1
2#ifndef _LINUX_INIT_H
3#define _LINUX_INIT_H
4
5#include <linux/compiler.h>
6#include <linux/types.h>
7
8
9#if defined(__noretpoline) && !defined(MODULE)
10#define __noinitretpoline __noretpoline
11#else
12#define __noinitretpoline
13#endif
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50#define __init __section(.init.text) __cold __latent_entropy __noinitretpoline
51#define __initdata __section(.init.data)
52#define __initconst __section(.init.rodata)
53#define __exitdata __section(.exit.data)
54#define __exit_call __used __section(.exitcall.exit)
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72
73#define __ref __section(.ref.text) noinline
74#define __refdata __section(.ref.data)
75#define __refconst __section(.ref.rodata)
76
77#ifdef MODULE
78#define __exitused
79#else
80#define __exitused __used
81#endif
82
83#define __exit __section(.exit.text) __exitused __cold notrace
84
85
86#define __meminit __section(.meminit.text) __cold notrace \
87 __latent_entropy
88#define __meminitdata __section(.meminit.data)
89#define __meminitconst __section(.meminit.rodata)
90#define __memexit __section(.memexit.text) __exitused __cold notrace
91#define __memexitdata __section(.memexit.data)
92#define __memexitconst __section(.memexit.rodata)
93
94
95#define __HEAD .section ".head.text","ax"
96#define __INIT .section ".init.text","ax"
97#define __FINIT .previous
98
99#define __INITDATA .section ".init.data","aw",%progbits
100#define __INITRODATA .section ".init.rodata","a",%progbits
101#define __FINITDATA .previous
102
103#define __MEMINIT .section ".meminit.text", "ax"
104#define __MEMINITDATA .section ".meminit.data", "aw"
105#define __MEMINITRODATA .section ".meminit.rodata", "a"
106
107
108#define __REF .section ".ref.text", "ax"
109#define __REFDATA .section ".ref.data", "aw"
110#define __REFCONST .section ".ref.rodata", "a"
111
112#ifndef __ASSEMBLY__
113
114
115
116typedef int (*initcall_t)(void);
117typedef void (*exitcall_t)(void);
118
119extern initcall_t __con_initcall_start[], __con_initcall_end[];
120extern initcall_t __security_initcall_start[], __security_initcall_end[];
121
122
123typedef void (*ctor_fn_t)(void);
124
125
126extern int do_one_initcall(initcall_t fn);
127extern char __initdata boot_command_line[];
128extern char *saved_command_line;
129extern unsigned int reset_devices;
130
131
132void setup_arch(char **);
133void prepare_namespace(void);
134int __init init_rootfs(void);
135
136#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
137extern bool rodata_enabled;
138#endif
139#ifdef CONFIG_STRICT_KERNEL_RWX
140void mark_rodata_ro(void);
141#endif
142
143extern void (*late_time_init)(void);
144
145extern bool initcall_debug;
146
147#endif
148
149#ifndef MODULE
150
151#ifndef __ASSEMBLY__
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169#define __define_initcall(fn, id) \
170 static initcall_t __initcall_##fn##id __used \
171 __attribute__((__section__(".initcall" #id ".init"))) = fn;
172
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177
178#define early_initcall(fn) __define_initcall(fn, early)
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187#define pure_initcall(fn) __define_initcall(fn, 0)
188
189#define core_initcall(fn) __define_initcall(fn, 1)
190#define core_initcall_sync(fn) __define_initcall(fn, 1s)
191#define postcore_initcall(fn) __define_initcall(fn, 2)
192#define postcore_initcall_sync(fn) __define_initcall(fn, 2s)
193#define arch_initcall(fn) __define_initcall(fn, 3)
194#define arch_initcall_sync(fn) __define_initcall(fn, 3s)
195#define subsys_initcall(fn) __define_initcall(fn, 4)
196#define subsys_initcall_sync(fn) __define_initcall(fn, 4s)
197#define fs_initcall(fn) __define_initcall(fn, 5)
198#define fs_initcall_sync(fn) __define_initcall(fn, 5s)
199#define rootfs_initcall(fn) __define_initcall(fn, rootfs)
200#define device_initcall(fn) __define_initcall(fn, 6)
201#define device_initcall_sync(fn) __define_initcall(fn, 6s)
202#define late_initcall(fn) __define_initcall(fn, 7)
203#define late_initcall_sync(fn) __define_initcall(fn, 7s)
204
205#define __initcall(fn) device_initcall(fn)
206
207#define __exitcall(fn) \
208 static exitcall_t __exitcall_##fn __exit_call = fn
209
210#define console_initcall(fn) \
211 static initcall_t __initcall_##fn \
212 __used __section(.con_initcall.init) = fn
213
214#define security_initcall(fn) \
215 static initcall_t __initcall_##fn \
216 __used __section(.security_initcall.init) = fn
217
218struct obs_kernel_param {
219 const char *str;
220 int (*setup_func)(char *);
221 int early;
222};
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229
230#define __setup_param(str, unique_id, fn, early) \
231 static const char __setup_str_##unique_id[] __initconst \
232 __aligned(1) = str; \
233 static struct obs_kernel_param __setup_##unique_id \
234 __used __section(.init.setup) \
235 __attribute__((aligned((sizeof(long))))) \
236 = { __setup_str_##unique_id, fn, early }
237
238#define __setup(str, fn) \
239 __setup_param(str, fn, fn, 0)
240
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244
245#define early_param(str, fn) \
246 __setup_param(str, fn, fn, 1)
247
248#define early_param_on_off(str_on, str_off, var, config) \
249 \
250 int var = IS_ENABLED(config); \
251 \
252 static int __init parse_##var##_on(char *arg) \
253 { \
254 var = 1; \
255 return 0; \
256 } \
257 __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \
258 \
259 static int __init parse_##var##_off(char *arg) \
260 { \
261 var = 0; \
262 return 0; \
263 } \
264 __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
265
266
267void __init parse_early_param(void);
268void __init parse_early_options(char *cmdline);
269#endif
270
271#else
272
273#define __setup_param(str, unique_id, fn)
274#define __setup(str, func)
275#endif
276
277
278#define __nosavedata __section(.data..nosave)
279
280#ifdef MODULE
281#define __exit_p(x) x
282#else
283#define __exit_p(x) NULL
284#endif
285
286#endif
287