blob: d1ea7ce0b4cb95c9e61935aefbcb09c12f49bdbc [file] [log] [blame]
Sam Ravnborgef53dae2009-06-07 20:46:37 +02001/*
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 = .;
Sam Ravnborg7923f902009-06-14 22:10:41 +020015 * HEAD_TEXT_SECTION
Sam Ravnborgef53dae2009-06-07 20:46:37 +020016 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
Tejun Heo0415b00d12011-03-24 18:50:09 +010018 * PERCPU_SECTION(CACHELINE_SIZE)
Sam Ravnborgef53dae2009-06-07 20:46:37 +020019 * __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 *
Tim Abbott04e448d2009-07-12 18:23:33 -040033 * BSS_SECTION(0, 0, 0)
Sam Ravnborgef53dae2009-06-07 20:46:37 +020034 * _end = .;
35 *
Sam Ravnborgef53dae2009-06-07 20:46:37 +020036 * STABS_DEBUG
37 * DWARF_DEBUG
Tejun Heo023bf6f2009-07-09 11:27:40 +090038 *
39 * DISCARDS // must be the last
Sam Ravnborgef53dae2009-06-07 20:46:37 +020040 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * [_stext, _etext] is the text section
44 * [_sdata, _edata] is the data section
45 *
46 * Some of the included output section have their own set of constants.
47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
48 * [__nosave_begin, __nosave_end] for the nosave data
49 */
Tim Abbottc80d4712009-04-25 22:10:56 -040050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#ifndef LOAD_OFFSET
52#define LOAD_OFFSET 0
53#endif
54
Alan Jenkins9e1b9b82009-11-07 21:03:54 +000055#ifndef SYMBOL_PREFIX
56#define VMLINUX_SYMBOL(sym) sym
57#else
58#define PASTE2(x,y) x##y
59#define PASTE(x,y) PASTE2(x,y)
60#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#endif
62
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +000063/* Align . to a 8 byte boundary equals to maximum function alignment. */
64#define ALIGN_FUNCTION() . = ALIGN(8)
65
Sam Ravnborg07fca0e2010-07-10 08:35:00 +020066/*
67 * Align to a 32 byte boundary equal to the
68 * alignment gcc 4.5 uses for a struct
69 */
Dirk Brandewieaab94332010-12-22 11:57:26 -080070#define STRUCT_ALIGNMENT 32
71#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
Sam Ravnborg07fca0e2010-07-10 08:35:00 +020072
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010073/* The actual configuration determine if the init/exit sections
74 * are handled as text/data or they can be discarded (which
75 * often happens at runtime)
76 */
77#ifdef CONFIG_HOTPLUG
78#define DEV_KEEP(sec) *(.dev##sec)
79#define DEV_DISCARD(sec)
80#else
81#define DEV_KEEP(sec)
82#define DEV_DISCARD(sec) *(.dev##sec)
83#endif
84
85#ifdef CONFIG_HOTPLUG_CPU
86#define CPU_KEEP(sec) *(.cpu##sec)
87#define CPU_DISCARD(sec)
88#else
89#define CPU_KEEP(sec)
90#define CPU_DISCARD(sec) *(.cpu##sec)
91#endif
92
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010093#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010094#define MEM_KEEP(sec) *(.mem##sec)
95#define MEM_DISCARD(sec)
96#else
97#define MEM_KEEP(sec)
98#define MEM_DISCARD(sec) *(.mem##sec)
99#endif
100
Steven Rostedt8da38212008-08-14 15:45:07 -0400101#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -0700102#define MCOUNT_REC() . = ALIGN(8); \
103 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -0400104 *(__mcount_loc) \
105 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
106#else
107#define MCOUNT_REC()
108#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100109
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500110#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500111#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
112 *(_ftrace_annotated_branch) \
113 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500114#else
115#define LIKELY_PROFILE()
116#endif
117
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500118#ifdef CONFIG_PROFILE_ALL_BRANCHES
119#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
120 *(_ftrace_branch) \
121 VMLINUX_SYMBOL(__stop_branch_profile) = .;
122#else
123#define BRANCH_PROFILE()
124#endif
125
Tom Zanussi5f77a882009-04-08 03:14:01 -0500126#ifdef CONFIG_EVENT_TRACING
Steven Rostedte4a9ea52011-01-27 09:15:30 -0500127#define FTRACE_EVENTS() . = ALIGN(8); \
128 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500129 *(_ftrace_events) \
130 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
131#else
132#define FTRACE_EVENTS()
133#endif
134
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100135#ifdef CONFIG_TRACING
136#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
137 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
138 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
139#else
140#define TRACE_PRINTKS()
141#endif
142
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100143#ifdef CONFIG_FTRACE_SYSCALLS
Steven Rostedt3d56e332011-02-02 17:06:09 -0500144#define TRACE_SYSCALLS() . = ALIGN(8); \
145 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100146 *(__syscalls_metadata) \
147 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
148#else
149#define TRACE_SYSCALLS()
150#endif
151
Dirk Brandewieaab94332010-12-22 11:57:26 -0800152
153#define KERNEL_DTB() \
154 STRUCT_ALIGN(); \
155 VMLINUX_SYMBOL(__dtb_start) = .; \
156 *(.dtb.init.rodata) \
157 VMLINUX_SYMBOL(__dtb_end) = .;
158
Sam Ravnborgca967252007-05-17 13:38:44 +0200159/* .data section */
160#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200161 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100162 *(.ref.data) \
Mike Frysingerd356c0b2010-10-26 14:22:29 -0700163 *(.data..shared_aligned) /* percpu related */ \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100164 DEV_KEEP(init.data) \
165 DEV_KEEP(exit.data) \
166 CPU_KEEP(init.data) \
167 CPU_KEEP(exit.data) \
168 MEM_KEEP(init.data) \
169 MEM_KEEP(exit.data) \
Jan Beulich7ccaba52012-03-23 15:01:52 -0700170 *(.data.unlikely) \
Mathieu Desnoyers65498642011-01-26 17:26:22 -0500171 STRUCT_ALIGN(); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400172 *(__tracepoints) \
Jason Barone9d376f2009-02-05 11:51:38 -0500173 /* implement dynamic printk debug */ \
Jason Barond430d3d2011-03-16 17:29:47 -0400174 . = ALIGN(8); \
175 VMLINUX_SYMBOL(__start___jump_table) = .; \
176 *(__jump_table) \
177 VMLINUX_SYMBOL(__stop___jump_table) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500178 . = ALIGN(8); \
179 VMLINUX_SYMBOL(__start___verbose) = .; \
180 *(__verbose) \
181 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500182 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500183 BRANCH_PROFILE() \
Steven Rostedt3d56e332011-02-02 17:06:09 -0500184 TRACE_PRINTKS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200185
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200186/*
187 * Data section helpers
188 */
189#define NOSAVE_DATA \
190 . = ALIGN(PAGE_SIZE); \
191 VMLINUX_SYMBOL(__nosave_begin) = .; \
Denys Vlasenko07b3bb12010-02-20 01:03:52 +0100192 *(.data..nosave) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200193 . = ALIGN(PAGE_SIZE); \
194 VMLINUX_SYMBOL(__nosave_end) = .;
195
196#define PAGE_ALIGNED_DATA(page_align) \
197 . = ALIGN(page_align); \
Tim Abbott75b13482010-02-20 01:03:37 +0100198 *(.data..page_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200199
200#define READ_MOSTLY_DATA(align) \
201 . = ALIGN(align); \
Shaohua Li83697442011-01-12 16:59:38 -0800202 *(.data..read_mostly) \
203 . = ALIGN(align);
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200204
205#define CACHELINE_ALIGNED_DATA(align) \
206 . = ALIGN(align); \
Tim Abbott4af57b72010-02-20 01:03:34 +0100207 *(.data..cacheline_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200208
Tim Abbott39a449d2009-06-23 18:53:15 -0400209#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200210 . = ALIGN(align); \
Tim Abbott2af76872010-02-20 01:03:35 +0100211 *(.data..init_task)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200212
213/*
214 * Read only Data
215 */
216#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200217 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100219 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 *(.rodata) *(.rodata.*) \
221 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers65498642011-01-26 17:26:22 -0500222 . = ALIGN(8); \
223 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
224 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
225 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400226 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 } \
228 \
229 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
230 *(.rodata1) \
231 } \
232 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200233 BUG_TABLE \
234 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 /* PCI quirks */ \
236 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
237 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
238 *(.pci_fixup_early) \
239 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
240 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
241 *(.pci_fixup_header) \
242 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
243 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
244 *(.pci_fixup_final) \
245 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
246 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
247 *(.pci_fixup_enable) \
248 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800249 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
250 *(.pci_fixup_resume) \
251 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200252 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
253 *(.pci_fixup_resume_early) \
254 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
255 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
256 *(.pci_fixup_suspend) \
257 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 } \
259 \
David Woodhouse5658c762008-05-23 13:52:42 +0100260 /* Built-in firmware blobs */ \
261 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
262 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
263 *(.builtin_fw) \
264 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
265 } \
266 \
Matt Porter394b7012005-11-07 01:00:15 -0800267 /* RapidIO route ops */ \
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700268 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
Alexandre Bounine058f88d62010-05-26 14:44:03 -0700269 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
270 *(.rio_switch_ops) \
271 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
Matt Porter394b7012005-11-07 01:00:15 -0800272 } \
273 \
Jan Beulich63687a52008-05-12 15:44:41 +0200274 TRACEDATA \
275 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 /* Kernel symbol table: Normal symbols */ \
277 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
278 VMLINUX_SYMBOL(__start___ksymtab) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200279 *(SORT(___ksymtab+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
281 } \
282 \
283 /* Kernel symbol table: GPL-only symbols */ \
284 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
285 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200286 *(SORT(___ksymtab_gpl+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
288 } \
289 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700290 /* Kernel symbol table: Normal unused symbols */ \
291 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
292 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200293 *(SORT(___ksymtab_unused+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700294 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
295 } \
296 \
297 /* Kernel symbol table: GPL-only unused symbols */ \
298 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
299 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200300 *(SORT(___ksymtab_unused_gpl+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700301 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
302 } \
303 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800304 /* Kernel symbol table: GPL-future-only symbols */ \
305 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
306 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200307 *(SORT(___ksymtab_gpl_future+*)) \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800308 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
309 } \
310 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 /* Kernel symbol table: Normal symbols */ \
312 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
313 VMLINUX_SYMBOL(__start___kcrctab) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200314 *(SORT(___kcrctab+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
316 } \
317 \
318 /* Kernel symbol table: GPL-only symbols */ \
319 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
320 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200321 *(SORT(___kcrctab_gpl+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
323 } \
324 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700325 /* Kernel symbol table: Normal unused symbols */ \
326 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
327 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200328 *(SORT(___kcrctab_unused+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700329 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
330 } \
331 \
332 /* Kernel symbol table: GPL-only unused symbols */ \
333 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
334 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200335 *(SORT(___kcrctab_unused_gpl+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700336 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
337 } \
338 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800339 /* Kernel symbol table: GPL-future-only symbols */ \
340 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
341 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200342 *(SORT(___kcrctab_gpl_future+*)) \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800343 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
344 } \
345 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 /* Kernel symbol table: strings */ \
347 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
348 *(__ksymtab_strings) \
349 } \
350 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100351 /* __*init sections */ \
352 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100353 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100354 DEV_KEEP(init.rodata) \
355 DEV_KEEP(exit.rodata) \
356 CPU_KEEP(init.rodata) \
357 CPU_KEEP(exit.rodata) \
358 MEM_KEEP(init.rodata) \
359 MEM_KEEP(exit.rodata) \
360 } \
361 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 /* Built-in module parameters. */ \
363 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
364 VMLINUX_SYMBOL(__start___param) = .; \
365 *(__param) \
366 VMLINUX_SYMBOL(__stop___param) = .; \
Dmitry Torokhove94965e2010-12-15 14:00:19 -0800367 } \
368 \
369 /* Built-in module versions. */ \
370 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
371 VMLINUX_SYMBOL(__start___modver) = .; \
372 *(__modver) \
373 VMLINUX_SYMBOL(__stop___modver) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100374 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100375 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700376 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200377 . = ALIGN((align));
378
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200379/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200380 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200381#define RODATA RO_DATA_SECTION(4096)
382#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700385 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 VMLINUX_SYMBOL(__security_initcall_start) = .; \
387 *(.security_initcall.init) \
388 VMLINUX_SYMBOL(__security_initcall_end) = .; \
389 }
390
Sam Ravnborg76647092007-05-13 00:31:33 +0200391/* .text section. Map to function alignment to avoid address changes
392 * during second ld run in second ld pass when generating System.map */
393#define TEXT_TEXT \
394 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100395 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200396 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100397 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100398 DEV_KEEP(init.text) \
399 DEV_KEEP(exit.text) \
400 CPU_KEEP(init.text) \
401 CPU_KEEP(exit.text) \
402 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100403 MEM_KEEP(exit.text) \
404 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100405
Sam Ravnborg76647092007-05-13 00:31:33 +0200406
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000407/* sched.text is aling to function alignment to secure we have same
408 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000410 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 VMLINUX_SYMBOL(__sched_text_start) = .; \
412 *(.sched.text) \
413 VMLINUX_SYMBOL(__sched_text_end) = .;
414
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000415/* spinlock.text is aling to function alignment to secure we have same
416 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000418 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 VMLINUX_SYMBOL(__lock_text_start) = .; \
420 *(.spinlock.text) \
421 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700422
423#define KPROBES_TEXT \
424 ALIGN_FUNCTION(); \
425 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
426 *(.kprobes.text) \
427 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200428
Jiri Olsaea714542011-03-07 19:10:39 +0100429#define ENTRY_TEXT \
430 ALIGN_FUNCTION(); \
431 VMLINUX_SYMBOL(__entry_text_start) = .; \
432 *(.entry.text) \
433 VMLINUX_SYMBOL(__entry_text_end) = .;
434
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100435#ifdef CONFIG_FUNCTION_GRAPH_TRACER
436#define IRQENTRY_TEXT \
437 ALIGN_FUNCTION(); \
438 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
439 *(.irqentry.text) \
440 VMLINUX_SYMBOL(__irqentry_text_end) = .;
441#else
442#define IRQENTRY_TEXT
443#endif
444
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100445/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200446#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100447
Sam Ravnborg7923f902009-06-14 22:10:41 +0200448#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200449 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
450 HEAD_TEXT \
451 }
452
453/*
454 * Exception table
455 */
456#define EXCEPTION_TABLE(align) \
457 . = ALIGN(align); \
458 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
459 VMLINUX_SYMBOL(__start___ex_table) = .; \
460 *(__ex_table) \
461 VMLINUX_SYMBOL(__stop___ex_table) = .; \
462 }
463
464/*
465 * Init task
466 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400467#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200468 . = ALIGN(align); \
Sam Ravnborgda5e37e2010-07-13 11:39:42 +0200469 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400470 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200471 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100472
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700473#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700474#define KERNEL_CTORS() . = ALIGN(8); \
475 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700476 *(.ctors) \
477 VMLINUX_SYMBOL(__ctors_end) = .;
478#else
479#define KERNEL_CTORS()
480#endif
481
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100482/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100483#define INIT_DATA \
484 *(.init.data) \
485 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100486 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100487 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700488 KERNEL_CTORS() \
John Reiser4b3b4c52009-07-27 11:23:50 -0700489 MCOUNT_REC() \
Steven Rostedt9fd49322012-04-24 22:32:06 -0400490 *(.init.rodata) \
Steven Rostedte4a9ea52011-01-27 09:15:30 -0500491 FTRACE_EVENTS() \
Steven Rostedt3d56e332011-02-02 17:06:09 -0500492 TRACE_SYSCALLS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000493 DEV_DISCARD(init.rodata) \
494 CPU_DISCARD(init.rodata) \
Dirk Brandewieaab94332010-12-22 11:57:26 -0800495 MEM_DISCARD(init.rodata) \
496 KERNEL_DTB()
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100497
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100498#define INIT_TEXT \
499 *(.init.text) \
500 DEV_DISCARD(init.text) \
501 CPU_DISCARD(init.text) \
502 MEM_DISCARD(init.text)
503
504#define EXIT_DATA \
505 *(.exit.data) \
506 DEV_DISCARD(exit.data) \
507 DEV_DISCARD(exit.rodata) \
508 CPU_DISCARD(exit.data) \
509 CPU_DISCARD(exit.rodata) \
510 MEM_DISCARD(exit.data) \
511 MEM_DISCARD(exit.rodata)
512
513#define EXIT_TEXT \
514 *(.exit.text) \
515 DEV_DISCARD(exit.text) \
516 CPU_DISCARD(exit.text) \
517 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100518
Sam Ravnborg7923f902009-06-14 22:10:41 +0200519#define EXIT_CALL \
520 *(.exitcall.exit)
521
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200522/*
523 * bss (Block Started by Symbol) - uninitialized data
524 * zeroed during startup
525 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400526#define SBSS(sbss_align) \
527 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200528 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
529 *(.sbss) \
530 *(.scommon) \
531 }
532
David Daneyc87728c2012-08-14 11:08:00 -0700533/*
534 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
535 * sections to the front of bss.
536 */
537#ifndef BSS_FIRST_SECTIONS
538#define BSS_FIRST_SECTIONS
539#endif
540
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200541#define BSS(bss_align) \
542 . = ALIGN(bss_align); \
543 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
David Daneyc87728c2012-08-14 11:08:00 -0700544 BSS_FIRST_SECTIONS \
Tim Abbott7c74df02010-02-20 01:03:38 +0100545 *(.bss..page_aligned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200546 *(.dynbss) \
547 *(.bss) \
548 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200549 }
550
551/*
552 * DWARF debug sections.
553 * Symbols in the DWARF debugging sections are relative to
554 * the beginning of the section so we begin them at 0.
555 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200556#define DWARF_DEBUG \
557 /* DWARF 1 */ \
558 .debug 0 : { *(.debug) } \
559 .line 0 : { *(.line) } \
560 /* GNU DWARF 1 extensions */ \
561 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
562 .debug_sfnames 0 : { *(.debug_sfnames) } \
563 /* DWARF 1.1 and DWARF 2 */ \
564 .debug_aranges 0 : { *(.debug_aranges) } \
565 .debug_pubnames 0 : { *(.debug_pubnames) } \
566 /* DWARF 2 */ \
567 .debug_info 0 : { *(.debug_info \
568 .gnu.linkonce.wi.*) } \
569 .debug_abbrev 0 : { *(.debug_abbrev) } \
570 .debug_line 0 : { *(.debug_line) } \
571 .debug_frame 0 : { *(.debug_frame) } \
572 .debug_str 0 : { *(.debug_str) } \
573 .debug_loc 0 : { *(.debug_loc) } \
574 .debug_macinfo 0 : { *(.debug_macinfo) } \
575 /* SGI/MIPS DWARF 2 extensions */ \
576 .debug_weaknames 0 : { *(.debug_weaknames) } \
577 .debug_funcnames 0 : { *(.debug_funcnames) } \
578 .debug_typenames 0 : { *(.debug_typenames) } \
579 .debug_varnames 0 : { *(.debug_varnames) } \
580
581 /* Stabs debugging sections. */
582#define STABS_DEBUG \
583 .stab 0 : { *(.stab) } \
584 .stabstr 0 : { *(.stabstr) } \
585 .stab.excl 0 : { *(.stab.excl) } \
586 .stab.exclstr 0 : { *(.stab.exclstr) } \
587 .stab.index 0 : { *(.stab.index) } \
588 .stab.indexstr 0 : { *(.stab.indexstr) } \
589 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700590
Jan Beulich6360b1f2008-05-12 15:44:41 +0200591#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800592#define BUG_TABLE \
593 . = ALIGN(8); \
594 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700595 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800596 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700597 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800598 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200599#else
600#define BUG_TABLE
601#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800602
Jan Beulich63687a52008-05-12 15:44:41 +0200603#ifdef CONFIG_PM_TRACE
604#define TRACEDATA \
605 . = ALIGN(4); \
606 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700607 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200608 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700609 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200610 }
611#else
612#define TRACEDATA
613#endif
614
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700615#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700616 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
617 VMLINUX_SYMBOL(__start_notes) = .; \
618 *(.note.*) \
619 VMLINUX_SYMBOL(__stop_notes) = .; \
620 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700621
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200622#define INIT_SETUP(initsetup_align) \
623 . = ALIGN(initsetup_align); \
624 VMLINUX_SYMBOL(__setup_start) = .; \
625 *(.init.setup) \
626 VMLINUX_SYMBOL(__setup_end) = .;
627
Pawel Moll026cee02012-03-26 12:50:51 +1030628#define INIT_CALLS_LEVEL(level) \
629 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
630 *(.initcall##level##.init) \
631 *(.initcall##level##s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700632
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200633#define INIT_CALLS \
634 VMLINUX_SYMBOL(__initcall_start) = .; \
Pawel Moll026cee02012-03-26 12:50:51 +1030635 *(.initcallearly.init) \
636 INIT_CALLS_LEVEL(0) \
637 INIT_CALLS_LEVEL(1) \
638 INIT_CALLS_LEVEL(2) \
639 INIT_CALLS_LEVEL(3) \
640 INIT_CALLS_LEVEL(4) \
641 INIT_CALLS_LEVEL(5) \
642 INIT_CALLS_LEVEL(rootfs) \
643 INIT_CALLS_LEVEL(6) \
644 INIT_CALLS_LEVEL(7) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200645 VMLINUX_SYMBOL(__initcall_end) = .;
646
647#define CON_INITCALL \
648 VMLINUX_SYMBOL(__con_initcall_start) = .; \
649 *(.con_initcall.init) \
650 VMLINUX_SYMBOL(__con_initcall_end) = .;
651
652#define SECURITY_INITCALL \
653 VMLINUX_SYMBOL(__security_initcall_start) = .; \
654 *(.security_initcall.init) \
655 VMLINUX_SYMBOL(__security_initcall_end) = .;
656
657#ifdef CONFIG_BLK_DEV_INITRD
658#define INIT_RAM_FS \
Mike Frysingerd8826262010-10-26 14:22:30 -0700659 . = ALIGN(4); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200660 VMLINUX_SYMBOL(__initramfs_start) = .; \
661 *(.init.ramfs) \
Hendrik Bruecknerffe80182010-09-17 15:24:11 -0700662 . = ALIGN(8); \
663 *(.init.ramfs.info)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200664#else
David Howellseadfe212009-06-22 15:32:31 +0100665#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200666#endif
667
Tejun Heo023bf6f2009-07-09 11:27:40 +0900668/*
669 * Default discarded sections.
670 *
671 * Some archs want to discard exit text/data at runtime rather than
672 * link time due to cross-section references such as alt instructions,
673 * bug table, eh_frame, etc. DISCARDS must be the last of output
674 * section definitions so that such archs put those in earlier section
675 * definitions.
676 */
Tejun Heo405d9672009-06-24 15:13:38 +0900677#define DISCARDS \
678 /DISCARD/ : { \
679 EXIT_TEXT \
680 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900681 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900682 *(.discard) \
Jeremy Fitzhardingec7f52cd2010-07-22 22:58:01 -0700683 *(.discard.*) \
Tejun Heo405d9672009-06-24 15:13:38 +0900684 }
685
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900686/**
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200687 * PERCPU_INPUT - the percpu input sections
688 * @cacheline: cacheline size
689 *
690 * The core percpu section names and core symbols which do not rely
691 * directly upon load addresses.
692 *
693 * @cacheline is used to align subsections to avoid false cacheline
694 * sharing between subsections for different purposes.
695 */
696#define PERCPU_INPUT(cacheline) \
697 VMLINUX_SYMBOL(__per_cpu_start) = .; \
698 *(.data..percpu..first) \
699 . = ALIGN(PAGE_SIZE); \
700 *(.data..percpu..page_aligned) \
701 . = ALIGN(cacheline); \
702 *(.data..percpu..readmostly) \
703 . = ALIGN(cacheline); \
704 *(.data..percpu) \
705 *(.data..percpu..shared_aligned) \
706 VMLINUX_SYMBOL(__per_cpu_end) = .;
707
708/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900709 * PERCPU_VADDR - define output section for percpu area
Tejun Heo19df0c22011-01-25 14:26:50 +0100710 * @cacheline: cacheline size
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900711 * @vaddr: explicit base address (optional)
712 * @phdr: destination PHDR (optional)
713 *
Tejun Heo19df0c22011-01-25 14:26:50 +0100714 * Macro which expands to output section for percpu area.
715 *
716 * @cacheline is used to align subsections to avoid false cacheline
717 * sharing between subsections for different purposes.
718 *
719 * If @vaddr is not blank, it specifies explicit base address and all
720 * percpu symbols will be offset from the given address. If blank,
721 * @vaddr always equals @laddr + LOAD_OFFSET.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900722 *
723 * @phdr defines the output PHDR to use if not blank. Be warned that
724 * output PHDR is sticky. If @phdr is specified, the next output
725 * section in the linker script will go there too. @phdr should have
726 * a leading colon.
727 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900728 * Note that this macros defines __per_cpu_load as an absolute symbol.
729 * If there is no need to put the percpu section at a predetermined
Tejun Heo0415b00d12011-03-24 18:50:09 +0100730 * address, use PERCPU_SECTION.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900731 */
Tejun Heo19df0c22011-01-25 14:26:50 +0100732#define PERCPU_VADDR(cacheline, vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100733 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100734 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900735 - LOAD_OFFSET) { \
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200736 PERCPU_INPUT(cacheline) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900737 } phdr \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100738 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900739
740/**
Tejun Heo0415b00d12011-03-24 18:50:09 +0100741 * PERCPU_SECTION - define output section for percpu area, simple version
Tejun Heo19df0c22011-01-25 14:26:50 +0100742 * @cacheline: cacheline size
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900743 *
Tejun Heo0415b00d12011-03-24 18:50:09 +0100744 * Align to PAGE_SIZE and outputs output section for percpu area. This
745 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900746 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900747 *
Tejun Heo0415b00d12011-03-24 18:50:09 +0100748 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
Tejun Heo19df0c22011-01-25 14:26:50 +0100749 * except that __per_cpu_load is defined as a relative symbol against
750 * .data..percpu which is required for relocatable x86_32 configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900751 */
Tejun Heo0415b00d12011-03-24 18:50:09 +0100752#define PERCPU_SECTION(cacheline) \
753 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100754 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900755 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200756 PERCPU_INPUT(cacheline) \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900757 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200758
759
760/*
761 * Definition of the high level *_SECTION macros
762 * They will fit only a subset of the architectures
763 */
764
765
766/*
767 * Writeable data.
768 * All sections are combined in a single .data section.
769 * The sections following CONSTRUCTORS are arranged so their
770 * typical alignment matches.
771 * A cacheline is typical/always less than a PAGE_SIZE so
772 * the sections that has this restriction (or similar)
773 * is located before the ones requiring PAGE_SIZE alignment.
774 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300775 * matches the requirement of PAGE_ALIGNED_DATA.
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200776 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200777 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900778#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200779 . = ALIGN(PAGE_SIZE); \
780 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400781 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400782 NOSAVE_DATA \
783 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200784 CACHELINE_ALIGNED_DATA(cacheline) \
785 READ_MOSTLY_DATA(cacheline) \
786 DATA_DATA \
787 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200788 }
789
790#define INIT_TEXT_SECTION(inittext_align) \
791 . = ALIGN(inittext_align); \
792 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
793 VMLINUX_SYMBOL(_sinittext) = .; \
794 INIT_TEXT \
795 VMLINUX_SYMBOL(_einittext) = .; \
796 }
797
798#define INIT_DATA_SECTION(initsetup_align) \
799 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
800 INIT_DATA \
801 INIT_SETUP(initsetup_align) \
802 INIT_CALLS \
803 CON_INITCALL \
804 SECURITY_INITCALL \
805 INIT_RAM_FS \
806 }
807
Tim Abbott04e448d2009-07-12 18:23:33 -0400808#define BSS_SECTION(sbss_align, bss_align, stop_align) \
809 . = ALIGN(sbss_align); \
810 VMLINUX_SYMBOL(__bss_start) = .; \
811 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200812 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400813 . = ALIGN(stop_align); \
814 VMLINUX_SYMBOL(__bss_stop) = .;