1#ifndef _ASM_GENERIC_SECTIONS_H_
2#define _ASM_GENERIC_SECTIONS_H_
3
4/* References to section boundaries */
5
6#include <linux/compiler.h>
7
8/*
9 * Usage guidelines:
10 * _text, _data: architecture specific, don't use them in arch-independent code
11 * [_stext, _etext]: contains .text.* sections, may also contain .rodata.*
12 *                   and/or .init.* sections
13 * [_sdata, _edata]: contains .data.* sections, may also contain .rodata.*
14 *                   and/or .init.* sections.
15 * [__start_rodata, __end_rodata]: contains .rodata.* sections
16 * [__init_begin, __init_end]: contains .init.* sections, but .init.text.*
17 *                   may be out of this range on some architectures.
18 * [_sinittext, _einittext]: contains .init.text.* sections
19 * [__bss_start, __bss_stop]: contains BSS sections
20 *
21 * Following global variables are optional and may be unavailable on some
22 * architectures and/or kernel configurations.
23 *	_text, _data
24 *	__kprobes_text_start, __kprobes_text_end
25 *	__entry_text_start, __entry_text_end
26 *	__ctors_start, __ctors_end
27 */
28extern char _text[], _stext[], _etext[];
29extern char _data[], _sdata[], _edata[];
30extern char __bss_start[], __bss_stop[];
31extern char __init_begin[], __init_end[];
32extern char _sinittext[], _einittext[];
33extern char _end[];
34extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
35extern char __kprobes_text_start[], __kprobes_text_end[];
36extern char __entry_text_start[], __entry_text_end[];
37extern char __start_rodata[], __end_rodata[];
38
39/* Start and end of .ctors section - used for constructor calls. */
40extern char __ctors_start[], __ctors_end[];
41
42extern __visible const void __nosave_begin, __nosave_end;
43
44/* function descriptor handling (if any).  Override
45 * in asm/sections.h */
46#ifndef dereference_function_descriptor
47#define dereference_function_descriptor(p) (p)
48#endif
49
50/* random extra sections (if any).  Override
51 * in asm/sections.h */
52#ifndef arch_is_kernel_text
53static inline int arch_is_kernel_text(unsigned long addr)
54{
55	return 0;
56}
57#endif
58
59#ifndef arch_is_kernel_data
60static inline int arch_is_kernel_data(unsigned long addr)
61{
62	return 0;
63}
64#endif
65
66#endif /* _ASM_GENERIC_SECTIONS_H_ */
67