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 */ 28 extern char _text[], _stext[], _etext[]; 29 extern char _data[], _sdata[], _edata[]; 30 extern char __bss_start[], __bss_stop[]; 31 extern char __init_begin[], __init_end[]; 32 extern char _sinittext[], _einittext[]; 33 extern char _end[]; 34 extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[]; 35 extern char __kprobes_text_start[], __kprobes_text_end[]; 36 extern char __entry_text_start[], __entry_text_end[]; 37 extern char __start_rodata[], __end_rodata[]; 38 39 /* Start and end of .ctors section - used for constructor calls. */ 40 extern char __ctors_start[], __ctors_end[]; 41 42 extern __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 53 static inline int arch_is_kernel_text(unsigned long addr) 54 { 55 return 0; 56 } 57 #endif 58 59 #ifndef arch_is_kernel_data 60 static inline int arch_is_kernel_data(unsigned long addr) 61 { 62 return 0; 63 } 64 #endif 65 66 #endif /* _ASM_GENERIC_SECTIONS_H_ */ 67