blob: 7381f701f3f3304c9334fc4c16afe0412550e07e [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 *
33 * __bss_start = .;
34 * BSS_SECTION(0, 0)
35 * __bss_stop = .;
36 * _end = .;
37 *
38 * /DISCARD/ : {
39 * EXIT_TEXT
40 * EXIT_DATA
Sam Ravnborg7923f902009-06-14 22:10:41 +020041 * EXIT_CALL
Sam Ravnborgef53dae2009-06-07 20:46:37 +020042 * }
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 */
Tim Abbottc80d4712009-04-25 22:10:56 -040055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#ifndef LOAD_OFFSET
57#define LOAD_OFFSET 0
58#endif
59
60#ifndef VMLINUX_SYMBOL
61#define VMLINUX_SYMBOL(_sym_) _sym_
62#endif
63
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +000064/* Align . to a 8 byte boundary equals to maximum function alignment. */
65#define ALIGN_FUNCTION() . = ALIGN(8)
66
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010067/* The actual configuration determine if the init/exit sections
68 * are handled as text/data or they can be discarded (which
69 * often happens at runtime)
70 */
71#ifdef CONFIG_HOTPLUG
72#define DEV_KEEP(sec) *(.dev##sec)
73#define DEV_DISCARD(sec)
74#else
75#define DEV_KEEP(sec)
76#define DEV_DISCARD(sec) *(.dev##sec)
77#endif
78
79#ifdef CONFIG_HOTPLUG_CPU
80#define CPU_KEEP(sec) *(.cpu##sec)
81#define CPU_DISCARD(sec)
82#else
83#define CPU_KEEP(sec)
84#define CPU_DISCARD(sec) *(.cpu##sec)
85#endif
86
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010087#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010088#define MEM_KEEP(sec) *(.mem##sec)
89#define MEM_DISCARD(sec)
90#else
91#define MEM_KEEP(sec)
92#define MEM_DISCARD(sec) *(.mem##sec)
93#endif
94
Steven Rostedt8da38212008-08-14 15:45:07 -040095#ifdef CONFIG_FTRACE_MCOUNT_RECORD
96#define MCOUNT_REC() VMLINUX_SYMBOL(__start_mcount_loc) = .; \
97 *(__mcount_loc) \
98 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
99#else
100#define MCOUNT_REC()
101#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100102
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500103#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500104#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
105 *(_ftrace_annotated_branch) \
106 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500107#else
108#define LIKELY_PROFILE()
109#endif
110
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500111#ifdef CONFIG_PROFILE_ALL_BRANCHES
112#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
113 *(_ftrace_branch) \
114 VMLINUX_SYMBOL(__stop_branch_profile) = .;
115#else
116#define BRANCH_PROFILE()
117#endif
118
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500119#ifdef CONFIG_EVENT_TRACER
120#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
121 *(_ftrace_events) \
122 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
123#else
124#define FTRACE_EVENTS()
125#endif
126
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100127#ifdef CONFIG_TRACING
128#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
129 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
130 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
131#else
132#define TRACE_PRINTKS()
133#endif
134
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100135#ifdef CONFIG_FTRACE_SYSCALLS
136#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
137 *(__syscalls_metadata) \
138 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
139#else
140#define TRACE_SYSCALLS()
141#endif
142
Sam Ravnborgca967252007-05-17 13:38:44 +0200143/* .data section */
144#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200145 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100146 *(.ref.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100147 DEV_KEEP(init.data) \
148 DEV_KEEP(exit.data) \
149 CPU_KEEP(init.data) \
150 CPU_KEEP(exit.data) \
151 MEM_KEEP(init.data) \
152 MEM_KEEP(exit.data) \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700153 . = ALIGN(8); \
154 VMLINUX_SYMBOL(__start___markers) = .; \
155 *(__markers) \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400156 VMLINUX_SYMBOL(__stop___markers) = .; \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500157 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400158 VMLINUX_SYMBOL(__start___tracepoints) = .; \
159 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500160 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500161 /* implement dynamic printk debug */ \
162 . = ALIGN(8); \
163 VMLINUX_SYMBOL(__start___verbose) = .; \
164 *(__verbose) \
165 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500166 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500167 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100168 TRACE_PRINTKS() \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100169 FTRACE_EVENTS() \
170 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200171
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200172/*
173 * Data section helpers
174 */
175#define NOSAVE_DATA \
176 . = ALIGN(PAGE_SIZE); \
177 VMLINUX_SYMBOL(__nosave_begin) = .; \
178 *(.data.nosave) \
179 . = ALIGN(PAGE_SIZE); \
180 VMLINUX_SYMBOL(__nosave_end) = .;
181
182#define PAGE_ALIGNED_DATA(page_align) \
183 . = ALIGN(page_align); \
184 *(.data.page_aligned)
185
186#define READ_MOSTLY_DATA(align) \
187 . = ALIGN(align); \
188 *(.data.read_mostly)
189
190#define CACHELINE_ALIGNED_DATA(align) \
191 . = ALIGN(align); \
192 *(.data.cacheline_aligned)
193
194#define INIT_TASK(align) \
195 . = ALIGN(align); \
196 *(.data.init_task)
197
198/*
199 * Read only Data
200 */
201#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200202 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100204 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 *(.rodata) *(.rodata.*) \
206 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700207 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400208 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 } \
210 \
211 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
212 *(.rodata1) \
213 } \
214 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200215 BUG_TABLE \
216 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 /* PCI quirks */ \
218 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
219 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
220 *(.pci_fixup_early) \
221 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
222 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
223 *(.pci_fixup_header) \
224 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
225 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
226 *(.pci_fixup_final) \
227 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
228 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
229 *(.pci_fixup_enable) \
230 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800231 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
232 *(.pci_fixup_resume) \
233 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200234 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
235 *(.pci_fixup_resume_early) \
236 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
237 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
238 *(.pci_fixup_suspend) \
239 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 } \
241 \
David Woodhouse5658c762008-05-23 13:52:42 +0100242 /* Built-in firmware blobs */ \
243 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
244 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
245 *(.builtin_fw) \
246 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
247 } \
248 \
Matt Porter394b7012005-11-07 01:00:15 -0800249 /* RapidIO route ops */ \
250 .rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
251 VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
252 *(.rio_route_ops) \
253 VMLINUX_SYMBOL(__end_rio_route_ops) = .; \
254 } \
255 \
Jan Beulich63687a52008-05-12 15:44:41 +0200256 TRACEDATA \
257 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 /* Kernel symbol table: Normal symbols */ \
259 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
260 VMLINUX_SYMBOL(__start___ksymtab) = .; \
261 *(__ksymtab) \
262 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
263 } \
264 \
265 /* Kernel symbol table: GPL-only symbols */ \
266 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
267 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
268 *(__ksymtab_gpl) \
269 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
270 } \
271 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700272 /* Kernel symbol table: Normal unused symbols */ \
273 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
274 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
275 *(__ksymtab_unused) \
276 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
277 } \
278 \
279 /* Kernel symbol table: GPL-only unused symbols */ \
280 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
281 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
282 *(__ksymtab_unused_gpl) \
283 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
284 } \
285 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800286 /* Kernel symbol table: GPL-future-only symbols */ \
287 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
288 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
289 *(__ksymtab_gpl_future) \
290 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
291 } \
292 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 /* Kernel symbol table: Normal symbols */ \
294 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
295 VMLINUX_SYMBOL(__start___kcrctab) = .; \
296 *(__kcrctab) \
297 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
298 } \
299 \
300 /* Kernel symbol table: GPL-only symbols */ \
301 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
302 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
303 *(__kcrctab_gpl) \
304 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
305 } \
306 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700307 /* Kernel symbol table: Normal unused symbols */ \
308 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
309 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
310 *(__kcrctab_unused) \
311 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
312 } \
313 \
314 /* Kernel symbol table: GPL-only unused symbols */ \
315 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
316 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
317 *(__kcrctab_unused_gpl) \
318 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
319 } \
320 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800321 /* Kernel symbol table: GPL-future-only symbols */ \
322 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
323 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
324 *(__kcrctab_gpl_future) \
325 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
326 } \
327 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 /* Kernel symbol table: strings */ \
329 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
330 *(__ksymtab_strings) \
331 } \
332 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100333 /* __*init sections */ \
334 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100335 *(.ref.rodata) \
Steven Rostedt8da38212008-08-14 15:45:07 -0400336 MCOUNT_REC() \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100337 DEV_KEEP(init.rodata) \
338 DEV_KEEP(exit.rodata) \
339 CPU_KEEP(init.rodata) \
340 CPU_KEEP(exit.rodata) \
341 MEM_KEEP(init.rodata) \
342 MEM_KEEP(exit.rodata) \
343 } \
344 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 /* Built-in module parameters. */ \
346 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
347 VMLINUX_SYMBOL(__start___param) = .; \
348 *(__param) \
349 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100350 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100351 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700352 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200353 . = ALIGN((align));
354
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200355/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200356 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200357#define RODATA RO_DATA_SECTION(4096)
358#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700361 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 VMLINUX_SYMBOL(__security_initcall_start) = .; \
363 *(.security_initcall.init) \
364 VMLINUX_SYMBOL(__security_initcall_end) = .; \
365 }
366
Sam Ravnborg76647092007-05-13 00:31:33 +0200367/* .text section. Map to function alignment to avoid address changes
368 * during second ld run in second ld pass when generating System.map */
369#define TEXT_TEXT \
370 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100371 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200372 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100373 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100374 DEV_KEEP(init.text) \
375 DEV_KEEP(exit.text) \
376 CPU_KEEP(init.text) \
377 CPU_KEEP(exit.text) \
378 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100379 MEM_KEEP(exit.text) \
380 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100381
Sam Ravnborg76647092007-05-13 00:31:33 +0200382
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000383/* sched.text is aling to function alignment to secure we have same
384 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000386 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 VMLINUX_SYMBOL(__sched_text_start) = .; \
388 *(.sched.text) \
389 VMLINUX_SYMBOL(__sched_text_end) = .;
390
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000391/* spinlock.text is aling to function alignment to secure we have same
392 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000394 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 VMLINUX_SYMBOL(__lock_text_start) = .; \
396 *(.spinlock.text) \
397 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700398
399#define KPROBES_TEXT \
400 ALIGN_FUNCTION(); \
401 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
402 *(.kprobes.text) \
403 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200404
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100405#ifdef CONFIG_FUNCTION_GRAPH_TRACER
406#define IRQENTRY_TEXT \
407 ALIGN_FUNCTION(); \
408 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
409 *(.irqentry.text) \
410 VMLINUX_SYMBOL(__irqentry_text_end) = .;
411#else
412#define IRQENTRY_TEXT
413#endif
414
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100415/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200416#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100417
Sam Ravnborg7923f902009-06-14 22:10:41 +0200418#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200419 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
420 HEAD_TEXT \
421 }
422
423/*
424 * Exception table
425 */
426#define EXCEPTION_TABLE(align) \
427 . = ALIGN(align); \
428 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
429 VMLINUX_SYMBOL(__start___ex_table) = .; \
430 *(__ex_table) \
431 VMLINUX_SYMBOL(__stop___ex_table) = .; \
432 }
433
434/*
435 * Init task
436 */
437#define INIT_TASK_DATA(align) \
438 . = ALIGN(align); \
439 .data.init_task : { \
440 INIT_TASK \
441 }
442
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100443/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100444#define INIT_DATA \
445 *(.init.data) \
446 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100447 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100448 MEM_DISCARD(init.data) \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000449 *(.init.rodata) \
450 DEV_DISCARD(init.rodata) \
451 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500452 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100453
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100454#define INIT_TEXT \
455 *(.init.text) \
456 DEV_DISCARD(init.text) \
457 CPU_DISCARD(init.text) \
458 MEM_DISCARD(init.text)
459
460#define EXIT_DATA \
461 *(.exit.data) \
462 DEV_DISCARD(exit.data) \
463 DEV_DISCARD(exit.rodata) \
464 CPU_DISCARD(exit.data) \
465 CPU_DISCARD(exit.rodata) \
466 MEM_DISCARD(exit.data) \
467 MEM_DISCARD(exit.rodata)
468
469#define EXIT_TEXT \
470 *(.exit.text) \
471 DEV_DISCARD(exit.text) \
472 CPU_DISCARD(exit.text) \
473 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100474
Sam Ravnborg7923f902009-06-14 22:10:41 +0200475#define EXIT_CALL \
476 *(.exitcall.exit)
477
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200478/*
479 * bss (Block Started by Symbol) - uninitialized data
480 * zeroed during startup
481 */
482#define SBSS \
483 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
484 *(.sbss) \
485 *(.scommon) \
486 }
487
488#define BSS(bss_align) \
489 . = ALIGN(bss_align); \
490 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
491 VMLINUX_SYMBOL(__bss_start) = .; \
492 *(.bss.page_aligned) \
493 *(.dynbss) \
494 *(.bss) \
495 *(COMMON) \
496 VMLINUX_SYMBOL(__bss_stop) = .; \
497 }
498
499/*
500 * DWARF debug sections.
501 * Symbols in the DWARF debugging sections are relative to
502 * the beginning of the section so we begin them at 0.
503 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200504#define DWARF_DEBUG \
505 /* DWARF 1 */ \
506 .debug 0 : { *(.debug) } \
507 .line 0 : { *(.line) } \
508 /* GNU DWARF 1 extensions */ \
509 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
510 .debug_sfnames 0 : { *(.debug_sfnames) } \
511 /* DWARF 1.1 and DWARF 2 */ \
512 .debug_aranges 0 : { *(.debug_aranges) } \
513 .debug_pubnames 0 : { *(.debug_pubnames) } \
514 /* DWARF 2 */ \
515 .debug_info 0 : { *(.debug_info \
516 .gnu.linkonce.wi.*) } \
517 .debug_abbrev 0 : { *(.debug_abbrev) } \
518 .debug_line 0 : { *(.debug_line) } \
519 .debug_frame 0 : { *(.debug_frame) } \
520 .debug_str 0 : { *(.debug_str) } \
521 .debug_loc 0 : { *(.debug_loc) } \
522 .debug_macinfo 0 : { *(.debug_macinfo) } \
523 /* SGI/MIPS DWARF 2 extensions */ \
524 .debug_weaknames 0 : { *(.debug_weaknames) } \
525 .debug_funcnames 0 : { *(.debug_funcnames) } \
526 .debug_typenames 0 : { *(.debug_typenames) } \
527 .debug_varnames 0 : { *(.debug_varnames) } \
528
529 /* Stabs debugging sections. */
530#define STABS_DEBUG \
531 .stab 0 : { *(.stab) } \
532 .stabstr 0 : { *(.stabstr) } \
533 .stab.excl 0 : { *(.stab.excl) } \
534 .stab.exclstr 0 : { *(.stab.exclstr) } \
535 .stab.index 0 : { *(.stab.index) } \
536 .stab.indexstr 0 : { *(.stab.indexstr) } \
537 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700538
Jan Beulich6360b1f2008-05-12 15:44:41 +0200539#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800540#define BUG_TABLE \
541 . = ALIGN(8); \
542 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700543 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800544 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700545 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800546 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200547#else
548#define BUG_TABLE
549#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800550
Jan Beulich63687a52008-05-12 15:44:41 +0200551#ifdef CONFIG_PM_TRACE
552#define TRACEDATA \
553 . = ALIGN(4); \
554 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700555 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200556 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700557 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200558 }
559#else
560#define TRACEDATA
561#endif
562
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700563#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700564 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
565 VMLINUX_SYMBOL(__start_notes) = .; \
566 *(.note.*) \
567 VMLINUX_SYMBOL(__stop_notes) = .; \
568 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700569
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200570#define INIT_SETUP(initsetup_align) \
571 . = ALIGN(initsetup_align); \
572 VMLINUX_SYMBOL(__setup_start) = .; \
573 *(.init.setup) \
574 VMLINUX_SYMBOL(__setup_end) = .;
575
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700576#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700577 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700578 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800579 *(.initcall0.init) \
580 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700581 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700582 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700583 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700584 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700585 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700586 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700587 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700588 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700589 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700590 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800591 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700592 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700593 *(.initcall6s.init) \
594 *(.initcall7.init) \
595 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700596
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200597#define INIT_CALLS \
598 VMLINUX_SYMBOL(__initcall_start) = .; \
599 INITCALLS \
600 VMLINUX_SYMBOL(__initcall_end) = .;
601
602#define CON_INITCALL \
603 VMLINUX_SYMBOL(__con_initcall_start) = .; \
604 *(.con_initcall.init) \
605 VMLINUX_SYMBOL(__con_initcall_end) = .;
606
607#define SECURITY_INITCALL \
608 VMLINUX_SYMBOL(__security_initcall_start) = .; \
609 *(.security_initcall.init) \
610 VMLINUX_SYMBOL(__security_initcall_end) = .;
611
612#ifdef CONFIG_BLK_DEV_INITRD
613#define INIT_RAM_FS \
614 . = ALIGN(PAGE_SIZE); \
615 VMLINUX_SYMBOL(__initramfs_start) = .; \
616 *(.init.ramfs) \
617 VMLINUX_SYMBOL(__initramfs_end) = .;
618#else
619#define INITRAMFS
620#endif
621
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900622/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900623 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900624 * @vaddr: explicit base address (optional)
625 * @phdr: destination PHDR (optional)
626 *
627 * Macro which expands to output section for percpu area. If @vaddr
628 * is not blank, it specifies explicit base address and all percpu
629 * symbols will be offset from the given address. If blank, @vaddr
630 * always equals @laddr + LOAD_OFFSET.
631 *
632 * @phdr defines the output PHDR to use if not blank. Be warned that
633 * output PHDR is sticky. If @phdr is specified, the next output
634 * section in the linker script will go there too. @phdr should have
635 * a leading colon.
636 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900637 * Note that this macros defines __per_cpu_load as an absolute symbol.
638 * If there is no need to put the percpu section at a predetermined
639 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900640 */
641#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100642 VMLINUX_SYMBOL(__per_cpu_load) = .; \
643 .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900644 - LOAD_OFFSET) { \
645 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Brian Gerst0bd74fa2009-01-19 12:21:27 +0900646 *(.data.percpu.first) \
Eric Dumazet63cc8c72008-05-12 15:44:40 +0200647 *(.data.percpu.page_aligned) \
Fenghua Yu5fb7dc32007-07-19 01:48:12 -0700648 *(.data.percpu) \
649 *(.data.percpu.shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900650 VMLINUX_SYMBOL(__per_cpu_end) = .; \
651 } phdr \
Ingo Molnardba3d362009-01-29 17:10:12 +0100652 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900653
654/**
655 * PERCPU - define output section for percpu area, simple version
656 * @align: required alignment
657 *
658 * Align to @align and outputs output section for percpu area. This
659 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
660 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900661 *
662 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
663 * that __per_cpu_load is defined as a relative symbol against
664 * .data.percpu which is required for relocatable x86_32
665 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900666 */
667#define PERCPU(align) \
668 . = ALIGN(align); \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900669 .data.percpu : AT(ADDR(.data.percpu) - LOAD_OFFSET) { \
670 VMLINUX_SYMBOL(__per_cpu_load) = .; \
671 VMLINUX_SYMBOL(__per_cpu_start) = .; \
672 *(.data.percpu.first) \
673 *(.data.percpu.page_aligned) \
674 *(.data.percpu) \
675 *(.data.percpu.shared_aligned) \
676 VMLINUX_SYMBOL(__per_cpu_end) = .; \
677 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200678
679
680/*
681 * Definition of the high level *_SECTION macros
682 * They will fit only a subset of the architectures
683 */
684
685
686/*
687 * Writeable data.
688 * All sections are combined in a single .data section.
689 * The sections following CONSTRUCTORS are arranged so their
690 * typical alignment matches.
691 * A cacheline is typical/always less than a PAGE_SIZE so
692 * the sections that has this restriction (or similar)
693 * is located before the ones requiring PAGE_SIZE alignment.
694 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
695 * matches the requirment of PAGE_ALIGNED_DATA.
696 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200697 * use 0 as page_align if page_aligned data is not used */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200698#define RW_DATA_SECTION(cacheline, nosave, pagealigned, inittask) \
699 . = ALIGN(PAGE_SIZE); \
700 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
701 INIT_TASK(inittask) \
702 CACHELINE_ALIGNED_DATA(cacheline) \
703 READ_MOSTLY_DATA(cacheline) \
704 DATA_DATA \
705 CONSTRUCTORS \
706 NOSAVE_DATA(nosave) \
707 PAGE_ALIGNED_DATA(pagealigned) \
708 }
709
710#define INIT_TEXT_SECTION(inittext_align) \
711 . = ALIGN(inittext_align); \
712 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
713 VMLINUX_SYMBOL(_sinittext) = .; \
714 INIT_TEXT \
715 VMLINUX_SYMBOL(_einittext) = .; \
716 }
717
718#define INIT_DATA_SECTION(initsetup_align) \
719 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
720 INIT_DATA \
721 INIT_SETUP(initsetup_align) \
722 INIT_CALLS \
723 CON_INITCALL \
724 SECURITY_INITCALL \
725 INIT_RAM_FS \
726 }
727
728#define BSS_SECTION(sbss_align, bss_align) \
729 SBSS \
730 BSS(bss_align) \
Sam Ravnborg7923f902009-06-14 22:10:41 +0200731 . = ALIGN(4);
732