blob: 8bd374d3cf21fb0ee32e217f7f7eb6915c992514 [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(...)
Tejun Heo0415b00d12011-03-24 18:50:09 +010018 * PERCPU_SECTION(CACHELINE_SIZE)
Sam Ravnborgef53dae2009-06-07 20:46:37 +020019 * __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
Yalin Wang562c85c2014-09-26 03:30:59 +010043 * // __init_begin and __init_end should be page aligned, so that we can
44 * // free the whole .init memory
Sam Ravnborgef53dae2009-06-07 20:46:37 +020045 * [_stext, _etext] is the text section
46 * [_sdata, _edata] is the data section
47 *
48 * Some of the included output section have their own set of constants.
49 * Examples are: [__initramfs_start, __initramfs_end] for initramfs and
50 * [__nosave_begin, __nosave_end] for the nosave data
51 */
Tim Abbottc80d4712009-04-25 22:10:56 -040052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#ifndef LOAD_OFFSET
54#define LOAD_OFFSET 0
55#endif
56
Rusty Russellb92021b2013-03-15 15:04:17 +103057#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
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 Ravnborg07fca0e2010-07-10 08:35:00 +020062/*
63 * Align to a 32 byte boundary equal to the
64 * alignment gcc 4.5 uses for a struct
65 */
Dirk Brandewieaab94332010-12-22 11:57:26 -080066#define STRUCT_ALIGNMENT 32
67#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
Sam Ravnborg07fca0e2010-07-10 08:35:00 +020068
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010069/* The actual configuration determine if the init/exit sections
70 * are handled as text/data or they can be discarded (which
71 * often happens at runtime)
72 */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010073#ifdef CONFIG_HOTPLUG_CPU
74#define CPU_KEEP(sec) *(.cpu##sec)
75#define CPU_DISCARD(sec)
76#else
77#define CPU_KEEP(sec)
78#define CPU_DISCARD(sec) *(.cpu##sec)
79#endif
80
Adrian Bunk1a3fb6d2008-01-24 22:20:18 +010081#if defined(CONFIG_MEMORY_HOTPLUG)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010082#define MEM_KEEP(sec) *(.mem##sec)
83#define MEM_DISCARD(sec)
84#else
85#define MEM_KEEP(sec)
86#define MEM_DISCARD(sec) *(.mem##sec)
87#endif
88
Steven Rostedt8da38212008-08-14 15:45:07 -040089#ifdef CONFIG_FTRACE_MCOUNT_RECORD
John Reiser4b3b4c52009-07-27 11:23:50 -070090#define MCOUNT_REC() . = ALIGN(8); \
91 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
Steven Rostedt8da38212008-08-14 15:45:07 -040092 *(__mcount_loc) \
93 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
94#else
95#define MCOUNT_REC()
96#endif
Sam Ravnborgeb8f6892008-01-20 20:07:28 +010097
Steven Rostedt2ed84ee2008-11-12 15:24:24 -050098#ifdef CONFIG_TRACE_BRANCH_PROFILING
Steven Rostedt45b79742008-11-21 00:40:40 -050099#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
100 *(_ftrace_annotated_branch) \
101 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
Steven Rostedt1f0d69a2008-11-12 00:14:39 -0500102#else
103#define LIKELY_PROFILE()
104#endif
105
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500106#ifdef CONFIG_PROFILE_ALL_BRANCHES
107#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
108 *(_ftrace_branch) \
109 VMLINUX_SYMBOL(__stop_branch_profile) = .;
110#else
111#define BRANCH_PROFILE()
112#endif
113
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900114#ifdef CONFIG_KPROBES
Vineet Gupta69902c72014-05-01 10:56:44 +0530115#define KPROBE_BLACKLIST() . = ALIGN(8); \
116 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900117 *(_kprobe_blacklist) \
118 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
119#else
120#define KPROBE_BLACKLIST()
121#endif
122
Tom Zanussi5f77a882009-04-08 03:14:01 -0500123#ifdef CONFIG_EVENT_TRACING
Steven Rostedte4a9ea52011-01-27 09:15:30 -0500124#define FTRACE_EVENTS() . = ALIGN(8); \
125 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500126 *(_ftrace_events) \
Steven Rostedt (Red Hat)0c564a52015-03-24 17:58:09 -0400127 VMLINUX_SYMBOL(__stop_ftrace_events) = .; \
128 VMLINUX_SYMBOL(__start_ftrace_enum_maps) = .; \
129 *(_ftrace_enum_map) \
130 VMLINUX_SYMBOL(__stop_ftrace_enum_maps) = .;
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500131#else
132#define FTRACE_EVENTS()
133#endif
134
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100135#ifdef CONFIG_TRACING
136#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
137 *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
138 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
Steven Rostedt (Red Hat)102c9322013-07-12 17:07:27 -0400139#define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
140 *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
141 VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100142#else
143#define TRACE_PRINTKS()
Steven Rostedt (Red Hat)102c9322013-07-12 17:07:27 -0400144#define TRACEPOINT_STR()
Lai Jiangshan1ba28e02009-03-06 17:21:48 +0100145#endif
146
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100147#ifdef CONFIG_FTRACE_SYSCALLS
Steven Rostedt3d56e332011-02-02 17:06:09 -0500148#define TRACE_SYSCALLS() . = ALIGN(8); \
149 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
Frederic Weisbeckerbed1ffc2009-03-13 15:42:11 +0100150 *(__syscalls_metadata) \
151 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
152#else
153#define TRACE_SYSCALLS()
154#endif
155
Peter Hurley470ca0d2015-03-09 16:27:21 -0400156#ifdef CONFIG_SERIAL_EARLYCON
Peter Hurley99492c32015-04-03 08:57:51 -0400157#define EARLYCON_TABLE() STRUCT_ALIGN(); \
Peter Hurley470ca0d2015-03-09 16:27:21 -0400158 VMLINUX_SYMBOL(__earlycon_table) = .; \
159 *(__earlycon_table) \
160 *(__earlycon_table_end)
161#else
162#define EARLYCON_TABLE()
163#endif
Dirk Brandewieaab94332010-12-22 11:57:26 -0800164
Rob Herring06309282014-03-24 16:59:20 -0500165#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
166#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
167#define OF_TABLE(cfg, name) __OF_TABLE(config_enabled(cfg), name)
168#define _OF_TABLE_0(name)
169#define _OF_TABLE_1(name) \
Thomas Petazzonif6e916b2012-11-20 23:00:52 +0100170 . = ALIGN(8); \
Rob Herring06309282014-03-24 16:59:20 -0500171 VMLINUX_SYMBOL(__##name##_of_table) = .; \
172 *(__##name##_of_table) \
173 *(__##name##_of_table_end)
Dirk Brandewieaab94332010-12-22 11:57:26 -0800174
Rob Herring06309282014-03-24 16:59:20 -0500175#define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
176#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
177#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
Will Deacon1cd076b2014-08-27 14:40:58 +0100178#define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
Rob Herring06309282014-03-24 16:59:20 -0500179#define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
180#define CPU_METHOD_OF_TABLES() OF_TABLE(CONFIG_SMP, cpu_method)
Daniel Lezcano449e0562015-02-02 16:32:45 +0100181#define CPUIDLE_METHOD_OF_TABLES() OF_TABLE(CONFIG_CPU_IDLE, cpuidle_method)
Rob Herringb0b6abd2014-03-27 08:06:16 -0500182#define EARLYCON_OF_TABLES() OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
Stephen Boyd6c3ff8b2013-10-30 18:21:09 -0700183
Dirk Brandewieaab94332010-12-22 11:57:26 -0800184#define KERNEL_DTB() \
185 STRUCT_ALIGN(); \
186 VMLINUX_SYMBOL(__dtb_start) = .; \
187 *(.dtb.init.rodata) \
188 VMLINUX_SYMBOL(__dtb_end) = .;
189
Sam Ravnborgca967252007-05-17 13:38:44 +0200190/* .data section */
191#define DATA_DATA \
Sam Ravnborg0e0d3142007-05-17 20:14:48 +0200192 *(.data) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100193 *(.ref.data) \
Mike Frysingerd356c0b2010-10-26 14:22:29 -0700194 *(.data..shared_aligned) /* percpu related */ \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100195 MEM_KEEP(init.data) \
196 MEM_KEEP(exit.data) \
Jan Beulich7ccaba52012-03-23 15:01:52 -0700197 *(.data.unlikely) \
Mathieu Desnoyers65498642011-01-26 17:26:22 -0500198 STRUCT_ALIGN(); \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400199 *(__tracepoints) \
Jason Barone9d376f2009-02-05 11:51:38 -0500200 /* implement dynamic printk debug */ \
Jason Barond430d3d2011-03-16 17:29:47 -0400201 . = ALIGN(8); \
202 VMLINUX_SYMBOL(__start___jump_table) = .; \
203 *(__jump_table) \
204 VMLINUX_SYMBOL(__stop___jump_table) = .; \
Jason Barone9d376f2009-02-05 11:51:38 -0500205 . = ALIGN(8); \
206 VMLINUX_SYMBOL(__start___verbose) = .; \
207 *(__verbose) \
208 VMLINUX_SYMBOL(__stop___verbose) = .; \
Steven Rostedt2bcd5212008-11-21 01:30:54 -0500209 LIKELY_PROFILE() \
Steven Rostedtb77e38a2009-02-24 10:21:36 -0500210 BRANCH_PROFILE() \
Steven Rostedt (Red Hat)102c9322013-07-12 17:07:27 -0400211 TRACE_PRINTKS() \
212 TRACEPOINT_STR()
Sam Ravnborgca967252007-05-17 13:38:44 +0200213
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200214/*
215 * Data section helpers
216 */
217#define NOSAVE_DATA \
218 . = ALIGN(PAGE_SIZE); \
219 VMLINUX_SYMBOL(__nosave_begin) = .; \
Denys Vlasenko07b3bb12010-02-20 01:03:52 +0100220 *(.data..nosave) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200221 . = ALIGN(PAGE_SIZE); \
222 VMLINUX_SYMBOL(__nosave_end) = .;
223
224#define PAGE_ALIGNED_DATA(page_align) \
225 . = ALIGN(page_align); \
Tim Abbott75b13482010-02-20 01:03:37 +0100226 *(.data..page_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200227
228#define READ_MOSTLY_DATA(align) \
229 . = ALIGN(align); \
Shaohua Li83697442011-01-12 16:59:38 -0800230 *(.data..read_mostly) \
231 . = ALIGN(align);
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200232
233#define CACHELINE_ALIGNED_DATA(align) \
234 . = ALIGN(align); \
Tim Abbott4af57b72010-02-20 01:03:34 +0100235 *(.data..cacheline_aligned)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200236
Tim Abbott39a449d2009-06-23 18:53:15 -0400237#define INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200238 . = ALIGN(align); \
Tim Abbott2af76872010-02-20 01:03:35 +0100239 *(.data..init_task)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200240
241/*
242 * Read only Data
243 */
244#define RO_DATA_SECTION(align) \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200245 . = ALIGN((align)); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 .rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
Vivek Goyal65695802006-12-07 02:14:03 +0100247 VMLINUX_SYMBOL(__start_rodata) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 *(.rodata) *(.rodata.*) \
249 *(__vermagic) /* Kernel version magic */ \
Mathieu Desnoyers65498642011-01-26 17:26:22 -0500250 . = ALIGN(8); \
251 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .; \
252 *(__tracepoints_ptrs) /* Tracepoints: pointer array */\
253 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .; \
Mathieu Desnoyers97e1c182008-07-18 12:16:16 -0400254 *(__tracepoints_strings)/* Tracepoints: strings */ \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 } \
256 \
257 .rodata1 : AT(ADDR(.rodata1) - LOAD_OFFSET) { \
258 *(.rodata1) \
259 } \
260 \
Jan Beulich6360b1f2008-05-12 15:44:41 +0200261 BUG_TABLE \
262 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 /* PCI quirks */ \
264 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
265 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
266 *(.pci_fixup_early) \
267 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
268 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
269 *(.pci_fixup_header) \
270 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
271 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
272 *(.pci_fixup_final) \
273 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
274 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
275 *(.pci_fixup_enable) \
276 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
Alan Cox1597cac2006-12-04 15:14:45 -0800277 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
278 *(.pci_fixup_resume) \
279 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
Rafael J. Wysockie1a2a512008-05-15 21:51:31 +0200280 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
281 *(.pci_fixup_resume_early) \
282 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
283 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
284 *(.pci_fixup_suspend) \
285 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
Andreas Noever7d2a01b2014-06-03 22:04:09 +0200286 VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
287 *(.pci_fixup_suspend_late) \
288 VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 } \
290 \
David Woodhouse5658c762008-05-23 13:52:42 +0100291 /* Built-in firmware blobs */ \
292 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
293 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
294 *(.builtin_fw) \
295 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
296 } \
297 \
Jan Beulich63687a52008-05-12 15:44:41 +0200298 TRACEDATA \
299 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 /* Kernel symbol table: Normal symbols */ \
301 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
302 VMLINUX_SYMBOL(__start___ksymtab) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200303 *(SORT(___ksymtab+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
305 } \
306 \
307 /* Kernel symbol table: GPL-only symbols */ \
308 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
309 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200310 *(SORT(___ksymtab_gpl+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
312 } \
313 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700314 /* Kernel symbol table: Normal unused symbols */ \
315 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
316 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200317 *(SORT(___ksymtab_unused+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700318 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
319 } \
320 \
321 /* Kernel symbol table: GPL-only unused symbols */ \
322 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
323 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200324 *(SORT(___ksymtab_unused_gpl+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700325 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
326 } \
327 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800328 /* Kernel symbol table: GPL-future-only symbols */ \
329 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
330 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200331 *(SORT(___ksymtab_gpl_future+*)) \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800332 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
333 } \
334 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 /* Kernel symbol table: Normal symbols */ \
336 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
337 VMLINUX_SYMBOL(__start___kcrctab) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200338 *(SORT(___kcrctab+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
340 } \
341 \
342 /* Kernel symbol table: GPL-only symbols */ \
343 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
344 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200345 *(SORT(___kcrctab_gpl+*)) \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
347 } \
348 \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700349 /* Kernel symbol table: Normal unused symbols */ \
350 __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
351 VMLINUX_SYMBOL(__start___kcrctab_unused) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200352 *(SORT(___kcrctab_unused+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700353 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .; \
354 } \
355 \
356 /* Kernel symbol table: GPL-only unused symbols */ \
357 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
358 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200359 *(SORT(___kcrctab_unused_gpl+*)) \
Arjan van de Venf71d20e2006-06-28 04:26:45 -0700360 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
361 } \
362 \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800363 /* Kernel symbol table: GPL-future-only symbols */ \
364 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
365 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
Alessio Igor Boganif02e8a62011-04-14 14:59:39 +0200366 *(SORT(___kcrctab_gpl_future+*)) \
Greg Kroah-Hartman9f28bb72006-03-20 13:17:13 -0800367 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
368 } \
369 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 /* Kernel symbol table: strings */ \
371 __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
372 *(__ksymtab_strings) \
373 } \
374 \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100375 /* __*init sections */ \
376 __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100377 *(.ref.rodata) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100378 MEM_KEEP(init.rodata) \
379 MEM_KEEP(exit.rodata) \
380 } \
381 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 /* Built-in module parameters. */ \
383 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
384 VMLINUX_SYMBOL(__start___param) = .; \
385 *(__param) \
386 VMLINUX_SYMBOL(__stop___param) = .; \
Dmitry Torokhove94965e2010-12-15 14:00:19 -0800387 } \
388 \
389 /* Built-in module versions. */ \
390 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
391 VMLINUX_SYMBOL(__start___modver) = .; \
392 *(__modver) \
393 VMLINUX_SYMBOL(__stop___modver) = .; \
Arjan van de Venedeed302008-01-30 13:34:08 +0100394 . = ALIGN((align)); \
Vivek Goyal65695802006-12-07 02:14:03 +0100395 VMLINUX_SYMBOL(__end_rodata) = .; \
Marcelo Tosatti7583ddf2006-09-27 01:51:02 -0700396 } \
Sam Ravnborg4096b462007-05-29 21:29:00 +0200397 . = ALIGN((align));
398
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200399/* RODATA & RO_DATA provided for backward compatibility.
Sam Ravnborg4096b462007-05-29 21:29:00 +0200400 * All archs are supposed to use RO_DATA() */
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200401#define RODATA RO_DATA_SECTION(4096)
402#define RO_DATA(align) RO_DATA_SECTION(align)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404#define SECURITY_INIT \
Eric W. Biederman60bad7f2005-06-25 14:57:46 -0700405 .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 VMLINUX_SYMBOL(__security_initcall_start) = .; \
407 *(.security_initcall.init) \
408 VMLINUX_SYMBOL(__security_initcall_end) = .; \
409 }
410
Sam Ravnborg76647092007-05-13 00:31:33 +0200411/* .text section. Map to function alignment to avoid address changes
412 * during second ld run in second ld pass when generating System.map */
413#define TEXT_TEXT \
414 ALIGN_FUNCTION(); \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100415 *(.text.hot) \
Ard Biesheuvel779c88c2015-03-24 10:39:10 +0100416 *(.text .text.fixup) \
Sam Ravnborg312b1482008-01-28 20:21:15 +0100417 *(.ref.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100418 MEM_KEEP(init.text) \
Jan Beulichfb5e2b32008-06-18 12:36:01 +0100419 MEM_KEEP(exit.text) \
420 *(.text.unlikely)
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100421
Sam Ravnborg76647092007-05-13 00:31:33 +0200422
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000423/* sched.text is aling to function alignment to secure we have same
424 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425#define SCHED_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000426 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 VMLINUX_SYMBOL(__sched_text_start) = .; \
428 *(.sched.text) \
429 VMLINUX_SYMBOL(__sched_text_end) = .;
430
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000431/* spinlock.text is aling to function alignment to secure we have same
432 * address even at second ld pass when generating System.map */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433#define LOCK_TEXT \
Sam Ravnborg6d30e3a2005-07-14 20:15:44 +0000434 ALIGN_FUNCTION(); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 VMLINUX_SYMBOL(__lock_text_start) = .; \
436 *(.spinlock.text) \
437 VMLINUX_SYMBOL(__lock_text_end) = .;
Prasanna S Panchamukhid0aaff92005-09-06 15:19:26 -0700438
439#define KPROBES_TEXT \
440 ALIGN_FUNCTION(); \
441 VMLINUX_SYMBOL(__kprobes_text_start) = .; \
442 *(.kprobes.text) \
443 VMLINUX_SYMBOL(__kprobes_text_end) = .;
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200444
Jiri Olsaea714542011-03-07 19:10:39 +0100445#define ENTRY_TEXT \
446 ALIGN_FUNCTION(); \
447 VMLINUX_SYMBOL(__entry_text_start) = .; \
448 *(.entry.text) \
449 VMLINUX_SYMBOL(__entry_text_end) = .;
450
Frederic Weisbeckera0343e82008-12-09 23:53:16 +0100451#ifdef CONFIG_FUNCTION_GRAPH_TRACER
452#define IRQENTRY_TEXT \
453 ALIGN_FUNCTION(); \
454 VMLINUX_SYMBOL(__irqentry_text_start) = .; \
455 *(.irqentry.text) \
456 VMLINUX_SYMBOL(__irqentry_text_end) = .;
457#else
458#define IRQENTRY_TEXT
459#endif
460
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100461/* Section used for early init (in .S files) */
Sam Ravnborg7923f902009-06-14 22:10:41 +0200462#define HEAD_TEXT *(.head.text)
Sam Ravnborg37c514e2008-02-19 21:00:18 +0100463
Sam Ravnborg7923f902009-06-14 22:10:41 +0200464#define HEAD_TEXT_SECTION \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200465 .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) { \
466 HEAD_TEXT \
467 }
468
469/*
470 * Exception table
471 */
472#define EXCEPTION_TABLE(align) \
473 . = ALIGN(align); \
474 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
475 VMLINUX_SYMBOL(__start___ex_table) = .; \
476 *(__ex_table) \
477 VMLINUX_SYMBOL(__stop___ex_table) = .; \
478 }
479
480/*
481 * Init task
482 */
Tim Abbott39a449d2009-06-23 18:53:15 -0400483#define INIT_TASK_DATA_SECTION(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200484 . = ALIGN(align); \
Sam Ravnborgda5e37e2010-07-13 11:39:42 +0200485 .data..init_task : AT(ADDR(.data..init_task) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400486 INIT_TASK_DATA(align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200487 }
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100488
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700489#ifdef CONFIG_CONSTRUCTORS
Heiko Carstens2a2325e2009-06-30 11:41:13 -0700490#define KERNEL_CTORS() . = ALIGN(8); \
491 VMLINUX_SYMBOL(__ctors_start) = .; \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700492 *(.ctors) \
Andrey Ryabinin9ddf8252015-02-13 14:40:10 -0800493 *(SORT(.init_array.*)) \
Frantisek Hrbataeb3057d2013-10-14 18:08:46 +1030494 *(.init_array) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700495 VMLINUX_SYMBOL(__ctors_end) = .;
496#else
497#define KERNEL_CTORS()
498#endif
499
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100500/* init and exit section handling */
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100501#define INIT_DATA \
502 *(.init.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100503 MEM_DISCARD(init.data) \
Peter Oberparleiterb99b87f2009-06-17 16:28:03 -0700504 KERNEL_CTORS() \
John Reiser4b3b4c52009-07-27 11:23:50 -0700505 MCOUNT_REC() \
Steven Rostedt9fd49322012-04-24 22:32:06 -0400506 *(.init.rodata) \
Steven Rostedte4a9ea52011-01-27 09:15:30 -0500507 FTRACE_EVENTS() \
Steven Rostedt3d56e332011-02-02 17:06:09 -0500508 TRACE_SYSCALLS() \
Masami Hiramatsu376e2422014-04-17 17:17:05 +0900509 KPROBE_BLACKLIST() \
Dirk Brandewieaab94332010-12-22 11:57:26 -0800510 MEM_DISCARD(init.rodata) \
Prashant Gaikwadf2f6c252013-01-04 12:30:52 +0530511 CLK_OF_TABLES() \
Marek Szyprowskif618c472014-02-28 14:42:49 +0100512 RESERVEDMEM_OF_TABLES() \
Stephen Warrenae278a92012-11-19 16:41:20 -0700513 CLKSRC_OF_TABLES() \
Will Deacon1cd076b2014-08-27 14:40:58 +0100514 IOMMU_OF_TABLES() \
Stephen Boyd6c3ff8b2013-10-30 18:21:09 -0700515 CPU_METHOD_OF_TABLES() \
Daniel Lezcano449e0562015-02-02 16:32:45 +0100516 CPUIDLE_METHOD_OF_TABLES() \
Thomas Petazzonif6e916b2012-11-20 23:00:52 +0100517 KERNEL_DTB() \
Rob Herringb0b6abd2014-03-27 08:06:16 -0500518 IRQCHIP_OF_MATCH_TABLE() \
Peter Hurley470ca0d2015-03-09 16:27:21 -0400519 EARLYCON_TABLE() \
Rob Herringb0b6abd2014-03-27 08:06:16 -0500520 EARLYCON_OF_TABLES()
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100521
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100522#define INIT_TEXT \
523 *(.init.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100524 MEM_DISCARD(init.text)
525
526#define EXIT_DATA \
527 *(.exit.data) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100528 MEM_DISCARD(exit.data) \
529 MEM_DISCARD(exit.rodata)
530
531#define EXIT_TEXT \
532 *(.exit.text) \
Sam Ravnborgeb8f6892008-01-20 20:07:28 +0100533 MEM_DISCARD(exit.text)
Sam Ravnborg01ba2bd2008-01-20 14:15:03 +0100534
Sam Ravnborg7923f902009-06-14 22:10:41 +0200535#define EXIT_CALL \
536 *(.exitcall.exit)
537
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200538/*
539 * bss (Block Started by Symbol) - uninitialized data
540 * zeroed during startup
541 */
Tim Abbott04e448d2009-07-12 18:23:33 -0400542#define SBSS(sbss_align) \
543 . = ALIGN(sbss_align); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200544 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
545 *(.sbss) \
546 *(.scommon) \
547 }
548
David Daneyc87728c2012-08-14 11:08:00 -0700549/*
550 * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
551 * sections to the front of bss.
552 */
553#ifndef BSS_FIRST_SECTIONS
554#define BSS_FIRST_SECTIONS
555#endif
556
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200557#define BSS(bss_align) \
558 . = ALIGN(bss_align); \
559 .bss : AT(ADDR(.bss) - LOAD_OFFSET) { \
David Daneyc87728c2012-08-14 11:08:00 -0700560 BSS_FIRST_SECTIONS \
Tim Abbott7c74df02010-02-20 01:03:38 +0100561 *(.bss..page_aligned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200562 *(.dynbss) \
563 *(.bss) \
564 *(COMMON) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200565 }
566
567/*
568 * DWARF debug sections.
569 * Symbols in the DWARF debugging sections are relative to
570 * the beginning of the section so we begin them at 0.
571 */
Paolo 'Blaisorblade' Giarrussoa7d0c212005-09-10 19:44:54 +0200572#define DWARF_DEBUG \
573 /* DWARF 1 */ \
574 .debug 0 : { *(.debug) } \
575 .line 0 : { *(.line) } \
576 /* GNU DWARF 1 extensions */ \
577 .debug_srcinfo 0 : { *(.debug_srcinfo) } \
578 .debug_sfnames 0 : { *(.debug_sfnames) } \
579 /* DWARF 1.1 and DWARF 2 */ \
580 .debug_aranges 0 : { *(.debug_aranges) } \
581 .debug_pubnames 0 : { *(.debug_pubnames) } \
582 /* DWARF 2 */ \
583 .debug_info 0 : { *(.debug_info \
584 .gnu.linkonce.wi.*) } \
585 .debug_abbrev 0 : { *(.debug_abbrev) } \
586 .debug_line 0 : { *(.debug_line) } \
587 .debug_frame 0 : { *(.debug_frame) } \
588 .debug_str 0 : { *(.debug_str) } \
589 .debug_loc 0 : { *(.debug_loc) } \
590 .debug_macinfo 0 : { *(.debug_macinfo) } \
591 /* SGI/MIPS DWARF 2 extensions */ \
592 .debug_weaknames 0 : { *(.debug_weaknames) } \
593 .debug_funcnames 0 : { *(.debug_funcnames) } \
594 .debug_typenames 0 : { *(.debug_typenames) } \
595 .debug_varnames 0 : { *(.debug_varnames) } \
596
597 /* Stabs debugging sections. */
598#define STABS_DEBUG \
599 .stab 0 : { *(.stab) } \
600 .stabstr 0 : { *(.stabstr) } \
601 .stab.excl 0 : { *(.stab.excl) } \
602 .stab.exclstr 0 : { *(.stab.exclstr) } \
603 .stab.index 0 : { *(.stab.index) } \
604 .stab.indexstr 0 : { *(.stab.indexstr) } \
605 .comment 0 : { *(.comment) }
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700606
Jan Beulich6360b1f2008-05-12 15:44:41 +0200607#ifdef CONFIG_GENERIC_BUG
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800608#define BUG_TABLE \
609 . = ALIGN(8); \
610 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700611 VMLINUX_SYMBOL(__start___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800612 *(__bug_table) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700613 VMLINUX_SYMBOL(__stop___bug_table) = .; \
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800614 }
Jan Beulich6360b1f2008-05-12 15:44:41 +0200615#else
616#define BUG_TABLE
617#endif
Jeremy Fitzhardinge7664c5a2006-12-08 02:36:19 -0800618
Jan Beulich63687a52008-05-12 15:44:41 +0200619#ifdef CONFIG_PM_TRACE
620#define TRACEDATA \
621 . = ALIGN(4); \
622 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700623 VMLINUX_SYMBOL(__tracedata_start) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200624 *(.tracedata) \
Yoshinori Satoc6de00262008-07-31 00:07:29 -0700625 VMLINUX_SYMBOL(__tracedata_end) = .; \
Jan Beulich63687a52008-05-12 15:44:41 +0200626 }
627#else
628#define TRACEDATA
629#endif
630
Jeremy Fitzhardinge9c9b8b32006-09-25 23:32:26 -0700631#define NOTES \
Roland McGrathcbe87122007-07-19 01:48:36 -0700632 .notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
633 VMLINUX_SYMBOL(__start_notes) = .; \
634 *(.note.*) \
635 VMLINUX_SYMBOL(__stop_notes) = .; \
636 }
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700637
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200638#define INIT_SETUP(initsetup_align) \
639 . = ALIGN(initsetup_align); \
640 VMLINUX_SYMBOL(__setup_start) = .; \
641 *(.init.setup) \
642 VMLINUX_SYMBOL(__setup_end) = .;
643
Pawel Moll026cee02012-03-26 12:50:51 +1030644#define INIT_CALLS_LEVEL(level) \
645 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
646 *(.initcall##level##.init) \
647 *(.initcall##level##s.init) \
Andrew Morton61ce1ef2006-10-27 11:41:44 -0700648
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200649#define INIT_CALLS \
650 VMLINUX_SYMBOL(__initcall_start) = .; \
Pawel Moll026cee02012-03-26 12:50:51 +1030651 *(.initcallearly.init) \
652 INIT_CALLS_LEVEL(0) \
653 INIT_CALLS_LEVEL(1) \
654 INIT_CALLS_LEVEL(2) \
655 INIT_CALLS_LEVEL(3) \
656 INIT_CALLS_LEVEL(4) \
657 INIT_CALLS_LEVEL(5) \
658 INIT_CALLS_LEVEL(rootfs) \
659 INIT_CALLS_LEVEL(6) \
660 INIT_CALLS_LEVEL(7) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200661 VMLINUX_SYMBOL(__initcall_end) = .;
662
663#define CON_INITCALL \
664 VMLINUX_SYMBOL(__con_initcall_start) = .; \
665 *(.con_initcall.init) \
666 VMLINUX_SYMBOL(__con_initcall_end) = .;
667
668#define SECURITY_INITCALL \
669 VMLINUX_SYMBOL(__security_initcall_start) = .; \
670 *(.security_initcall.init) \
671 VMLINUX_SYMBOL(__security_initcall_end) = .;
672
673#ifdef CONFIG_BLK_DEV_INITRD
674#define INIT_RAM_FS \
Mike Frysingerd8826262010-10-26 14:22:30 -0700675 . = ALIGN(4); \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200676 VMLINUX_SYMBOL(__initramfs_start) = .; \
677 *(.init.ramfs) \
Hendrik Bruecknerffe80182010-09-17 15:24:11 -0700678 . = ALIGN(8); \
679 *(.init.ramfs.info)
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200680#else
David Howellseadfe212009-06-22 15:32:31 +0100681#define INIT_RAM_FS
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200682#endif
683
Tejun Heo023bf6f2009-07-09 11:27:40 +0900684/*
685 * Default discarded sections.
686 *
687 * Some archs want to discard exit text/data at runtime rather than
688 * link time due to cross-section references such as alt instructions,
689 * bug table, eh_frame, etc. DISCARDS must be the last of output
690 * section definitions so that such archs put those in earlier section
691 * definitions.
692 */
Tejun Heo405d9672009-06-24 15:13:38 +0900693#define DISCARDS \
694 /DISCARD/ : { \
695 EXIT_TEXT \
696 EXIT_DATA \
Tejun Heo023bf6f2009-07-09 11:27:40 +0900697 EXIT_CALL \
Tejun Heo405d9672009-06-24 15:13:38 +0900698 *(.discard) \
Jeremy Fitzhardingec7f52cd2010-07-22 22:58:01 -0700699 *(.discard.*) \
Tejun Heo405d9672009-06-24 15:13:38 +0900700 }
701
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900702/**
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200703 * PERCPU_INPUT - the percpu input sections
704 * @cacheline: cacheline size
705 *
706 * The core percpu section names and core symbols which do not rely
707 * directly upon load addresses.
708 *
709 * @cacheline is used to align subsections to avoid false cacheline
710 * sharing between subsections for different purposes.
711 */
712#define PERCPU_INPUT(cacheline) \
713 VMLINUX_SYMBOL(__per_cpu_start) = .; \
714 *(.data..percpu..first) \
715 . = ALIGN(PAGE_SIZE); \
716 *(.data..percpu..page_aligned) \
717 . = ALIGN(cacheline); \
Zhengyu He330d2822014-07-01 12:11:47 -0700718 *(.data..percpu..read_mostly) \
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200719 . = ALIGN(cacheline); \
720 *(.data..percpu) \
721 *(.data..percpu..shared_aligned) \
722 VMLINUX_SYMBOL(__per_cpu_end) = .;
723
724/**
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900725 * PERCPU_VADDR - define output section for percpu area
Tejun Heo19df0c22011-01-25 14:26:50 +0100726 * @cacheline: cacheline size
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900727 * @vaddr: explicit base address (optional)
728 * @phdr: destination PHDR (optional)
729 *
Tejun Heo19df0c22011-01-25 14:26:50 +0100730 * Macro which expands to output section for percpu area.
731 *
732 * @cacheline is used to align subsections to avoid false cacheline
733 * sharing between subsections for different purposes.
734 *
735 * If @vaddr is not blank, it specifies explicit base address and all
736 * percpu symbols will be offset from the given address. If blank,
737 * @vaddr always equals @laddr + LOAD_OFFSET.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900738 *
739 * @phdr defines the output PHDR to use if not blank. Be warned that
740 * output PHDR is sticky. If @phdr is specified, the next output
741 * section in the linker script will go there too. @phdr should have
742 * a leading colon.
743 *
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900744 * Note that this macros defines __per_cpu_load as an absolute symbol.
745 * If there is no need to put the percpu section at a predetermined
Tejun Heo0415b00d12011-03-24 18:50:09 +0100746 * address, use PERCPU_SECTION.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900747 */
Tejun Heo19df0c22011-01-25 14:26:50 +0100748#define PERCPU_VADDR(cacheline, vaddr, phdr) \
Ingo Molnardba3d362009-01-29 17:10:12 +0100749 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100750 .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900751 - LOAD_OFFSET) { \
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200752 PERCPU_INPUT(cacheline) \
Tejun Heo6b7c38d2009-01-19 12:21:28 +0900753 } phdr \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100754 . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900755
756/**
Tejun Heo0415b00d12011-03-24 18:50:09 +0100757 * PERCPU_SECTION - define output section for percpu area, simple version
Tejun Heo19df0c22011-01-25 14:26:50 +0100758 * @cacheline: cacheline size
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900759 *
Tejun Heo0415b00d12011-03-24 18:50:09 +0100760 * Align to PAGE_SIZE and outputs output section for percpu area. This
761 * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900762 * __per_cpu_start will be identical.
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900763 *
Tejun Heo0415b00d12011-03-24 18:50:09 +0100764 * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
Tejun Heo19df0c22011-01-25 14:26:50 +0100765 * except that __per_cpu_load is defined as a relative symbol against
766 * .data..percpu which is required for relocatable x86_32 configuration.
Tejun Heo3e5d8f92009-01-13 20:41:35 +0900767 */
Tejun Heo0415b00d12011-03-24 18:50:09 +0100768#define PERCPU_SECTION(cacheline) \
769 . = ALIGN(PAGE_SIZE); \
Denys Vlasenko3d9a8542010-02-20 01:03:43 +0100770 .data..percpu : AT(ADDR(.data..percpu) - LOAD_OFFSET) { \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900771 VMLINUX_SYMBOL(__per_cpu_load) = .; \
Mike Frysinger6ea0c342011-04-04 01:41:32 +0200772 PERCPU_INPUT(cacheline) \
Tejun Heo3ac6cff2009-01-30 16:32:22 +0900773 }
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200774
775
776/*
777 * Definition of the high level *_SECTION macros
778 * They will fit only a subset of the architectures
779 */
780
781
782/*
783 * Writeable data.
784 * All sections are combined in a single .data section.
785 * The sections following CONSTRUCTORS are arranged so their
786 * typical alignment matches.
787 * A cacheline is typical/always less than a PAGE_SIZE so
788 * the sections that has this restriction (or similar)
789 * is located before the ones requiring PAGE_SIZE alignment.
790 * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300791 * matches the requirement of PAGE_ALIGNED_DATA.
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200792 *
Sam Ravnborg7923f902009-06-14 22:10:41 +0200793 * use 0 as page_align if page_aligned data is not used */
Paul Mundt73f1d932009-06-24 01:04:36 +0900794#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200795 . = ALIGN(PAGE_SIZE); \
796 .data : AT(ADDR(.data) - LOAD_OFFSET) { \
Tim Abbott39a449d2009-06-23 18:53:15 -0400797 INIT_TASK_DATA(inittask) \
Tim Abbott1b208622009-09-24 10:36:16 -0400798 NOSAVE_DATA \
799 PAGE_ALIGNED_DATA(pagealigned) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200800 CACHELINE_ALIGNED_DATA(cacheline) \
801 READ_MOSTLY_DATA(cacheline) \
802 DATA_DATA \
803 CONSTRUCTORS \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200804 }
805
806#define INIT_TEXT_SECTION(inittext_align) \
807 . = ALIGN(inittext_align); \
808 .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) { \
809 VMLINUX_SYMBOL(_sinittext) = .; \
810 INIT_TEXT \
811 VMLINUX_SYMBOL(_einittext) = .; \
812 }
813
814#define INIT_DATA_SECTION(initsetup_align) \
815 .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) { \
816 INIT_DATA \
817 INIT_SETUP(initsetup_align) \
818 INIT_CALLS \
819 CON_INITCALL \
820 SECURITY_INITCALL \
821 INIT_RAM_FS \
822 }
823
Tim Abbott04e448d2009-07-12 18:23:33 -0400824#define BSS_SECTION(sbss_align, bss_align, stop_align) \
825 . = ALIGN(sbss_align); \
826 VMLINUX_SYMBOL(__bss_start) = .; \
827 SBSS(sbss_align) \
Sam Ravnborgef53dae2009-06-07 20:46:37 +0200828 BSS(bss_align) \
Tim Abbott04e448d2009-07-12 18:23:33 -0400829 . = ALIGN(stop_align); \
830 VMLINUX_SYMBOL(__bss_stop) = .;