1
2#ifndef _LINUX_LINKAGE_H
3#define _LINUX_LINKAGE_H
4
5#include <linux/compiler_types.h>
6#include <linux/stringify.h>
7#include <linux/export.h>
8#include <asm/linkage.h>
9
10
11#ifndef ASM_NL
12#define ASM_NL ;
13#endif
14
15#ifdef __cplusplus
16#define CPP_ASMLINKAGE extern "C"
17#else
18#define CPP_ASMLINKAGE
19#endif
20
21#ifndef asmlinkage
22#define asmlinkage CPP_ASMLINKAGE
23#endif
24
25#ifndef cond_syscall
26#define cond_syscall(x) asm( \
27 ".weak " __stringify(x) "\n\t" \
28 ".set " __stringify(x) "," \
29 __stringify(sys_ni_syscall))
30#endif
31
32#ifndef SYSCALL_ALIAS
33#define SYSCALL_ALIAS(alias, name) asm( \
34 ".globl " __stringify(alias) "\n\t" \
35 ".set " __stringify(alias) "," \
36 __stringify(name))
37#endif
38
39#define __page_aligned_data __section(".data..page_aligned") __aligned(PAGE_SIZE)
40#define __page_aligned_bss __section(".bss..page_aligned") __aligned(PAGE_SIZE)
41
42
43
44
45
46
47
48#define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
49#define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
50
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63
64
65#ifndef __ASSEMBLY__
66#ifndef asmlinkage_protect
67# define asmlinkage_protect(n, ret, args...) do { } while (0)
68#endif
69#endif
70
71#ifndef __ALIGN
72#define __ALIGN .align 4,0x90
73#define __ALIGN_STR ".align 4,0x90"
74#endif
75
76#ifdef __ASSEMBLY__
77
78
79#ifndef SYM_T_FUNC
80#define SYM_T_FUNC STT_FUNC
81#endif
82
83
84#ifndef SYM_T_OBJECT
85#define SYM_T_OBJECT STT_OBJECT
86#endif
87
88
89#ifndef SYM_T_NONE
90#define SYM_T_NONE STT_NOTYPE
91#endif
92
93
94#define SYM_A_ALIGN ALIGN
95#define SYM_A_NONE
96
97
98#define SYM_L_GLOBAL(name) .globl name
99#define SYM_L_WEAK(name) .weak name
100#define SYM_L_LOCAL(name)
101
102#ifndef LINKER_SCRIPT
103#define ALIGN __ALIGN
104#define ALIGN_STR __ALIGN_STR
105
106
107
108#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
109#ifndef GLOBAL
110
111#define GLOBAL(name) \
112 .globl name ASM_NL \
113 name:
114#endif
115
116#ifndef ENTRY
117
118#define ENTRY(name) \
119 SYM_FUNC_START(name)
120#endif
121#endif
122#endif
123
124#ifndef CONFIG_ARCH_USE_SYM_ANNOTATIONS
125#ifndef WEAK
126
127#define WEAK(name) \
128 SYM_FUNC_START_WEAK(name)
129#endif
130
131#ifndef END
132
133#define END(name) \
134 .size name, .-name
135#endif
136
137
138
139
140
141#ifndef ENDPROC
142
143#define ENDPROC(name) \
144 SYM_FUNC_END(name)
145#endif
146#endif
147
148
149
150
151#ifndef SYM_ENTRY
152#define SYM_ENTRY(name, linkage, align...) \
153 linkage(name) ASM_NL \
154 align ASM_NL \
155 name:
156#endif
157
158
159#ifndef SYM_START
160#define SYM_START(name, linkage, align...) \
161 SYM_ENTRY(name, linkage, align)
162#endif
163
164
165#ifndef SYM_END
166#define SYM_END(name, sym_type) \
167 .type name sym_type ASM_NL \
168 .size name, .-name
169#endif
170
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187
188
189
190#ifndef SYM_INNER_LABEL_ALIGN
191#define SYM_INNER_LABEL_ALIGN(name, linkage) \
192 .type name SYM_T_NONE ASM_NL \
193 SYM_ENTRY(name, linkage, SYM_A_ALIGN)
194#endif
195
196
197#ifndef SYM_INNER_LABEL
198#define SYM_INNER_LABEL(name, linkage) \
199 .type name SYM_T_NONE ASM_NL \
200 SYM_ENTRY(name, linkage, SYM_A_NONE)
201#endif
202
203
204
205
206
207#ifndef SYM_FUNC_START_LOCAL_ALIAS
208#define SYM_FUNC_START_LOCAL_ALIAS(name) \
209 SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
210#endif
211
212
213
214
215
216#ifndef SYM_FUNC_START_ALIAS
217#define SYM_FUNC_START_ALIAS(name) \
218 SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
219#endif
220
221
222#ifndef SYM_FUNC_START
223
224
225
226
227#define SYM_FUNC_START(name) \
228 SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
229#endif
230
231
232#ifndef SYM_FUNC_START_NOALIGN
233#define SYM_FUNC_START_NOALIGN(name) \
234 SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
235#endif
236
237
238#ifndef SYM_FUNC_START_LOCAL
239
240#define SYM_FUNC_START_LOCAL(name) \
241 SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
242#endif
243
244
245#ifndef SYM_FUNC_START_LOCAL_NOALIGN
246#define SYM_FUNC_START_LOCAL_NOALIGN(name) \
247 SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
248#endif
249
250
251#ifndef SYM_FUNC_START_WEAK
252#define SYM_FUNC_START_WEAK(name) \
253 SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)
254#endif
255
256
257#ifndef SYM_FUNC_START_WEAK_NOALIGN
258#define SYM_FUNC_START_WEAK_NOALIGN(name) \
259 SYM_START(name, SYM_L_WEAK, SYM_A_NONE)
260#endif
261
262
263#ifndef SYM_FUNC_END_ALIAS
264#define SYM_FUNC_END_ALIAS(name) \
265 SYM_END(name, SYM_T_FUNC)
266#endif
267
268
269
270
271
272#ifndef SYM_FUNC_END
273
274#define SYM_FUNC_END(name) \
275 SYM_END(name, SYM_T_FUNC)
276#endif
277
278
279#ifndef SYM_CODE_START
280#define SYM_CODE_START(name) \
281 SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)
282#endif
283
284
285#ifndef SYM_CODE_START_NOALIGN
286#define SYM_CODE_START_NOALIGN(name) \
287 SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
288#endif
289
290
291#ifndef SYM_CODE_START_LOCAL
292#define SYM_CODE_START_LOCAL(name) \
293 SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)
294#endif
295
296
297
298
299
300#ifndef SYM_CODE_START_LOCAL_NOALIGN
301#define SYM_CODE_START_LOCAL_NOALIGN(name) \
302 SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
303#endif
304
305
306#ifndef SYM_CODE_END
307#define SYM_CODE_END(name) \
308 SYM_END(name, SYM_T_NONE)
309#endif
310
311
312
313
314#ifndef SYM_DATA_START
315#define SYM_DATA_START(name) \
316 SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)
317#endif
318
319
320#ifndef SYM_DATA_START_LOCAL
321#define SYM_DATA_START_LOCAL(name) \
322 SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)
323#endif
324
325
326#ifndef SYM_DATA_END
327#define SYM_DATA_END(name) \
328 SYM_END(name, SYM_T_OBJECT)
329#endif
330
331
332#ifndef SYM_DATA_END_LABEL
333#define SYM_DATA_END_LABEL(name, linkage, label) \
334 linkage(label) ASM_NL \
335 .type label SYM_T_OBJECT ASM_NL \
336 label: \
337 SYM_END(name, SYM_T_OBJECT)
338#endif
339
340
341#ifndef SYM_DATA
342#define SYM_DATA(name, data...) \
343 SYM_DATA_START(name) ASM_NL \
344 data ASM_NL \
345 SYM_DATA_END(name)
346#endif
347
348
349#ifndef SYM_DATA_LOCAL
350#define SYM_DATA_LOCAL(name, data...) \
351 SYM_DATA_START_LOCAL(name) ASM_NL \
352 data ASM_NL \
353 SYM_DATA_END(name)
354#endif
355
356#endif
357
358#endif
359