Commit | Line | Data |
---|---|---|
ef53dae8 SR |
1 | /* |
2 | * Helper macros to support writing architecture specific | |
3 | * linker scripts. | |
4 | * | |
5 | * A minimal linker scripts has following content: | |
6 | * [This is a sample, architectures may have special requiriements] | |
7 | * | |
8 | * OUTPUT_FORMAT(...) | |
9 | * OUTPUT_ARCH(...) | |
10 | * ENTRY(...) | |
11 | * SECTIONS | |
12 | * { | |
13 | * . = START; | |
14 | * __init_begin = .; | |
7923f90f | 15 | * HEAD_TEXT_SECTION |
ef53dae8 SR |
16 | * INIT_TEXT_SECTION(PAGE_SIZE) |
17 | * INIT_DATA_SECTION(...) | |
0415b00d | 18 | * PERCPU_SECTION(CACHELINE_SIZE) |
ef53dae8 SR |
19 | * __init_end = .; |
20 | * | |
21 | * _stext = .; | |
22 | * TEXT_SECTION = 0 | |
23 | * _etext = .; | |
24 | * | |
25 | * _sdata = .; | |
26 | * RO_DATA_SECTION(PAGE_SIZE) | |
27 | * RW_DATA_SECTION(...) | |
28 | * _edata = .; | |
29 | * | |
30 | * EXCEPTION_TABLE(...) | |
31 | * NOTES | |
32 | * | |
04e448d9 | 33 | * BSS_SECTION(0, 0, 0) |
ef53dae8 SR |
34 | * _end = .; |
35 | * | |
ef53dae8 SR |
36 | * STABS_DEBUG |
37 | * DWARF_DEBUG | |
023bf6f1 TH |
38 | * |
39 | * DISCARDS // must be the last | |
ef53dae8 SR |
40 | * } |
41 | * | |
42 | * [__init_begin, __init_end] is the init section that may be freed after init | |
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) | |
176 | #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip) | |
177 | #define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk) | |
1cd076bf | 178 | #define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu) |
06309288 RH |
179 | #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem) |
180 | #define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method) | |
449e056c | 181 | #define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method) |
6c3ff8b1 | 182 | |
e647b532 MZ |
183 | #ifdef CONFIG_ACPI |
184 | #define ACPI_PROBE_TABLE(name) \ | |
185 | . = ALIGN(8); \ | |
186 | VMLINUX_SYMBOL(__##name##_acpi_probe_table) = .; \ | |
4b89b7f7 | 187 | KEEP(*(__##name##_acpi_probe_table)) \ |
e647b532 MZ |
188 | VMLINUX_SYMBOL(__##name##_acpi_probe_table_end) = .; |
189 | #else | |
190 | #define ACPI_PROBE_TABLE(name) | |
191 | #endif | |
192 | ||
aab94339 DB |
193 | #define KERNEL_DTB() \ |
194 | STRUCT_ALIGN(); \ | |
195 | VMLINUX_SYMBOL(__dtb_start) = .; \ | |
4b89b7f7 | 196 | KEEP(*(.dtb.init.rodata)) \ |
aab94339 DB |
197 | VMLINUX_SYMBOL(__dtb_end) = .; |
198 | ||
b67067f1 NP |
199 | /* |
200 | * .data section | |
0f4c4af0 NP |
201 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -fdata-sections generates |
202 | * .data.identifier which needs to be pulled in with .data, but don't want to | |
203 | * pull in .data..stuff which has its own requirements. Same for bss. | |
b67067f1 | 204 | */ |
ca967258 | 205 | #define DATA_DATA \ |
b67067f1 | 206 | *(.data .data.[0-9a-zA-Z_]*) \ |
312b1485 | 207 | *(.ref.data) \ |
d356c0b6 | 208 | *(.data..shared_aligned) /* percpu related */ \ |
eb8f6890 SR |
209 | MEM_KEEP(init.data) \ |
210 | MEM_KEEP(exit.data) \ | |
7ccaba53 | 211 | *(.data.unlikely) \ |
65498646 | 212 | STRUCT_ALIGN(); \ |
97e1c18e | 213 | *(__tracepoints) \ |
e9d376f0 | 214 | /* implement dynamic printk debug */ \ |
d430d3d7 JB |
215 | . = ALIGN(8); \ |
216 | VMLINUX_SYMBOL(__start___jump_table) = .; \ | |
4b89b7f7 | 217 | KEEP(*(__jump_table)) \ |
d430d3d7 | 218 | VMLINUX_SYMBOL(__stop___jump_table) = .; \ |
e9d376f0 JB |
219 | . = ALIGN(8); \ |
220 | VMLINUX_SYMBOL(__start___verbose) = .; \ | |
4b89b7f7 | 221 | KEEP(*(__verbose)) \ |
e9d376f0 | 222 | VMLINUX_SYMBOL(__stop___verbose) = .; \ |
2bcd521a | 223 | LIKELY_PROFILE() \ |
b77e38aa | 224 | BRANCH_PROFILE() \ |
102c9323 SRRH |
225 | TRACE_PRINTKS() \ |
226 | TRACEPOINT_STR() | |
ca967258 | 227 | |
ef53dae8 SR |
228 | /* |
229 | * Data section helpers | |
230 | */ | |
231 | #define NOSAVE_DATA \ | |
232 | . = ALIGN(PAGE_SIZE); \ | |
233 | VMLINUX_SYMBOL(__nosave_begin) = .; \ | |
07b3bb1e | 234 | *(.data..nosave) \ |
ef53dae8 SR |
235 | . = ALIGN(PAGE_SIZE); \ |
236 | VMLINUX_SYMBOL(__nosave_end) = .; | |
237 | ||
238 | #define PAGE_ALIGNED_DATA(page_align) \ | |
239 | . = ALIGN(page_align); \ | |
75b13483 | 240 | *(.data..page_aligned) |
ef53dae8 SR |
241 | |
242 | #define READ_MOSTLY_DATA(align) \ | |
243 | . = ALIGN(align); \ | |
8369744f SL |
244 | *(.data..read_mostly) \ |
245 | . = ALIGN(align); | |
ef53dae8 SR |
246 | |
247 | #define CACHELINE_ALIGNED_DATA(align) \ | |
248 | . = ALIGN(align); \ | |
4af57b78 | 249 | *(.data..cacheline_aligned) |
ef53dae8 | 250 | |
39a449d9 | 251 | #define INIT_TASK_DATA(align) \ |
ef53dae8 | 252 | . = ALIGN(align); \ |
91ed140d BP |
253 | VMLINUX_SYMBOL(__start_init_task) = .; \ |
254 | *(.data..init_task) \ | |
255 | VMLINUX_SYMBOL(__end_init_task) = .; | |
ef53dae8 | 256 | |
32fb2fc5 HC |
257 | /* |
258 | * Allow architectures to handle ro_after_init data on their | |
259 | * own by defining an empty RO_AFTER_INIT_DATA. | |
260 | */ | |
261 | #ifndef RO_AFTER_INIT_DATA | |
d7c19b06 JK |
262 | #define RO_AFTER_INIT_DATA \ |
263 | __start_data_ro_after_init = .; \ | |
264 | *(.data..ro_after_init) \ | |
265 | __end_data_ro_after_init = .; | |
32fb2fc5 HC |
266 | #endif |
267 | ||
ef53dae8 SR |
268 | /* |
269 | * Read only Data | |
270 | */ | |
271 | #define RO_DATA_SECTION(align) \ | |
4096b46f | 272 | . = ALIGN((align)); \ |
1da177e4 | 273 | .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \ |
6569580d | 274 | VMLINUX_SYMBOL(__start_rodata) = .; \ |
1da177e4 | 275 | *(.rodata) *(.rodata.*) \ |
32fb2fc5 | 276 | RO_AFTER_INIT_DATA /* Read only after init */ \ |
4b89b7f7 | 277 | KEEP(*(__vermagic)) /* Kernel version magic */ \ |
65498646 MD |
278 | . = ALIGN(8); \ |
279 | VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \ | |
4b89b7f7 | 280 | KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \ |
65498646 | 281 | VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \ |
97e1c18e | 282 | *(__tracepoints_strings)/* Tracepoints: strings */ \ |
1da177e4 LT |
283 | } \ |
284 | \ | |
285 | .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \ | |
286 | *(.rodata1) \ | |
287 | } \ | |
288 | \ | |
6360b1fb JB |
289 | BUG_TABLE \ |
290 | \ | |
1da177e4 LT |
291 | /* PCI quirks */ \ |
292 | .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \ | |
293 | VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \ | |
4b89b7f7 | 294 | KEEP(*(.pci_fixup_early)) \ |
1da177e4 LT |
295 | VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \ |
296 | VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \ | |
4b89b7f7 | 297 | KEEP(*(.pci_fixup_header)) \ |
1da177e4 LT |
298 | VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \ |
299 | VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \ | |
4b89b7f7 | 300 | KEEP(*(.pci_fixup_final)) \ |
1da177e4 LT |
301 | VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \ |
302 | VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \ | |
4b89b7f7 | 303 | KEEP(*(.pci_fixup_enable)) \ |
1da177e4 | 304 | VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \ |
1597cacb | 305 | VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \ |
4b89b7f7 | 306 | KEEP(*(.pci_fixup_resume)) \ |
1597cacb | 307 | VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \ |
e1a2a51e | 308 | VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \ |
4b89b7f7 | 309 | KEEP(*(.pci_fixup_resume_early)) \ |
e1a2a51e RW |
310 | VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \ |
311 | VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \ | |
4b89b7f7 | 312 | KEEP(*(.pci_fixup_suspend)) \ |
e1a2a51e | 313 | VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \ |
7d2a01b8 | 314 | VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \ |
4b89b7f7 | 315 | KEEP(*(.pci_fixup_suspend_late)) \ |
7d2a01b8 | 316 | VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \ |
1da177e4 LT |
317 | } \ |
318 | \ | |
5658c769 DW |
319 | /* Built-in firmware blobs */ \ |
320 | .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \ | |
321 | VMLINUX_SYMBOL(__start_builtin_fw) = .; \ | |
4b89b7f7 | 322 | KEEP(*(.builtin_fw)) \ |
5658c769 DW |
323 | VMLINUX_SYMBOL(__end_builtin_fw) = .; \ |
324 | } \ | |
325 | \ | |
63687a52 JB |
326 | TRACEDATA \ |
327 | \ | |
1da177e4 LT |
328 | /* Kernel symbol table: Normal symbols */ \ |
329 | __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \ | |
330 | VMLINUX_SYMBOL(__start___ksymtab) = .; \ | |
b67067f1 | 331 | KEEP(*(SORT(___ksymtab+*))) \ |
1da177e4 LT |
332 | VMLINUX_SYMBOL(__stop___ksymtab) = .; \ |
333 | } \ | |
334 | \ | |
335 | /* Kernel symbol table: GPL-only symbols */ \ | |
336 | __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \ | |
337 | VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \ | |
b67067f1 | 338 | KEEP(*(SORT(___ksymtab_gpl+*))) \ |
1da177e4 LT |
339 | VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ |
340 | } \ | |
341 | \ | |
f71d20e9 AV |
342 | /* Kernel symbol table: Normal unused symbols */ \ |
343 | __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \ | |
344 | VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \ | |
b67067f1 | 345 | KEEP(*(SORT(___ksymtab_unused+*))) \ |
f71d20e9 AV |
346 | VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \ |
347 | } \ | |
348 | \ | |
349 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
350 | __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \ | |
351 | VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \ | |
b67067f1 | 352 | KEEP(*(SORT(___ksymtab_unused_gpl+*))) \ |
f71d20e9 AV |
353 | VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \ |
354 | } \ | |
355 | \ | |
9f28bb7e GKH |
356 | /* Kernel symbol table: GPL-future-only symbols */ \ |
357 | __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ | |
358 | VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ | |
b67067f1 | 359 | KEEP(*(SORT(___ksymtab_gpl_future+*))) \ |
9f28bb7e GKH |
360 | VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ |
361 | } \ | |
362 | \ | |
1da177e4 LT |
363 | /* Kernel symbol table: Normal symbols */ \ |
364 | __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ | |
365 | VMLINUX_SYMBOL(__start___kcrctab) = .; \ | |
b67067f1 | 366 | KEEP(*(SORT(___kcrctab+*))) \ |
1da177e4 LT |
367 | VMLINUX_SYMBOL(__stop___kcrctab) = .; \ |
368 | } \ | |
369 | \ | |
370 | /* Kernel symbol table: GPL-only symbols */ \ | |
371 | __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \ | |
372 | VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \ | |
b67067f1 | 373 | KEEP(*(SORT(___kcrctab_gpl+*))) \ |
1da177e4 LT |
374 | VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ |
375 | } \ | |
376 | \ | |
f71d20e9 AV |
377 | /* Kernel symbol table: Normal unused symbols */ \ |
378 | __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \ | |
379 | VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \ | |
b67067f1 | 380 | KEEP(*(SORT(___kcrctab_unused+*))) \ |
f71d20e9 AV |
381 | VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \ |
382 | } \ | |
383 | \ | |
384 | /* Kernel symbol table: GPL-only unused symbols */ \ | |
385 | __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \ | |
386 | VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \ | |
b67067f1 | 387 | KEEP(*(SORT(___kcrctab_unused_gpl+*))) \ |
f71d20e9 AV |
388 | VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \ |
389 | } \ | |
390 | \ | |
9f28bb7e GKH |
391 | /* Kernel symbol table: GPL-future-only symbols */ \ |
392 | __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ | |
393 | VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ | |
b67067f1 | 394 | KEEP(*(SORT(___kcrctab_gpl_future+*))) \ |
9f28bb7e GKH |
395 | VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ |
396 | } \ | |
397 | \ | |
1da177e4 LT |
398 | /* Kernel symbol table: strings */ \ |
399 | __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ | |
4b89b7f7 | 400 | *(__ksymtab_strings) \ |
1da177e4 LT |
401 | } \ |
402 | \ | |
eb8f6890 SR |
403 | /* __*init sections */ \ |
404 | __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \ | |
312b1485 | 405 | *(.ref.rodata) \ |
eb8f6890 SR |
406 | MEM_KEEP(init.rodata) \ |
407 | MEM_KEEP(exit.rodata) \ | |
408 | } \ | |
409 | \ | |
1da177e4 LT |
410 | /* Built-in module parameters. */ \ |
411 | __param : AT(ADDR(__param) - LOAD_OFFSET) { \ | |
412 | VMLINUX_SYMBOL(__start___param) = .; \ | |
4b89b7f7 | 413 | KEEP(*(__param)) \ |
1da177e4 | 414 | VMLINUX_SYMBOL(__stop___param) = .; \ |
e94965ed DT |
415 | } \ |
416 | \ | |
417 | /* Built-in module versions. */ \ | |
418 | __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \ | |
419 | VMLINUX_SYMBOL(__start___modver) = .; \ | |
4b89b7f7 | 420 | KEEP(*(__modver)) \ |
e94965ed | 421 | VMLINUX_SYMBOL(__stop___modver) = .; \ |
edeed305 | 422 | . = ALIGN((align)); \ |
6569580d | 423 | VMLINUX_SYMBOL(__end_rodata) = .; \ |
7583ddfd | 424 | } \ |
4096b46f SR |
425 | . = ALIGN((align)); |
426 | ||
ef53dae8 | 427 | /* RODATA & RO_DATA provided for backward compatibility. |
4096b46f | 428 | * All archs are supposed to use RO_DATA() */ |
ef53dae8 SR |
429 | #define RODATA RO_DATA_SECTION(4096) |
430 | #define RO_DATA(align) RO_DATA_SECTION(align) | |
1da177e4 LT |
431 | |
432 | #define SECURITY_INIT \ | |
60bad7fa | 433 | .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \ |
1da177e4 | 434 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ |
b67067f1 | 435 | KEEP(*(.security_initcall.init)) \ |
1da177e4 LT |
436 | VMLINUX_SYMBOL(__security_initcall_end) = .; \ |
437 | } | |
438 | ||
7664709b | 439 | /* .text section. Map to function alignment to avoid address changes |
0f4c4af0 NP |
440 | * during second ld run in second ld pass when generating System.map |
441 | * LD_DEAD_CODE_DATA_ELIMINATION option enables -ffunction-sections generates | |
442 | * .text.identifier which needs to be pulled in with .text , but some | |
443 | * architectures define .text.foo which is not intended to be pulled in here. | |
444 | * Those enabling LD_DEAD_CODE_DATA_ELIMINATION must ensure they don't have | |
445 | * conflicting section names, and must pull in .text.[0-9a-zA-Z_]* */ | |
7664709b SR |
446 | #define TEXT_TEXT \ |
447 | ALIGN_FUNCTION(); \ | |
9bebe9e5 | 448 | *(.text.hot .text .text.fixup .text.unlikely) \ |
312b1485 | 449 | *(.ref.text) \ |
eb8f6890 | 450 | MEM_KEEP(init.text) \ |
fb5e2b37 | 451 | MEM_KEEP(exit.text) \ |
eb8f6890 | 452 | |
7664709b | 453 | |
6d30e3a8 SR |
454 | /* sched.text is aling to function alignment to secure we have same |
455 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 456 | #define SCHED_TEXT \ |
6d30e3a8 | 457 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
458 | VMLINUX_SYMBOL(__sched_text_start) = .; \ |
459 | *(.sched.text) \ | |
460 | VMLINUX_SYMBOL(__sched_text_end) = .; | |
461 | ||
6d30e3a8 SR |
462 | /* spinlock.text is aling to function alignment to secure we have same |
463 | * address even at second ld pass when generating System.map */ | |
1da177e4 | 464 | #define LOCK_TEXT \ |
6d30e3a8 | 465 | ALIGN_FUNCTION(); \ |
1da177e4 LT |
466 | VMLINUX_SYMBOL(__lock_text_start) = .; \ |
467 | *(.spinlock.text) \ | |
468 | VMLINUX_SYMBOL(__lock_text_end) = .; | |
d0aaff97 | 469 | |
6727ad9e CM |
470 | #define CPUIDLE_TEXT \ |
471 | ALIGN_FUNCTION(); \ | |
472 | VMLINUX_SYMBOL(__cpuidle_text_start) = .; \ | |
473 | *(.cpuidle.text) \ | |
474 | VMLINUX_SYMBOL(__cpuidle_text_end) = .; | |
475 | ||
d0aaff97 PP |
476 | #define KPROBES_TEXT \ |
477 | ALIGN_FUNCTION(); \ | |
478 | VMLINUX_SYMBOL(__kprobes_text_start) = .; \ | |
479 | *(.kprobes.text) \ | |
480 | VMLINUX_SYMBOL(__kprobes_text_end) = .; | |
a7d0c210 | 481 | |
ea714547 JO |
482 | #define ENTRY_TEXT \ |
483 | ALIGN_FUNCTION(); \ | |
484 | VMLINUX_SYMBOL(__entry_text_start) = .; \ | |
485 | *(.entry.text) \ | |
486 | VMLINUX_SYMBOL(__entry_text_end) = .; | |
487 | ||
be7635e7 | 488 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
a0343e82 FW |
489 | #define IRQENTRY_TEXT \ |
490 | ALIGN_FUNCTION(); \ | |
491 | VMLINUX_SYMBOL(__irqentry_text_start) = .; \ | |
492 | *(.irqentry.text) \ | |
493 | VMLINUX_SYMBOL(__irqentry_text_end) = .; | |
494 | #else | |
495 | #define IRQENTRY_TEXT | |
496 | #endif | |
497 | ||
be7635e7 AP |
498 | #if defined(CONFIG_FUNCTION_GRAPH_TRACER) || defined(CONFIG_KASAN) |
499 | #define SOFTIRQENTRY_TEXT \ | |
500 | ALIGN_FUNCTION(); \ | |
501 | VMLINUX_SYMBOL(__softirqentry_text_start) = .; \ | |
502 | *(.softirqentry.text) \ | |
503 | VMLINUX_SYMBOL(__softirqentry_text_end) = .; | |
504 | #else | |
505 | #define SOFTIRQENTRY_TEXT | |
506 | #endif | |
507 | ||
37c514e3 | 508 | /* Section used for early init (in .S files) */ |
7923f90f | 509 | #define HEAD_TEXT *(.head.text) |
37c514e3 | 510 | |
7923f90f | 511 | #define HEAD_TEXT_SECTION \ |
ef53dae8 SR |
512 | .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \ |
513 | HEAD_TEXT \ | |
514 | } | |
515 | ||
516 | /* | |
517 | * Exception table | |
518 | */ | |
519 | #define EXCEPTION_TABLE(align) \ | |
520 | . = ALIGN(align); \ | |
521 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \ | |
522 | VMLINUX_SYMBOL(__start___ex_table) = .; \ | |
4b89b7f7 | 523 | KEEP(*(__ex_table)) \ |
ef53dae8 SR |
524 | VMLINUX_SYMBOL(__stop___ex_table) = .; \ |
525 | } | |
526 | ||
527 | /* | |
528 | * Init task | |
529 | */ | |
39a449d9 | 530 | #define INIT_TASK_DATA_SECTION(align) \ |
ef53dae8 | 531 | . = ALIGN(align); \ |
da5e37ef | 532 | .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \ |
39a449d9 | 533 | INIT_TASK_DATA(align) \ |
ef53dae8 | 534 | } |
37c514e3 | 535 | |
b99b87f7 | 536 | #ifdef CONFIG_CONSTRUCTORS |
2a2325e6 HC |
537 | #define KERNEL_CTORS() . = ALIGN(8); \ |
538 | VMLINUX_SYMBOL(__ctors_start) = .; \ | |
4b89b7f7 NP |
539 | KEEP(*(.ctors)) \ |
540 | KEEP(*(SORT(.init_array.*))) \ | |
541 | KEEP(*(.init_array)) \ | |
b99b87f7 PO |
542 | VMLINUX_SYMBOL(__ctors_end) = .; |
543 | #else | |
544 | #define KERNEL_CTORS() | |
545 | #endif | |
546 | ||
01ba2bdc | 547 | /* init and exit section handling */ |
eb8f6890 | 548 | #define INIT_DATA \ |
b67067f1 | 549 | KEEP(*(SORT(___kentry+*))) \ |
eb8f6890 | 550 | *(.init.data) \ |
eb8f6890 | 551 | MEM_DISCARD(init.data) \ |
b99b87f7 | 552 | KERNEL_CTORS() \ |
4b3b4c5e | 553 | MCOUNT_REC() \ |
9fd49328 | 554 | *(.init.rodata) \ |
e4a9ea5e | 555 | FTRACE_EVENTS() \ |
3d56e331 | 556 | TRACE_SYSCALLS() \ |
376e2424 | 557 | KPROBE_BLACKLIST() \ |
aab94339 | 558 | MEM_DISCARD(init.rodata) \ |
f2f6c255 | 559 | CLK_OF_TABLES() \ |
f618c470 | 560 | RESERVEDMEM_OF_TABLES() \ |
ae278a93 | 561 | CLKSRC_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) \ |
34ceea27 | 569 | ACPI_PROBE_TABLE(iort) \ |
2eaa7909 | 570 | EARLYCON_TABLE() |
eb8f6890 SR |
571 | |
572 | #define INIT_TEXT \ | |
573 | *(.init.text) \ | |
e41f501d | 574 | *(.text.startup) \ |
eb8f6890 SR |
575 | MEM_DISCARD(init.text) |
576 | ||
577 | #define EXIT_DATA \ | |
578 | *(.exit.data) \ | |
e41f501d DV |
579 | *(.fini_array) \ |
580 | *(.dtors) \ | |
eb8f6890 SR |
581 | MEM_DISCARD(exit.data) \ |
582 | MEM_DISCARD(exit.rodata) | |
01ba2bdc | 583 | |
eb8f6890 SR |
584 | #define EXIT_TEXT \ |
585 | *(.exit.text) \ | |
e41f501d | 586 | *(.text.exit) \ |
eb8f6890 | 587 | MEM_DISCARD(exit.text) |
01ba2bdc | 588 | |
7923f90f SR |
589 | #define EXIT_CALL \ |
590 | *(.exitcall.exit) | |
591 | ||
ef53dae8 SR |
592 | /* |
593 | * bss (Block Started by Symbol) - uninitialized data | |
594 | * zeroed during startup | |
595 | */ | |
04e448d9 TA |
596 | #define SBSS(sbss_align) \ |
597 | . = ALIGN(sbss_align); \ | |
ef53dae8 SR |
598 | .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \ |
599 | *(.sbss) \ | |
600 | *(.scommon) \ | |
601 | } | |
602 | ||
c87728ca DD |
603 | /* |
604 | * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra | |
605 | * sections to the front of bss. | |
606 | */ | |
607 | #ifndef BSS_FIRST_SECTIONS | |
608 | #define BSS_FIRST_SECTIONS | |
609 | #endif | |
610 | ||
ef53dae8 SR |
611 | #define BSS(bss_align) \ |
612 | . = ALIGN(bss_align); \ | |
613 | .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \ | |
c87728ca | 614 | BSS_FIRST_SECTIONS \ |
7c74df07 | 615 | *(.bss..page_aligned) \ |
ef53dae8 | 616 | *(.dynbss) \ |
b67067f1 | 617 | *(.bss .bss.[0-9a-zA-Z_]*) \ |
ef53dae8 | 618 | *(COMMON) \ |
ef53dae8 SR |
619 | } |
620 | ||
621 | /* | |
622 | * DWARF debug sections. | |
623 | * Symbols in the DWARF debugging sections are relative to | |
624 | * the beginning of the section so we begin them at 0. | |
625 | */ | |
a7d0c210 PBG |
626 | #define DWARF_DEBUG \ |
627 | /* DWARF 1 */ \ | |
628 | .debug 0 : { *(.debug) } \ | |
629 | .line 0 : { *(.line) } \ | |
630 | /* GNU DWARF 1 extensions */ \ | |
631 | .debug_srcinfo 0 : { *(.debug_srcinfo) } \ | |
632 | .debug_sfnames 0 : { *(.debug_sfnames) } \ | |
633 | /* DWARF 1.1 and DWARF 2 */ \ | |
634 | .debug_aranges 0 : { *(.debug_aranges) } \ | |
635 | .debug_pubnames 0 : { *(.debug_pubnames) } \ | |
636 | /* DWARF 2 */ \ | |
637 | .debug_info 0 : { *(.debug_info \ | |
638 | .gnu.linkonce.wi.*) } \ | |
639 | .debug_abbrev 0 : { *(.debug_abbrev) } \ | |
640 | .debug_line 0 : { *(.debug_line) } \ | |
641 | .debug_frame 0 : { *(.debug_frame) } \ | |
642 | .debug_str 0 : { *(.debug_str) } \ | |
643 | .debug_loc 0 : { *(.debug_loc) } \ | |
644 | .debug_macinfo 0 : { *(.debug_macinfo) } \ | |
645 | /* SGI/MIPS DWARF 2 extensions */ \ | |
646 | .debug_weaknames 0 : { *(.debug_weaknames) } \ | |
647 | .debug_funcnames 0 : { *(.debug_funcnames) } \ | |
648 | .debug_typenames 0 : { *(.debug_typenames) } \ | |
649 | .debug_varnames 0 : { *(.debug_varnames) } \ | |
650 | ||
651 | /* Stabs debugging sections. */ | |
652 | #define STABS_DEBUG \ | |
653 | .stab 0 : { *(.stab) } \ | |
654 | .stabstr 0 : { *(.stabstr) } \ | |
655 | .stab.excl 0 : { *(.stab.excl) } \ | |
656 | .stab.exclstr 0 : { *(.stab.exclstr) } \ | |
657 | .stab.index 0 : { *(.stab.index) } \ | |
658 | .stab.indexstr 0 : { *(.stab.indexstr) } \ | |
659 | .comment 0 : { *(.comment) } | |
9c9b8b38 | 660 | |
6360b1fb | 661 | #ifdef CONFIG_GENERIC_BUG |
7664c5a1 JF |
662 | #define BUG_TABLE \ |
663 | . = ALIGN(8); \ | |
664 | __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \ | |
c6de0026 | 665 | VMLINUX_SYMBOL(__start___bug_table) = .; \ |
4b89b7f7 | 666 | KEEP(*(__bug_table)) \ |
c6de0026 | 667 | VMLINUX_SYMBOL(__stop___bug_table) = .; \ |
7664c5a1 | 668 | } |
6360b1fb JB |
669 | #else |
670 | #define BUG_TABLE | |
671 | #endif | |
7664c5a1 | 672 | |
63687a52 JB |
673 | #ifdef CONFIG_PM_TRACE |
674 | #define TRACEDATA \ | |
675 | . = ALIGN(4); \ | |
676 | .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \ | |
c6de0026 | 677 | VMLINUX_SYMBOL(__tracedata_start) = .; \ |
4b89b7f7 | 678 | KEEP(*(.tracedata)) \ |
c6de0026 | 679 | VMLINUX_SYMBOL(__tracedata_end) = .; \ |
63687a52 JB |
680 | } |
681 | #else | |
682 | #define TRACEDATA | |
683 | #endif | |
684 | ||
9c9b8b38 | 685 | #define NOTES \ |
cbe87121 RM |
686 | .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \ |
687 | VMLINUX_SYMBOL(__start_notes) = .; \ | |
688 | *(.note.*) \ | |
689 | VMLINUX_SYMBOL(__stop_notes) = .; \ | |
690 | } | |
61ce1efe | 691 | |
ef53dae8 SR |
692 | #define INIT_SETUP(initsetup_align) \ |
693 | . = ALIGN(initsetup_align); \ | |
694 | VMLINUX_SYMBOL(__setup_start) = .; \ | |
4b89b7f7 | 695 | KEEP(*(.init.setup)) \ |
ef53dae8 SR |
696 | VMLINUX_SYMBOL(__setup_end) = .; |
697 | ||
026cee00 PM |
698 | #define INIT_CALLS_LEVEL(level) \ |
699 | VMLINUX_SYMBOL(__initcall##level##_start) = .; \ | |
b67067f1 NP |
700 | KEEP(*(.initcall##level##.init)) \ |
701 | KEEP(*(.initcall##level##s.init)) \ | |
61ce1efe | 702 | |
ef53dae8 SR |
703 | #define INIT_CALLS \ |
704 | VMLINUX_SYMBOL(__initcall_start) = .; \ | |
b67067f1 | 705 | KEEP(*(.initcallearly.init)) \ |
026cee00 PM |
706 | INIT_CALLS_LEVEL(0) \ |
707 | INIT_CALLS_LEVEL(1) \ | |
708 | INIT_CALLS_LEVEL(2) \ | |
709 | INIT_CALLS_LEVEL(3) \ | |
710 | INIT_CALLS_LEVEL(4) \ | |
711 | INIT_CALLS_LEVEL(5) \ | |
712 | INIT_CALLS_LEVEL(rootfs) \ | |
713 | INIT_CALLS_LEVEL(6) \ | |
714 | INIT_CALLS_LEVEL(7) \ | |
ef53dae8 SR |
715 | VMLINUX_SYMBOL(__initcall_end) = .; |
716 | ||
717 | #define CON_INITCALL \ | |
718 | VMLINUX_SYMBOL(__con_initcall_start) = .; \ | |
b67067f1 | 719 | KEEP(*(.con_initcall.init)) \ |
ef53dae8 SR |
720 | VMLINUX_SYMBOL(__con_initcall_end) = .; |
721 | ||
722 | #define SECURITY_INITCALL \ | |
723 | VMLINUX_SYMBOL(__security_initcall_start) = .; \ | |
b67067f1 | 724 | KEEP(*(.security_initcall.init)) \ |
ef53dae8 SR |
725 | VMLINUX_SYMBOL(__security_initcall_end) = .; |
726 | ||
727 | #ifdef CONFIG_BLK_DEV_INITRD | |
728 | #define INIT_RAM_FS \ | |
d8826262 | 729 | . = ALIGN(4); \ |
ef53dae8 | 730 | VMLINUX_SYMBOL(__initramfs_start) = .; \ |
b67067f1 | 731 | KEEP(*(.init.ramfs)) \ |
ffe8018c | 732 | . = ALIGN(8); \ |
b67067f1 | 733 | KEEP(*(.init.ramfs.info)) |
ef53dae8 | 734 | #else |
eadfe219 | 735 | #define INIT_RAM_FS |
ef53dae8 SR |
736 | #endif |
737 | ||
023bf6f1 TH |
738 | /* |
739 | * Default discarded sections. | |
740 | * | |
741 | * Some archs want to discard exit text/data at runtime rather than | |
742 | * link time due to cross-section references such as alt instructions, | |
743 | * bug table, eh_frame, etc. DISCARDS must be the last of output | |
744 | * section definitions so that such archs put those in earlier section | |
745 | * definitions. | |
746 | */ | |
405d967d TH |
747 | #define DISCARDS \ |
748 | /DISCARD/ : { \ | |
749 | EXIT_TEXT \ | |
750 | EXIT_DATA \ | |
023bf6f1 | 751 | EXIT_CALL \ |
405d967d | 752 | *(.discard) \ |
c7f52cdc | 753 | *(.discard.*) \ |
405d967d TH |
754 | } |
755 | ||
6ea0c34d MF |
756 | /** |
757 | * PERCPU_INPUT - the percpu input sections | |
758 | * @cacheline: cacheline size | |
759 | * | |
760 | * The core percpu section names and core symbols which do not rely | |
761 | * directly upon load addresses. | |
762 | * | |
763 | * @cacheline is used to align subsections to avoid false cacheline | |
764 | * sharing between subsections for different purposes. | |
765 | */ | |
766 | #define PERCPU_INPUT(cacheline) \ | |
767 | VMLINUX_SYMBOL(__per_cpu_start) = .; \ | |
768 | *(.data..percpu..first) \ | |
769 | . = ALIGN(PAGE_SIZE); \ | |
770 | *(.data..percpu..page_aligned) \ | |
771 | . = ALIGN(cacheline); \ | |
330d2822 | 772 | *(.data..percpu..read_mostly) \ |
6ea0c34d MF |
773 | . = ALIGN(cacheline); \ |
774 | *(.data..percpu) \ | |
775 | *(.data..percpu..shared_aligned) \ | |
776 | VMLINUX_SYMBOL(__per_cpu_end) = .; | |
777 | ||
3e5d8f97 | 778 | /** |
6b7c38d5 | 779 | * PERCPU_VADDR - define output section for percpu area |
19df0c2f | 780 | * @cacheline: cacheline size |
3e5d8f97 TH |
781 | * @vaddr: explicit base address (optional) |
782 | * @phdr: destination PHDR (optional) | |
783 | * | |
19df0c2f TH |
784 | * Macro which expands to output section for percpu area. |
785 | * | |
786 | * @cacheline is used to align subsections to avoid false cacheline | |
787 | * sharing between subsections for different purposes. | |
788 | * | |
789 | * If @vaddr is not blank, it specifies explicit base address and all | |
790 | * percpu symbols will be offset from the given address. If blank, | |
791 | * @vaddr always equals @laddr + LOAD_OFFSET. | |
3e5d8f97 TH |
792 | * |
793 | * @phdr defines the output PHDR to use if not blank. Be warned that | |
794 | * output PHDR is sticky. If @phdr is specified, the next output | |
795 | * section in the linker script will go there too. @phdr should have | |
796 | * a leading colon. | |
797 | * | |
3ac6cffe TH |
798 | * Note that this macros defines __per_cpu_load as an absolute symbol. |
799 | * If there is no need to put the percpu section at a predetermined | |
0415b00d | 800 | * address, use PERCPU_SECTION. |
3e5d8f97 | 801 | */ |
19df0c2f | 802 | #define PERCPU_VADDR(cacheline, vaddr, phdr) \ |
dba3d36b | 803 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
3d9a854c | 804 | .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \ |
6b7c38d5 | 805 | - LOAD_OFFSET) { \ |
6ea0c34d | 806 | PERCPU_INPUT(cacheline) \ |
6b7c38d5 | 807 | } phdr \ |
3d9a854c | 808 | . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu); |
3e5d8f97 TH |
809 | |
810 | /** | |
0415b00d | 811 | * PERCPU_SECTION - define output section for percpu area, simple version |
19df0c2f | 812 | * @cacheline: cacheline size |
3e5d8f97 | 813 | * |
0415b00d TH |
814 | * Align to PAGE_SIZE and outputs output section for percpu area. This |
815 | * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and | |
3e5d8f97 | 816 | * __per_cpu_start will be identical. |
3ac6cffe | 817 | * |
0415b00d | 818 | * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,) |
19df0c2f TH |
819 | * except that __per_cpu_load is defined as a relative symbol against |
820 | * .data..percpu which is required for relocatable x86_32 configuration. | |
3e5d8f97 | 821 | */ |
0415b00d TH |
822 | #define PERCPU_SECTION(cacheline) \ |
823 | . = ALIGN(PAGE_SIZE); \ | |
3d9a854c | 824 | .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \ |
3ac6cffe | 825 | VMLINUX_SYMBOL(__per_cpu_load) = .; \ |
6ea0c34d | 826 | PERCPU_INPUT(cacheline) \ |
3ac6cffe | 827 | } |
ef53dae8 SR |
828 | |
829 | ||
830 | /* | |
831 | * Definition of the high level *_SECTION macros | |
832 | * They will fit only a subset of the architectures | |
833 | */ | |
834 | ||
835 | ||
836 | /* | |
837 | * Writeable data. | |
838 | * All sections are combined in a single .data section. | |
839 | * The sections following CONSTRUCTORS are arranged so their | |
840 | * typical alignment matches. | |
841 | * A cacheline is typical/always less than a PAGE_SIZE so | |
842 | * the sections that has this restriction (or similar) | |
843 | * is located before the ones requiring PAGE_SIZE alignment. | |
844 | * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which | |
25985edc | 845 | * matches the requirement of PAGE_ALIGNED_DATA. |
ef53dae8 | 846 | * |
7923f90f | 847 | * use 0 as page_align if page_aligned data is not used */ |
73f1d939 | 848 | #define RW_DATA_SECTION(cacheline, pagealigned, inittask) \ |
ef53dae8 SR |
849 | . = ALIGN(PAGE_SIZE); \ |
850 | .data : AT(ADDR(.data) - LOAD_OFFSET) { \ | |
39a449d9 | 851 | INIT_TASK_DATA(inittask) \ |
1b208622 TA |
852 | NOSAVE_DATA \ |
853 | PAGE_ALIGNED_DATA(pagealigned) \ | |
ef53dae8 SR |
854 | CACHELINE_ALIGNED_DATA(cacheline) \ |
855 | READ_MOSTLY_DATA(cacheline) \ | |
856 | DATA_DATA \ | |
857 | CONSTRUCTORS \ | |
ef53dae8 SR |
858 | } |
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) = .; |