blob: 98b37cf3ac6d0346f86f60e47449e7583acfed9d [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 *
36 * /DISCARD/ : {
37 * EXIT_TEXT
38 * EXIT_DATA
Sam Ravnborg7923f902009-06-14 22:10:41 +020039 * EXIT_CALL
Sam Ravnborgef53dae2009-06-07 20:46:37 +020040 * }
41 * STABS_DEBUG
42 * DWARF_DEBUG
43 * }
44 *
45 * [__init_begin, __init_end] is the init section that may be freed after init
46 * [_stext, _etext] is the text section
47 * [_sdata, _edata] is the data section
48 *
49 * Some of the included output section have their own set of constants.
50 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
51 * [__nosave_begin, __nosave_end] for the nosave data
52 */
Tim Abbottc80d4712009-04-25 22:10:56 -040053
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#ifndef LOAD_OFFSET
55#define LOAD_OFFSET 0
56#endif
57
58#ifndef VMLINUX_SYMBOL
59#define VMLINUX_SYMBOL(_sym_) _sym_
60#endif
61
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +000062/* Align . to a 8 byte boundary equals to maximum function alignment. */
63#define ALIGN_FUNCTION() . = ALIGN(8)
64
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010065/* The actual configuration determine if the init/exit sections
66 * are handled as text/data or they can be discarded (which
67 * often happens at runtime)
68 */
69#ifdef CONFIG_HOTPLUG
70#define DEV_KEEP(sec) *(.dev##sec)
71#define DEV_DISCARD(sec)
72#else
73#define DEV_KEEP(sec)
74#define DEV_DISCARD(sec) *(.dev##sec)
75#endif
76
77#ifdef CONFIG_HOTPLUG_CPU
78#define CPU_KEEP(sec) *(.cpu##sec)
79#define CPU_DISCARD(sec)
80#else
81#define CPU_KEEP(sec)
82#define CPU_DISCARD(sec) *(.cpu##sec)
83#endif
84
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010085#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010086#define MEM_KEEP(sec) *(.mem##sec)
87#define MEM_DISCARD(sec)
88#else
89#define MEM_KEEP(sec)
90#define MEM_DISCARD(sec) *(.mem##sec)
91#endif
92
Steven Rostedt8da38212008-08-14 15:45:07 -040093#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -070094#define MCOUNT_REC() . = ALIGN(8); \
95 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -040096 *(__mcount_loc) \
97 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
98#else
99#define MCOUNT_REC()
100#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100101
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500102#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500103#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
104 *(_ftrace_annotated_branch) \
105 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500106#else
107#define LIKELY_PROFILE()
108#endif
109
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500110#ifdef CONFIG_PROFILE_ALL_BRANCHES
111#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
112 *(_ftrace_branch) \
113 VMLINUX_SYMBOL(__stop_branch_profile) = .;
114#else
115#define BRANCH_PROFILE()
116#endif
117
Tom Zanussi5f77a882009-04-08 03:14:01 -0500118#ifdef CONFIG_EVENT_TRACING
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500119#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
120 *(_ftrace_events) \
121 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
122#else
123#define FTRACE_EVENTS()
124#endif
125
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100126#ifdef CONFIG_TRACING
127#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
128 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
129 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
130#else
131#define TRACE_PRINTKS()
132#endif
133
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100134#ifdef CONFIG_FTRACE_SYSCALLS
135#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
136 *(__syscalls_metadata) \
137 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
138#else
139#define TRACE_SYSCALLS()
140#endif
141
Sam Ravnborgca967252007-05-17 13:38:44 +0200142/* .data section */
143#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200144 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100145 *(.ref.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100146 DEV_KEEP(init.data) \
147 DEV_KEEP(exit.data) \
148 CPU_KEEP(init.data) \
149 CPU_KEEP(exit.data) \
150 MEM_KEEP(init.data) \
151 MEM_KEEP(exit.data) \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700152 . = ALIGN(8); \
153 VMLINUX_SYMBOL(__start___markers) = .; \
154 *(__markers) \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400155 VMLINUX_SYMBOL(__stop___markers) = .; \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500156 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400157 VMLINUX_SYMBOL(__start___tracepoints) = .; \
158 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500159 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500160 /* implement dynamic printk debug */ \
161 . = ALIGN(8); \
162 VMLINUX_SYMBOL(__start___verbose) = .; \
163 *(__verbose) \
164 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500165 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500166 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100167 TRACE_PRINTKS() \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100168 FTRACE_EVENTS() \
169 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200170
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200171/*
172 * Data section helpers
173 */
174#define NOSAVE_DATA \
175 . = ALIGN(PAGE_SIZE); \
176 VMLINUX_SYMBOL(__nosave_begin) = .; \
177 *(.data.nosave) \
178 . = ALIGN(PAGE_SIZE); \
179 VMLINUX_SYMBOL(__nosave_end) = .;
180
181#define PAGE_ALIGNED_DATA(page_align) \
182 . = ALIGN(page_align); \
183 *(.data.page_aligned)
184
185#define READ_MOSTLY_DATA(align) \
186 . = ALIGN(align); \
187 *(.data.read_mostly)
188
189#define CACHELINE_ALIGNED_DATA(align) \
190 . = ALIGN(align); \
191 *(.data.cacheline_aligned)
192
Tim Abbott39a449d2009-06-23 18:53:15 -0400193#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200194 . = ALIGN(align); \
195 *(.data.init_task)
196
197/*
198 * Read only Data
199 */
200#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200201 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100203 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 *(.rodata) *(.rodata.*) \
205 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700206 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400207 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 } \
209 \
210 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
211 *(.rodata1) \
212 } \
213 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200214 BUG_TABLE \
215 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 /* PCI quirks */ \
217 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
218 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
219 *(.pci_fixup_early) \
220 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
221 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
222 *(.pci_fixup_header) \
223 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
224 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
225 *(.pci_fixup_final) \
226 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
227 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
228 *(.pci_fixup_enable) \
229 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800230 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
231 *(.pci_fixup_resume) \
232 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200233 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
234 *(.pci_fixup_resume_early) \
235 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
236 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
237 *(.pci_fixup_suspend) \
238 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 } \
240 \
David Woodhouse5658c762008-05-23 13:52:42 +0100241 /* Built-in firmware blobs */ \
242 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
243 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
244 *(.builtin_fw) \
245 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
246 } \
247 \
Matt Porter394b7012005-11-07 01:00:15 -0800248 /* RapidIO route ops */ \
249 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
250 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
251 *(.rio_route_ops) \
252 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
253 } \
254 \
Jan Beulich63687a52008-05-12 15:44:41 +0200255 TRACEDATA \
256 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 /* Kernel symbol table: Normal symbols */ \
258 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
259 VMLINUX_SYMBOL(__start___ksymtab) = .; \
260 *(__ksymtab) \
261 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
262 } \
263 \
264 /* Kernel symbol table: GPL-only symbols */ \
265 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
266 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
267 *(__ksymtab_gpl) \
268 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
269 } \
270 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700271 /* Kernel symbol table: Normal unused symbols */ \
272 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
273 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
274 *(__ksymtab_unused) \
275 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
276 } \
277 \
278 /* Kernel symbol table: GPL-only unused symbols */ \
279 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
280 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
281 *(__ksymtab_unused_gpl) \
282 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
283 } \
284 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800285 /* Kernel symbol table: GPL-future-only symbols */ \
286 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
287 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
288 *(__ksymtab_gpl_future) \
289 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
290 } \
291 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 /* Kernel symbol table: Normal symbols */ \
293 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
294 VMLINUX_SYMBOL(__start___kcrctab) = .; \
295 *(__kcrctab) \
296 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
297 } \
298 \
299 /* Kernel symbol table: GPL-only symbols */ \
300 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
301 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
302 *(__kcrctab_gpl) \
303 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
304 } \
305 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700306 /* Kernel symbol table: Normal unused symbols */ \
307 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
308 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
309 *(__kcrctab_unused) \
310 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
311 } \
312 \
313 /* Kernel symbol table: GPL-only unused symbols */ \
314 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
315 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
316 *(__kcrctab_unused_gpl) \
317 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
318 } \
319 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800320 /* Kernel symbol table: GPL-future-only symbols */ \
321 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
322 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
323 *(__kcrctab_gpl_future) \
324 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
325 } \
326 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 /* Kernel symbol table: strings */ \
328 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
329 *(__ksymtab_strings) \
330 } \
331 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100332 /* __*init sections */ \
333 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100334 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100335 DEV_KEEP(init.rodata) \
336 DEV_KEEP(exit.rodata) \
337 CPU_KEEP(init.rodata) \
338 CPU_KEEP(exit.rodata) \
339 MEM_KEEP(init.rodata) \
340 MEM_KEEP(exit.rodata) \
341 } \
342 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 /* Built-in module parameters. */ \
344 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
345 VMLINUX_SYMBOL(__start___param) = .; \
346 *(__param) \
347 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100348 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100349 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700350 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200351 . = ALIGN((align));
352
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200353/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200354 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200355#define RODATA RO_DATA_SECTION(4096)
356#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700359 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 VMLINUX_SYMBOL(__security_initcall_start) = .; \
361 *(.security_initcall.init) \
362 VMLINUX_SYMBOL(__security_initcall_end) = .; \
363 }
364
Sam Ravnborg76647092007-05-13 00:31:33 +0200365/* .text section. Map to function alignment to avoid address changes
366 * during second ld run in second ld pass when generating System.map */
367#define TEXT_TEXT \
368 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100369 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200370 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100371 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100372 DEV_KEEP(init.text) \
373 DEV_KEEP(exit.text) \
374 CPU_KEEP(init.text) \
375 CPU_KEEP(exit.text) \
376 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100377 MEM_KEEP(exit.text) \
378 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100379
Sam Ravnborg76647092007-05-13 00:31:33 +0200380
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000381/* sched.text is aling to function alignment to secure we have same
382 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000384 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 VMLINUX_SYMBOL(__sched_text_start) = .; \
386 *(.sched.text) \
387 VMLINUX_SYMBOL(__sched_text_end) = .;
388
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000389/* spinlock.text is aling to function alignment to secure we have same
390 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000392 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 VMLINUX_SYMBOL(__lock_text_start) = .; \
394 *(.spinlock.text) \
395 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700396
397#define KPROBES_TEXT \
398 ALIGN_FUNCTION(); \
399 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
400 *(.kprobes.text) \
401 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200402
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100403#ifdef CONFIG_FUNCTION_GRAPH_TRACER
404#define IRQENTRY_TEXT \
405 ALIGN_FUNCTION(); \
406 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
407 *(.irqentry.text) \
408 VMLINUX_SYMBOL(__irqentry_text_end) = .;
409#else
410#define IRQENTRY_TEXT
411#endif
412
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100413/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200414#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100415
Sam Ravnborg7923f902009-06-14 22:10:41 +0200416#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200417 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
418 HEAD_TEXT \
419 }
420
421/*
422 * Exception table
423 */
424#define EXCEPTION_TABLE(align) \
425 . = ALIGN(align); \
426 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
427 VMLINUX_SYMBOL(__start___ex_table) = .; \
428 *(__ex_table) \
429 VMLINUX_SYMBOL(__stop___ex_table) = .; \
430 }
431
432/*
433 * Init task
434 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400435#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200436 . = ALIGN(align); \
437 .data.init_task : { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400438 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200439 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100440
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700441#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700442#define KERNEL_CTORS() . = ALIGN(8); \
443 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700444 *(.ctors) \
445 VMLINUX_SYMBOL(__ctors_end) = .;
446#else
447#define KERNEL_CTORS()
448#endif
449
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100450/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100451#define INIT_DATA \
452 *(.init.data) \
453 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100454 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100455 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700456 KERNEL_CTORS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000457 *(.init.rodata) \
John Reiser4b3b4c52009-07-27 11:23:50 -0700458 MCOUNT_REC() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000459 DEV_DISCARD(init.rodata) \
460 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500461 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100462
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100463#define INIT_TEXT \
464 *(.init.text) \
465 DEV_DISCARD(init.text) \
466 CPU_DISCARD(init.text) \
467 MEM_DISCARD(init.text)
468
469#define EXIT_DATA \
470 *(.exit.data) \
471 DEV_DISCARD(exit.data) \
472 DEV_DISCARD(exit.rodata) \
473 CPU_DISCARD(exit.data) \
474 CPU_DISCARD(exit.rodata) \
475 MEM_DISCARD(exit.data) \
476 MEM_DISCARD(exit.rodata)
477
478#define EXIT_TEXT \
479 *(.exit.text) \
480 DEV_DISCARD(exit.text) \
481 CPU_DISCARD(exit.text) \
482 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100483
Sam Ravnborg7923f902009-06-14 22:10:41 +0200484#define EXIT_CALL \
485 *(.exitcall.exit)
486
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200487/*
488 * bss (Block Started by Symbol) - uninitialized data
489 * zeroed during startup
490 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400491#define SBSS(sbss_align) \
492 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200493 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
494 *(.sbss) \
495 *(.scommon) \
496 }
497
498#define BSS(bss_align) \
499 . = ALIGN(bss_align); \
500 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200501 *(.bss.page_aligned) \
502 *(.dynbss) \
503 *(.bss) \
504 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200505 }
506
507/*
508 * DWARF debug sections.
509 * Symbols in the DWARF debugging sections are relative to
510 * the beginning of the section so we begin them at 0.
511 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200512#define DWARF_DEBUG \
513 /* DWARF 1 */ \
514 .debug 0 : { *(.debug) } \
515 .line 0 : { *(.line) } \
516 /* GNU DWARF 1 extensions */ \
517 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
518 .debug_sfnames 0 : { *(.debug_sfnames) } \
519 /* DWARF 1.1 and DWARF 2 */ \
520 .debug_aranges 0 : { *(.debug_aranges) } \
521 .debug_pubnames 0 : { *(.debug_pubnames) } \
522 /* DWARF 2 */ \
523 .debug_info 0 : { *(.debug_info \
524 .gnu.linkonce.wi.*) } \
525 .debug_abbrev 0 : { *(.debug_abbrev) } \
526 .debug_line 0 : { *(.debug_line) } \
527 .debug_frame 0 : { *(.debug_frame) } \
528 .debug_str 0 : { *(.debug_str) } \
529 .debug_loc 0 : { *(.debug_loc) } \
530 .debug_macinfo 0 : { *(.debug_macinfo) } \
531 /* SGI/MIPS DWARF 2 extensions */ \
532 .debug_weaknames 0 : { *(.debug_weaknames) } \
533 .debug_funcnames 0 : { *(.debug_funcnames) } \
534 .debug_typenames 0 : { *(.debug_typenames) } \
535 .debug_varnames 0 : { *(.debug_varnames) } \
536
537 /* Stabs debugging sections. */
538#define STABS_DEBUG \
539 .stab 0 : { *(.stab) } \
540 .stabstr 0 : { *(.stabstr) } \
541 .stab.excl 0 : { *(.stab.excl) } \
542 .stab.exclstr 0 : { *(.stab.exclstr) } \
543 .stab.index 0 : { *(.stab.index) } \
544 .stab.indexstr 0 : { *(.stab.indexstr) } \
545 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700546
Jan Beulich6360b1f2008-05-12 15:44:41 +0200547#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800548#define BUG_TABLE \
549 . = ALIGN(8); \
550 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700551 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800552 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700553 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800554 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200555#else
556#define BUG_TABLE
557#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800558
Jan Beulich63687a52008-05-12 15:44:41 +0200559#ifdef CONFIG_PM_TRACE
560#define TRACEDATA \
561 . = ALIGN(4); \
562 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700563 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200564 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700565 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200566 }
567#else
568#define TRACEDATA
569#endif
570
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700571#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700572 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
573 VMLINUX_SYMBOL(__start_notes) = .; \
574 *(.note.*) \
575 VMLINUX_SYMBOL(__stop_notes) = .; \
576 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700577
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200578#define INIT_SETUP(initsetup_align) \
579 . = ALIGN(initsetup_align); \
580 VMLINUX_SYMBOL(__setup_start) = .; \
581 *(.init.setup) \
582 VMLINUX_SYMBOL(__setup_end) = .;
583
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700584#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700585 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700586 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800587 *(.initcall0.init) \
588 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700589 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700590 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700591 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700592 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700593 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700594 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700595 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700596 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700597 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700598 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800599 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700600 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700601 *(.initcall6s.init) \
602 *(.initcall7.init) \
603 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700604
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200605#define INIT_CALLS \
606 VMLINUX_SYMBOL(__initcall_start) = .; \
607 INITCALLS \
608 VMLINUX_SYMBOL(__initcall_end) = .;
609
610#define CON_INITCALL \
611 VMLINUX_SYMBOL(__con_initcall_start) = .; \
612 *(.con_initcall.init) \
613 VMLINUX_SYMBOL(__con_initcall_end) = .;
614
615#define SECURITY_INITCALL \
616 VMLINUX_SYMBOL(__security_initcall_start) = .; \
617 *(.security_initcall.init) \
618 VMLINUX_SYMBOL(__security_initcall_end) = .;
619
620#ifdef CONFIG_BLK_DEV_INITRD
621#define INIT_RAM_FS \
622 . = ALIGN(PAGE_SIZE); \
623 VMLINUX_SYMBOL(__initramfs_start) = .; \
624 *(.init.ramfs) \
625 VMLINUX_SYMBOL(__initramfs_end) = .;
626#else
David Howellseadfe212009-06-22 15:32:31 +0100627#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200628#endif
629
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900630/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900631 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900632 * @vaddr: explicit base address (optional)
633 * @phdr: destination PHDR (optional)
634 *
635 * Macro which expands to output section for percpu area. If @vaddr
636 * is not blank, it specifies explicit base address and all percpu
637 * symbols will be offset from the given address. If blank, @vaddr
638 * always equals @laddr + LOAD_OFFSET.
639 *
640 * @phdr defines the output PHDR to use if not blank. Be warned that
641 * output PHDR is sticky. If @phdr is specified, the next output
642 * section in the linker script will go there too. @phdr should have
643 * a leading colon.
644 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900645 * Note that this macros defines __per_cpu_load as an absolute symbol.
646 * If there is no need to put the percpu section at a predetermined
647 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900648 */
649#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100650 VMLINUX_SYMBOL(__per_cpu_load) = .; \
651 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900652 - LOAD_OFFSET) { \
653 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Brian Gerst0bd74fa2009-01-19 12:21:27 +0900654 *(.data.percpu.first) \
Eric Dumazet63cc8c72008-05-12 15:44:40 +0200655 *(.data.percpu.page_aligned) \
Fenghua Yu5fb7dc32007-07-19 01:48:12 -0700656 *(.data.percpu) \
657 *(.data.percpu.shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900658 VMLINUX_SYMBOL(__per_cpu_end) = .; \
659 } phdr \
Ingo Molnardba3d362009-01-29 17:10:12 +0100660 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900661
662/**
663 * PERCPU - define output section for percpu area, simple version
664 * @align: required alignment
665 *
666 * Align to @align and outputs output section for percpu area. This
667 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
668 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900669 *
670 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
671 * that __per_cpu_load is defined as a relative symbol against
672 * .data.percpu which is required for relocatable x86_32
673 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900674 */
675#define PERCPU(align) \
676 . = ALIGN(align); \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900677 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
678 VMLINUX_SYMBOL(__per_cpu_load) = .; \
679 VMLINUX_SYMBOL(__per_cpu_start) = .; \
680 *(.data.percpu.first) \
681 *(.data.percpu.page_aligned) \
682 *(.data.percpu) \
683 *(.data.percpu.shared_aligned) \
684 VMLINUX_SYMBOL(__per_cpu_end) = .; \
685 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200686
687
688/*
689 * Definition of the high level *_SECTION macros
690 * They will fit only a subset of the architectures
691 */
692
693
694/*
695 * Writeable data.
696 * All sections are combined in a single .data section.
697 * The sections following CONSTRUCTORS are arranged so their
698 * typical alignment matches.
699 * A cacheline is typical/always less than a PAGE_SIZE so
700 * the sections that has this restriction (or similar)
701 * is located before the ones requiring PAGE_SIZE alignment.
702 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
703 * matches the requirment of PAGE_ALIGNED_DATA.
704 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200705 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900706#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200707 . = ALIGN(PAGE_SIZE); \
708 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400709 INIT_TASK_DATA(inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200710 CACHELINE_ALIGNED_DATA(cacheline) \
711 READ_MOSTLY_DATA(cacheline) \
712 DATA_DATA \
713 CONSTRUCTORS \
Paul Mundt73f1d932009-06-24 01:04:36 +0900714 NOSAVE_DATA \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200715 PAGE_ALIGNED_DATA(pagealigned) \
716 }
717
718#define INIT_TEXT_SECTION(inittext_align) \
719 . = ALIGN(inittext_align); \
720 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
721 VMLINUX_SYMBOL(_sinittext) = .; \
722 INIT_TEXT \
723 VMLINUX_SYMBOL(_einittext) = .; \
724 }
725
726#define INIT_DATA_SECTION(initsetup_align) \
727 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
728 INIT_DATA \
729 INIT_SETUP(initsetup_align) \
730 INIT_CALLS \
731 CON_INITCALL \
732 SECURITY_INITCALL \
733 INIT_RAM_FS \
734 }
735
Tim Abbott04e448d2009-07-12 18:23:33 -0400736#define BSS_SECTION(sbss_align, bss_align, stop_align) \
737 . = ALIGN(sbss_align); \
738 VMLINUX_SYMBOL(__bss_start) = .; \
739 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200740 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400741 . = ALIGN(stop_align); \
742 VMLINUX_SYMBOL(__bss_stop) = .;