blob: aaf1105d9d91bf148c6b62f16f8144ffa877703f [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(...)
18 * PERCPU(PAGE_SIZE)
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 *
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 */
70#define STRUCT_ALIGN() . = ALIGN(32)
71
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010072/* The actual configuration determine if the init/exit sections
73 * are handled as text/data or they can be discarded (which
74 * often happens at runtime)
75 */
76#ifdef CONFIG_HOTPLUG
77#define DEV_KEEP(sec) *(.dev##sec)
78#define DEV_DISCARD(sec)
79#else
80#define DEV_KEEP(sec)
81#define DEV_DISCARD(sec) *(.dev##sec)
82#endif
83
84#ifdef CONFIG_HOTPLUG_CPU
85#define CPU_KEEP(sec) *(.cpu##sec)
86#define CPU_DISCARD(sec)
87#else
88#define CPU_KEEP(sec)
89#define CPU_DISCARD(sec) *(.cpu##sec)
90#endif
91
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010092#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010093#define MEM_KEEP(sec) *(.mem##sec)
94#define MEM_DISCARD(sec)
95#else
96#define MEM_KEEP(sec)
97#define MEM_DISCARD(sec) *(.mem##sec)
98#endif
99
Steven Rostedt8da38212008-08-14 15:45:07 -0400100#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -0700101#define MCOUNT_REC() . = ALIGN(8); \
102 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -0400103 *(__mcount_loc) \
104 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
105#else
106#define MCOUNT_REC()
107#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100108
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500109#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500110#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
111 *(_ftrace_annotated_branch) \
112 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500113#else
114#define LIKELY_PROFILE()
115#endif
116
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500117#ifdef CONFIG_PROFILE_ALL_BRANCHES
118#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
119 *(_ftrace_branch) \
120 VMLINUX_SYMBOL(__stop_branch_profile) = .;
121#else
122#define BRANCH_PROFILE()
123#endif
124
Tom Zanussi5f77a882009-04-08 03:14:01 -0500125#ifdef CONFIG_EVENT_TRACING
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500126#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
127 *(_ftrace_events) \
128 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
129#else
130#define FTRACE_EVENTS()
131#endif
132
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100133#ifdef CONFIG_TRACING
134#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
135 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
136 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
137#else
138#define TRACE_PRINTKS()
139#endif
140
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100141#ifdef CONFIG_FTRACE_SYSCALLS
142#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
143 *(__syscalls_metadata) \
144 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
145#else
146#define TRACE_SYSCALLS()
147#endif
148
Sam Ravnborgca967252007-05-17 13:38:44 +0200149/* .data section */
150#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200151 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100152 *(.ref.data) \
Mike Frysingerd356c0b2010-10-26 14:22:29 -0700153 *(.data..shared_aligned) /* percpu related */ \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100154 DEV_KEEP(init.data) \
155 DEV_KEEP(exit.data) \
156 CPU_KEEP(init.data) \
157 CPU_KEEP(exit.data) \
158 MEM_KEEP(init.data) \
159 MEM_KEEP(exit.data) \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500160 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400161 VMLINUX_SYMBOL(__start___tracepoints) = .; \
162 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500163 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500164 /* implement dynamic printk debug */ \
165 . = ALIGN(8); \
166 VMLINUX_SYMBOL(__start___verbose) = .; \
167 *(__verbose) \
168 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500169 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500170 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100171 TRACE_PRINTKS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200172 \
173 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100174 FTRACE_EVENTS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200175 \
176 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100177 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200178
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200179/*
180 * Data section helpers
181 */
182#define NOSAVE_DATA \
183 . = ALIGN(PAGE_SIZE); \
184 VMLINUX_SYMBOL(__nosave_begin) = .; \
Denys Vlasenko07b3bb12010-02-20 01:03:52 +0100185 *(.data..nosave) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200186 . = ALIGN(PAGE_SIZE); \
187 VMLINUX_SYMBOL(__nosave_end) = .;
188
189#define PAGE_ALIGNED_DATA(page_align) \
190 . = ALIGN(page_align); \
Tim Abbott75b13482010-02-20 01:03:37 +0100191 *(.data..page_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200192
193#define READ_MOSTLY_DATA(align) \
194 . = ALIGN(align); \
Denys Vlasenko54cb27a2010-02-20 01:03:44 +0100195 *(.data..read_mostly)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200196
197#define CACHELINE_ALIGNED_DATA(align) \
198 . = ALIGN(align); \
Tim Abbott4af57b72010-02-20 01:03:34 +0100199 *(.data..cacheline_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200200
Tim Abbott39a449d2009-06-23 18:53:15 -0400201#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200202 . = ALIGN(align); \
Tim Abbott2af76872010-02-20 01:03:35 +0100203 *(.data..init_task)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200204
205/*
206 * Read only Data
207 */
208#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200209 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100211 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 *(.rodata) *(.rodata.*) \
213 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700214 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400215 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 } \
217 \
218 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
219 *(.rodata1) \
220 } \
221 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200222 BUG_TABLE \
223 \
Jason Baronbf5438fc2010-09-17 11:09:00 -0400224 JUMP_TABLE \
225 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 /* PCI quirks */ \
227 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
228 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
229 *(.pci_fixup_early) \
230 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
231 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
232 *(.pci_fixup_header) \
233 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
234 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
235 *(.pci_fixup_final) \
236 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
237 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
238 *(.pci_fixup_enable) \
239 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800240 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
241 *(.pci_fixup_resume) \
242 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200243 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
244 *(.pci_fixup_resume_early) \
245 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
246 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
247 *(.pci_fixup_suspend) \
248 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 } \
250 \
David Woodhouse5658c762008-05-23 13:52:42 +0100251 /* Built-in firmware blobs */ \
252 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
253 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
254 *(.builtin_fw) \
255 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
256 } \
257 \
Matt Porter394b7012005-11-07 01:00:15 -0800258 /* RapidIO route ops */ \
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700259 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
Alexandre Bounine058f88d62010-05-26 14:44:03 -0700260 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
261 *(.rio_switch_ops) \
262 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
Matt Porter394b7012005-11-07 01:00:15 -0800263 } \
264 \
Jan Beulich63687a52008-05-12 15:44:41 +0200265 TRACEDATA \
266 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 /* Kernel symbol table: Normal symbols */ \
268 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
269 VMLINUX_SYMBOL(__start___ksymtab) = .; \
270 *(__ksymtab) \
271 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
272 } \
273 \
274 /* Kernel symbol table: GPL-only symbols */ \
275 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
276 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
277 *(__ksymtab_gpl) \
278 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
279 } \
280 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700281 /* Kernel symbol table: Normal unused symbols */ \
282 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
283 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
284 *(__ksymtab_unused) \
285 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
286 } \
287 \
288 /* Kernel symbol table: GPL-only unused symbols */ \
289 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
290 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
291 *(__ksymtab_unused_gpl) \
292 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
293 } \
294 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800295 /* Kernel symbol table: GPL-future-only symbols */ \
296 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
297 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
298 *(__ksymtab_gpl_future) \
299 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
300 } \
301 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 /* Kernel symbol table: Normal symbols */ \
303 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
304 VMLINUX_SYMBOL(__start___kcrctab) = .; \
305 *(__kcrctab) \
306 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
307 } \
308 \
309 /* Kernel symbol table: GPL-only symbols */ \
310 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
311 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
312 *(__kcrctab_gpl) \
313 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
314 } \
315 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700316 /* Kernel symbol table: Normal unused symbols */ \
317 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
318 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
319 *(__kcrctab_unused) \
320 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
321 } \
322 \
323 /* Kernel symbol table: GPL-only unused symbols */ \
324 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
325 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
326 *(__kcrctab_unused_gpl) \
327 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
328 } \
329 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800330 /* Kernel symbol table: GPL-future-only symbols */ \
331 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
332 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
333 *(__kcrctab_gpl_future) \
334 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
335 } \
336 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 /* Kernel symbol table: strings */ \
338 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
339 *(__ksymtab_strings) \
340 } \
341 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100342 /* __*init sections */ \
343 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100344 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100345 DEV_KEEP(init.rodata) \
346 DEV_KEEP(exit.rodata) \
347 CPU_KEEP(init.rodata) \
348 CPU_KEEP(exit.rodata) \
349 MEM_KEEP(init.rodata) \
350 MEM_KEEP(exit.rodata) \
351 } \
352 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 /* Built-in module parameters. */ \
354 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
355 VMLINUX_SYMBOL(__start___param) = .; \
356 *(__param) \
357 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100358 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100359 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700360 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200361 . = ALIGN((align));
362
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200363/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200364 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200365#define RODATA RO_DATA_SECTION(4096)
366#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700369 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 VMLINUX_SYMBOL(__security_initcall_start) = .; \
371 *(.security_initcall.init) \
372 VMLINUX_SYMBOL(__security_initcall_end) = .; \
373 }
374
Sam Ravnborg76647092007-05-13 00:31:33 +0200375/* .text section. Map to function alignment to avoid address changes
376 * during second ld run in second ld pass when generating System.map */
377#define TEXT_TEXT \
378 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100379 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200380 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100381 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100382 DEV_KEEP(init.text) \
383 DEV_KEEP(exit.text) \
384 CPU_KEEP(init.text) \
385 CPU_KEEP(exit.text) \
386 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100387 MEM_KEEP(exit.text) \
388 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100389
Sam Ravnborg76647092007-05-13 00:31:33 +0200390
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000391/* sched.text is aling to function alignment to secure we have same
392 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000394 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 VMLINUX_SYMBOL(__sched_text_start) = .; \
396 *(.sched.text) \
397 VMLINUX_SYMBOL(__sched_text_end) = .;
398
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000399/* spinlock.text is aling to function alignment to secure we have same
400 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000402 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 VMLINUX_SYMBOL(__lock_text_start) = .; \
404 *(.spinlock.text) \
405 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700406
407#define KPROBES_TEXT \
408 ALIGN_FUNCTION(); \
409 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
410 *(.kprobes.text) \
411 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200412
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100413#ifdef CONFIG_FUNCTION_GRAPH_TRACER
414#define IRQENTRY_TEXT \
415 ALIGN_FUNCTION(); \
416 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
417 *(.irqentry.text) \
418 VMLINUX_SYMBOL(__irqentry_text_end) = .;
419#else
420#define IRQENTRY_TEXT
421#endif
422
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100423/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200424#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100425
Sam Ravnborg7923f902009-06-14 22:10:41 +0200426#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200427 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
428 HEAD_TEXT \
429 }
430
431/*
432 * Exception table
433 */
434#define EXCEPTION_TABLE(align) \
435 . = ALIGN(align); \
436 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
437 VMLINUX_SYMBOL(__start___ex_table) = .; \
438 *(__ex_table) \
439 VMLINUX_SYMBOL(__stop___ex_table) = .; \
440 }
441
442/*
443 * Init task
444 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400445#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200446 . = ALIGN(align); \
Sam Ravnborgda5e37e2010-07-13 11:39:42 +0200447 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400448 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200449 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100450
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700451#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700452#define KERNEL_CTORS() . = ALIGN(8); \
453 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700454 *(.ctors) \
455 VMLINUX_SYMBOL(__ctors_end) = .;
456#else
457#define KERNEL_CTORS()
458#endif
459
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100460/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100461#define INIT_DATA \
462 *(.init.data) \
463 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100464 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100465 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700466 KERNEL_CTORS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000467 *(.init.rodata) \
John Reiser4b3b4c52009-07-27 11:23:50 -0700468 MCOUNT_REC() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000469 DEV_DISCARD(init.rodata) \
470 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500471 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100472
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100473#define INIT_TEXT \
474 *(.init.text) \
475 DEV_DISCARD(init.text) \
476 CPU_DISCARD(init.text) \
477 MEM_DISCARD(init.text)
478
479#define EXIT_DATA \
480 *(.exit.data) \
481 DEV_DISCARD(exit.data) \
482 DEV_DISCARD(exit.rodata) \
483 CPU_DISCARD(exit.data) \
484 CPU_DISCARD(exit.rodata) \
485 MEM_DISCARD(exit.data) \
486 MEM_DISCARD(exit.rodata)
487
488#define EXIT_TEXT \
489 *(.exit.text) \
490 DEV_DISCARD(exit.text) \
491 CPU_DISCARD(exit.text) \
492 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100493
Sam Ravnborg7923f902009-06-14 22:10:41 +0200494#define EXIT_CALL \
495 *(.exitcall.exit)
496
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200497/*
498 * bss (Block Started by Symbol) - uninitialized data
499 * zeroed during startup
500 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400501#define SBSS(sbss_align) \
502 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200503 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
504 *(.sbss) \
505 *(.scommon) \
506 }
507
508#define BSS(bss_align) \
509 . = ALIGN(bss_align); \
510 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
Tim Abbott7c74df02010-02-20 01:03:38 +0100511 *(.bss..page_aligned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200512 *(.dynbss) \
513 *(.bss) \
514 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200515 }
516
517/*
518 * DWARF debug sections.
519 * Symbols in the DWARF debugging sections are relative to
520 * the beginning of the section so we begin them at 0.
521 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200522#define DWARF_DEBUG \
523 /* DWARF 1 */ \
524 .debug 0 : { *(.debug) } \
525 .line 0 : { *(.line) } \
526 /* GNU DWARF 1 extensions */ \
527 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
528 .debug_sfnames 0 : { *(.debug_sfnames) } \
529 /* DWARF 1.1 and DWARF 2 */ \
530 .debug_aranges 0 : { *(.debug_aranges) } \
531 .debug_pubnames 0 : { *(.debug_pubnames) } \
532 /* DWARF 2 */ \
533 .debug_info 0 : { *(.debug_info \
534 .gnu.linkonce.wi.*) } \
535 .debug_abbrev 0 : { *(.debug_abbrev) } \
536 .debug_line 0 : { *(.debug_line) } \
537 .debug_frame 0 : { *(.debug_frame) } \
538 .debug_str 0 : { *(.debug_str) } \
539 .debug_loc 0 : { *(.debug_loc) } \
540 .debug_macinfo 0 : { *(.debug_macinfo) } \
541 /* SGI/MIPS DWARF 2 extensions */ \
542 .debug_weaknames 0 : { *(.debug_weaknames) } \
543 .debug_funcnames 0 : { *(.debug_funcnames) } \
544 .debug_typenames 0 : { *(.debug_typenames) } \
545 .debug_varnames 0 : { *(.debug_varnames) } \
546
547 /* Stabs debugging sections. */
548#define STABS_DEBUG \
549 .stab 0 : { *(.stab) } \
550 .stabstr 0 : { *(.stabstr) } \
551 .stab.excl 0 : { *(.stab.excl) } \
552 .stab.exclstr 0 : { *(.stab.exclstr) } \
553 .stab.index 0 : { *(.stab.index) } \
554 .stab.indexstr 0 : { *(.stab.indexstr) } \
555 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700556
Jan Beulich6360b1f2008-05-12 15:44:41 +0200557#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800558#define BUG_TABLE \
559 . = ALIGN(8); \
560 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700561 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800562 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700563 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800564 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200565#else
566#define BUG_TABLE
567#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800568
Jason Baronbf5438fc2010-09-17 11:09:00 -0400569#define JUMP_TABLE \
570 . = ALIGN(8); \
571 __jump_table : AT(ADDR(__jump_table) - LOAD_OFFSET) { \
572 VMLINUX_SYMBOL(__start___jump_table) = .; \
573 *(__jump_table) \
574 VMLINUX_SYMBOL(__stop___jump_table) = .; \
575 }
576
Jan Beulich63687a52008-05-12 15:44:41 +0200577#ifdef CONFIG_PM_TRACE
578#define TRACEDATA \
579 . = ALIGN(4); \
580 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700581 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200582 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700583 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200584 }
585#else
586#define TRACEDATA
587#endif
588
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700589#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700590 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
591 VMLINUX_SYMBOL(__start_notes) = .; \
592 *(.note.*) \
593 VMLINUX_SYMBOL(__stop_notes) = .; \
594 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700595
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200596#define INIT_SETUP(initsetup_align) \
597 . = ALIGN(initsetup_align); \
598 VMLINUX_SYMBOL(__setup_start) = .; \
599 *(.init.setup) \
600 VMLINUX_SYMBOL(__setup_end) = .;
601
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700602#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700603 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700604 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800605 *(.initcall0.init) \
606 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700607 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700608 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700609 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700610 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700611 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700612 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700613 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700614 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700615 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700616 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800617 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700618 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700619 *(.initcall6s.init) \
620 *(.initcall7.init) \
621 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700622
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200623#define INIT_CALLS \
624 VMLINUX_SYMBOL(__initcall_start) = .; \
625 INITCALLS \
626 VMLINUX_SYMBOL(__initcall_end) = .;
627
628#define CON_INITCALL \
629 VMLINUX_SYMBOL(__con_initcall_start) = .; \
630 *(.con_initcall.init) \
631 VMLINUX_SYMBOL(__con_initcall_end) = .;
632
633#define SECURITY_INITCALL \
634 VMLINUX_SYMBOL(__security_initcall_start) = .; \
635 *(.security_initcall.init) \
636 VMLINUX_SYMBOL(__security_initcall_end) = .;
637
638#ifdef CONFIG_BLK_DEV_INITRD
639#define INIT_RAM_FS \
640 . = ALIGN(PAGE_SIZE); \
641 VMLINUX_SYMBOL(__initramfs_start) = .; \
642 *(.init.ramfs) \
643 VMLINUX_SYMBOL(__initramfs_end) = .;
644#else
David Howellseadfe212009-06-22 15:32:31 +0100645#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200646#endif
647
Tejun Heo023bf6f2009-07-09 11:27:40 +0900648/*
649 * Default discarded sections.
650 *
651 * Some archs want to discard exit text/data at runtime rather than
652 * link time due to cross-section references such as alt instructions,
653 * bug table, eh_frame, etc. DISCARDS must be the last of output
654 * section definitions so that such archs put those in earlier section
655 * definitions.
656 */
Tejun Heo405d9672009-06-24 15:13:38 +0900657#define DISCARDS \
658 /DISCARD/ : { \
659 EXIT_TEXT \
660 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900661 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900662 *(.discard) \
Jeremy Fitzhardingec7f52cd2010-07-22 22:58:01 -0700663 *(.discard.*) \
Tejun Heo405d9672009-06-24 15:13:38 +0900664 }
665
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900666/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900667 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900668 * @vaddr: explicit base address (optional)
669 * @phdr: destination PHDR (optional)
670 *
671 * Macro which expands to output section for percpu area. If @vaddr
672 * is not blank, it specifies explicit base address and all percpu
673 * symbols will be offset from the given address. If blank, @vaddr
674 * always equals @laddr + LOAD_OFFSET.
675 *
676 * @phdr defines the output PHDR to use if not blank. Be warned that
677 * output PHDR is sticky. If @phdr is specified, the next output
678 * section in the linker script will go there too. @phdr should have
679 * a leading colon.
680 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900681 * Note that this macros defines __per_cpu_load as an absolute symbol.
682 * If there is no need to put the percpu section at a predetermined
683 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900684 */
685#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100686 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100687 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900688 - LOAD_OFFSET) { \
689 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100690 *(.data..percpu..first) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800691 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100692 *(.data..percpu..page_aligned) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800693 *(.data..percpu..readmostly) \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100694 *(.data..percpu) \
695 *(.data..percpu..shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900696 VMLINUX_SYMBOL(__per_cpu_end) = .; \
697 } phdr \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100698 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900699
700/**
701 * PERCPU - define output section for percpu area, simple version
702 * @align: required alignment
703 *
704 * Align to @align and outputs output section for percpu area. This
705 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
706 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900707 *
708 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
709 * that __per_cpu_load is defined as a relative symbol against
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100710 * .data..percpu which is required for relocatable x86_32
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900711 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900712 */
713#define PERCPU(align) \
714 . = ALIGN(align); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100715 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900716 VMLINUX_SYMBOL(__per_cpu_load) = .; \
717 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100718 *(.data..percpu..first) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800719 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100720 *(.data..percpu..page_aligned) \
H. Peter Anvin2aeb66d2010-10-21 00:15:00 -0700721 *(.data..percpu..readmostly) \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100722 *(.data..percpu) \
723 *(.data..percpu..shared_aligned) \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900724 VMLINUX_SYMBOL(__per_cpu_end) = .; \
725 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200726
727
728/*
729 * Definition of the high level *_SECTION macros
730 * They will fit only a subset of the architectures
731 */
732
733
734/*
735 * Writeable data.
736 * All sections are combined in a single .data section.
737 * The sections following CONSTRUCTORS are arranged so their
738 * typical alignment matches.
739 * A cacheline is typical/always less than a PAGE_SIZE so
740 * the sections that has this restriction (or similar)
741 * is located before the ones requiring PAGE_SIZE alignment.
742 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
743 * matches the requirment of PAGE_ALIGNED_DATA.
744 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200745 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900746#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200747 . = ALIGN(PAGE_SIZE); \
748 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400749 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400750 NOSAVE_DATA \
751 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200752 CACHELINE_ALIGNED_DATA(cacheline) \
753 READ_MOSTLY_DATA(cacheline) \
754 DATA_DATA \
755 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200756 }
757
758#define INIT_TEXT_SECTION(inittext_align) \
759 . = ALIGN(inittext_align); \
760 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
761 VMLINUX_SYMBOL(_sinittext) = .; \
762 INIT_TEXT \
763 VMLINUX_SYMBOL(_einittext) = .; \
764 }
765
766#define INIT_DATA_SECTION(initsetup_align) \
767 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
768 INIT_DATA \
769 INIT_SETUP(initsetup_align) \
770 INIT_CALLS \
771 CON_INITCALL \
772 SECURITY_INITCALL \
773 INIT_RAM_FS \
774 }
775
Tim Abbott04e448d2009-07-12 18:23:33 -0400776#define BSS_SECTION(sbss_align, bss_align, stop_align) \
777 . = ALIGN(sbss_align); \
778 VMLINUX_SYMBOL(__bss_start) = .; \
779 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200780 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400781 . = ALIGN(stop_align); \
782 VMLINUX_SYMBOL(__bss_stop) = .;