blob: b6e818f4b24756a4a7eeb570260a9894490acb4c [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
55#ifndef VMLINUX_SYMBOL
56#define VMLINUX_SYMBOL(_sym_) _sym_
57#endif
58
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +000059/* Align . to a 8 byte boundary equals to maximum function alignment. */
60#define ALIGN_FUNCTION() . = ALIGN(8)
61
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010062/* The actual configuration determine if the init/exit sections
63 * are handled as text/data or they can be discarded (which
64 * often happens at runtime)
65 */
66#ifdef CONFIG_HOTPLUG
67#define DEV_KEEP(sec) *(.dev##sec)
68#define DEV_DISCARD(sec)
69#else
70#define DEV_KEEP(sec)
71#define DEV_DISCARD(sec) *(.dev##sec)
72#endif
73
74#ifdef CONFIG_HOTPLUG_CPU
75#define CPU_KEEP(sec) *(.cpu##sec)
76#define CPU_DISCARD(sec)
77#else
78#define CPU_KEEP(sec)
79#define CPU_DISCARD(sec) *(.cpu##sec)
80#endif
81
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010082#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010083#define MEM_KEEP(sec) *(.mem##sec)
84#define MEM_DISCARD(sec)
85#else
86#define MEM_KEEP(sec)
87#define MEM_DISCARD(sec) *(.mem##sec)
88#endif
89
Steven Rostedt8da38212008-08-14 15:45:07 -040090#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -070091#define MCOUNT_REC() . = ALIGN(8); \
92 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -040093 *(__mcount_loc) \
94 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
95#else
96#define MCOUNT_REC()
97#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010098
Steven Rostedt2ed84ee2008-11-12 15:24:24 -050099#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500100#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
101 *(_ftrace_annotated_branch) \
102 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500103#else
104#define LIKELY_PROFILE()
105#endif
106
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500107#ifdef CONFIG_PROFILE_ALL_BRANCHES
108#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
109 *(_ftrace_branch) \
110 VMLINUX_SYMBOL(__stop_branch_profile) = .;
111#else
112#define BRANCH_PROFILE()
113#endif
114
Tom Zanussi5f77a882009-04-08 03:14:01 -0500115#ifdef CONFIG_EVENT_TRACING
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500116#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
117 *(_ftrace_events) \
118 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
119#else
120#define FTRACE_EVENTS()
121#endif
122
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100123#ifdef CONFIG_TRACING
124#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
125 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
126 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
127#else
128#define TRACE_PRINTKS()
129#endif
130
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100131#ifdef CONFIG_FTRACE_SYSCALLS
132#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
133 *(__syscalls_metadata) \
134 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
135#else
136#define TRACE_SYSCALLS()
137#endif
138
Sam Ravnborgca967252007-05-17 13:38:44 +0200139/* .data section */
140#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200141 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100142 *(.ref.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100143 DEV_KEEP(init.data) \
144 DEV_KEEP(exit.data) \
145 CPU_KEEP(init.data) \
146 CPU_KEEP(exit.data) \
147 MEM_KEEP(init.data) \
148 MEM_KEEP(exit.data) \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700149 . = ALIGN(8); \
150 VMLINUX_SYMBOL(__start___markers) = .; \
151 *(__markers) \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400152 VMLINUX_SYMBOL(__stop___markers) = .; \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500153 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400154 VMLINUX_SYMBOL(__start___tracepoints) = .; \
155 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500156 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500157 /* implement dynamic printk debug */ \
158 . = ALIGN(8); \
159 VMLINUX_SYMBOL(__start___verbose) = .; \
160 *(__verbose) \
161 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500162 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500163 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100164 TRACE_PRINTKS() \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100165 FTRACE_EVENTS() \
166 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200167
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200168/*
169 * Data section helpers
170 */
171#define NOSAVE_DATA \
172 . = ALIGN(PAGE_SIZE); \
173 VMLINUX_SYMBOL(__nosave_begin) = .; \
174 *(.data.nosave) \
175 . = ALIGN(PAGE_SIZE); \
176 VMLINUX_SYMBOL(__nosave_end) = .;
177
178#define PAGE_ALIGNED_DATA(page_align) \
179 . = ALIGN(page_align); \
180 *(.data.page_aligned)
181
182#define READ_MOSTLY_DATA(align) \
183 . = ALIGN(align); \
184 *(.data.read_mostly)
185
186#define CACHELINE_ALIGNED_DATA(align) \
187 . = ALIGN(align); \
188 *(.data.cacheline_aligned)
189
Tim Abbott39a449d2009-06-23 18:53:15 -0400190#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200191 . = ALIGN(align); \
192 *(.data.init_task)
193
194/*
195 * Read only Data
196 */
197#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200198 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100200 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 *(.rodata) *(.rodata.*) \
202 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700203 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400204 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 } \
206 \
207 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
208 *(.rodata1) \
209 } \
210 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200211 BUG_TABLE \
212 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 /* PCI quirks */ \
214 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
215 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
216 *(.pci_fixup_early) \
217 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
218 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
219 *(.pci_fixup_header) \
220 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
221 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
222 *(.pci_fixup_final) \
223 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
224 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
225 *(.pci_fixup_enable) \
226 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800227 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
228 *(.pci_fixup_resume) \
229 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200230 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
231 *(.pci_fixup_resume_early) \
232 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
233 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
234 *(.pci_fixup_suspend) \
235 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 } \
237 \
David Woodhouse5658c762008-05-23 13:52:42 +0100238 /* Built-in firmware blobs */ \
239 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
240 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
241 *(.builtin_fw) \
242 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
243 } \
244 \
Matt Porter394b7012005-11-07 01:00:15 -0800245 /* RapidIO route ops */ \
246 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
247 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
248 *(.rio_route_ops) \
249 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
250 } \
251 \
Jan Beulich63687a52008-05-12 15:44:41 +0200252 TRACEDATA \
253 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 /* Kernel symbol table: Normal symbols */ \
255 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
256 VMLINUX_SYMBOL(__start___ksymtab) = .; \
257 *(__ksymtab) \
258 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
259 } \
260 \
261 /* Kernel symbol table: GPL-only symbols */ \
262 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
263 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
264 *(__ksymtab_gpl) \
265 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
266 } \
267 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700268 /* Kernel symbol table: Normal unused symbols */ \
269 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
270 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
271 *(__ksymtab_unused) \
272 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
273 } \
274 \
275 /* Kernel symbol table: GPL-only unused symbols */ \
276 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
277 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
278 *(__ksymtab_unused_gpl) \
279 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
280 } \
281 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800282 /* Kernel symbol table: GPL-future-only symbols */ \
283 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
284 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
285 *(__ksymtab_gpl_future) \
286 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
287 } \
288 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 /* Kernel symbol table: Normal symbols */ \
290 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
291 VMLINUX_SYMBOL(__start___kcrctab) = .; \
292 *(__kcrctab) \
293 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
294 } \
295 \
296 /* Kernel symbol table: GPL-only symbols */ \
297 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
298 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
299 *(__kcrctab_gpl) \
300 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
301 } \
302 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700303 /* Kernel symbol table: Normal unused symbols */ \
304 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
305 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
306 *(__kcrctab_unused) \
307 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
308 } \
309 \
310 /* Kernel symbol table: GPL-only unused symbols */ \
311 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
312 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
313 *(__kcrctab_unused_gpl) \
314 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
315 } \
316 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800317 /* Kernel symbol table: GPL-future-only symbols */ \
318 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
319 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
320 *(__kcrctab_gpl_future) \
321 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
322 } \
323 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 /* Kernel symbol table: strings */ \
325 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
326 *(__ksymtab_strings) \
327 } \
328 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100329 /* __*init sections */ \
330 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100331 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100332 DEV_KEEP(init.rodata) \
333 DEV_KEEP(exit.rodata) \
334 CPU_KEEP(init.rodata) \
335 CPU_KEEP(exit.rodata) \
336 MEM_KEEP(init.rodata) \
337 MEM_KEEP(exit.rodata) \
338 } \
339 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 /* Built-in module parameters. */ \
341 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
342 VMLINUX_SYMBOL(__start___param) = .; \
343 *(__param) \
344 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100345 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100346 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700347 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200348 . = ALIGN((align));
349
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200350/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200351 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200352#define RODATA RO_DATA_SECTION(4096)
353#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
355#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700356 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 VMLINUX_SYMBOL(__security_initcall_start) = .; \
358 *(.security_initcall.init) \
359 VMLINUX_SYMBOL(__security_initcall_end) = .; \
360 }
361
Sam Ravnborg76647092007-05-13 00:31:33 +0200362/* .text section. Map to function alignment to avoid address changes
363 * during second ld run in second ld pass when generating System.map */
364#define TEXT_TEXT \
365 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100366 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200367 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100368 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100369 DEV_KEEP(init.text) \
370 DEV_KEEP(exit.text) \
371 CPU_KEEP(init.text) \
372 CPU_KEEP(exit.text) \
373 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100374 MEM_KEEP(exit.text) \
375 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100376
Sam Ravnborg76647092007-05-13 00:31:33 +0200377
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000378/* sched.text is aling to function alignment to secure we have same
379 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000381 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 VMLINUX_SYMBOL(__sched_text_start) = .; \
383 *(.sched.text) \
384 VMLINUX_SYMBOL(__sched_text_end) = .;
385
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000386/* spinlock.text is aling to function alignment to secure we have same
387 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000389 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 VMLINUX_SYMBOL(__lock_text_start) = .; \
391 *(.spinlock.text) \
392 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700393
394#define KPROBES_TEXT \
395 ALIGN_FUNCTION(); \
396 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
397 *(.kprobes.text) \
398 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200399
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100400#ifdef CONFIG_FUNCTION_GRAPH_TRACER
401#define IRQENTRY_TEXT \
402 ALIGN_FUNCTION(); \
403 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
404 *(.irqentry.text) \
405 VMLINUX_SYMBOL(__irqentry_text_end) = .;
406#else
407#define IRQENTRY_TEXT
408#endif
409
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100410/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200411#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100412
Sam Ravnborg7923f902009-06-14 22:10:41 +0200413#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200414 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
415 HEAD_TEXT \
416 }
417
418/*
419 * Exception table
420 */
421#define EXCEPTION_TABLE(align) \
422 . = ALIGN(align); \
423 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
424 VMLINUX_SYMBOL(__start___ex_table) = .; \
425 *(__ex_table) \
426 VMLINUX_SYMBOL(__stop___ex_table) = .; \
427 }
428
429/*
430 * Init task
431 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400432#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200433 . = ALIGN(align); \
434 .data.init_task : { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400435 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200436 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100437
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700438#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700439#define KERNEL_CTORS() . = ALIGN(8); \
440 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700441 *(.ctors) \
442 VMLINUX_SYMBOL(__ctors_end) = .;
443#else
444#define KERNEL_CTORS()
445#endif
446
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100447/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100448#define INIT_DATA \
449 *(.init.data) \
450 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100451 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100452 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700453 KERNEL_CTORS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000454 *(.init.rodata) \
John Reiser4b3b4c52009-07-27 11:23:50 -0700455 MCOUNT_REC() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000456 DEV_DISCARD(init.rodata) \
457 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500458 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100459
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100460#define INIT_TEXT \
461 *(.init.text) \
462 DEV_DISCARD(init.text) \
463 CPU_DISCARD(init.text) \
464 MEM_DISCARD(init.text)
465
466#define EXIT_DATA \
467 *(.exit.data) \
468 DEV_DISCARD(exit.data) \
469 DEV_DISCARD(exit.rodata) \
470 CPU_DISCARD(exit.data) \
471 CPU_DISCARD(exit.rodata) \
472 MEM_DISCARD(exit.data) \
473 MEM_DISCARD(exit.rodata)
474
475#define EXIT_TEXT \
476 *(.exit.text) \
477 DEV_DISCARD(exit.text) \
478 CPU_DISCARD(exit.text) \
479 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100480
Sam Ravnborg7923f902009-06-14 22:10:41 +0200481#define EXIT_CALL \
482 *(.exitcall.exit)
483
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200484/*
485 * bss (Block Started by Symbol) - uninitialized data
486 * zeroed during startup
487 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400488#define SBSS(sbss_align) \
489 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200490 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
491 *(.sbss) \
492 *(.scommon) \
493 }
494
495#define BSS(bss_align) \
496 . = ALIGN(bss_align); \
497 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200498 *(.bss.page_aligned) \
499 *(.dynbss) \
500 *(.bss) \
501 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200502 }
503
504/*
505 * DWARF debug sections.
506 * Symbols in the DWARF debugging sections are relative to
507 * the beginning of the section so we begin them at 0.
508 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200509#define DWARF_DEBUG \
510 /* DWARF 1 */ \
511 .debug 0 : { *(.debug) } \
512 .line 0 : { *(.line) } \
513 /* GNU DWARF 1 extensions */ \
514 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
515 .debug_sfnames 0 : { *(.debug_sfnames) } \
516 /* DWARF 1.1 and DWARF 2 */ \
517 .debug_aranges 0 : { *(.debug_aranges) } \
518 .debug_pubnames 0 : { *(.debug_pubnames) } \
519 /* DWARF 2 */ \
520 .debug_info 0 : { *(.debug_info \
521 .gnu.linkonce.wi.*) } \
522 .debug_abbrev 0 : { *(.debug_abbrev) } \
523 .debug_line 0 : { *(.debug_line) } \
524 .debug_frame 0 : { *(.debug_frame) } \
525 .debug_str 0 : { *(.debug_str) } \
526 .debug_loc 0 : { *(.debug_loc) } \
527 .debug_macinfo 0 : { *(.debug_macinfo) } \
528 /* SGI/MIPS DWARF 2 extensions */ \
529 .debug_weaknames 0 : { *(.debug_weaknames) } \
530 .debug_funcnames 0 : { *(.debug_funcnames) } \
531 .debug_typenames 0 : { *(.debug_typenames) } \
532 .debug_varnames 0 : { *(.debug_varnames) } \
533
534 /* Stabs debugging sections. */
535#define STABS_DEBUG \
536 .stab 0 : { *(.stab) } \
537 .stabstr 0 : { *(.stabstr) } \
538 .stab.excl 0 : { *(.stab.excl) } \
539 .stab.exclstr 0 : { *(.stab.exclstr) } \
540 .stab.index 0 : { *(.stab.index) } \
541 .stab.indexstr 0 : { *(.stab.indexstr) } \
542 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700543
Jan Beulich6360b1f2008-05-12 15:44:41 +0200544#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800545#define BUG_TABLE \
546 . = ALIGN(8); \
547 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700548 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800549 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700550 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800551 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200552#else
553#define BUG_TABLE
554#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800555
Jan Beulich63687a52008-05-12 15:44:41 +0200556#ifdef CONFIG_PM_TRACE
557#define TRACEDATA \
558 . = ALIGN(4); \
559 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700560 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200561 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700562 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200563 }
564#else
565#define TRACEDATA
566#endif
567
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700568#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700569 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
570 VMLINUX_SYMBOL(__start_notes) = .; \
571 *(.note.*) \
572 VMLINUX_SYMBOL(__stop_notes) = .; \
573 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700574
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200575#define INIT_SETUP(initsetup_align) \
576 . = ALIGN(initsetup_align); \
577 VMLINUX_SYMBOL(__setup_start) = .; \
578 *(.init.setup) \
579 VMLINUX_SYMBOL(__setup_end) = .;
580
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700581#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700582 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700583 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800584 *(.initcall0.init) \
585 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700586 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700587 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700588 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700589 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700590 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700591 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700592 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700593 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700594 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700595 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800596 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700597 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700598 *(.initcall6s.init) \
599 *(.initcall7.init) \
600 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700601
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200602#define INIT_CALLS \
603 VMLINUX_SYMBOL(__initcall_start) = .; \
604 INITCALLS \
605 VMLINUX_SYMBOL(__initcall_end) = .;
606
607#define CON_INITCALL \
608 VMLINUX_SYMBOL(__con_initcall_start) = .; \
609 *(.con_initcall.init) \
610 VMLINUX_SYMBOL(__con_initcall_end) = .;
611
612#define SECURITY_INITCALL \
613 VMLINUX_SYMBOL(__security_initcall_start) = .; \
614 *(.security_initcall.init) \
615 VMLINUX_SYMBOL(__security_initcall_end) = .;
616
617#ifdef CONFIG_BLK_DEV_INITRD
618#define INIT_RAM_FS \
619 . = ALIGN(PAGE_SIZE); \
620 VMLINUX_SYMBOL(__initramfs_start) = .; \
621 *(.init.ramfs) \
622 VMLINUX_SYMBOL(__initramfs_end) = .;
623#else
David Howellseadfe212009-06-22 15:32:31 +0100624#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200625#endif
626
Tejun Heo023bf6f2009-07-09 11:27:40 +0900627/*
628 * Default discarded sections.
629 *
630 * Some archs want to discard exit text/data at runtime rather than
631 * link time due to cross-section references such as alt instructions,
632 * bug table, eh_frame, etc. DISCARDS must be the last of output
633 * section definitions so that such archs put those in earlier section
634 * definitions.
635 */
Tejun Heo405d9672009-06-24 15:13:38 +0900636#define DISCARDS \
637 /DISCARD/ : { \
638 EXIT_TEXT \
639 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900640 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900641 *(.discard) \
642 }
643
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900644/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900645 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900646 * @vaddr: explicit base address (optional)
647 * @phdr: destination PHDR (optional)
648 *
649 * Macro which expands to output section for percpu area. If @vaddr
650 * is not blank, it specifies explicit base address and all percpu
651 * symbols will be offset from the given address. If blank, @vaddr
652 * always equals @laddr + LOAD_OFFSET.
653 *
654 * @phdr defines the output PHDR to use if not blank. Be warned that
655 * output PHDR is sticky. If @phdr is specified, the next output
656 * section in the linker script will go there too. @phdr should have
657 * a leading colon.
658 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900659 * Note that this macros defines __per_cpu_load as an absolute symbol.
660 * If there is no need to put the percpu section at a predetermined
661 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900662 */
663#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100664 VMLINUX_SYMBOL(__per_cpu_load) = .; \
665 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900666 - LOAD_OFFSET) { \
667 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Brian Gerst0bd74fa2009-01-19 12:21:27 +0900668 *(.data.percpu.first) \
Eric Dumazet63cc8c72008-05-12 15:44:40 +0200669 *(.data.percpu.page_aligned) \
Fenghua Yu5fb7dc32007-07-19 01:48:12 -0700670 *(.data.percpu) \
671 *(.data.percpu.shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900672 VMLINUX_SYMBOL(__per_cpu_end) = .; \
673 } phdr \
Ingo Molnardba3d362009-01-29 17:10:12 +0100674 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900675
676/**
677 * PERCPU - define output section for percpu area, simple version
678 * @align: required alignment
679 *
680 * Align to @align and outputs output section for percpu area. This
681 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
682 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900683 *
684 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
685 * that __per_cpu_load is defined as a relative symbol against
686 * .data.percpu which is required for relocatable x86_32
687 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900688 */
689#define PERCPU(align) \
690 . = ALIGN(align); \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900691 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
692 VMLINUX_SYMBOL(__per_cpu_load) = .; \
693 VMLINUX_SYMBOL(__per_cpu_start) = .; \
694 *(.data.percpu.first) \
695 *(.data.percpu.page_aligned) \
696 *(.data.percpu) \
697 *(.data.percpu.shared_aligned) \
698 VMLINUX_SYMBOL(__per_cpu_end) = .; \
699 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200700
701
702/*
703 * Definition of the high level *_SECTION macros
704 * They will fit only a subset of the architectures
705 */
706
707
708/*
709 * Writeable data.
710 * All sections are combined in a single .data section.
711 * The sections following CONSTRUCTORS are arranged so their
712 * typical alignment matches.
713 * A cacheline is typical/always less than a PAGE_SIZE so
714 * the sections that has this restriction (or similar)
715 * is located before the ones requiring PAGE_SIZE alignment.
716 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
717 * matches the requirment of PAGE_ALIGNED_DATA.
718 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200719 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900720#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200721 . = ALIGN(PAGE_SIZE); \
722 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400723 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400724 NOSAVE_DATA \
725 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200726 CACHELINE_ALIGNED_DATA(cacheline) \
727 READ_MOSTLY_DATA(cacheline) \
728 DATA_DATA \
729 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200730 }
731
732#define INIT_TEXT_SECTION(inittext_align) \
733 . = ALIGN(inittext_align); \
734 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
735 VMLINUX_SYMBOL(_sinittext) = .; \
736 INIT_TEXT \
737 VMLINUX_SYMBOL(_einittext) = .; \
738 }
739
740#define INIT_DATA_SECTION(initsetup_align) \
741 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
742 INIT_DATA \
743 INIT_SETUP(initsetup_align) \
744 INIT_CALLS \
745 CON_INITCALL \
746 SECURITY_INITCALL \
747 INIT_RAM_FS \
748 }
749
Tim Abbott04e448d2009-07-12 18:23:33 -0400750#define BSS_SECTION(sbss_align, bss_align, stop_align) \
751 . = ALIGN(sbss_align); \
752 VMLINUX_SYMBOL(__bss_start) = .; \
753 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200754 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400755 . = ALIGN(stop_align); \
756 VMLINUX_SYMBOL(__bss_stop) = .;