blob: 0c6387d6a6aef1e82826de20523e5947ff2f7c46 [file] [log] [blame]
Sam Ravnborgef53dae2009-06-07 20:46:37 +02001/*
2 * Helper macros to support writing architecture specific
3 * linker scripts.
4 *
5 * A minimal linker scripts has following content:
6 * [This is a sample, architectures may have special requiriements]
7 *
8 * OUTPUT_FORMAT(...)
9 * OUTPUT_ARCH(...)
10 * ENTRY(...)
11 * SECTIONS
12 * {
13 * . = START;
14 * __init_begin = .;
Sam Ravnborg7923f902009-06-14 22:10:41 +020015 * HEAD_TEXT_SECTION
Sam Ravnborgef53dae2009-06-07 20:46:37 +020016 * INIT_TEXT_SECTION(PAGE_SIZE)
17 * INIT_DATA_SECTION(...)
18 * PERCPU(PAGE_SIZE)
19 * __init_end = .;
20 *
21 * _stext = .;
22 * TEXT_SECTION = 0
23 * _etext = .;
24 *
25 * _sdata = .;
26 * RO_DATA_SECTION(PAGE_SIZE)
27 * RW_DATA_SECTION(...)
28 * _edata = .;
29 *
30 * EXCEPTION_TABLE(...)
31 * NOTES
32 *
Tim Abbott04e448d2009-07-12 18:23:33 -040033 * BSS_SECTION(0, 0, 0)
Sam Ravnborgef53dae2009-06-07 20:46:37 +020034 * _end = .;
35 *
Sam Ravnborgef53dae2009-06-07 20:46:37 +020036 * STABS_DEBUG
37 * DWARF_DEBUG
Tejun Heo023bf6f2009-07-09 11:27:40 +090038 *
39 * DISCARDS // must be the last
Sam Ravnborgef53dae2009-06-07 20:46:37 +020040 * }
41 *
42 * [__init_begin, __init_end] is the init section that may be freed after init
43 * [_stext, _etext] is the text section
44 * [_sdata, _edata] is the data section
45 *
46 * Some of the included output section have their own set of constants.
47 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
48 * [__nosave_begin, __nosave_end] for the nosave data
49 */
Tim Abbottc80d4712009-04-25 22:10:56 -040050
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#ifndef LOAD_OFFSET
52#define LOAD_OFFSET 0
53#endif
54
Alan Jenkins9e1b9b82009-11-07 21:03:54 +000055#ifndef SYMBOL_PREFIX
56#define VMLINUX_SYMBOL(sym) sym
57#else
58#define PASTE2(x,y) x##y
59#define PASTE(x,y) PASTE2(x,y)
60#define VMLINUX_SYMBOL(sym) PASTE(SYMBOL_PREFIX, sym)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#endif
62
Sam Ravnborg6d30e3a82005-07-14 20:15:44 +000063/* Align . to a 8 byte boundary equals to maximum function alignment. */
64#define ALIGN_FUNCTION() . = ALIGN(8)
65
Sam Ravnborg07fca0e2010-07-10 08:35:00 +020066/*
67 * Align to a 32 byte boundary equal to the
68 * alignment gcc 4.5 uses for a struct
69 */
70#define STRUCT_ALIGN() . = ALIGN(32)
71
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010072/* The actual configuration determine if the init/exit sections
73 * are handled as text/data or they can be discarded (which
74 * often happens at runtime)
75 */
76#ifdef CONFIG_HOTPLUG
77#define DEV_KEEP(sec) *(.dev##sec)
78#define DEV_DISCARD(sec)
79#else
80#define DEV_KEEP(sec)
81#define DEV_DISCARD(sec) *(.dev##sec)
82#endif
83
84#ifdef CONFIG_HOTPLUG_CPU
85#define CPU_KEEP(sec) *(.cpu##sec)
86#define CPU_DISCARD(sec)
87#else
88#define CPU_KEEP(sec)
89#define CPU_DISCARD(sec) *(.cpu##sec)
90#endif
91
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010092#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010093#define MEM_KEEP(sec) *(.mem##sec)
94#define MEM_DISCARD(sec)
95#else
96#define MEM_KEEP(sec)
97#define MEM_DISCARD(sec) *(.mem##sec)
98#endif
99
Steven Rostedt8da38212008-08-14 15:45:07 -0400100#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -0700101#define MCOUNT_REC() . = ALIGN(8); \
102 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -0400103 *(__mcount_loc) \
104 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
105#else
106#define MCOUNT_REC()
107#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100108
Steven Rostedt2ed84ee2008-11-12 15:24:24 -0500109#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -0500110#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
111 *(_ftrace_annotated_branch) \
112 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500113#else
114#define LIKELY_PROFILE()
115#endif
116
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500117#ifdef CONFIG_PROFILE_ALL_BRANCHES
118#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
119 *(_ftrace_branch) \
120 VMLINUX_SYMBOL(__stop_branch_profile) = .;
121#else
122#define BRANCH_PROFILE()
123#endif
124
Tom Zanussi5f77a882009-04-08 03:14:01 -0500125#ifdef CONFIG_EVENT_TRACING
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500126#define FTRACE_EVENTS() VMLINUX_SYMBOL(__start_ftrace_events) = .; \
127 *(_ftrace_events) \
128 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
129#else
130#define FTRACE_EVENTS()
131#endif
132
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100133#ifdef CONFIG_TRACING
134#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
135 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
136 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
137#else
138#define TRACE_PRINTKS()
139#endif
140
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100141#ifdef CONFIG_FTRACE_SYSCALLS
142#define TRACE_SYSCALLS() VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
143 *(__syscalls_metadata) \
144 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
145#else
146#define TRACE_SYSCALLS()
147#endif
148
Sam Ravnborgca967252007-05-17 13:38:44 +0200149/* .data section */
150#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200151 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100152 *(.ref.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100153 DEV_KEEP(init.data) \
154 DEV_KEEP(exit.data) \
155 CPU_KEEP(init.data) \
156 CPU_KEEP(exit.data) \
157 MEM_KEEP(init.data) \
158 MEM_KEEP(exit.data) \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700159 . = ALIGN(8); \
160 VMLINUX_SYMBOL(__start___markers) = .; \
161 *(__markers) \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400162 VMLINUX_SYMBOL(__stop___markers) = .; \
Mathieu Desnoyers7e066fb2008-11-14 17:47:47 -0500163 . = ALIGN(32); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400164 VMLINUX_SYMBOL(__start___tracepoints) = .; \
165 *(__tracepoints) \
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500166 VMLINUX_SYMBOL(__stop___tracepoints) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500167 /* implement dynamic printk debug */ \
168 . = ALIGN(8); \
169 VMLINUX_SYMBOL(__start___verbose) = .; \
170 *(__verbose) \
171 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500172 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500173 BRANCH_PROFILE() \
Ingo Molnar8a20d842009-03-09 10:09:06 +0100174 TRACE_PRINTKS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200175 \
176 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100177 FTRACE_EVENTS() \
Sam Ravnborg07fca0e2010-07-10 08:35:00 +0200178 \
179 STRUCT_ALIGN(); \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100180 TRACE_SYSCALLS()
Sam Ravnborgca967252007-05-17 13:38:44 +0200181
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200182/*
183 * Data section helpers
184 */
185#define NOSAVE_DATA \
186 . = ALIGN(PAGE_SIZE); \
187 VMLINUX_SYMBOL(__nosave_begin) = .; \
Denys Vlasenko07b3bb12010-02-20 01:03:52 +0100188 *(.data..nosave) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200189 . = ALIGN(PAGE_SIZE); \
190 VMLINUX_SYMBOL(__nosave_end) = .;
191
192#define PAGE_ALIGNED_DATA(page_align) \
193 . = ALIGN(page_align); \
Tim Abbott75b13482010-02-20 01:03:37 +0100194 *(.data..page_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200195
196#define READ_MOSTLY_DATA(align) \
197 . = ALIGN(align); \
Denys Vlasenko54cb27a2010-02-20 01:03:44 +0100198 *(.data..read_mostly)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200199
200#define CACHELINE_ALIGNED_DATA(align) \
201 . = ALIGN(align); \
Tim Abbott4af57b72010-02-20 01:03:34 +0100202 *(.data..cacheline_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200203
Tim Abbott39a449d2009-06-23 18:53:15 -0400204#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200205 . = ALIGN(align); \
Tim Abbott2af76872010-02-20 01:03:35 +0100206 *(.data..init_task)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200207
208/*
209 * Read only Data
210 */
211#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200212 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100214 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 *(.rodata) *(.rodata.*) \
216 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers8256e472007-10-18 23:41:06 -0700217 *(__markers_strings) /* Markers: strings */ \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400218 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 } \
220 \
221 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
222 *(.rodata1) \
223 } \
224 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200225 BUG_TABLE \
226 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 /* PCI quirks */ \
228 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
229 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
230 *(.pci_fixup_early) \
231 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
232 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
233 *(.pci_fixup_header) \
234 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
235 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
236 *(.pci_fixup_final) \
237 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
238 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
239 *(.pci_fixup_enable) \
240 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800241 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
242 *(.pci_fixup_resume) \
243 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200244 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
245 *(.pci_fixup_resume_early) \
246 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
247 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
248 *(.pci_fixup_suspend) \
249 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 } \
251 \
David Woodhouse5658c762008-05-23 13:52:42 +0100252 /* Built-in firmware blobs */ \
253 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
254 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
255 *(.builtin_fw) \
256 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
257 } \
258 \
Matt Porter394b7012005-11-07 01:00:15 -0800259 /* RapidIO route ops */ \
Alexandre Bouninee5cabeb2010-05-26 14:43:59 -0700260 .rio_ops : AT(ADDR(.rio_ops) - LOAD_OFFSET) { \
Alexandre Bounine058f88d62010-05-26 14:44:03 -0700261 VMLINUX_SYMBOL(__start_rio_switch_ops) = .; \
262 *(.rio_switch_ops) \
263 VMLINUX_SYMBOL(__end_rio_switch_ops) = .; \
Matt Porter394b7012005-11-07 01:00:15 -0800264 } \
265 \
Jan Beulich63687a52008-05-12 15:44:41 +0200266 TRACEDATA \
267 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 /* Kernel symbol table: Normal symbols */ \
269 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
270 VMLINUX_SYMBOL(__start___ksymtab) = .; \
271 *(__ksymtab) \
272 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
273 } \
274 \
275 /* Kernel symbol table: GPL-only symbols */ \
276 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
277 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
278 *(__ksymtab_gpl) \
279 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
280 } \
281 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700282 /* Kernel symbol table: Normal unused symbols */ \
283 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
284 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
285 *(__ksymtab_unused) \
286 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
287 } \
288 \
289 /* Kernel symbol table: GPL-only unused symbols */ \
290 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
291 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
292 *(__ksymtab_unused_gpl) \
293 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
294 } \
295 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800296 /* Kernel symbol table: GPL-future-only symbols */ \
297 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
298 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
299 *(__ksymtab_gpl_future) \
300 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
301 } \
302 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 /* Kernel symbol table: Normal symbols */ \
304 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
305 VMLINUX_SYMBOL(__start___kcrctab) = .; \
306 *(__kcrctab) \
307 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
308 } \
309 \
310 /* Kernel symbol table: GPL-only symbols */ \
311 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
312 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
313 *(__kcrctab_gpl) \
314 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
315 } \
316 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700317 /* Kernel symbol table: Normal unused symbols */ \
318 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
319 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
320 *(__kcrctab_unused) \
321 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
322 } \
323 \
324 /* Kernel symbol table: GPL-only unused symbols */ \
325 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
326 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
327 *(__kcrctab_unused_gpl) \
328 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
329 } \
330 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800331 /* Kernel symbol table: GPL-future-only symbols */ \
332 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
333 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
334 *(__kcrctab_gpl_future) \
335 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
336 } \
337 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 /* Kernel symbol table: strings */ \
339 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
340 *(__ksymtab_strings) \
341 } \
342 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100343 /* __*init sections */ \
344 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100345 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100346 DEV_KEEP(init.rodata) \
347 DEV_KEEP(exit.rodata) \
348 CPU_KEEP(init.rodata) \
349 CPU_KEEP(exit.rodata) \
350 MEM_KEEP(init.rodata) \
351 MEM_KEEP(exit.rodata) \
352 } \
353 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 /* Built-in module parameters. */ \
355 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
356 VMLINUX_SYMBOL(__start___param) = .; \
357 *(__param) \
358 VMLINUX_SYMBOL(__stop___param) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100359 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100360 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700361 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200362 . = ALIGN((align));
363
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200364/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200365 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200366#define RODATA RO_DATA_SECTION(4096)
367#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700370 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 VMLINUX_SYMBOL(__security_initcall_start) = .; \
372 *(.security_initcall.init) \
373 VMLINUX_SYMBOL(__security_initcall_end) = .; \
374 }
375
Sam Ravnborg76647092007-05-13 00:31:33 +0200376/* .text section. Map to function alignment to avoid address changes
377 * during second ld run in second ld pass when generating System.map */
378#define TEXT_TEXT \
379 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100380 *(.text.hot) \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200381 *(.text) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100382 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100383 DEV_KEEP(init.text) \
384 DEV_KEEP(exit.text) \
385 CPU_KEEP(init.text) \
386 CPU_KEEP(exit.text) \
387 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100388 MEM_KEEP(exit.text) \
389 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100390
Sam Ravnborg76647092007-05-13 00:31:33 +0200391
Sam Ravnborg6d30e3a82005-07-14 20:15:44 +0000392/* sched.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 SCHED_TEXT \
Sam Ravnborg6d30e3a82005-07-14 20:15:44 +0000395 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 VMLINUX_SYMBOL(__sched_text_start) = .; \
397 *(.sched.text) \
398 VMLINUX_SYMBOL(__sched_text_end) = .;
399
Sam Ravnborg6d30e3a82005-07-14 20:15:44 +0000400/* spinlock.text is aling to function alignment to secure we have same
401 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402#define LOCK_TEXT \
Sam Ravnborg6d30e3a82005-07-14 20:15:44 +0000403 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 VMLINUX_SYMBOL(__lock_text_start) = .; \
405 *(.spinlock.text) \
406 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700407
408#define KPROBES_TEXT \
409 ALIGN_FUNCTION(); \
410 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
411 *(.kprobes.text) \
412 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200413
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100414#ifdef CONFIG_FUNCTION_GRAPH_TRACER
415#define IRQENTRY_TEXT \
416 ALIGN_FUNCTION(); \
417 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
418 *(.irqentry.text) \
419 VMLINUX_SYMBOL(__irqentry_text_end) = .;
420#else
421#define IRQENTRY_TEXT
422#endif
423
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100424/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200425#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100426
Sam Ravnborg7923f902009-06-14 22:10:41 +0200427#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200428 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
429 HEAD_TEXT \
430 }
431
432/*
433 * Exception table
434 */
435#define EXCEPTION_TABLE(align) \
436 . = ALIGN(align); \
437 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
438 VMLINUX_SYMBOL(__start___ex_table) = .; \
439 *(__ex_table) \
440 VMLINUX_SYMBOL(__stop___ex_table) = .; \
441 }
442
443/*
444 * Init task
445 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400446#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200447 . = ALIGN(align); \
Sam Ravnborgda5e37e2010-07-13 11:39:42 +0200448 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400449 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200450 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100451
Peter Oberparleiterb99b87f72009-06-17 16:28:03 -0700452#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700453#define KERNEL_CTORS() . = ALIGN(8); \
454 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f72009-06-17 16:28:03 -0700455 *(.ctors) \
456 VMLINUX_SYMBOL(__ctors_end) = .;
457#else
458#define KERNEL_CTORS()
459#endif
460
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100461/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100462#define INIT_DATA \
463 *(.init.data) \
464 DEV_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100465 CPU_DISCARD(init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100466 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f72009-06-17 16:28:03 -0700467 KERNEL_CTORS() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000468 *(.init.rodata) \
John Reiser4b3b4c52009-07-27 11:23:50 -0700469 MCOUNT_REC() \
Jan Beulichfd6c3a82009-03-12 10:58:33 +0000470 DEV_DISCARD(init.rodata) \
471 CPU_DISCARD(init.rodata) \
Jason Barone9d376f2009-02-05 11:51:38 -0500472 MEM_DISCARD(init.rodata)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100473
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100474#define INIT_TEXT \
475 *(.init.text) \
476 DEV_DISCARD(init.text) \
477 CPU_DISCARD(init.text) \
478 MEM_DISCARD(init.text)
479
480#define EXIT_DATA \
481 *(.exit.data) \
482 DEV_DISCARD(exit.data) \
483 DEV_DISCARD(exit.rodata) \
484 CPU_DISCARD(exit.data) \
485 CPU_DISCARD(exit.rodata) \
486 MEM_DISCARD(exit.data) \
487 MEM_DISCARD(exit.rodata)
488
489#define EXIT_TEXT \
490 *(.exit.text) \
491 DEV_DISCARD(exit.text) \
492 CPU_DISCARD(exit.text) \
493 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100494
Sam Ravnborg7923f902009-06-14 22:10:41 +0200495#define EXIT_CALL \
496 *(.exitcall.exit)
497
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200498/*
499 * bss (Block Started by Symbol) - uninitialized data
500 * zeroed during startup
501 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400502#define SBSS(sbss_align) \
503 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200504 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
505 *(.sbss) \
506 *(.scommon) \
507 }
508
509#define BSS(bss_align) \
510 . = ALIGN(bss_align); \
511 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
Tim Abbott7c74df02010-02-20 01:03:38 +0100512 *(.bss..page_aligned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200513 *(.dynbss) \
514 *(.bss) \
515 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200516 }
517
518/*
519 * DWARF debug sections.
520 * Symbols in the DWARF debugging sections are relative to
521 * the beginning of the section so we begin them at 0.
522 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200523#define DWARF_DEBUG \
524 /* DWARF 1 */ \
525 .debug 0 : { *(.debug) } \
526 .line 0 : { *(.line) } \
527 /* GNU DWARF 1 extensions */ \
528 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
529 .debug_sfnames 0 : { *(.debug_sfnames) } \
530 /* DWARF 1.1 and DWARF 2 */ \
531 .debug_aranges 0 : { *(.debug_aranges) } \
532 .debug_pubnames 0 : { *(.debug_pubnames) } \
533 /* DWARF 2 */ \
534 .debug_info 0 : { *(.debug_info \
535 .gnu.linkonce.wi.*) } \
536 .debug_abbrev 0 : { *(.debug_abbrev) } \
537 .debug_line 0 : { *(.debug_line) } \
538 .debug_frame 0 : { *(.debug_frame) } \
539 .debug_str 0 : { *(.debug_str) } \
540 .debug_loc 0 : { *(.debug_loc) } \
541 .debug_macinfo 0 : { *(.debug_macinfo) } \
542 /* SGI/MIPS DWARF 2 extensions */ \
543 .debug_weaknames 0 : { *(.debug_weaknames) } \
544 .debug_funcnames 0 : { *(.debug_funcnames) } \
545 .debug_typenames 0 : { *(.debug_typenames) } \
546 .debug_varnames 0 : { *(.debug_varnames) } \
547
548 /* Stabs debugging sections. */
549#define STABS_DEBUG \
550 .stab 0 : { *(.stab) } \
551 .stabstr 0 : { *(.stabstr) } \
552 .stab.excl 0 : { *(.stab.excl) } \
553 .stab.exclstr 0 : { *(.stab.exclstr) } \
554 .stab.index 0 : { *(.stab.index) } \
555 .stab.indexstr 0 : { *(.stab.indexstr) } \
556 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700557
Jan Beulich6360b1f2008-05-12 15:44:41 +0200558#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800559#define BUG_TABLE \
560 . = ALIGN(8); \
561 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700562 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800563 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700564 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800565 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200566#else
567#define BUG_TABLE
568#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800569
Jan Beulich63687a52008-05-12 15:44:41 +0200570#ifdef CONFIG_PM_TRACE
571#define TRACEDATA \
572 . = ALIGN(4); \
573 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700574 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200575 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700576 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200577 }
578#else
579#define TRACEDATA
580#endif
581
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700582#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700583 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
584 VMLINUX_SYMBOL(__start_notes) = .; \
585 *(.note.*) \
586 VMLINUX_SYMBOL(__stop_notes) = .; \
587 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700588
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200589#define INIT_SETUP(initsetup_align) \
590 . = ALIGN(initsetup_align); \
591 VMLINUX_SYMBOL(__setup_start) = .; \
592 *(.init.setup) \
593 VMLINUX_SYMBOL(__setup_end) = .;
594
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700595#define INITCALLS \
Eduard - Gabriel Munteanuc2147a52008-07-25 19:45:11 -0700596 *(.initcallearly.init) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700597 VMLINUX_SYMBOL(__early_initcall_end) = .; \
Linus Torvaldsb3438f82006-11-20 11:47:18 -0800598 *(.initcall0.init) \
599 *(.initcall0s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700600 *(.initcall1.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700601 *(.initcall1s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700602 *(.initcall2.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700603 *(.initcall2s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700604 *(.initcall3.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700605 *(.initcall3s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700606 *(.initcall4.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700607 *(.initcall4s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700608 *(.initcall5.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700609 *(.initcall5s.init) \
Linus Torvalds8d610dd2006-12-11 12:12:04 -0800610 *(.initcallrootfs.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700611 *(.initcall6.init) \
Andrew Morton735a7ff2006-10-27 11:42:37 -0700612 *(.initcall6s.init) \
613 *(.initcall7.init) \
614 *(.initcall7s.init)
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700615
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200616#define INIT_CALLS \
617 VMLINUX_SYMBOL(__initcall_start) = .; \
618 INITCALLS \
619 VMLINUX_SYMBOL(__initcall_end) = .;
620
621#define CON_INITCALL \
622 VMLINUX_SYMBOL(__con_initcall_start) = .; \
623 *(.con_initcall.init) \
624 VMLINUX_SYMBOL(__con_initcall_end) = .;
625
626#define SECURITY_INITCALL \
627 VMLINUX_SYMBOL(__security_initcall_start) = .; \
628 *(.security_initcall.init) \
629 VMLINUX_SYMBOL(__security_initcall_end) = .;
630
631#ifdef CONFIG_BLK_DEV_INITRD
632#define INIT_RAM_FS \
633 . = ALIGN(PAGE_SIZE); \
634 VMLINUX_SYMBOL(__initramfs_start) = .; \
635 *(.init.ramfs) \
Hendrik Bruecknerffe80182010-09-17 15:24:11 -0700636 . = ALIGN(8); \
637 *(.init.ramfs.info)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200638#else
David Howellseadfe212009-06-22 15:32:31 +0100639#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200640#endif
641
Tejun Heo023bf6f2009-07-09 11:27:40 +0900642/*
643 * Default discarded sections.
644 *
645 * Some archs want to discard exit text/data at runtime rather than
646 * link time due to cross-section references such as alt instructions,
647 * bug table, eh_frame, etc. DISCARDS must be the last of output
648 * section definitions so that such archs put those in earlier section
649 * definitions.
650 */
Tejun Heo405d9672009-06-24 15:13:38 +0900651#define DISCARDS \
652 /DISCARD/ : { \
653 EXIT_TEXT \
654 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900655 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900656 *(.discard) \
657 }
658
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900659/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900660 * PERCPU_VADDR - define output section for percpu area
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900661 * @vaddr: explicit base address (optional)
662 * @phdr: destination PHDR (optional)
663 *
664 * Macro which expands to output section for percpu area. If @vaddr
665 * is not blank, it specifies explicit base address and all percpu
666 * symbols will be offset from the given address. If blank, @vaddr
667 * always equals @laddr + LOAD_OFFSET.
668 *
669 * @phdr defines the output PHDR to use if not blank. Be warned that
670 * output PHDR is sticky. If @phdr is specified, the next output
671 * section in the linker script will go there too. @phdr should have
672 * a leading colon.
673 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900674 * Note that this macros defines __per_cpu_load as an absolute symbol.
675 * If there is no need to put the percpu section at a predetermined
676 * address, use PERCPU().
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900677 */
678#define PERCPU_VADDR(vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100679 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100680 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900681 - LOAD_OFFSET) { \
682 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100683 *(.data..percpu..first) \
684 *(.data..percpu..page_aligned) \
685 *(.data..percpu) \
686 *(.data..percpu..shared_aligned) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900687 VMLINUX_SYMBOL(__per_cpu_end) = .; \
688 } phdr \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100689 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900690
691/**
692 * PERCPU - define output section for percpu area, simple version
693 * @align: required alignment
694 *
695 * Align to @align and outputs output section for percpu area. This
696 * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
697 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900698 *
699 * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
700 * that __per_cpu_load is defined as a relative symbol against
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100701 * .data..percpu which is required for relocatable x86_32
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900702 * configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900703 */
704#define PERCPU(align) \
705 . = ALIGN(align); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100706 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900707 VMLINUX_SYMBOL(__per_cpu_load) = .; \
708 VMLINUX_SYMBOL(__per_cpu_start) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100709 *(.data..percpu..first) \
710 *(.data..percpu..page_aligned) \
711 *(.data..percpu) \
712 *(.data..percpu..shared_aligned) \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900713 VMLINUX_SYMBOL(__per_cpu_end) = .; \
714 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200715
716
717/*
718 * Definition of the high level *_SECTION macros
719 * They will fit only a subset of the architectures
720 */
721
722
723/*
724 * Writeable data.
725 * All sections are combined in a single .data section.
726 * The sections following CONSTRUCTORS are arranged so their
727 * typical alignment matches.
728 * A cacheline is typical/always less than a PAGE_SIZE so
729 * the sections that has this restriction (or similar)
730 * is located before the ones requiring PAGE_SIZE alignment.
731 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
732 * matches the requirment of PAGE_ALIGNED_DATA.
733 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200734 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900735#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200736 . = ALIGN(PAGE_SIZE); \
737 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400738 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400739 NOSAVE_DATA \
740 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200741 CACHELINE_ALIGNED_DATA(cacheline) \
742 READ_MOSTLY_DATA(cacheline) \
743 DATA_DATA \
744 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200745 }
746
747#define INIT_TEXT_SECTION(inittext_align) \
748 . = ALIGN(inittext_align); \
749 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
750 VMLINUX_SYMBOL(_sinittext) = .; \
751 INIT_TEXT \
752 VMLINUX_SYMBOL(_einittext) = .; \
753 }
754
755#define INIT_DATA_SECTION(initsetup_align) \
756 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
757 INIT_DATA \
758 INIT_SETUP(initsetup_align) \
759 INIT_CALLS \
760 CON_INITCALL \
761 SECURITY_INITCALL \
762 INIT_RAM_FS \
763 }
764
Tim Abbott04e448d2009-07-12 18:23:33 -0400765#define BSS_SECTION(sbss_align, bss_align, stop_align) \
766 . = ALIGN(sbss_align); \
767 VMLINUX_SYMBOL(__bss_start) = .; \
768 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200769 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400770 . = ALIGN(stop_align); \
771 VMLINUX_SYMBOL(__bss_stop) = .;