 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
730 | *(.note.*) \ | |
731 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
732 | } | |
61ce1efe | 733 | |
ef53dae8 SR |
734 | #define INIT_SETUP(initsetup_align) \ |
735 | . = ALIGN(initsetup_align); \ | |
736 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
4b89b7f7 | 737 | KEEP(*(.init.setup)) \ |
ef53dae8 SR |
738 | VMLINUX_SYMBOL(__setup_end) = .; |
739 | ||
026cee00 PM |
740 | #define INIT_CALLS_LEVEL(level) \ |
741 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
b67067f1 NP |
742 | KEEP(*(.initcall##level##.init)) \ |
743 | KEEP(*(.initcall##level##s.init)) \ | |
61ce1efe | 744 | |
ef53dae8 SR |
745 | #define INIT_CALLS \ |
746 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
b67067f1 | 747 | KEEP(*(.initcallearly.init)) \ |
026cee00 PM |
748 | INIT_CALLS_LEVEL(0) \ |
749 | INIT_CALLS_LEVEL(1) \ | |
750 | INIT_CALLS_LEVEL(2) \ | |
751 | INIT_CALLS_LEVEL(3) \ | |
752 | INIT_CALLS_LEVEL(4) \ | |
753 | INIT_CALLS_LEVEL(5) \ | |
754 | INIT_CALLS_LEVEL(rootfs) \ | |
755 | INIT_CALLS_LEVEL(6) \ | |
756 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
757 | VMLINUX_SYMBOL(__initcall_end) = .; |
758 | ||
759 | #define CON_INITCALL \ | |
760 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
b67067f1 | 761 | KEEP(*(.con_initcall.init)) \ |
ef53dae8 SR |
762 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
763 | ||
764 | #define SECURITY_INITCALL \ | |
765 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
b67067f1 | 766 | KEEP(*(.security_initcall.init)) \ |
ef53dae8 SR |
767 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
768 | ||
769 | #ifdef CONFIG_BLK_DEV_INITRD | |
770 | #define INIT_RAM_FS \ | |
d8826262 | 771 | . = ALIGN(4); \ |
ef53dae8 | 772 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
b67067f1 | 773 | KEEP(*(.init.ramfs)) \ |
ffe8018c | 774 | . = ALIGN(8); \ |
b67067f1 | 775 | KEEP(*(.init.ramfs.info)) |
ef53dae8 | 776 | #else |
eadfe219 | 777 | #define INIT_RAM_FS |
ef53dae8 SR |
778 | #endif |
779 | ||
023bf6f1 TH |
780 | /* |
781 | * Default discarded sections. | |
782 | * | |
783 | * Some archs want to discard exit text/data at runtime rather than | |
784 | * link time due to cross-section references such as alt instructions, | |
785 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
786 | * section definitions so that such archs put those in earlier section | |
787 | * definitions. | |
788 | */ | |
405d967d TH |
789 | #define DISCARDS \ |
790 | /DISCARD/ : { \ | |
791 | EXIT_TEXT \ | |
792 | EXIT_DATA \ | |
023bf6f1 | 793 | EXIT_CALL \ |
405d967d | 794 | *(.discard) \ |
c7f52cdc | 795 | *(.discard.*) \ |
405d967d TH |
796 | } |
797 | ||
6ea0c34d MF |
798 | /** |
799 | * PERCPU_INPUT - the percpu input sections | |
800 | * @cacheline: cacheline size | |
801 | * | |
802 | * The core percpu section names and core symbols which do not rely | |
803 | * directly upon load addresses. | |
804 | * | |
805 | * @cacheline is used to align subsections to avoid false cacheline | |
806 | * sharing between subsections for different purposes. | |
807 | */ | |
808 | #define PERCPU_INPUT(cacheline) \ | |
809 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
810 | *(.data..percpu..first) \ | |
811 | . = ALIGN(PAGE_SIZE); \ | |
812 | *(.data..percpu..page_aligned) \ | |
813 | . = ALIGN(cacheline); \ | |
330d2822 | 814 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
815 | . = ALIGN(cacheline); \ |
816 | *(.data..percpu) \ | |
817 | *(.data..percpu..shared_aligned) \ | |
818 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
819 | ||
3e5d8f97 | 820 | /** |
6b7c38d5 | 821 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 822 | * @cacheline: cacheline size |
3e5d8f97 TH |
823 | * @vaddr: explicit base address (optional) |
824 | * @phdr: destination PHDR (optional) | |
825 | * | |
19df0c2f TH |
826 | * Macro which expands to output section for percpu area. |
827 | * | |
828 | * @cacheline is used to align subsections to avoid false cacheline | |
829 | * sharing between subsections for different purposes. | |
830 | * | |
831 | * If @vaddr is not blank, it specifies explicit base address and all | |
832 | * percpu symbols will be offset from the given address. If blank, | |
833 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
834 | * |
835 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
836 | * output PHDR is sticky. If @phdr is specified, the next output | |
837 | * section in the linker script will go there too. @phdr should have | |
838 | * a leading colon. | |
839 | * | |
3ac6cffe TH |
840 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
841 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 842 | * address, use PERCPU_SECTION. |
3e5d8f97 | 843 | */ |
19df0c2f | 844 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 845 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 846 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 847 | - LOAD_OFFSET) { \ |
6ea0c34d | 848 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 849 | } phdr \ |
3d9a854c | 850 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
851 | |
852 | /** | |
0415b00d | 853 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 854 | * @cacheline: cacheline size |
3e5d8f97 | 855 | * |
0415b00d TH |
856 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
857 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 858 | * __per_cpu_start will be identical. |
3ac6cffe | 859 | * |
0415b00d | 860 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
861 | * except that __per_cpu_load is defined as a relative symbol against |
862 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 863 | */ |
0415b00d TH |
864 | #define PERCPU_SECTION(cacheline) \ |
865 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 866 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 867 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 868 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 869 | } |
ef53dae8 SR |
870 | |
871 | ||
872 | /* | |
873 | * Definition of the high level *_SECTION macros | |
874 | * They will fit only a subset of the architectures | |
875 | */ | |
876 | ||
877 | ||
878 | /* | |
879 | * Writeable data. | |
880 | * All sections are combined in a single .data section. | |
881 | * The sections following CONSTRUCTORS are arranged so their | |
882 | * typical alignment matches. | |
883 | * A cacheline is typical/always less than a PAGE_SIZE so | |
884 | * the sections that has this restriction (or similar) | |
885 | * is located before the ones requiring PAGE_SIZE alignment. | |
886 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 887 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 888 | * |
7923f90f | 889 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 890 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
891 | . = ALIGN(PAGE_SIZE); \ |
892 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 893 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
894 | NOSAVE_DATA \ |
895 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
896 | CACHELINE_ALIGNED_DATA(cacheline) \ |
897 | READ_MOSTLY_DATA(cacheline) \ | |
898 | DATA_DATA \ | |
899 | CONSTRUCTORS \ | |
19d43626 | 900 | } \ |
ee9f8fce | 901 | BUG_TABLE \ |
ef53dae8 SR |
902 | |
903 | #define INIT_TEXT_SECTION(inittext_align) \ | |
904 | . = ALIGN(inittext_align); \ | |
905 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
906 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
907 | INIT_TEXT \ | |
908 | VMLINUX_SYMBOL(_einittext) = .; \ | |
909 | } | |
910 | ||
911 | #define INIT_DATA_SECTION(initsetup_align) \ | |
912 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
913 | INIT_DATA \ | |
914 | INIT_SETUP(initsetup_align) \ | |
915 | INIT_CALLS \ | |
916 | CON_INITCALL \ | |
917 | SECURITY_INITCALL \ | |
918 | INIT_RAM_FS \ | |
919 | } | |
920 | ||
04e448d9 TA |
921 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
922 | . = ALIGN(sbss_align); \ | |
923 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
924 | SBSS(sbss_align) \ | |
ef53dae8 | 925 | BSS(bss_align) \ |
04e448d9 TA |
926 | . = ALIGN(stop_align); \ |
927 | VMLINUX_SYMBOL(__bss_stop) = .; |