blob: fba42236e9428207a10c5c06a977da4180dbd781 [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 = .;
15 * HEAD_SECTION
16 * 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 *
33 * __bss_start = .;
34 * BSS_SECTION(0, 0)
35 * __bss_stop = .;
36 * _end = .;
37 *
38 * /DISCARD/ : {
39 * EXIT_TEXT
40 * EXIT_DATA
41 * *(.exitcall.exit)
42 * }
43 * STABS_DEBUG
44 * DWARF_DEBUG
45 * }
46 *
47 * [__init_begin, __init_end] is the init section that may be freed after init
48 * [_stext, _etext] is the text section
49 * [_sdata, _edata] is the data section
50 *
51 * Some of the included output section have their own set of constants.
52 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
53 * [__nosave_begin, __nosave_end] for the nosave data
54 */
55 #include <linux/section-names.h>
Tim Abbottc80d4712009-04-25 22:10:56 -040056
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#ifndef LOAD_OFFSET
58#define LOAD_OFFSET 0
59#endif
60
61#ifndef VMLINUX_SYMBOL
62#define VMLINUX_SYMBOL(_sym_) _sym_
63#endif
64
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +000065/* Align . to a 8 byte boundary equals to maximum function alignment. */
66#define ALIGN_FUNCTION() . = ALIGN(8)
67
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010068/* The actual configuration determine if the init/exit sections
69 * are handled as text/data or they can be discarded (which
70 * often happens at runtime)
71 */
72#ifdef CONFIG_HOTPLUG
73#define DEV_KEEP(sec) *(.dev##sec)
74#define DEV_DISCARD(sec)
75#else
76#define DEV_KEEP(sec)
77#define DEV_DISCARD(sec) *(.dev##sec)
78#endif
79
80#ifdef CONFIG_HOTPLUG_CPU
81#define CPU_KEEP(sec) *(.cpu##sec)
82#define CPU_DISCARD(sec)
83#else
84#define CPU_KEEP(sec)
85#define CPU_DISCARD(sec) *(.cpu##sec)
86#endif
87
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010088#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010089#define MEM_KEEP(sec) *(.mem##sec)
90#define MEM_DISCARD(sec)
91#else
92#define MEM_KEEP(sec)
93#define MEM_DISCARD(sec) *(.mem##sec)
94#endif
95
Steven Rostedt8da38212008-08-14 15:45:07 -040096#ifdef CONFIG_FTRACE_MCOUNT_RECORD
97#define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
98 *(__mcount_loc) \
99 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
100#else
101#define MCOUNT_REC()
102#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100103
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500104#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500105#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
106 *(_ftrace_annotated_branch) \
107 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500108#else
109#define LIKELY_PROFILE()
110#endif
111
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500112#ifdef CONFIG_PROFILE_ALL_BRANCHES
113#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
114 *(_ftrace_branch) \
115 VMLINUX_SYMBOL(__stop_branch_profile) = .;
116#else
117#define BRANCH_PROFILE()
118#endif
119
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500120#ifdef CONFIG_EVENT_TRACER
121#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
122 *(_ftrace_events) \
123 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
124#else
125#define FTRACE_EVENTS()
126#endif
127
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100128#ifdef CONFIG_TRACING
129#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
130 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
131 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
132#else
133#define TRACE_PRINTKS()
134#endif
135
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100136#ifdef CONFIG_FTRACE_SYSCALLS
137#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
138 *(__syscalls_metadata) \
139 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
140#else
141#define TRACE_SYSCALLS()
142#endif
143
Sam Ravnborgca967252007-05-17 13:38:44 +0200144/* .data section */
145#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200146 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100147 *(.ref.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100148 DEV_KEEP(init.data) \
149 DEV_KEEP(exit.data) \
150 CPU_KEEP(init.data) \
151 CPU_KEEP(exit.data) \
152 MEM_KEEP(init.data) \
153 MEM_KEEP(exit.data) \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700154 . = ALIGN(8); \
155 VMLINUX_SYMBOL(__start___markers) = .; \
156 *(__markers) \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400157 VMLINUX_SYMBOL(__stop___markers) = .; \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500158 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400159 VMLINUX_SYMBOL(__start___tracepoints) = .; \
160 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500161 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500162 /* implement dynamic printk debug */ \
163 . = ALIGN(8); \
164 VMLINUX_SYMBOL(__start___verbose) = .; \
165 *(__verbose) \
166 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500167 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500168 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100169 TRACE_PRINTKS() \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100170 FTRACE_EVENTS() \
171 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200172
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200173/*
174 * Data section helpers
175 */
176#define NOSAVE_DATA \
177 . = ALIGN(PAGE_SIZE); \
178 VMLINUX_SYMBOL(__nosave_begin) = .; \
179 *(.data.nosave) \
180 . = ALIGN(PAGE_SIZE); \
181 VMLINUX_SYMBOL(__nosave_end) = .;
182
183#define PAGE_ALIGNED_DATA(page_align) \
184 . = ALIGN(page_align); \
185 *(.data.page_aligned)
186
187#define READ_MOSTLY_DATA(align) \
188 . = ALIGN(align); \
189 *(.data.read_mostly)
190
191#define CACHELINE_ALIGNED_DATA(align) \
192 . = ALIGN(align); \
193 *(.data.cacheline_aligned)
194
195#define INIT_TASK(align) \
196 . = ALIGN(align); \
197 *(.data.init_task)
198
199/*
200 * Read only Data
201 */
202#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200203 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100205 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 *(.rodata) *(.rodata.*) \
207 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700208 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400209 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 } \
211 \
212 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
213 *(.rodata1) \
214 } \
215 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200216 BUG_TABLE \
217 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 /* PCI quirks */ \
219 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
220 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
221 *(.pci_fixup_early) \
222 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
223 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
224 *(.pci_fixup_header) \
225 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
226 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
227 *(.pci_fixup_final) \
228 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
229 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
230 *(.pci_fixup_enable) \
231 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800232 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
233 *(.pci_fixup_resume) \
234 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200235 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
236 *(.pci_fixup_resume_early) \
237 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
238 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
239 *(.pci_fixup_suspend) \
240 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 } \
242 \
David Woodhouse5658c762008-05-23 13:52:42 +0100243 /* Built-in firmware blobs */ \
244 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
245 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
246 *(.builtin_fw) \
247 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
248 } \
249 \
Matt Porter394b7012005-11-07 01:00:15 -0800250 /* RapidIO route ops */ \
251 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
252 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
253 *(.rio_route_ops) \
254 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
255 } \
256 \
Jan Beulich63687a52008-05-12 15:44:41 +0200257 TRACEDATA \
258 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 /* Kernel symbol table: Normal symbols */ \
260 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
261 VMLINUX_SYMBOL(__start___ksymtab) = .; \
262 *(__ksymtab) \
263 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
264 } \
265 \
266 /* Kernel symbol table: GPL-only symbols */ \
267 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
268 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
269 *(__ksymtab_gpl) \
270 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
271 } \
272 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700273 /* Kernel symbol table: Normal unused symbols */ \
274 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
275 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
276 *(__ksymtab_unused) \
277 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
278 } \
279 \
280 /* Kernel symbol table: GPL-only unused symbols */ \
281 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
282 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
283 *(__ksymtab_unused_gpl) \
284 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
285 } \
286 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800287 /* Kernel symbol table: GPL-future-only symbols */ \
288 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
289 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
290 *(__ksymtab_gpl_future) \
291 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
292 } \
293 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 /* Kernel symbol table: Normal symbols */ \
295 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
296 VMLINUX_SYMBOL(__start___kcrctab) = .; \
297 *(__kcrctab) \
298 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
299 } \
300 \
301 /* Kernel symbol table: GPL-only symbols */ \
302 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
303 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
304 *(__kcrctab_gpl) \
305 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
306 } \
307 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700308 /* Kernel symbol table: Normal unused symbols */ \
309 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
310 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
311 *(__kcrctab_unused) \
312 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
313 } \
314 \
315 /* Kernel symbol table: GPL-only unused symbols */ \
316 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
317 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
318 *(__kcrctab_unused_gpl) \
319 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
320 } \
321 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800322 /* Kernel symbol table: GPL-future-only symbols */ \
323 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
324 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
325 *(__kcrctab_gpl_future) \
326 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
327 } \
328 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 /* Kernel symbol table: strings */ \
330 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
331 *(__ksymtab_strings) \
332 } \
333 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100334 /* __*init sections */ \
335 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100336 *(.ref.rodata) \
Steven Rostedt8da38212008-08-14 15:45:07 -0400337 MCOUNT_REC() \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100338 DEV_KEEP(init.rodata) \
339 DEV_KEEP(exit.rodata) \
340 CPU_KEEP(init.rodata) \
341 CPU_KEEP(exit.rodata) \
342 MEM_KEEP(init.rodata) \
343 MEM_KEEP(exit.rodata) \
344 } \
345 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 /* Built-in module parameters. */ \
347 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
348 VMLINUX_SYMBOL(__start___param) = .; \
349 *(__param) \
350 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100351 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100352 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700353 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200354 . = ALIGN((align));
355
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200356/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200357 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200358#define RODATA RO_DATA_SECTION(4096)
359#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700362 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 VMLINUX_SYMBOL(__security_initcall_start) = .; \
364 *(.security_initcall.init) \
365 VMLINUX_SYMBOL(__security_initcall_end) = .; \
366 }
367
Sam Ravnborg76647092007-05-13 00:31:33 +0200368/* .text section. Map to function alignment to avoid address changes
369 * during second ld run in second ld pass when generating System.map */
370#define TEXT_TEXT \
371 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100372 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200373 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100374 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100375 DEV_KEEP(init.text) \
376 DEV_KEEP(exit.text) \
377 CPU_KEEP(init.text) \
378 CPU_KEEP(exit.text) \
379 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100380 MEM_KEEP(exit.text) \
381 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100382
Sam Ravnborg76647092007-05-13 00:31:33 +0200383
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000384/* sched.text is aling to function alignment to secure we have same
385 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000387 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 VMLINUX_SYMBOL(__sched_text_start) = .; \
389 *(.sched.text) \
390 VMLINUX_SYMBOL(__sched_text_end) = .;
391
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000392/* spinlock.text is aling to function alignment to secure we have same
393 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000395 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 VMLINUX_SYMBOL(__lock_text_start) = .; \
397 *(.spinlock.text) \
398 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700399
400#define KPROBES_TEXT \
401 ALIGN_FUNCTION(); \
402 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
403 *(.kprobes.text) \
404 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200405
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100406#ifdef CONFIG_FUNCTION_GRAPH_TRACER
407#define IRQENTRY_TEXT \
408 ALIGN_FUNCTION(); \
409 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
410 *(.irqentry.text) \
411 VMLINUX_SYMBOL(__irqentry_text_end) = .;
412#else
413#define IRQENTRY_TEXT
414#endif
415
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100416/* Section used for early init (in .S files) */
Tim Abbottc80d4712009-04-25 22:10:56 -0400417#define HEAD_TEXT *(HEAD_TEXT_SECTION)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100418
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200419#define HEAD_SECTION \
420 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
421 HEAD_TEXT \
422 }
423
424/*
425 * Exception table
426 */
427#define EXCEPTION_TABLE(align) \
428 . = ALIGN(align); \
429 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
430 VMLINUX_SYMBOL(__start___ex_table) = .; \
431 *(__ex_table) \
432 VMLINUX_SYMBOL(__stop___ex_table) = .; \
433 }
434
435/*
436 * Init task
437 */
438#define INIT_TASK_DATA(align) \
439 . = ALIGN(align); \
440 .data.init_task : { \
441 INIT_TASK \
442 }
443
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100444/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100445#define INIT_DATA \
446 *(.init.data) \
447 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100448 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100449 MEM_DISCARD(init.data) \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000450 *(.init.rodata) \
451 DEV_DISCARD(init.rodata) \
452 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500453 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100454
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100455#define INIT_TEXT \
456 *(.init.text) \
457 DEV_DISCARD(init.text) \
458 CPU_DISCARD(init.text) \
459 MEM_DISCARD(init.text)
460
461#define EXIT_DATA \
462 *(.exit.data) \
463 DEV_DISCARD(exit.data) \
464 DEV_DISCARD(exit.rodata) \
465 CPU_DISCARD(exit.data) \
466 CPU_DISCARD(exit.rodata) \
467 MEM_DISCARD(exit.data) \
468 MEM_DISCARD(exit.rodata)
469
470#define EXIT_TEXT \
471 *(.exit.text) \
472 DEV_DISCARD(exit.text) \
473 CPU_DISCARD(exit.text) \
474 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100475
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200476/*
477 * bss (Block Started by Symbol) - uninitialized data
478 * zeroed during startup
479 */
480#define SBSS \
481 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
482 *(.sbss) \
483 *(.scommon) \
484 }
485
486#define BSS(bss_align) \
487 . = ALIGN(bss_align); \
488 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
489 VMLINUX_SYMBOL(__bss_start) = .; \
490 *(.bss.page_aligned) \
491 *(.dynbss) \
492 *(.bss) \
493 *(COMMON) \
494 VMLINUX_SYMBOL(__bss_stop) = .; \
495 }
496
497/*
498 * DWARF debug sections.
499 * Symbols in the DWARF debugging sections are relative to
500 * the beginning of the section so we begin them at 0.
501 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200502#define DWARF_DEBUG \
503 /* DWARF 1 */ \
504 .debug 0 : { *(.debug) } \
505 .line 0 : { *(.line) } \
506 /* GNU DWARF 1 extensions */ \
507 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
508 .debug_sfnames 0 : { *(.debug_sfnames) } \
509 /* DWARF 1.1 and DWARF 2 */ \
510 .debug_aranges 0 : { *(.debug_aranges) } \
511 .debug_pubnames 0 : { *(.debug_pubnames) } \
512 /* DWARF 2 */ \
513 .debug_info 0 : { *(.debug_info \
514 .gnu.linkonce.wi.*) } \
515 .debug_abbrev 0 : { *(.debug_abbrev) } \
516 .debug_line 0 : { *(.debug_line) } \
517 .debug_frame 0 : { *(.debug_frame) } \
518 .debug_str 0 : { *(.debug_str) } \
519 .debug_loc 0 : { *(.debug_loc) } \
520 .debug_macinfo 0 : { *(.debug_macinfo) } \
521 /* SGI/MIPS DWARF 2 extensions */ \
522 .debug_weaknames 0 : { *(.debug_weaknames) } \
523 .debug_funcnames 0 : { *(.debug_funcnames) } \
524 .debug_typenames 0 : { *(.debug_typenames) } \
525 .debug_varnames 0 : { *(.debug_varnames) } \
526
527 /* Stabs debugging sections. */
528#define STABS_DEBUG \
529 .stab 0 : { *(.stab) } \
530 .stabstr 0 : { *(.stabstr) } \
531 .stab.excl 0 : { *(.stab.excl) } \
532 .stab.exclstr 0 : { *(.stab.exclstr) } \
533 .stab.index 0 : { *(.stab.index) } \
534 .stab.indexstr 0 : { *(.stab.indexstr) } \
535 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700536
Jan Beulich6360b1f2008-05-12 15:44:41 +0200537#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800538#define BUG_TABLE \
539 . = ALIGN(8); \
540 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700541 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800542 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700543 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800544 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200545#else
546#define BUG_TABLE
547#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800548
Jan Beulich63687a52008-05-12 15:44:41 +0200549#ifdef CONFIG_PM_TRACE
550#define TRACEDATA \
551 . = ALIGN(4); \
552 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700553 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200554 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700555 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200556 }
557#else
558#define TRACEDATA
559#endif
560
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700561#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700562 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
563 VMLINUX_SYMBOL(__start_notes) = .; \
564 *(.note.*) \
565 VMLINUX_SYMBOL(__stop_notes) = .; \
566 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700567
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200568#define INIT_SETUP(initsetup_align) \
569 . = ALIGN(initsetup_align); \
570 VMLINUX_SYMBOL(__setup_start) = .; \
571 *(.init.setup) \
572 VMLINUX_SYMBOL(__setup_end) = .;
573
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700574#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700575 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700576 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800577 *(.initcall0.init) \
578 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700579 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700580 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700581 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700582 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700583 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700584 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700585 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700586 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700587 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700588 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800589 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700590 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700591 *(.initcall6s.init) \
592 *(.initcall7.init) \
593 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700594
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200595#define INIT_CALLS \
596 VMLINUX_SYMBOL(__initcall_start) = .; \
597 INITCALLS \
598 VMLINUX_SYMBOL(__initcall_end) = .;
599
600#define CON_INITCALL \
601 VMLINUX_SYMBOL(__con_initcall_start) = .; \
602 *(.con_initcall.init) \
603 VMLINUX_SYMBOL(__con_initcall_end) = .;
604
605#define SECURITY_INITCALL \
606 VMLINUX_SYMBOL(__security_initcall_start) = .; \
607 *(.security_initcall.init) \
608 VMLINUX_SYMBOL(__security_initcall_end) = .;
609
610#ifdef CONFIG_BLK_DEV_INITRD
611#define INIT_RAM_FS \
612 . = ALIGN(PAGE_SIZE); \
613 VMLINUX_SYMBOL(__initramfs_start) = .; \
614 *(.init.ramfs) \
615 VMLINUX_SYMBOL(__initramfs_end) = .;
616#else
617#define INITRAMFS
618#endif
619
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900620/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900621 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900622 * @vaddr: explicit base address (optional)
623 * @phdr: destination PHDR (optional)
624 *
625 * Macro which expands to output section for percpu area. If @vaddr
626 * is not blank, it specifies explicit base address and all percpu
627 * symbols will be offset from the given address. If blank, @vaddr
628 * always equals @laddr + LOAD_OFFSET.
629 *
630 * @phdr defines the output PHDR to use if not blank. Be warned that
631 * output PHDR is sticky. If @phdr is specified, the next output
632 * section in the linker script will go there too. @phdr should have
633 * a leading colon.
634 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900635 * Note that this macros defines __per_cpu_load as an absolute symbol.
636 * If there is no need to put the percpu section at a predetermined
637 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900638 */
639#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100640 VMLINUX_SYMBOL(__per_cpu_load) = .; \
641 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900642 - LOAD_OFFSET) { \
643 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Brian Gerst0bd74fa2009-01-19 12:21:27 +0900644 *(.data.percpu.first) \
Eric Dumazet63cc8c72008-05-12 15:44:40 +0200645 *(.data.percpu.page_aligned) \
Fenghua Yu5fb7dc32007-07-19 01:48:12 -0700646 *(.data.percpu) \
647 *(.data.percpu.shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900648 VMLINUX_SYMBOL(__per_cpu_end) = .; \
649 } phdr \
Ingo Molnardba3d362009-01-29 17:10:12 +0100650 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900651
652/**
653 * PERCPU - define output section for percpu area, simple version
654 * @align: required alignment
655 *
656 * Align to @align and outputs output section for percpu area. This
657 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
658 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900659 *
660 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
661 * that __per_cpu_load is defined as a relative symbol against
662 * .data.percpu which is required for relocatable x86_32
663 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900664 */
665#define PERCPU(align) \
666 . = ALIGN(align); \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900667 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
668 VMLINUX_SYMBOL(__per_cpu_load) = .; \
669 VMLINUX_SYMBOL(__per_cpu_start) = .; \
670 *(.data.percpu.first) \
671 *(.data.percpu.page_aligned) \
672 *(.data.percpu) \
673 *(.data.percpu.shared_aligned) \
674 VMLINUX_SYMBOL(__per_cpu_end) = .; \
675 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200676
677
678/*
679 * Definition of the high level *_SECTION macros
680 * They will fit only a subset of the architectures
681 */
682
683
684/*
685 * Writeable data.
686 * All sections are combined in a single .data section.
687 * The sections following CONSTRUCTORS are arranged so their
688 * typical alignment matches.
689 * A cacheline is typical/always less than a PAGE_SIZE so
690 * the sections that has this restriction (or similar)
691 * is located before the ones requiring PAGE_SIZE alignment.
692 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
693 * matches the requirment of PAGE_ALIGNED_DATA.
694 *
695/* use 0 as page_align if page_aligned data is not used */
696#define RW_DATA_SECTION(cacheline, nosave, pagealigned, inittask) \
697 . = ALIGN(PAGE_SIZE); \
698 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
699 INIT_TASK(inittask) \
700 CACHELINE_ALIGNED_DATA(cacheline) \
701 READ_MOSTLY_DATA(cacheline) \
702 DATA_DATA \
703 CONSTRUCTORS \
704 NOSAVE_DATA(nosave) \
705 PAGE_ALIGNED_DATA(pagealigned) \
706 }
707
708#define INIT_TEXT_SECTION(inittext_align) \
709 . = ALIGN(inittext_align); \
710 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
711 VMLINUX_SYMBOL(_sinittext) = .; \
712 INIT_TEXT \
713 VMLINUX_SYMBOL(_einittext) = .; \
714 }
715
716#define INIT_DATA_SECTION(initsetup_align) \
717 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
718 INIT_DATA \
719 INIT_SETUP(initsetup_align) \
720 INIT_CALLS \
721 CON_INITCALL \
722 SECURITY_INITCALL \
723 INIT_RAM_FS \
724 }
725
726#define BSS_SECTION(sbss_align, bss_align) \
727 SBSS \
728 BSS(bss_align) \
729 . = ALIGN(4); \