ecfc98f053f3e25afafe6759e09510ee748b69c2
[projects/modsched/linux.git] / include / asm-generic / vmlinux.lds.h
1 /*
2  * Helper macros to support writing architecture specific
3  * linker scripts.
4  *
5  * A minimal linker scripts has following content:
6  * [This is a sample, architectures may have special requiriements]
7  *
8  * OUTPUT_FORMAT(...)
9  * OUTPUT_ARCH(...)
10  * ENTRY(...)
11  * SECTIONS
12  * {
13  *      . = START;
14  *      __init_begin = .;
15  *      HEAD_TEXT_SECTION
16  *      INIT_TEXT_SECTION(PAGE_SIZE)
17  *      INIT_DATA_SECTION(...)
18  *      PERCPU_SECTION(CACHELINE_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_SECTION(0, 0, 0)
34  *      _end = .;
35  *
36  *      STABS_DEBUG
37  *      DWARF_DEBUG
38  *
39  *      DISCARDS                // must be the last
40  * }
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  */
50
51 #ifndef LOAD_OFFSET
52 #define LOAD_OFFSET 0
53 #endif
54
55 #include <linux/export.h>
56
57 /* Align . to a 8 byte boundary equals to maximum function alignment. */
58 #define ALIGN_FUNCTION()  . = ALIGN(8)
59
60 /*
61  * Align to a 32 byte boundary equal to the
62  * alignment gcc 4.5 uses for a struct
63  */
64 #define STRUCT_ALIGNMENT 32
65 #define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
66
67 /* 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_CPU
72 #define CPU_KEEP(sec)    *(.cpu##sec)
73 #define CPU_DISCARD(sec)
74 #else
75 #define CPU_KEEP(sec)
76 #define CPU_DISCARD(sec) *(.cpu##sec)
77 #endif
78
79 #if defined(CONFIG_MEMORY_HOTPLUG)
80 #define MEM_KEEP(sec)    *(.mem##sec)
81 #define MEM_DISCARD(sec)
82 #else
83 #define MEM_KEEP(sec)
84 #define MEM_DISCARD(sec) *(.mem##sec)
85 #endif
86
87 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
88 #define MCOUNT_REC()    . = ALIGN(8);                           \
89                         VMLINUX_SYMBOL(__start_mcount_loc) = .; \
90                         *(__mcount_loc)                         \
91                         VMLINUX_SYMBOL(__stop_mcount_loc) = .;
92 #else
93 #define MCOUNT_REC()
94 #endif
95
96 #ifdef CONFIG_TRACE_BRANCH_PROFILING
97 #define LIKELY_PROFILE()        VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
98                                 *(_ftrace_annotated_branch)                           \
99                                 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
100 #else
101 #define LIKELY_PROFILE()
102 #endif
103
104 #ifdef CONFIG_PROFILE_ALL_BRANCHES
105 #define BRANCH_PROFILE()        VMLINUX_SYMBOL(__start_branch_profile) = .;   \
106                                 *(_ftrace_branch)                             \
107                                 VMLINUX_SYMBOL(__stop_branch_profile) = .;
108 #else
109 #define BRANCH_PROFILE()
110 #endif
111
112 #ifdef CONFIG_KPROBES
113 #define KPROBE_BLACKLIST()      . = ALIGN(8);                                 \
114                                 VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
115                                 *(_kprobe_blacklist)                          \
116                                 VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
117 #else
118 #define KPROBE_BLACKLIST()
119 #endif
120
121 #ifdef CONFIG_EVENT_TRACING
122 #define FTRACE_EVENTS() . = ALIGN(8);                                   \
123                         VMLINUX_SYMBOL(__start_ftrace_events) = .;      \
124                         *(_ftrace_events)                               \
125                         VMLINUX_SYMBOL(__stop_ftrace_events) = .;
126 #else
127 #define FTRACE_EVENTS()
128 #endif
129
130 #ifdef CONFIG_TRACING
131 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .;      \
132                          *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
133                          VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
134 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .;  \
135                          *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
136                          VMLINUX_SYMBOL(__stop___tracepoint_str) = .;
137 #else
138 #define TRACE_PRINTKS()
139 #define TRACEPOINT_STR()
140 #endif
141
142 #ifdef CONFIG_FTRACE_SYSCALLS
143 #define TRACE_SYSCALLS() . = ALIGN(8);                                  \
144                          VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
145                          *(__syscalls_metadata)                         \
146                          VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
147 #else
148 #define TRACE_SYSCALLS()
149 #endif
150
151
152 #define ___OF_TABLE(cfg, name)  _OF_TABLE_##cfg(name)
153 #define __OF_TABLE(cfg, name)   ___OF_TABLE(cfg, name)
154 #define OF_TABLE(cfg, name)     __OF_TABLE(config_enabled(cfg), name)
155 #define _OF_TABLE_0(name)
156 #define _OF_TABLE_1(name)                                               \
157         . = ALIGN(8);                                                   \
158         VMLINUX_SYMBOL(__##name##_of_table) = .;                        \
159         *(__##name##_of_table)                                          \
160         *(__##name##_of_table_end)
161
162 #define CLKSRC_OF_TABLES()      OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
163 #define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
164 #define CLK_OF_TABLES()         OF_TABLE(CONFIG_COMMON_CLK, clk)
165 #define RESERVEDMEM_OF_TABLES() OF_TABLE(CONFIG_OF_RESERVED_MEM, reservedmem)
166 #define CPU_METHOD_OF_TABLES()  OF_TABLE(CONFIG_SMP, cpu_method)
167 #define EARLYCON_OF_TABLES()    OF_TABLE(CONFIG_SERIAL_EARLYCON, earlycon)
168
169 #define KERNEL_DTB()                                                    \
170         STRUCT_ALIGN();                                                 \
171         VMLINUX_SYMBOL(__dtb_start) = .;                                \
172         *(.dtb.init.rodata)                                             \
173         VMLINUX_SYMBOL(__dtb_end) = .;
174
175 /* .data section */
176 #define DATA_DATA                                                       \
177         *(.data)                                                        \
178         *(.ref.data)                                                    \
179         *(.data..shared_aligned) /* percpu related */                   \
180         MEM_KEEP(init.data)                                             \
181         MEM_KEEP(exit.data)                                             \
182         *(.data.unlikely)                                               \
183         STRUCT_ALIGN();                                                 \
184         *(__tracepoints)                                                \
185         /* implement dynamic printk debug */                            \
186         . = ALIGN(8);                                                   \
187         VMLINUX_SYMBOL(__start___jump_table) = .;                       \
188         *(__jump_table)                                                 \
189         VMLINUX_SYMBOL(__stop___jump_table) = .;                        \
190         . = ALIGN(8);                                                   \
191         VMLINUX_SYMBOL(__start___verbose) = .;                          \
192         *(__verbose)                                                    \
193         VMLINUX_SYMBOL(__stop___verbose) = .;                           \
194         LIKELY_PROFILE()                                                \
195         BRANCH_PROFILE()                                                \
196         TRACE_PRINTKS()                                                 \
197         TRACEPOINT_STR()
198
199 /*
200  * Data section helpers
201  */
202 #define NOSAVE_DATA                                                     \
203         . = ALIGN(PAGE_SIZE);                                           \
204         VMLINUX_SYMBOL(__nosave_begin) = .;                             \
205         *(.data..nosave)                                                \
206         . = ALIGN(PAGE_SIZE);                                           \
207         VMLINUX_SYMBOL(__nosave_end) = .;
208
209 #define PAGE_ALIGNED_DATA(page_align)                                   \
210         . = ALIGN(page_align);                                          \
211         *(.data..page_aligned)
212
213 #define READ_MOSTLY_DATA(align)                                         \
214         . = ALIGN(align);                                               \
215         *(.data..read_mostly)                                           \
216         . = ALIGN(align);
217
218 #define CACHELINE_ALIGNED_DATA(align)                                   \
219         . = ALIGN(align);                                               \
220         *(.data..cacheline_aligned)
221
222 #define INIT_TASK_DATA(align)                                           \
223         . = ALIGN(align);                                               \
224         *(.data..init_task)
225
226 /*
227  * Read only Data
228  */
229 #define RO_DATA_SECTION(align)                                          \
230         . = ALIGN((align));                                             \
231         .rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {           \
232                 VMLINUX_SYMBOL(__start_rodata) = .;                     \
233                 *(.rodata) *(.rodata.*)                                 \
234                 *(__vermagic)           /* Kernel version magic */      \
235                 . = ALIGN(8);                                           \
236                 VMLINUX_SYMBOL(__start___tracepoints_ptrs) = .;         \
237                 *(__tracepoints_ptrs)   /* Tracepoints: pointer array */\
238                 VMLINUX_SYMBOL(__stop___tracepoints_ptrs) = .;          \
239                 *(__tracepoints_strings)/* Tracepoints: strings */      \
240         }                                                               \
241                                                                         \
242         .rodata1          : AT(ADDR(.rodata1) - LOAD_OFFSET) {          \
243                 *(.rodata1)                                             \
244         }                                                               \
245                                                                         \
246         BUG_TABLE                                                       \
247                                                                         \
248         /* PCI quirks */                                                \
249         .pci_fixup        : AT(ADDR(.pci_fixup) - LOAD_OFFSET) {        \
250                 VMLINUX_SYMBOL(__start_pci_fixups_early) = .;           \
251                 *(.pci_fixup_early)                                     \
252                 VMLINUX_SYMBOL(__end_pci_fixups_early) = .;             \
253                 VMLINUX_SYMBOL(__start_pci_fixups_header) = .;          \
254                 *(.pci_fixup_header)                                    \
255                 VMLINUX_SYMBOL(__end_pci_fixups_header) = .;            \
256                 VMLINUX_SYMBOL(__start_pci_fixups_final) = .;           \
257                 *(.pci_fixup_final)                                     \
258                 VMLINUX_SYMBOL(__end_pci_fixups_final) = .;             \
259                 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .;          \
260                 *(.pci_fixup_enable)                                    \
261                 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .;            \
262                 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .;          \
263                 *(.pci_fixup_resume)                                    \
264                 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .;            \
265                 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .;    \
266                 *(.pci_fixup_resume_early)                              \
267                 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .;      \
268                 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .;         \
269                 *(.pci_fixup_suspend)                                   \
270                 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .;           \
271         }                                                               \
272                                                                         \
273         /* Built-in firmware blobs */                                   \
274         .builtin_fw        : AT(ADDR(.builtin_fw) - LOAD_OFFSET) {      \
275                 VMLINUX_SYMBOL(__start_builtin_fw) = .;                 \
276                 *(.builtin_fw)                                          \
277                 VMLINUX_SYMBOL(__end_builtin_fw) = .;                   \
278         }                                                               \
279                                                                         \
280         TRACEDATA                                                       \
281                                                                         \
282         /* Kernel symbol table: Normal symbols */                       \
283         __ksymtab         : AT(ADDR(__ksymtab) - LOAD_OFFSET) {         \
284                 VMLINUX_SYMBOL(__start___ksymtab) = .;                  \
285                 *(SORT(___ksymtab+*))                                   \
286                 VMLINUX_SYMBOL(__stop___ksymtab) = .;                   \
287         }                                                               \
288                                                                         \
289         /* Kernel symbol table: GPL-only symbols */                     \
290         __ksymtab_gpl     : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) {     \
291                 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .;              \
292                 *(SORT(___ksymtab_gpl+*))                               \
293                 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .;               \
294         }                                                               \
295                                                                         \
296         /* Kernel symbol table: Normal unused symbols */                \
297         __ksymtab_unused  : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) {  \
298                 VMLINUX_SYMBOL(__start___ksymtab_unused) = .;           \
299                 *(SORT(___ksymtab_unused+*))                            \
300                 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .;            \
301         }                                                               \
302                                                                         \
303         /* Kernel symbol table: GPL-only unused symbols */              \
304         __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
305                 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .;       \
306                 *(SORT(___ksymtab_unused_gpl+*))                        \
307                 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .;        \
308         }                                                               \
309                                                                         \
310         /* Kernel symbol table: GPL-future-only symbols */              \
311         __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
312                 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .;       \
313                 *(SORT(___ksymtab_gpl_future+*))                        \
314                 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .;        \
315         }                                                               \
316                                                                         \
317         /* Kernel symbol table: Normal symbols */                       \
318         __kcrctab         : AT(ADDR(__kcrctab) - LOAD_OFFSET) {         \
319                 VMLINUX_SYMBOL(__start___kcrctab) = .;                  \
320                 *(SORT(___kcrctab+*))                                   \
321                 VMLINUX_SYMBOL(__stop___kcrctab) = .;                   \
322         }                                                               \
323                                                                         \
324         /* Kernel symbol table: GPL-only symbols */                     \
325         __kcrctab_gpl     : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) {     \
326                 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .;              \
327                 *(SORT(___kcrctab_gpl+*))                               \
328                 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .;               \
329         }                                                               \
330                                                                         \
331         /* Kernel symbol table: Normal unused symbols */                \
332         __kcrctab_unused  : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) {  \
333                 VMLINUX_SYMBOL(__start___kcrctab_unused) = .;           \
334                 *(SORT(___kcrctab_unused+*))                            \
335                 VMLINUX_SYMBOL(__stop___kcrctab_unused) = .;            \
336         }                                                               \
337                                                                         \
338         /* Kernel symbol table: GPL-only unused symbols */              \
339         __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
340                 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .;       \
341                 *(SORT(___kcrctab_unused_gpl+*))                        \
342                 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .;        \
343         }                                                               \
344                                                                         \
345         /* Kernel symbol table: GPL-future-only symbols */              \
346         __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
347                 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .;       \
348                 *(SORT(___kcrctab_gpl_future+*))                        \
349                 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .;        \
350         }                                                               \
351                                                                         \
352         /* Kernel symbol table: strings */                              \
353         __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
354                 *(__ksymtab_strings)                                    \
355         }                                                               \
356                                                                         \
357         /* __*init sections */                                          \
358         __init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) {         \
359                 *(.ref.rodata)                                          \
360                 MEM_KEEP(init.rodata)                                   \
361                 MEM_KEEP(exit.rodata)                                   \
362         }                                                               \
363                                                                         \
364         /* Built-in module parameters. */                               \
365         __param : AT(ADDR(__param) - LOAD_OFFSET) {                     \
366                 VMLINUX_SYMBOL(__start___param) = .;                    \
367                 *(__param)                                              \
368                 VMLINUX_SYMBOL(__stop___param) = .;                     \
369         }                                                               \
370                                                                         \
371         /* Built-in module versions. */                                 \
372         __modver : AT(ADDR(__modver) - LOAD_OFFSET) {                   \
373                 VMLINUX_SYMBOL(__start___modver) = .;                   \
374                 *(__modver)                                             \
375                 VMLINUX_SYMBOL(__stop___modver) = .;                    \
376                 . = ALIGN((align));                                     \
377                 VMLINUX_SYMBOL(__end_rodata) = .;                       \
378         }                                                               \
379         . = ALIGN((align));
380
381 /* RODATA & RO_DATA provided for backward compatibility.
382  * All archs are supposed to use RO_DATA() */
383 #define RODATA          RO_DATA_SECTION(4096)
384 #define RO_DATA(align)  RO_DATA_SECTION(align)
385
386 #define SECURITY_INIT                                                   \
387         .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
388                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
389                 *(.security_initcall.init)                              \
390                 VMLINUX_SYMBOL(__security_initcall_end) = .;            \
391         }
392
393 /* .text section. Map to function alignment to avoid address changes
394  * during second ld run in second ld pass when generating System.map */
395 #define TEXT_TEXT                                                       \
396                 ALIGN_FUNCTION();                                       \
397                 *(.text.hot)                                            \
398                 *(.text)                                                \
399                 *(.ref.text)                                            \
400         MEM_KEEP(init.text)                                             \
401         MEM_KEEP(exit.text)                                             \
402                 *(.text.unlikely)
403
404
405 /* sched.text is aling to function alignment to secure we have same
406  * address even at second ld pass when generating System.map */
407 #define SCHED_TEXT                                                      \
408                 ALIGN_FUNCTION();                                       \
409                 VMLINUX_SYMBOL(__sched_text_start) = .;                 \
410                 *(.sched.text)                                          \
411                 VMLINUX_SYMBOL(__sched_text_end) = .;
412
413 /* spinlock.text is aling to function alignment to secure we have same
414  * address even at second ld pass when generating System.map */
415 #define LOCK_TEXT                                                       \
416                 ALIGN_FUNCTION();                                       \
417                 VMLINUX_SYMBOL(__lock_text_start) = .;                  \
418                 *(.spinlock.text)                                       \
419                 VMLINUX_SYMBOL(__lock_text_end) = .;
420
421 #define KPROBES_TEXT                                                    \
422                 ALIGN_FUNCTION();                                       \
423                 VMLINUX_SYMBOL(__kprobes_text_start) = .;               \
424                 *(.kprobes.text)                                        \
425                 VMLINUX_SYMBOL(__kprobes_text_end) = .;
426
427 #define ENTRY_TEXT                                                      \
428                 ALIGN_FUNCTION();                                       \
429                 VMLINUX_SYMBOL(__entry_text_start) = .;                 \
430                 *(.entry.text)                                          \
431                 VMLINUX_SYMBOL(__entry_text_end) = .;
432
433 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
434 #define IRQENTRY_TEXT                                                   \
435                 ALIGN_FUNCTION();                                       \
436                 VMLINUX_SYMBOL(__irqentry_text_start) = .;              \
437                 *(.irqentry.text)                                       \
438                 VMLINUX_SYMBOL(__irqentry_text_end) = .;
439 #else
440 #define IRQENTRY_TEXT
441 #endif
442
443 /* Section used for early init (in .S files) */
444 #define HEAD_TEXT  *(.head.text)
445
446 #define HEAD_TEXT_SECTION                                                       \
447         .head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {               \
448                 HEAD_TEXT                                               \
449         }
450
451 /*
452  * Exception table
453  */
454 #define EXCEPTION_TABLE(align)                                          \
455         . = ALIGN(align);                                               \
456         __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {               \
457                 VMLINUX_SYMBOL(__start___ex_table) = .;                 \
458                 *(__ex_table)                                           \
459                 VMLINUX_SYMBOL(__stop___ex_table) = .;                  \
460         }
461
462 /*
463  * Init task
464  */
465 #define INIT_TASK_DATA_SECTION(align)                                   \
466         . = ALIGN(align);                                               \
467         .data..init_task :  AT(ADDR(.data..init_task) - LOAD_OFFSET) {  \
468                 INIT_TASK_DATA(align)                                   \
469         }
470
471 #ifdef CONFIG_CONSTRUCTORS
472 #define KERNEL_CTORS()  . = ALIGN(8);                      \
473                         VMLINUX_SYMBOL(__ctors_start) = .; \
474                         *(.ctors)                          \
475                         *(.init_array)                     \
476                         VMLINUX_SYMBOL(__ctors_end) = .;
477 #else
478 #define KERNEL_CTORS()
479 #endif
480
481 /* init and exit section handling */
482 #define INIT_DATA                                                       \
483         *(.init.data)                                                   \
484         MEM_DISCARD(init.data)                                          \
485         KERNEL_CTORS()                                                  \
486         MCOUNT_REC()                                                    \
487         *(.init.rodata)                                                 \
488         FTRACE_EVENTS()                                                 \
489         TRACE_SYSCALLS()                                                \
490         KPROBE_BLACKLIST()                                              \
491         MEM_DISCARD(init.rodata)                                        \
492         CLK_OF_TABLES()                                                 \
493         RESERVEDMEM_OF_TABLES()                                         \
494         CLKSRC_OF_TABLES()                                              \
495         CPU_METHOD_OF_TABLES()                                          \
496         KERNEL_DTB()                                                    \
497         IRQCHIP_OF_MATCH_TABLE()                                        \
498         EARLYCON_OF_TABLES()
499
500 #define INIT_TEXT                                                       \
501         *(.init.text)                                                   \
502         MEM_DISCARD(init.text)
503
504 #define EXIT_DATA                                                       \
505         *(.exit.data)                                                   \
506         MEM_DISCARD(exit.data)                                          \
507         MEM_DISCARD(exit.rodata)
508
509 #define EXIT_TEXT                                                       \
510         *(.exit.text)                                                   \
511         MEM_DISCARD(exit.text)
512
513 #define EXIT_CALL                                                       \
514         *(.exitcall.exit)
515
516 /*
517  * bss (Block Started by Symbol) - uninitialized data
518  * zeroed during startup
519  */
520 #define SBSS(sbss_align)                                                \
521         . = ALIGN(sbss_align);                                          \
522         .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {                         \
523                 *(.sbss)                                                \
524                 *(.scommon)                                             \
525         }
526
527 /*
528  * Allow archectures to redefine BSS_FIRST_SECTIONS to add extra
529  * sections to the front of bss.
530  */
531 #ifndef BSS_FIRST_SECTIONS
532 #define BSS_FIRST_SECTIONS
533 #endif
534
535 #define BSS(bss_align)                                                  \
536         . = ALIGN(bss_align);                                           \
537         .bss : AT(ADDR(.bss) - LOAD_OFFSET) {                           \
538                 BSS_FIRST_SECTIONS                                      \
539                 *(.bss..page_aligned)                                   \
540                 *(.dynbss)                                              \
541                 *(.bss)                                                 \
542                 *(COMMON)                                               \
543         }
544
545 /*
546  * DWARF debug sections.
547  * Symbols in the DWARF debugging sections are relative to
548  * the beginning of the section so we begin them at 0.
549  */
550 #define DWARF_DEBUG                                                     \
551                 /* DWARF 1 */                                           \
552                 .debug          0 : { *(.debug) }                       \
553                 .line           0 : { *(.line) }                        \
554                 /* GNU DWARF 1 extensions */                            \
555                 .debug_srcinfo  0 : { *(.debug_srcinfo) }               \
556                 .debug_sfnames  0 : { *(.debug_sfnames) }               \
557                 /* DWARF 1.1 and DWARF 2 */                             \
558                 .debug_aranges  0 : { *(.debug_aranges) }               \
559                 .debug_pubnames 0 : { *(.debug_pubnames) }              \
560                 /* DWARF 2 */                                           \
561                 .debug_info     0 : { *(.debug_info                     \
562                                 .gnu.linkonce.wi.*) }                   \
563                 .debug_abbrev   0 : { *(.debug_abbrev) }                \
564                 .debug_line     0 : { *(.debug_line) }                  \
565                 .debug_frame    0 : { *(.debug_frame) }                 \
566                 .debug_str      0 : { *(.debug_str) }                   \
567                 .debug_loc      0 : { *(.debug_loc) }                   \
568                 .debug_macinfo  0 : { *(.debug_macinfo) }               \
569                 /* SGI/MIPS DWARF 2 extensions */                       \
570                 .debug_weaknames 0 : { *(.debug_weaknames) }            \
571                 .debug_funcnames 0 : { *(.debug_funcnames) }            \
572                 .debug_typenames 0 : { *(.debug_typenames) }            \
573                 .debug_varnames  0 : { *(.debug_varnames) }             \
574
575                 /* Stabs debugging sections.  */
576 #define STABS_DEBUG                                                     \
577                 .stab 0 : { *(.stab) }                                  \
578                 .stabstr 0 : { *(.stabstr) }                            \
579                 .stab.excl 0 : { *(.stab.excl) }                        \
580                 .stab.exclstr 0 : { *(.stab.exclstr) }                  \
581                 .stab.index 0 : { *(.stab.index) }                      \
582                 .stab.indexstr 0 : { *(.stab.indexstr) }                \
583                 .comment 0 : { *(.comment) }
584
585 #ifdef CONFIG_GENERIC_BUG
586 #define BUG_TABLE                                                       \
587         . = ALIGN(8);                                                   \
588         __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) {             \
589                 VMLINUX_SYMBOL(__start___bug_table) = .;                \
590                 *(__bug_table)                                          \
591                 VMLINUX_SYMBOL(__stop___bug_table) = .;                 \
592         }
593 #else
594 #define BUG_TABLE
595 #endif
596
597 #ifdef CONFIG_PM_TRACE
598 #define TRACEDATA                                                       \
599         . = ALIGN(4);                                                   \
600         .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) {               \
601                 VMLINUX_SYMBOL(__tracedata_start) = .;                  \
602                 *(.tracedata)                                           \
603                 VMLINUX_SYMBOL(__tracedata_end) = .;                    \
604         }
605 #else
606 #define TRACEDATA
607 #endif
608
609 #define NOTES                                                           \
610         .notes : AT(ADDR(.notes) - LOAD_OFFSET) {                       \
611                 VMLINUX_SYMBOL(__start_notes) = .;                      \
612                 *(.note.*)                                              \
613                 VMLINUX_SYMBOL(__stop_notes) = .;                       \
614         }
615
616 #define INIT_SETUP(initsetup_align)                                     \
617                 . = ALIGN(initsetup_align);                             \
618                 VMLINUX_SYMBOL(__setup_start) = .;                      \
619                 *(.init.setup)                                          \
620                 VMLINUX_SYMBOL(__setup_end) = .;
621
622 #define INIT_CALLS_LEVEL(level)                                         \
623                 VMLINUX_SYMBOL(__initcall##level##_start) = .;          \
624                 *(.initcall##level##.init)                              \
625                 *(.initcall##level##s.init)                             \
626
627 #define INIT_CALLS                                                      \
628                 VMLINUX_SYMBOL(__initcall_start) = .;                   \
629                 *(.initcallearly.init)                                  \
630                 INIT_CALLS_LEVEL(0)                                     \
631                 INIT_CALLS_LEVEL(1)                                     \
632                 INIT_CALLS_LEVEL(2)                                     \
633                 INIT_CALLS_LEVEL(3)                                     \
634                 INIT_CALLS_LEVEL(4)                                     \
635                 INIT_CALLS_LEVEL(5)                                     \
636                 INIT_CALLS_LEVEL(rootfs)                                \
637                 INIT_CALLS_LEVEL(6)                                     \
638                 INIT_CALLS_LEVEL(7)                                     \
639                 VMLINUX_SYMBOL(__initcall_end) = .;
640
641 #define CON_INITCALL                                                    \
642                 VMLINUX_SYMBOL(__con_initcall_start) = .;               \
643                 *(.con_initcall.init)                                   \
644                 VMLINUX_SYMBOL(__con_initcall_end) = .;
645
646 #define SECURITY_INITCALL                                               \
647                 VMLINUX_SYMBOL(__security_initcall_start) = .;          \
648                 *(.security_initcall.init)                              \
649                 VMLINUX_SYMBOL(__security_initcall_end) = .;
650
651 #ifdef CONFIG_MOD_SCHED
652 #define COBAS_INITCALL                                                  \
653                 VMLINUX_SYMBOL(__fw_modules_init_start) = .;            \
654                 *(.fw.modules.init)                                     \
655                 VMLINUX_SYMBOL(__fw_modules_init_end) = .;
656 #else
657 #define COBAS_INITCALL
658 #endif
659
660 #ifdef CONFIG_BLK_DEV_INITRD
661 #define INIT_RAM_FS                                                     \
662         . = ALIGN(4);                                                   \
663         VMLINUX_SYMBOL(__initramfs_start) = .;                          \
664         *(.init.ramfs)                                                  \
665         . = ALIGN(8);                                                   \
666         *(.init.ramfs.info)
667 #else
668 #define INIT_RAM_FS
669 #endif
670
671 /*
672  * Default discarded sections.
673  *
674  * Some archs want to discard exit text/data at runtime rather than
675  * link time due to cross-section references such as alt instructions,
676  * bug table, eh_frame, etc.  DISCARDS must be the last of output
677  * section definitions so that such archs put those in earlier section
678  * definitions.
679  */
680 #define DISCARDS                                                        \
681         /DISCARD/ : {                                                   \
682         EXIT_TEXT                                                       \
683         EXIT_DATA                                                       \
684         EXIT_CALL                                                       \
685         *(.discard)                                                     \
686         *(.discard.*)                                                   \
687         }
688
689 /**
690  * PERCPU_INPUT - the percpu input sections
691  * @cacheline: cacheline size
692  *
693  * The core percpu section names and core symbols which do not rely
694  * directly upon load addresses.
695  *
696  * @cacheline is used to align subsections to avoid false cacheline
697  * sharing between subsections for different purposes.
698  */
699 #define PERCPU_INPUT(cacheline)                                         \
700         VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
701         *(.data..percpu..first)                                         \
702         . = ALIGN(PAGE_SIZE);                                           \
703         *(.data..percpu..page_aligned)                                  \
704         . = ALIGN(cacheline);                                           \
705         *(.data..percpu..read_mostly)                                   \
706         . = ALIGN(cacheline);                                           \
707         *(.data..percpu)                                                \
708         *(.data..percpu..shared_aligned)                                \
709         VMLINUX_SYMBOL(__per_cpu_end) = .;
710
711 /**
712  * PERCPU_VADDR - define output section for percpu area
713  * @cacheline: cacheline size
714  * @vaddr: explicit base address (optional)
715  * @phdr: destination PHDR (optional)
716  *
717  * Macro which expands to output section for percpu area.
718  *
719  * @cacheline is used to align subsections to avoid false cacheline
720  * sharing between subsections for different purposes.
721  *
722  * If @vaddr is not blank, it specifies explicit base address and all
723  * percpu symbols will be offset from the given address.  If blank,
724  * @vaddr always equals @laddr + LOAD_OFFSET.
725  *
726  * @phdr defines the output PHDR to use if not blank.  Be warned that
727  * output PHDR is sticky.  If @phdr is specified, the next output
728  * section in the linker script will go there too.  @phdr should have
729  * a leading colon.
730  *
731  * Note that this macros defines __per_cpu_load as an absolute symbol.
732  * If there is no need to put the percpu section at a predetermined
733  * address, use PERCPU_SECTION.
734  */
735 #define PERCPU_VADDR(cacheline, vaddr, phdr)                            \
736         VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
737         .data..percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)         \
738                                 - LOAD_OFFSET) {                        \
739                 PERCPU_INPUT(cacheline)                                 \
740         } phdr                                                          \
741         . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data..percpu);
742
743 /**
744  * PERCPU_SECTION - define output section for percpu area, simple version
745  * @cacheline: cacheline size
746  *
747  * Align to PAGE_SIZE and outputs output section for percpu area.  This
748  * macro doesn't manipulate @vaddr or @phdr and __per_cpu_load and
749  * __per_cpu_start will be identical.
750  *
751  * This macro is equivalent to ALIGN(PAGE_SIZE); PERCPU_VADDR(@cacheline,,)
752  * except that __per_cpu_load is defined as a relative symbol against
753  * .data..percpu which is required for relocatable x86_32 configuration.
754  */
755 #define PERCPU_SECTION(cacheline)                                       \
756         . = ALIGN(PAGE_SIZE);                                           \
757         .data..percpu   : AT(ADDR(.data..percpu) - LOAD_OFFSET) {       \
758                 VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
759                 PERCPU_INPUT(cacheline)                                 \
760         }
761
762
763 /*
764  * Definition of the high level *_SECTION macros
765  * They will fit only a subset of the architectures
766  */
767
768
769 /*
770  * Writeable data.
771  * All sections are combined in a single .data section.
772  * The sections following CONSTRUCTORS are arranged so their
773  * typical alignment matches.
774  * A cacheline is typical/always less than a PAGE_SIZE so
775  * the sections that has this restriction (or similar)
776  * is located before the ones requiring PAGE_SIZE alignment.
777  * NOSAVE_DATA starts and ends with a PAGE_SIZE alignment which
778  * matches the requirement of PAGE_ALIGNED_DATA.
779  *
780  * use 0 as page_align if page_aligned data is not used */
781 #define RW_DATA_SECTION(cacheline, pagealigned, inittask)               \
782         . = ALIGN(PAGE_SIZE);                                           \
783         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
784                 INIT_TASK_DATA(inittask)                                \
785                 NOSAVE_DATA                                             \
786                 PAGE_ALIGNED_DATA(pagealigned)                          \
787                 CACHELINE_ALIGNED_DATA(cacheline)                       \
788                 READ_MOSTLY_DATA(cacheline)                             \
789                 DATA_DATA                                               \
790                 CONSTRUCTORS                                            \
791         }
792
793 #define INIT_TEXT_SECTION(inittext_align)                               \
794         . = ALIGN(inittext_align);                                      \
795         .init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {               \
796                 VMLINUX_SYMBOL(_sinittext) = .;                         \
797                 INIT_TEXT                                               \
798                 VMLINUX_SYMBOL(_einittext) = .;                         \
799         }
800
801 #define INIT_DATA_SECTION(initsetup_align)                              \
802         .init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {               \
803                 INIT_DATA                                               \
804                 INIT_SETUP(initsetup_align)                             \
805                 INIT_CALLS                                              \
806                 CON_INITCALL                                            \
807                 SECURITY_INITCALL                                       \
808                 COBAS_INITCALL                                  \
809                 INIT_RAM_FS                                             \
810         }
811
812 #define BSS_SECTION(sbss_align, bss_align, stop_align)                  \
813         . = ALIGN(sbss_align);                                          \
814         VMLINUX_SYMBOL(__bss_start) = .;                                \
815         SBSS(sbss_align)                                                \
816         BSS(bss_align)                                                  \
817         . = ALIGN(stop_align);                                          \
818         VMLINUX_SYMBOL(__bss_stop) = .;