blob: f4229fb315e1d7d81caddb7557cbcb6c65072fed [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) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100153 DEV_KEEP(init.data) \
154 DEV_KEEP(exit.data) \
155 CPU_KEEP(init.data) \
156 CPU_KEEP(exit.data) \
157 MEM_KEEP(init.data) \
158 MEM_KEEP(exit.data) \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500159 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400160 VMLINUX_SYMBOL(__start___tracepoints) = .; \
161 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500162 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500163 /* implement dynamic printk debug */ \
164 . = ALIGN(8); \
165 VMLINUX_SYMBOL(__start___verbose) = .; \
166 *(__verbose) \
167 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500168 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500169 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100170 TRACE_PRINTKS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200171 \
172 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100173 FTRACE_EVENTS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200174 \
175 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100176 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200177
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200178/*
179 * Data section helpers
180 */
181#define NOSAVE_DATA \
182 . = ALIGN(PAGE_SIZE); \
183 VMLINUX_SYMBOL(__nosave_begin) = .; \
Denys Vlasenko07b3bb12010-02-20 01:03:52 +0100184 *(.data..nosave) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200185 . = ALIGN(PAGE_SIZE); \
186 VMLINUX_SYMBOL(__nosave_end) = .;
187
188#define PAGE_ALIGNED_DATA(page_align) \
189 . = ALIGN(page_align); \
Tim Abbott75b13482010-02-20 01:03:37 +0100190 *(.data..page_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200191
192#define READ_MOSTLY_DATA(align) \
193 . = ALIGN(align); \
Denys Vlasenko54cb27a2010-02-20 01:03:44 +0100194 *(.data..read_mostly)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200195
196#define CACHELINE_ALIGNED_DATA(align) \
197 . = ALIGN(align); \
Tim Abbott4af57b72010-02-20 01:03:34 +0100198 *(.data..cacheline_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200199
Tim Abbott39a449d2009-06-23 18:53:15 -0400200#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200201 . = ALIGN(align); \
Tim Abbott2af76872010-02-20 01:03:35 +0100202 *(.data..init_task)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200203
204/*
205 * Read only Data
206 */
207#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200208 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100210 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 *(.rodata) *(.rodata.*) \
212 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700213 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400214 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 } \
216 \
217 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
218 *(.rodata1) \
219 } \
220 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200221 BUG_TABLE \
222 \
Jason Baronbf5438fc2010-09-17 11:09:00 -0400223 JUMP_TABLE \
224 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 /* PCI quirks */ \
226 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
227 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
228 *(.pci_fixup_early) \
229 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
230 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
231 *(.pci_fixup_header) \
232 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
233 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
234 *(.pci_fixup_final) \
235 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
236 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
237 *(.pci_fixup_enable) \
238 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800239 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
240 *(.pci_fixup_resume) \
241 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200242 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
243 *(.pci_fixup_resume_early) \
244 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
245 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
246 *(.pci_fixup_suspend) \
247 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 } \
249 \
David Woodhouse5658c762008-05-23 13:52:42 +0100250 /* Built-in firmware blobs */ \
251 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
252 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
253 *(.builtin_fw) \
254 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
255 } \
256 \
Matt Porter394b7012005-11-07 01:00:15 -0800257 /* RapidIO route ops */ \
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700258 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
Alexandre Bounine058f88d62010-05-26 14:44:03 -0700259 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
260 *(.rio_switch_ops) \
261 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
Matt Porter394b7012005-11-07 01:00:15 -0800262 } \
263 \
Jan Beulich63687a52008-05-12 15:44:41 +0200264 TRACEDATA \
265 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 /* Kernel symbol table: Normal symbols */ \
267 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
268 VMLINUX_SYMBOL(__start___ksymtab) = .; \
269 *(__ksymtab) \
270 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
271 } \
272 \
273 /* Kernel symbol table: GPL-only symbols */ \
274 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
275 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
276 *(__ksymtab_gpl) \
277 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
278 } \
279 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700280 /* Kernel symbol table: Normal unused symbols */ \
281 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
282 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
283 *(__ksymtab_unused) \
284 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
285 } \
286 \
287 /* Kernel symbol table: GPL-only unused symbols */ \
288 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
289 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
290 *(__ksymtab_unused_gpl) \
291 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
292 } \
293 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800294 /* Kernel symbol table: GPL-future-only symbols */ \
295 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
296 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
297 *(__ksymtab_gpl_future) \
298 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
299 } \
300 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 /* Kernel symbol table: Normal symbols */ \
302 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
303 VMLINUX_SYMBOL(__start___kcrctab) = .; \
304 *(__kcrctab) \
305 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
306 } \
307 \
308 /* Kernel symbol table: GPL-only symbols */ \
309 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
310 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
311 *(__kcrctab_gpl) \
312 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
313 } \
314 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700315 /* Kernel symbol table: Normal unused symbols */ \
316 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
317 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
318 *(__kcrctab_unused) \
319 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
320 } \
321 \
322 /* Kernel symbol table: GPL-only unused symbols */ \
323 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
324 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
325 *(__kcrctab_unused_gpl) \
326 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
327 } \
328 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800329 /* Kernel symbol table: GPL-future-only symbols */ \
330 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
331 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
332 *(__kcrctab_gpl_future) \
333 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
334 } \
335 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 /* Kernel symbol table: strings */ \
337 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
338 *(__ksymtab_strings) \
339 } \
340 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100341 /* __*init sections */ \
342 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100343 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100344 DEV_KEEP(init.rodata) \
345 DEV_KEEP(exit.rodata) \
346 CPU_KEEP(init.rodata) \
347 CPU_KEEP(exit.rodata) \
348 MEM_KEEP(init.rodata) \
349 MEM_KEEP(exit.rodata) \
350 } \
351 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 /* Built-in module parameters. */ \
353 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
354 VMLINUX_SYMBOL(__start___param) = .; \
355 *(__param) \
356 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100357 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100358 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700359 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200360 . = ALIGN((align));
361
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200362/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200363 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200364#define RODATA RO_DATA_SECTION(4096)
365#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700368 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 VMLINUX_SYMBOL(__security_initcall_start) = .; \
370 *(.security_initcall.init) \
371 VMLINUX_SYMBOL(__security_initcall_end) = .; \
372 }
373
Sam Ravnborg76647092007-05-13 00:31:33 +0200374/* .text section. Map to function alignment to avoid address changes
375 * during second ld run in second ld pass when generating System.map */
376#define TEXT_TEXT \
377 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100378 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200379 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100380 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100381 DEV_KEEP(init.text) \
382 DEV_KEEP(exit.text) \
383 CPU_KEEP(init.text) \
384 CPU_KEEP(exit.text) \
385 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100386 MEM_KEEP(exit.text) \
387 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100388
Sam Ravnborg76647092007-05-13 00:31:33 +0200389
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000390/* sched.text is aling to function alignment to secure we have same
391 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000393 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 VMLINUX_SYMBOL(__sched_text_start) = .; \
395 *(.sched.text) \
396 VMLINUX_SYMBOL(__sched_text_end) = .;
397
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000398/* spinlock.text is aling to function alignment to secure we have same
399 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000401 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 VMLINUX_SYMBOL(__lock_text_start) = .; \
403 *(.spinlock.text) \
404 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700405
406#define KPROBES_TEXT \
407 ALIGN_FUNCTION(); \
408 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
409 *(.kprobes.text) \
410 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200411
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100412#ifdef CONFIG_FUNCTION_GRAPH_TRACER
413#define IRQENTRY_TEXT \
414 ALIGN_FUNCTION(); \
415 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
416 *(.irqentry.text) \
417 VMLINUX_SYMBOL(__irqentry_text_end) = .;
418#else
419#define IRQENTRY_TEXT
420#endif
421
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100422/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200423#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100424
Sam Ravnborg7923f902009-06-14 22:10:41 +0200425#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200426 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
427 HEAD_TEXT \
428 }
429
430/*
431 * Exception table
432 */
433#define EXCEPTION_TABLE(align) \
434 . = ALIGN(align); \
435 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
436 VMLINUX_SYMBOL(__start___ex_table) = .; \
437 *(__ex_table) \
438 VMLINUX_SYMBOL(__stop___ex_table) = .; \
439 }
440
441/*
442 * Init task
443 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400444#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200445 . = ALIGN(align); \
Sam Ravnborgda5e37e2010-07-13 11:39:42 +0200446 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400447 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200448 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100449
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700450#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700451#define KERNEL_CTORS() . = ALIGN(8); \
452 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700453 *(.ctors) \
454 VMLINUX_SYMBOL(__ctors_end) = .;
455#else
456#define KERNEL_CTORS()
457#endif
458
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100459/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100460#define INIT_DATA \
461 *(.init.data) \
462 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100463 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100464 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700465 KERNEL_CTORS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000466 *(.init.rodata) \
John Reiser4b3b4c52009-07-27 11:23:50 -0700467 MCOUNT_REC() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000468 DEV_DISCARD(init.rodata) \
469 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500470 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100471
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100472#define INIT_TEXT \
473 *(.init.text) \
474 DEV_DISCARD(init.text) \
475 CPU_DISCARD(init.text) \
476 MEM_DISCARD(init.text)
477
478#define EXIT_DATA \
479 *(.exit.data) \
480 DEV_DISCARD(exit.data) \
481 DEV_DISCARD(exit.rodata) \
482 CPU_DISCARD(exit.data) \
483 CPU_DISCARD(exit.rodata) \
484 MEM_DISCARD(exit.data) \
485 MEM_DISCARD(exit.rodata)
486
487#define EXIT_TEXT \
488 *(.exit.text) \
489 DEV_DISCARD(exit.text) \
490 CPU_DISCARD(exit.text) \
491 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100492
Sam Ravnborg7923f902009-06-14 22:10:41 +0200493#define EXIT_CALL \
494 *(.exitcall.exit)
495
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200496/*
497 * bss (Block Started by Symbol) - uninitialized data
498 * zeroed during startup
499 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400500#define SBSS(sbss_align) \
501 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200502 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
503 *(.sbss) \
504 *(.scommon) \
505 }
506
507#define BSS(bss_align) \
508 . = ALIGN(bss_align); \
509 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
Tim Abbott7c74df02010-02-20 01:03:38 +0100510 *(.bss..page_aligned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200511 *(.dynbss) \
512 *(.bss) \
513 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200514 }
515
516/*
517 * DWARF debug sections.
518 * Symbols in the DWARF debugging sections are relative to
519 * the beginning of the section so we begin them at 0.
520 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200521#define DWARF_DEBUG \
522 /* DWARF 1 */ \
523 .debug 0 : { *(.debug) } \
524 .line 0 : { *(.line) } \
525 /* GNU DWARF 1 extensions */ \
526 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
527 .debug_sfnames 0 : { *(.debug_sfnames) } \
528 /* DWARF 1.1 and DWARF 2 */ \
529 .debug_aranges 0 : { *(.debug_aranges) } \
530 .debug_pubnames 0 : { *(.debug_pubnames) } \
531 /* DWARF 2 */ \
532 .debug_info 0 : { *(.debug_info \
533 .gnu.linkonce.wi.*) } \
534 .debug_abbrev 0 : { *(.debug_abbrev) } \
535 .debug_line 0 : { *(.debug_line) } \
536 .debug_frame 0 : { *(.debug_frame) } \
537 .debug_str 0 : { *(.debug_str) } \
538 .debug_loc 0 : { *(.debug_loc) } \
539 .debug_macinfo 0 : { *(.debug_macinfo) } \
540 /* SGI/MIPS DWARF 2 extensions */ \
541 .debug_weaknames 0 : { *(.debug_weaknames) } \
542 .debug_funcnames 0 : { *(.debug_funcnames) } \
543 .debug_typenames 0 : { *(.debug_typenames) } \
544 .debug_varnames 0 : { *(.debug_varnames) } \
545
546 /* Stabs debugging sections. */
547#define STABS_DEBUG \
548 .stab 0 : { *(.stab) } \
549 .stabstr 0 : { *(.stabstr) } \
550 .stab.excl 0 : { *(.stab.excl) } \
551 .stab.exclstr 0 : { *(.stab.exclstr) } \
552 .stab.index 0 : { *(.stab.index) } \
553 .stab.indexstr 0 : { *(.stab.indexstr) } \
554 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700555
Jan Beulich6360b1f2008-05-12 15:44:41 +0200556#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800557#define BUG_TABLE \
558 . = ALIGN(8); \
559 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700560 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800561 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700562 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800563 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200564#else
565#define BUG_TABLE
566#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800567
Jason Baronbf5438fc2010-09-17 11:09:00 -0400568#define JUMP_TABLE \
569 . = ALIGN(8); \
570 __jump_table : AT(ADDR(__jump_table) - LOAD_OFFSET) { \
571 VMLINUX_SYMBOL(__start___jump_table) = .; \
572 *(__jump_table) \
573 VMLINUX_SYMBOL(__stop___jump_table) = .; \
574 }
575
Jan Beulich63687a52008-05-12 15:44:41 +0200576#ifdef CONFIG_PM_TRACE
577#define TRACEDATA \
578 . = ALIGN(4); \
579 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700580 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200581 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700582 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200583 }
584#else
585#define TRACEDATA
586#endif
587
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700588#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700589 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
590 VMLINUX_SYMBOL(__start_notes) = .; \
591 *(.note.*) \
592 VMLINUX_SYMBOL(__stop_notes) = .; \
593 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700594
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200595#define INIT_SETUP(initsetup_align) \
596 . = ALIGN(initsetup_align); \
597 VMLINUX_SYMBOL(__setup_start) = .; \
598 *(.init.setup) \
599 VMLINUX_SYMBOL(__setup_end) = .;
600
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700601#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700602 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700603 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800604 *(.initcall0.init) \
605 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700606 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700607 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700608 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700609 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700610 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700611 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700612 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700613 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700614 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700615 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800616 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700617 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700618 *(.initcall6s.init) \
619 *(.initcall7.init) \
620 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700621
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200622#define INIT_CALLS \
623 VMLINUX_SYMBOL(__initcall_start) = .; \
624 INITCALLS \
625 VMLINUX_SYMBOL(__initcall_end) = .;
626
627#define CON_INITCALL \
628 VMLINUX_SYMBOL(__con_initcall_start) = .; \
629 *(.con_initcall.init) \
630 VMLINUX_SYMBOL(__con_initcall_end) = .;
631
632#define SECURITY_INITCALL \
633 VMLINUX_SYMBOL(__security_initcall_start) = .; \
634 *(.security_initcall.init) \
635 VMLINUX_SYMBOL(__security_initcall_end) = .;
636
637#ifdef CONFIG_BLK_DEV_INITRD
638#define INIT_RAM_FS \
639 . = ALIGN(PAGE_SIZE); \
640 VMLINUX_SYMBOL(__initramfs_start) = .; \
641 *(.init.ramfs) \
642 VMLINUX_SYMBOL(__initramfs_end) = .;
643#else
David Howellseadfe212009-06-22 15:32:31 +0100644#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200645#endif
646
Tejun Heo023bf6f2009-07-09 11:27:40 +0900647/*
648 * Default discarded sections.
649 *
650 * Some archs want to discard exit text/data at runtime rather than
651 * link time due to cross-section references such as alt instructions,
652 * bug table, eh_frame, etc. DISCARDS must be the last of output
653 * section definitions so that such archs put those in earlier section
654 * definitions.
655 */
Tejun Heo405d9672009-06-24 15:13:38 +0900656#define DISCARDS \
657 /DISCARD/ : { \
658 EXIT_TEXT \
659 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900660 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900661 *(.discard) \
Jeremy Fitzhardingec7f52cd2010-07-22 22:58:01 -0700662 *(.discard.*) \
Tejun Heo405d9672009-06-24 15:13:38 +0900663 }
664
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900665/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900666 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900667 * @vaddr: explicit base address (optional)
668 * @phdr: destination PHDR (optional)
669 *
670 * Macro which expands to output section for percpu area. If @vaddr
671 * is not blank, it specifies explicit base address and all percpu
672 * symbols will be offset from the given address. If blank, @vaddr
673 * always equals @laddr + LOAD_OFFSET.
674 *
675 * @phdr defines the output PHDR to use if not blank. Be warned that
676 * output PHDR is sticky. If @phdr is specified, the next output
677 * section in the linker script will go there too. @phdr should have
678 * a leading colon.
679 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900680 * Note that this macros defines __per_cpu_load as an absolute symbol.
681 * If there is no need to put the percpu section at a predetermined
682 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900683 */
684#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100685 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100686 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900687 - LOAD_OFFSET) { \
688 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100689 *(.data..percpu..first) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800690 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100691 *(.data..percpu..page_aligned) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800692 *(.data..percpu..readmostly) \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100693 *(.data..percpu) \
694 *(.data..percpu..shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900695 VMLINUX_SYMBOL(__per_cpu_end) = .; \
696 } phdr \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100697 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900698
699/**
700 * PERCPU - define output section for percpu area, simple version
701 * @align: required alignment
702 *
703 * Align to @align and outputs output section for percpu area. This
704 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
705 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900706 *
707 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
708 * that __per_cpu_load is defined as a relative symbol against
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100709 * .data..percpu which is required for relocatable x86_32
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900710 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900711 */
712#define PERCPU(align) \
713 . = ALIGN(align); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100714 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900715 VMLINUX_SYMBOL(__per_cpu_load) = .; \
716 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100717 *(.data..percpu..first) \
Shaohua Lic957ef22010-10-20 11:07:02 +0800718 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100719 *(.data..percpu..page_aligned) \
H. Peter Anvin2aeb66d2010-10-21 00:15:00 -0700720 *(.data..percpu..readmostly) \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100721 *(.data..percpu) \
722 *(.data..percpu..shared_aligned) \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900723 VMLINUX_SYMBOL(__per_cpu_end) = .; \
724 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200725
726
727/*
728 * Definition of the high level *_SECTION macros
729 * They will fit only a subset of the architectures
730 */
731
732
733/*
734 * Writeable data.
735 * All sections are combined in a single .data section.
736 * The sections following CONSTRUCTORS are arranged so their
737 * typical alignment matches.
738 * A cacheline is typical/always less than a PAGE_SIZE so
739 * the sections that has this restriction (or similar)
740 * is located before the ones requiring PAGE_SIZE alignment.
741 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
742 * matches the requirment of PAGE_ALIGNED_DATA.
743 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200744 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900745#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200746 . = ALIGN(PAGE_SIZE); \
747 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400748 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400749 NOSAVE_DATA \
750 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200751 CACHELINE_ALIGNED_DATA(cacheline) \
752 READ_MOSTLY_DATA(cacheline) \
753 DATA_DATA \
754 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200755 }
756
757#define INIT_TEXT_SECTION(inittext_align) \
758 . = ALIGN(inittext_align); \
759 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
760 VMLINUX_SYMBOL(_sinittext) = .; \
761 INIT_TEXT \
762 VMLINUX_SYMBOL(_einittext) = .; \
763 }
764
765#define INIT_DATA_SECTION(initsetup_align) \
766 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
767 INIT_DATA \
768 INIT_SETUP(initsetup_align) \
769 INIT_CALLS \
770 CON_INITCALL \
771 SECURITY_INITCALL \
772 INIT_RAM_FS \
773 }
774
Tim Abbott04e448d2009-07-12 18:23:33 -0400775#define BSS_SECTION(sbss_align, bss_align, stop_align) \
776 . = ALIGN(sbss_align); \
777 VMLINUX_SYMBOL(__bss_start) = .; \
778 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200779 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400780 . = ALIGN(stop_align); \
781 VMLINUX_SYMBOL(__bss_stop) = .;