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