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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 | ||
07fca0e5 SR |
62 | /* |
63 | * Align to a 32 byte boundary equal to the | |
64 | * alignment gcc 4.5 uses for a struct | |
65 | */ | |
aab94339 DB |
66 | #define STRUCT_ALIGNMENT 32 |
67 | #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT) | |
07fca0e5 | 68 | |
eb8f6890 SR |
69 | /* The actual configuration determine if the init/exit sections |
70 | * are handled as text/data or they can be discarded (which | |
71 | * often happens at runtime) | |
72 | */ | |
eb8f6890 SR |
73 | #ifdef CONFIG_HOTPLUG_CPU |
74 | #define CPU_KEEP(sec) *(.cpu##sec) | |
75 | #define CPU_DISCARD(sec) | |
76 | #else | |
77 | #define CPU_KEEP(sec) | |
78 | #define CPU_DISCARD(sec) *(.cpu##sec) | |
79 | #endif | |
80 | ||
1a3fb6d4 | 81 | #if defined(CONFIG_MEMORY_HOTPLUG) |
eb8f6890 SR |
82 | #define MEM_KEEP(sec) *(.mem##sec) |
83 | #define MEM_DISCARD(sec) | |
84 | #else | |
85 | #define MEM_KEEP(sec) | |
86 | #define MEM_DISCARD(sec) *(.mem##sec) | |
87 | #endif | |
88 | ||
8da3821b | 89 | #ifdef CONFIG_FTRACE_MCOUNT_RECORD |
4b3b4c5e JR |
90 | #define MCOUNT_REC() . = ALIGN(8); \ |
91 | VMLINUX_SYMBOL(__start_mcount_loc) = .; \ | |
8da3821b SR |
92 | *(__mcount_loc) \ |
93 | VMLINUX_SYMBOL(__stop_mcount_loc) = .; | |
94 | #else | |
95 | #define MCOUNT_REC() | |
96 | #endif | |
eb8f6890 | 97 | |
2ed84eeb | 98 | #ifdef CONFIG_TRACE_BRANCH_PROFILING |
45b79749 SR |
99 | #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \ |
100 | *(_ftrace_annotated_branch) \ | |
101 | VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .; | |
1f0d69a9 SR |
102 | #else |
103 | #define LIKELY_PROFILE() | |
104 | #endif | |
105 | ||
2bcd521a SR |
106 | #ifdef CONFIG_PROFILE_ALL_BRANCHES |
107 | #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \ | |
108 | *(_ftrace_branch) \ | |
109 | VMLINUX_SYMBOL(__stop_branch_profile) = .; | |
110 | #else | |
111 | #define BRANCH_PROFILE() | |
112 | #endif | |
113 | ||
376e2424 | 114 | #ifdef CONFIG_KPROBES |
69902c71 VG |
115 | #define KPROBE_BLACKLIST() . = ALIGN(8); \ |
116 | VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \ | |
4b89b7f7 | 117 | KEEP(*(_kprobe_blacklist)) \ |
376e2424 MH |
118 | VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .; |
119 | #else | |
120 | #define KPROBE_BLACKLIST() | |
121 | #endif | |
122 | ||
5f77a88b | 123 | #ifdef CONFIG_EVENT_TRACING |
e4a9ea5e SR |
124 | #define FTRACE_EVENTS() . = ALIGN(8); \ |
125 | VMLINUX_SYMBOL(__start_ftrace_events) = .; \ | |
4b89b7f7 | 126 | KEEP(*(_ftrace_events)) \ |
0c564a53 SRRH |
127 | VMLINUX_SYMBOL(__stop_ftrace_events) = .; \ |
128 | VMLINUX_SYMBOL(__start_ftrace_enum_maps) = .; \ | |
4b89b7f7 | 129 | KEEP(*(_ftrace_enum_map)) \ |
0c564a53 | 130 | VMLINUX_SYMBOL(__stop_ftrace_enum_maps) = .; |
b77e38aa SR |
131 | #else |
132 | #define FTRACE_EVENTS() | |
133 | #endif | |
134 | ||
1ba28e02 LJ |
135 | #ifdef CONFIG_TRACING |
136 | #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \ | |
4b89b7f7 | 137 | KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \ |
1ba28e02 | 138 | VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .; |
102c9323 | 139 | #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \ |
4b89b7f7 | 140 | KEEP(*(__tracepoint_str)) /* Trace_printk fmt' pointer */ \ |
102c9323 | 141 | VMLINUX_SYMBOL(__stop___tracepoint_str) = .; |
1ba28e02 LJ |
142 | #else |
143 | #define TRACE_PRINTKS() | |
102c9323 | 144 | #define TRACEPOINT_STR() |
1ba28e02 LJ |
145 | #endif |
146 | ||
bed1ffca | 147 | #ifdef CONFIG_FTRACE_SYSCALLS |
3d56e331 SR |
148 | #define TRACE_SYSCALLS() . = ALIGN(8); \ |
149 | VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \ | |
4b89b7f7 | 150 | KEEP(*(__syscalls_metadata)) \ |
bed1ffca FW |
151 | VMLINUX_SYMBOL(__stop_syscalls_metadata) = .; |
152 | #else | |
153 | #define TRACE_SYSCALLS() | |
154 | #endif | |
155 | ||
470ca0de | 156 | #ifdef CONFIG_SERIAL_EARLYCON |
99492c39 | 157 | #define EARLYCON_TABLE() STRUCT_ALIGN(); \ |
470ca0de | 158 | VMLINUX_SYMBOL(__earlycon_table) = .; \ |
4b89b7f7 | 159 | KEEP(*(__earlycon_table)) \ |
2eaa7909 | 160 | VMLINUX_SYMBOL(__earlycon_table_end) = .; |
470ca0de PH |
161 | #else |
162 | #define EARLYCON_TABLE() | |
163 | #endif | |
aab94339 | 164 | |
06309288 RH |
165 | #define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name) |
166 | #define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name) | |
5ee02af1 | 167 | #define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name) |
06309288 RH |
168 | #define _OF_TABLE_0(name) |
169 | #define _OF_TABLE_1(name) \ | |
f6e916b8 | 170 | . = ALIGN(8); \ |
06309288 | 171 | VMLINUX_SYMBOL(__##name##_of_table) = .; \ |
4b89b7f7 NP |
172 | KEEP(*(__##name##_of_table)) \ |
173 | KEEP(*(__##name##_of_table_end)) | |
06309288 RH |
174 | |
175 | #define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc) | |
8d09617b | 176 | #define CLKEVT_OF_TABLES() OF_TABLE(CONFIG_CLKEVT_OF, clkevt) |
06309288 RH |
177 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) |
178 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
1cd076bf | 179 | #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) |
06309288 RH |
180 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) |
181 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
449e056c | 182 | #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) |
6c3ff8b1 | 183 | |
e647b532 MZ |
184 | #ifdef CONFIG_ACPI |
185 | #define ACPI_PROBE_TABLE(name) \ | |
186 | . = ALIGN(8); \ | |
187 | VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \ | |
4b89b7f7 | 188 | KEEP(*(__##name##_acpi_probe_table)) \ |
e647b532 MZ |
189 | VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .; |
190 | #else | |
191 | #define ACPI_PROBE_TABLE(name) | |
192 | #endif | |
193 | ||
aab94339 DB |
194 | #define KERNEL_DTB() \ |
195 | STRUCT_ALIGN(); \ | |
196 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
4b89b7f7 | 197 | KEEP(*(.dtb.init.rodata)) \ |
aab94339 DB |
198 | VMLINUX_SYMBOL(__dtb_end) = .; |
199 | ||
b67067f1 NP |
200 | /* |
201 | * .data section | |
0f4c4af0 NP |
202 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections generates |
203 | * .data.identifier which needs to be pulled in with .data, but don't want to | |
204 | * pull in .data..stuff which has its own requirements. Same for bss. | |
b67067f1 | 205 | */ |
ca967258 | 206 | #define DATA_DATA \ |
b67067f1 | 207 | *(.data .data.[0-9a-zA-Z_]*) \ |
312b1485 | 208 | *(.ref.data) \ |
d356c0b6 | 209 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
210 | MEM_KEEP(init.data) \ |
211 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 212 | *(.data.unlikely) \ |
65498646 | 213 | STRUCT_ALIGN(); \ |
97e1c18e | 214 | *(__tracepoints) \ |
e9d376f0 | 215 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
216 | . = ALIGN(8); \ |
217 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
4b89b7f7 | 218 | KEEP(*(__jump_table)) \ |
d430d3d7 | 219 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ |
e9d376f0 JB |
220 | . = ALIGN(8); \ |
221 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
4b89b7f7 | 222 | KEEP(*(__verbose)) \ |
e9d376f0 | 223 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
2bcd521a | 224 | LIKELY_PROFILE() \ |
b77e38aa | 225 | BRANCH_PROFILE() \ |
102c9323 SRRH |
226 | TRACE_PRINTKS() \ |
227 | TRACEPOINT_STR() | |
ca967258 | 228 | |
ef53dae8 SR |
229 | /* |
230 | * Data section helpers | |
231 | */ | |
232 | #define NOSAVE_DATA \ | |
233 | . = ALIGN(PAGE_SIZE); \ | |
234 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 235 | *(.data..nosave) \ |
ef53dae8 SR |
236 | . = ALIGN(PAGE_SIZE); \ |
237 | VMLINUX_SYMBOL(__nosave_end) = .; | |
238 | ||
239 | #define PAGE_ALIGNED_DATA(page_align) \ | |
240 | . = ALIGN(page_align); \ | |
75b13483 | 241 | *(.data..page_aligned) |
ef53dae8 SR |
242 | |
243 | #define READ_MOSTLY_DATA(align) \ | |
244 | . = ALIGN(align); \ | |
8369744f SL |
245 | *(.data..read_mostly) \ |
246 | . = ALIGN(align); | |
ef53dae8 SR |
247 | |
248 | #define CACHELINE_ALIGNED_DATA(align) \ | |
249 | . = ALIGN(align); \ | |
4af57b78 | 250 | *(.data..cacheline_aligned) |
ef53dae8 | 251 | |
39a449d9 | 252 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 253 | . = ALIGN(align); \ |
91ed140d BP |
254 | VMLINUX_SYMBOL(__start_init_task) = .; \ |
255 | *(.data..init_task) \ | |
256 | VMLINUX_SYMBOL(__end_init_task) = .; | |
ef53dae8 | 257 | |
32fb2fc5 HC |
258 | /* |
259 | * Allow architectures to handle ro_after_init data on their | |
260 | * own by defining an empty RO_AFTER_INIT_DATA. | |
261 | */ | |
262 | #ifndef RO_AFTER_INIT_DATA | |
d7c19b06 | 263 | #define RO_AFTER_INIT_DATA \ |
d79bf21e | 264 | VMLINUX_SYMBOL(__start_ro_after_init) = .; \ |
d7c19b06 | 265 | *(.data..ro_after_init) \ |
d79bf21e | 266 | VMLINUX_SYMBOL(__end_ro_after_init) = .; |
32fb2fc5 HC |
267 | #endif |
268 | ||
ef53dae8 SR |
269 | /* |
270 | * Read only Data | |
271 | */ | |
272 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 273 | . = ALIGN((align)); \ |
1da177e4 | 274 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 275 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 | 276 | *(.rodata) *(.rodata.*) \ |
32fb2fc5 | 277 | RO_AFTER_INIT_DATA /* Read only after init */ \ |
4b89b7f7 | 278 | KEEP(*(__vermagic)) /* Kernel version magic */ \ |
65498646 MD |
279 | . = ALIGN(8); \ |
280 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
4b89b7f7 | 281 | KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ |
65498646 | 282 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ |
97e1c18e | 283 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
284 | } \ |
285 | \ | |
286 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
287 | *(.rodata1) \ | |
288 | } \ | |
289 | \ | |
290 | /* PCI quirks */ \ | |
291 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
292 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
4b89b7f7 | 293 | KEEP(*(.pci_fixup_early)) \ |
1da177e4 LT |
294 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
295 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
4b89b7f7 | 296 | KEEP(*(.pci_fixup_header)) \ |
1da177e4 LT |
297 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
298 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
4b89b7f7 | 299 | KEEP(*(.pci_fixup_final)) \ |
1da177e4 LT |
300 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
301 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
4b89b7f7 | 302 | KEEP(*(.pci_fixup_enable)) \ |
1da177e4 | 303 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
1597cacb | 304 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
4b89b7f7 | 305 | KEEP(*(.pci_fixup_resume)) \ |
1597cacb | 306 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
e1a2a51e | 307 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
4b89b7f7 | 308 | KEEP(*(.pci_fixup_resume_early)) \ |
e1a2a51e RW |
309 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
310 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
4b89b7f7 | 311 | KEEP(*(.pci_fixup_suspend)) \ |
e1a2a51e | 312 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
7d2a01b8 | 313 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
4b89b7f7 | 314 | KEEP(*(.pci_fixup_suspend_late)) \ |
7d2a01b8 | 315 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ |
1da177e4 LT |
316 | } \ |
317 | \ | |
5658c769 DW |
318 | /* Built-in firmware blobs */ \ |
319 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
320 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
4b89b7f7 | 321 | KEEP(*(.builtin_fw)) \ |
5658c769 DW |
322 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
323 | } \ | |
324 | \ | |
63687a52 JB |
325 | TRACEDATA \ |
326 | \ | |
1da177e4 LT |
327 | /* Kernel symbol table: Normal symbols */ \ |
328 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
329 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
b67067f1 | 330 | KEEP(*(SORT(___ksymtab+*))) \ |
1da177e4 LT |
331 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
332 | } \ | |
333 | \ | |
334 | /* Kernel symbol table: GPL-only symbols */ \ | |
335 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
336 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
b67067f1 | 337 | KEEP(*(SORT(___ksymtab_gpl+*))) \ |
1da177e4 LT |
338 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
339 | } \ | |
340 | \ | |
f71d20e9 AV |
341 | /* Kernel symbol table: Normal unused symbols */ \ |
342 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
343 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
b67067f1 | 344 | KEEP(*(SORT(___ksymtab_unused+*))) \ |
f71d20e9 AV |
345 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
346 | } \ | |
347 | \ | |
348 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
349 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
350 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
b67067f1 | 351 | KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ |
f71d20e9 AV |
352 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
353 | } \ | |
354 | \ | |
9f28bb7e GKH |
355 | /* Kernel symbol table: GPL-future-only symbols */ \ |
356 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
357 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
b67067f1 | 358 | KEEP(*(SORT(___ksymtab_gpl_future+*))) \ |
9f28bb7e GKH |
359 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
360 | } \ | |
361 | \ | |
1da177e4 LT |
362 | /* Kernel symbol table: Normal symbols */ \ |
363 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
364 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
b67067f1 | 365 | KEEP(*(SORT(___kcrctab+*))) \ |
1da177e4 LT |
366 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
367 | } \ | |
368 | \ | |
369 | /* Kernel symbol table: GPL-only symbols */ \ | |
370 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
371 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
b67067f1 | 372 | KEEP(*(SORT(___kcrctab_gpl+*))) \ |
1da177e4 LT |
373 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
374 | } \ | |
375 | \ | |
f71d20e9 AV |
376 | /* Kernel symbol table: Normal unused symbols */ \ |
377 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
378 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
b67067f1 | 379 | KEEP(*(SORT(___kcrctab_unused+*))) \ |
f71d20e9 AV |
380 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
381 | } \ | |
382 | \ | |
383 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
384 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
385 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
b67067f1 | 386 | KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ |
f71d20e9 AV |
387 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
388 | } \ | |
389 | \ | |
9f28bb7e GKH |
390 | /* Kernel symbol table: GPL-future-only symbols */ \ |
391 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
392 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
b67067f1 | 393 | KEEP(*(SORT(___kcrctab_gpl_future+*))) \ |
9f28bb7e GKH |
394 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
395 | } \ | |
396 | \ | |
1da177e4 LT |
397 | /* Kernel symbol table: strings */ \ |
398 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
4b89b7f7 | 399 | *(__ksymtab_strings) \ |
1da177e4 LT |
400 | } \ |
401 | \ | |
eb8f6890 SR |
402 | /* __*init sections */ \ |
403 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 404 | *(.ref.rodata) \ |
eb8f6890 SR |
405 | MEM_KEEP(init.rodata) \ |
406 | MEM_KEEP(exit.rodata) \ | |
407 | } \ | |
408 | \ | |
1da177e4 LT |
409 | /* Built-in module parameters. */ \ |
410 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
411 | VMLINUX_SYMBOL(__start___param) = .; \ | |
4b89b7f7 | 412 | KEEP(*(__param)) \ |
1da177e4 | 413 | VMLINUX_SYMBOL(__stop___param) = .; \ |
e94965ed DT |
414 | } \ |
415 | \ | |
416 | /* Built-in module versions. */ \ | |
417 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
418 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
4b89b7f7 | 419 | KEEP(*(__modver)) \ |
e94965ed | 420 | VMLINUX_SYMBOL(__stop___modver) = .; \ |
edeed305 | 421 | . = ALIGN((align)); \ |
6569580d | 422 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 423 | } \ |
4096b46f SR |
424 | . = ALIGN((align)); |
425 | ||
ef53dae8 | 426 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 427 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
428 | #define RODATA RO_DATA_SECTION(4096) |
429 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
430 | |
431 | #define SECURITY_INIT \ | |
60bad7fa | 432 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 | 433 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
b67067f1 | 434 | KEEP(*(.security_initcall.init)) \ |
1da177e4 LT |
435 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
436 | } | |
437 | ||
7664709b | 438 | /* .text section. Map to function alignment to avoid address changes |
0f4c4af0 NP |
439 | * during second ld run in second ld pass when generating System.map |
440 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -ffunction-sections generates | |
441 | * .text.identifier which needs to be pulled in with .text , but some | |
442 | * architectures define .text.foo which is not intended to be pulled in here. | |
443 | * Those enabling LD_DEAD_CODE_DATA_ELIMINATION must ensure they don't have | |
444 | * conflicting section names, and must pull in .text.[0-9a-zA-Z_]* */ | |
7664709b SR |
445 | #define TEXT_TEXT \ |
446 | ALIGN_FUNCTION(); \ | |
9bebe9e5 | 447 | *(.text.hot .text .text.fixup .text.unlikely) \ |
312b1485 | 448 | *(.ref.text) \ |
eb8f6890 | 449 | MEM_KEEP(init.text) \ |
fb5e2b37 | 450 | MEM_KEEP(exit.text) \ |
eb8f6890 | 451 | |
7664709b | 452 | |
6d30e3a8 SR |
453 | /* sched.text is aling to function alignment to secure we have same |
454 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 455 | #define SCHED_TEXT \ |
6d30e3a8 | 456 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
457 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
458 | *(.sched.text) \ | |
459 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
460 | ||
6d30e3a8 SR |
461 | /* spinlock.text is aling to function alignment to secure we have same |
462 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 463 | #define LOCK_TEXT \ |
6d30e3a8 | 464 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
465 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
466 | *(.spinlock.text) \ | |
467 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 | 468 | |
6727ad9e CM |
469 | #define CPUIDLE_TEXT \ |
470 | ALIGN_FUNCTION(); \ | |
471 | VMLINUX_SYMBOL(__cpuidle_text_start) = .; \ | |
472 | *(.cpuidle.text) \ | |
473 | VMLINUX_SYMBOL(__cpuidle_text_end) = .; | |
474 | ||
d0aaff97 PP |
475 | #define KPROBES_TEXT \ |
476 | ALIGN_FUNCTION(); \ | |
477 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
478 | *(.kprobes.text) \ | |
479 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 480 | |
ea714547 JO |
481 | #define ENTRY_TEXT \ |
482 | ALIGN_FUNCTION(); \ | |
483 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
484 | *(.entry.text) \ | |
485 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
486 | ||
be7635e7 | 487 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
a0343e82 FW |
488 | #define IRQENTRY_TEXT \ |
489 | ALIGN_FUNCTION(); \ | |
490 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
491 | *(.irqentry.text) \ | |
492 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
493 | #else | |
494 | #define IRQENTRY_TEXT | |
495 | #endif | |
496 | ||
be7635e7 AP |
497 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
498 | #define SOFTIRQENTRY_TEXT \ | |
499 | ALIGN_FUNCTION(); \ | |
500 | VMLINUX_SYMBOL(__softirqentry_text_start) = .; \ | |
501 | *(.softirqentry.text) \ | |
502 | VMLINUX_SYMBOL(__softirqentry_text_end) = .; | |
503 | #else | |
504 | #define SOFTIRQENTRY_TEXT | |
505 | #endif | |
506 | ||
37c514e3 | 507 | /* Section used for early init (in .S files) */ |
7923f90f | 508 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 509 | |
7923f90f | 510 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
511 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
512 | HEAD_TEXT \ | |
513 | } | |
514 | ||
515 | /* | |
516 | * Exception table | |
517 | */ | |
518 | #define EXCEPTION_TABLE(align) \ | |
519 | . = ALIGN(align); \ | |
520 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
521 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
4b89b7f7 | 522 | KEEP(*(__ex_table)) \ |
ef53dae8 SR |
523 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
524 | } | |
525 | ||
526 | /* | |
527 | * Init task | |
528 | */ | |
39a449d9 | 529 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 530 | . = ALIGN(align); \ |
da5e37ef | 531 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 532 | INIT_TASK_DATA(align) \ |
ef53dae8 | 533 | } |
37c514e3 | 534 | |
b99b87f7 | 535 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
536 | #define KERNEL_CTORS() . = ALIGN(8); \ |
537 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
4b89b7f7 NP |
538 | KEEP(*(.ctors)) \ |
539 | KEEP(*(SORT(.init_array.*))) \ | |
540 | KEEP(*(.init_array)) \ | |
b99b87f7 PO |
541 | VMLINUX_SYMBOL(__ctors_end) = .; |
542 | #else | |
543 | #define KERNEL_CTORS() | |
544 | #endif | |
545 | ||
01ba2bdc | 546 | /* init and exit section handling */ |
eb8f6890 | 547 | #define INIT_DATA \ |
b67067f1 | 548 | KEEP(*(SORT(___kentry+*))) \ |
eb8f6890 | 549 | *(.init.data) \ |
eb8f6890 | 550 | MEM_DISCARD(init.data) \ |
b99b87f7 | 551 | KERNEL_CTORS() \ |
4b3b4c5e | 552 | MCOUNT_REC() \ |
9fd49328 | 553 | *(.init.rodata) \ |
e4a9ea5e | 554 | FTRACE_EVENTS() \ |
3d56e331 | 555 | TRACE_SYSCALLS() \ |
376e2424 | 556 | KPROBE_BLACKLIST() \ |
aab94339 | 557 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 558 | CLK_OF_TABLES() \ |
f618c470 | 559 | RESERVEDMEM_OF_TABLES() \ |
ae278a93 | 560 | CLKSRC_OF_TABLES() \ |
8d09617b | 561 | CLKEVT_OF_TABLES() \ |
1cd076bf | 562 | IOMMU_OF_TABLES() \ |
6c3ff8b1 | 563 | CPU_METHOD_OF_TABLES() \ |
449e056c | 564 | CPUIDLE_METHOD_OF_TABLES() \ |
f6e916b8 | 565 | KERNEL_DTB() \ |
b0b6abd3 | 566 | IRQCHIP_OF_MATCH_TABLE() \ |
46e589a3 | 567 | ACPI_PROBE_TABLE(irqchip) \ |
c625f76a | 568 | ACPI_PROBE_TABLE(clksrc) \ |
2eaa7909 | 569 | EARLYCON_TABLE() |
eb8f6890 SR |
570 | |
571 | #define INIT_TEXT \ | |
572 | *(.init.text) \ | |
e41f501d | 573 | *(.text.startup) \ |
eb8f6890 SR |
574 | MEM_DISCARD(init.text) |
575 | ||
576 | #define EXIT_DATA \ | |
577 | *(.exit.data) \ | |
e41f501d DV |
578 | *(.fini_array) \ |
579 | *(.dtors) \ | |
eb8f6890 SR |
580 | MEM_DISCARD(exit.data) \ |
581 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 582 | |
eb8f6890 SR |
583 | #define EXIT_TEXT \ |
584 | *(.exit.text) \ | |
e41f501d | 585 | *(.text.exit) \ |
eb8f6890 | 586 | MEM_DISCARD(exit.text) |
01ba2bdc | 587 | |
7923f90f SR |
588 | #define EXIT_CALL \ |
589 | *(.exitcall.exit) | |
590 | ||
ef53dae8 SR |
591 | /* |
592 | * bss (Block Started by Symbol) - uninitialized data | |
593 | * zeroed during startup | |
594 | */ | |
04e448d9 TA |
595 | #define SBSS(sbss_align) \ |
596 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
597 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
598 | *(.sbss) \ | |
599 | *(.scommon) \ | |
600 | } | |
601 | ||
c87728ca DD |
602 | /* |
603 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
604 | * sections to the front of bss. | |
605 | */ | |
606 | #ifndef BSS_FIRST_SECTIONS | |
607 | #define BSS_FIRST_SECTIONS | |
608 | #endif | |
609 | ||
ef53dae8 SR |
610 | #define BSS(bss_align) \ |
611 | . = ALIGN(bss_align); \ | |
612 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 613 | BSS_FIRST_SECTIONS \ |
7c74df07 | 614 | *(.bss..page_aligned) \ |
ef53dae8 | 615 | *(.dynbss) \ |
b67067f1 | 616 | *(.bss .bss.[0-9a-zA-Z_]*) \ |
ef53dae8 | 617 | *(COMMON) \ |
ef53dae8 SR |
618 | } |
619 | ||
620 | /* | |
621 | * DWARF debug sections. | |
622 | * Symbols in the DWARF debugging sections are relative to | |
623 | * the beginning of the section so we begin them at 0. | |
624 | */ | |
a7d0c210 PBG |
625 | #define DWARF_DEBUG \ |
626 | /* DWARF 1 */ \ | |
627 | .debug 0 : { *(.debug) } \ | |
628 | .line 0 : { *(.line) } \ | |
629 | /* GNU DWARF 1 extensions */ \ | |
630 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
631 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
632 | /* DWARF 1.1 and DWARF 2 */ \ | |
633 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
634 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
635 | /* DWARF 2 */ \ | |
636 | .debug_info 0 : { *(.debug_info \ | |
637 | .gnu.linkonce.wi.*) } \ | |
638 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
639 | .debug_line 0 : { *(.debug_line) } \ | |
640 | .debug_frame 0 : { *(.debug_frame) } \ | |
641 | .debug_str 0 : { *(.debug_str) } \ | |
642 | .debug_loc 0 : { *(.debug_loc) } \ | |
643 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
644 | /* SGI/MIPS DWARF 2 extensions */ \ | |
645 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
646 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
647 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
648 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
649 | ||
650 | /* Stabs debugging sections. */ | |
651 | #define STABS_DEBUG \ | |
652 | .stab 0 : { *(.stab) } \ | |
653 | .stabstr 0 : { *(.stabstr) } \ | |
654 | .stab.excl 0 : { *(.stab.excl) } \ | |
655 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
656 | .stab.index 0 : { *(.stab.index) } \ | |
657 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
658 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 659 | |
6360b1fb | 660 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
661 | #define BUG_TABLE \ |
662 | . = ALIGN(8); \ | |
663 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 664 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
4b89b7f7 | 665 | KEEP(*(__bug_table)) \ |
c6de0026 | 666 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 667 | } |
6360b1fb JB |
668 | #else |
669 | #define BUG_TABLE | |
670 | #endif | |
7664c5a1 | 671 | |
63687a52 JB |
672 | #ifdef CONFIG_PM_TRACE |
673 | #define TRACEDATA \ | |
674 | . = ALIGN(4); \ | |
675 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 676 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
4b89b7f7 | 677 | KEEP(*(.tracedata)) \ |
c6de0026 | 678 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
679 | } |
680 | #else | |
681 | #define TRACEDATA | |
682 | #endif | |
683 | ||
9c9b8b38 | 684 | #define NOTES \ |
cbe87121 RM |
685 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
686 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
687 | *(.note.*) \ | |
688 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
689 | } | |
61ce1efe | 690 | |
ef53dae8 SR |
691 | #define INIT_SETUP(initsetup_align) \ |
692 | . = ALIGN(initsetup_align); \ | |
693 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
4b89b7f7 | 694 | KEEP(*(.init.setup)) \ |
ef53dae8 SR |
695 | VMLINUX_SYMBOL(__setup_end) = .; |
696 | ||
026cee00 PM |
697 | #define INIT_CALLS_LEVEL(level) \ |
698 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
b67067f1 NP |
699 | KEEP(*(.initcall##level##.init)) \ |
700 | KEEP(*(.initcall##level##s.init)) \ | |
61ce1efe | 701 | |
ef53dae8 SR |
702 | #define INIT_CALLS \ |
703 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
b67067f1 | 704 | KEEP(*(.initcallearly.init)) \ |
026cee00 PM |
705 | INIT_CALLS_LEVEL(0) \ |
706 | INIT_CALLS_LEVEL(1) \ | |
707 | INIT_CALLS_LEVEL(2) \ | |
708 | INIT_CALLS_LEVEL(3) \ | |
709 | INIT_CALLS_LEVEL(4) \ | |
710 | INIT_CALLS_LEVEL(5) \ | |
711 | INIT_CALLS_LEVEL(rootfs) \ | |
712 | INIT_CALLS_LEVEL(6) \ | |
713 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
714 | VMLINUX_SYMBOL(__initcall_end) = .; |
715 | ||
716 | #define CON_INITCALL \ | |
717 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
b67067f1 | 718 | KEEP(*(.con_initcall.init)) \ |
ef53dae8 SR |
719 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
720 | ||
721 | #define SECURITY_INITCALL \ | |
722 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
b67067f1 | 723 | KEEP(*(.security_initcall.init)) \ |
ef53dae8 SR |
724 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
725 | ||
726 | #ifdef CONFIG_BLK_DEV_INITRD | |
727 | #define INIT_RAM_FS \ | |
d8826262 | 728 | . = ALIGN(4); \ |
ef53dae8 | 729 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
b67067f1 | 730 | KEEP(*(.init.ramfs)) \ |
ffe8018c | 731 | . = ALIGN(8); \ |
b67067f1 | 732 | KEEP(*(.init.ramfs.info)) |
ef53dae8 | 733 | #else |
eadfe219 | 734 | #define INIT_RAM_FS |
ef53dae8 SR |
735 | #endif |
736 | ||
023bf6f1 TH |
737 | /* |
738 | * Default discarded sections. | |
739 | * | |
740 | * Some archs want to discard exit text/data at runtime rather than | |
741 | * link time due to cross-section references such as alt instructions, | |
742 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
743 | * section definitions so that such archs put those in earlier section | |
744 | * definitions. | |
745 | */ | |
405d967d TH |
746 | #define DISCARDS \ |
747 | /DISCARD/ : { \ | |
748 | EXIT_TEXT \ | |
749 | EXIT_DATA \ | |
023bf6f1 | 750 | EXIT_CALL \ |
405d967d | 751 | *(.discard) \ |
c7f52cdc | 752 | *(.discard.*) \ |
405d967d TH |
753 | } |
754 | ||
6ea0c34d MF |
755 | /** |
756 | * PERCPU_INPUT - the percpu input sections | |
757 | * @cacheline: cacheline size | |
758 | * | |
759 | * The core percpu section names and core symbols which do not rely | |
760 | * directly upon load addresses. | |
761 | * | |
762 | * @cacheline is used to align subsections to avoid false cacheline | |
763 | * sharing between subsections for different purposes. | |
764 | */ | |
765 | #define PERCPU_INPUT(cacheline) \ | |
766 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
767 | *(.data..percpu..first) \ | |
768 | . = ALIGN(PAGE_SIZE); \ | |
769 | *(.data..percpu..page_aligned) \ | |
770 | . = ALIGN(cacheline); \ | |
330d2822 | 771 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
772 | . = ALIGN(cacheline); \ |
773 | *(.data..percpu) \ | |
774 | *(.data..percpu..shared_aligned) \ | |
775 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
776 | ||
3e5d8f97 | 777 | /** |
6b7c38d5 | 778 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 779 | * @cacheline: cacheline size |
3e5d8f97 TH |
780 | * @vaddr: explicit base address (optional) |
781 | * @phdr: destination PHDR (optional) | |
782 | * | |
19df0c2f TH |
783 | * Macro which expands to output section for percpu area. |
784 | * | |
785 | * @cacheline is used to align subsections to avoid false cacheline | |
786 | * sharing between subsections for different purposes. | |
787 | * | |
788 | * If @vaddr is not blank, it specifies explicit base address and all | |
789 | * percpu symbols will be offset from the given address. If blank, | |
790 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
791 | * |
792 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
793 | * output PHDR is sticky. If @phdr is specified, the next output | |
794 | * section in the linker script will go there too. @phdr should have | |
795 | * a leading colon. | |
796 | * | |
3ac6cffe TH |
797 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
798 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 799 | * address, use PERCPU_SECTION. |
3e5d8f97 | 800 | */ |
19df0c2f | 801 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 802 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 803 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 804 | - LOAD_OFFSET) { \ |
6ea0c34d | 805 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 806 | } phdr \ |
3d9a854c | 807 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
808 | |
809 | /** | |
0415b00d | 810 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 811 | * @cacheline: cacheline size |
3e5d8f97 | 812 | * |
0415b00d TH |
813 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
814 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 815 | * __per_cpu_start will be identical. |
3ac6cffe | 816 | * |
0415b00d | 817 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
818 | * except that __per_cpu_load is defined as a relative symbol against |
819 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 820 | */ |
0415b00d TH |
821 | #define PERCPU_SECTION(cacheline) \ |
822 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 823 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 824 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 825 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 826 | } |
ef53dae8 SR |
827 | |
828 | ||
829 | /* | |
830 | * Definition of the high level *_SECTION macros | |
831 | * They will fit only a subset of the architectures | |
832 | */ | |
833 | ||
834 | ||
835 | /* | |
836 | * Writeable data. | |
837 | * All sections are combined in a single .data section. | |
838 | * The sections following CONSTRUCTORS are arranged so their | |
839 | * typical alignment matches. | |
840 | * A cacheline is typical/always less than a PAGE_SIZE so | |
841 | * the sections that has this restriction (or similar) | |
842 | * is located before the ones requiring PAGE_SIZE alignment. | |
843 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 844 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 845 | * |
7923f90f | 846 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 847 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
848 | . = ALIGN(PAGE_SIZE); \ |
849 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 850 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
851 | NOSAVE_DATA \ |
852 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
853 | CACHELINE_ALIGNED_DATA(cacheline) \ |
854 | READ_MOSTLY_DATA(cacheline) \ | |
855 | DATA_DATA \ | |
856 | CONSTRUCTORS \ | |
19d43626 PZ |
857 | } \ |
858 | BUG_TABLE | |
ef53dae8 SR |
859 | |
860 | #define INIT_TEXT_SECTION(inittext_align) \ | |
861 | . = ALIGN(inittext_align); \ | |
862 | .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \ | |
863 | VMLINUX_SYMBOL(_sinittext) = .; \ | |
864 | INIT_TEXT \ | |
865 | VMLINUX_SYMBOL(_einittext) = .; \ | |
866 | } | |
867 | ||
868 | #define INIT_DATA_SECTION(initsetup_align) \ | |
869 | .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \ | |
870 | INIT_DATA \ | |
871 | INIT_SETUP(initsetup_align) \ | |
872 | INIT_CALLS \ | |
873 | CON_INITCALL \ | |
874 | SECURITY_INITCALL \ | |
875 | INIT_RAM_FS \ | |
876 | } | |
877 | ||
04e448d9 TA |
878 | #define BSS_SECTION(sbss_align, bss_align, stop_align) \ |
879 | . = ALIGN(sbss_align); \ | |
880 | VMLINUX_SYMBOL(__bss_start) = .; \ | |
881 | SBSS(sbss_align) \ | |
ef53dae8 | 882 | BSS(bss_align) \ |
04e448d9 TA |
883 | . = ALIGN(stop_align); \ |
884 | VMLINUX_SYMBOL(__bss_stop) = .; |