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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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
119#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
120typedef int initcall_entry_t;
121
122static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
123{
124 return offset_to_ptr(entry);
125}
126#else
127typedef initcall_t initcall_entry_t;
128
129static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
130{
131 return *entry;
132}
133#endif
134
135extern initcall_entry_t __con_initcall_start[], __con_initcall_end[];
136extern initcall_entry_t __security_initcall_start[], __security_initcall_end[];
137
138
139typedef void (*ctor_fn_t)(void);
140
141
142extern int do_one_initcall(initcall_t fn);
143extern char __initdata boot_command_line[];
144extern char *saved_command_line;
145extern unsigned int reset_devices;
146
147
148void setup_arch(char **);
149void prepare_namespace(void);
150void __init load_default_modules(void);
151int __init init_rootfs(void);
152
153#if defined(CONFIG_STRICT_KERNEL_RWX) || defined(CONFIG_STRICT_MODULE_RWX)
154extern bool rodata_enabled;
155#endif
156#ifdef CONFIG_STRICT_KERNEL_RWX
157void mark_rodata_ro(void);
158#endif
159
160extern void (*late_time_init)(void);
161
162extern bool initcall_debug;
163
164#endif
165
166#ifndef MODULE
167
168#ifndef __ASSEMBLY__
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186#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
187#define ___define_initcall(fn, id, __sec) \
188 __ADDRESSABLE(fn) \
189 asm(".section \"" #__sec ".init\", \"a\" \n" \
190 "__initcall_" #fn #id ": \n" \
191 ".long " #fn " - . \n" \
192 ".previous \n");
193#else
194#define ___define_initcall(fn, id, __sec) \
195 static initcall_t __initcall_##fn##id __used \
196 __attribute__((__section__(#__sec ".init"))) = fn;
197#endif
198
199#define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
200
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205
206#define early_initcall(fn) __define_initcall(fn, early)
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215#define pure_initcall(fn) __define_initcall(fn, 0)
216
217#define core_initcall(fn) __define_initcall(fn, 1)
218#define core_initcall_sync(fn) __define_initcall(fn, 1s)
219#define postcore_initcall(fn) __define_initcall(fn, 2)
220#define postcore_initcall_sync(fn) __define_initcall(fn, 2s)
221#define arch_initcall(fn) __define_initcall(fn, 3)
222#define arch_initcall_sync(fn) __define_initcall(fn, 3s)
223#define subsys_initcall(fn) __define_initcall(fn, 4)
224#define subsys_initcall_sync(fn) __define_initcall(fn, 4s)
225#define fs_initcall(fn) __define_initcall(fn, 5)
226#define fs_initcall_sync(fn) __define_initcall(fn, 5s)
227#define rootfs_initcall(fn) __define_initcall(fn, rootfs)
228#define device_initcall(fn) __define_initcall(fn, 6)
229#define device_initcall_sync(fn) __define_initcall(fn, 6s)
230#define late_initcall(fn) __define_initcall(fn, 7)
231#define late_initcall_sync(fn) __define_initcall(fn, 7s)
232
233#define __initcall(fn) device_initcall(fn)
234
235#define __exitcall(fn) \
236 static exitcall_t __exitcall_##fn __exit_call = fn
237
238#define console_initcall(fn) ___define_initcall(fn,, .con_initcall)
239#define security_initcall(fn) ___define_initcall(fn,, .security_initcall)
240
241struct obs_kernel_param {
242 const char *str;
243 int (*setup_func)(char *);
244 int early;
245};
246
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253#define __setup_param(str, unique_id, fn, early) \
254 static const char __setup_str_##unique_id[] __initconst \
255 __aligned(1) = str; \
256 static struct obs_kernel_param __setup_##unique_id \
257 __used __section(.init.setup) \
258 __attribute__((aligned((sizeof(long))))) \
259 = { __setup_str_##unique_id, fn, early }
260
261#define __setup(str, fn) \
262 __setup_param(str, fn, fn, 0)
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267
268#define early_param(str, fn) \
269 __setup_param(str, fn, fn, 1)
270
271#define early_param_on_off(str_on, str_off, var, config) \
272 \
273 int var = IS_ENABLED(config); \
274 \
275 static int __init parse_##var##_on(char *arg) \
276 { \
277 var = 1; \
278 return 0; \
279 } \
280 __setup_param(str_on, parse_##var##_on, parse_##var##_on, 1); \
281 \
282 static int __init parse_##var##_off(char *arg) \
283 { \
284 var = 0; \
285 return 0; \
286 } \
287 __setup_param(str_off, parse_##var##_off, parse_##var##_off, 1)
288
289
290void __init parse_early_param(void);
291void __init parse_early_options(char *cmdline);
292#endif
293
294#else
295
296#define __setup_param(str, unique_id, fn)
297#define __setup(str, func)
298#endif
299
300
301#define __nosavedata __section(.data..nosave)
302
303#ifdef MODULE
304#define __exit_p(x) x
305#else
306#define __exit_p(x) NULL
307#endif
308
309#endif
310